CN207036795U - A kind of SCR flue gas denitration reactors section subregion flue gas sampler - Google Patents
A kind of SCR flue gas denitration reactors section subregion flue gas sampler Download PDFInfo
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- CN207036795U CN207036795U CN201720647357.8U CN201720647357U CN207036795U CN 207036795 U CN207036795 U CN 207036795U CN 201720647357 U CN201720647357 U CN 201720647357U CN 207036795 U CN207036795 U CN 207036795U
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Abstract
A kind of SCR flue gas denitration reactors section subregion flue gas sampler, including multigroup boundling flue gas sampling pipe (1), flue gas mixing sampling box (2), sampling scavenging conduit (3), sampling exhaust tube (4), smoke components monitor (5).The smoke collecting region of every group of boundling flue gas sampling pipe is corresponding with SCR reactors upstream subregion spray ammonia regulating valve；Every group of boundling flue gas sampling pipe is made up of the sampling tubule (6) for going deep into reactor section different depth, and boundling flue gas sampling pipe is connected with flue gas mixing sampling box, and sampling scavenging conduit, sampling exhaust tube connect respectively at flue gas mixing sampling box.The utility model sampling apparatus, realize the sampling of smoke components subregion and monitoring of SCR denitration reactor big cross section, it is corresponding with subregion spray ammonia manual modulation valve, optimized and revised applied to coal-burning boiler SCR spray ammonia, can solve the problems, such as Benitration reactor big cross section sampling monitoring, improve the specific aim and regulation efficiency of spray ammonia regulation.
Description
Technical field
It the utility model is related to a kind of SCR flue gas denitration reactors section subregion flue gas sampler, the combustion of category coal-burning power plant
Gas detection technique field.
Background technology
For control coal-burning power plant's atmosphere pollution nitrogen oxides (NOx) discharge, selective catalytic reduction (SCR) be most into
Denitration technology that is ripe, being most widely used.The principle of SCR denitrating flue gas is under catalyst action, and reduction is sprayed into flue gas
Agent (NH3), the NOx in flue gas is catalysed and reduced into N2 and H2O, because Benitration reactor area is big, flue gas flow is big, flow velocity
Height, the ammonia of penetrating and the NOx in flue gas be difficult to it is uniform mix, during denitration catalyst, whole Benitration reactor spray ammonia is total
Amount regulation relies primarily on the NOx monitor value feedback controls of single flue gas sampling measurement point in back-end ductwork, and monitor value is to whole anti-
Answer the NH3 excess that the representativeness of NOx content in device flue gas is not strong, and the NH3 contents locally sprayed into are inadequate, locally sprays into.Unit is transported
Between the departure date, substantial amounts of flue dust easily deposits in flue gas, causes uneven Benitration reactor flow field, catalyst life decline, dust stratification tight
Weight, denitration efficiency decline, and denitration efficiency regulating measure is extremely limited, and to ensure that concentration of emission is up to standard, " spraying ammonia " is most common more
Regulating measure, " the escaping of ammonia " is almost in all coal-burning boilers " occurring " or " will occur ".
Because Benitration reactor cross-sectional area is big, spray ammonia regulation main valve can only control the spray ammonia total amount into reactor, be
Make spray ammonia uniform, SCR spray ammonia system generally arranges multiple manual modulation valves, each SCR reactors in reactor upstream flue
Upstream subregion spray ammonia manual modulation valve corresponds mainly to reactor regional area ammonia spraying amount.Carry out different subregions flue gas in NOx into
Divide measurement, for adjusting corresponding subregion spray ammonia control valve opening, be advantageously implemented the spray ammonia optimization of Benitration reactor, raising denitration
The gametic fertility efficiency of system, reduce and eliminate the generation of " the escaping of ammonia ".
Cigarette in conventional spray ammonia Optimum Experiment at present, mainly gridding method monitoring SCR denitration reactor outlet casing coupling flue
Gas NOx is distributed, and reactor upstream spray ammonia manual modulation valve is adjusted on this basis, due to about 20 squares of exhaust pass area
Rice, more than 200 square metres of Benitration reactor area, reactor outlet casing coupling flue gas in flue NOx concentration distribution, with denitration reaction
There is huge difference in the NOx concentration distribution in device, when flue gas flow to casing coupling flue by Benitration reactor, flue gas has occurred and that
It is sufficiently mixed, flue gas NOx uniform concentration distribution can not reflect in Benitration reactor that NOx concentration is distributed equal in flue gas in flue
Even property, therefore spray ammonia Optimum Experiment is carried out according to Benitration reactor exhaust pass NOx distributions and technological essence defect be present, effect is not
It is good, it is inefficient.
The content of the invention
The purpose of this utility model is, in order to solve the problems, such as Benitration reactor big cross section sampling monitoring, improves spray ammonia regulation
Specific aim and regulation efficiency, the utility model proposes a kind of SCR flue gas denitration reactors section subregion flue gas sampler.
The technical solution of the utility model is as follows：A kind of SCR flue gas denitration reactors section subregion flue gas sampler, bag
Include multigroup boundling flue gas sampling pipe, flue gas mixing sampling box, exhaust gas components monitor, the suction pump of big flow flue gas, denitration reaction
Device, flue gas spoiler, sampling scavenging conduit, blow down valve, sampling exhaust tube, sampling tubule, sampling extraction valve and fume emission valve.
The smoke collecting region of boundling flue gas sampling pipe described in every group and SCR reactors upstream subregion spray ammonia regulating valve pair
Should；Every group of boundling flue gas sampling pipe is made up of the sampling tubule for going deep into reactor section different depth, boundling flue gas sampling pipe with
Flue gas mixing sampling box is connected；Flue gas mixing sampling box is arranged on denitration reaction wall, by shell and the flue gas flow-disturbing of inside
Plate forms.
Described blow down valve one end passes through pipeline communication flue gas mixing sampling box；The other end of the blow down valve is soft by purging
Pipe is connected with compressed air source.
One end of the sampling extraction valve is connected by pipeline with flue gas mixing sampling box, described to sample the another of extraction valve
End is connected with big flow flue gas suction pump；The fume sample of extraction is partly into flue gas analyzer and carries out analysis detection；Extract
Other fume samples discharged by fume emission valve.
The beneficial effects of the utility model are that the structure that the utility model uses realizes SCR denitration reactor big cross section
Smoke components subregion sampling and monitoring, with subregion spray ammonia manual modulation valve it is corresponding, applied to coal-burning boiler SCR spray ammonia optimization tune
It is whole, solve the problems, such as Benitration reactor big cross section sampling monitoring, improve the specific aim and regulation efficiency of spray ammonia regulation.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
In figure, 1 is boundling flue gas sampling pipe；2 be flue gas mixing sampling box；3 be sampling scavenging conduit；4 be sampling exhaust tube；
5 be exhaust gas components monitor；6 be sampling tubule；7 be Benitration reactor；8 be flue gas spoiler；9 be blow down valve；10 be sampling
Extraction valve；11 be fume emission valve；12 be purging flexible pipe；13 be compressed air；14 be big flow flue gas suction pump.
Embodiment
Fig. 1 is structural representation of the present utility model.
As illustrated, a kind of SCR flue gas denitration reactors section subregion flue gas sampler of the present embodiment, including multigroup collection
Beam flue gas sampling pipe 1, flue gas mixing sampling box 2, sampling scavenging conduit 3, sampling exhaust tube 4, smoke components monitor 5, big flow
Flue gas suction pump 14 etc..The smoke collecting region of every group of boundling flue gas sampling pipe and SCR reactors upstream subregion spray ammonia regulating valve
It is corresponding；Every group of boundling flue gas sampling pipe 1 is made up of the sampling tubule 6 for going deep into the section different depth of Benitration reactor 7, boundling flue gas
Sampling pipe 1 is connected with flue gas mixing sampling box 2, and sampling scavenging conduit 3, sampling exhaust tube 4 connect respectively at flue gas mixing sampling box.
Boundling flue gas sampling pipe 1 is made up of the sampling tubule 6 for going deep into reactor section different depth, and each tubule 6 that samples is hollow structure,
For one end open below denitrification catalyst module, the other end is opened on the flue gas mixing sampling being connected with boundling flue gas sampling pipe 1
Case 2.Flue gas mixing sampling box 2 is arranged on the wall of Benitration reactor 7, is made up of the flue gas spoiler 8 of shell and inside.
A kind of SCR flue gas denitration reactors section subregion flue gas sampler sampled measurements step of the present embodiment is：
(1) before sampling, compressed air 13 is connected with sampling scavenging conduit flexible pipe 12, is opened blow down valve 9, is utilized compressed air pair
Mix sampling box 2, boundling flue gas sampling pipe 1 carries out reverse blow.
(2) blow down valve 9 is closed, sampling extraction valve 10 is opened, starts big flow flue gas suction pump 14, carry out flue gas sampling,
The fume sample that part is extracted carries out analysis detection into flue gas analyzer 5, and unnecessary flue gas discharges from fume emission valve 11.
(3) amount of NOx of detection reflects the mixed flue gas composition of the flue gas sampler corresponding region, is sprayed with the region
When ammonia manual modulation valve is correspondingly adjusted, it can be applied to coal-burning boiler SCR spray ammonia and optimize and revise.
Claims (3)
1. a kind of SCR flue gas denitration reactors section subregion flue gas sampler, including multigroup boundling flue gas sampling pipe, flue gas mix
Close sampling box, exhaust gas components monitor, the suction pump of big flow flue gas, Benitration reactor, flue gas spoiler, sampling scavenging conduit, blow
Sweep valve, sampling exhaust tube, sampling tubule, sampling extraction valve and fume emission valve；Characterized in that,
The smoke collecting region of boundling flue gas sampling pipe described in every group is corresponding with SCR reactors upstream subregion spray ammonia regulating valve；Often
Group boundling flue gas sampling pipe is made up of the sampling tubule for going deep into reactor section different depth, and boundling flue gas sampling pipe mixes with flue gas
Sampling box is closed to be connected；Flue gas mixing sampling box is arranged on denitration reaction wall, is made up of the flue gas spoiler of shell and inside.
2. a kind of SCR flue gas denitration reactors section subregion flue gas sampler according to claim 1, its feature exist
In described blow down valve one end passes through pipeline communication flue gas mixing sampling box；The other end of the blow down valve by purge flexible pipe with
Compressed air source is connected.
3. a kind of SCR flue gas denitration reactors section subregion flue gas sampler according to claim 1, its feature exist
In, it is described sampling extraction valve one end connected by pipeline with flue gas mixing sampling box, it is described sample extraction valve the other end and
Big flow flue gas suction pump is connected；The fume sample of extraction is partly into flue gas analyzer and carries out analysis detection；Extract its
Its fume sample is discharged by fume emission valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720647357.8U CN207036795U (en) | 2017-06-06 | 2017-06-06 | A kind of SCR flue gas denitration reactors section subregion flue gas sampler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720647357.8U CN207036795U (en) | 2017-06-06 | 2017-06-06 | A kind of SCR flue gas denitration reactors section subregion flue gas sampler |
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| CN207036795U true CN207036795U (en) | 2018-02-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108344604A (en) * | 2018-04-11 | 2018-07-31 | 华南理工大学 | A kind of SCR reative cells NOXThe online data-logger of concentration and control method |
| CN109603525A (en) * | 2018-12-27 | 2019-04-12 | 浙江浙能温州发电有限公司 | A kind of denitration subregion spray ammonia control method based on unevenness judgement |
| CN112221323A (en) * | 2020-08-11 | 2021-01-15 | 华电电力科学研究院有限公司 | NOx partition measuring method based on flow velocity weighting |
-
2017
- 2017-06-06 CN CN201720647357.8U patent/CN207036795U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108344604A (en) * | 2018-04-11 | 2018-07-31 | 华南理工大学 | A kind of SCR reative cells NOXThe online data-logger of concentration and control method |
| CN109603525A (en) * | 2018-12-27 | 2019-04-12 | 浙江浙能温州发电有限公司 | A kind of denitration subregion spray ammonia control method based on unevenness judgement |
| CN109603525B (en) * | 2018-12-27 | 2023-11-03 | 浙江浙能温州发电有限公司 | Denitration partition ammonia spraying control method based on non-uniformity judgment |
| CN112221323A (en) * | 2020-08-11 | 2021-01-15 | 华电电力科学研究院有限公司 | NOx partition measuring method based on flow velocity weighting |
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