CN209646227U - The reducing agent system of SNCR denitration - Google Patents
The reducing agent system of SNCR denitration Download PDFInfo
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- CN209646227U CN209646227U CN201920223055.7U CN201920223055U CN209646227U CN 209646227 U CN209646227 U CN 209646227U CN 201920223055 U CN201920223055 U CN 201920223055U CN 209646227 U CN209646227 U CN 209646227U
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Abstract
The utility model relates to a kind of reducing agent systems of SNCR denitration, including urea liquid preparation tank and storage tank, it is equipped with blender and sealing cover, preparation tank 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 labor intensity of the reducing agent system is low, and easily controllable and urea liquid compound concentration is accurate.
Description
Technical field
The utility model relates to a kind of denitrating system of waste incinerator, in particular to the reducing agent system of a kind of SNCR denitration
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.4. urea liquid is easy in pipeline
Wall crystallization, makes caliber become smaller, if cleaning will cause blocking not in time, once blocking is difficult to dredge again.
Utility model content
The purpose of this utility model is that overcoming problems of the prior art, a kind of reduction of SNCR denitration is provided
Agent 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 reducing agent system of a kind of SNCR denitration of the utility model, including urea liquid
Preparation tank and urea liquid storage tank, urea liquid preparation tank and urea liquid storage tank are respectively equipped with blender and sealing cover,
The lower part outlet of the urea liquid preparation tank is equipped with preparation tank outlet valve, the outlet and preparation tank of the preparation tank outlet valve
The entrance of delivery pump is connected, and the outlet of the preparation tank delivery pump conveys pneumatic operated valve and preparation tank outlet tube phase by preparing solution
Even, the outlet of preparation tank outlet tube is connected with the solution inlet at the top of urea liquid storage tank, the lower part of urea liquid storage tank
Outlet is equipped with storage tank outlet valve, and the outlet of the storage tank outlet valve is connected with the entrance of storage tank delivery pump, described to deposit
The outlet of storage tank delivery pump conveys pneumatic operated valve by storing solution and is connected with storage tank outlet tube, and preparation tank capping is equipped with urea
The top of feeding port, preparation tank water filling port and preparation tank circulation port, the preparation tank capping is equipped with the vacuum tank that feeds intake, described to feed intake
The lower part of vacuum tank is equipped with cone bucket and is connected with pneumatic baiting valve, and the lower end outlet of the pneumatic baiting valve feeds intake with the urea
Mouth 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 vacuum tank that feeds intake
The 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 delivery pump
Outlet is also connected with the entrance of circulation stirring pneumatic operated valve, the outlet and the lower inlet phase of densimeter of the circulation stirring pneumatic operated valve
Even, 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.Solution in urea liquid storage tank is by storage tank
Blender after mixing evenly, opens storage tank outlet valve and storing solution conveys pneumatic operated valve, and start storage tank delivery pump, urea
Solution is flowed out from storage tank outlet tube.
As the improvement of the utility model, the outlet of the storage tank delivery pump is also connected with the entrance of solution counterbalance valve,
The outlet of the solution counterbalance valve is connected by the other pipe of pressure release reflux with the storage tank refluxing opening of the urea liquid storage tank.When
When the pressure that storage tank conveys pump discharge is more than setting value, solution counterbalance valve is opened, and solution passes through the other pipe of pressure release reflux and storage
Tank refluxing opening flows back to urea liquid storage tank pressure release, to guarantee that the pressure of storage tank outlet tube is stablized.
The inner cavity of the urea liquid storage tank is equipped with storage tank heating dish as a further improvement of the utility model,
Pipe, the upper end entrance of the storage tank heating coil are connected by storage tank heating steam valve with plant area steam pipe, the storage
The lower end outlet of tank heating coil is connected by steam trap with drain water piping；The lower part of the urea liquid storage tank, which is equipped with, deposits
The opening and closing of tank temperature table and storage tank temperature sensor, the storage tank heating steam valve is controlled by storage tank temperature sensor
The temperature detected.Storage tank heats steam valve and opens, and storage tank heating coil is to the urea liquid in urea liquid storage tank
It is heated, storage tank temperature sensor detects after urea liquid reaches set temperature, and control system closes storage tank heating
Steam valve is then again turned on storage tank heating steam valve lower than set temperature and continues to heat.
The inner cavity of the urea liquid preparation tank is equipped with preparation tank heating dish as a further improvement of the utility model,
Pipe, the upper end entrance of the preparation tank heating coil are connected by preparation tank heating steam valve with plant area steam pipe, the preparation
The lower end outlet of tank heating coil is connected by steam trap with drain water piping；The lower part of the urea liquid preparation tank is equipped with system
The opening and closing of standby tank thermometer and preparation tank temperature sensor, the preparation tank heating steam valve is controlled by preparation tank temperature sensor
The temperature detected.Preparation tank heats steam valve and opens, and preparation tank heating coil is to the urea liquid in urea liquid preparation tank
It is heated, preparation tank temperature sensor detects after urea liquid reaches set temperature, and control system closes preparation tank heating
Steam valve is then again turned on preparation tank heating steam valve lower than set temperature and continues to 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.
Preparation tank 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 preparation tank liquidometer is detected.Pass through preparation tank liquidometer
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 preparation tank liquidometer detects urea liquid preparation tank arrival setting liquid level, then preparation tank fills the water gas
Dynamic valve is closed.
The outlet of the soft water outlet valve is connected with water softening tank water injection pipe as a further improvement of the utility model, institute
It states that water softening tank water filling pneumatic operated valve is installed on water softening tank water injection pipe and is exported and is connected with the water inlet of water softening tank, the water softening tank
Lower part water outlet is equipped with water softening tank outlet valve, and the outlet of the water softening tank outlet valve is connected with the entrance of soft water delivery pump, institute
Stating the outlet of soft water delivery pump, and general pipeline is cleaned in blowing out and soft water relief tube is connected, and the outlet of the blowing out cleaning general pipeline is equipped with
The outlet of Integral cleaning pneumatic operated valve, the Integral cleaning pneumatic operated valve is connected with the export pipeline of the storage tank outlet valve；It is described
Soft water counterbalance valve is installed, the outlet of the soft water counterbalance valve is connected with the refluxing opening of the water softening tank on soft water relief tube.Sodium
The softened water that ion-exchanger is produced enters in water softening tank through soft water outlet valve and water softening tank water injection pipe, system operation a period of time
When shutdown maintenance, water softening tank outlet valve is opened, and start soft water delivery pump, softened water cleans general pipeline and Integral cleaning gas through blowing out
Dynamic valve enters the downstream pipe of storage tank outlet valve, and the crystal and dirt to pipeline inner wall carry out Integral cleaning.When soft water is defeated
When sending the outlet superpressure of pump, soft water counterbalance valve is opened, and is flowed back by soft water relief tube to water softening tank.
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 urea liquid deployment unit in the utility model.
Fig. 2 is the flow chart that urea liquid stores supply unit in the utility model.
Fig. 3 is the flow chart of soft water unit in the utility model.
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. preparation
Tank thermometer；4g. preparation tank temperature sensor；4h. preparation tank liquidometer；5. Na-ion exchanger；5a. salt box；6. urea is molten
Liquid storage tank；6a. storage tank solution inlet；6b. storage tank refluxing opening；6c. stores jar agitator；6d. storage tank heating coil；
6e. storage tank thermometer；6f. storage tank temperature sensor；7. drain trap；8. water softening tank；9. water softening tank；The heating of 9a. water softening tank
Coil pipe；9b. water softening tank thermometer；9c. water softening tank temperature sensor；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 is pneumatic
Valve；V8. solution conveying pneumatic operated valve is prepared；V9. storage tank heats steam valve；V10. storage tank outlet valve；V11. solution counterbalance valve；
V12. storing solution conveys pneumatic operated valve；V13. water softening tank fills the water pneumatic operated valve；V14. water softening tank heats steam valve；V15. water softening tank goes out
Water valve；V16. soft water counterbalance valve；V17. Integral cleaning pneumatic operated valve；G1. plant area's running water pipe；G2. plant area's steam pipe；G3. plant area
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；G9. the other pipe of pressure release reflux；G10. storage tank outlet tube；G11. water softening tank water injection pipe；G12. soft water is let out
Pressure pipe；G13. general pipeline is cleaned in blowing out；L1.L2. filter；N1. densimeter；B1. vacuum pump；B2. preparation tank delivery pump；B3. it deposits
Storage tank delivery pump；B4. soft water delivery pump.
Specific embodiment
As shown in Figure 1, the reducing agent system of the utility model SNCR denitration includes urea liquid preparation tank 4 and urea liquid
Storage tank 6, inner cavity, which is equipped with, prepares jar agitator 4d along what axis extended, and the lower part of urea liquid preparation tank 4 is equipped with preparation tank
Outlet, the upper port of urea liquid preparation tank 4, which is equipped with, covers its closed preparation tank, prepares the upper end of jar agitator 4d from system
The center of standby potting lid 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 circulation port 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 it is connected with pneumatic baiting valve V1, the lower end outlet of pneumatic baiting valve V1 is connected with urea feeding port 4a, and feed intake 3 top of vacuum tank
Side is equipped with vacuum orifice and is connected with the pump orifice of vacuum pump B1, and the 3 top other side of vacuum tank that feeds intake passes through urine equipped with feed inlet
Plain suction tube G5 is connected with the lower part outlet of weigh-hatching plant 2, and preparation tank outlet is equipped with preparation tank outlet valve V6, preparation tank outlet
The outlet of valve V6 is connected by filter L1 with the entrance of preparation tank delivery pump B2, and the outlet of preparation tank delivery pump B2 passes through preparation
Solution conveying pneumatic operated valve V8 is connected with preparation tank outlet tube G8；The outlet of preparation tank delivery pump B2 also with circulation stirring pneumatic operated valve V7
Entrance be connected, the outlet of circulation stirring pneumatic operated valve V7 is connected with the lower inlet of densimeter N1, the upper end outlet of densimeter N1
It is connected by Concentration Testing circulation pipe G7 with preparation tank circulation port 4c.Each pneumatic operated valve provides compression sky by plant area compressed air hose G4
Gas.
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 preparation tank thermometer 4f and preparation tank temperature sensor 4g,
The opening and closing of preparation tank heating steam valve V4 is controlled by the temperature that preparation tank temperature sensor 4g is detected.Preparation tank heats steam valve
V4 is opened, and preparation tank heating coil 4e heats the urea liquid in urea liquid preparation tank 4, preparation tank temperature sensor
4g is detected after urea liquid reaches set temperature, and control system closes preparation tank and heats steam valve V4, then lower than set temperature
Preparation tank heating steam valve V4 is again turned on to continue 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.
Preparation tank liquidometer 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 preparation tank liquidometer 4h is detected.Urea liquid preparation tank can be strictly monitored by preparation tank liquidometer 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, preparation tank 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.
Its closed storage tank is covered as shown in Fig. 2, the upper port of urea liquid storage tank 6 is equipped with, urea liquid is deposited
The inner cavity of storage tank 6 be equipped with storage jar agitator 6c, store jar agitator 6c upper end from the center that storage tank cover stretching and by
Stirring motor driving.Storage tank capping is equipped with storage tank solution inlet 6a and storage tank refluxing opening 6b.Preparation tank outlet tube
It exports and is connected with the storage tank solution inlet 6a in storage tank capping.
The lower part outlet of urea liquid storage tank is equipped with storage tank outlet valve V10, and the outlet of storage tank outlet valve V10 is logical
It crosses filter L2 to be connected with the entrance of storage tank delivery pump B3, the outlet of storage tank delivery pump B3 conveys pneumatic by storing solution
Valve V12 is connected with storage tank outlet tube G10.Solution in urea liquid storage tank by storage jar agitator 6c after mixing evenly,
It opens storage tank outlet valve V10 and storing solution and conveys pneumatic operated valve V12, and start storage tank delivery pump B3, urea liquid is from depositing
Storage tank outlet tube G10 outflow.
The outlet of storage tank delivery pump B3 is also connected with the entrance of solution counterbalance valve V11, and the outlet of solution counterbalance valve V11 is logical
The other pipe G9 of pressure release reflux is crossed to be connected with the storage tank refluxing opening of urea liquid storage tank.When the pressure of the outlet storage tank delivery pump B3
When more than setting value, solution counterbalance valve V11 is opened, and solution is by pipe G9 and storage tank refluxing opening by pressure release reflux to urea liquid
Storage tank pressure release reflux, to guarantee that the pressure of storage tank outlet tube G10 is stablized.
The inner cavity of urea liquid storage tank is equipped with storage tank heating coil 6d, and the upper end entrance of storage tank heating coil 6d is logical
Storage tank heating steam valve V9 is crossed to be connected with plant area steam pipe, the lower end outlet of storage tank heating coil 6d by steam trap with it is thin
Waterpipe is connected；The lower part of urea liquid storage tank is equipped with storage tank thermometer 6e and storage tank temperature sensor 6f, storage
The opening and closing of tank heating steam valve V9 is controlled by the temperature that storage tank temperature sensor 6f is detected.Storage tank heating steam valve V9 is beaten
It opens, storage tank heating coil 6d heats the urea liquid in urea liquid storage tank, and storage tank temperature sensor 6f is visited
It measures after urea liquid reaches set temperature, control system closes storage tank and heats steam valve V9, then again lower than set temperature
Storage tank heating steam valve V9 is opened to continue to heat.
As shown in Figures 2 and 3, the outlet of soft water outlet valve is connected with water softening tank water injection pipe G11, water softening tank water injection pipe G11
On water softening tank water filling pneumatic operated valve V13 is installed and outlet is connected with the water inlet of water softening tank 9, the lower part water outlet of water softening tank 9 is pacified
Equipped with water softening tank outlet valve V15, the outlet of water softening tank outlet valve V15 is connected with the entrance of soft water delivery pump B4, soft water delivery pump
The outlet of B4 is connected with blowing out cleaning general pipeline G13 and soft water relief tube G12, and the outlet of blowing out cleaning general pipeline G13 is equipped with entirety
Pneumatic operated valve V17 is cleaned, the outlet of Integral cleaning pneumatic operated valve V17 is connected with the export pipeline of storage tank outlet valve；Soft water relief tube
Soft water counterbalance valve V16 is installed, the outlet of soft water counterbalance valve V16 is connected with the refluxing opening of water softening tank 9 on G12.Sodium ion exchange
The softened water that device is produced enters in water softening tank 9 through soft water outlet valve and water softening tank water injection pipe G11, and system runs a period of time blowing out
When maintenance, water softening tank outlet valve V15 is opened, and start soft water delivery pump B4, softened water is clear through blowing out cleaning general pipeline G13 and entirety
The downstream pipe that pneumatic operated valve V17 enters storage tank outlet valve is washed, the crystal and dirt to pipeline inner wall carry out Integral cleaning.When
When the outlet superpressure of soft water delivery pump B4, soft water counterbalance valve V16 is opened, and is flowed back by soft water relief tube G12 to water softening tank 9.
The inner cavity of water softening tank 9 is equipped with water softening tank heating coil 9a, and the upper end entrance of water softening tank heating coil 9a passes through soft water
Tank heating steam valve V14 is connected with plant area's steam pipe, and the lower end outlet of water softening tank heating coil 9a passes through steam trap and drain pipe
Road is connected；The lower part of water softening tank is equipped with water softening tank thermometer 9b and water softening tank temperature sensor 9c, and water softening tank heats steam valve
The opening and closing of V14 is controlled by the temperature that water softening tank temperature sensor 9c is detected.Water softening tank heats steam valve V14 and opens, water softening tank
Heating coil 9a heats the softened water in water softening tank, and water softening tank temperature sensor 9c detects water temperature and reaches setting value
Afterwards, control system closes water softening tank and heats steam valve V14, and water softening tank heating steam valve V14 is then again turned on lower than set temperature
Continue to heat.
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 (7)
1. a kind of reducing agent system of SNCR denitration, including urea liquid preparation tank and urea liquid storage tank, urea liquid system
Standby tank and urea liquid storage tank are respectively equipped with blender and sealing cover, and the lower part outlet of the urea liquid preparation tank is equipped with
The outlet of preparation tank outlet valve, the preparation tank outlet valve is connected 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, outlet and the urea liquid of preparation tank outlet tube are deposited
The solution inlet of tank top is connected, and the lower part outlet of urea liquid storage tank is equipped with storage tank outlet valve, the storage tank
The outlet of outlet valve is connected with the entrance of storage tank delivery pump, and the outlet of the storage tank delivery pump conveys gas by storing solution
Dynamic valve is connected with storage tank outlet tube, it is characterised in that: preparation tank capping is equipped with urea feeding port, preparation tank water filling port and system
Standby tank circulation port, the top of the preparation tank capping are equipped with the vacuum tank that feeds intake, the lower part of the vacuum tank that feeds intake be equipped with cone bucket and
It is connected with pneumatic baiting valve, the lower end outlet of the pneumatic baiting valve is connected with the urea feeding port, the vacuum tank that feeds intake
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 logical equipped with feed inlet
Urea suction tube is crossed to be connected with the lower part outlet of weigh-hatching plant；The outlet of the preparation tank delivery pump also with circulation stirring pneumatic operated valve
Entrance be connected, the outlet of the circulation stirring pneumatic operated valve is connected with the lower inlet of densimeter, brings out on the densimeter
Mouth is connected by Concentration Testing circulation pipe with the preparation tank circulation port.
2. the reducing agent system of SNCR denitration according to claim 1, it is characterised in that: the storage tank delivery pump goes out
Mouth is also connected with the entrance of solution counterbalance valve, and the outlet of the solution counterbalance valve passes through the other pipe of pressure release reflux and the urea liquid
The storage tank refluxing opening of storage tank is connected.
3. the reducing agent system of SNCR denitration according to claim 1, it is characterised in that: the urea liquid storage tank
Inner cavity is equipped with storage tank heating coil, and the upper end entrance of the storage tank heating coil heats steam valve and plant area by storage tank
Steam pipe is connected, and the lower end outlet of the storage tank heating coil is connected by steam trap with drain water piping；The urea liquid
The lower part of storage tank is equipped with storage tank thermometer and storage tank temperature sensor, the opening and closing of the storage tank heating steam valve by
Control the temperature detected in storage tank temperature sensor.
4. the reducing agent system of SNCR denitration according to claim 1, it is characterised in that: the urea liquid preparation tank
Inner cavity is equipped with preparation tank heating coil, and the upper end entrance of the preparation tank heating coil heats steam valve and plant area by preparation tank
Steam pipe is connected, and the lower end outlet of the preparation tank heating coil is connected by steam trap with drain water piping；The urea liquid
The lower part of preparation tank is equipped with preparation tank thermometer and preparation tank temperature sensor, the opening and closing of the preparation tank heating steam valve by
Control the temperature detected in preparation tank temperature sensor.
5. the reducing agent system of SNCR denitration according to claim 1, it is characterised in that: the preparation system further include sodium from
Sub- exchanger, the entrance of the Na-ion exchanger are connected with plant area's running water pipe, and the outlet of the Na-ion exchanger passes through
Soft water outlet valve is connected 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 it is described
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.
6. the reducing agent system of SNCR denitration according to claim 5, it is characterised in that: the urea liquid preparation tank
Preparation tank liquidometer is installed, the opening and closing of the preparation tank water filling pneumatic operated valve is controlled by what preparation tank liquidometer was detected on tank skin
Liquid level.
7. the reducing agent system of SNCR denitration according to claim 5, it is characterised in that: the outlet of the soft water outlet valve
Be connected with water softening tank water injection pipe, water softening tank water filling pneumatic operated valve is installed on the water softening tank water injection pipe and outlet and water softening tank into
The mouth of a river is connected, and the lower part water outlet of the water softening tank is equipped with water softening tank outlet valve, the outlet of the water softening tank outlet valve with it is soft
The entrance of water delivery pump is connected, and the outlet of the soft water delivery pump cleans general pipeline with blowing out and soft water relief tube is connected, described to stop
The outlet of furnace cleaning general pipeline is equipped with Integral cleaning pneumatic operated valve, and the outlet of the Integral cleaning pneumatic operated valve and the storage tank export
The export pipeline of valve is connected；Soft water counterbalance valve is installed on the soft water relief tube, the outlet of the soft water counterbalance valve with it is described
The refluxing opening of water softening tank is connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920223055.7U CN209646227U (en) | 2019-02-22 | 2019-02-22 | The reducing agent system of SNCR denitration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920223055.7U CN209646227U (en) | 2019-02-22 | 2019-02-22 | The reducing agent system of SNCR denitration |
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| CN209646227U true CN209646227U (en) | 2019-11-19 |
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ID=68524793
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| CN201920223055.7U Active CN209646227U (en) | 2019-02-22 | 2019-02-22 | The reducing agent system of SNCR denitration |
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2019
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