A viscose-based carbon fiber production waste gas treatment device
By designing a waste gas treatment device that includes spray pipes, filter screens, and activated carbon fiber cloth, the problems of substandard and inefficient waste gas treatment in the production of viscose-based carbon fiber were solved, achieving efficient purification of waste gas and timely replacement of filter materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINXIANG CHEM FIBER
- Filing Date
- 2025-09-02
- Publication Date
- 2026-06-26
AI Technical Summary
The production process of viscose-based carbon fiber suffers from problems such as difficulty in meeting waste gas treatment standards, untimely replacement of filter media, and low treatment efficiency due to reliance on the self-flowing of waste gas.
An exhaust gas treatment device was designed, comprising a treatment box, spray pipes, filter screens, activated carbon fiber cloth, filter frames, pressure gauges, induced draft fans, and exhaust fans. Through the combined use of spraying, filtration, and induced draft fans, efficient treatment of exhaust gas is achieved.
Effectively remove large particulate matter from exhaust gas, replace filter media in a timely manner, improve treatment efficiency, and ensure that exhaust gas meets emission standards.
Smart Images
Figure CN224404750U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of fiber production technology, and in particular relates to a waste gas treatment device for viscose-based carbon fiber production. Background Technology
[0002] Viscose-based carbon fiber refers to carbon fiber prepared from viscose fiber through pre-oxidation and carbonization. Viscose fiber is a regenerated cellulose fiber, also known as rayon, which is made from natural fibers such as wood, hemp, and cotton through pulping, sulfonation, curing, and spinning. Viscose-based carbon fiber is a fiber material with carbon as its main component, obtained by using viscose fiber as raw material, performing low-temperature heat treatment, and then high-temperature heat treatment at above 800℃ in a non-oxidizing atmosphere. However, in actual production, it generates a large amount of waste gas, and the treatment of this waste gas has the following drawbacks:
[0003] Because the waste gas generated during the production of viscose-based carbon fiber has a complex composition, containing both organic and inorganic substances, as well as a small amount of coal tar, it is difficult to treat. Direct discharge without treatment will pollute the environment. Conventional waste gas treatment methods are not thorough enough and it is difficult to make it meet emission standards.
[0004] Secondly, in the waste gas treatment method, if some filtration is required, these filter media need to be replaced regularly to ensure good treatment effect. However, these filter media are inside the treatment device, and external personnel cannot know in time whether they need to be replaced.
[0005] Finally, some exhaust gas treatment devices rely on the natural flow of exhaust gas to rise and then be treated as it passes through the treatment device. The overall treatment process is inefficient, as it depends entirely on the natural flow of exhaust gas, which is not only inefficient but can also easily lead to blockage of the exhaust passage. Utility Model Content
[0006] The purpose of this utility model is to provide a waste gas treatment device for viscose-based carbon fiber production. By setting up a treatment box, spray pipe, filter screen, activated carbon fiber cloth, filter frame, pressure gauge, induced draft fan, and exhaust fan, it solves the problems of difficulty in treating waste gas to meet standards during viscose-based carbon fiber production, inability to know in a timely manner whether the filter material needs to be replaced during waste gas treatment, and low treatment efficiency caused by reliance on the flow of waste gas itself.
[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0008] This utility model is a waste gas treatment device for viscose-based carbon fiber production, including a treatment box, a water pump, a sealing plate, a filter frame, and spray pipes. The treatment box has a partition fixed inside, and a spray chamber and a purification chamber are respectively arranged in the treatment box on both sides of the partition. Two spray pipes are fixed on the inner wall of the treatment box in the spray chamber. The lower part of the spray pipes is fixed with equally spaced nozzles. The sealing plate is inserted through the front side of the treatment box outside the spray chamber. Two horizontally placed and vertically distributed frames are fixed on the side of the sealing plate near the spray chamber, and a filter screen is fixed inside the frames. The frames are located inside the spray chamber and below the spray pipes.
[0009] Two vertically arranged filter frames are inserted into the purification chamber, and activated carbon fiber cloth is fixed inside the filter frames.
[0010] Furthermore, an air inlet duct is fixedly connected to the end of the treatment box near the spray chamber, and an exhaust fan is fixed inside the air inlet duct. An air outlet duct is fixedly connected to the end of the treatment box near the purification chamber, and an exhaust fan is fixed inside the air outlet duct.
[0011] Furthermore, the partition has a through opening that is diagonally arranged with the air inlet duct and is connected to the spray chamber and the purification chamber.
[0012] Furthermore, a water pump is installed below the air inlet duct, and a water pumping pipe is fixed to the water pumping end. The end of the water pumping pipe away from the water pump passes through the end wall of the treatment box and communicates with the spray chamber. The water pumping pipe is located below the lowest frame and contacts the inner bottom of the spray chamber. A water inlet pipe is fixed through the front side of the treatment box below the sealing plate, and the height of the water inlet pipe is higher than that of the water pumping pipe.
[0013] Furthermore, the water pump has a fixed outlet pipe at its outlet end, and the outlet pipe is designed in an L-shape. The horizontal part of the outlet pipe is located at the top of the treatment box above the spray chamber, and a branch pipe is fixed through the upper part of the spray pipe. The top of the branch pipe passes through the top surface of the treatment box and is connected through the horizontal part of the outlet pipe.
[0014] Furthermore, two sets of tracks are fixed on the inner wall of the treatment box inside the spray chamber, and the two frames are respectively inserted into the tracks corresponding to their heights on both sides; the side of the sealing plate away from the frame is flush with the front side of the treatment box, and two handles are fixed on the side of the sealing plate away from the frame; four pins are fixed on the front side of the treatment box outside the sealing plate, and limit pins are rotatably connected to the pins.
[0015] Furthermore, two sets of horizontally parallel tracks are fixed inside the processing box within the purification chamber. The filter frame passes through the front side of the filter box and is inserted into the corresponding track. The front side of the filter frame is flush with the front side of the processing box, and a base plate is fixed to the front side of the filter frame. A handle is fixed to the base plate. A pin is fixed to the front side of the processing box outside the filter frame, and a limit pin is rotatably connected to the pin.
[0016] Furthermore, three pressure gauges are fixed on the top of the treatment box above the purification chamber, and the probes of the pressure gauges extend into the purification chamber. Pressure gauges are also installed on the top of the purification chamber at both ends of each filter frame.
[0017] This utility model has the following beneficial effects:
[0018] This invention solves the problem of difficult-to-treat waste gas during the production of viscose-based carbon fiber by setting up a treatment box, spray pipe, filter screen, activated carbon fiber cloth, and filter frame. The waste gas generated during the production of viscose-based carbon fiber is introduced into the treatment box, first entering the spray chamber. A water pump draws water from the bottom of the spray chamber and inputs it into the spray pipe, which then sprays it out from the nozzle to spray the waste gas entering the spray chamber, removing large particles. Then, the waste gas passes through a partition through an opening and enters the purification chamber, where it is filtered by two layers of activated carbon fiber cloth, undergoing secondary treatment, and finally achieving compliant discharge, effectively removing harmful substances from the waste gas.
[0019] This invention solves the problem of not being able to know in a timely manner whether the filter material needs to be replaced during waste gas treatment by setting a pressure gauge. By observing the pressure difference between two adjacent pressure gauges, it can be known whether the activated carbon fiber cloth between the two pressure gauges is blocked due to filtering impurities. If the pressure difference is greater than the standard, it means that the activated carbon fiber cloth has filtered a large amount of impurities and needs to be replaced. At this time, timely replacement is sufficient.
[0020] This invention solves the problem of low treatment efficiency caused by relying on the flow of waste gas itself during waste gas treatment by setting up an induced draft fan and an exhaust fan. The induced draft fan quickly introduces the waste gas to be treated and enters the treatment box through the air inlet duct, while the exhaust fan quickly extracts and discharges the purified waste gas from the purification chamber. It can also accelerate the filtration process of activated carbon fiber cloth, speed up the treatment efficiency, and shorten the treatment time. Attached Figure Description
[0021] 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.
[0022] Figure 1 A perspective view of a waste gas treatment device for viscose-based carbon fiber production;
[0023] Figure 2 for Figure 1 A structural diagram from another perspective;
[0024] Figure 3 A cross-sectional view of a waste gas treatment device for viscose-based carbon fiber production.
[0025] Figure 4 This is a sectional view of the processing box;
[0026] Figure 5 This is a diagram showing the connection between the sealing plate and the frame;
[0027] Figure 6 This is a diagram showing the connection between the filter frame and the activated carbon fiber cloth.
[0028] Figure label:
[0029] 1. Processing box; 101. Air inlet duct; 1011. Exhaust fan; 102. Air outlet duct; 1021. Exhaust fan; 103. Pin 1; 1031. Limit pin 1; 104. Pin 2; 1041. Limit pin 2; 105. Pressure gauge; 106. Water inlet pipe; 107. Spray chamber; 1071. Track 1; 108. Purification chamber; 1081. Track 2; 109. Partition; 1091. Opening; 2. Water pump; 201. Pumping pipe; 202. Water outlet pipe; 3. Sealing plate; 301. Handle 1; 302. Frame; 303. Filter screen; 4. Filter frame; 401. Base plate; 402. Handle 2; 403. Activated carbon fiber cloth; 5. Spray pipe; 501. Spray head; 502. Branch pipe. Detailed Implementation
[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0031] Please see Figure 1-6 As shown, this utility model is a waste gas treatment device for viscose-based carbon fiber production, including a treatment box 1, a water pump 2, a sealing plate 3, a filter frame 4, and a spray pipe 5. A partition 109 is fixed inside the treatment box 1. A spray chamber 107 and a purification chamber 108 are respectively arranged in the treatment box 1 on both sides of the partition 109. Two spray pipes 5 are fixed on the inner wall of the treatment box 1 in the spray chamber 107. Spray nozzles 501 are evenly distributed at the lower part of the spray pipes 5. A sealing plate 3 is inserted through the front side of the treatment box 1 outside the spray chamber 107. Two horizontally placed and vertically distributed frames 302 are fixed on the side of the sealing plate 3 near the spray chamber 107. A filter screen 303 is fixed inside the frame 302. The frame 302 is located inside the spray chamber 107 and below the spray pipes 5.
[0032] The treatment box 1 is divided into two chambers by a partition 109, namely the spray chamber 107 and the purification chamber 108. When the exhaust gas enters the spray chamber 107, the nozzle 501 under the spray pipe 5 sprays water and comes into contact with the exhaust gas. After the exhaust gas comes into contact with the water, the large particles in it increase their specific gravity and settle, forming sewage. This sewage is then filtered through the filter screen 303 in the side frame 302 of the sealing plate 3 and then sprayed again for reuse.
[0033] Two vertically distributed filter frames 4 are inserted into the purification chamber 108, and activated carbon fiber cloth 403 is fixed inside the filter frames 4. When the waste gas enters the purification chamber 108 after being sprayed, it is discharged after being filtered by the two layers of activated carbon fiber cloth 403, thus filtering out impurities in the waste gas.
[0034] An air inlet duct 101 is fixedly connected to the end of the treatment box 1 near the spray chamber 107, and an exhaust fan 1011 is fixed inside the air inlet duct 101. An air outlet duct 102 is fixedly connected to the end of the treatment box 1 near the purification chamber 108, and an exhaust fan 1021 is fixed inside the air outlet duct 102.
[0035] The air inlet duct 101 is connected to the source of the exhaust gas. The exhaust gas is quickly drawn into the treatment box 1 by the induced draft fan 1011. After being processed by the internal components of the treatment box 1, the exhaust gas is drawn out by the exhaust fan 1021 and quickly discharged to the outside through the air outlet duct 102, which speeds up the exhaust gas treatment process, shortens the treatment time, and increases the flow of exhaust gas.
[0036] A through opening 1091 is provided inside the partition 109, and the through opening 1091 is diagonally arranged with the air inlet duct 101. The through opening 1091 is connected to the spray chamber 107 and the purification chamber 108.
[0037] The port 1091 connects the spray chamber 107 and the purification chamber 108, allowing the waste gas treated in the spray chamber 107 to enter the purification chamber 108.
[0038] A water pump 2 is installed below the air inlet duct 101. A water pump pipe 201 is fixed to the water pump 2's pumping end. The end of the water pump pipe 201 away from the water pump 2 passes through the end wall of the treatment box 1 and communicates with the spray chamber 107. The water pump pipe 201 is located below the lowest frame 302 and contacts the inner bottom of the spray chamber 107. A water inlet pipe 106 is fixed through the front side of the treatment box 1 below the sealing plate 3, and the water inlet pipe 106 is higher than the height of the water pump pipe 201.
[0039] When the water pump 2 is working, it draws water from the lower part of the spray chamber 107 through the water pumping pipe 201. If there is not enough spray water, it is supplemented through the water inlet pipe 106, but the water level does not exceed the height of the filter screen 303.
[0040] The outlet end of the water pump 2 is fixed with an outlet pipe 202, and the outlet pipe 202 is designed in an L shape. The horizontal part of the outlet pipe 202 is located on the top of the treatment box 1 above the spray chamber 107, and a branch pipe 502 is fixed through the upper part of the spray pipe 5. The top of the branch pipe 502 penetrates the top surface of the treatment box 1 and is connected through the horizontal part of the outlet pipe 202.
[0041] After the water pump 2 draws the spray water, it is discharged from the outlet pipe 202, input into the spray pipe 5 through the branch pipe 502, and then sprayed out through the nozzle 501 under the spray pipe 5 to spray the exhaust gas passing below it.
[0042] Two sets of tracks 1071 are fixed on the inner wall of the treatment box 1 inside the spray chamber 107. The two frames 302 are inserted into the tracks 1071 corresponding to their heights on both sides. The side of the sealing plate 3 away from the frame 302 is flush with the front side of the treatment box 1, and two handles 301 are fixed on the side of the sealing plate 3 away from the frame 302. Four pins 103 are fixed on the front side of the treatment box 1 outside the sealing plate 3, and limit pins 1031 are rotatably connected to the pins 103.
[0043] Insert the frame 302 on the side of the sealing plate 3 along the track 1071 into the spray chamber 107 until the front of the sealing plate 3 is completely flush with the front of the treatment box 1. Then rotate the limiting pin 1031 outside the pin 103 to form a shape as shown. Figure 1 As shown, this prevents the sealing plate 3 from sliding out during operation.
[0044] Inside the purification chamber 108, there are two sets of horizontally parallel tracks 1081 fixed inside the processing box 1. The filter frame 4 passes through the front side of the filter box and is inserted into the corresponding track 1081. The front side of the filter frame 4 is flush with the front side of the processing box 1, and a base plate 401 is fixed to the front side of the filter frame 4. A handle 402 is fixed on the base plate 401. A pin 104 is fixed to the front side of the processing box 1 outside the filter frame 4, and a limit pin 1041 is rotatably connected to the pin 104.
[0045] When installing the filter frame 4, insert it along the track 1081 from the front of the treatment box 1 into the purification chamber 108 until the front of the filter frame 4 is flush with the front of the treatment box 1. Then rotate the limiting pin 1041 outside the pin 104 to restrict the filter frame 4 from sliding out and keep it stable.
[0046] Three pressure gauges 105 are fixed on the top of the treatment box 1 above the purification chamber 108, and the probes of the pressure gauges 105 extend into the purification chamber 108. Pressure gauges 105 are also installed on the top of the purification chamber 108 at both ends of each filter frame 4. By observing the pressure difference between two adjacent pressure gauges 105, it can be determined whether the activated carbon fiber cloth 403 between the two pressure gauges 105 is blocked due to the filtration of impurities. If the pressure difference is greater than the standard, it means that the activated carbon fiber cloth 403 has filtered a large amount of impurities and needs to be replaced.
[0047] The specific working principle of this utility model is as follows: First, install the sealing plate 3, hold the handle 301, and insert the frame 302 on the side of the sealing plate 3 along the track 1071 into the spray chamber 107 until the front side of the sealing plate 3 is completely flush with the front side of the treatment box 1. Then, rotate the limiting pin 1031 outside the pin 103 to form the following shape. Figure 1 In the state shown, the filter frame 4 is then installed. The filter frame 4 is inserted from the front of the treatment box 1 along the track 1081 and enters the purification chamber 108 until the front of the filter frame 4 is flush with the front of the treatment box 1. Then, the limiting pin 1041 outside the pin 104 is rotated to restrict the filter frame 4 from sliding out and keep it stable.
[0048] When treating exhaust gas, the air inlet duct 101 is connected to the source of the exhaust gas. The exhaust gas is quickly drawn into the treatment box 1 by the induced draft fan 1011. The water pump 2 works to draw water from the lower part of the spray chamber 107 through the water extraction pipe 201, and leads it out through the water outlet pipe 202. It is then input into the spray pipe 5 through the branch pipe 502, and then sprayed out through the nozzle 501 under the spray pipe 5 to spray the exhaust gas passing below, removing large particles from the exhaust gas. The treated exhaust gas enters the purification chamber 108 through the opening 1091 on the partition 109. Then, it is filtered by the activated carbon fiber cloth 403 in the two filter frames 4, which performs secondary treatment of the exhaust gas, effectively removing harmful substances from the exhaust gas. Finally, it is drawn out by the exhaust fan 1021 and quickly discharged to the outside through the air outlet duct 102, completing the purification treatment.
[0049] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present utility model.
Claims
1. A waste gas treatment device for viscose-based carbon fiber production, comprising a treatment box (1), a water pump (2), a sealing plate (3), a filter frame (4), and a spray pipe (5), characterized in that: The processing box (1) is fixed with a partition (109) inside. The processing box (1) on both sides of the partition (109) is respectively provided with a spray chamber (107) and a purification chamber (108). Two spray pipes (5) are fixed on the inner wall of the processing box (1) inside the spray chamber (107). Spray nozzles (501) are fixed at equal intervals at the lower part of the spray pipes (5). A sealing plate (3) is inserted through the front side of the processing box (1) outside the spray chamber (107). Two horizontally placed and vertically distributed frames (302) are fixed on the side of the sealing plate (3) near the spray chamber (107). A filter screen (303) is fixed inside the frame (302). The frame (302) is located inside the spray chamber (107) and below the spray pipes (5). Two vertically distributed filter frames (4) are inserted into the purification chamber (108), and activated carbon fiber cloth (403) is fixed inside the filter frames (4).
2. The waste gas treatment device for viscose-based carbon fiber production according to claim 1, characterized in that: An air inlet duct (101) is fixedly connected to the end of the treatment box (1) near the spray chamber (107), and an exhaust fan (1011) is fixed inside the air inlet duct (101). An air outlet duct (102) is fixedly connected to the end of the treatment box (1) near the purification chamber (108), and an exhaust fan (1021) is fixed inside the air outlet duct (102).
3. The waste gas treatment device for viscose-based carbon fiber production according to claim 2, characterized in that: The partition (109) has a through opening (1091) that is diagonally arranged with the air inlet (101). The through opening (1091) is connected to the spray chamber (107) and the purification chamber (108).
4. The waste gas treatment device for viscose-based carbon fiber production according to claim 2, characterized in that: A water pump (2) is installed below the air inlet duct (101). A water pump pipe (201) is fixed to the water pump (2) at the water pump end. The end of the water pump pipe (201) away from the water pump (2) passes through the end wall of the treatment box (1) and communicates with the spray chamber (107). The water pump pipe (201) is located below the lowest frame (302) and contacts the inner bottom of the spray chamber (107). A water inlet pipe (106) is fixed through the front side of the treatment box (1) below the sealing plate (3), and the water inlet pipe (106) is higher than the height of the water pump pipe (201).
5. The waste gas treatment device for viscose-based carbon fiber production according to claim 4, characterized in that: The water pump (2) has a water outlet pipe (202) fixed at its outlet end. The water outlet pipe (202) is designed in an L shape. The horizontal part of the water outlet pipe (202) is located on the top of the treatment box (1) above the spray chamber (107). A branch pipe (502) is fixed through the upper part of the spray pipe (5). The top of the branch pipe (502) penetrates the top surface of the treatment box (1) and is connected through the horizontal part of the water outlet pipe (202).
6. The waste gas treatment device for viscose-based carbon fiber production according to claim 1, characterized in that: The inner wall of the treatment box (1) inside the spray chamber (107) is fixed with two sets of tracks (1071) distributed vertically. The two frames (302) are inserted into the tracks (1071) corresponding to their heights on both sides. The side of the sealing plate (3) away from the frame (302) is flush with the front side of the treatment box (1), and the side of the sealing plate (3) away from the frame (302) is fixed with two handles (301). Four pins (103) are fixed on the front side of the treatment box (1) outside the sealing plate (3), and a limit pin (1031) is rotatably connected to the pins (103).
7. The waste gas treatment device for viscose-based carbon fiber production according to claim 1, characterized in that: The processing box (1) inside the purification chamber (108) has two sets of horizontally parallel tracks (1081) fixed inside. The filter frame (4) passes through the front side of the filter box and is inserted into the corresponding track (1081). The front side of the filter frame (4) is flush with the front side of the processing box (1), and a base plate (401) is fixed on the front side of the filter frame (4). A handle (402) is fixed on the base plate (401). A pin (104) is fixed on the front side of the processing box (1) outside the filter frame (4), and a limit pin (1041) is rotatably connected on the pin (104).
8. The waste gas treatment device for viscose-based carbon fiber production according to claim 1, characterized in that: Three pressure gauges (105) are fixed on the top of the treatment box (1) above the purification chamber (108), and the probes of the pressure gauges (105) extend into the purification chamber (108). Pressure gauges (105) are installed on the top of the purification chamber (108) at both ends of each filter frame (4).