Cooling water tower device of sulfuric acid device

Abstract

The invention discloses a cooling water tower device of a sulfuric acid device. The device comprises a phosphoric acid device and a sulfuric acid device, the phosphoric acid device is internally provided with a first cooling water pump, a first cooling tower, a precooler circulating water return tank and a rotating disc type filter, the first cooling tower is communicated with the precooler circulating water return tank through a pipeline, and the first cooling water pump pumps water of the cooling tower into the precooler circulating water return tank; the precooler circulating water return tank conveys industrial water to the rotating disc type filter; a second cooling water pump, a second cooling water tower, a dry acid absorption cooler and a finished product acid cooler are arranged in the sulfuric acid device, industrial water is stored in the second cooling tower, the second cooling tower is connected with the dry acid absorption cooler and the finished product acid cooler through pipelines, and the second cooling tower is further connected with a precooler circulating water return tank through a pipeline; and a second cooling water pump pumps industrial water in the second cooling tower into the dry acid absorption cooler, the finished product acid cooler and the precooler to circulate and return to the water tank.

Description

Technical Field

[0001] The present application relates to the field of phosphating technology, and in particular to a cooling water tower device for a sulfuric acid device. Background Art

[0002] In the sulfuric acid production process, the water in the cooling tower rises from 32°C to 40°C after passing through the sulfuric acid drying acid cooler, finished acid cooler and other heat exchange equipment, and then returns to the cooling tower to reduce the temperature from 40°C to 32°C through convection heat exchange with the air. In this process, due to the continuous evaporation of water, the hardness of the water gradually increases, and then scale is formed on the pipes, fillers, and heat exchange equipment, greatly reducing the heat exchange efficiency.

[0003] At present, the conductivity of water in the circulating water tower is usually reduced by draining water to the sewage station and replenishing fresh water. However, this method has the following disadvantages:

[0004] Limited sewage treatment capacity: During flood season or load-reduced production, the sewage station may not be able to treat the sewage from the cooling tower, resulting in increased water conductivity. Especially during these periods, the water conductivity in the cooling tower can reach up to 8500μS / cm (microSiemens per centimeter), seriously affecting the heat exchange efficiency and normal operation of the system.

[0005] High treatment costs: When the water from the cooling tower is transported to a sewage station for treatment, the treatment cost per ton of water will increase accordingly, which significantly increases the overall operating cost.

[0006] Heat exchanger scaling problem: Increased water conductivity causes scaling of the heat exchanger, which affects the load of the sulfuric acid unit. Regular shutdowns are required to clean the dryer and finished acid cooler, further reducing production efficiency and equipment life. Summary of the invention

[0007] The present application provides a cooling water tower device for a sulfuric acid device, comprising:

[0008] A phosphoric acid device and a sulfuric acid device, wherein the phosphoric acid device is provided with a first cooling water pump, a first cooling tower, a precooler circulating water return tank and a rotary disc filter, the first cooling tower is connected to the precooler circulating water return tank through a pipeline, the first cooling water pump pumps water from the first cooling tower into the precooler circulating water return tank, and the precooler circulating water return tank delivers industrial water to the rotary disc filter;

[0009] The sulfuric acid device is provided with a second cooling water pump, a second cooling water tower, a dry acid absorption cooler and a finished acid cooler. Industrial water is stored in the second cooling tower. The second cooling tower is connected to the dry acid absorption cooler and the finished acid cooler through pipelines, respectively. The second cooling tower is also connected to the precooler circulation return water tank through a pipeline. The second cooling water pump pumps the industrial water in the second cooling tower into the dry acid absorption cooler, the finished acid cooler and the precooler circulation return water tank.

[0010] Optionally, a first valve is provided on a pipeline connecting the second cooling tower and the precooler circulation return water tank, and the first valve is provided on one side of the sulfuric acid device.

[0011] Optionally, a second valve is provided on a pipeline connecting the second cooling tower and the precooler circulation return water tank, and the second valve is provided on one side of the phosphoric acid device.

[0012] Optionally, the finished acid cooler and the dry acid absorption cooler are both provided with a return water pipeline connected to the second cooling tower.

[0013] Optionally, a return tank pump is provided on the pipeline connecting the precooler circulation return tank and the rotary filter.

[0014] Optionally, the rotary disc filter is provided with a first washing zone, a second washing zone, a third washing zone, a feeding zone and a wash plate zone.

[0015] Optionally, the precooler circulation return water tank is provided with a water level sensor for detecting the water level and controlling the start and stop of the first cooling water pump and the second cooling water pump.

[0016] Optionally, the first valve and the second valve are automatically regulating valves, which can automatically adjust their openings according to preset parameters to control the cooling water flow.

[0017] Optionally, the first cooling water pump and the second cooling water pump are variable frequency water pumps, and the pump speed can be adjusted according to system requirements.

[0018] Optionally, a packing layer is provided inside the first cooling tower.

[0019] It can be seen from the above technical solutions that this application has the following advantages:

[0020] 1. By setting up the first cooling tower and the second cooling tower, which are used for cooling the phosphoric acid unit and the sulfuric acid unit respectively, the cooling load is effectively shared and the cooling efficiency of the overall system is improved.

[0021] 2. The cooling water in the sulfuric acid device is transported to the rotary filter through the precooler circulation return tank for filtration treatment, which can effectively remove impurities and calcium and magnesium ions in the water, reduce scaling problems in the dry absorption acid cooler and finished acid cooler, and improve heat exchange efficiency and equipment life.

[0022] 3. The circulating cooling water in the sulfuric acid unit is transported to the precooler of the phosphoric acid unit and then circulated back to the water tank, which realizes the reuse of water resources, reduces the consumption of fresh water, and improves the economic and environmental benefits of the system.

[0023] 4. By reducing the formation of scale, the need for equipment cleaning and maintenance caused by scaling is reduced, and the operation and maintenance costs of the system are reduced. In addition, the rotary disc filter can reduce the cost of sewage treatment, further reducing the overall operating cost.

[0024] 5. By setting up components such as cooling towers, cooling water pumps, and precooler circulation return tanks, the system is ensured to operate stably under high temperature conditions, avoiding equipment damage and shutdown due to overheating, and improving the reliability and stability of the entire device.

[0025] 6. Using circulating cooling water to circulate back to the water tank of the precooler of the phosphoric acid unit not only solves the sewage discharge problem of the sulfuric acid unit, but also reduces the cost and environmental burden of sewage treatment, and improves the environmental friendliness of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of an embodiment of a cooling water tower device for a sulfuric acid device provided in this application. DETAILED DESCRIPTION

[0027] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only used to illustrate the relative positional relationships between the various components or components, and do not particularly limit the specific installation orientations of the various components or components.

[0028] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0029] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In addition, the structures, proportions, sizes, etc. drawn in the drawings in the present application are only used to match the contents disclosed in the specification for the technical personnel in this field to understand and read, and are not used to limit the restrictive conditions under which the present application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present application without affecting the effects and purposes that can be achieved by the present application.

[0031] The following will be combined with the drawings in this application to clearly and completely describe the technical solutions in this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] See also Figure 1 The present application first provides an embodiment of a cooling water tower device for a sulfuric acid device, comprising:

[0033] A phosphoric acid device 01 and a sulfuric acid device 02, wherein the phosphoric acid device 01 is provided with a first cooling water pump 03, a first cooling tower 04, a precooler circulating water return tank 05 and a rotary disc filter 06, wherein the first cooling tower 04 is connected to the precooler circulating water return tank 05 through a pipeline, and the first cooling water pump 03 pumps water from the first cooling tower into the precooler circulating water return tank 05, and the precooler circulating water return tank 05 delivers industrial water to the rotary disc filter 06;

[0034] The sulfuric acid device 02 is provided with a second cooling water pump 07, a second cooling water tower 08, a dry acid absorption cooler 09 and a finished acid cooler 10. Industrial water is stored in the second cooling tower. The second cooling tower is connected to the dry acid absorption cooler and the finished acid cooler 10 through pipelines, respectively. The second cooling tower is also connected to the precooler circulation return tank 05 through a pipeline. The second cooling water pump 07 pumps the industrial water in the second cooling tower into the dry acid absorption cooler, the finished acid cooler 10 and the precooler circulation return tank 05.

[0035] This application first provides an embodiment of a cooling water tower device for a sulfuric acid plant 02, aiming to optimize the recycling of cooling water, reduce equipment scaling, save water and reduce operating costs. The specific description is as follows:

[0036] The first cooling water pump 03 is responsible for pumping the water from the cooling tower into the precooler and circulating it back to the water tank 05 to ensure the flow of cooling water.

[0037] The first cooling tower 04 is connected to the precooler circulation return tank 05 through a pipeline, and is used to cool the industrial water returned from the return tank to reduce its temperature.

[0038] Precooler circulation return water tank 05: receives cooling water from the first cooling water pump 03 and delivers industrial water to the rotary disc filter 06.

[0039] Rotary disc filter 06: Used to filter impurities and calcium and magnesium ions in industrial water, prevent equipment scaling, and ensure the quality of cooling water.

[0040] Sulfuric acid plant 02:

[0041] The second cooling water pump 07: pumps the industrial water in the second cooling tower into the dry acid absorption cooler, the finished acid cooler 10 and the precooler and circulates back to the water tank 05.

[0042] The second cooling tower: stores industrial water and is connected to the dry acid absorption cooler, the finished acid cooler 10 and the pre-cooler circulation return water tank 05 through pipelines to ensure the circulation and temperature regulation of cooling water.

[0043] Dry absorption acid cooler: used to cool the dry absorption acid in the sulfuric acid unit 02 and reduce its temperature by cooling water.

[0044] Finished acid cooler 10: used to cool the finished acid to ensure that it is stored and transported at an appropriate temperature.

[0045] How it works

[0046] Phosphoric acid unit 01 cooling water circulation:

[0047] The first cooling water pump 03 pumps the water in the first cooling tower 04 into the precooler circulation return water tank 05. The water in the precooler circulation return water tank 05 is transported to the rotary disc filter 06 through a pipeline.

[0048] The rotary disc filter 06 filters the water to remove impurities and calcium and magnesium ions. The treated industrial water is then returned to the precooler circulation tank 05 for continued circulation cooling.

[0049] Sulfuric acid unit 02 cooling water circulation:

[0050] The second cooling water pump 07 pumps the industrial water in the second cooling tower into the dry absorption acid cooler and the finished acid cooler 10 for cooling the acid in these devices.

[0051] At the same time, the industrial water in the second cooling tower is also connected to the precooler circulation return tank 05 through a pipeline, so that part of the cooling water can be guided to the precooler circulation return tank 05 in the phosphoric acid device 01, realizing the recycling of water resources across devices.

[0052] Water use across installations:

[0053] After circulating cooling, part of the cooling water in the sulfuric acid device 02 is guided to the precooler circulation return water tank 05 of the phosphoric acid device 01, and the water quality is treated by the rotary filter 06.

[0054] The treated cooling water can be pumped back to the second cooling tower and continue to be used for cooling the sulfuric acid unit 02, forming an efficient closed-loop cooling water circulation system.

[0055] Through the above-mentioned design and improvement, this embodiment provides a highly efficient, energy-saving and environmentally friendly cooling water tower device for sulfuric acid device 02, which has broad application prospects and significant economic benefits in industrial production.

[0056] In an optional embodiment, a first valve 11 is provided on a pipeline connecting the second cooling tower and the precooler circulation return water tank 05 , and the first valve 11 is provided on one side of the sulfuric acid device 02 .

[0057] Structural composition

[0058] First valve 11:

[0059] The first valve 11 is installed on the connecting pipeline between the second cooling tower and the precooler circulation return tank 05. The first valve 11 is specifically arranged on one side of the sulfuric acid device 02 for easy operation and maintenance.

[0060] The main function of the first valve 11 is to control the cooling water flow from the second cooling tower to the precooler circulation back to the water tank 05. By adjusting the opening of the valve, the amount of water flowing through this pipeline can be accurately controlled to ensure the water balance of the system.

[0061] In some cases, it is necessary to prevent the water in the precooler circulating back water tank 05 from flowing back to the second cooling tower. The first valve 11 can be closed when necessary to avoid mixing of water quality and ensure stable water quality in each device.

[0062] When the system needs to be maintained or overhauled, the cooling water systems of the sulfuric acid unit 02 and the phosphoric acid unit 01 can be isolated by closing the first valve 11. In this way, separate maintenance operations can be performed safely without affecting the normal operation of the other unit.

[0063] In an optional embodiment, a second valve 12 is provided on a pipeline connecting the second cooling tower and the precooler circulation return water tank 05 , and the second valve 12 is provided on one side of the phosphoric acid device 01 .

[0064] Second valve 12:

[0065] The second valve 12 is installed on the connecting pipeline between the second cooling tower and the precooler circulation return tank 05.

[0066] The second valve 12 is specifically disposed at one side of the phosphoric acid device 01 for easy operation and maintenance.

[0067] The main function of the second valve 12 is to control the cooling water flow from the second cooling tower to the precooler circulation back to the water tank 05. By adjusting the opening of the valve, the amount of water flowing through this pipeline can be accurately controlled to ensure the water balance of the system.

[0068] In some cases, it is necessary to prevent the water in the precooler circulating back water tank 05 from flowing back to the second cooling tower. The second valve 12 can be closed when necessary to avoid mixing of water quality and ensure stable water quality in each device.

[0069] When the system needs to be maintained or overhauled, the cooling water systems of the phosphoric acid unit 01 and the sulfuric acid unit 02 can be isolated by closing the second valve 12. In this way, separate maintenance operations can be performed safely without affecting the normal operation of the other unit.

[0070] In an optional embodiment, the finished acid cooler 10 and the dry acid absorption cooler are both provided with a return water pipeline 13 connected to the second cooling tower.

[0071] In an optional embodiment, in the cooling water tower device of the sulfuric acid device 02 provided in the present application, the finished acid cooler 10 and the dry acid absorption cooler are both provided with a return water pipeline 13 connected to the second cooling tower.

[0072] Return pipe 13:

[0073] The return water pipeline 13 is installed on the finished acid cooler 10 and the dry acid absorption cooler. The return water pipeline 13 is connected to the second cooling tower to form a circulation system.

[0074] The main function of the return water pipeline 13 is to return the used cooling water in the finished acid cooler 10 and the dry acid absorption cooler to the second cooling tower for recooling. In this way, the recycling of cooling water can be ensured and the utilization efficiency of water resources can be improved.

[0075] By providing the water return pipe 13, the water flow balance of the entire cooling system can be maintained, and the excessive or insufficient water flow inside the system can be prevented, thereby ensuring the normal operation of each cooler.

[0076] With the help of the return water pipeline 13, the used cooling water can flow back to the second cooling tower for treatment and reuse, reducing the risk of water pollution and ensuring the cleanliness of the cooling water.

[0077] By setting a return water pipeline 13 connected to the second cooling tower on the finished acid cooler 10 and the dry acid absorption cooler, the cooling water can be recycled, the cooling efficiency can be improved, water resources can be saved, the stability and reliability of the system can be ensured, and a strong guarantee is provided for the optimization and efficient operation of the cooling water tower device of the sulfuric acid unit 02.

[0078] In an optional embodiment, a return tank pump 14 is provided on the pipeline connecting the precooler circulation return tank 05 and the rotary filter 06 .

[0079] In an optional embodiment, in the cooling water tower device of the sulfuric acid device 02 provided in the present application, a return water tank pump 14 is provided on the pipeline connecting the precooler circulation return water tank 05 and the rotary disc filter 06.

[0080] Return tank pump 14:

[0081] The return tank pump 14 is installed on the pipeline connecting the precooler circulation return tank 05 and the rotary filter 06.

[0082] Used to transport the industrial water circulated back from the precooler to the water tank 05 to the rotary disc filter 06.

[0083] The main function of the return tank pump 14 is to enhance the ability of the precooler circulation return tank 05 to transport industrial water to the rotary disc filter 06, ensuring stable water flow and sufficient pressure to meet the processing requirements of the filter.

[0084] The stable water flow provided by the return tank pump 14 can improve the filtering efficiency of the rotary disc filter 06 and ensure the treatment quality and speed of industrial water.

[0085] The provision of the return tank pump 14 can prevent water flow interruption caused by insufficient water flow or insufficient pressure, thereby ensuring continuous operation and efficient operation of the system.

[0086] The return tank pump 14 can be connected to the automatic control device of the system to realize automatic start and stop and flow regulation, thereby further improving the automation level and operation efficiency of the system.

[0087] It can also be operated by manual valves and control devices, which is convenient for operators to adjust and control in special circumstances.

[0088] In an optional embodiment, the rotary disc filter 06 is provided with a first washing zone 15 , a second washing zone 16 , a third washing zone 17 , a feed zone and a wash zone 18 .

[0089] In an optional embodiment, in the cooling water tower device of the sulfuric acid device 02 provided in the present application, the rotary disc filter 06 is provided with a first washing zone 15 , a second washing zone 16 , a third washing zone 17 , a feed zone and a wash plate zone 18 .

[0090] Rotary disc filter 06:

[0091] The first washing zone 15 is used for preliminary washing of the filtered solid matter to remove most of the impurities.

[0092] The second washing zone 16 is used for further washing to further remove the residual impurities in the solid matter.

[0093] The third washing zone 17: the final washing step to ensure that the solid matter reaches the final cleanliness standard.

[0094] Feeding area: used to receive industrial water delivered from the precooler circulation return tank 05, which contains solid matter to be filtered.

[0095] Flushing area: used to regularly flush the filter disc of the rotary disc filter 06 to prevent clogging and ensure filtering efficiency.

[0096] In this embodiment, by arranging the first washing zone 15, the second washing zone 16, the third washing zone 17, the feed zone and the flushing zone 18 on the rotary filter 06, efficient multi-stage filtration treatment can be achieved, ensuring high-quality treatment of industrial water, improving the stability of the system and resource utilization efficiency, and providing a strong guarantee for the optimization and efficient operation of the cooling water tower device of the sulfuric acid device 02.

[0097] In an optional embodiment, the precooler circulation return water tank 05 is provided with a water level sensor 19 for detecting the water level and controlling the start and stop of the first cooling water pump 03 and the second cooling water pump 07 .

[0098] In an optional embodiment, in the cooling water tower device of the sulfuric acid device 02 provided in the present application, the precooler circulation return water tank 05 is provided with a water level sensor 19 for detecting the water level and controlling the start and stop of the first cooling water pump 03 and the second cooling water pump 07.

[0099] Precooler circulation return tank 05:

[0100] It is used to store and circulate industrial water in the precooler. The water level is monitored in real time by the water level sensor 19 to ensure that the water volume is within a reasonable range.

[0101] Water level sensor 19:

[0102] It is set in the precooler circulation water tank 05 to detect the water level of the water tank. It monitors the water level in the water tank in real time and feeds back to the control system.

[0103] The first cooling water pump 03 and the second cooling water pump 07:

[0104] The first cooling tower 04 and the second cooling tower are connected respectively, and are communicated with the precooler circulation water tank 05. The start and stop of the pump are controlled by the feedback signal of the water level sensor 19.

[0105] The water level sensor 19 can monitor the water level in the precooler circulation return water tank 05 in real time to ensure accurate acquisition of water level information.

[0106] The water level information fed back by the water level sensor 19 is used to automatically control the start and stop of the first cooling water pump 03 and the second cooling water pump 07, thereby realizing intelligent management.

[0107] When the water level is too high, the water level sensor 19 can trigger the water pump to stop running to prevent overflow;

[0108] When the water level is too low, the water level sensor 19 can start the water pump to prevent the water tank from drying up and ensure stable operation of the system.

[0109] By setting a water level sensor 19 in the precooler circulation return water tank 05, real-time monitoring of the water level and intelligent control of the first cooling water pump 03 and the second cooling water pump 07 are achieved, thereby improving the automation level and operation efficiency of the system, ensuring the stability and reliability of the system, and providing important support for the optimization and efficient operation of the cooling water tower device of the sulfuric acid unit 02.

[0110] In an optional embodiment, the first valve 11 and the second valve 12 are automatic regulating valves, which can automatically adjust the opening according to preset parameters to control the cooling water flow.

[0111] In an optional embodiment, in the cooling water tower device of the sulfuric acid device 02 provided in the present application, the first valve 11 and the second valve 12 are automatic regulating valves, which can automatically adjust the opening according to preset parameters to control the cooling water flow.

[0112] First valve 11:

[0113] It is set on the pipeline connecting the second cooling tower and the precooler circulating water return tank 05, close to the sulfuric acid device 02. The opening is automatically adjusted according to the preset parameters to control the cooling water flow from the second cooling tower to the precooler circulating water return tank 05.

[0114] Second valve 12:

[0115] It is installed on the pipeline connecting the second cooling tower and the precooler circulating water return tank 05, close to the phosphoric acid device 01. It automatically adjusts the opening according to the preset parameters to control the cooling water flow from the second cooling tower to the precooler circulating water return tank 05.

[0116] The first valve 11 and the second valve 12 can automatically adjust their openings according to system preset parameters to achieve precise control of the cooling water flow rate.

[0117] Through the precise control of the automatic regulating valve, the reasonable distribution of cooling water in the system can be ensured, and the operating efficiency and stability of the system can be optimized.

[0118] Automatic regulating valves can quickly adjust their opening according to system operating conditions and real-time demand changes, ensuring that the system can operate efficiently under various operating conditions.

[0119] In an optional embodiment, the first cooling water pump 03 and the second cooling water pump 07 are variable frequency water pumps, and the pump speed can be adjusted according to system requirements.

[0120] In this embodiment, the first and second cooling water pumps 07 in the system both use variable frequency technology, also known as speed-adjustable pumps, which means that the running speed of the water pumps can be adjusted according to the actual needs of the system, rather than being fixed at a single running speed.

[0121] Through variable frequency control, the water pump can adjust the output flow and pressure according to the real-time cooling demand, thereby optimizing energy efficiency and saving energy. For example, when the system demand is low, the pump speed can be reduced to save energy; when the demand is high, the speed can be increased to meet the cooling requirements of the system.

[0122] In an optional embodiment, a packing layer 20 is provided inside the first cooling tower.

[0123] In this embodiment, the interior design of the cooling water tower includes a filler layer 20. The filler is usually an object of a specific shape and material, installed inside the cooling water tower to increase the contact surface area between water and air.

[0124] The presence of the packing layer 20 increases the contact area between the cooling water and the ambient air, thereby improving the cooling efficiency. By increasing the contact surface area, the packing layer 20 can help improve the heat transfer efficiency of the cooling water tower, thereby achieving a higher cooling effect within the same volume.

[0125] It should be noted that the above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present application. Various modifications to these embodiments will be apparent to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cooling water tower device for a sulfuric acid plant, characterized in that: include: A phosphoric acid device and a sulfuric acid device, wherein the phosphoric acid device is provided with a first cooling water pump, a first cooling tower, a precooler circulating water return tank and a rotary disc filter, the first cooling tower is connected to the precooler circulating water return tank through a pipeline, the first cooling water pump pumps water from the first cooling tower into the precooler circulating water return tank, and the precooler circulating water return tank delivers industrial water to the rotary disc filter; The sulfuric acid device is provided with a second cooling water pump, a second cooling water tower, a dry acid absorption cooler and a finished acid cooler. Industrial water is stored in the second cooling tower. The second cooling tower is connected to the dry acid absorption cooler and the finished acid cooler through pipelines, respectively. The second cooling tower is also connected to the precooler circulation return water tank through a pipeline. The second cooling water pump pumps the industrial water in the second cooling tower into the dry acid absorption cooler, the finished acid cooler and the precooler circulation return water tank.

2. The cooling water tower device of the sulfuric acid plant according to claim 1, characterized in that: A first valve is arranged on a pipeline connecting the second cooling tower and the precooler circulation return water tank, and the first valve is arranged on one side of the sulfuric acid device.

3. The cooling water tower device of the sulfuric acid plant according to claim 1, characterized in that: A second valve is arranged on a pipeline connecting the second cooling tower and the precooler circulation return water tank, and the second valve is arranged on one side of the phosphoric acid device.

4. The cooling water tower device for sulfuric acid plant according to claim 1, characterized in that: The finished acid cooler and the dry acid absorption cooler are both provided with a return water pipeline connected to the second cooling tower.

5. The cooling water tower device for sulfuric acid plant according to claim 1, characterized in that: A return water tank pump is arranged on the pipeline connecting the precooler circulation return water tank and the rotary disc filter.

6. The cooling water tower device for sulfuric acid plant according to claim 1, characterized in that: The rotary disc filter is provided with a first washing area, a second washing area, a third washing area, a feeding area and a flushing area.

7. The cooling water tower device for sulfuric acid plant according to claim 1, characterized in that: The precooler circulation water return tank is provided with a water level sensor for detecting the water level and controlling the start and stop of the first cooling water pump and the second cooling water pump.

8. The cooling water tower device for sulfuric acid plant according to claim 1, characterized in that: The first valve and the second valve are automatic regulating valves, which can automatically adjust the opening according to preset parameters to control the cooling water flow.

9. The cooling water tower device for sulfuric acid plant according to claim 1, characterized in that: The first cooling water pump and the second cooling water pump are variable frequency water pumps, and the pump speed can be adjusted according to system requirements.

10. The cooling water tower device for sulfuric acid plant according to claim 1, characterized in that: A packing layer is provided inside the first cooling tower.

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