CN203842494U - Washing and purifying device of thermal power plant organic amine desulfurization flue gas - Google Patents

Washing and purifying device of thermal power plant organic amine desulfurization flue gas Download PDF

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Publication number
CN203842494U
CN203842494U CN201420172702.3U CN201420172702U CN203842494U CN 203842494 U CN203842494 U CN 203842494U CN 201420172702 U CN201420172702 U CN 201420172702U CN 203842494 U CN203842494 U CN 203842494U
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China
Prior art keywords
prewashing
absorption tower
flue gas
power plant
purifying device
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Expired - Lifetime
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CN201420172702.3U
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Chinese (zh)
Inventor
李敬东
钟洪玲
夏明�
孟辉
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Guoneng Longyuan Environmental Protection Co Ltd
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Beijing Guodian Longyuan Environmental Engineering Co Ltd
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Abstract

The utility model discloses a washing and purifying device of thermal power plant organic amine desulfurization flue gas. The device is a prewashing absorption tower, wherein the upper part of the prewashing absorption tower is an absorption section, and the lower part of the prewashing absorption tower is a prewashing section; a liquid collecting plate, an electrostatic demister, a deflecting type demister and a spraying layer are sequentially arranged on the absorption section from top to bottom; a power plant flue gas inlet and a water glass dosing opening are formed in the bottom of the prewashing section; a wastewater inlet and a main body circulating water inlet of an amine liquid purification system are formed in the upper end of the prewashing section. The washing and purifying device of the thermal power plant organic amine desulfurization flue gas, disclosed by the utility model, is suitable for treating the power plant flue gas containing relatively high content of acidic gas such as fluorine and the like, can be used for effectively improving the desulfurization efficiency, protecting the desulfurization equipment and saving the running and investment cost, and is provided with a hydraulic stirring and removal system so as to effectively prevent dust and heavy metals from being accumulated in the prewashing tower.

Description

The washing purifying device of a kind of thermal power plant organic amine desulfurization fume
Technical field
The utility model relates to chemical technology field, relates in particular to the washing purifying device of a kind of thermal power plant organic amine desulfurization fume.
Background technology
Conventional calcium method sulfur removal technology is not also suitable for thermal power plant, sulphur coal area, and huge operating cost and huge transport pressure become the great burden of calcium method desulfurizing item operation; And organic amine sulfur removal technology transport intensity is low, operating cost is low, and produces the accessory substance of better economy, can, effectively by sulfur dioxide recovery, turn waste into wealth.Economic benefit, environmental benefit and the social benefit of amine process desulfurizing item is all highly significant, so in sulphur coal area, organic amine sulfur removal technology is more applicable than conventional calcium method sulfur removal technology.
In order to improve desulfuration efficiency, further reduce cigarette temperature to saturation temperature, reduce dust and the impact of harmful components on desulphurization system in flue gas, flue gas, before entering absorption tower, need carry out washing, purifying by prewashing column.The pretreatment system form of desulphurization system has and prewashing column is set before absorption tower, Venturi scrubber is set at home: by flue gas pretreatment, conventionally can make 120-180 DEG C of high-temperature flue gas be cooled to 80 DEG C of left and right, make flue gas humidification, be conducive to improve SO 2absorptivity plays dust removing effects simultaneously, efficiency of dust collection 95% left and right.But for sulfur-bearing, fluorinated hydrogen, the larger flue gas of hydrogen chloride, traditional prewashing system, easily causes the enrichment of oxious component, make more corrosivity composition enter into absorption tower, the corrosion of acceleration equipment and the inefficacy of desulfurizing agent, reduce desulfuration efficiency.
Utility model content
Directly enter the problem of desulfuration absorbing tower infringement desulphurization system for solving the excessive dust that contains in the boiler smoke pretreatment stage flue gas that power plant sulfur-bearing, fluorinated hydrogen, hydrogen chloride are larger and fluorine, chlorion, the utility model provides a kind of prewashing tower and absorption tower unification body, and is applicable to the washing purifying device of thermal power plant's organic amine desulfurization fume of sulfur-bearing, fluorinated hydrogen, boiler smoke that hydrogen chloride is larger.
The technical scheme that the utility model is taked is:
The washing purifying device of thermal power plant of the present utility model organic amine desulfurization fume is a prewashing absorption tower, and described top, prewashing absorption tower is absorber portion, and bottom is pre-wash section; Absorber portion is disposed with liquid collection dish, electrostatic precipitator, deflector type demister and spraying layer from top to bottom; Pre-wash section bottom is provided with power-plant flue gas entrance and waterglass dosing mouth; Pre-wash section upper end is provided with waterwater entrance and the main body recirculated water entrance of amine purification system.
The bottom on described prewashing absorption tower is provided with hydraulic agitator, and hydraulic agitator is connected with the hydraulic mixing pump of device outside by pipeline, and hydraulic mixing pump is connected to again the bottom on prewashing absorption tower by pipeline.
Bottom, described prewashing absorption tower is connected by pipeline with the dredge pump that is arranged on outside, leads to Waste Water Treatment.
Bottom, described prewashing absorption tower is connected by pipeline with the circulating pump that is arranged on outside, and the other end is connected to the spraying layer top on prewashing absorption tower by pipeline.
The absorber portion on described prewashing absorption tower and the aspect ratio of pre-wash section are 0.57.
Spacing between described deflector type demister and spraying layer is 14.5m.
Flue gas enters prewashing tower from power-plant flue gas entrance, and loop slurry sprays from top, fully mixes with flue gas is reverse, after the mode that the flue gas after pre-wash adds electrostatic precipitator through demister is removed drop and sulfur trioxide, enters absorber portion.
Enter in the stock tank at the bottom of tower with the mixed slurries of flue gas, the slurries part in stock tank is got to spraying layer by circulating pump by loop slurry, and flue gas is sprayed.Totally three of circulating pumps, each corresponding one deck spraying layer; Circulating pump and spraying layer adopt 21 of operations for subsequent use, and stock tank is equipped with hydraulic agitator; The waterglass medicament that to add hydraulic mixing pump and be in order to make to add fully reacts with fluorine ion in washings, effectively removes fluorine ion; Adding circulating pump is the circulating ratio in order to improve prewashing column, effectively removes the materials such as impurity in flue gas, hydrochloric acid, hydrofluoric acid.
For preventing the enrichment of fluorine ion in loop slurry, affect the absorption of recirculated water to hydrofluoric acid in flue gas and hydrochloric acid.Waterglass dosing mouth is set, water glass solution is added in prewashing column washing slurries, waterglass is fully reacted with the hydrogen fluoride in flue gas, generate prodan and be dissolved in prewashing column slurries, thereby remove the hydrogen fluoride in flue gas.
The water yield of taking away for supplementing smoke evaporative and discharge of wastewater, pre-wash system is carried out moisturizing, and a moisturizing part derives from main body Wastewater Form Circulating Cooling Water, and a part derives from the discharge of wastewater of amine purification device.
In order to prevent the accumulation of dust and heavy metal in prewashing tower, desulfurization wastewater treatment system is set, pre-wash technique is provided with waste water excavationg pump, separates through hydrocyclone, and prewashing column is returned in overflow, and underflow is sent to Waste Water Treatment.
The utility model has obvious superiority: 1, make the flow process of amine process desulfurization acid-making process become more clear simple (flue gas approach is clear distinct from bottom to up), in economy, also save to some extent; 2, compared with arranging respectively with double tower, the utility model is single tower structure, has reduced basis and attached equipment and platform etc., floor space is significantly less than double tower, and apparatus arrangement around and pipeline are all more convenient, so place connection and reasonable arrangement, can save space, be conducive to the layout of other equipment; 3, compared with arranging respectively with double tower, in technology arrangement, the utility model is single tower structure, thus reduce the quantity of flue and pipeline, and due to the minimizing of flue and pipeline, make energy consumption and resistance also have corresponding reduction, good economy performance.
The utility model is that one is applied in the desulfurizing tower of (for the production of sulfuric acid) in amine process desulfurization acid making system, especially be noted that, the utility model is applied in amine process desulfurization acid making system, what this system was produced is sulfuric acid, compared with the spray column of using with common on the market production chemical fertilizer, belong to complete different types of desulfurizing tower, so can not analogy.
Good effect of the present utility model is as follows:
1) washing purifying device of thermal power plant of the present utility model organic amine desulfurization fume is suitable for processing the fluorine-containing higher power-plant flue gas of acid gas-containing that waits, and effectively improves desulfuration efficiency and the protection to desulphurization plant, saves operation and cost of investment.
2) due to waterglass and hydrogen fluoride reaction very fast, in the time that flue gas contacts with pre-wash slurries, hydrogen fluoride and waterglass generate rapidly prodan and are dissolved in pre-wash slurries, but prewashing column rises to more than 95% hydrofluoric clearance in flue gas.
3) washing purifying device of thermal power plant of the present utility model organic amine desulfurization fume is equipped with hydraulic mixing and removal system, effectively prevents the accumulation of dust and heavy metal in prewashing tower.
4) moisturizing of the washing purifying device of thermal power plant of the present utility model organic amine desulfurization fume has effectively utilized the waste water of organic amine system purification system, has saved water and has reduced discharge.
Therefore, the utility model has obvious superiority: 1, make the flow process of amine process desulfurization acid-making process become more clear simple (flue gas approach is clear distinct from bottom to up), in economy, also save to some extent; 2, compared with arranging respectively with double tower, the utility model is single tower structure, has reduced basis and attached equipment and platform etc., floor space is significantly less than double tower, and apparatus arrangement around and pipeline are all more convenient, so place connection and reasonable arrangement, can save space, be conducive to the layout of other equipment; 3, compared with arranging respectively with double tower, in technology arrangement, the utility model is single tower structure, thus reduce the quantity of flue and pipeline, and due to the minimizing of flue and pipeline, make energy consumption and resistance also have corresponding reduction, good economy performance.
The utility model is that one is applied in the desulfurizing tower of (for the production of sulfuric acid) in amine process desulfurization acid making system, especially be noted that, the utility model is applied in amine process desulfurization acid making system, what this system was produced is sulfuric acid, compared with the spray column of using with common on the market production chemical fertilizer, belong to complete different types of desulfurizing tower, so can not analogy.
Brief description of the drawings
Fig. 1 is the schematic diagram of the washing purifying device of thermal power plant of the present utility model organic amine desulfurization fume.
1, prewashing absorption tower, 2, hydraulic agitator, 3, hydraulic mixing pump, 4, dredge pump, 5, circulating pump, 6, spraying layer, 7, deflector type demister, 8, electrostatic precipitator, 9, liquid collection dish, 10, power-plant flue gas entrance, 11, waterglass dosing mouth, 12, the waterwater entrance of amine purification system, 13, main body recirculated water entrance.
Detailed description of the invention
The following examples are to describe in further detail of the present utility model.
As shown in Figure 1: the washing purifying device of thermal power plant of the present utility model organic amine desulfurization fume is a prewashing absorption tower 1, and 1 top, prewashing absorption tower is absorber portion, and bottom is pre-wash section; Absorber portion is disposed with liquid collection dish 9, electrostatic precipitator 8, deflector type demister 7 and spraying layer 6 from top to bottom; Pre-wash section bottom is provided with power-plant flue gas entrance 10 and waterglass dosing mouth 11; Pre-wash section upper end is provided with waterwater entrance 12 and the main body recirculated water entrance 13 of amine purification system.
The absorber portion on prewashing absorption tower 1 and the aspect ratio of pre-wash section are 0.57.
Spacing between deflector type demister 7 and spraying layer 6 is 14.5m.
The bottom on prewashing absorption tower 1 is provided with hydraulic agitator 2.
Hydraulic agitator 2 is connected with the hydraulic mixing pump 3 of device outside by pipeline, and hydraulic mixing pump 3 is connected to again the bottom on prewashing absorption tower 1 by pipeline.
1 bottom, prewashing absorption tower is connected by pipeline with the dredge pump 4 that is arranged on outside, leads to Waste Water Treatment.
1 bottom, prewashing absorption tower is connected by pipeline with the circulating pump 5 that is arranged on outside, and the other end is connected to spraying layer 6 tops on prewashing absorption tower 1 by pipeline.
Flue gas enters prewashing tower from power-plant flue gas entrance 10, and loop slurry sprays from top, fully mixes with flue gas is reverse, and the flue gas after pre-wash after electrostatic precipitator 8 and deflector type demister 7 are removed drop and sulfur trioxide, enters absorber portion.Enter in the stock tank at the bottom of tower with the mixed slurries of flue gas, the slurries part in stock tank is got to spraying layer 6 by circulating pump 5 by loop slurry, and flue gas is sprayed; A part is discharged to Waste Water Treatment by sewage water discharge pump 4; Another part is uniformly mixed stock tank by hydraulic mixing pump 3; In this process, waterglass dosing mouth 11 adds stock tank; Due to smoke evaporative and blowdown, the waterwater entrance 12 that the waste water that system enters main body recirculated water entrance 13 and amine purification system by main body recirculated water enters amine purification system carries out moisturizing.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that in the situation that not departing from principle of the present utility model and spirit and can carry out multiple variation, amendment, replacement and modification to these embodiment, scope of the present utility model is limited by claims and equivalent thereof.

Claims (3)

1. a washing purifying device for thermal power plant's organic amine desulfurization fume, is characterized in that: this device is a prewashing absorption tower (1), and described top, prewashing absorption tower (1) is absorber portion, and bottom is pre-wash section; Absorber portion is disposed with liquid collection dish (9), electrostatic precipitator (8), deflector type demister (7) and spraying layer (6) from top to bottom; Pre-wash section bottom is provided with power-plant flue gas entrance (10) and waterglass dosing mouth (11); Pre-wash section upper end is provided with waterwater entrance (12) and the main body recirculated water entrance (13) of amine purification system;
The bottom on described prewashing absorption tower (1) is provided with hydraulic agitator (2), and described hydraulic agitator (2) is connected with the hydraulic mixing pump (3) of device outside by pipeline, and hydraulic mixing pump (3) is connected to again the bottom of prewashing absorption tower (1) by pipeline;
The bottom on described prewashing absorption tower (1) is connected by pipeline with the dredge pump (4) that is arranged on outside, leads to Waste Water Treatment;
The bottom on described prewashing absorption tower (1) is connected by pipeline with the circulating pump (5) that is arranged on outside, and the other end is connected to spraying layer (6) top of prewashing absorption tower (1) by pipeline.
2. washing purifying device as claimed in claim 1, is characterized in that: the absorber portion on described prewashing absorption tower (1) and the aspect ratio of pre-wash section are 0.57.
3. washing purifying device as claimed in claim 1, is characterized in that: the spacing between described deflector type demister (7) and spraying layer (6) is 14.5m.
CN201420172702.3U 2014-04-11 2014-04-11 Washing and purifying device of thermal power plant organic amine desulfurization flue gas Expired - Lifetime CN203842494U (en)

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CN201420172702.3U CN203842494U (en) 2014-04-11 2014-04-11 Washing and purifying device of thermal power plant organic amine desulfurization flue gas

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105107320A (en) * 2015-08-25 2015-12-02 大连理工大学 Jet flow ionizer coupling mechanical demister used for wet process flue gas desulfurization

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105107320A (en) * 2015-08-25 2015-12-02 大连理工大学 Jet flow ionizer coupling mechanical demister used for wet process flue gas desulfurization
CN105107320B (en) * 2015-08-25 2017-01-25 大连理工大学 Jet flow ionizer coupling mechanical demister used for wet process flue gas desulfurization

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Address after: 100039 room 901, 9 / F, building 1, yard 16, West Fourth Ring Middle Road, Haidian District, Beijing

Patentee after: Guoneng Longyuan environmental protection Co.,Ltd.

Address before: 100039 room 911, 1 building, 16 West Fourth Ring Road, Haidian District, Beijing.

Patentee before: BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENGINEERING Co.,Ltd.

CP03 Change of name, title or address
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Granted publication date: 20140924

CX01 Expiry of patent term