A purification device for removing particulate matters and vocs in exhaust gas

Abstract

The utility model discloses a kind of purification equipment for removing particulate matter and vocs in waste gas, it is related to waste gas treatment technical field, to solve the problems of existing activated carbon adsorption box prefilter easy to block, frequently replaced, difficult to operate and maintain, not applicable to high concentration particulate matter waste gas.The equipment includes box, the side of box is equipped with air inlet, the other side is equipped with air outlet, and activated carbon adsorber is loaded in the box;First baffle, second baffle and filter are sequentially loaded between air inlet and activated carbon adsorber along waste gas flow direction, first waste gas overflow port is left in the upper portion of first baffle, and second waste gas overflow port with filter screen is equipped in the lower portion of second baffle;First, second particulate matter receiving container is loaded in the corresponding area of box bottom, and particulate matter guide plate is equipped above container, and box is also equipped with multiple maintenance doors and industrial control display screen.The equipment forms three-stage filtration through baffle, filter screen and filter, separates large particles first and collects, reduces filter load, realizes stable operation, and reduces operation and maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically a purification device for removing particulate matter and VOCs from waste gas. Background Technology

[0002] With the expansion of industrial production and increasingly stringent environmental protection requirements, the purification and treatment of large-volume, low-concentration waste gases, such as those emitted from the chemical, spraying, and printing industries, has become a crucial aspect of compliant operation for enterprises. Driven by this demand, activated carbon adsorption boxes have gradually become the mainstream equipment for treating this type of waste gas due to their advantages such as high adsorption efficiency, relatively controllable cost, and ease of operation, and are widely used in various industrial sectors and environmental governance projects.

[0003] However, a major drawback of activated carbon adsorption materials is their extreme sensitivity to particulate matter in waste gas. If particulate matter enters the adsorption chamber with the waste gas, it will adhere to the surface of the activated carbon, clogging the pores and directly causing a sharp drop in adsorption capacity and a shortened service life. In severe cases, it can also lead to uneven airflow distribution and localized overheating, significantly increasing maintenance costs and safety risks. Therefore, the industry has generally adopted the standard configuration logic that "activated carbon adsorption chambers must be equipped with particulate matter pretreatment devices" to ensure the stable operation of the adsorption system.

[0004] Currently, the standard particulate matter pretreatment device for activated carbon adsorption boxes on the market is mainly a bag filter. This type of filter relies on the physical interception of the filter bag, achieving high removal efficiency for fine particulate matter and meeting pretreatment requirements in low-concentration particulate matter exhaust gas scenarios. However, when facing high-concentration particulate matter conditions such as exhaust gas from building materials processing, machinery manufacturing, and mining industries, the limitations of bag filters quickly become apparent: the filter bags are easily clogged by large amounts of particulate matter, requiring frequent shutdowns for filter bag replacement. This not only interrupts the production process but also increases the cost of consumables and manual maintenance. Furthermore, frequent disassembly and assembly increase the risk of equipment seal failure and dust leakage, making it difficult to meet the actual needs of "continuous and stable operation with low maintenance load" in high-concentration particulate matter exhaust gas treatment scenarios. This has become a key bottleneck restricting the applicability of activated carbon adsorption boxes. Therefore, there is an urgent need for a purification device that can operate stably in high-concentration particulate matter exhaust gas treatment scenarios without frequent filter replacements. Utility Model Content

[0005] The purpose of this utility model is to provide a purification device for removing particulate matter and VOCs from exhaust gas, aiming to solve the problems of existing filters being prone to clogging, requiring frequent replacement, and being difficult to maintain in the later stages, and not being suitable for exhaust gas treatment scenarios with high particulate matter concentrations.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A purification device for removing particulate matter and VOCs from exhaust gas includes a housing. An air inlet is located on one side of the housing, and an air outlet is located on the opposite side. An activated carbon adsorber is installed inside the housing. A first baffle, a second baffle, and a filter are sequentially installed between the air inlet and the activated carbon adsorber along the exhaust gas flow direction. A first exhaust gas outlet is provided between the upper part of the first baffle and the inner wall of the housing, and a second exhaust gas outlet is provided at the lower part of the second baffle. A filter screen is installed at the second exhaust gas outlet.

[0007] Preferably, it further includes a first particulate matter receiving container and a second particulate matter receiving container. The first particulate matter receiving container is installed at the bottom of the box between the side of the box having the air inlet and the first baffle, and the second particulate matter receiving container is installed at the bottom of the box between the first baffle and the second baffle.

[0008] Preferably, particulate guide plates are also installed on the upper sides of the first particulate receiving container and the second particulate receiving container, and the guide surfaces of the particulate guide plates are inclined to the particulate receiving containers.

[0009] Preferably, the filter is a bag filter.

[0010] Preferably, multiple access doors are provided on the housing.

[0011] Preferably, the housing has three access doors, which correspond to the areas of the first and second baffles, the filter area, and the activated carbon adsorber area, respectively.

[0012] Preferably, an industrial control display screen is also installed on the enclosure.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This application, by sequentially installing a first baffle, a second baffle, and a filter screen inside the housing, can form a three-stage filtration system in conjunction with a filter. When exhaust gas enters the housing from the air inlet, because the relative positions of the air inlet, the first exhaust gas outlet, and the second exhaust gas outlet are offset, the particulate matter in the exhaust gas will first collide with the first and second baffles. Under inertia, larger particles in the exhaust gas will fall into the particle receiving container in the corresponding area, thus separating large particles (D > 10 nm) from the exhaust gas for the first stage of filtration. When the exhaust gas passes through the second exhaust gas outlet, it passes through the filter screen, and the remaining particulate matter in the exhaust gas will collide with the filter screen. This process retains some particulate matter in the filter screen for secondary filtration. After passing through the filter screen, the exhaust gas continues to pass through a third filter, which intercepts fine particles in the exhaust gas. By setting up a primary and secondary filtration structure, this application can separate and recover some large particulate matter (D>10nm) in the exhaust gas. This not only effectively reduces the particulate matter content in the exhaust gas but also significantly reduces the filtration load of subsequent filters, slowing down their clogging and replacement. It effectively solves the problems of easy clogging, high replacement frequency, difficult maintenance, and unsuitability for exhaust gas treatment scenarios with high particulate matter concentrations that are common when using only a single filter in the prior art.

[0014] 2. This application collects the filtered exhaust gas particles in the corresponding area by installing a particulate matter receiving container at the bottom of the box, which facilitates subsequent particulate matter recycling. At the same time, this application also equips the particulate matter receiving container with a particulate matter guide plate to accurately guide all the filtered particles into the particulate matter receiving container, preventing them from falling into the gaps on both sides of the container and remaining in the box, which would be difficult to clean. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 A cross-sectional view of a purification device for removing particulate matter and VOCs from exhaust gas; Figure 2 This is a rear view of a purification device for removing particulate matter and VOCs from exhaust gas.

[0016] Icons: 1 Air inlet, 2 First baffle, 3 Second baffle, 4 Filter, 5 First exhaust gas outlet, 6 Second exhaust gas outlet, 7 First particulate matter receiving container, 8 Second particulate matter receiving container, 9 Particulate matter guide plate, 10 Air outlet, 11 Inspection door, 12 Industrial control display screen. Detailed Implementation

[0017] 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 protection scope of the present utility model.

[0018] Example 1 like Figure 1 The purification device shown includes a housing for removing particulate matter and VOCs from exhaust gas. In this embodiment, the housing is rectangular and made of cold-rolled steel plate. An air inlet 1 is provided on one side of the housing, and an air outlet 10 is provided on the other side opposite to the air inlet 1. An activated carbon adsorber is installed inside the housing. The activated carbon adsorber is used to adsorb volatile organic compounds (VOCs) in the exhaust gas. Since the activated carbon adsorber is a conventional purification device for exhaust gas treatment in this field, its specific structure will not be described in detail here.

[0019] The core of this embodiment is that a first baffle 2, a second baffle 3, and a filter 4 are sequentially installed between the air inlet 1 and the activated carbon adsorber along the direction of exhaust gas flow. A first exhaust gas outlet 5 is provided between the upper part of the first baffle 2 and the inner wall of the box. The relative positions of the first exhaust gas outlet 5 and the air inlet 1 are staggered. A second exhaust gas outlet 6 is provided at the lower part of the second baffle 3. The relative positions of the second exhaust gas outlet 6 and the first exhaust gas outlet 5 are staggered. A filter screen is installed at the second exhaust gas outlet 6.

[0020] In this embodiment, the filter 4 is a bag filter 4, which includes a fixed bracket and a filter bag. The fixed bracket is sealed and installed along the inner wall of the box, and the filter bag is installed on the fixed bracket for the exhaust gas to flow through, thereby intercepting solid particles in the exhaust gas. The filter screen is made of metal material, such as aluminum or stainless steel. Furthermore, a first particulate matter receiving container 7 is installed at the bottom of the box between the side of the box with the air inlet 1 and the first baffle 2, and a second particulate matter receiving container 8 is installed at the bottom of the box between the first baffle 2 and the second baffle 3. The first particulate matter receiving container 7 and the second particulate matter receiving container 8 are used to collect solid particulate matter intercepted by the first baffle 2, the second baffle 3 and the filter screen.

[0021] The working principle of the purification equipment in this embodiment is as follows: First, exhaust gas enters the housing through the air inlet 1. Since the relative positions of the air inlet 1, the first exhaust gas outlet 5, and the second exhaust gas outlet 6 are staggered, during the exhaust gas flow, the particulate matter contained therein will first collide with the first baffle 2 and the second baffle 3. Under inertia, large particles in the exhaust gas will fall into the particulate matter receiving container in the corresponding area, thereby separating large particles (D>10nm) from the exhaust gas. This is the first stage of filtration; then... Then, the exhaust gas passes through the filter screen when it passes through the second exhaust gas outlet 6, causing the remaining particulate matter in the exhaust gas to collide with the filter screen again, thereby intercepting some of the particulate matter. This is the second stage of filtration. Then, after passing through the filter screen, the exhaust gas continues to pass through the bag filter 4, which is used to intercept fine particles in the exhaust gas. This is the third stage of filtration. Finally, after three stages of filtration, the exhaust gas enters the activated carbon adsorber, which adsorbs the volatile organic compounds (VOCs) in the exhaust gas, and then discharges through the outlet 10.

[0022] This embodiment, by setting up a primary and secondary filtration structure, can separate and recover some large particulate matter (D>10nm) in the exhaust gas. This not only effectively reduces the particulate matter content in the exhaust gas, but also significantly reduces the filtration load of the subsequent filter 4, delaying its clogging and replacement speed. It effectively solves the problems of easy clogging, high replacement frequency, difficult maintenance and operation in the prior art when only a single filter 4 is used for filtration, and is not suitable for exhaust gas treatment scenarios with high particulate matter concentration.

[0023] Example 2 This embodiment is a further supplement to the above embodiment 1. In this embodiment, a first particulate matter receiving container 7 is installed at the bottom of the box between the side of the box with the air inlet 1 and the first baffle 2, and a second particulate matter receiving container 8 is installed at the bottom of the box between the first baffle 2 and the second baffle 3.

[0024] In this embodiment, the first particulate matter receiving container 7 and the second particulate matter receiving container 8 are made of stainless steel, which has wear-resistant and corrosion-resistant properties, and can be adapted to the acidic and alkaline particulate matter corrosion that may exist in the waste gas treatment scenario, while also being easy to clean and maintain. The receiving container is a rectangular trough structure with an open top, and the trough depth is generally 20-30cm. The container volume is designed according to the particulate matter settling amount in the corresponding area inside the box, ensuring that the single receiving amount can meet the continuous operation requirements for 7-15 days, reducing the frequency of cleaning.

[0025] Specifically, four sets of self-locking casters are installed at the bottom of the first particulate matter receiving container 7 and the second particulate matter receiving container 8. The casters are made of silent rubber, which ensures the smooth movement of the trolley at the bottom of the container and avoids noise or scratching of the bottom plate of the container when sliding. An arc-shaped anti-slip handle is also welded on the outer wall of the receiving container for easy gripping and pushing. In addition, a PE material liner bag can be removably laid inside the container tank. When particulate matter needs to be collected in a concentrated manner or there is a risk of secondary pollution, the liner bag can be directly removed to complete the transfer of particulate matter without direct contact with the tank, which improves the convenience and safety of operation.

[0026] Example 3 This embodiment is a further supplement to the above embodiment 2. In this embodiment, particulate guide plates 9 are installed on the upper sides of the first particulate receiving container 7 and the second particulate receiving container 8. The guide surfaces of the particulate guide plates 9 are inclined to the particulate receiving containers.

[0027] In this embodiment, the particulate guide plate 9 is made of stainless steel with a thickness of 1.5-2mm. This ensures structural strength to withstand the impact of exhaust gas flow while also being lightweight for easy installation and fixation. The particulate guide plate 9 is rectangular in shape, with its length matching the width of the corresponding area of ​​the container, allowing it to completely cover the outer edge of the particulate receiving container and ensuring comprehensive coverage of the area where particulates may scatter after colliding with the baffle. Specifically, the tilt angle of the particulate guide plate 9 is generally 30°-45°. This angle allows the particulates to slide down quickly using gravity, preventing them from accumulating on the plate surface, and also reduces obstruction to the main flow of exhaust gas, preventing turbulent airflow within the container due to the guide plate's design.

[0028] Example 4 This embodiment is a further supplement to the above embodiment 1. In this embodiment, three maintenance doors 11 are provided on the housing. The three maintenance doors 11 correspond to the areas of the first baffle 2 and the second baffle 3, the area of ​​the filter 4, and the area of ​​the activated carbon adsorber, respectively. When the purification equipment malfunctions or needs maintenance, the three maintenance doors 11 can be opened for inspection and maintenance.

[0029] In this embodiment, the inspection door 11 is made of cold-rolled steel plate of the same material as the box body, and the surface can be treated with electrostatic powder coating to give it good rust and corrosion resistance. It can form a unified protection system with the box body and is suitable for the complex environment of industrial waste gas treatment.

[0030] Example 5 This embodiment is a further supplement to the above embodiment 1. In this embodiment, an industrial control display screen 12 is installed on the purification equipment box. Correspondingly, the industrial control display screen 12 is electrically connected to a processor. The processor is electrically connected to a sensor installed inside the box. The sensor can collect data such as temperature, humidity, pressure difference, wind speed, and air volume inside the box and transmit them to the processor. After the processor processes the data, it is displayed on the industrial control display screen 12.

[0031] This embodiment enables operators to quickly grasp the equipment's operating status by setting up an industrial control display screen 12, allowing them to receive timely warnings when abnormal situations occur, thus avoiding equipment overload or decreased purification efficiency and reducing the risk of unplanned downtime.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A purification device for removing particulate matter and VOCs from waste gas, comprising a housing, wherein an air inlet (1) is provided on one side of the housing, and an air outlet (10) is provided on the other side opposite to the air inlet (1), and an activated carbon adsorber is installed inside the housing, characterized in that: A first baffle (2), a second baffle (3), and a filter (4) are installed sequentially between the air inlet (1) and the activated carbon adsorber along the direction of exhaust gas flow. A first exhaust gas outlet (5) is left between the upper part of the first baffle (2) and the inner wall of the box. A second exhaust gas outlet (6) is provided at the lower part of the second baffle (3). A filter screen is installed at the second exhaust gas outlet (6).

2. The purification equipment for removing particulate matter and VOCs from waste gas according to claim 1, characterized in that: It also includes a first particulate matter receiving container (7) and a second particulate matter receiving container (8). The first particulate matter receiving container (7) is installed on the bottom of the box between the side of the box with the air inlet (1) and the first baffle (2). The second particulate matter receiving container (8) is installed on the bottom of the box between the first baffle (2) and the second baffle (3).

3. The purification equipment for removing particulate matter and VOCs from waste gas according to claim 2, characterized in that: The first particulate matter receiving container (7) and the second particulate matter receiving container (8) are also equipped with particulate matter guide plates (9) on both sides above, and the guide surfaces of the particulate matter guide plates (9) are inclined to the particulate matter receiving containers.

4. The purification equipment for removing particulate matter and VOCs from waste gas according to claim 1, characterized in that: The filter (4) is a bag filter (4).

5. The purification equipment for removing particulate matter and VOCs from waste gas according to claim 1, characterized in that: Multiple inspection doors (11) are provided on the housing.

6. The purification equipment for removing particulate matter and VOCs from waste gas according to claim 5, characterized in that: Three inspection doors (11) are provided on the housing. The three inspection doors (11) correspond to the areas of the first baffle (2) and the second baffle (3), the area of ​​the filter (4), and the area of ​​the activated carbon adsorber, respectively.

7. A purification device for removing particulate matter and VOCs from waste gas according to any one of claims 1 to 6, characterized in that: An industrial control display screen (12) is also installed on the enclosure.

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