CN205570100U - Hot female pipe SCR flue gas denitration system of converging - Google Patents

Hot female pipe SCR flue gas denitration system of converging Download PDF

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Publication number
CN205570100U
CN205570100U CN201620238430.1U CN201620238430U CN205570100U CN 205570100 U CN205570100 U CN 205570100U CN 201620238430 U CN201620238430 U CN 201620238430U CN 205570100 U CN205570100 U CN 205570100U
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flue gas
scr
hot manifold
flue
hot
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CN201620238430.1U
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赵卫
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SHANGHAI EAGLE NEW TECHNOLOGY ENGINEERING Co Ltd
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SHANGHAI EAGLE NEW TECHNOLOGY ENGINEERING Co Ltd
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Abstract

The utility model provides a hot female pipe SCR flue gas denitration system of converging, including hot female pipe that converges, a plurality of parallelly connected hot flue gas sources are connected with the SCR flue gas denitration device through hot female pipe of converging, and the SCR flue gas denitration device is connected with at least one hot flue gas source, forms the flue gas return circuit. All be equipped with the air door on the flue gas pipeline of hot flue gas source and hot female union coupling that converges. When chooseing high temperature modification SCR catalytic device for use, the SCR flue gas denitration device includes ammonia injection grid, SCR catalytic device, when selecting well warm type SCR catalytic device for use, the SCR flue gas denitration device includes attemperator, ammonia injection grid, SCR catalytic device. The utility model discloses a heat mode of converging to a female pipe the hot flue gas of a plurality of low capacities, and the one set of SCR flue gas denitration device that shares can reduce among the deNOx systems flue gas analysis system and ammonia injection grid's supporting quantity, the cost of greatly reduced SCR flue gas denitration system, the ammonia flow of control of also being convenient for.

Description

Hot manifold SCR flue gas denitrification system
Technical field
This utility model belongs to gas denitrifying technology field, is specifically related to a kind of multiple heat smoke source in parallel by heat Manifold merges the system using a set of SCR equipment for denitrifying flue gas, is particularly suited for separate unit generator capacity Middle-size and small-size gas gas internal-combustion engine/gas turbine power generation denitrating system less than or equal to 5MW.
Background technology
Cogeneration of heat and power distributing-supplying-energy system is the energy-provision way of a kind of high-efficiency cleaning, due to its safety, energy-conservation with The advantage such as environmental protection, balance Supply and demand relation is greatly developed.Stationary gas internal combustion engine is distributing-supplying-energy system In topmost a kind of energy supply main frame.When fuel is non-natural gas, the generating of separate unit stationary gas internal combustion engine Power is generally less than 5MW, but can consider that when supporting it is redundant, generally can be the most supporting 2 Above.
Stationary gas internal combustion engine is affected by combustion system, and NOx emission concentration is higher, and reaction was running In journey, chimney has and emits " tobacco " phenomenon.Owing to nitrogen oxides is to form acid rain, destroys atmospheric ozone layer, cause Greenhouse effect and water quality and soil property deteriorate, and cause the key factor of serious environmental pollution, and may be to the mankind's Health brings harm, and the reduction of discharging of nitrogen oxides in recent years has been included industry energy conservation in and reduced discharging in planning.
SCR selective catalytic reduction refers under the effect of catalyst, utilizes reducing agent ammonia with in flue gas NOx reaction generate N nontoxic, free of contamination2And H2O.This method of denitration with its technology maturation, safety, Denitration efficiency height is widely applied.
At present SCR flue gas denitrification system, be a supporting a set of SCR denitrating flue gas in heat smoke source Device.When the heat smoke source that multiple capacity are less needs denitration, such as multiple stage stationary gas I. C. engine exhaust Denitration, owing to separate unit I. C. engine exhaust amount is less, the ammonia amount of needs is the least, and the flow of ammonia is difficult to obtain Control.Excess of ammonia not only increases operating cost, and can bring secondary pollution.It addition, every cover system is all The CEMS flue gas analysis system of necessary matched price costliness and AIG ammonia-spraying grid, denitrating system initial cost is relatively Greatly, relatively costly.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of low cost, and is easy to what ammonia flow controlled SCR flue gas denitrification system.
In order to solve above-mentioned technical problem, the technical solution of the utility model is to provide a kind of hot manifold SCR Flue gas denitrification system, it is characterised in that: including hot manifold, heat sink stream is passed through in the heat smoke source of multiple parallel connections Female pipe is connected with SCR equipment for denitrifying flue gas, and SCR equipment for denitrifying flue gas is connected with at least one heat smoke source, Form flue gas circuit.
Preferably, the heat smoke source of the plurality of parallel connection is respectively by flue with described hot manifold even Connect, the flue that each described heat smoke source is connected with hot manifold is equipped with air door.
Preferably, described air door is two air doors or three air doors;When for three air doors, one of them is other Logical interface, bypass bypasses adjusting means exactly, can fall partial fume by bypass, as regulation flue gas temperature The means of degree.The flue gas of bypass by flue or directly can be connected discharge with chimney, and the flue gas of bypass is also Can again access in heat smoke.
Preferably, when the flue-gas temperature in described heat smoke source is more than 420 degree, and described SCR catalyst dress When being set to the high temperature modification more than 420 DEG C, described SCR equipment for denitrifying flue gas includes that ammonia-spraying grid, SCR are catalyzed Agent device, described hot manifold, ammonia-spraying grid, SCR catalyst device are sequentially connected with by flue.
Preferably, when the flue-gas temperature in described heat smoke source is more than 420 degree, and described SCR catalyst dress When being set to the middle warm type of 300 DEG C-420 DEG C, described SCR equipment for denitrifying flue gas include register, ammonia-spraying grid, SCR catalyst device.
Preferably, described hot manifold, register, ammonia-spraying grid, SCR catalyst device pass through cigarette Feed channel is sequentially connected with.
Preferably, described hot manifold, ammonia-spraying grid, register, SCR catalyst device pass through cigarette Feed channel is sequentially connected with.
Preferably, be located at described air door described in, register, hot manifold, ammonia-spraying grid, SCR urge Agent device is sequentially connected with by flue.
Preferably, described register is heat exchanger, flue gas bypass regulation, the one added during cold wind regulates Or several combinations.
Preferably, described heat exchanger is flue gas-air heat exchanger, gas-water vapour heat exchanger, flue gas-conduction oil The combination of one or more in heat exchanger.
Preferably, the supporting waste heat recovery device in described heat smoke source.
Preferably, described register can be external autonomous device, it is possible to be the parts in flue gas flow.
The system that this utility model provides overcomes the deficiencies in the prior art, by multiple little by the way of heat sink stream The heat smoke of capacity is flowed to a female pipe, shares a set of SCR equipment for denitrifying flue gas, it is possible to reduce denitration system In system, flue gas analysis system and the supporting quantity of ammonia-spraying grid, be substantially reduced the cost of SCR flue gas denitrification system, Also allow for the control of ammonia flow.
Accompanying drawing explanation
The hot manifold SCR flue gas denitrification system schematic diagram that Fig. 1 provides for embodiment 1;
The hot manifold SCR flue gas denitrification system schematic diagram that Fig. 2 provides for embodiment 2;
The hot manifold SCR flue gas denitrification system schematic diagram that Fig. 3 provides for embodiment 3;
The hot manifold SCR flue gas denitrification system application schematic diagram that Fig. 4 provides for embodiment 4.
Detailed description of the invention
Below in conjunction with specific embodiment, this utility model is expanded on further.Should be understood that these embodiments are only used for This utility model is described rather than limits scope of the present utility model.In addition, it is to be understood that reading this practicality After the content of novel instruction, this utility model can be made various changes or modifications by those skilled in the art, this A little equivalent form of values fall within the application appended claims limited range equally.
Embodiment 1
The hot manifold SCR flue gas denitrification system schematic diagram that Fig. 1 provides for embodiment 1, this kind of mode is not Configuration waste heat recovery device.
Described hot manifold SCR flue gas denitrification system is by female by heat sink stream for multiple heat smoke sources in parallel Pipe merges a set of SCR equipment for denitrifying flue gas of use.SCR equipment for denitrifying flue gas includes ammonia-spraying grid 5, SCR Catalyst-assembly 6.
Multiple heat smoke sources 1 in parallel are connected with hot manifold 3 by flue respectively, each heat smoke source It is respectively arranged with air door 2 on 1 flue being connected with hot manifold 3.Hot manifold 3, ammonia-spraying grid 5, SCR catalyst device 6 is sequentially connected with by flue, SCR equipment for denitrifying flue gas and at least one hot cigarette Source of the gas connects, and forms flue gas circuit.
Before ammonia-spraying grid 5 is arranged in SCR catalyst device 6.
When flue-gas temperature is more than 420 degree, can directly make when selecting high temperature modification (more than 420 DEG C) SCR catalyst With.
When flue-gas temperature is more than 420 degree, in selection during warm type (320 DEG C~420 DEG C) SCR catalyst, need Flue-gas temperature is adjusted in tolerance band by configuration register.
Register can be in the way of being by-passing part flue gas.
Register can also be the mode directly joining in flue gas by air and/or low warm air.
Register can also is that heat exchanger.Heat exchanger can be flue gas-air heat exchanger, gas-water vapour The combination of one or more in heat exchanger, flue gas-heat-condutive oil heat exchanger.
Register can be external autonomous device, it is also possible to be parts in heat smoke flow process.
Embodiment 2
The hot manifold SCR flue gas denitrification system schematic diagram that Fig. 2 provides for embodiment 2, this kind of mode is fitted It is arranged in the occasion after hot manifold together in waste heat recovery device.
Described hot manifold SCR flue gas denitrification system is by female by heat sink stream for multiple heat smoke sources in parallel Pipe merges a set of SCR equipment for denitrifying flue gas of use.SCR equipment for denitrifying flue gas includes register 4, spray ammonia Grid 5, SCR catalyst device 6.
Multiple heat smoke sources 1 in parallel are connected with hot manifold 3 by flue respectively, each heat smoke source It is respectively arranged with air door 2 on 1 flue being connected with hot manifold 3.Hot manifold 3, register 4, Ammonia-spraying grid 5, SCR catalyst device 6 are sequentially connected with by flue, SCR equipment for denitrifying flue gas with extremely A few heat smoke source connects, and forms flue gas circuit.
Register can be method of temperature control air and/or low warm air being added directly in flue gas.
Register can also is that the combination hands that heat exchanger, air and/or low warm air are added directly in flue gas Section.Heat exchanger can be in flue gas-air heat exchanger, gas-water vapour heat exchanger, flue gas-heat-condutive oil heat exchanger The combination of one or more.
Register can be external autonomous device, it is also possible to be parts in heat smoke flow process.
Before register 4 is arranged in SCR catalyst device 6.
Before ammonia-spraying grid 5 is arranged in SCR catalyst device 6, and it is positioned on hot manifold, can arrange After register 4 (as shown in Figure 2), it is possible to before being arranged in register 4.
Embodiment 3
The hot manifold SCR flue gas denitrification system schematic diagram that Fig. 3 provides for embodiment 3, this kind of mode is fitted Together in middle warm type (300 DEG C-420 DEG C) SCR catalyst, register is arranged on heat smoke arm.SCR Equipment for denitrifying flue gas includes ammonia-spraying grid 5, SCR catalyst device 6.
Multiple heat smoke sources 1 in parallel are connected with hot manifold 3 by flue respectively, each heat smoke source Air door 2, register 4, air door 2, homoiothermic dress are installed on 1 flue being connected with hot manifold 3 Put 4, hot manifold 3, ammonia-spraying grid 5, SCR catalyst device 6 are sequentially connected with by flue, SCR equipment for denitrifying flue gas is connected with at least one heat smoke source, forms flue gas circuit.
When air door 2 is three air door, can be by by-passing part flue gas as a kind of hands controlling flue-gas temperature Section, namely bypasses method of temperature control.
Register can be method of temperature control air and/or low warm air being added directly in flue gas.
Register can also is that heat exchanger, air and/or low warm air are added directly in flue gas, bypass tune The suites of measure of temperature.Heat exchanger can be flue gas-air heat exchanger, gas-water vapour heat exchanger, flue gas-heat conduction The combination of one or more in oil heat exchanger.
Register can be external autonomous device, it is also possible to be parts in heat smoke flow process.
Embodiment 4
Below to be applied to the denitration of maximum river, the Gas Power Plant Jincheng, Shanxi temple Gas Power Plant in the whole nation As a example by system, it is specifically described the hot manifold SCR equipment for denitrifying flue gas that the present embodiment provides.
In Jincheng, Shanxi Si He gas electricity company limited is mounted with the G3520C combustion gas of 60 Caterpillars altogether Combustion engine group, the aerofluxus of every gas internal-combustion engine is connected by flue and three air doors, every 5 three air doors After flue gas be flowed to hot manifold, access waste heat recovery device, this project has put into and has made for 2008 With.
In order to remove " tobacco " phenomenon of gas internal-combustion engine at all, intend using selectivity to urge existing smoke evacuation system Change reducing process SCR and carry out denitration.
The hot manifold SCR flue gas denitrification system application schematic diagram that Fig. 4 provides for the present embodiment, including five Platform gas electricity generator, 5 three air doors, the flue gas circuit of 1 waste heat recovery device composition, SCR cigarette The parts ammonia-spraying grid of gas denitrification apparatus, register, SCR catalyst device are sequentially arranged in waste heat recovery In flue after utilizing the superheater section of device, before evaporator part.
The heat smoke discharged from 5 gas engines, is connected by flue and three air doors, 5 respectively After three air doors heat smoke out is flowed to heat sink stream flue gas mother's pipe, order passes through superheater, ammonia-spraying grid, tune Air is entered by chimney after temperature device, SCR catalyst device, vaporizer and economizer.
In the present embodiment, register is gas-water heat exchanger, and after being arranged in superheater, as flue gas stream Parts in journey, its heat-transfer surface becomes the ingredient of former evaporating heating surface.Owing to this project is transformation item Mesh, and waste heat recovery device is controlled plant, too big for avoiding original system is changed, this register Water side from becoming closed circuit.A water pipe is introduced to register from the down-comer of former waste heat recovery device Drum water side access former heat recovery as the source of the water of register, the steam that register produces The main steam pipe of device, is heated to the design parameter of former waste heat recovery device in the superheater.
In the present embodiment, before ammonia-spraying grid is arranged in temperature adjusting evaporator, SCR catalyst device is that Cornetech is (beautiful State is healthy and free from worry) in warm type catalyst-assembly.
Full factory of Jincheng, Shanxi Si He gas electricity company limited is the most supporting, and the 12 hot manifold SCR flue gases of set take off Nitre system.
In the present embodiment, the size of the exhaust uptake of every electromotor is DN300, and the size of three air doors is DN300, the size of hot manifold is DN1200.

Claims (10)

1. a hot manifold SCR flue gas denitrification system, it is characterised in that: include hot manifold (3), The heat smoke source (1) of multiple parallel connections is connected with SCR equipment for denitrifying flue gas by hot manifold (3), SCR Equipment for denitrifying flue gas is connected with at least one heat smoke source (1), forms flue gas circuit.
A kind of hot manifold SCR flue gas denitrification system the most as claimed in claim 1, it is characterised in that: institute The heat smoke source (1) stating multiple parallel connection is connected, often with described hot manifold (3) by flue respectively It is equipped with air door (2) on the flue that individual described heat smoke source (1) is connected with hot manifold (3).
A kind of hot manifold SCR flue gas denitrification system the most as claimed in claim 2, it is characterised in that: institute Stating air door (2) is two air doors or three air doors;When for three air doors, one of them is the interface of bypass, Bypass bypasses adjusting means exactly, and the flue gas of bypass is connected with chimney or former heat smoke source (1) by flue Connect.
A kind of hot manifold SCR flue gas denitrification system the most as claimed in claim 1 or 2, it is characterised in that: When the flue-gas temperature of described heat smoke source (1) is more than 420 degree, and SCR catalyst device (6) is selected big When the high temperature modification catalyst-assembly of 420 DEG C, described SCR equipment for denitrifying flue gas include ammonia-spraying grid (5), SCR catalyst device (6), described hot manifold (3), ammonia-spraying grid (5), SCR catalyst device (6) it is sequentially connected with by flue.
A kind of hot manifold SCR flue gas denitrification system the most as claimed in claim 2, it is characterised in that: when The flue-gas temperature of described heat smoke source (1) is more than 420 degree, and SCR catalyst device (6) selects 300 During the middle warm type catalyst-assembly of DEG C-420 DEG C, described SCR equipment for denitrifying flue gas include hot manifold (3), Register (4), ammonia-spraying grid (5), SCR catalyst device (6).
A kind of hot manifold SCR flue gas denitrification system the most as claimed in claim 5, it is characterised in that: institute State hot manifold (3), register (4), ammonia-spraying grid (5), SCR catalyst device (6) pass through Flue is sequentially connected with.
A kind of hot manifold SCR flue gas denitrification system the most as claimed in claim 5, it is characterised in that: institute State hot manifold (3), ammonia-spraying grid (5), register (4), SCR catalyst device (6) pass through Flue is sequentially connected with.
A kind of hot manifold SCR flue gas denitrification system the most as claimed in claim 5, it is characterised in that: institute State air door (2), register (4), hot manifold (3), ammonia-spraying grid (5), SCR catalyst dress Put (6) to be sequentially connected with by flue.
9. the one hot manifold SCR flue gas denitrification system as described in any one of claim 5-8, its feature exists In: described register (4) be heat exchanger, flue gas bypass regulation, the one added in cold wind regulation or Several combinations.
A kind of hot manifold SCR flue gas denitrification system the most as claimed in claim 9, it is characterised in that: institute Stating heat exchanger is the one in flue gas-air heat exchanger, gas-water vapour heat exchanger, flue gas-heat-condutive oil heat exchanger Or several combinations.
CN201620238430.1U 2016-03-25 2016-03-25 Hot female pipe SCR flue gas denitration system of converging Active CN205570100U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105597539A (en) * 2016-03-25 2016-05-25 上海益格新技术工程有限公司 SCR (Selective Catalytic Reduction) flue gas denitration system of hot confluence main pipe
CN115121101A (en) * 2022-04-25 2022-09-30 江苏国信靖江发电有限公司 Method for adjusting temperature of smoke inlet end of SCR (selective catalytic reduction) system in thermal power generating unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105597539A (en) * 2016-03-25 2016-05-25 上海益格新技术工程有限公司 SCR (Selective Catalytic Reduction) flue gas denitration system of hot confluence main pipe
CN115121101A (en) * 2022-04-25 2022-09-30 江苏国信靖江发电有限公司 Method for adjusting temperature of smoke inlet end of SCR (selective catalytic reduction) system in thermal power generating unit
CN115121101B (en) * 2022-04-25 2023-10-10 江苏国信靖江发电有限公司 Method for adjusting temperature of smoke inlet end of SCR (selective catalytic reduction) system in thermal power unit

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