Drainage engineering professional water plant graduation internship summary report
Graduation internship is one of the most important practical teaching links in the water and drainage engineering professional teaching plan. Its purpose is to enable students to further understand and master professional knowledge, expand the scope of students' professional knowledge, and deepen and consolidate the theoretical knowledge they have learned. . To enable students to understand the engineering construction program and the design depth and requirements of each design stage, master the urban water supply engineering, drainage engineering design content, steps and methods; improve students' ability to comprehensively apply professional knowledge to solve practical engineering problems. At the same time, through the field visits, instructor guidance and data inquiry and other internship methods, collect information related to graduation design topics, and prepare for graduation design.
Internship Location: Zigong City First Water Plant
Zigong City Zhonglian Water Purification Co., Ltd. sewage treatment plant
Internship time: XX years.3.12 to XX years.4.9
Internship of the first water plant in Zigong City
Water plant introduction:
The first water plant in Zigong City is located in Changtu Town, Gongjing District. It was built in 1958 and has a designed daily water treatment capacity of 0.3 million tons per day. The water source of the water plant is mainly Shuangxi Reservoir water, which is transported to the plant through a pipeline of more than 20 kilometers and 8 kilometers of pipeline at the back. The maximum water delivery capacity is 50,000 tons/day of single-tube water delivery; the Xushui River Heavy Beach is the plant. Safe backup water source. The water quality of the water source meets the national standard water quality standards for surface water sources. The water plant is mainly supplied to Gongjing District and Huidong City. The water plant has a beautiful environment and is a provincial garden-style greening unit. The water treatment production process of a water plant is: according to the water quality of the source water, pre-chlorination is carried out on the water diversion pipeline. After the source water enters the reaction tank, a coagulant is added to the reaction tank for coagulation reaction, and then enters the sedimentation tank for precipitation. After the reaction, the water after the precipitation enters the filter to be filtered, and the filtered water is chlorinated and disinfected to enter the clear water pool. The water in the clear water pool is sent to the urban pipe network through the water pumping station. The plant currently implements automated management in both the chlorination and dosing processes, and the production process is monitored in a timely manner. Ensure that the water quality of the factory water meets the national drinking water hygiene standards.
Internship content:
1. Understand the urban water resources, the water source of the water plant, the principle of water plant site selection, and the water quality requirements.
Water resources in Zigong City: Zigong City is a water-deficient city. It has the characteristics of resource, engineering, water quality and water shortage. The reasons for water shortage: 1. No big rivers and rivers, lack of large-scale backbone water conservancy projects, total water resources and Engineering control capacity is limited. 2. The pollution of industrial enterprises is serious. The water quality of some river sections of Weiyuan River and Busi River that have passed through the urban area has basically lost its function. 3. The rainfall is unevenly distributed in time and space. The frequency of droughts is as high as 58.3%. Since the devastating drought in the past 80 years in Zigong City, the winter and spring droughts have followed, resulting in a serious shortage of water in existing water conservancy projects. In particular, the Shuangxi Reservoir, which is an important source of water supply in Zigong City, is seriously deficient in water storage. The contradiction between urban life and production water is prominent.
Water source of the water plant: The main source of water is the high-quality water of the Shuangxi Reservoir, and the standby water source is the Xushui River.
Water plant address: Located on the upper mound of the Xushui River, close to the river bank, it is convenient to build a shore-type water pumping station. The distance from the water supply area: the location of Gongjing District and Ziliujing District is relatively close, and it is convenient for the water to flow from the Shuangxi Reservoir of Rong County to Changtu Town of Zigong City. It is close to the road and has convenient transportation.
The effluent water quality: remote online monitoring: raw water quality control point, pre-filtration water quality control point, filtered water quality control point, effluent water quality control point, effluent water meter, effluent water pressure gauge, strict control of effluent water quality.
2. Understand the scale, process flow, layout and vertical layout of the water plant.
Water plant scale: The first water plant of Zigong City Water Supply and Drainage Company has a scale of 100,000 m3/d.
3. Understand the variety, dosage and method of using water purification chemicals in water plants; disinfection methods, dosage and equipment.
4. Familiar with and understand the type, structure, working process, basic design parameters and operation management content, methods and experience of each individual structure.
1) Water intake structure: design principle and location selection, form and structure, content and method of operation management, arrangement of pumping house, selection of water pump and selection of auxiliary equipment.
2) Mixing and reaction equipment: mixing equipment type, design operating parameters. The design, operation and design parameters of the reaction cell are designed.
3) Inclined tube sedimentation tank: construction, working characteristics, design operating parameters and ancillary equipment.
4) Gravity valveless filter: construction, process size, water distribution system form, filter material type, gradation and number of layers, flushing method, strength and duration, expansion, supply and elimination of flushing water, pipe gallery layout, automatic control Equipment, filter running operation program, processing effect, etc.
5) Disinfection equipment: disinfection method, chlorination, chlorination and chlorine bottle storage.
6) Clear water pool and water pumping station: the volume, structure and size of the clear water pool, the working characteristics of the water pumping station, the pump arrangement and scheduling method.
5. Understand the automation facilities and operation of the water plant.
6. Understand the organization management and operation indicators of the water plant, including staffing, water loss and water consumption of the water plant, electricity consumption per ton of water, consumption of chemicals, water production cost and water price.
Internship experience:
Through the on-site visit to the water plant, first of all, the water plant's recent work situation, work tasks, water source problems, production processes have a further understanding, especially the sudden change of water sources, the proposed solution has a preliminary understanding. Secondly, the field observation of water production process is a traditional process. When the river was built in the 1960s, it produced several thousand tons of water. Later, due to the development needs of the city, it was transformed into 20,000 tons, 30,000 tons and 80,000 tons. The old system of valveless gravity filter is completed and put into operation in 1995. The new system was completed and put into production in 1999, gradually completing the change of production capacity. The process of processing: flocculation-precipitation-filtration process and its working principle have been A deeper understanding, and the theory and practice, from the theory to recognize the perceptual knowledge, more profoundly grasp the knowledge learned in the past, the theory guides the practice, and in this process finds that the theory is not perfect, not comprehensive, I also found some misunderstandings, combined with books, to further correct and improve my theoretical knowledge, in order to improve and improve my professional knowledge.
Internship reflection:
Advantages of water plant design: 1. The garden-style design concept of the water plant factory reflects the idea of “environmental protection”. 2. The use of dual water source water supply ensures the safety of the water supply. 3. Adopt online monitoring system and automatic management to strictly ensure that the water quality of the factory water meets the national drinking water hygiene standards.
Insufficient design of the water plant: 1. The development needs of the water plant were not fully taken into consideration during the design, and sufficient development land was not reserved. 2. There is not enough foresight about changes in water quality, quantity of water, and some sudden problems, so there is no timely solution when problems arise. 3. Since the establishment of the water plant was in the 1960s, although after a series of transformations, its production process is still relatively backward and its impact resistance is weak.
Reflection: In the future study and work, we must stand on a high level to look at the problem, and analyze the problem to be profound, careful and comprehensive, especially when we are designing.
2. Internship of sewage treatment plant of Zilian City Zhonglian Water Purification Co., Ltd.
Brief introduction of sewage treatment plant: The project consists of urban sewage interception pipeline project, urban sewage treatment plant project and water reuse project. Among them, the total scale of the urban sewage treatment plant project is 100,000 tons/day of sewage treatment, which will be constructed in two phases. The construction scale of the first phase of the project is 50,000 tons/day, and the estimated investment is 75 million yuan, including investment of 47.85 million yuan in the plant area and 49 acres of construction land. The project adopts the bot operation mode, which is operated by Beijing Zhonglianhuan Engineering Co., Ltd. and Shanghai Zhongmei. Environmental Protection Development Co., Ltd. has been financing, general contracting construction and commissioned operations for 19 years. The first phase of the urban sewage treatment plant was started on September 15, XX. It was completed and put into operation at the end of XX. The water quality indicators of the factory reached the national level b emission standard. In May XX, the completion and comprehensive acceptance were passed. After the urban sewage treatment plant project is put into operation, it can intercept 70% of the sewage in the downtown area, 50,000 tons of sewage per day, serve a population of 350,000, and serve a total area of 24 square kilometers, which will make the urban ecological environment, human settlements and investment. The environment and urban landscape environment have been significantly improved.
Internship content:
1. Understand the principles, process and investment mode of wastewater treatment plant site selection.
Sewage treatment plant site: Beside the Busan River in Jin Village, Heping Township, Da'an District, Zigong City, located in the downwind side of the city's dominant wind direction and the downstream of the river section of the Busi River City.
Process flow: anaerobic + improved oxidation ditch
Blower room
Inlet → coarse grid → fine grid → lift pump station → grit chamber → anaerobic pool → oxidation ditch → second sinking pool → effluent
↑ ↓
Outbound landfill ← dewatering machine room ← The return pump room sewage treatment adopts anaerobic-oxidation ditch treatment process. After the completion of the project, the process flow during the EIA was slightly modified. The main changes were the change of the aeration of the turntable to blast aeration and the elimination of the selection and contact pool processes. The sewage treatment process is much longer than the general biological treatment method because the hydraulic retention time and the sludge age are relatively long, and the suspended organic matter and the dissolved organic matter are simultaneously thoroughly degraded. Therefore, the activated sludge has been highly stabilized in the system, so The remaining activated sludge only needs to be concentrated and dehydrated to save the sludge digestion tank. Simplification of the process reduces floor space, saves capital investment, and facilitates operational management.
Investment model: bot mode, realize the market-oriented allocation of public resources and the transformation of resources into capital, and minimize the risk of construction and operation of government public welfare environmental protection projects.
2. Understand the scale and flat and vertical layout of the wastewater treatment plant.
The scale of the sewage treatment plant: the total scale is 100,000 t/d, and the first phase of the project is 50,000 t/d.
3. Understand the sewage composition of the sewage treatment plant and the water quality, processing capacity, treatment level, treatment efficiency, sewage treatment and sludge disposal process and structure selection.
4. Familiar with and understand the form and construction of various structures, basic design parameters, operation methods and operational management are indeed various control indicators.
Primary processing part:
1) Pump house: grid design size, grid spacing and section shape, grid inclination angle, inter-gate flow rate, interception of dirt and dirt removal method; pool form, size and volume; pump room form, plane Arrangement, main process size, pump and motor selection, pump start-up mode, pipe diameter and elevation arrangement of inlet and outlet pipes.
2) Grit chamber: type, structure, design flow rate, design flow rate, popular time, sedimentation standard, and sand discharge method of grit chamber. A swirling grit chamber is used.
Secondary processing part:
1) Biochemical treatment tank: type, working principle, structure and process size of the biochemical treatment tank, design parameters and operating parameters, aeration form (air supply, diffusion device and oxygen transfer rate, microporous aerator
Internship Location: Zigong City First Water Plant
Zigong City Zhonglian Water Purification Co., Ltd. sewage treatment plant
Internship time: XX years.3.12 to XX years.4.9
Internship of the first water plant in Zigong City
Water plant introduction:
The first water plant in Zigong City is located in Changtu Town, Gongjing District. It was built in 1958 and has a designed daily water treatment capacity of 0.3 million tons per day. The water source of the water plant is mainly Shuangxi Reservoir water, which is transported to the plant through a pipeline of more than 20 kilometers and 8 kilometers of pipeline at the back. The maximum water delivery capacity is 50,000 tons/day of single-tube water delivery; the Xushui River Heavy Beach is the plant. Safe backup water source. The water quality of the water source meets the national standard water quality standards for surface water sources. The water plant is mainly supplied to Gongjing District and Huidong City. The water plant has a beautiful environment and is a provincial garden-style greening unit. The water treatment production process of a water plant is: according to the water quality of the source water, pre-chlorination is carried out on the water diversion pipeline. After the source water enters the reaction tank, a coagulant is added to the reaction tank for coagulation reaction, and then enters the sedimentation tank for precipitation. After the reaction, the water after the precipitation enters the filter to be filtered, and the filtered water is chlorinated and disinfected to enter the clear water pool. The water in the clear water pool is sent to the urban pipe network through the water pumping station. The plant currently implements automated management in both the chlorination and dosing processes, and the production process is monitored in a timely manner. Ensure that the water quality of the factory water meets the national drinking water hygiene standards.
Internship content:
1. Understand the urban water resources, the water source of the water plant, the principle of water plant site selection, and the water quality requirements.
Water resources in Zigong City: Zigong City is a water-deficient city. It has the characteristics of resource, engineering, water quality and water shortage. The reasons for water shortage: 1. No big rivers and rivers, lack of large-scale backbone water conservancy projects, total water resources and Engineering control capacity is limited. 2. The pollution of industrial enterprises is serious. The water quality of some river sections of Weiyuan River and Busi River that have passed through the urban area has basically lost its function. 3. The rainfall is unevenly distributed in time and space. The frequency of droughts is as high as 58.3%. Since the devastating drought in the past 80 years in Zigong City, the winter and spring droughts have followed, resulting in a serious shortage of water in existing water conservancy projects. In particular, the Shuangxi Reservoir, which is an important source of water supply in Zigong City, is seriously deficient in water storage. The contradiction between urban life and production water is prominent.
Water source of the water plant: The main source of water is the high-quality water of the Shuangxi Reservoir, and the standby water source is the Xushui River.
Water plant address: Located on the upper mound of the Xushui River, close to the river bank, it is convenient to build a shore-type water pumping station. The distance from the water supply area: the location of Gongjing District and Ziliujing District is relatively close, and it is convenient for the water to flow from the Shuangxi Reservoir of Rong County to Changtu Town of Zigong City. It is close to the road and has convenient transportation.
The effluent water quality: remote online monitoring: raw water quality control point, pre-filtration water quality control point, filtered water quality control point, effluent water quality control point, effluent water meter, effluent water pressure gauge, strict control of effluent water quality.
2. Understand the scale, process flow, layout and vertical layout of the water plant.
Water plant scale: The first water plant of Zigong City Water Supply and Drainage Company has a scale of 100,000 m3/d.
3. Understand the variety, dosage and method of using water purification chemicals in water plants; disinfection methods, dosage and equipment.
4. Familiar with and understand the type, structure, working process, basic design parameters and operation management content, methods and experience of each individual structure.
1) Water intake structure: design principle and location selection, form and structure, content and method of operation management, arrangement of pumping house, selection of water pump and selection of auxiliary equipment.
2) Mixing and reaction equipment: mixing equipment type, design operating parameters. The design, operation and design parameters of the reaction cell are designed.
3) Inclined tube sedimentation tank: construction, working characteristics, design operating parameters and ancillary equipment.
4) Gravity valveless filter: construction, process size, water distribution system form, filter material type, gradation and number of layers, flushing method, strength and duration, expansion, supply and elimination of flushing water, pipe gallery layout, automatic control Equipment, filter running operation program, processing effect, etc.
5) Disinfection equipment: disinfection method, chlorination, chlorination and chlorine bottle storage.
6) Clear water pool and water pumping station: the volume, structure and size of the clear water pool, the working characteristics of the water pumping station, the pump arrangement and scheduling method.
5. Understand the automation facilities and operation of the water plant.
6. Understand the organization management and operation indicators of the water plant, including staffing, water loss and water consumption of the water plant, electricity consumption per ton of water, consumption of chemicals, water production cost and water price.
Internship experience:
Through the on-site visit to the water plant, first of all, the water plant's recent work situation, work tasks, water source problems, production processes have a further understanding, especially the sudden change of water sources, the proposed solution has a preliminary understanding. Secondly, the field observation of water production process is a traditional process. When the river was built in the 1960s, it produced several thousand tons of water. Later, due to the development needs of the city, it was transformed into 20,000 tons, 30,000 tons and 80,000 tons. The old system of valveless gravity filter is completed and put into operation in 1995. The new system was completed and put into production in 1999, gradually completing the change of production capacity. The process of processing: flocculation-precipitation-filtration process and its working principle have been A deeper understanding, and the theory and practice, from the theory to recognize the perceptual knowledge, more profoundly grasp the knowledge learned in the past, the theory guides the practice, and in this process finds that the theory is not perfect, not comprehensive, I also found some misunderstandings, combined with books, to further correct and improve my theoretical knowledge, in order to improve and improve my professional knowledge.
Xiaobian Recommended and Drainage Engineering Professional Waterworks Graduation Internship Summary Report Related Articles:
Water supply and drainage internship papersInternship reflection:
Advantages of water plant design: 1. The garden-style design concept of the water plant factory reflects the idea of “environmental protection”. 2. The use of dual water source water supply ensures the safety of the water supply. 3. Adopt online monitoring system and automatic management to strictly ensure that the water quality of the factory water meets the national drinking water hygiene standards.
Insufficient design of the water plant: 1. The development needs of the water plant were not fully taken into consideration during the design, and sufficient development land was not reserved. 2. There is not enough foresight about changes in water quality, quantity of water, and some sudden problems, so there is no timely solution when problems arise. 3. Since the establishment of the water plant was in the 1960s, although after a series of transformations, its production process is still relatively backward and its impact resistance is weak.
Reflection: In the future study and work, we must stand on a high level to look at the problem, and analyze the problem to be profound, careful and comprehensive, especially when we are designing.
2. Internship of sewage treatment plant of Zilian City Zhonglian Water Purification Co., Ltd.
Brief introduction of sewage treatment plant: The project consists of urban sewage interception pipeline project, urban sewage treatment plant project and water reuse project. Among them, the total scale of the urban sewage treatment plant project is 100,000 tons/day of sewage treatment, which will be constructed in two phases. The construction scale of the first phase of the project is 50,000 tons/day, and the estimated investment is 75 million yuan, including investment of 47.85 million yuan in the plant area and 49 acres of construction land. The project adopts the bot operation mode, which is operated by Beijing Zhonglianhuan Engineering Co., Ltd. and Shanghai Zhongmei. Environmental Protection Development Co., Ltd. has been financing, general contracting construction and commissioned operations for 19 years. The first phase of the urban sewage treatment plant was started on September 15, XX. It was completed and put into operation at the end of XX. The water quality indicators of the factory reached the national level b emission standard. In May XX, the completion and comprehensive acceptance were passed. After the urban sewage treatment plant project is put into operation, it can intercept 70% of the sewage in the downtown area, 50,000 tons of sewage per day, serve a population of 350,000, and serve a total area of 24 square kilometers, which will make the urban ecological environment, human settlements and investment. The environment and urban landscape environment have been significantly improved.
Internship content:
1. Understand the principles, process and investment mode of wastewater treatment plant site selection.
Sewage treatment plant site: Beside the Busan River in Jin Village, Heping Township, Da'an District, Zigong City, located in the downwind side of the city's dominant wind direction and the downstream of the river section of the Busi River City.
Process flow: anaerobic + improved oxidation ditch
Blower room
Inlet → coarse grid → fine grid → lift pump station → grit chamber → anaerobic pool → oxidation ditch → second sinking pool → effluent
↑ ↓
Outbound landfill ← dewatering machine room ← The return pump room sewage treatment adopts anaerobic-oxidation ditch treatment process. After the completion of the project, the process flow during the EIA was slightly modified. The main changes were the change of the aeration of the turntable to blast aeration and the elimination of the selection and contact pool processes. The sewage treatment process is much longer than the general biological treatment method because the hydraulic retention time and the sludge age are relatively long, and the suspended organic matter and the dissolved organic matter are simultaneously thoroughly degraded. Therefore, the activated sludge has been highly stabilized in the system, so The remaining activated sludge only needs to be concentrated and dehydrated to save the sludge digestion tank. Simplification of the process reduces floor space, saves capital investment, and facilitates operational management.
Investment model: bot mode, realize the market-oriented allocation of public resources and the transformation of resources into capital, and minimize the risk of construction and operation of government public welfare environmental protection projects.
2. Understand the scale and flat and vertical layout of the wastewater treatment plant.
The scale of the sewage treatment plant: the total scale is 100,000 t/d, and the first phase of the project is 50,000 t/d.
3. Understand the sewage composition of the sewage treatment plant and the water quality, processing capacity, treatment level, treatment efficiency, sewage treatment and sludge disposal process and structure selection.
4. Familiar with and understand the form and construction of various structures, basic design parameters, operation methods and operational management are indeed various control indicators.
Primary processing part:
1) Pump house: grid design size, grid spacing and section shape, grid inclination angle, inter-gate flow rate, interception of dirt and dirt removal method; pool form, size and volume; pump room form, plane Arrangement, main process size, pump and motor selection, pump start-up mode, pipe diameter and elevation arrangement of inlet and outlet pipes.
2) Grit chamber: type, structure, design flow rate, design flow rate, popular time, sedimentation standard, and sand discharge method of grit chamber. A swirling grit chamber is used.
Secondary processing part:
1) Biochemical treatment tank: type, working principle, structure and process size of the biochemical treatment tank, design parameters and operating parameters, aeration form (air supply, diffusion device and oxygen transfer rate, microporous aerator
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