CN211420053U - Tamping coke oven coal-charging smoke dust treatment system - Google Patents

Abstract

The utility model relates to a coal-charging smoke dust treatment system of a tamping coke oven, which comprises a gas cut-off valve, a smoke guide tee joint A, a smoke cut-off valve, a smoke guide tee joint B, a dry dust removal device, a fan and a gas mixing device; the middle part of the ascending pipe is connected with the gas collecting pipe through a bridge pipe, and a gas cut-off valve is arranged on the bridge pipe; the top of the ascending pipe is connected with one interface of the main pipe of the smoke guide tee joint A, and the other interface of the main pipe is provided with a water seal valve; the branch pipe of the smoke guide tee joint A is connected with the branch pipe of the smoke guide tee joint B through a first connecting pipeline, and a smoke stop valve is arranged on the first connecting pipeline; the main pipes of the smoke guide tee joints B corresponding to the carbonization chambers are sequentially connected in series through a second connecting pipeline to form a furnace top coal charging smoke dust pipeline, and the furnace top coal charging smoke dust pipeline is sequentially connected with a dry type dust removal device, a fan and a coal gas mixing device. The utility model discloses can effectively avoid the direct leading-in coal gas system of smoke and dust that produces among the tamping coke oven coal charging process and the coal gas clean system and the equipment that appear unfavorable, tar product quality reduction scheduling problem of going forward.

Description

A tamping coke oven charging soot treatment system

technical field

The utility model relates to the technical field of coal coking, in particular to a tamping coke oven charging soot treatment system.

Background technique

In coking production, the most widely used regenerative coke oven is usually divided into two types: top-loading coke oven and tamping coke oven. Whether it is a top-loading coke oven or a tamping coke oven, the coking coal is basically charged by hot charging, that is, when the coking chamber is at a high temperature, the coking coal is charged into the coking chamber. During the coal charging process, the coal loaded into the carbonization chamber contacts the hot inner wall of the carbonization chamber or in the high temperature environment of the carbonization chamber, a large amount of flue gas will be generated instantaneously, and a certain amount of coal particles will be carried in the generated large amount of flue gas. In order to prevent or reduce the pollution to the surrounding environment caused by the escape of a large amount of smoke and dust from the carbonization chamber during the coal charging process, an anthracite coal charging process such as Proven and OPR is usually used for the coal charging process, or high-pressure ammonia injection is used to The smoke and dust generated during coal charging are led to the adjacent carbonization chamber and then enter the gas purification system. Combined with the process of collecting the smoke and dust from the top of the furnace and the smoke and dust from the furnace door on the side of the machine, they are purified by the coal-charging dust removal system.

Proven, OPR and other anthracite coal charging processes are to increase the suction force of the coke oven gas gas collecting pipe, form a slight negative pressure in the carbonization chamber, and pass a large amount of smoke and dust generated during coal charging through the rising pipe, which is connected to the coke oven gas gas collecting pipe. The bridge pipe is introduced into the gas collecting pipe, so as to realize the anthracite coal charging operation. In this process, although the flue gas generated during coal charging is introduced into the gas system, the coal dust carried by it is also brought into the gas system. When passing through the bridge pipe, most of the coal dust is washed down by ammonia water used for gas cooling. As the tar ammonia water enters the tar, tar residue is formed in the subsequent separation process of the tar ammonia water, and a part of the coal dust enters the subsequent primary cooler and electric tar catcher, resulting in an increase in the operating resistance of the primary cooler, and the The cooling efficiency of the cooler is reduced, and at the same time, coal dust enters the tar, which will reduce the quality of the tar and generate a certain amount of tar residue that needs special treatment.

High-pressure ammonia water jet is used to guide the smoke and dust generated during coal charging to the adjacent carbonization chamber and then enter the gas purification system. Combined with the process of collecting the smoke and dust from the top of the furnace and the smoke and dust from the furnace door on the side of the machine, the coal-charging dust removal system is used for purification. On the one hand, it is necessary to connect the smoke guide hole at the top of the carbonization chamber with the smoke guide hole at the top of the adjacent carbonization chamber by using a U-shaped pipe smoke guide vehicle during coal charging, so as to introduce the smoke and dust generated during coal charging into the adjacent carbonization chamber. The coal charging smoke and dust collection facility installed on the coal charging truck or above the furnace door on the side of the machine is used to capture the escaping coal charging smoke and dust, and then the captured smoke and dust are sent to the coal charging dust removal system through the dust removal pipeline for purification. To this end, it is necessary to build a corresponding coal-loading smoke guide vehicle, coal-loading and dust-removing ground station system or vehicle-mounted coal-loading and dust-removing system, and a certain amount of power media such as water, compressed air, steam, and electric energy are also consumed during operation. The efficiency of soot capture is not satisfactory. On the other hand, at the bridge pipe corresponding to the coal-loading chamber or the bridge pipe adjacent to the carbonization chamber, a high-pressure ammonia water injection facility needs to be set up to use the suction formed by the high-pressure ammonia water injection to pass most of the smoke and dust generated during the coal charging process through the The riser pipe and bridge pipe are introduced into the gas collecting pipe. For this purpose, a high-pressure ammonia water system needs to be set up. While the high-pressure ammonia water system consumes a certain amount of electric energy during operation, the coal dust brought into the gas system will still bring the aforementioned effects to the subsequent gas purification system. adverse effects and related problems such as reducing the quality of tar.

From the perspective of the entire coking process, if all the flue gas generated during coal charging is recovered, about 2 to 4% of the gas can be recovered. The existing coal charging smoke and dust treatment process, although part or all of the flue gas generated during coal charging is introduced into the gas system to achieve effective recovery of gas resources, but it also brings the above problems, and the temperature of the flue gas is relatively low at this time. , the moisture content in the flue gas is high, and the effective gas composition is not high. At the same time, due to the suction generated by the flue gas introduction system, the oxygen content in the flue gas will be increased, which also poses a certain threat to the safe operation of the subsequent gas purification system.

To sum up, in order to effectively avoid the above-mentioned problems caused by the control of coal charging smoke and dust during the coal charging process, improve the gas purification system's antegrade performance and tar quality, and promote the promotion and implementation of energy-saving technologies such as coal humidity control, it is necessary to focus on coal charging. The soot produced in the process adopts a new technical route and technical means to develop a new coal-loading soot treatment process.

SUMMARY OF THE INVENTION

The utility model provides a fume and dust processing system for charging coal in a tamping coke oven, which can effectively prevent the gas purification system and equipment from being unfavorable in the running and the quality of tar products caused by the smoke and dust generated in the process of charging coal in a tamping coke oven being directly introduced into a gas system. reduction, etc.

In order to achieve the above object, the utility model adopts the following technical solutions to realize:

A tamping coke oven charging soot treatment system, comprising a gas cut-off valve, a flue gas guide three-way A, a flue gas cut-off valve, a smoke guide three-way B, a dry dust removal device, a fan and a gas mixing device; a tamping coke oven The top of the carbonization chamber is provided with a riser pipe, the middle part of the riser pipe is connected to the gas collecting pipe through a bridge pipe, and a gas cut-off valve is set on the bridge pipe; The main pipe and the riser pipe are coaxially arranged, and a water seal valve is arranged at the other interface of the main pipe; the branch pipe of the smoke guide tee A is connected to the branch pipe of the smoke guide tee B through the connecting pipe 1, and a flue gas cut-off valve is installed on the connecting pipe 1; The main pipes of the multiple flue-conducting tees B corresponding to each carbonization chamber are connected in series to form a furnace top coal-loading soot pipeline, and the furnace-top coal-loading soot pipeline is sequentially connected to the dry dust removal device, the fan and the gas blending through the soot conveying pipeline. device.

A tamping coke oven charging soot treatment system, further comprising a machine-side furnace door sealing device; the machine-side furnace door sealing device is arranged on a coal charging truck, and briquettes are fed into a carbonization chamber through the coal charging truck through a driving device The time cover is arranged on the furnace door frame on the side of the machine; the sealing device for the furnace door on the side of the machine is a closed cover body surrounded by an upper sealing plate, a lower sealing plate, a side sealing plate, a front sealing plate and a rear support plate. The plate is provided with an opening for the briquettes to pass through, the back support plates are two pieces, and the distance between the edges of the two back support plates toward the center side is greater than the width of the carbonization chamber.

The smoke guide tee A and the smoke guide tee B are arranged obliquely through the smoke and dust passage formed by the connecting pipe 1 and the smoke and dust conveying pipe.

Along the flow direction of soot, the initial end of the coal-loading soot pipe on the furnace top is communicated with the gas collecting pipe through a communication pipe, and a balance valve is arranged on the communication pipe.

The dry dust removal device is a bag type dust collector, and a coke powder inlet is set on the dust conveying pipeline upstream of the bag type dust collector, which is connected to the conveying pipeline of the pre-spraying powder; the source of the pre-spraying powder is the coke oven dust removal or The coke powder collected by CDQ dust removal; the bag filter dust removal and the conveying of pre-spray powder are all using compressed nitrogen.

Compared with the prior art, the beneficial effects of the present utility model are:

1) Improve the antegrade ability of the gas purification system and improve the quality of gas and tar;

By collecting and processing the flue gas with a large amount of coal dust generated when the coke oven is charged with coal, the flue gas carrying a large amount of coal dust is prevented from entering the gas purification system, and the resistance of the gas primary cooling device caused by the coal dust in the flue gas is eliminated. Increase the cooling capacity and reduce the factors, improve the forward capacity of the gas purification system, improve the quality of the gas and the quality of the collected tar, and reduce the production of tar residue.

2) Reduce the investment and operation cost of coal-loading soot control;

By separately collecting and processing the flue gas with a large amount of coal dust generated during the charging of coke ovens, high-pressure ammonia water, Proven, OPR and other anthracite coal charging systems, coal charging smoke guide trucks, furnace top smoke guide holes and other facilities are omitted. The dry dust removal device, combined with the application of the pre-spraying process, can effectively purify the smoke and dust, avoid the secondary pollution of water caused by wet dust removal, and significantly reduce the investment in project construction and the energy consumption of long-term operation of the system.

3) Make full use of gas resources and reduce the consumption of high-quality gas;

By collecting and treating the flue gas with a large amount of coal dust generated when the coke oven is charged with coal separately, it is supplied to the coke oven heating system, which realizes the effective utilization of low-quality gas resources, reduces the consumption of high-quality coke oven gas, and has certain advantages. economic benefits.

4) Improve the safety of gas purification system operation;

Compared with the prior art process of introducing the flue gas generated during coal charging into the gas purification system by utilizing the suction generated by high-pressure ammonia water injection or increasing the suction in the gas collecting pipe, the utility model utilizes the fan to charge the coke oven with the gas generated during coal charging. The flue gas with a large amount of coal dust is collected and processed separately, and it is not necessary to consider the problem that the oxygen content entering the gas purification system exceeds the standard due to the excessive suction of the flue gas collection system, which poses a serious threat to the safety of the gas purification system. While effectively capturing the generated smoke and dust, the operation safety of the gas purification system is improved.

Description of drawings

FIG. 1 is a schematic structural diagram of a tamping coke oven charging soot treatment system according to the present invention.

Fig. 2 is a schematic diagram of the connection relationship between the riser pipe, the gas collecting pipe and the furnace top coal smoke dust pipe according to the present invention.

Figure 3 is a schematic diagram of the working state of the machine-side furnace door sealing device according to the present invention.

4 is a schematic structural diagram of the machine-side furnace door sealing device according to the present invention.

In the picture: 1. Tamping coke oven 2. Machine side furnace door sealing device 21. Upper sealing plate 22. Lower sealing plate 23. Side sealing plate 24. Front sealing plate 25. Rear support plate 3. Rising pipe 4. Gas cut off Valve 5. Smoke guide three-way A 6. Flue gas cut-off valve 7. Smoke guide three-way B 8. Dry dust removal device 9. Fan 10. Gas mixing device 11. Balance valve 12. Smoke and dust conveying pipe 13. Gas collecting pipe 14 . Water seal valve 15. Machine side furnace door frame 16. Furnace column 17. Coal cake

Detailed ways

The specific embodiments of the present utility model will be further described below in conjunction with the accompanying drawings:

As shown in Figure 1, a tamping coke oven charging soot treatment system according to the present utility model includes a gas cut-off valve 4, a flue gas guide three-way A5, a flue gas cut-off valve 6, a smoke guide three-way B7, a dry Type dust removal device 8, fan 9 and gas mixing device 10; the top of the carbonization chamber of the tamping coke oven 1 is provided with a rising pipe 3, as shown in Figures 1 and 2, the middle of the rising pipe 3 is connected to the gas collecting pipe 13 through a bridge pipe , a gas cut-off valve 4 is set on the bridge pipe; the top of the riser pipe 3 is connected to an interface of the main pipe of the flue-conducting tee A5, the main pipe of the flue-conducting tee A5 is coaxially arranged with the riser pipe 3, and the other interface of the main pipe is located at the A water seal valve 14 is provided; the branch pipe of the flue-guiding tee A5 is connected to the branch pipe of the flue-guiding tee B7 through a connecting pipe 1, and a flue gas shut-off valve 6 is set on the connecting pipe 1; The main pipes leading through B7 are connected in series to form a coal-loading soot pipeline on the top of the furnace through connecting pipelines 2 in sequence.

A tamping coke oven charging soot treatment system, further comprising a machine-side furnace door sealing device 2; the machine-side furnace door sealing device 2 is arranged on a coal charging vehicle, and is fed into a carbonization chamber through a driving device in the coal charging vehicle The briquettes 17 are covered on the machine side furnace door frame 15 (as shown in Figure 3); as shown in Figure 4, the machine side furnace door sealing device 2 is composed of an upper sealing plate 21, a lower sealing plate 22, and a side sealing plate 21. The closed cover enclosed by the plate 23, the front sealing plate 24 and the rear support plate 25, the front sealing plate 24 is provided with an opening for the briquettes 17 to pass through, the rear support plate 25 is two pieces, and the two rear support plates The spacing of the edge of the plate 25 toward the center is larger than the width of the carbonization chamber.

When the machine-side furnace door sealing device 2 is covered on the machine-side furnace door frame 15 under the action of the driving device on the coal charging truck, a closed space is formed outside the machine-side furnace mouth of the carbonization chamber, and this space only allows the coal cake 17 to pass through. , which can effectively prevent the coal dust from escaping from the furnace mouth of the machine side when charging coal.

Different from the existing machine-side furnace door sealing device, the machine-side furnace door sealing device 2 of the present invention is directly covered on the machine-side furnace door frame 15, while the existing machine-side furnace door sealing device is set on the On the furnace column 16, this arrangement forms an upper and lower open space between the furnace mouth of the machine side and the sealing cover of the furnace door on the machine side, and the upper open space and the furnace door above the furnace door are installed between the furnace column 16 to trap the smoke and dust on the machine side. The collecting hood is connected, and under the action of the dust removal ground station fan, a large amount of ambient air will be inhaled from the open space below. These ambient air will merge with the smoke and dust escaping from the furnace mouth on the machine side during the rising process, and then pass through the smoke and dust collecting hood of the furnace door on the machine side. Enter the dust removal ground station. On the other hand, the utility model adopts the machine-side furnace door sealing device 2 which is directly covered on the machine-side furnace door frame 15. The upper, lower, left, and right sides are all closed structures, and only an opening for the briquettes to pass through is provided in the middle, which can effectively reduce the carbonization rate. The smoke and dust generated indoors are enclosed in the carbonization chamber, and under the action of the fan 9, sufficient negative pressure is generated at the gap between the furnace door sealing device 2 and the coal cake on the side of the machine, which can effectively prevent the escape of smoke and dust and reduce the mixing of ambient air. to improve the safety of the coal-loading soot collection system.

The smoke guide tee A 5 and the smoke guide tee B 7 are arranged obliquely through the smoke and dust passage formed by the connecting pipe 1 and the smoke and dust conveying pipe 12, which can prevent the coal dust in the coal-loading dust from depositing in the smoke and dust passage and causing the smoke and dust to be deposited. Channel blocked.

Along the flow direction of the soot, the initial end of the coal-loading soot pipe on the top of the furnace is communicated with the gas collecting pipe 13 through a communication pipe, and a balance valve 11 is arranged on the communication pipe. By setting the balance valve 11, the possible surge problem of the fan 9 during operation is eliminated, and the safe and stable operation of the fan 9 is ensured.

The dry dust removal device 8 is a bag filter, and a coke powder inlet is set on the dust conveying pipeline 12 upstream of the bag filter, which is connected to the conveying pipeline of the pre-spraying powder; the source of the pre-spraying powder is the coke out of the coke oven. The coke powder collected by dust removal or dry quenching dust removal; bag filter dust removal and pre-spray powder transportation are all using compressed nitrogen, which can avoid the explosion of the system due to the use of compressed air to increase the oxygen content in the dust.

The technological process of a tamping coke oven charging soot treatment system according to the present invention is as follows:

1) Before starting the operation of charging coal into the carbonization chamber, cut off the riser pipe 3 corresponding to the carbonization chamber from the gas collecting pipe 13 by closing the gas cut-off valve 4 on the bridge pipe, and at the same time close the water seal valve 14 to isolate the riser pipe 3 from the atmosphere ;Avoid coal loading smoke and dust generated during coal loading from entering the gas purification system by mistake;

2) The machine-side furnace door sealing device 2 is tightly attached to the outside of the machine-side furnace door frame 15 by the driving device on the coal-charging truck; it is ensured that the coal-loading smoke and dust generated in the carbonization chamber during coal charging escape to the machine-side furnace mouth of the carbonization chamber. Environmental pollution caused by tamping around the coke oven 1;

3) Open the flue gas cut-off valve 6 between the flue gas guide tee A 5 and the flue gas guide tee B 7 corresponding to the coalification chamber to be loaded, so that the corresponding riser 3 is communicated with the furnace top coal-loading soot pipe; at this time Under the action of the fan 9, a certain negative pressure is formed in the carbonization chamber, which is conducive to the effective capture of the coal charging smoke and dust generated during coal charging;

4) Under the action of the fan 9, a large amount of smoke and dust generated during coal loading enters the dry pipe through the riser pipe 3, the smoke guide tee A 5, the flue gas cut-off valve 6, the smoke guide tee B 7, and the coal-loading smoke and dust pipe on the top of the furnace. type dust removal device 8; the coke powder for pre-spraying is sent into the flue dust conveying pipeline 12 by means of compressed nitrogen; in the dry dust removal device 8, the filter bag removes the coal dust in the flue gas, the coke powder adsorbed with tar and other viscous components After removing, the purified flue gas enters the gas mixing device 10 under the action of the fan 9, and is sent into the gas pipeline for heating the tamping coke oven for heating of the tamping coke oven 1 itself;

The coke powder is sent into the flue dust conveying pipe 12 by means of compressed nitrogen. In the flue dust conveying pipe 12, the coke powder is fully contacted with tar and other viscous components carried in the flue dust, and the tar and other viscous components are adsorbed on the coke powder particles and enter with the airflow. In the dry dust removal device 8, in the dry dust removal device 8, the coal dust in the flue gas and the coke powder adsorbed with viscous components such as tar are blocked on the surface of the filter bag and removed, and the flue gas of coal dust is removed. Under the action of the fan 9, it enters the gas blending device 10, and through the gas blending device 10, the flue gas is sent into the gas pipeline for heating the tamping coke oven 1 itself. The gas blending device 10 can fully mix the coal-loading flue gas from which coal dust has been removed and the gas used for heating the tamping coke oven 1 to be used for the combustion and heating of the coke oven, and can replace a part of the purified coke oven gas to realize the Full and efficient use of resources.

5) After the coal loading is completed, the machine-side furnace door sealing device 2 is separated from the machine-side furnace door frame 15 under the drive of the driving device, close the machine-side furnace door, and open the gas cut-off valve 4 on the bridge pipe to make the rising pipe of the corresponding carbonization chamber. 3 is connected to the gas collecting pipe 13; at this time, the coal material in the carbonization chamber enters the dry distillation process in an oxygen-free environment. When the coal material is stable, the gas produced by dry distillation only carries very little dust. The adverse effects of the system gas on the subsequent purification and treatment facilities caused by dust will be basically eliminated, and the quality of tar will also be greatly improved;

6) Close the previously opened flue gas cut-off valve 6 to cut off the passage between the corresponding riser 3 and the furnace top coal-loading soot pipe.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Equivalent replacement or modification of the new technical solution and its utility model concept shall be included within the protection scope of the present utility model.

Claims (5)

1. a tamping coke oven loading coal smoke and dust processing system, is characterized in that, comprises gas shut-off valve, smoke guide three-way A, flue gas cut-off valve, smoke guide three-way B, dry dust removal device, fan and gas blending device; the top of the carbonization chamber of the tamping coke oven is provided with a riser pipe, the middle part of the riser pipe is connected to the gas collecting pipe through a bridge pipe, and a gas cut-off valve is installed on the bridge pipe; The main pipe of the smoke guide tee A is coaxially arranged with the rising pipe, and the other interface of the main pipe is provided with a water seal valve; Set up flue gas cut-off valve; the main pipes of multiple flue-conducting tee B corresponding to each carbonization chamber are connected in series to form a furnace top coal-loading soot pipeline, and the furnace top coal-loading soot pipeline is sequentially connected to the dry dust removal device through the soot conveying pipeline. , fan and gas mixing device. 2. A tamping coke oven charging soot treatment system according to claim 1, characterized in that it further comprises a machine-side furnace door sealing device; the machine-side furnace door sealing device is arranged on the coal-charging vehicle, and is passed through the machine-side furnace door sealing device. The driving device is covered on the furnace door frame on the side of the machine when the coal charging truck feeds the coal briquettes into the carbonization chamber; A closed cover enclosed by a support plate, the front cover is provided with an opening for the briquettes to pass through, the rear support plate is two, and the distance between the two rear support plates toward the center side edge is greater than the width of the carbonization chamber . 3. A tamping coke oven charging soot treatment system according to claim 1, characterized in that, the smoke guide tee A and the smoke guide tee B pass through the smoke and dust passage and the smoke and dust conveying pipe formed by the connecting pipe 1. Both tilt settings. 4. A tamping coke oven charging soot treatment system according to claim 1, characterized in that, along the flow direction of soot, the initial end of the coal-loading soot pipe on the furnace top is communicated with the gas collecting pipe through a communication pipe, and the upper Set balance valve. 5 . A tamping coke oven charging soot treatment system according to claim 1 , wherein the dry dust removal device is a bag filter, and coke powder is arranged on the dust conveying pipe upstream of the bag filter. 6 . The inlet is connected to the conveying pipeline of the pre-spraying powder; the source of the pre-spraying powder is the coke powder collected by the coke oven dust removal or CDQ dust removal; the dust removal of the bag filter and the transportation of the pre-spray powder are all compressed Nitrogen.

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