CN203610038U - Efficient combined purifying tower for performing desulfurization and wet-type electrostatic dust collection on coal-fired flue gas - Google Patents

Efficient combined purifying tower for performing desulfurization and wet-type electrostatic dust collection on coal-fired flue gas Download PDF

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Publication number
CN203610038U
CN203610038U CN201320781362.XU CN201320781362U CN203610038U CN 203610038 U CN203610038 U CN 203610038U CN 201320781362 U CN201320781362 U CN 201320781362U CN 203610038 U CN203610038 U CN 203610038U
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China
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tower
desulfurization
coal
flue gas
dedusting
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CN201320781362.XU
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Chinese (zh)
Inventor
李春萱
王红卫
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上海中芬新能源投资有限公司
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Abstract

The utility model discloses an efficient combined purifying tower for performing desulfurization and wet-type electrostatic dust collection on coal-fired flue gas. The efficient combined purifying tower is characterized in that coal-fired flue gas passing through the combined purifying tower is desulfurized firstly, and then is subjected to deep dust removal; the desulfurization and dust removal are carried out in a U-shaped dual-tower or a single tower; when the desulfurization and dust removal are carried out in the U-shaped dual-tower, one tower is used for implementing desulfurization, and the other tower is used for implementing dust removal; when the desulfurization and dust removal are carried out in the single tower, the desulfurization is carried out at the lower part of the tower, and dust removal is carried out at the upper part of the tower. According to the utility model, the desulfurization, prewashing and dust removal are carried out through a liquid column tower, and desulfurized flue gas further enters a wet-type electrostatic dust (fog) removing device to be subjected to deep dust removal and purification, so that PM (particulate matter) 2.5, SO3 acid mist and escaped gypsum fog particles, mercury pollutants and the like are further removed, and further the ultra-low emission of atmospheric pollutants in coal-fired flue gas can be realized.

Description

A kind of efficient fuel coal flue gas desulfurization and wet static dedusting combination purification tower

Technical field

The utility model relates to a kind of purifying coal-fired flue gas equipment, particularly discloses a kind of efficient fuel coal flue gas desulfurization and wet static dedusting combination purification tower, is applicable to the purification of fire coal boiler fume, integrated solution coal-fired flue gas desulfurization, PM2.5 particle, SO 3the gypsum droplet of acid mist and escape and the emission problem of mercury contaminants, realize minimum discharge, meets the high request of country to Air Pollutant Emission control.

Background technology

In recent years, China central and east continues to meet with haze, and the formation of haze is inseparable with airborne PM2.5 content, and result of study shows both at home and abroad, and coal-burning power plant's wet desulfurization system is not almost removed the ability of PM2.5 particle, to mercury and SO 3removing of aerosol etc. is also very limited, causes flue dust often to occur the phenomenon such as blue smoke, gypsum rain, and serious environment pollution, is detrimental to health.

State Council's " national environmental protection " 12 " planning " in 2011 requirement: carry out the pollutant monitoring such as ozone, fine particulates (PM2.5) in regions such as the Beijing-Tianjin wing, the Yangtze River Delta and Pearl River Deltas.On February 29th, 2012, State Council holds standing meeting, requires " ambient air quality " of issuing new revision to include PM2.5 in conventional Air Quality Evaluation.

Along with the raising that country requires Air Pollutant Emission control, new fossil-fuel power plant atmospheric pollutant emission standard (GB13223-2011) is in formal enforcement on January 1st, 2012.New emission standard requires to be all greatly improved to flue dust, sulfur dioxide, nitrogen oxidation emission control.

In order to meet new discharge standard and to solve current power plant ubiquity gypsum rain problem, process the problems such as PM2.5, blue smoke and gypsum rain in the urgent need to supporting with it system and equipment.

Summary of the invention

The purpose of this utility model is to solve the problem that prior art occurs, a kind of efficient fuel coal flue gas desulfurization and wet static dedusting combination purification tower are proposed, adopt flue gas desulfurization and wet static dedusting integrated combination formula to purify, can play desulfurization and degree of depth dustproof function simultaneously, can solve acid mist that sweetening process cannot collect, control the fine particle in flue gas, realize the minimum discharge of flue gas, and deviate from the heavy metals such as mercury.

The utility model is achieved in that a kind of efficient fuel coal flue gas desulfurization and wet static dedusting combination purification tower, it is characterized in that: in described combination purification tower, the coal-fired flue-gas of process first carries out desulfurization, carry out again degree of depth dedusting, described desulfurization and dedusting are carried out at U-shaped double tower or Dan Tazhong, while carrying out in U-shaped double tower, a tower completes desulfurization, and another tower completes dedusting, carry out carrying out desulfurization in tower bottom at Dan Tazhong, carry out dedusting on tower top.The structure of described U-shaped double tower or single tower is that the section form of tower is rectangular or circular.In described combination purification tower, the coal-fired flue-gas direction of process is identical with direction direction in the time adopting single tower desulfurization of desulfurization whitewashing fluid column, opposite direction while adopting the desulfurization of U-shaped double tower.

Flue gas of the present utility model adopts different following currents or reflux type to enter purifying column according to purifying the single tower or the double tower difference that adopt, by liquid column tower desulfurization and prewashing dedusting, the flue gas after desulfurization enters wet static dedusting (mist) device again and carries out degree of depth udst separation.Further remove PM2.5 particle, SO 3gypsum droplet and the mercury contaminants etc. of acid mist and escape, realize the minimum discharge of coal-fired flue-gas.

Operation principle of the present utility model and feature:

1), adopt liquid column tower desulfurization to carry out desulfurization and prewashing dedusting

Liquid column tower desulfurization operation principle: desulfurization shotcrete pipe is arranged in tower bottom, the bottom-up height that with high flow rate, absorption liquid slurry is sprayed onto to several meters to 10 meters of slurries, fluid column carries out twice with former flue gas and fully contacts in ascending and descending process, strengthen the contact area with flue gas, make absorbent slurry and flue gas carry out sufficient absorption reaction, can obtain high desulfurization degree.Meanwhile, liquid slurry also can be realized prewashing dedusting to flue gas, removes bulky grain thing.

2), adopt wet static dedusting (mist) device to carry out deep purifying to flue gas

Wet static dedusting (mist) device operation principle: directly water smoke is sprayed to discharge electrode and corona zone, the further atomization of charged rear division in the powerful corona field that water smoke forms at arista electrode, the impact interception of electric field force, charged water spray, absorption coalescence here, jointly powder dust particle is played to trapping effect, final powder dust particle arrives dust collecting electrode and is captured under the driving of electric field force, due to the existence of water droplet, the resistance of water is relatively little, after water droplet is combined with dust, height is declined than electric dust specific resistance, and therefore its duty can be more stable.Owing to adopting current to rinse, there is no rapping apparatus, so can not produce reentrainment of dust.Adopt wet static dedusting (mist) device to acid mist, toxic heavy metal and PM10, especially the fine dust of PM2.5 has good removal effect.

The beneficial effects of the utility model are: the utility model compact conformation, technological process is succinct, floor space is little, reduced investment.The utility model is applicable to the purification of fire coal boiler fume, the integrated gypsum droplet of coal-fired flue gas desulfurization, PM2.5 particle, SO3 acid mist and escape and the emission problem of mercury contaminants of having solved, realize minimum discharge, meet the high request of country to Air Pollutant Emission control.

Accompanying drawing explanation

Fig. 1 is the utility model embodiment 1 structural representation.

Fig. 2 is the side view of Fig. 1.

Fig. 3 is the top view of Fig. 1.

Fig. 4 is the utility model embodiment 2 structural representations.

Fig. 5 is the side view of Fig. 4.

Fig. 6 is the top view of Fig. 4.

Fig. 7 is the utility model embodiment 3 structural representations.

Fig. 8 is the side view of Fig. 7.

Fig. 9 is the top view of Fig. 7.

Figure 10 is the utility model embodiment 4 structural representations.

Figure 11 is the side view of Figure 10.

Figure 12 is the top view of Figure 10.

In figure: 1, coal-fired flue-gas entrance; 2, liquid column tower desulfurization absorption reaction section; 3, shotcrete pipe; 4, slurry pool; 5, wet static dedusting (mist) device; 6, purifying smoke outlet.

The specific embodiment

With reference to the accompanying drawings 1~12, a kind of efficient fuel coal flue gas desulfurization of the utility model and wet static dedusting combination purification tower, in combination purification tower, the coal-fired flue-gas of process first carries out desulfurization in U-shaped double tower or single tower, carry out again degree of depth dedusting, while carrying out in U-shaped double tower, a tower completes desulfurization, and another tower completes dedusting, carry out carrying out desulfurization in tower bottom at Dan Tazhong, carry out dedusting on tower top.The structure of U-shaped double tower or single tower is that the section form of tower is rectangular or circular.Direction direction identical (following current) in the time adopting single tower desulfurization of the coal-fired flue-gas direction of process and desulfurization whitewashing fluid column in combination purification tower, opposite direction (adverse current) while adopting the desulfurization of U-shaped double tower.The critical piece of wet static dedusting (mist) device that the utility model adopts is polar-plate-type or honeycomb fashion control of dust sun collection plate, electric discharge negative electrode (corona cathode line), seal and rinse-system.

Embodiment 1:

With reference to the accompanying drawings 1~3, a kind of efficient fuel coal flue gas desulfurization of the utility model and wet static dedusting combination purification tower, adopt U-shaped Double-Tower Structure, and the cross section of its tower is rectangular.The desulfurization of coal-fired flue-gas and dedusting are carried out respectively in two towers, and a tower completes desulfurization, and another tower completes dedusting.Coal-fired flue-gas enters combination purification tower by coal-fired flue-gas entrance 1, completes desulfurization in the liquid column tower desulfurization absorption reaction section 2 of liquid column tower, the opposite direction (being adverse current) of whitewashing fluid column for coal-fired flue-gas direction and desulfurization.Desulfurization is arranged in tower bottom with shotcrete pipe 3, slurries in slurry pool 4 are by the bottom-up height that with high flow rate, absorption liquid slurry is sprayed onto to several meters to 10 meters of shotcrete pipe 3, fluid column carries out twice with coal-fired flue-gas and fully contacts in ascending and descending process, strengthen the contact area with coal-fired flue-gas, make absorbent slurry and flue gas carry out sufficient absorption reaction, meanwhile, liquid slurry also can be realized prewashing dedusting to flue gas, removes bulky grain thing.Enter again wet static dedusting (mist) device 5 through flue gas after desulfurization and carry out degree of depth dedusting, wet static dedusting (mist) device 5 removes the fine dust of the acid mist in flue gas, toxic heavy metal, PM10 and PM2.5.Completing flue gas after purification exports 6 by purifying smoke and emits.

Embodiment 2:

With reference to the accompanying drawings 4~6, a kind of efficient fuel coal flue gas desulfurization of the utility model and wet static dedusting combination purification tower, adopt U-shaped Double-Tower Structure, and the cross section of its tower is rounded.

Other are with embodiment 1.

Embodiment 3:

With reference to the accompanying drawings 7~9, a kind of efficient fuel coal flue gas desulfurization of the utility model and wet static dedusting combination purification tower, adopt single tower structure, and the cross section of its tower is rectangular.The desulfurization of coal-fired flue-gas and dedusting all complete in a tower, carry out desulfurization in tower bottom, carry out dedusting on tower top.Coal-fired flue-gas direction and the direction identical (be following current) of desulfurization with whitewashing fluid column.

Other are with embodiment 1.

Embodiment 4:

With reference to the accompanying drawings 10~12, a kind of efficient fuel coal flue gas desulfurization of the utility model and wet static dedusting combination purification tower, adopt single tower structure, and the cross section of its tower is rounded.The desulfurization of coal-fired flue-gas and dedusting all complete in a tower, carry out desulfurization in tower bottom, carry out dedusting on tower top.Coal-fired flue-gas direction and the direction identical (be following current) of desulfurization with whitewashing fluid column.

Other are with embodiment 1.

Claims (3)

1. an efficient fuel coal flue gas desulfurization and wet static dedusting combination purification tower, it is characterized in that: in described combination purification tower, the coal-fired flue-gas of process first carries out desulfurization, carry out again degree of depth dedusting, described desulfurization and dedusting are carried out at U-shaped double tower or Dan Tazhong, while carrying out in U-shaped double tower, a tower completes desulfurization, and another tower completes dedusting, carry out carrying out desulfurization in tower bottom at Dan Tazhong, carry out dedusting on tower top.
2. according to a kind of efficient fuel coal flue gas desulfurization described in claim 1 and wet static dedusting combination purification tower, it is characterized in that: the section form that the structure of described U-shaped double tower or single tower is tower is rectangular or circular.
3. according to a kind of efficient fuel coal flue gas desulfurization described in claim 1 and wet static dedusting combination purification tower, it is characterized in that: in described combination purification tower, the coal-fired flue-gas direction of process is identical with direction direction in the time adopting single tower desulfurization of desulfurization whitewashing fluid column, opposite direction while adopting the desulfurization of U-shaped double tower.
CN201320781362.XU 2013-12-03 2013-12-03 Efficient combined purifying tower for performing desulfurization and wet-type electrostatic dust collection on coal-fired flue gas CN203610038U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104258683A (en) * 2014-09-30 2015-01-07 南京国电环保科技有限公司 Wet-type electric precipitation system and process based on phase-change coagulation flow-equalizing technology
CN104437870A (en) * 2014-12-24 2015-03-25 上海龙净环保科技工程有限公司 Overhead type rectangular wet electric precipitator
CN104587823A (en) * 2015-01-27 2015-05-06 无锡翱翔环保机械有限公司 Integrated device of dust removal, desulfurization and denitrification
CN105344219A (en) * 2014-08-20 2016-02-24 江苏创云环保科技有限公司 Air purification equipment
CN105435606A (en) * 2014-08-20 2016-03-30 江苏创云环保科技有限公司 Air cleaning equipment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105344219A (en) * 2014-08-20 2016-02-24 江苏创云环保科技有限公司 Air purification equipment
CN105435606A (en) * 2014-08-20 2016-03-30 江苏创云环保科技有限公司 Air cleaning equipment
CN104258683A (en) * 2014-09-30 2015-01-07 南京国电环保科技有限公司 Wet-type electric precipitation system and process based on phase-change coagulation flow-equalizing technology
CN104437870A (en) * 2014-12-24 2015-03-25 上海龙净环保科技工程有限公司 Overhead type rectangular wet electric precipitator
CN104437870B (en) * 2014-12-24 2017-01-18 上海龙净环保科技工程有限公司 Overhead type rectangular wet electric precipitator
CN104587823A (en) * 2015-01-27 2015-05-06 无锡翱翔环保机械有限公司 Integrated device of dust removal, desulfurization and denitrification

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