CN208476777U - SNCR denitration engineering test platform - Google Patents
SNCR denitration engineering test platform Download PDFInfo
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- CN208476777U CN208476777U CN201821299849.3U CN201821299849U CN208476777U CN 208476777 U CN208476777 U CN 208476777U CN 201821299849 U CN201821299849 U CN 201821299849U CN 208476777 U CN208476777 U CN 208476777U
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Abstract
The utility model provides a kind of SNCR denitration engineering test platform, including distribution gas handling system, plug flow reactor assembly and sampling and testing system；Plug flow reactor assembly includes boiler tube, and outside is provided with electric heater, and boiler tube bottom is connected with the blower for pumping；Distribution gas handling system includes for two groups of gas bottles with gas cylinder, first group includes nitrogen cylinder, oxygen cylinder, dioxide bottle and nitric oxide gas cylinder, each gas bottle gas outlet is sequentially connected pressure reducing valve and mass flowmenter respectively, steam evaporator and mixed air preheater entrance is connected in metering again, mixed air preheater outlet is connect by mixed gas sample injection gun with boiler tube, second group includes nitrogen cylinder and ammonia bottle, the two gas outlet is sequentially connected pressure reducing valve and mass flowmenter respectively, then is connect by ammonia sample injection gun with boiler tube；Sampling and testing system is connect with boiler tube, for measuring the concentration of ammonia in flue gas gas after denitration.By distribution simulated flue gas, it can be achieved that smoke components are stablized, experimental condition repeatability is high.
Description
Technical field
The utility model belongs to flue gas pollutant field of purification, is related to a kind of SNCR denitration engineering test platform.
Background technique
The fossil fuel such as coal, petroleum, natural gas can generate nitrogen oxides (NOx) in combustion, and substance of this kind is discharged into
Atmosphere is one of main reason of acid rain.There are mainly three types of approach by the NOx generated in combustion process: (1) heating power type, fuel combustion
Contain nitrogen in the air blasted in burning, oxidation generates nitrogen oxides at high temperature；(2) Quick-type, by fuel combustion process
The CH atomic group of generation hits N2Molecule generates CN class compound, and further oxidation generates nitrogen oxides；(3) fuel type, combustion
Itrogenous organic substance in material volatilizees release oxygenolysis in combustion for nitrogen oxides.
For the NOx that removing fossil fuel generate in combustion, selective non-catalytic reduction removing NOx skill can be used
Art.The technology is that the reducing agent containing NHi base is sprayed into the region that fire box temperature is 800~1000 DEG C, with the NOx in flue gas
It is reacted, generates N2.For this method using burner hearth as reactor, technological system is simple, and denitration efficiency is reachable after process optimization
50% or more.
SNCR denitration technical principle are as follows: 4NH3+4NO+O2→4N2+6H2O, the chemical reaction course is complicated, existing research table
Bright, in the reaction time, reaction temperature, oxygen content of smoke gas, the factors such as flying dust have an impact to denitration efficiency, for research denitration efficiency and
Relationship between each influence factor is needed through testing stand come analog fuel burning and SNCR denitration process.
Fuel is passed through in boiler tube by existing testing stand by screw rod batcher, and blower blasts air, raw after fuel combustion
At flue gas, it is passed through reducing agent or other additives in boiler tube specific position, is polluted for studying in fuel combustion process and flue gas
Object subtractive process.The generating mode of flue gas is identical as production reality in this type testing stand, but since fuel performance is not easy to tie up
It holds constant, it will the repeatability of test is had an impact.Meanwhile existing testing stand is when carrying out SNCR denitration test, to de-
The measurement of concetration precision of ammonia in flue gas gas is not high after nitre, influences the accuracy of test.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts provides a kind of SNCR denitration engineering test
Platform, by distribution simulated flue gas, it can be achieved that smoke components are stablized, experimental condition repeatability is high.
In order to achieve the above objectives, the utility model is achieved using following technical scheme:
SNCR denitration engineering test platform, including distribution gas handling system, plug flow reactor assembly and sampling and testing system；
The plug flow reactor assembly includes boiler tube, and outside is provided with electric heater, and boiler tube bottom is connected with for taking out
The blower of gas；
The distribution gas handling system includes for two groups of gas bottles with gas cylinder, and first group includes nitrogen cylinder, oxygen cylinder, dioxy
Change carbon gas cylinder and nitric oxide gas cylinder, each gas bottle gas outlet is sequentially connected pressure reducing valve and mass flowmenter respectively, then with metering
Steam evaporator is simultaneously connected in mixed air preheater entrance, and mixed air preheater outlet is connect by mixed gas sample injection gun with boiler tube, and second
Group includes nitrogen cylinder and ammonia bottle, and the two gas outlet is sequentially connected pressure reducing valve and mass flowmenter respectively, then passes through ammonia sample introduction
Rifle is connect with boiler tube；
The sampling and testing system is connect with boiler tube, for measuring the concentration of ammonia in flue gas gas after denitration.
Preferably, it second assembles after gas cylinder gas outlet is sequentially connected pressure reducing valve and mass flowmenter respectively, also by mending ammonia
Sample injection gun is connect with boiler tube.
Further, it is provided with ammonia sample injection gun cooling water pipeline on ammonia sample injection gun, mends and is provided with benefit ammonia on ammonia sample injection gun
Sample injection gun cooling water pipeline.
Further, ammonia sample injection gun and benefit ammonia sample injection gun internal layer are fine quartz glass tube, and outer layer is water cold sleeve.
Preferably, be provided with insulating layer outside boiler tube, it is wrapped in electric heater in, electric heater is warm by temperature control
Galvanic couple is connected with temperature control system.
Preferably, the sampling and testing system includes the sampling gun for extracting hybrid reaction gas in boiler tube, one end with
Boiler tube connection, the other end are passed through optical detection feeler lever one end by heat tracing diamond heating, optical detection feeler lever other end difference
It is connected with the escaping of ammonia laser spectral analysis instrument and aspiration pump.
Further, sampling gun stretching boiler tube part is connected with flue gas analyzer.
Further, boiler tube outer portion is stretched out in sampling gun be provided with sampling gun elevating mechanism.
Further, sampling gun stretching boiler tube outer portion is provided with sampling gun cooling water pipeline.
Preferably, the distribution gas handling system, in plug flow reactor assembly and sampling and testing system, each gas piping material
Matter is all made of 316L stainless steel.
Compared with prior art, the utility model has the following beneficial effects:
Testing stand described in the utility model, by way of distribution, by gas in gas bomb after pressure reducing valve release,
Mass flowmenter metering by the setting of each branch, is passed through mixed gas preheating chamber, preheating is uniformly mixed by mixed gas preheating chamber, by mixing
Gas sample injection gun is passed through boiler tube upper position.Ammonia is carried by nitrogen, after distinguishing accurate measurement by mass flowmenter, is passed through boiler tube
Constant temperature zone starting position；So as to accurately be set according to test demand to each component in simulated flue gas, make distribution group
Ratio is divided to maintain constant, the repeatability of guarantee test condition.
Further, by the way that ammonia is divided into two-way, gas is passed through boiler tube constant temperature zone start bit through ammonia sample injection gun all the way
It sets；Another way gas will mend ammonia sample injection gun and protrude into boiler tube different location, spray into boiler tube, so as to try according to test needs
Test influence of the substep spray ammonia to denitration efficiency.
Further, by being provided with recirculated cooling water pipeline in ammonia sample injection gun and benefit ammonia sample injection gun, to prevent ammonia
It decomposes at high temperature, influences test effect.
Further, by setting fine quartz glass tube for ammonia sample injection gun and benefit ammonia sample injection gun internal layer, to reduce ammonia
Absorption of the gas in tube wall, metering precision during guarantee test.
Further, by being connected with temperature control system to the heater outside boiler tube, make temperature control system according to reality
Shi Wendu is automatically adjusted heater power, is finally reached the dynamic equilibrium of temperature, and the work of plug flow reactor assembly is steady
After fixed, boiler tube actual temperature and temperature control system set temperature deviation are within ± 10 DEG C.
Further, by detecting flue for the optical detection feeler lever in the escaping of ammonia analyzer as ammonia density, in tubular type companion
Under conditions of hot stove heating, the method absorbed using infrared laser spectroscopy can accurately be determined in extracted simulated flue gas
Ammonia concentration.
Further, by the way that flue gas analyzer is arranged, thus to other gas componants in flue gas, such as nitric oxide, oxygen,
The concentration of the gases such as nitrogen is measured.
Further, by the way that sampling gun elevating mechanism, the position protruded into boiler tube for controlling sampling gun, to take out is arranged
Different tests residence time reaction mixture gas is taken to be tested.
Detailed description of the invention
Fig. 1 is SNCR denitration engineering test platform schematic diagram described in the utility model.
Wherein: 1. match gas cylinder；2. measuring steam evaporator；3. mass flowmenter；4. mixed gas preheating chamber；5. mixed gas sample introduction
Rifle；6. ammonia sample injection gun；7. ammonia sample injection gun cooling water pipeline；8. mending ammonia sample injection gun；9. mending ammonia sample injection gun cooling water pipeline；
10. temperature control system；11. temperature-control heat couple；12. electric heater；13. boiler tube；14. insulating layer；15. sampling gun；16. taking
Sample gun cooling water pipeline；17. sampling gun elevating mechanism；18. optical detection feeler lever；19. heat tracing tube furnace；20. aspiration pump；21.
The escaping of ammonia laser spectral analysis instrument；22. flue gas analyzer；23. blower.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
As shown in Figure 1, mainly including three parts: distribution gas handling system, plug flow reactor assembly and sampling and testing system.
Distribution gas handling system is by with gas cylinder 1, metering steam evaporator 2, mass flowmenter 3, mixed air preheater 4, mixed gas
Sample injection gun 5, ammonia sample injection gun cooling water pipeline 7, mends ammonia sample injection gun 8, mends 9 groups of ammonia sample injection gun cooling water pipeline ammonia sample injection gun 6
At；It is wherein two groups of gas bombs with gas cylinder 1, first group includes nitrogen cylinder, oxygen cylinder, dioxide bottle and nitric oxide gas
Bottle, second group includes nitrogen cylinder and ammonia bottle；Nitrogen cylinder, oxygen cylinder, dioxide bottle and nitric oxide gas cylinder pass through decompression
After valve release, first assembles the experimental condition as needed of gas cylinder 1 is sequentially connected pressure reducing valve and mass flow from gas outlet respectively
Meter 3 controls flow by mass flowmenter 3, then steam evaporator 2 and is connected in mixed 4 entrance of air preheater with metering；Measure water
After steam generator 2 quantitatively generates vapor, by being passed through mixed air preheater 4 with the pipeline that electric tracing heats；In mixed air preheater 4
In be uniformly mixed, the gas after heat temperature raising is exported from mixed air preheater 4 and is exported as simulated flue gas, by mixing gas sample injection gun 5
It is passed through the constant temperature zone upper position of boiler tube 13 in plug flow reactor assembly；Second assembles 1 gas outlet of gas cylinder is sequentially connected respectively
Pressure reducing valve and mass flowmenter 3, ammonia is after the metering of mass flowmenter 3, under nitrogen carrying, is divided into two-way, a routing ammonia
Sample injection gun 6 is passed through the constant temperature zone starting position of boiler tube 13 in plug flow reactor assembly, another way gas according to test needs,
Boiler tube different location is protruded by benefit ammonia sample injection gun 8, is sprayed into boiler tube, influence of the test substep spray ammonia to denitration efficiency；To prevent
Ammonia is decomposed at high temperature, and ammonia sample injection gun cooling water pipeline 7 is provided on ammonia sample injection gun 6, is mended and is set on ammonia sample injection gun 8
It is equipped with and mends ammonia sample injection gun cooling water pipeline 9；Ammonia sample injection gun 6 is identical with 8 basic structure of ammonia sample injection gun is mended, and internal layer is fine quartz glass
Glass pipe can reduce ammonia in the absorption of tube wall, and outer layer is the water cold sleeve of 316L stainless steel tube material.
Plug flow reactor assembly is by temperature control system 10, temperature-control heat couple 11, electric heater 12, boiler tube 13 and protects
Warm layer 14 forms；Mixed gas sample injection gun 5 and ammonia sample injection gun 6 are connected at the top of boiler tube 13, outside is provided with electric heater 12, boiler tube
13 bottoms are connected with for the blower 23 of pumping and the sampling gun 15 for extracting hybrid reaction gas in boiler tube 13, outside boiler tube 13
Be provided with insulating layer 14, it is wrapped in electric heater 12 in, electric heater 12 is connected with temperature by temperature-control heat couple 11
Control system 10.
After experiment work temperature is arranged in temperature control system 10, electric heater 12 carries out heat temperature raising, control to boiler tube 13
Warm galvanic couple 11 is used to monitor the real time temperature of boiler tube 13 and feeds back temperature signal into temperature control system 10, when boiler tube temperature
After degree reaches set temperature, temperature control system 10 adjusts adding for electric heater 12 according to set temperature and actual temperature situation
Thermal power is finally reached the dynamic equilibrium of temperature；After plug flow reactor assembly the operation is stable, boiler tube center actual temperature and temperature
Control system set temperature deviation is spent within ± 10 DEG C.Electric heater 12 is Si-Mo rod electric heater；Temperature-control heat couple 11 is R
Type thermocouple (platinum rhodium 13- platinum thermocouple)；Boiler tube 13 is single alundum tube；Insulating layer 14 is polycrystalline alumina fiber cotton.
Sampling and testing system is visited by sampling gun 15, sampling gun cooling water pipeline 16, sampling gun elevating mechanism 17, optical detection
Bar 18, heat tracing tube furnace 19, aspiration pump 20, the escaping of ammonia laser spectral analysis instrument 21, flue gas analyzer 22 and blower 23 form；It takes
15 one end of sample rifle is arranged in 13 bottom of boiler tube, and the other end is passed through 18 one end of optical detection feeler lever heated by heat tracing tube furnace 19,
18 other end of optical detection feeler lever is connected separately with the escaping of ammonia laser spectral analysis instrument 21 and aspiration pump 20, and sampling gun 15 stretches out furnace
13 part of pipe is provided with sampling gun cooling water pipeline 16 and sampling gun elevating mechanism 17, is also connected with flue gas analyzer 22.Sampling
15 internal layer of rifle is quartz glass tube, and outer layer is water cold sleeve；Sampling gun elevating mechanism 17 is for controlling sampling gun 15 in boiler tube 13
In the position protruded into, extract different residence time reaction mixture gas and tested；It is to reduce and taken out that sampling gun, which leads to cooling water,
The temperature for answering mixed gas is negated, SNCR reaction is quenched.
The mixed gas in boiler tube 13 is passed through after SNCR reacts, 15 abstraction reaction gaseous mixture of sampling gun reduces gas temperature
Degree stops reaction.Sampled gun cooling water pipeline 16 cool down after gas extraction boiler tube after, two-way is divided by triple valve, one
It routes aspiration pump 20 to suck in optical detection feeler lever 18 (maintaining about 300 DEG C of temperature with heat tracing tube furnace 19), the escaping of ammonia laser light
Spectrum analysis instrument 21 issues monochromatic infrared laser by optical fiber and injects in optical detection feeler lever 18, and the ammonia in flue gas, which generates, absorbs light
Spectrum measures the concentration of ammonia in simulated flue gas after the escaping of ammonia laser spectral analysis instrument 21 receives absorption spectrum signal；All the way
Gas is passed through in flue gas analyzer 22, the gas component concentrations such as measurement nitrogen oxides, carbon dioxide, oxygen.It is anti-to be passed through plug flow
All hybrid reaction gas in device system are answered to be discharged into outside atmosphere by blower 23.
In the distribution gas handling system, plug flow reactor assembly and sampling and testing system, each gas piping material
It is all made of 316L stainless steel.
The above content is only to illustrate the technical idea of the utility model, and the protection model of the utility model cannot be limited with this
Enclose, it is all according to the utility model proposes technical idea, any changes made on the basis of the technical scheme each falls within this reality
Within protection scope with novel claims.
Claims (10)
1.SNCR denitration technology testing stand, which is characterized in that surveyed including distribution gas handling system, plug flow reactor assembly and sampling
Test system；
The plug flow reactor assembly includes boiler tube (13), and outside is provided with electric heater (12), the connection of boiler tube (13) bottom
There is the blower (23) for pumping；
The distribution gas handling system includes for two groups of gas bottles with gas cylinder (1), and first group includes nitrogen cylinder, oxygen cylinder, dioxy
Change carbon gas cylinder and nitric oxide gas cylinder, each gas bottle gas outlet is sequentially connected pressure reducing valve and mass flowmenter (3) respectively, then with meter
Amount steam evaporator (2) is simultaneously connected in mixed air preheater (4) entrance, mix air preheater (4) outlet by mixed gas sample injection gun (5) with
Boiler tube (13) connection, second group includes nitrogen cylinder and ammonia bottle, and the two gas outlet is sequentially connected pressure reducing valve and mass flow respectively
It counts (3), then is connect by ammonia sample injection gun (6) with boiler tube (13)；
The sampling and testing system is connect with boiler tube (13), for measuring the concentration of ammonia in flue gas gas after denitration.
2. SNCR denitration engineering test platform according to claim 1, which is characterized in that second assembles gas cylinder (1) gas outlet
After being sequentially connected pressure reducing valve and mass flowmenter (3) respectively, also it is connect by mending ammonia sample injection gun (8) with boiler tube (13).
3. SNCR denitration engineering test platform according to claim 2, which is characterized in that ammonia sample injection gun is provided on (6)
Ammonia sample injection gun cooling water pipeline (7) is mended to be provided on ammonia sample injection gun (8) and mends ammonia sample injection gun cooling water pipeline (9).
4. SNCR denitration engineering test platform according to claim 3, which is characterized in that ammonia sample injection gun (6) and mend ammonia into
Sample rifle (8) internal layer is fine quartz glass tube, and outer layer is water cold sleeve.
5. SNCR denitration engineering test platform according to claim 1, which is characterized in that be provided with heat preservation outside boiler tube (13)
Layer (14), it is wrapped in electric heater (12) in, electric heater (12) is connected with temperature control by temperature-control heat couple (11)
System (10) processed.
6. SNCR denitration engineering test platform according to claim 1, which is characterized in that the sampling and testing system includes using
In the sampling gun (15) for extracting boiler tube (13) interior hybrid reaction gas, one end is connect with boiler tube (13), and the other end is passed through by heat tracing
Optical detection feeler lever (18) one end of tube furnace (19) heating, optical detection feeler lever (18) other end are connected separately with the escaping of ammonia and swash
Light spectroanalysis instrument (21) and aspiration pump (20).
7. SNCR denitration engineering test platform according to claim 6, which is characterized in that sampling gun (15) stretches out boiler tube (13)
Outer portion is connected with flue gas analyzer (22).
8. SNCR denitration engineering test platform according to claim 6, which is characterized in that stretch out boiler tube in sampling gun (15)
(13) outer portion is provided with sampling gun elevating mechanism (17).
9. SNCR denitration engineering test platform according to claim 6, which is characterized in that sampling gun (15) stretches out boiler tube (13)
Outer portion is provided with sampling gun cooling water pipeline (16).
10. SNCR denitration engineering test platform described in -9 any one according to claim 1, which is characterized in that the distribution into
Gas system, in plug flow reactor assembly and sampling and testing system, each gas piping material is all made of 316L stainless steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821299849.3U CN208476777U (en) | 2018-08-13 | 2018-08-13 | SNCR denitration engineering test platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821299849.3U CN208476777U (en) | 2018-08-13 | 2018-08-13 | SNCR denitration engineering test platform |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109060704A (en) * | 2018-08-13 | 2018-12-21 | 中国华能集团有限公司 | A kind of SNCR denitration engineering test platform |
| CN113390807A (en) * | 2021-06-16 | 2021-09-14 | 桂林理工大学 | Simulation low carbon chemical combustion gas spectrum test system |
-
2018
- 2018-08-13 CN CN201821299849.3U patent/CN208476777U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109060704A (en) * | 2018-08-13 | 2018-12-21 | 中国华能集团有限公司 | A kind of SNCR denitration engineering test platform |
| CN113390807A (en) * | 2021-06-16 | 2021-09-14 | 桂林理工大学 | Simulation low carbon chemical combustion gas spectrum test system |
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