Pressure control device based on pressure control tank

Abstract

The utility model relates to the technical field of pressure control devices, in particular to a pressure control device based on a pressure control tank, which comprises a concentrated acid pump tank, a pressure control mechanism comprises a pipeline unit, a pressure control tank group, a control unit, a fan, a concentrated acid drying tower and a chimney, when the system runs and is used, the automatic valve I is opened, the automatic valve III is closed, the negative pressure of the concentrated acid pump tank is provided by the fan, the automatic valve II is interlocked with the teletransmission pressure gauge at the upper part of the pump tank, the pressure in the pump tank is kept stable, the negative pressure is adjusted by the control system, and the negative pressure in the pump tank cannot fluctuate along with the negative pressure at the inlet of the drying tower; the other exhaust pipe of the pressure control tank is connected to the flue entering the chimney and used when the system stops, the third automatic valve is opened, the first automatic valve is closed, the negative pressure of the concentrated acid pump tank is provided by the chimney, it is ensured that when the system stops, the negative pressure can still be kept in the pump tank, and low-altitude pollution caused by smoke overflow is prevented.

Description

Technical Field

[0001] This utility model relates to the field of pressure control device technology, and in particular to a pressure control device based on a pressure control tank. Background Technology

[0002] Pressure control devices based on pressure-controlled tanks typically refer to equipment or systems used to monitor, regulate, and control the internal pressure of various tanks to ensure that the tanks operate within a safe pressure range.

[0003] Traditional flue gas acid production processes lack a pressure control tank and control unit in the dry absorption step of the negative pressure control system. During normal production, the pressure in the main extraction pipe flues greatly, the pressure in the pump tank is unstable, and the equipment in the pump tank is prone to corrosion. Especially when the system stops abnormally, the water seal in the pump tank is blown out, or the water seal is not filled with water when the system stops, resulting in a large amount of irritating gas leaking out and causing low-altitude pollution. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a pressure control device based on a pressure control tank, which solves the technical problem of water seal in the pump tank being blown out when the system stops abnormally, or water not being added to the water seal when the system stops, resulting in the leakage of a large amount of irritating gas and causing low-altitude pollution.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A pressure control device based on a pressure-controlled tank includes a concentrated acid pump tank, a water seal installed outside the concentrated acid pump tank, and a pressure control mechanism installed outside the concentrated acid pump tank. The pressure control mechanism includes a pipeline unit, a pressure-controlled tank group, a control unit, a fan, a concentrated acid drying tower, and a chimney. The pressure-controlled tank group is connected to the concentrated acid pump tank, the chimney, and the concentrated acid drying tower through the pipeline unit. The fan is installed outside the concentrated acid drying tower. The water seal is connected to the concentrated acid pump tank through the pipeline unit. The control unit includes a remote pressure gauge, automatic valve one, automatic valve two, automatic valve three, and a control system.

[0007] Preferred configuration: The pressure-controlled tank assembly includes a tank body, a vent pipe, and a conical cap. The tank body can be connected to multiple concentrated acid pump tanks, with at least one pipeline connected to the tank body. The conical cap is connected to the tank body via the vent pipe, which is connected to the atmosphere.

[0008] Preferred configuration: The piping unit includes pipe 1, pipe 2, pipe 3, and pipe 4. One end of pipe 1 is connected to the inlet of the concentrated acid drying tower, and the other end is connected to the top of the pressure control tank group. One end of pipe 2 is connected to the top of the pressure control tank group, and the other end is connected to the chimney inlet. One end of pipe 3 is connected to the top of the pressure control tank group, and the other end is connected to the top of the pressure control tank group. One end of pipe 4 is connected to the upper part of the pressure control tank group, and the other end is connected to the water seal.

[0009] Preferably, the remote pressure gauge is installed outside the concentrated acid pump tank, and automatic valves two and three are both installed on the pipeline unit. Automatic valve two is located between the vent pipe and the conical cap.

[0010] Preferably, automatic valve one is a pneumatic on / off valve or an electric on / off valve, automatic valve two is a pneumatic regulating valve or an electric regulating valve, and automatic valve three is a pneumatic on / off valve or an electric on / off valve. Automatic valve one is located on pipeline one, and automatic valve three is located on pipeline two.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] A pressure control tank is installed on the pressure control pipeline. The pressure control tank has two main exhaust pipes, one for use during system operation and the other for use during system shutdown. One main pipe is connected to the inlet of the drying tower. When the system is running, automatic valve one is open and automatic valve three is closed. The negative pressure in the concentrated acid pump tank is provided by the fan. Automatic valve two is interlocked with the remote pressure gauge at the top of the pump tank to maintain stable pressure in the pump tank. The magnitude of the negative pressure is automatically adjusted by the control system. The negative pressure in the pump tank will not fluctuate with the magnitude of the negative pressure at the inlet of the drying tower. The other exhaust pipe of the pressure control tank is connected to the flue leading to the chimney. When the system is shut down, automatic valve three is open and automatic valve one is closed. The negative pressure in the concentrated acid pump tank is provided by the chimney. This ensures that the negative pressure in the pump tank can still be maintained when the system is stopped, preventing flue gas from overflowing and causing low-altitude pollution.

[0013] The dry suction system ensures stable negative pressure in each pump tank, significantly improving the on-site environment. It enables zero flue gas leakage during shutdown and emergency shutdown, allows concentrated acid to overflow from the tank to other pump tanks, and achieves a zero safety and environmental accident rate. It also enables zero operation of the negative pressure system after the modification, while extending the service life of each piece of equipment and pump tank and reducing the labor intensity of employees. Attached Figure Description

[0014] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0015] Figure 1 This is a structural diagram of the present invention.

[0016] Legend: 1. Concentrated acid pump tank; 2. Piping unit; 21. Pipeline 1; 22. Pipeline 2; 23. Pipeline 3; 24. Pipeline 4; 3. Pressure control tank group; 31. Tank body; 32. Vent pipe; 33. Conical cap; 4. Control unit; 41. Remote pressure gauge; 42. Automatic valve 1; 43. Automatic valve 2; 44. Automatic valve 3; 45. Control system; 5. Fan; 6. Concentrated acid drying tower; 7. Chimney; 8. Water seal. Detailed Implementation

[0017] This application provides a pressure control device based on a pressure control tank, which effectively solves the technical problem of water seal in the pump tank being blown out when the system stops abnormally, or water seal not being filled with water when stopping, resulting in a large amount of irritating gas leaking out and causing low-altitude pollution. Example

[0018] like Figure 1 As shown, the technical solution in this application embodiment effectively solves the technical problem of water seal in pump tank being blown out when the system stops abnormally, or water seal not being added when stopping, resulting in a large amount of irritating gas leaking out and causing low-altitude pollution. The overall idea is as follows:

[0019] To address the problems existing in the prior art, this utility model provides a pressure control device based on a pressure-controlled tank, including a concentrated acid pump tank 1. The concentrated acid pump tank 1 is a commonly used concentrated acid storage device in the flue gas acid production industry, mostly made of carbon steel and lined with acid-resistant bricks. The top of the concentrated acid pump tank 1 is connected to pipe 23 (three), and the upper side is connected to pipe 24 (four). A water seal 8 is installed on the outside of the concentrated acid pump tank 1. The water seal 8 is made of fiberglass or PVC and its main function is to seal the end of pipe 24 to prevent gas escape or atmospheric entry into the concentrated acid pump tank 1. A pressure control mechanism is installed on the outside of the concentrated acid pump tank 1, which includes a pipeline unit 2, a pressure-controlled tank group 3, and a control unit 4. The system includes a fan 5, a concentrated acid drying tower 6, and a chimney 7. Piping unit 2 connects the various equipment units. Pressure control tank group 3 is used to regulate the pressure of the negative pressure system. Control unit 4 is used to realize the automatic control of this device. Fan 5 is the main fan of the flue gas acid production system and is used for power output. Concentrated acid drying tower 6 is the concentrated acid drying tower of the dry absorption system. Chimney 7 is the exhaust gas emission device. Water seal 8 is mainly used to seal the end of the overflow pipe of the pump tank. Pressure control tank group 3 is connected to concentrated acid pump tank 1, chimney 7, and concentrated acid drying tower 6 through piping unit 2. Fan 5 is located outside concentrated acid drying tower 6. Water seal 8 is connected to concentrated acid pump tank 1 through piping unit 2.

[0020] The control unit 4 includes a remote pressure gauge 41, an automatic valve 1 42, an automatic valve 2 43, an automatic valve 3 44, and a control system 45, which is a PLC or DCS system.

[0021] The pressure-controlled tank assembly 3 includes a tank body 31, a vent pipe 32, and a conical cap 33. The tank body 31 is made of fiberglass or steel lined with PTFE. The tank body 31 can be connected to multiple concentrated acid pump tanks 1, and at least one pipeline must be connected to the tank body 31 so that the condensed acid can be discharged in time. The conical cap 33 is connected to the tank body 31 through the vent pipe 32. The vent pipe 32 is connected to the atmosphere. The function of the conical cap 33 is to prevent rainwater, dust, and other impurities from entering the tank body 31. Both the vent pipe 32 and the conical cap 33 are made of fiberglass or polymer PE.

[0022] Piping unit 2 includes pipe 1 21, pipe 2 22, pipe 3 23, and pipe 4 24. Pipe 1 21, pipe 2 22, pipe 3 23, and pipe 4 24 are mostly made of fiberglass or polymer PE. One end of pipe 1 21 is connected to the inlet of concentrated acid drying tower 6, and the other end is connected to the top of pressure control tank group 3. One end of pipe 2 22 is connected to the top of pressure control tank group 3, and the other end is connected to the inlet of chimney 7. One end of pipe 3 23 is connected to the top of pressure control tank group 3, and the other end is connected to the top of pressure control tank group 3. One end of pipe 4 24 is connected to the upper part of one side of pressure control tank group 3, and the other end is connected to water seal device 8.

[0023] The remote pressure gauge 41 is installed outside the concentrated acid pump tank 1. The remote pressure gauge 41 is used to detect the pressure inside the concentrated acid pump tank 1. Automatic valve 2 43 and automatic valve 3 44 are both installed on the pipeline unit 2. Automatic valve 2 43 is located between the vent pipe 32 and the conical cap 33.

[0024] Automatic valve 1 42 is a pneumatic on / off valve or an electric on / off valve; automatic valve 2 43 is a pneumatic regulating valve or an electric regulating valve; and automatic valve 3 44 is a pneumatic on / off valve or an electric on / off valve.

[0025] Automatic valve 42 is located on pipe 21, and automatic valve 44 is located on pipe 22.

[0026] Working principle:

[0027] A pressure control tank group 3 is installed on the pressure control pipeline. The pressure control tank group 3 is equipped with two exhaust manifolds, one for use during system operation and the other for use during system shutdown. One manifold is connected to the inlet of the concentrated acid drying tower 6. When the system is running, automatic valve 1 42 is opened and automatic valve 3 44 is closed. The negative pressure of the concentrated acid pump tank 1 is provided by the blower 5. Automatic valve 2 43 is interlocked with the remote pressure gauge 41 at the top of the pump tank to maintain stable pressure in the pump tank. The remote pressure gauge 41 is set to -150 to -50 Pa. The negative pressure is automatically adjusted by the control system 45. The negative pressure in the pump tank will not fluctuate with the magnitude of the negative pressure at the inlet of the concentrated acid drying tower 6. The other exhaust manifold of the pressure control tank group 3 is connected to the flue leading to the chimney 7. When the system is shut down, automatic valve 3 44 is opened and automatic valve 1 42 is closed. The negative pressure of the concentrated acid pump tank 1 is provided by the chimney 7, ensuring that the negative pressure in the pump tank can still be maintained when the system is stopped, preventing flue gas from overflowing.

[0028] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A pressure control device based on a pressure control tank, comprising a concentrated acid pump tank (1), the outside of the concentrated acid pump tank (1) is provided with a water seal device (8), characterized in that, The outside of the concentrated acid pump tank (1) is provided with a pressure control mechanism, which comprises a pipeline unit (2), a pressure control tank group (3), a control unit (4), a fan (5), a concentrated acid drying tower (6) and a chimney (7); The pressure control tank group (3) is connected with the concentrated acid pump tank (1), the chimney (7) and the concentrated acid drying tower (6) through the pipeline unit (2), and the fan (5) is arranged outside the concentrated acid drying tower (6), and the water seal device (8) is connected with the concentrated acid pump tank (1) through the pipeline unit (2); The control unit (4) comprises a remote pressure gauge (41), an automatic valve one (42), an automatic valve two (43), an automatic valve three (44) and a control system (45).

2. A pressure control device based on a pressure control tank as claimed in claim 1, characterized in that The pressure control tank group (3) comprises a tank body (31), an air pipe (32) and a conical cap (33); The tank body (31) can be connected with a plurality of concentrated acid pump tanks (1), at least one pipeline must be connected to the tank body (31), the conical cap (33) is connected with the tank body (31) through the air pipe (32), and the air pipe (32) is connected with the atmosphere.

3. A pressure control device based on a pressure control tank as defined in claim 1, characterized in that The pipeline unit (2) comprises a pipeline one (21), a pipeline two (22), a pipeline three (23) and a pipeline four (24); One end of the pipeline one (21) is connected with the inlet of the concentrated acid drying tower (6), the other end is connected with the top of the pressure control tank group (3), one end of the pipeline two (22) is connected with the top of the pressure control tank group (3), the other end is connected with the inlet of the chimney (7), one end of the pipeline three (23) is connected with the top of the pressure control tank group (3), the other end is connected with the top of the pressure control tank group (3), one end of the pipeline four (24) is connected with the upper part of the pressure control tank group (3), and the other end is connected with the water seal device (8).

4. A pressure control device based on a pressure control tank as defined in claim 1, characterized in that The remote pressure gauge (41) is arranged outside the concentrated acid pump tank (1); The automatic valve two (43) and the automatic valve three (44) are arranged on the pipeline unit (2), and the automatic valve two (43) is located between the air pipe (32) and the conical cap (33).

5. A pressure control device based on a pressure control tank as defined in claim 1, characterized in that The automatic valve one (42) is a pneumatic on-off valve or an electric on-off valve; The automatic valve two (43) is a pneumatic regulating valve or an electric regulating valve, and the automatic valve three (44) is a pneumatic on-off valve or an electric on-off valve.

6. A pressure control device based on a pressure control tank as defined in claim 1, characterized in that The automatic valve one (42) is located on the pipeline one (21); The automatic valve three (44) is located on the pipeline two (22).

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