A coke oven flue gas treatment system and method

Abstract

The present invention provides a coke oven flue gas treatment system and a coke oven flue gas treatment method, comprising a coke powder conveying device, a tar adsorption device and a bag dust removal device, wherein the coke powder conveying device is connected to the tar adsorption device, the tar adsorption device is connected to the bag dust removal device, the coke powder conveying device is used to convey coke powder to the tar adsorption device, the tar adsorption device is used to mix coke oven flue gas and coke powder, and the bag dust removal device is used to filter coke oven flue gas and coke powder. The present invention can fully mix coke oven flue gas with coke powder, and adsorb tar and harmful gases in coke oven flue gas through coke powder, thereby effectively recovering tar and harmful gases in coke oven flue gas.

Description

Technical Field

[0001] The invention relates to the technical field of coke oven flue gas treatment, and in particular to a coke oven flue gas treatment system and method. Background Art

[0002] With the continuous improvement of environmental protection requirements, the emission requirements for particulate matter in dust are becoming more and more stringent. In order to achieve the requirements of ultra-low emissions, for coke oven flue gas with complex components, it is necessary to further strengthen the dust control in the flue gas. Since coke oven flue gas often contains a lot of tar, and these tars have strong viscosity, tar is easy to adhere to the surface of the bag in the bag filter, which increases the resistance of the bag filter, seriously affects the operation of the bag filter, and easily affects the subsequent coke oven flue gas treatment process.

[0003] At present, the commonly used process for treating tar in coke oven flue gas is the electrostatic tar capture method. After long-term operation of this method, foreign matter such as tar is easily attached to the insulator, which requires regular cleaning and maintenance. In addition, this method is difficult to use for flue gas treatment with large gas volumes and cannot effectively remove tar in coke oven flue gas. In addition, there are other harmful gases such as benzene series and H2S in coke oven flue gas. Traditional bag filters can only treat the particulate matter that can be captured, but are helpless against gaseous harmful substances.

[0004] Therefore, there is an urgent need for a new coke oven flue gas treatment system and method to effectively recover tar and harmful gases in the coke oven flue gas. Summary of the invention

[0005] The object of the present invention is to provide a coke oven flue gas treatment system and method to solve the problem that the existing coke oven flue gas treatment system and method cannot effectively recover tar and harmful gases in the coke oven flue gas.

[0006] In order to solve the above technical problems, the present invention provides a coke oven flue gas treatment system, including a coke powder conveying device, a tar adsorption device and a bag dust removal device, the coke powder conveying device is connected to the tar adsorption device, the tar adsorption device is connected to the bag dust removal device, the coke powder conveying device is used to convey coke powder to the tar adsorption device, the tar adsorption device is used to mix coke oven flue gas and coke powder, and the bag dust removal device is used to filter coke oven flue gas and coke powder.

[0007] Optionally, the coke powder conveying device includes a coke powder storage bin, a first rotary feeder, a powder feeding trough and a first fluidizing fan, the coke powder storage bin is connected to one end of the first rotary feeder, the other end of the first rotary feeder is connected to one end of the powder feeding trough, the other end of the powder feeding trough is connected to the tar adsorption device, the outlet of the first fluidizing fan is connected to the powder feeding trough, the first rotary feeder is used to convey the coke powder in the coke powder storage bin to the powder feeding trough, and the first fluidizing fan is used to blow the coke powder in the powder feeding trough into the tar adsorption device.

[0008] Optionally, the tar adsorption device includes a mixing tube, a Venturi reactor and a reaction chamber, one end of the mixing tube is the coke oven flue gas inlet, the other end of the mixing tube is connected to the inlet of the Venturi reactor, the outlet of the Venturi reactor is connected to the inlet of the reaction chamber, the outlet of the reaction chamber is connected to the bag dust removal device, and the mixing tube is connected to the powder feeding trough.

[0009] Optionally, the tar adsorption device includes a mixing tube, a venturi reactor and a reaction chamber, one end of the mixing tube is a coke oven flue gas inlet, the other end of the mixing tube is connected to the inlet of the venturi reactor, the outlet of the venturi reactor is connected to the inlet of the reaction chamber, the outlet of the reaction chamber is connected to the bag dust removal device, and the mixing tube is connected to the powder feeding trough, wherein the outer diameters of the mixing tube and the reaction chamber are larger than the outer diameter of the venturi reactor.

[0010] Optionally, the Venturi reactor includes an outer sleeve and a Venturi tube, the outer sleeve includes a first mixing section and a second mixing section, the Venturi tube is arranged in the second mixing section along the axial direction of the outer sleeve, one end of the first mixing section is connected to the other end of the mixing tube, the other end of the first mixing section is connected to one end of the Venturi tube, and the other end of the Venturi tube is connected to the inlet of the reaction chamber.

[0011] Optionally, the venturi tube includes an inlet section, a throat section and an outlet section, one end of the inlet section is connected to the other end of the first mixing section, the other end of the inlet section is connected to one end of the throat section, the other end of the throat section is connected to one end of the outlet section, the other end of the outlet section is connected to the inlet of the reaction chamber, the outer diameter of the end of the inlet section away from the throat section is larger than the outer diameter of the end of the inlet section close to the throat section, the outer diameter of the end of the outlet section away from the throat section is larger than the outer diameter of the end of the outlet section close to the throat section, and the outer diameter of the throat section is equal from one end of the throat section to the other end of the throat section.

[0012] Optionally, the bag-type dust removal device includes a bag-type dust collector and an induced draft fan, the bag-type dust collector is connected to the outlet of the reaction chamber and the inlet of the induced draft fan, and the induced draft fan is used to suck the gas in the bag-type dust collector.

[0013] Optionally, it also includes a coke powder circulating fluidization device, which is connected to the bag dust removal device and the tar adsorption device, and is used to collect dust generated by the bag dust removal device and transport the dust to the tar adsorption device.

[0014] The present invention also provides a coke oven flue gas treatment method of the above coke oven flue gas treatment system, wherein the coke oven flue gas treatment system comprises a coke powder conveying device, a tar adsorption device and a bag dust removal device, wherein the coke powder conveying device is connected to the tar adsorption device, and the tar adsorption device is connected to the bag dust removal device, wherein the coke oven flue gas treatment method comprises:

[0015] conveying coke powder to the tar adsorption device through the coke powder conveying device;

[0016] mixing coke oven flue gas and coke powder through the tar adsorption device;

[0017] The coke oven flue gas and coke powder are filtered through the bag dust removal device.

[0018] Optionally, before the coke oven flue gas and coke powder are mixed through the tar adsorption device, the coke oven flue gas is disconnected to pre-spray the coke powder into the bag filter device.

[0019] The present invention provides a coke oven flue gas treatment system and method, which has the following beneficial effects:

[0020] Since the coke powder conveying device is used to convey coke powder to the tar adsorption device, the coke powder conveying device is connected with the tar adsorption device, and the tar adsorption device is used to mix the coke oven flue gas and coke powder, the coke oven flue gas and coke powder can be fully mixed, and the tar and harmful gases in the coke oven flue gas can be adsorbed by the coke powder. Since the tar adsorption device is connected with the bag-type dust removal device, and the bag-type dust removal device is used to filter the coke oven flue gas and coke powder, the dust can be separated from the gas through the bag-type dust removal device, and by recovering the dust, the tar, harmful gases and coke powder in the coke oven flue gas can be effectively recovered. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a structural schematic diagram of a coke oven flue gas treatment system in an embodiment of the present invention;

[0022] Figure 2 is a top view of a Venturi reactor in a coke oven flue gas treatment system in an embodiment of the present invention;

[0023] Figure 3 yes Figure 2 Cross-sectional view of the Chinese Qiuli reactor along line AA.

[0024] Description of reference numerals:

[0025] 110-coke powder storage bin; 120-first rotary feeder; 130-powder delivery trough; 140-first fluidizing fan;

[0026] 210-mixing tube; 220-Venturi reactor; 221-outer sleeve; 222-Venturi tube; 223-inlet section, 224-throat section; 225-outlet section; 226-first mixing section; 227-second mixing section; 230-reaction chamber;

[0027] 320-filter chamber; 321-first filter chamber; 322-second filter chamber; 330-bag; 340-induced draft fan;

[0028] 400-ash storage;

[0029] 510-circulation trough; 520-second rotary feeder. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0034] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The present invention provides a coke oven flue gas treatment system. Figure 1 , Figure 1 : is a structural schematic diagram of a coke oven flue gas treatment system in an embodiment of the present invention, the coke oven flue gas treatment system comprises a coke powder conveying device, a tar adsorption device and a bag dust removal device. The coke powder conveying device is connected to the tar adsorption device, the tar adsorption device is connected to the bag dust removal device, the coke powder conveying device is used to convey coke powder to the tar adsorption device, the tar adsorption device is used to mix coke oven flue gas and coke powder, and the bag dust removal device is used to filter coke oven flue gas and coke powder.

[0037] Since the coke powder conveying device is used to convey coke powder to the tar adsorption device, the coke powder conveying device is connected with the tar adsorption device, and the tar adsorption device is used to mix the coke oven flue gas and coke powder, the coke oven flue gas and coke powder can be fully mixed, and the tar and harmful gases in the coke oven flue gas can be adsorbed by the coke powder. Since the tar adsorption device is connected with the bag-type dust removal device, and the bag-type dust removal device is used to filter the coke oven flue gas and coke powder, the dust can be separated from the gas through the bag-type dust removal device, and by recovering the dust, the tar, harmful gases and coke powder in the coke oven flue gas can be effectively recovered.

[0038] The dust is the dust captured by the bag dust removal device when filtering the coke oven flue gas and coke powder. The dust includes coke powder that has not absorbed tar and / or absorbed harmful gases, coke powder that has absorbed tar and / or absorbed harmful gases, and particulate matter in the coke oven flue gas. The coke powder can be the coke powder collected by the coke outlet dust removal system of the coke oven plant.

[0039] Specifically, refer to Figure 1 The coke powder conveying device includes a coke powder storage bin 110, a first rotary feeder 120, a powder feeding trough 130, and a first fluidizing fan 140. The coke powder storage bin 110 is connected to one end of the first rotary feeder 120, the other end of the first rotary feeder 120 is connected to one end of the powder feeding trough 130, the other end of the powder feeding trough 130 is connected to the tar adsorption device, and the outlet of the first fluidizing fan 140 is connected to the powder feeding trough 130. The first rotary feeder 120 is used to convey the coke powder in the coke powder storage bin 110 to the powder feeding trough 130, and the first fluidizing fan 140 is used to blow the coke powder in the powder feeding trough 130 to the tar adsorption device.

[0040] refer to Figure 1 The tar adsorption device includes a mixing tube 210, a venturi reactor 220 and a reaction chamber 230, one end of the mixing tube 210 is a coke oven flue gas inlet, the other end of the mixing tube 210 is connected to the inlet of the venturi reactor 220, the outlet of the venturi reactor 220 is connected to the inlet of the reaction chamber 230, the outlet of the reaction chamber 230 is connected to the bag dust removal device, and the mixing tube 210 is connected to the powder feeding trough 130. The outer diameters of the mixing tube 210 and the reaction chamber 230 are greater than the outer diameter of the venturi reactor 220.

[0041] Specifically, refer to Figure 2 and Figure 3 , Figure 2 is a top view of the Venturi reactor 220 in the coke oven flue gas treatment system in an embodiment of the present invention, Figure 3 yes Figure 2The cross-sectional view of the Venturi reactor 220 along the AA line, the Venturi reactor 220 includes an outer sleeve 221 and a Venturi tube 222, the outer sleeve 221 includes a first mixing section 226 and a second mixing section 227, the Venturi tube 222 is arranged in the second mixing section 227 along the axial direction of the outer sleeve 221, one end of the first mixing section 226 is connected to the other end of the mixing tube 210, the other end of the first mixing section 226 is connected to one end of the Venturi tube 222, and the other end of the Venturi tube 222 is connected to the inlet of the reaction chamber 230. The first mixing section and the second mixing section are fixedly connected.

[0042] The venturi tube 222 includes an inlet section 223, a throat section 224 and an outlet section 225. One end of the inlet section 223 is connected to the other end of the first mixing section 226, the other end of the inlet section 223 is connected to one end of the throat section 224, the other end of the throat section 224 is connected to one end of the outlet section 225, and the other end of the outlet section 225 is connected to the inlet of the reaction chamber 230. The outer diameter of the end of the inlet section 223 away from the throat section 224 is greater than the outer diameter of the end of the inlet section 223 close to the throat section 224, the outer diameter of the end of the outlet section 225 away from the throat section 224 is greater than the outer diameter of the end of the outlet section 225 close to the throat section 224, and the outer diameter of the throat section 224 is equal from one end of the throat section 224 to the other end of the throat section 224. In this way, the coke oven smoke and coke powder can be fully mixed.

[0043] like Figure 2 As shown, the throat section 224 is in the shape of a hollow cylinder, and the inlet section 223 and the outlet section 225 are in the shape of a hollow truncated cone. The throat section 224 is connected to the small ends of the inlet section 223 and the outlet section 225, respectively.

[0044] The number of the venturi tubes 222 may be at least two. Compared with the venturi reactor 220 having only one venturi tube 222 , the venturi reactor 220 may enable the coke oven flue gas and the coke powder to be mixed more evenly.

[0045] like Figure 2 As shown, in this embodiment, the number of the venturi tubes 222 is 7.

[0046] The tar adsorption device further includes an air distribution plate, which is disposed at one end of the mixing tube 210. The connection between the powder feeding trough 130 and the mixing tube 210 is located between the air distribution plate and the venturi reactor 220, and the air distribution plate can evenly mix the coke oven flue gas and the coke powder.

[0047] refer to Figure 1The bag dust removal device includes a bag dust collector and an induced draft fan 340. The bag dust collector is connected to the outlet of the reaction chamber 230 and the inlet of the induced draft fan 340, and the induced draft fan 340 is used to suck the gas in the bag dust collector.

[0048] Specifically, the bag filter includes a filter chamber 320 and a bag 330 , and the bag 330 divides the filter chamber 320 into a first filter chamber 321 and a second filter chamber 322 , the first filter chamber 321 is connected to the outlet of the reaction chamber 230 , and the second filter chamber 322 is connected to the inlet of the induced draft fan 340 .

[0049] Preferably, the filter bin 320 is vertically arranged to facilitate dust collection.

[0050] refer to Figure 1 The coke oven flue gas treatment system further includes an ash bin 400. The ash bin 400 is connected to the first filter bin 321 in the bag filter device, and the ash bin 400 is used to collect dust.

[0051] refer to Figure 1 The coke oven flue gas treatment system further includes a coke powder circulating fluidization device. The coke powder circulating fluidization device is connected to the bag dust removal device and the tar adsorption device. The coke powder circulating fluidization device is used to collect dust generated by the bag dust removal device and transport the dust to the tar adsorption device. By providing the coke powder circulating fluidization device, the recycling of coke powder can be achieved, and the utilization rate of coke powder can be improved.

[0052] Specifically, the coke powder circulating fluidized device includes a circulation trough 510 and a second rotary feeder 520, one end of the second rotary feeder 520 is connected to the first filter bin 321 in the bag dust removal device, the other end of the second rotary feeder 520 is connected to one end of the circulation trough 510, the other end of the circulation trough 510 is connected to the mixing tube 210 in the tar adsorption device, and the connection point between the other end of the circulation trough 510 and the mixing tube 210 in the tar adsorption device is located between the air distribution plate and the Venturi reactor 220, the outlet of the first fluidizing fan 140 is connected to the circulation trough 510, the second feeder is used to transport the dust in the first filter bin 321 to the circulation trough 510, and the first fluidizing fan 140 is used to blow the dust in the circulation trough 510 to the tar adsorption device. In other embodiments, a second fluidizing fan is further included, wherein the outlet of the second fluidizing fan is connected to the circulation trough 510, and the second fluidizing fan is used to blow the dust in the circulation trough 510 into the tar adsorption device, and the outlet of the first fluidizing fan 140 is only connected to the powder feeding trough 130, and the first fluidizing fan 140 is only used to blow the coke powder in the powder feeding trough 130 into the tar adsorption device.

[0053] According to the dust falling condition of the bag filter, the amount of coke powder in the powder feeding trough 130 can be adjusted by the first rotary feeder 120 to adjust the powder spraying amount, thereby ensuring that the coke powder fully absorbs the tar in the flue gas and fully utilizes the coke powder.

[0054] According to the dust falling condition of the bag filter, the amount of coke powder in the circulation tank 510 can be adjusted by the second rotary feeder 520 to adjust the amount of powder spraying, thereby ensuring that the coke powder fully absorbs the tar in the flue gas and fully utilizes the coke powder.

[0055] The process of treating coke oven flue gas by the coke oven flue gas treatment system is as follows:

[0056] First, when starting the system, the coke oven flue gas is disconnected first, the induced draft fan 340 is operated at a low frequency, and the coke powder in the coke powder storage bin 110 is transported to the powder feeding trough 130 through the first rotary feeder 120, so that the coke powder in the powder feeding trough 130 is blown to the tar adsorption device through the first fluidizing fan 140, and then the coke powder is transported to the bag-type dust collector under the action of the induced draft fan, and the coke powder is pre-sprayed on the bag 330 in the bag-type dust collector to avoid the incompletely adsorbed tar from adhering to the bag 330 during the later operation, thereby increasing the resistance of the bag-type dust collector, seriously affecting the operation of the bag-type dust collector, and easily affecting the subsequent coke oven flue gas treatment process.

[0057] Secondly, after a period of time, the coke oven flue gas is allowed to enter the mixing tube 210, and the frequency of the induced draft fan 340 is adjusted. The coke oven flue gas and coke powder entering the mixing tube 210 begin to mix and flow through the mixing tube 210, the venturi reactor 220 and the reaction chamber 230 in sequence, and flow into the first filter chamber 321 in the bag 330 dust removal device. Thereafter, the mixture of coke oven flue gas and coke powder is filtered by the bag 330 and the dust is captured. The captured dust falls on the bottom of the first filter chamber 321, and the gas in the mixture of coke oven flue gas and coke powder passes through the bag 330 and flows to the subsequent process under the action of the induced draft fan 340.

[0058] Afterwards, part of the dust falling on the bottom of the first filter bin 321 flows into the ash bin 400, and part of the dust is transported to the circulation trough 510 through the second feeder, and under the action of the first fluidizing fan 140, the dust in the circulation trough 510 is blown to the tar adsorption device.

[0059] This embodiment also provides a coke oven flue gas treatment method of the above coke oven flue gas treatment system, wherein the coke oven flue gas treatment system comprises a coke powder conveying device, a tar adsorption device and a bag dust removal device, wherein the coke powder conveying device is connected to the tar adsorption device, and the tar adsorption device is connected to the bag dust removal device, wherein the coke oven flue gas treatment method comprises:

[0060] First, the coke powder is transported to the tar adsorption device through the coke powder transport device;

[0061] Secondly, the coke oven flue gas and coke powder are mixed by the tar adsorption device;

[0062] Again, the coke oven flue gas and coke powder are filtered through a bag dust removal device.

[0063] Furthermore, before the coke oven flue gas and coke powder are mixed by the tar adsorption device, the coke oven flue gas is disconnected so as to pre-spray the coke powder into the bag dust removal device.

[0064] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A coke oven flue gas treatment system, characterized in that: The invention comprises a coke powder conveying device, a tar adsorption device and a bag dust removal device, wherein the coke powder conveying device is connected to the tar adsorption device, the tar adsorption device is connected to the bag dust removal device, the coke powder conveying device is used to convey coke powder to the tar adsorption device, the tar adsorption device is used to mix coke oven flue gas and coke powder, and the bag dust removal device is used to filter coke oven flue gas and coke powder; the coke powder conveying device comprises a coke powder storage bin, a first rotary feeder, a powder feeding trough and a first fluidizing fan, the coke powder storage bin is connected to one end of the first rotary feeder The other end of the first rotary feeder is communicated with one end of the powder feeding trough, the other end of the powder feeding trough is communicated with the tar adsorption device, the outlet of the first fluidizing fan is communicated with the powder feeding trough, the first rotary feeder is used to transport the coke powder in the coke powder storage bin to the powder feeding trough, and the first fluidizing fan is used to blow the coke powder in the powder feeding trough to the tar adsorption device; the tar adsorption device includes a mixing tube, a venturi reactor and a reaction bin, one end of the mixing tube is a coke oven flue gas inlet, and the other end of the mixing tube is connected to the The inlet of the Venturi reactor is communicated with the inlet of the reaction chamber, the outlet of the reaction chamber is communicated with the bag dust removal device, and the mixing tube is communicated with the powder feeding trough; the tar adsorption device comprises a mixing tube, a Venturi reactor and a reaction chamber, one end of the mixing tube is a coke oven flue gas inlet, the other end of the mixing tube is communicated with the inlet of the Venturi reactor, the outlet of the Venturi reactor is communicated with the inlet of the reaction chamber, the outlet of the reaction chamber is communicated with the bag dust removal device, and the mixing tube is communicated with the powder feeding trough, wherein the outer diameters of the mixing tube and the reaction chamber are greater than the outer diameter of the Venturi reactor; the Venturi reactor comprises an outer sleeve and a Venturi tube, the outer sleeve comprises a first mixing section and a second mixing section, the Venturi tube is arranged in the second mixing section along the axial direction of the outer sleeve, one end of the first mixing section is communicated with the other end of the mixing tube, the other end of the first mixing section is communicated with one end of the Venturi tube, and the other end of the Venturi tube is communicated with the inlet of the reaction chamber; the number of the Venturi tubes is at least two.

2. The coke oven flue gas treatment system according to claim 1, characterized in that: The venturi tube includes an inlet section, a throat section and an outlet section, one end of the inlet section is connected to the other end of the first mixing section, the other end of the inlet section is connected to one end of the throat section, the other end of the throat section is connected to one end of the outlet section, and the other end of the outlet section is connected to the inlet of the reaction chamber, the outer diameter of the end of the inlet section away from the throat section is greater than the outer diameter of the end of the inlet section close to the throat section, the outer diameter of the end of the outlet section away from the throat section is greater than the outer diameter of the end of the outlet section close to the throat section, and the outer diameter of the throat section is equal from one end of the throat section to the other end of the throat section.

3. The coke oven flue gas treatment system according to claim 1, characterized in that: The bag dust removal device includes a bag dust collector and an induced draft fan. The bag dust collector is connected to the outlet of the reaction chamber and the inlet of the induced draft fan. The induced draft fan is used to suck the gas in the bag dust collector.

4. The coke oven flue gas treatment system according to claim 1, characterized in that: It also includes a coke powder circulating fluidization device, which is connected to the bag dust removal device and the tar adsorption device. The coke powder circulating fluidization device is used to collect dust generated by the bag dust removal device and transport the dust to the tar adsorption device.

5. A coke oven flue gas treatment method of the coke oven flue gas treatment system according to any one of claims 1 to 4, characterized in that: The coke oven flue gas treatment system comprises a coke powder conveying device, a tar adsorption device and a bag dust removal device, wherein the coke powder conveying device is connected to the tar adsorption device, and the tar adsorption device is connected to the bag dust removal device, wherein the coke oven flue gas treatment method comprises: conveying coke powder to the tar adsorption device through the coke powder conveying device; mixing coke oven flue gas and coke powder through the tar adsorption device; The coke oven flue gas and coke powder are filtered through the bag dust removal device.

6. The coke oven flue gas treatment method according to claim 5, characterized in that: Before the coke oven flue gas and coke powder are mixed through the tar adsorption device, the coke oven flue gas is disconnected so as to pre-spray the coke powder in the bag dust removal device.

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