Large refrigerated water station for chemical plant

Abstract

The application provides a large refrigerated water station for a chemical device, which comprises an ice machine plant, an integrated frame, a refrigerated water tank area and a refrigerant evaporation unit, the integrated frame is arranged between the ice machine plant and the refrigerant evaporation unit, the integrated frame comprises, from top to bottom, a cascade air cooler group, a cascade water pool, a pipe gallery and a cascade water circulating pump, the cascade air cooler group and the cascade water pool are vertically projected and overlapped, two groups of pipe groups are symmetrically arranged on the pipe gallery, each pipe group comprises, from inside to outside, a liquid-phase refrigerant pipe, a cascade water pipe and a gas-phase refrigerant pipe, the gas-phase refrigerant pipe is communicated with the ice machine plant and the cascade air cooler group, the liquid-phase refrigerant pipe is communicated with the cascade air cooler group and the refrigerant evaporation unit, and the cascade water pipe is communicated with the cascade water circulating pump and the cascade air cooler group. The application has the beneficial effects of realizing safe, economic and reliable operation of a process flow, small occupation of land and convenient operation, inspection and maintenance.

Description

Technical Field

[0001] This invention belongs to the field of chemical engineering technology development and engineering design, and in particular relates to a large-scale chilled water station for chemical plants. Background Technology

[0002] With the increasing scale and integration of chemical plants, chilled water stations, which provide cooling capacity for various devices within the plant, are also moving towards large-scale, integrated, and even modular design, manufacturing, transportation, and installation. Traditional chilled water station designs typically consist of multiple electrically driven small units arranged together, resulting in drawbacks such as a large number of units, limited refrigerant selection, high initial investment and operating costs, and large floor space requirements. Although some large chemical plants have recently attempted technological innovations in large-scale, integrated chilled water stations, various bottlenecks remain, including large equipment footprint, high operating costs, high failure rates, and inconvenient maintenance. This necessitates the invention of a large-scale chilled water station for chemical plants to adapt to this development trend and overcome existing shortcomings. The recent maturation of technologies such as large-scale ice machines, spray-type air coolers, and refrigerant evaporators has enabled breakthroughs in this invention, allowing for successful engineering implementation.

[0003] In the engineering design of large-scale chilled water stations in chemical plants, the chilled water system is designed to improve the cooling effect of the refrigerant air cooler. The chilled water tank and its circulating piping system are critical facilities. The layout of the gas-phase refrigerant piping system is crucial, as it directly affects the pipe resistance drop and the operating performance of the chilled air cooler unit. Currently, there are few literature reports and engineering practice explorations on this aspect of piping design. Summary of the Invention

[0004] In view of this, the present invention aims to provide a large-scale chilled water station for chemical plants to solve the problems mentioned in the background art, such as the large number of chilled water station devices, the single choice of refrigerant, the high initial investment and operating costs, and the large footprint.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] A large-scale chilled water station for a chemical plant includes an ice machine workshop, an integrated frame, a chilled water tank area, and a refrigerant evaporation unit. The integrated frame is located between the ice machine workshop and the refrigerant evaporation unit, and is connected to the refrigerant evaporation unit. The refrigerant evaporation unit is connected to the ice machine workshop, and the chilled water tank area is connected to the refrigerant evaporation unit. From top to bottom, the integrated frame includes a jet-type air cooler assembly, a jet-type water tank, a pipe gallery, and a jet-type water circulation pump. The jet-type air cooler assembly and the jet-type water tank have their vertical projections overlapping. The outlet of the jet-type water tank is connected to the input of the jet-type water circulation pump. The output end of the water circulation pump is connected to the inlet of the spray-type air cooler group. Two sets of pipe groups are symmetrically arranged on the pipe rack. Each set of pipe groups includes a liquid phase refrigerant pipe, a spray water pipe, and a gas phase refrigerant pipe arranged sequentially from the inside to the outside. The inlet of the gas phase refrigerant pipe is connected to the ice machine factory building. The outlet of the gas phase refrigerant pipe is connected to the gas phase refrigerant inlet of the spray-type air cooler group. The inlet of the liquid phase refrigerant pipe is connected to the liquid phase refrigerant outlet of the spray-type air cooler group. The outlet of the liquid phase refrigerant pipe is connected to the refrigerant evaporation unit. The inlet of the spray water pipe is connected to the output end of the spray water circulation pump. The outlet of the spray water pipe is connected to the inlet of the spray-type air cooler group.

[0007] Furthermore, a filter is provided between the irradiation pool and the irradiation water circulation pump. The filter inlet is connected to the outlet of the irradiation pool. The filter outlet is connected to the input end of the irradiation water circulation pump in sequence through the pool bottom outlet pipe, the pipe flexible connection, and the L-shaped pipe. The irradiation pool is fixedly connected to a pipe suspension bracket for fixing the pool bottom outlet pipe. The L-shaped pipe is equipped with a pipe ground support and a pipe drain.

[0008] Furthermore, the ice machine factory includes an ice machine, which is provided with a first gaseous refrigerant inlet and a first gaseous refrigerant outlet. The first gaseous refrigerant inlet is connected to a refrigerant evaporation unit, and the first gaseous refrigerant outlet is connected to a gaseous refrigerant pipe inlet.

[0009] Furthermore, the refrigerant evaporation unit includes a refrigerant economizer, and the ice machine is provided with a second gaseous refrigerant inlet and a second gaseous refrigerant outlet. The second gaseous refrigerant inlet and the second gaseous refrigerant outlet are located between the first gaseous refrigerant inlet and the first gaseous refrigerant outlet. The second gaseous refrigerant outlet is connected to the refrigerant economizer inlet, and the refrigerant economizer outlet is connected to the second gaseous refrigerant inlet.

[0010] Furthermore, the chilled water tank area includes a chilled water pump and a pressure stabilizing mechanism. The input end of the chilled water pump is connected to a chilled water return pipe, and the output end of the chilled water pump is connected to a refrigerant evaporation unit. The pressure stabilizing mechanism includes a chilled water storage tank, a chilled water tower, and a chilled water circulation pump. The chilled water storage tank is connected to the output end of the chilled water circulation pump, the output end of the chilled water circulation pump is connected to a cooling water tower, and the cooling water tower is connected to the cooling water pump.

[0011] Furthermore, the refrigerant evaporation unit includes a refrigerant buffer tank, a refrigerant evaporator, and an ice machine inlet buffer tank. The liquid refrigerant inlet of the refrigerant buffer tank is connected to the liquid refrigerant pipe outlet. The liquid refrigerant outlet of the refrigerant buffer tank is connected to the refrigerant evaporator. The refrigerant evaporator is connected to the ice machine inlet buffer tank. The ice machine inlet buffer tank is connected to the ice machine. The refrigerant evaporator is connected to a chilled water supply pipe.

[0012] Furthermore, the refrigerant evaporation unit is installed outdoors, and the refrigerant evaporator is inspected and pulled outwards.

[0013] Compared with existing technologies, the large-scale chilled water station for chemical plants described in this invention has the following advantages:

[0014] (1) The four core functional blocks of the large-scale chilled water station for chemical plants described in this invention are compact and reasonable. Each functional block can be set up as one or more sets as needed, which is in line with the development trend of this field. While achieving safe, economical and reliable operation of the process flow, it also achieves the effects of small footprint and convenient operation and maintenance, and lays a good technical foundation for modular design and installation.

[0015] (2) The integrated framework described in this invention has a high degree of integration and smooth process operation, enabling modular design, manufacturing, transportation, and installation to meet engineering development needs. The suspended design of the quenching water tank effectively utilizes the water tank's elevation difference for energy saving while significantly reducing land area, investment, and operating costs. It also allows for diverse structural designs of the water tank. The symmetrical and balanced distributed arrangement of the liquid-phase refrigerant pipes, quenching water pipes, and gas-phase refrigerant pipes ensures the operating efficiency of the quenching air cooler unit.

[0016] (3) The integrated frame pipeline system design described in this invention has the shortest pipeline length from the quenching water tank to the quenching water circulation pump, which can significantly reduce pipeline investment and quenching water circulation pump selection investment. At the same time, it can increase the effective volume of the quenching water tank and facilitate actual maintenance operations such as quenching water drainage.

[0017] (4) The ice machine described in this invention can be driven by a variety of methods and the refrigerant can be selected in a variety of ways.

[0018] (5) The chilled water tank area described in this invention is safe and efficient.

[0019] (6) The refrigerant evaporation unit described in this invention operates smoothly and can meet the engineering development needs of modular design, manufacturing, transportation and installation. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 This is a schematic plan view of a large-scale chilled water station for a chemical plant according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the front of a large-scale chilled water pump for a chemical plant according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the pipeline layout for a large-scale chilled water station used in a chemical plant, as described in an embodiment of the present invention.

[0024] Figure 4 This is a schematic plan view of the spray water circulation system according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic elevation view of the spray water circulation system according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the flow direction of the piping system of the spray-type air cooler group according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the piping system layout of the air-cooled unit according to an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Ice machine plant; 2. Integrated frame; 3. Chilled water tank area; 4. Refrigerant evaporation unit; 5. Ice machine; 6. Spray-type air cooler unit; 7. Spray water tank; 8. Spray water circulation pump; 9. Chilled water storage tank; 10. Chilled water pump; 11. Chilled water tower; 12. Chilled water circulation pump; 13. Refrigerant buffer tank; 14. Refrigerant evaporator; 15. Ice machine inlet buffer tank; 16. Refrigerant economizer; 17. Refrigerant piping system; 18. Spray water piping system; 19. Chilled water piping system; 20. Filter; 21. Tank bottom outlet pipe; 22. Pipe suspension support; 23. Pipe flexible connection; 24. L-shaped pipe; 25. Pipe ground support; 26. Pipe draining; 27. Gas phase refrigerant pipe; 28. Spray water pipe; 29. ​​Liquid phase refrigerant pipe. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0031] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] like Figure 1-7 As shown, a large-scale chilled water station for a chemical plant according to the present invention includes an ice machine workshop 1, an integrated frame 2, a chilled water tank area 3, and a refrigerant evaporation unit 4. The integrated frame 2 is located between the ice machine workshop 1 and the refrigerant evaporation unit 4. The ice machine workshop 1 is connected to the integrated frame 2, the integrated frame 2 is connected to the refrigerant evaporation unit 4, the refrigerant evaporation unit 4 is connected to the ice machine workshop 1, and the chilled water tank area 3 is connected to the refrigerant evaporation unit 4. The integrated frame 2 includes, from top to bottom, a jet-type air cooler group 6, a jet-type water tank 7, a pipe gallery, and a jet-type water circulation pump 8. The jet-type air cooler group 6 and the jet-type water tank 7 have their vertical projections overlapping. The outlet of the jet-type water tank 7 is connected to the jet-type water circulation pump 8. The inlet is connected to the outlet of the blast water circulation pump 8, which is connected to the inlet of the blast air cooler group 6. Two sets of pipe groups are symmetrically arranged on the pipe rack. Each pipe group includes, from the inside out, a liquid refrigerant pipe 29, a blast water pipe 28, and a gaseous refrigerant pipe 27. The inlet of the gaseous refrigerant pipe 27 is connected to the ice machine workshop 1, and the outlet of the gaseous refrigerant pipe 27 is connected to the gaseous refrigerant inlet of the blast air cooler group 6. The inlet of the liquid refrigerant pipe 29 is connected to the liquid refrigerant outlet of the blast air cooler group 6, and the outlet of the liquid refrigerant pipe 29 is connected to the refrigerant evaporation unit 4. The inlet of the blast water pipe 28 is connected to the outlet of the blast water circulation pump 8, and the outlet of the blast water pipe 28 is connected to the inlet of the blast air cooler group 6. The integrated frame 2 also includes stairs and an operating platform.

[0033] A filter 20 is installed between the quenching water tank 7 and the quenching water circulation pump 8. The inlet of the filter 20 is connected to the outlet of the quenching water tank 7, and the outlet of the filter 20 is set downwards. The outlet of the filter 20 is connected to the input end of the quenching water circulation pump 8 through the bottom outlet pipe 21, the flexible pipe connection 23, and the L-shaped pipe 24 in sequence. The quenching water tank 7 is fixedly connected to a pipe suspension bracket 22 to fix the bottom outlet pipe 21. The L-shaped pipe 24 is equipped with a pipe ground support 25 and a pipe drain 26. With this design, the quenching water circulation system has the shortest pipe length from the quenching water tank 7 to the quenching water circulation pump 8, which can significantly reduce the investment in pipes and the selection investment of the quenching water circulation pump 8. At the same time, it can increase the effective volume of the quenching water tank 7 and facilitate the actual maintenance and inspection needs such as quenching water draining. A filter 20 is installed at the bottom outlet of the pool to filter out impurities from the pipeline system; the bottom outlet pipe 21 is supported by a pipe suspension bracket 22 and is firmly connected to the bottom of the pool. To prevent the vibration and displacement generated by the L-shaped pipe 24 from acting on the irradiated water pool 7, a flexible pipe connection 23 is used to connect the bottom outlet pipe 21 and the L-shaped pipe 24; the L-shaped pipe 24 is connected to the irradiated water circulation pump 8 on the ground and is supported by a pipe ground bracket 25. A pipe drain 26 is installed at the lowest point of the L-shaped pipe 24 for maintenance and other operational needs.

[0034] The ice machine plant 1 includes an ice machine 5, an oil station, and a maintenance crane. The ice machine 5 is equipped with a first gaseous refrigerant inlet and a first gaseous refrigerant outlet. The first gaseous refrigerant inlet is connected to the refrigerant evaporation unit 4, and the first gaseous refrigerant outlet is connected to the inlet of the gaseous refrigerant pipe 27.

[0035] The refrigerant evaporation unit 4 includes a refrigerant economizer 16. The ice machine 5 is provided with a second gaseous refrigerant inlet and a second gaseous refrigerant outlet. The second gaseous refrigerant inlet and the second gaseous refrigerant outlet are located between the first gaseous refrigerant inlet and the first gaseous refrigerant outlet. The second gaseous refrigerant outlet is connected to the inlet of the refrigerant economizer 16, and the outlet of the refrigerant economizer 16 is connected to the second gaseous refrigerant inlet.

[0036] Chilled water tank area 3 includes a chilled water pump 10 and a pressure stabilizing mechanism. The input end of chilled water pump 10 is connected to a chilled water return pipe buried outside the boundary area, and the output end of chilled water pump 10 is connected to the refrigerant evaporation unit 4. The pressure stabilizing mechanism includes a chilled water storage tank 9, a chilled water tower 11, and a chilled water circulation pump 12. The chilled water tower 11 is arranged close to the chilled water tank. The chilled water storage tank 9 is connected to the output end of the chilled water circulation pump 12, and the output end of the chilled water circulation pump 12 is connected to the cooling water tower. The cooling water tower is connected to the cooling water pump. Chilled water tank area 3 also includes a chilled water pump 10 inlet and outlet pipe gallery. The chilled water pump 10 inlet and outlet pipe gallery is arranged close to the integrated frame 2. The chilled water pump 10 output pipe passes through the chilled water pump 10 inlet and outlet pipe gallery and the integrated frame 2 gallery in sequence to connect to the refrigerant evaporation unit 4.

[0037] The refrigerant evaporation unit 4 includes a refrigerant buffer tank 13, a refrigerant evaporator 14, and an ice machine inlet buffer tank 15. The liquid refrigerant inlet of the refrigerant buffer tank 13 is connected to the outlet of the liquid refrigerant pipe 29. The liquid refrigerant outlet of the refrigerant buffer tank 13 is connected to the refrigerant evaporator 14. The refrigerant evaporator 14 is connected to the ice machine inlet buffer tank 15. The ice machine inlet buffer tank 15 is connected to the ice machine 5. The refrigerant evaporator 14 is connected to the buried chilled water supply pipe outside the bounded area.

[0038] The refrigerant evaporation unit 4 is set up outdoors, and the refrigerant evaporator 14 is inspected and pulled outwards.

[0039] A refrigerant piping system 17 is formed by connecting the ice machine 5, refrigerant economizer 16, ice machine 5, blast air cooler group 6, refrigerant buffer tank 13, refrigerant evaporator 14, ice machine 5 inlet buffer tank, and ice machine 5 in sequence via piping. A blast water piping system 18 is formed by connecting the blast water tank 7, blast water circulation pump 8, and blast air cooler group 6 in sequence via piping. A chilled water piping system 19 is formed by connecting the chilled water pump 10 and refrigerant evaporator 14 in sequence via piping; and by connecting the chilled water storage tank 9, chilled water circulation pump 12, chilled water tower 11, chilled water pump 10, and refrigerant evaporator 14 in sequence via piping.

[0040] 27 gaseous refrigerant pipes from the ice machine 5 are symmetrically and evenly distributed upwards along the pipe rack to connect to the spray-type air cooler group 6. The liquid refrigerant produced by the spray-type air cooler group 6 flows downwards by gravity to converge into the main pipe of the pipe rack, and then connects to the refrigerant evaporation unit 4. The inlet pipe of the spray water circulation pump 8 is connected from below the spray water tank 7, and its outlet pipe is symmetrically and evenly distributed upwards along the pipe rack to connect to the spray-type air cooler group 6. The piping system design minimizes the pipe length from the spray water tank 7 to the spray water circulation pump 8, which can significantly reduce the investment in piping and the selection investment of the spray water circulation pump 8. At the same time, it can increase the effective volume of the spray water tank 7 and facilitate the actual maintenance and operation needs such as spray water drainage. The symmetrical and evenly distributed arrangement of the 28 spray water pipes and 27 gaseous refrigerant pipes of the spray-type air cooler system 17 ensures the operating efficiency of the spray-type air cooler group 6.

[0041] The working principle of this invention is to integrate the four core functional blocks (ice machine plant 1, integrated frame 2, chilled water tank area 3, and refrigerant evaporation unit 4) and key pipelines into a system that achieves efficient refrigerant evaporation heat exchange and refrigeration, refrigerant compression, and the circulation of chilled water supply and return pipelines, continuously providing the required cooling capacity to other devices and users within the entire plant.

Claims

1. A large-scale chilled water station for a chemical plant, characterized in that: The system includes an ice machine factory building, an integrated frame, a chilled water tank area, and a refrigerant evaporation unit. The integrated frame is located between the ice machine factory building and the refrigerant evaporation unit, and is connected to both. The chilled water tank area is also connected to the refrigerant evaporation unit. From top to bottom, the integrated frame includes a jet-type air cooler assembly, a jet-type water tank, a pipe gallery, and a jet-type water circulation pump. The jet-type air cooler assembly and the jet-type water tank have their vertical projections overlapping. The outlet of the jet-type water tank is connected to the input of the jet-type water circulation pump, and the output of the jet-type water circulation pump is connected to the outlet of the jet-type water circulation pump. The system is connected to the inlet of the spray-type air cooler group. Two sets of pipe groups are symmetrically arranged on the pipe rack. Each set of pipe groups includes a liquid refrigerant pipe, a spray water pipe, and a gaseous refrigerant pipe arranged sequentially from the inside to the outside. The inlet of the gaseous refrigerant pipe is connected to the ice machine factory building. The outlet of the gaseous refrigerant pipe is connected to the gaseous refrigerant inlet of the spray-type air cooler group. The inlet of the liquid refrigerant pipe is connected to the liquid refrigerant outlet of the spray-type air cooler group. The outlet of the liquid refrigerant pipe is connected to the refrigerant evaporation unit. The inlet of the spray water pipe is connected to the output end of the spray water circulation pump. The outlet of the spray water pipe is connected to the inlet of the spray-type air cooler group. The ice machine factory includes an ice machine, which is provided with a first gaseous refrigerant inlet and a first gaseous refrigerant outlet. The first gaseous refrigerant inlet is connected to a refrigerant evaporation unit, and the first gaseous refrigerant outlet is connected to a gaseous refrigerant pipe inlet. The refrigerant evaporation unit includes a refrigerant economizer. The ice machine is provided with a second gaseous refrigerant inlet and a second gaseous refrigerant outlet. The second gaseous refrigerant inlet and the second gaseous refrigerant outlet are located between the first gaseous refrigerant inlet and the first gaseous refrigerant outlet. The second gaseous refrigerant outlet is connected to the refrigerant economizer inlet, and the refrigerant economizer outlet is connected to the second gaseous refrigerant inlet. The refrigerant evaporation unit includes a refrigerant buffer tank, a refrigerant evaporator, and an ice machine inlet buffer tank. The liquid refrigerant inlet of the refrigerant buffer tank is connected to the liquid refrigerant pipe outlet. The liquid refrigerant outlet of the refrigerant buffer tank is connected to the refrigerant evaporator. The refrigerant evaporator is connected to the ice machine inlet buffer tank. The ice machine inlet buffer tank is connected to the ice machine. The refrigerant evaporator is connected to a chilled water supply pipe.

2. A large-scale chilled water station for a chemical plant according to claim 1, characterized in that: A filter is provided between the irradiation pool and the irradiation water circulation pump. The filter inlet is connected to the outlet of the irradiation pool. The filter outlet is connected to the input end of the irradiation water circulation pump in sequence through the bottom outlet pipe, the flexible pipe connection, and the L-shaped pipe. The irradiation pool is fixedly connected to a pipe suspension bracket for fixing the bottom outlet pipe. The L-shaped pipe is equipped with a pipe ground support and a pipe drain.

3. A large-scale chilled water station for a chemical plant according to claim 1, characterized in that: The chilled water tank area includes a chilled water pump and a pressure stabilizing mechanism. The input end of the chilled water pump is connected to a chilled water return pipe, and the output end of the chilled water pump is connected to a refrigerant evaporation unit. The pressure stabilizing mechanism includes a chilled water storage tank, a chilled water tower, and a chilled water circulation pump. The chilled water storage tank is connected to the output end of the chilled water circulation pump, the output end of the chilled water circulation pump is connected to the cooling water tower, and the cooling water tower is connected to the cooling water pump.

4. A large-scale chilled water station for a chemical plant according to claim 1, characterized in that: The refrigerant evaporation unit is installed outdoors, and the refrigerant evaporator is inspected and the core is pulled outwards.

Images