CN111603899A

CN111603899A - Flue gas treatment tower of garbage incinerator

Info

Publication number: CN111603899A
Application number: CN202010602288.5A
Authority: CN
Inventors: 朱善银; 李�荣; 黄术翠
Original assignee: Zhejiang Weiming Environment Protection Co ltd
Current assignee: Wenzhou Weiming environmental protection energy Co.,Ltd.
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2020-09-01

Abstract

The invention discloses a flue gas treatment tower of a garbage incinerator, relating to the technical field of flue gas purification treatment and comprising a tower body, an inlet flue, an outlet flue and a conical hopper, wherein the conical hopper is arranged at the lower end of the tower body, the inlet flue is tangentially connected with the side surface of the lower part of the tower body, and the outlet flue is arranged at the upper end of the tower body. The structure adopted by the invention enables the flue gas to enter tangentially and rise spirally, and fully contact with the ammonia water forming a water film, thereby achieving the effects of deacidification, dust removal and partial denitration; meanwhile, the liquid caustic soda spraying achieves the effect of secondary deacidification; considering that the smoke components are complex and the corrosion to the tower wall is serious, the inner enamel ceramic coating is adopted, so that the material cost is prevented from being greatly increased; due to the arrangement of the herringbone baffle, the problem that water is carried by the flue gas is solved, and the corrosion of the flue gas to a subsequent pipeline is avoided. In conclusion, the flue gas treatment tower achieves the functions of deacidification, dust removal and partial denitration, so that the flue gas is discharged up to the standard.

Description

Flue gas treatment tower of garbage incinerator

Technical Field

The invention relates to the technical field of flue gas purification treatment, in particular to a flue gas treatment tower for purifying tail flue gas of a garbage incinerator.

Background

According to the national environmental protection standard, the smoke components of the existing garbage incinerator after being subjected to neutralization tower, activated carbon adsorption and cloth bag dust removal can basically meet the environmental protection emission requirement. However, with the improvement of environmental protection standards, the arrangement of SCR and wet deacidification equipment at the tail of the boiler is imperative. The configuration of SCR and wet deacidification equipment not only increases the equipment investment cost, but also greatly improves the operation cost due to a series of overhaul and shutdown conditions caused by the problems of catalyst blockage, failure and the like, so that whether a device with multiple functions of deacidification, denitration, dust removal and the like can be provided to partially replace the functions of the equipment becomes a difficult problem.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides the flue gas treatment tower from the viewpoints of not only enabling the tail flue gas emission of the garbage incinerator to reach the emission standard, but also ensuring long-term stable operation and reducing the furnace shutdown condition. The specific technical scheme is as follows:

a flue gas treatment tower of a garbage incinerator comprises a tower body, an inlet flue, an outlet flue and a conical hopper, wherein the conical hopper is arranged at the lower end of the tower body, the inlet flue is tangentially connected with the side face of the lower portion of the tower body, and the outlet flue is arranged at the upper end of the tower body. The upper part of the tower body is provided with a liquid caustic soda spray pipe and a bending nozzle, and an annular main pipe is arranged outside the tower body. The bending nozzle is connected with the annular main pipe, and ammonia water is sprayed out from the bending nozzle through the annular main pipe to form a water film. Two layers of herringbone baffles are arranged in the outlet flue.

Furthermore, the tower body and the conical hopper are internally provided with ceramic coatings.

Furthermore, the liquid caustic soda spray pipe is bent downwards at the center of the tower body, the lower end of the liquid caustic soda spray pipe is welded with a sealing plate, and a plurality of rows of spray holes are uniformly distributed in the vertical section.

Further, the herringbone baffle is made of a V-shaped glass fiber plate.

The invention has the following beneficial effects:

1. the flue gas treatment tower adopts an ammonia water ring tower body to enter tangentially and flows down along the inner wall to form an even water film.

2. The flue gas treatment tower adopts the tangential flattening connection of the inlet flue, ensures that the flue gas enters the tower body and then spirally rises along the wall surface, increases the full contact with a water film on the tower wall, and improves the deacidification, the dedusting and the partial denitration (absorbing NO in the flue gas)₂) While removing part of the dioxin adhering to the smoke.

3. The liquid caustic soda solution of the flue gas treatment tower is sprayed through the uniformly distributed spray holes on the spray pipe which extends into the center of the tower body, so that the full mixing reaction with the flue gas is ensured, and the effect of secondary deacidification is achieved.

4. Two layers of herringbone baffles are arranged in an outlet flue of the flue gas treatment tower, so that water particle micro-droplets can impact on the baffles, and the entrained fog drops are reduced as much as possible.

5. The ceramic sprayed on the inner wall of the tower body of the flue gas treatment tower has the characteristics of acid and alkali resistance, scale prevention, small running resistance and the like, and the service life of the tower body is ensured.

6. Compared with a water film dust collector with the same scale, the water consumption of the flue gas treatment tower is only 1/4-1/2 of the latter, and the produced sewage can be used as water for fly ash solidification.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic top view of the cross section A-A of the present invention;

FIG. 3 is a schematic top view of the cross section B-B of the present invention;

FIG. 4 is a schematic top view of the cross section C-C of the present invention.

The reference numerals in the drawings mean: the method comprises the following steps of 1-tower body, 2-inlet flue, 3-outlet flue, 4-conical hopper, 5-liquid caustic soda spray pipe, 6-bending nozzle, 7-annular header pipe, 8-herringbone baffle, 9-ceramic coating, 10-closing plate and 11-glass fiber board.

Detailed Description

The invention will be further elucidated with reference to the drawing.

As shown in fig. 1-4, the flue gas treatment tower of the garbage incinerator comprises a tower body 1, an inlet flue 2, an outlet flue 3 and a conical hopper 4, wherein the conical hopper 4 is arranged at the lower end of the tower body 1, the inlet flue 2 is tangentially connected with the side surface of the lower part of the tower body 1, and the outlet flue 3 is arranged at the upper end of the tower body 1. The upper part of the tower body 1 is provided with a liquid caustic soda spray pipe 5 and a bending nozzle 6, and an annular main pipe 7 is arranged outside the tower body 1. The bending nozzle 6 is connected with the annular header pipe 7, and ammonia water is sprayed out from the bending nozzle 6 through the annular header pipe 7 to form a water film. Two layers of herringbone baffles 8 are arranged in the outlet flue 3.

The tower body 1 and the conical hopper 4 are internally provided with ceramic coatings 9.

The liquid caustic soda spray pipe 5 is bent downwards at the center of the tower body 1, the lower end of the liquid caustic soda spray pipe is welded with a sealing plate 10, and a plurality of rows of spray holes are uniformly distributed in the vertical section.

The chevron baffle 8 is made of a V-shaped fiberglass plate.

Claims

1. The utility model provides a waste incinerator's flue gas treatment tower, includes tower body (1), import flue (2), export flue (3) and tapered hopper (4), its characterized in that: the cone-shaped hopper (4) is arranged at the lower end of the tower body (1), the inlet flue (2) is tangentially connected with the side surface of the lower part of the tower body (1), the outlet flue (3) is arranged at the upper end of the tower body (1), the upper part of the tower body (1) is provided with a liquid caustic soda spray pipe (5) and a bending nozzle (6), and an annular main pipe (7) is arranged outside the tower body (1); the bending nozzle (6) is connected with the annular main pipe (7), and two layers of herringbone baffles (8) are arranged in the outlet flue (3).

2. The flue gas treatment tower of a garbage incinerator according to claim 1, characterized in that the tower body (1) and the cone-shaped hopper (4) are both internally lined with ceramic coating (9).

3. The flue gas treatment tower of a garbage incinerator according to claim 1, characterized in that the liquid caustic soda nozzles (5) are bent downward at the center of the tower body (1), the lower end is welded with a closing plate (10), and a plurality of rows of nozzles are uniformly distributed on the vertical section.

4. A flue gas treatment tower for a waste incinerator according to claim 1, characterized in that said chevron-shaped baffles (8) are made of V-shaped glass fibre plates (11).