CN208340497U - A kind of efficient control device of gas fired-boiler nitrogen oxides - Google Patents
A kind of efficient control device of gas fired-boiler nitrogen oxides Download PDFInfo
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- CN208340497U CN208340497U CN201820517185.7U CN201820517185U CN208340497U CN 208340497 U CN208340497 U CN 208340497U CN 201820517185 U CN201820517185 U CN 201820517185U CN 208340497 U CN208340497 U CN 208340497U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model discloses a kind of efficient control devices of gas fired-boiler nitrogen oxides, including burner, drying system and flue gas on-line detecting system；Burner is connected to boiler body, it is connected to after the baffle door that the exhanst gas outlet pipeline of boiler body is arranged by drying system with drying system, drying system is connected to after passing through the baffle door and flue being arranged thereon with catalyst reaction device, the exhanst gas outlet pipeline of catalyst reaction device is connect by air-introduced machine with residual heat using device, residual heat using device outlet connects external smoke discharging pipe, residual heat using device is separately connected water treatment system and water replanishing device, boiler body is also connected with water replanishing device, flue gas on-line detecting system is also connected on flue between drying system and exhanst gas outlet.The device is not necessarily to additional reducing agent, easy to operate, while preventing catalyst water intoxication, improves using effect, extends catalyst service life, and system recycles the waste heat generated during flue gas emission with condensed water.
Description
Technical field
The utility model belongs to environmental protection technology smoke, and in particular to a kind of gas fired-boiler nitrogen oxides is high
Imitate control device.
Background technique
Nitrogen oxides is predominantly in the form of NO and NO2, its natural environment and human body can be generated different degrees of
Harm, may participate in form photochemical fog, cause generate acid rain, acid mist, aggravate greenhouse effects, destroy ozone layer, directly or
Ground connection generates toxic action to human body and other biological.Natural gas is a kind of energy of relative clean, and burning generates main
Pollutant is nitrogen oxides, but with increasingly stringent, the cigarette of Some gases boiler for the air pollution emission standard promulgated in succession
Gas discharge is not inconsistent standardization, and it is extremely urgent that nitrogen work drops in gas fired-boiler flue gas.
Application No. is 201620131576.6 Chinese utility model patents, disclose a kind of combustion gas of combination SCR reaction
Denitration in Boiler handles catalysis system, needs additional reducing agent urea, urea liquid is added in denitrating system and prepares spraying system, but
Denitrating catalyst is easy to happen water intoxication, reduces using effect, and system complex, lacks safety；Application No. is
201420469202.6 Chinese utility model patent, disclose a kind of low nitrogen burning and selective non-catalytic reduction denitration set
It is standby, including low NO, multiple spray guns, reducing agent distributor, atomizing air distributor, spray gun cooling air distributor, pressure
Contracting air-source and reducer feeding device carry out denitration using low nitrogen burning denitration technology and SNCR technology, but system and device is multiple
Miscellaneous, energy saving is poor, needs to improve.For gas fired-boiler, complicated, investment operating cost height is transformed in traditional denitrification apparatus, it is difficult to
It promotes.
Utility model content
In order to solve the above-mentioned technical problem the utility model, provides a kind of gas fired-boiler nitrogen oxides and efficiently controls dress
It sets, is not necessarily to additional reducing agent, it is easy to operate, while preventing catalyst water intoxication, using effect is improved, extends catalyst and uses the longevity
Life, and system recycles the preheating generated during flue gas emission with condensed water.
The utility model is to be achieved through the following technical solutions:
A kind of efficient control device of gas fired-boiler nitrogen oxides, including boiler body, burner, drying system, catalysis are instead
Answer device, residual heat using device, water treatment system, water replanishing device and flue gas on-line detecting system；The burner and boiler
Ontology is connected to, and is connected to after the baffle door that the exhanst gas outlet pipeline of boiler body is arranged by drying system with drying system, dry
System is connected to after passing through the baffle door and flue being arranged thereon with catalyst reaction device, the smoke outlet tube of catalyst reaction device
Road is connect by air-introduced machine with residual heat using device, and residual heat using device outlet connects external smoke discharging pipe, residual heat using device
It is separately connected water treatment system and water replanishing device, boiler body is also connected with water replanishing device, between drying system and exhanst gas outlet
Flue on be also connected with flue gas on-line detecting system.
The drying unit dried to its desiccant, drying dress are provided with by baffle door below the drying system
It sets the other side and heat exchanger is connected by the baffle door and flue being arranged on drying system, heat exchanger is separately connected water treatment system
And water replanishing device.
Between the drying system and catalyst reaction device, between catalyst reaction device and air-introduced machine, UTILIZATION OF VESIDUAL HEAT IN dress
It sets and is provided with sampled point between exhanst gas outlet, multiple sampled points pass through switch valve and are connected to flue gas on-line detecting system
In control system.
The burner is low NO, and residual heat using device is connected by condensed water outlet pipe and water treatment system
It connects.
Porous water-absorbing material built in the drying system.
The porous water-absorbing material is heat-resisting porous dry agent, the flue gas gone out for dry pot fire grate.
The catalyst reaction device is built-in with board-like, corrugated or cellular catalyst module, and there is load in module contains
There is the catalyst of noble metal active ingredient, for being catalyzed the redox reaction of nitrogen oxides in effluent and carbon monoxide.
The catalyst containing noble metal active ingredient is Pda-Rhb/(CoOx)c(MnOx)d, wherein 0 < a≤0.2,0
<b≤0.2,0 < c≤0.8,0 < d≤0.7；Wherein, the reaction temperature window of this catalyst is 50-350 DEG C.
The residual heat using device be heat exchanger, energy-saving appliance or economizer, can also be with other residual heat using device shapes
Formula exists, and the circulation in heat exchanger is connect with water replanishing device, and a small amount of condensed water that heat exchanger generates passes through condensate pipe
Into water treatment system.
The water treatment system is also connected with water replanishing device, water treatment system include medicine storing pot, medicine adding controller and
Water tank, a small amount of condensed water that a large amount of condensed waters and residual heat using device for collecting and handling heat exchanger generation generate, and
The water supply being newly added, treated, and water enters water replanishing device.
Compared with prior art, the utility model has technical effect beneficial below:
The efficient control device of gas fired-boiler nitrogen oxides provided by the utility model is asked for existing gas fired-boiler drop nitrogen
Topic, the utility model is not necessarily to additional reducing agent, easy to operate, while preventing catalyst water intoxication, improves using effect, and extension is urged
Agent service life, and system recycles the preheating generated during flue gas emission with condensed water, overall ring
Border benefit and remarkable in economical benefits.
(1) novel to use low nitrogen compared with conventional gas boiler low-NO_x combustion technology and tail portion SCR and SNCR denitration technology
Combustion technology and catalysis drop nitrogen technology, do not need additional reducing agent and flue gas outer circulation pipeline, that is, can reach current discharge mark
Standard, the low nitrogen transformation of boiler is convenient, easy to operate, highly-safe.
(2) the utility model dries boiler export flue gas, reduces catalyst water intoxication degree, improves catalysis
Effect extends catalyst service life；Desiccant may be reused, and reduce cost.
(3) heat that system generates fume afterheat and desiccant drying carries out reuse, reduces energy waste.
Detailed description of the invention
Fig. 1 is the efficient controling device structure diagram of gas fired-boiler nitrogen oxides provided by the utility model.
In figure: 1 is boiler body, and 2 be burner, and 3 be drying system, and 4 be catalyst reaction device, and 5 be air-introduced machine, and 6 are
Residual heat using device, 7 be drying unit, and 8 be baffle door, and 9 be heat exchanger, and 10 be flue gas on-line detecting system, and 11 be switch valve,
12 be sampled point, and 13 be water treatment system, and 14 be water replanishing device, and 15 be condensed water outlet pipe.
Specific embodiment
The utility model is described in further detail below with reference to specific embodiment, described is to the utility model
Explanation rather than limit.
Referring to Fig. 1, a kind of efficient control device of gas fired-boiler nitrogen oxides, including boiler body 1, burner 2, dry system
System 3, catalyst reaction device 4, residual heat using device 6, water treatment system 13, water replanishing device 14 and flue gas on-line detecting system 10；
The burner 2 is connected to boiler body 1, the baffle door that the exhanst gas outlet pipeline of boiler body 1 is arranged by drying system
It being connected to afterwards with drying system 3, drying system 3 is connected to after passing through the baffle door and flue being arranged thereon with catalyst reaction device 4,
The exhanst gas outlet pipeline of catalyst reaction device 4 is connect by air-introduced machine 5 with residual heat using device 6, and the outlet of residual heat using device 6 connects
Connect external smoke discharging pipe, residual heat using device 6 is separately connected water treatment system 13 and water replanishing device 14, boiler body 1 also with benefit
Water installations 14 are connected, and flue gas on-line detecting system 10 is also connected on the flue between drying system 3 and exhanst gas outlet.
The drying unit 7 dried to its desiccant is provided with by baffle door below the drying system 3, is dried
7 other side of device passes through the baffle door being arranged on drying system and flue connects heat exchanger 9, and heat exchanger 9 is separately connected at water
Reason system 13 and water replanishing device 14.Boiler shutdown state, drying system and boiler body and catalysis are in when drying unit works
The baffle door of reaction unit connection is in close state, and other two baffle door is in the open state.
Between the drying system 3 and catalyst reaction device 4, between catalyst reaction device 4 and air-introduced machine 5, waste heat benefit
With sampled point 12 is provided between device 6 and exhanst gas outlet, multiple sampled points 12 are connected to flue gas by switch valve 11 and exist
In the control system of line detection system 10.
The residual heat using device 6 is connect by condensed water outlet pipe 15 with water treatment system 13.
The burner 2 is low NO, porous water-absorbing material built in drying system.
The porous water-absorbing material is heat-resisting porous dry agent, the flue gas gone out for dry pot fire grate.
The catalyst reaction device is built-in with board-like, corrugated or cellular catalyst module, and there is load in module contains
There is the catalyst of noble metal active ingredient, for being catalyzed the redox reaction of nitrogen oxides in effluent and carbon monoxide；Reaction
Formula are as follows: NO+CO → N2+CO2。
The catalyst containing noble metal active ingredient is Pda-Rhb/(CoOx)c(MnOx)d, wherein 0 < a≤0.2,0
<b≤0.2,0 < c≤0.8,0 < d≤0.7；Wherein, the reaction temperature window of this catalyst is 50-350 DEG C.
The residual heat using device be heat exchanger, energy-saving appliance or economizer, can also be with other residual heat using device shapes
Formula exists, and the circulation in heat exchanger is connect with water replanishing device, and a small amount of condensed water that heat exchanger generates passes through condensate pipe
Into water treatment system.
The water treatment system is also connected with water replanishing device, water treatment system include medicine storing pot, medicine adding controller and
Water tank, a small amount of condensed water that a large amount of condensed waters and residual heat using device for collecting and handling heat exchanger generation generate, and
The water supply being newly added, treated, and water enters water replanishing device.
Specifically, drying system is connect with catalyst reaction device by flue, between be equipped with baffle door.
Preferably, the burner is that low NO is fired for the ignition burning device of gas fired-boiler by low nitrogen
Burning technology reduces the yield of nitrogen oxides on source, and original discharge concentration can be controlled in 80mg/Nm3Below.The combustion
The display of burner and control system can both merge with boiler control system or independently of boiler control system.
The drying system, built-in porous water-absorbing material can be but are not limited only to heat-resisting porous dry agent, for doing
The flue gas of dry boiler discharge, and moisture is precipitated at a higher temperature.
The catalyst reaction device, catalyst reaction device are built-in with board-like, corrugated or cellular catalyst module, mould
Load has the catalyst containing noble metal isoreactivity ingredient on block, for being catalyzed the oxidation of nitrogen oxides in effluent and carbon monoxide
Reduction reaction.Reaction equation are as follows: NO+CO → N2+CO2。
The catalyst containing noble metal isoreactivity ingredient is Pda-Rhb/(CoOx)c(MnOx)d, wherein 0 < a≤
0.2,0 <b≤0.2,0 < c≤0.8,0 < d≤0.7.The reaction temperature window of this catalyst is 50-350 DEG C.By to burned
Journey is optimized and revised, and 80% or more denitration efficiency can be achieved in the Gas Parameters such as control CO production quantity, catalysis reaction.
The residual heat using device can by but be not limited only to exist in the form of heat exchanger, following in residual heat using device
Ring water system is connect with boiler replenishing water device, and for exchanging heat with boiler smoke, the moisture of heating boiler supplement is recycled
Fume afterheat；After a small amount of condensed water that device generates enters water treatment system by condensate pipe, into water replanishing device.
Further, the utility model further includes drying unit, and boiler shutdown state is in when drying unit works, dry
The baffle door that system is connect with boiler body and catalyst reaction device is in close state.Drying unit side and drying system phase
Even, the other side is connect by flue with heat exchanger, the utilization and condensation for air waste heat after drying desiccant and drying.Heat exchange
The recirculated water of device comes from boiler replenishing water device, and a large amount of condensed water that heat exchanger generates enters benefit after entering water treatment system processing
Water installations.The control system of the drying unit can both merge with boiler control system or independently of boiler implosion system
System.
The flue gas on-line detecting system, detection catalyst reaction device flue before and after and system exhanst gas outlet at
Divide concentration, each constituent concentration of detection smoke outlet flue gas, and the performance for judging catalyst is applied not only to, as catalysis
Foundation whether agent is replaced.The display of the flue gas on-line detecting system and control system can both be closed with boiler control system
And it can also be independently of boiler control system.
The water treatment system includes medicine storing pot, medicine adding controller and water tank (not shown here), for collecting simultaneously
Handle heat exchanger generate a large amount of condensed waters and flue gas residual heat using device generate a small amount of condensed water, and be newly added to
Water, treated, and water enters water replanishing device.
The water replanishing device is received for providing the recirculated water of flue gas waste heat utilization device and drying unit heat exchanger
Water treatment system treated water and supplement boiler institute's water shortage point.
Gas fired-boiler generate flue gas in major pollutants be nitrogen oxides, the utility model using low-NO_x combustion technology with
Catalysis drop nitrogen technology, does not need additional reducing agent and flue gas outer circulation pipeline, that is, can reach current discharge standard, operation letter
It is single, it is highly-safe.Meanwhile the utility model dries boiler export flue gas, reduces catalyst water intoxication degree, mentions
High catalytic effect extends catalyst service life；Desiccant may be reused, and reduce cost.System is to fume afterheat and does
The heat that drying prescription drying generates carries out reuse, reduces energy waste, total environment benefit and remarkable in economical benefits.
The efficient control device of gas fired-boiler nitrogen oxides provided by the utility model is asked for existing gas fired-boiler drop nitrogen
Topic, the utility model is not necessarily to additional reducing agent, easy to operate, while preventing catalyst water intoxication, improves using effect, and extension is urged
Agent service life, and system recycles the preheating generated during flue gas emission with condensed water, overall ring
Border benefit and remarkable in economical benefits.
(1) novel to use low nitrogen compared with conventional gas boiler low-NO_x combustion technology and tail portion SCR and SNCR denitration technology
Combustion technology and catalysis drop nitrogen technology, do not need additional reducing agent and flue gas outer circulation pipeline, that is, can reach current discharge mark
Standard, the low nitrogen transformation of boiler is convenient, easy to operate, highly-safe.
(2) the utility model dries boiler export flue gas, reduces catalyst water intoxication degree, improves catalysis
Effect extends catalyst service life；Desiccant may be reused, and reduce cost.
(3) heat that system generates fume afterheat and desiccant drying carries out reuse, reduces energy waste.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (10)
1. a kind of efficient control device of gas fired-boiler nitrogen oxides, which is characterized in that including boiler body (1), burner (2),
Drying system (3), catalyst reaction device (4), residual heat using device (6), water treatment system (13), water replanishing device (14) and flue gas
On-line detecting system (10)；The burner (2) is connected to boiler body (1), and the exhanst gas outlet pipeline of boiler body (1) is logical
Be connected to after crossing the baffle door of drying system setting with drying system (3), drying system (3) by the baffle door that is arranged thereon and
It is connected to after flue with catalyst reaction device (4), the exhanst gas outlet pipeline of catalyst reaction device (4) passes through air-introduced machine (5) and waste heat
It is connected using device (6), residual heat using device (6) outlet connects external smoke discharging pipe, and residual heat using device (6) is separately connected water
Processing system (13) and water replanishing device (14), boiler body (1) are also connected with water replanishing device (14), drying system (3) and flue gas
Flue gas on-line detecting system (10) are also connected on flue between outlet.
2. the efficient control device of gas fired-boiler nitrogen oxides according to claim 1, which is characterized in that the dry system
The drying unit (7) dried to its desiccant is provided with by baffle door below system (3), drying unit (7) other side is logical
It crosses the baffle door being arranged on drying system and flue connection heat exchanger (9), heat exchanger (9) is separately connected water treatment system (13)
With water replanishing device (14).
3. the efficient control device of gas fired-boiler nitrogen oxides according to claim 1, which is characterized in that the dry system
Unite between (3) and catalyst reaction device (4), between catalyst reaction device (4) and air-introduced machine (5), residual heat using device (6) and cigarette
Gas is provided with sampled point (12) between outlet, and multiple sampled points (12) are connected to flue gas on-line checking by switch valve (11)
In the control system of system (10).
4. the efficient control device of gas fired-boiler nitrogen oxides according to claim 1, which is characterized in that the burner
It (2) is low NO, residual heat using device (6) is connect by condensed water outlet pipe (15) with water treatment system (13).
5. the efficient control device of gas fired-boiler nitrogen oxides according to claim 1, which is characterized in that the dry system
Porous water-absorbing material built in uniting.
6. the efficient control device of gas fired-boiler nitrogen oxides according to claim 5, which is characterized in that the porous suction
Water material is heat-resisting porous dry agent, the flue gas gone out for dry pot fire grate.
7. the efficient control device of gas fired-boiler nitrogen oxides according to claim 1, which is characterized in that the catalysis is anti-
Device is answered to be built-in with board-like, corrugated or cellular catalyst module, load has urging containing noble metal active ingredient in module
Agent, for being catalyzed the redox reaction of nitrogen oxides in effluent and carbon monoxide.
8. the efficient control device of gas fired-boiler nitrogen oxides according to claim 7, which is characterized in that described containing is expensive
The catalyst of metal active ingredient is Pda-Rhb/(CoOx)c(MnOx)d, wherein 0 < a≤0.2,0 <b≤0.2,0 < c≤0.8,0 < d
≤0.7；Wherein, the reaction temperature window of this catalyst is 50-350 DEG C.
9. the efficient control device of gas fired-boiler nitrogen oxides according to claim 1, which is characterized in that the waste heat benefit
It is heat exchanger, energy-saving appliance or economizer with device, the circulation in heat exchanger is connect with water replanishing device, what heat exchanger generated
A small amount of condensed water enters water treatment system by condensate pipe.
10. the efficient control device of gas fired-boiler nitrogen oxides according to claim 1, which is characterized in that at the water
Reason system is also connected with water replanishing device, and water treatment system includes medicine storing pot, medicine adding controller and water tank, for collecting and handling
A small amount of condensed water that a large amount of condensed waters and residual heat using device that heat exchanger generates generate, and the water supply being newly added, after processing
Water enter water replanishing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820517185.7U CN208340497U (en) | 2018-04-12 | 2018-04-12 | A kind of efficient control device of gas fired-boiler nitrogen oxides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201820517185.7U CN208340497U (en) | 2018-04-12 | 2018-04-12 | A kind of efficient control device of gas fired-boiler nitrogen oxides |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108452674A (en) * | 2018-04-12 | 2018-08-28 | 陕西大秦环保设备有限公司 | A kind of efficient control device and method of gas fired-boiler nitrogen oxides |
| CN110180387A (en) * | 2019-07-02 | 2019-08-30 | 苏州仕净环保科技股份有限公司 | A kind of efficient process system polluting gas source |
-
2018
- 2018-04-12 CN CN201820517185.7U patent/CN208340497U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108452674A (en) * | 2018-04-12 | 2018-08-28 | 陕西大秦环保设备有限公司 | A kind of efficient control device and method of gas fired-boiler nitrogen oxides |
| CN110180387A (en) * | 2019-07-02 | 2019-08-30 | 苏州仕净环保科技股份有限公司 | A kind of efficient process system polluting gas source |
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