CN106943758A - A kind of device and method that ammoniacal liquor is evaporated and diluted simultaneously with boiler hot air - Google Patents
A kind of device and method that ammoniacal liquor is evaporated and diluted simultaneously with boiler hot air Download PDFInfo
- Publication number
- CN106943758A CN106943758A CN201710295771.1A CN201710295771A CN106943758A CN 106943758 A CN106943758 A CN 106943758A CN 201710295771 A CN201710295771 A CN 201710295771A CN 106943758 A CN106943758 A CN 106943758A
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- Prior art keywords
- ammoniacal liquor
- ammonia
- hot air
- spray gun
- double
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- 235000011114 ammonium hydroxide Nutrition 0.000 title claims abstract description 148
- 238000000034 method Methods 0.000 title claims abstract description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 179
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 89
- 239000007921 spray Substances 0.000 claims abstract description 72
- 238000000889 atomisation Methods 0.000 claims abstract description 11
- 230000008016 vaporization Effects 0.000 claims abstract description 7
- 238000009834 vaporization Methods 0.000 claims abstract description 6
- 238000001704 evaporation Methods 0.000 claims description 19
- 230000008020 evaporation Effects 0.000 claims description 17
- 238000010790 dilution Methods 0.000 claims description 15
- 239000012895 dilution Substances 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- 239000003546 flue gas Substances 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 7
- 239000010865 sewage Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 238000007865 diluting Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 8
- 239000000908 ammonium hydroxide Substances 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 239000004202 carbamide Substances 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002309 gasification Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000010025 steaming Methods 0.000 description 3
- 230000032258 transport Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- -1 steam Chemical compound 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
- B01D1/0041—Use of fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
- B01D1/0058—Use of waste energy from other processes or sources, e.g. combustion gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
- B01F23/12—Mixing gases with gases with vaporisation of a liquid
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/10—Separation of ammonia from ammonia liquors, e.g. gas liquors
Abstract
The invention discloses a kind of device and method that ammoniacal liquor is evaporated and diluted simultaneously with boiler hot air, it, which is solved, manufacture in the prior art ammonia system cost height, to the blockage problem of nozzle, and the device includes the tank used for storing ammonia for being used to store ammoniacal liquor；Pressure empty tank for providing compressed air；Double-current spray gun body is set in ammoniacal liquor evaporator, ammoniacal liquor evaporator, and tank used for storing ammonia, pressure empty tank are individually connected with double-current spray gun body respectively, to be atomized by double-current spray gun body to ammoniacal liquor；Boiler hot air channel, boiler hot air channel is connected with ammoniacal liquor evaporator by pipeline, set air-heater that boiler hot air is brought into ammoniacal liquor evaporator on the pipeline, the hot-wind inlet of ammoniacal liquor evaporator is less than the set location of double-current spray gun body, the ammoniacal liquor of atomization evaporates and vaporized in the presence of hot blast, while hot blast is diluted to the ammonia of vaporization.
Description
Technical field
The present invention relates to flue gas pollutant NOx removal field, more particularly to one kind boiler hot air steams ammoniacal liquor simultaneously
Hair and the device and method of dilution.
Background technology
Conventional denitrification reducing agent is ammoniacal liquor (20~30% concentration), urea, liquefied ammonia.No matter which kind of reducing agent, be required for
Gaseous state thing is made in its solution, ammonia-spraying grid (AIG systems) could be sprayed into.Urea as during reducing agent, it is necessary to first be made 50%
The urea liquid storage of left and right concentration, hydrolyzer is then injected urea solution into pump or pyrolysis apparatus is hydrolyzed or is pyrolyzed and is made
Gas, thermal source uses more than 500 DEG C of heat smoke or directly obtains thermal source using oil product burning, and the system complex, investment is high, transports
Row maintenance cost is high；During according to liquefied ammonia as reducing agent, the liquefied ammonia in storage tank first passes through liquefied ammonia and is pumped into liquid ammonia evaporator steaming
Ammonia is made in hair, and whole liquefied ammonia storage, conveying and ammonia system processed are pressure vessel, and liquefied ammonia belongs to poisoning class thing in itself
Matter, fire-fighting requirements are high, and it is stored and transport is subjected to control, can not especially applied in urban district.
And ammoniacal liquor, because storage, transport are simple, invests low, wide material sources as reducing agent, so as a kind of conventional
Denitrification reducing agent.When ammoniacal liquor is as reducing agent, there is the vaporizing system ammonia such as steam, heat smoke at present.When steam is as thermal source, to steaming
The quality of vapour there are certain requirements, and the ammonia needs produced are diluted further to the concentration of regulatory requirements, whole system with dilution wind
It is relative complex.When heat smoke is as thermal source, due to containing dirt in flue gas, atomizer and ammonia-spraying grid nozzle are easily blocked, and
Influence boiler thermal output.
Accordingly, it would be desirable to be produced to ammonia and dilution device is redesigned.
The content of the invention
In order to overcome the deficiencies in the prior art, ammoniacal liquor is evaporated and diluted simultaneously the invention provides one kind boiler hot air
Device, the device using boiler hot air as thermal source, realize by ammoniacal liquor evaporate ammonia processed while, dilution ammonia, dilution efficiency
It is high.
A kind of concrete scheme for the device that ammoniacal liquor is evaporated and diluted simultaneously with boiler hot air is as follows：
A kind of device that ammoniacal liquor is evaporated and diluted simultaneously with boiler hot air, including：
Tank used for storing ammonia for storing ammoniacal liquor；
Pressure empty tank for providing compressed air；
Double-current spray gun body is set in ammoniacal liquor evaporator, ammoniacal liquor evaporator, and tank used for storing ammonia, pressure empty tank spray with two-fluid respectively
Rifle is individually connected, to be atomized by double-current spray gun body to ammoniacal liquor；
Boiler hot air channel, boiler hot air channel is connected with ammoniacal liquor evaporator by pipeline, and air-heater is set on the pipeline
So that boiler hot air is brought into ammoniacal liquor evaporator, the hot-wind inlet of ammoniacal liquor evaporator is less than the set location of double-current spray gun body,
Double-current spray gun body is located at the middle and lower part of ammoniacal liquor evaporator, and the hot-wind inlet of ammoniacal liquor evaporator is less than double-current spray gun body bottom 150mm
~500mm, the ammoniacal liquor of atomization evaporates and vaporized in the presence of hot blast, while hot blast is diluted to the ammonia of vaporization.
By the way that boiler hot air is incorporated into ammoniacal liquor evaporator, ammoniacal liquor evaporator can realize effective removal to impurity, keep away
Exempt from the impurity that can not be evaporated and vaporize in traditional scheme to ammoniacal liquor evaporator and follow-up equipment, the corrosion of pipeline；In addition, ammoniacal liquor steams
Send out and current equalizer is provided with device, can effectively ensure that gas-liquid mixed, realize the rapid evaporation gasification of ammoniacal liquor.
The tank used for storing ammonia is connected with control unit respectively with described pressure empty tank, to control ammoniacal liquor and compressed air to enter
Enter the ratio to double-current spray gun body.
Described control unit is individually connected with automatic switch valve I and pressure sensor I, automatic switch valve I and pressure sensing
Device I is arranged on pressure empty tank and on the link circuit of double-current spray gun body, control unit is PLC.
Described control unit is also individually connected with automatic switch valve II and pressure sensor II, described automatic switch valve II
It is sequentially connected in series with pressure sensor II on the link circuit of tank used for storing ammonia and double-current spray gun body, switch valve plays completely open and close
Effect.
Ammoniacal liquor filter, regulating valve, flowmeter are additionally provided with the link circuit of tank used for storing ammonia and double-current spray gun body, is adjusted
Valve, flowmeter are individually connected with described control unit respectively, and the flow of ammoniacal liquor is adjusted regulating valve, flowmeter measurement ammonia
The size of water-carrying capacity；
Further, described control unit is connected with air-heater, the ammonia aqua stream that control unit is monitored according to flowmeter
The power of amount regulation air-heater.
In order to improve the manufacture speed of ammonia, described double-current spray gun body is used for ammonia atomization into less than 100 microns
Particle.
The bottom of the ammoniacal liquor evaporator is provided with sewage draining exit, for discharging the impurity that can not be evaporated and vaporize in ammoniacal liquor.
The present invention operation principle be：Ammoniacal liquor is pressurized to after the lift of needs by ammonium hydroxide delivery pump gives double-current spray gun body
One of arrival end；Storing compressed air in empty tank is pressed, compressed air is fed to another entrance of double-current spray gun body
End, the port of export of double-current spray gun body is arranged in ammoniacal liquor evaporator；Feeding ammoniacal liquor evaporates after air-heater pressurizes boiler hot air
Device, ammoniacal liquor fine grained rapid evaporation and vaporization under hot blast effect of double-current spray gun body atomization, control unit is according to ammoniacal liquor flow
Size, adjusts the power of air-heater, realizes that variable ratio frequency changer adjusts the flow and pressure of boiler hot air, is needed while ammonia is diluted into
The concentration wanted.
Further, present invention also offers a kind of coal-fired flue-gas NOx removal system, the system includes a kind of described use
The device that ammoniacal liquor is evaporated and diluted simultaneously by boiler hot air, the removing by the system to flue gas NOx, system structure design letter
It is single.
The program is as follows：A kind of reducing agent system of coal-fired flue-gas NOx removal, including described one kind will with boiler hot air
Gas vent at the top of the device that ammoniacal liquor evaporates and diluted simultaneously, ammoniacal liquor evaporator is connected (with right by pipeline with ammonia-spraying grid
NOx is removed in flue gas), because ammoniacal liquor is atomized in the system, ammonia carburation by evaporation speed is fast, and ammonia produces speed
It hurry up, for the removing of nitrogen oxides, removing speed is fast, meanwhile, boiler hot air impurity is few, is prevented effectively from traditional removing system,
The blocking that flue gas is caused to atomizer, to spraying grid nozzle.
In order to overcome the deficiencies in the prior art, realize evaporation ammonia processed simultaneously present invention also offers one kind and dilute ammonia
Method, this method is specific as follows：
The boiler hot air being passed through in the hot-wind inlet for being connected to boiler hot air, hot-wind inlet is set in ammoniacal liquor evaporator side
The atomization ammonia of double-current spray gun body outflow to being set in ammoniacal liquor evaporator is evaporated, and ammonia is made, meanwhile, hot blast is to being made
Ammonia be diluted, the ammonia after dilution is discharged at the top of the ammoniacal liquor evaporator, and by calculating, the temperature of boiler hot air is 250
Between DEG C -400 DEG C, the hot blast of this temperature meets use requirement, it is preferable that 300 DEG C~350 DEG C of boiler hot air, the temperature
The boiler hot air of degree, the ammonia volume ratio after the ammonia for producing ammoniacal liquor evaporating completely can meet dilution.
Flowmeter is monitored to the ammoniacal liquor flow being flowed into double-current spray gun body, and control unit is according to the anti-of flowmeter
Feedback, is controlled by air-heater to the flow for entering boiler hot air in ammoniacal liquor evaporator.
In addition, compressed-air-storing is in pressure empty tank, ammoniacal liquor is admitted to double fluid by tank used for storing ammonia by ammonium hydroxide delivery pump
In spray gun body, link circuit is set between pressure empty tank and double-current spray gun body, automatic switch valve I and pressure sensor I are arranged on
Press empty tank with the link circuit of double-current spray gun body, described automatic switch valve II, ammoniacal liquor flowmeter, pressure sensor II according to
It is secondary to be connected on the link circuit of tank used for storing ammonia and double-current spray gun body, by control unit and switch valve, pressure sensor and flow
Meter is individually connected, and realizes the control to ammonia concentration is made.
Compared with prior art, the beneficial effects of the invention are as follows：
1) apparatus of the present invention are using boiler hot air as thermal source, and apparatus structure is simple, increase low cost, and the present invention is empty by compressing
Gas is atomized to ammoniacal liquor, then by hot wind action, ammoniacal liquor evaporation rate is fast, is easy to quickly produce ammonia, and by hot blast,
Realize the dilution to ammonia.
2) by the setting of control unit in the present invention, the control to ammonia concentration and flow is realized, control accuracy is high, behaviour
Facilitate.
3) by introducing boiler hot air in the present invention, impurity is few, it is not easy to plug nozzle and ammonia-spraying grid, correspondingly reduces
Maintenance cost.
4) ammonia evaporation is effectively increased by the way that the position of double-current spray gun body and hot wind inlet is configured in the present invention
The efficiency of dilution, it is ensured that ammonia Quick uniform is produced.
5) by setting sewage draining exit, the impurity that will can not be evaporated and vaporize in ammoniacal liquor in ammoniacal liquor base of evaporator in the present invention
Discharge in time, it is to avoid corrosion to follow-up equipment and pipeline.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not constitute the improper restriction to the application.
Fig. 1 is structural representation of the invention；
Fig. 2 is the structural representation of ammoniacal liquor evaporator in the present invention；
Shown in figure：1. tank used for storing ammonia, 2. ammonium hydroxide delivery pumps, 4. double-current spray gun bodies, 5. pressure empty tanks, 6. air-heaters,
7. ammoniacal liquor evaporator, 8. boiler hot airs, 9. ammonia-spraying grids, 10. regulating valves, 11. automatic switch valve I, 12. automatic switch valve II,
13. evaporation gasification product exit, 14. pressure-measuring-points, 15. temperature points, 16. spray gun bases, 17. compressed air inlets, 18. ammonia
Water inlet, 19. hot wind inlets, 20. sewage draining exits.
Embodiment
It is noted that described further below is all exemplary, it is intended to provide further instruction to the application.Unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
As background technology is introduced, the deficiencies in the prior art, in order to solve technical problem as above, this Shen
It please propose a kind of device that ammoniacal liquor is evaporated and diluted simultaneously with boiler hot air, system and method.
In a kind of typical embodiment of the application, as shown in Figure 1 there is provided one kind boiler hot air by ammoniacal liquor simultaneously
Evaporation and the device of dilution, the device include tank used for storing ammonia 1, the ammonia concn of the interior storage of tank used for storing ammonia 1 for being used to store ammoniacal liquor
20~30%, pressure empty tank 5 and ammoniacal liquor evaporator 7 for providing compressed air, ammoniacal liquor evaporator 7 is interior to set two-fluid to spray
Rifle 4, double-current spray gun body 4 is horizontally placed on the middle part of ammoniacal liquor evaporator 7, and the ammoniacal liquor ejiction opening of double-current spray gun body 4 is arranged on ammoniacal liquor
In evaporator, and its double-current spray gun body 4 ejiction opening upward.
Tank used for storing ammonia 1, pressure empty tank 5 be individually connected with double-current spray gun body 4 respectively, with by double-current spray gun body 4 to ammoniacal liquor
It is atomized, double-current spray gun body 4 can be set one or more, and multiple spray guns are arranged in parallel, to avoid a spray gun from going wrong
When, the generation of ammonia is still can guarantee that, so that, it is necessary to be repaired, so as to delay ammonia when avoiding the spray gun from going wrong
Acquisition；Ammoniacal liquor in tank used for storing ammonia 1 is fed to double-current spray gun body 4, boiler and ammoniacal liquor evaporator 7 by ammonium hydroxide delivery pump 2
Connected by pipeline, air-heater 6 is set on the pipeline so that boiler hot air 8 is brought into ammoniacal liquor evaporator 7, ammoniacal liquor evaporation
The hot-wind inlet of device 7 is less than the set location of double-current spray gun body 4, and the ammoniacal liquor of atomization evaporates and vaporized in the presence of hot blast, together
When hot blast the ammonia of vaporization is diluted.
As shown in Fig. 2 the bottom of ammoniacal liquor evaporator 7 sets hot wind inlet 19, the evaporation of the distance from bottom ammoniacal liquor of hot wind inlet 19
More than the bottom 10cm of device 7, double-current spray gun body 4, two-fluid spray are set in ammoniacal liquor evaporator 7 relative to the opposite side of hot wind inlet 19
Rifle 4 is configured by spray gun base 16, spray gun base 16 be higher than hot wind inlet 15cm~50cm, with improve ammoniacal liquor by evaporation and
The efficiency of dilution, double-current spray gun body 4 sprays gas-liquid mixture upwards, with along the direction of hot blast, the double-current threshold value of spray gun body 4
The vertical center line setpoint distance of ammoniacal liquor evaporator 7, the distance is set according to detailed programs, is to have certain angle because hot blast enters
, such to set also for evaporation efficiency is improved, ammoniacal liquor evaporator inside has current equalizer, to ensure that flow field is equal
Even, the other end of double-current spray gun body 4 is provided with compressed air inlet 17 and ammoniacal liquor import 18；In addition, at the top of ammoniacal liquor evaporator 7
Provided with temperature point to set temperature in temperature sensor measurement ammoniacal liquor evaporator 7, it is additionally provided with pressure-measuring-point to set gas pressure
Force sensor measuring pressure size, gas pressure sensor is individually connected with temperature sensor with control unit, to pass through
Collection of the control unit to temperature and pressure, to find potential safety problem in time, blowdown is set in the bottom of ammoniacal liquor evaporator 7
Mouthfuls 20, the black impurity that being had when ammoniacal liquor is dirtier can not gasify on a small quantity is discharged by bottom blow-down mouthful 20, and the ammonia of generation is from steaming
Getting angry product exit 13 is discharged, and separately sets bearing in the upper semisection of the housing of ammoniacal liquor evaporator 7, bearing protrudes housing and set, with
It is easy to the fixation to the aloft position of evaporator 7.
Ammonium hydroxide delivery pump uses centrifugal multistage pump multiple centrifugal pump, and the lift for ammoniacal liquor to be pressurized to needs, ammonium hydroxide delivery pump is arranged on
The outlet of tank used for storing ammonia 1.
In order to be controlled to entering ammoniacal liquor evaporator compressed air, ammoniacal liquor, boiler hot air flow, spy sets control
Unit, control unit is the other kinds of controllers such as PLC or DCS, the tank used for storing ammonia 1 and described pressure
Empty tank 5 is connected with control unit respectively, to control ammoniacal liquor and compressed air to enter the ratio of double-current spray gun body 4.
Described control unit is individually connected with automatic switch valve I11 and pressure sensor I, automatic switch valve I11 and pressure
Sensor I is arranged on pressure empty tank 5 and on the link circuit of double-current spray gun body 4, automatic switch valve I is for controlling compressed air
The no double-current spray gun body of flow direction, pressure sensor I is used for the pressure size for detecting compressed air.
Described control unit is also individually connected with automatic switch valve II12 and pressure sensor II, described automatic switch valve
II and pressure sensor II are sequentially connected in series on the link circuit of tank used for storing ammonia and double-current spray gun body.
Ammoniacal liquor filter, regulating valve 10, flowmeter are additionally provided with the link circuit of tank used for storing ammonia 1 and double-current spray gun body 4,
Regulating valve 10, flowmeter are individually connected with described control unit respectively；Control unit receives pressure sensor I, pressure sensing
Device II, flowmeter signal, are controlled to automatic switch valve I11, automatic switch valve II12 and regulating valve 10；Automatic switch valve
II is used to control whether ammoniacal liquor flows to double-current spray gun body；Regulating valve is used for the flow for adjusting ammoniacal liquor；Flowmeter is used to measure flow
Size；Pressure sensor II is used for the pressure size for detecting ammoniacal liquor, and hand-operated valve is also equipped with before and after regulating valve 10, is realized
The maintenance of regulating valve 10 and the bypass regulation of ammoniacal liquor.
Described control unit is connected with air-heater 6, and air-heater 6 uses centrifugal blower, and centrifugal blower can interlock and set
Put many, it is to avoid the failure of a certain centrifugal blower, centrifugal blower uses frequency conversion fan, it is mainly added to boiler hot air
Pressure, makes the boiler hot air entered in ammoniacal liquor evaporator 7 have enough pressure；The ammoniacal liquor that control unit is monitored according to flowmeter
The power of Flow-rate adjustment air-heater, so that the concentration for controlling ammonia to be diluted.
In order to which the rapid evaporation for realizing ammoniacal liquor is vaporized, described double-current spray gun body be used for by ammonia atomization into 100 microns with
Under particle.
The present embodiment additionally provides the removing that obtained ammonia can be applied to flue gas nitrogen oxide, and spy provides a kind of coal-fired
The reducing agent system of flue gas NOx removing, system structure design is simple, and system includes described one kind boiler hot air, and ammoniacal liquor is same
When evaporate and dilution device, the gas vent at the top of ammoniacal liquor evaporator is connected with ammonia-spraying grid by pipeline, the system answered
Use and this ammoniacal liquor evaporator is used in 3 × 130t/h of certain steam power plant boiler SCR denitration projects, ammoniacal liquor evaporation gasification result is good, effect
Rate is high.
In order to overcome the deficiencies in the prior art, realize evaporation ammonia processed simultaneously present invention also offers one kind and dilute ammonia
Method, this method can realize rapid evaporation to ammoniacal liquor, vaporization, obtain ammonia, and ammonia concentration is controlled, specifically such as
Under：
The boiler hot air being passed through in the hot-wind inlet for being connected to boiler hot air, hot-wind inlet is set in ammoniacal liquor evaporator side
The atomization ammonia of double-current spray gun body outflow to being set in ammoniacal liquor evaporator is evaporated, and ammonia is made, meanwhile, hot blast is to being made
Ammonia be diluted, the ammonia after dilution is discharged at the top of the ammoniacal liquor evaporator.
Flowmeter is monitored to the ammoniacal liquor flow being flowed into double-current spray gun body, and control unit is according to the anti-of flowmeter
Feedback, is controlled by air-heater to the flow for entering boiler hot air in ammoniacal liquor evaporator.
In addition, compressed-air-storing is in pressure empty tank, ammoniacal liquor is admitted to double fluid by tank used for storing ammonia by ammonium hydroxide delivery pump
In spray gun body, link circuit is set between pressure empty tank and double-current spray gun body, automatic switch valve I and pressure sensor I are arranged on
Press empty tank with the link circuit of double-current spray gun body, described automatic switch valve II, ammoniacal liquor flowmeter, pressure sensor II according to
It is secondary to be connected on the link circuit of tank used for storing ammonia and double-current spray gun body, by control unit and switch valve, pressure sensor and flow
Meter is individually connected, and realizes the control to ammonia concentration is made.
The preferred embodiment of the application is the foregoing is only, the application is not limited to, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent, improvement etc., should be included within the protection domain of the application.
Claims (10)
1. a kind of device that ammoniacal liquor is evaporated and diluted simultaneously with boiler hot air, it is characterised in that including：
Tank used for storing ammonia for storing ammoniacal liquor；
Pressure empty tank for providing compressed air；
Ammoniacal liquor evaporator, sets double-current spray gun body in ammoniacal liquor evaporator, tank used for storing ammonia, pressure empty tank respectively with double-current spray gun body list
Solely connection, to be atomized by double-current spray gun body to ammoniacal liquor；
Boiler hot air channel, boiler hot air channel is connected with ammoniacal liquor evaporator by pipeline, and air-heater is set on the pipeline to incite somebody to action
Boiler hot air is brought into ammoniacal liquor evaporator, and the hot-wind inlet of ammoniacal liquor evaporator is less than the set location of double-current spray gun body, atomization
Ammoniacal liquor evaporate and vaporize in the presence of hot blast, while hot blast is diluted to the ammonia of vaporization.
2. a kind of device that ammoniacal liquor is evaporated and diluted simultaneously with boiler hot air according to claim 1, it is characterised in that
The tank used for storing ammonia is connected with control unit respectively with described pressure empty tank, to control ammoniacal liquor and compressed air to enter double fluid
The ratio of spray gun body.
3. a kind of device that ammoniacal liquor is evaporated and diluted simultaneously with boiler hot air according to claim 2, it is characterised in that
Described control unit is individually connected with automatic switch valve I and pressure sensor I, and automatic switch valve I and pressure sensor I are arranged on
On the link circuit for pressing empty tank and double-current spray gun body.
4. a kind of device that ammoniacal liquor is evaporated and diluted simultaneously with boiler hot air according to claim 3, it is characterised in that
Described control unit is also individually connected with automatic switch valve II and pressure sensor II, and described automatic switch valve II and pressure are passed
Sensor II is sequentially connected in series on the link circuit of tank used for storing ammonia and double-current spray gun body.
5. a kind of device that ammoniacal liquor is evaporated and diluted simultaneously with boiler hot air according to claim 4, it is characterised in that
Be additionally provided with the link circuit of tank used for storing ammonia and double-current spray gun body ammoniacal liquor filter, the regulating valve for adjusting ammoniacal liquor flow,
Flowmeter, regulating valve, flowmeter are individually connected with described control unit respectively；
Further, described control unit is connected with air-heater, and the ammoniacal liquor flow that control unit is monitored according to flowmeter is adjusted
Save the power of air-heater.
6. a kind of device that ammoniacal liquor is evaporated and diluted simultaneously with boiler hot air according to claim 4, it is characterised in that
Described double-current spray gun body is used for ammonia atomization into less than 100 microns of particle.
7. a kind of device that ammoniacal liquor is evaporated and diluted simultaneously with boiler hot air according to claim 1, it is characterised in that
The bottom of the ammoniacal liquor evaporator is provided with sewage draining exit, for discharging the impurity that can not be evaporated and vaporize in ammoniacal liquor.
8. a kind of reducing agent system of coal-fired flue-gas NOx removal, it is characterised in that including any one of claim 1-7
It is a kind of ammoniacal liquor is evaporated simultaneously with boiler hot air and dilution device, gas vent at the top of ammoniacal liquor evaporator by pipeline with
Ammonia-spraying grid is connected.
9. a kind of realize while evaporating ammonia processed and diluting the method for ammonia, it is characterised in that is set in ammoniacal liquor evaporator side
The boiler hot air being passed through in the hot-wind inlet of boiler hot air, hot-wind inlet is connected to spray the two-fluid set in ammoniacal liquor evaporator
The atomization ammonia of rifle outflow is evaporated, and ammonia is made, meanwhile, hot blast is diluted to obtained ammonia, the ammonia after dilution
Discharged at the top of from ammoniacal liquor evaporator.
10. a kind of method realized evaporation ammonia processed simultaneously and dilute ammonia as claimed in claim 9, it is characterised in that stream
Gauge is monitored to the ammoniacal liquor flow being flowed into double-current spray gun body, and control unit passes through hot blast according to the feedback of flowmeter
Blower fan is controlled to the flow for entering boiler hot air in ammoniacal liquor evaporator.
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| CN201710295771.1A CN106943758A (en) | 2017-04-28 | 2017-04-28 | A kind of device and method that ammoniacal liquor is evaporated and diluted simultaneously with boiler hot air |
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| CN201710295771.1A CN106943758A (en) | 2017-04-28 | 2017-04-28 | A kind of device and method that ammoniacal liquor is evaporated and diluted simultaneously with boiler hot air |
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| CN110302671A (en) * | 2019-04-25 | 2019-10-08 | 太仓北新建材有限公司 | A kind of spray ammonia control system |
| CN111410253A (en) * | 2020-03-12 | 2020-07-14 | 浙江浩普环保工程有限公司 | Desulfurization wastewater concentrated solution atomization device and atomization anti-blocking method |
| CN112892208A (en) * | 2021-01-21 | 2021-06-04 | 浙江京洋环保科技有限公司 | Ammonia water gasification denitration process in boiler |
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