CN106582237A - Incineration flue gas purification and cyclic treatment system - Google Patents
Incineration flue gas purification and cyclic treatment system Download PDFInfo
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- CN106582237A CN106582237A CN201611156383.7A CN201611156383A CN106582237A CN 106582237 A CN106582237 A CN 106582237A CN 201611156383 A CN201611156383 A CN 201611156383A CN 106582237 A CN106582237 A CN 106582237A
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- water
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- flue gas
- washing
- alkali cleaning
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2047—Hydrofluoric acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
- B01D2258/0291—Flue gases from waste incineration plants
Abstract
The invention discloses an incineration flue gas purification and cyclic treatment system which comprises a washing device, an alkali absorption device, a water vapor deduction device and a control device. The incineration flue gas purification and cyclic treatment system fully utilizes the water solubility and alkali liquor reaction characteristics of incineration flue gas, a PH value of spraying liquid is monitored and acid-base neutralization are performed through spraying, absorption and alkali liquor reaction, solid-liquid separation processing is achieved without an overflow device consuming energy, internal digestion and utilization of flue gas energy, qualified flue gas discharge, harmful gas absorption treatment, crystal salt recycle and the like are achieved, and the risk that crystals block a filler and the system maintenance cost are reduced. A continuous, stable and effective absorption process is achieved through automatic whole-process control and monitoring and automatic regulation of an absorption liquid pH value, accordingly a new way is opened for energy saving, environmental protection and efficient utilization in the incineration flue gas treatment process, and the incineration flue gas purification and cyclic treatment system has the advantages of being clean, capable of saving energy, intelligent, automatic, remarkable in effect and the like.
Description
Technical field
The present invention relates to incineration flue gas processing technology field, in particular it relates to a kind of decontamination cycle of incineration flue gas is processed
System.
Background technology
Waste incineration is a kind of more ancient traditional waste disposal method, after being processed with burning method due to rubbish, minimizing
Effect is significant, higher than 850 DEG C, volume ratio can reduce 50-80% originally after burning, categorised collection for general in-furnace temperature control
Combustible garbage can even reduce 90% Jing after burning disposal, save land used effect substantially, can also eliminate various pathogen, will have
Malicious harmful substance is converted into harmless object, therefore waste incineration method has become one of main method for the treatment of of urban garbage.Modern rubbish
Rubbish incinerator is all furnished with good smoke and dust purifier, mitigates and even essentially eliminates the pollution to air.But incinerator
The handling process of gas can also produce new polluted absorbing liquid thing while original rubbish is eliminated.Traditional processing method, at place
Generally there are problems that poor effect, high energy consumption, pollution hidden trouble are big, automaticity is low, improvement is halfway in reason absorbing liquid.
The content of the invention
It is an object of the invention to provide a kind of decontamination cycle processing system of incineration flue gas, fully absorbs having in flue gas
Evil composition, realizes the lasting, stable, effective of absorption technique, reducing energy consumption, cost-effective, and realizes satisfactory flue gas
Clean emission, to solve the problems, such as above-mentioned background technology in propose.
For achieving the above object, the present invention provides following technical scheme：
A kind of decontamination cycle processing system of incineration flue gas, including water washing device, Alkali absorption device, steam subduction device and
Control device,
The water washing device includes water scrubber, washing pool, water washing cycles pump, spray thrower, and the water scrubber is provided with one
Determine the multistage packing layer of thickness, spray thrower is equipped with each packing layer, flue gas is by the air inlet below described filler layer
Mouth enters water scrubber, and under pressure from filler lower section, Jing fillers rise, water washing cycles pump taking out from washing pool bottom by water
Mouth of a river Jing pipelines deliver to spray thrower, and the eminence Jing packing layer of water Jing water scrubbers flows downward, by the micronic dust in pending tail gas and
The gas ingredients for being partially soluble in water absorb, and waste water mouths of the Jing located at water scrubber bottom flows back to washing pool, washes Jing after washing process
Gas is discharged by the air vent located at the water scrubber top；
The Alkali absorption device includes that caustic wash tower, alkali cleaning pond, alkali cleaning circulating pump, spray thrower, alkali liquor storage tank and alkali liquor are supplemented
Pump, the caustic wash tower is provided with certain thickness multistage packing layer, and spray thrower is equipped with each packing layer, and washing gas passes through
Air inlet below described filler layer enters caustic wash tower, and under pressure from filler lower section, Jing fillers rise, and alkali cleaning is followed
Alkali liquor is delivered to spray thrower by ring pump from the liquid pumping hole Jing pipelines in alkali cleaning bottom of pond portion, and the eminence Jing packing layer of alkali liquor Jing caustic wash towers is downward
Sour gas reaction in flowing, with washing gas generates inorganic salt, and waste liquid ports of the Jing located at caustic wash tower bottom flows back to alkali cleaning pond, Jing
Alkali cleaning gas after alkali cleaning is processed is discharged by the air vent located at the caustic wash tower top；
The steam subduction device includes cold medium compressor, and the cold medium compressor is provided with cold end, hot junction, and the cold end sets
There is cold end air inlet, hot junction is provided with hot junction air vent, and the cold end air inlet is connected with the air vent of the caustic wash tower；
The control device include control circuit, switch, the control circuit with switch be connected, it is described switch respectively with water
Wash circulating pump, alkali cleaning circulating pump, cold medium compressor electrical connection.
Here, under tap water is uninterruptedly drenched from water scrubber eminence Jing filler by water washing device, in the flue gas that will rise
Water solublity harmful gass dissolving, micronic dust absorb；By alkaline cleaner make alkali liquor with washing gas in sulfur dioxide, hydrogen chloride,
The reaction of the compositions such as fluohydric acid gas, nitrogen oxides generates inorganic salt；The Main Function of cold medium compressor is to reduce moisture content in alkali cleaning gas,
Alkali cleaning gas enters cold medium compressor except aqueous vapor and heats up, so as to its moisture content is reduced in qualified critical field, by heat
End air vent is discharged；Work is coordinated to control whole system by control system, control circuit includes being built-in with control journey
The single-chip microcomputer of sequence, so as to reach automatization, unattended Based Intelligent Control effect.
Because fume emission has temperature requirement, temperature is too low to be unfavorable for discharge, it is preferred that the decontamination cycle of the incineration flue gas
Processing system includes heat exchange heat sink, and the heat exchange heat sink includes finned heat exchanger, and the finned heat exchanger includes cigarette
Gas import, exhanst gas outlet, except aqueous vapor import, except moisture outlet, the exhanst gas outlet is connected with water scrubber air inlet by pipeline,
It is described except aqueous vapor import is connected by pipeline with the hot junction air vent.The incineration flue gas Jing gas approach of high temperature is changed into fin
Hot device, with the low temperature of the hot junction air vent discharge from cold medium compressor except aqueous vapor is fully exchanged heat, lifts the temperature except aqueous vapor
Degree is beneficial to discharge, while reduce high-temperature flue-gas absorbing in order to rear stage harmful substance.
For prevent heating after except aqueous vapor can not still meet the probability of exhaust temperature requirement, it is preferred that it is described to change
Hot heat sink includes vapor heat exchanger, and the vapor heat exchanger is provided with steam channel, exchanging air entrance, exchanging air outlet, institute
Exchanging air entrance is stated with finned heat exchanger except moisture outlet is connected.Heated by steam, further to improve Jing finned heat exchangers
The temperature of exchanging air after intensification, realizes the qualified discharge of gas after purification, and steam condensate (SC) then enters boiler water reuse.
Preferably, the washing pool include washing between A, washing between I between B and overflow, between the overflow I located at washing between A,
Between washing between B, the pump mouth I bottom located between overflow, the waste water mouth leads to and divide on the pipeline of B between A, washing between washing
It is not provided with waste water switch valve A, waste water switch valve B.Preferably, the control circuit respectively with waste water switch valve A, waste water switch valve
B connects, control waste water switch valve A, waste water switch valve B rotations opening and closing.Flue gas after washing, the sulfur dioxide, chlorination in flue gas
The part such as hydrogen, fluohydric acid gas, nitrogen oxides is washed with water liquid absorption, water lotion acidification, while also having water body absorption in water lotion
The solid matter such as micronic dust, after B standing separation between A between washing and washing, supernatant overflow is flowed into I between overflow, is continued in water
Wash cyclic absorption purifying smoke in the presence of circulating pump.After B one solid sediments are more between A, washing between washing, it is switched to another
Water lotion is processed between one pond, the washing pool lower floor solid sediment is then directly reclaimed and removes process, is so staggeredly carried out repeatedly,
Realize the continuous operation of water wash system.
Preferably, the alkali cleaning pond includes between alkali cleaning between A, alkali cleaning II between B and overflow that II located between alkali cleaning between the overflow
Between A, alkali cleaning between B, the liquid pumping hole II bottom located between overflow, the waste liquid port leads to the pipeline of B between A, alkali cleaning between alkali cleaning
On be respectively equipped with waste liquid switch valve A, waste liquid switch valve B.Preferably, the control circuit is opened respectively with waste liquid switch valve A, waste liquid
Close valve B connections, control waste liquid switch valve A, waste liquid switch valve B rotations opening and closing.Gas is washed Jing after alkali cleaning, by the alkali of such as lime water
Liquid spray to absorb flue gas in sour gas, generate inorganic salt, inorganic salt main component is calcium sulfite etc., recyclable profit
With in alkali cleaning pond after solid standing separation, supernatant overflow is flowed into II between overflow, continues to be circulated in the presence of alkali cleaning circulating pump
Absorption cleaning washes gas.After B one solid sediment is more between A, alkali cleaning between alkali cleaning, it is switched between another alkali pond and processes alkali cleaning
Liquid, solid sediment is directly reclaimed and removes process, is so staggeredly carried out repeatedly, realizes the continuous operation of system.
Because tap water absorbs acidic flue gas in water washing device, acidity is too high to be unfavorable for gas washing air-breathing, it is preferred that described to overflow
It is provided with neutralization pump between stream between II and overflow between I, the neutralization pump unidirectionally pumps into alkali liquor between overflow II between overflow I.It is preferred that
, PH detectors are provided between the overflow in I, the PH detectors, neutralization pump are connected respectively with control circuit, PH detectors
Detect in I between overflow the pH value of water body and send data to control circuit, when control circuit detects pH value less than setting value
When, to be opened by control circuit control neutralization pump, alkali liquor enters I neutralization water body between overflow, to realize the continuous service of system.
Preferably, the alkali cleaning bottom of pond portion is provided with the pipeline being connected with air-blaster, and the air-blaster is by pipe
On road and pipeline arrange valve to air is blasted between alkali cleaning between A, alkali cleaning in B, using in the dioxygen oxidation crystalline salt in air
Calcium sulfite and a small amount of nitrite etc., be allowed to reaction and generate calcium sulfate (i.e. gypsum product) etc., Gypsum Fibrosum recoverable.
Preferably, the water washing device is provided with the water supplement port being connected with outside water supply, and the water supplement port is located at water washing cycles
Pump leads on the pipeline of spray thrower, and the water supplement port is provided with the water compensating valve of control moisturizing.
Preferably, be provided with liquid level sensor I between the overflow in I, the control circuit respectively with liquid level sensor I, mend
Water valve connects, and between the overflow under water scrubber I liquid level is monitored and is sent by liquid level sensor I and to control circuit and believed
Number, by control circuit control water compensating valve opening and closing, when I liquid level is low between overflow, water compensating valve is opened；When I liquid level is high between overflow, moisturizing
Valve is closed.
Preferably, be provided with liquid level sensor II between the overflow in II, the control circuit respectively with liquid level sensor II,
Caustic make up pump connects, and between the overflow under caustic wash tower II liquid level is monitored by liquid level sensor II and to control circuit
Sending signal, by control circuit control caustic make up pump opening and closing, when 2nd liquid level is low between overflow, caustic make up pump is opened；Overflow
Between 2nd liquid level it is high when, caustic make up pump close.
Compared with prior art, the invention has the beneficial effects as follows：The decontamination cycle of incineration flue gas of the present invention is processed
System makes full use of the water solublity of incineration flue gas and alkaline reaction characteristic, by spray-absorption and alkaline reaction, to spray liquid
PH value is monitored and acid-base neutralization, realizes that solid-liquid separation is processed by the overflow mechanism without the need for energy consumption, realizes in gas energy
The qualified discharge of portion's digestibility and utilization, flue gas, harmful gass absorption process, crystalline salt recycling etc., reduce crystal blocking filler
Risk and system maintenance cost；Automatically controlled by full-range, the Acidity of Aikalinity of absorbing liquid is monitored and automatically adjusted, realize inhaling
Skill of knocking off it is lasting, stable, effective, so as to for energy-conserving and environment-protective in incineration flue gas processing procedure, efficient utilization open one it is new
Approach, with clean energy-saving, intelligence automatically, the advantage such as achieve noticeable achievement
Description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the block diagram of the control device of the embodiment of the present invention；
Wherein：1. water scrubber, 2. water compensating valve, 3. water washing cycles pump, 4. spray thrower, 5. packing layer, 6. caustic wash tower, 7. air
Aerator, 8. alkali cleaning circulating pump, 9. alkali liquor storage tank, 10 caustic make up pump, 11. cold medium compressors, 12. cold ends, 13. hot junctions, 14.
Finned heat exchanger, 15. vapor heat exchangers, A between 16. washings, B between 17. washings, I between 18. overflows, 19. waste water switch valve A, 20.
Waste water switch valve B, A between 21. alkali cleanings, B between 22. alkali cleanings, II between 23. overflows, 24. waste liquid switch valve A, 25. waste liquid switch valve B,
In 26. and pump.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
With reference to shown in Fig. 1, Fig. 2, a kind of decontamination cycle processing system of incineration flue gas, including water washing device, Alkali absorption dress
Put, steam reduces device and control device,
The water washing device includes water scrubber 1, washing pool, water washing cycles pump 3, spray thrower 4, and the water scrubber 1 is provided with tool
There is certain thickness multistage packing layer 5, spray thrower 4 is equipped with each packing layer 5, flue gas is by under described filler layer 5
The air inlet of side enters water scrubber 1, and under pressure from filler lower section, Jing fillers rise, and water washing cycles pump 3 is by water from washing
The pump mouth Jing pipelines in bottom of pond portion deliver to spray thrower 4, and the eminence Jing packing layer 5 of water Jing water scrubbers 1 flows downward, by pending tail
Micronic dust in gas and it is partially soluble in the gas ingredients of water and absorbs, waste water mouths of the Jing located at the bottom of water scrubber 1 flows back to washing pool, Jing water
Wash after processing and wash gas by the air vent discharge located at the top of the water scrubber 1；
The Alkali absorption device includes caustic wash tower 7, alkali cleaning pond, alkali cleaning circulating pump 8, spray thrower 4, alkali liquor storage tank 9 and alkali liquor
Make-up pump 10, the caustic wash tower 7 is provided with certain thickness multistage packing layer 5, and spray thrower 4 is equipped with each packing layer 5,
Washing gas enters caustic wash tower 7 by the air inlet located at the lower section of described filler layer 5, under pressure from filler lower section Jing fillers
Rise, alkali liquor is delivered to spray thrower 4, the height of alkali liquor Jing caustic wash towers 7 by alkali cleaning circulating pump 8 from the liquid pumping hole Jing pipelines in alkali cleaning bottom of pond portion
Place Jing packing layers 5 flow downward, and with the sour gas reaction in washing gas inorganic salt is generated, and Jing is located at the useless of the bottom of caustic wash tower 7
Liquid mouth flows back to alkali cleaning pond, and the alkali cleaning gas Jing after alkali cleaning is processed is discharged by the air vent located at the top of the caustic wash tower 7；
The steam subduction device includes cold medium compressor 11, and the cold medium compressor 11 is provided with cold end 12, hot junction 13, institute
State cold end 12 and be provided with cold end air inlet, hot junction 13 is provided with hot junction air vent, the aerofluxuss of the cold end air inlet and the caustic wash tower 7
Mouth connection；
The control device include control circuit, switch, the control circuit with switch be connected, it is described switch respectively with water
Wash circulating pump 3, alkali cleaning circulating pump 8, cold medium compressor 11 to electrically connect.
Here, under tap water is uninterruptedly drenched from the eminence Jing filler of water scrubber 1 by water washing device, in the flue gas that will rise
Water solublity harmful gass dissolving, micronic dust absorb；By alkaline cleaner make alkali liquor with washing gas in sulfur dioxide, hydrogen chloride,
The reaction of the compositions such as fluohydric acid gas, nitrogen oxides generates inorganic salt；The Main Function of cold medium compressor 11 is to reduce aqueous in alkali cleaning gas
Rate, alkali cleaning gas enters cold medium compressor 11 except aqueous vapor and heats up, and so as to its moisture content is reduced in qualified critical field, leads to
Cross hot junction air vent to discharge；Work is coordinated to control whole system by control system, control circuit includes being built-in with control
The single-chip microcomputer of processing procedure sequence, so as to reach automatization, unattended Based Intelligent Control effect.
Because fume emission has temperature requirement, temperature is too low to be unfavorable for discharge, the decontamination cycle processing system of the incineration flue gas
System includes the heat sink that exchanges heat, and the heat exchange heat sink includes finned heat exchanger 14, and the finned heat exchanger 14 includes flue gas
Import, exhanst gas outlet, except aqueous vapor import, except moisture outlet, the exhanst gas outlet is connected with the air inlet of water scrubber 1 by pipeline,
It is described except aqueous vapor import is connected by pipeline with the hot junction air vent.The incineration flue gas Jing gas approach of high temperature is changed into fin
Hot device 14, with the low temperature of the hot junction air vent discharge from cold medium compressor 11 except aqueous vapor is fully exchanged heat, is lifted and removes aqueous vapor
Temperature be beneficial to discharge, while reduce high-temperature flue-gas absorb in order to rear stage harmful substance.
The probability of exhaust temperature requirement can not be still met except aqueous vapor, the heat exchange cooling dress after to prevent heating
Put including vapor heat exchanger 15, the vapor heat exchanger 15 is provided with steam channel, exchanging air entrance, exchanging air outlet, described to change
Hot gas inlet is with finned heat exchanger 14 except moisture outlet is connected.Heated by steam, further to improve Jing finned heat exchangers 14
The temperature of exchanging air after intensification, realizes the qualified discharge of gas after purification, and steam condensate (SC) then enters boiler water reuse.
The washing pool include washing between A16, washing between I 18 between B17 and overflow, between the overflow I 18 located at washing between
Between A16, washing between B17, the pump mouth I 18 bottoms located between overflow, the waste water mouth leads between washing between A16, washing
Waste water switch valve A19, waste water switch valve B20 are respectively equipped with the pipeline of B17.The control circuit respectively with waste water switch valve
A19, waste water switch valve B20 connect, control waste water switch valve A19, waste water switch valve B20 rotations opening and closing.Flue gas after washing, cigarette
The part such as sulfur dioxide, hydrogen chloride, fluohydric acid gas, nitrogen oxides in gas is washed with water liquid absorption, water lotion acidification, while washing
Also the solid matters such as the micronic dust of water body absorption are had in liquid, solid-liquid standing separation is passed through respectively by B17 between A16 between washing and washing
Effect, makes supernatant to I 18 overflow between overflow, the circulated sprinkling in the presence of water washing cycles pump 3, continuous gas washing air-breathing, under
The solid recycling of layer standing separation.
The alkali cleaning pond includes between alkali cleaning between A21, alkali cleaning II 23 between B22 and overflow that II 23 are located at alkali cleaning between the overflow
Between between A21, alkali cleaning between B22, the liquid pumping hole II 23 bottoms located between overflow, the waste liquid port leads to A21, alkali cleaning between alkali cleaning
Between B22 pipeline on be respectively equipped with waste liquid switch valve A24, waste liquid switch valve B25.The control circuit respectively with waste liquid switch valve
A24, waste liquid switch valve B25 connect, control waste liquid switch valve A24, waste liquid switch valve B25 rotations opening and closing.Washing gas Jing after alkali cleaning,
Sour gas in being sprayed to absorb flue gas by the alkali liquor of such as lime water, generates inorganic salt, and inorganic salt main component is sulfurous
Sour calcium etc., recoverable, in alkali cleaning pond after solid standing separation, supernatant overflow is flowed into II 23 between overflow, is continued in alkali cleaning
Cyclic absorption purified water gas washing in the presence of circulating pump 8.After B22 one solid sediment is more between A21, alkali cleaning between alkali cleaning, cut
Change to and alkali wash water is processed between another alkali pond, solid sediment process is reclaimed, so staggeredly carry out repeatedly, realize the continuous fortune of system
OK.
Because tap water absorbs acidic flue gas in water washing device, acidity is too high to be unfavorable for gas washing air-breathing, II between the overflow
Neutralization pump 26 is provided between 23 and overflow between I 18, the neutralization pump 26 unidirectionally pumps into alkali between overflow II 23 between overflow I 18
Liquid.PH detectors are provided with I 18 between the overflow, the PH detectors, neutralization pump 26 are connected respectively with control circuit, PH inspections
Survey instrument to detect in I 18 between overflow the pH value of water body and send data to control circuit, be less than when control circuit detects pH value
During setting value, opened by control circuit control neutralization pump 26, alkali liquor is entered between overflow in I 18 and water body, to realize holding for system
Reforwarding row.
The alkali cleaning bottom of pond portion is provided with the pipeline being connected with air-blaster 7, and the air-blaster 7 is by pipeline and pipe
On road arrange valve to air is blasted between alkali cleaning between A21, alkali cleaning in B22, using in the dioxygen oxidation crystalline salt in air
Calcium sulfite and a small amount of nitrite etc., are allowed to reaction and generate calcium sulfate (i.e. gypsum product) etc., Gypsum Fibrosum recoverable.
The water washing device is provided with the water supplement port being connected with outside water supply, and the water supplement port leads to located at water washing cycles pump 3
On the pipeline of spray thrower 4, the water supplement port is provided with the water compensating valve 2 of control moisturizing.
Be provided with liquid level sensor I between the overflow in I 18, the control circuit respectively with liquid level sensor I, water compensating valve 2
Connection, is monitored and to control circuit sending signal by liquid level sensor I between the overflow under water scrubber 1 I 18 liquid level,
It is opened and closed by control circuit control water compensating valve 2, when I 18 liquid levels are low between overflow, water compensating valve 2 is opened；When I 18 liquid levels are high between overflow,
Water compensating valve 2 is closed.
Be provided with liquid level sensor II between the overflow in II 23, the control circuit respectively with liquid level sensor II, alkali liquor
Make-up pump 10 connects, and between the overflow under caustic wash tower 7 II 23 liquid level is monitored by liquid level sensor II and to control electricity
Road sending signal, is opened and closed by control circuit control caustic make up pump 10, and when II 23 liquid levels are low between overflow, caustic make up pump 10 is opened
Open；When II 23 liquid levels are high between overflow, caustic make up pump 10 is closed.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding can carry out various changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention be defined by the appended.
Claims (10)
1. the decontamination cycle processing system of a kind of incineration flue gas, it is characterised in that including water washing device, Alkali absorption device, steam
Subduction device and control device,
The water washing device includes water scrubber, washing pool, water washing cycles pump, spray thrower, and the water scrubber is provided with certain thick
The multistage packing layer of degree, is equipped with spray thrower on each packing layer, flue gas is entered by the air inlet below described filler layer
Enter water scrubber, under pressure Jing fillers rise from filler lower section, water washing cycles pump is by water from the pump mouth of washing pool bottom
Jing pipelines deliver to spray thrower, and water flows downward from the eminence Jing packing layer of water scrubber, by the micronic dust in pending tail gas and part
The gas ingredients for being dissolved in water absorb, and waste water mouths of the Jing located at water scrubber bottom flows back to washing pool, gas is washed Jing after washing process and is led to
Cross the air vent located at the water scrubber top to discharge；
The Alkali absorption device includes caustic wash tower, alkali cleaning pond, alkali cleaning circulating pump, spray thrower, alkali liquor storage tank and caustic make up pump, institute
State caustic wash tower to be provided with certain thickness multistage packing layer, spray thrower is equipped with each packing layer, washing gas is by being located at
Air inlet below described filler layer enters caustic wash tower, and under pressure from filler lower section, Jing fillers rise, alkali cleaning circulating pump
Alkali liquor is delivered to into spray thrower, eminence Jing filler sulfate layer flows downhill of the alkali liquor from caustic wash tower from the liquid pumping hole Jing pipelines in alkali cleaning bottom of pond portion
It is dynamic, inorganic salt is generated with the sour gas reaction in washing gas, waste liquid ports of the Jing located at caustic wash tower bottom flows back to alkali cleaning pond, Jing alkali
The alkali cleaning gas washed after processing is discharged by the air vent located at the caustic wash tower top；
The steam subduction device includes cold medium compressor, and the cold medium compressor is provided with cold end, hot junction, and the cold end is provided with cold
End air inlet, hot junction is provided with hot junction air vent, and the cold end air inlet is connected with the air vent of the caustic wash tower；
The control device includes control circuit, switch, and the control circuit is connected with switch, and the switch is followed respectively with washing
Ring pump, alkali cleaning circulating pump, cold medium compressor electrical connection.
2. the decontamination cycle processing system of incineration flue gas according to claim 1, it is characterised in that the incineration flue gas
Decontamination cycle processing system includes heat exchange heat sink, and the heat exchange heat sink includes finned heat exchanger, the fin heat exchange
Including gas approach, exhanst gas outlet, except aqueous vapor import, except moisture outlet, the exhanst gas outlet passes through device with water scrubber air inlet
Pipeline connects, described except aqueous vapor import is connected by pipeline with the hot junction air vent.
3. the decontamination cycle processing system of incineration flue gas according to claim 2, it is characterised in that the heat exchange cooling dress
Put including vapor heat exchanger, the vapor heat exchanger is provided with steam channel, exchanging air entrance, exchanging air outlet, the exchanging air
Entrance is with finned heat exchanger except moisture outlet is connected.
4. the decontamination cycle processing system of incineration flue gas according to claim 3, it is characterised in that the washing pool includes
Between A between washing, washing I between B and overflow, I located between washing between A, washing between B between the overflow, and the pump mouth is located at overflowing
I bottom between stream, the waste water mouth to lead to and be respectively equipped with waste water switch valve A, waste water switch valve on the pipeline of B between A, washing between washing
B。
5. the decontamination cycle processing system of incineration flue gas according to claim 4, it is characterised in that the control circuit point
It is not connected with waste water switch valve A, waste water switch valve B, control waste water switch valve A, waste water switch valve B rotations opening and closing.
6. the decontamination cycle processing system of the incineration flue gas according to claim 3 or 4, it is characterised in that the alkali cleaning pond
Including between alkali cleaning between A, alkali cleaning II between B and overflow, II located between alkali cleaning between A, alkali cleaning between B between the overflow, the liquid pumping hole
II bottom located between overflow, the waste liquid port is led to and be respectively equipped with the pipeline of B between A, alkali cleaning between alkali cleaning waste liquid switch valve A, gives up
Liquid switch valve B, the alkali cleaning bottom of pond portion is provided with the pipeline being connected with air-blaster, and the air-blaster is by pipeline and pipe
The valve arranged on road is to blasting air in B between A, alkali cleaning between alkali cleaning.
7. the decontamination cycle processing system of incineration flue gas according to claim 6, it is characterised in that the control circuit point
It is not connected with waste liquid switch valve A, waste liquid switch valve B, control waste liquid switch valve A, waste liquid switch valve B rotations opening and closing.
8. the decontamination cycle processing system of incineration flue gas according to claim 7, it is characterised in that between the overflow II with
Neutralization pump is provided between overflow between I, the neutralization pump between overflow II between overflow I unidirectionally pumps into alkali liquor, I between the overflow in
PH detectors are provided with, the PH detectors, neutralization pump are connected respectively with control circuit, and PH detectors are detected in I between overflow
The pH value of water body simultaneously sends data to control circuit, when control circuit detects pH value less than setting value, by control circuit control
System neutralization pump is opened, and alkali liquor enters I neutralization water body between overflow, to realize the continuous service of system.
9. the decontamination cycle processing system of incineration flue gas according to claim 8, it is characterised in that the water washing device sets
There is the water supplement port being connected with outside water supply, the water supplement port leads on the pipeline of spray thrower located at water washing cycles pump, the moisturizing
Mouth is provided with the water compensating valve of control moisturizing.
10. the decontamination cycle processing system of incineration flue gas according to claim 9, it is characterised in that in I between the overflow
Liquid level sensor I is provided with, the control circuit is connected respectively with liquid level sensor I, electromagnetic valve, by liquid level sensor I to water
I liquid level is monitored and to control circuit sending signal, is opened and closed by control circuit control electromagnetic valve between the overflow washed under tower, when
When I liquid level is low between overflow, water compensating valve is opened；When I liquid level is high between overflow, water compensating valve is closed；Liquid level is provided with II between the overflow
Sensor II, the control circuit is connected respectively with liquid level sensor II, caustic make up pump, by liquid level sensor II to alkali cleaning
II liquid level is monitored and to control circuit sending signal, is opened by control circuit control caustic make up pump between the overflow under tower
Close, when 2nd liquid level is low between overflow, caustic make up pump is opened；When 2nd liquid level is high between overflow, caustic make up pump is closed.
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| CN201611156383.7A CN106582237A (en) | 2016-12-14 | 2016-12-14 | Incineration flue gas purification and cyclic treatment system |
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| CN201611156383.7A CN106582237A (en) | 2016-12-14 | 2016-12-14 | Incineration flue gas purification and cyclic treatment system |
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