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CN-122006398-A - Organic waste gas normal-low-temperature coupling condensation closed-loop separation device and method

CN122006398ACN 122006398 ACN122006398 ACN 122006398ACN-122006398-A

Abstract

The invention discloses a device and a method for separating an organic waste gas by a closed loop through normal low-temperature coupling condensation, and relates to the technical field of atmospheric pollution treatment, wherein the device comprises a condensation component and a defrosting component, and the condensation component comprises a shell, a condensation pipe arranged in the shell, a fixed pipe connected with the condensation pipe and a motor arranged on the condensation pipe; the defrosting assembly comprises a rotating shaft connected with the motor, a first gear ring connected with the rotating shaft, a second gear set meshed with the first gear ring, an annular gear ring meshed with the second gear set, a defrosting plate arranged on the annular gear ring and a cylinder arranged on the fixed pipe, wherein the motor drives the defrosting plate to rotate circumferentially, the device realizes active dynamic cleaning of the outer wall of the condensing pipe, the structure can scrape an frost layer which is extremely easy to form in a normal low-temperature coupling environment in real time, the wall of the heat exchange pipe is ensured to always keep a constant high heat transfer coefficient, and the problems of heat resistance increase and heat exchange efficiency attenuation caused by frost accumulation in the traditional device are avoided.

Inventors

  • SHI LEI
  • XU XUECHEN
  • SHI QIANG
  • WU ENHUI
  • Shi Changru
  • CHENG YU
  • SHI CHANGJUN

Assignees

  • 浙江丰望环保有限公司

Dates

Publication Date
20260512
Application Date
20260318

Claims (10)

  1. 1. The device for coupling, condensing and closing the loop and separating the organic waste gas at a low temperature is characterized by comprising, The condensing assembly (100) comprises a shell (101), a condensing pipe (102) arranged in the shell (101), a fixed pipe (103) connected with the condensing pipe (102) and a motor (104) arranged on the condensing pipe (102); Defrosting subassembly (200), including with axis of rotation (201) that motor (104) are connected, with first gear circle (202) that axis of rotation (201) are connected, with second gear group (203) of first gear circle (202) meshing, with annular ring gear (204) of second gear group (203) meshing, set up in defrosting board (205) on annular ring gear (204), set up in cylinder (206) on fixed pipe (103), with slider (207) that cylinder (206) are connected, cup joint in defrosting ring (208) outside fixed pipe (103), set up in gag lever post (209) on defrosting ring (208).
  2. 2. The device for the normal low temperature coupling condensation closed loop separation of organic waste gas according to claim 1, wherein the front end of the shell (101) is provided with a waste gas inlet (1011), the rear end is provided with a waste gas outlet (1012), and the bottom is provided with a mixture outlet (1013).
  3. 3. The device for separating the condensation closed loop of the organic waste gas coupling at normal low temperature according to claim 2, wherein the condensation pipe (102) is fixedly arranged in the shell (101), a cooling liquid inlet (1021) is formed at the front end of the condensation pipe (102), and the motor (104) is fixedly arranged at the end part of the condensation pipe (102).
  4. 4. The device for separating organic waste gas from normal low temperature coupling condensation closed loop according to claim 3, wherein the fixed pipe (103) is communicated with the condensation pipe (102), a cooling liquid outlet (1031) is formed at the tail end of the fixed pipe (103), a groove (1032) is formed on the fixed pipe (103), and the groove (1032) is in a quarter ring shape.
  5. 5. The device for separating the condensed closed loop of the organic waste gas coupling at the normal temperature according to claim 4, wherein an output shaft of the motor (104) is fixedly connected with a rotating shaft (201), the tail end of the rotating shaft (201) is fixedly connected with the first gear ring (202), the first gear ring (202) is annular, the second gear set (203) is provided with a plurality of groups, the second gear set (203) is a gear set with two gears fixedly connected, the second gear set (203) is rotatably arranged on the side wall of the condensing tube (102), one gear in the second gear set (203) is meshed with the first gear ring (202), and the other gear is arranged outside the condensing tube (102) and meshed with the annular gear ring (204).
  6. 6. The device for separating organic waste gas from cold coupling and condensing closed loop of claim 5, wherein the annular gear ring (204) is rotatably arranged on the outer side wall of the condensing tube (102), a plurality of defrosting plates (205) are arranged, and the defrosting plates (205) are attached to the outer side wall of the condensing tube (102).
  7. 7. The device for normal low-temperature coupling, condensing and closed-loop separation of organic waste gas of claim 6, wherein the air cylinder (206) is fixedly arranged in the groove (1032), the telescopic end of the air cylinder (206) is fixedly connected with the sliding block (207), the sliding block (207) is slidably arranged in the groove (1032), the sliding block (207) is provided with a limiting groove (2071), and the limiting groove (2071) is obliquely arranged.
  8. 8. The device of claim 7, wherein the defrosting ring (208) is provided with a plurality of groups, a plurality of defrosting supporting rods (2081) are arranged on the defrosting ring (208), the defrosting supporting rods (2081) are attached to the outer side wall of the fixed pipe (103), the defrosting ring (208) is rotatably arranged outside the fixed pipe (103), a circle of annular grooves (2082) are formed in the inner side of the defrosting ring (208), and a plurality of clamping points (2083) are formed in the annular grooves (2082).
  9. 9. The device for separating the condensation closed loop of the organic waste gas coupling at the normal temperature according to claim 8, wherein a spring (1033) and a buckle (1034) are arranged in the side wall of the fixed pipe (103), one end of the spring (1033) is connected with the fixed pipe (103), the other end of the spring is connected with the buckle (1034), the buckle (1034) is embedded into the annular groove (2082), and the limiting rod (209) can be embedded into the limiting groove (2071).
  10. 10. A method for adopting the organic waste gas normal-low-temperature coupling condensation closed-loop separation device as claimed in claim 9, which is characterized by comprising the following steps: S1, a precooling stage, namely, organic waste gas enters from a waste gas inlet (1011), and the inlet air is preliminarily precooled by using cooling liquid entering from a cooling liquid inlet (1021); S2, performing cryogenic condensation, namely enabling the pre-cooled waste gas flow to a fixed pipe (103), exchanging heat with low-temperature cooling liquid in the fixed pipe (103), condensing and liquefying organic components, and discharging the organic components from a mixture outlet (1013); S3, dynamic defrosting, namely driving a defrosting plate (205) to rotate by a motor (104) to scrape off frosting on the outer wall of the condensing tube (102) in real time, driving a defrosting ring (208) to twist back and forth by an air cylinder (206) to clean frosting on the outer wall of the fixed tube (103); S4, cold energy recovery and circulation, namely, cooling liquid discharged from a cooling liquid outlet (1031) enters a refrigeration cycle unit to be cooled for the second time, and cooled cooling liquid enters a condensing tube (102) again through a cooling liquid inlet (1021) to form closed-loop cold circulation.

Description

Organic waste gas normal-low-temperature coupling condensation closed-loop separation device and method Technical Field The invention relates to the technical field of atmospheric pollution control, in particular to a device and a method for coupling, condensing and closing a loop and separating organic waste gas at a low temperature. Background With the acceleration of industrialization, the emission of organic exhaust gases (VOCs) has become one of the main sources of atmospheric pollution. Organic waste gas contains volatile organic compounds such as benzene, toluene, methylene dichloride and the like, and in many complex chemical process procedures, the generation of gases such as carbon monoxide (CO) and carbon dioxide (CO 2) is often accompanied. Carbon monoxide has extremely strong toxicity, and the emission into the atmosphere seriously threatens the health and ecological safety of human bodies, while carbon dioxide is taken as main greenhouse gas, and the large-scale emission is a core cause for warming global climate. Therefore, development of an efficient, energy-saving and environment-friendly comprehensive exhaust gas treatment device has become an urgent need in the industry. At present, the existing organic waste gas treatment technology mainly comprises activated carbon adsorption, catalytic combustion and a conventional condensation method. In practical application, the prior art has the remarkable defects that 1. The cold energy utilization rate is low, the traditional condensing device usually adopts single-stage cooling, the discharged cooling medium still contains a large amount of residual cold energy, and the residual cold energy is not effectively and stepwise utilized, so that the refrigeration energy consumption is huge, and the environment-friendly production requirement is not met. 2. In the normal low temperature switching process, moisture in the waste gas is extremely easy to frost on the wall of the condensation pipe, and the formed frost layer has extremely high thermal resistance. In the prior art, intermittent shutdown and defrosting are adopted, so that the production efficiency is reduced, the condensation temperature is fluctuated, and the auxiliary capturing or separating effect of carbon monoxide, carbon dioxide and other components is influenced. 3. The existing device is difficult to realize efficient heat exchange and ensure complete closed-loop separation, and secondary pollution is easy to cause. Aiming at the problems, the invention provides a device and a method for normally low-temperature coupling condensation closed-loop separation of organic waste gas, which realize high-efficiency treatment of waste gas components including carbon monoxide and carbon dioxide and complete utilization of cold energy through a mechanical defrosting structure and cold energy cascade circulation logic. Disclosure of Invention This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application. The invention is provided in view of the problems of the conventional device and method for separating the organic waste gas by the normal low-temperature coupling condensation closed loop. Therefore, the invention aims to provide a device and a method for coupling, condensing and closing a loop for organic waste gas at a low temperature so as to realize efficient treatment and complete utilization of cold energy for waste gas components including carbon monoxide and carbon dioxide. The technical scheme is that the condensation closed-loop separation device for coupling organic waste gas at low temperature comprises a condensation assembly, a defrosting assembly and a limiting rod, wherein the condensation assembly comprises a shell, a condensation pipe arranged in the shell, a fixing pipe connected with the condensation pipe, and a motor arranged on the condensation pipe, the defrosting assembly comprises a rotating shaft connected with the motor, a first gear ring connected with the rotating shaft, a second gear set meshed with the first gear ring, an annular gear ring meshed with the second gear set, a defrosting plate arranged on the annular gear ring, a cylinder arranged on the fixing pipe, a sliding block connected with the cylinder, a defrosting ring sleeved outside the fixing pipe and the limiting rod arranged on the defrosting ring. As a preferable scheme of the device and the method for the normal low-temperature coupling condensation closed-loop separation of the organic waste gas, the invention is characterized in that the front end of the shell is provided with a waste gas inlet, the rear end of the shell is provided with a waste gas outlet, and the bottom of the shell is provided with a mixture outlet. A