CN205182502U - Wet flue gas desulfurization tower with degree of depth dehumidification function - Google Patents

Wet flue gas desulfurization tower with degree of depth dehumidification function Download PDF

Info

Publication number
CN205182502U
CN205182502U CN201521042640.5U CN201521042640U CN205182502U CN 205182502 U CN205182502 U CN 205182502U CN 201521042640 U CN201521042640 U CN 201521042640U CN 205182502 U CN205182502 U CN 205182502U
Authority
CN
China
Prior art keywords
flue gas
working medium
desulfurizing tower
dehumidifying
liquid
Prior art date
Application number
CN201521042640.5U
Other languages
Chinese (zh)
Inventor
董勇
吕扬
崔琳
Original Assignee
山东大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 山东大学 filed Critical 山东大学
Priority to CN201521042640.5U priority Critical patent/CN205182502U/en
Application granted granted Critical
Publication of CN205182502U publication Critical patent/CN205182502U/en

Links

Abstract

The utility model discloses a wet flue gas desulfurization tower with degree of depth dehumidification function is equipped with the desulfurization in proper order and sprays layer, defroster and dehumidifier from the middle part to upper portion in the desulfurizing tower, the dehumidifier including the dehumidification nozzle with locate dehumidification nozzle below connect the liquid device. The beneficial effects of the utility model are that: wet flue gas desulfurization tower integrateed desulfurization, defogging, dehumidification function, the flue gas that the desulfurizing tower discharged no longer is hygrometry 100%'s the wet flue gas of saturation, but the adjustable controllable unsaturated wet flue gas of hygrometry, the flue gas dew point temperature reduces, and the temperature risees, and the super -heated rate improves, and fundamentally has avoided the flue gas dewfall and has formed " white cigarette " chimney rain " phenomenon, need not to adopt expensive material to carry on anticorrosively to the chimney, the system flow is simplified, and the functions of the equipments integrated level is high, and the plant area is few.

Description

A kind of wet flue gas desulfurization tower with degree of depth dehumidification function

Technical field

The utility model relates to Wet Flue Gas Desulfurization Technology field, is specifically related to one and is integrated with desulfurization, demist, degree of depth dehumidification function, can reduce smoke evacuation humidity, eliminates the wet flue gas desulfurization tower of " white cigarette " and " chimney rain ".

Background technology

Major part coal-burning power plant of China adopts wet fuel gas desulfurizing technology, comprise the techniques such as limestone-gypsum method, ammonia process and sea water desulfuration, utilize absorbing liquid spray washing flue gases in desulfurizing tower such as lime stone slurry, ammoniacal liquor or seawater respectively, in the process, the SO in flue gas 2be absorbed by liquid absorption, reach and remove SO 2object.

Desulfurizing tower is the core apparatus of wet desulfurizing process, general employing hollow-spraying-tower technique, desulfurizing tower is made up of three pull-up sulphur spraying layers and two-layer ridge type demister, in recent years along with the popularization of minimum discharge technology, wet flue gas desulfurization tower adopts technology such as increasing spraying layer, double tower Two-way Cycle or single tower Two-way Cycle to meet SO 2minimum discharge, but desulfurizing tower still remains the structure that 3 ~ 5 pull-up sulphur spraying layers add 2 ~ 3 layers of ridge type demister.Flue gas is after desulfurization spraying layer washing desulphurization, demister remove most of drop, formation temperature about 50 DEG C, the saturated wet flue gas of relative humidity 100% is through wet stack, because wet flue gas and air exist the temperature difference, steam in saturated wet flue gas can meet cold rapid condensation at chimney breast, form " white cigarette ", " chimney rain " phenomenon, and form acid liquid corrosion chimney structure in chimney inside, flue-gas temperature is low, directly results in plume rise diffusivity weak.

In order to solve the problem of " white cigarette " and " chimney rain ", coal-burning power plant once utilized rotary type heat exchanger (RGGH) or pipe heat exchanger (MGGH) to flue gas to reduce the relative humidity of wet flue gas in wet desulfuration tower downstream, operation result shows for many years, heat exchanger easily blocks, resistance is large, fault rate is high, system complex, is progressively eliminated by power plant, removes; For ensureing chimney safe operation, coal-burning power plant have employed titanium plate, fiberglass etc. and makes chimney lining to make chimney structure from corrosion, and cost is high.

At present, still do not have in engineer applied to avoid desulfurizing tower to discharge the technology of saturated wet flue gas, thus simplify desulfurizing tower upstream device, reduce chimney anticorrosion investment, avoid " white cigarette ", " chimney rain " phenomenon.

Utility model content

The utility model discloses a kind of wet flue gas desulfurization tower with degree of depth dehumidification function and dehumidification process, this utility model can stop the shortcoming that desulfurizing tower discharges saturated wet flue gas, reduce desulfurizing tower smoke evacuation relative humidity, reduce flue gas dew point, avoid " chimney rain " and " white cigarette " phenomenon, improve smog discharge temperature, strengthening flue gas diffusivity, making chimney anticorrosion without the need to adopting expensive material to carry out.

In order to reach above-mentioned purpose, the utility model adopts following technical scheme:

A kind of wet flue gas desulfurization tower with degree of depth dehumidification function, in desulfurizing tower, from middle part to top, be provided with desulfurization spraying layer, demister and dehumidifier successively, dehumidifier comprise for provide setting concentration dehumidifying working medium dehumidifying nozzle and be located at dehumidifying nozzle below connect liquid device.Coal-fired flue-gas enters desulfurizing tower by gas approach, after desulfurization spraying layer washing desulphurization, demister remove most of drop, the saturated wet flue gas forming relative humidity 100% moves up and enters dehumidifier, dehumidifying nozzle spray dehumidifying working medium, major part steam moves to also heat release in dehumidifying working medium, formation unsaturated wet flue gas discharge desulfurizing tower after the water capacity reduction of flue gas, temperature rising, relative humidity reduce.In the dehumidifying working medium of the dehumidifying working medium entrance input setting concentration of dehumidifier, rare working medium is formed after dehumidifying nozzle spray-absorption steam, connecing gathering in liquid device and discharged by the rare sender property outlet bottom dehumidifier, the spray flux of dehumidifying working medium adjusts according to the smoke evacuation humidity designing requirement of desulfurizing tower exhanst gas outlet.

Further, assemble for convenience of rare working medium, described in connect liquid device be funnel-form, plate-like or bowl-shape.

Further, described dehumidifying nozzle is horizontally set on the inside top of described dehumidifier in many row's multiple rows.

Further, described dehumidifying working medium is the aqueous solution of calcium chloride, lithium chloride or lithium bromide or the mixed solution of wherein two kinds or three.

Further, the concentration of described dehumidifying working medium is 40% ~ 50%, and the vapour pressure of dehumidifying working medium is lower than steam partial pressure in flue gas.

Further, be provided with filler in the below of described dehumidifying nozzle, increase mass transfer area, reduce equipment volume, improve effect on moisture extraction.

Further, described in connect liquid device and be connected with working medium pond, be provided with clarifier, rare working medium pond and Water-liquid separator successively connecing between liquid device and working medium pond, in Water-liquid separator, the vapour pressure of rare working medium is higher than the steam partial pressure of air in Water-liquid separator.

Further, described Water-liquid separator is flash vessel.

Further, between described Water-liquid separator and described working medium pond, cooler is provided with.

Operation principle of the present utility model is: coal-fired flue-gas enters desulfurizing tower by gas approach, after desulfurization spraying layer washing desulphurization, demister remove most of drop, form saturated wet flue gas to move up, dehumidifying nozzle spray dehumidifying working medium, major part steam moves to also heat release in dehumidifying working medium, the water capacity of flue gas reduces, dew-point temperature reduces, and temperature discharges desulfurizing tower after raising and forming unsaturated wet flue gas.

The beneficial effects of the utility model are:

1) be integrated with the wet flue gas desulfurization tower of desulfurization, demist, dehumidification function, the flue gas of desulfurizing tower discharge is no longer the saturated wet flue gas of relative humidity 100%, but the adjustable controlled unsaturated wet flue gas of relative humidity.

2) flue gas dew point temperature reduces, and temperature raises, and the degree of superheat improves, and fundamentally avoids smoke condensation and forms " white cigarette " " chimney rain " phenomenon, also just without the need to adopting expensive material to carry out anticorrosion to chimney.

3) system flow simplifies, and functions of the equipments integrated level is high, and plant area is few, without the need to follow-up flue gas Heating system.

Accompanying drawing explanation

Fig. 1 is structure principle chart of the present utility model;

Fig. 2 be in the utility model embodiment 3 structure chart;

Wherein: 1-gas approach, 2-desulfurization spraying layer, 3-demister, 4-dehumidifier, 5-exhanst gas outlet 6-dehumidifying working medium import 7-dehumidifying nozzle 8-connect liquid device 9-rare sender property outlet 10-clarifier, 11-rare working medium pond, 12-rare working medium pump, 13-Water-liquid separator, 14-cooler, 15-working medium pond, 16-absorption pump.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the utility model embodiment, clear, complete description is carried out to the technical scheme in the utility model embodiment.

Embodiment 1

A kind of wet flue gas desulfurization tower with degree of depth dehumidification function, desulfurizing tower entrance connects gas approach 1, top is exhanst gas outlet 5, from middle part to top, desulfurization spraying layer 2, demister 3 and dehumidifier 4 is provided with successively in desulfurizing tower, dehumidifier 4 comprises dehumidifying nozzle 7 and is located at and connects liquid device 8 below dehumidifying nozzle 7, dehumidifier top is provided with dehumidifying working medium import 6, and the import 6 of dehumidifying working medium connects dehumidifying nozzle 7, and the middle part connecing liquid device 8 connects rare sender property outlet 9.

Coal-fired flue-gas enters desulfurizing tower by gas approach 1, after desulfurization spraying layer 2 washing desulphurization, demister 3 remove most of drop, form saturated wet flue gas to move up and enter dehumidifier 4, in dehumidifier 4, major part steam moves to also heat release in dehumidifying working medium, and the water capacity of flue gas reduces, temperature raises, relative humidity discharges desulfurizing tower through exhanst gas outlet 5 after reducing.The dehumidifying working medium of the dehumidifying working medium entrance 6 input setting concentration of dehumidifier 4, rare working medium is formed after dehumidifying nozzle 7 spray-absorption steam, collect and discharged by the rare sender property outlet 9 bottom dehumidifier 4 connecing in liquid device 8, the spray flux of dehumidifying working medium adjusts according to the smoke evacuation humidity designing requirement of desulfurizing tower exhanst gas outlet.

Assemble for convenience of rare working medium, described in connect liquid device 8 in funnel-form, rare working medium, after connecing and assembling in liquid device 8, is discharged by rare sender property outlet 9.

Described dehumidifying working medium is the aqueous solution of calcium chloride, lithium chloride or lithium bromide or the mixed solution of wherein two kinds or three, and the concentration of described dehumidifying working medium is 40% ~ 50%.

Dehumidifying nozzle 7 adopts countercurrent spray mode.

Embodiment 2

The difference of the present embodiment and embodiment 1 is:

Be provided with filler in the below of described dehumidifying nozzle 7, increase mass transfer area, reduce equipment volume, improve dehumidification rate.

Embodiment 3

As shown in Figure 2, the described liquid device 8 that connects is connected with working medium pond 15, be provided with clarifier 10, rare working medium pond 11 and Water-liquid separator 13 successively connecing between liquid device 8 and working medium pond, in Water-liquid separator 13 (flash vessel), the vapour pressure of rare working medium is higher than the steam partial pressure of air in Water-liquid separator 13; Working medium pond 15 is located at the outside of desulfurizing tower, dehumidifying working medium in working medium pond 15 is input to dehumidifier 4 through absorption pump 16, rare working medium is formed after dehumidifying nozzle 7 spray-absorption steam, rare working medium flows into rare working medium pond 11 after purification utensil subsequently, be input to Water-liquid separator 11 through rare working medium pump 12 and realize being separated of dehumidifying working medium and moisture, the dehumidifying working medium after separation is sent into working medium pond and is again recycled after cooling.

The above is only preferred embodiment of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (9)

1. the wet flue gas desulfurization tower with degree of depth dehumidification function, it is characterized in that, in desulfurizing tower, from middle part to top, be provided with desulfurization spraying layer, demister and dehumidifier successively, dehumidifier comprise for provide setting concentration dehumidifying working medium dehumidifying nozzle and be located at dehumidifying nozzle below connect liquid device.
2. fume desulfurizing tower as claimed in claim 1, is characterized in that, described dehumidifying nozzle is horizontally set on the inside top of described dehumidifier in many row's multiple rows.
3. fume desulfurizing tower as claimed in claim 1 or 2, is characterized in that, described dehumidifying working medium is the aqueous solution of calcium chloride, lithium chloride or lithium bromide or the mixed solution of wherein two kinds or three.
4. fume desulfurizing tower as claimed in claim 1 or 2, it is characterized in that, the concentration of described dehumidifying working medium is 40% ~ 50%, and the vapour pressure of dehumidifying working medium is lower than steam partial pressure in flue gas.
5. fume desulfurizing tower as claimed in claim 1 or 2, it is characterized in that, the described liquid device that connects is connected with working medium pond, be provided with clarifier, rare working medium pond and Water-liquid separator successively connecing between liquid device and working medium pond, in Water-liquid separator, the vapour pressure of rare working medium is higher than the steam partial pressure of air in Water-liquid separator.
6. fume desulfurizing tower as claimed in claim 5, it is characterized in that, described Water-liquid separator is flash vessel.
7. fume desulfurizing tower as claimed in claim 1 or 2, is characterized in that, be provided with filler in the below of described dehumidifying nozzle.
8. fume desulfurizing tower as claimed in claim 5, is characterized in that, between described Water-liquid separator and described working medium pond, be provided with cooler.
9. the fume desulfurizing tower as described in claim 1 or 2 or 6, is characterized in that, described in connect liquid device be funnel-form, plate-like or bowl-shape.
CN201521042640.5U 2015-12-14 2015-12-14 Wet flue gas desulfurization tower with degree of depth dehumidification function CN205182502U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201521042640.5U CN205182502U (en) 2015-12-14 2015-12-14 Wet flue gas desulfurization tower with degree of depth dehumidification function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201521042640.5U CN205182502U (en) 2015-12-14 2015-12-14 Wet flue gas desulfurization tower with degree of depth dehumidification function

Publications (1)

Publication Number Publication Date
CN205182502U true CN205182502U (en) 2016-04-27

Family

ID=55775541

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201521042640.5U CN205182502U (en) 2015-12-14 2015-12-14 Wet flue gas desulfurization tower with degree of depth dehumidification function

Country Status (1)

Country Link
CN (1) CN205182502U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105413430A (en) * 2015-12-14 2016-03-23 山东大学 Wet flue gas desulfurization tower with deep dehumidification function and dehumidification process
CN106268198A (en) * 2016-07-27 2017-01-04 山东大学 A kind of desulfurization fume dehumidifying and water reclamation system and method
CN106500122A (en) * 2016-09-08 2017-03-15 中国科学院工程热物理研究所 A kind of elimination coal fired power plant chimney white haze is while the system and method for Mist heat recovering and water
CN110345503A (en) * 2019-08-23 2019-10-18 山东保蓝环保工程有限公司 The flue gas of chemical plant exhaust chimney takes off white equipment and system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105413430A (en) * 2015-12-14 2016-03-23 山东大学 Wet flue gas desulfurization tower with deep dehumidification function and dehumidification process
CN106268198A (en) * 2016-07-27 2017-01-04 山东大学 A kind of desulfurization fume dehumidifying and water reclamation system and method
CN106500122A (en) * 2016-09-08 2017-03-15 中国科学院工程热物理研究所 A kind of elimination coal fired power plant chimney white haze is while the system and method for Mist heat recovering and water
CN106500122B (en) * 2016-09-08 2019-02-15 中国科学院工程热物理研究所 A kind of system and method for eliminating coal fired power plant chimney white haze while Mist heat recovering and water
CN110345503A (en) * 2019-08-23 2019-10-18 山东保蓝环保工程有限公司 The flue gas of chemical plant exhaust chimney takes off white equipment and system

Similar Documents

Publication Publication Date Title
CN200998639Y (en) Concentrated crystallization and absorbed oxidation combined type ammonia process desulfuration tower
CN101939080B (en) Installation and method for cleaning flue gases
WO2012051879A1 (en) Method and apparatus for capturing carbon dioxide in flue gas with activated sodium carbonate
CN202460402U (en) Lime kiln gas purification tower
CN105107365B (en) Flue gas composite phase-change dust-removing and desulfurization process and device
CN204923035U (en) Processing system is synthesized to coal fired boiler's flue gas
CN102850092B (en) Technology for producing ammonium sulfate fertilizer through desulfurizing smoke by ammonia process, and apparatus thereof
CN104437066B (en) The condensation inversion of phases wet desulfurization system of cooperation-removal flue gas flue dust and method thereof
US4533522A (en) Apparatus for the desulfurization of flue gases
KR20140031144A (en) Desulphurization and cooling of process gas
CN202683052U (en) Front semi-dry gas desulfurization system
CN100395006C (en) Void tower type ammonia desulfurizing process and apparatus
CN106477794B (en) The System and method for of desulfurization wastewater concentration and flue gas drying integrated treatment
CN201179415Y (en) Flue gas desulfurization purification column
CN102151470B (en) Flue gas desulfurization method and device
CN106512637B (en) A kind of device and method for eliminating white cigarette
CN105180187A (en) Zero-water-consumption zero-wastewater-draining desulfurization system and application
CN201026440Y (en) Absorption, oxidation, concentration combined desulfurizing tower
CN102294171B (en) Flue gas purifying system
CN203017796U (en) Dehumidifying defogging device of moisture in condensed smoke
CN205760173U (en) A kind of dust-removal and desulfurizing spray column
CN103868087B (en) A kind of collaborative enhancing PM2.5The method of elimination and fume afterheat deep exploitation and device
CN201362705Y (en) Natural gas water removal and heavy hydrocarbon removal device
JP2011177615A (en) Gypsum dewatering device for desulfurization facility
CN105879542A (en) Power plant desulfurization wastewater bypass treatment system and method and flue gas treatment system and method

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model