Drainage device for coke discharge port of semi-coke furnace

Abstract

The utility model belongs to the technical field of semi-coke smelting, and particularly relates to a drainage device for a coke discharge port of a semi-coke furnace, which comprises an upper stock bin and a lower stock bin, the input end of the upper stock bin is connected with the output end of a scraper of the semi-coke furnace, and the solid phase output end of the lower stock bin is suspended above the input end of a conveying belt. An upper discharging valve is arranged between the output end of the upper stock bin and the input end of the lower stock bin, a lower discharging valve is arranged at the solid phase output end of the lower stock bin, and the liquid phase output end of the lower stock bin is connected with the lower liquid pool through a drainage pipe. The drainage pipe is additionally arranged to be connected with the liquid discharging pool, an independent drainage channel is formed, and pollution caused by the fact that sewage is directly discharged to the belt is avoided; meanwhile, water in the lower stock bin can be drained in time through the independent drainage channel, the soaking time of the semi-coke in the water is shortened, the situations that the strength of the semi-coke is reduced and the semi-coke is broken due to soaking and chemical components react with the water and deteriorate are reduced, and the quality of the semi-coke is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of semi-coke smelting technology, specifically relating to a drainage device for the coke discharge port of a semi-coke furnace. Background Technology

[0002] Currently, the semi-coke industry generally adopts the wet quenching process. After wet quenching, the semi-coke enters the buffer chamber through a scraper conveyor. The semi-coke will carry a lot of moisture into the buffer chamber. However, long-term soaking of semi-coke in water will cause many problems, such as the semi-coke being easy to break and the loss or deterioration of effective components such as fixed carbon in the semi-coke.

[0003] In the current production process of semi-coke, in order to achieve rapid drainage and avoid the problem of semi-coke being soaked in water for a long time, the valve at the bottom of the buffer silo is not strictly closed, leaving a certain gap so that the water in it can continuously fall onto the conveyor belt, thereby reducing the water content in the buffer silo.

[0004] However, the water discharged from the valve gap onto the belt is not clean water, and therefore will cause some pollution to the environment. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a drainage device for the coke oven discharge port. By adding a drainage pipe connected to the lower liquid pool, an independent drainage channel is formed, changing the traditional method of relying on the valve gaps at the bottom of the buffer hopper for drainage. This avoids the pollution of the environment caused by sewage discharged from the valve gaps onto the conveyor belt. At the same time, the independent drainage channel can promptly drain the water in the lower hopper, reducing the soaking time of the semi-coke in water. This reduces the occurrence of strength reduction, breakage, and deterioration of the semi-coke due to the reaction of chemical components with water caused by soaking, thus ensuring the quality of the semi-coke.

[0006] The specific technical solution adopted in this utility model is as follows:

[0007] A drainage device for the coke oven discharge port includes an upper silo and a lower silo. The input end of the upper silo is connected to the output end of the coke oven scraper conveyor. The solid output end of the lower silo is suspended above the input end of the conveyor belt. An upper discharge valve is provided between the output end of the upper silo and the input end of the lower silo. A lower discharge valve is provided at the solid output end of the lower silo. The liquid output end of the lower silo is connected to a lower liquid pool via a drain pipe.

[0008] The liquid phase inlet of the drain pipe is located near the bottom of the lower silo, a filter screen is installed at the liquid phase inlet of the drain pipe, a drain valve is installed at the liquid phase outlet of the drain pipe, and a nitrogen valve is installed at the gas phase inlet of the drain pipe.

[0009] A water seal trough is also provided between the liquid phase output end of the drain pipe and the lower liquid tank. The liquid phase output end of the drain pipe is located near the bottom of the water seal trough via a lower insertion pipe. The liquid phase output end of the water seal trough near its top is connected to the lower liquid tank via an overflow valve.

[0010] The top of the water seal tank is connected to the production water system via a primary water valve, forming the cleaning input end of the water seal tank. The bottom of the water seal tank is equipped with a cleaning valve, forming the cleaning output end of the water seal tank. The top of the water seal tank is also equipped with an exhaust gas valve, forming the gas phase output end of the water seal tank. The bottom of the water seal tank is also equipped with a cleaning port.

[0011] The liquid phase output end of the lower liquid tank is connected to the clarification tank via a slurry pump. The input end of the slurry pump is located near the bottom of the lower liquid tank. A drain valve is also installed between the slurry pump and the clarification tank.

[0012] The beneficial effects of this utility model are:

[0013] 1. In this utility model, a drainage pipe is added and connected to the lower liquid tank, forming an independent drainage channel. This changes the traditional method of relying on the valve gaps at the bottom of the buffer bin for drainage, avoiding the pollution of the environment caused by sewage discharged from the valve gaps onto the conveyor belt. At the same time, the independent drainage channel can drain the water in the lower hopper in a timely manner, reducing the soaking time of the semi-coke in water and preventing problems such as reduced strength, breakage, and deterioration of the semi-coke due to the reaction of chemical components with water caused by soaking, thus ensuring the quality of the semi-coke.

[0014] 2. This utility model also includes a water seal trough. During the drainage process, the sewage and the small amount of coal gas it carries enter the water seal trough along the lower insertion pipe. Relying on the liquid level in the water seal trough, a liquid seal is formed on the drainage pipe to prevent the coal gas in the lower silo from entering the water seal trough, thereby preventing the coal gas from leaking into the environment from the water seal. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the system of this utility model;

[0016] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0018] Specific embodiments, such as Figure 1As shown, this utility model provides a drainage device for the coke oven discharge port, including an upper silo and a lower silo. The input end of the upper silo is connected to the output end of the coke oven scraper conveyor. The solid phase output end of the lower silo is suspended above the input end of the conveyor belt. An upper discharge valve is provided between the output end of the upper silo and the input end of the lower silo. A lower discharge valve is provided at the solid phase output end of the lower silo. The liquid phase output end of the lower silo is connected to the lower liquid pool via a drain pipe.

[0019] Currently, in the production process of semi-coke, to achieve rapid drainage and avoid the problem of semi-coke being soaked in water for a long time, the valve at the bottom of the buffer silo is not tightly closed, leaving a certain gap so that water can continuously drip onto the conveyor belt, thereby reducing the water content in the buffer silo. However, the water drained from the valve gap onto the conveyor belt is not clean water, and therefore causes some pollution to the environment.

[0020] Therefore, this utility model adds a drainage pipe connected to the lower liquid tank, forming an independent drainage channel. This changes the traditional method of relying on the valve gaps at the bottom of the buffer bin for drainage, avoiding the pollution of the environment caused by sewage discharged from the valve gaps onto the conveyor belt. At the same time, the independent drainage channel can drain the water in the lower hopper in a timely manner, reducing the soaking time of semi-coke in water, reducing the occurrence of strength reduction, breakage, and deterioration of semi-coke due to the reaction of chemical components with water caused by soaking, and ensuring the quality of semi-coke.

[0021] The drainage process is as follows:

[0022] S1. The semi-coke from the scraper conveyor is first buffered in the upper silo, and the upper discharge valve is closed at this time.

[0023] S2. After the semi-coke in the upper silo has accumulated for a certain period of time, the upper discharge valve is opened and the semi-coke falls into the lower silo. At this time, the lower discharge valve is closed.

[0024] S3. After the semi-coke in the lower silo has been buffered for a period of time, close the upper discharge valve and open the lower discharge valve so that the semi-coke in the lower silo falls onto the conveyor belt.

[0025] S4. Close the lower discharge valve and then open the upper discharge valve to allow the next batch of semi-coke temporarily stored in the upper silo to enter the lower silo, forming a circulating drainage.

[0026] In step S2, during the process of semi-coke being stored in the lower silo, moisture will gradually accumulate at the bottom of the lower silo. The accumulated moisture will be discharged through the drain pipe, and the discharged wastewater will enter the lower liquid pool for purification and recycling, thus avoiding the problem of direct discharge causing environmental pollution.

[0027] like Figure 2As shown, the liquid phase inlet of the drain pipe is located near the bottom of the lower silo, a filter screen is installed at the liquid phase inlet, a drain valve is installed at the liquid phase outlet, and a nitrogen valve is installed at the gas phase inlet. The filter screen in this invention can intercept the semi-coke in the lower silo, preventing it from being discharged along with the wastewater through the drain pipe.

[0028] During normal operation, the drain valve is in the open position and the nitrogen valve is in the closed position.

[0029] After step S3 is completed and before step S4 is performed, the drain valve is closed and the nitrogen valve is opened to backflush the filter screen to prevent coke particles with a diameter close to the pore size of the filter screen from clogging it. After the backflush is completed, the nitrogen valve is closed and the drain valve is opened, and then step S4 is performed.

[0030] like Figure 1 As shown, a water seal trough is also provided between the liquid phase output end of the drain pipe and the lower liquid tank. The liquid phase output end of the drain pipe is located near the bottom of the water seal trough via a lower insertion pipe. The liquid phase output end of the water seal trough near its top is connected to the lower liquid tank via an overflow valve.

[0031] During the process of semi-coke being stored in the lower silo, the water at the bottom passes through the filter screen, along the drain pipe, and enters the water seal tank through the drain valve. Due to the influx of water, the water in the water seal tank exceeds the overflow pipe level and enters the lower liquid pool through the overflow pipe valve.

[0032] During the drainage process in step S2, the sewage and the small amount of coal gas it carries enter the water seal tank through the lower insertion pipe. The liquid level in the water seal tank forms a liquid seal on the drainage pipe, preventing the coal gas in the lower silo from entering the water seal tank, thus avoiding the leakage of coal gas into the environment from the water seal. The coal gas in the lower silo is collected by a special exhaust gas collection system to avoid environmental pollution caused by coal gas.

[0033] like Figure 1 As shown, the top of the water seal tank is connected to the production water system via a primary water valve and forms the cleaning input end of the water seal tank. The bottom of the water seal tank is provided with a cleaning valve to form the cleaning output end of the water seal tank. The top of the water seal tank is also provided with an exhaust gas valve to form the gas phase output end of the water seal tank. The bottom of the water seal tank is also provided with a cleaning port.

[0034] During normal operation, the primary water valve and cleaning valve are closed, and are only opened during maintenance and cleaning to flush and drain the liquid; the cleaning port is only used to clean the inside of the water seal tank when flushing is not possible or when there is too much sediment in the water seal tank.

[0035] During normal operation, the exhaust valve is in the open position, allowing any gas that may be present in the water seal tank to enter the exhaust system and prevent the water seal from becoming pressurized.

[0036] like Figure 1 As shown, the liquid phase output end of the lower liquid tank is connected to the clarification water tank via a slurry pump. The input end of the slurry pump is located near the bottom of the lower liquid tank, and a drain valve is also installed between the slurry pump and the clarification water tank. When the liquid level in the lower liquid tank reaches a certain height, the level gauge interlocks with the slurry pump to discharge water to the semi-coke clarification water tank for recycling. During normal operation, the drain valve is in the open position, allowing water in the lower liquid tank to be smoothly discharged by the slurry pump.

Claims

1. A drainage device for the coke discharge port of a semi-coke oven, comprising an upper hopper and a lower hopper, wherein the input end of the upper hopper is connected to the output end of the semi-coke oven scraper conveyor, and the solid output end of the lower hopper is suspended above the input end of the conveyor belt, characterized in that, An upper discharge valve is provided between the output end of the upper silo and the input end of the lower silo. A lower discharge valve is provided at the solid phase output end of the lower silo. The liquid phase output end of the lower silo is connected to the lower liquid pool via a drain pipe.

2. The coke oven exhaust port drainage device according to claim 1, characterized in that, The liquid phase inlet of the drain pipe is located near the bottom of the lower silo, a filter screen is installed at the liquid phase inlet of the drain pipe, a drain valve is installed at the liquid phase outlet of the drain pipe, and a nitrogen valve is installed at the gas phase inlet of the drain pipe.

3. The coke oven exhaust port drainage device according to claim 1, characterized in that, A water seal trough is also provided between the liquid phase output end of the drain pipe and the lower liquid tank. The liquid phase output end of the drain pipe is located near the bottom of the water seal trough via a lower insertion pipe. The liquid phase output end of the water seal trough near its top is connected to the lower liquid tank via an overflow valve.

4. The coke oven exhaust port drainage device according to claim 3, characterized in that, The top of the water seal tank is connected to the production water system via a primary water valve, forming the cleaning input end of the water seal tank. The bottom of the water seal tank is equipped with a cleaning valve, forming the cleaning output end of the water seal tank. The top of the water seal tank is also equipped with an exhaust gas valve, forming the gas phase output end of the water seal tank. The bottom of the water seal tank is also equipped with a cleaning port.

5. The coke oven exhaust port drainage device according to claim 1, characterized in that, The liquid phase output end of the lower liquid tank is connected to the clarification tank via a slurry pump. The input end of the slurry pump is located near the bottom of the lower liquid tank. A drain valve is also installed between the slurry pump and the clarification tank.

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