CN202224058U - Desulfurization and dust removal device for sprayed supersaturation water quicklime powder - Google Patents

Desulfurization and dust removal device for sprayed supersaturation water quicklime powder Download PDF

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Publication number
CN202224058U
CN202224058U CN2011202739062U CN201120273906U CN202224058U CN 202224058 U CN202224058 U CN 202224058U CN 2011202739062 U CN2011202739062 U CN 2011202739062U CN 201120273906 U CN201120273906 U CN 201120273906U CN 202224058 U CN202224058 U CN 202224058U
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China
Prior art keywords
flue
water
sprays
links
nozzle
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Expired - Lifetime
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CN2011202739062U
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Chinese (zh)
Inventor
朱跃
程雪山
李锋
杜振
姬海宏
宋广田
魏宏鸽
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Huadian Electric Power Research Institute Co Ltd
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Huadian Electric Power Research Institute Co Ltd
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Abstract

The utility model relates to a desulfurization and dust removal device of sprayed supersaturation water quicklime powder, belonging to the technical field of environmental protection, dust removal and desulfurization. The desulfurization and dust removal device for sprayed supersaturation water quicklime powder comprises an electrostatic dust collector, a flue, a bag type dust collector, a spraying water atomizing system and a fly ash recirculating system, wherein the electrostatic dust collector is connected with one end of the flue, the bag type dust collector is connected with the other end of the flue, an opening of the spraying water atomizing system is arranged at the end of the flue, close to the electrostatic dust collector; the spraying water atomizing system can spray water mist into the flue; an opening of the fly ash recirculating system is arranged at the end of the flue, far away from the electrostatic dust collector, and connected with the bag type dust collector; and the fly ash recirculating system can spray a mixture of CaO and the fly ash into the flue. The fly ash is from a hopper of the bag type dust collector.

Description

Supersaturation water sprays the calcium lime powder desulfation dust-extraction device
Technical field
The utility model relates to a kind of supersaturation water and sprays the calcium lime powder desulfation dust-extraction device, belongs to environmental protection dust-removal and desulfurizing technical field.
Background technology
The supply of the electric power energy of the existing China overwhelming majority comes from the coal-burning power plant, and in one quite long from now on period, coal fired power generation is still the main supply of electric power mode of China.And coal fire discharged SO 2Account for 87% (account for fuel combustion discharge capacity 93%) of all kinds of pollution sources (fuel combustion source, industrial waste gas source, mobile source) total release.Along with the increase of China's SO2 emissions, it is higher than environmental bearing capacity far away, causes by SO 2The acid rain pollution that causes is serious, and the acid rain area accounts for 30% of area, becomes the acid rain heavily contaminated district after Europe, North America.State Bureau of Environmental Protection is a kind of control SO in the requirement of constantly strictly regulating coal-burning power plant's all contaminations discharging and adopt desulfur technology 2The effective ways of discharging.
The major technique of handling coal-burning power plant's sulfur dioxide (SO2) emissions at present is desulfurization by dry method and wet desulphurization technology, and for relatively short active service boiler in service life, it is unaccommodated needing the wet process of FGD technology of big fund input; And there is spatial constraints in some Installation in Plant FGD; Some unit can only move when peak regulation simultaneously, therefore, considers the equipment input; Floor space; Operation and running cost, desulfurization by dry method sorbent injection desulfurization flow process is simple, can reach medium desulfurized effect with lower investment.A new generation's flue gas dry desulfurizing technology has overcome that traditional semi-dry process flue gas desulphurization technology is used slurrying or water spray and the drawback brought has characteristics such as operation is simple and reliable, facility compact, load is adjustable, and its key reaction is:
CaO(s)+H 2O(l)→Ca(OH) 2(s) (1)
Ca(OH) 2(s)+?SO 2?(g)→CaSO 3(s)+H 2O(l) (2)
But flue gas dry desulfurizing technology of new generation still exists, and calcium sulfur ratio height, desulfuration efficiency are low, accessory substance can not commercialization etc. shortcoming, thereby influence environment, pollute.
The utility model content
The utility model technical problem to be solved provides a kind of reasonable in design, desulfuration efficiency is high, equipment manufacturing cost is low, spray the calcium lime powder desulfation dust-extraction device with the compatible good supersaturation water of existing equipment.
It is that a kind of supersaturation water sprays the calcium lime powder desulfation dust-extraction device that the utility model solves the problems of the technologies described above the technical scheme that is adopted; Comprise electrostatic precipitator, flue, sack cleaner; Said electrostatic precipitator links to each other with an end of flue;, sack cleaner links to each other with the other end of flue, and its design feature is: also be provided with water spraying atomization system, fly ash re-injection system; Described water spraying atomization system is opened on the nearly electrostatic precipitator end of flue; Said water spraying atomization system sprays water smoke in flue, said fly ash re-injection system is opened on the electrostatic precipitator end far away of flue and links to each other with sack cleaner, and said fly ash re-injection system sprays the mixture of CaO and flying dust in flue.Said flying dust is a sack cleaner ash bucket ash.
As preferably, the described water spraying atomization of the utility model system is made up of atomizer, pressure water pump, water tank, is linked to each other by pipeline between atomizer and the water tank, and described pipeline is provided with pressure water pump, and said atomizer is opened on flue.
As preferably; The described fly ash re-injection system of the utility model is made up of sack cleaner, powder storehouse, ashes blending tank, circulating ash pump, circulating ash nozzle; Said sack cleaner links to each other with the other end of flue, and said powder storehouse links to each other with sack cleaner, and said ashes blending tank links to each other with the circulating ash pump with the powder storehouse simultaneously; Said circulating ash pump links to each other with the circulating ash nozzle, and said circulating ash nozzle opening is in flue.
As preferably; The described atomizer of the utility model is made up of nozzle body, tube connector, access panel; Said access panel is provided with the even number tangential inlet; Said nozzle body and access panel surround the rotating room jointly, and the lower end of said rotating room is provided with nozzle bore, at the end of nozzle body the outlet diffusor that rainy nozzle bore links to each other are set.Water is got in the rotating room by the even number tangential inlet and rotates, after the nozzle bore eddy flow is sprayed by outlet diffusor.
As preferably, the described even number tangential inlet of the utility model is two inlets inlet, four tangential inlets or six tangential inlets.
The utility model is compared with prior art and is had the following advantages and effect: the application of the utility model apparatus and method, can obviously improve the desulfuration efficiency of dry desulfurizing process; Existing equipment can access good use, only needs flue is carried out minor modifications, has simplified the thermal power plant tail gas treatment process greatly, has saved investment cost and operating cost.Add thermal power plant's quick lime commonly used, greatly facilitate the improvement project of a lot of power plant, be worthy to be popularized; Dust granules had removal effect preferably.To SO 3Has removal effect preferably.Can reach higher desulfuration efficiency, and calcium sulfur ratio flue gas dry desulfurizing technology more of new generation is lower.Because present technique only needs on the basis of original flue gas equipment, to increase water spraying atomization system and fly ash re-injection system, so improvement expenses is low, pollutant removal is good, should vigorously promote the use.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the structural representation of the utility model atomizer.
Fig. 3 is the cross-sectional view of the utility model atomizer.
Fig. 4 is another cross-sectional view of the utility model atomizer.
Fig. 5 is the another cross-sectional view of the utility model atomizer.
Label declaration: electrostatic precipitator 1, circulating ash nozzle 2, atomizer 3, pressure water pump 4, water tank 5, sack cleaner 6, powder storehouse 7, ashes blending tank 8, circulating ash pump 9, flue 10, water spraying atomization system 11, fly ash re-injection system 12, even number tangential inlet 13, rotating room 14, nozzle bore 15, outlet diffusor 16, nozzle body 17, tube connector 18, access panel 19.
The specific embodiment
Below in conjunction with embodiment the utility model is done further detailed description, following examples are to the explanation of the utility model and the utility model is not limited to following examples.
Embodiment 1: shown in Fig. 1 to 5, the supersaturation water of present embodiment sprays the calcium lime powder desulfation dust-extraction device and method is made up of electrostatic precipitator 1, flue 10, water spraying atomization system 11, fly ash re-injection system 12.
The water spraying atomization system 11 that supersaturation water sprays the calcium lime powder desulfation dust-extraction device comprises atomizer 3, pressure water pump 4, water tank 5; Water in the water tank 5 is after pressure water pump 4 is transported to atomizer 3; Mix with flue gas in flue through atomizer 3 atomized sprays, make flue gas be in saturation state.
The fly ash re-injection system 12 that supersaturation water sprays the calcium lime powder desulfation dust-extraction device comprises powder storehouse 7, ashes blending tank 8, circulating ash pump 9, circulating ash nozzle 2.
Sack cleaner 6 is collected the flying dust in the flue gases, and the part flying dust mixes in ashes blending tank 8 with CaO in the powder storehouse 7 after circulating ash nozzle 2 sprays in the flue and the flue gas hybrid reaction.
Flue gas passes through electrostatic precipitator 1, in flue 10, mixes the formation saturation state with the water smoke that water spraying atomization system 11 sprays earlier, and the circulating ash hybrid reaction of back and fly ash re-injection system 12 ejections is after the entering chimney is directly discharged after sack cleaner 6 dedustings.
As shown in Figure 2, atomizer 3 comprises even number tangential inlet 13, rotating room 14, nozzle bore 15, outlet diffusor 16, and water is by rotating in the even number tangential inlet 13 entering rotating rooms 14, after nozzle bore 15 eddy flows are by outlet diffusor 16 ejections.
Even number tangential inlet 13 comprises two inlets inlet, four tangential inlets, six tangential inlets.
Novel supersaturation water sprays the calcium lime powder sulfur method: after carrying out dedusting from the flue gas elder generation process electrostatic precipitator 1 of boiler; In flue 10, get into water spraying atomization system 11; Water spraying atomization system 11 sprays into a large amount of water smoke through atomizer 3 and forms hypersaturated state by flue gas; Through fully mixing and after one period reaction time, water smoke and flue gas mix, and with flue gas in SO 2Fully reaction generates H 2SO 3The back gets into fly ash re-injection system 12; Fly ash re-injection system 12 sprays into excessive CaO through ashes nozzle 2 or is mixed with the circulating ash of CaO; Is 40~150 times at boiler load 30%~100% for the circulating ratio of circulating ash under the condition, CaO wherein and the H in the flue gas 2SO 3Reaction generates CaSO 3, and Ca/S gets 1.05-1.2, excessive CaO can generate Ca (OH) with aqueous water bone dry wherein 2, the clean flue gas in back gets into chimney and directly discharges after sack cleaner 6 dedustings.Wherein water spraying atomization is through compression pump the water in the water tank to be sprayed through atomizer to mix with flue gas, and circulating ash is to mix back circulation spray people's with fresh CaO by the flying dust that sack cleaner is collected.
Novel supersaturation water sprays the calcium lime powder sulfur method and selects first work of water sprinkling for better material moisture to make flue gas be in hypersaturated state, SO 2Generate H 2SO 3, after spray into the CaO and the H of CaO or combination ash 2SO 3React the key reaction of its sweetening process:
SO 2(g)+H 2O(l)→H 2SO 3(l) (3)
H 2SO 3(l)+CaO(s)→CaSO 3(s)+H 2O(l) (4)
Wherein reaction (3) is the vapour-liquid reaction, and reaction speed is fast, and reaction (4) is a liquid-solid reaction, and reaction speed is also very fast, so this technology can significantly improve desulfuration efficiency.
This technology is to SO 3Control also have higher efficacy because SO 3Very easily be dissolved in the oversaturated steam and form H 2SO 4, the H of generation 2SO 4Can generate CaSO with CaO fast 4Thereby, with SO 3From flue gas, remove.Because flue gas through after electrostatic precipitator 1 dedusting, passes through sack cleaner 6 dedustings again, and then can reach higher dust removing effects earlier.
Novel supersaturation water sprays the calcium lime powder desulfation dust-extraction device and method can reach higher desulfuration efficiency, in desulfurization, can remove the SO in the flue gas 3Amount, and can reach higher dust removing effects.In addition, only need flue is carried out minor modifications, simplified the thermal power plant tail gas treatment process, saved investment cost and operating cost, made things convenient for the improvement project of a lot of power plant, be worthy to be popularized.
In addition, need to prove, the specific embodiment described in this specification, its zero, the shape of parts, institute's title of being named etc. can be different.Allly conceive equivalence or the simple change that described structure, characteristic and principle are done, include in the protection domain of the utility model patent according to the utility model patent.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment; Only otherwise depart from the structure of the utility model or surmount the defined scope of these claims, all should belong to the protection domain of the utility model.

Claims (5)

1. a supersaturation water sprays the calcium lime powder desulfation dust-extraction device; Comprise electrostatic precipitator, flue, sack cleaner; Said electrostatic precipitator links to each other with an end of flue, and sack cleaner links to each other with the other end of flue, it is characterized in that: also be provided with water spraying atomization system, fly ash re-injection system; Described water spraying atomization system is opened on the nearly electrostatic precipitator end of flue; Said water spraying atomization system sprays water smoke in flue, said fly ash re-injection system is opened on the electrostatic precipitator end far away of flue and links to each other with sack cleaner, and said fly ash re-injection system sprays the mixture of CaO and flying dust in flue.
2. supersaturation water according to claim 1 sprays the calcium lime powder desulfation dust-extraction device; It is characterized in that: described water spraying atomization system is made up of atomizer, pressure water pump, water tank; Link to each other by pipeline between atomizer and the water tank; Described pipeline is provided with pressure water pump, and said atomizer is opened on flue.
3. supersaturation water according to claim 1 sprays the calcium lime powder desulfation dust-extraction device; It is characterized in that: described fly ash re-injection system is made up of sack cleaner, powder storehouse, ashes blending tank, circulating ash pump, circulating ash nozzle; Said sack cleaner links to each other with the other end of flue, and said powder storehouse links to each other with sack cleaner, and said ashes blending tank links to each other with the circulating ash pump with the powder storehouse simultaneously; Said circulating ash pump links to each other with the circulating ash nozzle, and said circulating ash nozzle opening is in flue.
4. supersaturation water according to claim 2 sprays the calcium lime powder desulfation dust-extraction device; It is characterized in that: described atomizer is made up of nozzle body, tube connector, access panel; Said access panel is provided with the even number tangential inlet; Said nozzle body and access panel surround the rotating room jointly, and the lower end of said rotating room is provided with nozzle bore, at the end of nozzle body the outlet diffusor that rainy nozzle bore links to each other are set.
5. supersaturation water according to claim 4 sprays the calcium lime powder desulfation dust-extraction device, it is characterized in that: described even number tangential inlet is two inlets inlet, four tangential inlets or six tangential inlets.
CN2011202739062U 2011-07-30 2011-07-30 Desulfurization and dust removal device for sprayed supersaturation water quicklime powder Expired - Lifetime CN202224058U (en)

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CN2011202739062U CN202224058U (en) 2011-07-30 2011-07-30 Desulfurization and dust removal device for sprayed supersaturation water quicklime powder

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Application Number Priority Date Filing Date Title
CN2011202739062U CN202224058U (en) 2011-07-30 2011-07-30 Desulfurization and dust removal device for sprayed supersaturation water quicklime powder

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102302897A (en) * 2011-07-30 2012-01-04 华电电力科学研究院 Device and method for desulfurization and dust removal by spraying quick lime powder with supersaturation water
CN107952296A (en) * 2017-10-25 2018-04-24 中钢集团天澄环保科技股份有限公司 A kind of agglomerates of sintered pellets flue gas multiple pollutant cooperated purification system based on bag-type dusting

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102302897A (en) * 2011-07-30 2012-01-04 华电电力科学研究院 Device and method for desulfurization and dust removal by spraying quick lime powder with supersaturation water
CN107952296A (en) * 2017-10-25 2018-04-24 中钢集团天澄环保科技股份有限公司 A kind of agglomerates of sintered pellets flue gas multiple pollutant cooperated purification system based on bag-type dusting
CN107952296B (en) * 2017-10-25 2020-01-14 中钢集团天澄环保科技股份有限公司 Sintered pellet flue gas multi-pollutant collaborative purification system based on bag type dust removal

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Granted publication date: 20120523