CN208130805U - A kind of efficient SNCR denitration device - Google Patents
A kind of efficient SNCR denitration device Download PDFInfo
- Publication number
- CN208130805U CN208130805U CN201721922888.XU CN201721922888U CN208130805U CN 208130805 U CN208130805 U CN 208130805U CN 201721922888 U CN201721922888 U CN 201721922888U CN 208130805 U CN208130805 U CN 208130805U
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- China
- Prior art keywords
- temperature
- valve
- surge tank
- reducing agent
- measuring point
- Prior art date
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- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 26
- 239000007921 spray Substances 0.000 claims abstract description 20
- 239000012895 dilution Substances 0.000 claims abstract description 11
- 238000010790 dilution Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 10
- 239000000243 solution Substances 0.000 abstract description 8
- 238000002425 crystallisation Methods 0.000 abstract description 3
- 230000008025 crystallization Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model relates to a kind of efficient SNCR denitration device, solves the problem of denitration efficiency is low, and reducing agent solution is easy crystallization.The invention includes denitrating system and temperature control system.Denitrating system includes reducing agent dissolving tank, surge tank, dilution water pot, distributor, meter, spray gun, boiler, pressure reducing valve, overheated steam pipe, exhaust valve, control valve.Temperature control system includes：Processor, electrically operated valve, the first temperature measuring point, the second temperature measuring point.Denitrating system guarantees that reducing agent is uniformly distributed in boiler, and temperature control system guarantees the effective temperature control of whole denitrating system, guarantees that reducing agent solution does not crystallize the temperature with denitration.The inventive structure is simple, low in cost, and it is convenient to operate, and sealing effect is good, and using technology convenient for universal, the underworkings suitable for being prone to water leak accident is used.
Description
Technical field
The utility model belongs to the out of stock technical field of flue gas, specially a kind of efficient SNCR denitration device.
Background technique
Air environment pollution in recent years is got worse, especially the acid rain problem of sulfur dioxide and discharged nitrous oxides initiation
The degree of disaster has been had reached, or even has constrained the sustainable development of national economy, has seriously affected the existence of the mankind.According to
《" 13 " energy-saving and emission-reduction synthetic operation scheme》Target, arrive the year two thousand twenty, national discharged nitrous oxides overall control is 1574
Within ten thousand tons.
In order to reach emission reduction standard, it would be desirable to study efficient denitration technology.In denitration technology both domestic and external, dry method is de-
Nitre technology accounts for dominant position, and non-catalytic reduction technology SNCR therein is as denitration in the stove technology, and investment is relatively low, because of its property
Valence is received than high by numerous enterprise customers.For the technology, the safety of maintenance system is particularly significant, so often selecting without quick-fried
Dangerous urea is fried as reducing agent.From general technical, reaction motive force is fume high-temperature, and technique wants temperature
Ask relatively high, if system temperature is lower than 900oC will cause so-called " ammonia penetrates ", and temperature is excessively high, and ammonia can be then oxidized
At nitric oxide.Meanwhile in north of china in winter very severe cold, can also frequent occurrence urea liquid low temperature crystallization the phenomenon that.Due to this
Crystallization process is irreversible, therefore will cause pipeline permanent plugging, brings great economic loss.Therefore, this technology due to
Reason as above causes denitration efficiency low, and under optimal conditions, SNCR can generally obtain the NOx removal rate of 40-60%, thus make
The about promotion and application of SNCR denitration technology, it is difficult to meet requirement, using effect is unsatisfactory.
Since country is increasingly strict to pollutant emission requirement is initiated, situation environment friendly system stoppage in transit as above occur will incur
The fine of wholesale stops transport even will cause damp production for a long time, and additional economic loss is even more inestimable, therefore it changes
Into with innovate imperative, and have a very important significance.
Summary of the invention
The purpose of the utility model is to overcome shortcomings and deficiencies of the prior art, provide a kind of efficient SNCR denitration dress
It sets.
The utility model solves technical problem by following technical solution.A kind of efficient SNCR denitration device, packet
Include denitrating system and temperature control system.Denitrating system guarantees that reducing agent is uniformly distributed in boiler, and temperature control system guarantees
The whole effective temperature control of denitrating system, guarantees that reducing agent solution does not crystallize the temperature with denitration.
Denitrating system includes reducing agent dissolving tank, surge tank, dilution water pot, distributor, meter, spray gun, boiler, decompression
Valve, overheated steam pipe, exhaust valve, control valve.Temperature control system includes：Processor, electrically operated valve, the first temperature measuring point, second
Temperature measuring point.
Reducing agent dissolving tank in denitrating system is connected with surge tank, and dilution water pot is connected by control valve with surge tank,
Exhaust valve is arranged in surge tank top, and superheated steam is connected by electrically operated valve with surge tank, and surge tank outlet is connected with distributor.
Overheated steam enters meter by pressure reducing valve, and overheated steam is then sent into distributor, and export distributor connects spray gun,
Spray gun is extend into boiler.
Reducing agent solution is transported in surge tank by the reducing agent dissolving tank in denitrating system, and dilution water is according to process requirement
It is added in surge tank by control valve, exhaust valve is arranged in surge tank top, mainly for the air for preventing heat source from carrying secretly causes
Dilute cavitation (in.Superheated steam controls steam vapour amount by electrically operated valve, into surge tank, surge tank outlet and distributor phase
Even.Export distributor connects spray gun, and spray gun is extend into boiler.
Overheated steam a part enters boiler by pressure reducing valve and spray gun, and reducing agent is atomized, and uniformly sprays into boiler,
Play the role of improving denitration efficiency.Another part overheated steam enters surge tank by electrically operated valve, adjusts denitrating system
Temperature, the technological temperature of denitrating system is fed back to by processor by the first temperature measuring point.
Temperature control system is arranged on above-mentioned denitrating system, and is arranged on the conveyance conduit of reducing agent dissolving tank
Two temperature measuring points, the second temperature measuring point are connected with Temperature processor, send temperature signal to processor.First is arranged on surge tank
Temperature measuring point sends the temperature signal of surge tank to processor.Electrically operated valve is arranged on overheated steam conveyance conduit.
One critical-temperature is set on a processor, once the second temperature measuring point feedback temperature is lower than the setting value and trend song
Line downlink, processor issue electrically operated valve open instructions, until the first temperature measuring point feedback temperature on surge tank is higher than a certain set
Definite value, processor issue the instruction that electrically operated valve is shut, until the second temperature measuring point feedback temperature is again below setting value and trend
When curve downlink, the circulation is executed again.
It is the control panel in order to protect SNCR system that valve is closed when temperature is higher than technological temperature in surge tank.Simultaneously
PLC the or DCS control system of SNCR system can replace processor execution to be automatically brought into operation.
The inventive structure is simple, low in cost, and it is convenient to operate, and denitration effect is good, using technology convenient for universal, suitable for north
Square cold district denitration uses.
Detailed description of the invention
Attached drawing 1 is denitrification apparatus structural schematic diagram of the invention.
Diagram：1 reducing agent dissolving tank, 2 surge tanks, 3 dilution water pots, 4 distributors, 5 meters, 6 spray guns, 7 boilers, 8 subtract
Pressure valve, 9 superheated steams, 10 electrically operated valves, 11 exhaust valves, 12 first temperature measuring points, 13 second temperature measuring points, 14 processors, 15 controls
Valve.
Specific embodiment
As shown in Figure 1, the efficient SNCR denitration device, including denitrating system and temperature control system.Denitrating system
Guaranteeing that reducing agent is atomization in boiler and is uniformly distributed, temperature control system guarantees the effective temperature control of whole denitrating system,
Guarantee that reducing agent solution does not crystallize and guarantee the technological temperature of denitration.
Denitrating system includes reducing agent dissolving tank 1, surge tank 2, dilution water pot 3, distributor 4, meter 5, spray gun 6, pot
Furnace 7, pressure reducing valve 8, overheated steam pipe 9, exhaust valve 11, control valve 15.Temperature control system includes：Processor 14, electrically operated valve
10, the first temperature measuring point 12, the second temperature measuring point 13.
Reducing agent solution tank 1 in denitrating system is connected with surge tank 2, and dilution water pot 3 passes through control valve 15 and surge tank 2
It is connected, exhaust valve 11 is arranged in 2 top of surge tank, inputs overheated steam in overheated steam pipe, passes through electrically operated valve 10 and buffering
Tank 2 is connected, and the outlet of surge tank 2 is connected with distributor 4.Overheated steam enters meter 5 by pressure reducing valve 8, then will overheat
Vapor is sent into distributor 4, the outlet of distributor 4 connection spray gun 6, and spray gun 6 is extend into boiler 7.
Reducing agent solution is transported in surge tank 2 by the reducing agent dissolving tank 1 in denitrating system, and dilution water is according to technique need
It to be added in surge tank 2 by control valve 15, exhaust valve 11 is arranged in 2 top of surge tank, mainly for preventing heat source from carrying secretly
Air causes dilution cavitation (in.Superheated steam controls steam vapour amount by electrically operated valve 10, and into surge tank 2, surge tank 2 goes out
Mouth is connected with distributor 4.The outlet of distributor 4 connection spray gun 6, spray gun 6 are extend into boiler 7.
Overheated steam a part enters boiler 7 by pressure reducing valve 8 and spray gun 6, and reducing agent is atomized, boiler is uniformly sprayed into
In 7, play the role of improving denitration efficiency.Another part overheated steam enters surge tank 2 by electrically operated valve 10, and adjustment is de-
The technological temperature of denitrating system is fed back to processor 14 by the first temperature measuring point 12 by the temperature of nitre system.
Temperature control system is arranged on above-mentioned denitrating system, is arranged on the conveyance conduit of reducing agent dissolving tank 1
Second temperature measuring point 13, the second temperature measuring point 13 are connected with Temperature processor 14, send temperature signal to processor 14.It is buffering
First temperature measuring point 12 is set on tank 2, sends the temperature signal of surge tank 2 to processor 7.The setting of electrically operated valve 10 is overheating
On vapor pipeline.
14 one critical-temperature of setting on a processor, once 13 feedback temperature of the second temperature measuring point lower than the setting value and
Trend curve downlink, processor 7 issue electrically operated valve open instructions, until 12 feedback temperature of the first temperature measuring point on surge tank 2
Higher than a certain setting value, processor 7 issues the instruction that electrically operated valve is shut, until 13 feedback temperature of the second temperature measuring point is low again
When setting value and trend curve downlink, the circulation is executed again.
It is the control panel in order to protect SNCR system that valve is closed when temperature is higher than technological temperature in surge tank 2.Simultaneously
PLC the or DCS control system of SNCR system can replace processor execution to be automatically brought into operation.
For example, a critical-temperature is set on processor 7, once 13 feedback temperature of the second temperature measuring point is lower than the setting
Value and trend curve downlink, processor 7 issue electrically operated valve 10 and open instruction, until one temperature measuring point 1 of temperature control on surge tank 2
12 feedback temperature >=85 DEG C, processor 7 issue electrically operated valve 10 and close instruction, until two temperature measuring point of temperature control, 13 feedback temperature is again
It is secondary be lower than setting value and trend curve downlink when, execute the circulation again.
It is the control panel in order to protect SNCR system that valve is closed when temperature is higher than 85 DEG C in surge tank.
Claims (3)
1. a kind of efficient SNCR denitration device, it is characterised in that：Including denitrating system and temperature control system, denitrating system includes
Reducing agent dissolving tank, surge tank, dilution water pot, distributor, meter, spray gun, boiler, pressure reducing valve, overheated steam pipe, exhaust
Valve, control valve；Temperature control system includes processor, electrically operated valve, the first temperature measuring point, the second temperature measuring point；In denitrating system
Reducing agent dissolving tank is connected with surge tank, and dilution water pot is connected by control valve with surge tank, and exhaust valve is arranged in surge tank top,
Superheated steam is connected by electrically operated valve with surge tank, and surge tank outlet is connected with distributor；Overheated steam passes through pressure reducing valve
Into meter, overheated steam is then sent into distributor, export distributor connects spray gun, and spray gun is extend into boiler；Temperature
Spending control system is arranged on denitrating system, is arranged the second temperature measuring point on the conveyance conduit of reducing agent dissolving tank, second
Temperature measuring point is connected with Temperature processor, sends temperature signal to processor；First temperature measuring point is set on surge tank, will be buffered
The temperature signal of tank sends processor to, and electrically operated valve is arranged on overheated steam conveyance conduit.
2. a kind of efficient SNCR denitration device according to claim 1, it is characterised in that：Superheated steam a part is by subtracting
Pressure valve and spray gun enter boiler, and reducing agent is atomized, and uniformly spray into boiler.
3. a kind of efficient SNCR denitration device according to claim 1, it is characterised in that：Superheated steam passes through electrically operated valve
Into surge tank, the temperature of denitrating system is adjusted, the technological temperature of denitrating system is fed back to by processor by the first temperature measuring point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721922888.XU CN208130805U (en) | 2017-12-29 | 2017-12-29 | A kind of efficient SNCR denitration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721922888.XU CN208130805U (en) | 2017-12-29 | 2017-12-29 | A kind of efficient SNCR denitration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208130805U true CN208130805U (en) | 2018-11-23 |
Family
ID=64284051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721922888.XU Expired - Fee Related CN208130805U (en) | 2017-12-29 | 2017-12-29 | A kind of efficient SNCR denitration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208130805U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108126498A (en) * | 2017-12-29 | 2018-06-08 | 黑龙江昱泰重型机器制造有限公司 | A kind of efficient SNCR denitration device and out of stock method |
-
2017
- 2017-12-29 CN CN201721922888.XU patent/CN208130805U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108126498A (en) * | 2017-12-29 | 2018-06-08 | 黑龙江昱泰重型机器制造有限公司 | A kind of efficient SNCR denitration device and out of stock method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181123 |