CN104785094A - Desulphurization and dust-removal integrated device for gas fume of boiler - Google Patents
Desulphurization and dust-removal integrated device for gas fume of boiler Download PDFInfo
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- CN104785094A CN104785094A CN201510143153.6A CN201510143153A CN104785094A CN 104785094 A CN104785094 A CN 104785094A CN 201510143153 A CN201510143153 A CN 201510143153A CN 104785094 A CN104785094 A CN 104785094A
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- absorption tower
- desulfurization
- dust
- pump
- desulfurization absorbent
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Abstract
The invention discloses a desulphurization and dust-removal integrated device for gas fume of a boiler. The desulphurization and dust-removal integrated device comprises a jet device, a dust remover, an absorption tower, a slurry circulating pump, an oxidation air blower, a by-product discharging pump, a cooling water inlet, a cooling water return pipe and a slurry feeding pipe, wherein the jet device, the dust remover and the absorption tower are successively arranged in a zone at the tail of the boiler; the output end of the slurry circulating pump is connected with a slurry spraying layer, and the feeding end of the slurry circulating pump is connected to the inside of the absorption tower under the slurry spraying layer; the output end of the oxidation air blower is connected to the lower part of the absorption tower; the feeding end of the by-product discharging pump is connected with a by-product discharging opening in the bottom of the absorption tower, and the output end of the by-product discharging pump is connected with the jet device; one end of a condensation pipe bundle is the cooling water inlet, the other end of the condensation pipe bundle is connected with the water inlet end of the cooling water return pipe, and the cooling water return pipe is connected to the low bottom of the absorption tower; a desulphurization absorber input pipe is connected to the lower bottom of the absorption tower. The desulphurization and dust-removal integrated device realizes the treatment of desulphurization by-products, and desulfurization waste water and waste residue are not generated.
Description
Technical field
The present invention relates to a kind of boiler smoke integrated desulfurization dust-removing equipment, particularly relate to a kind of for Industrial Boiler flue gas SO
2, particle deep removal desulfation dust-extraction device, belong to desulfurization and dedusting technology field.
Background technology
At present, the discharge of Industrial Boiler flue gas pollutant has exceeded station boiler, has become the first pollution sources of national industrial trade, and the deep treatment for Industrial Boiler smoke pollution becomes inevitable.
Existing Industrial Boiler fume treatment mainly adopts dust-remover technology, its efficiency of dust collection is 90-97%, and desulfuration efficiency is 65-80%, and the desulfurizing byproduct that desulfurization produces directly is abandoned, and produce with desulfurization wastewater, need to carry out independent process to desulfurization wastewater.
The special emission limit of atmosphere pollution of " emission standard of air pollutants for boilers (GB13271-2014) " that on July 1st, 2014 implements requires: soot dust granule thing≤30mg/Nm
3, SO2≤200mg/ Nm
3, nitrogen oxide≤200mg/ Nm
3, this special limit value makes the efficiency of dust collection of fume treatment need reach more than 99%, desulfuration efficiency need reach more than 90%, and the dust-remover technology of existing routine is difficult to meet the demands.
Although existing flue gas in power station boiler treatment technology is ripe, no matter is desulfurization, dedusting all have higher efficiency, the flue-gas temperature of Industrial Boiler up to 160 ~ 300 DEG C, far above flue gas in power station boiler temperature.Therefore, the dedusting of employing flue gas in power station boiler, desulfur technology can not meet the use of Industrial Boiler, and the flue-gas temperature that namely Industrial Boiler is higher limits the direct application on Industrial Boiler of station boiler dedusting, desulfur technology.
Summary of the invention
The object of the invention is to: carry out SO mainly for Industrial Boiler flue gas
2, particle deep removal, provide a kind of without waste water and dregs discharge, smoke pollution of boiler thing SO that cost is low
2, particle simultaneously deep removal device, solve existing flue gas in power station boiler dedusting, desulfur technology on Industrial Boiler directly application owing to being subject to the restriction of Industrial Boiler high temperature and the technical problem that causes desulfurization, dust removing effects not good, thus can effectively solve above-mentioned problems of the prior art.
The object of the invention is realized by following technical proposals: a kind of boiler smoke integrated desulfurization dust-removing equipment, comprise the injection apparatus being arranged in boiler tail region successively, deduster and absorption tower, the top on absorption tower is provided with exhanst gas outlet, the bottom on absorption tower is provided with accessory substance outlet, the inside on absorption tower is provided with slurries spraying layer from the bottom up successively, demister and cohesion tube bank, described slurries spraying layer is arranged at middle and upper part, absorption tower, also comprise slurry circulating pump, oxidation fan, accessory substance excavationg pump, cooling water inlet, CWR and desulfurization absorbent input pipe, described serum recycle delivery side of pump is connected with slurries spraying layer, in absorption tower below the input access slurries spraying layer of slurry circulating pump, the output access bottom, absorption tower of oxidation fan, the input of accessory substance excavationg pump is connected with the accessory substance outlet bottom absorption tower, and accessory substance is discharged delivery side of pump and is connected with injection apparatus, one end of cohesion tube bank is cooling water inlet, and the other end is connected with the water intake end of CWR, the lower bottom part on CWR access absorption tower, desulfurization absorbent input pipe access absorption tower lower bottom part.
As a kind of preferred embodiment, also comprise desulfurization absorbent and prepare case and desulfurization absorbent transfer pump, desulfurization absorbent is prepared case and is arranged at outside absorption tower and connects with CWR, desulfurization absorbent transfer pump and desulfurization absorbent are prepared case and are connected, and desulfurization absorbent input pipe connects with desulfurization absorbent transfer pump.
As further preferred embodiment, desulfurization absorbent entrance is established in the top that desulfurization absorbent prepares case.
As another kind of preferred embodiment, the external absorbent pipeline of desulfurization absorbent input pipe.
Compared with prior art, beneficial effect of the present invention: this boiler smoke integrated desulfurization dust-removing equipment is mainly for Industrial Boiler flue gas SO
2, particle deep removal, utilize high-temperature flue gas to heat and the collecting action of deduster, realize the process of desulfurizing byproduct, without desulfurization wastewater, waste sludge discharge; Cost of investment and operating cost low, be particularly suitable for the desulfurization of Industrial Boiler, dedusting; Possess following advantage specifically:
1, utilize preposition deduster to carry out rough dusting, deep desulfuration, dedusting are carried out in recycling absorption tower, and desulfuration efficiency reaches more than 90%, efficiency of dust collection reaches more than 99% or SO
2≤ 200mg/ Nm
3, soot dust granule thing≤30mg/ Nm
3object;
2, sprayed into by injection apparatus by desulfurizing byproduct, desulfurizing byproduct enters circulation again, and recycling deduster realizes the process of desulfurizing byproduct, and whole process produces without independent desulfurization wastewater, waste residue;
3, desulfurizing byproduct is sprayed into the high-temperature flue gas of 160 ~ 300 DEG C by injection apparatus, make flue-gas temperature reduce by 50 ~ 200 DEG C, expand the range of choice of downstream dedusting technology, significantly improve the efficiency of dust collection of deduster;
4, dedusting is condensed tube bank cohesion dedusting 3-stage dust-removal formed by the pre-dedusting of deduster, absorption tower spray washing dedusting, absorption tower, realizes the deep removal of soot dust granule thing.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1.
Fig. 2 is the structural representation of the embodiment of the present invention 2.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
All features disclosed in this description, or the step in disclosed all methods or process, except the speciality mutually repelled and/or step, all can combine by any way, unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object, namely, unless specifically stated otherwise, an embodiment in a series of equivalence of each feature or similar characteristics.
embodiment 1
Certain Industrial Boiler exhaust gas volumn about 50000 Nm
3/ h, SO in flue gas
2concentration is 2000mg/Nm
3, dust concentration is 2.2g/ Nm
3, flue-gas temperature, within the scope of 220 ~ 280 DEG C, adopts the desulfation dust-extraction device of the present embodiment 1 to carry out SO in flue gas pollutant
2with the control of flue dust, reach SO in smoke evacuation
2concentration≤200 mg/ Nm
3, dust concentration≤30 mg/ Nm
3target.Its detailed process is as follows:
As shown in Figure 1, a kind of boiler smoke integrated desulfurization dust-removing equipment, it comprise be arranged in boiler tail region successively injection apparatus 1, deduster 2 and absorption tower 3, the top on absorption tower 3 is provided with exhanst gas outlet 32, the bottom on absorption tower 3 is provided with accessory substance outlet, the inside on absorption tower 3 is provided with slurries spraying layer 34, demister 35 and cohesion tube bank 36 from the bottom up successively, and described slurries spraying layer 34 is arranged at the middle and upper part on absorption tower 3.In order to meet the requirement of above-mentioned desulfurization and dedusting, being also designed with slurry circulating pump 37, oxidation fan 38, accessory substance excavationg pump 39, cooling water inlet 310, CWR 311, desulfurization absorbent input pipe 312, desulfurization absorbent transfer pump 313 and desulfurization absorbent and preparing case 4.
The output of described slurry circulating pump 37 is connected with slurries spraying layer 34, in the absorption tower 3 below the input access slurries spraying layer 34 of slurry circulating pump 37.The slurries of bottom, absorption tower 3 suck by slurry circulating pump, then enter in slurries spraying layer and carry out recycling again.
The output of oxidation fan 38 is communicated with the bottom on absorption tower 3; The input of accessory substance excavationg pump 39 is connected with the accessory substance outlet bottom absorption tower 3, and the output of accessory substance excavationg pump 39 is connected with injection apparatus 1.Oxidation fan, for providing oxidation wind bottom absorption tower, makes desulfurizing byproduct form stable accessory substance fast, and the accessory substance produced after desulfurization is by the sucking-off of accessory substance excavationg pump, and then this accessory substance is sent in injection apparatus and entered circulation by accessory substance excavationg pump.
One end of cohesion tube bank 36 is cooling water inlet 310, and the other end is connected with the water intake end of CWR 311, and CWR 311 accesses the lower bottom part on absorption tower 3; Desulfurization absorbent is prepared case 4 and is arranged at that absorption tower 3 is outer to connect with CWR 311, and desulfurization absorbent transfer pump 313 and desulfurization absorbent slurries are prepared case 4 and connected, and desulfurization absorbent entrance is established in the top that desulfurization absorbent prepares case 4.Desulfurization absorbent input pipe 312 connects with desulfurization absorbent transfer pump 313, and desulfurization absorbent input pipe 312 accesses the lower bottom part on absorption tower 3.Send into cooling water from the one end of condensing tube bank, this cooling water feeding desulfurization absorbent after cohesion tube bank, then is prepared in case by cooling water, and desulfurization absorbent is prepared in case the slurries preparing gained and is input in absorption tower through desulfurization absorbent transfer pump.
Mechanism and the principle of whole integrated desulfurization dust-removing equipment are as follows:
First the boiler smoke of 220 ~ 280 DEG C flows through the injection apparatus be arranged in flue, and after evaporation desulfurizing byproduct slurries, flue-gas temperature reduces about 50 ~ 200 DEG C, and dust concentration is increased to about 4 ~ 6g/ Nm
3.Flue gas carries flue dust and enters deduster subsequently, and after deduster rough dusting, house outlet dust concentration reduces to 120 ~ 180mg/ Nm
3; Accessory substance is discharged in the below of deduster.Flue gas enters absorption tower after dedusting, then upwards flows, the lime stone slurry counter current contacting sprayed downwards with spraying layer, the SO in flue gas
2removed by washing with part soot dust granule thing, the particle in flue gas reduces to 60-90 mg/ Nm
3.Flue gas toward rising, removes drop through demister again, then flows through cohesion tube bank, and flue gas is cooled, and the particle in flue gas is condensed, assembles swell, condenses upon in tube bank.Finally, rinsed by flushing water and particle is entered in the stock tank of bottom, absorption tower, reach particle object in deep removal flue gas.The exhanst gas outlet of flue gas after purification through top, absorption tower flows out.
In the present embodiment, desulfurizing agent is lime stone, lime stone desulfurizer slurry prepare in case with carry out the cooling water that self-coagulation restrain and make lime stone slurry, and through the lower bottom part of desulfurization absorbent transfer pump by desulfurization absorbent input pipe feeding absorption tower.The cooling medium of cohesion tube bank is water, enters cohesion tube bank from cooling water inlet; Entering desulfurization absorbent from the cooling water of cohesion tube bank outflow by CWR prepares case, as slurrying water.
After absorption tower deep desulfuration, dedusting, SO in flue gas
2concentration≤200mg/ Nm
3, dust concentration≤20 ~ 30mg/ Nm
3, desulfuration efficiency 90%, combined dust-eliminating efficiency 99.5%.
embodiment 2
As shown in Figure 2, a kind of boiler smoke integrated desulfurization dust-removing equipment, it comprise be arranged in boiler tail region successively injection apparatus 1, deduster 2 and absorption tower 3, the top on absorption tower 3 is provided with exhanst gas outlet 32, the bottom on absorption tower 3 is provided with accessory substance outlet, the inside on absorption tower 3 is provided with slurries spraying layer 34, demister 35 and cohesion tube bank 36 from the bottom up successively, and described slurries spraying layer 34 is arranged at the middle and upper part on absorption tower 3.In order to meet the requirement of above-mentioned desulfurization and dedusting, be also designed with slurry circulating pump 37, oxidation fan 38, accessory substance excavationg pump 39, cooling water inlet 310, CWR 311 and desulfurization absorbent input pipe 312.Compared with embodiment 1, the structure distinctive points of the present embodiment is, does not have desulfurization absorbent to prepare case and desulfurization absorbent transfer pump.The external absorbent pipeline of desulfurization absorbent input pipe 312.CWR 311, after cohesion tube bank access, directly connects with the lower bottom part on absorption tower.
Certain Industrial Boiler exhaust gas volumn about 100000 Nm
3/ h, SO in flue gas
2concentration is 1530mg/ Nm
3, dust concentration is 3.2g/ Nm
3, flue-gas temperature, within the scope of 200 ~ 260 DEG C, adopts boiler smoke SO of the present invention
2, particle deep removal technique carries out SO in flue gas pollutant
2with the control of flue dust, reach SO in smoke evacuation
2concentration≤200 mg Nm
3, dust concentration≤30 mg/ Nm
3target.
First the boiler smoke of 200 ~ 260 DEG C flows through the injection apparatus be arranged in boiler back end ductwork, and after evaporation desulfurizing byproduct slurries, flue-gas temperature reduces about 50 ~ 200 DEG C, and dust concentration is increased to about 6.45g/ Nm
3; Flue gas carries flue dust and enters deduster subsequently, and after deduster rough dusting, house outlet dust concentration reduces to 200mg/ Nm
3; After flowing out from deduster, flue gas enters backward upper flowing by the smoke inlet on absorption tower, the calcium hydroxide slurries counter current contacting sprayed with spraying layer, the SO in flue gas downwards
2removed by washing with part soot dust granule thing, drop is removed through demister, flow through cohesion tube bank again, flue gas is cooled, particle in flue gas is condensed, assembles swell, condense upon in tube bank, then by flushing water flushing, particle is entered in the stock tank of bottom, absorption tower, reach particle object in deep removal flue gas.The exhanst gas outlet of flue gas after purification through absorbing tower top flows out.In the present embodiment, cohesion tube bank cooling medium is water, enters cohesion tube bank from cooling water inlet; The cooling water flowed out from cohesion tube bank is directly entered the slurry pool on absorption tower by cooling water water return outlet.Lime or calcium hydroxide slurries enter in tower from desulfurization absorbent input pipe.
After absorption tower deep desulfuration, dedusting, SO in flue gas
2concentration≤150mg Nm
3, dust concentration≤28mg/ Nm
3, desulfuration efficiency 90.2%, combined dust-eliminating efficiency 99.13%.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. a boiler smoke integrated desulfurization dust-removing equipment, comprise be arranged in boiler tail region successively injection apparatus (1), deduster (2) and absorption tower (3), the top on absorption tower (3) is provided with exhanst gas outlet (32), the bottom on absorption tower (3) is provided with accessory substance outlet, the inside on absorption tower (3) is provided with slurries spraying layer (34), demister (35) and cohesion tube bank (36) from the bottom up successively, and described slurries spraying layer (34) is arranged at absorption tower (3) middle and upper part; It is characterized in that: also comprise slurry circulating pump (37), oxidation fan (38), accessory substance excavationg pump (39), cooling water inlet (310), CWR (311) and desulfurization absorbent input pipe (312), the output of described slurry circulating pump (37) is connected with slurries spraying layer (34), in the absorption tower (3) of input access slurries spraying layer (34) below of slurry circulating pump (37); The bottom of output access absorption tower (3) of oxidation fan (38); The input of accessory substance excavationg pump (39) is connected with the accessory substance outlet of absorption tower (3) bottom, and the output of accessory substance excavationg pump (39) is connected with injection apparatus (1); One end of cohesion tube bank (36) is cooling water inlet (310), and the other end is connected with the water intake end of CWR (311), the lower bottom part of CWR (311) access absorption tower (3); The lower bottom part of desulfurization absorbent input pipe (312) access absorption tower (3).
2. boiler smoke integrated desulfurization dust-removing equipment as claimed in claim 1, it is characterized in that: also comprise desulfurization absorbent and prepare case (4) and desulfurization absorbent transfer pump (313), desulfurization absorbent prepare case (4) be arranged at absorption tower (3) outside connect with CWR (311), desulfurization absorbent transfer pump (313) and desulfurization absorbent are prepared case (4) and are connected, and desulfurization absorbent input pipe (312) connects with desulfurization absorbent transfer pump (313).
3. boiler smoke integrated desulfurization dust-removing equipment as claimed in claim 1, is characterized in that: the external absorbent pipeline of desulfurization absorbent input pipe (312).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510143153.6A CN104785094A (en) | 2015-03-30 | 2015-03-30 | Desulphurization and dust-removal integrated device for gas fume of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510143153.6A CN104785094A (en) | 2015-03-30 | 2015-03-30 | Desulphurization and dust-removal integrated device for gas fume of boiler |
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|---|---|
| CN104785094A true CN104785094A (en) | 2015-07-22 |
Family
ID=53550554
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|---|---|---|---|
| CN201510143153.6A Pending CN104785094A (en) | 2015-03-30 | 2015-03-30 | Desulphurization and dust-removal integrated device for gas fume of boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105477896A (en) * | 2015-12-23 | 2016-04-13 | 烟台龙源电力技术股份有限公司 | Wet process desulphurization demisting device and wet process desulphurization device |
| CN105688581A (en) * | 2016-04-01 | 2016-06-22 | 中国大唐集团科学技术研究院有限公司 | Liquid film dedusting device and desulfurizer dedusting rectification system with same |
| CN106076082A (en) * | 2016-08-12 | 2016-11-09 | 攀枝花市九鼎智远知识产权运营有限公司 | A kind of steel mill energy-saving vulcanizing tower |
-
2015
- 2015-03-30 CN CN201510143153.6A patent/CN104785094A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105477896A (en) * | 2015-12-23 | 2016-04-13 | 烟台龙源电力技术股份有限公司 | Wet process desulphurization demisting device and wet process desulphurization device |
| CN105688581A (en) * | 2016-04-01 | 2016-06-22 | 中国大唐集团科学技术研究院有限公司 | Liquid film dedusting device and desulfurizer dedusting rectification system with same |
| CN106076082A (en) * | 2016-08-12 | 2016-11-09 | 攀枝花市九鼎智远知识产权运营有限公司 | A kind of steel mill energy-saving vulcanizing tower |
| CN106076082B (en) * | 2016-08-12 | 2018-11-27 | 浙江国正安全技术有限公司 | A kind of steel mill energy-saving vulcanizing tower |
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Application publication date: 20150722 |
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