Organic waste gas treatment system

Abstract

The utility model belongs to the technical field of waste gas treatment, and particularly relates to an organic waste gas treatment system. Comprising a spraying pool, a plasma degreaser, an activated carbon adsorption module and a spraying gasification tower which are sequentially connected through a pipeline, a gas-water separation device is connected between the spraying pool and the plasma degreaser, and a centrifugal fan is connected in the pipeline between the activated carbon adsorption module and the spraying gasification tower. According to the organic waste gas treatment system, all the equipment is reasonably connected and arranged, so that the comprehensive treatment of organic waste gas generated in each working section in the PCB production process can be safely completed, the standard reaching and odor-free emission are realized, and the comprehensive operation cost is lower in the organic waste gas treatment system capable of achieving the same treatment effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste gas treatment, and specifically relates to an organic waste gas treatment system. Background Art

[0002] A large amount of organic materials such as ink and screen washing water are needed in the PCB manufacturing process. During the printing, screen washing, baking and other processes, some organic materials volatilize into organic waste gas, which needs to be treated to meet the standards before being discharged. The organic waste gas generated by all the above processes includes volatile organic solvents, some synthetic intermediates with unclear composition, and smoke generated during the baking process. Due to the many processes involved, the composition of organic waste gas is complex and unclear, but the toxicity and odor are relatively obvious, making it difficult to treat.

[0003] Common methods for treating organic waste gas in the prior art include spraying, adsorption, etc., which usually need to be used in combination. Plasma purification and oil removal technology is already available in the prior art, which is excellent in removing odors. The principle is to use plasma technology to decompose organic matter into harmless substances. It has a good treatment effect on a variety of organic matter, and good treatment results can be achieved without determining the waste gas components. However, since the main components of organic waste gas generated during the PCB manufacturing process are flammable and explosive chemicals, it is not suitable to use a plasma degreasing device alone for treatment. This is because the principle of the plasma purifier involves discharge. When the concentration of volatile organic matter in the waste gas is too high and reaches the explosion limit, the electrode discharge will cause an explosion. Utility Model Content

[0004] In order to solve the above technical problems, it is necessary to provide a safe organic waste gas treatment system with good deodorization effect.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] An organic waste gas treatment system comprises a spray pool, a plasma deoiler, an activated carbon adsorption module, and a spray gasification tower which are sequentially connected through pipelines; a gas-water separation device is connected between the spray pool and the plasma deoiler; a centrifugal fan is connected in the pipeline between the activated carbon adsorption module and the spray gasification tower.

[0007] In the organic waste gas treatment system provided by the utility model, most of the solids in the waste gas are first removed through the spray pool to prevent the dust mixture from reaching the explosion limit and reduce the content of flammable and explosive components in the waste gas. The waste gas coming out of the spray pool contains water vapor. When the waste gas contains a large amount of water, it passes through the plasma deoiler, which may cause the plasma deoiler to short-circuit, posing a safety hazard. Excessive water will also affect the stability of the plasma, thereby affecting the efficiency of oil removal. If the water enters the activated carbon adsorption module through the plasma deoiler, the pore structure of the activated carbon may be occupied by water, which will reduce the surface area available for adsorption and cause the adsorption effect to deteriorate. Therefore, a gas-water separation device is set before the plasma deoiler to remove water. The spray gasification tower has a strong purification capacity but a high maintenance cost. It is set at the end. After passing through the plasma deoiler and the activated carbon adsorption module, the air flow velocity is low. In order to meet the wind speed requirements of the spray gasification tower, a centrifugal fan is set between the activated carbon adsorption module and the spray gasification tower. Through the reasonable connection and setting of all the above-mentioned equipment, the treatment of organic waste gas can be completed, and the emission can meet the standards and be odor-free. The comprehensive treatment effect of organic waste gas generated in the PCB manufacturing process is good. In the organic waste gas treatment system that can achieve the same treatment effect, the operating cost is also low.

[0008] Preferably, an electrostatic deoiler is connected between the gas-water separation device and the plasma deoiler. Electrostatic deoiling and plasma deoiling are often used in combination.

[0009] Preferably, an organic volatiles monitoring device is also provided between the electrostatic degreaser and the plasma degreaser. Since the plasma degreaser uses high voltage discharge to treat waste gas, the concentration of organic volatiles needs to be controlled to avoid fire and explosion accidents. The organic volatiles monitoring device is equipped to alarm when the organic waste gas content is too high.

[0010] Preferably, the volatile organic matter monitoring device is communicatively connected with an electronic valve, which is used to control the opening and closing of the gas circuit and is arranged on the pipeline between the volatile organic matter monitoring device and the plasma degreaser. When the volatile organic matter monitoring device detects that the concentration of volatile organic matter is higher than a preset upper limit, a closing signal is sent to the electronic valve. One of the causes of safety accidents is the leakage of organic solvents. When the concentration of volatile organic matter is higher than 2000mg / m 3 When the airflow enters the plasma degreaser, it may cause an explosion. Timely intervention through electronic valves can cut off the airflow path and further improve safety.

[0011] Preferably, the pipeline between the electrostatic oil remover and the electronic valve is connected to an air storage bin. When the electronic valve is closed, the exhaust gas is blocked by the electronic valve and enters the air storage bin for temporary storage.

[0012] Preferably, the activated carbon adsorption module is equipped with an activated carbon desorption and regeneration device. Activated carbon adsorption is a relatively important processing link. In order to ensure the normal and stable operation of the activated carbon adsorption module, it is not only necessary to prevent water vapor from entering the activated carbon adsorption module, but also necessary to equip it with an activated carbon desorption and regeneration device to extend its service life. Otherwise, the activated carbon needs to be replaced frequently, which is costly.

[0013] Preferably, the activated carbon desorption and regeneration device comprises a catalytic combustion chamber. The activated carbon desorption and regeneration process also discharges gaseous pollutants, which are treated by catalytic combustion to avoid secondary pollution.

[0014] Preferably, the activated carbon in the activated carbon adsorption module is honeycomb activated carbon, which has a large specific surface area, strong adsorption capacity and low fluid resistance.

[0015] Preferably, the gas-water separation device is a wire mesh gas-water separator. It has been verified that the performance of the wire mesh gas-water separator is relatively good and the cost is reasonable.

[0016] Preferably, the mesh pore size of the wire mesh type gas-water separator is 5 μm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other purposes, features and advantages of the present invention will become more apparent through a more specific description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals in all the accompanying drawings indicate the same parts, and the drawings are not intentionally scaled to the actual size, but the focus is on illustrating the subject matter of the present invention.

[0018] Figure 1 It is a structural schematic diagram of a preferred embodiment;

[0019] In the figure: a spray pool 1, a gas-water separation device 2, a plasma deoiler 3, an activated carbon adsorption module 4, a centrifugal fan 5, a spray gasification tower 6, an electrostatic deoiler 7, an organic volatile monitoring device 8, and an activated carbon desorption regeneration device 9. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0021] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element and combined with it as a whole, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used in this article are only for the purpose of illustrating the present utility model.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art. The terms used in the specification herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] refer to Figure 1 The organic waste gas treatment system described in the utility model includes a spray pool 1, a plasma deoiler 3, an activated carbon adsorption module 4, and a spray gasification tower 6 which are sequentially connected through pipelines. A gas-water separation device 2 is connected between the spray pool 1 and the plasma deoiler 3, and a centrifugal fan 5 is connected in the pipeline between the activated carbon adsorption module 4 and the spray gasification tower 6.

[0024] In a preferred embodiment, an electrostatic degreasing device 7 is further connected between the gas-water separation device 2 and the plasma degreasing device 3. Electrostatic degreasing and plasma degreasing are often used in combination.

[0025] In a preferred embodiment, an organic volatile monitoring device 8 is further provided between the electrostatic degreaser 7 and the plasma degreaser 3. Since the plasma degreaser 3 uses high voltage discharge to treat the waste gas, it is necessary to control the concentration of organic volatiles to avoid fire and explosion accidents. The organic volatile monitoring device 8 is equipped to alarm when the organic waste gas content is too high.

[0026] In a preferred embodiment, the volatile organic matter monitoring device 8 is communicatively connected to an electronic valve, which is used to control the opening and closing of the gas circuit and is arranged on the pipeline between the volatile organic matter monitoring device 8 and the plasma degreasing device 7. When the volatile organic matter monitoring device 8 detects that the concentration of volatile organic matter is higher than the preset upper limit, a closing signal is sent to the electronic valve. Since the electronic valve immediately performs the closing action after receiving the closing signal, the preset upper limit can be set higher to reduce the probability of false alarms. In a preferred embodiment, the preset upper limit is 800 mg / m 3 , preferably set at 300mg / m 3 and 1200 mg / m 3 between.

[0027] In a preferred embodiment, the pipeline between the electrostatic oil remover 7 and the electronic valve is connected to an air storage bin. When the electronic valve is closed, the exhaust gas is blocked by the electronic valve and enters the air storage bin for temporary storage.

[0028] In a preferred embodiment, the activated carbon adsorption module 4 is equipped with an activated carbon desorption regeneration device 9. Activated carbon adsorption is a relatively important processing link. In order to ensure that the activated carbon adsorption module 4 can operate normally and stably, it is not only necessary to prevent water vapor from entering the activated carbon adsorption module 4, but also necessary to be equipped with an activated carbon desorption regeneration device 9 to extend its service life. Otherwise, the activated carbon needs to be replaced frequently, which is costly.

[0029] In a preferred embodiment, the activated carbon desorption and regeneration device 9 includes a catalytic combustion chamber. The activated carbon desorption and regeneration process also discharges gaseous pollutants, which are treated by catalytic combustion to avoid secondary pollution. To ensure safety, the activated carbon desorption and regeneration process in the preferred embodiment needs to be carried out separately, and the activated carbon desorption and regeneration device 9 is started again when the organic waste gas treatment system is shut down to desorb the activated carbon and treat the pollution.

[0030] In a preferred embodiment, the activated carbon in the activated carbon adsorption module 4 is honeycomb activated carbon. Honeycomb activated carbon has a large specific surface area, strong adsorption capacity, and low fluid resistance.

[0031] In a preferred embodiment, the gas-water separation device 2 is a wire mesh gas-water separator. It has been verified that the wire mesh gas-water separator has a better performance, a large flow rate and a reasonable cost.

[0032] In a preferred embodiment, the mesh pore size of the wire mesh type gas-water separator is 5 μm.

[0033] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "other embodiments" or "specific example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0035] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An organic waste gas treatment system, characterized in that: The invention comprises a spray pool (1), a plasma deoiler (3), an activated carbon adsorption module (4), and a spray gasification tower (6) which are sequentially connected via pipelines; a gas-water separation device (2) is connected between the spray pool (1) and the plasma deoiler (3); a centrifugal fan (5) is connected in the pipeline between the activated carbon adsorption module (4) and the spray gasification tower (6); an electrostatic deoiler (7) is further connected between the gas-water separation device (2) and the plasma deoiler (3); and an organic volatile matter monitoring device (8) is further arranged between the electrostatic deoiler (7) and the plasma deoiler (3).

2. The organic waste gas treatment system according to claim 1, characterized in that: The volatile organic matter monitoring device (8) is communicatively connected to an electronic valve, the electronic valve being used to control the opening and closing of a gas circuit and being arranged on a pipeline between the volatile organic matter monitoring device (8) and the plasma degreaser (3), and sending a closing signal to the electronic valve when the volatile organic matter monitoring device (8) detects that the concentration of volatile organic matter is higher than a preset upper limit.

3. The organic waste gas treatment system according to claim 2, characterized in that: The pipeline between the electrostatic oil remover (7) and the electronic valve is connected to a gas storage bin. When the electronic valve is closed, the waste gas is blocked by the electronic valve and enters the gas storage bin for temporary storage.

4. An organic waste gas treatment system according to any one of claims 1 to 3, characterized in that: The activated carbon adsorption module (4) is equipped with an activated carbon desorption and regeneration device (9).

5. The organic waste gas treatment system according to claim 4, characterized in that: The activated carbon desorption and regeneration device (9) comprises a catalytic combustion chamber.

6. An organic waste gas treatment system according to any one of claims 1 to 3, characterized in that: The activated carbon in the activated carbon adsorption module (4) is honeycomb activated carbon.

7. An organic waste gas treatment system according to any one of claims 1 to 3, characterized in that: The gas-water separation device (2) is a wire mesh type gas-water separator.

8. The organic waste gas treatment system according to claim 7, characterized in that: The mesh aperture of the mesh type gas-water separator is 5 μm.

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