A pre-reforming air drying tower anti-sulfur dioxide leakage system

Abstract

The utility model discloses a kind of pre-conversion air drying tower prevent sulfur dioxide leakage systems, including main system drying tower and air drying tower, further including control switch module, automatic control valve one is installed on air pipe, the output of air blower is further fixedly connected with branch pipe, branch pipe is connected with the air inlet of main system drying tower, automatic control valve two is installed on branch pipe, control switch module and automatic control valve two and automatic control valve one are electrically connected, air drying tower and the air inlet of air blower are installed with negative pressure sensor, negative pressure sensor and control switch module are electrically connected.When air blower trips, negative pressure sensor detects that the air inlet negative pressure environment loss of air drying tower and air blower, signal will be sent with control switch module, control switch module will immediately interlock close pneumatic valve one, and open pneumatic valve two, realize air drying tower import negative pressure state by main system blower, prevent sulfur dioxide overflow.

Description

Technical Field

[0001] This utility model relates to the field of sulfur dioxide prevention technology in air drying towers, and in particular to a sulfur dioxide leakage prevention system for pre-conversion air drying towers. Background Technology

[0002] The existing pre-conversion and pre-absorption system introduces a portion of the flue gas from the SO2 blower outlet of the main system into the pre-conversion and pre-absorption system for pre-conversion and pre-absorption. Then, using a newly added relay blower, the pre-absorbed flue gas is sent back to the SO2 blower outlet of the main system to mix with the remaining flue gas that did not enter the pre-conversion and pre-absorption system, and then sent together into the main conversion system for conversion.

[0003] However, when the air blower malfunctions and the negative pressure environment is lost, the SO2 gas in the system will leak out through the air intake of the air drying tower, causing environmental pollution. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model designs a pre-conversion air drying tower sulfur dioxide leakage prevention system.

[0005] The present invention adopts the following technical solution: A system for preventing sulfur dioxide leakage from a pre-conversion air drying tower includes a main system drying tower and an air drying tower. A main system fan is installed at the outlet of the main system drying tower, and a main pipe is fixedly connected to the outlet of the main system fan. One end of the main pipe is connected to the air inlet of the main conversion system. An air fan is fixedly installed at the outlet of the air drying tower, and an air pipe is fixedly connected to the outlet of the air fan. A pre-conversion absorption treatment system is fixedly installed at one end of the air pipe. A relay fan is fixedly installed at the outlet of the pre-conversion absorption treatment system, and a manifold is fixedly installed at the outlet of the relay fan. One end of the manifold is connected to the end of the main pipe closest to the main conversion system. The main pipe is connected to a suction pipe at the end near the main system fan, and the suction pipe is connected to the end of the air pipe near the pre-conversion absorption treatment system. The pre-conversion air drying tower sulfur dioxide leakage prevention system also includes a control switch module. An automatic control valve one is installed on the air pipe. The output port of the air fan is also fixedly connected to a branch pipe, which is connected to the air inlet of the main system drying tower. An automatic control valve two is installed on the branch pipe. The control switch module is electrically connected to both automatic control valve two and automatic control valve one. Negative pressure sensors are installed at the air inlets of the air drying tower and the air fan. The negative pressure sensors are electrically connected to the control switch module.

[0006] Preferably, a check valve is also installed on the air pipe. The check valve is used to prevent airflow from flowing back from the air pipe.

[0007] Preferably, the automatic control valve one and the automatic control valve two are pneumatic valves.

[0008] Preferably, a sulfur dioxide concentration detector is installed at the inlet of the pre-conversion treatment absorption system, and the air fan has multiple adjustable speed settings. Based on the concentration feedback from the sulfur dioxide concentration detector, the sulfur dioxide concentration in the pre-conversion treatment absorption system can be adjusted by increasing or decreasing the speed of the air fan.

[0009] The beneficial effects of this utility model are as follows: This utility model designs a pre-conversion air drying tower anti-sulfur dioxide leakage system. When the air fan trips, the negative pressure sensor detects the loss of negative pressure environment at the air inlet of the air drying tower and the air fan, and sends a signal to the control switch module. The control switch module will immediately interlock and close pneumatic valve one and open pneumatic valve two, so as to achieve a negative pressure state at the air drying tower inlet through the main system fan, thus preventing sulfur dioxide from overflowing. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the system structure of this utility model.

[0011] In the diagram: 1. Main system drying tower; 2. Main system fan; 3. Main pipe; 4. Main conversion system; 5. Air drying tower; 6. Air fan; 7. Branch pipe; 8. Pneumatic valve 2; 9. Control switch module; 10. Air pipe; 11. Pneumatic valve 1; 12. Suction pipe; 13. Pre-conversion absorption treatment system; 14. Relay fan; 15. Combination pipe. Detailed Implementation

[0012] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings: Example: Figure 1 As shown, a pre-conversion air drying tower sulfur dioxide leakage prevention system includes a main system drying tower 1 and an air drying tower 5. A main system fan 2 is installed at the outlet of the main system drying tower 1. A main pipe 3 is fixedly connected to the output port of the main system fan 2. One end of the main pipe 3 is connected to the air inlet of the main conversion system 4. The flue gas from the main system enters the interior of the main system drying tower 1 through the air inlet and is dried. By starting the main system fan 2, the dried flue gas is transported to the interior of the main conversion system 4 through the main pipe 3 for desulfurization conversion. An air fan 6 is fixedly installed at the outlet of the air drying tower 5. An air pipe 10 is fixedly connected to the outlet of the air fan 6. A pre-conversion absorption treatment system 13 is fixedly installed at one end of the air pipe 10. A relay fan 14 is fixedly installed at the outlet of the pre-conversion absorption treatment system 13. A manifold 15 is fixedly installed at the outlet of the relay fan 14. One end of the manifold 15 is connected to the end of the main pipe 3 near the main conversion system 4. An air intake pipe 12 is also fixedly connected to the end of the main pipe 3 near the main system fan 2. The air intake pipe 12 is connected to the end of the air pipe 10 near the pre-conversion absorption treatment system 13. By starting the air blower 6, a negative pressure can be generated at the air inlet of the air drying tower 5, drawing air into the interior of the air drying tower 5 for drying. The dried air is then transported through the air pipe 10 to the interior of the pre-conversion absorption treatment system 13. When the air blower 6 is working, the dried flue gas in the air pipe 10 mixes with the dried flue gas in the main system through the suction pipe 12, and undergoes pre-conversion and pre-absorption through the pre-conversion absorption treatment system. The sulfur dioxide concentration in the pre-conversion absorption treatment system 13 can be adjusted by increasing or decreasing the speed of the air blower 6. Then, the pre-absorbed flue gas is sent into the main pipe 3 using the relay blower 14, where it mixes with the flue gas that has not entered the pre-conversion and pre-absorption systems, and is then sent together into the main conversion system 4 for conversion.

[0013] The output port of the air blower 6 is also fixedly connected to a branch pipe 7, which is connected to the air inlet of the main system drying tower 1. A pneumatic valve 8 is installed on the branch pipe 7. The device also includes a control switch module 9. A pneumatic valve 11 and a check valve are installed on the air pipe 10. The control switch module 9 is electrically connected to both the pneumatic valve 8 and the pneumatic valve 11. During normal operation, the pneumatic valve 11 is in the open state and the pneumatic valve 8 is in the closed state. Negative pressure sensors are installed at the air inlets of the air drying tower 5 and the air blower 6 to detect negative pressure. The negative pressure sensors are electrically connected to the control switch module 9. When the air blower 6 trips, the negative pressure sensor detects the loss of negative pressure environment at the air inlet of the air drying tower 5 and the air blower 6. It will send a signal to the control switch module 9, which will immediately interlock and close the pneumatic valve 11 and open the pneumatic valve 28. The main system fan 2 will then restore the negative pressure state at the inlet of the air drying tower 5 to prevent sulfur dioxide from overflowing.

[0014] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A sulfur dioxide leakage prevention system for a pre-conversion air drying tower, comprising a main system drying tower and an air drying tower, wherein a main system fan is installed at the outlet of the main system drying tower, and a main pipe is fixedly connected to the outlet of the main system fan, one end of the main pipe being connected to the air inlet of the main conversion system; an air fan is fixedly installed at the outlet of the air drying tower, and an air pipe is fixedly connected to the outlet of the air fan, a pre-conversion absorption treatment system is fixedly installed at one end of the air pipe, a relay fan is fixedly installed at the outlet of the pre-conversion absorption treatment system, a manifold is fixedly installed at the outlet of the relay fan, one end of the manifold is connected to the end of the main pipe near the main conversion system, and an air intake pipe is fixedly connected to the end of the main pipe near the main system fan, the air intake pipe being connected to the end of the air pipe near the pre-conversion absorption treatment system; characterized in that... The sulfur dioxide leakage prevention system of the pre-conversion air drying tower also includes a control switch module. An automatic control valve one is installed on the air pipe. The output port of the air fan is also fixedly connected to a branch pipe, which is connected to the air inlet of the main system drying tower. An automatic control valve two is installed on the branch pipe. The control switch module is electrically connected to both the automatic control valve two and the automatic control valve one. Negative pressure sensors are installed at the air inlets of the air drying tower and the air fan. The negative pressure sensors are electrically connected to the control switch module.

2. The pre-conversion air drying tower sulfur dioxide leakage prevention system according to claim 1, characterized in that, A check valve is also installed on the air pipe.

3. The pre-conversion air drying tower sulfur dioxide leakage prevention system according to claim 1, characterized in that, The automatic control valve one and automatic control valve two are pneumatic valves.

4. The pre-conversion air drying tower sulfur dioxide leakage prevention system according to claim 1, characterized in that, The inlet of the pre-conversion absorption system is equipped with a sulfur dioxide concentration detector, and the air fan has multiple adjustable speed settings.

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