CN208839370U - A kind of ammonium hydroxide vapourizing unit using fume afterheat - Google Patents
A kind of ammonium hydroxide vapourizing unit using fume afterheat Download PDFInfo
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- CN208839370U CN208839370U CN201821303582.0U CN201821303582U CN208839370U CN 208839370 U CN208839370 U CN 208839370U CN 201821303582 U CN201821303582 U CN 201821303582U CN 208839370 U CN208839370 U CN 208839370U
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- ammonium hydroxide
- ammonia
- flue gas
- fume afterheat
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Abstract
The utility model discloses a kind of ammonium hydroxide vapourizing units using fume afterheat, the ammonium hydroxide vapourizing unit includes ammonium hydroxide supply unit, evaporation element and ammonia supply unit, wherein, the evaporation element is several ammonium hydroxide evaporation tubes being arranged in SCR flue gas denitration reactor exhaust pass, the arrival end of the evaporation element is connected with ammonium hydroxide supply unit and outlet end is connected with ammonia supply unit, and the outlet end of the ammonia supply unit is protruded into SCR flue gas denitration reactor gas approach.Compared with prior art, the utility model takes full advantage of fume afterheat using the ammonium hydroxide vapourizing unit of fume afterheat and carries out ammonium hydroxide vaporization, huge ammonia water evaporator is replaced with the simple ammonium hydroxide evaporation tube of structure, it reduces initial cost cost and reduces ammonium hydroxide vaporization energy consumption, ensure that ammonium hydroxide vaporization effect and denitration effect while saving operating cost.Meanwhile influence very little of the arrangement of ammonium hydroxide evaporation tube to SCR flue gas denitrification system, it can ignore.
Description
Technical field
The utility model relates to the technical fields of denitrating flue gas, more particularly, are related to a kind of ammonia using fume afterheat
Water vapourizer.
Background technique
Ammonium hydroxide is a kind of common SCR denitrating flue gas reducing agent, from a wealth of sources and cheap, in the market common ammonium hydroxide
Concentration is 20~25%, plays the ammonia of reduction being dissolved in water in SCR denitrating flue gas process.
What is generallyd use at present is ammonium hydroxide steam stripping technique, separates ammonia and water using the heat of steam, is stripped off
Ammonia is used for SCR denitrating flue gas, but structure is complicated, cost of investment is high, operation difficulty is big for the used stripper of this technology, and
The water that stripping tower bottom excludes still contains a small amount of ammonia, still need to handle it is up to standard after could discharge, it is less economical.
Improved technology is to extract hot fume by blower, the ammonia in ammonium hydroxide vaporizer, after high warm flue gas and atomization
Water directly mixes, and is vaporized ammonium hydroxide using the heat of high-temperature flue gas, and this technique has used the simple vaporizer of structure to take
For complicated ammonium hydroxide stripper, but this technology is higher to the temperature requirement of flue gas, when flue-gas temperature reduces, needs to increase
The exhaust gas volumn of extraction just ensures ammonium hydroxide vaporization completely, and the size of stripper will be very huge at this time, and fume extraction blower
Power consumption caused by operating cost also will increase dramatically, with the mating SCR equipment for denitrifying flue gas of 1,000,000 tons/year of coke oven of yield
For, when denitration entrance flue gas temperature is only 180 DEG C, the exhaust gas volumn for needing to extract is about 18000Nm3/ h, at this time evaporator
Diameter be more than 2m, the power consumption of fume extraction blower is 55~75KW.
Therefore, de- especially for low-temperature SCR flue gas is used in when ammonium hydroxide is used as the reducing agent of SCR equipment for denitrifying flue gas
The occasion of nitre, develop it is a kind of can using fume afterheat, equipment is small and exquisite and the ammonium hydroxide vapourizing unit of low in investment cost is ten
Divide necessary.
Summary of the invention
In order to solve the problems in the existing technology, the purpose of this utility model is to provide one kind can utilize flue gas
Waste heat, equipment is small and exquisite and the ammonium hydroxide vapourizing unit of low in investment cost, and SCR flue gas denitrification system ammonium hydroxide vaporescence is effectively reduced
Operating cost and initial cost cost.
The utility model provides a kind of ammonium hydroxide vapourizing unit using fume afterheat, and the ammonium hydroxide vapourizing unit includes ammonia
Water supply unit, evaporation element and ammonia supply unit, wherein the evaporation element is several and is arranged in SCR denitrating flue gas
The arrival end of ammonium hydroxide evaporation tube in reactor outlet flue, the evaporation element be connected with ammonium hydroxide supply unit and outlet end with
Ammonia supply unit is connected, and the outlet end of the ammonia supply unit is protruded into SCR flue gas denitration reactor gas approach.
According to the utility model using one embodiment of the ammonium hydroxide vapourizing unit of fume afterheat, several ammonium hydroxide steams
Hair pipe is parallelly arranged in SCR flue gas denitration reactor exhaust pass, the arranged direction of ammonium hydroxide evaporation tube and flow of flue gas side
To vertical.
According to the utility model using one embodiment of the ammonium hydroxide vapourizing unit of fume afterheat, the ammonium hydroxide evaporation tube is
Light pipe, three-dimensional extended surface tube, H-type extended surface tube or riffled tube.
One embodiment of the ammonium hydroxide vapourizing unit of fume afterheat, the ammonium hydroxide supply unit are utilized according to the utility model
It is connected including ammonium hydroxide delivery pump, ammonium hydroxide main pipe and several ammonium hydroxide branch pipes, ammonium hydroxide delivery pump with ammonium hydroxide main pipe, several ammonium hydroxide branch
Pipe is arranged in the outlet end of ammonium hydroxide main pipe and is connected respectively with several ammonium hydroxide evaporation tubes.
One embodiment of the ammonium hydroxide vapourizing unit of fume afterheat, the end of the ammonium hydroxide branch pipe are utilized according to the utility model
End is disposed with atomizer, and the caliber of ammonium hydroxide branch pipe is DN10~DN50, and the flow of each atomizer is 10~100kg/h.
One embodiment of the ammonium hydroxide vapourizing unit of fume afterheat is utilized according to the utility model, the ammonium hydroxide evaporation tube
Caliber is DN25~DN80,2~3 specifications bigger than the caliber of ammonium hydroxide branch pipe.
One embodiment of the ammonium hydroxide vapourizing unit of fume afterheat, the ammonium hydroxide supply unit are utilized according to the utility model
Further include the ammonium hydroxide regulating valve being arranged in ammonium hydroxide main pipe and one end is connected with ammonium hydroxide main pipe and the other end and SCR denitrating flue gas
The connected ammonia circulation circuit of reactor.
One embodiment of the ammonium hydroxide vapourizing unit of fume afterheat, the ammonia supply unit are utilized according to the utility model
Including ammonia main pipe, venturi-type eductors, dilution air and ammonia delivery pipe, the setting of ammonia main pipe is steamed in several ammonium hydroxide
Send out pipe outlet end and be connected with venturi-type eductors, the dilution air be arranged in the upstream of venturi-type eductors and
It is connected with venturi-type eductors, ammonia delivery pipe is arranged in the outlet end of venturi-type eductors and protrudes into the reaction of SCR denitrating flue gas
In device gas approach.
According to the utility model using one embodiment of the ammonium hydroxide vapourizing unit of fume afterheat, dilution air extracts 120
~300 DEG C of hot-air or low-temperature flue gas is passed through the dilution that ammonia is used in venturi-type eductors, the text mound as dilution wind
In injector flow out dilution after ammonia volume fraction be no more than 5%.
According to the utility model using one embodiment of the ammonium hydroxide vapourizing unit of fume afterheat, the ammonia main pipe goes out
Mouth end is provided with temperature measuring unit and pressure measuring unit.
Compared with prior art, the utility model takes full advantage of fume afterheat using the ammonium hydroxide vapourizing unit of fume afterheat
Ammonium hydroxide vaporization is carried out, huge ammonia water evaporator is replaced with the simple ammonium hydroxide evaporation tube of structure, initial cost cost is reduced and drops
Low ammonium hydroxide vaporizes energy consumption, ensure that ammonium hydroxide vaporization effect and denitration effect while saving operating cost.Meanwhile ammonium hydroxide evaporation tube
Influence very little of the arrangement to SCR flue gas denitrification system, can ignore.
Detailed description of the invention
Fig. 1 shows the structure of the ammonium hydroxide vapourizing unit using fume afterheat according to the utility model exemplary embodiment
Schematic diagram.
Fig. 2 shows the cross-sectional views along Section A-A in Fig. 1.
Description of symbols:
I-ammonium hydroxide supply unit, II-evaporation element, III-ammonia supply unit；
1- ammonium hydroxide delivery pump, 2- ammonium hydroxide regulating valve, 3- ammonium hydroxide main pipe, 4- ammonium hydroxide branch pipe, 5- atomizer, 6- ammonium hydroxide steam
Send out pipe, 7- ammonia main pipe, 8- dilution air, 9- venturi-type eductors, 10-SCR flue gas denitration reactor exhaust pass, 11-SCR
Flue gas denitration reactor gas approach, 12- ammonia circulation circuit, 13- ammonia delivery pipe.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
?.
Fig. 1 shows the structure of the ammonium hydroxide vapourizing unit using fume afterheat according to the utility model exemplary embodiment
Schematic diagram, Fig. 2 shows the cross-sectional views along Section A-A in Fig. 1.
As shown in Figure 1, exemplary embodiment according to the present utility model, the ammonium hydroxide vapourizing unit using fume afterheat
Including ammonium hydroxide supply unit I, evaporation element II and ammonia supply unit III, ammonium hydroxide supply unit I is conveyed into evaporation element II
Ammonium hydroxide, evaporation element II carry out ammonium hydroxide using fume afterheat and evaporate the ammonium hydroxide after being vaporized, and ammonia supply unit III will vaporize
Gas afterwards including ammonia and water vapour is delivered to SCR flue gas denitration reactor and carries out denitrating flue gas processing.
As shown in Fig. 2, evaporation element II is several ammonia being arranged in SCR flue gas denitration reactor exhaust pass 10
The arrival end of water evaporation pipe 6, evaporation element II is connected with ammonium hydroxide supply unit III-and outlet end and III phase of ammonia supply unit
Even, the outlet end of ammonia supply unit III is protruded into SCR flue gas denitration reactor gas approach 11.
The utility model suitable location arrangements ammonium hydroxide evaporation tube 6 in SCR flue gas denitrification system, convenient position is
SCR flue gas denitration reactor exhaust pass utilizes the waste heat arranged to the temperature of atmosphere for flue gas after 180~300 DEG C of denitration
Ammonium hydroxide in ammonium hydroxide evaporation tube is vaporized and is warming up to 120~180 DEG C, it is possible thereby to which it is anti-to be sent directly into SCR denitrating flue gas
Device is answered to carry out denitration process.Wherein, influence very little of the arrangement of ammonium hydroxide evaporation tube to SCR flue gas denitrification system or can ignore,
Such as the mating SCR equipment for denitrifying flue gas of coke oven that yield is 1,000,000 tons/year, ammonium hydroxide evaporation tube exports neat stress temperature to SCR denitration
The influence of drop is no more than 2 DEG C.
Preferably, several ammonium hydroxide evaporation tubes 6 are parallelly arranged in SCR flue gas denitration reactor exhaust pass 10, ammonia
The arranged direction of water evaporation pipe 6 is vertical with flow of flue gas direction to guarantee preferably heated vaporization effect.Wherein, ammonium hydroxide evaporation tube
6 can be light pipe, three-dimensional extended surface tube, H-type extended surface tube or riffled tube.
According to the utility model, ammonium hydroxide supply unit I includes ammonium hydroxide delivery pump 1, ammonium hydroxide main pipe 3 and several ammonium hydroxide branch pipes
4, ammonium hydroxide delivery pump 1 is connected with ammonium hydroxide main pipe 3, several ammonium hydroxide branch pipes 4 be arranged in the outlet end of ammonium hydroxide main pipe 3 and respectively with
Several ammonium hydroxide evaporation tubes 6 are connected.Ammonium hydroxide is by entering ammonium hydroxide main pipe 3 as a result, after ammonium hydroxide delivery pump 1, in ammonium hydroxide main pipe 3
Enter ammonium hydroxide branch pipe 4 after being allocated, ammonium hydroxide branch pipe 4 connect with ammonium hydroxide evaporation tube 6 and is more uniformly distributed to ammonium hydroxide each
Higher vaporization efficency is realized in ammonium hydroxide evaporation tube 6.
Wherein it is preferred to first be pressurizeed and be atomized before ammonium hydroxide is sent into ammonium hydroxide evaporation tube, such as can be in ammonium hydroxide
The end of branch pipe arranges that atomizer 5, the caliber of every ammonium hydroxide branch pipe are DN10~DN50, and the flow of each atomizer is 10
~100kg/h.Ammonium hydroxide after atomization enters ammonium hydroxide evaporation tube 6 and completes vaporescence, is changed into the mixing of ammonia-water vapour
Gas, the caliber for being preferably set up ammonium hydroxide evaporation tube 6 is DN25~DN80,2~3 specifications bigger than the caliber of ammonium hydroxide branch pipe.Pass through
Ammonium hydroxide after control atomization enters in ammonium hydroxide evaporation tube, and temperature increases and volume increases, and is more advantageous to the vaporization of ammonium hydroxide.This is practical
Compared to huge ammonium hydroxide vaporizer, cost of investment substantially reduces novel above-mentioned evaporation element structure.
In addition, ammonium hydroxide supply unit I further includes the ammonium hydroxide regulating valve 2 being arranged in ammonium hydroxide main pipe 3 and one end and ammonium hydroxide
The ammonia circulation circuit 12 that main pipe is connected and the other end is connected with SCR flue gas denitration reactor, can be according to the cigarette of denitration entrance
Tolerance and NOx concentration adjust the dosage of ammonium hydroxide.
According to the utility model, ammonia supply unit III includes ammonia main pipe 7, venturi-type eductors 9,8 and of dilution air
Ammonia delivery pipe 13, ammonia main pipe 7 are arranged in the outlet end of several ammonium hydroxide evaporation tubes 6 and are connected with venturi-type eductors 9,
Dilution air 8 is arranged in the upstream of venturi-type eductors 9 and is also connected with venturi-type eductors 9, and the setting of ammonia delivery pipe 6 exists
The outlet end of venturi-type eductors 9 is simultaneously protruded into SCR flue gas denitration reactor gas approach.
Ammonia-the water vapor mixture vaporized in each ammonium hydroxide evaporation tube 6 converges in ammonia main pipe 7, ammonia main pipe 7
It is connected with venturi-type eductors 9, while dilution air 8 is arranged in the upstream of venturi-type eductors 9, dilution air 8 passes through extraction
120~300 DEG C of hot-air or low-temperature flue gas is passed through the dilution that ammonia is used in venturi-type eductors 9, blower as dilution wind
Air quantity can be adjusted according to the consumption of ammonium hydroxide, the volume fraction of ammonia does not surpass after the dilution of venturi-type eductors outflow
Cross 5%.
By taking the mating SCR equipment for denitrifying flue gas of 1,000,000 tons/year of coke oven of yield as an example, when flue-gas temperature is 180 DEG C, take out
The exhaust gas volumn taken is 1800Nm3/ h, the pressure head of dilution air only need 1500~2000Pa, and power of motor is only 11~15KW.This
Outside, due to eliminating ammonium hydroxide vaporizer, power consumption is greatly reduced.
Dilute it is distinguished and admirable through venturi-type eductors 8 when, at aditus laryngis due to sectional area becomes smaller and flow velocity increase, generate 1~
The negative pressure of 3KPa can be such that ammonia-water vapor mixture in ammonia main pipe 7 is successfully aspirated into venturi-type eductors 8,
And passes through in the entrance SCR flue gas denitration reactor gas approach 11 of ammonia delivery pipe 13 after evenly mixing with dilution wind and be directly used in
SCR denitrating flue gas.
Preferably, the outlet end of ammonia main pipe 7 is additionally provided with temperature measuring unit and pressure measuring unit, steams for detecting ammonia air-water
The temperature and pressure of vapour gaseous mixture.
In conclusion the utility model, which takes full advantage of fume afterheat using the ammonium hydroxide vapourizing unit of fume afterheat, carries out ammonia
Water vapor replaces huge ammonia water evaporator with the simple ammonium hydroxide evaporation tube of structure, reduces initial cost cost and reduce ammonium hydroxide
Energy consumption is vaporized, ensure that ammonium hydroxide vaporization effect and denitration effect while saving operating cost.Meanwhile the arrangement of ammonium hydroxide evaporation tube
Influence very little to SCR flue gas denitrification system, can ignore.
The utility model is not limited to specific embodiment above-mentioned.The utility model expands to any in this specification
The new feature of middle disclosure or any new combination, and disclose any new method or process the step of or any new group
It closes.
Claims (10)
1. a kind of ammonium hydroxide vapourizing unit using fume afterheat, which is characterized in that the ammonium hydroxide vapourizing unit includes ammonium hydroxide conveying
Unit, evaporation element and ammonia supply unit, wherein the evaporation element is several and is arranged in SCR flue gas denitration reactor
The arrival end of ammonium hydroxide evaporation tube in exhaust pass, the evaporation element is connected with ammonium hydroxide supply unit and outlet end and ammonia are defeated
Unit is sent to be connected, the outlet end of the ammonia supply unit is protruded into SCR flue gas denitration reactor gas approach.
2. utilizing the ammonium hydroxide vapourizing unit of fume afterheat according to claim 1, which is characterized in that several ammonium hydroxide steams
Hair pipe is parallelly arranged in SCR flue gas denitration reactor exhaust pass, the arranged direction of ammonium hydroxide evaporation tube and flow of flue gas side
To vertical.
3. utilizing the ammonium hydroxide vapourizing unit of fume afterheat according to claim 2, which is characterized in that the ammonium hydroxide evaporation tube is
Light pipe, three-dimensional extended surface tube, H-type extended surface tube or riffled tube.
4. utilizing the ammonium hydroxide vapourizing unit of fume afterheat according to claim 1, which is characterized in that the ammonium hydroxide supply unit
It is connected including ammonium hydroxide delivery pump, ammonium hydroxide main pipe and several ammonium hydroxide branch pipes, ammonium hydroxide delivery pump with ammonium hydroxide main pipe, several ammonium hydroxide branch
Pipe is arranged in the outlet end of ammonium hydroxide main pipe and is connected respectively with several ammonium hydroxide evaporation tubes.
5. utilizing the ammonium hydroxide vapourizing unit of fume afterheat according to claim 4, which is characterized in that the end of the ammonium hydroxide branch pipe
End is disposed with atomizer, and the caliber of ammonium hydroxide branch pipe is DN10~DN50, and the flow of each atomizer is 10~100kg/h.
6. utilizing the ammonium hydroxide vapourizing unit of fume afterheat according to claim 5, which is characterized in that the ammonium hydroxide evaporation tube
Caliber is DN25~DN80,2~3 specifications bigger than the caliber of ammonium hydroxide branch pipe.
7. utilizing the ammonium hydroxide vapourizing unit of fume afterheat according to claim 1, which is characterized in that the ammonium hydroxide supply unit
Further include the ammonium hydroxide regulating valve being arranged in ammonium hydroxide main pipe and one end is connected with ammonium hydroxide main pipe and the other end and SCR denitrating flue gas
The connected ammonia circulation circuit of reactor.
8. utilizing the ammonium hydroxide vapourizing unit of fume afterheat according to claim 1, which is characterized in that the ammonia supply unit
Including ammonia main pipe, venturi-type eductors, dilution air and ammonia delivery pipe, the setting of ammonia main pipe is steamed in several ammonium hydroxide
Send out pipe outlet end and be connected with venturi-type eductors, the dilution air be arranged in the upstream of venturi-type eductors and
It is connected with venturi-type eductors, ammonia delivery pipe is arranged in the outlet end of venturi-type eductors and protrudes into the reaction of SCR denitrating flue gas
In device gas approach.
9. utilizing the ammonium hydroxide vapourizing unit of fume afterheat according to claim 8, which is characterized in that dilution air extracts 120
~300 DEG C of hot-air or low-temperature flue gas is passed through the dilution that ammonia is used in venturi-type eductors, the text mound as dilution wind
In injector flow out dilution after ammonia volume fraction be no more than 5%.
10. utilizing the ammonium hydroxide vapourizing unit of fume afterheat according to claim 8, which is characterized in that the ammonia main pipe
Outlet end is provided with temperature measuring unit and pressure measuring unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821303582.0U CN208839370U (en) | 2018-08-14 | 2018-08-14 | A kind of ammonium hydroxide vapourizing unit using fume afterheat |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821303582.0U CN208839370U (en) | 2018-08-14 | 2018-08-14 | A kind of ammonium hydroxide vapourizing unit using fume afterheat |
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| CN208839370U true CN208839370U (en) | 2019-05-10 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109999646A (en) * | 2019-05-23 | 2019-07-12 | 贾新华 | A kind of SNCR denitration system and method for denitration |
| CN111229037A (en) * | 2020-03-16 | 2020-06-05 | 西安西热锅炉环保工程有限公司 | Denitration device and method for gas-steam combined cycle unit by using ammonia water as reducing agent |
| CN111420551A (en) * | 2020-04-08 | 2020-07-17 | 哈尔滨锅炉厂有限责任公司 | Ammonia water evaporation device for SCR denitration injection system |
| CN113769582A (en) * | 2021-10-26 | 2021-12-10 | 安徽金森源环保工程有限公司 | Ammonia water evaporator device for kiln denitration |
| CN114797432A (en) * | 2022-03-29 | 2022-07-29 | 中国中材国际工程股份有限公司 | Device and method for adjusting temperature and spraying ammonia for denitration by using flue gas of cement plant |
| CN116658925A (en) * | 2023-07-07 | 2023-08-29 | 广州长晟环保有限公司 | Deep denitration process for biomass boiler flue gas |
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2018
- 2018-08-14 CN CN201821303582.0U patent/CN208839370U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109999646A (en) * | 2019-05-23 | 2019-07-12 | 贾新华 | A kind of SNCR denitration system and method for denitration |
| CN111229037A (en) * | 2020-03-16 | 2020-06-05 | 西安西热锅炉环保工程有限公司 | Denitration device and method for gas-steam combined cycle unit by using ammonia water as reducing agent |
| CN111420551A (en) * | 2020-04-08 | 2020-07-17 | 哈尔滨锅炉厂有限责任公司 | Ammonia water evaporation device for SCR denitration injection system |
| CN113769582A (en) * | 2021-10-26 | 2021-12-10 | 安徽金森源环保工程有限公司 | Ammonia water evaporator device for kiln denitration |
| CN113769582B (en) * | 2021-10-26 | 2024-04-16 | 安徽金森源环保工程有限公司 | Ammonia water evaporator device for kiln denitration |
| CN114797432A (en) * | 2022-03-29 | 2022-07-29 | 中国中材国际工程股份有限公司 | Device and method for adjusting temperature and spraying ammonia for denitration by using flue gas of cement plant |
| CN116658925A (en) * | 2023-07-07 | 2023-08-29 | 广州长晟环保有限公司 | Deep denitration process for biomass boiler flue gas |
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