CN109745812A - The technology and device of realization pollutant near-zero release are administered in a kind of dry, wet process collaboration - Google Patents
The technology and device of realization pollutant near-zero release are administered in a kind of dry, wet process collaboration Download PDFInfo
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- CN109745812A CN109745812A CN201711125769.6A CN201711125769A CN109745812A CN 109745812 A CN109745812 A CN 109745812A CN 201711125769 A CN201711125769 A CN 201711125769A CN 109745812 A CN109745812 A CN 109745812A
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Abstract
The present invention realizes pollutant near-zero release for smoke gas treatment and realizes the technical solution of desulfurization wastewater zero-emission simultaneously are as follows: a kind of using dry, the technique device realized pollutant near-zero release and realize desulfurization wastewater zero-emission simultaneously is administered in wet flue gas collaboration, it includes dry method desulfuration system equipment, dry type (electricity or bag) dust pelletizing system equipment, wet desulfurization system equipment, desulfurization wastewater spray system and equipment, in each system equipment, external mounting pipeline and relevant valve etc., it is characterized by: the dry method desulfuration system equipment, dry type (electricity or bag) dust pelletizing system equipment, wet desulfurization system equipment, equipment is connected by said sequence.Desulfurization wastewater spray system is connected with dry method desulfuration system equipment and wet desulfurization system equipment respectively.The waste water that wet desulfurization system generates sprays into the evaporation of dry method desulfuration system equipment by biphase gas and liquid flow air self-priming and pressure double-level atomizing nozzle, realizes desulfurization wastewater zero-emission.
Description
Technical field:
The invention belongs to flue gas pollutant Treatment process fields, are related to a kind of dry, wet fuel gas desulfurizing technology series connection, collaboration
Pollution administration object realizes near-zero release and realizes the technology and device of desulfurization wastewater zero-emission simultaneously, be suitable for thermal power plant,
The flue gas purification system of the industries such as Ferrous Metallurgy, petrochemical industry, building materials.
Background technique:
Coal-fired station is considered pollutant emission rich and influential family, SO by society for a long time2And the atmosphere such as NOx, flue dust
One of main source of pollutant emission.Although country constantly updates thermal power plant environmental emission standard, pollutant row is improved
Limit value requirement is put, electricity power enterprise also actively injects capital into and the transformation of equipment progress environmental protection aspect, but coal-fired station
Pollutant emission concentration and total amount be still higher than other clean energy resourcies, for alleviate electricity needs and social enviroment protection require it is continuous tight
The contradiction of lattice, country propose coal electricity upgrading action plan, by under National Development and Reform Committee, Environmental Protection Department, National Energy Board's joint
Generating for hair changes [2014] No. 2093 files of the energy " coal electricity energy-saving and emission-reduction upgrading and transformation action plan (2014-2020) " clearly
It is proposed target and the time limit of coal electricity transformation, it is desirable that eastern region (Liaoning, Beijing, Tianjin, Hebei, Shandong, Shanghai, Jiangsu, Zhejiang
11 provinces and cities such as river, Fujian, Guangdong, Hainan) newly-built Thermal generation unit Air Pollutant Emission concentration basically reaches gas turbine
(i.e. under the conditions of benchmark oxygen content 6%, flue dust, sulfur dioxide, discharged nitrous oxides concentration are respectively no higher than group emission limit
10,35,50 milligram/cubic metre), middle part (8 province such as Heilungkiang, Jilin, Shanxi, Anhui, Hubei, Hunan, Henan, Jiangxi)
New-built unit is close to or up to gas turbine group emission limit in principle, and west area new-built unit is encouraged to be close to or up to combustion gas
Take turns unit emission limit.On December 11st, 2015, the ring issued is combined by Environmental Protection Department, National Development and Reform Committee, National Energy Board
[2015] No. 164 files of hair are " logical about what is printed and distributed and " implement in full coal-burning power plant's minimum discharge and reducing energy consumption programme of work "
Know " it clearly proposes to accelerate the minimum discharge transformation paces of active service coal electricity, eastern region minimum discharge transformation task is advanced to 2017
It is totally completed before year, middle part strives being basically completed before 2018, and west area was completed before 2020.Some economy
Flourishing area is to alleviate electricity needs to require growing contradiction with social enviroment protection, is proposed more tightened up than national standard
Pollutant emission index.Guangdong that State Development and Reform Commission, Guangdong Province prints and distributes hair changes can [2015] No. 2102 files by means of emails or letters, it is desirable that the whole province's coal
Motor group " basically reaches gas turbine group emission limit ", i.e. NOx, SO2, smoke dust discharge concentration be not higher than 50mg/Nm3、35mg/
Nm3、10mg/Nm3；Encourage Pearl River Delta regional " reaching gas turbine group emission limit ", i.e. NOx, SO2, smoke dust discharge concentration it is not high
In 50mg/Nm3、35mg/Nm3、5mg/Nm3。
Country's coal-burning power plant's minimum discharge renovation technique route is essentially all wet using single limestone-gypsum at present
Method flue gas desulfurization technique proposes effect, and not only energy consumption is high, handles HCl, HF and SO in flue gas3Low efficiency, and the waste water generated is difficult
Processing.
Summary of the invention:
The technical problem to be solved in the present invention is that overcoming the deficiencies of the prior art and provide a kind of dry, wet flue gas collaboration
Administer the technology and device realized pollutant near-zero release and realize desulfurization wastewater zero-emission simultaneously.
Using dry, wet fuel gas desulfurizing technology series connection, joint removing HCl, HF, SO2、SO3, all contaminants such as flue dust, it is real
The real near-zero release of existing pollutant.The process water reacted using the waste water that wet desulphurization generates as dry desulfurization is solved
Desulfurization wastewater is difficult, the problem of can not discharging.
C1 is enriched in desulfurization wastewater-、F-And heavy metal element, salt content is higher, chlorine ion concentration up to 20000ppm,
General wastewater processing technology is only adjustable pH value, removes oil removal and part heavy metal etc., not can be removed in desulfurization wastewater
High salt, therefore even across cost with high investment treated waste water due to salt content too it is high be also difficult to be back to production or
In life, in most cases can only outlet, water environment is adversely affected.This method is intended in dry desulfurization device desulfurizing tower
Desulfurization wastewater is atomized into average grain diameter less than 100 μm by upper setting biphase gas and liquid flow air self-priming and pressure double-level atomizing nozzle
Fine droplet.And 110~130 DEG C of temperature of dry desulfurization device desulfurizing tower inlet flue gas, small waste water drop is made by high-temperature flue gas
It is evaporated rapidly with lower, the salinity of waste water dissolution is attached in flying dust, is removed in the deduster after desulfurization, to reach de-
The purpose of sulphur wastewater zero discharge.Meanwhile after flue gas completes evaporation, temperature is reduced, and humidity increases, so that flue gas is de- in wet process
Evaporation in sulphur absorption tower greatly weakens, and theoretically absorption tower evaporated water can reduce the waste water evaporation capacity of equivalent.
The invention patent realizes pollutant near-zero release for smoke gas treatment and realizes the skill of desulfurization wastewater zero-emission simultaneously
Art scheme are as follows: a kind of that realization pollutant near-zero release is administered using dry, wet flue gas collaboration and realizes desulfurization wastewater zero-emission simultaneously
The technique device put, it includes dry method desulfuration system equipment, dry type (electricity or bag) dust pelletizing system equipment, wet desulfurization system
Pipeline and relevant valve etc., feature are assembled by equipment, desulfurization wastewater spray system and equipment, each inside and outside portion of system equipment
Be: the dry method desulfuration system equipment, dry type (electricity or bag) dust pelletizing system equipment, wet desulfurization system equipment, equipment are pressed
Said sequence is connected.Desulfurization wastewater spray system is connected with dry method desulfuration system equipment and wet desulfurization system equipment respectively.It is wet
The waste water that method desulphurization system generates sprays into the evaporation of dry method desulfuration system equipment and realizes desulfurization wastewater zero-emission.
The present invention realizes desulfurization wastewater zero-emission compared with prior art for realizing pollutant near-zero release and simultaneously, no
But HCl, HF, SO in flue gas can be removed2、SO3, all contaminants such as flue dust, realize the real near-zero release of pollutant and de-
Sulphur wastewater zero discharge, and the consumption of system water can be reduced, station service is saved, save steam energy, reduce initial cost and fortune
Row expense.
Therefore, beneficial effect of the present invention generally speaking, may be summarized to be the following:
1): utilizing HCl, HF, SO in dry desulfurizing process efficient removal flue gas3The characteristics of, wet processing can be made up and existed
The deficiency of this respect.Meet higher, tighter requirement of the country to atmosphere pollutants emission standards from now on.
2): using dry, wet fuel gas desulfurizing technology series connection compared with using single wet fuel gas desulfurizing technology, into wet process
The desulfuration efficiency that the flue-gas temperature of desulfurizer is greatly reduced, needs is greatly lowered, so that wet process of FGD be greatly decreased
Wet desulphurization device cost is greatly decreased in appliance arrangement capacity, so that gross investment is remained less than using conventional single wet process cigarette
Desulfurization device.And wet desulphurization device technique water consumption is reduced, water resource is saved.
3): the waste water that conventional single wet fuel gas desulfurizing technology generates, processing is very difficult, and handles investment and operation
Cost is all very high, using dry, wet process serial sulfur removal technology, can dissolve the waste water of wet fuel gas desulfurizing technology generation, reduce
Desulfurization wastewater expense is handled, and can also accomplish wastewater zero discharge, is conducive to protect environment.
4): utilizing biphase gas and liquid flow air self-priming and pressure double-level atomizing nozzle, desulfurization wastewater is atomized into average grain diameter
Fine droplet less than 100 μm is conducive to waste water drop by high-temperature flue gas and acts on lower evaporation rapidly, and the salt of waste water dissolution is divided attached
In flying dust, achieved the purpose that receive waste water.
5): biphase gas and liquid flow air self-priming and pressure double-level atomizing nozzle aperture have to be not easy to plug greatly and (have 8 Φ 7mm's
Spray orifice), the small (D of particle3280-150 microns), the characteristics of pressure is low (3-5bar, wear-resistant), low energy consumption (save operating cost),
It is high (spray gun quantity is more, and aperture is small, easily blocks) to overcome conventional high-tension system spray gun maintenance cost, operating cost is high, and (pressure is very
High 40bar, energy consumption are big), easy wet bottom, wet wall (about 500 microns of atomizing particle or more) deficiency.
Detailed description of the invention:
Fig. 1 is dry, the wet fuel gas desulfurizing technology series connection that this patent provides, collaboration pollution administration object realize near-zero release and
The process flow diagram of desulfurization wastewater zero-emission is realized simultaneously.
Fig. 2 is the biphase gas and liquid flow air self-priming and pressure double-level atomizing nozzle device structure chart that this patent provides.
In figure: electric (bag) deduster 4. wet desulphurization device, 5. desulfurization wastewaters of 1. flue, 2. dry desulfurization device 3. are defeated
Send pump 6. desulfurization wastewater pipeline, 7. desulfurization wastewater atomizer, 8. nozzle head, 9. atomization conduit, 10. waste water inlet port 11.
12. compressed air inlet port of air suction inlet, 13. jet hole.
Specific embodiment:
With reference to the accompanying drawing and specific embodiment does one kind of the invention, wet process collaboration administers and realizes the nearly zero-emission of pollutant
The technology and device put are described further.As shown in attached drawing 1,2.
Attached drawing 1: the flue gas from boiler tail air preheater is delivered to dry desulfurization device 2 through flue 1, and flue gas is in dry method
Efficient removal SO in desulfurizer2、SO3, after HCl, HF, through 3 dedusting of electric (bag) deduster, then after enter to wet desulphurization device 4
The real near-zero release of pollutant is realized in further desulfurization.The waste water generated after 4 desulfurization of wet desulphurization device is through desulfurization wastewater
Delivery pump 5, desulfurization wastewater pipeline 6. and desulfurization wastewater atomizer 7 spray into dry desulfurization device evaporation.Realize desulfurization wastewater
Zero-emission.
Attached drawing 2: biphase gas and liquid flow air self-priming and pressure double-level atomizing nozzle device are by 8. nozzle head, 9. atomization conduit
10. 11. air suction inlet of waste water inlet port, 12. compressed air inlet port, 13. jet hole is constituted.
Desulfurization wastewater from certain pressure enters injection apparatus (injector) waterwater entrance 10, is throttled by injection apparatus
Afterwards, the rapid expansion of form exhausted water, and air is sucked in air suction inlet 11, it mixes with air to form two phase flow, and subsequent
Continuation is further mixed with compressed air inlet port 12, by the flowing in injection apparatus, forms two media (waste water and pressure
Contracting air) phase transformation, waste water is finally blown and transforms into film and to tear liquid film forming tiny by heat transfer, mass transfer, diffusion, turbulence etc.
(D32It is 80-150 microns, average less than 100 microns) drop.
Above-listed detailed description is illustrating for one of the novel possible embodiments of this patent, the embodiment not to
This patent range is limited, all equivalence enforcements or change without departing from carried out by the present invention are intended to be limited solely by the scope of the patents of this case.
Claims (5)
1. it is a kind of for doing, wet flue gas collaboration administer realize pollutant near-zero release technology.It includes dry method desulfuration system
Equipment, dry type (electricity or bag) dust pelletizing system equipment, wet desulfurization system equipment, desulfurization wastewater spray system and equipment are each to be
Assemble pipeline and relevant valve etc. in the inside and outside portion of equipment of uniting, it is characterised in that: the dry method desulfuration system equipment, dry type (electricity
Or bag) dust pelletizing system equipment, wet desulfurization system equipment, equipment are connected by said sequence.Desulfurization wastewater spray system difference
It is connected with dry method desulfuration system equipment and wet desulfurization system equipment.The waste water that wet desulfurization system generates sprays into dry desulfurization system
Equipment of uniting realizes desulfurization wastewater zero-emission.
2. being used to do according to claim 1, the technology for realizing pollutant near-zero release, feature are administered in wet flue gas collaboration
It is: the dry method desulfuration system equipment and dry type (electricity or bag) dust pelletizing system equipment composition desulphurizing and dust-removing integral, processing
HCl, HF, SO in flue gas2、SO3, the pollutants such as flue dust.
3. being used to do according to claim 2, the technology for realizing pollutant near-zero release, feature are administered in wet flue gas collaboration
It is: the waste water that dry method desulfuration system equipment receives wet process of FGD to generate, the work as dry method desulfuration system desulphurization reaction
Skill water realizes the zero-emission of desulfurization wastewater.
4. being used to do according to claim 3, the technology for realizing pollutant near-zero release, feature are administered in wet flue gas collaboration
Be: wet desulfurization system equipment is further processed HCl, HF, SO in flue gas2、SO3, the pollutants such as flue dust, it is final to realize pollution
The near-zero release of object.
5. being used to do according to claim 4, the technology for realizing pollutant near-zero release, feature are administered in wet flue gas collaboration
It is: sprays into the nozzle of dry method desulfuration system equipment using biphase gas and liquid flow air self-priming and pressure double atomization, there is particle
It is small be not easy to plug, the characteristics of pressure is low, low energy consumption.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711125769.6A CN109745812A (en) | 2017-11-06 | 2017-11-06 | The technology and device of realization pollutant near-zero release are administered in a kind of dry, wet process collaboration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711125769.6A CN109745812A (en) | 2017-11-06 | 2017-11-06 | The technology and device of realization pollutant near-zero release are administered in a kind of dry, wet process collaboration |
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| Publication Number | Publication Date |
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| CN109745812A true CN109745812A (en) | 2019-05-14 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168118A (en) * | 2006-10-25 | 2008-04-30 | 宝山钢铁股份有限公司 | Sintering smoke wet method sulphur removing and dust removing technology |
| CN204502708U (en) * | 2015-03-13 | 2015-07-29 | 北京中能诺泰节能环保技术有限责任公司 | Wet desulphurization waste water utilization system |
| CN205700120U (en) * | 2016-06-29 | 2016-11-23 | 浙江海元环境科技有限公司 | A kind of wet method sulphur removing and dust removing integrated apparatus |
| CN106582232A (en) * | 2017-02-08 | 2017-04-26 | 江苏佳鑫环保工程有限公司 | Synergistic removal tending to zero discharge purification process and equipment for multicomponent pollutants in flue gas |
-
2017
- 2017-11-06 CN CN201711125769.6A patent/CN109745812A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168118A (en) * | 2006-10-25 | 2008-04-30 | 宝山钢铁股份有限公司 | Sintering smoke wet method sulphur removing and dust removing technology |
| CN204502708U (en) * | 2015-03-13 | 2015-07-29 | 北京中能诺泰节能环保技术有限责任公司 | Wet desulphurization waste water utilization system |
| CN205700120U (en) * | 2016-06-29 | 2016-11-23 | 浙江海元环境科技有限公司 | A kind of wet method sulphur removing and dust removing integrated apparatus |
| CN106582232A (en) * | 2017-02-08 | 2017-04-26 | 江苏佳鑫环保工程有限公司 | Synergistic removal tending to zero discharge purification process and equipment for multicomponent pollutants in flue gas |
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