阅读说明：本技术 一种减少焦炉装煤过程二氧化硫排放的装置及方法 (Device and method for reducing sulfur dioxide emission in coal charging process of coke oven ) 是由 王满 王付巧执 于 2019-11-01 设计创作，主要内容包括：本发明涉及一种减少焦炉装煤过程二氧化硫排放的装置及方法,所述装置包括分别安装在机侧炉门及焦侧炉门处的气幕装置；焦炉的机侧炉门、焦侧炉门的炉门框至少有一侧在朝向炭化室中心的一侧沿高向设置气幕出风口,由气幕出风口吹出气体形成气幕将炭化室内部空间与外部大气环境完全隔断。本发明能够避免或减少焦炉出焦过程中外界空气进入炭化室,从而保持炭化室内为无氧或缺氧环境,从而避免装煤时入炉煤与炭化室内存留的氧气发生燃烧而产生SO<Sub>2</Sub>,从源头上避免SO<Sub>2</Sub>超标排放对环境的污染,提高炼焦生产过程的环保水平。(The invention relates to a device and a method for reducing sulfur dioxide emission in the coal charging process of a coke oven, wherein the device comprises gas curtain devices which are respectively arranged at a machine side oven door and a coke side oven door; at least one side of the oven door frame of the oven side door and the oven side door of the coke oven is provided with an air curtain air outlet along the height direction at one side facing the center of the carbonization chamber, and the air curtain is formed by blowing air from the air curtain air outlet to completely separate the inner space of the carbonization chamber from the external atmospheric environment. The invention can prevent or reduce the external air from entering the coking chamber in the coke discharging process of the coke oven, thereby maintaining the anaerobic or anoxic environment in the coking chamber, and preventing the burning of the coal as fired and the oxygen remained in the coking chamber during the coal charging process from generating SO 2 Avoiding SO from the source 2 The pollution to the environment caused by excessive discharge is avoided, and the environmental protection level in the coking production process is improved.)

1. A device for reducing sulfur dioxide emission in the coal charging process of a coke oven is characterized by comprising air curtain devices which are respectively arranged at a machine side oven door and a coke side oven door; at least one side of the oven door frame of the oven side door and the oven side door of the coke oven is provided with an air curtain air outlet along the height direction at one side facing the center of the carbonization chamber, and the air curtain is formed by blowing air from the air curtain air outlet to completely separate the inner space of the carbonization chamber from the external atmospheric environment.

2. The device for reducing the emission of sulfur dioxide in the coal charging process of the coke oven as claimed in claim 1, wherein the inner sides of the corresponding side oven door frames of the oven side oven door and the oven side oven door provided with the air curtain air outlets are embedded with air curtain air outlet boxes, and the outer edge lines of the air curtain air outlet boxes are flush with the edge lines of the corresponding parts of the oven door frames; one side of the air curtain air outlet box, which faces the center of the carbonization chamber, is provided with an air curtain air outlet along the height direction, the other side of the air curtain air outlet box is provided with an air box air inlet, and the air box air inlet is connected with a high-speed air generating device through an air inlet pipeline.

3. The device for reducing the emission of sulfur dioxide in the coal charging process of the coke oven as claimed in claim 1, wherein the opening shape of the air curtain air outlet is trapezoidal, i.e. the opening width of the air curtain air outlet continuously changes from small to large from top to bottom.

4. The device for reducing the emission of sulfur dioxide in the coal charging process of the coke oven as claimed in claim 2, wherein the high-speed air generating device is composed of a fan and an air inlet pipeline, the fan is connected with the air inlet of the air box of the air curtain air outlet box through the air inlet pipeline, and the fan is driven by a high-speed motor.

5. The apparatus of claim 1, wherein the side door frame of the coke oven side door without the air curtain outlet is provided with a deflector or an air curtain inlet.

6. The device for reducing the emission of sulfur dioxide during the coal charging process of the coke oven as claimed in claim 5, wherein the guide plate is arranged at the inner side of the door frame of the corresponding side oven and symmetrically arranged with the air curtain air outlet along the central line of the carbonization chamber; the guide plate is integrally arranged in an inclined manner, and one end of the guide plate facing the carbonization chamber inclines towards the direction of the central line of the carbonization chamber.

7. The device for reducing the emission of sulfur dioxide during the coal charging process of the coke oven as claimed in claim 5, wherein the air curtain air inlet is arranged on an air curtain air inlet box embedded on the inner side of the corresponding side oven door frame, the air curtain air inlet and the air curtain air outlet are symmetrically arranged along the center line of the carbonization chamber, the shape of the air curtain air inlet is consistent with that of the air curtain air outlet, and the width of the air curtain air inlet is greater than or equal to that of the air curtain outlet air with the corresponding height.

8. The apparatus of claim 7, wherein the outer edge line of the air curtain inlet box is flush with the edge line of the corresponding portion of the oven door frame; an air box air outlet is arranged on the air curtain air inlet box and is connected with an external gas collecting device or communicated with external atmosphere through an air outlet pipeline.

9. The method for reducing the sulfur dioxide emission in the coal charging process of the coke oven based on any one of the devices of claims 1 to 8 is characterized by comprising the following steps:

1) the machine side furnace door and the coke side furnace door of the coke oven carbonization chamber are taken off, the coke pusher and the coke guide are in place, and before the coke pusher is prepared, the air curtain device arranged at the machine side of the carbonization chamber is started;

2) in the process that the coke pusher pushes the coke in the carbonization chamber out of the carbonization chamber, high-speed airflow generated by the high-speed air generating device is distributed by the air curtain air outlet box and then blown out by the air curtain air outlet, the high-speed airflow flows to the furnace door frame at the other side through the furnace mouth at the machine side of the carbonization chamber along the direction vertical to the central line of the carbonization chamber, an air curtain is formed on the open surface of the whole furnace mouth at the machine side, and the inner space of the carbonization chamber is completely isolated from the outer part of the carbonization chamber; after reaching the furnace door frame at the other side, the high-speed airflow flows out of the carbonization chamber, namely in the direction away from the furnace mouth at the side under the action of the guide plate; or enters the air curtain outlet and inlet box through the air curtain inlet and is led out from the air box outlet;

3) when the coke guide finishes the coke guide operation, starting an air curtain device arranged at the coke side of the coking chamber, forming an air curtain on the whole open surface of a coke side furnace mouth, and completely isolating the inner space of the coking chamber from the outer part of the coking chamber; the process and the principle are the same as those of the step 2);

4) when the coke discharging operation is completed, the oven door at the oven side and the oven door at the coke side are re-installed in place to seal the oven ports at the oven side and the oven side of the carbonization chamber, and then the air curtain devices at the oven side and the coke side of the carbonization chamber are closed.

Technical Field

The invention relates to the technical field of coke oven smoke dust control, in particular to a device and a method for reducing sulfur dioxide emission in a coal charging process of a coke oven.

Background

During the process of charging coal into the coke oven, a great deal of smoke and dust can be generated instantly in the coking chamber. As the coke pushing operation of the carbonization chamber before coal charging, the carbonization chamber of the coke oven goes through the processes of door picking, coke pushing and oven door closing, during the period of door picking and oven door closing, the carbonization chamber is communicated with the atmosphere, and the air outside the carbonization chamber can enter into the carbonization chamber. When coal is charged into the carbonization chamber, the coal enters the air in the carbonization chamber during the period of opening the carbonization chamber under the high-temperature environmentThe oxygen in the coal material is subjected to combustion reaction, and a certain amount of SO is generated during combustion due to sulfur content in the coal material₂SO formed₂When coal is charged, part of the coal enters the coal charging and dust removing system along with coal charging smoke dust, SO that the SO at the discharge port of the coal charging and dust removing system₂Exceeding the relevant environmental standard limits.

SO discharged by a coke oven coal charging dust removal system in the coal charging process₂Because of the instantaneous intermittence of the coal-charging smoke dust, the inevitable difficulty is caused to the stable and efficient desulfurization of the smoke dust, and the construction and the operation of the desulfurization facility need enterprises to invest certain capital for guarantee. Therefore, the best solution is to control the SO from the source₂Is generated.

Disclosure of Invention

The invention provides a device and a method for reducing sulfur dioxide emission in the coal charging process of a coke oven, wherein the gas curtain devices are arranged at a machine side oven door and a coke side oven door, SO that the phenomenon that external air enters a carbonization chamber in the coke discharging process of the coke oven can be avoided or reduced, the carbonization chamber is kept in an oxygen-free or oxygen-deficient environment, and SO generated by combustion of coal as fired and oxygen remained in the carbonization chamber during coal charging is avoided₂Avoiding SO from the source₂The pollution to the environment caused by excessive discharge is avoided, and the environmental protection level in the coking production process is improved.

In order to achieve the purpose, the invention adopts the following technical scheme:

a device for reducing sulfur dioxide emission in the coal charging process of a coke oven comprises gas curtain devices respectively arranged at a side oven door and a coke side oven door; at least one side of the oven door frame of the oven side door and the oven side door of the coke oven is provided with an air curtain air outlet along the height direction at one side facing the center of the carbonization chamber, and the air curtain is formed by blowing air from the air curtain air outlet to completely separate the inner space of the carbonization chamber from the external atmospheric environment.

The inner sides of the furnace door frames of the corresponding sides, which are provided with air curtain air outlets, of the machine side furnace door and the coke side furnace door are embedded with air curtain air outlet boxes, and the outer edge lines of the air curtain air outlet boxes are flush with the edge lines of the corresponding parts of the furnace door frames; one side of the air curtain air outlet box, which faces the center of the carbonization chamber, is provided with an air curtain air outlet along the height direction, the other side of the air curtain air outlet box is provided with an air box air inlet, and the air box air inlet is connected with a high-speed air generating device through an air inlet pipeline.

The shape of the opening of the air curtain air outlet is trapezoidal, namely, the width of the air curtain air outlet continuously changes from small to large from top to bottom.

The high-speed wind generating device is composed of a fan and an air inlet pipeline, the fan is connected with an air box air inlet of the air curtain air outlet box through the air inlet pipeline, and the fan is driven by a high-speed motor.

And a guide plate or an air curtain air inlet is arranged on the furnace door frame at one side of the machine side furnace door and the coke side furnace door, which is not provided with the air curtain air outlet.

The guide plates are arranged on the inner sides of the corresponding side furnace door frames and are symmetrically arranged with the air curtain air outlet along the central line of the carbonization chamber; the guide plate is integrally arranged in an inclined manner, and one end of the guide plate facing the carbonization chamber inclines towards the direction of the central line of the carbonization chamber.

The air curtain air inlet is arranged on an air curtain air inlet box embedded on the inner side of the corresponding side furnace door frame, the air curtain air inlet is symmetrically arranged with the air curtain air outlet along the central line of the carbonization chamber, the shape of the air curtain air inlet is consistent with that of the air curtain air outlet, and the width of the air curtain air inlet is more than or equal to that of the air curtain outlet air with the corresponding height.

The outer edge line of the air curtain air inlet box is flush with the edge line of the corresponding part of the furnace door frame; an air box air outlet is arranged on the air curtain air inlet box and is connected with an external gas collecting device or communicated with external atmosphere through an air outlet pipeline.

A method for reducing sulfur dioxide emission in the coal charging process of a coke oven comprises the following steps:

1) the machine side furnace door and the coke side furnace door of the coke oven carbonization chamber are taken off, the coke pusher and the coke guide are in place, and before the coke pusher is prepared, the air curtain device arranged at the machine side of the carbonization chamber is started;

2) in the process that the coke pusher pushes the coke in the carbonization chamber out of the carbonization chamber, high-speed airflow generated by the high-speed air generating device is distributed by the air curtain air outlet box and then blown out by the air curtain air outlet, the high-speed airflow flows to the furnace door frame at the other side through the furnace mouth at the machine side of the carbonization chamber along the direction vertical to the central line of the carbonization chamber, an air curtain is formed on the open surface of the whole furnace mouth at the machine side, and the inner space of the carbonization chamber is completely isolated from the outer part of the carbonization chamber; after reaching the furnace door frame at the other side, the high-speed airflow flows out of the carbonization chamber, namely in the direction away from the furnace mouth at the side under the action of the guide plate; or enters the air curtain outlet and inlet box through the air curtain inlet and is led out from the air box outlet;

3) when the coke guide finishes the coke guide operation, starting an air curtain device arranged at the coke side of the coking chamber, forming an air curtain on the whole open surface of a coke side furnace mouth, and completely isolating the inner space of the coking chamber from the outer part of the coking chamber; the process and the principle are the same as those of the step 2);

4) when the coke discharging operation is completed, the oven door at the oven side and the oven door at the coke side are re-installed in place to seal the oven ports at the oven side and the oven side of the carbonization chamber, and then the air curtain devices at the oven side and the coke side of the carbonization chamber are closed.

Compared with the prior art, the invention has the beneficial effects that:

1) because of the temperature difference between the inside and the outside of the carbonization chamber, a certain pressure difference gradient can be formed on the plane of the furnace mouth along the height direction of the carbonization chamber, the invention adopts the air curtain air outlet with the width gradually increasing from top to bottom along the height direction of the carbonization chamber, and the air curtain with the strength gradually increasing from top to bottom is formed on the plane of the furnace mouth along the height direction of the carbonization chamber, thereby effectively balancing the pressure difference change formed by the temperature difference between the inside and the outside, preventing the outside air from entering the carbonization chamber, and forming an oxygen-free or oxygen-deficient environment in the carbonization chamber, thereby avoiding the burning of the coal as fired and the oxygen remained in the carbonization chamber during the coal charging₂Solving the SO in the coal-charging smoke dust from the source₂The problem of environmental pollution caused by excessive emission is solved, and the environmental protection level in the coking production process is improved;

2) the gas curtain is adopted to effectively isolate the carbonization chamber from the outside, so that the phenomenon that the temperature in the carbonization chamber is reduced because furnace mouths on two sides of the carbonization chamber are open and outside cold air enters the carbonization chamber in the coke discharging operation process can be avoided or reduced, the loss of effective heat of the coke oven is reduced, the production efficiency of the coke oven is improved, the brickwork in the carbonization chamber can be effectively protected, the service life of the brickwork is prolonged, and the leakage rate of the oven wall of the carbonization chamber is reduced.

Drawings

FIG. 1 is a schematic structural diagram I of a device for reducing sulfur dioxide emission in a coal charging process of a coke oven.

FIG. 2 is a schematic structural diagram I of a device for reducing sulfur dioxide emission in the coal charging process of a coke oven.

Fig. 3 is a view a-a in fig. 1.

In the figure: 1. charring chamber 2, furnace column 3, furnace door frame 4, protective plate 5, air curtain air outlet box 6, guide plate 7, air curtain air inlet box 8, air curtain air outlet

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in figures 1 and 2, the device for reducing the sulfur dioxide emission in the coal charging process of the coke oven comprises gas curtain devices which are respectively arranged at a machine side oven door and a coke side oven door; at least one side of the oven door frame 3 of the oven side door and the oven side door of the coke oven is provided with an air curtain air outlet 8 along the height direction at one side facing the center of the carbonization chamber 1, and the air curtain is formed by blowing air from the air curtain air outlet 8 to completely separate the inner space of the carbonization chamber 1 from the external atmospheric environment.

The inner sides of the furnace door frames 3 corresponding to the side furnace doors and the coke side furnace doors, which are provided with air curtain air outlets 8, are embedded with air curtain air outlet boxes 5, and the outer edge lines of the air curtain air outlet boxes 5 are flush with the edge lines of the corresponding parts of the furnace door frames 3; an air curtain air outlet 8 is arranged on one side of the air curtain air outlet box 5 facing the center of the carbonization chamber 1 along the height direction, an air box air inlet is arranged on the other side of the air curtain air outlet box 5, and the air box air inlet is connected with a high-speed air generating device through an air inlet pipeline.

As shown in fig. 3, the opening of the air curtain outlet 8 is trapezoidal, that is, the opening width changes continuously from small to large from top to bottom.

The high-speed wind generating device consists of a fan and an air inlet pipeline, the fan is connected with an air box air inlet 8 of the air curtain air outlet box 5 through the air inlet pipeline, and the fan is driven by a high-speed motor.

And a guide plate 6 or an air curtain air inlet is arranged on one side furnace door frame 3 of the machine side furnace door and the coke side furnace door, which is not provided with an air curtain air outlet 8.

The guide plate 6 is arranged at the inner side of the corresponding side furnace door frame 3 and is symmetrically arranged with the air curtain air outlet 8 along the central line of the carbonization chamber 1; the guide plate 6 is integrally arranged in an inclined way, and one end facing the interior of the carbonization chamber 1 inclines towards the direction of the central line of the carbonization chamber 1.

The air curtain air inlet is arranged on an air curtain air inlet box 7 embedded on the inner side of the corresponding side furnace door frame 3, the air curtain air inlet is symmetrically arranged with an air curtain air outlet 8 along the central line of the carbonization chamber 1, the shape of the air curtain air inlet is consistent with that of the air curtain air outlet 8, and the width of the air curtain air inlet is more than or equal to that of the air curtain outlet 8 with the corresponding height.

The outer edge line of the air curtain air inlet box 7 is flush with the edge line of the corresponding part of the furnace door frame 3; an air box air outlet is arranged on the air curtain air inlet box 7 and is connected with an external gas collecting device or communicated with external atmosphere through an air outlet pipeline.

A method for reducing sulfur dioxide emission in the coal charging process of a coke oven comprises the following steps:

1) the machine side furnace door and the coke side furnace door of the coke oven carbonization chamber 1 are taken off, the coke pusher and the coke guide are in place, and before the coke pusher is prepared, the air curtain device arranged at the machine side of the carbonization chamber 1 is started;

2) in the process that the coke pusher pushes the coke in the coking chamber 1 out of the coking chamber 1, high-speed airflow generated by a high-speed air generating device is distributed by an air curtain air outlet box 5 and then blown out by an air curtain air outlet 8, the high-speed airflow flows to the furnace door frame 3 at the other side through the furnace mouth at the machine side of the coking chamber 1 along the direction vertical to the central line of the coking chamber 1, an air curtain is formed on the open surface of the whole furnace mouth at the machine side, and the internal space of the coking chamber 1 is completely isolated from the outside of the coking chamber 1; after reaching the furnace door frame 3 at the other side, the high-speed airflow flows out of the carbonization chamber 1, namely in the direction away from the furnace mouth at the side under the action of the guide plate 6; or enters the air curtain air outlet and inlet box 7 through the air curtain air inlet and is led out from the air box air outlet;

3) when the coke guide finishes the coke guide operation, starting an air curtain device arranged at the coke side of the coking chamber 1, forming an air curtain on the whole open surface of a coke side furnace mouth, and completely isolating the inner space of the coking chamber 1 from the outer part of the coking chamber 1; the process and the principle are the same as those of the step 2);

4) when the coke discharging operation is completed, the oven door at the oven side and the oven door at the coke side are re-installed in place to seal the oven ports at the oven side and the oven side of the carbonization chamber 1, and then the air curtain devices at the oven side and the coke side of the carbonization chamber 1 are closed.

A machine side furnace door and a coke side furnace door are respectively arranged on two sides of a coke oven carbonization chamber, the machine side furnace door or the coke side furnace door is respectively arranged on a furnace door frame on the corresponding side, the inner side of the furnace door frame is fixedly connected with a furnace column, and a protection plate is arranged on the outer side. In the invention, an air curtain air outlet box 5, an air curtain air inlet box 7 and a guide plate 6 are all embedded on corresponding furnace door frames 3, the guide plate 6 is used for guiding the gas sprayed out of an air curtain air outlet 8 out of a carbonization chamber 1 to prevent the gas from entering the carbonization chamber 1, and the air curtain air inlet box 7 is used for collecting the gas sprayed out of the air curtain air outlet 8 through an air curtain air inlet and then guiding the gas to an external gas collecting device for recycling after treatment or directly discharging the gas into the atmosphere.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.