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CN-121993805-A - Hazardous waste burns tail gas purification treatment device

CN121993805ACN 121993805 ACN121993805 ACN 121993805ACN-121993805-A

Abstract

The invention discloses a hazardous waste incineration tail gas purification treatment device, which relates to the technical field of flue gas purification, and is characterized in that a spiral baffle I and a spiral baffle II are arranged in an internal shrinkage cavity of an inner shell, so that flue gas forms rotary air flow, primary separation of particles is realized by utilizing centrifugal effect, meanwhile, the air flow is disturbed and locally accelerated by combining a separation assembly, the particles are further separated from the air flow, a multistage separation mechanism is formed, the separation efficiency of the particles in the hazardous waste incineration tail gas is obviously improved, particularly, fine particles have better separation effect, a separation cavity and a reflux groove are arranged, the gas is refluxed to the inner shell and discharged after the particles are settled in a low-speed area, the particles are prevented from directly entering an exhaust pipe, and meanwhile, the residual particles in the reflux gas are secondarily intercepted by utilizing the cooperation of a movable column, a spring and a filter screen, and the particle accumulation is reduced by elastic vibration, so that the re-entrainment phenomenon of the particles is effectively reduced.

Inventors

  • WANG QIAN
  • LIU HONGAN

Assignees

  • 江苏举世检测有限公司

Dates

Publication Date
20260508
Application Date
20260401

Claims (10)

  1. 1. The hazardous waste incineration tail gas purification treatment device comprises a combustion furnace (1) and an air duct (2) communicated with the combustion furnace, and is characterized in that the air duct (2) is connected with a treatment assembly (3), the treatment assembly (3) comprises an outer shell (301) and an inner shell (302) arranged in the outer shell (301), a separation cavity (307) is formed between the inner shell (302) and the outer shell (301), and an inward shrinking cavity (303) for flue gas circulation is formed in the inner shell (302); A first spiral partition plate (305) and a second spiral partition plate (306) which extend along the air flow direction are arranged in the inward shrinking cavity (303) and are used for guiding the flue gas to form a rotating air flow so that particles in the flue gas migrate and concentrate to the inner wall of the inner shell (302) under the centrifugal action; a plurality of separation assemblies (4) are arranged in the inner shell (302), and the separation assemblies (4) are used for changing the flow path of the rotating airflow and forming local disturbance so as to promote the enriched particulate matters to be separated from the airflow; The separation cavity (307) is used for receiving particles separated from the inner shell (302) and performing sedimentation separation, a plurality of reflux grooves (308) are uniformly formed in the inner shell (302), and the separation cavity (307) is communicated with the inner shell (302) through the reflux grooves (308) so that gas flows back to the inner shell (302) after the particles are sedimented in the separation cavity (307) and is finally discharged through the exhaust pipe (304).
  2. 2. The hazardous waste incineration tail gas purifying treatment device according to claim 1, wherein the first spiral partition plate (305) and the second spiral partition plate (306) are arranged at intervals along the axial direction, and the interval between the first spiral partition plates (305) is larger than the interval between the second spiral partition plates (306), so that the flue gas is gradually accelerated along the flowing direction, and the centrifugal separation effect of the particulate matters is enhanced.
  3. 3. The hazardous waste incineration tail gas purification treatment device according to claim 1, wherein the separation assembly (4) comprises a slot (401) arranged on the inner wall of the inner shell (302) and a separation block (404) arranged in the slot (401), an annular guide plate (402) is arranged on the outer side of the separation block (404), and a guide groove (403) is arranged on the annular guide plate (402) and used for guiding airflow to deflect and form a local acceleration area.
  4. 4. A hazardous waste incineration tail gas purification treatment apparatus according to claim 3, wherein the separation block (404) is provided with a plurality of separation reduction grooves (408) for increasing the disturbance degree of the air flow and improving the separation efficiency of the particulate matters from the air flow.
  5. 5. The hazardous waste incineration tail gas purification treatment device according to claim 4, wherein a plurality of positioning convex columns (405) are arranged on the outer side surface of the separation block (404), a plurality of positioning grooves (406) are formed in the annular guide plate (402), and thread grooves (407) are formed in the positioning convex columns (405) and the positioning grooves (406) and are used for realizing connection of the separation block (404) and the annular guide plate (402).
  6. 6. A hazardous waste incineration exhaust purification treatment apparatus according to claim 1, wherein the inner housing (302) is provided with a backflow assembly comprising a backflow groove (308) and a movable groove (309) for guiding a part of the air flow to flow back and weakening the carrying effect of the main air flow on the separated particulate matters.
  7. 7. The hazardous waste incineration tail gas purification treatment device according to claim 6, wherein a fixed column (310) and a movable column (311) matched with the fixed column are arranged in the movable groove (309), a spring (312) is arranged in the fixed column (310), and the end part of the movable column (311) is connected with a filter screen (313) for elastically deforming under the action of air flow and intercepting particulate matters.
  8. 8. The hazardous waste incineration tail gas purification treatment device according to claim 7, wherein a pollution discharge assembly (5) is arranged in the outer shell (301), and the pollution discharge assembly (5) comprises a liquid flowing ring groove (506) and a liquid flowing hole (505) communicated with the liquid flowing ring groove.
  9. 9. The hazardous waste incineration tail gas purification treatment device according to claim 8, wherein the sewage disposal assembly (5) further comprises a water inlet pipe (501), a spray head (503) and a water outlet pipe (502), the water inlet pipe (501) is installed in the outer shell (301), the water outlet pipe (502) is installed in the outer shell (301), the spray head (503) is installed on one end surface of the water inlet pipe (501), and the spray head (503) is used for spraying liquid to wash out residual particles of gas.
  10. 10. The hazardous waste incineration tail gas purification treatment device according to claim 9, wherein a conical flow table (504) is arranged inside the outer shell (301) and is used for guiding liquid and particulate matters to collect in the liquid flow ring groove (506).

Description

Hazardous waste burns tail gas purification treatment device Technical Field The invention relates to the technical field of flue gas purification, in particular to a hazardous waste incineration tail gas purification treatment device. Background The hazardous waste can generate a large amount of high-temperature tail gas in the incineration treatment process, and the tail gas usually contains dust particles, incompletely combusted products and other harmful substances, and can cause serious pollution to the environment if the hazardous waste is directly discharged without effective treatment. Therefore, in the hazardous waste incineration system, it is generally necessary to provide an exhaust gas purifying treatment device for separating and removing particulate matters in the flue gas. The existing tail gas particle separation device mainly adopts cyclone separation, filter screen filtration or simple sedimentation structure, and realizes separation of particles and gas through centrifugal force or physical blocking, however, in the practical application process, due to large fluctuation of burning working conditions, unstable flue gas flow speed and particle size distribution of particles, the traditional single separation mode is difficult to realize effective removal of particles with different particle sizes, especially has poor separation effect on fine particles, the whole separation efficiency is limited, the particles are easily taken away again along with air flow in the separation process, and re-entrainment phenomenon is generated, so that the purification effect is reduced, meanwhile, the internal structure of part of the device is simpler, and an effective particle sedimentation and backflow regulation mechanism is lacked, so that the separated particles are difficult to stably settle, and the operation stability of the system is influenced. Disclosure of Invention Aiming at the problems of low separation efficiency and easy re-entrainment of tail gas particles in the prior art, the invention provides a hazardous waste incineration tail gas purifying treatment device. The invention is realized by the following technical scheme that the hazardous waste incineration tail gas purifying treatment device comprises a combustion furnace and an air duct communicated with the combustion furnace, wherein the air duct is connected with a treatment assembly, the treatment assembly comprises an outer shell and an inner shell arranged in the outer shell, a separation cavity is formed between the inner shell and the outer shell, and an inward shrinking cavity for smoke circulation is formed in the inner shell; The first spiral partition plate and the second spiral partition plate which extend along the air flow direction are arranged in the inward shrinking cavity and are used for guiding the flue gas to form rotary air flow, so that particles in the flue gas migrate and are enriched towards the inner wall of the inner shell under the centrifugal action; The inner shell is internally provided with a plurality of separation components, and the separation components are used for changing the flow path of the rotating airflow and forming local disturbance so as to promote enriched particles to be separated from the airflow; the separation cavity is used for receiving particles separated from the inner shell and carrying out sedimentation separation, a plurality of reflux grooves are uniformly formed in the inner shell, and the separation cavity is communicated with the inner shell through the plurality of reflux grooves, so that gas flows back to the inner shell after the particles are settled in the separation cavity and is finally discharged through the exhaust pipe. Further, the first spiral partition plate and the second spiral partition plate are arranged at intervals along the axial direction, and the distance between the first spiral partition plates is larger than that between the second spiral partition plates, so that the flue gas is gradually accelerated along the flowing direction, and the centrifugal separation effect of the particulate matters is enhanced. Further, the separation assembly comprises a slot arranged on the inner wall of the inner shell and a separation block arranged in the slot, an annular guide plate is arranged on the outer side of the separation block, and a guide groove is arranged on the annular guide plate and used for guiding airflow to deflect and form a local acceleration area. Further, the separation block is provided with a plurality of separation reduction grooves for increasing the disturbance degree of the airflow and improving the separation efficiency of the particles from the airflow. Further, the outside surface of separation piece is equipped with a plurality of location projection, a plurality of constant head tank has been seted up to the inside of annular guide plate, just be provided with the screw thread groove in location projection and the constant head