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CN-122006382-A - Venturi washing tower for washing flue gas and application method thereof

CN122006382ACN 122006382 ACN122006382 ACN 122006382ACN-122006382-A

Abstract

The invention belongs to the field of flue gas treatment, in particular to a venturi scrubber for scrubbing flue gas and a use method thereof, comprising a scrubber main body and a filler body, wherein the filler body is positioned in the scrubber main body; the packing body is provided with an annular outer wall and an inner through hole, the annular outer wall is provided with a surface self-cleaning unit, the inner through hole is provided with an inner dead angle-free unit, the self-cleaning unit and the inner dead angle-free unit do not interfere with each other and form a cooperative flow guiding relationship, and the inner and outer flow guiding structures are mutually independent and cooperatively work by arranging the surface self-cleaning unit on the annular outer wall of the packing body and the inner dead angle-free unit in the inner through hole, so that liquid flow interference and flow field disorder are avoided from structural design, stable gas-liquid two-phase circulation is realized, and the mass transfer efficiency and the operation reliability of the packing are obviously improved.

Inventors

  • LIN TAO

Assignees

  • 大连楠海环保工程有限公司

Dates

Publication Date
20260512
Application Date
20260407

Claims (10)

  1. 1. A venturi scrubber for scrubbing flue gas, comprising: a washing tower main body (100) and a filler body (200), wherein the filler body (200) is positioned in the washing tower main body (100); The packing body (200) is provided with an annular outer wall and an inner through hole, the annular outer wall is provided with a surface self-cleaning unit (300), the inner through hole is provided with an inner dead angle-free unit (400), the surface self-cleaning unit (300) and the inner dead angle-free unit (400) do not interfere, and a cooperative flow guiding relationship is formed.
  2. 2. The venturi scrubber for scrubbing flue gas according to claim 1, wherein the surface self-cleaning unit (300) comprises an adjusting boss (310), a self-cleaning diversion chute (320), a V-shaped liquid film tearing groove (330) and micro-breaking ribs (340), and is integrally formed on the annular outer wall.
  3. 3. The venturi scrubber for scrubbing flue gas according to claim 2, wherein the adjusting boss (310) is disposed at an edge area of the annular outer wall and is located at an uppermost portion of the annular outer wall, the self-cleaning flow guiding chute (320) is located below the adjusting boss (310), the self-cleaning flow guiding chute (320) and the adjusting boss (310) are arranged in a staggered manner and are communicated with each other, and the adjusting boss (310) can guide liquid to flow into the self-cleaning flow guiding chute (320).
  4. 4. The venturi scrubber for scrubbing flue gas according to claim 2, wherein the V-shaped liquid film tearing groove (330) is located below the self-cleaning diversion chute (320) and is mutually communicated, and is capable of receiving liquid drained from the self-cleaning diversion chute (320), the micro-flow-breaking ribs (340) are arranged in a staggered manner along the axial direction, and the V-shaped liquid film tearing groove (330) is arranged between two adjacent micro-flow-breaking ribs (340).
  5. 5. The venturi scrubber for scrubbing flue gas according to claim 2, wherein the inner dead-angle-free unit (400) comprises a gradual tapered through hole (410), an annular flow guiding boss (420) and a dead-angle eliminating bump (440), wherein the gradual tapered through hole (410) is provided through and penetrates the filler body (200), and the annular flow guiding boss (420) is provided on an inner wall of the gradual tapered through hole (410).
  6. 6. The venturi scrubber for scrubbing flue gas according to claim 5, wherein the outlet side port of the tapered through hole (410) is provided with an annular diversion trench (430), and the annular diversion trench (430) can drain residual liquid and impurities on the inner wall of the tapered through hole (410) to the V-shaped liquid film tearing trench (330) on the annular outer wall, so as to realize cooperative diversion of the inner dead-angle-free unit (400) and the surface self-cleaning unit (300).
  7. 7. The venturi scrubber for scrubbing flue gas according to claim 2, wherein the annular deflector boss (420) is completely separated from the adjustment boss (310) on the annular outer wall, avoiding overlapping and interference.
  8. 8. A venturi scrubber for scrubbing flue gas according to claim 3, wherein the annular outer wall is divided radially into an outer layer and an inner layer, the outer layer is provided with an adjusting boss (310) and a self-cleaning diversion chute (320), the inner layer is provided with a micro-flow-breaking rib (340) and a V-shaped liquid film tearing groove (330), and the outer layer and the inner layer are not overlapped with each other.
  9. 9. The venturi scrubber for scrubbing flue gas according to claim 5, wherein the dead angle eliminating protrusion (440) is disposed on the inner wall of the packing body (200), and the dead angle eliminating protrusion (440) cooperates with the annular guide boss (420) of the inner wall of the tapered through hole (410) to eradicate the dead angle vortex area inside the packing body (200) and does not interfere with the surface self-cleaning unit (300) on the annular outer wall.
  10. 10. A method of using a venturi scrubber for scrubbing flue gas, adapted to any one of claims 1-9, comprising the steps of: s1, pre-preparation, namely installing the packing body (200) in a washing tower main body (100), ensuring that a reasonable gap is reserved between the annular outer wall of the packing body (200) and the inner wall of the washing tower main body (100), avoiding structural interference and ensuring smooth gas-liquid flow; S2, liquid guiding, namely starting the washing tower main body (100), guiding the liquid through the working condition adapting and adjusting boss (310), flowing the liquid into the self-cleaning diversion chute (320), and draining the liquid to the V-shaped liquid film tearing groove (330) through the self-cleaning diversion chute (320) to realize preliminary liquid distribution; s3, liquid film treatment, namely tearing liquid into tiny liquid drops through a V-shaped liquid film tearing groove (330), and increasing the contact area with smoke; S4, internal diversion, namely guiding the liquid in the gradual change conical through hole (410) through the annular diversion boss (420), discharging the liquid to the V-shaped liquid film tearing groove (330) through the annular diversion groove (430), and forming cooperation with the surface self-cleaning unit (300); S5, working condition adaptation, namely adjusting the liquid flow speed according to the spraying quantity in the washing tower main body (100), adapting the liquid flow requirements under different working conditions by adjusting the flow guiding function of the boss (310), and ensuring that liquid flows along a preset path without splashing.

Description

Venturi washing tower for washing flue gas and application method thereof Technical Field The invention relates to the field of flue gas treatment, in particular to a venturi scrubber for scrubbing flue gas. Background The venturi scrubber belongs to a wet dust collector. Wet dust collectors, also called scrubbing dust collectors, are devices that separate dust particles from an air stream by the action of contact, impingement, etc. of a dust-laden gas with liquid droplets or liquid films. The wet dust collector can not only purify solid particle pollutants in waste gas, but also remove gaseous pollutants (gas absorption), and can also play a role in gas cooling. The wet dust collector has the characteristics of less equipment investment, simple structure and high purification efficiency. The equipment is generally provided with no movable parts, is suitable for purifying various kinds of dust which are non-fibrous and do not react with water chemically and do not adhere, and is especially suitable for purifying high-temperature, inflammable, explosive and harmful gases. The packing used in the existing Venturi washing tower is of a conventional annular or porous structure, stable vortex dead angles and low-speed detention areas are easy to form in an inner through hole area in a long-term operation process, dust in smoke and impurities in spray liquid are continuously collided, deposited and bonded in the vortex and low-speed areas, compact scale layers are gradually accumulated on the inner walls of the pore channels, the scale layers are continuously thickened along with the extension of the operation time, the effective flow cross section of the packing through hole is directly caused to be continuously reduced, and the mass transfer area is greatly attenuated. Meanwhile, the traditional filler does not have an internal flow guiding and self-discharging structure, residual liquid and sediments in the pore canal cannot be effectively carried away, further aggravate blocking and hardening, finally lead to overall failure of the filler, rapid increase of system resistance and obvious reduction of washing efficiency, and only can shut down for cleaning or overall replacement of the filler. Disclosure of Invention In order to make up the deficiency of the prior art, the inner through hole area is easy to form a stable vortex dead angle and a low-speed detention area, so that the effective flow cross section of the filling through hole is continuously reduced, and the mass transfer area is greatly attenuated. The invention solves the technical problems by adopting the technical scheme that the venturi scrubber for scrubbing flue gas comprises: the washing tower comprises a washing tower main body and a filler body, wherein the filler body is positioned in the washing tower main body; the packing body is provided with an annular outer wall and an inner through hole, the annular outer wall is provided with a surface self-cleaning unit, the inner through hole is provided with an inner dead angle-free unit, the surface self-cleaning unit and the inner dead angle-free unit do not interfere with each other, and a cooperative flow guiding relationship is formed. Further, the surface self-cleaning unit comprises an adjusting boss, a self-cleaning diversion chute, a V-shaped liquid film tearing groove and a micro-cutoff rib, and is uniformly and integrally formed on the annular outer wall. Further, the adjusting boss is arranged in the edge area of the annular outer wall and is located at the uppermost part of the annular outer wall, the self-cleaning flow guiding chute is located below the adjusting boss, the self-cleaning flow guiding chute and the adjusting boss are arranged in a staggered mode and are mutually communicated, and the adjusting boss can guide liquid to flow into the self-cleaning flow guiding chute. Further, the V-shaped liquid film tearing groove is positioned below the self-cleaning flow guiding chute and communicated with each other, can receive liquid drained by the self-cleaning flow guiding chute, the micro-flow blocking ribs are arranged in a staggered mode along the axial direction, and the V-shaped liquid film tearing groove is arranged between two adjacent micro-flow blocking ribs. Further, the inside no dead angle unit includes gradual change toper through-hole, annular water conservancy diversion boss and dead angle elimination lug, gradual change toper through-hole is for running through the setting and running through the filler body, annular water conservancy diversion boss sets up on the inner wall of gradual change toper through-hole. Furthermore, the annular diversion trench is arranged at the outlet side port of the gradual change conical through hole, and can discharge residual liquid and impurities on the inner wall of the gradual change conical through hole to the V-shaped liquid film tearing groove on the outer wall of the annular, so that the cooperative diversion of the dead