CN205392185U - Gas boiler catalytic denitrification system - Google Patents
Gas boiler catalytic denitrification system Download PDFInfo
- Publication number
- CN205392185U CN205392185U CN201620131576.6U CN201620131576U CN205392185U CN 205392185 U CN205392185 U CN 205392185U CN 201620131576 U CN201620131576 U CN 201620131576U CN 205392185 U CN205392185 U CN 205392185U
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- flue gas
- temperature flue
- outlet
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- boiler
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Abstract
The utility model discloses a can discharge the catalytic denitrification system that NOx in the flue gas carries out effective denitration treatment to gas boiler. Gas boiler's afterbody low temperature exhanst gas outlet meets with low temperature flue gas pipeline's entry, on gas boiler, high -temperature exhaust gas outlet has been seted up in high temperature flue gas region for above the combustor, high -temperature exhaust gas outlet meets with high temperature flue gas pipeline's entry, high temperature flue gas pipeline's export is met with the entry that low temperature flue gas pipeline's export joins back and mixing duct mutually, mixing duct's export divides two the tunnel, meet via the entry of input pipeline with the SCR reactor all the way, another way meets with the entry of bypass pipeline, the export of SCR reactor is met with output pipeline's entry, output pipeline's export is met with the entry that the export of bypass pipeline converges back and discharge tube mutually, the jet of seting up on the high temperature flue gas pipeline meets with urea solution preparation injection system's delivery outlet.
Description
Technical field
This utility model relates to a kind of gas fired-boiler catalytic denitration system, belongs to gas denitrifying technology field.
Background technology
The nineties, after people recognize that coal-burning boiler can bring more serious atmospheric pollution, the most big and medium-sized cities of China by coal-fired boiler reform for gas fired-boiler.Gas fired-boiler is primarily referred to as with natural gas for fuel, for heat supply heating or the Industrial Boiler providing domestic hot-water.At modifying coal-fired boiler at that time, the requirement of the discharged nitrous oxides of gas fired-boiler is not high, the nitrogen oxides of discharge is not carried out the design of any denitration process by improved gas fired-boiler mostly.
Nowadays, in the face of happening occasionally of haze weather, administer to be pushed further into atmosphere quality, particularly northern heating area, gas fired-boiler progressively have employed the fume treatment technology of advanced person to process the emission problem of nitrogen oxides, solves local haze weather, improves air quality.But, current improved gas fired-boiler, the discharged nitrous oxides concentration in its flue gas lies substantially in 90～200mg/m3Between, with present stage, the discharged nitrous oxides concentration index of gas fired-boiler is also far apart, particularly Beijing.As can be seen here, the research of the discharged nitrous oxides treatment technology of gas fired-boiler is imperative.
Utility model content
The purpose of this utility model is in that to provide a kind of gas fired-boiler catalytic denitration system, and gas fired-boiler effectively can be discharged the NO in flue gas by itxCarrying out denitration process, denitration efficiency is high.
To achieve these goals, this utility model have employed techniques below scheme:
nullA kind of gas fired-boiler catalytic denitration system，It is characterized in that: it includes urea liquid and prepares spraying system、SCR reactor，Wherein: the afterbody low-temperature flue gas outlet of gas fired-boiler connects with the entrance of low-temperature flue gas pipeline，On gas fired-boiler，High-temperature flue gas outlet is offered relative to the high-temperature flue gas region above burner，High-temperature flue gas outlet connects with the entrance of high-temperature flue gas pipeline，The outlet of high-temperature flue gas pipeline connects with the entrance of mixing duct after converging mutually with the outlet of low-temperature flue gas pipeline，The outlet of mixing duct divides two-way，One tunnel connects via the entrance of input channel with SCR reactor，Another road connects with the entrance of bypass duct，The outlet of SCR reactor connects with the entrance of output channel，The outlet of output channel connects with the entrance of discharge tube after converging mutually with the outlet of bypass duct，The jet offered on high-temperature flue gas pipeline is prepared the delivery outlet of spraying system and is connected with urea liquid，The exit of high-temperature flue gas pipeline is provided with high-temperature flue gas and regulates valve，Main road gas baffle door is installed in input channel，Bypass gas baffle door is installed in bypass duct，Neat stress baffle door is installed in output channel.
The utility model has the advantages that:
1, gas fired-boiler effectively can be discharged the NO in flue gas by this utility modelxCarrying out denitration process, denitration efficiency is high, is finally discharged into the NO in airxContent meets country's relevant emission standards now.
2, the urea liquid safety used in this utility model is high, without any potential safety hazard.
3, this utility model uses common denitrating catalyst, and denitration reaction speed is fast, and denitration cost is low.Denitrating catalyst is stricter to temperature requirement, it is generally 290 DEG C～410 DEG C, when gas fired-boiler load is lower than 50%, the flue-gas temperature of its afterbody output cannot meet the temperature conditions that SCR reactor requires, and structural design of the present utility model ensure that the flue-gas temperature entering SCR reactor can meet the temperature conditions needed for SCR reactor, so that it is guaranteed that being normally carried out of denitration reaction.
4, this utility model automaticity is high, it is not necessary to manually participates in, has been truly realized " unmanned ".
5, this utility model stable and reliable operation, long service life.
Accompanying drawing explanation
Fig. 1 is composition schematic diagram of the present utility model.
Detailed description of the invention
nullSuch as Fig. 1，This utility model gas fired-boiler catalytic denitration system includes urea liquid and prepares spraying system 20、SCR reactor 40，Wherein: the afterbody low-temperature flue gas outlet of gas fired-boiler 10 connects with the entrance of low-temperature flue gas pipeline 32，On gas fired-boiler 10，High-temperature flue gas outlet is offered relative to the high-temperature flue gas region above burner 70，High-temperature flue gas outlet connects with the entrance of high-temperature flue gas pipeline 31，The outlet of high-temperature flue gas pipeline 31 connects with the entrance of mixing duct 33 after converging mutually with the outlet of low-temperature flue gas pipeline 32，The outlet of mixing duct 33 divides two-way，One tunnel connects via the entrance of input channel 34 with SCR reactor 40，Another road connects with the entrance of bypass duct 36，The outlet of SCR reactor 40 connects with the entrance of output channel 35，The outlet of output channel 35 connects with the entrance of discharge tube 37 after converging mutually with the outlet of bypass duct 36，The outlet of discharge tube 37 and atmosphere，The jet offered on high-temperature flue gas pipeline 31 is prepared the delivery outlet of spraying system 20 and is connected with urea liquid，The exit of high-temperature flue gas pipeline 31 is provided with high-temperature flue gas and regulates valve 61，Main road gas baffle door 62 is installed in input channel 34，Bypass gas baffle door 63 is installed in bypass duct 36，Neat stress baffle door 64 is installed in output channel 35.
In actual design, urea liquid prepares spraying system 20 can include urea liquid storage tank, carbamide delivery pump and two-fluid spray gun, and the delivery outlet of urea liquid storage tank connects via the input port of carbamide delivery pump with the two-fluid spray gun at the jet place being placed in high-temperature flue gas pipeline 31.Two-fluid spray gun mixes with high-temperature flue gas for being sprayed in high-temperature flue gas pipeline 31 with Sprayable by the urea liquid prepared, and pyrolytic reaction occurs.
As Fig. 1, SCR reactor 40 can include housing (not marking in figure), wherein: from the entrance of housing to outlet, it is sequentially provided with in housing at a distance of the flue gas rectification and guide device 41 of setpoint distance, catalytic denitration device 42.In actual design, the space that other device is set in housing, can be reserved with.
In actual design, being provided with a pull-up denox catalyst in catalytic denitration device 42, denitrating catalyst adopts common denitrating catalyst known in the art, also should take into full account the indemnifying measure of thermal expansion when reality is implemented simultaneously.
In reality is implemented, such as Fig. 1, one pressure detection sensor (not marking in figure) respectively can be set in catalytic denitration device 42 both sides, two pressure detection sensors connect with pressure reduction analyser 43, by the analysis to catalytic denitration device 42 both sides pressure reduction, the service condition of denitrating catalyst can be judged, with timely replacing.
Such as Fig. 1, it is preferred that, in discharge tube 37, energy-saving appliance 50 can be installed, the heat energy outlet of energy-saving appliance 50 connects with the heat energy entrance of gas fired-boiler 10, to realize the purpose that gas fired-boiler 10 is energy-conservation, lower consumption.
When reality is implemented, mixing duct 33 can be provided with NOxConcentration detection sensor, temperature detection sensor, flue gas oxygen content detection sensor, output channel 35 can be provided with NO simultaneouslyxConcentration detection sensor, the escaping of ammonia rate detection sensor.
This utility model can design denitration robot control system(RCS) (not shown), and denitration robot control system(RCS) can adopt PLC to realize, and whole denitrification process is monitored by it.Specifically, urea liquid prepares spraying system 20, high-temperature flue gas adjustment valve 61, main road gas baffle door 62, bypass gas baffle door 63, neat stress baffle door 64, NOxConcentration detection sensor, temperature detection sensor, flue gas oxygen content detection sensor, the escaping of ammonia rate detect the signal port of sensor and connect with the corresponding signal port of denitration robot control system(RCS) respectively.
In actual motion, pass through NOxThe concentration detection sensor NO to the entrance of SCR reactor 40, exitxConcentration of emission detects, the real-time monitoring to this utility model denitration efficiency can be realized, thus according to actual operating state and temperature detection sensor the testing result etc. to high-temperature flue-gas, by denitration robot control system(RCS) control urea liquid prepare spraying system 20 spray the emitted dose of urea liquid, high-temperature flue gas regulate valve 61 opening degree etc..
In this utility model, gas fired-boiler 10, burner 70, energy-saving appliance 50 etc. are the existing device of this area, and urea liquid prepares spraying system 20 for system known in the art, therefore their concrete composition does not here describe in detail.
Such as Fig. 1, work process of the present utility model is:
The low-temperature flue gas of the afterbody low-temperature flue gas outlet drain of gas fired-boiler 10 150 DEG C～200 DEG C, the high-temperature flue gas that high-temperature flue gas outlet drain is 500 DEG C～600 DEG C, simultaneously, urea liquid is prepared spraying system 20 and is spurted in high-temperature flue gas pipeline 31 by two-fluid spray gun by urea liquid, and urea liquid pyrolysis under the high temperature conditions produces NH3(ammonia of dilution), then with NH3High-temperature flue gas mix in mixing duct 33 with low-temperature flue gas, be warming up to the temperature range (290 DEG C～410 DEG C) required by SCR reactor 40 and enter SCR reactor 40 afterwards.In SCR reactor 40, after flue gas rectification and guide device 41 mix homogeneously, under the denitrating catalyst effect in catalytic denitration device 42, NH3With the NO in intensification flue gasxCarry out reduction reaction, make NO harmful in flue gasxBecome harmless N2And H2Discharging the neat stress meeting country's relevant emission standards after O, then neat stress is discharged into air from discharge tube 37 after energy-saving appliance 50 heat exchange, completes denitrating flue gas process.
nullWhen the flue-gas temperature entered in mixing duct 33 does not meet the temperature conditions that SCR reactor 40 requires，Denitration robot control system(RCS) controls main road gas baffle door 62 and closes、Neat stress baffle door 64 is closed、Bypass gas baffle door 63 is opened，Then the flue gas not meeting the temperature required condition of SCR reactor 40 is directly discharged from discharge tube 37 via bypass duct 36，Without entering SCR reactor 40 to affect the normal use of SCR reactor 40，Effectively extend the service life of SCR reactor 40，Meanwhile，Denitration robot control system(RCS) controls high-temperature flue gas and regulates the opening degree of valve 61 and the emitted dose of urea liquid，Regulate the flue-gas temperature entered in mixing duct 33，Comply with the temperature conditions that SCR reactor 40 requires，Then control main road gas baffle door 62 and neat stress baffle door 64 is opened、Bypass gas baffle door 63 is closed，Make flue gas be again introduced into SCR reactor 40 and carry out denitration process，Then neat stress is discharged in air.
The utility model has the advantages that:
1, gas fired-boiler effectively can be discharged the NO in flue gas by this utility modelxCarrying out denitration process, denitration efficiency is high, is finally discharged into the NO in airxContent meets country's relevant emission standards now.
2, the urea liquid safety used in this utility model is high, without any potential safety hazard.
3, this utility model uses common denitrating catalyst, and denitration reaction speed is fast, and denitration cost is low.Denitrating catalyst is stricter to temperature requirement, it is generally 290 DEG C～410 DEG C, when gas fired-boiler load is lower than 50%, the flue-gas temperature of its afterbody output cannot meet the temperature conditions that SCR reactor requires, and structural design of the present utility model ensure that the flue-gas temperature entering SCR reactor can meet the temperature conditions needed for SCR reactor, so that it is guaranteed that being normally carried out of denitration reaction.
4, this utility model automaticity is high, it is not necessary to manually participates in, has been truly realized " unmanned ".
5, this utility model stable and reliable operation, long service life.
The above is preferred embodiment of the present utility model and the know-why used thereof; for a person skilled in the art; when without departing substantially from spirit and scope of the present utility model; any based on apparent changes such as the equivalent transformation on technical solutions of the utility model basis, simple replacements, belong within this utility model protection domain.
Claims (7)
- null1. a gas fired-boiler catalytic denitration system，It is characterized in that: it includes urea liquid and prepares spraying system、SCR reactor，Wherein: the afterbody low-temperature flue gas outlet of gas fired-boiler connects with the entrance of low-temperature flue gas pipeline，On gas fired-boiler，High-temperature flue gas outlet is offered relative to the high-temperature flue gas region above burner，High-temperature flue gas outlet connects with the entrance of high-temperature flue gas pipeline，The outlet of high-temperature flue gas pipeline connects with the entrance of mixing duct after converging mutually with the outlet of low-temperature flue gas pipeline，The outlet of mixing duct divides two-way，One tunnel connects via the entrance of input channel with SCR reactor，Another road connects with the entrance of bypass duct，The outlet of SCR reactor connects with the entrance of output channel，The outlet of output channel connects with the entrance of discharge tube after converging mutually with the outlet of bypass duct，The jet offered on high-temperature flue gas pipeline is prepared the delivery outlet of spraying system and is connected with urea liquid，The exit of high-temperature flue gas pipeline is provided with high-temperature flue gas and regulates valve，Main road gas baffle door is installed in input channel，Bypass gas baffle door is installed in bypass duct，Neat stress baffle door is installed in output channel.
- 2. gas fired-boiler catalytic denitration system as claimed in claim 1, it is characterised in that:Described urea liquid is prepared spraying system and is included urea liquid storage tank, carbamide delivery pump and two-fluid spray gun, and the delivery outlet of urea liquid storage tank connects via the input port of carbamide delivery pump with the two-fluid spray gun at the jet place being placed in described high-temperature flue gas pipeline.
- 3. gas fired-boiler catalytic denitration system as claimed in claim 1, it is characterised in that:Described SCR reactor includes housing, wherein: from the entrance of housing to outlet, is sequentially provided with at a distance of the flue gas rectification and guide device of setpoint distance, catalytic denitration device in housing.
- 4. gas fired-boiler catalytic denitration system as claimed in claim 3, it is characterised in that:A pull-up denox catalyst it is provided with in described catalytic denitration device.
- 5. gas fired-boiler catalytic denitration system as claimed in claim 1, it is characterised in that:Being provided with energy-saving appliance in described discharge tube, the heat energy outlet of energy-saving appliance connects with the heat energy entrance of described gas fired-boiler.
- 6. the gas fired-boiler catalytic denitration system as according to any one of claim 1 to 5, it is characterised in that:Described mixing duct is provided with NOxConcentration detection sensor, temperature detection sensor, flue gas oxygen content detection sensor, described output channel is provided with NOxConcentration detection sensor, the escaping of ammonia rate detection sensor.
- 7. gas fired-boiler catalytic denitration system as claimed in claim 6, it is characterised in that:Described urea liquid prepares spraying system, described high-temperature flue gas regulates valve, described main road gas baffle door, described bypass gas baffle door, described neat stress baffle door, described NOxConcentration detection sensor, described temperature detection sensor, described flue gas oxygen content detection sensor, described the escaping of ammonia rate detect the signal port of sensor and connect with the corresponding signal port of denitration robot control system(RCS) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620131576.6U CN205392185U (en) | 2016-02-19 | 2016-02-19 | Gas boiler catalytic denitrification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620131576.6U CN205392185U (en) | 2016-02-19 | 2016-02-19 | Gas boiler catalytic denitrification system |
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| CN205392185U true CN205392185U (en) | 2016-07-27 |
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| CN201620131576.6U Expired - Fee Related CN205392185U (en) | 2016-02-19 | 2016-02-19 | Gas boiler catalytic denitrification system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151007A (en) * | 2016-08-31 | 2016-11-23 | 广西玉柴机器股份有限公司 | The test device of ejector pump accuracy of spray |
| CN106524219A (en) * | 2016-12-19 | 2017-03-22 | 大连圣鼎工业装备有限公司 | Environment-friendly automatic control low-index emission gas boiler unit |
| CN106540543A (en) * | 2017-01-17 | 2017-03-29 | 启迪桑德环境资源股份有限公司 | A kind of multiple pass type selective catalytic reduction denitration device |
| CN107649185A (en) * | 2017-10-25 | 2018-02-02 | 无锡华光新动力环保科技股份有限公司 | A kind of catalyst thermal regeneration devices and methods therefor |
| CN108499338A (en) * | 2018-04-04 | 2018-09-07 | 成都达奇环境科技有限公司 | A kind of denitrification apparatus |
| CN108607358A (en) * | 2018-05-08 | 2018-10-02 | 湖南大唐节能科技有限公司 | A kind of full load denitrification apparatus having urea smoke gas pyrolysis function |
| CN108744970A (en) * | 2017-07-24 | 2018-11-06 | 深圳市中兰环保科技股份有限公司 | A kind of combined denitration system of gas fired-boiler and biogas internal combustion engine |
| CN110237708A (en) * | 2019-07-09 | 2019-09-17 | 北京工业大学 | One kind being used for combustion gas furnace exhaust gas NOXThe method and apparatus of processing |
| CN110585923A (en) * | 2019-09-11 | 2019-12-20 | 上海发电设备成套设计研究院有限责任公司 | Diesel engine tail gas afterburning flue gas denitration system and method |
| CN111271721A (en) * | 2019-11-19 | 2020-06-12 | 浙江浩普环保工程有限公司 | System and method for enhancing efficiency of flue gas denitration by using ozone |
| CN113828152A (en) * | 2021-10-15 | 2021-12-24 | 中国船舶工业集团公司第七0八研究所 | Low-temperature SCR device and method for marine low-sulfur fuel oil |
-
2016
- 2016-02-19 CN CN201620131576.6U patent/CN205392185U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151007A (en) * | 2016-08-31 | 2016-11-23 | 广西玉柴机器股份有限公司 | The test device of ejector pump accuracy of spray |
| CN106524219A (en) * | 2016-12-19 | 2017-03-22 | 大连圣鼎工业装备有限公司 | Environment-friendly automatic control low-index emission gas boiler unit |
| CN106540543A (en) * | 2017-01-17 | 2017-03-29 | 启迪桑德环境资源股份有限公司 | A kind of multiple pass type selective catalytic reduction denitration device |
| CN106540543B (en) * | 2017-01-17 | 2022-12-02 | 启迪环境科技发展股份有限公司 | Multi-pass selective catalytic reduction denitration device |
| CN108744970A (en) * | 2017-07-24 | 2018-11-06 | 深圳市中兰环保科技股份有限公司 | A kind of combined denitration system of gas fired-boiler and biogas internal combustion engine |
| CN107649185A (en) * | 2017-10-25 | 2018-02-02 | 无锡华光新动力环保科技股份有限公司 | A kind of catalyst thermal regeneration devices and methods therefor |
| CN108499338A (en) * | 2018-04-04 | 2018-09-07 | 成都达奇环境科技有限公司 | A kind of denitrification apparatus |
| CN108607358A (en) * | 2018-05-08 | 2018-10-02 | 湖南大唐节能科技有限公司 | A kind of full load denitrification apparatus having urea smoke gas pyrolysis function |
| CN110237708A (en) * | 2019-07-09 | 2019-09-17 | 北京工业大学 | One kind being used for combustion gas furnace exhaust gas NOXThe method and apparatus of processing |
| CN110585923A (en) * | 2019-09-11 | 2019-12-20 | 上海发电设备成套设计研究院有限责任公司 | Diesel engine tail gas afterburning flue gas denitration system and method |
| CN111271721A (en) * | 2019-11-19 | 2020-06-12 | 浙江浩普环保工程有限公司 | System and method for enhancing efficiency of flue gas denitration by using ozone |
| CN113828152A (en) * | 2021-10-15 | 2021-12-24 | 中国船舶工业集团公司第七0八研究所 | Low-temperature SCR device and method for marine low-sulfur fuel oil |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160727 Termination date: 20180219 |
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| CF01 | Termination of patent right due to non-payment of annual fee |