Hydrocyanic acid absorption and conversion device in acrylic fiber production process

Abstract

The utility model relates to the technical field of waste gas treatment equipment, in particular to a hydrocyanic acid absorption and conversion device in an acrylic fiber production process, which comprises a reaction tower body, a liquid discharge pipe communicated with the bottom end of the reaction tower body, an exhaust pipe communicated with the top end of the reaction tower body, and a spraying assembly arranged at the top end of the reaction tower body, the spraying assembly comprises a spraying frame fixedly mounted at the top end of the reaction tower body, and a plurality of spraying heads are uniformly arranged at the bottom end of the spraying frame in a communicating manner. According to the device, waste gas can be in full contact with absorption liquid, hydrocyanic acid in the waste gas can be converted into renewable substances, the filler main body on the filler bed can ensure that the waste gas is in full contact with reaction liquid, the contact area of the waste gas and the absorption liquid can be increased, and conversion of the hydrocyanic acid is facilitated; meanwhile, a new catalyst can be continuously and quantitatively guided into the through hole of the conveying pipe, the inactivated catalyst is discharged, the catalytic effect can be guaranteed, the recycling efficiency of hydrocyanic acid is improved, and pollution of hydrocyanic acid to the environment is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas treatment equipment technical field, specifically is a hydrogen cyanide absorption conversion device in acrylic fibre production process. BACKGROUND

[0002] Acrylic fibre generally refers to polyacrylonitrile fibre, and the performance of polyacrylonitrile fibre is extremely similar to that of wool, has better elasticity, the resilience can still keep 65% when elongating 20%, is fluffy and soft, and the warmth retention is 15% higher than that of wool, and is called synthetic wool, and hydrogen cyanide waste gas generated in the acrylic fibre production process has great toxicity and strong irritating smell, so its treatment has been one of the focuses in the industry, and the treatment of hydrogen cyanide not only relates to environmental protection, but also can effectively convert it into usable resources.

[0003] The current absorption conversion device can assist the conversion of hydrogen cyanide when the catalyst is used, but a large amount of catalyst is needed when a large amount of gas is treated, and the inactivated catalyst cannot improve the conversion effect, thereby affecting the conversion effect of hydrogen cyanide.

[0004] Therefore, a hydrogen cyanide absorption conversion device in acrylic fibre production process is provided. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a hydrogen cyanide absorption conversion device in acrylic fibre production process.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A hydrogen cyanide absorption conversion device in acrylic fibre production process, comprising: a reaction tower body, a liquid discharge pipe is communicated and arranged at the bottom end of the reaction tower body, an exhaust pipe is communicated and arranged at the top end of the reaction tower body, a spraying assembly is arranged at the top end of the reaction tower body, the spraying assembly comprises a spraying frame fixedly installed at the top end of the reaction tower body, a plurality of spraying heads are uniformly communicated and arranged at the bottom end of the spraying frame, and the plurality of spraying heads are annularly distributed, the spraying frame and the spraying heads are all made of stainless steel material, a material guide pipe is communicated and arranged on the side wall of the top end of the spraying frame, the material guide pipe extends to the outside of the side wall of the top end of the reaction tower body, and a catalytic assembly is further arranged on the reaction tower body, the catalytic assembly comprises a conveying pipe arranged between two filler beds, and the conveying pipe is perpendicular to the reaction tower body.

[0008] Preferably, an air inlet pipe is communicated and arranged on the side wall of the bottom end of the reaction tower body, and a fan is arranged in the air inlet pipe.

[0009] Preferably, two groups of filler beds are further arranged in the reaction tower body, and a filler main body is arranged in each of the two groups of filler beds.

[0010] Preferably, the height interval of the filler bed ranges from 0.8m to 1.2m.

[0011] Preferably, a rotating shaft is rotatably arranged in the conveying pipe, a motor is fixedly arranged on the side wall of the conveying pipe, the output end of the motor is fixedly connected with the central shaft of the rotating shaft, and helical conveying blades are fixedly arranged on the outer wall of the rotating shaft and tightly abut against the inner wall of the conveying pipe.

[0012] Preferably, a storage hopper is arranged at the top end of the conveying pipe and filled with catalyst.

[0013] Preferably, a plurality of through holes are uniformly arranged on the side wall of the conveying pipe in the reaction tower body.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] 1. The spray assembly is arranged, the prepared absorption liquid can be uniformly guided into the spray frame through the guide pipe, and the spray head at the bottom end of the spray frame is used for uniformly spraying the top end of the reaction tower body, so that the waste gas and the absorption liquid can be fully contacted, the hydrogen cyanide in the waste gas can be converted into renewable substances, the filler bodies on the filler bed can ensure that the waste gas and the reaction liquid are fully contacted, the contact area of the waste gas and the absorption liquid can be increased, the conversion of the hydrogen cyanide is facilitated, the spray head is made of stainless steel and has high corrosion resistance, the service life of the spray head can be prolonged, and the spraying effect is further ensured.

[0016] 2. The catalyst assembly is arranged, when the motor is powered, the motor can drive the rotating shaft to rotate in the conveying pipe, the catalyst in the storage hopper can continuously enter the conveying pipe and slide along the conveying pipe in the process of rotation of the helical conveying blades, the waste gas in the reaction tower body can be contacted with the catalyst when the catalyst moves to the through hole, the chemical conversion reaction of the hydrogen cyanide can be improved, the motor is intermittently operated, new catalyst can be continuously and quantitatively guided into the through hole of the conveying pipe, the inactivated catalyst can be discharged, the catalytic effect can be ensured, the recovery efficiency of the hydrogen cyanide can be improved, and the pollution of the hydrogen cyanide to the environment is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the reaction tower body of the utility model;

[0018] Figure 2 It is a cross section structure schematic view of the reaction tower body in the embodiment of the utility model;

[0019] Figure 3 It is a structure schematic view of the spray frame in the embodiment of the utility model;

[0020] Figure 4 It is the local section structure schematic view of the conveying pipe in the embodiment of the utility model.

[0021] In the figure: 1, reaction tower body; 2, liquid discharge pipe; 3, air inlet pipe; 4, material guide pipe; 5, exhaust pipe; 6, storage hopper; 7, motor; 8, conveying pipe; 9, filler bed; 10, filler main body; 11, fan; 12, spraying frame; 13, rotating shaft; 14, spraying head; 15, spiral material conveying blade; 16, through hole. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0023] In order to better understand the above technical scheme, the above technical scheme will be described in detail below in conjunction with the drawings in the description and specific embodiments.

[0024] Embodiment 1:

[0025] Please refer to Figures 1 to 3 A conversion device, comprising: reaction tower body 1, the bottom end of reaction tower body 1 is provided with liquid discharge pipe 2, the top end of reaction tower body 1 is provided with exhaust pipe 5, the top end of reaction tower body 1 is provided with spraying assembly, spraying assembly includes spraying frame 12 fixedly installed at the top end of reaction tower body 1, the bottom end of spraying frame 12 is uniformly provided with a plurality of spraying heads 14, and the plurality of spraying heads 14 are annularly distributed, spraying frame 12 and spraying head 14 are made of stainless steel material, the side wall on the top end of spraying frame 12 is provided with material guide pipe 4, and material guide pipe 4 extends to the outside of the side wall at the top end of reaction tower body 1.

[0026] Please refer to Figure 2 The side wall on the bottom end of reaction tower body 1 is provided with air inlet pipe 3, and fan 11 is arranged in air inlet pipe 3.

[0027] Please refer to Figure 2 Reaction tower body 1 is also provided with two groups of filler beds 9, and filler main body 10 is arranged in the two groups of filler beds 9.

[0028] Please refer to Figure 2 The height interval range of filler bed 9 is 0.8m to 1.2m.

[0029] In this embodiment, when in use, the prepared absorption liquid can be uniformly introduced into the spray frame 12 through the material guide pipe 4, and then uniformly sprayed on the top end of the reaction tower body 1 through the spray head 14 at the bottom end of the spray frame 12, which is used for continuously and uniformly spraying the solution into the reaction tower body 1, so that the waste gas can be fully contacted with the absorption liquid, the hydrogen cyanide in the waste gas can be converted into renewable substances, the filler bodies 10 on the filler beds 9 can ensure that the waste gas is fully contacted with the reaction liquid, the contact area of the waste gas and the absorption liquid can be increased, which is beneficial to the conversion of hydrogen cyanide, and since the spray head 14 is made of stainless steel material, the corrosion resistance is strong, the service life of the spray head 14 can be improved, and the spraying effect is further guaranteed.

[0030] Embodiment 2:

[0031] Please refer to Figures 1 to 4 The device for absorbing and converting hydrogen cyanide in the production process of acrylic fiber further comprises a catalytic assembly arranged on the reaction tower body 1, the catalytic assembly comprises a conveying pipe 8 arranged between the two filler beds 9, the conveying pipe 8 is perpendicular to the reaction tower body 1, a rotating shaft 13 is rotatably arranged in the conveying pipe 8, a motor 7 is fixedly arranged on the side wall of the conveying pipe 8, the output end of the motor 7 is fixedly connected with the central shaft of the rotating shaft 13, and a spiral conveying blade 15 is fixedly arranged on the outer wall of the rotating shaft 13 and tightly abuts against the inner wall of the conveying pipe 8.

[0032] Please refer to Figure 4 A storage hopper 6 is arranged at the top end of the conveying pipe 8, and the storage hopper 6 is filled with a catalyst.

[0033] Please refer to Figure 4 A plurality of through holes 16 are uniformly arranged on the side wall of the reaction tower body 1.

[0034] In this embodiment, when the motor 7 is powered on, the motor 7 can drive the rotating shaft 13 to rotate in the conveying pipe 8, at this time, the catalyst in the storage hopper 6 can continuously enter the conveying pipe 8 and slide along the conveying pipe 8 in the process of rotation of the spiral conveying blade 15, when the catalyst moves to the through hole 16, the waste gas in the reaction tower body 1 can be contacted with the catalyst, the chemical conversion reaction of hydrogen cyanide can be improved, the motor 7 can intermittently work, new catalyst can be continuously and quantitatively introduced into the through hole 16 of the conveying pipe 8, and the deactivated catalyst can be discharged, so that the catalytic effect can be guaranteed, the recovery efficiency of hydrogen cyanide can be improved, and the pollution of hydrogen cyanide to the environment can be reduced.

[0035] Working principle: first, the fan 11 in the intake pipe 3 hydrogen cyanide waste gas in the production process of acrylic fiber is sucked into the reaction tower body 1, hydrogen cyanide waste gas can continue to rise, at this time, through the guide pipe 4 will be mixed with the absorption liquid evenly into the spray stand 12, further through the spray head 14 at the bottom of the spray stand 12 evenly sprayed on the top of the reaction tower body 1, for continuous and uniform spray solution into the reaction tower body 1, can make the waste gas and absorption liquid contact, can make the hydrogen cyanide in the waste gas into renewable material, and the filler body 10 on the filler bed 9 can ensure that the waste gas and reaction liquid contact, can improve the contact area of waste gas and absorption liquid, conducive to the conversion of hydrogen cyanide, and because the spray head 14 is made of stainless steel material, corrosion resistance, can improve the service life of the spray head 14, further guarantee the spraying effect, in the reaction process, when the motor 7 is energized, the motor 7 can drive the rotating shaft 13 in the spiral conveying blade 15 rotates in the conveying pipe 8, at this time, the catalyst in the storage hopper 6 can enter the conveying pipe 8, and in the process of spiral conveying blade 15 rotation constantly along the conveying pipe 8 sliding, when the catalyst moves to the through hole 16, at this time, the waste gas in the reaction tower body 1 can contact with the catalyst, can improve the chemical conversion of hydrogen cyanide, by intermittent operation of the motor 7, can continuously quantitative new catalyst into the through hole 16 of the conveying pipe 8, the deactivated catalyst is discharged, can guarantee the catalytic effect, improve the recovery efficiency of hydrogen cyanide, reduce the pollution of hydrogen cyanide to the environment, the converted gas can be discharged through the exhaust pipe 5, and the used reaction liquid can be discharged along the liquid discharge pipe 2.

[0036] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A hydrocyanic acid absorption conversion device in an acrylic fiber production process, comprising: The utility model relates to a reaction tower body (1), its characterized in be that: reaction tower body (1) bottom end intercommunication is provided with drainage pipe (2), reaction tower body (1) top end intercommunication is provided with exhaust pipe (5), reaction tower body (1) top end is provided with spray subassembly, spray subassembly includes fixed mounting in the spray frame (12) of reaction tower body (1) top end, the bottom end of spray frame (12) is evenly provided with a plurality of shower nozzles (14) intercommunication, and a plurality of shower nozzles (14) are annular distribution, spray frame (12) and shower nozzle (14) are all made of stainless steel material, the sidewall on spray frame (12) top end is provided with guide pipe (4) intercommunication, guide pipe (4) extends to the sidewall outside reaction tower body (1) top end, reaction tower body (1) still is provided with catalytic subassembly, catalytic subassembly includes the conveying pipe (8) of setting between two filler beds (9), and conveying pipe (8) and reaction tower body (1) are perpendicular to each other.

2. A hydrocyanic acid absorption conversion device in an acrylic fiber production process according to claim 1, characterized in that: The sidewall on the bottom end of the reaction tower body (1) is provided with an air inlet pipe (3) in communication, and the air inlet pipe (3) is provided with a fan (11) therein.

3. A hydrocyanic acid absorption conversion device in an acrylic fiber production process according to claim 2, characterized in that: The reaction tower body (1) is further provided with two groups of filler beds (9), and each of the two groups of filler beds (9) is provided with a filler body (10).

4. The apparatus for absorbing and converting hydrocyanic acid in the production of acrylonitrile according to claim 3, characterized in that: The height range of the filler bed (9) is 0.8m to 1.2m.

5. The apparatus for absorbing and converting hydrocyanic acid in the production of acrylonitrile according to claim 1, characterized in that: The conveying pipe (8) is rotatably installed with a rotating shaft (13), the sidewall of the conveying pipe (8) is fixedly installed with a motor (7), the output end of the motor (7) is fixedly connected with the central shaft of the rotating shaft (13), the outer wall of the rotating shaft (13) is fixedly installed with a spiral conveying blade (15), and the outer wall of the spiral conveying blade (15) is tightly attached to the inner wall of the conveying pipe (8).

6. A hydrocyanation conversion apparatus for use in the production of acrylonitrile according to claim 5, wherein: The top end of the conveying pipe (8) is provided with a storage hopper (6) in communication, and the storage hopper (6) is filled with a catalyst.

7. A hydrocyanation conversion apparatus for use in the production of acrylonitrile according to claim 6, wherein: The sidewall of the conveying pipe (8) in the reaction tower body (1) is evenly provided with a plurality of through holes (16). The utility model relates to a reaction tower body (1), its characterized in be that: reaction tower body (1) bottom end intercommunication is provided with drainage pipe (2), reaction tower body (1) top end intercommunication is provided with exhaust pipe (5), reaction tower body (1) top end is provided with spray subassembly, spray subassembly includes fixed mounting in the spray frame (12) of reaction tower body (1) top end, the bottom end of spray frame (12) is evenly provided with a plurality of shower nozzles (14) intercommunication, and a plurality of shower nozzles (14) are annular distribution, spray frame (12) and shower nozzle (14) are all made of stainless steel material, the sidewall on spray frame (12) top end is provided with guide pipe (4) intercommunication, guide pipe (4) extends to the sidewall outside reaction tower body (1) top end, reaction tower body (1) still is provided with catalytic subassembly, catalytic subassembly includes the conveying pipe (8) of setting between two filler beds (9), and conveying pipe (8) and reaction tower body (1) are perpendicular to each other.

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