Waste gas treatment device

Abstract

The utility model provides a waste gas treatment device which comprises a quench tower, a water scrubber, a water pipeline, a waste gas pipeline and a liquid discharge pipeline, a first spraying assembly is arranged in the quench tower, the bottom of the quench tower is communicated with a quench water tank, and the quench water tank is connected with the first spraying assembly through a first water pump set; a second spraying assembly is arranged in the water washing tower, a filler group is arranged in the water washing tower, the bottom of the water washing tower is communicated with a water washing water tank, and the water washing water tank is connected with the second spraying assembly through a second water pump group; the water pipeline is connected with a first water pipe, a second water pipe and a third water pipe which are connected in parallel, the first water pipe is connected with the first spraying assembly, the second water pipe is connected with the quench tower, and the third water pipe is connected with the bath tower; the waste gas pipeline is connected with the quench tower, the quench tower is connected with the water scrubber through a first exhaust pipeline, and the water scrubber is provided with a second exhaust pipeline; the liquid discharging pipeline is connected with a first liquid discharging pipe and a second liquid discharging pipe, and the first liquid discharging pipe and the second liquid discharging pipe are connected with the first water pump set and the second water pump set respectively.

Description

Technical Field

[0001] The utility model belongs to the technical field of combustion devices, and particularly relates to an exhaust gas treatment device. Background Technique

[0002] RTO (Regenerative Thermal Oxidizer) is an efficient organic waste gas treatment device. Its working principle is to heat the organic waste gas to 760 - 850 °C, so that the VOC in the waste gas is oxidized and decomposed into harmless CO2 and H2O. After the chlorine-containing organic waste gas passes through the high-temperature incineration treatment of RTO, HCl gas will be generated. This harmful gas needs to be treated by appropriate methods to avoid harm to the environment and human health.

[0003] The traditional treatment method is to pass the waste gas after the high-temperature incineration treatment of RTO through a spray tower. In the spray tower, the HCl gas in the waste gas is absorbed by spraying, and sodium hydroxide (NaOH) lye is introduced into the spray tower for absorption to generate sodium chloride (NaCl) salt solution. In this treatment method, HCl cannot be recycled, and at the same time, the usage amount of NaOH will increase. HCl and NaOH will generate industrial wastewater containing NaCl, further increasing the disposal cost of the enterprise; the HCl gas in the waste gas cannot be completely absorbed by passing through the spray tower, and it will still cause harm to the environment and human health after being discharged. Therefore, it is necessary to provide an exhaust gas treatment device to solve the above problems. Content of the Utility Model

[0004] The utility model provides an exhaust gas treatment device. After the high-temperature incineration treatment of RTO, the waste gas passes through a quench tower and a water wash tower in sequence. Packing is arranged in the water wash tower to extend the passing area and time of the waste gas, improve the absorption efficiency of HCl gas, and effectively remove the HCl gas in the waste gas; both the quench tower and the water wash tower are provided with spray components, water tanks and water pump groups for circulating spraying to achieve the enrichment and recovery of HCl.

[0005] To achieve the above object, the utility model provides the following technical solutions.

[0006] An exhaust gas treatment device includes a quench tower, a water wash tower, a water pipeline, an exhaust gas pipeline, and a drain pipeline. A first spraying assembly is provided in the quench tower. A quench water tank is connected to the bottom of the quench tower in a communicating manner, and the quench water tank is connected to the first spraying assembly through a first water pump group; a second spraying assembly is provided in the water wash tower, and a packing group is provided in the water wash tower corresponding to the second spraying assembly. A water wash water tank is connected to the bottom of the water wash tower in a communicating manner, and the water wash water tank is connected to the second spraying assembly through a second water pump group; the water pipeline is connected to a first water pipe, a second water pipe, and a third water pipe in parallel. The first water pipe is connected to the first spraying assembly, the second water pipe is connected to the water inlet of the quench tower, and the third water pipe is connected to the water inlet of the water wash tower; the exhaust gas pipeline is connected to the gas inlet of the quench tower, and a first exhaust gas pipeline is connected to the top of the quench tower in a communicating manner; the first exhaust gas pipeline is connected to the gas inlet of the water wash tower, and a second exhaust gas pipeline is provided at the top of the water wash tower; after the exhaust gas is transported to the quench tower through the exhaust gas pipeline and quenched by spraying, it is output to the water wash tower through the first exhaust gas pipeline, washed through the packing group, and discharged from the second exhaust gas pipeline; the drain pipeline is connected to a first drain pipe and a second drain pipe in parallel. The first drain pipe is connected to the first water pump group, and the second drain pipe is connected to the second water pump group. The aqueous solutions enriched with HCl gas in the exhaust gas in the quench tower and the water wash tower are respectively output to the drain pipeline through the first water pump group and the second water pump group via the first drain pipe and the second drain pipe.

[0007] Preferably, a first control valve is provided on the first water pipe, and a temperature sensor is provided on the first exhaust gas pipeline. The temperature sensor is electrically connected to the first control valve to control the opening and closing of the first control valve. When the temperature detected by the temperature sensor is greater than a set temperature value, the first control valve is controlled to open.

[0008] Preferably, a second control valve is provided on the second water pipe. The quench water tank is provided with a first liquid level sensor and a first concentration sensor. Both the first liquid level sensor and the first concentration sensor are electrically connected to the second control valve to control the opening and closing of the second control valve. When the liquid level detected by the first liquid level sensor is less than a set first liquid level value or the concentration detected by the first concentration sensor is greater than a set first concentration value, the second control valve is controlled to open.

[0009] Preferably, a fourth control valve and a first check valve are provided on the first drain pipe. The fourth control valve is electrically connected to both the first liquid level sensor and the first concentration sensor to control the opening and closing of the fourth control valve. When the liquid level detected by the first liquid level sensor is greater than a set second liquid level value and the concentration detected by the first concentration sensor is greater than or equal to a set second concentration value, the fourth control valve is controlled to open; the second liquid level value is greater than the first liquid level value, and the second concentration value is less than the first concentration value.

[0010] Preferably, a third control valve is provided on the third water pipe. The water washing water tank is provided with a second liquid level sensor and a second concentration sensor. Both the second liquid level sensor and the second concentration sensor are electrically connected to the third control valve to control the opening and closing of the third control valve. When the liquid level detected by the second liquid level sensor is less than a set third liquid level value or the concentration detected by the second concentration sensor is greater than a set third concentration value, the third control valve is controlled to open.

[0011] Preferably, a fifth control valve and a second check valve are provided on the second drain pipe. The fifth control valve is electrically connected to both the second liquid level sensor and the second concentration sensor to control the opening and closing of the fifth control valve. When the liquid level detected by the second liquid level sensor is greater than a set fourth liquid level value and the concentration detected by the second concentration sensor is greater than or equal to a set fourth concentration value, the fifth control valve is controlled to open; the fourth liquid level value is greater than the third liquid level value, and the fourth concentration value is less than the third concentration value.

[0012] Preferably, the water pipeline further includes a fourth water pipe, which connects the second control valve and the first exhaust pipeline, and a first ball valve is provided on the fourth water pipe.

[0013] Preferably, a connecting pipe is provided between the first exhaust pipeline and the second exhaust pipeline, and a second ball valve, a pressure gauge and a third ball valve are sequentially provided on the connecting pipe.

[0014] Preferably, a drainage pipeline is further included. The drainage pipeline is connected to an auxiliary water tank, and the auxiliary water tank is connected to the drainage outlets of the quench tower and the water washing tower through a first drain pipe; the auxiliary water tank is connected to the second pump set of the water washing tower through a second drain pipe, and a sixth control valve and a third check valve are provided on the second pump set.

[0015] Preferably, the first water pump set includes a first main water pump and a first standby water pump, and pressure gauges are provided on both the first main water pump and the first standby water pump; the second water pump set includes a second main water pump and a second standby water pump, and pressure gauges are provided on both the second main water pump and the second standby water pump.

[0016] Compared with the prior art, the technical solution of the embodiment of the present utility model has beneficial effects.

[0017] The present utility model is provided with a quench tower and a water wash tower. After the high-temperature incineration treatment by the RTO, the waste gas passes through the quench tower and the water wash tower in sequence. A packing group is arranged in the water wash tower to extend the passing area and time of the waste gas, improve the absorption efficiency of HCl gas, and effectively remove the HCl gas in the waste gas; a first spraying assembly is arranged in the quench tower, and a connected quench water tank is arranged at the bottom of the quench tower. The quench water tank is connected to the first spraying assembly through a first water pump group to realize the circulating spraying of the solution in the quench water tank; a second spraying assembly is arranged in the water wash tower, and a connected water wash water tank is arranged at the bottom of the water wash tower. The water wash water tank is connected to the second spraying assembly through a second water pump group to realize the circulating spraying of the solution in the water wash water tank; the enrichment and recovery of the HCl solution are realized; the HCl gas in the waste gas can be recycled, reducing the use of NaOH; improving the utilization efficiency of resources and reducing the environmental pollution risk. Description of the Drawings

[0018] Figure 1 It is the schematic diagram of the waste gas treatment device in the embodiment of the present utility model.

[0019] Description of the Reference Numerals:

[0020] 1. Quench tower; 11. First spraying assembly; 12. Quench water tank; 121. First liquid level sensor; 122. First concentration sensor; 13. First water pump group;

[0021] 2. Water wash tower; 21. Second spraying assembly; 22. Packing group; 23. Water wash water tank; 231. Second liquid level sensor; 232. Second concentration sensor; 24. Second water pump group;

[0022] 3. Water pipeline; 31. First water pipe; 311. First control valve; 32. Second water pipe; 321. Second control valve; 33. Third water pipe; 331. Third control valve; 34. Fourth water pipe; 341. First ball valve;

[0023] 4. Waste gas pipeline; 41. First exhaust pipeline; 411. Temperature sensor; 42. Second exhaust pipeline; 43. Connecting pipe; 431. Second ball valve; 432. Pressure gauge; 433. Third ball valve;

[0024] 5. Drainage pipeline; 51. First drain pipe; 511. Fourth control valve; 512. First check valve; 52. Second drain pipe; 521. Fifth control valve; 522. Second check valve;

[0025] 7. Drainage pipeline; 71. Auxiliary water tank; 72. First drain pipe; 73. Second drain pipe; 731. Sixth control valve; 732. Third check valve. Detailed implementation manners

[0026] To make the objectives, features and beneficial effects of the present utility model more obvious and understandable, the following will describe in detail the specific implementation manners of the present utility model with reference to the accompanying drawings. It can be understood that the specific implementation manners described below are only used to explain the present utility model, rather than limiting the present utility model. And in the figures, the same or similar reference numerals may be used to refer to the same or similar elements in different embodiments, and the descriptions of the same or similar elements in different embodiments and the descriptions of the prior art elements, features, effects, etc. may also be omitted.

[0027] Refer to Figure 1 , an embodiment of the present utility model provides an exhaust gas treatment device.

[0028] Specifically, it includes a quench tower 1, a water wash tower 2, a water pipeline 3, an exhaust gas pipeline 4 and a drain pipeline 5;

[0029] A first spray assembly 11 is provided in the quench tower 1, a quench water tank 12 is connected and arranged at the bottom of the quench tower 1, and the quench water tank 12 is connected to the first spray assembly 11 through a first water pump group 13; to realize the circulating spray of the solution in the quench water tank 12; a second spray assembly 21 is provided in the water wash tower 2, a water wash water tank 23 is connected and arranged at the bottom of the water wash tower 2, and the water wash water tank 23 is connected to the second spray assembly 21 through a second water pump group 24, to realize the circulating spray of the solution in the water wash water tank 23 and realize the enrichment and recovery of HCl in the quench tower 1;

[0030] A second spray assembly 21 is provided in the water wash tower 2, a packing group 22 is arranged corresponding to the second spray assembly 21 in the water wash tower 2, and a packing group 22 is arranged in the wash tower to extend the passing area and time of the exhaust gas and improve the absorption efficiency of HCl gas, so as to effectively remove the HCl gas in the exhaust gas; a water wash water tank 23 is connected and arranged at the bottom of the water wash tower 2, and the water wash water tank 23 is connected to the second spray assembly 21 through a second water pump group 24, to realize the circulating spray of the solution in the water wash water tank 23 and realize the enrichment and recovery of HCl in the water wash tower 2;

[0031] The water pipeline 3 is connected to a first water pipe 31, a second water pipe 32 and a third water pipe 33 in parallel. The first water pipe 31 is connected to the first spray assembly 11, the second water pipe 32 is connected to the water inlet of the quench tower 1, and the third water pipe 33 is connected to the water inlet of the water wash tower 2;

[0032] The exhaust gas pipeline 4 is connected to the air inlet of the quench tower 1, and a first exhaust gas pipeline 41 is communicated and arranged at the top of the quench tower 1; the first exhaust gas pipeline 41 is connected to the air inlet of the water washing tower 2, and a second exhaust gas pipeline 42 is arranged at the top of the water washing tower 2; after the exhaust gas is transported to the quench tower 1 through the exhaust gas pipeline 4 and subjected to quench spraying, it is output to the water washing tower 2 through the first exhaust gas pipeline 41, washed by the packing group 22, and discharged from the second exhaust gas pipeline 42; the drain pipeline 5 is connected with a first drain pipe 51 and a second drain pipe 52 in parallel. The first drain pipe 51 is connected to the first water pump group 13, and the second drain pipe 52 is connected to the second water pump group 24. The aqueous solutions enriched with HCl gas in the exhaust gas in the quench tower 1 and the water washing tower 2 are respectively output to the drain pipeline 5 through the first water pump group 13 and the second water pump group 24 via the first drain pipe 51 and the second drain pipe 52, realizing the output of the enriched and recovered HCl solution.

[0033] In some embodiments, a first control valve 311 is arranged on the first water pipe 31, and a temperature sensor 411 is arranged on the first exhaust gas pipeline 41. The temperature sensor 411 is electrically connected to the first control valve 311 to control the opening and closing of the first control valve 311. When the temperature detected by the temperature sensor 411 is greater than the set temperature value, the first control valve 311 is controlled to open.

[0034] In some embodiments, a second control valve 321 is arranged on the second water pipe 32. The quench water tank 12 is provided with a first liquid level sensor 121 and a first concentration sensor 122. Both the first liquid level sensor 121 and the first concentration sensor 122 are electrically connected to the second control valve 321 to control the opening and closing of the second control valve 321. When the liquid level detected by the first liquid level sensor 121 is less than the set first liquid level value, that is, the liquid level in the quench tower 1 is too low, or the concentration detected by the first concentration sensor 122 is greater than the set first concentration value, that is, the solution concentration in the quench tower 1 is too high, the second control valve 321 is controlled to open to supplement water to increase the water volume or dilute the solution to reduce the concentration.

[0035] In some embodiments, a fourth control valve 511 and a first check valve 512 are arranged on the first drain pipe 51. The fourth control valve 511 is electrically connected to both the first liquid level sensor 121 and the first concentration sensor 122 to control the opening and closing of the fourth control valve 511. When the liquid level detected by the first liquid level sensor 121 is greater than the set second liquid level value and the concentration detected by the first concentration sensor 122 is greater than or equal to the set second concentration value, the fourth control valve 511 is controlled to open; wherein, the second liquid level value is greater than the first liquid level value, and the second concentration value is less than the first concentration value; that is, when the solution in the quench tower 1 reaches the set amount and the set concentration, the solution is output.

[0036] In some embodiments, a third control valve 331 is provided on the third water pipe 33. A second liquid level sensor 231 and a second concentration sensor 232 are provided in the water washing water tank 23. Both the second liquid level sensor 231 and the second concentration sensor 232 are electrically connected to the third control valve 331 to control the opening and closing of the third control valve 331. When the liquid level detected by the second liquid level sensor 231 is less than a set third liquid level value, that is, the liquid level in the water washing tower 2 is too low, or when the concentration detected by the second concentration sensor 232 is greater than a set third concentration value, that is, the solution concentration in the water washing tower 2 is too high, the third control valve 331 is controlled to open to supplement water to increase the water volume or dilute the solution to reduce the concentration.

[0037] In some embodiments, a fifth control valve 521 and a second check valve 522 are provided on the second drain pipe 52. The fifth control valve 521 is electrically connected to both the second liquid level sensor 231 and the second concentration sensor 232 to control the opening and closing of the fifth control valve 521. When the liquid level detected by the second liquid level sensor 231 is greater than a set fourth liquid level value and the concentration detected by the second concentration sensor 232 is greater than or equal to a set fourth concentration value, the fifth control valve 521 is controlled to open; the fourth liquid level value is greater than the third liquid level value, and the fourth concentration value is less than the third concentration value; that is, when the solution in the water washing tower 2 reaches the set amount and the set concentration, the solution is output.

[0038] In some embodiments, the water pipeline 3 further includes a fourth water pipe 34. The fourth water pipe 34 communicates with the second control valve 321 and the first exhaust pipe 41. A first ball valve 341 is provided on the fourth water pipe 34 to introduce water into the first exhaust pipe 41, so that HCl in the waste gas can contact water as much as possible and be absorbed as much as possible.

[0039] In some embodiments, a connecting pipe 43 is provided between the first exhaust pipe 41 and the second exhaust pipe 42. A second ball valve 431, a pressure gauge 432, and a third ball valve 433 are sequentially provided on the connecting pipe 43. When the second ball valve 431 is opened and the third ball valve 433 is closed, the pressure gauge 432 measures the pressure of the first exhaust pipe 41. When the second ball valve 431 is closed and the third ball valve 433 is opened, the pressure gauge 432 measures the pressure of the second exhaust pipe 42.

[0040] In some embodiments, a drain pipeline 7 is further included for draining water during the device cleaning process. The drain pipeline 7 is connected to an auxiliary water tank 71. The auxiliary water tank 71 is connected to the drain outlets of the quench tower 1 and the water washing tower 2 through a first drain pipe 72; the auxiliary water tank 71 is connected to the second pump group 24 of the water washing tower 2 through a second drain pipe 73. A sixth control valve 731 and a third check valve 732 are provided on the second drain pipe 73.

[0041] In some embodiments, the first water pump group 13 includes a first main water pump and a first standby water pump, and pressure gauges are provided on both the first main water pump and the first standby water pump; the second water pump group 24 includes a second main water pump and a second standby water pump, and pressure gauges are provided on both the second main water pump and the second standby water pump.

[0042] In summary, for the waste gas treatment device according to the embodiment of the present invention, after the high-temperature incineration treatment by the RTO, the waste gas sequentially passes through the quench tower 1 and the water washing tower 2. The packing group 22 is arranged in the water washing tower 2 to extend the passing area and time of the waste gas, improve the absorption efficiency of HCl gas, and effectively remove the HCl gas in the waste gas; the first spraying assembly 11 is arranged in the quench tower 1, and the connected quench water tank 12 is arranged at the bottom of the quench tower 1. The quench water tank 12 is connected to the first spraying assembly 11 through the first water pump group 13 to realize the circulating spraying of the solution in the quench water tank 12; the second spraying assembly 21 is arranged in the water washing tower 2, and the connected water washing water tank 23 is arranged at the bottom of the water washing tower 2. The water washing water tank 23 is connected to the second spraying assembly 21 through the second water pump group 24 to realize the circulating spraying of the solution in the water washing tank 2; the enrichment and recovery of the HCl solution are realized; the HCl gas in the waste gas can be recycled, the use of NaOH is reduced; the utilization efficiency of resources is improved, and the environmental pollution risk is reduced.

[0043] Although the specific embodiments have been described above, these embodiments are not intended to limit the scope of the disclosure of the present invention, even when a single embodiment is described only with respect to a specific feature. The feature examples provided in the disclosure of the present invention are intended to be illustrative rather than restrictive, unless otherwise stated. In a specific implementation, according to actual requirements and when technically feasible, the technical features of one or more dependent claims can be combined with the technical features of the independent claim, and can be combined in any appropriate manner rather than only through the specific combinations listed in the claims from the technical features of the corresponding independent claim.

Claims

1. An exhaust gas treatment device, characterized in that: The invention comprises a quenching tower, a water washing tower, a water pipeline, an exhaust gas pipeline and a drainage pipeline, wherein a first spray assembly is arranged in the quenching tower, a quenching water tank is arranged at the bottom of the quenching tower, and the quenching water tank is connected to the first spray assembly through a first water pump group; a second spray assembly is arranged in the water washing tower, a packing group is arranged in the water washing tower corresponding to the second spray assembly, a water washing water tank is arranged at the bottom of the water washing tower, and the water washing water tank is connected to the second spray assembly through a second water pump group; the water pipeline is connected with a first water pipe, a second water pipe and a third water pipe connected in parallel, the first water pipe is connected to the first spray assembly, the second water pipe is connected to the water inlet of the quenching tower, and the third water pipe is connected to the water inlet of the water washing tower; the exhaust gas pipeline is connected to the The air inlet of the quenching tower is connected to a first exhaust pipeline disposed on the top of the quenching tower; the first exhaust pipeline is connected to the air inlet of the water scrubber, and a second exhaust pipeline is disposed on the top of the water scrubber; the waste gas is transported to the quenching tower via the exhaust pipeline, and after being quenched and sprayed, it is output to the water scrubber through the first exhaust pipeline, and is washed with water through the packing group and then discharged from the second exhaust pipeline; the drainage pipeline is connected to a first drainage pipe and a second drainage pipe connected in parallel, the first drainage pipe is connected to a first water pump group, and the second drainage pipe is connected to a second water pump group, and the aqueous solution enriched with HCl gas in the waste gas in the quenching tower and the water scrubber is respectively output to the drainage pipeline via the first drainage pipe and the second drainage pipe through the first water pump group and the second water pump group.

2. The exhaust gas treatment device according to claim 1, characterized in that: A first control valve is provided on the first water pipe, and a temperature sensor is provided on the first exhaust pipe. The temperature sensor is electrically connected to the first control valve to control the opening and closing of the first control valve. When the temperature detected by the temperature sensor is greater than a set temperature value, the first control valve is controlled to open.

3. The exhaust gas treatment device according to claim 1, characterized in that: A second control valve is provided on the second water pipe, and a first liquid level sensor and a first concentration sensor are provided in the quenching water tank. Both the first liquid level sensor and the first concentration sensor are electrically connected to the second control valve to control the opening and closing of the second control valve. When the liquid level detected by the first liquid level sensor is less than a set first liquid level value or the concentration detected by the first concentration sensor is greater than a set first concentration value, the second control valve is controlled to open.

4. The exhaust gas treatment device according to claim 3, characterized in that: A fourth control valve and a first check valve are provided on the first liquid discharge pipe. The fourth control valve is electrically connected to the first liquid level sensor and the first concentration sensor to control the opening and closing of the fourth control valve. When the liquid level detected by the first liquid level sensor is greater than a set second liquid level value and the concentration detected by the first concentration sensor is greater than or equal to a set second concentration value, the fourth control valve is controlled to open; the second liquid level value is greater than the first liquid level value, and the second concentration value is less than the first concentration value.

5. The exhaust gas treatment device according to claim 1, characterized in that: A third control valve is provided on the third water pipe, and a second liquid level sensor and a second concentration sensor are provided in the washing water tank. The second liquid level sensor and the second concentration sensor are both electrically connected to the third control valve to control the opening and closing of the third control valve. When the liquid level detected by the second liquid level sensor is less than a set third liquid level value or the concentration detected by the second concentration sensor is greater than a set third concentration value, the third control valve is controlled to open.

6. The exhaust gas treatment device according to claim 5, characterized in that: A fifth control valve and a second check valve are provided on the second liquid discharge pipe. The fifth control valve is electrically connected to the second liquid level sensor and the second concentration sensor to control the opening and closing of the fifth control valve. When the liquid level detected by the second liquid level sensor is greater than a set fourth liquid level value and the concentration detected by the second concentration sensor is greater than or equal to a set fourth concentration value, the fifth control valve is controlled to open; the fourth liquid level value is greater than the third liquid level value, and the fourth concentration value is less than the third concentration value.

7. The exhaust gas treatment device according to claim 3, characterized in that: The water pipeline further includes a fourth water pipe, the fourth water pipe is connected to the second control valve and the first exhaust pipeline, and a first ball valve is arranged on the fourth water pipe.

8. The exhaust gas treatment device according to claim 1, characterized in that: A connecting pipe is arranged between the first exhaust pipeline and the second exhaust pipeline, and a second ball valve, a pressure gauge and a third ball valve are arranged on the connecting pipe in sequence.

9. The exhaust gas treatment device according to claim 1, characterized in that: It also includes a drainage pipeline, which is connected to an auxiliary water tank. The auxiliary water tank is connected to the drain outlet of the quenching tower and the drain outlet of the water washing tower through a first drainage pipe; the auxiliary water tank is connected to the second water pump group of the water washing tower through a second drainage pipe, and the second water pump group is provided with a sixth control valve and a third check valve.

10. The exhaust gas treatment device according to claim 1, characterized in that: The first water pump group includes a first main water pump and a first backup water pump, and the first main water pump and the first backup water pump are both provided with pressure gauges; the second water pump group includes a second main water pump and a second backup water pump, and the second main water pump and the second backup water pump are both provided with pressure gauges.

Images