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CN-121988155-A - Tail gas treatment process for wastewater in NMP regeneration system

CN121988155ACN 121988155 ACN121988155 ACN 121988155ACN-121988155-A

Abstract

The invention relates to the technical field of tail gas treatment, and discloses a tail gas treatment process of wastewater in an NMP regeneration system, which comprises the following steps: the invention realizes flexible switching and sealing of an air passage channel through a linkage accurate control structure of a double telescopic piece, the annular baffle and the piston, and realizes flexible switching and sealing of the air passage channel by combining a stable negative pressure driving design and a high-efficiency interception filtering structure, thus constructing an integrated accurate air control and primary purification system, not only avoiding air passage leakage and ensuring smooth air flow, but also realizing thorough removal of harmful components by a multistage collaborative purification design, ensuring that emission reaches standards and no secondary pollution, and simultaneously ensuring stable and efficient operation of core reaction.

Inventors

  • YOU LIN
  • ZHOU WEI
  • OU NING

Assignees

  • 广东百宏裕能新材料科技有限公司

Dates

Publication Date
20260508
Application Date
20260313

Claims (8)

  1. 1. The tail gas treatment process of the wastewater in the NMP regeneration system is characterized by comprising the following steps of: Firstly, driving a circular baffle plate (17) to ascend through a second telescopic piece (18) and driving a piston (13) to descend through a first telescopic piece (16), so that a gap (9) is opened and a through hole (10) is closed, driving a fan blade (6) to rotate through a servo motor (202) at the moment, sucking tail gas into a chemical spray tower (1) through a first air pipe (7), the gap (9), an air duct (5) and the air duct (2) to treat the tail gas, wherein impurities in the tail gas can be intercepted by a first filter screen (4); Step two, cleaning the first filter screen (4) after long-term operation, driving the annular baffle plate (17) to descend through the second telescopic piece (18) and driving the piston (13) to ascend through the first telescopic piece (16), enabling the gap (9) to be closed and the through hole (10) to be opened, enabling the first cleaning component to abut against the first filter screen (4), enabling tail gas to enter the chemical spray tower (1) through the first air pipe (7), the second air pipe (8), the through hole (10), the air duct (5) and the ventilation pipe (2), cleaning the first filter screen (4) through the first cleaning component, and enabling the tail gas to be filtered through the second filter screen (19) and the first filter screen (4) in sequence; And thirdly, resetting after the cleaning of the first filter screen (4) is finished, at the moment, lifting the annular baffle plate (17) to open the gap (9), driving the second cleaning assembly to abut against the second filter screen (19), and cleaning the second filter screen (19) through the second cleaning assembly when tail gas enters the chemical spray tower (1).
  2. 2. The process for treating the tail gas of the wastewater in the NMP regeneration system according to claim 1 is realized by being attached to a tail gas treatment device, the tail gas treatment device comprises a chemical spray tower (1), a ventilation pipe (2) and a filter pipe (3), the chemical spray tower (1) is communicated with the ventilation pipe (2), the ventilation pipe (2) is communicated with the filter pipe (3), a first filter screen (4) is fixedly arranged at the communication position of the ventilation pipe (2) and the filter pipe (3), a fan assembly is arranged in the ventilation pipe (2), the fan assembly is used for sucking the tail gas from the filter pipe (3), the air channel (5) is arranged in the filter pipe (3), the air channel (5) is communicated with the ventilation pipe (2), a second air pipe (8) is fixedly arranged in the air channel (5), the outer circular surface of the second air pipe (8) is provided with a through hole (10), the second air pipe (8) is communicated with the air channel (5), the filter pipe (3) is internally and fixedly provided with a first piston (7) and a second air pipe (7) are internally provided with a piston (13), piston (13) by fixed mounting in first extensible member (16) drive in second tuber pipe (8) goes up and down, just be provided with on piston (13) first clearance subassembly, second tuber pipe (8) outer round sliding sleeve has cup jointed ring baffle (17), ring baffle (17) by fixed mounting in second extensible member (18) drive in filter tube (3) goes up and down, works as first extensible member (16) drive piston (13) descend, piston (13) close through-hole (10), this moment first clearance subassembly is kept away from first filter screen (4), works as first extensible member (16) drive piston (13) ascend, piston (13) are opened through-hole (10), this moment first clearance subassembly butt first (4), works as second extensible member (18) drive ring baffle (17) go up, works as first extensible member (16) drive piston (13) descend, work as ring baffle (17) clearance (9) keep away from when second filter screen (17) clearance is kept away from ring baffle (17).
  3. 3. The tail gas treatment process of wastewater in an NMP regeneration system according to claim 2, wherein the first cleaning component comprises a first rotating rod (11), a first cleaning rod (12) and a first vortex blade (15), the first rotating rod (11) is rotatably installed on the piston (13), the first rotating rod (11) and the piston (13) are coaxially arranged, the top end of the first rotating rod (11) penetrates through the second air pipe (8), the top end of the first rotating rod (11) is fixedly provided with the first cleaning rod (12), the first vortex blade (15) is coaxially and fixedly installed at the bottom end of the first rotating rod (11), and when the through hole (10) is opened, the first cleaning rod (12) is abutted to the first filter screen (4).
  4. 4. A process for treating waste water tail gas in an NMP regeneration system according to claim 3, wherein the bottom end of the second air pipe (8) is fixedly provided with the second filter screen (19), the outer circular surface of the circular baffle plate (17) is slidably connected with the inner wall of the first air pipe (7), a U-shaped frame (20) is fixedly arranged at the bottom end of the circular baffle plate (17), a second cleaning assembly is arranged on the U-shaped frame (20), when the circular baffle plate (17) is far away from the gap (9), the second cleaning assembly is abutted against the second filter screen (19), and when the circular baffle plate (17) is used for blocking the gap (9), the second cleaning assembly is far away from the second filter screen (19).
  5. 5. The process for treating the tail gas of the wastewater in the NMP regeneration system according to claim 4, wherein the second cleaning assembly comprises a second rotating rod (21), a second cleaning rod (22) and a second vortex blade (23), the second rotating rod (21) is rotatably installed on the U-shaped frame (20), the second cleaning rod (22) is coaxially and fixedly installed at the top end of the second rotating rod (21), the second vortex blade (23) is coaxially and fixedly installed at the bottom end of the second rotating rod (21), when the annular baffle (17) is far away from the gap (9), the second cleaning rod (22) is abutted against the second filter screen (19), and when the annular baffle (17) is used for blocking the gap (9), the second cleaning rod (22) is far away from the second filter screen (19).
  6. 6. The process for treating the tail gas of the wastewater in the NMP regeneration system according to claim 5, wherein the fan assembly comprises a bracket (201), a servo motor (202) and fan blades (6), the bracket (201) is fixedly installed on the inner wall of the ventilation pipe (2), the servo motor (202) is fixedly installed on the bracket (201), an output shaft of the servo motor (202) is fixedly connected with a rotating shaft of the fan blades (6) coaxially, and the fan blades (6) are rotatably installed on the bracket (201).
  7. 7. The process for treating the tail gas of the wastewater in the NMP regeneration system according to claim 6, wherein an extension frame (25) is fixedly installed on the inner wall of the first air pipe (7), the second rotating rod (21) penetrates through the extension frame (25) to be arranged, the second rotating rod (21) is slidably connected with the extension frame (25), a locking assembly is arranged on the extension frame (25), the locking assembly is connected with the second rotating rod (21), a fixing block (24) is fixedly installed on the U-shaped frame (20), and when the annular baffle (17) descends to block the gap (9), the annular baffle (17) drives the U-shaped frame (20) to descend synchronously, and the fixing block (24) descends to lock the second rotating rod (21) through the locking assembly.
  8. 8. The process for treating waste water tail gas in an NMP regeneration system according to claim 7, wherein the locking assembly comprises a bevel edge (26), a cavity (27), a supporting rod (28), a roller (29) and a spring (14), the cavity (27) is arranged in the extension frame (25), the supporting rod (28) is slidably arranged in the cavity (27), the supporting rod (28) is connected with the cavity (27) through the spring (14), the pre-tightening force of the spring (14) enables the supporting rod (28) to be far away from the second rotating rod (21), one end of the supporting rod (28) far away from the second rotating rod (21) is positioned outside the extension frame (25), the supporting rod (28) is rotatably provided with the roller (29), the bevel edge (26) is arranged at the bottom end of the fixed block (24), the level of one end of the bevel edge (26) close to the second rotating rod (21) is higher than the level of the other end of the bevel edge (26) far away from the second rotating rod (21), and the supporting rod (28) is matched with the roller (29) when the second rotating rod (21) is in a rolling mode.

Description

Tail gas treatment process for wastewater in NMP regeneration system Technical Field The invention relates to the technical field of tail gas treatment, in particular to a tail gas treatment process of wastewater in an NMP regeneration system. Background Generally, the waste water and tail gas treatment process of the NMP regeneration system is an environment-friendly treatment process for treating the volatile tail gas of the waste water in the NMP regeneration process, and is used for removing NMP components, malodorous substances and various harmful impurities contained in the tail gas. In the waste water and tail gas treatment process of the NMP regeneration system, interception and purification of a tail gas air inlet end filter screen are key steps, a large amount of impurities are accumulated after the filter screen is used for a long time, the impurities are dust, solid particles and waste water mist drops carried in the tail gas, the impurities are adhered to the surface of the filter screen for a long time and block pores, if the accumulated impurities are not cleaned timely, the tail gas can be directly prevented from smoothly entering a spray tower, the flow rate of the tail gas passing through the filter screen is greatly reduced, the air inflow is unstable, the tail gas entering the chemical spray tower cannot fully contact with an acidic absorption liquid for mass transfer, the neutralization reaction is not thorough, the tail gas treatment efficiency is further slowed down, and in addition, the filter screen is blocked, the operation load of a fan is increased. Disclosure of Invention The invention aims to provide a tail gas treatment process for wastewater in an NMP regeneration system to solve the technical problems in the prior art. The aim of the invention can be achieved by the following technical scheme: a tail gas treatment process of wastewater in an NMP regeneration system comprises the following steps: Firstly, driving a circular baffle plate to ascend through a second telescopic piece and driving a piston to descend through a first telescopic piece, so that a gap is opened and a through hole is closed, at the moment, driving a fan blade to rotate through a servo motor to suck tail gas into a chemical spray tower through a first air pipe, the gap, an air flue and a ventilation pipe for tail gas treatment, and intercepting impurities in the tail gas by a first filter screen; Step two, cleaning the first filter screen after long-term operation, namely driving the annular baffle plate to descend through the second telescopic piece and driving the piston to ascend through the first telescopic piece, so that a gap is closed and a through hole is opened, at the moment, the first cleaning component is abutted against the first filter screen, tail gas enters the chemical spray tower through the first air pipe, the second air pipe, the through hole, the air flue and the ventilation pipe, and meanwhile, the first cleaning component cleans the first filter screen, and the tail gas is filtered through the second filter screen and the first filter screen in sequence; and thirdly, resetting after the first filter screen is cleaned, lifting the annular baffle to open a gap, driving the second cleaning assembly to abut against the second filter screen, and cleaning the second filter screen through the second cleaning assembly when tail gas enters the chemical spray tower. The utility model provides a tail gas treatment technology of waste water in NMP regeneration system, is dependent on tail gas processing apparatus and realizes, and tail gas processing apparatus includes chemical spray tower, ventilation pipe, filter tube, chemical spray tower and ventilation pipe intercommunication, ventilation pipe and filter tube intercommunication, and ventilation pipe and filter tube intercommunication department fixed mounting have first filter screen, be provided with the fan subassembly in the ventilation pipe, the fan subassembly is used for inhaling tail gas from the filter tube, the wind channel has been seted up in the filter tube, wind channel and ventilation pipe intercommunication, fixed mounting has the second tuber pipe in the wind channel, the through-hole has been seted up to the outer disc of second tuber pipe, the through-hole communicates with the wind channel through the second tuber pipe, fixed mounting has first tuber pipe in the filter tube, there is the clearance between first tuber pipe and the second tuber pipe, sliding mounting has the piston in the second tuber pipe, the piston is driven by fixed mounting in the first telescopic link in the second tuber pipe and goes up and down, and is provided with first clearance subassembly on the piston, the outer circle face sliding sleeve of second tuber pipe has cup jointed the ring baffle, the ring is driven the piston clearance when the first telescopic link is driven by fixed mounting in the filter tube and goes up and down the first tel