Waste gas recovery treatment equipment and method for polyamide 66 fiber production

Abstract

The invention belongs to the technical field of polyamide production, particularly relates to waste gas recovery treatment equipment and a waste gas recovery treatment method for polyamide 66 fiber production, and aims to solve the problem that when nitric oxide and ammonia water are heated by existing treatment equipment, generated steam is generally and directly discharged, so that resource waste is caused when the nitric oxide is treated. According to the technical scheme, the recycling treatment equipment comprises a treatment box, a cover plate is clamped to an opening in the top of the treatment box, a gas inlet pipe and a gas outlet pipe are fixedly installed on the cover plate in a penetrating mode, and the bottom end of the gas inlet pipe and the bottom end of the gas outlet pipe are fixedly provided with the same supporting disc. Therefore, the waste gas treatment efficiency can be effectively improved, and when the waste gas is treated, the generated steam can be stably output, so that the steam can be subsequently reutilized, the continuous utilization of energy can be improved, and the waste problem is avoided.

Description

Technical Field

[0001] This invention relates to the field of polyamide production technology, and in particular to a waste gas recovery and treatment device and method for polyamide 66 fiber production. Background Technology

[0002] Polyamide 66 fiber, also known as polyhexamethylene adipamide fiber or nylon 66, is one of the main varieties of aliphatic polyamide fibers. The production process of polyamide 66 fiber may generate various waste gases, including carbon dioxide, ammonia, nitrogen oxides, and volatile organic compounds (VOCs). Nitrogen oxides (NOx) are toxic gases that pose significant risks to human health and the environment. Catalytic reduction is a highly efficient waste gas treatment technology for NOx. Catalytic reduction utilizes a reducing gas, under the action of a catalyst, to reduce NOx into nitrogen (N2) and water (H2O), thus achieving a harmless treatment method. In this process, the catalyst lowers the activation energy of the reaction, accelerating the chemical reaction rate between the reducing agent and NOx. Ammonia is typically used as the reducing agent; nitrogen oxides are mixed into the ammonia solution, and then, under high temperature, the nitrogen oxides decompose into ammonia and water.

[0003] However, current treatment equipment typically discharges steam directly when heating nitrogen oxides and ammonia, resulting in resource waste during nitrogen oxide treatment. Therefore, we propose a waste gas recovery and treatment equipment and method for polyamide 66 fiber production to solve the aforementioned problems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technology where the steam generated during the heating of nitrogen oxides and ammonia is generally directly discharged, resulting in resource waste during the treatment of nitrogen oxides. Therefore, this invention proposes a waste gas recovery and treatment device and method for polyamide 66 fiber production.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A waste gas recovery and treatment device for polyamide 66 fiber production includes a treatment box. A cover plate is fitted onto the top opening of the treatment box. An inlet pipe and an outlet pipe are respectively fixedly installed through the cover plate. The bottom ends of the inlet pipe and the outlet pipe are fixedly installed with the same support plate. The support plate is located inside the treatment box and slides against the inner wall of the treatment box. Multiple electric push rods are fixedly installed at equal intervals on the bottom inner wall of the side of the treatment box. The output shaft of the electric push rod is fixedly connected to the bottom of the support plate. An electric heating plate is fixedly installed on the bottom inner wall of one side of the treatment box. The waste gas recovery and treatment device also includes:

[0007] The air intake mechanism and the air exhaust mechanism are symmetrically installed on the top of the cover plate. The top of the air intake pipe and the top of the air exhaust pipe are respectively connected to the air intake mechanism and the air exhaust mechanism. The same power mechanism is connected to the air intake mechanism and the air exhaust mechanism, and the power mechanism is installed on the top of the cover plate.

[0008] The support mechanism is installed on the bottom inner wall of the processing box. The top of the support mechanism extends above the support plate and connects with the top of the support plate. Two reaction mechanisms are symmetrically installed on the support mechanism, and the two reaction mechanisms correspond to the positions of the air inlet pipe and the air outlet pipe, respectively.

[0009] In one possible design, the air intake mechanism includes a first power box fixedly installed on one side of the top of the cover plate, a first piston plate being slidably connected inside the first power box, a second one-way valve being fixedly installed through the first piston plate, the first one-way valve being fixedly installed at the air inlet end of the first power box, the top end of the air intake pipe extending into the first power box and being fixedly connected to the bottom inner wall of the first power box, and one end of the power mechanism extending into the first power box and being connected to one side of the first piston plate.

[0010] In one possible design, the venting mechanism includes a second power box fixedly installed on the other side of the top of the cover plate. A second piston plate is slidably connected inside the second power box. The other end of the power mechanism extends into the second power box and is connected to one side of the second piston plate. A fourth one-way valve is fixedly installed through the second piston plate. The top end of the venting pipe extends into the second power box and is fixedly connected to the inner wall of one side of the bottom of the second power box. A third one-way valve is fixedly installed inside the venting pipe.

[0011] In one possible design, the power mechanism includes a transmission rod, with both ends extending into a first power box and a second power box respectively and fixedly connected to a first piston plate and a second piston plate respectively. The transmission rod is slidably and sealingly connected to one side of the inner wall of the first power box and one side of the inner wall of the second power box respectively. A mounting plate located between the first power box and the second power box is fixedly installed on the top of the cover plate. The transmission rod passes through the mounting plate. A reciprocating screw is fixedly sleeved on the transmission rod. A slip ring that mates with the threaded groove of the reciprocating screw is sleeved on the reciprocating screw. The slip ring is rotatably connected to one side of the mounting plate. A drive assembly is installed on one side of the top of the cover plate. The drive assembly is connected to the slip ring.

[0012] In one possible design, the drive assembly includes a drive motor fixedly mounted on one side of the top of the cover plate, a drive gear fixedly mounted on the output shaft of the drive motor, and a driven gear fixedly sleeved on the slip ring, with the drive gear meshing with the driven gear.

[0013] In one possible design, the support mechanism includes a support shaft rotatably connected to the inner wall of the bottom of the processing tank, a bracket fixedly sleeved on the support shaft, and two support frames symmetrically fixedly installed on the top of the bracket, the support frames being used to support the reaction mechanism.

[0014] In one possible design, the support mechanism further includes a stepper motor fixedly mounted on the support plate. The output shaft of the stepper motor passes through the support plate and is fixedly mounted with a drive shaft. A rectangular clamping plate is fixedly mounted at the bottom end of the drive shaft, and a rectangular clamping cover is fixedly mounted at the top end of the support shaft. The rectangular clamping plate and the rectangular clamping cover are engaged with each other.

[0015] In one possible design, the reaction mechanism includes a reaction chamber mounted on a corresponding bracket. A support cover is fixedly installed at the top opening of the reaction chamber. A movable cover is slidably connected through the bottom inner wall of the support cover. Multiple exhaust holes are evenly spaced on the side inner wall of the movable cover. A second magnetic ring is fixedly installed at the top of the movable cover. A first magnetic ring is fixedly installed at the bottom end of the air inlet pipe. The first magnetic ring and the second magnetic ring are attracted to each other. A gas supply pipe is fixedly installed through the bottom inner wall of the movable cover. The bottom end of the gas supply pipe extends into the reaction chamber and is fixedly installed with a flow divider. A baffle is fixedly installed at the bottom of the support cover. The movable cover passes through the baffle and is tightly slidably connected to the inner wall of the baffle. Multiple flow holes are evenly spaced on the inner wall of the baffle.

[0016] In one possible design, a compression spring is fitted onto the baffle tube, with the top and bottom ends of the compression spring fixedly connected to the bottom of the support cover and the movable cover, respectively. The elastic force of the compression spring is smaller than the magnetic force between the first and second magnet rings and the steam pressure generated inside the reaction chamber.

[0017] A method for using a waste gas recovery and treatment device for polyamide fiber production includes the following steps:

[0018] S1. Reaction box installation and equipment sealing: First, pour an appropriate amount of ammonia into the two reaction boxes and place the reaction boxes on the corresponding brackets. Then, start multiple electric push rods to move the support plate down into the processing box, so that the cover plate is engaged with the processing box. At this time, under the attraction of the first magnetic ring, the moving cover corresponding to the air inlet pipe moves up until the second magnetic ring is aligned with the first magnetic ring.

[0019] S2. Start-up and reciprocating motion establishment of the power mechanism: The start-up drive motor drives the drive gear to rotate, which drives the slip ring to rotate through the driven gear, and then drives the transmission rod to perform lateral reciprocating motion through the reciprocating screw;

[0020] S3. Exhaust gas intake and push process: The transmission rod drives the first piston plate to reciprocate laterally in the first power box; when the second one-way valve approaches the first one-way valve, the gas is compressed and passes through the second one-way valve; when the second one-way valve moves away from the first one-way valve, the negative pressure causes the first one-way valve to open, and the exhaust gas is drawn into the first power box; then the first piston plate moves in the opposite direction, pushing the exhaust gas into the reaction chamber through the gas delivery pipe and the distribution plate;

[0021] S4. Reactor Switching and Steam Treatment: After injecting sufficient waste gas into the reaction chamber, start the stepper motor to drive the bracket to rotate 180° via the drive shaft, switching the reaction chamber position; move the reaction chamber filled with waste gas above the electric heating plate and turn on the power to heat it. After the ammonia boils, the steam pushes the moving hood upward, so that the exhaust port and the flow port are connected, and the steam is discharged through the gas outlet pipe; at the same time, the second piston plate reciprocates under the drive of the transmission rod: when the pressure is negative, the third one-way valve opens to draw in steam, and when the pressure is increased, the fourth one-way valve opens to discharge steam to the external pipeline; the moving hood connected to the gas inlet pipe continuously transports waste gas under the magnetic attraction, realizing the circulation treatment.

[0022] In this invention, the raw material elevator for processing, through the air intake mechanism, can reciprocate laterally along the inner wall of the first power box after the first piston plate receives the driving force of the power mechanism. At this time, when the second one-way valve approaches the first one-way valve, it can compress the gas between the first one-way valve and the first piston plate. At this time, the valve core of the second one-way valve will move under the action of air pressure, so that the second one-way valve is in the open state, allowing gas to pass through the second one-way valve. When the second one-way valve moves away from the first one-way valve, a negative pressure state will be formed in the area between the first one-way valve and the second one-way valve. The valve core of the first one-way valve will move under the action of negative pressure, so that the first one-way valve is in a stressed state. Therefore, after connecting the air inlet of the first power box to the exhaust gas conveying pipe, exhaust gas can be sucked into the first power box. And when the first piston plate moves away from the first one-way valve, the exhaust gas passing through the second one-way valve can be pushed into the air intake pipe, thereby stably delivering the exhaust gas to the reaction mechanism.

[0023] In this invention, the raw material elevator for processing, through the air outlet mechanism, allows the second piston plate to reciprocate laterally within the second power box under the driving force of the power mechanism. When the second piston plate moves away from the air outlet pipe, the space between them increases, creating a negative pressure state. At this time, the valve core of the third one-way valve moves under the negative pressure, thus opening the third one-way valve. When heating the nitrogen oxides, the generated steam can be drawn into the second power box. When the second piston plate moves into the air outlet pipe, it suppresses the steam in the second power box, which in turn squeezes the valve core of the fourth one-way valve, opening the fourth one-way valve. Therefore, after connecting the air outlet of the second power box to an external steam pipe, the generated steam can be discharged for reuse.

[0024] In this invention, the raw material elevator for processing can drive the slip ring to rotate through the power mechanism by starting the drive assembly. At this time, under the transmission action with the reciprocating screw, the reciprocating screw can be driven to perform lateral reciprocating motion, thereby driving the transmission rod to perform lateral reciprocating motion, which can conveniently drive the first piston plate and the second piston plate to perform lateral reciprocating motion.

[0025] In this invention, the raw material elevator for processing, through a support mechanism, allows two reaction mechanisms to be placed on corresponding support frames, with the two support frames corresponding to the inlet pipe and outlet pipe respectively. The reaction mechanism corresponding to the outlet pipe position can be heated and baked by the heating plate, so waste gas can be injected into the reaction mechanism at the same time, and the corresponding reaction mechanism can be heated by the heating plate. Furthermore, the support shaft can rotate, so the positions of the two reaction mechanisms can be switched easily, so that the waste gas can be heated and reacted alternately.

[0026] By starting the stepper motor to drive the drive shaft to rotate 180°, the bracket can be rotated synchronously, which can switch the position of the two reaction mechanisms. The two switching mechanisms can be moved above the heating plate, so that the two switching mechanisms can receive waste gas or be heated in a cycle, thereby improving the waste gas treatment efficiency.

[0027] In this invention, the raw material elevator for processing, through a reaction mechanism, allows the two reaction chambers to be moved to positions corresponding to the inlet and outlet pipes, respectively. At this time, the second magnetic ring, corresponding to the first magnetic ring, can be driven upward by the attraction force, causing multiple exhaust holes to align with the flow holes until the first and second magnetic rings are attracted together. Therefore, the waste gas that can enter the inlet pipe can be dispersed into the ammonia water in the reaction chamber through the moving hood, the gas delivery pipe, and the distribution plate. Furthermore, the reaction chamber located above the heating plate can be heated by the heat from the heating plate, which can heat the mixture of ammonia water and waste gas until the ammonia water boils, forming a large amount of steam in the reaction chamber. At this time, the moving hood moves upward, and the multiple exhaust holes align with the flow holes, allowing the steam to flow into the moving hood through the exhaust holes and flow holes, and then be discharged through the outlet pipe, thus enabling a stable output of steam.

[0028] This invention enables the alternating and cyclical treatment of waste gas, thereby effectively improving the waste gas treatment efficiency. Furthermore, during the waste gas treatment process, the generated steam can be stably output for subsequent reuse, thus enhancing the sustainable use of energy and avoiding waste. Attached Figure Description

[0029] Figure 1 This is a three-dimensional first-view structural diagram of a waste gas recovery and treatment device for polyamide 66 fiber production proposed in this invention.

[0030] Figure 2 This is a three-dimensional schematic diagram of the overall second-view structure of a waste gas recovery and treatment device for polyamide 66 fiber production proposed in this invention.

[0031] Figure 3 This is a three-dimensional schematic diagram of the internal structure of a waste gas recovery and treatment device for polyamide 66 fiber production proposed in this invention;

[0032] Figure 4 This is a three-dimensional schematic diagram of the cover plate, support plate, and multiple electric cylinder connection structure of a waste gas recovery and treatment device for polyamide 66 fiber production proposed in this invention.

[0033] Figure 5 This is a three-dimensional cross-sectional schematic diagram of the reaction chamber structure of a waste gas recovery and treatment device for polyamide 66 fiber production proposed in this invention;

[0034] Figure 6 This is a top-view three-dimensional schematic diagram of the internal structure of the treatment box of a waste gas recovery and treatment device for polyamide 66 fiber production proposed in this invention;

[0035] Figure 7This is a three-dimensional schematic diagram of the drive motor, transmission rod, first piston plate, and second piston plate connection structure of a waste gas recovery and treatment device for polyamide 66 fiber production proposed in this invention.

[0036] Figure 8 This is a front-view structural cross-sectional diagram of a waste gas recovery and treatment device for polyamide 66 fiber production proposed in this invention.

[0037] In the diagram: 1. Processing box; 2. Cover plate; 3. Inlet pipe; 4. Outlet pipe; 5. Support plate; 6. Electric push rod; 7. First magnetic ring; 8. Stepper motor; 9. Drive shaft; 10. Rectangular clamping plate; 11. Support shaft; 12. Rectangular clamping cover; 13. Bracket; 14. Support frame; 15. Reaction box; 16. Support cover; 17. Moving cover; 18. Exhaust port; 19. Second magnetic ring; 20. Compression spring; 21. Heating plate; 2. First power box; 23. Second power box; 24. First piston plate; 25. Second piston plate; 26. Transmission rod; 27. First check valve; 28. Second check valve; 29. ​​Third check valve; 30. Fourth check valve; 31. Mounting plate; 32. Slip ring; 33. Driven gear; 34. Drive motor; 35. Drive gear; 36. Reciprocating screw; 37. Air supply pipe; 38. Diverter plate; 39. Baffle pipe; 40. Flow hole. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0039] Example 1: Refer to Figure 1-8 A recycling and processing device is disclosed, comprising a processing box 1. A cover plate 2 is fitted onto the top opening of the processing box 1, and an inlet pipe 3 and an outlet pipe 4 are respectively fixedly installed through the cover plate 2. The bottom ends of the inlet pipe 3 and the outlet pipe 4 are fixedly mounted on the same support plate 5, which is located inside the processing box 1 and slides against the inner wall of the processing box 1. Multiple electric push rods 6 are fixedly installed at equal intervals on the bottom inner wall of the side of the processing box 1. The output shafts of the electric push rods 6 are fixedly connected to the bottom of the support plate 5, so as to push the support plate 5 up and down within the processing box 1. An electric heating plate 21 is fixedly installed on the bottom inner wall of the processing box 1 for heating the waste gas.

[0040] The waste gas recovery and treatment equipment also includes an air inlet mechanism and an air outlet mechanism, which are symmetrically installed on the top of the cover plate 2. The top ends of the air inlet pipe 3 and the air outlet pipe 4 are respectively connected to the air inlet mechanism and the air outlet mechanism. The same power mechanism is connected to the air inlet mechanism and the air outlet mechanism, which is also installed on the top of the cover plate 2.

[0041] The specific structure of the intake mechanism is as follows: A first power box 22 is fixedly installed on one side of the top of the cover plate 2, and a first piston plate 24 is slidably connected inside the first power box 22. A second one-way valve 28 is fixedly installed through the first piston plate 24, and a first one-way valve 27 is fixedly installed at the air receiving end of the first power box 22. The top end of the intake pipe 3 extends into the first power box 22 and is fixedly connected to the bottom inner wall of the first power box 22. One end of the power mechanism extends into the first power box 22 and is connected to one side of the first piston plate 24. When the first piston plate 24 receives the driving force of the power mechanism, it can move laterally back and forth along the inner wall of the first power box 22. At this time, when the second one-way valve 28 approaches the first one-way valve 27, it can compress the gas between the first one-way valve 27 and the first piston plate 24, causing the valve core of the second one-way valve 28 to open, and the gas enters the intake pipe 3 through the second one-way valve 28. When the second check valve 28 moves away from the first check valve 27, a negative pressure is formed in the area between the first check valve 27 and the second check valve 28. The valve core of the first check valve 27 opens, drawing exhaust gas into the first power box 22. Subsequently, when the first piston plate 24 moves away from the first check valve 27, it pushes the exhaust gas into the intake pipe 3.

[0042] The specific structure of the gas outlet mechanism is as follows: A second power box 23 is fixedly installed on the other side of the top of the cover plate 2, and a second piston plate 25 is slidably connected inside the second power box 23. The other end of the power mechanism extends into the second power box 23 and is connected to one side of the second piston plate 25. A fourth one-way valve 30 is fixedly installed through the second piston plate 25, and the top end of the gas outlet pipe 4 extends into the second power box 23 and is fixedly connected to the inner wall of one side of the bottom of the second power box 23. A third one-way valve 29 is fixedly installed inside the gas outlet pipe 4. When the second piston plate 25 moves away from the gas outlet pipe 4 under the drive of the power mechanism, a negative pressure is formed inside the second power box 23, the third one-way valve 29 opens, and the steam generated by the reaction is drawn into the second power box 23. When the second piston plate 25 moves towards the gas outlet pipe 4, it suppresses the steam, causing the fourth one-way valve 30 to open and discharge the steam.

[0043] The specific structure of the power mechanism is as follows: the two ends of the transmission rod 26 extend into the first power box 22 and the second power box 23 respectively, and are fixedly connected to the first piston plate 24 and the second piston plate 25 respectively. The transmission rod 26 is slidably and sealed to the inner walls of the first power box 22 and the second power box 23 respectively. A mounting plate 31 is fixedly installed on the top of the cover plate 2, and the transmission rod 26 passes through the mounting plate 31. A reciprocating screw 36 is fixedly sleeved on the transmission rod 26, and a slip ring 32 is sleeved on the reciprocating screw 36. The slip ring 32 is rotatably connected to one side of the mounting plate 31. A drive motor 34 is installed on one side of the top of the cover plate 2. A drive gear 35 is fixedly installed on the output shaft of the drive motor 34, and a driven gear 33 is fixedly sleeved on the slip ring 32. The drive gear 35 and the driven gear 33 mesh with each other. By starting the drive motor 34, the driving gear 35 is rotated, which in turn drives the driven gear 33 and the slip ring 32 to rotate, which in turn drives the reciprocating screw 36 and the transmission rod 26 to reciprocate laterally, thereby realizing the reciprocating lateral motion of the first piston plate 24 and the second piston plate 25.

[0044] The specific structure of the support mechanism is as follows: A support shaft 11 is rotatably connected to the inner wall of the bottom of the processing tank 1, and a bracket 13 is fixedly sleeved on the support shaft 11. Two support frames 14 are symmetrically fixedly installed on the top of the bracket 13 to support the reaction mechanism. A stepper motor 8 is fixedly installed on the support plate 5. The output shaft of the stepper motor 8 passes through the support plate 5 and a drive shaft 9 is fixedly installed thereon. A rectangular clamping plate 10 is fixedly installed at the bottom end of the drive shaft 9. A rectangular clamping cover 12 is fixedly installed at the top end of the support shaft 11, and the rectangular clamping plate 10 is engaged with the rectangular clamping cover 12. By starting the stepper motor 8, the drive shaft 9 and the rectangular clamping plate 10 are rotated 180°, thereby causing the reaction mechanism on the bracket 13 and the support frame 14 to switch positions.

[0045] This application can be used in the field of polyamide production technology, or in other fields applicable to this application.

[0046] Example 2: Reference Figure 3 and 5Based on Example 1, an improvement is made to a waste gas recovery and treatment device for polyamide 66 fiber production, which is applied to the field of polyamide production technology. The specific structure of the reaction mechanism is as follows: a reaction chamber 15 is mounted on a bracket 13, and a support cover 16 is fixedly installed at the top opening of the reaction chamber 15. A movable cover 17 is slidably connected through the bottom inner wall of the support cover 16, and multiple exhaust holes 18 are evenly spaced on the side inner wall of the movable cover 17. A second magnetic ring 19 is fixedly installed at the top of the movable cover 17, and a first magnetic ring 7 is fixedly installed at the bottom end of the air inlet pipe 3. The first magnetic ring 7 and the second magnetic ring 19 are attracted to each other. A gas supply pipe 37 is fixedly installed through the bottom inner wall of the movable cover 17, and the bottom end of the gas supply pipe 37 extends into the reaction chamber 15 and is fixedly installed with a diverter plate 38. A baffle pipe 39 is fixedly installed at the bottom of the support cover 16, and the movable cover 17 passes through the baffle pipe 39 and is tightly slidably connected to the inner wall of the baffle pipe 39. Multiple flow holes 40 are evenly spaced on the inner wall of the baffle pipe 39. A compression spring 20 is fitted onto the baffle pipe 39, with its top and bottom ends fixedly connected to the bottom of the support cover 16 and the movable cover 17, respectively. When the reaction chamber 15 moves to the position corresponding to the inlet pipe 3, the first magnetic ring 7 and the second magnetic ring 19 attract each other, causing the movable cover 17 to move upward, so that the exhaust port 18 corresponds to the position of the flow holes 40. The waste gas enters the ammonia water in the reaction chamber 15 through the inlet pipe 3, the movable cover 17, the gas delivery pipe 37, and the distribution plate 38. When the reaction chamber 15 moves above the heating plate 21, the mixture of ammonia water and waste gas is heated to boiling, forming steam. The steam enters the movable cover 17 through the exhaust port 18 and the flow holes 40, and is then discharged through the outlet pipe 4.

[0047] During operation, the two reaction chambers 15 are first placed on the support frames 14, with the support frames 14 corresponding to the inlet pipe 3 and the outlet pipe 4, respectively. The drive motor 34 is started, driving the first piston plate 24 and the second piston plate 25 to reciprocate laterally via the power mechanism, achieving the intake of exhaust gas and the discharge of steam. Simultaneously, the heating plate 21 is activated to heat the reaction chamber 15 located above it. The stepper motor 8 drives the bracket 13 and the reaction chamber 15 to switch positions, achieving alternating heating and reaction of the exhaust gas. The steam generated by the reaction is discharged through the outlet pipe 4 for reuse. When moving the reaction chamber 15, the first magnetic ring 7 disengages from the second magnetic ring 19, and the compression spring 20 pushes the moving cover 17 downwards to prevent exhaust gas leakage.

[0048] This invention proposes a method for using a waste gas recovery and treatment device for polyamide 66 fiber production, comprising the following steps:

[0049] S1. First, pour an appropriate amount of ammonia into the two reaction chambers 15 and place the two reaction chambers 15 on the corresponding brackets 13. Then, start multiple electric push rods 6 to move the support plate 5 into the processing chamber 1 and make the cover plate 2 engage with the processing chamber 1. At this time, under the attraction of the first magnetic ring 7, the movable cover 17 corresponding to the position of the air inlet pipe 3 can be moved upward until the second magnetic ring 19 corresponds to the position of the first magnetic ring 7.

[0050] S2. Start the drive motor 34 to drive the drive gear 35 to rotate. At this time, under the meshing transmission action with the driven gear 33, it can drive the slip ring 32 to rotate, so that the slip ring 32 can be stably transmitted and rotated. At this time, under the transmission action with the reciprocating screw 36, it can drive the reciprocating screw 36 to perform lateral reciprocating motion, thereby driving the transmission rod 26 to perform lateral reciprocating motion.

[0051] S3. After the first piston plate 24 receives the driving force from the transmission rod 26, it can reciprocate laterally along the inner wall of the first power box 22. At this time, when the second one-way valve 28 approaches the first one-way valve 27, it can compress the gas between the first one-way valve 27 and the first piston plate 24. At this time, the valve core of the second one-way valve 28 will move under the action of the gas pressure, so that the second one-way valve 28 can be in the open state, that is, the gas can pass through the second one-way valve 28. When the second one-way valve 28 moves away from the first one-way valve 27, the first one-way valve 27 and the second one-way valve 28 will reciprocate laterally. A negative pressure state will be formed in the area between the valves 28. The valve core of the first check valve 27 will move under the action of the negative pressure, so that the first check valve 27 is under force. Therefore, after the air inlet of the first power box 22 is connected to the exhaust gas conveying pipe, the exhaust gas can be drawn into the first power box 22. When the first piston plate 24 moves away from the first check valve 27, the exhaust gas through the second check valve 28 can be pushed into the air inlet pipe 3. Then the exhaust gas can be dispersed and conveyed into the reaction tank 15 by the gas conveying pipe 37 and the diverter plate 38, and the exhaust gas is integrated into the ammonia water.

[0052] S4. After injecting sufficient waste gas into the reaction chamber 15, the stepper motor 8 is started to drive the transmission shaft 9 to rotate 180°. This drives the bracket 13 to rotate synchronously, allowing the positions of the two reaction chambers 15 to be switched. The reaction chamber 15 filled with waste gas is moved above the heating plate 21. The heating plate 21 is then energized to heat the reaction chamber 15 until the ammonia water boils, forming a large amount of steam inside the reaction chamber 15. At this time, the moving cover 17 moves upward, and the multiple exhaust holes 18 correspond to the positions of the flow holes 40, allowing the steam to flow into the exhaust pipe 4 through the exhaust holes 18, the flow holes 40, and the moving cover 17. At this time, the second piston plate 25, driven by the transmission rod 26, can perform lateral reciprocating motion in the second power box 23. When the second piston plate 25 moves away from the exhaust pipe 4, the space between the two will change. When the pressure is high, a negative pressure state is formed. At this time, the valve core of the third one-way valve 29 will move under the action of the negative pressure, so that the third one-way valve 29 is in the open state. When the nitrogen oxides are heated and reacted, the generated steam can be drawn into the second power box 23. When the second piston plate 25 moves into the outlet pipe 4, it will suppress the steam in the second power box 23. The steam can then squeeze the valve core of the fourth one-way valve 30, so that the fourth one-way valve 30 is in the open state. Therefore, after connecting the outlet end of the second power box 23 to the external steam pipe, the generated steam can be discharged so that the steam output can be reused. The movable cover 17 connected to the inlet pipe 3 can continue to transport the waste gas into the reaction box 15 under the attraction of the first magnetic ring 7 and the second magnetic ring 19, so as to realize the recycling treatment of waste gas.

[0053] However, as is well known to those skilled in the art, the working principles and wiring methods of the electric push rod 6, stepper motor 8, heating plate 21 and drive motor 34 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A waste gas recovery and treatment device for polyamide 66 fiber production, comprising a treatment box (1), a cover plate (2) is fitted at the top opening of the treatment box (1), an inlet pipe (3) and an outlet pipe (4) are respectively fixedly installed through the cover plate (2), the bottom ends of the inlet pipe (3) and the bottom ends of the outlet pipe (4) are fixedly installed with the same support plate (5), the support plate (5) is located inside the treatment box (1) and slides in cooperation with the inner wall of the treatment box (1), a plurality of electric push rods (6) are fixedly installed at equal intervals on the bottom inner wall of the side of the treatment box (1), the output shaft of the electric push rod (6) is fixedly connected to the bottom of the support plate (5), and an electric heating plate (21) is fixedly installed on the bottom inner wall of one side of the treatment box (1), characterized in that, The waste gas recovery and treatment device also includes: The air intake mechanism and the air outlet mechanism are symmetrically installed on the top of the cover plate (2). The top end of the air intake pipe (3) and the top end of the air outlet pipe (4) are respectively connected to the air intake mechanism and the air outlet mechanism. The air intake mechanism and the air outlet mechanism are connected to the same power mechanism, which is installed on the top of the cover plate (2). The support mechanism is installed on the bottom inner wall of the processing box (1). The top of the support mechanism extends above the support plate (5) and is connected to the top of the support plate (5). Two reaction mechanisms are symmetrically installed on the support mechanism, and the two reaction mechanisms correspond to the positions of the air inlet pipe (3) and the air outlet pipe (4) respectively.

2. The waste gas recovery and treatment equipment for polyamide 66 fiber production according to claim 1, characterized in that, The air intake mechanism includes a first power box (22) fixedly installed on one side of the top of the cover plate (2), a first piston plate (24) is slidably connected inside the first power box (22), a second one-way valve (28) is fixedly installed through the first piston plate (24), a first one-way valve (27) is fixedly installed at the air receiving end of the first power box (22), the top end of the air intake pipe (3) extends into the first power box (22) and is fixedly connected to the bottom inner wall of the first power box (22), and one end of the power mechanism extends into the first power box (22) and is connected to one side of the first piston plate (24).

3. The waste gas recovery and treatment equipment for polyamide 66 fiber production according to claim 1, characterized in that, The air outlet mechanism includes a second power box (23) fixedly installed on the other side of the top of the cover plate (2). A second piston plate (25) is slidably connected inside the second power box (23). The other end of the power mechanism extends into the second power box (23) and is connected to one side of the second piston plate (25). A fourth one-way valve (30) is fixedly installed through the second piston plate (25). The top end of the air outlet pipe (4) extends into the second power box (23) and is fixedly connected to the inner wall of the bottom side of the second power box (23). A third one-way valve (29) is fixedly installed inside the air outlet pipe (4).

4. The waste gas recovery and treatment equipment for polyamide 66 fiber production according to claim 1, characterized in that, The power mechanism includes a transmission rod (26), with both ends of the transmission rod (26) extending into the first power box (22) and the second power box (23) respectively and fixedly connected to the first piston plate (24) and the second piston plate (25) respectively. The transmission rod (26) is sealed and slidably connected to the inner wall of one side of the first power box (22) and the inner wall of one side of the second power box (23) respectively. The top of the cover plate (2) is fixedly installed with a mounting plate (31) located between the first power box (22) and the second power box (23). The transmission rod (26) passes through the mounting plate (31). A reciprocating screw (36) is fixedly sleeved on the transmission rod (26). A slip ring (32) that cooperates with the thread groove of the reciprocating screw (36) is sleeved on the reciprocating screw (36). The slip ring (32) is rotatably connected to one side of the mounting plate (31). A drive assembly is installed on one side of the top of the cover plate (2). The drive assembly is connected to the slip ring (32).

5. The waste gas recovery and treatment equipment for polyamide 66 fiber production according to claim 4, characterized in that, The drive assembly includes a drive motor (34) fixedly installed on one side of the top of the cover plate (2). A drive gear (35) is fixedly installed on the output shaft of the drive motor (34), and a driven gear (33) is fixedly sleeved on the slip ring (32). The drive gear (35) meshes with the driven gear (33).

6. The waste gas recovery and treatment equipment for polyamide 66 fiber production according to claim 1, characterized in that, The supporting mechanism includes a support shaft (11) rotatably connected to the inner wall of the bottom of the processing box (1). A bracket (13) is fixedly sleeved on the support shaft (11). Two support frames (14) are symmetrically fixedly installed on the top of the bracket (13). The support frames (14) are used to support the reaction mechanism.

7. The waste gas recovery and treatment equipment for polyamide 66 fiber production according to claim 1, characterized in that, The supporting mechanism also includes a stepper motor (8) fixedly installed on the support plate (5). The output shaft of the stepper motor (8) passes through the support plate (5) and is fixedly installed with a transmission shaft (9). A rectangular clamping plate (10) is fixedly installed at the bottom end of the transmission shaft (9), and a rectangular clamping cover (12) is fixedly installed at the top end of the support shaft (11). The rectangular clamping plate (10) and the rectangular clamping cover (12) are clamped together.

8. The waste gas recovery and treatment equipment for polyamide 66 fiber production according to claim 1, characterized in that, The reaction mechanism includes a reaction chamber (15) mounted on a corresponding bracket (13). A support cover (16) is fixedly installed at the top opening of the reaction chamber (15). A movable cover (17) is slidably connected through the bottom inner wall of the support cover (16). Multiple exhaust holes (18) are evenly spaced on the side inner wall of the movable cover (17). A second magnetic ring (19) is fixedly installed at the top of the movable cover (17). A first magnetic ring (7) is fixedly installed at the bottom end of the air inlet pipe (3). The magnet ring (7) attracts the second magnet ring (19). A gas supply pipe (37) is fixedly installed through the bottom inner wall of the movable cover (17). The bottom end of the gas supply pipe (37) extends into the reaction chamber (15) and is fixedly installed with a flow divider (38). A baffle (39) is fixedly installed at the bottom of the support cover (16). The movable cover (17) passes through the baffle (39) and is tightly slidably connected to the inner wall of the baffle (39). Multiple flow holes (40) are opened at equal intervals on the inner wall of the baffle (39).

9. The waste gas recovery and treatment equipment for polyamide 66 fiber production according to claim 8, characterized in that, A compression spring (20) is fitted on the baffle (39). The top and bottom ends of the compression spring (20) are fixedly connected to the bottom of the support cover (16) and the movable cover (17), respectively. The elastic force of the compression spring (20) is smaller than the magnetic force between the first magnet ring (7) and the second magnet ring (19) and the steam pressure formed in the reaction chamber (15).

10. A method of using the waste gas recovery and treatment equipment for polyamide 66 fiber production according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Installation and sealing of reaction chambers: First, pour an appropriate amount of ammonia into the two reaction chambers (15) and place the reaction chambers (15) on the corresponding brackets (13). Then, start multiple electric push rods (6) to drive the support plate (5) to move down into the processing chamber (1) so that the cover plate (2) is engaged with the processing chamber (1). At this time, under the attraction of the first magnetic ring (7), the moving cover (17) corresponding to the air inlet pipe (3) moves up until the second magnetic ring (19) is aligned with the position of the first magnetic ring (7). S2, Start-up of power mechanism and establishment of reciprocating motion: Start-up drive motor (34) drives the drive gear (35) to rotate, drives the slip ring (32) to rotate through the driven gear (33), and then drives the transmission rod (26) to perform lateral reciprocating motion through the reciprocating screw (36); S3. Exhaust gas intake and push process: The transmission rod (26) drives the first piston plate (24) to move laterally back and forth in the first power box (22); when the second one-way valve (28) approaches the first one-way valve (27), the gas is squeezed and passes through the second one-way valve (28); when the second one-way valve (28) moves away from the first one-way valve (27), the negative pressure causes the first one-way valve (27) to open, and the exhaust gas is drawn into the first power box (22); then the first piston plate (24) moves in the opposite direction, pushing the exhaust gas into the reaction box (15) through the gas delivery pipe (37) and the diverter plate (38); S4. Reaction box switching and steam treatment: After injecting sufficient waste gas into the reaction box (15), start the stepper motor (8) to drive the bracket (13) to rotate 180° through the transmission shaft (9) to switch the position of the reaction box (15); move the reaction box (15) filled with waste gas above the electric heating plate (21) and turn on the power to heat it. After the ammonia boils, the steam pushes the moving cover (17) to move up, so that the exhaust hole (18) is connected to the flow hole (40) and the steam is discharged through the exhaust pipe (4); at the same time, the second piston plate (25) reciprocates under the drive of the transmission rod (26): when the pressure is negative, the third one-way valve (29) opens to draw in steam, and when the pressure is increased, the fourth one-way valve (30) opens to discharge steam to the external pipe; the moving cover (17) connected to the air inlet pipe (3) continuously transports waste gas under the magnetic attraction to achieve circulation treatment.

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