Coke oven water seal circulating water system

Abstract

The utility model discloses a coke oven water seal circulating water system, which is characterized in that a water outlet of a steam pocket is connected with water inlets of an ascending pipe water seal and a furnace top smoke guide hole water seal through pipelines, and drain valves are arranged on the pipelines between the steam pocket and the ascending pipe water seal and between the steam pocket and the furnace top smoke guide hole water seal; an electromagnetic valve is mounted at a water replenishing port of the circulating water tank; and gas detectors are mounted near the ascending pipe water seal and the furnace top smoke guide hole water seal. Condensate of the steam pocket is regularly discharged into the water seal of the ascending pipe and the water seal of the smoke guide hole in the furnace top through the discharge valve to serve as replenishing water of circulating water, and the water replenishing amount is reduced; when the gas detector detects that carbon monoxide and benzopyrene in the gas exceed the standard, the electromagnetic valve is opened, desalted water is supplemented into the circulating water tank, it is ensured that the water seal of the ascending pipe and the water seal of the furnace top smoke guide hole have enough circulating water for sealing, and leakage of a large amount of raw gas is avoided.

Description

Technical fields:

[0001] This utility model relates to the field of coke production, specifically to a coke oven water seal circulating water system. Background technology:

[0002] In the coke oven, the main equipment used in coke production, there are two main water seals: the riser pipe water seal and the top flue gas vent water seal. The coke oven riser pipe connects the carbonization chamber and the gas collecting pipe. The circulating water system is connected to the riser pipe water seal through pipes, supplying circulating water to the riser pipe water seal to form a liquid seal and prevent the leakage of raw coal gas. The top flue gas vent is used to prevent abnormal pressure rise in the carbonization chamber during coal charging. It guides the raw coal gas generated in the coal charging hole to the auxiliary hole through the flue gas vent car. During the coking process after coal charging, the top flue gas vent needs to be sealed with a water seal to prevent the leakage of raw coal gas.

[0003] In actual production, the riser pipe water seal and the furnace top flue gas vent water seal require a circulating water system for water supply. Often, because the circulating water in the riser pipe water seal and the furnace top flue gas vent water seal is at a high temperature, a large amount of water will evaporate into the atmosphere. Therefore, it is necessary to replenish the circulating water system frequently. If the circulating water system cannot be replenished in time, gas leakage will occur due to the failure of the water seal. Utility Model Content:

[0004] The purpose of this invention is to provide a coke oven water seal circulating water system.

[0005] This utility model is implemented by the following technical solution:

[0006] A coke oven water seal circulating water system includes a circulating water tank. The outlet of the circulating water tank is connected to the inlet of a circulating pump. The outlet of the circulating pump is connected to the inlets of a riser pipe water seal and a furnace top flue gas guide hole water seal. The outlets of the riser pipe water seal and the furnace top flue gas guide hole water seal are connected to the return water inlet of the circulating water tank. The water supply inlet of the circulating water tank is connected to a water supply pipe, which is also connected to the water supply inlet of a steam drum. The outlet of the steam drum is connected to the inlet of a riser pipe heat exchanger. The steam outlet of the riser pipe heat exchanger is connected to the steam inlet of the steam drum. The steam outlet of the steam drum is connected to a superheated steam pipe. The outlet of the steam drum is also connected to the inlets of the riser pipe water seal and the furnace top flue gas guide hole water seal via a pipeline. A discharge valve is installed on the pipeline between the steam drum and the riser pipe water seal and the furnace top flue gas guide hole water seal.

[0007] A solenoid valve is installed at the water inlet of the circulating water tank, and gas detectors are installed near the water seal of the riser pipe and the water seal of the flue gas duct at the top of the furnace. The signal output terminal of the gas detector is electrically connected to the signal input terminal of the solenoid valve.

[0008] Preferably, the circulating water tank is divided into an inlet area and a clear water area. The overflow port of the inlet area is connected to the clear water area. The return water port of the circulating water tank is located in the inlet area, and the outlet and water supply port of the circulating water tank are located in the clear water area.

[0009] Preferably, a sludge discharge pipe is connected to the bottom of the water inlet area of ​​the circulating water tank.

[0010] The advantages of this invention are as follows: the condensate from the steam drum is periodically discharged through the discharge valve into the riser pipe water seal and the furnace top flue gas vent water seal as replenishment water for the circulating water, reducing the amount of replenishment water; the gas detector is used to detect the gas content near the riser pipe water seal and the furnace top flue gas vent water seal. When the gas detector detects that the carbon monoxide and benzo[a]pyrene in the gas exceed the standard, the solenoid valve opens and demineralized water is added to the circulating water tank to ensure that the riser pipe water seal and the furnace top flue gas vent water seal have enough circulating water for sealing, thus preventing a large amount of raw coal gas from leaking out. Attached image description:

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] In the diagram: 1. Circulating water tank, 1.1. Inlet water zone, 1.2. Clear water zone, 1.3. Sludge discharge pipe, 2. Circulating pump, 3. Water seal of riser pipe, 4. Water seal of flue gas duct at the top of the furnace, 5. Water supply pipe, 6. Steam drum, 7. Heat exchanger of riser pipe, 8. Superheated steam pipe, 9. Discharge valve, 10. Solenoid valve, 11. Gas detector. Detailed implementation method:

[0013] like Figure 1 As shown, a coke oven water seal circulating water system includes a circulating water tank 1. The outlet of the circulating water tank 1 is connected to the inlet of a circulating pump 2. The outlet of the circulating pump 2 is connected to the inlets of a riser pipe water seal 3 and a furnace top flue gas guide hole water seal 4, respectively. The outlets of the riser pipe water seal 3 and the furnace top flue gas guide hole water seal 4 are connected to the return water inlet of the circulating water tank 1. The water supply inlet of the circulating water tank 1 is connected to a water supply pipe 5, which is also connected to the water supply inlet of a steam drum 6. The outlet of the steam drum 6 is connected to the inlet of a riser pipe heat exchanger 7. The steam outlet of the riser pipe heat exchanger 7 is connected to the steam inlet of the steam drum 6. The steam outlet of the steam drum 6 is connected to a superheated steam pipe 8. The outlet of the steam drum 6 is also connected to the inlets of the riser pipe water seal 3 and the furnace top flue gas guide hole water seal 4 via a pipe. A discharge valve 9 is installed on the pipe between the steam drum 6 and the riser pipe water seal 3 and the furnace top flue gas guide hole water seal 4.

[0014] A solenoid valve 10 is installed at the water inlet of the circulating water tank 1. Gas detectors 11 are installed near the riser pipe water seal 3 and the furnace top flue gas guide hole water seal 4. The signal output terminal of the gas detector 11 is electrically connected to the signal input terminal of the solenoid valve 10.

[0015] During operation, the circulating pump 2 draws circulating water from the circulating water tank 1 to the riser pipe water seal 3 and the furnace top flue gas vent water seal 4 for sealing. After a portion of the water evaporates at high temperature, the remaining water flows back to the circulating water tank 1. During the waste heat recovery process of the riser pipe, demineralized water is sent from the bottom of the steam drum 6 into the riser pipe heat exchanger 7, heated into steam, and returned to the steam drum 6. In the steam drum 6, gas-liquid separation takes place. The steam is discharged from the steam outlet to the superheated steam pipe 8, which connects to the steam system pipeline. The condensate is sent back to the riser pipe heat exchanger 7 from the bottom of the steam drum 6. Since the steam drum 6 needs to discharge wastewater periodically, some of the condensate from the steam drum 6 is periodically discharged through the discharge valve 9 into the riser pipe water seal 3 and the furnace top flue gas vent water seal 4 as makeup water for the circulating water. The makeup water for the steam drum 6 is supplied through the makeup water pipe 5.

[0016] Gas detector 11 is used to detect the gas content near the riser pipe water seal 3 and the furnace top flue gas vent water seal 4. If the water seal fails due to insufficient circulating water, raw coal gas will leak. Gas detector 11 will detect that carbon monoxide and benzo[a]pyrene in the gas exceed the standard and send a signal to solenoid valve 10. Solenoid valve 10 opens and replenishes demineralized water into circulating water tank 1 to ensure that the riser pipe water seal 3 and the furnace top flue gas vent water seal 4 have enough circulating water to seal and prevent a large amount of raw coal gas from leaking. After the gas detector 11 detects that it is normal, 10 minutes later, solenoid valve 10 closes and cuts off the water supply.

[0017] The circulating water tank 1 is divided into an inlet zone 1.1 and a clear water zone 1.2. The overflow port of the inlet zone 1.1 is connected to the clear water zone 1.2. The return water port of the circulating water tank 1 is located in the inlet zone 1.1, and the outlet and water supply port of the circulating water tank 1 are located in the clear water zone 1.2. The riser pipe water seal 3 and the furnace top flue gas guide hole water seal 4 are both open water seals. Therefore, during the return flow, sediment will be carried back to the inlet zone 1.1 and overflowed into the clear water zone 1.2 for circulation, avoiding pipe blockage.

[0018] A sludge discharge pipe 1.3 is connected to the bottom of the inlet area 1.1 of the circulating water tank 1. The sludge at the bottom of the circulating water tank 1 is discharged periodically through the sludge discharge pipe 1.3.

[0019] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A coke oven water seal circulating water system, characterized in that, The system includes a circulating water tank, the outlet of which is connected to the inlet of a circulating pump. The outlet of the circulating pump is connected to the inlets of the riser pipe water seal and the furnace top flue gas guide hole water seal, respectively. The outlets of the riser pipe water seal and the furnace top flue gas guide hole water seal are connected to the return water inlet of the circulating water tank. The water supply inlet of the circulating water tank is connected to a water supply pipe, which is also connected to the water supply inlet of the steam drum. The outlet of the steam drum is connected to the inlet of the riser pipe heat exchanger, the steam outlet of the riser pipe heat exchanger is connected to the steam inlet of the steam drum, and the steam outlet of the steam drum is connected to a superheated steam pipe. The outlet of the steam drum is also connected to the inlets of the riser pipe water seal and the furnace top flue gas guide hole water seal via a pipeline. A discharge valve is installed on the pipeline between the steam drum and the riser pipe water seal and the furnace top flue gas guide hole water seal. A solenoid valve is installed at the water inlet of the circulating water tank, and gas detectors are installed near the water seal of the riser pipe and the water seal of the flue gas duct at the top of the furnace. The signal output terminal of the gas detector is electrically connected to the signal input terminal of the solenoid valve.

2. The coke oven water seal circulating water system according to claim 1, characterized in that, The circulating water tank is divided into an inlet area and a clear water area. The overflow port of the inlet area is connected to the clear water area. The return water port of the circulating water tank is located in the inlet area, and the outlet and water supply port of the circulating water tank are located in the clear water area.

3. The coke oven water seal circulating water system according to claim 2, characterized in that, A sludge drain pipe is connected to the bottom of the inlet area of ​​the circulating water tank.

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