Waste gas treatment equipment for lithium battery factory

Abstract

The utility model discloses waste gas treatment equipment for a lithium battery factory, and belongs to the technical field of waste gas treatment. A gas inlet is formed in one side of the box body, a fluorine removal unit, a filtering unit, an adsorption unit, a catalytic oxidation unit and an air outlet unit are sequentially arranged in the box body in the gas flowing direction, and the air outlet unit is connected with the box body and used for discharging treated gas; a control unit is also arranged in the box body, is electrically connected with the fluorine removal unit, the filtering unit, the adsorption unit and the catalytic oxidation unit, and is used for monitoring the working state of each unit and adjusting the operating parameters of each unit. The waste gas treatment units are integrated in the box body, waste gas is purified through the units and then discharged out of the box body, harmful substances in the waste gas are efficiently removed, and the environment-friendly emission standard is met. The equipment is integrally designed, space is saved, and installation and maintenance are convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas treatment technical field, specifically, relate to a lithium battery factory waste gas treatment equipment. BACKGROUND

[0002] With the rapid development of new energy industry, lithium battery as important energy storage device is widely used. In the production process of lithium battery, the waste gas containing volatile organic compounds (VOCs), acid gas, dust and various pollutants will cause serious pollution to the environment if directly discharged.

[0003] Through the search, the prior art has carried out purification treatment to waste gas, for example, the Chinese patent document with the publication number CN116036835A discloses a lithium battery electrolyte waste gas treatment system, which comprises a pretreatment system and a main treatment system used in cooperation;The pretreatment system comprises: a buffer tank, an alkali washing tower, a water washing tower, a demister, a NaOH dosing tank, a circulating water pump and a dosing pump;The main treatment system comprises: a filter, a zeolite runner, an adsorption fan, a heater, a heat exchanger, a catalytic combustion device, a desorption fan, a fire retardant, a pneumatic regulating valve and an exhaust cylinder;After the waste gas is pretreated by alkali washing to remove acidic fluoride, water washing to remove residual acidic substances and part of organic matter, and demisting to remove fluoride, it enters the main treatment system to carry out pre-filter heating and dehumidification, zeolite runner treatment, and finally emits clean gas meeting environmental protection requirements.

[0004] However, the waste gas treatment system comprises a pretreatment system and a main treatment system, and the use of multiple devices in series combination in the two systems leads to the problems of large floor area, high investment and operation cost. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a lithium battery factory waste gas treatment equipment, solving the problems of large floor area, high investment and operation cost caused by the use of multiple devices in series combination in the lithium battery factory waste gas treatment system in the prior art.

[0006] In order to realize the above-mentioned purpose, the utility model provides a lithium battery factory waste gas treatment equipment, which comprises a box body;One side of the box body is provided with an air inlet, and a defluorination unit, a filter unit, an adsorption unit, a catalytic oxidation unit and an air outlet unit are sequentially arranged in the box body along the gas flow direction, the air outlet unit is connected with the box body and is used for discharging the treated gas;A control unit is further arranged in the box body, and the control unit is electrically connected with the defluorination unit, the filter unit, the adsorption unit and the catalytic oxidation unit, and is used for monitoring the working state of each unit and adjusting the operation parameters of each unit.

[0007] By the above technical scheme, the defluorination unit, the filtering unit, the adsorption unit, the catalytic oxidation unit and the air outlet unit are integrated in the cabinet, the waste gas enters the cabinet from the air inlet of the cabinet, passes through each unit to complete waste gas purification and is discharged out of the cabinet, efficient removal of harmful substances in the waste gas is realized, and the environmental protection emission standard is met. The equipment is designed in an integrated manner, space is saved, and installation and maintenance are convenient. The control unit is used for monitoring the working state of each unit and adjusting the operating parameters of each unit, the treatment process and parameters can be flexibly adjusted according to different compositions and concentrations of waste gas, the degree of automation is high, the labor operation cost is reduced, and the continuity and reliability of the waste gas treatment process are ensured.

[0008] Further, the air inlet end of the defluorination unit is arranged close to the air inlet, and part of space is left between the air inlet end of the defluorination unit and the air inlet for uniform air distribution.

[0009] The space for uniform air distribution can provide a buffer space for the waste gas entering the air inlet, so that the airflow distribution and speed are self-adjusted, and the waste gas is evenly introduced into the defluorination unit.

[0010] Further, the defluorination unit comprises a defluorination tank and a plurality of filler units, the plurality of filler units are detachably connected with the defluorination tank, and the defluorination filler is arranged in the filler unit.

[0011] The filler unit is detachably connected with the defluorination tank, so that the defluorination filler in the filler unit can be replaced, thereby ensuring good defluorination effect.

[0012] Further, the filtering unit is integrally connected with the air outlet end of the defluorination unit, and the plate filter is arranged in the filtering unit.

[0013] The integrated connection mode can improve the integration of the filtering unit and the defluorination unit, increase the sealing property of the connection between the two, and reduce or even avoid waste gas leakage. The plate filter has a large windward surface, so the dust amount is large and the wind speed is low, which is very suitable for application in the integrated waste gas treatment equipment.

[0014] Further, the adsorption unit and the filtering unit are connected through a pipeline, the filtering unit is provided with a rotating wheel, the rotating wheel comprises a component made of adsorption material, and the rotating wheel is connected with a driving mechanism and driven to rotate by the driving mechanism. The component made of adsorption material in the rotating wheel can effectively adsorb volatile organic compounds in the waste gas, the rotating wheel can increase the contact between the component made of adsorption material and the waste gas by rotating, and thus the adsorption efficiency is improved.

[0015] Further, the catalytic oxidation unit comprises a combustion furnace, and a catalyst device is arranged in the combustion furnace and used for promoting combustion of the organic matter and oxygen in the combustion furnace.

[0016] Further, the catalytic oxidation unit is connected with the adsorption unit through a variable-diameter pipeline.

[0017] Further, a heating blowing device is arranged between the adsorption unit and the catalytic oxidation unit, and the heating blowing device is used for desorbing VOCs components in the waste gas and blowing the VOCs components into the catalytic oxidation unit.

[0018] Further, a negative pressure device is arranged in the box body, and the negative pressure device enables the waste gas to enter from the air inlet and sequentially pass through the defluorination unit, the filtration unit, the adsorption unit, the catalytic oxidation unit and the air outlet unit and then be discharged.

[0019] Further, the box body is provided with a plurality of maintenance doors, and the maintenance doors are closed to seal the box body and are opened to enable the box body to communicate with the outside.

[0020] Compared with the prior art, the technical scheme has the following beneficial effects:

[0021] The lithium battery factory waste gas treatment equipment integrates the defluorination unit, the filtration unit, the adsorption unit, the catalytic oxidation unit and the air outlet unit in the box body, the waste gas enters the box body from the air inlet of the box body, passes through the units to be purified and then is discharged out of the box body, the harmful substances in the waste gas are efficiently removed, and the environmental protection emission standard is met.

[0022] Obviously, the elements or features described in the above single embodiment can be used alone or in combination in other embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0023] In the drawings, the size and the proportion do not represent the size and the proportion of the actual product. The drawings are merely illustrative, and some unnecessary elements or features are omitted for the sake of clarity.

[0024] Figure 1 It is the internal structure schematic view of the waste gas treatment equipment of the utility model embodiment.

[0025] Explanation of reference signs

[0026] 100, box; 101, air inlet; 110, fluorine removal unit; 111, fluorine removal tank; 112, filler unit; 120, filtration unit; 130, adsorption unit; 140, heating blowing device; 150, air outlet unit; 160, negative pressure equipment; 170, control unit; 180, catalytic oxidation unit; 190, access door. DETAILED DESCRIPTION

[0027] Next, the utility model will be described in detail with reference to the drawings. What is described here is only according to the preferred embodiment of the utility model, and those skilled in the art can think of other ways that can realize the utility model on the basis of the preferred embodiment, and other ways also fall within the scope of the utility model.

[0028] Reference Figure 1 , the embodiment provides a kind of waste gas treatment equipment of lithium battery factory, including box 100, box 100 presents as square structure, it is the structure of whole airtight, prevent unprocessed waste gas to leak outward. Air inlet 101 is set to one side of box 100, air inlet 101 is connected by collection pipeline to the waste gas of lithium battery factory. Box 100 is sequentially provided with fluorine removal unit 110, filtration unit 120, adsorption unit 130, catalytic oxidation unit 180 and air outlet unit 150 in inside along gas flow direction, air outlet unit 150 is connected with box 100 for discharging gas after processing. Waste gas enters box 100 inside from the air inlet 101 of box 100, and is completed waste gas purification by each unit again discharges from box 100, realizes the efficient removal of harmful substances in waste gas, satisfies environmental protection emission standard. Each unit realizes multistage processing process integration, improves waste gas treatment efficiency and stability.And, each unit is integrated in box 100, equipment integrated design, save space, installation and maintenance are convenient. Control unit 170 is also provided in box 100, control unit 170 is electrically connected with fluorine removal unit 110, filtration unit 120, adsorption unit 130, catalytic oxidation unit 180, for monitoring the working state of each unit and adjusting the operating parameter of each unit, can flexibly adjust processing flow and parameter according to the composition and concentration of different waste gas. High degree of automation, reduce labor operation cost, ensure the continuity and reliability of waste gas treatment process. It needs to be explained that control unit 170 is mainly electric control cabinet, and electric control cabinet is installed in the inside of box 100.

[0029] Further, the air inlet end of the fluorine removal unit 110 is arranged close to the air inlet 101, and a space is left between the air inlet end of the fluorine removal unit 110 and the air inlet 101 for uniform air distribution. The space can provide a buffer space for the waste gas entering the air inlet 101, so that the air flow distribution and speed can be self-adjusted, and the waste gas can be evenly introduced into the fluorine removal unit 110. In some embodiments, the fluorine removal unit 110 includes a fluorine removal box 111 and a plurality of filler units 112, which are detachably connected to the fluorine removal box 111, and the filler units 112 are provided with fluorine removal fillers. The filler units 112 can be detached from the fluorine removal box 111, which facilitates the replacement of the fluorine removal fillers in the filler units 112 and improves the fluorine removal effect. Specifically, the filler units 112 adopt a drawer type structure and can be pulled out of the fluorine removal box 111. Of course, the filler units 112 can also adopt other structures that are convenient to disassemble, such as a rotating disassembly structure such as a threaded structure. The fluorine removal filler can adopt SDGII type acid gas adsorbent or alumina material for removing fluorides in the waste gas.

[0030] After the waste gas is treated by the fluorine removal unit 110, dust and LiPF6 crystals in the waste gas need to be removed for the next purification treatment. In some embodiments, the filter unit 120 is integrally connected to the air outlet end of the fluorine removal unit 110, which can improve the integration of the filter unit 120 and the fluorine removal unit 110, increase the sealing of the connection between the two, and reduce or even avoid waste gas leakage. The filter unit 120 is internally provided with a plate filter, and the plate filter is a F7 series, which has a large windward surface, so the dust amount is large and the wind speed is low, which is very suitable for application in integrated waste gas treatment equipment.

[0031] In addition to fluorides and dust, the waste gas of the lithium battery factory also contains volatile organic compounds. In order to eliminate the organic compounds in the waste gas, in some embodiments, the adsorption unit 130 is connected to the filter unit 120 through a stainless steel pipeline, and the filter unit 120 is internally provided with a rotating wheel, which includes a component made of adsorption material, specifically a zeolite molecular sieve, and the rotating wheel is connected to a driving mechanism and driven to rotate by the driving mechanism. The driving mechanism includes a motor and a belt, and the rotating wheel is connected to the motor through the belt, and the motor drives the rotating wheel to rotate.

[0032] The volatile organic matter adsorbed by the rotating wheel needs to be introduced into the catalytic oxidation unit 180 for reaction and elimination by desorption means. The catalytic oxidation unit 180 is connected to the adsorption unit 130 through a variable-diameter pipeline. The variable-diameter pipeline refers to a pipeline in which pipeline sections with different diameters are connected in sequence. The reliability of transportation is higher than that of a branched pipeline network, and transportation after a certain point will not be interrupted due to a fault at that point. The catalytic oxidation unit 180 includes a combustion furnace, and the combustion furnace is internally provided with a catalyst device containing a catalyst component for promoting the combustion of organic matter with oxygen in the combustion furnace. The organic matter is completely converted into carbon dioxide and water through combustion catalysis, meeting the environmental protection and safety standards for waste gas emission. The combustion furnace is a CO combustion furnace made of 304 stainless steel.

[0033] It can be understood that the desorption means is the reverse process of adsorption, i.e., desorption, and the organic matter adsorbed in the rotating wheel is blown into the catalytic oxidation unit 180 by hot air sweeping. Specifically, a heating and blowing device 140 is provided between the adsorption unit 130 and the catalytic oxidation unit 180. The heating and blowing device 140 is used to desorb the VOCs component in the waste gas and blow it into the catalytic oxidation unit 180. The heating and blowing device 140 is specifically a heating fan. The hot air generated by the heating fan blows off the organic matter and then is discharged into the catalytic oxidation unit 180 for further chemical treatment. Since the amount of air blown off is much smaller than the amount of waste gas during adsorption, the concentration of the organic matter blown off is very high, i.e., the organic matter is "concentrated".

[0034] The flow of waste gas in the box body 100 needs to be driven by power, so the box body 100 is provided with a negative pressure device 160. The negative pressure device 160 allows the waste gas to enter from the air inlet 101 and pass through the defluorination unit 110, the filtration unit 120, the adsorption unit 130, the catalytic oxidation unit 180, and the air outlet unit 150 in sequence before being discharged. The negative pressure device 160 is a main fan, which is arranged near the output end of the air outlet unit 150. The main fan rotates to generate negative pressure, allowing the waste gas to be collected from the workshop and discharged from the air outlet unit 150 after being treated by the entire device.

[0035] In addition, the box body 100 integrates various waste gas treatment units, and the units in the box body 100 need to be maintained in time. In some embodiments, the box body 100 is provided with several maintenance doors 190. When the maintenance doors 190 are closed, the box body 100 is sealed, and when the maintenance doors 190 are opened, the box body 100 is in communication with the outside. The maintenance doors 190 are hinged to the box body 100, and a sealing strip structure is installed at the connection position of the maintenance doors 190 and the box body 100, so that the box body 100 has good sealing performance when the maintenance doors 190 are closed. The maintenance doors 190 facilitate the entry and exit of maintenance personnel into the box body 100 and the maintenance of the waste gas treatment units inside the box body 100, and can maintain the normal operation of the waste gas treatment equipment.

[0036] In the description of the utility model, it is necessary to explain, the term "front", "back", "left", "right", "up", "down", "top", "bottom", "inner", "outer" and so on indicate the position relation or location relation is based on the position or location relation shown in the drawing, only is for the convenience of describing the utility model and simplifying the description, and is not indicate or imply that the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore can not be understood as the limitation of the utility model. In addition, the term "first", "second" is only for the purpose of description, and can not be understood as indicating or implying relative importance.

[0037] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "connection", "connect" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, can also be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] The protection scope of the utility model is only limited by the claims. Thanks to the teaching of the utility model, those skilled in the art can easily realize that the alternative structure of the disclosed structure of the utility model can be used as a feasible alternative embodiment, and the disclosed embodiments of the utility model can be combined to produce new embodiments, which also fall within the scope of the appended claims.

Claims

1. A lithium battery plant off-gas treatment apparatus comprising a cabinet (100); characterized by, The box (100) is provided with an air inlet (101) on one side, and is sequentially provided with a defluorination unit (110), a filtering unit (120), an adsorption unit (130), a catalytic oxidation unit (180) and an air outlet unit (150) inside along the gas flow direction, the air outlet unit (150) is connected with the box (100) for discharging the treated gas; the box (100) is further provided with a control unit (170), and the control unit (170) is electrically connected with the defluorination unit (110), the filtering unit (120), the adsorption unit (130) and the catalytic oxidation unit (180) for monitoring the working state of each unit and adjusting the operation parameters of each unit.

2. The lithium battery plant exhaust treatment apparatus according to claim 1, wherein The air inlet end of the defluorination unit (110) is arranged close to the air inlet (101), and part of space is left between the air inlet end of the defluorination unit (110) and the air inlet (101) for uniform air distribution.

3. A lithium battery plant off-gas treatment apparatus according to claim 2, characterized in that, The defluorination unit (110) comprises a defluorination box (111) and a plurality of filler units (112), the plurality of filler units (112) are detachably connected with the defluorination box (111), and the filler units (112) are provided with defluorination fillers.

4. The lithium battery plant exhaust treatment apparatus according to claim 1, wherein The filtering unit (120) is integrally connected with the air outlet end of the defluorination unit (110), and the filtering unit (120) is internally provided with a plate filter.

5. The lithium battery plant exhaust treatment apparatus according to claim 1, wherein The adsorption unit (130) is connected with the filtering unit (120) through a pipeline, the filtering unit (120) is internally provided with a rotating wheel, the rotating wheel comprises a component made of adsorption material, and the rotating wheel is connected with a driving mechanism and driven to rotate by the driving mechanism.

6. The lithium battery plant exhaust treatment apparatus according to claim 1, wherein The catalytic oxidation unit (180) comprises a combustion furnace, and the combustion furnace is internally provided with a catalyst device for promoting the combustion of organic matter and oxygen in the combustion furnace.

7. A lithium battery plant exhaust treatment apparatus according to claim 6, characterized in that, The catalytic oxidation unit (180) is connected with the adsorption unit (130) through a variable-diameter pipeline.

8. The lithium battery plant exhaust treatment apparatus according to claim 1, wherein, A heating blowing device (140) is arranged between the adsorption unit (130) and the catalytic oxidation unit (180), and the heating blowing device (140) is used for desorbing VOCs components in waste gas and blowing them into the catalytic oxidation unit (180).

9. The lithium battery plant exhaust treatment apparatus according to claim 1, wherein The box (100) is provided with a negative pressure device (160), and the negative pressure device (160) makes the waste gas enter from the air inlet (101) and sequentially pass through the defluorination unit (110), the filtering unit (120), the adsorption unit (130), the catalytic oxidation unit (180) and the air outlet unit (150) to be discharged.

10. The lithium battery plant exhaust treatment apparatus according to claim 1, wherein The box (100) is provided with a plurality of maintenance doors (190), the maintenance doors (190) seal the box (100) when closed, and the maintenance doors (190) make the box (100) communicate with the outside when opened.

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