CN207507493U - A kind of SCR denitration on-line regeneration system - Google Patents
A kind of SCR denitration on-line regeneration system Download PDFInfo
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- CN207507493U CN207507493U CN201721510610.1U CN201721510610U CN207507493U CN 207507493 U CN207507493 U CN 207507493U CN 201721510610 U CN201721510610 U CN 201721510610U CN 207507493 U CN207507493 U CN 207507493U
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Abstract
The utility model is related to a kind of SCR denitration on-line regeneration systems, it includes SCR reactors, air-introduced machine, calcium hydroxide filling slot and heater；The SCR reactor heads are provided with entrance, bottom is provided with outlet, inlet valve is installed on entrance, outlet valve is installed in outlet, SCR reactor heads are disposed with exhanst gas outlet, and bottom side is provided with smoke inlet, and exhanst gas outlet connects air-introduced machine entrance by pipeline, air-introduced machine outlet is sequentially connected calcium hydroxide filling slot, heater, then connect smoke inlet by pipeline by pipeline；The air-introduced machine entrance also connects air by second pipe, and regeneration gas inlet valve is provided on second pipe, and air-introduced machine outlet also connects semidry method gas approach, and regeneration gas outlet valve is provided on third pipeline by third pipeline.Advantage is reasonable design, simple in structure, at low cost, and service life is long, simple to operate, and power consumption is low, greatly prolongs the service life of SCR catalyst.
Description
Technical field
The utility model is related to the SCR denitration fields of garbage burning factory, and in particular to a kind of SCR denitration is online again
Raw system.
Background technology
SCR（Selective catalytic reduction）Denitration technology is in SCR catalyst（Such as V2O5/TiO2 and V2O5-WO3/TiO2）
Under effect, reducing agent（Common NH3）NOx is reduced into N2, and the oxidation reaction of NH3 hardly occurs, so as to improve N2's
Selectivity, reduces the consumption of NH3.
SCR catalyst is the core of SCR technology, but with the extension of run time, the activity of SCR catalyst can be notable
It reduces or even inactivation is passivated.Since flue-gas temperature is not high, low-temperature SCR technology in waste incineration industry generally use is run
Temperature is at 170 ~ 250 DEG C.During middle cold operation, though SCR catalyst is not susceptible to be sintered, the SO2 oxidations in flue gas
The SO3 of generation can be with water and ammonia reaction generation ammonium sulfate (AS) and ammonium hydrogen sulfate (ABS).
In addition, flue gas water content is larger in waste incinerator, while different according to the rubbish of burning, numerical fluctuations also can
Bigger, this can also aggravate the generation of sulphur ammonium.Ammonium salt and flying dust little particle, which can be deposited in the aperture on SCR catalyst surface, to be formed
It blocks, NOx, NH3,02 is hindered to reach SCR catalyst activity surface, SCR catalyst is caused to inactivate.
Since SCR catalyst initial investment is big, account for about the 30-50% of entire denitrating system gross investment, when SCR catalyst is lost
After work, being replaced according to new SCR catalyst can cause denitration cost to increase considerably, and need longer furnace outage time,
Generally entered in denitration reaction tower by staff and manually take out SCR catalyst, then SCR catalysis is carried out by regenerated offline technology
Agent regenerates, and required furnace outage time is long, inconvenience easy to operate, and inefficiency and safety be not high.
Invention content
To solve the above problems, the utility model proposes a kind of SCR denitration on-line regeneration system, reasonable design,
Simple in structure, at low cost, service life is long, simple to operate, and power consumption is low, some emergency situations can be avoided to be catalyzed SCR
The influence of agent, efficiency and safety are all improved, and effectively avoid caused machinery damage during SCR catalyst on-line regeneration
Consumption, renewable number increase, and greatly prolong the service life of SCR catalyst.
Technical solutions of the utility model：
A kind of SCR denitration on-line regeneration system, it include SCR reactors, air-introduced machine, calcium hydroxide filling slot and
Heater；The SCR reactor heads are provided with entrance, and bottom is provided with outlet, and inlet valve is equipped on entrance, outlet
On outlet valve is installed, SCR reactor heads are disposed with exhanst gas outlet, and bottom side is provided with smoke inlet, flue gas
Outlet connects air-introduced machine entrance by pipeline, and air-introduced machine outlet is sequentially connected calcium hydroxide filling slot, heater, then lead to by pipeline
Piping connects smoke inlet；The air-introduced machine entrance also connects air by second pipe, and is provided on second pipe
Regeneration gas inlet valve, air-introduced machine outlet also connect semidry method gas approach, and set on third pipeline by third pipeline
It is equipped with regeneration gas outlet valve.
The SCR reactors form SCR denitration system by entrance, outlet SCR denitration device.
SCR catalyst layer is provided in the SCR reactors.
First thermometer, second temperature meter and third thermometer are installed, the first thermometer is located at SCR on the pipeline
Between reactor and air-introduced machine, for second temperature meter between air-introduced machine and calcium hydroxide filling slot, third thermometer is located at niter
It it is 400 DEG C for display pipes temperature between grey filling slot and heater.
Flowmeter is also equipped on the pipeline, flowmeter is between air-introduced machine and calcium hydroxide filling slot, for supervising
Pipeline flow.
The heater uses electric heater, and heat temperature raising is fast, and effect is good, and interlock protection is provided on electric heater
Device.
The interlock protection device uses thermorelay, and thermorelay is mounted on pipeline, electrical connection
Electric heater, and set controlled at 400 DEG C, when temperature is more than 400 DEG C in thermorelay detection pipeline, control
Stop electric heater, ensure regeneration temperature without departing from 400 DEG C, to the physical of SCR catalyst when avoiding regeneration temperature excessively high
It can damage.
The utility model advantage is reasonable design, simple in structure, is improved in original SCR denitration equipment, structure follows
Ring on-line regeneration system, at low cost, service life is long, simple to operate, and power consumption is low, can avoid some emergency situations pair
The influence of SCR catalyst, without from SCR reactors taking-up, transport and the operation links such as SCR catalyst, efficiency is installed again
It is all improved with safety, effectively avoids caused mechanical loss during SCR catalyst on-line regeneration, renewable number increases
Add, greatly prolong the service life of SCR catalyst.
Description of the drawings
Fig. 1 is the utility model structure diagram.
Specific embodiment
With reference to attached drawing, a kind of SCR denitration on-line regeneration system, it includes SCR reactors 1, air-introduced machine 6, niter
Grey filling slot 10 and heater 11；1 top of SCR reactors is provided with entrance, and bottom is provided with outlet, pacifies on entrance
Equipped with inlet valve 2, outlet valve 3 is installed in outlet, 1 top of SCR reactors is disposed with exhanst gas outlet, bottom side
Smoke inlet is provided with, exhanst gas outlet connects 6 entrance of air-introduced machine by pipeline, and the outlet of air-introduced machine 6 is sequentially connected by pipeline to disappear
Lime filling slot 10, heater 11, then smoke inlet is connected by pipeline；6 entrance of air-introduced machine is also connected by second pipe
Air is connect, and regeneration gas inlet valve 5 is provided on second pipe, air-introduced machine 6 is exported also through third pipeline connection half
Dry method gas approach, and regeneration gas outlet valve 7 is provided on third pipeline.
The SCR reactors 1 form SCR denitration system by entrance, outlet SCR denitration device.
SCR catalyst layer is provided in the SCR reactors 1.
First thermometer 4, second temperature meter 8 and third thermometer 12, the first 4, thermometer are installed on the pipeline
Between SCR reactors 1 and air-introduced machine 6, second temperature meter 8 is between air-introduced machine 6 and calcium hydroxide filling slot 10, third temperature
Meter 12 is 400 DEG C for display pipes temperature between calcium hydroxide filling slot 10 and heater 11.
Flowmeter 9 is also equipped on the pipeline, flowmeter 9 is used between air-introduced machine 6 and calcium hydroxide filling slot 10
Supervise pipeline flow.
The heater 11 uses electric heater, and heat temperature raising is fast, and effect is good, and chain guarantor is provided on electric heater
Protection unit.
The interlock protection device uses thermorelay, and thermorelay is mounted on pipeline, electrical connection
Electric heater, and set controlled at 400 DEG C, when temperature is more than 400 DEG C in thermorelay detection pipeline, control
Stop electric heater, ensure regeneration temperature without departing from 400 DEG C, to the physical of SCR catalyst when avoiding regeneration temperature excessively high
It can damage.
When the utility model is used：
SCR catalyst purges：1 outlet valve 3 of SCR reactors is closed, opens regeneration gas inlet valve 5, opens air inducing
Machine 6 and electric heater 11, air-introduced machine 6 are pumped into air into system, and after heated device 11 heats, the hot-air of flowing is by reactor
Interior flue gas gradually purges out SCR reactors 1, after ten minutes, closes 1 imported valve of SCR reactors and regeneration gas inlet.
SCR catalyst regeneration：Start air-introduced machine 6 and heater 11, open regeneration gas inlet valve 5, air-introduced machine 6 is pumped into
Appropriate air enters system, after flow is up to standard, closes regeneration gas inlet valve 5, gas is twitched in air-introduced machine 6 in system
Under, in system internal circulation flow, after heated device 11 heats, hot gas is circulated to being catalyzed into heating, after 12 hours, heating
To 400 DEG C or so, in this state, the sulphur ammonium and ammonium hydrogen sulfate being attached in SCR catalyst, thermally decomposed and generate SO2 and
NH3, SO2 are adsorbed and removed in calcium hydroxide filling slot 10 by calcium hydroxide, and a NH3 parts are oxidized to oxynitrides NOx,
After being reacted under the reduction of SCR catalyst with NH3, become harmless nitrogen and water, after the completion of regeneration, open regeneration gas
Outlet valve 7, resultant product is passed to semidry method gas approach together after gas and regeneration in system, after close air-introduced machine
6th, 11 regeneration gas inlet valve 5 of heater.
SCR catalyst preheats：Air-introduced machine 6 and heater 11 are opened, cycle hot gas starts to preheat to SCR catalyst, will
After SCR catalyst is warming up to 130 DEG C or more, 1 inlet valve 2 of SCR reactors, outlet valve 3 are opened, air-introduced machine 6 is closed and adds
Hot device 11.
The utility model advantage is reasonable design, simple in structure, is improved in original SCR denitration equipment, structure follows
Ring on-line regeneration system, at low cost, service life is long, simple to operate, and power consumption is low, can avoid some emergency situations pair
The influence of SCR catalyst, without from SCR reactors 1 taking-up, transport and the operation links such as SCR catalyst, efficiency is installed again
It is all improved with safety, effectively avoids caused mechanical loss during SCR catalyst on-line regeneration, renewable number increases
Add, greatly prolong the service life of SCR catalyst.
Claims (7)
1. a kind of SCR denitration on-line regeneration system, which is characterized in that it includes SCR reactors, air-introduced machine, calcium hydroxide
Filling slot and heater；The SCR reactor heads are provided with entrance, and bottom is provided with outlet, be equipped on entrance into
Mouthful valve is equipped with outlet valve in outlet, and SCR reactor heads are disposed with exhanst gas outlet, and bottom side is provided with cigarette
Gas entrance, exhanst gas outlet by pipeline connect air-introduced machine entrance, air-introduced machine outlet by pipeline be sequentially connected calcium hydroxide filling slot,
Heater, then smoke inlet is connected by pipeline；The air-introduced machine entrance also connects air by second pipe, and in the second pipe
It is provided with regeneration gas inlet valve on road, air-introduced machine outlet also connects semidry method gas approach by third pipeline, and the
Regeneration gas outlet valve is provided on three pipelines.
2. a kind of SCR denitration on-line regeneration system according to claim 1, it is characterized in that the SCR reactors
By entrance, outlet SCR denitration device, SCR denitration system is formed.
3. a kind of SCR denitration on-line regeneration system according to claim 2, it is characterized in that the SCR reactors
Inside it is provided with SCR catalyst layer.
4. a kind of SCR denitration on-line regeneration system according to claim 1, it is characterized in that being installed on the pipeline
There are the first thermometer, second temperature meter and third thermometer, the first thermometer is between SCR reactors and air-introduced machine, and
Two thermometers are between air-introduced machine and calcium hydroxide filling slot, and third thermometer is between calcium hydroxide filling slot and heater.
5. a kind of SCR denitration on-line regeneration system according to claim 1, it is characterized in that also pacifying on the pipeline
Equipped with flowmeter, flowmeter is between air-introduced machine and calcium hydroxide filling slot.
6. a kind of SCR denitration on-line regeneration system according to claim 1, it is characterized in that the heater uses
Electric heater, and interlock protection device is provided on electric heater.
7. a kind of SCR denitration on-line regeneration system according to claim 6, it is characterized in that the interlock protection fills
It puts using thermorelay, thermorelay is mounted on pipeline, is electrically connected electric heater, and sets control temperature
It is 400 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721510610.1U CN207507493U (en) | 2017-11-14 | 2017-11-14 | A kind of SCR denitration on-line regeneration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721510610.1U CN207507493U (en) | 2017-11-14 | 2017-11-14 | A kind of SCR denitration on-line regeneration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207507493U true CN207507493U (en) | 2018-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721510610.1U Active CN207507493U (en) | 2017-11-14 | 2017-11-14 | A kind of SCR denitration on-line regeneration system |
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| Country | Link |
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| CN (1) | CN207507493U (en) |
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2017
- 2017-11-14 CN CN201721510610.1U patent/CN207507493U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 200125, room 3, floor 3, building 3601, 305 Dongfang Road, Shanghai, Pudong New Area Patentee after: Shanghai Taixin Environmental Engineering Co., Ltd Address before: 200125, room 3, floor 3, building 3601, 305 Dongfang Road, Shanghai, Pudong New Area Patentee before: Shanghai Taixin environmental engineering Limited by Share Ltd |
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| CP01 | Change in the name or title of a patent holder |