阅读说明：本技术 尾气处理设备 (Tail gas treatment equipment ) 是由 吴泽轶 蒋勇明 吴亚平 陈新 于 2021-09-08 设计创作，主要内容包括：本发明实施例公开的一种尾气处理设备例如包括：尾气导入管；余热回收组件,包括烟管和套管,所述套管套设在所述烟管之外、且与所述烟管间隔设置,所述尾气导入管贯穿所述套管并延伸至所述烟管内；沉降室,连通所述烟管；尾气燃烧组件,连通在所述沉降室和所述套管之间；以及尾气排出管,连通所述套管。本发明实施例可充分利用燃烧处理后的尾气的热量,提升能量利用率,节约能源。(The embodiment of the invention discloses a tail gas treatment device, which comprises: a tail gas inlet pipe; the waste heat recovery assembly comprises a smoke tube and a sleeve, the sleeve is sleeved outside the smoke tube and is arranged at an interval with the smoke tube, and the tail gas introducing pipe penetrates through the sleeve and extends into the smoke tube; the settling chamber is communicated with the smoke pipe; the tail gas combustion assembly is communicated between the settling chamber and the sleeve; and the tail gas discharge pipe is communicated with the sleeve. The embodiment of the invention can fully utilize the heat of the tail gas after combustion treatment, improve the energy utilization rate and save energy.)

1. An exhaust gas treatment device, comprising:

a tail gas inlet pipe;

the waste heat recovery assembly comprises a smoke tube and a sleeve, the sleeve is sleeved outside the smoke tube and is arranged at an interval with the smoke tube, and the tail gas introducing pipe penetrates through the sleeve and the smoke tube and extends into the smoke tube;

the settling chamber is communicated with the smoke tube and is internally provided with a pressure detection unit;

a tail gas combustion assembly in communication between the settling chamber and the sleeve and comprising:

the combustor is provided with a combustor inlet and a combustor outlet, and the combustor inlet is communicated with the settling chamber; and

the combustor is provided with a combustor inlet and a combustor outlet, the combustor outlet is arranged at the combustor inlet and communicated with the combustor inlet, and the combustor outlet is communicated with the sleeve; a spiral groove is formed in the inner wall of the combustion chamber, and the axis of the outlet of the combustor is tangent to the spiral groove;

the dust remover is communicated with the sleeve;

the exhaust fan is communicated with the dust remover;

the tail gas discharge pipe is communicated with the exhaust fan; and

and the control unit is electrically connected with the pressure detection unit and the exhaust fan.

2. An exhaust gas treatment device, comprising:

a tail gas inlet pipe;

the waste heat recovery assembly comprises a smoke tube and a sleeve, the sleeve is sleeved outside the smoke tube and is arranged at an interval with the smoke tube, and the tail gas introducing pipe penetrates through the sleeve and extends into the smoke tube;

the settling chamber is communicated with the smoke pipe;

the tail gas combustion assembly is communicated between the settling chamber and the sleeve; and

and the tail gas discharge pipe is communicated with the sleeve.

3. The exhaust gas treatment device of claim 2, wherein the exhaust gas combustion assembly comprises:

the combustor is provided with a combustor inlet and a combustor outlet, and the combustor inlet is communicated with the settling chamber; and

the combustor is provided with a combustor inlet and a combustor outlet, the combustor outlet is arranged at the combustor inlet and communicated with the combustor inlet, and the combustor outlet is communicated with the sleeve; the inner wall of the combustion chamber is provided with a spiral groove, and the axis of the outlet of the combustor is tangent to the spiral groove.

4. The exhaust gas treatment device according to claim 3, wherein the combustion chamber comprises a first combustion chamber and a second combustion chamber which are communicated with each other, the first combustion chamber and the second combustion chamber are respectively provided with the spiral groove, the combustion chamber inlet is arranged on one side of the first combustion chamber, and the combustion chamber outlet is arranged on the opposite side of the second combustion chamber from the combustion chamber inlet.

5. The exhaust gas treatment apparatus of claim 2, wherein a heating assembly is disposed within the settling chamber, the heating assembly being configured to heat the exhaust gas passing through the flue tube.

6. The exhaust gas treatment device according to claim 2, further comprising a dust filter, wherein an outlet of the dust filter is communicated with the exhaust gas introduction pipe.

7. The exhaust gas treatment device of claim 2, further comprising a temperature regulator in communication between the exhaust gas combustion assembly and the sleeve.

8. The exhaust gas treatment device according to claim 2, further comprising a dust separator in communication between the sleeve and the exhaust gas discharge pipe.

9. The exhaust gas treatment device according to claim 8, further comprising an exhaust fan disposed between the dust separator and the exhaust gas discharge pipe; a pressure detection unit is arranged in the settling chamber; the tail gas treatment equipment further comprises a control unit, the control unit is connected with the pressure detection unit and the exhaust fan, and the pressure detection unit is used for detecting the pressure of the tail gas in the settling chamber to obtain a tail gas pressure signal and sending the tail gas pressure signal to the control unit; the control unit is used for sending a control instruction to the exhaust fan according to the tail gas pressure signal to control the action of the exhaust fan so as to control the pressure of the tail gas in the settling chamber to be in a negative pressure state.

10. The exhaust gas treatment device according to claim 1 or 2, further comprising a nitrogen inlet pipe, wherein the settling chamber is communicated with one end of the smoke pipe, and the nitrogen inlet pipe is communicated with one end of the smoke pipe, which is far away from the settling chamber.

Technical Field

The invention relates to the technical field of battery cathode materials, in particular to tail gas treatment equipment.

Background

The graphite cathode material of the lithium ion battery contains a large amount of asphalt smoke in exhaust gas discharged in the granulating and carbonizing processes, wherein the asphalt smoke is a smoke-like substance, contains a large amount of polycyclic aromatic hydrocarbon and a small amount of heterocyclic mixture of oxygen, nitrogen and sulfur, and usually exists in air in the form of aerosol. The asphalt fume contains thousands of substances, and the analyzed substances contain more than 100 of naphthalene, phenanthrene carbazole, imidacloprid, pyridine, anthracene, phenol, pyrrole, indole, indene and the like, and the substances can cause harm to human bodies, animals and plants. In addition to direct contact with the asphalt fumes, the asphalt fumes escaping into the atmosphere often adhere to fly ash of various types and different particles, and the asphalt fumes are extremely complex in composition, but the basic component is a hydrocarbon that can be burned under certain temperature conditions. When the roasting temperature reaches above 790 ℃, the retention time is 0.5S more, and the hydrocarbon substances can be completely combusted. Even a small amount of carbon particles mixed in the smoke can be burnt when the secondary decomposition or combustion temperature reaches above 900 ℃. However, the tail gas treatment of the existing tail gas treatment equipment has the problems that tar in the tail gas is condensed and adhered to the inner wall of the tail gas treatment equipment, even the tail gas is not thoroughly treated, and the like, so that the tar cannot be combusted and treated, and the tar causes great harm to the environment and human bodies.

Disclosure of Invention

In order to overcome at least part of defects or shortcomings in the prior art, the embodiment of the invention provides the tail gas treatment equipment, which makes full use of the heat of the tail gas after combustion treatment to solve the problem that tar is adhered and condensed on the inner wall of the smoke tube and cannot be thoroughly treated, improves the energy utilization rate and saves energy.

Specifically, the invention provides an exhaust gas treatment device, which comprises: a tail gas inlet pipe; the waste heat recovery assembly comprises a smoke tube and a sleeve, the sleeve is sleeved outside the smoke tube and is arranged at an interval with the smoke tube, and the tail gas introducing pipe penetrates through the sleeve and the smoke tube and extends into the smoke tube; the settling chamber is communicated with the smoke tube and is internally provided with a pressure detection unit; a tail gas combustion assembly in communication between the settling chamber and the sleeve and comprising: the combustor is provided with a combustor inlet and a combustor outlet, and the combustor inlet is communicated with the settling chamber; the combustor is provided with a combustor inlet and a combustor outlet, the combustor outlet is arranged at the combustor inlet and communicated with the combustor inlet, and the combustor outlet is communicated with the sleeve; a spiral groove is formed in the inner wall of the combustion chamber, and the axis of the outlet of the combustor is tangent to the spiral groove; the dust remover is communicated with the sleeve; the exhaust fan is communicated with the dust remover; the tail gas discharge pipe is communicated with the exhaust fan; and the control unit is electrically connected with the pressure detection unit and the exhaust fan.

In another aspect, an exhaust gas treatment device provided in an embodiment of the present invention includes: a tail gas inlet pipe; the waste heat recovery assembly comprises a smoke tube and a sleeve, the sleeve is sleeved outside the smoke tube and is arranged at an interval with the smoke tube, and the tail gas introducing pipe penetrates through the sleeve and extends into the smoke tube; the settling chamber is communicated with the smoke pipe; the tail gas combustion assembly is communicated between the settling chamber and the sleeve; and the tail gas discharge pipe is communicated with the sleeve.

In one embodiment of the invention, the exhaust gas combustion assembly comprises: the combustor is provided with a combustor inlet and a combustor outlet, and the combustor inlet is communicated with the settling chamber; the combustor is provided with a combustor inlet and a combustor outlet, the combustor outlet is arranged at the combustor inlet and communicated with the combustor inlet, and the combustor outlet is communicated with the sleeve; the inner wall of the combustion chamber is provided with a spiral groove, and the axis of the outlet of the combustor is tangent to the spiral groove.

In one embodiment of the present invention, the combustion chamber includes a first combustion chamber and a second combustion chamber which are communicated with each other, the first combustion chamber and the second combustion chamber are respectively provided with the spiral groove, the combustion chamber inlet is arranged at one side of the first combustion chamber, and the combustion chamber outlet is arranged at the opposite side of the second combustion chamber from the combustion chamber inlet.

In one embodiment of the present invention, a heating assembly is disposed in the settling chamber, and the heating assembly is used for heating the tail gas passing through the smoke tube.

In an embodiment of the present invention, the exhaust gas treatment equipment further includes a dust filter, and an outlet of the dust filter is communicated with the exhaust gas introducing pipe.

In one embodiment of the invention, the tail gas treatment device further comprises a temperature regulator, wherein the temperature regulator is communicated between the tail gas combustion assembly and the sleeve.

In one embodiment of the present invention, the tail gas treatment device further comprises a dust remover, and the dust remover is communicated between the sleeve and the tail gas discharge pipe.

In one embodiment of the present invention, the exhaust gas treatment apparatus further comprises an exhaust fan disposed between the dust remover and the exhaust gas discharge pipe; a pressure detection unit is arranged in the settling chamber; the tail gas treatment equipment further comprises a control unit, the control unit is connected with the pressure detection unit and the exhaust fan, and the pressure detection unit is used for detecting the pressure of the tail gas in the settling chamber to obtain a tail gas pressure signal and sending the tail gas pressure signal to the control unit; the control unit is used for sending a control instruction to the exhaust fan according to the tail gas pressure signal to control the action of the exhaust fan so as to control the pressure of the tail gas in the settling chamber to be in a negative pressure state.

In an embodiment of the present invention, the tail gas treatment equipment further includes a nitrogen inlet pipe, the settling chamber is communicated with one end of the smoke pipe, and the nitrogen inlet pipe is communicated with one end of the smoke pipe, which is far away from the settling chamber.

The technical scheme can have one or more of the following advantages and beneficial effects: according to the tail gas treatment equipment provided by the embodiment of the invention, the sleeve is sleeved outside the smoke tube, and the treated tail gas is introduced into the sleeve to heat the smoke tube and the tail gas which is not subjected to combustion treatment in the smoke tube, namely, the heat (waste heat) after the combustion treatment is recovered, so that the temperature of the tail gas which is not subjected to combustion treatment in the smoke tube is increased, and therefore, the asphalt smoke and the tar in the tail gas which is not subjected to combustion treatment are in a gaseous state, and are not adhered and condensed on the inner wall of the smoke tube, but are sent to the tail gas combustion assembly for combustion treatment, so that the heat of the tail gas after the combustion treatment is fully utilized, the energy utilization rate is improved, and the energy is saved; meanwhile, tail gas which is not combusted reaches the tail gas combustion assembly in a gaseous state, so that the tail gas treatment efficiency is improved, the adhesion and deposition of the tail gas in equipment are reduced, and the failure rate of the equipment is reduced. In addition, can subside substances such as dust, granule in the tail gas through setting up the deposit room, promote the efficiency of tail gas treatment, further reduce the pollutant in the tail gas after the discharge, further protect atmospheric environment. In addition, through set up the thread groove on the combustion chamber inner wall, can be so that the tail gas that carries out combustion processing advances along the spiral groove, can stay longer time in the combustion chamber for the tail gas burning is more abundant. Moreover, through setting up first combustion inner chamber and second combustion inner chamber, and the distribution is provided with the thread groove to set up combustion chamber entry and combustion chamber export respectively on first combustion inner chamber and second combustion inner chamber relative lateral wall, tail gas passes through first combustion inner chamber and second combustion inner chamber along the thread groove in proper order, can further make the tail gas that carries out combustion processing can stay longer time in the combustion chamber, makes the tail gas burning more abundant. In addition, through setting up temperature regulator, can carry out temperature control to the tail gas after tail gas combustion assembly burning processing for the temperature of the tail gas after the burning can realize heating the tail gas in the tobacco pipe under suitable temperature, can make the temperature of the tail gas after the burning reduce to some extent again, thereby lifting means's security. In addition, through setting up dust filter, can filter the tail gas that produces in the preparation process of lithium ion battery graphite cathode material, filter dust and particulate matter in the tail gas, purify tail gas before tail gas combustion processing, be favorable to reducing the pollutant in the tail gas. The heating assembly is arranged in the settling chamber, so that the tail gas passing through the smoke tube can be heated, the tail gas is not condensed and adhered to the inner wall of the equipment, but is continuously introduced into the tail gas combustion chamber in a gaseous state for combustion treatment, the tail gas can be more fully treated, and the emission standard is met; meanwhile, the cleanliness of the equipment is improved, the fault rate is reduced, and the maintenance cost of the equipment is saved. Through setting up the dust remover, can get rid of dust and particulate matter in the tail gas after the burning to further promote the cleanliness of tail gas after the burning. Through setting up control unit, air exhauster to and set up pressure detecting element in the settling chamber, can control the pressure of tail gas in the settling chamber, for example be in little negative pressure state, can make tail gas enter into tobacco pipe and settling chamber more smoothly, be favorable to the tail gas to be handled. Through setting up the nitrogen gas inlet tube, can take place when burning at the tail gas in deposit room and/or the chimney, through nitrogen gas inlet tube introduction nitrogen gas, extinguish the flame in deposit room and/or the chimney rapidly, improve equipment's security.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an exhaust gas treatment device according to an embodiment of the present invention.

Fig. 2 is another schematic structural view of the exhaust gas combustion assembly of the exhaust gas treatment apparatus shown in fig. 1.

Fig. 3 is a schematic structural diagram of another tail gas treatment device according to an embodiment of the present invention.

Fig. 4 is a schematic connection diagram of a control unit in the exhaust gas treatment device according to the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, an embodiment of the present invention provides an exhaust gas treatment device 10. The tail gas treatment device 10 may be applied to tail gas (or exhaust gas) discharged from a lithium ion battery graphite anode material in a preparation process, such as granulation and carbonization. Specifically, the exhaust gas treatment device 10 mainly includes, for example: the exhaust gas introduction pipe 100, the waste heat recovery unit 200, the settling chamber 300, the exhaust gas combustion unit 400, and the exhaust gas discharge pipe 500 may further include auxiliary devices such as a dust collector 600, an exhaust fan 700, a nitrogen protection pipe 800, a dust filter 900, and a control unit CU.

The tail gas introducing pipe 100 is, for example, a tubular part, connected to production equipment of the lithium ion battery graphite negative electrode material, such as a granulation kettle, a carbonization kettle, and the like, and configured to introduce tail gas (also referred to as waste gas) generated in the preparation process of the lithium ion battery graphite negative electrode material, so that the tail gas is treated by the tail gas treatment equipment 10, and the treated tail gas meets the emission standard.

In addition, the waste heat recovery assembly 200 includes, for example, a flue tube 210 and a sleeve 220. The sleeve 220 is sleeved outside the smoke tube 210, and the sleeve 220 and the smoke tube 210 are arranged at intervals, that is, a gap is formed between the inner wall of the sleeve 220 and the outer wall of the smoke tube 210. Wherein both ends of the sleeve 220 are closed. The tail gas inlet pipe 100 penetrates through the sleeve 220 and the smoke pipe 210 and extends into the smoke pipe 210, so as to introduce the tail gas generated in the preparation process of the lithium ion battery graphite cathode material into the smoke pipe 210. Specifically, one end (e.g., the upper end in fig. 1) of the clearance space between the smoke tube 210 and the sleeve 220 is closed, and the settling chamber 300 communicates with one end (e.g., the lower end in fig. 1) of the smoke tube 210. Further, there may be a plurality of exhaust gas introduction pipes 100 for respectively introducing exhaust gases generated by different devices in the preparation process of the graphite anode material of the lithium ion battery, or different stages of the same device. Further, the sleeve 220 is used to introduce the exhaust gas after the combustion process. Because the temperature of the burned tail gas is relatively high, the temperature of the flue pipe 210 and the tail gas inside the flue pipe 210 without being burned is heated, so that the temperature of the tail gas without being burned in the flue pipe 210 is increased, and asphalt smoke and tar in the tail gas without being burned are in a gaseous state, so that the asphalt smoke and tar are not adhered to and condensed on the inner wall of the flue pipe 210.

The settling chamber 300 is communicated with the smoke tube 210 of the waste heat recovery assembly 200 to perform settling treatment on the tail gas passing through the smoke tube 210, and then to lead out the settled tail gas. The settling chamber 300 is, for example, a tank-type component, and is provided with a tail gas inlet and a tail gas outlet, wherein the tail gas inlet is communicated with the smoke pipe 210, and the tail gas outlet is connected to the tail gas combustion assembly 400, so as to perform combustion treatment on the settled tail gas.

The tail gas combustion assembly 400 is used for performing combustion treatment on a large amount of polycyclic aromatic hydrocarbons and a small amount of heterocyclic mixtures of oxygen, nitrogen and sulfur in tail gas entering the tail gas combustion assembly, so that the tail gas after combustion meets the emission standard. The tail gas combustion assembly 400 is communicated between the settling chamber 300 and the casing 220 to introduce and combust the tail gas that has not been subjected to the combustion treatment from the settling chamber 300, and then discharge the combusted tail gas through the casing 220. Preferably, the tail gas combustion assembly 400 is in communication with the lower end of the sleeve 220.

The exhaust gas discharge pipe 500 is, for example, a tubular component, and is connected to the sleeve 220, for example, an end of the sleeve 220 far away from the settling chamber 300, that is, an upper end of the sleeve 220, and is used for discharging the burned exhaust gas passing through the sleeve 220.

In the tail gas treatment equipment 10 provided in the above embodiment of the present invention, the sleeve 220 is sleeved outside the smoke tube 210, and the treated tail gas is introduced into the sleeve 220, so as to heat the smoke tube 210 and the tail gas which is not subjected to combustion treatment inside the smoke tube 210, that is, to recover the heat (waste heat) after the combustion treatment, so that the temperature of the tail gas which is not subjected to combustion treatment inside the smoke tube 210 is increased, and thus the asphalt smoke and tar in the tail gas which is not subjected to combustion treatment are in a gaseous state, and are not adhered to and condensed on the inner wall of the smoke tube 210, but are sent to the tail gas combustion assembly 400 for combustion treatment, so that the heat of the tail gas after combustion treatment is fully utilized, the energy utilization rate is improved, and the energy is saved; meanwhile, tail gas which is not combusted reaches the tail gas combustion assembly 400 in a gaseous state, so that the tail gas treatment efficiency is improved, the adhesion and deposition of the tail gas in equipment are reduced, and the failure rate of the equipment is reduced. In addition, can subside substances such as dust, granule in the tail gas through setting up deposit room 300, promote the efficiency of tail gas treatment, further reduce the pollutant in the tail gas after the discharge, further protect atmospheric environment.

Further, as shown in FIG. 2, an exhaust gas combustion assembly 400, such as a complete combustion system, for example, includes a combustor 410 and a combustion chamber 420. The combustion temperature in the combustion chamber 420 is, for example, at 800-. The burner 410 includes, for example, a burner, an igniter, a burner controller, an actuator, an electromagnetic valve, a proportional valve, and other components, and may also include auxiliary components such as a gas filter and a pressure stabilizer. The burner 410 is provided with, for example, a burner inlet 411 and a burner outlet 412. The combustion chamber 420 is provided with a combustion chamber inlet 421 and a combustion chamber outlet 422. The burner outlet 422 is disposed at the combustion chamber inlet 421 and communicates with the combustion chamber inlet 421. The burner inlet 411 communicates with the settling chamber 300, for example by piping, to introduce the tail gas that has not undergone the combustion process. The combustion chamber outlet 422 is in communication with the sleeve 220 via a conduit. The inner wall of the combustion chamber is provided with a spiral groove 425, and the axis of the burner outlet 412 is tangential to the spiral groove 425. In this way, the exhaust gas subjected to the combustion treatment can be made to travel along the spiral groove 425, and can stay in the combustion chamber 420 for a longer time, so that the exhaust gas can be more sufficiently combusted. Further, as shown in fig. 2, the combustion chamber 420 includes, for example, a first combustion chamber 423 and a second combustion chamber 424 which are communicated with each other, and the inner walls of the first combustion chamber 423 and the second combustion chamber 424 are respectively provided with the spiral groove 425. The combustion chamber inlet 421 is disposed on a side of the first combustion inner cavity 423 away from the second combustion inner cavity 424, and the combustion chamber outlet 422 is disposed on a side of the second combustion inner cavity 424 away from the first combustion inner cavity 423, that is, the combustion chamber inlet 421 and the combustion chamber outlet 422 are disposed on opposite outer sidewalls of the first combustion inner cavity 423 and the second combustion inner cavity 424, respectively. In this way, the exhaust gas passes through the first combustion chamber 423 and the second combustion chamber 424 along the spiral groove 425 in sequence, which further enables the exhaust gas subjected to the combustion treatment to stay in the combustion chamber 420 for a longer time, so that the exhaust gas can be more sufficiently combusted.

In addition, as shown in fig. 3, the exhaust gas treatment device 10 may further include a temperature regulator 500, and the temperature regulator 500 is communicated between the exhaust gas combustion assembly 400 and the sleeve 220. The temperature regulator 500 is used for controlling the temperature of the tail gas after the combustion treatment of the tail gas combustion assembly 400, so that the temperature of the tail gas after the combustion can be properly controlled, the tail gas in the smoke tube 210 can be heated, the temperature of the tail gas after the combustion can be reduced, and the safety of the equipment is improved. The temperature regulator 500 may be, for example, a water-cooled settling device in the prior art, and the structure thereof will not be described herein. After being adjusted by the temperature adjuster 500, the temperature range of the tail gas is, for example, 300-.

As shown in fig. 3, the exhaust gas treatment device 10 may further include a dust filter 900, and an outlet of the dust filter 900 is connected to the exhaust gas inlet pipe 100. The dust filter 900 is used for filtering tail gas generated in the preparation process of the graphite cathode material of the lithium ion battery, filtering dust and particulate matters in the tail gas, purifying the tail gas before the tail gas combustion treatment, and reducing pollutants in the tail gas. The dust filter 900 may be a conventional filter device, and the structure thereof will not be described herein. Preferably, the number of the dust filters 900 is multiple, and the dust filters correspond to the exhaust gas introduction pipes 100 one by one, so as to respectively filter the exhaust gases generated by different devices in the preparation process of the graphite anode material of the lithium ion battery, or different stages of the same device.

Further, as shown in fig. 3, a heating assembly 320 is also disposed in the settling chamber 300. The temperature of the exhaust gas passing through the smoke tube 210 is slightly lowered, and tar, dust and other substances in the exhaust gas may be condensed and adhered to the inner wall of the smoke tube 210 or the inner wall of the settling chamber 300. Therefore, the heating assembly 320 is arranged in the settling chamber 300 and is used for heating the tail gas passing through the smoke tube 210, so that the tail gas is not condensed and adhered to the inner wall of the equipment, but is continuously introduced into the tail gas combustion chamber 400 in a gaseous state for combustion treatment, which is beneficial to more fully treating the tail gas and achieving the emission standard; meanwhile, the cleanliness of the equipment is improved, the fault rate is reduced, and the maintenance cost of the equipment is saved.

Further, as shown in fig. 3, the exhaust gas treatment device 10 may further include a dust remover 600, and the dust remover 600 is communicated between the sleeve 220 and the exhaust gas discharge pipe 500. Specifically, the dust collector 600 is communicated with the upper end of the sleeve 220, and is used for removing dust and particulate matters in the burned tail gas, so as to further improve the cleanliness of the burned tail gas. The dust collector 600 is, for example, a cyclone dust collector, and the structure thereof will not be described in detail.

In other embodiments of the present invention, as shown in fig. 3 and 4, the tail gas treatment device 10 may further include an exhaust fan 700. The exhaust fan 700 is communicated between the dust separator 600 and the exhaust gas discharge pipe 220. In addition, a pressure detecting unit 310 is provided in the settling chamber 300. The exhaust gas treatment device 10 may also comprise a control unit CU. The control unit CU is for example a microprocessor, a processor or an embedded processor. A control unit CU connects the pressure detection unit 310 and the suction fan 700. The pressure detection unit 310 may be, for example, an air pressure sensing device, and is configured to detect a pressure of the exhaust gas in the settling chamber 300 to obtain an exhaust gas pressure signal, and send the exhaust gas pressure signal to the control unit CU; the control unit CU is configured to send a control command to the exhaust fan 700 according to the exhaust gas pressure signal to control the action of the exhaust fan 700, so as to control the pressure of the exhaust gas in the settling chamber 300, for example, to control the pressure of the exhaust gas in the settling chamber 300 to be in a negative pressure state. Preferably, the pressure of the tail gas in the settling chamber 300 is in a slightly negative pressure state, for example, the pressure P of the tail gas in the settling chamber 300 can be controlled in a range of: 0.2KPa < P <0, so that the tail gas can enter the smoke tube 210 and the settling chamber 300 more smoothly, and excessive dust and particulate matters are prevented from being pumped out as much as possible, thereby being beneficial to tail gas treatment.

Furthermore, as shown in fig. 4, the control unit CU is also connected to a temperature regulator 500 for controlling the temperature of the exhaust gases led out from the combustion chamber 420. The control unit CU is further connected to the combustion assembly 400 for controlling the combustion of the tail gas, such as the feeding amount of the tail gas, the feeding amount of the fuel gas, and the like, so as to realize the automatic control of the tail gas combustion treatment.

As shown in fig. 3, the exhaust gas treatment device 10 further includes a nitrogen inlet pipe 800, for example. The settling chamber 300 is communicated with one end of the smoke tube 210, such as the lower end of the smoke tube 210, and the nitrogen inlet tube 800 is communicated with one end of the smoke tube 210, which is far away from the settling chamber 300, such as the upper end of the smoke tube 210. When the tail gas in the settling chamber 300 and/or the smoke tube 210 is combusted, nitrogen can be introduced through the nitrogen inlet tube 800, so that the flame in the settling chamber 300 and/or the smoke tube 210 can be quickly extinguished, and the safety of the equipment is improved.

In summary, in the tail gas treatment apparatus 10 provided in the above embodiment of the present invention, the sleeve 220 is sleeved outside the smoke tube 210, and the treated tail gas is introduced into the sleeve 220, so as to heat the smoke tube 210 and the tail gas inside the smoke tube 210 that is not subjected to the combustion treatment, that is, recover heat (waste heat) after the combustion treatment, so that the temperature of the tail gas in the smoke tube 210 that is not subjected to the combustion treatment is increased, and asphalt smoke and tar in the tail gas that is not subjected to the combustion treatment are in a gaseous state, and thus are not adhered to and condensed on the inner wall of the smoke tube 210, but are sent to the tail gas combustion assembly 400 for the combustion treatment, so that the heat of the tail gas after the combustion treatment is fully utilized, the energy utilization rate is increased, and energy is saved; meanwhile, tail gas which is not combusted reaches the tail gas combustion assembly 400 in a gaseous state, so that the tail gas treatment efficiency is improved, the adhesion and deposition of the tail gas in equipment are reduced, and the failure rate of the equipment is reduced. In addition, can subside substances such as dust, granule in the tail gas through setting up deposit room 300, promote the efficiency of tail gas treatment, further reduce the pollutant in the tail gas after the discharge, further protect atmospheric environment. In addition, by providing the spiral groove on the inner wall of the combustion chamber, the exhaust gas subjected to the combustion treatment can be made to travel along the spiral groove 425, and can stay in the combustion chamber 420 for a longer time, so that the exhaust gas can be more sufficiently combusted. Furthermore, by arranging the first combustion inner cavity and the second combustion inner cavity, and arranging the thread grooves in a distributed manner, and arranging the combustion chamber inlet 421 and the combustion chamber outlet 422 on the opposite outer side walls of the first combustion inner cavity 423 and the second combustion inner cavity 424 respectively, the exhaust gas passes through the first combustion inner cavity 423 and the second combustion inner cavity 424 along the thread grooves 425 in sequence, the exhaust gas subjected to the combustion treatment can be further enabled to stay in the combustion chamber 420 for a longer time, so that the exhaust gas can be combusted more sufficiently. In addition, through setting up temperature regulator 500, can carry out temperature control to the tail gas after tail gas combustion assembly 400 combustion processing for the temperature of the tail gas after the burning can realize heating the tail gas in tobacco pipe 210 under suitable temperature, can make the temperature of the tail gas after the burning reduce to some extent again, thereby lifting means's security. In addition, through setting up dust filter 900, can filter the tail gas that produces in the preparation process of lithium ion battery graphite cathode material, filter the dust and the particulate matter in the tail gas, purify tail gas before tail gas combustion processing, be favorable to reducing the pollutant in the tail gas. The heating assembly 320 is arranged in the settling chamber 300, so that the tail gas passing through the smoke tube 210 can be heated, the tail gas is not condensed and adhered to the inner wall of the equipment, but is continuously introduced into the tail gas combustion chamber 400 in a gaseous state for combustion treatment, the tail gas can be more sufficiently treated, and the emission standard is met; meanwhile, the cleanliness of the equipment is improved, the fault rate is reduced, and the maintenance cost of the equipment is saved. Through setting up dust remover 600, can get rid of the dust and the particulate matter in the tail gas after the burning to further promote the cleanliness of tail gas after the burning. By arranging the control unit CU and the exhaust fan 700 and the pressure detection unit 310 in the settling chamber 300, the pressure of the tail gas in the settling chamber 300 can be controlled, for example, in a micro-negative pressure state, so that the tail gas can enter the smoke tube 210 and the settling chamber 300 more smoothly, which is beneficial to tail gas treatment. By arranging the nitrogen inlet pipe 800, nitrogen can be introduced through the nitrogen inlet pipe 800 when the tail gas in the settling chamber 300 and/or the smoke pipe 210 is combusted, so that flames in the settling chamber 300 and/or the smoke pipe 210 can be quickly extinguished, and the safety of the equipment is improved.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition. Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.