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CN-118582742-B - Incineration device tail gas treatment flue structure

CN118582742BCN 118582742 BCN118582742 BCN 118582742BCN-118582742-B

Abstract

The invention discloses a tail gas treatment flue structure of an incinerator, which solves the problem of great difficulty in the transformation process when the existing incinerator is added with subsequent treatment equipment; the discharge flue penetrates through the chimney, two ends of the discharge flue are respectively connected with the incineration device and the alkaline washing device, one end of the return flue is connected with the alkaline washing device, and the other end of the return flue extends into the chimney. The invention can increase the purpose of subsequent treatment equipment without changing the original equipment layout, and reduces the difficulty of the transformation process.

Inventors

  • YUAN CHENGZHI
  • SUN YUTING
  • ZHANG WEIQIAN
  • WANG MENG
  • SUN YING

Assignees

  • 中国石化工程建设有限公司
  • 中石化炼化工程（集团）股份有限公司

Dates

Publication Date
20260512
Application Date
20230303

Claims (8)

  1. 1. The tail gas treatment flue structure of the incineration device is characterized in that the incineration device is connected with a chimney (2), and the flue structure comprises a guiding-out flue and a returning flue (17); The guide-out flue penetrates through the chimney (2), and two ends of the guide-out flue are respectively connected with the incineration device and the alkaline washing device; one end of the return flue (17) is connected with the alkaline washing device, and the other end of the return flue extends into the chimney (2); The guide-out flue comprises a shrinkage flue (3), a flue pipe (4) and a flue gas guide-out pipe (16) which are sequentially communicated, wherein the open end of the shrinkage flue (3) is connected with a tail flue (1) of the incineration device, the narrow end of the shrinkage flue (3) is connected with the flue pipe (4), one end of the flue gas guide-out pipe (16) is positioned in the chimney (2) and is connected with the flue pipe (4), and the other end of the flue gas guide-out pipe passes through the side wall of the chimney (2) and is connected with the alkaline washing device; an insulating layer (5) is arranged on the inner wall or the outer wall of the flue pipe (4); the flue pipe is in socket connection with the flue gas eduction tube.
  2. 2. The tail gas treatment flue structure of the incineration device according to claim 1, characterized in that a first through hole for the flue gas eduction tube (16) to pass through and a second through hole for the return flue (17) to pass through are arranged on the side wall of the chimney (2), an annular first connecting piece (6) is arranged on the axial outer side of the first through hole, a first flange piece (7) is connected with the first connecting piece (6), a first fixing flange connected with the first flange piece (7) is arranged on the flue gas eduction tube (16), an annular second connecting piece (8) is arranged on the axial outer side of the second through hole, a second flange piece (9) is connected with the second connecting piece (8), and a second fixing flange connected with the second flange piece (9) is arranged on the return flue (17).
  3. 3. The incineration device tail gas treatment flue structure according to claim 2, wherein a first heat insulation blanket (12) is filled between the inner periphery of the first connecting piece (6) and the outer wall of the flue gas eduction tube (16) and between the inner periphery of the second connecting piece (8) and the outer wall of the return flue (17), and a second heat insulation blanket (13) is filled between the hole wall of the first through hole and the flue gas eduction tube (16) and between the hole wall of the second through hole and the return flue (17) in a sealing manner.
  4. 4. The tail gas treatment flue structure of the incineration device according to claim 2, wherein a connecting steel plate (15) is arranged on the outer wall of the chimney (2), the first connecting piece (6) and the second connecting piece (8) are connected with the connecting steel plate (15) in a welding mode, a first sealing band is arranged between the first flange piece (7) and the first fixing flange, and a second sealing band is arranged between the second flange piece (9) and the second fixing flange.
  5. 5. The tail gas treatment flue structure of the incineration device according to claim 1, wherein a third flange (11) and a ring-shaped third connecting piece (10) are sleeved at one end of the flue gas eduction tube (16), the third connecting piece (10) is connected with the third flange (11), and a third fixing flange connected with the third flange (11) is arranged at one end of the flue gas tube (4).
  6. 6. The tail gas treatment flue structure of the incineration device according to claim 5, wherein a third heat insulation blanket (14) is filled between the inner periphery of the third connecting piece (10) and the outer wall of the flue pipe (4), and a third sealing belt is arranged between the third flange piece (11) and the third fixing flange.
  7. 7. The tail gas treatment flue structure of the incineration device according to claim 1, wherein the caliber of the open end of the necking flue (3) is matched with the caliber of the tail flue (1), and the caliber of the narrow opening end of the necking flue (3) is matched with the caliber of the flue pipe (4).
  8. 8. The incinerator tail gas treatment flue structure according to claim 1, wherein the return flue (17) is located above the guide-out flue, the return flue (17) and the guide-out flue are horizontally arranged, the bottom of the reducing flue (3) is flush with the bottom of the flue pipe (4), the top of the reducing flue (3) is of an inclined structure, and an angle between the top and the horizontal direction is 20 ° -60 °.

Description

Incineration device tail gas treatment flue structure Technical Field The invention belongs to the technical field of flue gas treatment, and particularly relates to a flue structure for tail gas treatment of an incinerator. Background In the tail gas of a sulfur recovery device built in the past 20 years of China, after being incinerated, the content of sulfur dioxide in the discharged tail gas is usually higher, the requirement of various environmental standards on sulfur-containing waste gas cannot be met, and the high sulfur-containing waste gas is required to be introduced into alkaline washing equipment, so that the content of sulfur is reduced to be within the environmental standard range, and then the sulfur is discharged. The existing design waste gas is directly discharged into the chimney, however, in order to meet the field layout design requirement of the combustion device, the space between the combustion device and the chimney is usually smaller, the layout of a smoke extraction structure cannot be met, and the layout of the smoke alkaline washing device is inconvenient, so that the construction difficulty and cost of the alkaline washing equipment are greatly improved. Disclosure of Invention The invention aims to provide a tail gas treatment flue structure of an incinerator, which can reasonably lead out flue gas treatment by penetrating a flue through a chimney body and connecting a combustion device and an alkaline washing device, thereby reducing sulfide emission. In order to achieve the above object, the present invention provides a flue structure for treating tail gas of an incinerator, the incinerator is connected with a chimney, and the flue structure comprises a guiding-out flue and a returning flue; the guide-out flue penetrates through the chimney, and two ends of the guide-out flue are respectively connected with the incineration device and the alkaline washing device; one end of the return flue is connected with the alkaline washing device, and the other end of the return flue extends into the chimney. Preferably, the guiding-out flue comprises a shrinkage flue, a flue pipe and a flue gas guiding-out pipe which are sequentially communicated, wherein the open end of the shrinkage flue is connected with the tail flue of the incineration device, the narrow end of the shrinkage flue is connected with the flue pipe, one end of the flue gas guiding-out pipe is positioned in the chimney and is connected with the flue pipe, and the other end of the flue gas guiding-out pipe penetrates through the side wall of the chimney and is connected with the alkaline washing device. Preferably, a first through hole for the flue gas eduction tube to pass through and a second through hole for the return flue to pass through are formed in the side wall of the chimney, an annular first connecting piece is arranged on the outer side of the first through hole in the axial direction, a first flange piece is connected with the first connecting piece, a first fixing flange connected with the first flange piece is arranged on the flue gas eduction tube, an annular second connecting piece is arranged on the outer side of the second through hole in the axial direction, the second flange piece is connected with the second connecting piece, and the return flue is provided with a second fixing flange connected with the second flange piece. Preferably, a first heat insulation blanket is filled between the inner periphery of the first connecting piece and the outer wall of the smoke extraction pipe and between the inner periphery of the second connecting piece and the outer wall of the return flue, and a second heat insulation blanket is filled between the hole wall of the first through hole and the smoke extraction pipe and between the hole wall of the second through hole and the return flue in a sealing manner. Preferably, the connecting steel plate is arranged on the outer wall of the chimney, the first connecting piece and the second connecting piece are both in welded connection with the connecting steel plate, a first sealing band is arranged between the first flange piece and the first fixing flange, and a second sealing band is arranged between the second flange piece and the second fixing flange. Preferably, one end of the flue gas eduction tube is sleeved with a third flange and a third annular connecting piece, the third connecting piece is connected with the third flange, and one end of the flue pipe is provided with a third fixing flange connected with the third flange. Preferably, a third insulation blanket is filled between the inner periphery of the third connecting piece and the outer wall of the flue pipe, and a third sealing band is arranged between the third flange piece and the third fixing flange. Preferably, the inner wall or the outer wall of the flue pipe is provided with an insulating layer. Preferably, the caliber of the open end of the reducing flue is matched with the caliber of the tai