CN204582981U - A kind of preparation system of urea liquid - Google Patents
A kind of preparation system of urea liquid Download PDFInfo
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- CN204582981U CN204582981U CN201520162914.8U CN201520162914U CN204582981U CN 204582981 U CN204582981 U CN 204582981U CN 201520162914 U CN201520162914 U CN 201520162914U CN 204582981 U CN204582981 U CN 204582981U
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Abstract
The utility model provides a kind of preparation system of urea liquid, comprises water body regulon, mix and blend unit and solution memory cell; Described water body regulon is connected with described mix and blend unit, and described mix and blend unit is connected to described solution memory cell, and described solution memory cell is connected to flue gas denitrification system; Also comprise middle control unit, described middle control unit and described mix and blend unit, described solution memory cell distinguish communication.The urea liquid that concentration is 20-40% can be obtained in storage tank, can be used alone for SNCR, SCR flue gas denitrification system in municipal solid waste incinerator or jointly.
Description
Technical field
The utility model relates to incineration flue gas of household garbage process field, is specifically related to a kind of preparation system of urea liquid.
Background technology
As one of domestic waste mode focusing on disposal, waste incineration effectively achieves innoxious, minimizing and the resource of rubbish, the main selection mode of the garbage disposal become in numerous trash processing way.
It seems from the angle of waste incineration, nitrogen oxide is one of major pollutants of waste incineration generation, and its discharge capacity becomes one of important indicator of municipal solid waste incinerator environmental assessment, is also one of important indicator of municipal solid waste incinerator 3A grade evaluation simultaneously.
The measure of current control NOx emission is mainly divided into Sources controlling and the large class of End-Management two, and wherein Sources controlling is the reaction of formation by NOx in various technological means control combustion process, and End-Management is then that the NOx generated is reduced to N by certain means
2, thus reduce the discharge capacity of NOx.Data show, Sources controlling is often difficult to reach discharge standard, therefore take suitable flue-gas denitrification technology to be the Main way controlling NOx emission from now on to reduce the denitride technology of the discharge capacity of NOx.
Current flue-gas denitrification technology (denitration) mainly contains selective catalytic reduction SCR and/or SNCR method SNCR technique, ammonia is as the reducing agent of denitrating system, usually have three kinds, liquefied ammonia, ammoniacal liquor and urea source, reliable and stable confession ammonia system is the essential condition ensureing whole denitrating system reliability service.The Combustion System how passing through incineration process of domestic garbage suppresses the generation of nitrogen oxide, and reducing the discharge capacity of nitrogen oxide, is problem demanding prompt solution.
Utility model content
In view of this, the utility model provides a kind of preparation system of urea liquid, aims to provide the preparation facilities of reducing agent (i.e. urea liquid) needed for a kind of garbage burning factory flue gas denitrification system.
The technical solution adopted in the utility model is specially:
A preparation system for urea liquid, comprises water body regulon, mix and blend unit and solution memory cell; Described water body regulon is connected with described mix and blend unit, and described mix and blend unit is connected to described solution memory cell, and described solution memory cell is connected to flue gas denitrification system;
Also comprise middle control unit, described middle control unit and described mix and blend unit, described solution memory cell distinguish communication.
In the preparation system of above-mentioned urea liquid, described water body regulon comprises static mixer, the first temperature transmitter and valve assembly, described valve assembly comprises the first control valve, the second control valve and the 3rd control valve, heat setting bears water and passes into described static mixer with demineralized water respectively by described first control valve and described second control valve, described static mixer is connected to described mix and blend unit through described first temperature transmitter, described 3rd control valve successively,, described first temperature transmitter and described second control valve chain.
In the preparation system of above-mentioned urea liquid, described mix and blend unit comprises preparation tank, agitator, the first liquid level gauge and the second temperature transmitter, described agitator stretches into the inner chamber of described preparation tank, the tank skin of described preparation tank is located at respectively by described first liquid level gauge and described second temperature transmitter, described first liquid level gauge and described second temperature transmitter respectively with described middle control unit communications; The feeding end of described preparation tank is provided with the first entrance and the second entrance, described water body regulon is connected to described first entrance, described second entrance is connected with batch hopper, and the discharge end of described preparation tank is connected to described solution memory cell by urea liquid delivery pump.
Described discharge end and described urea liquid delivery pump are provided with filter, and described filter is equipped with pressure difference switch, described pressure difference switch and described middle control unit communications.
In the preparation system of above-mentioned urea liquid, described preparation tank is also provided with the first steam exhaust-gas pipeline.
In the preparation system of above-mentioned urea liquid, between described second entrance and described batch hopper, be provided with rotary discharge valve.
In the preparation system of above-mentioned urea liquid, described first liquid level counts magnetic flap level gauge.
In the preparation system of above-mentioned urea liquid, described solution memory cell comprises storage tank, electric heat tracing device and the second liquid level gauge, described storage tank is located at respectively by described electric heat tracing device and described second liquid level gauge, described electric heat tracing device is equipped with temperature conditioning unit, described second liquid level gauge and described temperature conditioning unit respectively with described middle control unit communications, described mix and blend unit is connected to the feed end of described storage tank by urea liquid delivery pump, the discharge end of described storage tank is connected to flue gas denitrification system.
In the preparation system of above-mentioned urea liquid, described storage tank is also provided with the second steam exhaust-gas pipeline.
In the preparation system of above-mentioned urea liquid, described second liquid level counts pressure-type liquidometer.
The beneficial effect that the utility model produces is:
Urea liquid preparation system of the present utility model is the preparation that the flue gas denitrification system of municipal solid waste incinerator provides reducing agent, reducing agent that this technique obtains adopts urea as graininess agricultural fertilizer as the reducing agent of postorder denitration, be easy to get and relative inexpensiveness, potential safety hazard in transport and storage process is little, and technique floor space is few;
Adopt preparation system of the present utility model to obtain urea liquid that concentration is 20-40%, using it as reducing agent, more effectively can control the distribution situation of postorder injection of reducing agent emission mode and reducing agent, itself and flue gas is made to realize Homogeneous phase mixing better, thus ensure good denitration efficiency, reduce the escaping of ammonia rate.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, more completely the utility model can be understood better.Accompanying drawing described herein is used to provide further understanding of the present utility model, and embodiment and explanation thereof, for explaining the utility model, do not form improper restriction of the present utility model, wherein:
Fig. 1 is the structural representation of the preparation system of a kind of urea liquid of the utility model.
In figure:
1, static mixer 2, first temperature transmitter 3-1, first control valve 3-2, second control valve 3-3, 3rd control valve 4, urea batch hopper 5, rotary discharge valve 6, preparation tank 7, agitator 8, first (magnetic turnover panel) liquid level gauge 9, first temperature transmitter 10, filter 11, pressure difference switch 12, urea liquid delivery pump 13, storage tank 14, electric heat tracing device 15, second (static pressure type) liquid level gauge 16-1, first steam exhaust-gas pipeline 16-2, second steam exhaust-gas pipeline.
Detailed description of the invention
Below in conjunction with drawings and Examples, the technical solution of the utility model is described in further detail.
The preparation system of a kind of urea liquid as shown in Figure 1, comprises water body regulon, mix and blend unit and solution memory cell; Water body regulon is connected with mix and blend unit, and mix and blend unit is connected to solution memory cell, and solution memory cell is connected to flue gas denitrification system; Also comprise middle control unit, middle control unit and mix and blend unit, solution memory cell distinguish communication; Wherein:
Water body regulon comprises static mixer, the first temperature transmitter 2 and valve assembly, valve assembly comprises the first control valve 3-1, the second control valve 3-2 and the 3rd control valve 3-3, heat setting bears water and passes into static mixer 1 with demineralized water respectively by the first control valve 3-1 and the second control valve 3-2, static mixer 1 is connected to mix and blend unit through the first temperature transmitter 2, the 3rd control valve 3-3 successively, and the first temperature transmitter 2 and the second control valve 3-2 chain;
Mix and blend unit comprises preparation tank 6, agitator 7, first liquid level gauge 8 (being preferably magnetic flap level gauge) and the second temperature transmitter 9, agitator 7 stretches into the inner chamber of preparation tank 6, the tank skin of preparation tank 6 is located at respectively by first liquid level gauge 8 and the second temperature transmitter 9, the first liquid level gauge 8 and the second temperature transmitter 9 respectively with middle control unit communications; The feeding end of preparation tank 6 is provided with the first entrance and the second entrance, and water body regulon is connected to the first entrance, and the second entrance is connected with batch hopper 4, is provided with rotary discharge valve 5 between the second entrance and batch hopper 4; The discharge end of preparation tank 6 is connected to solution memory cell by urea liquid delivery pump 12; Discharge end and urea liquid delivery pump 12 are provided with filter 10, and filter 10 is equipped with pressure difference switch 11, pressure difference switch 11 and middle control unit communications; Preparation tank 6 is also provided with the first steam exhaust-gas pipeline 16-1;
Solution memory cell comprises storage tank 13, electric heat tracing device 14 and the second liquid level gauge 15, storage tank 13 is located at respectively by electric heat tracing device 14 and the second liquid level gauge 15 (being preferably pressure-type liquidometer), electric heat tracing device 14 is equipped with temperature conditioning unit, second liquid level gauge 15 and temperature conditioning unit respectively with middle control unit communications, mix and blend unit is connected to the feed end of storage tank 13 by urea liquid delivery pump 12, and the discharge end of storage tank 13 is connected to flue gas denitrification system; Storage tank 13 is also provided with the second steam exhaust-gas pipeline 16-2.
Concrete technology prepared by urea liquid is to adopt above-mentioned preparation system to carry out:
After heat setting bears water and is mixed to about 50 DEG C with cold demineralized water in static mixer 1, enter in the preparation tank 6 of urea liquid, the temperature that wherein heat setting bears water is 90-120 DEG C, the temperature of demineralized water is 5-27 DEG C, ratio both being regulated by the first temperature transmitter 2, that is: temperature transmitter 2 and the second control valve 3-2 chain, controlled the aperture of the second control valve 3-2 by the temperature measuring mixing water in real time, make its mixed liquor reach target temperature; Control valve (3-1,3-3) is switch valve, and its effect is respectively used to control thermal coagulation water and flow to mixed flow in static mixer 1 and in static mixer 1 to the on-off action in preparation tank 6.
The preparation tank 6 of urea liquid configures magnetic flap level gauge 8, if liquid level warning control points such as LL, L, H, HH, when the mixing water entered starts agitator 7 to during L liquid level, when the mixing water entered stops water inlet to during H liquid level, then start rotary discharge valve 5, make the urea granules be placed in batch hopper 4 be discharged into preparation tank 6 equably.Preparation tank 6 is configured with the second temperature transmitter 9, in order to measure the temperature of urea liquid in preparation tank 6, and this temperature signal is reached middle control unit, when measured temperature too high or too low (temperature upper limit and lower limit are setting value), sends alarm signal.Urea granules and mixed liquor stir about 10-15min in preparation tank 6, until after dissolving completely, can join concentration is the urea liquid of 20-40%;
Storage tank 13 is configured with pressure-type liquidometer 15, LL, L, H, HH liquid level warning control point is set, when storage tank 13 liquid level starts urea liquid delivery pump 12 to time low liquid level (L), urea liquid in preparation tank 6 is delivered to storage tank 13, stops urea liquid delivery pump 12 as storage tank 13 liquid level paramount liquid level (H).
Preferred as one, urea liquid delivery pump 12 is configuration 2 cover usually, the using and the reserved, y-type filter 10 is set before pump, and y-type filter 10 is furnished with pressure difference switch 11, when pressure difference signal reaches setting value, pressure difference signal reaches middle control unit, reminds cleaned filter 10.
Urea liquid is in course of conveying, and when the liquid level in preparation tank 6 is to low liquid level (L), stop the stirring of agitator 7, during to low (LL) liquid level, urea liquid delivery pump 12 quits work.
Storage tank 13 configures electric tracer heating system 14, and electric heat tracing device 14 is configured with temperature conditioning unit, is to ensure that the urea liquid temperature in storage tank 13 remains on about 50 DEG C.
Steam in tank is drained into outdoor by steam exhaust-gas pipeline (16-1,16-2) by urea liquid preparation tank 6 and storage tank 13, and in order to ensure the temperature in solution preparation process, pipeline and the tank body of the storage element of whole urea liquid are equipped with heat-insulation layer.
As mentioned above; embodiment of the present utility model is explained; obviously, as long as do not depart from fact inventive point of the present utility model and effect, will be readily apparent to persons skilled in the art distortion, is also all included within protection domain of the present utility model.
Claims (10)
1. a preparation system for urea liquid, is characterized in that, comprises water body regulon, mix and blend unit and solution memory cell; Described water body regulon is connected with described mix and blend unit, and described mix and blend unit is connected to described solution memory cell, and described solution memory cell is connected to flue gas denitrification system;
Also comprise middle control unit, described middle control unit and described mix and blend unit, described solution memory cell distinguish communication.
2. the preparation system of urea liquid according to claim 1, it is characterized in that, described water body regulon comprises static mixer, first temperature transmitter and valve assembly, described valve assembly comprises the first control valve, second control valve and the 3rd control valve, heat setting bears water and passes into described static mixer with demineralized water respectively by described first control valve and described second control valve, described static mixer is successively through described first temperature transmitter, described 3rd control valve is connected to described mix and blend unit, described first temperature transmitter and described second control valve chain.
3. the preparation system of urea liquid according to claim 1, it is characterized in that, described mix and blend unit comprises preparation tank, agitator, the first liquid level gauge and the second temperature transmitter, described agitator stretches into the inner chamber of described preparation tank, the tank skin of described preparation tank is located at respectively by described first liquid level gauge and described second temperature transmitter, described first liquid level gauge and described second temperature transmitter respectively with described middle control unit communications; The feeding end of described preparation tank is provided with the first entrance and the second entrance, described water body regulon is connected to described first entrance, described second entrance is connected with batch hopper, and the discharge end of described preparation tank is connected to described solution memory cell by urea liquid delivery pump.
4. the preparation system of urea liquid according to claim 3, is characterized in that, described discharge end and described urea liquid delivery pump are provided with filter, and described filter is equipped with pressure difference switch, described pressure difference switch and described middle control unit communications.
5. the preparation system of urea liquid according to claim 3, is characterized in that, described preparation tank is also provided with the first steam exhaust-gas pipeline.
6. the preparation system of urea liquid according to claim 3, is characterized in that, is provided with rotary discharge valve between described second entrance and described batch hopper.
7. the preparation system of urea liquid according to claim 3, is characterized in that, described first liquid level counts magnetic flap level gauge.
8. the preparation system of urea liquid according to claim 1, it is characterized in that, described solution memory cell comprises storage tank, electric heat tracing device and the second liquid level gauge, described storage tank is located at respectively by described electric heat tracing device and described second liquid level gauge, described electric heat tracing device is equipped with temperature conditioning unit, described second liquid level gauge and described temperature conditioning unit respectively with described middle control unit communications, described mix and blend unit is connected to the feed end of described storage tank by urea liquid delivery pump, the discharge end of described storage tank is connected to flue gas denitrification system.
9. the preparation system of urea liquid according to claim 8, is characterized in that, described storage tank is also provided with the second steam exhaust-gas pipeline.
10. the preparation system of urea liquid according to claim 8, is characterized in that, described second liquid level counts pressure-type liquidometer.
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| CN201520162914.8U CN204582981U (en) | 2015-03-20 | 2015-03-20 | A kind of preparation system of urea liquid |
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| CN201520162914.8U CN204582981U (en) | 2015-03-20 | 2015-03-20 | A kind of preparation system of urea liquid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106000142A (en) * | 2016-07-29 | 2016-10-12 | 国投钦州发电有限公司 | Device for automatically preparing and storing ammonia water and use method of device |
| CN106178904A (en) * | 2016-09-09 | 2016-12-07 | 成都九十度工业产品设计有限公司 | A kind of emission-control equipment and waste gas processing method |
| CN110152466A (en) * | 2019-06-26 | 2019-08-23 | 中国恩菲工程技术有限公司 | Denitration control system and denitration control method |
| CN110314563A (en) * | 2019-07-17 | 2019-10-11 | 上海市东方海事工程技术有限公司 | It is a kind of perseverance strength solution prepare and transportation system |
-
2015
- 2015-03-20 CN CN201520162914.8U patent/CN204582981U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106000142A (en) * | 2016-07-29 | 2016-10-12 | 国投钦州发电有限公司 | Device for automatically preparing and storing ammonia water and use method of device |
| CN106178904A (en) * | 2016-09-09 | 2016-12-07 | 成都九十度工业产品设计有限公司 | A kind of emission-control equipment and waste gas processing method |
| CN110152466A (en) * | 2019-06-26 | 2019-08-23 | 中国恩菲工程技术有限公司 | Denitration control system and denitration control method |
| CN110314563A (en) * | 2019-07-17 | 2019-10-11 | 上海市东方海事工程技术有限公司 | It is a kind of perseverance strength solution prepare and transportation system |
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