CN107648978A - Wet desulfurization flue gas eliminates plume system and method - Google Patents
Wet desulfurization flue gas eliminates plume system and method Download PDFInfo
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- CN107648978A CN107648978A CN201711031032.8A CN201711031032A CN107648978A CN 107648978 A CN107648978 A CN 107648978A CN 201711031032 A CN201711031032 A CN 201711031032A CN 107648978 A CN107648978 A CN 107648978A
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- flue gas
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- condensing tower
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 239000003546 flue gas Substances 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 17
- 230000023556 desulfurization Effects 0.000 title claims abstract description 17
- 239000007921 spray Substances 0.000 claims abstract description 36
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 230000008030 elimination Effects 0.000 claims abstract 3
- 238000003379 elimination reaction Methods 0.000 claims abstract 3
- 238000001816 cooling Methods 0.000 claims description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 239000007789 gas Substances 0.000 claims description 22
- 238000009833 condensation Methods 0.000 claims description 18
- 230000005494 condensation Effects 0.000 claims description 18
- 238000005507 spraying Methods 0.000 claims description 14
- 239000000498 cooling water Substances 0.000 claims description 9
- 239000000428 dust Substances 0.000 claims description 9
- 239000000779 smoke Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 239000003500 flue dust Substances 0.000 claims description 2
- 230000000007 visual effect Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000004581 coalescence Methods 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0027—Condensation of vapours; Recovering volatile solvents by condensation by direct contact between vapours or gases and the cooling medium
- B01D5/003—Condensation of vapours; Recovering volatile solvents by condensation by direct contact between vapours or gases and the cooling medium within column(s)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0033—Other features
- B01D5/0051—Regulation processes; Control systems, e.g. valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
- B01D5/009—Collecting, removing and/or treatment of the condensate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The invention discloses a kind of wet desulfurization flue gas to eliminate plume system and method, predominantly solves " white haze " phenomenon caused by saturation wet flue gas directly discharges, the problems such as causing bad visual pollution.Described elimination plume system includes：Flue gas precooling zone, for carrying out precooling to flue gas；Condensing tower composition is sprayed, for being cooled to 30~40 DEG C to flue gas by spray.Flue gas precooling zone is connected with spray condensing tower by pipeline.The system and method can effectively alleviate saturation wet flue gas and discharge formed white haze phenomenon, compared with conventional GGH heats demisting：Simple system, initial cost save, and equipment operating cost is low, overhaul of the equipments, change easily.
Description
Technical field
The present invention relates to a kind of wet desulfurization flue gas to eliminate plume system.
Background technology
In saturated flue gas discharge process after wet desulphurization, because saturated flue gas and extraneous air carry out heat exchange, cigarette
Gas cools, and saturated steam condenses into water droplet, and forms white plume, causes bad visual impact；Meanwhile flue gas low-temperature discharges
It is unfavorable for plume rise；In addition, a large amount of moisture discharges cause ambient humidity, light and temperature excessive, resident living is influenceed.In order to improve flue gas
Lifting ability, mitigate plume phenomenon, many countries are strictly limited exhaust gas temperature, and Germany's regulation chimney emission exports warm
Degree is not less than 72 DEG C, and Japan is defined as 90~110 DEG C, and Britain's regulation is not less than 80 DEG C, and the U.S. is since the eighties in last century,
FGD has begun to select Wet chimney operation, and Some Enterprises increase combustion gas (or steam) after FGD and flue gas is heated,
To avoid flue gas from forming sedimentation under given conditions.
In order to avoid saturated flue gas condenses into water smoke in discharge process or mitigates the condensation phenomenon of saturated flue gas, according to
The Formation and characteristics of plume, mitigating the method that plume is formed includes heating means and dehumanization method.Heating means are i.e. full by improving
And flue-gas temperature, certain superheat state discharge is reached, this method needs to consume certain high temperature heat source, unsuitable remaining
Need to use combustion gas furnace to produce high-temperature flue gas in the case of heat, cause great energy waste；Dehumanization method passes through reduction
Saturated flue gas temperature, first by the Water vapor condensation part in flue gas, the water capacity of flue gas is reduced again by being arranged after demisting
Put, dehumanization method includes direct condensation and indirect heat exchange method, and indirect heat exchange usually requires to install the larger heat exchanger of volume additional, preceding
Phase Installed capital cost is high.
The content of the invention
In view of the above-mentioned problems, the present invention, which provides a kind of wet desulfurization flue gas, eliminates plume system, using directly spray mode
Saturation wet flue gas is cooled, saves equipment construction investment early stage and operating cost.
To reach above-mentioned purpose, wet desulfurization flue gas of the present invention eliminates plume system, including：
Flue gas precooling zone, for carrying out precooling to flue gas；
Spray condensing tower composition；For being cooled to 30~40 DEG C to flue gas by spray
Flue gas precooling zone is connected with spray condensing tower by pipeline.
Preferably, described precooling zone includes cooling stack, it is cold that described cooling stack is provided with first and/or second
But device and flue dust detection means；
When dust content is less than predetermined value, starts the second cooling device and flue gas is cooled down；
When dust content is more than predetermined value, starts the first cooling device and flue gas is cooled down.
Preferably, the first cooling device is the cooling nozzles being arranged in cooling stack, for by cooling circulating water forward
Or laterally spray into flue；Second cooling device is air heat exchanger.
Preferably, described spray condensing tower includes condensing tower；Pond is condensed in condensing tower lower disposed；On condensing tower
Portion is provided with more than two-stage cooling nozzles and demister；Flue gas precooling zone exhanst gas outlet is arranged in the middle part of condensing tower.
Preferably, flue gas precooling zone smoke outlet sets flue gas distributor, flue gas distributor is put down with condensation tank water face
Row is set.
Preferably, the system also includes cooling unit, cooling unit is by the condensate pump by pipeline communication, cooling tower
Formed with feeding spraying pump；Cooling tower inner bottom part is provided with water cooling pond；
Wherein, the condensed water in the condensation pond that condensate pump will spray tower bottom is pumped into cooling tower and condensed water cools；
The cooling water of water cooling pond is pumped into the cooling nozzles in condensing tower and/or cooling stack by feeding spraying pump.
Preferably, also including temperature control unit, temperature control unit includes control device and is arranged in condensing tower
Temperature sensor；
Described control device is controlled as follows according to temperature：
When spraying condensing tower flue gas exit temperature higher than setting exhanst gas outlet design temperature T, output control signal makes spray
Sprinkling pump increase condensation spray column cooling nozzles output；
When spraying condensing tower flue gas exit temperature less than setting exhanst gas outlet design temperature T, output control signal makes spray
Sprinkling pump reduces condensation spray column cooling nozzles output.
To reach above-mentioned purpose, wet desulfurization flue gas of the invention eliminates plume method, comprised the steps：
Precooling is carried out to flue gas by flue gas precooling zone；
30~40 DEG C are cooled to flue gas after precooling by spraying condensing tower spray.
Preferably, described flue gas precooling zone includes the step of carrying out precooling to flue gas；
When dust content is less than predetermined value, starts the second cooling device and flue gas is cooled down；
When dust content is more than predetermined value, starts the first cooling device and flue gas is cooled down；Wherein, described
One cooling device is the cooling nozzles being arranged in cooling stack, for cooling circulating water forward or laterally to be sprayed into flue；
Second cooling device air heat exchanger.
Preferably, the step of described spray, is：
When spraying condensing tower flue gas exit temperature higher than setting exhanst gas outlet design temperature T, increase condensation spray column is cold
But nozzle supplies water amount；
When spraying condensing tower flue gas exit temperature less than setting exhanst gas outlet design temperature T, it is cold to reduce condensation spray column
But nozzle supplies water amount.
The system and method can effectively alleviate saturation wet flue gas and discharge formed white haze phenomenon, be heated with conventional GGH
Demisting is compared：Simple system, initial cost save, and equipment operating cost is low, overhaul of the equipments, change easily.The condensing water temperature of collection
At 45~50 DEG C, local heating can be used in winter, save heating cost and operating cost.
Brief description of the drawings
Fig. 1 is that the wet flue gas in the embodiment of the present invention 1 eliminates plume technique and system flow schematic diagram；
Fig. 2 is that wet flue gas of the present invention eliminates plume technique and system flue gas distributor schematic diagram；
Fig. 3 is that the wet flue gas in the embodiment of the present invention 2 eliminates plume technique and system flow schematic diagram；
Fig. 4 is that the wet flue gas in the embodiment of the present invention 3 eliminates plume technique and system flow schematic diagram.
Embodiment
With reference to Figure of description, the present invention will be further described.
Embodiment 1
As shown in Figure 1-2, the wet flue gas of the present embodiment eliminates plume technique and system, is condensed by flue gas precooling zone 1, spray
Tower 2, cooling tower 3, water cooling pond 4, circulation are formed.
The main purpose of flue gas precooling zone 1 is pre- cooling, facilitates the temperature control of whole system, while is removed in flue gas
Solid particle, the flue-gas temperature of this section drop about 3~5 DEG C, and precooling nozzle 1.1 is arranged on flue gas precooling zone 1, is evenly distributed,
Precooling nozzle 1.1 at least arranges one layer, is supplied water by cooling water pump 6 to precooling nozzle 1.1.When dustiness is larger in flue gas, fit
When the cooling water inflow of increase precooling nozzle, dirt particle realizes flue gas ash removal effect by drop coalescence.
Spray condensing tower 2 by tower body 2, condensation pond 2.1, drainage 2.2, condensation-water drain 2.3, gas approach 2.4,
Flue gas distributor 2.5, cooling nozzles 2.6, demister 2.7, cooling water inlet 2.8, temperature measuring equipment 2.9, exhanst gas outlet
2.10 composition.Cooling nozzles 2.6 and demister 2.7 at least arrange 2 layers.
The flue gas containing aqueous water that flue gas precooling zone 1 comes out is at gas approach 2.4 due to the effect of centrifugal force, drop
It can impact on the outside of bend pipe wall, bottom condensate water pond 2.1 is dropped down onto under coalescence, realize the preliminary purification separation of gas-water drop.Cigarette
Gas after flue gas distributor 2.5 is uniform, be down to 0.5~2.5m/s and flow up by velocity of flue gas, with coming out from cooling nozzles 2.6
Cooling water carries out heat exchange, the saturated steam cooling condensation in flue gas, the machinery in flue gas is removed by demister 2.7
Water, go out flue gas mechanical water content≤75mg/m of demister 2.73, by the exhanst gas outlet 2.10 for spraying the contraction of the top of condensing tower 2
Discharged.
The condensed water out 2.3 of condensed water pressurizes into condensate pump 5, is delivered to cooling tower 3 and is cooled down, cooling water by
Cooling pond 4 is dropped down onto under Action of Gravity Field to be used as cooling circulating water.
Circulation is made up of condensate pump 5, cooling water pump 6 and control system 7.
Exhaust gas temperature is set：Different according to environment temperature, summer exhaust gas temperature is set as 35~40 DEG C, winter exhaust gas temperature
It is set as 30 DEG C.The setting of cooling tower coolant water temperature is not higher than 33 DEG C.
When the flue-gas temperature of temperature measuring equipment 2.9 exceedes design temperature, increase the output of cooling nozzles 2.6；When
When the flue-gas temperature of temperature measuring equipment 2.9 is less than design temperature, the output of cooling nozzles 2.6 is reduced.
Cooling tower 3 is generally combined by multiple monomer cooling towers and is formed in parallel, and the blower fan of cooling tower 3 is transported in summer rated load
OK, when environment temperature is relatively low, blower fan can open part or compared with being run under underload.
Embodiment 2
Such as Fig. 3, operation principle is same as Example 1, and the embodiment substitutes cooling tower 3 by heating heat user.In the winter time, factory
When area needs heating, by rationally controlling injection flow rate, ensure the condensation water temperature of pond 2.1 at 45~50 DEG C, the condensed water can be with
Used for local heating, after heat user exchanges, water temperature is down to 25 DEG C or so, sprays into spray by cooling nozzles 2.6 again
In condensing tower 2, recycle.When cold deficiency, cooling circulating water pump 6 is opened, by the cooling water in cooling pond 4 together pump
Enter cooling nozzles 2.6, ensure flue gas exit temperature in setting range.
Embodiment 3
Such as Fig. 4, operation principle is same as Example 1, and the embodiment substitutes precooling nozzle 1.1 by air heat exchanger 1.2.When
When dust content is relatively low less than corrosive gas content in 30mg/m3 and flue gas, air heat exchanger 1.2 can be placed in flue gas
In precooling zone 1, it can be transformed in 1 pipe diameter deficiency of flue gas precooling zone, facilitate air heat exchanger 1.2 to arrange, it is empty
Gas heats up 10 DEG C or so after air heat exchanger 1.2, and the volume flow of air is more than 1 times of flue gas flow, by heating
Air mixing spray condensing tower 2 top, is discharged after being mixed with condensed flue gas, and this kind of mode can will condense flue gas
Water capacity further reduces, and ensures to be completely eliminated " white haze " during exhaust.
More than, only presently preferred embodiments of the present invention, but protection scope of the present invention is not limited thereto is any to be familiar with sheet
Those skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in should all be covered
Within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by the protection domain that claim is defined.
Claims (10)
1. a kind of wet desulfurization flue gas eliminates plume system, it is characterised in that：Described elimination plume system includes：
Flue gas precooling zone, for carrying out precooling to flue gas；
Spray condensing tower composition；For being cooled to 30~40 DEG C to flue gas by spray
Flue gas precooling zone is connected with spray condensing tower by pipeline.
2. wet desulfurization flue gas as claimed in claim 1 eliminates plume system, it is characterised in that：Described precooling zone includes cooling
Flue, described cooling stack is provided with the first and/or second cooling device and flue dust detection means；
When dust content is less than predetermined value, starts the second cooling device and flue gas is cooled down；
When dust content is more than predetermined value, starts the first cooling device and flue gas is cooled down.
3. wet desulfurization flue gas as claimed in claim 1 eliminates plume system, it is characterised in that：First cooling device is to be arranged on
Cooling nozzles in cooling stack, for cooling circulating water forward or laterally to be sprayed into flue；Second cooling device is air
Heat exchanger.
4. wet desulfurization flue gas as claimed in claim 1 eliminates plume system, it is characterised in that：Described spray condensing tower includes
Condensing tower；Pond is condensed in condensing tower lower disposed；The cooling nozzles and demister of more than two-stage are provided with condensing tower top；
Flue gas precooling zone exhanst gas outlet is arranged in the middle part of condensing tower.
5. wet desulfurization flue gas as claimed in claim 1 eliminates plume system, it is characterised in that：Flue gas precooling zone smoke outlet
Flue gas distributor is set, and flue gas distributor be arranged in parallel with condensation tank water face.
6. wet desulfurization flue gas as claimed in claim 1 eliminates plume system, it is characterised in that：It is single that the system also includes cooling
Member, cooling unit the condensate pump, cooling tower and feeding spraying pump of pipeline communication by being made up of；Cooling tower inner bottom part is provided with cold
Pond；
Wherein, the condensed water in the condensation pond that condensate pump will spray tower bottom is pumped into cooling tower and condensed water cools；Spray
The cooling water of water cooling pond is pumped into the cooling nozzles in condensing tower and/or cooling stack by water pump.
7. wet desulfurization flue gas as claimed in claim 1 eliminates plume system, it is characterised in that：Also include temperature control unit,
Temperature control unit includes control device and the temperature sensor being arranged in condensing tower；
Described control device is controlled as follows according to temperature：
When spraying condensing tower flue gas exit temperature higher than setting exhanst gas outlet design temperature T, output control signal makes shower water
Pump increase condensation spray column cooling nozzles output；
When spraying condensing tower flue gas exit temperature less than setting exhanst gas outlet design temperature T, output control signal makes shower water
Pump reduces condensation spray column cooling nozzles output.
8. a kind of wet desulfurization flue gas eliminates plume method, it is characterised in that：Described elimination plume method comprises the steps：
Precooling is carried out to flue gas by flue gas precooling zone；
30~40 DEG C are cooled to flue gas after precooling by spraying condensing tower spray.
9. wet desulfurization flue gas as claimed in claim 8 eliminates plume method, it is characterised in that：Described flue gas precooling zone pair
The step of flue gas progress precooling, includes；
When dust content is less than predetermined value, starts the second cooling device and flue gas is cooled down；
When dust content is more than predetermined value, starts the first cooling device and flue gas is cooled down；Wherein, described first is cold
But device is the cooling nozzles being arranged in cooling stack, for cooling circulating water forward or laterally to be sprayed into flue；Second
Cooling device air heat exchanger.
10. wet desulfurization flue gas as claimed in claim 8 eliminates plume method, it is characterised in that：The step of described spray
For：
When spraying condensing tower flue gas exit temperature higher than setting exhanst gas outlet design temperature T, increase condensation spray tower cooler spray
Mouth output；
When spraying condensing tower flue gas exit temperature less than setting exhanst gas outlet design temperature T, condensation spray tower cooler spray is reduced
Mouth output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711031032.8A CN107648978B (en) | 2017-10-27 | 2017-10-27 | Wet desulfurization flue gas smoke plume eliminating system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711031032.8A CN107648978B (en) | 2017-10-27 | 2017-10-27 | Wet desulfurization flue gas smoke plume eliminating system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107648978A true CN107648978A (en) | 2018-02-02 |
| CN107648978B CN107648978B (en) | 2024-03-22 |
Family
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| CN201711031032.8A Active CN107648978B (en) | 2017-10-27 | 2017-10-27 | Wet desulfurization flue gas smoke plume eliminating system and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108744575A (en) * | 2018-07-31 | 2018-11-06 | 中国大唐集团科学技术研究院有限公司西北分公司 | A kind of device and removing method for eliminating power plant's white cigarette |
| CN109173563A (en) * | 2018-11-19 | 2019-01-11 | 福建南方路面机械有限公司 | A kind of exhaust treatment system of bituminous mixing plant |
| CN109240240A (en) * | 2018-10-18 | 2019-01-18 | 南京工业大学 | A kind of method of determining wet-method desulfurized fume white plume control line |
| CN109289430A (en) * | 2018-11-07 | 2019-02-01 | 南京龙源环保有限公司 | A kind of dry-wet-coupled integrated fume disappears bletilla dust-extraction unit |
| CN109364730A (en) * | 2018-12-17 | 2019-02-22 | 新疆天富集团有限责任公司 | A kind of full working scope wet desulphurization tail gas receipts water eliminating white smoke system and method |
| CN110090525A (en) * | 2019-06-13 | 2019-08-06 | 河南迪诺环保科技股份有限公司 | A kind of boiler smoke multi-stage heat exchanger takes off white device |
| CN113832265A (en) * | 2021-08-06 | 2021-12-24 | 中冶南方工程技术有限公司 | Blast furnace quenching slag steam whitening technology and device |
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