CN206625897U - Utilize the gas distributed energy system that urea is reducing agent denitration - Google Patents
Utilize the gas distributed energy system that urea is reducing agent denitration Download PDFInfo
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- CN206625897U CN206625897U CN201720311733.6U CN201720311733U CN206625897U CN 206625897 U CN206625897 U CN 206625897U CN 201720311733 U CN201720311733 U CN 201720311733U CN 206625897 U CN206625897 U CN 206625897U
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Abstract
It is particularly a kind of using the gas distributed energy system that urea is reducing agent denitration the utility model discloses a kind of gas distributed energy system, belong to combustion gas distributed energy energy supply technical field.The system is made up of gas turbine engine systems, denitrating system and waste heat cold and heat supply electricity generation system, and gas turbine engine systems are located at the top of the system, and denitrating system, waste heat cold and heat supply electricity generation system are sequentially placed into after gas turbine engine systems.Bucket elevator, dissolving tank, delivery pump, urea solution tank, conveying EGR, flow valve, metered dispensing unit, pyrolysis chamber and SCR reactors, metered dispensing unit, the pyrolysis chamber that denitrating system includes being sequentially connected with connect with gas turbine engine systems.The utility model couples gas turbine engine systems, denitrating system and waste heat cold and heat supply electricity generation system, carries out denitration process to exiting flue gas, reduces the discharge of nitrogen oxides；It can also be that user provides electricity, heat and cold simultaneously, improve comprehensive utilization rate of energy source.
Description
Technical field
It the utility model is related to a kind of gas distributed energy system, particularly a kind of using urea is reducing agent denitration
Gas distributed energy system, belong to combustion gas distributed energy energy supply technical field.
Background technology
With China's expanding economy, the spies such as the centralized coal-burning power plant's comprehensive utilization ratio of tradition is low, environmental-protecting performance is poor
Point gradually exposure, generating efficiency is high, the preferable distributed energy industry of environmental-protecting performance is greatly developed.Combustion gas distributed energy
System is greatly developed due to the features such as its integrated heat efficiency is high, flue gas cleans, energy supply side local use.Combustion gas is distributed
Energy fuel is natural gas, and natural gas can produce a variety of nitrogen oxides in the burning of combustion engine.Using the distribution of gas turbine
Energy resource system does not have denitrification apparatus, and general use improves combustion technology to reach certain effect for removing denitrification, but de-
Except rate is usually no more than 60%, combustion turbine exhaustion amount of nitrogen oxides is in 50mg/m3Left and right, denitration efficiency is than relatively low, nitrogen oxygen
Compound does not reach emission request, and environmental-protecting performance is poor.
Utility model content
The purpose of this utility model is, there is provided a kind of to utilize the combustion gas distributed energy system that urea is reducing agent denitration
System.The utility model couples gas turbine engine systems, denitrating system and waste heat cold and heat supply electricity generation system equipment moduleization, to being
Exiting flue gas of uniting carries out denitration process, further reduces the discharge of nitrogen oxides in gas distributed energy system unit, ensures
Unit discharges flue gas meet the requirement of environmental protection；Meanwhile different UTILIZATION OF VESIDUAL HEAT INs is carried out to the flue gas of different temperatures, realize the ladder of energy
Level utilizes, and provides electricity, heat and cold simultaneously for user, improves comprehensive utilization rate of energy source.
In order to solve the above technical problems, the utility model adopts the following technical scheme that：
It is a kind of using urea for reducing agent denitration gas distributed energy system by gas turbine engine systems, denitrating system and
Waste heat cold and heat supply electricity generation system forms, and the gas turbine engine systems are located at the top of the system, and the denitrating system, waste heat supply
Cold heat supply electricity generation system is sequentially placed into after the gas turbine engine systems.The denitrating system include be sequentially connected with bucket elevator,
Dissolving tank, delivery pump, urea solution tank, conveying EGR, flow valve, metered dispensing unit, pyrolysis chamber and SCR reactors,
The flow valve is also connected with urea solution tank, and the metered dispensing unit, pyrolysis chamber connect with gas turbine engine systems.Denitration
The reducing agent that system mainly selects has pure ammonia, ammoniacal liquor and urea, compared to pure ammonia and ammoniacal liquor, urea have it is nontoxic, harmless, without quick-fried
The features such as fried.Meanwhile urea is considered in transport, storage without safety and danger, safety coefficient is high.By urea liquid spirt
Realize that redox reaction can also avoid ammonia from causing personnel to hinder during power plant's storage and pipeline, valve leaks in pyrolysis chamber
Evil, there is preferable security context for the denitrating system of reducing agent using urea.Nitrogen oxides is mainly by gas turbine engine systems
Burning generation, and the amount of nitrogen oxides changes with gas turbine engine systems operating condition difference.Denitration using urea as reducing agent
System is located at after gas turbine engine systems, main to use urea pyrolysis technique, after the directly quick heating atomization of urea pyrolysis technique
Urea liquid, there is tracking unit load variations speed, the advantages that response time is short.
Foregoing gas turbine engine systems include air compressor, air preheater, combustion chamber, gas turbine and flue gas shunting
Device, the air compressor, air preheater, combustion chamber and gas turbine are sequentially connected with, the gas turbine, flue gas shunting device
It is connected with air preheater, the flue gas shunting device is also attached to metered dispensing unit and pyrolysis chamber.Changed in air preheater
Gas turbine exiting flue gas after heat flows through flue gas shunting device, the metered dispensing unit that part of smoke is imported in denitrating system,
Atomization urea is formed in metered dispensing unit with urea liquid；The pyrolysis chamber that remaining flue gas enters in denitrating system, for atomization
The pyrolysis of urea provides thermal source.This kind of mode reduces air blower and pyrolysis chamber's external heat source compared with traditional deamination apparatus
Configuration, saved system cost and energy, improved system whole utilization efficiency.
Foregoing waste heat cold and heat supply electricity generation system includes feed pump, waste heat boiler, steam turbine, heating equipment, absorption
Formula refrigeration plant and cooling equipment, the feed pump, waste heat boiler, steam turbine, absorption refrigerating equipment and cooling equipment are suitable
Secondary connection, the waste heat boiler are also respectively connected with SCR reactors and heating equipment.In waste heat cold and heat supply electricity generation system,
Boiler feedwater is pumped into waste heat boiler by feed pump and exchanged heat with denitrating system exiting flue gas, and the boiler feedwater after heat exchange is divided into two
Stock logistics：Middle warm water and high-temperature vapor.Middle warm water is heat user heat supply by heating equipment；High-temperature vapor enters vapor wheel
Machine generates electricity acting, and steam turbine exhaust into absorption refrigerating equipment produces cold as high temperature heat source, from cooling equipment to colod-application
Family cooling.
Compared with prior art, it is of the present utility model to be beneficial in that：
1st, by gas turbine engine systems, denitrating system and afterheat utilizing system effective integration, system is gone out using SCR denitration method
Mouth flue gas carries out denitration process, further reduces the discharge capacity of nitrogen oxides in unit so that nitrogen oxides is less than 30mg/m3's
75 DEG C or so of low-temperature flue gas is discharged into air, meets the requirement that nitrogen oxides rationally discharges, improves distributed energy resource system
Environmental-protecting performance；
2nd, combustion turbine exhaustion is divided into two parts, is partly into metered dispensing unit and is mixed to form mist with urea liquid
Change urea, convenient spray into pyrolysis chamber is pyrolyzed, and remaining flue gas enters the thermal source as atomization urea pyrolysis in pyrolysis chamber, this
On the one hand kind configuration reduces the setting of air blower in metering distribution system, on the other hand utilize the gas turbine of high-temperature cleaning
It is vented and provides thermal source for urea pyrolysis, reduces the configuration of pyrolysis chamber's external heat source, save equipment investment, reduce cost；
3rd, the different principle of nitrogen oxides is produced according to gas turbine engine systems operating load is different, added after urea solution tank
Dress conveying EGR and flow valve regulation urea liquid flow so that the urea that different flow is sprayed under different service conditions is molten
Liquid, ammonia removal efficiency of the gas turbine engine systems under different working conditions is also ensured while rationalizing using urea；
4th, the heat exchange thermal source of refrigeration system is vented using the steam turbine of front end in afterheat utilizing system, on the one hand can be most
Limits utilize the latent heat of vaporization in combustion turbine exhaustion, improve the energy utilization efficiency of whole system, on the other hand make score
Cloth energy resource system technique it is compacter with it is flexible；
5th, gas turbine exiting flue gas initially enters air preheater, to enter heat through flue gas shunting device again after air heat-exchange
In solution room thermal source is provided to be atomized the pyrolysis of urea；Flue gas after denitration enters residual heat boiler for exchanging heat, waste heat boiler export
Two streams, 70 DEG C or so of middle warm water and 400 DEG C or so of high-temperature vapor：Middle warm water provides the user domestic water and confession
It is warm；High-temperature vapor does work into steam turbine, and the vapor after acting contains the substantial amounts of latent heat of vaporization, utilizes this part of gas
Change latent heat using steam turbine be vented import absorption refrigerating equipment in as freeze thermal source, provide the user electricity, heat and
On the basis of cold, the cascade utilization of energy is realized, improves comprehensive utilization rate of energy source, ensures system high efficiency, cleaning, environmental protection fortune
OK.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
The implication of reference：1- gas turbine engine systems, 101- air compressors, 102- air preheaters, 103- burnings
Room, 104- gas turbines, 105- flue gas shunting devices, 2- denitrating systems, 201- bucket elevators, 202- dissolving tanks, 203- delivery pumps,
204- urea solution tanks, 205- conveying EGRs, 206- flow valves, 207- metered dispensing units, 208- pyrolysis chambers, 209-
SCR reactors, 3- waste heat cold and heat supply electricity generation systems, 301- feed pumps, 302- waste heat boilers, 303- steam turbines, 304- are supplied
Hot equipment, 305- absorption refrigerating equipments, 306- cooling equipments.
The utility model is further described with reference to the accompanying drawings and detailed description.
Embodiment
Embodiment 1 of the present utility model：As shown in figure 1, a kind of utilize the combustion gas distribution energy that urea is reducing agent denitration
Source system is made up of gas turbine engine systems 1, denitrating system 2 and waste heat cold and heat supply electricity generation system 3.Gas turbine engine systems 1 are located at
The top of the system, denitrating system 2, waste heat cold and heat supply electricity generation system 3 are sequentially placed into after gas turbine engine systems 1.Denitration system
System 2 include be sequentially connected with bucket elevators 201, dissolving tank 202, delivery pump 203, urea solution tank 204, conveying EGR 205,
Flow valve 206, metered dispensing unit 207, pyrolysis chamber 208 and SCR reactors 209, flow valve 206 also with urea solution tank 204
Connection, metered dispensing unit 207, pyrolysis chamber 208 connect with gas turbine engine systems 1.Natural gas fires in gas turbine engine systems 1
Burn in the exiting flue gas of generation and a large amount of nitrogen oxides be present, the denitrating system 2 using urea as reducing agent is located at gas turbine engine systems 1
Afterwards, mainly urea pyrolysis technique is used：Gas turbine engine systems 1
Using natural gas as fuel, the gas after burning does not have flying dust, and the phenomenon of flying dust fouling will not occur into pyrolysis chamber 208, add
Its higher temperature, therefore as pyrolysis chamber 208 preferable thermal source.Distributed in urea liquid and flue gas shunting device 105
Part of smoke is mixed to form atomization urea in metered dispensing unit 207, is sprayed into by nozzle in pyrolysis chamber 208.Due to pyrolysis
The temperature requirements of room 208 are higher, directly draw another part flue gas distributed in flue gas shunting device 105 as atomization urea pyrolysis heat
Source, mixed with atomization urea and promote urea pyrolysis.Pyrolysis chamber 208 exports ammonia-flue gas mixed gas and enters SCR reactors 209,
Denitration reaction occurs in the presence of catalyst.
Gas turbine engine systems 1 include air compressor 101, air preheater 102, combustion chamber 103, the and of gas turbine 104
Flue gas shunting device 105, air compressor 101, air preheater 102, combustion chamber 103 and gas turbine 104 are sequentially connected with, combustion gas
Turbine 104, flue gas shunting device 105 are connected with air preheater 102, and flue gas shunting device 105 is also attached to metered dispensing unit
207 and pyrolysis chamber 208.The exiting flue gas of gas turbine 104 after being exchanged heat in air preheater 102 flows through flue gas shunting device 105, and one
The metered dispensing unit 207 that partial fume is imported in denitrating system 2, mist is formed with urea liquid in metered dispensing unit 207
Change urea, convenient spray into pyrolysis chamber 208 is pyrolyzed；The pyrolysis chamber 208 that remaining flue gas enters in denitrating system 2, for atomization
The pyrolysis of urea provides thermal source.This kind of mode reduces air blower and China and foreign countries of pyrolysis chamber 208 compared with traditional deamination apparatus
The configuration of heating source, has saved system cost and energy, improves system whole utilization efficiency.
Waste heat cold and heat supply electricity generation system 3 includes feed pump 301, waste heat boiler 302, steam turbine 303, heating equipment
304th, absorption refrigerating equipment 305 and cooling equipment 306, feed pump 301, waste heat boiler 302, steam turbine 303, absorption system
Cool equipment 305 and cooling equipment 306 are sequentially connected with, and waste heat boiler 302 is also respectively connected with SCR reactors 209 and heating equipment
304.In waste heat cold and heat supply electricity generation system 3, boiler feedwater is pumped into waste heat boiler 302 and denitration system by feed pump 301
2 exiting flue gas of uniting exchange heat, and the boiler feedwater after heat exchange is divided into two streams：400 DEG C or so of high-temperature vapor and 70 DEG C or so
Middle warm water.High-temperature vapor forms steam turbine exhaust into the generating acting of steam turbine 303, and steam turbine exhaust, which enters, inhales
Receipts formula refrigeration plant 305 is as refrigeration thermal source, from cooling equipment 306 to colod-application family cooling；Middle warm water is by heating equipment 304
Heat user heat supply.So far, waste heat cold and heat supply electricity generation system 3 completes the cascaded utilization of energy of medium temperature flue gas, while is heat user
Heat, cold and electric power are provided.
Embodiment 2：As shown in figure 1, using the gas distributed energy system technique that urea is reducing agent denitration using upper
The gas distributed energy system stated, including following technological process：
In gas turbine engine systems 1, air becomes pressure-air air inlet preheater after the supercharging of air compressor 101
102, the air after heating enters combustion chamber 103 and natural gas mixed combustion, after the chemical energy of fuel is fully discharged, combustion chamber
103 exiting flue gas are done work into gas turbine 104, and mechanical energy is converted into electric energy；The exiting flue gas of gas turbine 104 is as thermal source
The air in air preheater 102 is heated, the exiting flue gas of gas turbine 104 after being exchanged heat in air preheater 102 flows through flue gas
Current divider 105, the metered dispensing unit 207 that part of smoke is imported in denitrating system 2, with urea liquid in metered dispensing unit
Atomization urea is formed in 207；Remaining flue gas enters in the pyrolysis chamber 208 of denitrating system 2, and the flue gas can both be used as thermal source, again
Nitrogen oxides can be removed in denitrating system 2；
Using urea as in the denitrating system 2 of reducing agent, urea in the entrance dissolving tank 202 of bucket elevator 201 by fully dissolving
As 40%~50% urea liquid, urea liquid is pumped into urea solution tank 204 by delivery pump 203 and stored.Urea is molten
Urea liquid in flow container 204 flows into flow valve 206 through conveying EGR 205, and flow valve 206 is according to gas turbine engine systems 1
Running status adjusts urea liquid flow, and the urea liquid after the rectification of flow valve 206 is partly into metered dispensing unit
207, remainder is returned in urea solution tank 204, and the part of smoke distributed from flue gas shunting device 105 enters metering and distributed
Atomization urea is mixed to form after device 207 with urea liquid；It is atomized urea and sprays into pyrolysis via the nozzle of the porch of pyrolysis chamber 208
Room 208, the remaining flue gas distributed in pyrolysis chamber 208 by flue gas shunting device 105 are pyrolyzed to form ammonia-flue gas gaseous mixture
Body, ammonia-flue gas mixed gas, which enters in SCR reactors 209, occurs denitration reaction, carries out denitration to flue gas so that SCR reacts
Amount of nitrogen oxides reaches emission level in the exiting flue gas of device 209, subsequently enters the waste heat in waste heat cold and heat supply electricity generation system 3
Boiler 302；
In waste heat cold and heat supply electricity generation system 3, boiler feedwater becomes water under high pressure, SCR reactions after the pressurization of feed pump 301
The exiting flue gas of device 209 enters after waste heat boiler 302 exchanges heat with water under high pressure becomes the low-temperature flue gas exhaust for meeting discharge standard.Boiler
Feedwater is divided into two parts, middle warm water and high-temperature vapor after the heat exchange of waste heat boiler 302.Middle warm water enters heating equipment
Heat supply backwater is formed after 304 heat supplies；High-temperature vapor, which enters after steam turbine 303 does work, forms steam turbine exhaust, vapor wheel
Machine exhaust produces cold into absorption refrigerating equipment 305, and chilled water enters absorption refrigerating equipment 305 and absorbs cold, cooling
Chilled water afterwards, which enters after cooling equipment 306 exchanges heat, forms chilled water backwater.So far, waste heat cold and heat supply electricity generation system 3 is completed
The cascaded utilization of energy of medium temperature flue gas, while provide heat, cold and electric power for heat user.
Operation principle of the present utility model：Chemical energy is changed into electric energy and flue gas by fuel by gas turbine engine systems 1
Interior energy, it is by the flue gas shunting device 105 in gas turbine engine systems 1 that gas turbine engine systems 1 and denitrating system 2 are closely coupled.Cigarette
Flue gas in gas current divider 105 is divided into two parts, the metered dispensing unit 207 being partly into denitrating system 2, with metering point
Atomization urea is mixed to form with urea liquid in device 207；Another part flue gas carries in pyrolysis chamber 208 for atomization urea pyrolysis
Supplying heat source simultaneously forms ammonia-flue gas mixed gas with the ammonia after pyrolysis, then by the denitration of SCR reactors 209.Denitrating system 2
In, install conveying EGR 205 and flow valve 206 additional after urea solution tank 204, can be run according to gas turbine 104
Status adjustment urea liquid flow, ensure effective denitration of the gas turbine engine systems 1 under different working conditions.After denitration
Flue-gas temperature is maintained at 400~500 DEG C, and in order to improve the capacity usage ratio of whole system, the flue gas after denitration is imported into waste heat
Air is discharged into after being exchanged heat using the waste heat boiler 302 of system 3.Boiler feedwater is divided into two parts after the heat exchange of waste heat boiler 302,
Middle warm water and high-temperature vapor.Middle warm water forms heat supply backwater after entering the heat supply of heating equipment 304；High-temperature vapor, which enters, to be steamed
Steam turbine 303 forms steam turbine exhaust after doing work, steam turbine exhaust produces cold into absorption refrigerating equipment 305, cold
Matchmaker's water enters absorption refrigerating equipment 305 and absorbs cold, and temperature, which reduces, turns into low temperature refrigerant water, and low temperature refrigerant water is set into cooling
Chilled water backwater is formed after standby 306 heat exchange.The latent heat of vaporization uses during steam turbine is vented by system, improves using energy source effect
Rate.Gas turbine engine systems 1, denitrating system 2 and the efficient coupling of waste heat cold and heat supply electricity generation system 3 are simplified technique stream by the system
Journey so that gas distributed energy system nox in exhaust concentration is less than 30mg/m3, moreover it is possible to provide electricity simultaneously for user
Amount, heat and cold, the cascade utilization of energy is realized, improve comprehensive utilization rate of energy source.
Claims (3)
1. a kind of utilize the gas distributed energy system that urea is reducing agent denitration, it is characterised in that by gas turbine engine systems
(1), denitrating system (2) and waste heat cold and heat supply electricity generation system (3) composition, the gas turbine engine systems (1) are located at the system
Top, the denitrating system (2), waste heat cold and heat supply electricity generation system (3) are sequentially placed into after the gas turbine engine systems (1)；
The denitrating system (2) includes bucket elevator (201), dissolving tank (202), delivery pump (203), the urea liquid being sequentially connected with
Tank (204), conveying EGR (205), flow valve (206), metered dispensing unit (207), pyrolysis chamber (208) and SCR reactions
Device (209), the flow valve (206) are also connected with urea solution tank (204), the metered dispensing unit (207), pyrolysis chamber
(208) connected with gas turbine engine systems (1).
2. according to claim 1 utilize the gas distributed energy system that urea is reducing agent denitration, it is characterised in that
The gas turbine engine systems (1) include air compressor (101), air preheater (102), combustion chamber (103), gas turbine
(104) and flue gas shunting device (105), the air compressor (101), air preheater (102), combustion chamber (103) and combustion gas
Turbine (104) is sequentially connected with, and the gas turbine (104), flue gas shunting device (105) are connected with air preheater (102), institute
State flue gas shunting device (105) and be also attached to metered dispensing unit (207) and pyrolysis chamber (208).
3. according to claim 2 utilize the gas distributed energy system that urea is reducing agent denitration, it is characterised in that
The waste heat cold and heat supply electricity generation system (3) sets including feed pump (301), waste heat boiler (302), steam turbine (303), heat supply
Standby (304), absorption refrigerating equipment (305) and cooling equipment (306), the feed pump (301), waste heat boiler (302), steam
Turbine (303), absorption refrigerating equipment (305) and cooling equipment (306) are sequentially connected with, and the waste heat boiler (302) is also distinguished
It is connected to SCR reactors (209) and heating equipment (304).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720311733.6U CN206625897U (en) | 2017-03-28 | 2017-03-28 | Utilize the gas distributed energy system that urea is reducing agent denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720311733.6U CN206625897U (en) | 2017-03-28 | 2017-03-28 | Utilize the gas distributed energy system that urea is reducing agent denitration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206625897U true CN206625897U (en) | 2017-11-10 |
Family
ID=60208992
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720311733.6U Expired - Fee Related CN206625897U (en) | 2017-03-28 | 2017-03-28 | Utilize the gas distributed energy system that urea is reducing agent denitration |
Country Status (1)
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| CN (1) | CN206625897U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917681A (en) * | 2017-03-28 | 2017-07-04 | 中国华电科工集团有限公司 | It is the gas distributed energy system and technique of reducing agent denitration using urea |
-
2017
- 2017-03-28 CN CN201720311733.6U patent/CN206625897U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917681A (en) * | 2017-03-28 | 2017-07-04 | 中国华电科工集团有限公司 | It is the gas distributed energy system and technique of reducing agent denitration using urea |
| CN106917681B (en) * | 2017-03-28 | 2019-06-25 | 中国华电科工集团有限公司 | It is the gas distributed energy system and technique of reducing agent denitration using urea |
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Granted publication date: 20171110 Termination date: 20210328 |