CN208975538U - A kind of combined denitration system of gas fired-boiler and biogas internal combustion engine - Google Patents
A kind of combined denitration system of gas fired-boiler and biogas internal combustion engine Download PDFInfo
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- CN208975538U CN208975538U CN201821022799.4U CN201821022799U CN208975538U CN 208975538 U CN208975538 U CN 208975538U CN 201821022799 U CN201821022799 U CN 201821022799U CN 208975538 U CN208975538 U CN 208975538U
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Abstract
The utility model provides the combined denitration system of a kind of gas fired-boiler and biogas internal combustion engine, it includes that SCR reactor, flue gas monitoring module, control module, reducing agent supplying module, compressed air auxiliary supplying module and smoke-intake pipe road, the smoke discharging pipe of the gas fired-boiler, the smoke discharging pipe of biogas internal combustion engine are connect with smoke-intake pipe road；The compressed air auxiliary supplying module is connect with reducing agent supplying module, provides compressed air；The reducing agent supplying module is exported equipped with reducing agent, and the reducing agent outlet is connect with the entrance of SCR reactor, smoke-intake pipe road；The probe of the flue gas monitoring module is located at the entrance of the outlet of SCR reactor, smoke-intake pipe road；The reducing agent supplying module, flue gas monitoring module are connect with control module respectively.The technical solution of the utility model, forms combined denitration system, and the formula investing relative to one-to-one denitration device is small, it is only necessary to which a set of denitration device saves space occupied, and equipment operation operation is more convenient.
Description
Technical field
The utility model belongs to fume treatment field, is related to the combined denitration system of a kind of gas fired-boiler and biogas internal combustion engine
System carries out the fume treatment of gas-to electricity to the biogas of generation using biogas internal combustion engine especially in fixed-end forces project.
Background technique
For carrying out the fixed-end forces project of gas-to electricity using biogas internal combustion engine generator group, as the landfill gas of landfill yard is sent out
Electricity and anaerobic fermentation of kitchen waste be for biogas use in power generation etc., this intermediate item in addition to the waste heat to generating set utilizes,
Situations such as in view of compressor emergency shutdown, can generally configure gas fired-boiler simultaneously.Continuous stringent with environmental requirement, some areas are right
It requires in the discharge index of generating set and the NOx of gas fired-boiler in 150mg/Nm3(5%O2) below.For same project, such as
Denitration device is respectively arranged to generating set and gas fired-boiler in fruit, and not only investment is big, since gas fired-boiler generating set stops
Spare heating equipment when machine is separately provided and a set of denitration device is arranged for boiler, and the denitration device is in the normal work of generating set
Idle state will be chronically under making.Meanwhile two sets of denitration devices being installed and are taken up a large area, while needing that two stacks are arranged,
The case where certain plant area's limited spaces, cannot achieve.In this case, it is contemplated that by the flue of generating set and combustion gas
The flue of boiler enters a set of denitration device after merging and carries out denitration process.
Utility model content
Against the above technical problems, the utility model discloses the combined denitration systems of a kind of gas fired-boiler and biogas internal combustion engine
System is not needed to internal combustion engine group and the one-to-one arrangement denitration device of gas fired-boiler, after capable of effectively avoiding two denitration devices of setting,
Wherein one is chronically at idle state, while combined denitration system can reduce investment, saves space occupied, operation operation is more
Add conveniently.
In this regard, the technical solution of the use of the new type are as follows:
A kind of combined denitration system of gas fired-boiler and biogas internal combustion engine comprising SCR reactor, flue gas monitoring module,
Control module, reducing agent supplying module, compressed air auxiliary supplying module and smoke-intake pipe road, the smoke exhaust pipe of the gas fired-boiler
Road, biogas internal combustion engine smoke discharging pipe connect with smoke-intake pipe road；The compressed air auxiliary supplying module and reducing agent supply mould
Block connection, provides compressed air；The reducing agent supplying module is exported equipped with reducing agent, and the reducing agent outlet is reacted with SCR
The entrance of device, the connection of smoke-intake pipe road；The probe of the flue gas monitoring module is located at the outlet of SCR reactor, smoke-intake pipe road enters
Mouthful；The reducing agent supplying module, flue gas monitoring module are connect with control module respectively.It adopts this technical solution, for combustion gas
Boiler is combined with biogas internal combustion engine using a set of denitrating system, has been saved resource, has been improved the utilization rate of denitrating system.
The reducing agent supplying module includes urea pump, urea tank and urea as a further improvement of the utility model,
Urea in urea tank is sprayed onto smoke-intake pipe road by injection pipe, the urea pump by urea injection pipe；The urea pump with
Control module connection.
The compressed air auxiliary supplying module includes air compressor machine and air as a further improvement of the utility model,
Tank, the air compressor machine provide the air delivery in air tank to compressed air into urea pump.
It includes branch pipe tee connection as a further improvement of the utility model, three ends of the branch pipe tee connection respectively with combustion
The smoke discharging pipe of gas boiler, the smoke discharging pipe of biogas internal combustion engine, the connection of smoke-intake pipe road.
It includes temperature sensor as a further improvement of the utility model, and the probe of the temperature sensor is located at
The entrance and exit of SCR reactor, the temperature sensor are connect with control module respectively.
The smoke discharging pipe of the gas fired-boiler is equipped with flue gas check-valves as a further improvement of the utility model,；Institute
The smoke discharging pipe for stating biogas internal combustion engine is equipped with flue gas check-valves.
The outlet of the SCR reactor is equipped with muffler as a further improvement of the utility model,.
The combined denitration system of the gas fired-boiler and biogas internal combustion engine includes as a further improvement of the utility model,
The outlet of chimney, the SCR reactor is connect with chimney, and height of the outlet of the chimney apart from ground is not less than 15m.
Compared with prior art, the utility model has the following beneficial effects:
Using the technical solution of the utility model, the smoke discharging pipe of gas fired-boiler smoke evacuation and biogas internal combustion engine is merged laggard
Enter SCR denitration equipment, form combined denitration system, the formula investing relative to one-to-one arrangement denitration device is small, it is only necessary to one
Denitration device, including air compressor machine, urea tube, reactor and control system etc. are covered, saves space occupied, equipment operation operation is more
It is convenient.Meanwhile the smoke evacuation of Biogas Generator Set, at 450 DEG C or so, at 150 DEG C or so, two-way smoke evacuation is passed through for the smoke evacuation of gas fired-boiler
After the mixing of this system, middle-temperature section (300 ~ 350 DEG C) flue gas for being conducive to denitration reaction is formed, denitration efficiency is high.
Detailed description of the invention
Fig. 1 is a kind of oil burning boiler of the utility model and the combined denitration system flow chart of biogas internal combustion engine.
Fig. 2 is a kind of smoke discharging pipe arrangement schematic diagram of embodiment of the utility model.
Specific embodiment
With reference to the accompanying drawing, the preferably embodiment of the utility model is described in further detail.
As shown in Fig. 1 ~ Fig. 2, a kind of combined denitration system of gas fired-boiler and biogas internal combustion engine comprising SCR reactor
1, flue gas monitoring module, control module, reducing agent supplying module, compressed air auxiliary supplying module, temperature sensor and into cigarette
Pipeline 4, the smoke discharging pipe 2 of the gas fired-boiler, the smoke discharging pipe 3 of biogas internal combustion engine are connect with smoke-intake pipe road 4；The compression is empty
Gas auxiliary supplying module is connect with reducing agent supplying module, provides compressed air；The reducing agent supplying module is equipped with reducing agent
Outlet, the reducing agent outlet are connect with the entrance of SCR reactor 1, smoke-intake pipe road 4；The probe of the flue gas monitoring module is set
In the outlet of SCR reactor 1, the entrance in smoke-intake pipe road 4；The reducing agent supplying module, flue gas monitoring module, temperature sensor
It is connect respectively with control module.The probe of the temperature sensor is located at the entrance and exit of SCR reactor 1.The flue gas prison
Survey module is NOx concentration sensor.
As shown in Figure 1, the reducing agent supplying module includes urea pump 5, urea tank 6 and urea injection pipe 7, the urea
Urea in urea tank 6 is sprayed onto smoke-intake pipe road 4 by pump 5 by urea injection pipe 7；The urea pump 5 connects with control module
It connects.Compressed air auxiliary supplying module includes air compressor machine 8 and air tank 9, and the air compressor machine 8 is by the air in air tank 9
It is transported in urea pump 5 and compressed air is provided.The smoke discharging pipe 2 of the gas fired-boiler, biogas internal combustion engine smoke discharging pipe 3, into
Smoke pipeline 4 is connected by branch pipe tee connection 10.
As shown in Fig. 2, the smoke discharging pipe 2 of the gas fired-boiler is equipped with flue gas check-valves 11；The biogas internal combustion engine
Smoke discharging pipe 3 is equipped with flue gas check-valves 11.The outlet of the SCR reactor 1 is equipped with muffler 12.The gas fired-boiler and natural pond
The combined denitration system of gas internal combustion engine includes chimney 13, and the outlet of the SCR reactor 1 is connect with chimney 13, the chimney 13
Height of the outlet apart from ground be not less than 15m.
As shown in Figure 1, the working principle of the combined denitration system are as follows: control module makes urea pump according to NOx emission parameter
5 extract urea liquid out according to signal from urea tank 6, measure, pressurize after send the spray gun to pipeline, by drawing for compressed air
It is sprayed under the effect of penetrating from urea injection pipe 7.Urea liquid meet smoke-intake pipe road 4 in high-temperature flue gas pyrolysis at after ammonia by SCR
Reactor 1 carries out denitration reaction.It is molten that control module according to exhaust gas flow, temperature and NOx concentration accurately calculates required urea
Liquid the amount of injection, urea pump 5 are adjusted urea liquid according to signal, to guarantee that moment accurate urea liquid is ejected into
Exhaust pipe.So that the purification efficiency of biogas motor group equipment for denitrifying flue gas is reached highest, meets stringent discharge index.
In Fig. 2, the smoke discharging pipe 2 of gas fired-boiler is the stainless steel pipes of DN200mm, and 2t gas fired-boiler exhaust smoke level is about
2200m3/ h, exhaust gas temperature are about 150 DEG C；The smoke discharging pipe 3 of 1.2WM biogas internal combustion engine is the stainless steel pipes of DN200mm, hair
Motor group exhaust smoke level is about 4500m3/ h, exhaust gas temperature are about 450 DEG C.Exhaust gas volumn is 6700m after mixing3/ h, exhaust gas temperature are about
350℃.Two-way smoke pipe accesses smoke-intake pipe road 4 by threeway, and smoke-intake pipe road 4 uses DN200mm stainless steel main pipeline.Reserved 2m is straight
Urea liquid of the pipeline section for injection is sufficiently mixed by high-temperature flue gas, is decomposed.The subsequent SCR reactor 1 that enters carries out denitration reaction.
Expansion joint is set at each pipeline section, equipment interface.Flue gas after denitration process is discharged, chimney breast after muffler from chimney
It is not less than 15m apart from altitude.
Preferably, the flue gas lateral flow in SCR reactor sets guiding device, Benitration reactor in entrance and outlet section
It is designed as Multi-layer design, the later period is facilitated to upgrade, meets more stringent emission requirements.In each Reactor inlet, outlet setting NOx
Concentration and temperature sensor, to detect catalyst condition and denitration efficiency.
The specific embodiment of the above is the better embodiment of the utility model, and it is practical new not to limit this with this
The specific implementation range of type, the scope of the utility model includes being not limited to present embodiment, all according to the utility model
Shape, structure made by equivalence changes it is within the protection scope of the present utility model.
Claims (8)
1. the combined denitration system of a kind of gas fired-boiler and biogas internal combustion engine, it is characterised in that: it includes SCR reactor, flue gas
Monitoring modular, control module, reducing agent supplying module, compressed air auxiliary supplying module and smoke-intake pipe road, the gas fired-boiler
Smoke discharging pipe, biogas internal combustion engine smoke discharging pipe connect with smoke-intake pipe road；The compressed air auxiliary supplying module and reduction
The connection of agent supplying module, provides compressed air；The reducing agent supplying module is exported equipped with reducing agent, reducing agent outlet with
The entrance of SCR reactor, the connection of smoke-intake pipe road；The probe of the flue gas monitoring module is located at outlet, the smoke-intake pipe of SCR reactor
The entrance in road；The reducing agent supplying module, flue gas monitoring module are connect with control module respectively.
2. the combined denitration system of gas fired-boiler according to claim 1 and biogas internal combustion engine, it is characterised in that: described to go back
Former agent supplying module includes urea pump, urea tank and urea injection pipe, and the urea in urea tank is passed through urea by the urea pump
Injection pipe is sprayed onto smoke-intake pipe road；The urea pump is connect with control module.
3. the combined denitration system of gas fired-boiler according to claim 2 and biogas internal combustion engine, it is characterised in that: the pressure
It includes air compressor machine and air tank that contracting air, which assists supplying module, and the air compressor machine is by the air delivery in air tank into urea pump
Compressed air is provided.
4. the combined denitration system of gas fired-boiler according to claim 2 and biogas internal combustion engine, it is characterised in that: it includes
Branch pipe tee connection, three ends of the branch pipe tee connection are respectively with the smoke discharging pipe of gas fired-boiler, the smoke discharging pipe of biogas internal combustion engine, into cigarette
Pipeline connection.
5. the combined denitration system of gas fired-boiler described in any one and biogas internal combustion engine according to claim 1 ~ 4, feature
Be: it includes temperature sensor, and the probe of the temperature sensor is located at the entrance and exit of SCR reactor, the temperature
Sensor is connect with control module respectively.
6. the combined denitration system of gas fired-boiler according to claim 5 and biogas internal combustion engine, it is characterised in that: the combustion
The smoke discharging pipe of gas boiler is equipped with flue gas check-valves；The smoke discharging pipe of the biogas internal combustion engine is equipped with flue gas check-valves.
7. the combined denitration system of gas fired-boiler according to claim 6 and biogas internal combustion engine, it is characterised in that: described
The outlet of SCR reactor is equipped with muffler.
8. the combined denitration system of gas fired-boiler according to claim 7 and biogas internal combustion engine, it is characterised in that: it includes
The outlet of chimney, the SCR reactor is connect with chimney, and height of the outlet of the chimney apart from ground is not less than 15m.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720901109 | 2017-07-24 | ||
| CN2017209011091 | 2017-07-24 |
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| CN208975538U true CN208975538U (en) | 2019-06-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Address after: 518000, The Union Buildings, No. 1069, Nanhai Road, Shekou, Guangdong, Shenzhen, Nanshan District, three Patentee after: GAD ENVIRONMENTAL TECHNOLOGY Co.,Ltd. Address before: 518000, The Union Buildings, No. 1069, Nanhai Road, Shekou, Guangdong, Shenzhen, Nanshan District, three Patentee before: SHENZHEN GAD ENVIRONMENTAL TECHNOLOGY Co.,Ltd. |