CN106917681B - It is the gas distributed energy system and technique of reducing agent denitration using urea - Google Patents
It is the gas distributed energy system and technique of reducing agent denitration using urea Download PDFInfo
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- CN106917681B CN106917681B CN201710193500.5A CN201710193500A CN106917681B CN 106917681 B CN106917681 B CN 106917681B CN 201710193500 A CN201710193500 A CN 201710193500A CN 106917681 B CN106917681 B CN 106917681B
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- 239000004202 carbamide Substances 0.000 title claims abstract description 100
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 98
- 239000003546 flue gas Substances 0.000 claims abstract description 85
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 76
- 238000000197 pyrolysis Methods 0.000 claims abstract description 50
- 239000002918 waste heat Substances 0.000 claims abstract description 48
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 230000005611 electricity Effects 0.000 claims abstract description 27
- 239000000567 combustion gas Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 44
- 239000007788 liquid Substances 0.000 claims description 29
- 238000010521 absorption reaction Methods 0.000 claims description 18
- 238000000889 atomisation Methods 0.000 claims description 17
- 238000002485 combustion reaction Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 17
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 14
- 239000000779 smoke Substances 0.000 claims description 8
- 239000003345 natural gas Substances 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000008901 benefit Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 41
- 230000008569 process Effects 0.000 abstract description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000005057 refrigeration Methods 0.000 description 6
- 229910021529 ammonia Inorganic materials 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 238000009834 vaporization Methods 0.000 description 4
- 230000008016 vaporization Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- 239000000908 ammonium hydroxide Substances 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 230000009615 deamination Effects 0.000 description 2
- 238000006481 deamination reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/006—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the sorption type system
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
- Thermal Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Treating Waste Gases (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a kind of gas distributed energy system and technique, it is especially a kind of using urea be reducing agent denitration gas distributed energy system and technique, belong to combustion gas distributed energy energy supply technical field.This system is made of gas turbine engine systems, denitrating system and waste heat cold and heat supply electricity generation system, and gas turbine engine systems are set to 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.Denitrating system includes that sequentially connected bucket elevator, dissolving tank, delivery pump, urea solution tank, conveying circulator, flow valve, metered dispensing unit, pyrolysis chamber and SCR reactor, metered dispensing unit, pyrolysis chamber are connected to gas turbine engine systems.The present invention 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；Electricity, heat and cooling capacity can also be provided simultaneously for user, improve comprehensive utilization rate of energy source.
Description
Technical field
The present invention relates to a kind of gas distributed energy system and techniques, especially a kind of to utilize urea for reducing agent denitration
Gas distributed energy system and technique, belong to combustion gas distributed energy energy supply technical field.
Background technique
With China's expanding economy, the spies such as tradition centralization coal-burning power plant comprehensive utilization ratio is low, environmental-protecting performance is poor
Point gradually exposes, and 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 cleaning, energy supply side local use.Combustion gas is distributed
Energy fuel is natural gas, and natural gas can generate 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, generally uses and improves combustion technology to achieve the effect that certain denitrification that goes, but is 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 relatively low, nitrogen oxygen
Emission request is not achieved in compound, and environmental-protecting performance is poor.
Summary of the invention
It is the gas distributed energy system and work of reducing agent denitration that the object of the present invention is to provide a kind of using urea
Skill.The present invention couples gas turbine engine systems, denitrating system and waste heat cold and heat supply electricity generation system equipment moduleization, goes out to system
Mouth flue gas carries out denitration process, further decreases the discharge of nitrogen oxides in gas distributed energy system unit, guarantees unit
Discharge 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 step benefit of energy
With providing electricity, heat and cooling capacity simultaneously for user, improve comprehensive utilization rate of energy source.
In order to solve the above technical problems, the present invention adopts the following technical scheme that:
It is a kind of using urea be reducing agent denitration gas distributed energy system by gas turbine engine systems, denitrating system and
Waste heat cold and heat supply electricity generation system composition, the gas turbine engine systems are set to the top of the system, and the denitrating system, waste heat supply
It is cold to be sequentially placed into after the gas turbine engine systems for heat generating system.The denitrating system include sequentially connected bucket elevator,
Dissolving tank, delivery pump, urea solution tank, conveying circulator, flow valve, metered dispensing unit, pyrolysis chamber and SCR reactor,
The flow valve is also connect with urea solution tank, and the metered dispensing unit, pyrolysis chamber are connected to gas turbine engine systems.Denitration
The reducing agent that system mainly selects has pure ammonia, ammonium hydroxide and urea, compared to pure ammonia and ammonium hydroxide, urea have it is nontoxic, harmless, without quick-fried
The features such as fried.Meanwhile urea is considered in transport, storage without safety and risk, safety coefficient is high.By urea liquid spirt
Realize that redox reaction can also avoid ammonia from causing personnel to hurt during power plant's storage and pipeline, valve leaks in pyrolysis chamber
Evil has preferable security context using the denitrating system that urea is reducing agent.Nitrogen oxides is mainly by gas turbine engine systems
Burning generates, and the amount of nitrogen oxides changes with gas turbine engine systems operating condition difference.Using urea as the denitration of reducing agent
System is located at after gas turbine engine systems, urea pyrolysis technique is mainly used, after the directly quick heating atomization of urea pyrolysis technique
Urea liquid, have many advantages, such as to track unit load variations fast speed, the response time is short.
Gas turbine engine systems above-mentioned 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 connect with air preheater, the flue gas shunting device is also attached to metered dispensing unit and pyrolysis chamber.It is changed in air preheater
Gas turbine exiting flue gas after heat flows through flue gas shunting device, and part of smoke imports the metered dispensing unit in denitrating system,
Atomization urea is formed in metered dispensing unit with urea liquid；Remaining flue gas enters the pyrolysis chamber in denitrating system, for atomization
The pyrolysis of urea provides heat 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.
Waste heat cold and heat supply electricity generation system above-mentioned includes feed pump, waste heat boiler, steam turbine, heating equipment, absorption
Formula refrigeration equipment 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 in SCR reactor 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 exchanges 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 power generation acting, steam turbine exhaust enter absorption refrigerating equipment and as high temperature heat source produce cooling capacity, from cooling equipment to colod-application
Family cooling supply.
Combustion gas distributed energy above-mentioned is used using the gas distributed energy system technique that urea is reducing agent denitration
System, including following process flow:
In gas turbine engine systems, air enters air preheater after air compressor compresses, and the air after heating enters
Combustion chamber and natural gas are mixed and burned, by the chemical energy of fuel be converted into flue gas it is interior can, after full combustion, combustor exit cigarette
Gas enters gas turbine acting, converts electric energy for mechanical energy；Gas turbine exiting flue gas heats air preheater as heat source
In air, the gas turbine exiting flue gas after exchanging heat in air preheater flows through flue gas shunting device, and part of smoke imports de-
Metered dispensing unit in nitre system forms atomization urea with urea liquid in metered dispensing unit；Remaining flue gas enters de-
Pyrolysis chamber in nitre system provides heat source to be atomized the pyrolysis of urea；
Using urea as in the denitrating system of reducing agent, urea, which enters sufficiently to dissolve in dissolving tank by bucket elevator, becomes 40%
~50% urea liquid, urea liquid are pumped into urea solution tank by delivery pump and are stored；Urea in urea solution tank is molten
Liquid is conveyed circulator and enters flow valve, and flow valve adjusts urea liquid flow, warp according to gas turbine engine systems operation conditions
Urea liquid a part after the rectification of inflow-rate of water turbine valve enters metered dispensing unit, and remainder returns in urea solution tank, from cigarette
The part of smoke that gas current divider distributes, which enters after metered dispensing unit, is mixed to form atomization urea with urea liquid；Atomization urine
Element sprays into pyrolysis chamber, the remaining flue gas distributed in pyrolysis chamber by flue gas shunting device via the nozzle at chamber entrance
Pyrolysis forms ammonia-flue gas mixed gas, and ammonia-flue gas mixed gas, which enters in SCR reactor, occurs denitration reaction, after denitration
Flue gas enter the waste heat boiler in waste heat cold and heat supply electricity generation system；
In waste heat cold and heat supply electricity generation system, boiler feedwater becomes high pressure water after feed pump pressurizes, and SCR reactor goes out
Mouth flue gas and high pressure water become the flue gas for meeting discharge standard after entering residual heat boiler for exchanging heat, i.e. nitrogen oxides is lower than 30mg/m3
The exhaust of 75 DEG C or so of low-temperature flue gas, the flue gas is discharged into atmosphere.Waste heat boiler is dual-purpose double discard heat boilers, passes through it
Internal different heat exchanger tube exports two streams, 70 DEG C or so of middle warm water and 400 DEG C or so of high-temperature vapor.Middle warm water into
After entering heating equipment heat supply, heat supply return water is formed；High-temperature vapor forms steam turbine exhaust after entering steam turbine acting, steams
About 150 DEG C of gas turbine exhaust gas temperature, due to a large amount of latent heat of vaporization, into absorption refrigerating equipment as refrigeration heat
Source, chilled water also enter in absorption refrigerating equipment, the heat of steam turbine Vent absorber chilled water become saturated steam from
Absorption refrigerating equipment outlet discharge, the chilled water after cooling form chilled water return water after entering cooling equipment heat exchange.
Compared with prior art, the invention has the beneficial effects that:
1, 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 decreases the discharge amount of nitrogen oxides in unit, so that nitrogen oxides is lower than 30mg/m3's
75 DEG C or so of low-temperature flue gas is discharged into atmosphere, meets the requirement that nitrogen oxides rationally discharges, improves distributed energy resource system
Environmental-protecting performance；
2, combustion turbine exhaustion is divided into two parts, a part enters metered dispensing unit and urea liquid is mixed to form mist
To change urea, facilitates and be pyrolyzed in penetrating pyrolysis chamber, remaining flue gas enters the heat source in pyrolysis chamber as atomization urea pyrolysis, 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
Exhaust provides heat source for urea pyrolysis, reduces the configuration of pyrolysis chamber's external heat source, saves equipment investment, reduces costs；
3, the different principle of nitrogen oxides is generated according to gas turbine engine systems operating load difference, added after urea solution tank
Dress conveying circulator and flow valve regulation urea liquid flow, so that the urea for spraying into different flow under different service conditions is molten
Liquid also ensures ammonia removal efficiency of the gas turbine engine systems under different working conditions while rationalizing using urea；
4, the heat exchange heat 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 improve the energy utilization efficiency of whole system, on the other hand make score using the latent heat of vaporization in combustion turbine exhaustion
Cloth energy resource system technique it is more compact with it is flexible；
5, gas turbine exiting flue gas initially enters air preheater, to enter heat through flue gas shunting device again after air heat-exchange
Heat source is provided in solution room 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 domestic water and confession for user
It is warm；High-temperature vapor enters steam turbine acting, and the vapor after acting contains a large amount of latent heat of vaporization, utilizes this part of gas
Change latent heat will steam turbine exhaust import absorption refrigerating equipment in as refrigeration heat source, for user provide electricity, heat and
On the basis of cooling capacity, the cascade utilization of energy is realized, improve comprehensive utilization rate of energy source, guarantee system high efficiency, cleaning, environmental protection fortune
Row.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
The meaning of appended drawing reference: 1- gas turbine engine systems, 101- air compressor, 102- air preheater, 103- burning
Room, 104- gas turbine, 105- flue gas shunting device, 2- denitrating system, 201- bucket elevator, 202- dissolving tank, 203- delivery pump,
204- urea solution tank, 205- convey circulator, 206- flow valve, 207- metered dispensing unit, the pyrolysis chamber 208-, 209-
SCR reactor, 3- waste heat cold and heat supply electricity generation system, 301- feed pump, 302- waste heat boiler, 303- steam turbine, 304- are supplied
Hot equipment, 305- absorption refrigerating equipment, 306- cooling equipment.
The present invention is further illustrated with reference to the accompanying drawings and detailed description.
Specific embodiment
The embodiment of the present invention 1: as shown in Figure 1, it is a kind of using urea be reducing agent denitration combustion gas distributed energy system
System is made 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 set on this
The top of system, denitrating system 2, waste heat cold and heat supply electricity generation system 3 are sequentially placed into after gas turbine engine systems 1.Denitrating system 2 wraps
Include sequentially connected bucket elevator 201, dissolving tank 202, delivery pump 203, urea solution tank 204, conveying circulator 205, flow
Valve 206, metered dispensing unit 207, pyrolysis chamber 208 and SCR reactor 209, flow valve 206 are also connect with urea solution tank 204,
Metered dispensing unit 207, pyrolysis chamber 208 are connected to gas turbine engine systems 1.Natural gas burns life in gas turbine engine systems 1
At exiting flue gas in there are a large amount of nitrogen oxides, using urea as the denitrating system 2 of reducing agent be located at gas turbine engine systems 1 it
Afterwards, urea pyrolysis technique is mainly used:Gas turbine engine systems 1
Using natural gas as fuel, the gas after burning does not have flying dust, will not add into pyrolysis chamber 208 there is a phenomenon where flying dust fouling
Its higher temperature, therefore become pyrolysis chamber 208 ideal heat source.It is 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 pyrolysis chamber 208 by nozzle.Due to pyrolysis
208 temperature requirements of room are higher, directly draw another part flue gas distributed in flue gas shunting device 105 as atomization urea pyrolysis heat
Source mixes with atomization urea and promotes urea pyrolysis.Pyrolysis chamber 208 exports ammonia-flue gas mixed gas and enters SCR reactor 209,
Denitration reaction occurs under the effect of the catalyst.
Gas turbine engine systems 1 include air compressor 101, air preheater 102, combustion chamber 103,104 and of gas turbine
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 connect with air preheater 102, and flue gas shunting device 105 is also attached to metered dispensing unit
207 and pyrolysis chamber 208.104 exiting flue gas of gas turbine after exchanging heat in air preheater 102 flows through flue gas shunting device 105, and one
Partial fume imports the metered dispensing unit 207 in denitrating system 2, forms mist in metered dispensing unit 207 with urea liquid
Change urea, facilitates and be pyrolyzed in penetrating pyrolysis chamber 208；Remaining flue gas enters the pyrolysis chamber 208 in denitrating system 2, for atomization
The pyrolysis of urea provides heat source.This kind of mode reduces 208 China and foreign countries of air blower and pyrolysis chamber 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
304, 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 in SCR reactor 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 heat exchange, the boiler feedwater after heat exchange are 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 enters the power generation acting of steam turbine 303 and forms steam turbine exhaust, and steam turbine exhaust, which enters, inhales
Receipts formula refrigeration equipment 305 is as refrigeration heat source, from cooling equipment 306 to colod-application family cooling supply；Middle warm water passes through 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 being heat user
Heat, cooling capacity 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 process flow:
In gas turbine engine systems 1, air becomes pressure-air after the pressurization of air compressor 101 and enters air preheater
102, the air after heating enters combustion chamber 103 and natural gas is mixed and burned, after the chemical energy of fuel is sufficiently discharged, combustion chamber
103 exiting flue gas enter the acting of gas turbine 104, convert electric energy for mechanical energy；104 exiting flue gas of gas turbine is as heat source
The air in air preheater 102 is heated, 104 exiting flue gas of gas turbine after exchanging heat in air preheater 102 flows through flue gas
Current divider 105, part of smoke imports the metered dispensing unit 207 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, which not only can be used as heat source, but also
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 sufficiently dissolving
As 40%~50% urea liquid, urea liquid is pumped into urea solution tank 204 by delivery pump 203 and is stored.Urea is molten
Urea liquid in flow container 204 flows into flow valve 206 through conveying circulator 205, and flow valve 206 is according to gas turbine engine systems 1
Operating status adjusts urea liquid flow, and urea liquid a part after the rectification of flow valve 206 enters metered dispensing unit
207, remainder returns in urea solution tank 204, and the part of smoke distributed from flue gas shunting device 105 enters metering point
With being mixed to form atomization urea with urea liquid after device 207；It is atomized urea and sprays into heat via the nozzle of 208 inlet of pyrolysis chamber
Room 208 is solved, the remaining flue gas distributed in pyrolysis chamber 208 by flue gas shunting device 105 is pyrolyzed to form ammonia-flue gas mixing
Gas, ammonia-flue gas mixed gas, which enters in SCR reactor 209, occurs denitration reaction, denitration is carried out to flue gas, so that SCR is anti-
It answers amount of nitrogen oxides in 209 exiting flue gas of device to reach emission level, subsequently enters remaining in waste heat cold and heat supply electricity generation system 3
Heat boiler 302；
In waste heat cold and heat supply electricity generation system 3, boiler feedwater becomes high pressure water, SCR reaction after the pressurization of feed pump 301
209 exiting flue gas of device and high pressure water enter the low-temperature flue gas exhaust for becoming to meet discharge standard after waste heat boiler 302 exchanges heat.Boiler
Water supply 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 return water 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 enters absorption refrigerating equipment 305 and produces cooling capacity, and chilled water enters absorption refrigerating equipment 305 and absorbs cooling capacity, cooling
Chilled water afterwards, which enters after cooling equipment 306 exchanges heat, forms chilled water return water.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 heat, cooling capacity and electric power are provided for heat user.
The working principle of the invention: chemical energy is changed into the interior energy of electric energy and flue gas by gas turbine engine systems 1 by fuel,
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.Flue gas shunting
Flue gas in device 105 is divided into two parts, and a part enters the metered dispensing unit 207 in denitrating system 2, with metered dispensing unit
Urea liquid is mixed to form atomization urea in 207；Another part flue gas provides heat source in pyrolysis chamber 208 for atomization urea pyrolysis
And ammonia-flue gas mixed gas is formed with the ammonia after pyrolysis, using 209 denitration of SCR reactor.In denitrating system 2, urinating
Conveying circulator 205 and flow valve 206 are installed additional after plain NaOH solution tank NaOH 204, can be adjusted according to 104 operating status of gas turbine
Urea liquid flow guarantees effective denitration of the gas turbine engine systems 1 under different working conditions.Due to the flue-gas temperature after denitration
400~500 DEG C are maintained at, in order to improve the capacity usage ratio of whole system, the flue gas after denitration is imported into afterheat utilizing system 3
Waste heat boiler 302 exchange heat after be discharged into atmosphere.Boiler feedwater is divided into two parts after the heat exchange of waste heat boiler 302, middle warm water with
And high-temperature vapor.Middle warm water forms heat supply return water after entering 304 heat supply of heating equipment；High-temperature vapor enters steam turbine
Steam turbine exhaust is formed after 303 actings, steam turbine exhaust enters absorption refrigerating equipment 305 and produces cooling capacity, chilled water into
Enter absorption refrigerating equipment 305 and absorb cooling capacity, temperature, which reduces, becomes low temperature refrigerant water, and low temperature refrigerant water enters cooling equipment 306
Chilled water return water is formed after heat exchange.System by steam turbine be vented in the latent heat of vaporization use, improve efficiency of energy utilization.This
Invention makes 3 efficient coupling of gas turbine engine systems 1, denitrating system 2 and waste heat cold and heat supply electricity generation system, simplification of flowsheet
It obtains gas distributed energy system nox in exhaust concentration and is lower than 30mg/m3, moreover it is possible to electricity, heat are provided simultaneously for user
And cooling capacity, it realizes the cascade utilization of energy, improves comprehensive utilization rate of energy source.
Claims (5)
1. being the gas distributed energy system technique of reducing agent denitration using urea, which is characterized in that including following technique stream
Journey:
Air in gas turbine engine systems (1) enters air preheater (102) after air compressor (101) compression, after heating
Air enter combustion chamber (103) and natural gas and be mixed and burned, combustion chamber (103) exiting flue gas, which enters gas turbine (104), to be done
Function, gas turbine (104) exiting flue gas is as the air in heat source heating air preheater (102), in air preheater (102)
Gas turbine (104) exiting flue gas after heat exchange flows through flue gas shunting device (105), and part of smoke imports in denitrating system (2)
Metered dispensing unit (207), remaining flue gas enters the pyrolysis chamber (208) in denitrating system (2)；
In denitrating system (2), urea enters in dissolving tank (202) through bucket elevator (201) sufficiently to be dissolved as 40%~50%
Urea liquid, urea liquid are pumped into urea solution tank (204) by delivery pump (203) and are stored, in urea solution tank (204)
Urea liquid is rectified through conveying circulator (205) into flow valve (206), and rectification rear portion solution enters metering distribution dress
Set (207), remainder solution return urea solution tank (204), from the part of smoke that flue gas shunting device (105) distributes into
Enter metered dispensing unit (207) and is mixed to form atomization urea with urea liquid afterwards；It is atomized urea and sprays into pyrolysis chamber (208), in heat
The remaining flue gas distributed in solution room (208) by flue gas shunting device (105), it is mixed that atomization urea pyrolysis forms ammonia-flue gas
Gas is closed, ammonia-flue gas mixed gas enters SCR reactor (209) denitration, and the flue gas after denitration enters waste heat cold and heat supply hair
Waste heat boiler (302) in electric system (3).
2. it is according to claim 1 using urea be reducing agent denitration gas distributed energy system technique, feature
It is, the boiler feedwater in waste heat cold and heat supply electricity generation system (3) enters waste heat boiler after feed pump (301) pressurize
(302), flue gas becomes after entering waste heat boiler (302) and the boiler feedwater heat exchange after pressurization after SCR reactor (209) denitration
The flue gas exhaust of low temperature；Waste heat boiler (302) exports two streams by internal different heat exchanger tube, and middle warm water and high-temperature water steam
Gas, middle warm water enter heating equipment (304) heat supply, and high-temperature vapor drives steam turbine (303) operation, steam turbine exhaust and
Chilled water enters absorption refrigerating equipment (305), the heat of steam turbine Vent absorber chilled water become saturated steam from
Absorption refrigerating equipment (305) outlet discharge, the chilled water after cooling form chilled water time after entering cooling equipment (306) heat exchange
Water.
3. it is a kind of using urea be reducing agent denitration gas distributed energy system, for implementing benefit described in claim 1
With the gas distributed energy system technique that urea is reducing agent denitration, which is characterized in that by gas turbine engine systems (1), denitration
System (2) and waste heat cold and heat supply electricity generation system (3) composition, it is reducing agent that the gas turbine engine systems (1), which are set to using urea,
The top of the gas distributed energy system of denitration, the denitrating system (2), waste heat cold and heat supply electricity generation system (3) are successively set
After the gas turbine engine systems (1)；
The denitrating system (2) includes sequentially connected bucket elevator (201), dissolving tank (202), delivery pump (203), urea liquid
Tank (204), conveying circulator (205), flow valve (206), metered dispensing unit (207), pyrolysis chamber (208) and SCR reaction
Device (209), the flow valve (206) also connect with urea solution tank (204), the metered dispensing unit (207), pyrolysis chamber
(208) it is connected to gas turbine engine systems (1).
4. it is according to claim 3 using urea be reducing agent denitration gas distributed energy system, which is characterized 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 connect with air preheater (102), institute
It states flue gas shunting device (105) and is also attached to metered dispensing unit (207) and pyrolysis chamber (208).
5. it is according to claim 4 using urea be reducing agent denitration gas distributed energy system, which is characterized in that
The waste heat cold and heat supply electricity generation system (3) includes that feed pump (301), waste heat boiler (302), steam turbine (303), heat supply are set
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 reactor (209) and heating equipment (304).
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| CN109529622B (en) * | 2019-01-16 | 2023-11-14 | 北京工大环能科技有限公司 | Flue gas tail denitration system for multiple gas internal combustion engines |
| CN109999661A (en) * | 2019-04-22 | 2019-07-12 | 山西华仁通电力科技有限公司 | A kind of gas-turbine waste heat boiler denitrating system and its course of work |
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| DE19913462A1 (en) * | 1999-03-25 | 2000-09-28 | Man Nutzfahrzeuge Ag | Urea hydrolysis to generate ammonia for reducing nitrogen oxides in an exhaust gas catalytic converter comprises reacting urea with a side stream of exhaust gas |
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| CN1294670A (en) * | 1998-03-02 | 2001-05-09 | 西门子公司 | Gas and steam turbine installation and method for operating same |
| CN102935337A (en) * | 2012-11-25 | 2013-02-20 | 中国船舶重工集团公司第七一一研究所 | Urea solution online preparation device for SCR (Selective Catalytic Reduction) systems of marine diesel engines |
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