Surface treatment exhaust gas treatment device

Abstract

The utility model discloses a surface treatment waste gas treatment device, include: waste gas air suction cover body is located the positive top of surface treatment machine, and the peripheral size of four around is greater than the peripheral size of surface treatment machine, including panel, guide rail, roller shutter window and filter screen. Waste gas conveying unit includes governing valve and waste gas fan, and the waste gas in waste gas air suction cover is collected and is conveyed to waste gas absorption tank. Waste gas absorption tank is the closed container storage tank, and the bottom is provided with gas distributor and drain, and the top is provided with exhaust port and water inlet. Waste water conveying unit includes ammonia nitrogen detector and drainage pump, and ammonia nitrogen detector real -time monitoring solution's concentration in waste gas absorption tank, when reaches the set emission concentration, and conveys signal to drainage pump, and opens water pump and conveys waste water to the device outside. The utility model creates the structure space close to the closed of surface treatment machine, carries out organized collection to the waste gas produced, and carries out dissolution absorption and secondary adsorption to the collected waste gas, reduces the pollution of ammonia gas to production line operation environment.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber production waste gas treatment technology, and in particular to a surface treatment waste gas treatment device. Background Technology

[0002] Surface treatment is a step in the carbon fiber production process, which can alter the surface properties, structure, and morphology of carbon fibers, thereby improving the strength, oxidation resistance, and plasticity of carbon fiber composites. When pyrolytic electrolytes (ammonium carbonate, ammonium bicarbonate, ammonium hydrogen phosphate, ammonium dihydrogen phosphate) are used as surface treatment agents, they are easily decomposed and released into the atmosphere during production. Currently, surface treatment machines are open structures, with only a slight negative air collection through a suction hood. This results in low concentration and large air volume, primarily collecting ambient air, which cannot achieve ideal collection results. Utility Model Content

[0003] The purpose of this utility model is to provide a surface treatment waste gas treatment device.

[0004] The technical solution provided to achieve the purpose of this invention is as follows:

[0005] A surface treatment exhaust gas treatment device, the device comprising

[0006] The exhaust gas suction hood body;

[0007] The exhaust hood is located directly above the surface treatment machine.

[0008] The outer dimensions of the exhaust gas suction hood are larger than the outer dimensions of the surface treatment machine.

[0009] The exhaust hood body is surrounded by a panel, guide rails, roller shutters and filters, forming a surrounding structure around the surface treatment machine;

[0010] Waste gas absorption box;

[0011] The waste gas absorption box is a sealed container storage tank.

[0012] The top of the waste gas absorption box is equipped with an exhaust port and a water inlet, and the bottom is equipped with a gas distributor and a drain port.

[0013] Exhaust gas conveying unit;

[0014] One end of the exhaust gas conveying unit is connected to the exhaust gas suction hood body, and the other end is connected to the exhaust gas absorption box. It is used to convey the exhaust gas collected in the exhaust gas suction hood to the exhaust gas absorption box.

[0015] The exhaust gas conveying unit includes a regulating valve and an exhaust gas fan;

[0016] Wastewater transport unit;

[0017] The wastewater conveying unit is connected to the waste gas absorption box.

[0018] The wastewater conveying unit includes an ammonia nitrogen detector and a drainage pump, which are respectively connected to the waste gas absorption box.

[0019] To overcome the shortcomings of the existing technology, the advantages of this utility model are:

[0020] 1) The exhaust hood surrounds the surface treatment machine, creating a near-sealed structural space to collect the exhaust gas generated in the surface treatment machine in an organized manner, and the amount of exhaust gas collected can be reduced by adjusting the fan.

[0021] 2) Based on the characteristic that ammonia is highly soluble in water, the waste gas absorption box is a sealed container tank. The aqueous solution inside can dissolve and absorb ammonia in the first stage. When the concentration exceeds the standard and is about to be discharged from the absorption box through the exhaust port, the activated carbon adsorbent can adsorb ammonia in the second stage, reducing the pollution of ammonia to the production line working environment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the surface treatment waste gas treatment device of this utility model.

[0023] Among them, 1-Surface treatment machine; 2-Exhaust gas suction hood body; 201-Rectangular panel; 202-Conical panel; 203-Top plate; 204-Guide rail; 205-Roller shutter; 206-Filter screen; 3-Regulating valve; 4-Exhaust gas fan; 5-Exhaust gas absorption box; 501-Gas distributor; 502-Drain outlet; 503-Water inlet; 504-Exhaust outlet; 505-Adsorbent; 6-Ammonia nitrogen detector; 7-Drain pump. Detailed Implementation

[0024] Combination Figure 1 The specific embodiments of this utility model are described in detail.

[0025] This utility model relates to a surface treatment exhaust gas treatment device, which is arranged around a surface treatment machine 1 and includes:

[0026] 2. Exhaust gas suction hood body;

[0027] The exhaust hood body 2 is located directly above the surface treatment machine 1.

[0028] The outer perimeter of the exhaust gas suction hood body 2 is larger than the outer perimeter of the surface treatment machine 1.

[0029] The exhaust hood body 2 is surrounded by panels (201, 202, 203), guide rails 204, roller shutters 205 and filters 206, forming a surrounding structure around the surface treatment machine.

[0030] Waste gas absorption box 5;

[0031] Waste gas absorption box 5 is a sealed container storage tank.

[0032] The top of the exhaust gas absorption box 5 is provided with an exhaust port 504 and a water inlet 503, and the bottom is provided with a gas distributor 501 and a drain port 502.

[0033] Exhaust gas conveying unit;

[0034] One end of the exhaust gas conveying unit is connected to the exhaust gas suction hood body 2, and the other end is connected to the exhaust gas absorption box 5, which is used to convey the exhaust gas collected in the exhaust gas suction hood 2 to the exhaust gas absorption box 5.

[0035] The exhaust gas conveying unit includes a regulating valve 3 and an exhaust gas fan 4;

[0036] Wastewater transport unit;

[0037] The wastewater conveying unit is connected to the waste gas absorption box 5.

[0038] The wastewater conveying unit includes an ammonia nitrogen detector 6 and a drainage pump 7, which are respectively connected to the waste gas absorption box 5.

[0039] The present invention provides the following specific solution: the panel of the exhaust gas suction hood body 2 includes a conical panel 202 at the upper end, a rectangular panel 201 at the lower end, and a top plate 203 with an exhaust gas inlet at the top.

[0040] The present invention provides the following specific solution: the tapered panel 202, the rectangular panel 201 and the top plate 203 are respectively a 304 stainless steel tapered panel, a 304 stainless steel rectangular panel and a 304 stainless steel top plate.

[0041] The present invention provides the following specific solution: one end of the guide rail 204 is set on the rectangular panel 201, and the other end is set on the surface treatment machine 1.

[0042] The present invention provides the following specific solution: the roller shutter 205 is set between the two end guide rails 204, and is a horizontal outward opening type from the middle to both sides. The roller shutters 204 set around the perimeter can all be operated independently by electric motor.

[0043] The present invention provides the following specific solution: the filter screen 206 is set on the upper conical panel 202, and is a removable filter screen made of 304 stainless steel with a mesh size of 100-300.

[0044] The present invention provides the following specific solution: the regulating valve 3 is a manual or electric control regulating valve, and the exhaust gas fan 4 is a frequency converter control exhaust gas fan.

[0045] The present invention provides the following specific solution: the gas distributor 501 is a tubular or disc-type horizontally distributed gas distributor, and small holes are opened on the surface of the gas distributor 501.

[0046] The present invention provides the following specific solution: an activated carbon adsorbent 505 is provided on the exhaust port 504.

[0047] The present invention provides the following specific solution: A feedback control connection is established between the ammonia nitrogen detector 6 and the drainage pump 7. The ammonia nitrogen detector 6 monitors the concentration of the solution in the waste gas absorption tank 5 in real time. When the set emission concentration is reached, a signal is sent to the drainage pump 7, which then starts to pump the wastewater outside the device. All components can be controlled via a PLC.

[0048] The working process of this surface treatment exhaust gas treatment device is as follows:

[0049] During carbon fiber production, surface treatment waste gas is efficiently captured by the suction hood 2 under the negative pressure suction of the waste gas fan 4. With the coordinated operation of the waste gas fan 4 and the regulating valve 3, the pressure and volume of the waste gas are regulated, achieving dynamic control of the waste gas transport process. This ensures that the suction hood 2 maintains an adjustable air exchange rate of 1-20 times per hour. The captured waste gas is evenly dispersed into fine bubbles or a thin layer of air by the gas distributor 501, increasing the effective contact area between the waste gas and the solution in the absorption box 5. The fully diffused waste gas passes through the specific absorbent liquid inside the box, undergoing a gas-liquid reaction to achieve preliminary purification. After preliminary purification, the gas escapes from the solution and remains in the upper space of the absorption box 5. To further remove any remaining trace amounts of gaseous pollutants and odors, the gas then flows through the activated carbon adsorbent 505 installed inside the absorption box 5. Finally, the purified gas, after absorption and adsorption treatment, is safely discharged into the atmosphere through the exhaust port 504. As the absorbent undergoes continuous gas-liquid reaction, its effective components are gradually consumed, while pollutants in the exhaust gas accumulate and increase. An ammonia nitrogen detector 6 is installed inside the absorption tank to monitor the status of key indicators in the absorbent in real time. When the monitored concentration reaches the set emission concentration of 150-300 mg / L, a control signal is automatically triggered to start the drainage pump 7 to drain the saturated wastewater that has reached the set concentration from the absorption tank. At the same time, the same volume of fresh water is injected into the tank through the inlet to ensure the real-time response of the concentration monitoring data of the exhaust gas absorption and treatment device, the equal replacement of wastewater and fresh water, the continuous and stable operation of the purification treatment, and the continuous and efficient purification capacity.

Claims

1. A surface treatment exhaust gas treatment device, the device being arranged around a surface treatment machine, characterized in that, include: The exhaust gas suction hood body; The exhaust hood is located directly above the surface treatment machine. The outer dimensions of the exhaust gas suction hood are larger than the outer dimensions of the surface treatment machine. The exhaust hood body is surrounded by a panel, guide rails, roller shutters and filters, forming a surrounding structure around the surface treatment machine; Waste gas absorption box; The waste gas absorption box is a sealed container storage tank. The top of the waste gas absorption box is equipped with an exhaust port and a water inlet, and the bottom is equipped with a gas distributor and a drain port. Exhaust gas conveying unit; One end of the exhaust gas conveying unit is connected to the exhaust gas suction hood body, and the other end is connected to the exhaust gas absorption box. It is used to convey the exhaust gas collected in the exhaust gas suction hood to the exhaust gas absorption box. The exhaust gas conveying unit includes a regulating valve and an exhaust gas fan; Wastewater transport unit; The wastewater conveying unit is connected to the waste gas absorption box. The wastewater conveying unit includes an ammonia nitrogen detector and a drainage pump, which are respectively connected to the waste gas absorption box.

2. The surface treatment waste gas treatment device according to claim 1, characterized in that, The exhaust gas suction hood body panel includes a conical panel at the upper end, a rectangular panel at the lower end, and a top plate with an exhaust gas inlet at the top.

3. The surface treatment waste gas treatment device according to claim 2, characterized in that, The tapered panel, rectangular panel, and top plate are respectively a 304 stainless steel tapered panel, a 304 stainless steel rectangular panel, and a 304 stainless steel top plate.

4. The surface treatment waste gas treatment device according to claim 2, characterized in that, One end of the guide rail is set on the rectangular panel, and the other end is set on the surface treatment machine.

5. The surface treatment waste gas treatment device according to claim 4, characterized in that, The roller shutter is located between the two guide rails and opens horizontally outward from the center to both sides. The roller shutters on all four sides can be operated independently by motor.

6. The surface treatment waste gas treatment device according to claim 1, characterized in that, The filter screen is located on the upper conical panel. It is a removable filter screen made of 304 stainless steel with a mesh size of 100-300.

7. The surface treatment waste gas treatment device according to claim 1, characterized in that, The regulating valve is a manual or electric control regulating valve, and the exhaust gas fan is a frequency converter control exhaust gas fan.

8. The surface treatment waste gas treatment device according to claim 1, characterized in that, The gas distributor is a tubular or disc-type horizontally distributed gas distributor with small holes on its surface.

9. The surface treatment waste gas treatment device according to claim 1, characterized in that, Activated carbon adsorbent is provided on the exhaust port.

10. The surface treatment waste gas treatment device according to claim 1, characterized in that, The ammonia nitrogen detector and the drainage pump are connected by a feedback control system. The ammonia nitrogen detector monitors the concentration of the solution in the waste gas absorption box in real time. When the set emission concentration is reached, it sends a signal to the drainage pump, which then turns on to transport the wastewater outside the device.

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