CN103111165B - Coal-fired flue-gas dust-removing and desulfurization one purifies technique and can implement the filter of this technique - Google Patents

Coal-fired flue-gas dust-removing and desulfurization one purifies technique and can implement the filter of this technique Download PDF

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CN103111165B
CN103111165B CN201210589570.XA CN201210589570A CN103111165B CN 103111165 B CN103111165 B CN 103111165B CN 201210589570 A CN201210589570 A CN 201210589570A CN 103111165 B CN103111165 B CN 103111165B
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filter element
tabular
gas
technique
dust
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CN103111165A (en
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高麟
汪涛
林勇
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Intermet Technology Chengdu Co Ltd
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Intermet Technology Chengdu Co Ltd
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Abstract

The invention discloses a kind of coal-fired flue-gas dust-removing and desulfurization one that can simultaneously realize dedusting and desulfurization and purify technique.The coal-fired flue-gas dust-removing and desulfurization one of the present invention purifies technique, containing solid dust, sulfur dioxide, nitrogen oxides, water vapour and other materials existed in described flue gas, the step that this technique includes is: injects ammonia in described flue gas, and makes this flue gas move from the windward side of filter element to lee face in the filter;Before described windward side, electrion field is produced by electrion generating means;Inspired the sulfur dioxide in flue gas, nitrogen oxides by electrion field and react generation ammonium sulfate and ammoniumnitrate prill respectively with ammonia;Described ammonium sulfate and ammoniumnitrate prill are retained in together with the solid dust that in flue gas, itself is contained the side, windward side of this filter element by filter element, and other materials that can not be trapped then pass through from filter element and enter the lee face side of filter element.

Description

Coal-fired flue-gas dust-removing and desulfurization one purifies technique and can implement the filter of this technique
Technical field
The present invention relates to purifying coal-fired flue gas technology, be specifically related to coal-fired flue-gas dust-removing and desulfurization one and purify Technique and the filter of this technique can be implemented.
Background technology
Existing plasma for desulfurizing flue gas technology mainly includes that electronic beam method flue gas desulfurization technique (is called for short And impulse electric corona method flue gas desulfurization technique (be called for short PPCP) EBA).Electronic beam method flue gas desulfurization skill Art is the electron beam irradiation flue gas produced by electron accelerator in the reactor, utilizes generation Sulfur dioxide in free radical activity radical oxidation flue gas and nitrogen oxides, then with the ammonia added Reaction, generates ammonium sulfate and ammoniumnitrate prill, finally realizes pollutant removing.Pulse electricity The desulphurization denitration mechanism of dizzy method flue gas desulfurization technique is essentially identical with electronic beam method flue gas desulfurization technique , difference instead of the electron accelerator in electronic beam method with high-voltage pulse power source, instead with it Answer generation high voltage narrow pulse corona field in device, thus inspire the sulfur dioxide in flue gas, nitrogen oxidation Thing reacts generation ammonium sulfate and ammoniumnitrate prill respectively with ammonia.Although these plasmas above-mentioned Body flue gas desulfurization technique has can the incomparable advantage of the tradition desulfurization technology such as simultaneous SO_2 and NO removal But, ammonium sulfate, ammoniumnitrate prill and the cigarette that their reactor all can not will produce In gas, contained solid dust itself is separated from flue gas, the most also must Cleaner must be equipped, increase technology implementation cost.
Summary of the invention
It is desirable to provide a kind of coal-fired flue-gas dust-removing and desulfurization one that can simultaneously realize dedusting and desulfurization Body purifies technique.
The coal-fired flue-gas dust-removing and desulfurization one of the present invention purifies technique, containing solid dust in described flue gas , sulfur dioxide, nitrogen oxides, water vapour and other exist material, the step that this technique includes Suddenly it is: in described flue gas, inject ammonia, and make this flue gas meeting from filter element in the filter Wind moves towards lee face;Before described windward side, high pressure is produced by electrion generating means Electric discharge field;Inspired by electrion field the sulfur dioxide in flue gas, nitrogen oxides respectively with ammonia Reaction generates ammonium sulfate and ammoniumnitrate prill;By filter element by described ammonium sulfate It is retained in this filter element together with the solid dust that in flue gas, itself is contained with ammoniumnitrate prill Side, windward side, other materials that can not be trapped then pass through from filter element and entered The lee face side of filtering element.
The above-mentioned coal-fired flue-gas dust-removing and desulfurization one of the present invention purifies technique by plasma for desulfurizing flue gas skill Art and smoke filtration dedusting have carried out organic combination.In the implementation process of this technique, flue gas In contained solid dust itself gradually can form cake layer, filter on the windward side of filter element The duct on orifice throat ratio filter element in cake layer is less, so that reaction generates ammonium sulfate It is difficult to pass through with ammoniumnitrate prill.Therefore, the present invention can be by chemistry and physical method simultaneously Sulfur dioxide in flue gas, nitrogen oxides and solid dust are separated, reaches one clean Change effect.
The present invention is described further with detailed description of the invention below in conjunction with the accompanying drawings.The present invention adds Aspect and advantage will be Giving out in the middle part of explained below, part will become apparent from the description below, or by this The practice of invention is recognized.
Accompanying drawing explanation
Fig. 1 is that the dust-removal and desulfurizing one of the embodiment of the present invention 1 purifies schematic diagram.
Fig. 2 is that the dust-removal and desulfurizing one of the embodiment of the present invention 2 purifies schematic diagram.
Fig. 3 is that the dust-removal and desulfurizing one of the embodiment of the present invention 3 purifies schematic diagram.
Fig. 4 is the filtration device structure signal of the dust-removal and desulfurizing one purification technique implementing the embodiment of the present invention 3 Figure.
Detailed description of the invention
As it is shown in figure 1, the coal-fired flue-gas dust-removing and desulfurization one of the embodiment of the present invention 1 purifies technique by height Press discharging generator 1 to produce a height before being positioned at the windward side of filter element 3 in the filter to press Electric field, specifically, this electrion field is to be produced and through electron gun by from electron accelerator 101 102 are formed to extraradial electron beam 103.Containing solid dust 201, sulfur dioxide, nitrogen oxygen The coal-fired flue-gas 2 of compound, water vapour and other materials with direction shown in arrow in Fig. 1 by this height Pressing electric field, therebetween, it is extremely strong that electrion field inspires oxidisability from the water vapour of flue gas 2 Free radical activity group, thus sulfur dioxide and nitrogen oxides are oxidized to sulphuric acid and nitric acid respectively , sulphuric acid and nitric acid react generation ammonium sulfate 202 the most respectively with the ammonia being previously implanted in flue gas 2 With ammoniumnitrate prill 203, understand due to contained solid dust 201 own in flue gas 2 and gradually filtering Forming cake layer on the windward side of element 3, cake layer enhances filter element 3 to ammonium sulfate 202 and the rejection effect of ammoniumnitrate prill 203, so that ammonium sulfate 202 and ammoniumnitrate prill 203 are retained in meeting of this filter element 3 together with the solid dust 201 that in flue gas 2, itself is contained Side, wind face, other materials that can not be trapped then pass through from filter element 3 and enter filtration The lee face side of element 3.
As in figure 2 it is shown, the embodiment of the present invention 2 coal-fired flue-gas dust-removing and desulfurization one purify technique yet by Electrion generating means 1 produces a high pressure before being positioned at the windward side of filter element 3 in the filter Electric discharge field, specifically, this electrion field is by for conductor and double as electrion and fill Before the filter element 3 of putting electrode, the windward side being positioned at this filter element 3 and and filter element 3 be spaced The electrode wires 105 of certain distance and electrically connecting with described filter element 3 and electrode wires 105 respectively Produced by high voltage power supply 104, corona 106 is formed.Containing solid dust 201, sulfur dioxide, nitrogen The coal-fired flue-gas 2 of oxide, water vapour and other materials passes through with direction shown in arrow in Fig. 2 should Electrion field, therebetween, it is extremely strong that electrion field inspires oxidisability from the water vapour of flue gas 2 Free radical activity group, thus sulfur dioxide and nitrogen oxides are oxidized to sulphuric acid and nitre respectively Acid, sulphuric acid and nitric acid react generation ammonium sulfate 2 the most respectively with the ammonia being previously implanted in flue gas 2 02 and ammoniumnitrate prill 203, owing to the solid dust 201 that in flue gas 2, itself is contained can be gradually in mistake Forming cake layer on the windward side of filtering element 3, cake layer enhances filter element 3 to ammonium sulfate Grain 202 and the rejection effect of ammoniumnitrate prill 203, so that ammonium sulfate 202 and ammonium nitrate Grain 203 is retained in this filter element 3 together with the solid dust 201 that in flue gas 2, itself is contained Side, windward side, other materials that can not be trapped then pass through from filter element 3 and entered The lee face side of filtering element 3.
Obviously, the electrion generating means of the embodiment of the present invention 1 used for reference existing electronic beam method flue gas take off Sulfur technology is formed electricity The correlation technique of son bundle.The electrion generating means of the embodiment of the present invention 2 then existing pulse electricity Dizzy method flue gas desulfurization technique is formed the correlation technique of corona field.For the embodiment of the present invention 2, high Voltage source 104 is preferably with high-voltage pulse power source, so, will form arteries and veins before filter element 3 Impulse electricity field, reaches the desulfurization off sulfide effect similar with existing impulse electric corona method flue gas desulfurization technique .It addition, the embodiment of the present invention 2 is preferably with the filter element 3 of tabular.
As it is shown on figure 3, the embodiment of the present invention 3 coal-fired flue-gas dust-removing and desulfurization one purify technique yet by Electrion generating means 1 produces a high pressure before being positioned at the windward side of filter element 3 in the filter Electric discharge field, specifically, described electrion generating means includes the first tabular filter element 3a , the second tabular filter element 3b and respectively with the first tabular filter element 3a and the second tabular mistake Filtering element 3b electrical connection high voltage power supply 107, the windward side of described first tabular filter element 3a with The windward side of the second tabular filter element 3b is oppositely arranged and forms electrion field betwixt.Contain There is the coal-fired flue-gas of solid dust 201, sulfur dioxide, nitrogen oxides, water vapour and other materials 2 with direction shown in arrow in Fig. 3 by this electrion field, therebetween, electrion field is from flue gas The water vapour of 2 inspires the free radical activity group that oxidisability is extremely strong, thus by sulfur dioxide and Nitrogen oxides be oxidized to respectively sulphuric acid and nitric acid, sulphuric acid and nitric acid the most respectively be previously implanted into flue gas Ammonia reaction in 2 generates ammonium sulfate 202 and ammoniumnitrate prill 203, due to own in flue gas 2 Contained solid dust 201 can be gradually at the first tabular filter element 3a and the second tabular filter element On the windward side of 3b formed cake layer, cake layer enhance the first tabular filter element 3a, second Tabular filter element 3b to ammonium sulfate 202 and the rejection effect of ammoniumnitrate prill 203, thus Make ammonium sulfate 202 and ammoniumnitrate prill 203 and itself contained solid dust 201 in flue gas 2 It is retained in together between this first tabular filter element 3a and the second tabular filter element 3b, and Other materials that can not be trapped filter from the first tabular filter element 3a and the second tabular the most respectively In element 3b filter element 3 by and enter the first tabular filter element 3a and the second tabular crosses filtering element The lee face side of part 3b.
In the embodiment of the present invention 3, high voltage power supply 104 is preferably with high-voltage pulse power source.The present invention implements The electrion field produced in example 3 had both been different from embodiment 1 electron beam 103 produced, also different In implementing the corona 106 that produces in 2, embodiment 3 use the first tabular filter element 3a, second High voltage is applied thus by interpolar gas medium disruptive discharge between tabular filter element 3b.This The something in common of bright embodiment 3 and embodiment 2 with, their filter element 3 for conductor and doubles as The electrode of electrion generating means.Due to electrion field can make in flue gas 2 to be clean miscellaneous Matter is charged, and filter element 3 itself is as the electrode of electrion generating means, therefore, and mistake Filtering element 3 can in flue gas 2 charged impurity produce absorption or repulsive interaction, make these impurity without Method is passed through from filter element 3, improves gas cleaning effect further.The embodiment of the present invention 3 with The filter element 3 of embodiment 2 can be made up of inorganic porous conductor material, such as rustless steel porous material Material, nickel porous material etc., it is preferred that many by titanium-aluminium alloy porous conductor material, ferroaluminium A kind of composition in hole conductor material, nickel alumin(i)um alloy porous conductor material, to enable the invention to Adapt to high temperature filtration condition.
Fig. 4 is the filter that a kind of dust-removal and desulfurizing one implementing the embodiment of the present invention 3 purifies technique Structural representation.This filter 4 includes air inlet 401, air vent 404 and slag-drip opening 405, mistake It is provided with in the shell of filter 4 and described air inlet Inlet plenum 402 that 401 communicate and the dust storage chamber 406 communicated with slag-drip opening 405, described inlet plenum For gas cleaning district between 402 and dust storage chamber 406, in gas cleaning district, windward side is installed relative The the first tabular filter element 3a arranged and the second tabular filter element 3b, described first tabular mistake Filtering element 3a, the second tabular filter element 3b electrically connect with high voltage power supply 107 respectively, thus Formed between windward side and the windward side of the second tabular filter element 3b of one tabular filter element 3a Electrion field;Being positioned at the periphery in described gas cleaning district in the shell of filter 4, to be provided with one only Vertical annular air-purifying chamber 403, this annular air-purifying chamber 403 and described air vent 404 and be positioned at first Clean gas after the lee face of tabular filter element 3a and the lee face of the second tabular filter element 3b Exhaust passage connects.It addition, for convenience of ammonia is injected in coal-fired flue-gas 2 to be clean, described in enter Spray ammonia pipe 5 it is provided with at QI KOU 401.Can install according to same way in described gas cleaning district Polylith the first tabular filter element 3a and the second tabular filter element 3b, to improve treatment quantity 。
The work process of above-mentioned filter is: flue gas 2 enters filter 4 from air inlet 401, therebetween, In flue gas 2, ammonia is injected by spray ammonia pipe 5;Hereafter, the flue gas 2 containing ammonia from inlet plenum 402 to Between windward side and the windward side of the second tabular filter element 3b of the first tabular filter element 3a Passage moves, then inspires the sulfur dioxide in flue gas 2, nitrogen oxygen by described electrion field Compound reacts generation ammonium sulfate and ammoniumnitrate prill respectively with ammonia;Filtered by the first tabular Element 3a and the second tabular filter element 3b is by described ammonium sulfate and ammoniumnitrate prill and cigarette In gas, contained solid dust itself retains in described passage together, and falls by gravity into dust Room 406, thus be deposited at the slag-drip opening 405 of dust storage chamber 406, and other things that can not be trapped Matter is then passed through and by being positioned at from the first tabular filter element 3a and the second tabular filter element 3b After the lee face of the first tabular filter element 3a and the lee face of the second tabular filter element 3b Clean gas exhaust passage enters annular air-purifying chamber 403, discharges from air vent 404 the most again.

Claims (5)

1. coal-fired flue-gas dust-removing and desulfurization one purify technique, in described flue gas containing solid dust, sulfur dioxide, nitrogen oxides, Water vapour, the step that this technique includes is: injects ammonia in described flue gas, and makes this flue gas in the filter from filter element (3) Windward side to lee face move;Before described windward side, electrion field is produced by electrion generating means (1);Pass through Electrion field inspires the sulfur dioxide in flue gas, nitrogen oxides and reacts generation ammonium sulfate and ammoniumnitrate prill respectively with ammonia; By filter element (3), described ammonium sulfate and ammoniumnitrate prill are retained in together with the solid dust that in flue gas, itself is contained The side, windward side of this filter element (3), other materials that can not be trapped then pass through from filter element (3) and enter The lee face side of filter element (3);In the implementation process of this technique, in flue gas, contained solid dust itself can gradually exist Forming cake layer on the windward side of filter element, the duct on orifice throat ratio filter element on cake layer is less, so that reaction is raw Ammonium sulfate and ammoniumnitrate prill is become to be difficult to pass through;Described filter element (3) is conductor and doubles as electrion generating means Electrode, this electrion generating means includes the first tabular filter element (3a), the second tabular filter element (3b) and difference The high voltage power supply electrically connected with the first tabular filter element (3a) and the second tabular filter element (3b), described first tabular mistake The windward side of filtering element (3a) is oppositely arranged with the windward side of the second tabular filter element (3b) and forms electrion betwixt ?;Described filter element (3) is made up of inorganic porous conductor material.
2. coal-fired flue-gas dust-removing and desulfurization one as claimed in claim 1 purifies technique, it is characterised in that: described filter element (3) It is made up of the one in titanium-aluminium alloy porous conductor material, ferroaluminium porous conductor material, nickel alumin(i)um alloy porous conductor material.
3. coal-fired flue-gas dust-removing and desulfurization one as claimed in claim 1 purifies technique, it is characterised in that: described high voltage power supply is High-voltage pulse power source.
4. coal-fired flue-gas dust-removing and desulfurization one as claimed in claim 1 or 2 purifies technique, it is characterised in that: described height presses Electric field is Pulsed Corona.
5. can implement coal-fired flue-gas dust-removing and desulfurization one described in claim 1 and purify the filter of technique, including air inlet, aerofluxus Mouth and slag-drip opening, be provided with the inlet plenum communicated with described air inlet and the dust storage chamber communicated with slag-drip opening in the shell of filter, For gas cleaning district between described inlet plenum and dust storage chamber, it is characterised in that: in gas cleaning district, windward side is installed and is oppositely arranged The first tabular filter element (3a) and the second tabular filter element (3b), described first tabular filter element (3a), second Tabular filter element (3b) electrically connects with high voltage power supply (107) respectively, thus at the first tabular filter element (3a) windward Electrion field is formed between the windward side of face and the second tabular filter element (3b);Described cigarette it is positioned in the shell of filter The periphery of gas purifying area is provided with an independent annular air-purifying chamber (403), this annular air-purifying chamber (403) and described air vent and position Clean gas aerofluxus after the lee face of the first tabular filter element (3a) and the lee face of the second tabular filter element (3b) is led to Road connects.
CN201210589570.XA 2012-12-29 Coal-fired flue-gas dust-removing and desulfurization one purifies technique and can implement the filter of this technique Active CN103111165B (en)

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CN201210589570.XA CN103111165B (en) 2012-12-29 Coal-fired flue-gas dust-removing and desulfurization one purifies technique and can implement the filter of this technique

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CN201210589570.XA CN103111165B (en) 2012-12-29 Coal-fired flue-gas dust-removing and desulfurization one purifies technique and can implement the filter of this technique

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CN103111165A CN103111165A (en) 2013-05-22
CN103111165B true CN103111165B (en) 2016-11-30

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1559651A (en) * 2004-02-14 2005-01-05 中国工程物理研究院环保工程研究中心 Exbaust gas purification method and device by pulse corona dicharging method
CN1562445A (en) * 2004-03-29 2005-01-12 广东杰特科技发展有限公司 Method of synchronous cleansing air pollutant by smoke of plasma discharge caused by spreading light

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1559651A (en) * 2004-02-14 2005-01-05 中国工程物理研究院环保工程研究中心 Exbaust gas purification method and device by pulse corona dicharging method
CN1562445A (en) * 2004-03-29 2005-01-12 广东杰特科技发展有限公司 Method of synchronous cleansing air pollutant by smoke of plasma discharge caused by spreading light

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Denomination of invention: Integrated purification process for dust removal and desulfurization of coal-fired flue gas and filter capable of implementing the process

Effective date of registration: 20220526

Granted publication date: 20161130

Pledgee: Wenjiang sub branch of Chengdu Rural Commercial Bank Co.,Ltd.

Pledgor: INTERMET TECHNOLOGIES CHENGDU Co.,Ltd.

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Pledgee: Wenjiang sub branch of Chengdu Rural Commercial Bank Co.,Ltd.

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Denomination of invention: Integrated purification process for dust removal and desulfurization of coal-fired flue gas and filter that can implement the process

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