CN205659563U - Utilize SCR flue gas denitration system of steam air stripping gasification aqueous ammonia - Google Patents
Utilize SCR flue gas denitration system of steam air stripping gasification aqueous ammonia Download PDFInfo
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- CN205659563U CN205659563U CN201620543746.1U CN201620543746U CN205659563U CN 205659563 U CN205659563 U CN 205659563U CN 201620543746 U CN201620543746 U CN 201620543746U CN 205659563 U CN205659563 U CN 205659563U
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Abstract
The utility model provides an utilize SCR flue gas denitration system of steam air stripping gasification aqueous ammonia, belongs to the environmental protection equipment field. The empty blender of ammonia, ammonia injection grid, ammonia cigarette blender, SCR reactor, draught fan and the chimney that include ammonia storing tank, heat exchanger, wastewater tank, strip tower and concatenate in proper order, dilutent fan is connected simultaneously to the input of ammonia cigarette blender, the ammonia import of ammonia storing tank, heat exchanger and strip tower concatenates in proper order, and the ammonia steam mix gas exit linkage ammonia of strip tower empties and mixes the ware, the high -temperature steam import of strip tower is used for connecting the high -temperature steam source, and the high -temperature wastewater export of strip tower, the heat medium import of heat exchanger, heat medium export and wastewater tank concatenate in proper order. After the aqueous ammonia in the strip tower passed through steam heating, the insolubilizing of ammonia was volatilized more easily, and partial water only need be evaporated in the pneumatolytic while of ammonia to this technology, so the steam consumption is less, the running cost is lower.
Description
Technical field
This utility model belongs to field of environment protection equipment, and a kind of SCR flue gas utilizing steam air stripping gasification ammonia takes off
Nitre system.
Background technology
At present, flue gas SCR (SCR) denitrating technique is the major technique of denitrating flue gas.SCR technique be
Under catalyst action, there is Chemoselective reduction with the NOx in flue gas in reducing agent, is allowed to generate N2 and water, and then row up to standard
Put.The reducing agent that flue gas denitrification system is conventional has liquefied ammonia, carbamide and ammonia.Liquefied ammonia is entered by liquefied ammonia discharging compressor and stores
Tank, vaporizer, become ammonia in steam heat effect gasified, and ammonia is again by sending into denitration in flue gas after Dilution air.Urine
Element is as reducing agent, and conventional pyrolysismethod becomes ammonia with hydrolysis legal system ammonia, sends into denitration in flue gas after Dilution air.Ammonia is made
For reducing agent, flashing to ammonia by heater, ammonia mixes with flue gas after Dilution air, enters SCR reactor and occurs
Reaction.Contrasting three kinds of methods, liquefied ammonia belongs to hazardous chemical, uses liquefied ammonia must store it, transport and make as reducing agent
With carrying out strict control.Carbamide needs to obtain through pyrolysis or hydrolysis as the system of raw material, urea system complicated and
Operating cost is higher than liquefied ammonia system.The ammonia generally using concentration to be 20%～29% for the reducing agent of denitration, relatively liquefied ammonia phase
To safety.
The technique carrying out using ammonia as reducing agent at present gasifying, first carries out ammonia atomization and enters vaporizer, pass through
High-temperature heating carries out gasification process to atomized ammonia, and blower fan provides the air quantity needed for dilution ammonia, and the volume fraction making ammonia is low
In 5%.Air stripping is to use a kind of gas medium to destroy Primordial Qi liquid biphase equilibrium and set up a kind of new vapor liquid equilibrium state, makes molten
A certain component in liquid desorbs owing to dividing potential drop reduces.Can be used for Ammonia-Containing Wastewater Treatment, containing in waste water can not only be reduced
Ammonia amount, and recovery ammonia can be increased economic efficiency as the reducing agent of denitrating flue gas.
Utility model content
The purpose of this utility model be a kind of utilize steam air stripping gasification ammonia SCR flue gas denitrification system, this system with
Ammonia-containing water, as raw material, uses steam as stripping medium, using ammonia gasification gained ammonia as reducing agent, carries out SCR cigarette
QI prostration nitre processes, and decreases ammonia discharge and has reclaimed again ammonia, has environmental protection, economic benefit.
The technical scheme realizing above-mentioned purpose is: a kind of SCR flue gas denitrification system utilizing steam air stripping gasification ammonia, its
Be characterised by: include tank used for storing ammonia, heat exchanger, wastewater trough, stripper and the ammonia sky blender being sequentially connected in series, ammonia-spraying grid,
Ammonia cigarette blender, SCR reactor, air-introduced machine and chimney, the input of ammonia cigarette blender is simultaneously connected with dilution air；Described vapour
The bottom of stripper is provided with hot waste water outlet, bottom is provided with high-temperature steam import, top is provided with ammonia import, top sets
Being equipped with ammonia gas vapor mixed gas outlet, the ammonia import of described tank used for storing ammonia, heat exchanger and stripper is sequentially connected in series, stripper
Ammonia gas vapor mixed gas outlet connect ammonia sky blender, the high-temperature steam import of described stripper is used for connecting high-temperature steam
Source, the hot waste water outlet of stripper, the outlet of the Heating medium of heat exchanger, heating agent and wastewater trough are sequentially connected in series.
Preferably, ammonia buffering it is serially connected with between ammonia gas vapor mixed gas outlet and the ammonia sky gaseous mixture of described stripper
Tank.
Operation principle of the present utility model: in tank used for storing ammonia, raw material ammonia water goes out with the hot waste water at the bottom of stripping tower through heat exchanger
The hot waste water that mouth is discharged carries out heat exchange, and after being heated to about 90 DEG C, feeding stripper overhead is met, due to ammonia with the steam of rising
Relative volatility more than water, more ammonia enters gas phase, and the liquid stayed with last layer column plate sets up new vapor liquid equilibrium.
Tower top obtains highly purified ammonia, vapour mixture.Low concentration ammonia-containing water flow to the bottom of stripping tower, and waste water is through conveying pumping
Wastewater trough is entered after raw material ammonia water heat exchange to heat exchanger.
The air that in ammonia surge tank, ammonia is sent here with dilution air enters ammonia air mixer and is diluted mixing, at cigarette
Arranging spray ammonia grid in road, dilution ammonia enters ammonia cigarette blender through ammonia-spraying grid, mixs homogeneously with flue gas in ammonia cigarette blender,
Enter SCR reactor, under the effect of catalyst, it is achieved the removing to NOX, then send into chimney by air-introduced machine.
The beneficial effects of the utility model:
(1) after the ammonia in stripper is heated by steam, the dissolubility of ammonia reduces, and is easier to volatilization, and this technique is at ammonia
Only needing the water of evaporation section while gasification, so steam consumption quantity is less, operating cost is relatively low；
(2) this utility model can select ammonia-containing water as raw material, reduces ammonia discharge and has reclaimed again ammonia, has ring
Guarantor, economic benefit；
(3) ammonia recovery of the present utility model can reach 98%, relatively low at the mass fraction producing ammonia-containing water at the bottom of tower, with
Waste Water Treatment can be delivered to after raw material ammonia water heat exchange.
Accompanying drawing explanation
Fig. 1 is workflow diagram of the present utility model.
Detailed description of the invention
As it is shown in figure 1, this utility model includes tank used for storing ammonia 1, heat exchanger 2, wastewater trough 3, stripper 4 and is sequentially connected in series
Ammonia surge tank 5, ammonia sky blender 6, ammonia-spraying grid 7, ammonia cigarette blender 8, SCR reactor 9, air-introduced machine 10 and chimney
11, the input of ammonia cigarette blender 8 is simultaneously connected with dilution air 12.
The bottom of stripper 4 is provided with hot waste water outlet 12, bottom is provided with high-temperature steam import 13, top is provided with
Ammonia import 14, top are provided with ammonia gas vapor mixed gas outlet 15, tank used for storing ammonia 1, heat exchanger 2 and the ammonia of stripper 4
Import 14 is sequentially connected in series, and the ammonia gas vapor mixed gas outlet 15 of stripper 4 connects ammonia surge tank 5, the high-temperature steam of stripper
Import 13 is used for connecting high-temperature steam source, the hot waste water of stripper 4 outlet 12, the Heating medium of heat exchanger 2, heating agent outlet with
And wastewater trough 3 is sequentially connected in series.
Claims (2)
1. the SCR flue gas denitrification system utilizing steam air stripping gasification ammonia, it is characterised in that: include tank used for storing ammonia, heat exchange
Device, wastewater trough, stripper and the ammonia sky blender being sequentially connected in series, ammonia-spraying grid, ammonia cigarette blender, SCR reactor, air-introduced machine
And chimney, the input of ammonia cigarette blender is simultaneously connected with dilution air；The bottom of described stripper is provided with hot waste water and goes out
Mouthful, bottom is provided with high-temperature steam import, top is provided with ammonia import, top is provided with ammonia gas vapor mixed gas outlet, institute
The ammonia import stating tank used for storing ammonia, heat exchanger and stripper is sequentially connected in series, and the ammonia gas vapor mixed gas outlet of stripper connects
Ammonia sky mixes device, and the high-temperature steam import of described stripper is used for connecting high-temperature steam source, the hot waste water outlet of stripper, heat exchange
The outlet of the Heating medium of device, heating agent and wastewater trough are sequentially connected in series.
A kind of SCR flue gas denitrification system utilizing steam air stripping gasification ammonia the most according to claim 1, its feature exists
In: it is serially connected with ammonia surge tank between ammonia gas vapor mixed gas outlet and the ammonia sky gaseous mixture of described stripper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620543746.1U CN205659563U (en) | 2016-06-07 | 2016-06-07 | Utilize SCR flue gas denitration system of steam air stripping gasification aqueous ammonia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620543746.1U CN205659563U (en) | 2016-06-07 | 2016-06-07 | Utilize SCR flue gas denitration system of steam air stripping gasification aqueous ammonia |
Publications (1)
| Publication Number | Publication Date |
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| CN205659563U true CN205659563U (en) | 2016-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620543746.1U Active CN205659563U (en) | 2016-06-07 | 2016-06-07 | Utilize SCR flue gas denitration system of steam air stripping gasification aqueous ammonia |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107289324A (en) * | 2017-06-26 | 2017-10-24 | 晋能长治热电有限公司 | A kind of power plant's low energy consumption eddy flow vaporizes the method and device of liquefied ammonia |
| CN107555721A (en) * | 2017-09-30 | 2018-01-09 | 浦湘生物能源股份有限公司 | A kind of high-concentration ammonia nitrogenous wastewater cooperates with the method and system administered with nitrogen oxides |
-
2016
- 2016-06-07 CN CN201620543746.1U patent/CN205659563U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107289324A (en) * | 2017-06-26 | 2017-10-24 | 晋能长治热电有限公司 | A kind of power plant's low energy consumption eddy flow vaporizes the method and device of liquefied ammonia |
| CN107555721A (en) * | 2017-09-30 | 2018-01-09 | 浦湘生物能源股份有限公司 | A kind of high-concentration ammonia nitrogenous wastewater cooperates with the method and system administered with nitrogen oxides |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |