CN209287049U - Simplification SCR denitration system for gas turbine and Waste Heat Generation unit - Google Patents
Simplification SCR denitration system for gas turbine and Waste Heat Generation unit Download PDFInfo
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- CN209287049U CN209287049U CN201821763433.2U CN201821763433U CN209287049U CN 209287049 U CN209287049 U CN 209287049U CN 201821763433 U CN201821763433 U CN 201821763433U CN 209287049 U CN209287049 U CN 209287049U
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Abstract
The utility model discloses a kind of simplification SCR denitration systems for gas turbine and Waste Heat Generation unit, it includes sequentially connected urea liquid preparation system, urea liquid transportation system, urea liquid dosing system and SCR catalysis system, urea liquid preparation system includes urea dissolving tank and the disturbing flow device for being mounted on urea dissolution pot bottom, and disturbing flow device is connect with urea dissolving tank；Urea liquid transportation system includes that urea liquid storage tank, multiple urea liquid transfer pumps and flow regulator, urea liquid storage tank are connect with urea dissolving tank and urea liquid transfer pump respectively, and urea liquid transfer pump is connect with flow regulator；The urea liquid dosing system includes multiple spray guns, and the spray gun is arranged in the flue that flue gas is 350 DEG C of -650 DEG C of temperature ranges；The SCR catalysis system includes waste heat boiler and built-in SCR catalyst in the waste heat boiler；It is 320 DEG C of -420 DEG C of sections that the SCR catalyst, which is arranged in temperature in the burner hearth of waste heat boiler,.
Description
Technical field
The utility model relates to SCR denitration system fields, especially a kind of to be used for gas turbine and Waste Heat Generation machine
The simplification SCR denitration system of group.
Background technique
For at present, conventional SCR denitration system includes urea liquid preparation system, urea liquid transportation system, urea
Pyrolysis system, urea liquid dosing system, SCR reactor, soot blower system etc.；Urea liquid preparation system include urea add,
Blender, tracing system etc.；Urea liquid transportation system uses pump+regulating valve combination；Urea pyrolysis system includes urine
Plain urea liquid dosing system and urea pyrolysis furnace；SCR reactor is that flue gas is led to SCR import, flue gas warp from furnace rear pass
It is led back again after denitration process to furnace rear pass；Soot blower system includes acoustic wave ash ejector etc.；So the tediously long complexity of technique, investment is big.
Therefore, it needs further improvement.
Utility model content
The purpose of the utility model is to provide a kind of simplification SCR denitrations for gas turbine and Waste Heat Generation unit
System, it is intended to which the existing out of stock system process of SCR is tediously long in solving, the big technical problem of construction investment.
In order to achieve the above object, the technical solution of the utility model are as follows: one kind is sent out for gas turbine and waste heat boiler
The simplification SCR denitration system of motor group comprising sequentially connected urea liquid preparation system, urea liquid transportation system, urine
Plain solution dosing system and SCR catalysis system, the urea liquid preparation system includes urea dissolving tank and to be mounted on urea molten
The disturbing flow device of pot bottom is solved, the disturbing flow device is connect with urea dissolving tank；The urea liquid transportation system includes urea
Solution storage tank, multiple urea liquid transfer pumps and flow regulator, the urea liquid storage tank are dissolved with urea respectively
Tank is connected with urea liquid transfer pump, and the urea liquid transfer pump is connect with flow regulator；The urea liquid supply
Pump is frequency conversion metering pump；The urea liquid dosing system includes multiple spray guns, and the spray gun setting is 350 DEG C -650 in flue gas
In the flue of DEG C temperature range, the import of flue and the smoke evacuation of gas turbine are exported and are connected；One of import of the spray gun
Connect with flow regulator, urea liquid is transported to spray gun after the adjusting of flow regulator, spray gun another
Import is connect with compressed air supply system；The SCR catalysis system includes waste heat boiler and built-in SCR in the waste heat boiler
Catalyst；It is 320 DEG C of -420 DEG C of sections that the SCR catalyst, which is arranged in temperature in the burner hearth of waste heat boiler,.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the urea is molten
Liquid preparing system further includes urea liquid circulating pump, urea liquid circulating pump pass through respectively hand stop valve and urea dissolving tank,
Disturbing flow device is connected with urea liquid storage tank.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the flow-disturbing dress
It sets including three road disturbed flow pipes, the disturbed flow pipe is connect by casing flange with urea dissolving tank, and is inserted into urea dissolving tank part
Disturbed flow pipe be evenly distributed on the circumference of urea dissolving tank.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein insertion urea is molten
The horizontal plane of the disturbed flow pipe and urea dissolving tank that solve tank part forms the angle of 20-80 degree, and is inserted into urea dissolving tank part
Disturbed flow pipe forms 120 degree of angle between each other.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the urea is molten
Liquid transportation system further includes pressure transmitter for remotely monitoring pipeline pressure and is used to fluid flow in long-range monitoring pipeline
Electromagnetic flowmeter；The urea liquid storage tank is connect with urea liquid transfer pump respectively by hand stop valve；The urine
Plain solution transfer pump is connect with pressure transmitter respectively, and the pressure transmitter passes through in electromagnetic flowmeter and the out of stock system of SCR
Spray gun connection, the flow regulator is mounted on the top of electromagnetic flowmeter.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the urea is molten
Three road pipelines of liquid storage tank point are connect with urea liquid transfer pump, are connected between each urea liquid transfer pump and hand stop valve
It is connected to y-type filter and ball valve；The corresponding urea liquid transfer pump A of three road pipelines, urea liquid transfer pump B and urea are molten
Liquid transfer pump C.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the urea is molten
The pressure gauge on the spot for fluid pressure in display pipes on the spot is also equipped between liquid transfer pump and pressure transmitter.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the pressure becomes
It send device and pressure gauge passes through needle valve respectively and is connected on conveyance conduit on the spot.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein per pipeline all the way
In urea liquid transfer pump and between pressure gauge be sequentially installed with non-return valve and ball valve on the spot.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the urea is molten
Pass through safety valve and urine behind pressure transmitter on the corresponding two-way pipeline of liquid transfer pump B and urea liquid transfer pump C
Plain solution storage tank connection.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the safety valve
Ball valve is also connected between pressure transmitter.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the waste heat pot
SCR reactor reserved interval is provided in furnace, the SCR catalyst has been arranged in SCR reactor reserved interval, and the SCR
The temperature of reactor reserved interval is 320 DEG C -420 DEG C.
The utility model has the advantages that the utility model passes through the urea liquid for directly configuring 5% concentration, blender and tracing system are free of；
Blender, the direct chamber pot element solution circulation pump outlet of disturbing flow device, letter are replaced by dissolving pot bottom scrambling stream device in urea
Change urea preparation system, while also can guarantee the efficiency of urea dissolution；5% urea liquid can be prepared directly, be not required to add heat tracing
System saves heat source, reduces urea preparation system equipment installation cost, saves space；Further, since urea granules are added desalination
Water dissolution, the urea concentration after solution are 5%, so it is lower to prepare urea concentration, urea liquid delivery pump to spray gun
Between do not need install additional dilution water system；The urea liquid of configuration 5% simultaneously, water temperature reduces by 3.03 DEG C, so heat can be discharged
Amount can economize on resources so heat tracing can be not added in dissolution in 5% urea liquid, reduce urea preparation system equipment installation cost
And maintenance cost.Urea liquid transportation system uses the independent regulative mode of frequency conversion metering pump, makes the dosage of urea liquid with pot
Furnace load adjusts rapidly, and urea liquid is avoided to be excessively used, and reduces the escaping of ammonia.Gun system is directly to spray urea liquid
It is incident upon in flue and is pyrolyzed；Compared to Conventional urea pyrolysismethod, this technique uses gas turbine smoke evacuation as heat source, and heat source is stablized
Reliably, it solves the problems such as big energy consumption, system complex, poor controllability, guarantees SCR system efficiency；SCR catalysis system is tangible
Waste heat boiler internal temperature section after gas turbine, choose have SCR system catalyst needs temperature range (320 DEG C ~
420 DEG C), therefore SCR system can be directly arranged inside waste heat boiler burner hearth, with waste heat boiler Aided design, matching operation；If
The SCR system structure of meter simplifies, and energy investment reduction cost, guarantees the stability of SCR system.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of urea liquid preparation system in the utility model.
Fig. 2 is the section face figure of Fig. 1 in the utility model.
Fig. 3 is the structural schematic diagram of urea liquid transportation system in the utility model.
Fig. 4 is the structural schematic diagram of urea liquid dosing system and SCR catalysis system in the utility model.
Fig. 5 is the another embodiment structural schematic diagram that the utility model combines.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, clear, develop simultaneously implementation referring to the drawings
The utility model is further described in example.
As shown in Figs. 1-5, the utility model discloses a kind of simplification for gas turbine and Waste Heat Generation unit
SCR denitration system comprising sequentially connected urea liquid preparation system 1, urea liquid transportation system 2, urea liquid add
System 3 and SCR catalysis system 4, the urea liquid preparation system 1 include urea dissolving tank 11 and are mounted on urea dissolving tank 11
The disturbing flow device 12 of bottom, the disturbing flow device 12 are connect with urea dissolving tank 11；The urea liquid transportation system 2 includes urine
Plain solution storage tank 21, multiple urea liquid transfer pumps 22 and flow regulator 23, the urea liquid storage tank 21 are distinguished
It is connect with urea dissolving tank 11 and urea liquid transfer pump 22, the urea liquid transfer pump 22 connects with flow regulator 23
It connects；The urea liquid transfer pump 22 is frequency conversion metering pump；The urea liquid dosing system 3 includes multiple spray guns 31 and flue
32, the spray gun 32 is arranged in the flue 32 that flue gas is 350 DEG C of -650 DEG C of temperature ranges, the import of flue 32 and gas turbine
34 smoke evacuation exports connection；One of import of the spray gun 31 is connect with flow regulator 23, and urea liquid is through overcurrent
Spray gun 31 is transported to after the adjusting of quantity regulating device 23, another import of spray gun 31 is connect with compressed air supply system 5；
The SCR catalysis system 4 includes waste heat boiler 41 and built-in SCR catalyst 42 in the waste heat boiler；The SCR catalyst 42
Being arranged in temperature in the burner hearth of waste heat boiler 41 is 320 DEG C of -420 DEG C of sections.
Urea liquid is atomized by above-mentioned urea liquid dosing system by the strength of spray gun, then with the flue gas in flue
It is mixed, since flue-gas temperature is in urea pyrolysis temperature range, pyrolysis is NH3 after urea liquid enters flue, with cigarette
Gas enters catalyst section reaction；Directly urea liquid is sprayed to being pyrolyzed in flue, SCR denitration system can be thrown in time
Enter, and devoting rate is big；Compared to Conventional urea pyrolysismethod, use gas turbine smoke evacuation as heat source, heat source is reliable and stable；It can be straight
The concentration for reducing gas ammonia is connect, can keep gas ammonia concentration within 5%；Solve energy consumption big, system complex, poor controllability etc.
Problem guarantees SCR system efficiency.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the urea is molten
Liquid preparing system 1 further includes urea liquid circulating pump 13, and urea liquid circulating pump 13 is molten by hand stop valve 6 and urea respectively
Tank 11, disturbing flow device 12 and urea liquid storage tank 21 is solved to connect.
After adopting the above structure, the utility model adopts the bottom that disturbing flow device is mounted on to urea dissolving tank, so in tank
In the case that body diameter or height are smaller, enter in tank without service personnel and overhaul, while simplifying and preparing urea liquid
System is conveyed to disturbed flow pipe, then turns again to urine by the urea liquid in urea liquid circulating pump extracted urea dissolving tank
In plain dissolving tank.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the flow-disturbing dress
Setting 12 includes three road disturbed flow pipes 120, and the disturbed flow pipe 120 is connect by casing flange 14 with urea dissolving tank 11, and is inserted into urine
The disturbed flow pipe 120 of plain dissolving tank part is evenly distributed on the circumference of urea dissolving tank 11；Disturbed flow pipe 120 by with casing flange 14
In connection insertion urea dissolving tank 11, is conducive to overhaul disturbed flow pipe, also facilitates the installation of disturbed flow pipe.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein insertion urea is molten
The horizontal plane of the disturbed flow pipe 120 and urea dissolving tank 11 that solve tank part forms the angle of 20-80 degree, and is inserted into urea dissolving tank portion
The disturbed flow pipe 120 divided forms 120 degree of angle between each other.
It is made of simultaneously because stating disturbing flow device three disturbed flow pipes, and is uniformly mounted on the lower end of urea dissolving tank respectively；
Disturbed flow pipe constitutes one 120 ° of angle between any two；So can be realized the urea and demineralized water in stirring and dissolving tank, so that
Urea granules are sufficiently dissolved, while also can guarantee the efficiency of urea dissolution.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the urea is molten
Liquid transportation system 2 further includes pressure transmitter 24 for remotely monitoring pipeline pressure and is used to liquid flow in long-range monitoring pipeline
The electromagnetic flowmeter 25 of amount；The urea liquid storage tank 21 is connected with urea liquid transfer pump 22 respectively by hand stop valve 6
It connects；The urea liquid transfer pump 22 is connect with pressure transmitter 24 respectively, and the pressure transmitter 24 passes through electromagnetic flowmeter
25 connect with the spray gun 31 in the out of stock system of SCR, and the flow regulator 23 is mounted on the top of electromagnetic flowmeter 25.
The utility model is carried out by using pipeline of the independent regulative mode of frequency conversion metering pump to each transport urea solution
It adjusts, and monitors pipeline pressure by pressure transmitter, while using fluid flow in long-range monitoring pipeline, then with interflow
Quantity regulating device controls flow；Adjust the dosage of urea liquid rapidly with boiler load；So simple process, spirit
Sensitivity is high, reduces maintenance point, can be avoided urea liquid and be excessively used, and reduces the escaping of ammonia.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the urea is molten
Liquid storage tank 21 divides three road pipelines 7 to connect with urea liquid transfer pump 22, each urea liquid transfer pump 22 and hand stop valve 6
Between be respectively connected with y-type filter 8 and ball valve 9；The corresponding urea liquid transfer pump A 220 of three road pipeline 7, urea liquid
Transfer pump B 221 and urea liquid transfer pump C 222.
The Y-filter of the utility model is for removing the impurity in medium, to protect valve and the normal of equipment to make
With；Ball valve is mainly on-off action on pipeline.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the urea is molten
Pressure gauge 26 on the spot for fluid pressure in display pipes on the spot are also equipped between liquid transfer pump 22 and pressure transmitter 24.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the pressure becomes
It send device 24 and pressure gauge 26 is connected on conveyance conduit by needle valve 10 respectively on the spot；So a valve as instrument,
Instrument plays shutdown when overhauling.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein per pipeline all the way
In urea liquid transfer pump 22 and between pressure gauge 26 be sequentially installed with non-return valve 27 and ball valve 9 on the spot；Pass through non-return valve
It prevents medium from flowing backwards, prevents urea liquid transfer pump and drive motor from inverting.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the urea is molten
Pass through behind pressure transmitter 24 on liquid transfer pump B 221 and the corresponding two-way pipeline of urea liquid transfer pump C 222
Safety valve 28 is connect with urea liquid storage tank 21；So safety valve is released stress as pipeline compression original part, guarantee system pressure
Power is stablized, and automatically opens when over pressure, and safe release medium is simultaneously drained into suction line or chemical vessel；Urine can be protected
The safety of plain solution transfer pump and the normal operation of system；Pipeline, elbow, connector are protected simultaneously, reduces the impact of pressure oscillation.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the safety valve
Ball valve 9 is also connected between 28 and pressure transmitter 24.
The simplification SCR denitration system for gas turbine and Waste Heat Generation unit, wherein the waste heat pot
SCR reactor reserved interval 410 is provided in furnace 41, the SCR catalyst 41 has been arranged in SCR reactor reserved interval 410
In, and the temperature of the SCR reactor reserved interval is 320 DEG C -420 DEG C.
As shown in Figure 1, being provided with 110 He of urea granules import at the top of urea dissolving tank in urea liquid preparation system
The import 111 of demineralized water, and agitating paddle is directly replaced by practical disturbed flow pipe, the urea liquid of 5% concentration is directly configured, no
Containing blender and tracing system；By adding disturbing flow device to replace blender in 11 bottom of urea dissolving tank, disturbing flow device 12 is direct
Chamber pot element solution circulation pump 13 exports, and simplifies urea preparation system, while also can guarantee the efficiency of urea dissolution；5% urea is molten
Liquid can be prepared directly, be not required to plus tracing system, saving heat source reduce urea preparation system equipment installation cost, save space.
Urea in Fig. 1 and 2 dissolves working principle are as follows: when dissolved urea, urea liquid circulating-pump outlet to urea dissolves
Valve is opened between disturbed flow pipe in the tank of tank, forms circulation loop；Disturbed flow pipe and dissolving tank radius form certain angle in tank, lead to
Cross the eddy flow completion stirring that the outlet pressure of three disturbed flow pipes is formed；Dissolve tank be equipped with casing, disturbed flow pipe by with casing
Flanged joint is inserted into urea dissolving tank, and flanged joint form is conducive to overhaul disturbed flow pipe.
After urea is completely dissolved, valve between disturbed flow pipe, opens urea in closing urea liquid circulating-pump outlet to tank
Solution circulation pump is exported to valve between urea liquid storage tank, and urea liquid is transported in urea liquid storage tank.
As shown in figure 3, the conveying of urea liquid transportation system 2 uses the independent regulative mode of frequency conversion metering pump, keep urea molten
The dosage of liquid adjusts rapidly with boiler load, and urea liquid is avoided to be excessively used, and reduces the escaping of ammonia.
As shown in figure 4, urea liquid dosing system, SCR catalysis system: urea liquid dosing system is arranged according to gas turbine
The temperature range of gas, the flue 32 after gas turbine select the temperature section (350 DEG C ~ 650 DEG C temperature sections) for being suitble to urea pyrolysis,
Spray gun 31 directly sprays urea liquid to being pyrolyzed in flue 32, and SCR denitration system can be put into time, and devoting rate
Greatly；Compared to Conventional urea pyrolysismethod, this technique uses gas turbine smoke evacuation as heat source, and heat source is reliable and stable, solves the energy
The problems such as consumption is big, system complex, poor controllability, guarantees SCR system efficiency.
As for above-mentioned flue temperature range: since combustion gas gas-turbine boiler export temperature is designed by boiler producer,
The survey that can be provided by the thermodynamic computing and owner of flue gas flow, flue-gas temperature, flue thickness and flue gas heat dissipation etc.
Point temperature determines.And the utility model is preferably, and is selected by way of temperature sensor measurement.
Catalysis system has SCR system catalyst needs according to waste heat boiler internal temperature section after gas turbine, selection
Temperature range (320 DEG C ~ 420 DEG C), therefore SCR system can be directly arranged inside waste heat boiler burner hearth, be matched with waste heat boiler
Analysis of Nested Design, matching operation；The SCR system structure of design simplifies, and energy investment reduction cost, guarantees the stability of SCR system.
The utility model passes through the urea liquid for directly configuring 5% concentration, is free of blender and tracing system；By urinating
Element dissolution pot bottom scrambling stream device replaces blender, and the direct chamber pot element solution circulation pump outlet of disturbing flow device simplifies urea
Preparation system, while also can guarantee the efficiency of urea dissolution；5% urea liquid can be prepared directly, be not required to add tracing system, section
About heat source reduces urea preparation system equipment installation cost, saves space；Further, since add demineralized water to dissolve urea granules,
Urea concentration after solution is 5%, so it is lower to prepare urea concentration, urea liquid delivery pump between spray gun not
Need to install additional dilution water system；The urea liquid of configuration 5% simultaneously, water temperature reduces by 3.03 DEG C, so heat can be discharged, so
Heat tracing can be not added in dissolution in 5% urea liquid, can economize on resources, and reduce urea preparation system equipment installation cost and maintenance
Expense.Urea liquid transportation system uses the independent regulative mode of frequency conversion metering pump, makes the dosage of urea liquid with boiler load
It adjusts rapidly, urea liquid is avoided to be excessively used, reduce the escaping of ammonia.Gun system is directly to spray urea liquid to cigarette
It is pyrolyzed in road；Compared to Conventional urea pyrolysismethod, this technique uses gas turbine smoke evacuation as heat source, and heat source is reliable and stable,
It solves the problems such as big energy consumption, system complex, poor controllability, guarantees SCR system efficiency；The tangible combustion gas of SCR catalysis system
The temperature range (320 DEG C ~ 420 for having SCR system catalyst needs is chosen in waste heat boiler internal temperature section after turbine
DEG C), therefore SCR system can be directly arranged inside waste heat boiler burner hearth, with waste heat boiler Aided design, matching operation；Design
SCR system structure simplify, and can investment reduction cost, guarantee the stability of SCR system.
The denitration process process of the SCR denitrating system of the utility model are as follows:
(1) packed urea granules are applied directly to after urea dissolving tank plus demineralized water dissolves, the urea liquid after solution is dense
Degree is 5%, and dissolved urea liquid is delivered to urea liquid storage tank by urea solution pump, passes through urea from urea liquid storage tank
Solution transfer pump is adjusted and monitors the urea liquid of conveying by electromagnetic flowmeter and flow regulator, is then added to
Spray gun, lower due to preparing urea concentration, urea liquid delivery pump dilutes water system to installation is not needed between spray gun；
(2) due to (350 DEG C ~ 650 DEG C) setting spray guns of temperature section of urea pyrolysis suitable on flue, pass through pneumatic atomization
It is mixed with the flue gas in flue, since flue-gas temperature is in urea pyrolysis temperature range, urea liquid enters heat after flue
Solution is NH3, as flue gas enters catalyst section reaction；
(3) under the effect of the catalyst, reduction reaction occurs for NH3 and NOx, generates N2 and H2O without secondary pollution, with
Flue gas discharge.
Simultaneously as the urea liquid in preparation 5% can release heat, so specific heat Calculation mode are as follows:
(a) heat of solution of the urea in 20 DEG C of water: 57.8k/g, K are thermal unit card, 1K=4.18J.
(b) specific heat capacity of water is 4.2 × 1000J/ (Kg DEG C).
(c) urea liquid of configuration 5%, water temperature reduce by 3.03 DEG C.
According to heat Calculation, heat tracing can be not added in dissolution in 5% urea liquid；Directly preparing 5% urea liquid can save
Resource reduces urea preparation system equipment installation cost and maintenance cost；And tracing system is needed when traditional urea dissolution, companion
Heat needs to connect vapour system in factory, and this dissolution mechanism needs to consume steam resource, and increases maintenance cost.Therefore, this is practical
Novel installation fee and maintenance cost is less, and out of stock cost is lower.
The utility model is by the way that by adding demineralized water to dissolve urea granules, the urea concentration after solution is 5%, institute
Lower to prepare urea concentration, urea liquid delivery pump dilutes water system to installation is not needed between spray gun；It configures simultaneously
5% urea liquid, water temperature reduces by 3.03 DEG C, so heat can be discharged, so companion can be not added in dissolution in 5% urea liquid
Heat can economize on resources, and reduce urea preparation system equipment installation cost and maintenance cost.
It is preferred embodiments of the present invention above, the right of the utility model cannot be limited with this certainly
Range, it is noted that those of ordinary skill in the art, do not make the creative labor to the utility model technical side
The modification or equivalent replacement of case, without departure from the protection scope of technical solutions of the utility model.
Claims (10)
1. a kind of simplification SCR denitration system for gas turbine and Waste Heat Generation unit, which is characterized in that including successively
Urea liquid preparation system, urea liquid transportation system, urea liquid dosing system and the SCR catalysis system of connection, the urine
Plain solution preparation system include urea dissolving tank and be mounted on urea dissolution pot bottom disturbing flow device, the disturbing flow device and urine
Plain dissolving tank connection；The urea liquid transportation system includes urea liquid storage tank, multiple urea liquid transfer pumps and flow
Regulating device, the urea liquid storage tank are connect with urea dissolving tank and urea liquid transfer pump respectively, the urea liquid
Transfer pump is connect with flow regulator；The urea liquid transfer pump is frequency conversion metering pump；The urea liquid dosing system
Including multiple spray guns, the spray gun is arranged in the flue that flue gas is 350 DEG C of -650 DEG C of temperature ranges, the import and combustion gas of flue
The smoke evacuation of turbine exports connection；One of import of the spray gun is connect with flow regulator, and urea liquid is through inflow-rate of water turbine
Spray gun is transported to after the adjusting of regulating device, another import of spray gun is connect with compressed air supply system；The SCR is urged
Change system includes waste heat boiler and built-in SCR catalyst in the waste heat boiler；The SCR catalyst is arranged in waste heat boiler
Temperature is 320 DEG C of -420 DEG C of sections in burner hearth.
2. the simplification SCR denitration system according to claim 1 for gas turbine and Waste Heat Generation unit, special
Sign is that the urea liquid preparation system further includes urea liquid circulating pump, and urea liquid circulating pump passes through respectively to be cut manually
Only valve is connect with urea dissolving tank, disturbing flow device and urea liquid storage tank.
3. the simplification SCR denitration system according to claim 2 for gas turbine and Waste Heat Generation unit, special
Sign is that the disturbing flow device includes three road disturbed flow pipes, and the disturbed flow pipe is connect by casing flange with urea dissolving tank, and is inserted
The disturbed flow pipe for entering urea dissolving tank part is evenly distributed on the circumference of urea dissolving tank.
4. the simplification SCR denitration system according to claim 3 for gas turbine and Waste Heat Generation unit, special
Sign is that the horizontal plane of the disturbed flow pipe and urea dissolving tank that are inserted into urea dissolving tank part forms the angle of 20-80 degree, and is inserted into
The disturbed flow pipe of urea dissolving tank part forms 120 degree of angle between each other.
5. the simplification SCR denitration system according to claim 1 for gas turbine and Waste Heat Generation unit, special
Sign is, the urea liquid transportation system further includes pressure transmitter for remotely monitoring pipeline pressure and is used to long-range prison
The electromagnetic flowmeter of fluid flow in keyholed back plate road；The urea liquid storage tank is supplied with urea liquid respectively by hand stop valve
Connection should be pumped；The urea liquid transfer pump is connect with pressure transmitter respectively, and the pressure transmitter passes through electromagnetic flowmeter
It is connect with the spray gun in the out of stock system of SCR, the flow regulator is mounted on the top of electromagnetic flowmeter.
6. the simplification SCR denitration system according to claim 5 for gas turbine and Waste Heat Generation unit, special
Sign is, three road pipelines of the urea liquid storage tank point are connect with urea liquid transfer pump, each urea liquid transfer pump and
Y-type filter and ball valve are respectively connected between hand stop valve；The corresponding urea liquid transfer pump A of three road pipelines, urea
Solution transfer pump B and urea liquid transfer pump C.
7. the simplification SCR denitration system according to claim 6 for gas turbine and Waste Heat Generation unit, special
Sign is, is also equipped between the urea liquid transfer pump and pressure transmitter for fluid pressure in display pipes on the spot
Pressure gauge on the spot.
8. the simplification SCR denitration system according to claim 7 for gas turbine and Waste Heat Generation unit, special
Sign is, is sequentially installed with non-return valve and ball valve per the urea liquid transfer pump in pipeline all the way and on the spot between pressure gauge.
9. the simplification SCR denitration system according to claim 8 for gas turbine and Waste Heat Generation unit, special
Sign is, after the pressure transmitter on the urea liquid transfer pump B and the corresponding two-way pipeline of urea liquid transfer pump C
Face is connect by safety valve with urea liquid storage tank.
10. the simplification SCR denitration system according to claim 1 for gas turbine and Waste Heat Generation unit,
It is characterized in that, SCR reactor reserved interval is provided in the waste heat boiler, and the SCR catalyst has been arranged in SCR reactor
In reserved interval, and the temperature of the SCR reactor reserved interval is 320 DEG C -420 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109173723A (en) * | 2018-10-30 | 2019-01-11 | 中国海洋石油集团有限公司 | Simplification SCR denitration system for gas turbine and Waste Heat Generation unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109173723A (en) * | 2018-10-30 | 2019-01-11 | 中国海洋石油集团有限公司 | Simplification SCR denitration system for gas turbine and Waste Heat Generation unit |
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