CN209646298U - The preparation system of denitration urea liquid - Google Patents
The preparation system of denitration urea liquid Download PDFInfo
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- CN209646298U CN209646298U CN201920223079.2U CN201920223079U CN209646298U CN 209646298 U CN209646298 U CN 209646298U CN 201920223079 U CN201920223079 U CN 201920223079U CN 209646298 U CN209646298 U CN 209646298U
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Abstract
The utility model relates to a kind of preparation systems of denitration urea liquid, including urea liquid preparation tank, its inner cavity is equipped with blender, the upper port of urea liquid preparation tank is equipped with capping, capping top is equipped with the vacuum tank that feeds intake, the feed intake lower part of vacuum tank is connected with pneumatic baiting valve, the lower end outlet of pneumatic baiting valve is connected with urea feeding port, the vacuum tank top side that feeds intake is connected equipped with vacuum orifice with vacuum pump, the vacuum tank top other side that feeds intake is connected with the lower part outlet of weigh-hatching plant equipped with feed inlet by urea suction tube, the outlet of preparation tank outlet valve is connected by filter with the entrance of preparation tank delivery pump, the outlet of preparation tank delivery pump is connected by preparing solution conveying pneumatic operated valve with preparation tank outlet tube；The outlet of preparation tank delivery pump is also connected by circulation stirring pneumatic operated valve with the lower inlet of densimeter, and the upper end outlet of densimeter is connected by Concentration Testing circulation pipe with preparation tank circulation port.The system labor intensity is low and the compound concentration of urea liquid is accurate.
Description
Technical field
The utility model relates to a kind of denitrating system of waste incinerator, in particular to a kind of system of denitration urea liquid
Standby system, belongs to gas denitrifying technology field.
Background technique
With the quickening of urbanization process, more and more huger, the traditional landfill of the house refuse quantity that city generates daily
Etc. processing modes can not continue, how scientifically and rationally integrated treatment utilize rubbish, become more and more important project, it is harmless
Change, minimizing and recycling become common recognition.Wherein, high temperature incineration is carried out to the higher rubbish of fuel value, is produced with burning away the refuse
Raw heat generates steam, and steam enters steam turbine and generates electricity, has been more and more widely used in practice.
Increasingly stringent with environmental requirement, most places discharge standard arranges the nitrogen oxides of domestic waste incineration
It puts concentration and is limited to 100mg/m3 hereinafter, the mainstream technology of control nitrogen oxygen emissions of oxides is selective catalytic reduction at present
(SCR) technology, SCR denitration technology refer under the action of catalyst using reducing agent (such as ammonia, urea and ammonium hydroxide) directly handle
Conversion of nitrogen oxides in flue gas is free of contamination water and nitrogen, needs to build fairly large denitrating tower, capital investment and is accounted for
Bigger according to space, the superiority and inferiority of denitrating catalyst performance directly influences the denitration effect of SCR method, needs periodically to be regenerated
Or replacement.
Selective non-catalytic reduction (selective non-catalytic reduction) refers to the effect of no catalyst
Under, sprayed into " temperature window " for being suitble to denitration reaction reducing agent by the nitrogen oxides in flue gas be reduced to harmless nitrogen and
Water.For city garbage incinerator, the NOx that urea is sprayed into furnace as reducing agent, in reducing agent and flue gas is mostly used
Reaction, does not react generally with oxygen, because not using catalyst, therefore referred to as selective non-catalytic reduction method (abbreviation SNCR).By
Catalyst is not had in the technique, it is therefore necessary to reducing agent be added in high-temperature region.It is 850~1100 DEG C that reducing agent, which sprays into fire box temperature,
Region, rapid thermal decomposition reacted with the NOx in flue gas and generates nitrogen and water at ammonia.
SNCR system is traditionally carried out by operative employee, specific practice is will be packed firstly the need of urea liquid is prepared
Urea pours into urea liquid preparation tank, and a certain amount of tap water is added, and stirring melts urea and becomes uniform urea
Solution.Defect are as follows: the great work intensity of 1. operative employees be easy to cause inventory or amount of water not rigorous, keeps the solution prepared dense
Degree fluctuates；2. worker is easy directly to topple over urea to open urea liquid preparation tank, and is easy to fall into dust, time one
It is long to be easy to block conveyance conduit in bottom settlings.3. using tap water dissolved urea particle, the relatively long time is needed, and
After heating, temporary hardness is precipitated, and pipeline can be blocked when serious in inner wall of the pipe fouling.
Utility model content
The purpose of this utility model is that overcoming problems of the prior art, a kind of denitration urea liquid is provided
Preparation system, labor intensity is low, easy to operate, easily controllable, and the compound concentration of urea liquid is accurate.
In order to solve the above technical problems, the preparation system of a kind of denitration urea liquid of the utility model, including urea
Solution preparation tank, inner cavity, which is equipped with, prepares jar agitator along what axis extended, and the lower part of the urea liquid preparation tank is equipped with system
Standby tank exports, and the upper port of the urea liquid preparation tank, which is equipped with, covers its closed preparation tank, in the preparation tank capping
Equipped with urea feeding port, preparation tank water filling port and preparation tank circulation port, the top of the preparation tank capping is equipped with the vacuum tank that feeds intake,
The lower part of the vacuum tank that feeds intake is equipped with cone bucket and is connected with pneumatic baiting valve, the lower end outlet of the pneumatic baiting valve with it is described
Urea feeding port is connected, and the vacuum tank top side that feeds intake is connected equipped with vacuum orifice with the pump orifice of vacuum pump, the throwing
The material vacuum tank top other side is equipped with feed inlet and is connected by urea suction tube with the lower part outlet of weigh-hatching plant, the preparation tank
Outlet is equipped with preparation tank outlet valve, and the outlet of the preparation tank outlet valve passes through the entrance phase of filter and preparation tank delivery pump
Even, the outlet of the preparation tank delivery pump is connected by preparing solution conveying pneumatic operated valve with preparation tank outlet tube；The preparation tank
The outlet of delivery pump is also connected with the entrance of circulation stirring pneumatic operated valve, under the outlet and densimeter of the circulation stirring pneumatic operated valve
End entrance is connected, and the upper end outlet of the densimeter is connected by Concentration Testing circulation pipe with the preparation tank circulation port.
Compared with the existing technology, the utility model achieves following the utility model has the advantages that preparation tank capping prepares urea liquid
The upper port of tank is closed, and is prevented dust and is fallen into urea liquid preparation tank, and avoids the randomness for toppling over urea into tank；Urea
When feeding, operative employee pours into packed urea in weigh-hatching plant, and weigh-hatching plant is measured and accumulated to the weight to feed intake every time,
Accurate rear starting vacuum pump is weighed, forms negative pressure in the vacuum tank that feeds intake, the urea granules in weigh-hatching plant are through urea suction tube
It is inhaled into and feeds intake in vacuum tank, pneumatic baiting valve opens then urea granules and passes through urea feeding port inflow urea liquid preparation tank
It is interior, then by the water of preparation tank water filling port injection corresponding discharge, starting, which prepares jar agitator, dissolves urea granules；Then it opens
Preparation tank outlet valve and circulation stirring pneumatic operated valve start preparation tank delivery pump, after urea liquid is filtered, are produced tank
Conveying pumps out, and through circulation stirring pneumatic operated valve, densimeter, Concentration Testing circulation pipe and preparation tank circulation port, returns to urea liquid
In preparation tank, cyclic process had not only made the solution in preparation tank more uniform, but also the concentration of solution can be monitored by densimeter,
After confirmation solution concentration keeps constant and meets the requirements, circulation stirring pneumatic operated valve is closed, and is prepared solution conveying pneumatic operated valve and is opened, urine
Plain solution is prepared solution conveying pneumatic operated valve and preparation tank outlet tube enters in urea liquid storage tank and stores.The system is adjusted every time
When with solution, the weight and water injection rate of urea granules all obtain stringent metering, and the electronic scale of weigh-hatching plant will record every time
The information such as time, the weight of weighing are simultaneously accumulated automatically, convenient for checking monitoring and statistics, prevent randomness when allotment；Match
The solution made is recycled through densimeter, illustrates that urea granules have been completely dissolved and have stirred evenly if concentration is kept constant,
It can directly judge whether the concentration of solution meets the requirements by densimeter.
As the improvement of the utility model, the inner cavity of the urea liquid preparation tank is equipped with preparation tank heating coil, described
The upper end entrance of preparation tank heating coil heats steam valve by preparation tank and is connected with plant area steam pipe, the preparation tank heating dish
The lower end outlet of pipe is connected by steam trap with drain trap；The lower part of the urea liquid preparation tank is equipped with thermometer and temperature
The opening and closing of sensor, the preparation tank heating steam valve is controlled by the temperature that temperature sensor is detected.Preparation tank heats steam
Valve is opened, and preparation tank heating coil heats urea liquid, and temperature sensor detects urea liquid and reaches set temperature
Afterwards, control system closes preparation tank and heats steam valve, and preparation tank heating steam valve is then again turned on lower than set temperature and continues to add
Heat.
The preparation system further includes Na-ion exchanger as a further improvement of the utility model, and the sodium ion is handed over
The entrance of parallel operation is connected with plant area's running water pipe, and the outlet of the Na-ion exchanger is filled the water by soft water outlet valve and preparation tank
The entrance of pipe is connected, and the preparation tank water injection pipe fills the water pneumatic operated valve by preparation tank and is connected with the preparation tank water filling port；It is described
The entrance of preparation tank water injection pipe also passes through desalination water valve and is connected with plant area desalination water pipe.Tap water removes after Na-ion exchanger
Hardness becomes softened water, and softened water enters preparation tank water injection pipe through soft water outlet valve, after preparation tank fills the water pneumatic operated valve opening
Softened water is injected into urea liquid preparation tank by preparation tank water filling port, it can be to avoid molten using softened water allotment urea liquid
The pipeline scale of liquid stream warp, to guarantee operation steady in a long-term.Na-ion exchanger is configured with salt box, using sodium chloride solution to sodium
Ion exchange resin is regenerated.The softened water produced during the non-water filling of urea liquid preparation tank, can through soft water outlet valve into
Enter in water softening tank and stores.Soft water outlet valve can also be closed, desalination water valve is opened, urea is deployed using the existing demineralized water of plant area
Solution reduces the treating capacity of Na-ion exchanger, is comprehensively utilized plant area's demineralized water.
Magnetic turning plate liquid level is installed on the tank skin of the urea liquid preparation tank as a further improvement of the utility model,
The opening and closing of meter, the preparation tank water filling pneumatic operated valve is controlled by the liquid level that magnetic double level gauge is detected.Pass through magnetic double level gauge
The liquid level that urea liquid preparation tank can strictly be monitored, obtains the water injection rate of urea liquid preparation tank indirectly, so as to urea
Inventory strictly matches, and after magnetic double level gauge detects urea liquid preparation tank arrival setting liquid level, then preparation tank fills the water gas
Dynamic valve is closed.
The top of the weigh-hatching plant is equipped with the electronic calabash of lifting urea bag as a further improvement of the utility model,
Reed.Urea bag is lifted by crane using electric block, the physical strength of operative employee can be saved, reduces labor intensity.
The upper end for preparing jar agitator is from preparation tank capping as a further improvement of the utility model,
The heart is stretched out and is driven by stirring motor.
Detailed description of the invention
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments, and attached drawing only provides ginseng
It examines and illustrates to use, it is non-to limit the utility model.
Fig. 1 is the flow chart of the preparation system of the utility model denitration urea liquid.
In figure: 1. electric blocks；2. weigh-hatching plant；3. feed intake vacuum tank；4. urea liquid preparation tank；4a. urea feeds intake
Mouthful；4b. preparation tank water filling port；4c. preparation tank circulation port；4d. prepares jar agitator；4e. preparation tank heating coil；4f. temperature
Table；4g. temperature sensor；4h. magnetic double level gauge；5. Na-ion exchanger；5a. salt box；6. urea liquid storage tank；7. dredging
Water pot；8. water softening tank；V1. pneumatic baiting valve；V2. soft water outlet valve；V3. desalination water valve；V4. preparation tank heats steam valve；V5.
Preparation tank fills the water pneumatic operated valve；V6. preparation tank outlet valve；V7. circulation stirring pneumatic operated valve；V8. solution conveying pneumatic operated valve is prepared；G1.
Plant area's running water pipe；G2. plant area's steam pipe；G3. plant area's desalination water pipe；G4. plant area's compressed air hose；G5. urea suction tube；
G6. preparation tank water injection pipe；G7. Concentration Testing circulation pipe；G8. preparation tank outlet tube；L1. filter；N1. densimeter；B1. vacuum
Pump；B2. preparation tank delivery pump.
Specific embodiment
As shown in Figure 1, the preparation system of the utility model denitration urea liquid includes urea liquid preparation tank 4, in
Chamber, which is equipped with, prepares jar agitator 4d along what axis extended, and the lower part of urea liquid preparation tank 4 is exported equipped with preparation tank, urea liquid
The upper port of preparation tank 4, which is equipped with, covers its closed preparation tank, prepares the upper end of jar agitator 4d from preparation tank capping
The heart is stretched out and is driven by stirring motor.Preparation tank capping is equipped with urea feeding port 4a, preparation tank water filling port 4b and preparation tank and follows
Collar extension 4c, the top of preparation tank capping are equipped with the vacuum tank 3 that feeds intake, and the lower part for the vacuum tank 3 that feeds intake is equipped with cone bucket and is connected with pneumatic
The lower end outlet of baiting valve V1, pneumatic baiting valve V1 are connected with urea feeding port 4a, and the 3 top side of vacuum tank that feeds intake, which is equipped with, takes out very
Eat dishes without rice or wine to be connected with the pump orifice of vacuum pump B1, feed intake the 3 top other side of vacuum tank equipped with feed inlet by urea suction tube G5 with
The lower part outlet of weigh-hatching plant 2 is connected, and preparation tank outlet is equipped with preparation tank outlet valve V6, and the outlet of preparation tank outlet valve V6 is logical
It crosses filter L1 to be connected with the entrance of preparation tank delivery pump B2, the outlet of preparation tank delivery pump B2 is pneumatic by preparing solution conveying
Valve V8 is connected with preparation tank outlet tube G8；The outlet of preparation tank delivery pump B2 is also connected with the entrance of circulation stirring pneumatic operated valve V7,
The outlet of circulation stirring pneumatic operated valve V7 is connected with the lower inlet of densimeter N1, and the upper end outlet of densimeter N1 passes through Concentration Testing
Circulation pipe G7 is connected with preparation tank circulation port 4c.Each pneumatic operated valve provides compressed air by plant area compressed air hose G4.
Preparation tank, which covers, closes the upper port of urea liquid preparation tank 4, prevents dust and falls into urea liquid preparation tank 4
It is interior, and avoid the randomness that urea is toppled over into tank；When urea feeding, operative employee pours into packed urea in weigh-hatching plant 2, meter
Measuring bin 2 is measured and is accumulated to the weight to feed intake every time, accurate rear starting vacuum pump B1 is weighed, in the vacuum tank 3 that feeds intake
Negative pressure is formed, the urea granules in weigh-hatching plant 2 are inhaled into through urea suction tube G5 to feed intake in vacuum tank 3, pneumatic baiting valve V1
It opens then urea granules to flow into urea liquid preparation tank 4 by urea feeding port 4a, then is injected by preparation tank water filling port 4b
The water of corresponding discharge, starting, which prepares jar agitator 4d, dissolves urea granules；Then it opens preparation tank outlet valve V6 and circulation is stirred
Pneumatic operated valve V7 to be mixed, preparation tank delivery pump B2 is started, urea liquid is produced tank delivery pump B2 submitting after filter L1 filtering,
Through circulation stirring pneumatic operated valve V7, densimeter N1, Concentration Testing circulation pipe G7 and preparation tank circulation port 4c, urea liquid preparation is returned to
In tank 4, cyclic process had not only made the solution in preparation tank more uniform, but also the concentration of solution can be monitored by densimeter N1,
After confirmation solution concentration keeps constant and meets the requirements, circulation stirring pneumatic operated valve V7 is closed, and is prepared solution conveying pneumatic operated valve V8 and is beaten
It opens, urea liquid is prepared solution conveying pneumatic operated valve V8 and preparation tank outlet tube G8 and enters in urea liquid storage tank 6 and store.It should
When system deploys solution every time, the weight and water injection rate of urea granules all obtain stringent metering, and the electronic scale of weigh-hatching plant 2
It will record the information such as the time weighed every time, weight and accumulated automatically, be convenient for checking monitoring and statistics, when preventing to deploy
It is random；Prepared solution is recycled through densimeter N1, illustrate if concentration is kept constant urea granules be completely dissolved and
It has been stirred evenly that, can directly judge whether the concentration of solution meets the requirements by densimeter N1.
The inner cavity of urea liquid preparation tank 4 is equipped with preparation tank heating coil 4e, the upper end entrance of preparation tank heating coil 4e
It heats steam valve V4 by preparation tank to be connected with plant area steam pipe G2, the lower end outlet of preparation tank heating coil 4e passes through steam trap
It is connected with drain trap 7；The lower part of urea liquid preparation tank 4 is equipped with thermometer 4f and temperature sensor 4g, and preparation tank heating is steamed
The opening and closing of steam valve V4 is controlled by the temperature that temperature sensor 4g is detected.Preparation tank heats steam valve V4 and opens, preparation tank heating
Coil pipe 4e heats urea liquid, and temperature sensor 4g is detected after urea liquid reaches set temperature, and control system is closed
Preparation tank heating steam valve V4 is closed, preparation tank heating steam valve V4 is then again turned on lower than set temperature and continues to heat.
The preparation system further includes Na-ion exchanger 5, entrance and the plant area's running water pipe G1 phase of Na-ion exchanger 5
Even, the outlet of Na-ion exchanger 5 is connected by soft water outlet valve V2 with the entrance of preparation tank water injection pipe G6, preparation tank water injection pipe
G6 fills the water pneumatic operated valve V5 by preparation tank and is connected with preparation tank water filling port 4b；The entrance of preparation tank water injection pipe G6 also passes through demineralized water
Valve V3 is connected with plant area desalination water pipe G3.Tap water removes hardness as softened water after Na-ion exchanger 5, and softened water is through soft
Water outlet valve V2, which enters preparation tank water injection pipe G6, can pass through preparation tank water filling port 4b after preparation tank fills the water pneumatic operated valve V5 opening
Softened water is injected into urea liquid preparation tank 4, it can be to avoid the pipeline knot that solution flows through using softened water allotment urea liquid
Dirt, to guarantee operation steady in a long-term.Na-ion exchanger 5 is configured with salt box 5a, using sodium chloride solution to sodium ion exchange tree
Rouge is regenerated.The softened water produced during the non-water filling of urea liquid preparation tank 4 can enter water softening tank through soft water outlet valve V2
It is stored in 8.Soft water outlet valve V2 can also be closed, desalination water valve V3 is opened, it is molten using the existing demineralized water allotment urea of plant area
Liquid reduces the treating capacity of Na-ion exchanger 5, is comprehensively utilized plant area's demineralized water.
Magnetic double level gauge 4h is installed, preparation tank fills the water the opening and closing of pneumatic operated valve V5 on the tank skin of urea liquid preparation tank 4
It is controlled by the liquid level that magnetic double level gauge 4h is detected.Urea liquid preparation tank can be strictly monitored by magnetic double level gauge 4h
4 liquid level obtains the water injection rate of urea liquid preparation tank 4 indirectly, strictly to be matched with the inventory of urea, magnetic turning plate liquid level
After meter 4h detects the arrival setting liquid level of urea liquid preparation tank 4, then preparation tank water filling pneumatic operated valve V5 is closed.
The top of weigh-hatching plant 2 is equipped with the electric block 1 of lifting urea bag, lifts by crane urea bag using electric block 1, can be with
The physical strength of operative employee is saved, labor intensity is reduced.
The foregoing is merely the preferable possible embodiments of the utility model, patent that is non-therefore limiting to the utility model
Protection scope.In addition to the implementation, the utility model can also have other embodiments.It is all to use equivalent replacement or equivalent change
The technical solution to be formed is changed, is all fallen in the protection scope of the requires of the utility model.Technology of the utility model without description is special
Sign can realize that details are not described herein by or using the prior art.
Claims (6)
1. a kind of preparation system of denitration urea liquid, including urea liquid preparation tank, inner cavity is equipped with to be extended along axis
Jar agitator is prepared, the lower part of the urea liquid preparation tank is exported equipped with preparation tank, it is characterised in that: the urea liquid system
The upper port of standby tank, which is equipped with, covers its closed preparation tank, and the preparation tank capping is equipped with urea feeding port, preparation tank is infused
The top of the mouth of a river and preparation tank circulation port, the preparation tank capping is equipped with the vacuum tank that feeds intake, and the lower part of the vacuum tank that feeds intake is set
There is cone bucket and be connected with pneumatic baiting valve, the lower end outlet of the pneumatic baiting valve is connected with the urea feeding port, the throwing
Material vacuum tank top side is equipped with vacuum orifice and is connected with the pump orifice of vacuum pump, and the vacuum tank top other side that feeds intake is equipped with
Feed inlet is connected by urea suction tube with the lower part outlet of weigh-hatching plant, and the preparation tank outlet is equipped with preparation tank outlet
The outlet of valve, the preparation tank outlet valve is connected by filter with the entrance of preparation tank delivery pump, the preparation tank delivery pump
Outlet convey pneumatic operated valve by preparing solution and be connected with preparation tank outlet tube；The outlet of the preparation tank delivery pump also with circulation
The entrance for stirring pneumatic operated valve is connected, and the outlet of the circulation stirring pneumatic operated valve is connected with the lower inlet of densimeter, the concentration
The upper end outlet of meter is connected by Concentration Testing circulation pipe with the preparation tank circulation port.
2. the preparation system of denitration urea liquid according to claim 1, it is characterised in that: the urea liquid preparation
The inner cavity of tank is equipped with preparation tank heating coil, the upper end entrance of the preparation tank heating coil by preparation tank heat steam valve and
Plant area's steam pipe is connected, and the lower end outlet of the preparation tank heating coil is connected by steam trap with drain trap；The urea is molten
The lower part of liquid preparation tank is equipped with thermometer and temperature sensor, and the opening and closing of the preparation tank heating steam valve is controlled by temperature biography
The temperature that sensor is detected.
3. the preparation system of denitration urea liquid according to claim 1, it is characterised in that: the preparation system further includes
Na-ion exchanger, the entrance of the Na-ion exchanger are connected with plant area's running water pipe, the outlet of the Na-ion exchanger
Be connected by soft water outlet valve with the entrance of preparation tank water injection pipe, the preparation tank water injection pipe by preparation tank fill the water pneumatic operated valve with
The preparation tank water filling port is connected；The entrance of the preparation tank water injection pipe also passes through desalination water valve and is connected with plant area desalination water pipe.
4. the preparation system of denitration urea liquid according to claim 3, it is characterised in that: the urea liquid preparation
Magnetic double level gauge is installed, the opening and closing of the preparation tank water filling pneumatic operated valve is controlled by magnetic double level gauge and is visited on the tank skin of tank
The liquid level of survey.
5. the preparation system of denitration urea liquid according to any one of claim 1 to 4, it is characterised in that: described
The top of weigh-hatching plant is equipped with the electric block of lifting urea bag.
6. the preparation system of denitration urea liquid according to any one of claim 1 to 4, it is characterised in that: described
The upper end for preparing jar agitator is stretched out from the center that the preparation tank covers and is driven by stirring motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920223079.2U CN209646298U (en) | 2019-02-22 | 2019-02-22 | The preparation system of denitration urea liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920223079.2U CN209646298U (en) | 2019-02-22 | 2019-02-22 | The preparation system of denitration urea liquid |
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| Publication Number | Publication Date |
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| CN209646298U true CN209646298U (en) | 2019-11-19 |
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| CN201920223079.2U Active CN209646298U (en) | 2019-02-22 | 2019-02-22 | The preparation system of denitration urea liquid |
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2019
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