Device and method for controlling volatile pollutants at coal charging ports

Abstract

The present invention relates to a device and method for treating volatile pollutants at a coal charging port, including a device main body, a retaining wall, and resistance sheets. The outer shape of the device main body matches the coal charging port and can cover and seal the coal charging port. An air outlet hole is provided at the upper end of the device main body, and a dropping hole and an air inlet hole are provided at the bottom of the device main body. The retaining wall is arranged above the dropping hole and the air inlet hole. Two air flow channels are provided at the upper end of the retaining wall and communicate with the air outlet hole. A cavity is formed between the bottom of the retaining wall and the dropping hole and the air inlet hole, and the cavity communicates with the air flow channels at the upper end of the retaining wall from both sides of the retaining wall. The resistance sheets are arranged in the air flow channels. The present invention burns volatile pollutants in the coal charging port device by heating the resistance, and only discharges water vapor and CO<subgt;2< / subgt;, reducing the direct escape of pollutants such as coal coke particles and volatile organic compounds. The present invention can replace and treat volatile pollutants.

Description

Technical Field

[0001] The present invention relates to the design and application of a coal charging port cover for a coke oven, and particularly to a device and method for controlling volatile pollutants at the coal charging port. Background Art

[0002] At present, most domestic coking plants still use top-loading coke ovens. Coking coal is added into the coke oven carbonization chamber from the coal charging ports at the top of the coke oven by a coal charging vehicle for coking. Each time coal is charged, even if a negative pressure liquid ammonia spraying device is adopted, a large amount of raw coke oven gas and residual coal at the furnace mouth still escape, forming a yellow smoke column, polluting the environment, which is called the "yellow dragon" by people. Calculated according to a coking time of 18 hours, a coking plant with four coke ovens adds coal 192 times a day, and the coal charging port is opened once every 7 - 8 minutes on average, which leads to long-term and large-scale dispersion of pollutants at the coke oven top, causing great harm to the environment and production workers. Although there have been a large number of improvements to the coal charging port cover in recent years, including increasing the tightness of the coal charging port cover and adding a cleaning device, the phenomenon of raw coke oven gas escaping has not been actually changed. Due to the high temperature of the coke oven itself, sealing materials cannot be used, and at the same time, in order to maintain the heat insulation of the coke oven, the form of water seal cannot be used, so how to reduce the escape of pollutants at the coal charging port has become a difficult problem in the industry.

[0003] Patent CN 211595514 U provides a split-type coal charging port cover for a coke oven, with heat insulation materials filled in the cavity, which can effectively prevent the shedding of heat insulation materials, isolate the inner lining heat insulation materials from high-temperature gas flow, improve the heat insulation effect, reduce the heat dissipation of the coke oven, and improve the operating environment at the coke oven top. Patent CN 211972207 U discloses a coal charging port cover for a coke oven, which is convenient for users to observe the coal inside the coal charging port without opening the entire coal charging port cover. Patent CN 209292286 U discloses a sand-sealing type coal charging port cover structure for a coke oven, which solves the problems of high heat conduction, large heat dissipation, and poor operating environment of the original metal coal charging port large cover and large cover ring seat components. However, there is currently a lack of corresponding technologies for solving volatile pollutants at the coal charging port. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and method for controlling volatile pollutants at the coal charging port in view of the problem in the prior art that volatile pollutants at the coal charging port during coal charging of a top-loading coke oven cannot be treated. By using the method of heating resistance, the volatile pollutants are burned inside the coal charging port device, and only water vapor and CO2 are discharged, reducing the direct escape of pollutants such as coal coke particles and volatile organic compounds.

[0005] To achieve the above purpose, the present invention is realized by adopting the following technical solutions:

[0006] A device for controlling volatile pollutants at the coal charging port, comprising a device main body, a retaining wall, and resistance sheets. The outer shape of the device main body matches the coal charging port and can cover and seal the coal charging port. An air outlet hole is provided at the upper end of the device main body, and a dropping hole and an air inlet hole are provided at the bottom of the device main body. The retaining wall is arranged above the dropping hole and the air inlet hole. Two air flow channels are provided at the upper end of the retaining wall and are communicated with the air outlet hole. A cavity is formed between the bottom of the retaining wall and the dropping hole and the air inlet hole, and the cavity is communicated with the air flow channels at the upper end of the retaining wall from both sides of the retaining wall. The resistance sheets are arranged in the air flow channels.

[0007] The lower end of the device main body is an arc shape downward, the dropping hole is at the middle position of the arc, and the air inlet holes are on both sides of the dropping hole.

[0008] Bolts are installed at the upper end of the device main body. The bolts are connected to the resistance sheets inward and to the power supply lines outward.

[0009] It further includes a moving frame. The moving frame is in an inverted T shape. The upper end of the device main body is connected with a sleeve through a bolt and is hung with the inverted T-shaped moving frame through the sleeve. The moving frame is installed on the coal charging vehicle, and a coal charging channel is provided in the middle of the moving frame.

[0010] The device main body is made of refractory material, and there is also a refractory material coating outside the device main body. The retaining wall is also made of refractory material.

[0011] The device is applied to the coal charging port of a top-loading coke oven.

[0012] The retaining wall is an inclined surface that slopes downward on both sides.

[0013] A method for using a device for controlling volatile pollutants at the coal charging port, including the following steps:

[0014] (1) Connect the air outlet hole to the coal charging vehicle through a pipeline. Move the coal charging vehicle, hook up and remove the coal charging port cover at the coal charging port of the carbonization chamber through the moving frame, move the coal charging channel on the moving frame to the coal charging port for coal charging, and then move the device for controlling volatile pollutants at the coal charging port to the coal charging port and cover the coal charging port.

[0015] (2) Connect the resistance sheets to the power supply.

[0016] (3) The volatile pollutants enter the device through the air inlet hole. The upward flow of the gas drives the coal powder particles to hit the retaining wall, and the coal powder particles fall back into the carbonization chamber through the dropping hole.

[0017] (4) The remaining gas rises to the air flow channels above the retaining wall. In the air flow channels, the resistance sheets are energized to heat and burn the volatile gas, and the burned gas enters the coal charging vehicle through the air outlet hole.

[0018] After the device works for 3 - 5 minutes, it is removed by the moving rack, and the coal charging port cover is covered well.

[0019] Compared with the existing technology, the beneficial effects of the present invention are:

[0020] The device and method for treating volatile pollutants at the coal charging port of the present invention utilize the heating resistance method to burn the volatile pollutants in the coal charging port device, and only water vapor and CO2 are discharged, reducing the direct escape of pollutants such as coal coke particles and volatile organic compounds. The present invention can replace and treat volatile pollutants.

[0021] The present invention ignites volatile pollutants through resistance sheets, reduces unorganized emissions, and enables the unorganized emissions at the coal charging port to meet the environmental protection requirements;

[0022] The present invention is connected to the moving rack tube fixed on the coal charging in a hanging manner. First, it is convenient to replace and use with the coal charging port cover. Second, it is convenient to replace and clean at any time; the resistance sheet can also be repaired at any time when it is damaged;

[0023] The present invention only works at the coal charging port for 3 - 5 minutes, so it does not require a fine structure and an extraordinary heat preservation effect, saving costs. Description of the Drawings

[0024] Figure 1 is the structural schematic diagram of the device of the present invention;

[0025] Figure 2 is the structural schematic diagram of the moving rack in the present invention.

[0026] Figure 1 In the figure: 1 - air outlet, 2 - device main body, 3 - air flow channel, 4 - air inlet hole, 5 - dropping hole, 6 - retaining wall, 7 - resistance sheet, 8 - bolt, 9 - sleeve, 10 - coal charging port cover, 11 - device for treating volatile pollutants at the coal charging port, 12 - moving rack. Detailed Embodiments

[0027] The following further describes the detailed embodiments of the present invention with reference to the drawings:

[0028] See Figure 1, A device for controlling volatile pollutants at the coal charging port, comprising a device main body 2, a retaining wall 6, and resistance sheets 7. The outer shape of the device main body 2 matches that of the coal charging port and can cover and seal the coal charging port. An air outlet hole 1 is provided at the upper end of the device main body 2, and a dropping hole 5 and an air inlet hole 4 are provided at the bottom of the device main body 2. The retaining wall 6 is arranged above the dropping hole 5 and the air inlet hole 4. Two air flow channels 3 are provided at the upper end of the retaining wall 6 and are communicated with the air outlet hole 1. A cavity is formed between the bottom of the retaining wall 6 and the dropping hole 5 and the air inlet hole 4, and this cavity is communicated with the air flow channels 3 at the upper end of the retaining wall 6 from both sides of the retaining wall 6. The resistance sheets 7 are arranged in the air flow channels 3.

[0029] The lower end of the device main body 2 is an arc-shaped downward, the dropping hole 5 is at the middle position of the arc, and the air inlet hole 4 is on both sides of the dropping hole.

[0030] Bolts 8 are installed at the upper end of the device main body 2. The bolts 8 are connected to the resistance sheets 7 inwardly and to the power supply line outwardly.

[0031] Internal threaded pipes can be embedded in the refractory material main body for connecting bolts. The bolts are connected to the resistance sheets inwardly and to the wires outwardly. At the same time, the bolts can also be used to connect the sleeves 9, and insulation is done at the connection between the bolts 8 and the wires.

[0032] It further includes a mobile frame 12. The mobile frame 12 is in an inverted T shape. The upper end of the device main body 2 is connected to a sleeve 9 through bolts 8 and is hung on the inverted T-shaped mobile frame through the sleeve 9. The mobile frame 12 is installed on the coal charging vehicle, and a coal charging channel is provided in the middle of the mobile frame 12.

[0033] The device main body 2 is made of refractory material, and there is also a refractory material coating on the outside of the device main body 2. The retaining wall 7 is also made of refractory material.

[0034] The device is applied to the coal charging port of a top-charging coke oven.

[0035] The retaining wall 7 is a slope that slopes downward on both sides.

[0036] The external dimensions of the device main body 2 match those of the coal charging port, and a peripheral sealing state can be achieved. Only the air outlet hole is connected to the coal charging vehicle.

[0037] The air inlet hole 4 can enable the pollutants that escape under high pressure to enter the device; a dropping hole 5 is provided in the middle of the lower part, and the pulverized coal particles can fall back into the carbonization chamber; an air outlet hole 1 is provided at the upper part and is connected to the coal charging vehicle, and the gas after combustion can be collected and discharged.

[0038] A retaining wall 6 is provided above the air inlet 4, which can cause the pulverized coal particles and part of the gas to change direction at the retaining wall 6 and fall back into the carbonization chamber from the dropping hole;

[0039] There are two air flow channels 3 provided on the side wall and upper edge of the retaining wall 6. The heating of the resistance sheet 7 can ignite the volatile gas, and the combusted gas enters the coal charging car through the air outlet hole 1.

[0040] A method for using a device for treating volatile pollutants at the coal charging port includes the following steps:

[0041] (1) Connect the air outlet hole 1 to the coal charging car through a pipeline. Move the coal charging car, hook and remove the coal charging port cover 10 at the coal charging port of the carbonization chamber through the moving frame 12. Move the coal charging channel on the moving frame 12 to the coal charging port for coal charging. Then move the device 11 for treating volatile pollutants at the coal charging port to the coal charging port and cover the coal charging port.

[0042] A sleeve 9 can be connected to the upper end of the coal charging port cover 10 that can be used in cooperation with the present invention.

[0043] (2) Connect the resistance sheet 7 to a power source.

[0044] (3) The volatile pollutants enter the device through the air inlet hole 4. The upward flow of the gas drives the pulverized coal particles to hit the retaining wall 6, and the pulverized coal particles fall back into the carbonization chamber through the dropping hole 5.

[0045] (4) The remaining gas rises to the air flow channel 3 above the retaining wall 6. In the air flow channel 3, the resistance sheet 7 is energized to heat and burn the volatile gas. The water vapor and CO2 after combustion enter the coal charging car through the air outlet hole 1 and then undergo subsequent treatment.

[0046] (5) After the device works for 3 - 5 minutes, move it away through the moving frame 12 and cover the coal charging port cover 10.

Claims

1. An apparatus for treating volatile pollutants at a coal charging port, characterized in that, It includes a device body, a retaining wall, and resistance chips. The outer shape of the device body matches the coal charging opening and can cover and seal the coal charging opening. An air outlet hole is provided at the upper end of the device body, and a dropping hole and an air inlet hole are provided at the bottom of the device body. The retaining wall is arranged above the dropping hole and the air inlet hole. Two air flow channels are provided at the upper end of the retaining wall and are communicated with the air outlet hole. A cavity is formed between the bottom of the retaining wall and the dropping hole and the air inlet hole, and the cavity is communicated with the air flow channels at the upper end of the retaining wall from both sides of the retaining wall. The resistance chips are arranged in the air flow channels.

2. The device for controlling volatile pollutants at the coal charging port according to claim 1, characterized in that, The lower end of the device body is an arc-shaped downward, the dropping hole is in the middle position of the arc, and the air inlet holes are on both sides of the dropping hole.

3. The device for controlling volatile pollutants at the coal charging port according to claim 1, wherein, Bolts are installed at the upper end of the device body. The bolts are connected to the resistance chips inwardly and to the power supply lines outwardly.

4. A device for controlling volatile pollutants at the coal charging port according to any one of claims 1 to 3, characterized in that It further includes a moving frame. The moving frame is in an inverted T shape. The upper end of the device body is connected with a sleeve through a bolt and is hung with the inverted T-shaped moving frame through the sleeve. The moving frame is installed on the coal charging vehicle, and a coal charging channel is provided in the middle of the moving frame.

5. A device for treating volatile pollutants at a coal charging port according to any one of claims 1-3, characterized in that, The device body is made of refractory material, and there is also a refractory material coating outside the device body. The retaining wall is also made of refractory material.

6. The device for controlling volatile pollutants at the coal charging port according to claim 1, wherein The device is applied to the coal charging opening of a top-charging coke oven.

7. The device for treating volatile pollutants at the coal charging port according to claim 1, characterized in that, The retaining wall is an inclined surface that slopes downward on both sides.

8. A method for using the device for treating volatile pollutants at the coal charging port according to any one of claims 1 to 7, characterized in that, It includes the following method: (1) Connect the air outlet hole to the coal charging vehicle through a pipeline, move the coal charging vehicle, hook and remove the coal charging opening cover at the coal charging opening of the coking chamber through the moving frame, move the coal charging channel on the moving frame to the coal charging opening for coal charging, then move the device for treating volatile pollutants at the coal charging opening to the coal charging opening and cover the coal charging opening. (2) Connect the resistance chips to the power supply. (3) The volatile pollutants enter the device through the air inlet hole, and the upward flow of the gas drives the pulverized coal particles to hit the retaining wall, and the pulverized coal particles fall back into the coking chamber through the dropping hole. (4) The remaining gas rises to the air flow channels above the retaining wall. In the air flow channels, the resistance chips are energized to heat and burn the volatile gas, and the burned gas enters the coal charging vehicle through the air outlet hole. (5) After the device works for 3 - 5 minutes, remove it through the moving frame and cover the coal charging opening cover well.

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