CN104258683B - A kind of based on Wet-type electric dust removal system and the technique of condensing equal Flow Technique containing phase transformation - Google Patents

A kind of based on Wet-type electric dust removal system and the technique of condensing equal Flow Technique containing phase transformation Download PDF

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Publication number
CN104258683B
CN104258683B CN201410522652.1A CN201410522652A CN104258683B CN 104258683 B CN104258683 B CN 104258683B CN 201410522652 A CN201410522652 A CN 201410522652A CN 104258683 B CN104258683 B CN 104258683B
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China
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wet
phase transformation
equal flow
wet electrical
dust precipitator
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CN201410522652.1A
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Chinese (zh)
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CN104258683A (en
Inventor
朱立平
谭厚章
惠润堂
申智勇
杨爱勇
庄柯
许芸
李志强
叶毅科
韦飞
孙尊强
李春香
刘海丽
熊英莹
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国电科学技术研究院
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Abstract

The invention discloses a kind of based on Wet-type electric dust removal system and the technique of condensing equal Flow Technique containing phase transformation, including desulfuration absorbing tower, demister, absorption tower exhaust pass, wet electrical dust precipitator and house outlet flue, described demister is arranged on desulfuration absorbing tower top, described absorption tower exhaust pass is positioned at above desulfuration absorbing tower and the outlet of its entrance connection demister, absorption tower exhaust pass connects described wet electrical dust precipitator, the outlet of wet electrical dust precipitator connects the entrance of house outlet flue, and the outlet of house outlet flue connects chimney;Phase transformation is installed between absorption tower exhaust pass and wet electrical dust precipitator and condenses equal flow chamber;The present invention solves traditional wet electrical dust precipitator and is difficult to charged problem to particle size is too small, improves the efficiency of dust collection of wet electrical dust precipitator, and system arrives < 5mg/m3Gas discharge standard.

Description

A kind of based on Wet-type electric dust removal system and the technique of condensing equal Flow Technique containing phase transformation

Technical field

The present invention relates to energy-conserving and environment-protective technical field, relate to a kind of based on Wet-type electric dust removal system and the work of condensing equal Flow Technique containing phase transformation Skill.

Background technology

PM level fine particle is atmospheric aerosol and the main cause of haze weather formation, PM level fine particle specific surface area Greatly, strong to noxious substance such as polycyclic aromatic hydrocarbons, atmospheric residence time length, be difficult to diffusion, to health and big compression ring The impact of border quality is the biggest.At present, the removing to PM level subparticle is administered, and causes each side to pay close attention to widely.

Burning pollutant discharge is the main source of below PM10 fine particle.Along with new " boiler Air Pollutant Emission mark Accurate " promulgation of (GB13271-2013), coal-burning boiler smoke dust discharge concentration is by original 100mg/m3It is reduced to 50mg/m3, Key area is reduced to 20mg/m3.In the face of new requirement higher dust exhausting concentration limit value, original cleaner of coal-burning boiler is Reach standard through being difficult to.

In current various novel dust removing technology, wet-esp is relatively effective a kind of measure.But, due to by one slightly , still can there is wet electrical dust precipitator to the too small particulate matter lotus of some aerosol particle or particle diameter in the impact of fine particle self property Situation about not powering on, causes cannot realizing dedusting on anode region, reduces its efficiency of dust collection.

Summary of the invention

For the defect existing for existing wet electrical dust precipitator or deficiency, it is an object of the invention to, it is provided that a kind of based on containing phase Become the Wet-type electric dust removal system condensing equal Flow Technique.

The present invention is achieved by the following technical programs:

A kind of based on the Wet-type electric dust removal system containing the phase transformation equal Flow Technique of cohesion, go out including desulfuration absorbing tower, demister, absorption tower Mouth flue, wet electrical dust precipitator and house outlet flue, described demister is arranged on desulfuration absorbing tower top, and described absorption tower goes out Mouth flue is positioned at above desulfuration absorbing tower and the outlet of its entrance connection demister, and absorption tower exhaust pass connects described wet-esp Device, the outlet of wet electrical dust precipitator connects the entrance of house outlet flue, and the outlet of house outlet flue connects chimney;Inhaling Receive and phase transformation cohesion equal flow chamber is installed between tower exhaust pass and wet electrical dust precipitator;Pending flue gas sequentially passes through desulfurization from bottom to top After equal flow chamber, wet electrical dust precipitator and house outlet flue are condensed in absorption tower, demister, absorption tower exhaust pass, phase transformation, by Chimney is discharged.

Further, described phase transformation is condensed the underface of equal flow chamber and is provided with water treating pond, the upper end open of described water treating pond with Absorption tower exhaust pass connection, and water treating pond connects with the flusher that demister carries, water treating pond and this flusher it Between be provided with flushing pump.

Further, the U-tube bundle that equal flow chamber is made up of is condensed in described phase transformation many PFA capillary array, forms this U-tube The entrance of many PFA capillary tubies of bundle is connected to a cooling water inlet, the outlet of many PFA capillary tubies be connected to one cold But water out.

Further, the many equal sweat solderings of PFA capillary tube of described composition U-tube bundle are on same PFA tube sheet.

Further, described U-tube bundle is rearranged according to stagger arrangement or in-line mode by many PFA capillary tubies, adjacent PFA The tube center distance of capillary tube is from for 20~30mm.

Further, the specification of described PFA capillary tube isOrOr other close specifications.

Further, the anode tube bank in described wet electrical dust precipitator is equilateral triangle arrangement, and the length of side of this equilateral triangle is 0.3~0.5m, height is 2.0~6.5m.

Further, the material selection epoxy resin composite material of the tube bank of the anode in described wet electrical dust precipitator.

It is a further object of the invention to provide a kind of based on the wet-esp technique containing the phase transformation equal flow chamber of cohesion, specifically wrap Include following steps:

Step 1, carries out desulfurization by pending flue gas through desulfuration absorbing tower;

Step 2, droplet and part flue dust in the flue gas obtaining step 1 are removed by demister;

Step 3, uses wet electrical dust precipitator to remove the flue dust in flue gas;

Before described step 3, also include that flue gas step 2 obtained is passed through the phase transformation equal flow chamber of cohesion and carries out condensing and scattered Step.

Further, the step of the Water Sproading obtained after condensed by flue gas is also included.

It is an advantage of the current invention that:

(1) assembly of the invention condenses equal flow chamber by increasing phase transformation at wet electrical dust precipitator entrance, and inlet flue gas is condensed phase transformation, Promoting minuteness particle cohesion, and make smoke distribution uniform, effectively solution wet electrical dust precipitator porch particle size is too small is difficult to lotus The problem of electricity, improves efficiency of dust collection, reaches fine dedusting, it is ensured that house outlet soot emissions < 5mg/m3

(2) the equal flow chamber of phase transformation cohesion is by the most alternately arranged U-tube bundle formed of many PFA capillary tubies of two kinds of specifications, and phase The tube center distance of adjacent PFA capillary tube is from for 20~30mm, and while ensureing flue gas resistance ≯ 100Pa, the design of this structure makes Flue gas flow equalizing disperses, and coordinates being passed through of outside cooling medium, it is possible to accurately controls the phase variation of saturated flue gas, makes flue gas cool-down 2~4 DEG C, sub-micron grade particle therein effectively condenses, grows up so that after flue dust enters wet scrubber, charge capacity is greatly improved.

(3) phase transformation condense equal flow chamber can solidifying water in recovered flue gas to water treating pond, flue gas condensed water is through processing, by flushing pump Send back to top, absorption tower use as mist eliminator flushing water, energy-conserving and environment-protective.

(4) present invention can efficient removal fine particle and aerosol, solve flue dust, gypsum rain, aerosol, SO comprehensively3、 The various contaminant problems such as hydrargyrum, PAHs.

Accompanying drawing explanation

Fig. 1 is the structural representation based on the Wet-type electric dust removal system condensing equal Flow Technique containing phase transformation of the present invention.

Fig. 2 is the structural representation that equal flow chamber is condensed in phase transformation.

Detailed description of the invention

Follow technical scheme, The present invention gives embodiment, it should be noted that the following stated is only the present invention's Specific embodiment, but the technical characteristic of the present invention is not limited thereto, any those skilled in the art in the field of the invention, Change or the modification made all are contained among the scope of the claims of the present invention.

Embodiment 1

As it is shown in figure 1, the present embodiment based on containing phase transformation condense equal Flow Technique Wet-type electric dust removal system, including desulfuration absorbing tower 1, Demister 2, absorption tower exhaust pass 3, wet electrical dust precipitator 5 and house outlet flue 6, described demister 2 is arranged on desulfurization and inhales Receiving tower 1 top, described absorption tower exhaust pass 3 is positioned at above desulfuration absorbing tower 1 and the outlet of its entrance connection demister 2, absorption tower Exhaust pass 3 connects described wet electrical dust precipitator 5, and the outlet of wet electrical dust precipitator 5 connects the entrance of house outlet flue 6, dedusting The outlet of device exhaust pass 6 connects chimney.In above-mentioned parts, desulfuration absorbing tower 1 is for carrying out desulfurization to pending flue gas;Demister 2 for being removed the droplet in the flue gas after desulfurization and part flue dust;Wet electrical dust precipitator 5 is for the residue flue dust in flue gas It is removed.

Cause to overcome existing wet electrical dust precipitator that the particulate matter lotus that some aerosol particle or particle diameter are too small is not powered on The situation of dedusting cannot be realized on anode region, phase transformation cohesion is installed between absorption tower exhaust pass 3 and wet electrical dust precipitator 5 all Flow chamber 4;The U-tube bundle that equal flow chamber 4 is made up of is condensed in phase transformation many PFA capillary array, forms many PFA of this U-tube bundle The entrance of pipe is connected to a cooling water inlet 9, and the outlet of many PFA capillary tubies is connected to a coolant outlet 10.Phase The said structure becoming the equal flow chamber 4 of cohesion is capable of the flue gas condensing phase transformation of wet electrical dust precipitator porch, promotes that minuteness particle coagulates Fusion is big, and makes smoke distribution uniform;Can effectively solve the problem that in conventional wet electric cleaner that particle size is too small and be difficult to charged asking Topic, improves the efficiency of dust collection of wet electrical dust precipitator.

Preferably, composition U-tube bundle the many equal sweat solderings of PFA capillary tube on same PFA tube sheet thus become one whole Body.

Preferably, U-tube bundle or is rearranged according to stagger arrangement by many PFA capillary tubies 11, and the pipe of adjacent PFA capillary tube 11 Centre distance is 20~30mm.The specification of PFA capillary tube 11 isOrOr other close specifications, such structure Make phase transformation condense equal flow chamber 4 and just there is good flue gas flow equalizing dispersion effect, and resistance ≯ 100Pa.It is of course also possible to select it He withOrThe PFA capillary tube of close specification rearranges U-tube bundle according to stagger arrangement or in-line.

The structure design of above-mentioned U-tube bundle makes flue gas flow equalizing disperse, and meanwhile, coordinates being passed through of outside cooling medium, it is possible to accurately Controlling the phase variation of saturated flue gas, make flue gas cool-down 2~4 DEG C, sub-micron grade particle therein effectively condenses, grows up, and enters further After entering wet scrubber, charge capacity improves, and then is greatly improved the efficiency of dust collection of wet scrubber 5, it is ensured that whole system exports Dust concentration ≯ 5mg/Nm3

Preferably, the anode tube bank in wet electrical dust precipitator 5 is equilateral triangle arrangement, and the length of side of this equilateral triangle is 0.3~0.5m, It is highly 2.0~6.5m.Traditional anode tube bank is hexagonal array, and the effective flow area of flue gas is less, and the present invention is in same circulation Under cross section, flue gas flow area increases, and flow velocity reduces, and extends the time of staying, beneficially dedusting, and dust collecting electrode surface moisture film is uniform simultaneously Stable, do not produce cutout and dry district;

The material selection epoxy resin composite material of the anode tube bank in wet electrical dust precipitator 5.

Gas approach and bottom dust-exhausting port is had on the inlet plenum of wet electrical dust precipitator 5;The water conservancy diversion gripper shoe of wet electrical dust precipitator 5 is used In reducing smoke flow resistance;The flusher nozzle of wet electrical dust precipitator 5 and the distance of upper cathodic suspension bracket are 0.3~0.5m, spray Distance between mouth is more than 2 times of anode tube bank single tube.The upper lower chamber of wet electrical dust precipitator 5 is equipped with cathode frame, and with absolutely Edge case is fixed;Corona wire is individually fixed on the cathode frame of upper and lower air chamber.Said structure good stability, corona wire is not susceptible to Swing, in electric field gas speed 1.5~4m/s, it is possible to realize the granule in ascending air after equal flow chamber 4 is condensed in phase transformation the most charged.

The operation principle of assembly of the invention is as follows: pending flue gas sequentially pass through from bottom to top desulfuration absorbing tower 1, demister 2, After equal flow chamber 4, wet electrical dust precipitator 5 and house outlet flue 6 are condensed in absorption tower exhaust pass 3, phase transformation, chimney discharge.Tool Body is, pending flue gas is after desulfuration absorbing tower 1 desulfurization, and demister 2 is to the part flue dust in desulfuration absorbing tower 1 exiting flue gas and mist Dripping removing, flue gas initially enters phase transformation and condenses equal flow chamber 4, i.e. passes through from bottom to top from U-tube bundle, and condensation phase transformation, cigarette occur Fine particle in gas quickly condenses change greatly, and meanwhile, flue gas is evenly dispersed;Flue gas continues through wet electrical dust precipitator 5, band The anode tube bank surface that electricity particulate matter is attached in wet electrical dust precipitator 5;Flue gas after the purification that wet electrical dust precipitator 5 is discharged is from removing Dirt device exhaust pass 6 enters chimney.

In above process, the moisture that saturated wet flue gas condenses out after condensing equal flow chamber 4 by phase transformation falls into water treating pond 7;Wet Flushing water after formula electric cleaner 5 periodic flushing also falls into water treating pond 7.The water collected in water treating pond 7 is delivered to desulfurization by flushing pump 8 Top, absorption tower 1 uses as the flushing water of demister 2, reach recycle-water again with, economize on resources.

Embodiment 2

As in figure 2 it is shown, this embodiment gives a kind of based on the wet-esp method containing the phase transformation equal Flow Technique of cohesion, the method bag Include following steps:

Step 1, carries out desulfurization by pending flue gas through desulfuration absorbing tower;

Step 2, droplet and part flue dust in the flue gas obtaining step 1 are removed by demister 2;

Step 3, uses wet electrical dust precipitator 5 to remove the flue dust in flue gas;

Before described step 3, also include that flue gas step 2 obtained is passed through the phase transformation equal flow chamber 4 of cohesion and carries out condensation the most uniformly Scattered step.

In addition, the step of the Water Sproading obtained after condensed by flue gas is also included.

Claims (4)

1. based on containing phase transformation condense equal Flow Technique a Wet-type electric dust removal system, including desulfuration absorbing tower (1), demister (2), Absorption tower exhaust pass (3), wet electrical dust precipitator (5) and house outlet flue (6), described demister (2) is arranged on de- Sulfur absorption tower (1) top, described absorption tower exhaust pass (3) is positioned at desulfuration absorbing tower (1) top and its entrance connects except mist The outlet of device (2), absorption tower exhaust pass (3) connects described wet electrical dust precipitator (5), going out of wet electrical dust precipitator (5) Mouth connects the entrance of house outlet flue (6), and the outlet of house outlet flue (6) connects chimney, it is characterised in that Phase transformation is installed between absorption tower exhaust pass (3) and wet electrical dust precipitator (5) and condenses equal flow chamber (4);Pending flue gas under Sequentially pass through desulfuration absorbing tower (1) on and, equal flow chamber (4), wet is condensed in demister (2), absorption tower exhaust pass (3), phase transformation After formula electric cleaner (5) and house outlet flue (6), chimney discharge;
It is the U-tube bundle rearranged by many PFA capillary tubies (11) that equal flow chamber (4) is condensed in described phase transformation, forms this U-tube The entrance of many PFA capillary tubies (11) of bundle is connected to a cooling water inlet (9), going out of many PFA capillary tube (11) Mouth is connected to a coolant outlet (10);
Described phase transformation is condensed the underface of equal flow chamber (4) and is provided with water treating pond (7), and the upper end of described water treating pond (7) is opened Mouth connects with absorption tower exhaust pass (3), and water treating pond (7) is connected, at water with the flusher that demister (2) carries Process and be provided with flushing pump (8) between pond (7) and this flusher;
The all sweat solderings of many PFA capillary tubies (11) of described composition U-tube bundle are on same PFA tube sheet (12);
Described U-tube bundle is rearranged according to stagger arrangement or in-line mode by many PFA capillary tubies (11), adjacent PFA capillary The tube center distance of pipe (11) is from for 20~30mm.
2. as claimed in claim 1 based on the Wet-type electric dust removal system condensing equal Flow Technique containing phase transformation, it is characterised in that described The specification of PFA capillary tube (11) isOr
3. as claimed in claim 1 based on the Wet-type electric dust removal system condensing equal Flow Technique containing phase transformation, it is characterised in that described Anode tube bank in wet electrical dust precipitator (5) is equilateral triangle arrangement, and the length of side of this equilateral triangle is 0.3~0.5m, and height is 2.0~6.5m.
4. as described in as arbitrary in claim 1 or 2 based on condensing the Wet-type electric dust removal system of equal Flow Technique containing phase transformation, its feature exists In, the material selection epoxy resin composite material of the anode tube bank in described wet electrical dust precipitator (5).
CN201410522652.1A 2014-09-30 2014-09-30 A kind of based on Wet-type electric dust removal system and the technique of condensing equal Flow Technique containing phase transformation CN104258683B (en)

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CN105689142B (en) * 2016-02-05 2017-11-10 中国石油大学(北京) A kind of wet electrical dust precipitator and its anode and system
CN105817112B (en) * 2016-04-20 2018-02-06 东南大学 It is a kind of based on steam phase transformation coupling voltolisation and dedusting pretreatment unit and method
CN105854483A (en) * 2016-05-05 2016-08-17 山东大学 Dedusting flue for reinforcing fine particle surface steam adsorption and growing up processes, system and method
CN105817325A (en) * 2016-05-06 2016-08-03 江苏釜鼎能源科技有限公司 Wet type electric dust collector with pre-coagulation function
CN105903337B (en) * 2016-06-21 2018-04-13 南通亚泰工程技术有限公司 A kind of flue gas desulfurization carries effect, dedusting, dewatering integrated device
CN105944495A (en) * 2016-07-15 2016-09-21 国电环境保护研究院 Coal-fired flue gas deep purification smoke plume removing system
CN106110853A (en) * 2016-08-29 2016-11-16 西安热工研究院有限公司 The system and method for wet desulphurization device phase transformation reunion cooperation-removal fine particle
CN106621680A (en) * 2016-11-22 2017-05-10 凯天环保科技股份有限公司 Method and system for deeply removing dust from flue gas after wet desulfurization
CN108970382A (en) * 2018-08-31 2018-12-11 大唐环境产业集团股份有限公司 A kind of disturbing flow device for flue gas condensing

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JP2003117349A (en) * 2001-10-17 2003-04-22 Mitsubishi Heavy Ind Ltd Flue gas treating apparatus
CN102767837B (en) * 2012-07-24 2015-01-07 西安交通大学 System for recovering water contained in flue gas and synchronously removing PM2.5 (Particulate Matter)
CN203610038U (en) * 2013-12-03 2014-05-28 上海中芬新能源投资有限公司 Efficient combined purifying tower for performing desulfurization and wet-type electrostatic dust collection on coal-fired flue gas
CN103861438B (en) * 2014-02-22 2016-03-09 浙江大学 The system and method for deep removal coal-fired flue-gas oxysulfide
CN204134436U (en) * 2014-09-30 2015-02-04 南京国电环保科技有限公司 A kind of based on the Wet-type electric dust removal system containing phase transformation cohesion flow equalize technology

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