CN211035805U - Top-mounted coke oven coal-charging smoke treatment system - Google Patents

Abstract

The utility model relates to a coal-charging smoke dust treatment system of a top-loading coke oven, wherein a bridge pipe is provided with a gas cut-off valve; the top of the ascending pipe is connected with a first connector of a smoke guide tee joint A, a second connector of the smoke guide tee joint A is provided with a water seal valve, a third connector is connected with a first connector of a smoke guide tee joint B through a first connecting pipeline, and the first connecting pipeline is provided with a smoke stop valve; the second and third interfaces of the smoke guide tee joint B are respectively connected with the corresponding interfaces of the smoke guide tee joint B of the carbonization chamber at the corresponding side through second connecting pipelines, and a plurality of second connecting pipelines are sequentially connected in series to form a coal charging smoke dust pipeline at the top of the furnace; the furnace top coal charging smoke pipeline is sequentially connected with the dry type dust removal device, the fan and the coal gas mixing device through a smoke conveying pipeline; the furnace top coal charging sealing device is a sleeve type furnace top coal charging sealing device. The problems of unfavorable smooth operation of a gas purification system and equipment, reduced quality of tar products and the like caused by the fact that smoke dust generated in the coal charging process of the top-loading coke oven is introduced into a gas system can be effectively avoided, and the application of a coal moisture control process is promoted.

Description

A top-loading coke oven loading coal soot treatment system

technical field

The utility model relates to the technical field of coal coking, in particular to a top-loading coke oven-loaded coal-loading smoke and dust processing 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, for the coal charging process, an anthracite coal charging process such as Proven and OPR is usually used, or high-pressure ammonia injection is used. Combined with the process of collecting the escaping smoke from the top of the furnace and the escaping smoke from the furnace door on the side of the machine, it is purified by the coal charging and dust removal system.

For anthracite coal charging processes such as Proven and OPR, the coal charging hole at the top of the carbonization chamber is effectively sealed by a coal charging machine. A large amount of smoke and dust generated during coal is introduced into the gas collecting pipe through the rising pipe and bridge pipe connected with the coke oven gas gas collecting pipe, so as to realize the smokeless 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, which will increase the operating resistance of the primary cooler and reduce the The cooling efficiency of the primary cooler, at the same time, because the coal dust enters the tar, the quality of the tar will be reduced, and a certain amount of tar residue that needs special treatment will be generated.

For the process of using high-pressure ammonia injection combined with the collection of 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 and dust-removing system is used for purification. The coal machinery is effectively sealed, and the coal-charging smoke and dust collection facilities installed on the coal-charging truck or above the furnace door on the side of the machine are used to capture the escaping coal-loading smoke and dust, and then the captured smoke and dust are sent to the coal charging through the dust removal pipeline. Purification is carried out in the dust removal system. For this reason, it is necessary to build a corresponding coal-loading and dust-removing ground station system or a vehicle-mounted coal-loading and dust-removing system. A certain amount of power media such as water, compressed air, steam, and electric energy are also consumed during operation. 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.

With the development of the coking industry and the increasing emphasis on energy saving and consumption reduction, the coal humidity control technology that reduces the moisture content of the coal entering the furnace by drying and preheating before being loaded into the coking chamber has attracted the attention of the industry. The coal humidity control technology reduces the energy consumption of coking, but in the practice of implementing this technology, it is inevitable to encounter the problem of a large increase in the coal dust introduced into the gas system during the coal charging process due to the reduction of coal moisture. The large increase of coal has a serious impact on the follow-up gas purification system and the quality of tar. Therefore, many enterprises are often discouraged from using coal humidity control technology, and the promotion of coal humidity control technology encounters great resistance.

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 top-loading coke oven loading coal-loading smoke and dust treatment system, which can effectively avoid the unfavorable running of the gas purification system and equipment and the deterioration of the quality of tar products caused by the introduction of the smoke and dust generated during the coal-charging process of the top-loading coke oven into the gas system. and other problems, to promote the application of coal humidity control technology.

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

A top-loading coke oven charging soot treatment system includes a top-loading coal-loading sealing device, a gas cut-off valve, a flue gas guide three-way A, a flue gas cut-off valve, a flue gas guide three-way B, a dry dust removal device, a fan and a gas mixer. Mixing device; the top of the carbonization chamber of the top-loading coke oven is provided with a rising pipe, the middle of the rising 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 interface 2 of the smoke tee A is arranged opposite to the interface 1, and a water seal valve is arranged on the interface 2; the interface 3 of the smoke guide tee A is connected with the interface 1 of the smoke guide tee B through the connection pipe 1, and the connection pipe 1 is on the upper side. A flue gas cut-off valve is provided; the second and third interfaces of the smoke guide tee B are respectively connected with the corresponding interfaces of the smoke guide tee B of the corresponding side carbonization chamber through the second connecting pipe, and the multiple connecting pipes two are connected in series to form a The coal-loading smoke and dust pipeline on the furnace top; the furnace-top coal-loading smoke and dust pipeline is sequentially connected to the dry dust removal device, the fan and the gas mixing device through the smoke and dust conveying pipeline; Coal-loading sealing device on the top of the barrel furnace.

The first connecting pipe and the smoke and dust conveying pipe are all inclined.

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

The furnace top coal charging sealing device is composed of an inner sleeve, a sliding sleeve, a sealing connection sleeve and an outer sleeve which are sequentially arranged from the inside to the outside. The coal hopper discharge port is connected; the sliding sleeve can slide vertically along the inner sleeve; the sealing connection sleeve is connected with the coal hopper through the outer sleeve, and the bottom end of the sealing connection sleeve is provided with a spherical structure to cooperate with the coal charging hole seat. Sealing the coal charging hole; the outer sleeve is provided with a retractable flexible connection structure.

The outer sleeve is also provided with a smoke and dust outlet, and the annular channel between the sliding sleeve and the sealing connection sleeve is used as a smoke guide channel, and is connected to the smoke and dust collection pipe on the coal charging truck through the smoke and dust outlet, and the smoke and dust are collected. The pipeline is additionally connected to a dry dust removal device.

The dry dust removal device is a bag type dust collector, and a pre-sprayed powder inlet is set on the smoke and dust conveying pipeline upstream of the dry dust collector. , Dry dust removal device cleaning and pre-spray powder conveying are all using compressed nitrogen as the power source.

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, Proven, OPR and other smokeless coal charging systems are omitted. The use of dry dust removal devices combined with the application of the pre-spraying process can Realizing the effective purification of smoke and dust, avoiding the secondary pollution of water caused by wet dust removal, can 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.

5) It is beneficial to the application and promotion of the coal humidity control process;

By collecting the flue gas with a large amount of coal dust generated when the coke oven is charged with coal separately, the influence of a large increase in the coal dust in the flue gas generated when the coal is charged due to the implementation of the coal humidity control technology on the gas purification system is eliminated. The "side effects" produced by the implementation of the humidity control technology restrict the application of the coal humidity control process, which will be beneficial to the application and promotion of the coal humidity control process.

Description of drawings

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

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

Fig. 3 is the working state schematic diagram 1 (before coal charging) of the furnace top coal charging sealing device according to the present invention.

Fig. 4 is a schematic diagram 2 of the working state of the furnace top coal charging sealing device according to the present invention (in the process of coal charging).

Fig. 5 is the working state schematic diagram 3 (before coal charging) of the furnace top coal charging sealing device according to the present invention.

FIG. 6 is a schematic diagram 4 of the working state of the furnace top coal charging sealing device according to the present invention (in the process of charging coal).

In the figure: 1. Top-loading coke oven 2. Coal-loading sealing device on the top of the furnace 21. Coal hopper 22. Inner sleeve 23. Sliding sleeve 24. Sealing connection sleeve 25. Outer sleeve 26. Retractable flexible connection structure 27 .Spherical structure 28. Dust collection pipe 3. Rising pipe 4. Gas cut-off valve 5. Smoke guide tee A 6. Flue gas cut-off valve 7. Smoke guide tee B 8. Dry dust removal device 9. Fan 10. Gas admixture Mixing device 11. Balance valve 12. Soot conveying pipeline 13. Coal into the furnace 14. Gas collecting pipe 15. Water sealing valve 16. Coal loading hole

Detailed ways

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

[Example 1]

As shown in Figures 1 and 2, a top-loading coke oven coal-loading soot treatment system according to the present utility model includes a furnace-top coal-loading sealing device 2, a gas cut-off valve 4, a flue-conducting tee A5, and a flue gas cut-off device. Valve 6, smoke guide tee B 7, dry dust removal device 8, fan 9 and gas mixing device 10; the top of the carbonization chamber of the top-mounted coke oven 1 is provided with a rising pipe 3, and the middle of the rising pipe 3 is connected to the gas collecting pipe through a bridge pipe 14. A gas cut-off valve 4 is arranged on the bridge pipe; the top of the rising pipe 3 is connected with the interface 1 of the flue-conducting tee A5, the interface 2 of the flue-conducting tee A5 is arranged opposite to the interface 1, and the interface 2 is provided with a water seal valve 15; the interface 3 of the smoke guide tee A5 is connected with the interface 1 of the smoke guide tee B 7 through the connection pipe 1, and the connection pipe 1 is provided with a flue gas cut-off valve 6; the interface 2 of the smoke guide tee B 7 , the interface 3 is respectively connected with the corresponding interface of the smoke-conducting tee B7 of the corresponding side carbonization chamber through the connecting pipe 2, and the plurality of connecting pipes 2 are connected in series to form the furnace top coal-loading smoke and dust pipeline; The conveying pipeline 12 is sequentially connected to the dry dust removal device 8, the fan 9 and the gas mixing device 10; the furnace top coal charging and sealing device 2 is arranged on the furnace top coal charging truck, and is a sleeve type furnace top coal charging and sealing device.

The gas shut-off valve 4 can be a water-sealing valve in the prior art, or can be any form of device capable of conducting and shutting off the gas passage between the riser 3 and the gas collecting pipe 14 by opening and closing. The water seal valve 15 adopts the conventionally used riser water seal valve.

The first connecting pipe and the soot conveying pipe 12 are both inclined and arranged, which can prevent the coal dust in the coal loading soot from depositing in the soot passage and block the soot passage.

Along the flue gas flow direction, the initial end of the coal-loading soot pipe on the top of the furnace is connected with the gas collecting pipe 14 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 guaranteed.

As shown in Figures 3 and 4, the furnace top coal charging sealing device 2 is composed of an inner sleeve 22, a sliding sleeve 23, a sealing connection sleeve 24 and an outer sleeve 25 which are sequentially arranged from the inside to the outside. The sleeve 22 is the lower coal passage, the top of which is connected to the discharge port of the coal hopper 21 of the coal charging truck; the sliding sleeve 23 can slide vertically along the inner sleeve 22; the sealing connection sleeve 24 is connected to the coal hopper through the outer sleeve 25 21 is connected, and the bottom end of the sealing connection sleeve 24 is provided with a spherical surface structure 27 to cooperate with the coal charging hole seat to seal the coal charging hole 16;

During coal charging, the soot generated in the carbonization chamber cannot escape from the coal charging hole 16 under the action of the spherical seal between the bottom end of the sealing connection sleeve 24 and the coal charging hole seat and the negative pressure caused by the fan 9, thereby realizing coal charging Process of anthracite charging. Different from the existing furnace top coal charging sealing device, the utility model adopts the form of the sealing connecting sleeve 24 and the spherical surface of the coal charging hole seat to cooperate and seal, which can effectively prevent the coal charging smoke and dust from escaping. The inhalation of ambient air during the capture process improves the safety of the coal-loading soot capture and treatment system.

The dry dust removal device 8 is a bag type dust collector, and a pre-sprayed powder inlet is set on the smoke and dust conveying pipeline 12 upstream of the dry dust collector 8. The pre-sprayed powder is collected from coke oven dust removal or dry quenching coke dust removal. Compressed nitrogen is used as the power source for dust removal and pre-spraying powder conveying in the dry dust removal device 8, so as to avoid the explosion hazard of the system due to the use of compressed air to increase the oxygen content in the smoke and dust.

A top-loading coke oven charging soot treatment process, comprising the following steps:

1) Before starting the coal charging operation into the carbonization chamber, by closing the gas shut-off valve 4 on the bridge pipe, the riser pipe 3 corresponding to the carbonization chamber is cut off from the gas collecting pipe 14, and the water seal valve 15 is closed simultaneously to isolate the riser pipe 3 from the atmosphere; To avoid the coal loading smoke and dust generated during coal loading from entering the gas purification system by mistake;

2) The coal charging truck moves to the top of the corresponding carbonization chamber. After opening the coal charging hole cover, the sliding sleeve 23 and the sealing connection sleeve 24 fall down, and the spherical structure 27 at the bottom end of the sealing connection sleeve 24 is in close contact with the coal charging hole seat. The coal charging hole 16 is sealed to prevent the coal charging smoke and dust generated in the carbonization chamber during coal charging from escaping to the surroundings of the top charging coke oven through the coal charging hole 16 and causing environmental pollution.

3) Open the flue gas cut-off valve 6 corresponding to the coalification chamber to be installed, so that the rising pipe 3 is communicated with the coal-loading smoke and dust pipeline on the top of the furnace; 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 coal charging dust generated during coal charging is effectively captured;

4) Under the action of the fan 9, a large amount of smoke and dust generated during coal loading enters the dry type 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. The dust removal device 8 uses compressed nitrogen to send the coke powder for pre-spraying into the dust conveying pipeline 12 upstream of the dry dust removal device 8. In the dry dust removal device 8, the filter bag removes the coal dust in the smoke and adsorbs tar and other particles. The coke powder of the viscous component is removed, and the purified flue gas enters the gas mixing device 10 under the action of the fan 9, and then is sent to the gas pipeline for heating the coke oven for the heating of the top-mounted coke oven 1 itself; The blending device 10 can fully mix the coal-loading flue gas removed from the coal dust and the coal gas for heating the coke oven to be used for the combustion and heating of the top-loading coke oven. Full and efficient use.

5) After the coal charging is completed, the sliding sleeve 23 and the sealing connection sleeve 24 are lifted, the coal charging truck is removed, and the coal charging hole 16 is sealed with the coal charging hole cover; at this time, the gas shut-off valve 4 on the bridge pipe is opened, Connect the rising pipe 3 corresponding to the carbonization chamber with the gas collecting pipe 14; close the previously opened flue gas cut-off valve 6 to cut off the passage between the rising pipe 3 and the furnace top coal-loading soot pipe. 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 carries only a small amount of dust. Therefore, the gas introduced into the gas purification system during the non-coal charging period will be used for subsequent purification. The adverse effects of dust in treatment facilities will be basically eliminated, and the quality of tar will also be greatly improved.

[Example 2]

In this embodiment, on the basis of adopting the technical solution of Embodiment 1, as shown in Figures 5 and 6 , the outer sleeve 25 is also provided with a fume outlet, and the sliding sleeve 23 is sealed with the connection sleeve The annular channel between 24 is used as a smoke guide channel, and is connected to the smoke and dust collection pipe 28 on the coal charging truck through the smoke and dust outlet port, and the smoke and dust collection pipe 28 is additionally connected to the dry dust removal device 8 .

When the furnace top coal charging sealing device 2 with the soot collecting pipe 28 is used, during the coal charging process, the soot escaping from the carbonization chamber at the coal charging hole 16 is guided by the smoke between the sliding sleeve 23 and the sealing connection sleeve 24 The channel is led out, and sent to the dry dust removal device 8 through the dust collection pipe 28 for purification.

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 (6)

1. A top-loading coke oven coal-loading smoke dust treatment system is characterized by comprising a top-loading coal sealing device, a gas cut-off valve, a smoke guide tee joint A, a smoke cut-off valve, a smoke guide tee joint B, a dry type dust removal device, a fan and a gas mixing device; the top of a carbonization chamber of the top-mounted coke oven is provided with an ascending pipe, the middle part of the ascending pipe is connected with a gas collecting pipe through a bridge pipe, and the bridge pipe is provided with a gas cut-off valve; the top of the ascending pipe is connected with a first connector of a smoke guide tee joint A, a second connector of the smoke guide tee joint A is arranged opposite to the first connector, and a water seal valve is arranged on the second connector; a third connector of the smoke guide tee joint A is connected with a first connector 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 second and third interfaces of the smoke guide tee joint B are respectively connected with the corresponding interfaces of the smoke guide tee joint B of the carbonization chamber at the corresponding side through second connecting pipelines, and a plurality of second connecting pipelines are sequentially connected in series to form a coal charging smoke dust pipeline at the top of the furnace; the furnace top coal charging smoke pipeline is sequentially connected with the dry type dust removal device, the fan and the coal gas mixing device through a smoke conveying pipeline; the furnace top coal charging sealing device is arranged on the furnace top coal charging vehicle and is a sleeve type furnace top coal charging sealing device.

2. The coal charging smoke treatment system of the top-loading coke oven of claim 1, wherein the first connecting pipeline and the smoke conveying pipeline are both arranged obliquely.

3. The system of claim 1, wherein the starting end of the top-loading coke oven coal-charging flue gas conduit is connected to the gas collecting pipe via a communicating pipe along the flue gas flow direction, and the communicating pipe is provided with a balance valve.

4. The coal charging smoke dust treatment system of the top-charging coke oven of claim 1, wherein the top-charging coal sealing device is composed of an inner sleeve, a sliding sleeve, a sealing connecting sleeve and an outer sleeve which are arranged in sequence from inside to outside, the inner sleeve is a coal feeding channel, and the top of the inner sleeve is connected with a coal hopper discharge port of a coal charging car; the sliding sleeve can vertically slide along the inner sleeve; the bottom end of the sealing connecting sleeve is provided with a spherical structure which is matched with the coal charging hole seat to realize the sealing of the coal charging hole; the outer sleeve is provided with a telescopic flexible connecting structure.

5. The coal charging smoke treatment system of the top-loading coke oven as claimed in claim 4, wherein the outer sleeve is further provided with a smoke outlet, the annular channel between the sliding sleeve and the sealing connecting sleeve is used as a smoke guide channel, and is connected with a smoke collecting pipeline on the coal charging car through the smoke outlet, and the smoke collecting pipeline is additionally connected with a dry dust removal device.

6. The top-loading coke oven coal-charging smoke treatment system according to claim 1, wherein the dry dust removal device is a bag type dust remover, a pre-spraying powder inlet is arranged on a smoke dust conveying pipeline at the upstream of the dry dust remover, the pre-spraying powder adopts coke powder collected from coke oven coke discharging dust removal or dry quenching dust removal, and compressed nitrogen is adopted as a power source for ash removal of the dry dust removal device and conveying of the pre-spraying powder.

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