A High-Efficiency Waste Gas Purification System Based on Activated Carbon

Abstract

This utility model discloses a high-efficiency waste gas purification system based on activated carbon, belonging to the field of waste gas treatment technology. It includes a waste gas collection device, a primary moisture-absorbing filter, an activated carbon adsorption tower, a plasma purifier, a secondary filtration device, and an induced draft fan, connected in sequence. The primary moisture-absorbing filter contains several parallel-arranged pre-filters, each composed of a composite of metal wire mesh and non-woven fabric, with a moisture-absorbing packing layer made of silica gel particles filling the spaces between each layer. The activated carbon adsorption tower contains two stages of activated carbon boxes, each filled with a mixture of columnar and granular activated carbon. The plasma purifier consists of a pair of electrode plates and a dielectric barrier discharge area positioned between the two electrode plates. The secondary filtration device has a square box structure and contains a high-efficiency filter. This application effectively removes particulate matter, organic matter, odors, and other pollutants from waste gas through a multi-stage purification process, achieving high purification efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment technology, specifically relating to a high-efficiency waste gas purification system based on activated carbon. Background Technology

[0002] With industrial development, waste gases generated during industrial production have caused serious environmental pollution. Existing waste gas purification systems suffer from low purification efficiency, complex structure, and high operating costs, making it difficult to meet increasingly stringent environmental protection requirements. Therefore, developing a highly efficient, economical, and easy-to-maintain waste gas purification system is of great significance. Summary of the Invention

[0003] To address the aforementioned problems, this utility model discloses a high-efficiency waste gas purification system based on activated carbon. By sequentially connecting a waste gas collection device, a primary moisture-absorbing filter, an activated carbon adsorption tower, a plasma purifier, a secondary filter, and an induced draft fan, a multi-stage purification process is formed, effectively removing pollutants such as particulate matter, organic matter, and odors from the waste gas, resulting in high purification efficiency.

[0004] To achieve the above objectives, the specific technical solution of this application is as follows:

[0005] A high-efficiency waste gas purification system based on activated carbon includes a waste gas collection device, a primary moisture-absorbing filter, an activated carbon adsorption tower, a plasma purifier, a secondary filter, and an induced draft fan connected in sequence.

[0006] The waste gas collection device includes a waste gas collection hood and a waste gas collection pipe connected to the waste gas collection hood.

[0007] The primary moisture-absorbing filter device has several parallel primary filters inside. The primary filters are made of a composite of metal wire mesh and non-woven fabric. Each layer of primary filters is filled with a moisture-absorbing filler layer made of silica gel particles. Adjacent primary filters are fixedly connected by a metal bracket.

[0008] The activated carbon adsorption tower is a cylindrical tower with a carbon steel outer wall and two-stage activated carbon boxes inside. Each activated carbon box is filled with a mixture of columnar and granular activated carbon.

[0009] The plasma purifier consists of a pair of electrode plates and a dielectric barrier discharge region disposed between the two electrode plates. The electrode plates are made of stainless steel and the dielectric barrier discharge region is filled with dielectric material.

[0010] The secondary filtration unit has a square box structure and is equipped with a high-efficiency filter screen inside, which is made of folded filter paper.

[0011] Based on the above technical features, preferably, the induced draft fan is a centrifugal fan with an impeller made of aluminum alloy and a casing made of carbon steel. The air inlet of the induced draft fan is connected to a secondary filtration device, and the air outlet discharges the purified gas to the outside through a pipeline.

[0012] Based on the above technical features, the electrode plate of the plasma purifier is provided with a tip discharge structure, which is a uniformly distributed metal needle tip. The metal needle tip is made of tungsten steel and is welded to the surface of the electrode plate. The distance between adjacent metal needle tips is 3-5mm.

[0013] Based on the above technical features, furthermore, the exhaust gas collection pipe and each connecting pipe are equipped with a manual butterfly valve. The valve body of the manual butterfly valve is made of cast iron, and the valve plate is made of stainless steel. It is used to regulate the flow rate of exhaust gas and control the start and stop of the system.

[0014] Based on the above technical features, preferably, the top of the housing of the primary moisture-absorbing filter is provided with a removable sealing cover. The sealing cover is made of fiberglass and has a sealing ring on the edge. It is fixedly connected to the housing by bolts, which facilitates the replacement and maintenance of the internal primary filter and moisture-absorbing filler layer.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] This application forms a multi-stage purification process by sequentially connecting a waste gas collection device, a primary moisture-absorbing filter, an activated carbon adsorption tower, a plasma purifier, a secondary filter, and an induced draft fan, which effectively removes pollutants such as particulate matter, organic matter, and odors from the waste gas, resulting in high purification efficiency.

[0017] The primary filter and moisture-absorbing packing layer inside the first-stage moisture-absorbing filter work together to filter large particles and absorb moisture in the exhaust gas, preventing moisture from affecting the subsequent activated carbon adsorption effect and extending the service life of the activated carbon.

[0018] The two-stage activated carbon box inside the activated carbon adsorption tower is filled with a mixture of columnar and granular activated carbon, which increases the adsorption surface area and improves the adsorption efficiency, effectively adsorbing organic matter and odors in the exhaust gas.

[0019] Plasma purifiers utilize high-energy electrons and active groups generated by corona discharge to react with pollutants in exhaust gas, decomposing them into harmless substances and further improving the purification effect.

[0020] The high-efficiency filter inside the secondary filtration unit is made of pleated filter paper, which can effectively filter out tiny particulate matter in the exhaust gas and ensure that the emitted gas meets environmental protection standards. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the structure of a high-efficiency waste gas purification system based on activated carbon according to this utility model;

[0022] List of identifiers in attached diagrams:

[0023] 1. Waste gas collection device; 101. Waste gas collection hood; 102. Waste gas collection pipeline; 2. Primary moisture-absorbing filter device; 201. Primary filter screen; 202. Moisture-absorbing packing layer; 203. Sealing cover; 3. Activated carbon adsorption tower; 301. Tower body; 302. Activated carbon box; 4. Plasma purifier; 401. Electrode plate; 402. Dielectric barrier discharge area; 403. Dielectric material; 404. Point discharge structure; 5. Secondary filter device; 501. Pleated filter paper; 6. Exhaust fan; 7. Connecting pipeline; 8. Manual butterfly valve. Detailed Implementation

[0024] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0025] It should be noted that the terms "upper," "lower," "left," "right," "front," and "rear" used in the following description refer to the directions shown in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. Furthermore, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] like Figure 1 As shown, a high-efficiency waste gas purification system based on activated carbon includes a waste gas collection device 1, a primary moisture-absorbing filter device 2, an activated carbon adsorption tower 3, a plasma purifier 4, a secondary filter device 5, and an induced draft fan 6 connected in sequence.

[0027] The exhaust gas collection device 1 includes an exhaust gas collection hood 101 and an exhaust gas collection pipe 102 connected to the exhaust gas collection hood. Preferably, the exhaust gas collection hood 101 is an inverted conical structure, and the exhaust gas collection pipe 102 is a circular steel pipe. One end of the exhaust gas collection pipe 102 is connected to the bottom center of the exhaust gas collection hood, and the other end is connected to the primary moisture absorption filter 2 through a flange.

[0028] The primary moisture-absorbing filter 2 has a stainless steel box structure. Inside the box, there are several parallel primary filter screens 201. The primary filter screens 201 are made of metal wire mesh and non-woven fabric. Each layer of primary filter screens 201 is filled with a moisture-absorbing filler layer 202 made of silica gel particles. Adjacent primary filter screens 201 are fixedly connected by a metal bracket. The top of the box has an air inlet connected to the exhaust gas collection pipe 102, and the bottom has an air outlet connected to the activated carbon adsorption tower 3 through a flange.

[0029] Preferably, the top of the housing of the primary moisture-absorbing filter is provided with a removable sealing cover 203. The sealing cover 203 is made of fiberglass and has a sealing ring on the edge. It is fixed to the housing by bolts, which facilitates the replacement and maintenance of the internal primary filter and moisture-absorbing filler layer.

[0030] The activated carbon adsorption tower 3 is a cylindrical tower body 301. The outer wall of the tower body 301 is made of carbon steel and is treated with anti-corrosion. The interior is filled with two-stage activated carbon boxes 302. Each stage of activated carbon box 302 is filled with a mixture of columnar activated carbon and granular activated carbon. The mixing ratio can be adjusted according to the actual situation. An air inlet is provided at the top of the tower body 301 and connected to the first-stage filter device 2. An air outlet is provided at the bottom and connected to the plasma purifier 4 through a flange.

[0031] The plasma purifier 4 consists of a pair of electrode plates 401 and a dielectric barrier discharge region 402 disposed between the two electrode plates. The electrode plates 401 are made of stainless steel, and the dielectric barrier discharge region 402 is filled with dielectric material 403. The air inlet is connected to the activated carbon adsorption tower 3 via a flange, and the air outlet is connected to the secondary filtration device 5 via a flange. Preferably, the electrode plates 401 of the plasma purifier are provided with a tip discharge structure 404, which is a uniformly distributed metal needle tip made of tungsten steel, welded to the surface of the electrode plate, with a spacing of 3-5 mm between adjacent metal needle tips.

[0032] The secondary filtration device 5 has a square box structure and is equipped with a high-efficiency filter screen inside. The high-efficiency filter screen is made of folded filter paper 501. The air inlet of the secondary filtration device 5 is connected to the plasma purifier 4, and the air outlet is connected to the induced draft fan 6 through a flange.

[0033] The induced draft fan 6 is a centrifugal fan with an aluminum alloy impeller and a carbon steel casing. The air inlet of the induced draft fan is connected to the secondary filter device 5, and the air outlet discharges the purified gas to the outside through a pipe.

[0034] The exhaust gas collection pipe 102 and each connecting pipe 7 are equipped with a manual butterfly valve 8. The valve body of the manual butterfly valve 8 is made of cast iron and the valve plate is made of stainless steel. It is used to regulate the flow of exhaust gas and control the start and stop of the system.

[0035] Working principle:

[0036] During operation, exhaust gas enters the primary moisture-absorbing filtration unit through the exhaust gas collection hood and collection pipe. In this unit, the exhaust gas first passes through a pre-filter to remove large particles, and then passes through a moisture-absorbing packing layer to absorb moisture. The treated exhaust gas then enters an activated carbon adsorption tower, where two stages of activated carbon adsorption remove organic matter and odors. Next, the exhaust gas enters a plasma purifier, where high-energy electrons and active groups generated by corona discharge decompose pollutants into harmless substances. The purified exhaust gas then passes through a high-efficiency filter in the secondary filtration unit to further remove fine particulate matter. Finally, the purified gas is discharged outdoors through pipes by an induced draft fan.

[0037] Throughout the operation, the manual butterfly valve can adjust the flow rate of the exhaust gas and control the system's start and stop as needed, ensuring stable system operation. The sealing cover of the primary moisture-absorbing filter can be opened periodically to replace and maintain the internal pre-filter and moisture-absorbing packing layer, ensuring the system's purification effect.

[0038] It should be noted that the accompanying drawings merely illustrate the technical concept of the present invention and should not be used to limit the scope of protection of the present invention. For those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and all such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. An activated carbon based high efficiency exhaust gas purification system characterized by: It includes a waste gas collection device, a primary moisture-absorbing filter, an activated carbon adsorption tower, a plasma purifier, a secondary filter, and an induced draft fan connected in sequence. The waste gas collection device includes a waste gas collection hood and a waste gas collection pipe connected to the waste gas collection hood. The primary moisture-absorbing filter device has several parallel primary filters inside. The primary filters are made of a composite of metal wire mesh and non-woven fabric. Each layer of primary filter is filled with a moisture-absorbing filler layer made of silica gel particles. Adjacent primary filters are fixedly connected by a metal bracket. The activated carbon adsorption tower is a cylindrical tower with a carbon steel outer wall and two-stage activated carbon boxes inside. Each activated carbon box is filled with a mixture of columnar and granular activated carbon. The plasma purifier consists of a pair of electrode plates and a dielectric barrier discharge region disposed between the two electrode plates. The electrode plates are made of stainless steel and the dielectric barrier discharge region is filled with dielectric material. The secondary filtration unit has a square box structure and is equipped with a high-efficiency filter screen inside, which is made of folded filter paper.

2. An activated carbon based high efficiency exhaust gas purification system according to claim 1, characterized in that: The induced draft fan is a centrifugal fan with an aluminum alloy impeller and a carbon steel casing. The air inlet of the induced draft fan is connected to a secondary filtration device, and the air outlet discharges the purified gas to the outside through a pipeline.

3. The high efficiency exhaust gas purification system based on activated carbon according to claim 1, characterized in that: The plasma purifier has a tip discharge structure on its electrode plate. The tip discharge structure consists of uniformly distributed metal needles made of tungsten steel, which are welded to the surface of the electrode plate. The distance between adjacent metal needles is 3-5 mm.

4. The high efficiency exhaust gas purification system based on activated carbon according to claim 1, characterized in that: The exhaust gas collection pipe and each connecting pipe are equipped with a manual butterfly valve. The valve body of the manual butterfly valve is made of cast iron, and the valve plate is made of stainless steel. It is used to regulate the flow of exhaust gas and control the start and stop of the system.

5. The high efficiency exhaust gas purification system based on activated carbon according to claim 1, characterized in that: The top of the primary moisture-absorbing filter unit is equipped with a removable sealing cover made of fiberglass with sealing rings on the edges. It is fixed to the unit with bolts, which facilitates the replacement and maintenance of the internal primary filter and moisture-absorbing filler layer.

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