CN205003125U - Performance detection device of denitration catalyst - Google Patents
Performance detection device of denitration catalyst Download PDFInfo
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- CN205003125U CN205003125U CN201520791567.5U CN201520791567U CN205003125U CN 205003125 U CN205003125 U CN 205003125U CN 201520791567 U CN201520791567 U CN 201520791567U CN 205003125 U CN205003125 U CN 205003125U
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Abstract
The utility model provides a performance detection device of denitration catalyst, including gas distribution system, heating system and detecting system, gas distribution system includes the distribution jar body and air inlet pipeline, thereby power plant's flue gas is simulated in the mist raw materials to distribution jar body and function, and the distribution jar body is connected through the air inlet pipeline heating system, heating system include preheater and reacting furnace, and the preheater is connected the air inlet pipeline, reacting furnace and detecting system are supporting, pass through at the mist to its heat supply, ensure the catalyst complete reaction during denitration catalyst. The utility model designs a not problem of adaptation of catalyst shape and reactor shape has been solved to the catalyst fixed frame, when having fixed the catalyst better, guarantees that the catalyst can the complete reaction for the testing result is more accurate.
Description
Technical field
The utility model relates to the operational characteristic Indexs measure technical field of denitrating catalyst.
Background technology
The use principle of the SCR denitration that coal-fired power plant selects is NO and NH in flue gas
3under denitrating catalyst existent condition, react N at a certain temperature that generate and do not have contaminative
2and H
2o, reaction principle is:
4NO+4NH
3+O
2→4N
2+6H
2O，
6NO+4NH
3→5N
2+6H
2O。
But denitration efficiency is relevant with several factors in course of reaction, temperature of reaction is on the impact of denitration rate, flue gas flow is on the impact of denitration rate, NO concentration is on the impact of denitration rate, liquid water content is on the impact etc. of denitration rate, under different condition, the activity of catalyzer is not quite similar, especially the activity of flue-gas temperature to denitrating catalyst has a significant impact, general performance pick-up unit is when detecting catalyst activity, the temperature that flue gas flows through catalyzer duct can not be controlled accurately, be difficult to the homogeneity ensureing the temperature of reaction of catalyzer in reactor simultaneously, a defect is also had to be exactly that reactor sealing is good not, easy Leakage Gas, cause prohibited data detection true, and toxic gas leaks in air and works the mischief to human body.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of device for detecting performance of denitrating catalyst, can overcome Problems existing in background technology, accurately detects the performance index of denitrating catalyst under each condition, and environmental protection is practical.
The technical scheme that the utility model technical solution problem adopts is: the device for detecting performance of denitrating catalyst, comprise gas distributing system, heating system and detection system, described gas distributing system comprises distribution tank body and air inlet pipeline, described distribution tank body is used for mixed gas feed thus simulative power plant flue gas, described distribution tank body connects described heating system by air inlet pipeline, described heating system comprises preheating furnace and reacting furnace, described preheating furnace connects described air inlet pipeline, described reacting furnace and described detection system supporting, mixed gas by during described denitrating catalyst to its heat supply, guarantee catalyzer complete reaction.
While employing technique scheme, the utility model can also adopt or combine and adopt following further technical scheme:
Mixer is provided with in described distribution tank body, described mixer is for configuring the gas from standard steel cylinder, the described gas from standard steel cylinder comprises oxygen, nitrogen, nitric oxide gas and sulfur dioxide gas, described mixer comprises tubular body, one end of tubular body is provided with air intake opening, the other end is provided with gas outlet, sealed by sealing-plug between described air intake opening and tubular body, the outer end of described air intake opening is provided with set collar, is provided with along the uniform baffle of gas flow direction in described tubular body.
The periphery of described baffle and the contact internal walls of described tubular body, described baffle is along 45 ° of direction distortions, and the direction of twist of described baffle is towards the Way out of described tubular body, and described baffle is arranged in order along described gas flow direction.
Described air inlet pipeline comprises and connects described mixer outlet and the mixed gas pipeline of described heating system and the air inlet pipeline of ammonia, described mixed gas pipeline is connected to described heating system, described mixed gas pipeline is provided with flowmeter, retaining valve and operation valve, the front end of described mixed gas pipeline is provided with decompressor, the air inlet pipeline of described ammonia is connected to detection system, and the air inlet pipeline of described ammonia is provided with flowmeter.
Described preheating furnace comprises body of heater, the coil pipe coiled along its length is provided with in body of heater, the entrance of described coil pipe is connected to described mixed gas pipeline, the outlet of described coil pipe is connected to the entrance of reacting furnace, heat-preservation cotton is filled between the body of heater of described coil pipe and described preheating furnace, in the middle part of the entrance of described preheating furnace, body of heater and exit is equipped with the thermopair for detecting gas temperature, and the body of heater of described preheating furnace is installed fixing by vertical supports.
Described detection system comprises pick-up unit, described pick-up unit is set in described reacting furnace, described pick-up unit comprises reactor, the middle part of reactor is provided with catalyzer fixed mount, catalyzer is arranged in described catalyzer fixed mount, and the top of described reactor is provided with gas access, and mixed gas enters inside reactor from the gas access of reactor, flow out from the gas outlet of described reactor after denitrating catalyst, the gas vent of described reactor connects flue gas analyzer.
The two ends of described reactor are provided with rapid-acting coupling, and described rapid-acting coupling is fixedly connected with described reactor by rapid-acting coupling latch segment.
The periphery of described catalyzer fixed mount is cylindrical, and the inside of described catalyzer fixed mount forms the space of rectangular parallelepiped, and the profile of its shape and catalyzer is suitable, and the longitudinal section of described catalyzer fixed mount is I shape.
The inwall of described reactor is provided with the mounting structure of catalyzer fixed mount, described mounting structure is the bracing frame arranged along the inwall of described reactor, the inner wall shape on the top of support frame as described above is consistent with the peripheral shape of described catalyzer fixed mount, and the inner diameter of support frame as described above bottom is between the peripheral diameter and the inner wall size of catalyzer fixed mount of catalyzer fixed mount.
The porch of described reactor is provided with thermocouple sheath, and described thermopair is fixedly mounted on described thermocouple sheath, and its end is stretched in the duct of catalyst center.
The beneficial effects of the utility model are: the pending flue gas that the utility model is discharged by gas distributing system simulative power plant, by stable for proterties oxygen, nitrogen, sulphuric dioxide and CO gas first proportionally mix, the relatively unstable ammonia of proterties directly passes in reactive system, in gas distributing system, the gas of each composition is all designed with independently air inlet pipeline, and be furnished with flowmeter and operation valve, the flow of flue gas can be changed, the concentration of each composition in flue gas, moisture etc., the performance index of accurate detection denitrating catalyst under each condition, and the NH used in pick-up unit
3, NO, SO
2etc. hazardous gas, easily stick to pipeline and flowmeter inside, independently N of the present utility model
2air inlet loop can as the scavenging pipeline of whole device, with clean N
2pipeline and flowmeter are purged, extends the serviceable life of flowmeter.In addition, the profile of catalyzer is square, and the inwall of reactor is circular, there is portion gas can spill from catalyzer both sides when passing into gas, can not complete reaction, the Performance Detection of catalyzer can be affected, the utility model devises catalyzer fixed mount, solve catalyst shape and the not adaptive problem of reactor shape, while securing catalyzer better, guarantee that catalyzer can complete reaction, make testing result more accurate, and, in order to make there is good sealing between catalyzer and reactor, inside reactor is designed to more bigger than catalyzer width square, catalyzer is wound around with pyroceram fibre cotton before loading reactor, ensure that the sealing between catalyzer and reactor, gas can not be leaked from catalyst side, reactor upper flange place uses high temperature resistant graphite grazing, for convenience detach, high temperature resistant and good airproof performance.In order to make inside reactor homogeneous heating, the square connection of reactor outer circular and inside is designed to sky body, ensure that the homogeneity of inside reactor monolith temperature.
Accompanying drawing explanation
Fig. 1 is one-piece construction figure of the present utility model.
Fig. 2 is the structural drawing of reactor of the present utility model.
Fig. 3 is the structural drawing of mixer of the present utility model.
Fig. 4 is the schematic diagram of another angle of Fig. 3.
Fig. 5 is process flow diagram of the present utility model.
Embodiment
With reference to accompanying drawing.
The device for detecting performance of denitrating catalyst of the present utility model, comprise gas distributing system, heating system and detection system, described gas distributing system comprises distribution tank body 1 and air inlet pipeline 2, distribution tank body 1 is for mixed gas feed thus simulative power plant flue gas, distribution tank body logical 1 is crossed air inlet pipeline 2 and is connected heating system, heating system comprises preheating furnace 3 and reacting furnace 4, preheating furnace 3 connects air inlet pipeline 2, reacting furnace 4 and detection system supporting, when mixed gas passes through denitrating catalyst to its heat supply, guarantee catalyzer complete reaction.
Mixer 5 is provided with in distribution tank body 1, mixer 5 is for configuring the gas from standard steel cylinder, gas from standard steel cylinder comprises oxygen, nitrogen, nitric oxide gas and sulfur dioxide gas, mixer 5 comprises tubular body 6, one end of tubular body 6 is provided with air intake opening 7, and the other end is provided with gas outlet 8, is sealed between air intake opening 7 and tubular body 6 by sealing-plug 9, the outer end of air intake opening 7 is provided with set collar 10, is provided with along the uniform baffle 11 of gas flow direction in tubular body 6.
The periphery of baffle 11 and the contact internal walls of tubular body 6, the periphery of baffle 11 is arc, baffle 11 is along 45 ° of direction distortions or bending, the distortion of baffle 11 (or bending) direction is towards the Way out of tubular body 6, multiple baffle is arranged in order along gas flow direction, the distortion of such baffle 11 or overbending direction define along the entrance of tubular body 6 to the gas flow of the complications of Way out through passage, can guarantee that gas fully mixes in the passage of complications on the one hand, can gas backstreaming be prevented on the other hand.
Air inlet pipeline 2 comprises and connects mixer 5 and export and the mixed gas pipeline 14 of heating system and the air inlet pipeline 15 of ammonia, mixed gas pipeline is connected to heating system, mixed gas pipeline is provided with flowmeter, retaining valve 27 and operation valve 28, the front end of described mixed gas pipeline is provided with decompressor, the air inlet pipeline of ammonia is connected to detection system, the air inlet pipeline of ammonia is provided with flowmeter, and mixed gas pipeline comprises corresponding O respectively
2, N
2, NO and SO
2each single gas passage, each single gas passage is equipped with flowmeter, retaining valve and operation valve, each single gas passage is connected to mixer, thus form the mixed gas needed for detecting, air inlet pipeline also comprises pure water feeding-passage and reserved gas feed passageway, mixed gas air inlet pipeline is also provided with filtrator 30, prevents the solid particle in gas from entering detection system, affect the performance of catalyzer.
Preheating furnace 3 comprises body of heater 12, the coil pipe 13 coiled along its length is provided with in body of heater 12, the entrance of coil pipe 13 is connected to mixed gas pipeline 14, the outlet of coil pipe 13 is connected to the entrance of reacting furnace 4, heat-preservation cotton is filled between the body of heater 12 of coil pipe 13 and preheating furnace, in the middle part of the entrance of preheating furnace, body of heater and exit is equipped with the thermopair for detecting gas temperature, and the body of heater 12 of preheating furnace is installed fixing by vertical supports 16.
Detection system comprises pick-up unit 17, pick-up unit 17 is set in reacting furnace 4, pick-up unit 17 comprises reactor 18, the middle part of reactor 18 is provided with catalyzer fixed mount 19, denitrating catalyst is arranged in catalyzer fixed mount 19, and the top of reactor 18 is provided with gas access 20, and mixed gas enters inside reactor from the gas access 20 of reactor 18, flow out from the gas vent 21 of reactor 18 after denitrating catalyst, the gas vent 21 of reactor connects flue gas analyzer.
The two ends of reactor 18 are provided with rapid-acting coupling 22, and rapid-acting coupling 22 is fixedly connected with reactor 18 by rapid-acting coupling latch segment 23.
The periphery of catalyzer fixed mount 19 is cylindrical, and the inside of catalyzer fixed mount 19 forms the space of rectangular parallelepiped, and the profile of its shape and catalyzer is suitable, and the longitudinal section of catalyzer fixed mount 19 is I shape.
The inwall of reactor 18 is provided with the mounting structure of catalyzer fixed mount 19, mounting structure is the bracing frame 24 arranged along the inwall of reactor 18, the inner wall shape on the top of bracing frame 24 is consistent with the peripheral shape of catalyzer fixed mount 19, and the inner diameter of bracing frame 24 bottom is between the peripheral diameter and the inner wall size of catalyzer fixed mount 19 of catalyzer fixed mount 19.
The porch of reactor 18 is provided with thermocouple sheath 25, and thermopair 26 is fixedly mounted on thermocouple sheath 25, and its end is stretched in the duct of catalyst center.
Reactor 18 is set in reacting furnace 4, and the periphery of reactor 18 is wrapped up by tile 29, is filled between the inwall of tile 29 and reacting furnace 4 by heat-preservation cotton, and reacting furnace 4 is mainly this section of heat supply at denitrating catalyst place, guarantees temperature of reaction.
The feed rate of each material is:
Steel cylinder N
2charging: 0. ~ 20L/min ± 1%F.S
Steel cylinder O
2charging: 0.1 ~ 2L/min ± 1%F.S
Steel cylinder SO
2charging: 0. ~ 200mL/min ± 0.5%F.S
Steel cylinder NO charging: 0. ~ 200mL/min ± 0.5%F.S
Steel cylinder NH
3charging: 0.05 ~ 200mL/min ± 0.5%F.S
Pure water charging: 0 ~ 25mL/min ± 1%F.S
Reserved gas feed 0.1 ~ 5NL/min ± 1%F.S
According to travelling speed and the smoke components of simulated flue gas, according to the total flow under test denitrating catalyst volume computing flue gas standard state, by the flow of each gas in mass flowmeter Control release process and water vapour.
The NH used in this cover denitration performance pick-up unit
3, NO, SO
2for hazardous gas, and easily stick to pipeline and flowmeter inside, therefore design scavenging pipeline, with clean N
2purge three-way connection (pipe) road and flowmeter, extend the serviceable life of flowmeter, purge gas passes through N
2mass flowmeter controls total flow, shunt is installed suspended body flowmeter and regulates the gas flow entering each pipeline.
The protection circuits such as the utility model have also been devised overtemperature alarm, auto-breaking.
Microactivity Test device parameter requires:
Temperature controls: 0 ~ 600 DEG C ± 1 DEG C
Reaction pressure: pressure-fired (0 ~ 0.1MPa ± 0.05)
Connecting pipe between preheating furnace of the present utility model and reacting furnace adopts heat-preservation cotton to be wound around, prevent there is temperature loss in gas flow, body of heater heating is adopted in preheating furnace, inside is the coil pipe of diameter 10mm, be wound around inner 60 circles of burner hearth, coil pipe total length is 19m, ensures that preheating furnace outlet temperature reaches design temperature.Be the stainless steel reactor of 50mm × 50mm × 800mm in reacting furnace, type of heating is the overall electrical heating of body of heater, and smoke pre-heating stove enters reacting furnace by after flue gas to uniform temperature.In the middle part of the entrance of preheating furnace, body of heater, exit is provided with thermopair and detects gas temperature, and furnace gases porch, upper of furnace body, middle part, bottom are provided with thermopair and detect in-furnace temperature.Catalyst pores channel temp is real temperature of reaction, in order to accurately detect the temperature of catalytic inner, a thermocouple sheath is welded at reactor top dead centre, casing length is 400mm, and catalyzer is installed in the middle part of reactor, is just the middle part of reactor, length is 300mm, thermocouple sheath inserts in catalyst center duct, and thermopair inserts in sleeve pipe, and the temperature of thermopair transmission is the actual temperature of SCR denitration reaction.
Catalyst size is the rectangular parallelepiped of 35mm × 35mm × 300mm, reactor outside is column type, in order to make there is good sealing between catalyzer and reactor, inside reactor is designed to more bigger than catalyzer width square, as a rule, inside reactor is of a size of 50mm × 50mm × 755mm, catalyzer is wound around with pyroceram fibre cotton before loading reactor, ensure that the sealing between catalyzer and reactor, gas can not be leaked from catalyst side, reactor upper flange place uses high temperature resistant graphite grazing, for convenience detach, high temperature resistant and good airproof performance.In order to make inside reactor homogeneous heating, the square connection of reactor outer circular and inside is designed to sky body, ensure that the homogeneity of inside reactor monolith temperature.
Testing process of the present utility model as shown in Figure 4, got out the gas O needed for testing before on-test
2, NO, SO
2, N
2, NH
3, need decompressor valve closing before gas line access device entrance, after opening steel cylinder, check whether joint leaks gas with leakage testing liquid.Test catalyst is put into reactor, wraps up in the refractory ceramics bale of cotton, guarantee good seal between catalyzer and reactor wall, connected system pipeline.Calculate each gas flow, arranging nitrogen flow is total gas flow rate, and set temperature is 360 DEG C, opens primary heater and well heater intensification, until temperature stabilization.The design value of corresponding each gas of input, opens O in software
2, N
2, NO, SO
2gas cylinder regulator, and regulate pressure to 0.5-0.6MPa, open O
2, NO, SO
2the valve of gas access to plant, the reducer pressure on adjustment denitrification apparatus, to 0.3MPa, opens the flowmeter in software, starts analysis of initial data, records initial value data in flue gas analyzer after data stabilization 30min.
According to NO concentration and NH
3/ NO mol ratio calculates NH3 flow and by data Input Software, opens NH3 gas cylinder, open NH
3the valve of access to plant, decompressor is adjusted to 0.3MPa, opens NH
3flowmeter, in flue gas analyzer, NO concentration can decline, and records numerical value after waiting for NO data stabilization 30min, needs to keep flue-gas temperature to stablize between the reaction period, calculates the denitration performance of catalyzer.
Denitration rate computing formula:
η NO=(C
nOx, entrance-C
nO, outlet)/C
nO, entrance× 100%;
η NO
x---the denitration efficiency of catalyzer, %;
C
nO, entrance---reactor inlet NO concentration, PPM;
C
nO, outlet---reactor outlet NO concentration, PPM.
Activity value computing formula:
K=0.5×Va×ln(MR/(MR-ηNO)/(1-ηNO))；
The activity value of K---catalyzer, m/h;
MR---ammonia nitrogen mol ratio NH
3/ NO
x;
Va---flue gas by the face velocity of catalyzer, m/h.
NO, NH is closed after off-test
3, O
2, SO
2, use N
2to NO, NH
3, SO
2pipeline and flowmeter purge, and make the hazardous gas of noresidue in pipeline.Close software, computer, power supply successively after purging, detect and terminate.
In process of the test, it should be noted that the suspended body flowmeter purging use in whole process must be in closed condition, avoid hazardous gas to enter purging pipeline; The entrance of mass flowmeter must ensure in the middle of certain limit with outlet pressure reduction, excessive or too smallly all will affect the serviceable life of flowmeter.
Claims (10)
1. the device for detecting performance of denitrating catalyst, it is characterized in that: described device for detecting performance comprises gas distributing system, heating system and detection system, described gas distributing system comprises distribution tank body and air inlet pipeline, described distribution tank body is used for mixed gas feed thus simulative power plant flue gas, described distribution tank body connects described heating system by air inlet pipeline, described heating system comprises preheating furnace and reacting furnace, described preheating furnace connects described air inlet pipeline, described reacting furnace and described detection system supporting, mixed gas by during described denitrating catalyst to its heat supply, guarantee catalyzer complete reaction.
2. the device for detecting performance of denitrating catalyst as claimed in claim 1, it is characterized in that: in described distribution tank body, be provided with mixer, described mixer is for configuring the gas from standard steel cylinder, the described gas from standard steel cylinder comprises oxygen, nitrogen, nitric oxide gas and sulfur dioxide gas, described mixer comprises tubular body, one end of tubular body is provided with air intake opening, the other end is provided with gas outlet, sealed by sealing-plug between described air intake opening and tubular body, the outer end of described air intake opening is provided with set collar, be provided with in described tubular body along the uniform baffle of gas flow direction.
3. the device for detecting performance of denitrating catalyst as claimed in claim 2, it is characterized in that: the periphery of described baffle and the contact internal walls of described tubular body, described baffle is along 45 ° of direction distortions, the direction of twist of described baffle is towards the Way out of described tubular body, and described baffle is arranged in order along described gas flow direction.
4. the device for detecting performance of denitrating catalyst as claimed in claim 2, it is characterized in that: described air inlet pipeline comprises and connects described mixer outlet and the mixed gas pipeline of described heating system and the air inlet pipeline of ammonia, described mixed gas pipeline is connected to described heating system, described mixed gas pipeline is provided with flowmeter, retaining valve and operation valve, the front end of described mixed gas pipeline is provided with decompressor, the air inlet pipeline of described ammonia is connected to detection system, and the air inlet pipeline of described ammonia is provided with flowmeter.
5. the device for detecting performance of denitrating catalyst as claimed in claim 1, it is characterized in that: described preheating furnace comprises body of heater, the coil pipe coiled along its length is provided with in body of heater, the entrance of described coil pipe is connected to described mixed gas pipeline, the outlet of described coil pipe is connected to the entrance of reacting furnace, heat-preservation cotton is filled between the body of heater of described coil pipe and described preheating furnace, in the middle part of the entrance of described preheating furnace, body of heater and exit is equipped with the thermopair for detecting gas temperature, and the body of heater of described preheating furnace is installed fixing by vertical supports.
6. the device for detecting performance of denitrating catalyst as claimed in claim 1, it is characterized in that: described detection system comprises pick-up unit, described pick-up unit is set in described reacting furnace, described pick-up unit comprises reactor, the middle part of reactor is provided with catalyzer fixed mount, catalyzer is arranged in described catalyzer fixed mount, the top of described reactor is provided with gas access, mixed gas enters inside reactor from the gas access of reactor, flow out from the gas outlet of described reactor after denitrating catalyst, the gas vent of described reactor connects flue gas analyzer.
7. the device for detecting performance of denitrating catalyst as claimed in claim 6, it is characterized in that: the two ends of described reactor are provided with rapid-acting coupling, described rapid-acting coupling is fixedly connected with described reactor by rapid-acting coupling latch segment.
8. the device for detecting performance of denitrating catalyst as claimed in claim 6, it is characterized in that: the periphery of described catalyzer fixed mount is cylindrical, the inside of described catalyzer fixed mount forms the space of rectangular parallelepiped, the profile of its shape and catalyzer is suitable, and the longitudinal section of described catalyzer fixed mount is I shape.
9. the device for detecting performance of denitrating catalyst as claimed in claim 6, it is characterized in that: the inwall of described reactor is provided with the mounting structure of catalyzer fixed mount, described mounting structure is the bracing frame arranged along the inwall of described reactor, the inner wall shape on the top of support frame as described above is consistent with the peripheral shape of described catalyzer fixed mount, and the inner diameter of support frame as described above bottom is between the peripheral diameter and the inner wall size of catalyzer fixed mount of catalyzer fixed mount.
10. the device for detecting performance of denitrating catalyst as claimed in claim 1, it is characterized in that: the porch of described reactor is provided with thermocouple sheath, described thermopair is fixedly mounted on described thermocouple sheath, and its end is stretched in the duct of catalyst center.
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|---|---|---|---|
| CN201520791567.5U CN205003125U (en) | 2015-10-14 | 2015-10-14 | Performance detection device of denitration catalyst |
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|---|---|---|---|
| CN201520791567.5U CN205003125U (en) | 2015-10-14 | 2015-10-14 | Performance detection device of denitration catalyst |
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ID=55160008
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353071A (en) * | 2015-10-14 | 2016-02-24 | 浙江广翰环保科技股份有限公司 | Performance detection apparatus for denitration catalyst |
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2015
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353071A (en) * | 2015-10-14 | 2016-02-24 | 浙江广翰环保科技股份有限公司 | Performance detection apparatus for denitration catalyst |
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Address after: 1111 Qingxi 2nd Road, Jiangdong Industrial Park, Xiaoshan District, Hangzhou, Zhejiang 311200 Patentee after: Zhejiang Guanghan Technology Group Co.,Ltd. Address before: 1111 Qingxi 2nd Road, Jiangdong Industrial Park, Xiaoshan District, Hangzhou, Zhejiang 311200 Patentee before: ZHEJIANG GUANGHAN ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |