Water supply and drainage internship
Water supply and drainage internship papers Our internship location is Shanghai, March 4, XX, staying at Tongji University. Formally started on the 5th. Shanghai is located in the alluvial plain of the Yangtze River Delta, with mild and humid climate, early development and economic prosperity. Since the reform and opening up, it has seen rapid development and become an international metropolis with advanced fire protection technology and equipment, reliable power supply and management. It is unique in all aspects of climate, geology, hydrology, human environment and economy. Our internships include construction water supply and drainage and water supply and drainage treatment plants. We went to New Century Building, Shanghai First Department Store, Yuepu Water Plant, Shidongkou Wastewater Treatment Plant, First Yaohan, Baoshan Iron and Steel Co., Ltd. There are several representative places such as Zhabei Water Plant. The following are some of the specific content I learned during my internship .
Internship location: New Century Building, Shanghai No. 1 Department Store, First Yaohan
Internship content: The first visit is the new century building located on the appointed square road. It is a comprehensive large shopping mall. Our visit focused on the fire protection system, and fire shutters were set up on each floor of the building. Its fire shutters and fire doors are distributed with concentrated display of action signals and a pre-action sprinkler system. The preaction system combines the automatic detection of fire alarm technology with the automatic sprinkler system to protect the object. According to whether the nozzle is blocked, the nozzle can be divided into an open nozzle and a closed nozzle. The open nozzles used in this building are approximately 3 meters apart and the closed nozzles are approximately 1.5 meters apart. According to the water distribution curve, that is, the maximum protection area of the nozzle, it can be divided into standard nozzles and extended coverage nozzles. For the medium i dangerous level 1, the maximum protection area of the standard nozzle is 12.5m2, and the maximum protection area of the extended coverage nozzle is up to 37.1m2; the selection and application of the nozzle should be based on the fire risk and protection of the protection site. The architectural structure of the space and the characteristics of the sprinkler system itself. The distance between the fire hydrants should ensure that the water guns with two fire hydrants in any part of the same layer are filled at the same time. For the height of the high water tank, the "Regulations" stipulate that it is located at the highest point of the building. The "High Regulations" require that the top fire hydrant be 0.07mpa. Hydrostatic pressure. These regulations fail to address the purpose of setting the height of the high water tank. The Regulations clarify that: “The set height of the high fire water tank should ensure that the water supply network of the fire hydrant water supply system and the sprinkler system can be filled with water. ". and require: "The hydrostatic pressure of the nozzle at the most unfavorable point of the automatic sprinkler system is not less than 0.05mpa". This is consistent with the "Design Specification for Automatic Sprinkler System" and expresses the water tank to the fire water supply. The basic purpose of the pipe network. The building water tank has a fire water volume for 10 minutes, and the safety passage is a positive pressure air supply.
Then we visited the first department store in Shanghai opposite the New Century Building. The most local practice in Shanghai is that the fire pump can absorb water directly from the municipal water supply network. The advantage of direct water absorption is that the water pressure of the urban pipe network can be fully utilized, the cost of the fire pool can be saved, the secondary pollution of the pool can be reduced, and the water pump can be automatically started. The fire water consumption of this building is calculated according to a type of high-rise building with a height of more than 50m. The fire duration is calculated in 2h; the automatic sprinkler system is used; there is an automatic roller blind fire door. The fire zone is a separate area and is fireproofed with fire shutters. The fire resistance of the fire zone is >0.5h, the pressure resistance of the basement is >4800pa, and the pressure resistance of the above ground layer is >2400pa. The ventilation system of the fire zone should be closed before the CO2 fire extinguishing agent is sprayed, and the fireproof valve should be set. The doors of the fire zone are equipped with automatic fire doors. Set sound and light alarms and signal signs for releasing carbon dioxide fire extinguishing agents outside the fire zone. In order to ensure the safe evacuation of personnel, a fire alarm should be issued before the release of carbon dioxide fire extinguishing agent, and the delay time from fire alarm to release of fire extinguishing agent is 30s. In order to ensure the reliability of fire extinguishing, the necessary linkage operation should be ensured before or at the same time as releasing the carbon dioxide fire extinguishing agent. That is, when the fire extinguishing system issues a fire extinguishing command, the control system issues a linkage command to cut off the power, shut down or stop all effects on the fire extinguishing effect. device of. The fire prevention area is equipped with exhaust equipment. After the fire extinguishing agent is released, the exhausted personnel should be exhausted before the personnel can enter for maintenance; if it is necessary to enter in advance, an oxygen breathing apparatus is required. “When the sprinkler system has one of the following conditions, there is no fire water tank:
1. The water source can guarantee the system water quantity and water pressure requirements.
2. There are regulated water pumps or air pressure water supply settings in buildings with light and medium danger levels. The pressure tank has a water storage capacity of not less than 3 m”.
The main difference between the above buildings is the difference in escape methods. The new century building is a fire curtain that automatically leaves a certain space to escape and automatically closes at a certain time; Shanghai's first department store, the first Yaohan is located next to the fire shutter door A dedicated escape door. These buildings are all buildings with a height of more than 50m. The outdoor fire water consumption is 30l/s, the indoor fire water consumption is 40l/s, the fire duration is calculated according to 2h; the automatic fire extinguishing system fire water consumption is 30l/s, and the fire duration is 1h calculation.
Internship location: Yuepu Water Plant, Shidongkou Sewage Treatment Plant
Internship content: Shanghai Yuepu Water Supply Plant is located at No. 167, Lianshui Road, Baoshan District, Shanghai. It mainly undertakes water supply tasks in some areas of Shanghai Baoshan District and Zhabei and Putuo Districts. The daily water supply capacity is 400,000 cubic meters, which is the first in Shanghai. The tap water plant using the Yangtze River water as the raw water is introduced from the Yangtze River by a water inlet pipe with a diameter of 1200 mm and 1400 mm. Shanghai Yuepu Water Supply Plant has four flat-flow sedimentation tanks with a daily processing capacity of 100,000 cubic meters, a gas-water recoil filter with a daily processing capacity of 200,000 cubic meters, and a “v”-type filter tank with a daily processing capacity of 200,000 cubic meters. Each one has four clear reservoirs with a volume of 7,000 cubic meters, two clear reservoirs with a capacity of 5,000 cubic meters, and one water pump house with a daily water supply capacity of 400,000 cubic meters. The water plant adopts folding plate, straight plate and relatively straight flocculation tank, the reaction time is 15min; the coagulant adopts basic aluminum chloride at low temperature, activates citric acid to assist coagulation, and uses aluminum sulfate when it is greater than 15 °C; The advection sedimentation tank; the filtration uses a "v" type filter. Related to the contents of this water supply and drainage internship :
Control Engineering Internship Summary <br>The Shidongkou Sewage Treatment Plant is located at No. 200, Coal Water Road. It mainly collects sewage from the main line of Shanghai West, with a service area of 1.5 million square meters and a service population of 700,000. The processing capacity is 400,000 tons per day. Industrial and domestic sewage each account for half. The municipal wastewater is treated by the integrated activated sludge process with nitrogen and phosphorus removal functions. The effluent water quality can reach the national first-class discharge standard, and can be reused as miscellaneous water after deep treatment by the valveless filter and chlorination disinfection process.
Internship location: Baoshan Iron and Steel Co., Ltd., Zhabei Water Plant
Internship content: Baoshan Iron & Steel Co., Ltd. is located in Shanghai Baoshan Yuepu District. The company specializes in producing high-tech and high value-added steel products, mainly used in automobile manufacturing, home appliance production, oil exploitation, oil and gas transportation, pressure vessels, container materials. And other fields. Due to the traditional steel slag treatment process, the recovery rate of residual steel is low, the operation energy consumption is large, the environment is polluted, the danger is high, and the slag utilization efficiency is low. Baosteel In June 1998, the world's first new way of short-flow slag treatment test equipment was put into use in Baosteel. The slag treatment uses a new process that is suitable for large-scale steel production and advanced and reliable. Through a series of treatment processes such as water spray cooling, secondary metal recovery, and comprehensive utilization of tailings, the iron, nickel, chromium and other precious metals in the stainless steel slag are fully recovered, and the non-metal tailings are comprehensively utilized. The influence of the hot rolling process temperature system on the electromagnetic properties of non-oriented electrical steel is described in detail. Reasonable control of slab heating temperature, rolling temperature and coiling temperature can effectively improve the electromagnetic properties of non-oriented electrical steel products. The process design of turbid circulating water treatment in hot rolling engineering uses technical techniques and equipment such as chemical degreasing process and automatic backwashing filter to treat the technical characteristics of stainless steel hot rolled turbid water.
Zhabei Water Plant of Shanghai Waterworks North Co., Ltd. is located at No. 65, Zhainin Road, Yangpu District. The factory is located on the east and west sides of Zhainin Road and covers an area of 37,648 square meters. Founded in 1911 during the Xuantong period of the Qing Dynasty, the factory is an old factory with a history of more than 90 years. The temple-style hall and water tower are witnesses to the long history of the water plant. The water plant has a green coverage rate of 40%. It was named in 1998. As the "Shanghai Garden-style Factory", the factory currently has 120 registered employees, including 32 professional and technical personnel and 12 middle and senior professional titles. The internal organization has set up a workshop for four departments, namely: Political Management Division, Integrated Management Section, Business Management Section, Production Management Section and Operation Workshop. The three antique buildings of the water tower, the pump house and the material warehouse were included in the first batch of cultural relics protection units in Yangpu District. After three large-scale renovations, Zhabei Waterworks has successively carried out the expansion and reconstruction of 80,000 tons of systems, the reconstruction of three sedimentation tanks, and the construction of a new 200,000-ton v-type filter tank, which has greatly increased the water supply capacity of enterprises to the initial stage of construction. 28 times, the daily water supply capacity of the water plant is 280,000 cubic meters, which mainly supplies domestic and industrial water for nearly one million people in Yangpu, Hongkou and Baoshan. The plant has two sets of water system, which are 80,000 tons and 200,000 tons respectively. Among them, 80,000 tons of water system has a folding plate reaction tank, a flat flow sedimentation tank and a common quick filter. 1 Qingqing Reservoir and 1 outlet pumping station, with 2 630kw outlets; 200,000 tons of water system with folding plate reaction tank, inclined tube sedimentation tank 2, v-type filter tank, clear There are 2 reservoirs and 2 outlet pumping stations with 5 outlets. The specific process flow is: the raw water of the Yangtze River enters the Zhabei Water Plant through the inlet pipe of dn1600. First, by adding chlorine and twisting, the raw water is added with a chemical, and after a sufficient mixing reaction, a large amount of suspended matter and colloidal impurities in the raw water are flocculated. Then, in the sedimentation tank, the mud water separation is carried out by the gravity of the particles, and then filtered through the filter tank to remove the residual turbidity in the water after the sedimentation, so that the water is further cleared, and finally the chlorine and ammonia are added to the filtered water for disinfection, further The purpose of killing bacteria in the water is achieved to ensure the water quality of the factory water. In the whole process of water purification, the water plant strictly follows the iso9002 quality system, implements dynamic monitoring of the whole process of the production process, and uses the on-line water quality instrument to conduct water quality monitoring throughout the whole process and regular inspection of the water quality department, and strictly control the water production process. The quality of production makes the factory water reach the national drinking water standard. The clean tap water is pumped into the municipal pipe network through the pump of the secondary pump house and delivered to thousands of households.
After this field internship , we have linked the knowledge we have learned in the classroom with the actual application, and have gained a deeper understanding of the process of building water supply and drainage, water supply and drainage treatment. Through the explanation of the staff, we have learned some new technologies and The new craftsmanship also knows some work-time skills, which will be of great help in my future study and work. Although we are about to leave school, the rapid development of science and technology now urges us to study at all times to keep up with the development of the times.
Internship location: New Century Building, Shanghai No. 1 Department Store, First Yaohan
Internship content: The first visit is the new century building located on the appointed square road. It is a comprehensive large shopping mall. Our visit focused on the fire protection system, and fire shutters were set up on each floor of the building. Its fire shutters and fire doors are distributed with concentrated display of action signals and a pre-action sprinkler system. The preaction system combines the automatic detection of fire alarm technology with the automatic sprinkler system to protect the object. According to whether the nozzle is blocked, the nozzle can be divided into an open nozzle and a closed nozzle. The open nozzles used in this building are approximately 3 meters apart and the closed nozzles are approximately 1.5 meters apart. According to the water distribution curve, that is, the maximum protection area of the nozzle, it can be divided into standard nozzles and extended coverage nozzles. For the medium i dangerous level 1, the maximum protection area of the standard nozzle is 12.5m2, and the maximum protection area of the extended coverage nozzle is up to 37.1m2; the selection and application of the nozzle should be based on the fire risk and protection of the protection site. The architectural structure of the space and the characteristics of the sprinkler system itself. The distance between the fire hydrants should ensure that the water guns with two fire hydrants in any part of the same layer are filled at the same time. For the height of the high water tank, the "Regulations" stipulate that it is located at the highest point of the building. The "High Regulations" require that the top fire hydrant be 0.07mpa. Hydrostatic pressure. These regulations fail to address the purpose of setting the height of the high water tank. The Regulations clarify that: “The set height of the high fire water tank should ensure that the water supply network of the fire hydrant water supply system and the sprinkler system can be filled with water. ". and require: "The hydrostatic pressure of the nozzle at the most unfavorable point of the automatic sprinkler system is not less than 0.05mpa". This is consistent with the "Design Specification for Automatic Sprinkler System" and expresses the water tank to the fire water supply. The basic purpose of the pipe network. The building water tank has a fire water volume for 10 minutes, and the safety passage is a positive pressure air supply.
Then we visited the first department store in Shanghai opposite the New Century Building. The most local practice in Shanghai is that the fire pump can absorb water directly from the municipal water supply network. The advantage of direct water absorption is that the water pressure of the urban pipe network can be fully utilized, the cost of the fire pool can be saved, the secondary pollution of the pool can be reduced, and the water pump can be automatically started. The fire water consumption of this building is calculated according to a type of high-rise building with a height of more than 50m. The fire duration is calculated in 2h; the automatic sprinkler system is used; there is an automatic roller blind fire door. The fire zone is a separate area and is fireproofed with fire shutters. The fire resistance of the fire zone is >0.5h, the pressure resistance of the basement is >4800pa, and the pressure resistance of the above ground layer is >2400pa. The ventilation system of the fire zone should be closed before the CO2 fire extinguishing agent is sprayed, and the fireproof valve should be set. The doors of the fire zone are equipped with automatic fire doors. Set sound and light alarms and signal signs for releasing carbon dioxide fire extinguishing agents outside the fire zone. In order to ensure the safe evacuation of personnel, a fire alarm should be issued before the release of carbon dioxide fire extinguishing agent, and the delay time from fire alarm to release of fire extinguishing agent is 30s. In order to ensure the reliability of fire extinguishing, the necessary linkage operation should be ensured before or at the same time as releasing the carbon dioxide fire extinguishing agent. That is, when the fire extinguishing system issues a fire extinguishing command, the control system issues a linkage command to cut off the power, shut down or stop all effects on the fire extinguishing effect. device of. The fire prevention area is equipped with exhaust equipment. After the fire extinguishing agent is released, the exhausted personnel should be exhausted before the personnel can enter for maintenance; if it is necessary to enter in advance, an oxygen breathing apparatus is required. “When the sprinkler system has one of the following conditions, there is no fire water tank:
1. The water source can guarantee the system water quantity and water pressure requirements.
2. There are regulated water pumps or air pressure water supply settings in buildings with light and medium danger levels. The pressure tank has a water storage capacity of not less than 3 m”.
The main difference between the above buildings is the difference in escape methods. The new century building is a fire curtain that automatically leaves a certain space to escape and automatically closes at a certain time; Shanghai's first department store, the first Yaohan is located next to the fire shutter door A dedicated escape door. These buildings are all buildings with a height of more than 50m. The outdoor fire water consumption is 30l/s, the indoor fire water consumption is 40l/s, the fire duration is calculated according to 2h; the automatic fire extinguishing system fire water consumption is 30l/s, and the fire duration is 1h calculation.
Internship location: Yuepu Water Plant, Shidongkou Sewage Treatment Plant
Internship content: Shanghai Yuepu Water Supply Plant is located at No. 167, Lianshui Road, Baoshan District, Shanghai. It mainly undertakes water supply tasks in some areas of Shanghai Baoshan District and Zhabei and Putuo Districts. The daily water supply capacity is 400,000 cubic meters, which is the first in Shanghai. The tap water plant using the Yangtze River water as the raw water is introduced from the Yangtze River by a water inlet pipe with a diameter of 1200 mm and 1400 mm. Shanghai Yuepu Water Supply Plant has four flat-flow sedimentation tanks with a daily processing capacity of 100,000 cubic meters, a gas-water recoil filter with a daily processing capacity of 200,000 cubic meters, and a “v”-type filter tank with a daily processing capacity of 200,000 cubic meters. Each one has four clear reservoirs with a volume of 7,000 cubic meters, two clear reservoirs with a capacity of 5,000 cubic meters, and one water pump house with a daily water supply capacity of 400,000 cubic meters. The water plant adopts folding plate, straight plate and relatively straight flocculation tank, the reaction time is 15min; the coagulant adopts basic aluminum chloride at low temperature, activates citric acid to assist coagulation, and uses aluminum sulfate when it is greater than 15 °C; The advection sedimentation tank; the filtration uses a "v" type filter. Related to the contents of this water supply and drainage internship :
Control Engineering Internship Summary <br>The Shidongkou Sewage Treatment Plant is located at No. 200, Coal Water Road. It mainly collects sewage from the main line of Shanghai West, with a service area of 1.5 million square meters and a service population of 700,000. The processing capacity is 400,000 tons per day. Industrial and domestic sewage each account for half. The municipal wastewater is treated by the integrated activated sludge process with nitrogen and phosphorus removal functions. The effluent water quality can reach the national first-class discharge standard, and can be reused as miscellaneous water after deep treatment by the valveless filter and chlorination disinfection process.
Internship location: Baoshan Iron and Steel Co., Ltd., Zhabei Water Plant
Internship content: Baoshan Iron & Steel Co., Ltd. is located in Shanghai Baoshan Yuepu District. The company specializes in producing high-tech and high value-added steel products, mainly used in automobile manufacturing, home appliance production, oil exploitation, oil and gas transportation, pressure vessels, container materials. And other fields. Due to the traditional steel slag treatment process, the recovery rate of residual steel is low, the operation energy consumption is large, the environment is polluted, the danger is high, and the slag utilization efficiency is low. Baosteel In June 1998, the world's first new way of short-flow slag treatment test equipment was put into use in Baosteel. The slag treatment uses a new process that is suitable for large-scale steel production and advanced and reliable. Through a series of treatment processes such as water spray cooling, secondary metal recovery, and comprehensive utilization of tailings, the iron, nickel, chromium and other precious metals in the stainless steel slag are fully recovered, and the non-metal tailings are comprehensively utilized. The influence of the hot rolling process temperature system on the electromagnetic properties of non-oriented electrical steel is described in detail. Reasonable control of slab heating temperature, rolling temperature and coiling temperature can effectively improve the electromagnetic properties of non-oriented electrical steel products. The process design of turbid circulating water treatment in hot rolling engineering uses technical techniques and equipment such as chemical degreasing process and automatic backwashing filter to treat the technical characteristics of stainless steel hot rolled turbid water.
Zhabei Water Plant of Shanghai Waterworks North Co., Ltd. is located at No. 65, Zhainin Road, Yangpu District. The factory is located on the east and west sides of Zhainin Road and covers an area of 37,648 square meters. Founded in 1911 during the Xuantong period of the Qing Dynasty, the factory is an old factory with a history of more than 90 years. The temple-style hall and water tower are witnesses to the long history of the water plant. The water plant has a green coverage rate of 40%. It was named in 1998. As the "Shanghai Garden-style Factory", the factory currently has 120 registered employees, including 32 professional and technical personnel and 12 middle and senior professional titles. The internal organization has set up a workshop for four departments, namely: Political Management Division, Integrated Management Section, Business Management Section, Production Management Section and Operation Workshop. The three antique buildings of the water tower, the pump house and the material warehouse were included in the first batch of cultural relics protection units in Yangpu District. After three large-scale renovations, Zhabei Waterworks has successively carried out the expansion and reconstruction of 80,000 tons of systems, the reconstruction of three sedimentation tanks, and the construction of a new 200,000-ton v-type filter tank, which has greatly increased the water supply capacity of enterprises to the initial stage of construction. 28 times, the daily water supply capacity of the water plant is 280,000 cubic meters, which mainly supplies domestic and industrial water for nearly one million people in Yangpu, Hongkou and Baoshan. The plant has two sets of water system, which are 80,000 tons and 200,000 tons respectively. Among them, 80,000 tons of water system has a folding plate reaction tank, a flat flow sedimentation tank and a common quick filter. 1 Qingqing Reservoir and 1 outlet pumping station, with 2 630kw outlets; 200,000 tons of water system with folding plate reaction tank, inclined tube sedimentation tank 2, v-type filter tank, clear There are 2 reservoirs and 2 outlet pumping stations with 5 outlets. The specific process flow is: the raw water of the Yangtze River enters the Zhabei Water Plant through the inlet pipe of dn1600. First, by adding chlorine and twisting, the raw water is added with a chemical, and after a sufficient mixing reaction, a large amount of suspended matter and colloidal impurities in the raw water are flocculated. Then, in the sedimentation tank, the mud water separation is carried out by the gravity of the particles, and then filtered through the filter tank to remove the residual turbidity in the water after the sedimentation, so that the water is further cleared, and finally the chlorine and ammonia are added to the filtered water for disinfection, further The purpose of killing bacteria in the water is achieved to ensure the water quality of the factory water. In the whole process of water purification, the water plant strictly follows the iso9002 quality system, implements dynamic monitoring of the whole process of the production process, and uses the on-line water quality instrument to conduct water quality monitoring throughout the whole process and regular inspection of the water quality department, and strictly control the water production process. The quality of production makes the factory water reach the national drinking water standard. The clean tap water is pumped into the municipal pipe network through the pump of the secondary pump house and delivered to thousands of households.
After this field internship , we have linked the knowledge we have learned in the classroom with the actual application, and have gained a deeper understanding of the process of building water supply and drainage, water supply and drainage treatment. Through the explanation of the staff, we have learned some new technologies and The new craftsmanship also knows some work-time skills, which will be of great help in my future study and work. Although we are about to leave school, the rapid development of science and technology now urges us to study at all times to keep up with the development of the times.
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