CN-120586550-B - Multistage treatment device for flue gas of coal-fired boiler

CN120586550BCN 120586550 BCN120586550 BCN 120586550BCN-120586550-B

Abstract

The invention discloses a multistage treatment device for flue gas of a coal-fired boiler, which comprises a primary filter, wherein at least two groups of filter channels are arranged, a plurality of filter plates are arranged in each group of filter channels, the two groups of filter channels are configured to independently, jointly or crossly convey the flue gas, an air inlet of a bag-type dust collector is communicated with an air outlet of the primary filter, an air inlet of a desulfurizing tower is communicated with an air outlet of the bag-type dust collector, a pipeline defogging mechanism is arranged in the desulfurizing tower, the pipeline defogging mechanism comprises a plurality of vertically arranged defogging pipes, spiral defogging blades are arranged in each defogging pipe, the flue gas is subjected to multistage treatment through the primary filter, the bag-type dust collector and the desulfurizing tower, and the flue gas is independently, jointly or crossly conveyed by utilizing the cooperation of a plurality of groups of filter channels so as to flexibly use different working conditions, the defogging pipes are matched with the spiral defogging blades to reduce the installation space, and simultaneously, the spiral defogging blades guide the flue gas to spirally rise along the surface of the spiral defogging blades, so that better separation effect is obtained.

Inventors

WANG PINGZHOU
XIA YINGHONG
WANG XIAOPING

Assignees

南京辰昊环境科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250619

Claims (10)

1. A multi-stage treatment device for flue gas of a coal-fired boiler, comprising: The primary filter is provided with a primary filter air inlet and a primary filter air outlet, at least two groups of filter channels are arranged between the primary filter air inlet and the primary filter air outlet, a plurality of filter plates are arranged in each group of filter channels, a movable partition plate is arranged between every two adjacent filter plates and is configured to be communicated with or isolate the two adjacent filter plates, and when isolating the two adjacent filter plates, the two corresponding groups of filter channels are communicated at the corresponding movable partition plates, so that the independent, common and cross flue gas conveying of the two groups of filter channels is realized; The air inlet of the bag-type dust collector is communicated with the air outlet of the primary filter; Desulfurizing tower, its air inlet with the gas outlet intercommunication of sack cleaner, just the desulfurizing tower has set gradually between desulfurizing tower air inlet and desulfurizing tower gas outlet and has sprayed layer and defogging layer, set up pipeline defogging mechanism in the defogging layer, pipeline defogging mechanism includes the defogging pipe of a plurality of vertical settings, every all install spiral defogging leaf in the defogging pipe, and spiral defogging She Waijuan with the inside laminating of defogging pipe, spiral defogging leaf is used for guiding the flue gas to follow spiral defogging leaf surface spiral and rises.
2. The multi-stage treatment device for flue gas of a coal-fired boiler as set forth in claim 1, wherein a first filter passage and a second filter passage are provided in the primary filter, a plurality of filter plates are provided in the first filter passage and the second filter passage at equal intervals, and the first filter passage and the second filter passage are communicated at corresponding movable partition plates when the two adjacent filter plates are isolated.
3. The multistage treatment device for flue gas of coal-fired boiler as set forth in claim 2, wherein the first and second filter passages are disposed up and down and are each independently communicated with the air inlet of the primary filter, and A cross plate is arranged between the first filtering channel and the second filtering channel, through grooves are formed in the cross plate, and each movable partition plate is configured to slide in the through groove to enter the first filtering channel and/or enter the second filtering channel.
4. The multistage treatment device for flue gas of coal-fired boiler according to claim 3, wherein the movable partition plates are sequentially distributed from the air inlet of the primary filter to the air outlet of the primary filter, the bottoms of the odd movable partition plates are connected through a first frame, the bottoms of the even movable partition plates are connected through a second frame, and And a lifting mechanism is arranged in the primary filter and is used for lifting the first frame body and/or the second frame body.
5. The multi-stage treatment device for flue gas of a coal-fired boiler as set forth in claim 1, wherein at least one dust removing cavity is arranged in the bag-type dust remover, the air outlet of the primary filter is communicated with any one or more dust removing cavities, and a dust removing filter bag is arranged in each dust removing cavity.
6. The multi-stage treatment device for flue gas of a coal-fired boiler as recited in claim 5, wherein the gas outlet of the bag-type dust collector is externally connected with a gas flow monitoring device, and the gas flow monitoring device is configured to monitor the gas flow of the gas outlet of the bag-type dust collector in real time.
7. The multistage treatment device for flue gas of coal-fired boiler as claimed in claim 1, wherein two spiral defogging leaves are arranged in the defogging tube along the circumferential direction, and the two spiral defogging leaves are orthographically projected into a circle.
8. The multi-stage treatment device for flue gas of coal-fired boiler as set forth in claim 1 or 7, wherein each portion of the spiral defogging leaves is inclined from the center of the defogging tube to the edge.
9. The multi-stage treatment device for flue gas of a coal-fired boiler as recited in claim 8, wherein a round tube demisting layer is arranged at the bottom of the pipeline demisting mechanism.
10. The multi-stage treatment device for flue gas of a coal-fired boiler as recited in claim 8, wherein a cavity is formed in the wall of the demisting pipe, a condensing pipe network is arranged at the top end of the pipeline demisting mechanism, the output end of the condensing pipe network is communicated with the top of the cavity of each demisting pipe, and the input end of the condensing pipe network is communicated with the bottom of the cavity of each demisting pipe.

Description

Multistage treatment device for flue gas of coal-fired boiler Technical Field The invention relates to the technical field of coal-fired flue gas treatment, in particular to a multi-stage treatment device for coal-fired boiler flue gas. Background In the operation process of the coal-fired boiler, a great deal of pollutants, especially sulfur dioxide, are contained in the flue gas, the gas can cause great harm to the environment and human health, the existing flue gas multistage treatment device generally comprises a plurality of links of dust removal, desulfurization and the like, the different flue gas treatment systems are required to be coordinated with each other so as to ensure that the pollutants in the flue gas are effectively removed, dust removal equipment comprises a bag-type dust remover and the like, and desulfurization equipment comprises a desulfurizing tower and the like, but the dust removal mode of the existing dust removal equipment is single, the dust removal work under various working conditions cannot be satisfied, and as the working time of part of the original flue gas is increased, the bag-type dust remover is easy to block, the flue gas is required to be filtered after self-cleaning, the efficiency is reduced, in addition, the defogging operation is required to be carried out on the flue gas after desulfurization in the desulfurizing equipment, the existing defogging device comprises a plate-type demister, a ridge demister and the like, the defogging effect of the plate-type demister is generally required to be overlapped by a plurality of layers so as to improve the defogging effect, the ridge demister occupies a large space, and the height of the desulfurizing tower is further increased, and the flue gas multistage treatment device of the coal-fired boiler is required to solve the problems. Disclosure of Invention The invention aims to provide a multistage treatment device for flue gas of a coal-fired boiler, which can effectively solve the problems in the background art. In order to solve the technical problems, the invention adopts the following technical scheme that the multi-stage treatment device for the flue gas of the coal-fired boiler comprises: The primary filter is provided with a primary filter air inlet and a primary filter air outlet, at least two groups of filter channels are arranged between the primary filter air inlet and the primary filter air outlet, a plurality of filter plates are arranged in each group of filter channels, and the two groups of filter channels are configured to independently, jointly or crossly convey flue gas; The air inlet of the bag-type dust collector is communicated with the air outlet of the primary filter; Desulfurizing tower, its air inlet with the gas outlet intercommunication of sack cleaner, just the desulfurizing tower has set gradually between desulfurizing tower air inlet and desulfurizing tower gas outlet and has sprayed layer and defogging layer, set up pipeline defogging mechanism in the defogging layer, pipeline defogging mechanism includes the defogging pipe of a plurality of vertical settings, every all install spiral defogging leaf in the defogging pipe, and spiral defogging She Waijuan with the inside laminating of defogging pipe, spiral defogging leaf is used for guiding the flue gas to follow spiral defogging leaf surface spiral and rises. Preferably, a first filtering channel and a second filtering channel are arranged in the primary filter, a plurality of filtering plates are arranged in the first filtering channel and the second filtering channel at equal intervals, a movable partition plate is arranged between two adjacent filtering plates, the movable partition plate is configured to be communicated with or isolate the two adjacent filtering plates, and when the two adjacent filtering plates are isolated, the first filtering channel and the second filtering channel are communicated at the corresponding movable partition plate. Preferably, the first filter passage and the second filter passage are arranged up and down and each of the first filter passage and the second filter passage is independently communicated with the air inlet of the primary filter, and A cross plate is arranged between the first filtering channel and the second filtering channel, through grooves are formed in the cross plate, and each movable partition plate is configured to slide in the through groove to enter the first filtering channel and/or enter the second filtering channel. Preferably, from the air inlet of the primary filter to the air outlet of the primary filter, the movable partition plates are distributed in sequence, the bottoms of the odd movable partition plates are connected through a first frame body, the bottoms of the even movable partition plates are connected through a second frame body with the same structure, and And a lifting mechanism is arranged in the primary filter and is used for lifting the first frame body and/o