Circulating water system for air separation device

Abstract

The utility model provides a circulating water system for an air separation unit, and relates to the technical field of circulating water system arrangement, the circulating water system comprises a plurality of groups of cooling towers arranged in parallel and a reservoir connected with the cooling towers through pipelines, and the reservoir is connected with a cooling water inlet of water equipment through a water conveying pipeline so as to convey cooling water. The cooling tower is connected with a cooling water outlet of the water using device through a water return pipeline so as to cool flowing-out cooling water and convey the cooling water into the water storage pool, a circulating water pump is arranged on the water conveying pipeline, and the water conveying pipeline between the circulating water pump and the water using device is connected with the water storage pool through a liquid medicine circulating pipeline. The liquid medicine circulating pipeline is sequentially provided with a first valve and a medicine adding device in the direction that water flows back to the reservoir, when the medicine adding device is used for adding medicine, cooling water in the reservoir can continuously circulate in the reservoir, the medicine adding device and the liquid medicine circulating pipeline through the circulating water pump, the uniform mixing efficiency of liquid medicine and water is improved, the efficiency of the water treatment system is improved, and the service life of the water treatment system is prolonged. The operation cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of circulating water system layout, and in particular to a circulating water system for an air separation unit. Background Art

[0002] An air separation unit is a set of industrial equipment used to separate the various components of air and produce oxygen, nitrogen, argon and other gases. The circulating water used in the air separation unit needs to be cooled before being recycled.

[0003] Chinese patent publication number CN215765987U discloses a circulating water system for an air separation unit, including a circulating water system body for circulating cooling water used in the air separation unit, the circulating water system body including multiple cooling towers arranged in parallel and a water reservoir connected to the cooling tower pipes, the water reservoir being connected to the cooling water inlet of the water-using equipment through a circulation pipeline to transport cooling water, the cooling tower being connected to the cooling water outlet of the water-using equipment to cool the outflowing cooling water and transport it to the water reservoir; the water reservoir is equipped with an automatic dosing device, the water reservoir and the cooling tower are connected to the water supply pipe through a liquid level detection module and water is replenished respectively when the liquid level in the water reservoir or the cooling tower is insufficient, and a reserved water supply port is provided on the water supply pipe.

[0004] However, after the automatic dosing device of the above system adds chemicals to the water reservoir, it can only rely on the automatic diffusion and mixing of the chemicals in the water, which reduces the efficiency of the water treatment system and increases the operating costs. Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a circulating water system for an air separation unit, which can solve the technical problems raised by the background technology.

[0006] An embodiment of the present application provides a circulating water system for an air separation unit, comprising a plurality of cooling towers arranged in parallel and a water reservoir connected to the cooling tower pipes, wherein the water reservoir is connected to the cooling water inlet of the water-using equipment through a water supply pipeline to transport cooling water, and the cooling tower is connected to the cooling water outlet of the water-using equipment through a return water pipeline to cool the outflowing cooling water and transport it to the water reservoir, a circulating water pump is provided on the water supply pipeline, the water supply pipeline between the circulating water pump and the water-using equipment is connected to the water reservoir through a liquid medicine circulation pipeline, the liquid medicine circulation pipeline is sequentially provided with a first valve and a dosing device along the direction of water flow back to the water reservoir, and a water supply pipeline is connected to the water supply pipeline between the liquid medicine circulation pipeline and the water-using equipment.

[0007] Furthermore, two circulating water pumps are provided, and the two circulating water pumps are arranged in parallel, and the liquid medicine circulation pipeline, the water supply pipeline and the water delivery pipeline between the two circulating water pumps are connected.

[0008] Furthermore, the water reservoir is connected to a water supply pipeline, and the water supply pipeline is connected to a water supply valve.

[0009] Furthermore, the water supply pipeline is provided with a first pressure gauge, a first thermometer and a flow meter, and the return water pipeline is provided with a second pressure gauge and a second thermometer.

[0010] Furthermore, it also includes a filter pipeline, one end of which is connected to the return pipeline, and the other end of which is connected to the water reservoir, and a sand filter is provided in parallel on the filter pipeline.

[0011] Furthermore, the return water pipeline is connected to a spare pipe, and a reserved valve is provided on the spare pipe.

[0012] Furthermore, a water supply valve is provided on the water supply pipeline.

[0013] Beneficial effects of the utility model:

[0014] Compared with the prior art, the utility model connects the water delivery pipeline between the circulating water pump and the water-using equipment to the water reservoir through the liquid medicine circulation pipeline; the liquid medicine circulation pipeline is provided with a first valve and a dosing device in sequence along the direction of water flow back to the water reservoir; the water delivery pipeline between the liquid medicine circulation pipeline and the water-using equipment is connected with a water supply pipeline; when the dosing device is used to add medicine, the cooling water in the water reservoir can be continuously circulated in the water reservoir, the dosing device and the liquid medicine circulation pipeline through the circulating water pump; the circulating water pump can increase the flow of cooling water in the water reservoir, improve the mixing efficiency of the liquid medicine and water, improve the efficiency of the water treatment system and reduce the operating cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a system structure diagram in some embodiments of the present application;

[0017] The reference numerals are:

[0018] 1. Cooling tower; 2. Water reservoir; 3. Water supply pipeline; 4. Return pipeline; 5. Circulating water pump; 6. Liquid circulation pipeline; 7. First valve; 8. Dosing device; 9. Water supply pipeline; 10. Make-up water pipeline; 11. Make-up water valve; 12. First pressure gauge; 13. First thermometer; 14. Flow meter; 15. Second pressure gauge; 16. Second thermometer; 17. Filter pipeline; 18. Sand and gravel filter; 19. Spare pipe; 20. Reserve valve; 21. Water supply valve; 22. Water-using equipment. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0022] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0024] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. Specific embodiment:

[0026] like Figure 1 As shown, the present application provides a circulating water system for an air separation device, comprising a plurality of cooling towers 1 arranged in parallel and a water reservoir 2 connected to the cooling tower 1 by pipes. In this embodiment, three cooling towers 1 are provided, and the water reservoir 2 is connected to the cooling water inlet of the water-using equipment 22 through a water delivery pipe 3 to deliver cooling water. The cooling tower 1 is connected to the cooling water outlet of the water-using equipment 22 through a return water pipe 4 to cool the outflowing cooling water and deliver it to the water reservoir 2. Specifically, four water-using equipment 22 are provided, and the four water-using equipment 22 are arranged in parallel. A circulating water pump 5 is provided on the water delivery pipe 3, and the circulating water pump 5 is connected to the water-using equipment The water supply pipeline 3 between the equipment 22 is connected to the water reservoir 2 through the liquid medicine circulation pipeline 6. The liquid medicine circulation pipeline 6 is provided with a first valve 7 and a dosing device 8 in sequence along the direction of water flow back to the water reservoir 2. The water supply pipeline 3 between the liquid medicine circulation pipeline 6 and the water-using equipment 22 is connected with a water supply pipeline 9. When the dosing device 8 is used for dosing, the cooling water in the water reservoir 2 can be continuously circulated in the water reservoir 2, the dosing device 8 and the liquid medicine circulation pipeline 6 through the circulating water pump 5. The circulating water pump 5 can increase the flow of cooling water in the water reservoir 2, improve the mixing efficiency of the liquid medicine and water, improve the efficiency of the water treatment system, and reduce the operating cost.

[0027] like Figure 1 As shown, two circulating water pumps 5 are provided, and the two circulating water pumps 5 are arranged in parallel. The liquid medicine circulation pipeline 6 and the water supply pipeline 9 are connected to the water delivery pipeline 3 between the two circulating water pumps 5. Specifically, valves are provided on both sides of the water pumps, which can put one of the circulating water pumps 5 in a standby state. When one circulating water pump 5 fails, the valves on both sides of the circulating water pump 5 are closed, and the valves on both sides of the other circulating water pump are opened. The failed circulating water pump 5 can be replaced without affecting the operation of the entire process.

[0028] like Figure 1 As shown, the water reservoir 2 is connected to a water supply pipeline 10, and the water supply pipeline 10 is connected to a water supply valve 11. By opening the water supply valve 11, external water source can be used to supply water to the water reservoir 2 through the water supply pipeline 10 to replenish the water consumed in the circulating water system.

[0029] like Figure 1As shown, the water supply pipeline 3 is provided with a first pressure gauge 12 , a first thermometer 13 and a flow meter 14 , and the return water pipeline 4 is provided with a second pressure gauge 15 and a second thermometer 16 .

[0030] like Figure 1 As shown, it also includes a filter pipeline 17, one end of the filter pipeline 17 is connected to the return water pipeline 4, and the other end of the filter pipeline 17 is connected to the water reservoir 2. A sand and gravel filter 18 is provided in parallel on the filter pipeline 17. Specifically, a corresponding valve is provided on the filter pipeline 17, and a corresponding valve is also provided on the pipeline of the cooling tower 1. The sand and gravel filter 18 is filled with sand and gravel, and the solid particles in the water are intercepted and filtered through the sand and gravel layer, thereby improving the water quality of the circulating water and ensuring the normal operation of the circulating water system. Among them, by controlling the valve on the filter pipeline 17 and the valve on the pipeline of the cooling tower 1, the flow direction of the water can be controlled according to actual needs so as to cool or filter the return water.

[0031] like Figure 1 As shown, the return pipe 4 is connected to a spare pipe 19 , and a reserve valve 20 is provided on the spare pipe 19 . The setting of the reserve valve 20 can provide conditions for subsequent expansion of the pipeline system.

[0032] like Figure 1 As shown, a water supply valve 21 is provided on the water supply pipe 9. When the water supply valve 21 is opened, cooling water can be supplied to the water delivery pipe 3 through the water supply pipe 9.

[0033] Working principle:

[0034] Initially, cooling water is input into the water delivery pipeline 3 through the water supply pipeline 9, and the cooling water flows through the water-using equipment 22 to cool the water-using equipment 22, making full use of the cooling performance of the first cooling water and saving energy. By controlling the valve on the filter pipeline 17 and the valve on the cooling tower 1 pipeline, the flow direction of the water can be controlled according to actual needs so as to cool or filter the return water. After the cooling water returns to the water reservoir 2, the subsequent circulation is powered by the circulating water pump 5. Among them, when the dosing device 8 is used for dosing, the cooling water in the water reservoir 2 can be continuously circulated in the water reservoir 2, the dosing device 8 and the liquid medicine circulation pipeline 6 through the circulating water pump 5. The circulating water pump 5 can increase the flow of cooling water in the water reservoir 2, improve the mixing efficiency of the liquid medicine and water, improve the efficiency of the water treatment system, and reduce operating costs.

[0035] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A circulating water system for an air separation unit, characterized by: It includes multiple cooling towers arranged in parallel and a water reservoir connected to the cooling tower pipelines. The water reservoir is connected to the cooling water inlet of the water-using equipment through a water supply pipeline to transport cooling water. The cooling tower is connected to the cooling water outlet of the water-using equipment through a return water pipeline to cool the outflowing cooling water and transport it to the water reservoir. A circulating water pump is provided on the water supply pipeline. The water supply pipeline between the circulating water pump and the water-using equipment is connected to the water reservoir through a liquid medicine circulation pipeline. The liquid medicine circulation pipeline is sequentially provided with a first valve and a dosing device along the direction of water flow back to the water reservoir. A water supply pipeline is connected to the water supply pipeline between the liquid medicine circulation pipeline and the water-using equipment.

2. A circulating water system for an air separation unit according to claim 1, characterized in that: There are two circulating water pumps, which are arranged in parallel. The liquid medicine circulation pipeline, the water supply pipeline and the water delivery pipeline between the two circulating water pumps are connected.

3. The circulating water system for an air separation unit according to claim 1, characterized in that: The water reservoir is connected to a water supply pipeline, and the water supply pipeline is connected to a water supply valve.

4. The circulating water system for an air separation unit according to claim 1, characterized in that: The water supply pipeline is provided with a first pressure gauge, a first thermometer and a flow meter, and the return water pipeline is provided with a second pressure gauge and a second thermometer.

5. The circulating water system for an air separation unit according to claim 1, characterized in that: It also includes a filter pipeline, one end of which is connected to the return water pipeline, and the other end of which is connected to the water reservoir. A sand filter is provided in parallel on the filter pipeline.

6. The circulating water system for an air separation unit according to claim 1, characterized in that: The return water pipeline is connected with a spare pipe, and the spare pipe is provided with a reserved valve.

7. The circulating water system for an air separation unit according to claim 1, characterized in that: A water supply valve is provided on the water supply pipeline.

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