CN107029543A - A kind of waste incinerator non-catalytic reduction flue gas denitrification system for being used to reclaim useless ammonia - Google Patents
A kind of waste incinerator non-catalytic reduction flue gas denitrification system for being used to reclaim useless ammonia Download PDFInfo
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- CN107029543A CN107029543A CN201510472867.1A CN201510472867A CN107029543A CN 107029543 A CN107029543 A CN 107029543A CN 201510472867 A CN201510472867 A CN 201510472867A CN 107029543 A CN107029543 A CN 107029543A
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- ammoniacal liquor
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Abstract
A kind of waste incinerator non-catalytic reduction flue gas denitrification system for being used to reclaim useless ammonia, in order to solve the deposed ammonia produced in rubbish leachate processing procedure because concentration is relatively low, requirement of the non-catalytic reduction flue gas denitrification system to ammonia concn this problem can not be met, the present invention proposes a kind of the low concentration deposed ammonia produced in rubbish leachate processing procedure can be applied to the technical scheme of non-catalytic reduction flue gas denitrification system.Increase useless ammonia feedway in existing non-catalytic reduction flue gas denitrification system, the ammonia feedway that gives up mainly includes deposed ammonia tank, deposed ammonia valve, deposed ammonia pipeline；When in the state of useless ammonia reuse, under the control of SNCR control systems, deposed ammonia replaces soft water to be mixed to form the ammoniacal liquor that concentration is 5% in mixing tube and ammoniacal liquor through deposed ammonia pipeline and then spray incinerator correct position and plays denitration, so as to efficiently solve processing and the denitration problem of incinerator smoke of the useless ammonia of rubbish leachate, useless recovery ammonia is utilized, turned waste into wealth.
Description
Technical field
The present invention relates to a kind of non-catalytic reduction flue gas denitrification system, more particularly to a kind of waste incinerator non-catalytic reduction flue gas for being used to reclaim useless ammonia
Denitration (SNCR) system.
Background technology
Non-catalytic reduction denitrating flue gas (SNCR) system is a kind of system for removing NOx in waste incinerator, and the system uses about 25% ammonia
Water is mixed into the ammoniacal liquor that concentration is 5%, and the correct position that 5% ammoniacal liquor is sprayed into waste incineration burner hearth with soft water, is reacted with NOx therein
Reach the purpose of NOx in removing flue gas.
Existing non-catalytic reduction denitrating flue gas (SNCR) system mainly includes ammoniacal liquor feedway, soft water feedway, mixing tube and front-end branches spray
Pipe, in addition to for controlling the control device of ammoniacal liquor feedway and soft water feedway, ammoniacal liquor feedway mainly include ammonia water tank, ammoniacal liquor valve,
Aqua ammonia pump, ammoniacal liquor pipeline, soft water feedway mainly include water softening tank, soft water valve, softened water pump, soft water pipeline, under SNCR control, ammonia
Penstock and soft water valve are opened, and concentration is that 25% ammoniacal liquor enters mixing tube with entering the soft water of mixing tube through soft water pipeline from water softening tank through ammoniacal liquor pipeline
The ammoniacal liquor that concentration is 5% is mixed to form, the correct position of burner hearth is then injected in from each branch's jet pipe.
During waste incineration and generating electricity, rubbish leachate can be produced during due to sanitary fill, accordingly, it would be desirable to handle rubbish leachate.
2%-3% deposed ammonia can be produced in the processing procedure of rubbish leachate, because the deposed ammonia concentration is relatively low, it is impossible to meet non-catalytic reduction flue gas and take off
Requirement of the nitre system to ammonia concn, and transport outward not high using then economic value.
The content of the invention
In order to solve the deposed ammonia produced in rubbish leachate processing procedure because concentration is relatively low, it is impossible to meet non-catalytic reduction flue gas denitrification system to ammonia
This problem of the requirement of water concentration, present invention proposition is a kind of to be applied to on-catalytic by the low concentration deposed ammonia produced in rubbish leachate processing procedure
Reduce the technical scheme of flue gas denitrification system.Increase useless ammonia feedway in non-catalytic reduction flue gas denitrification system, useless ammonia feedway mainly includes
Deposed ammonia tank, deposed ammonia valve, deposed ammonia pipeline；When in the state of useless ammonia reuse, under SNCR control, deposed ammonia replaces soft water through useless
Ammoniacal liquor pipeline is mixed to form the ammoniacal liquor that concentration is 5% and then sprays incinerator correct position in mixing tube and ammoniacal liquor plays denitration, so as to effectively solve
Certainly the denitration problem of the processing of the useless ammonia of rubbish leachate and incinerator smoke, useless recovery ammonia is utilized, turned waste into wealth.
The technical scheme of the present invention that solves the problems, such as to use is, a kind of to be used to reclaim the waste incinerator non-catalytic reduction flue gas denitrification system of useless ammonia, including
Ammoniacal liquor feedway, soft water feedway, mixing tube and the front-end branches jet pipe being connected with mixing tube in furnace is arranged on, in addition to for controlling ammonia
The control device of water feeder and soft water feedway, the ammoniacal liquor feedway is mainly including the ammonia water tank set gradually, ammoniacal liquor valve, ammoniacal liquor
Pump and ammoniacal liquor pipeline, the soft water feedway mainly include water softening tank, soft water valve, softened water pump and the soft water pipeline set gradually, and it is special
Levying is, also sets up the deposed ammonia feedway controlled by the control device, deposed ammonia tank that the deposed ammonia feedway mainly includes setting gradually,
Deposed ammonia pipeline after deposed ammonia valve and deposed ammonia pipeline, the deposed ammonia valve, which is linked into soft water pipeline, to be constituted soft water and deposed ammonia and connects
Manage and access point is located between soft water valve and softened water pump, then by soft water and deposed ammonia and be linked into again in the ammoniacal liquor pipeline after aqua ammonia pump
The mixing tube is constituted, when in the state of useless ammonia reuse, under the control of the control device, deposed ammonia replaces soft water through useless ammonia pipeline mixed
Close pipe and be mixed to form the ammoniacal liquor that concentration is 5% with ammoniacal liquor, the correct position of burner hearth is then injected in from each branch's jet pipe,
The deposed ammonia tank is connected by the useless ammonia tank of recovery channel and rubbish leachate treatment system,
High level sensor, low liquid level sensor, the high level sensor, the signal transmission of low liquid level sensor are also set up on the deposed ammonia tank
To the control device.
The beneficial effects of the invention are as follows this deposed ammonia is reclaimed and deposed ammonia feedway using system by setting up deposed ammonia, when in deposed ammonia reuse
In the state of, under the control of SNCR denitration control system, replacing soft water to be mixed to form the ammoniacal liquor that concentration is 5% with ammoniacal liquor by deposed ammonia is used for rubbish
The non-catalytic reduction denitrating flue gas of incinerator, not only efficiently solves the deposed ammonia process problem in rubbish leachate disposal process, decreases simultaneously
The consumption of ammoniacal liquor, makes it turn waste into wealth in SNCR systems, significantly reduces power plant's operating cost.
Brief description of the drawings
Fig. 1 arranges schematic diagram for the equipment of existing denitrating system.
Fig. 2, Fig. 3 arrange schematic diagram for the equipment of one embodiment of the invention.
In figure,
The supply of 1 ammoniacal liquor is put, 1.1 ammonia water tanks, 1.2 ammoniacal liquor valves, 1.3 aqua ammonia pumps, 1.4 ammoniacal liquor pipelines, 1.5.1 ammonia water tank Liquid level lines, 1.5.2
Valve controlling line, 1.5.3 pump control lines；
The supply of 2 soft water is put, 2.1 water softening tanks, 2.2 soft water valves, 2.3 softened water pumps, 2.4 soft water pipelines, and 2.4A soft water and deposed ammonia are simultaneously taken over,
2.5.1 water softening tank Liquid level line, 2.5.2 soft water valve switch control lines, 2.5.3 softened water pump start-up and shut-down control lines；
The supply of 3 deposed ammonias is put, 3.1 deposed ammonia tanks, 3.2 deposed ammonia valves, 3.4 deposed ammonia pipelines, 3.5.1 deposed ammonia tank Liquid level lines, 3.5.2
Deposed ammonia valve switch control line, 3.5.4 deposed ammonia high level devices, 3.5.5 deposed ammonia low liquid level devices；
4 mixing tubes；
5.1 injection branch pipes；
6 burner hearths；
7 control devices；
8 rubbish leachate treatment system deposed ammonia tanks, 8.1 deposed ammonia recovery channels.
Embodiment
Fig. 1 arranges schematic diagram for the equipment of existing denitrating system (i.e. SNCR).Shown in figure, in the prior art, non-catalytic reduction denitrating flue gas (SNCR)
System mainly includes ammoniacal liquor feedway 1, soft water feedway 2, mixing tube 4 and front-end branches jet pipe 5.1, in addition to control device 7, ammoniacal liquor
Feedway 1 mainly includes ammonia water tank 1.1, ammoniacal liquor valve 1.2, the ammoniacal liquor pipeline 1.4 of aqua ammonia pump 1.3.Soft water feedway 2 mainly includes soft water
Tank 2.1, soft water valve 2.2, softened water pump 2.3, soft water pipeline 2.4, under SNCR control, ammoniacal liquor valve 1.2 and soft water valve 2.2 are opened,
Concentration is that 25% ammoniacal liquor is mixed through ammoniacal liquor pipeline 1.4 into mixing tube 4 with entering the soft water of mixing tube from soft water pipeline 2.4, ammoniacal liquor after both mix
Concentration dilution is to 5%, and the ammoniacal liquor after dilution is injected in the correct position of burner hearth 6 from injection branch pipe 5.1.Also shown in figure, ammonia water tank 1.1, ammoniacal liquor
Valve 1.2, aqua ammonia pump 1.3 constitute signal by control line 1.5.1,1.5.2,1.5.3 and control device 7 respectively and connected；Equally, water softening tank
2.1st, soft water valve 2.2, softened water pump 2.3 constitute signal by control line 2.5.1,2.5.2,2.5.3 and control device 7 respectively and connected.
During waste incineration and generating electricity, rubbish leachate can be produced during due to sanitary fill, accordingly, it would be desirable to handle rubbish leachate.
2%-3% deposed ammonia can be produced in the processing procedure of rubbish leachate, because the deposed ammonia concentration is relatively low, it is impossible to meet non-catalytic reduction flue gas and take off
Requirement of the nitre system to ammonia concn, and transport outward not high using then economic value.
Fig. 2, Fig. 3 arrange schematic diagram for the equipment of one embodiment proposed by the present invention.Fig. 2 is shown, in this example, non-catalytic reduction denitrating flue gas
(SNCR) system includes ammoniacal liquor feedway 1, soft water feedway 2, mixing tube 4 and is arranged on the front-end branches being connected in furnace with mixing tube 4
Jet pipe 5.1, in addition to control device 7, ammoniacal liquor feedway 1 is mainly including the ammonia water tank 1.1 set gradually, ammoniacal liquor valve 1.2, aqua ammonia pump 1.3
And ammoniacal liquor pipeline 1.4.Soft water feedway 2 mainly includes water softening tank 2.1, soft water valve 2.2, softened water pump 2.3 and the soft water set gradually
Pipeline 2.4.Under normal operating conditions, under SNCR control, ammoniacal liquor valve 1.2 and soft water valve 2.2 are opened, and concentration passes through for 25% ammoniacal liquor
Ammoniacal liquor pipeline 1.4 enters mixing tube with entering the ammoniacal liquor that mixing tube formation concentration is 5% from soft water pipeline 2.4.
Unlike the prior art, in this example, the deposed ammonia feedway 3 controlled by control device 7 is also set up, deposed ammonia feedway is main
Including the deposed ammonia tank 3.1, deposed ammonia valve 3.2 and deposed ammonia pipeline 3.4 set gradually.Fig. 2 is shown, useless after deposed ammonia valve 3.2
Ammoniacal liquor pipeline 3.4, which is linked into soft water pipeline 2.4, constitutes soft water and deposed ammonia and adapter 2.4A and access point is located at soft water valve 2.2 and softened water pump
Between 2.3, then soft water and deposed ammonia and adapter 2.4A be linked into again in the ammoniacal liquor pipeline 1.4 after aqua ammonia pump 1.3 and constitute mixing tube 4.When
In the state of deposed ammonia reuse, under SNCR control, soft water valve 2.2 is closed and deposed ammonia valve 3.2 is opened, and deposed ammonia is through deposed ammonia
Pipeline 3.4 mix instead of soft water with ammoniacal liquor in mixing tube 4 adjusted by the automatic calculating of control device to be formed concentration for 5% ammoniacal liquor then from spray
Penetrate the correct position that branch pipe 5.1 is injected in burner hearth 6.
Shown in figure, deposed ammonia tank 3.1, deposed ammonia valve 3.2 constitute signal by control line 3.5.1,3.5.2 and control device 7 respectively and connected.
Fig. 3 also shows that deposed ammonia tank 3.1 reclaims the deposed ammonia in rubbish leachate treatment system 8 by deposed ammonia recovery channel 8.1, meanwhile,
Deposed ammonia high level device 3.5.4 and deposed ammonia low liquid level device 3.5.5 are additionally provided with deposed ammonia tank 3.1.Deposed ammonia high level device 3.5.4 and useless ammonia
Water low liquid level device 3.5.5 constitutes signal by control line and control device 7 respectively and is connected.
Under normal operating conditions, the unlatching soft water of control device 7 valve 2.2, useless ammonia valve door 3.2, the SNCR system-computeds of closing go out under normal circumstances
The flow-rate ratio of ammoniacal liquor and soft water.Concentration enters mixing tube with entering the soft water of mixing tube from soft water pipeline 2.4 for 25% ammoniacal liquor through ammoniacal liquor pipeline 1.4
It is mixed to form the ammoniacal liquor that concentration is 5%.
When the useless ammonia high level device 3.5.4 liquid levels for detecting deposed ammonia reach high level, signal reaches SNCR, and system is by deposed ammonia reuse
Under state, now deposed ammonia valve 3.2 is opened, and soft water valve 2.2 is closed, and deposed ammonia is being mixed through deposed ammonia pipeline 3.4 instead of soft water with ammoniacal liquor
Mixing adjusts the ammoniacal liquor to form that concentration is 5% by the automatic calculating of control device in pipe, is then sprayed into waste incinerator suitable position and completes non-
Catalytic reduction reaction reaches removing NOx purpose.
Meanwhile, in the state of system is in deposed ammonia reuse, the deposed ammonia in deposed ammonia tank 3.1 will be gradually decreased, when deposed ammonia low liquid level device
3.5.5 when the deposed ammonia liquid level for detecting the inside of deposed ammonia tank 3.1 drops to low liquid level, deposed ammonia reuse process terminates, in the control of control device 7
Under system, system recovers normal operating condition.
At the same time, when the deposed ammonia low liquid level device 3.5.5 deposed ammonia liquid levels for detecting the inside of deposed ammonia tank 3.1 drop to low liquid level, in control
Deposed ammonia will be started under the control of device 7 to reclaim, deposed ammonia tank 3.1 starts to collect by deposed ammonia recovery channel 8.1 to be handled from rubbish leachate
The deposed ammonia of system deposed ammonia tank 8, after this process starts, the useless ammoniacal liquor position of the inside of deposed ammonia tank 3.1 will be further up, when deposed ammonia high level device
3.5.4 when the deposed ammonia liquid level for detecting the inside of deposed ammonia tank 3.1 rises to high level, collection of the deposed ammonia tank 3.1 by stopping to deposed ammonia；With
This simultaneously, when the deposed ammonia high level device 3.5.4 deposed ammonia liquid levels for detecting the inside of deposed ammonia tank 3.1 rise to high level, system start again into
Enter in the state of deposed ammonia reuse, so circulation is constantly run.
Claims (1)
1. a kind of waste incinerator non-catalytic reduction flue gas denitrification system for being used to reclaim useless ammonia, including ammoniacal liquor feedway, soft water feedway, mixing
The front-end branches jet pipe being connected in furnace with mixing tube is managed and is arranged on, in addition to for controlling the control of ammoniacal liquor feedway and soft water feedway to fill
Put, the ammoniacal liquor feedway mainly includes ammonia water tank, ammoniacal liquor valve, aqua ammonia pump and the ammoniacal liquor pipeline set gradually, the soft water feedway
Main water softening tank, soft water valve, softened water pump and the soft water pipeline for including setting gradually, it is characterized in that, also set up what is controlled by the control device
Deposed ammonia feedway, the deposed ammonia feedway mainly includes deposed ammonia tank, deposed ammonia valve and the deposed ammonia pipeline set gradually, described
Deposed ammonia pipeline after deposed ammonia valve be linked into soft water pipeline constitute soft water and deposed ammonia and adapter and access point be located at soft water valve with it is soft
Between water pump, then by soft water and deposed ammonia and it is linked into the ammoniacal liquor pipeline after aqua ammonia pump again and constitutes the mixing tube, returned when in useless ammonia
In the state of, under the control of the control device, it is 5% that deposed ammonia, which replaces soft water to be mixed to form concentration in mixing tube and ammoniacal liquor through useless ammonia pipeline,
Ammoniacal liquor, the correct position of burner hearth is then injected in from each branch's jet pipe,
The deposed ammonia tank is connected by the useless ammonia tank of recovery channel and rubbish leachate treatment system,
High level sensor, low liquid level sensor, the high level sensor, the signal transmission of low liquid level sensor are also set up on the deposed ammonia tank
To the control device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510472867.1A CN107029543A (en) | 2015-08-05 | 2015-08-05 | A kind of waste incinerator non-catalytic reduction flue gas denitrification system for being used to reclaim useless ammonia |
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| CN201510472867.1A CN107029543A (en) | 2015-08-05 | 2015-08-05 | A kind of waste incinerator non-catalytic reduction flue gas denitrification system for being used to reclaim useless ammonia |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112299444A (en) * | 2020-10-14 | 2021-02-02 | 营口正源电力配套设备有限公司 | Mobile liquid ammonia recovery ammonia tank replacement equipment and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101073741A (en) * | 2007-04-06 | 2007-11-21 | 东南大学 | Method and apparatus for combined removing sulfur-dioxide and nitrogenoxide by mixed solution |
| JP2007301524A (en) * | 2006-05-15 | 2007-11-22 | Takuma Co Ltd | Method and apparatus for denitrification |
| CN102626586A (en) * | 2012-04-01 | 2012-08-08 | 无锡雪浪环境科技股份有限公司 | Treatment device for emission reduction control over nitrogen oxide in flue gas |
| CN104801171A (en) * | 2015-05-08 | 2015-07-29 | 中国环境科学研究院 | SNCR (selective non-catalytic reduction) flue gas denitrification method and device utilizing organic/ammonia nitrogen waste liquid |
-
2015
- 2015-08-05 CN CN201510472867.1A patent/CN107029543A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007301524A (en) * | 2006-05-15 | 2007-11-22 | Takuma Co Ltd | Method and apparatus for denitrification |
| CN101073741A (en) * | 2007-04-06 | 2007-11-21 | 东南大学 | Method and apparatus for combined removing sulfur-dioxide and nitrogenoxide by mixed solution |
| CN102626586A (en) * | 2012-04-01 | 2012-08-08 | 无锡雪浪环境科技股份有限公司 | Treatment device for emission reduction control over nitrogen oxide in flue gas |
| CN104801171A (en) * | 2015-05-08 | 2015-07-29 | 中国环境科学研究院 | SNCR (selective non-catalytic reduction) flue gas denitrification method and device utilizing organic/ammonia nitrogen waste liquid |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112299444A (en) * | 2020-10-14 | 2021-02-02 | 营口正源电力配套设备有限公司 | Mobile liquid ammonia recovery ammonia tank replacement equipment and method |
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