A multi-stage exhaust port integrated exhaust treatment device

Abstract

The utility model discloses a kind of multistage exhaust port integrated waste gas treatment device, it is related to waste gas treatment equipment technical field.Its structure includes flue gas heat exchanger, waste gas buffer tank, RTO incinerator;Flue gas heat exchanger intake end is communicated with low waste intake pipeline, dust high waste intake pipeline and several high waste independent intake pipeline;Waste gas buffer tank is communicated with flue gas heat exchanger by tee pipe, and two branch pipes of tee pipe and waste gas buffer tank communication are respectively installed one booster pump.This utility model can comprehensively collect different sources waste gas in lithium battery recycling, recycle heat energy by flue gas heat exchanger, utilize waste gas buffer tank stable delivery;Burn by RTO incinerator, cooperate lye spraying, bag dust removal and activated carbon adsorption multistage purification, depth treatment harmful substance;Each pipeline design is flexible, adapt to different needs, ensure efficient stable operation, significantly improve emission gas quality.

Description

Technical Field

[0001] This utility model belongs to the technical field of waste gas treatment equipment, and in particular relates to a multi-stage exhaust port integrated waste gas treatment device. Background Technology

[0002] In the field of lithium battery recycling and reuse, with the rapid development of electric vehicles and energy storage systems, both the production and disposal volumes of lithium batteries are showing a rapid growth trend. During the lithium battery recycling process, the dismantling, pyrolysis, drying, and sorting processes generate a large amount of waste gas containing dust, harmful gases, and volatile organic compounds (VOCs). If this waste gas is emitted directly without effective treatment, it will cause serious environmental pollution and harm human health.

[0003] Currently, although various waste gas treatment technologies exist in the market, existing technologies often struggle to achieve comprehensive and efficient collection and treatment of waste gases and dust generated in multiple environments and pipelines during lithium battery recycling. Some technologies focus only on treating waste gases from a single source, ignoring the differences in the characteristics of waste gases generated at different process stages; while other technologies are difficult to promote in practical applications due to complex treatment processes, high costs, or unstable treatment effects.

[0004] Therefore, developing a specialized treatment device for multi-stage exhaust gas and dust generated during lithium battery recycling, enabling multi-pipeline collection, unified treatment, and heat recovery, has become an urgent technical problem to be solved in the field of exhaust gas treatment.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the general background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a multi-stage exhaust port integrated waste gas treatment device. It collects different waste gases from lithium battery recovery in separate channels, recovers heat energy through a flue gas heat exchanger, and stably delivers the waste gas to an RTO incinerator for combustion using a waste gas buffer tank. Combined with alkaline spraying, bag filter dust collection, and activated carbon adsorption for multi-stage purification, it solves the problems of existing technologies that are difficult to comprehensively and efficiently treat waste gases from multiple sources, lack of heat energy recovery, and unstable treatment, thereby improving emission quality.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a multi-stage exhaust port integrated waste gas treatment device, comprising a flue gas heat exchanger, a waste gas buffer tank, and an RTO incinerator; the inlet end of the flue gas heat exchanger is connected to a low waste volume inlet pipe, a dust-generating high waste volume inlet pipe, and several independent high waste volume inlet pipes; the waste gas buffer tank is connected to the flue gas heat exchanger via a T-junction, and a booster pump is installed on each of the two branch pipes connecting the T-junction to the waste gas buffer tank; a first one-way valve is installed on the branch pipe connecting the T-junction to the flue gas heat exchanger; the waste gas inlet end of the RTO incinerator is connected to the waste gas buffer tank via a waste gas delivery pipe; an automatic regulating valve is installed on the waste gas delivery pipe.

[0008] As a preferred embodiment of this utility model, a first cyclone dust collector is installed on the waste gas conveying pipeline located between the automatic regulating valve and the waste gas buffer tank.

[0009] As a preferred embodiment of this utility model, an overflow discharge pipeline is installed between the waste gas buffer tank and the waste gas conveying pipeline, and the overflow discharge pipeline is connected between the automatic regulating valve and the RTO incinerator; a pressure relief valve is installed on the overflow discharge pipeline.

[0010] As a preferred embodiment of this utility model, the low-waste inlet pipeline includes a low-waste main pipeline; the low-waste main pipeline is connected to several low-waste conveying branch pipelines; a first gas collection hood is installed at the lower end of each low-waste conveying branch pipeline; a second one-way valve and a first axial flow fan are installed on each low-waste conveying branch pipeline. The low-waste inlet pipeline is mainly used to collect the waste gas overflowing and emitted during the lithium battery recycling process. The first gas collection hood completely covers the top of the conveyor belt, and the entire system converges and conveys the waste gas to the flue gas heat exchanger.

[0011] As a preferred embodiment of this utility model, the high-waste-capacity independent air inlet pipeline is equipped with a third one-way valve and a second axial flow fan. The high-waste-capacity independent air inlet pipeline is directly connected to lithium battery recycling equipment such as high-temperature pyrolysis machines and dryers, directly extracting the waste gas overflowing from pyrolysis and transporting it to the flue gas heat exchanger via an independent pipeline.

[0012] As a preferred embodiment of this invention, a fourth one-way valve and a third axial flow fan are installed on the high-volume dust and waste gas inlet pipe; a second gas collection hood is installed at the lower end of the high-volume dust and waste gas inlet pipe. The high-volume dust and waste gas inlet pipe is mainly for the recovery of dust and waste gas generated during the sorting process of the separator.

[0013] In a preferred embodiment of this invention, the exhaust end of the RTO incinerator is connected to an alkaline spray tower via a first waste gas pipeline. The tower primarily absorbs acidic gases such as HF and SO2 using sodium hydroxide solution.

[0014] In a preferred embodiment of this invention, the exhaust end of the alkaline spray tower is connected to a bag filter via a second waste gas pipeline. This filter intercepts residual dust after incineration, achieving a filtration efficiency of over 99%.

[0015] In a preferred embodiment of this invention, the exhaust end of the baghouse dust collector is connected to an activated carbon adsorption filter via a third waste gas pipeline. This filter is used for adsorption and purification of low-concentration VOCs or odorous substances.

[0016] This utility model has the following beneficial effects: This utility model achieves comprehensive collection of waste gas from different sources and volumes through the design of a low-waste-volume inlet pipe, a dust-generating high-waste-volume inlet pipe, and several independent high-waste-volume inlet pipes, ensuring the comprehensiveness and efficiency of waste gas treatment.

[0017] This invention improves energy efficiency and reduces treatment costs by using a flue gas heat exchanger to cool the waste gas and recover some of the heat energy.

[0018] This invention ensures stable delivery of exhaust gas by using a waste gas buffer tank in conjunction with a booster pump. Simultaneously, the inclusion of an overflow discharge pipeline and a pressure relief valve effectively prevents excessive pressure within the system, guaranteeing safe system operation.

[0019] This invention utilizes an RTO incinerator for combustion treatment, combined with a multi-stage purification system consisting of an alkaline spray tower, a bag filter, and an activated carbon adsorption filter, to achieve deep treatment of acidic gases, dust, and low-concentration VOCs or odorous substances in the exhaust gas, resulting in a significant improvement in the quality of the emitted gas.

[0020] This invention, through the design of one-way valves and axial flow fans on each air intake pipe, enables the system to flexibly adapt to the needs of different exhaust gas generation points, ensuring efficient collection and transportation of exhaust gas. Simultaneously, the inclusion of automatic regulating valves further improves the system's operational efficiency and stability.

[0021] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the implementation of the multi-stage exhaust port integrated waste gas treatment device of this utility model.

[0024] The attached diagram lists the components represented by each number as follows: 1-Flue gas heat exchanger, 2-Waste gas buffer tank, 3-RTO incinerator, 4-Low waste gas inlet pipe, 5-High waste gas independent inlet pipe, 6-Dust-generating high waste gas inlet pipe, 7-Booster pump, 8-Waste gas conveying pipe, 9-Automatic regulating valve, 10-First cyclone dust collector, 11-Overflow discharge pipe, 12-Pressure relief valve, 13-T-connector, 14-First check valve, 15-Alkali spray tower, 16-Bag filter, 17-Activated carbon adsorption filter, 41-Low waste gas main pipe, 42-Low waste gas conveying branch pipe, 43-First gas collection hood, 44-Second check valve, 45-First axial flow fan, 51-Third check valve, 52-Second axial flow fan, 61-Fourth check valve, 62-Third axial flow fan, 63-Second gas collection hood. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Specific Implementation Example 1: Please see Figure 1 As shown, this utility model is a multi-stage exhaust port integrated waste gas treatment device, specifically designed for the various environmental waste gases and dust generated during lithium battery recycling, realizing multi-pipeline separate collection, unified treatment, and heat energy recovery. The device mainly includes a flue gas heat exchanger 1, a waste gas buffer tank 2, an RTO incinerator 3, and a series of auxiliary equipment and piping systems.

[0027] Flue gas heat exchanger 1: As the first station for waste gas treatment, its inlet end is connected to a low waste gas inlet pipe 4, a dust-generating high waste gas inlet pipe 6, and several independent high waste gas inlet pipes 5. These pipes are responsible for collecting gases from different sources and in different quantities, ensuring comprehensive coverage of all waste gas generation points in the lithium battery recycling process.

[0028] Waste gas buffer tank 2: It is connected to the flue gas heat exchanger 1 via a three-way pipe 13. A booster pump 7 is installed on each of the two branch pipes connecting the three-way pipe 13 and the waste gas buffer tank 2 to provide a stable waste gas delivery pressure. At the same time, a first one-way valve 14 is installed on the branch pipe connecting the three-way pipe 13 and the flue gas heat exchanger 1 to prevent waste gas backflow.

[0029] RTO incinerator 3: Its exhaust gas inlet is connected to the exhaust gas buffer tank 2 via an exhaust gas delivery pipe 8. An automatic regulating valve 9 is installed on the exhaust gas delivery pipe 8 to automatically adjust the exhaust gas flow rate according to the processing capacity of the RTO incinerator 3. In addition, a first cyclone dust collector 10 is also installed on the exhaust gas delivery pipe 8 located between the automatic regulating valve 9 and the exhaust gas buffer tank 2 to initially remove large particulate dust from the exhaust gas.

[0030] Overflow discharge pipeline 11: An overflow discharge pipeline 11 is also installed between the waste gas buffer tank 2 and the waste gas delivery pipeline 8. This pipeline connects the automatic regulating valve 9 and the RTO incinerator 3, and is equipped with a pressure relief valve 12. When the pressure inside the waste gas buffer tank 2 is too high, the pressure relief valve 12 automatically opens, and the excess waste gas is discharged through the overflow discharge pipeline 11 to ensure the safe operation of the system.

[0031] Low-waste intake pipe 4: includes a low-waste main pipe 41 and several low-waste conveying branch pipes 42. A first gas collection hood 43 is installed at the lower end of each low-waste conveying branch pipe 42, completely covering the lithium battery recycling conveyor belt to comprehensively collect the waste gas overflowing during the conveying process. A second one-way valve 44 and a first axial flow fan 45 are also installed on the low-waste conveying branch pipe 42 to ensure unidirectional flow of waste gas and accelerate its conveying.

[0032] High-volume independent inlet pipe 5: Directly connected to lithium battery recycling equipment such as high-temperature pyrolysis machines and dryers, it directly extracts the waste gas overflowing from pyrolysis through an independent pipeline. The high-volume independent inlet pipe 5 is equipped with a third one-way valve 51 and a second axial flow fan 52 to ensure that the waste gas is efficiently and stably delivered to the flue gas heat exchanger 1.

[0033] Dust and waste gas inlet pipe 6: This pipe is used to recover dust and waste gas generated during the sorting process of the separator. It is equipped with a fourth one-way valve 61 and a third axial flow fan 62, and a second gas collection hood 63 at the lower end, which effectively covers the sorting area and ensures that dust and waste gas are fully collected.

[0034] The exhaust end of the RTO incinerator 3 is connected to an alkaline spray tower 15 through the first waste gas pipeline. The sodium hydroxide solution is used to absorb acidic gases such as HF and SO2 generated during the incineration process, thereby reducing the emission of harmful gases.

[0035] The exhaust end of the alkaline spray tower 15 is connected to a bag filter 16 through a second waste gas pipeline to intercept the dust remaining after incineration. The filtration efficiency is over 99%, ensuring the cleanliness of the emitted gas.

[0036] The exhaust end of the bag filter 16 is connected to an activated carbon adsorption filter 17 through a third waste gas pipeline. This filter adsorbs and purifies low-concentration VOCs or odorous substances, further improving the quality of the emitted gas.

[0037] This embodiment of the multi-stage exhaust gas integrated treatment device achieves specialized treatment of multi-stage exhaust gas and dust during lithium battery recycling through separate collection, unified cooling and heat recovery, stable transportation, and efficient combustion. The system operates stably and reliably, with significant treatment effects, effectively reducing the environmental impact of exhaust gas emissions and meeting environmental protection requirements.

[0038] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-stage exhaust port integrated waste gas treatment device, characterized in that: Includes flue gas heat exchanger (1), waste gas buffer tank (2), and RTO incinerator (3); The flue gas heat exchanger (1) is connected to a low waste volume inlet pipe (4), a dust-generating high waste volume inlet pipe (6), and several high waste volume independent inlet pipes (5) at its inlet end. The waste gas buffer tank (2) is connected to the flue gas heat exchanger (1) through a three-way pipe (13), and a booster pump (7) is installed on each of the two branch pipes connected to the waste gas buffer tank (2) by the three-way pipe (13); a first one-way valve (14) is installed on the branch pipe connected to the flue gas heat exchanger (1). The exhaust gas inlet of the RTO incinerator (3) is connected to the exhaust gas buffer tank (2) via an exhaust gas conveying pipe (8); an automatic regulating valve (9) is installed on the exhaust gas conveying pipe (8).

2. The multi-stage exhaust port integrated waste gas treatment device according to claim 1, characterized in that, A first cyclone dust collector (10) is installed on the waste gas conveying pipeline (8) located between the automatic regulating valve (9) and the waste gas buffer tank (2).

3. The multi-stage exhaust port integrated waste gas treatment device according to claim 2, characterized in that, An overflow discharge pipe (11) is installed between the waste gas buffer tank (2) and the waste gas conveying pipe (8), and the overflow discharge pipe (11) is connected between the automatic regulating valve (9) and the RTO incinerator (3); a pressure relief valve (12) is installed on the overflow discharge pipe (11).

4. The multi-stage exhaust port integrated waste gas treatment device according to claim 1, characterized in that, The low-waste intake pipeline (4) includes a low-waste main pipeline (41); the low-waste main pipeline (41) is connected to a number of low-waste conveying branch pipelines (42); a first gas collection hood (43) is installed at the lower end of the low-waste conveying branch pipeline (42); a second one-way valve (44) and a first axial flow fan (45) are installed on the low-waste conveying branch pipeline (42).

5. The multi-stage exhaust port integrated waste gas treatment device according to claim 1, characterized in that, The high waste volume independent air intake pipe (5) is equipped with a third one-way valve (51) and a second axial flow fan (52).

6. The multi-stage exhaust port integrated waste gas treatment device according to claim 1, characterized in that, The high-volume dust inlet pipe (6) is equipped with a fourth one-way valve (61) and a third axial flow fan (62); a second gas collection hood (63) is installed at the lower end of the high-volume dust inlet pipe (6).

7. The multi-stage exhaust port integrated waste gas treatment device according to claim 1, characterized in that, The exhaust end of the RTO incinerator (3) is connected to an alkaline spray tower (15) through a first waste gas pipeline.

8. The multi-stage exhaust port integrated waste gas treatment device according to claim 7, characterized in that, The exhaust end of the alkaline spray tower (15) is connected to a bag filter (16) through a second waste gas pipeline.

9. The multi-stage exhaust port integrated waste gas treatment device according to claim 8, characterized in that, The exhaust end of the bag filter (16) is connected to an activated carbon adsorption filter (17) through a third waste gas pipeline.

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