CN206730900U - Denitration system reducing agent urea solution prepare from stirring system - Google Patents
Denitration system reducing agent urea solution prepare from stirring system Download PDFInfo
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- CN206730900U CN206730900U CN201720469586.5U CN201720469586U CN206730900U CN 206730900 U CN206730900 U CN 206730900U CN 201720469586 U CN201720469586 U CN 201720469586U CN 206730900 U CN206730900 U CN 206730900U
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- dissolving tank
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Abstract
The utility model is related to prepared by a kind of denitration system reducing agent urea solution from stirring system, be laid with steam(-)coil in urea dissolving tank inner bottom part ring, urea dissolving be provided with urea dissolving tank from stirring comb；Urea dissolving connects from the entrance of stirring comb with the outlet of urea dissolving pump；Urea dissolving at the top of urea dissolving tank is provided with multiple urea granules charging distributor pipes from radial equipartition on the urea dissolving tank on stirring comb periphery, the exit lower end of each urea granules charging distributor pipe can the multiple feeding branches pipes tilted down of radial equipartition, tangential open slot vertically downward is provided with each feeding branches pipe.The system can make urea granules uniform feeding, be easy to the diffusion of urea；Possess from agitating function, may replace urea and dissolve electromechanical agitator, simplify technology controlling and process and reduce the fault point, effectively reduce investment and maintenance cost, safe and reliable to operation, can be widely applied in urea liquid preparation system.
Description
Technical field
The utility model belongs to suitable for the environmentally friendly fume treatment field such as large-sized station boiler, waste heat boiler, is related to denitration
The technology of preparing of reducing agent urea solution in system, more particularly to stirring certainly prepared by a kind of denitration system reducing agent urea solution
System.
Background technology
To tackle increasingly harsh environmental requirement, NOx discharge is reduced, gas denitrifying technology arises at the historic moment.Flue gas at present
Method of denitration mainly by low-NO_x combustion technology Sources controlling NOx generation, then using selective catalytic reduction (SCR)
Or non-selective catalytic reduction (SNCR) makes reducing agent be reacted with the NOx in flue gas, N is generated2And H2O, so as to reduce NOx's
Concentration of emission.The reducing agent used in denitrating system is mainly urea, liquefied ammonia and ammonia, and urea is higher safe and reliable with it
Property is more and more applied.
Traditional urea liquid preparation technology is：A certain amount of demineralized water is injected into urea dissolving tank, by steam plus
Demineralized water is heated to certain temperature by hot coil or electric heater unit, is then turned on urea dissolving tank electromechanics agitator and urea
Pump is dissolved, injects urea into urea dissolving tank through single straight tube by way of urea feed bin or urea tank car Geldart-D particle
Particle；Under the continuous agitaion of agitator, urea liquid is dissolved blowback and flow on urea dissolving tank pipeline by urea pacifies
The density of the densitometer monitoring solution of dress, finally it is configured to the urea liquid of certain concentration.
The problem of this technique is present be：1st, need to use electromechanical agitator in urea course of dissolution, not only increase equipment
The cost of investment reinforced and brought with casing top is purchased, and adds the cost of overhaul that equipment is run and regular maintenance is brought；
2nd, the stirring action of agitator only has larger perturbed force near impeller, and more remote from impeller, stirring action is poorer；Moreover, stir
The presence for mixing device make it that technology controlling and process is complex, is unfavorable for the optimization for controlling and operating, and agitator is single setting, without standby
With adding potential trouble point to the reliability service of system；3rd, urea granules are single straight feed pipe, and urea granules disperse
Inequality, it is unfavorable for the dissolving of urea；4th, two urea dissolving pumps of every urea dissolving tank conventional arrangement, one standby setting of a fortune, are passed
System technique underuses existing equipment, causes waste.
Retrieved by patent document, find following two Patents documents：
1st, the agitating device (CN203425808U) of a kind of urea reaction kettle, including drive device, agitating shaft and blade, institute
State drive device and be connected with agitating shaft, the other end of agitating shaft is provided with blade, and the blade is semicircular arc, is set on the blade
There is bracing piece, the bracing piece is fixed on agitating shaft, and the agitating shaft, blade and bracing piece are provided with anticorrosive coat；Realize structure
Simply, the planform of blade and bracing piece can be converted, is effectively sufficiently stirred, and agitating device can be prevented
Corrosion, increase its service life.
2nd, a kind of urea aqueous solution by dewaxing reactor agitating device (CN201711105U), it is by axle, blade, scraper plate institute
Composition, by being diamond structure by blade construction, it is evenly distributed on axle, blade pitgh is the 8-12 of rhombus short diagonal length
Times, the length catercorner length ratio of rhombus is 5: 2, and the short diagonal plane of its blade is with axial into 35 ° of angles；Set on the top of rhombus blade
Scraper plate is equipped with, for scraper plate with axially in parallel, the length of scraper plate is 1.5-3 times of method of blade pitgh, can be efficiently against old
The defects of formula product is present.
By the contrast of technical characteristic, patent document disclosed above is in the purpose of utility model and skill of the present utility model application
Art scheme differs.
Utility model content
The purpose of this utility model is in place of overcome the deficiencies in the prior art, there is provided a kind of denitration system reducing agent urea
Solution prepare from stirring system, realize the urea dissolving automatic stirring function without electromechanical agitator, while have urea granules concurrently
The characteristics of uniform feeding, ensure the normal work of urea dissolving tank.
The utility model realizes that the technical scheme of purpose is：
A kind of denitration system reducing agent urea solution prepare from stirring system, laid in urea dissolving tank inner bottom part ring
There is steam(-)coil, urea dissolving is provided with urea dissolving tank and is existed from stirring comb, urea dissolving from stirring comb
Urea dissolving tank inside points radial communication is fixed with the urea dissolving of individual layer or multilayer from stirring branch pipe, is dissolved in each urea
Nozzle has been uniformly arranged from stirring branch pipe；Urea dissolving connects from the entrance of stirring comb with the outlet of urea dissolving pump, its
Between reflux pipeline on be provided with densitometer and urea liquid return valve；The entrance of urea dissolving pump connects with urea dissolving tank
It is logical, dissolving Pump Suction Nozzle valve is additionally provided with the pipeline that urea dissolving pump connects with urea dissolving tank, urea dissolving pump
Outlet connects urea liquid holding vessel by reservoir valve；Comb periphery is stirred in urea dissolving at the top of urea dissolving tank certainly
Urea dissolving tank on radial equipartition be provided with multiple urea granules charging distributor pipes, each urea granules charging distributor pipe goes out
Mouthful multiple feeding branches pipes tilted down of lower end radial equipartition, vertically downward tangential is provided with each feeding branches pipe
Open slot.
Moreover, the urea dissolving pump is connected by two branch lines with urea dissolving tank, on two branch lines
Urea dissolving pump be provided with dissolving Pump Suction Nozzle valve.
Moreover, the urea dissolving is in downward inclination from the nozzle and urea dissolving for stirring branch pipe setting from branch pipe is stirred
Angle
Moreover, tangential open slot vertically downward set on each feeding branches pipe, the tangential open slot edge
Urea granules flow direction, the tapered gradually increase of size of tangential open slot.
Moreover, the urea dissolving is arranged on the axis position in urea dissolving tank from stirring comb.
The advantages of the utility model and good effect are：
1st, the system is without electromechanical agitator, can make full use of existing equipment provide power from agitating device, improve
The overall economy quality of denitrating system, further optimize and simplify technology controlling and process so that the reliability and stability enhancing of system operation.
2nd, the system makes urea granules uniform feeding, is easy to the diffusion of urea；Possess from agitating function, it is molten to may replace urea
Electromechanical agitator is solved, technology controlling and process is thereby simplify and reduces the fault point, effectively reduces investment and maintenance cost, it is safe for operation
Reliably, can be widely applied in urea liquid preparation system.
Brief description of the drawings
Fig. 1 is the utility model overall structure diagram；
Fig. 2 is Fig. 1 A-A to cross-sectional view；
The urea granules that Fig. 3 is Fig. 1 feed distributor pipe branch tube opening schematic diagram.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the utility model is described in further detail, following examples are descriptive
, it is not limited, it is impossible to once limit the scope of protection of the utility model.
Prepared by a kind of denitration system reducing agent urea solution is from stirring system, the structure of the system：
Referring to Fig. 1,2,3, steam(-)coil 11 is laid with the inner bottom part ring of urea dissolving tank 5, in urea dissolving tank
Urea dissolving is inside provided with from stirring comb 4, urea dissolving from stirring comb in urea dissolving tank inside points radial communication to consolidate
Equipped with individual layer or the dissolving of the urea of multilayer from stirring branch pipe 12, it has been uniformly arranged and has inclined from stirring branch pipe in the dissolving of each urea
Nozzle 13 obliquely, the specification of nozzle are selected according to actual flow, and the quantity of nozzle is then by stirring intensity and urea dissolving tank
Size determines.In the present embodiment accompanying drawing, the urea dissolving is two upper and lower rows from branch pipe is stirred, and often urination element dissolves and stirred certainly
Mix four that branch pipe is radial equipartition.
Urea dissolving connects from the entrance of stirring comb with the outlet of urea dissolving pump 9, is set on reflux pipeline therebetween
Have densitometer 6 and a urea liquid return valve 7, the entrance of urea dissolving pump connect with urea dissolving tank, urea dissolve pump and
Dissolving Pump Suction Nozzle valve 10 is additionally provided with the pipeline of urea dissolving tank connection, the outlet of urea dissolving pump is by storing pot valve
Door 8 connects urea liquid holding vessel.In the present embodiment accompanying drawing, the urea dissolving pump is two, i.e., urea dissolving pump passes through two
Bar branch line is connected with urea dissolving tank, and the urea dissolving pump on two branch lines is provided with dissolving Pump Suction Nozzle valve
Door；(most of to set two urea dissolving pumps in detailed programs, a fortune one is standby；It is individual it is other can set one, i.e., without standby；Or
Three, two standby, two contents that should can not limit utility model in embodiment of fortune)
Urea dissolving at the top of urea dissolving tank is provided with from radial equipartition on the urea dissolving tank on stirring comb periphery
Multiple urea granules feed distributor pipe 2, entrance and extraneous the urea feed bin or strength of each urea granules charging distributor pipe
Conveying tank car is connected, the multiple feeding branches pipes tilted down of exit lower end radial equipartition of each urea granules charging distributor pipe
3, tangential open slot 14 vertically downward is provided with each feeding branches pipe, referring to Fig. 3, the tangential open slot is along urea
Grain flow direction, the tapered gradually increase of size of tangential open slot, so that the charging of urea granules can be in feeding branches pipe
On be evenly distributed.
The temperature and liquid level indicator instrument of ventilating fan 1 and routine are also equipped with urea dissolving tank.
Preferably, the urea dissolving is arranged on the axis position in urea dissolving tank from stirring comb.
The valve used in the utility model is preferably electrically operated valve.
Operation principle of the present utility model is：
During urea dissolves, urea liquid return valve is opened, closes reservoir valve, urea dissolving pump passes through urea
Dissolving is back in urea dissolving tank from stirring comb；After the completion of urea preparation, reservoir valve is opened, closes urea liquid
Return valve, urea liquid are delivered in urea liquid holding vessel.It can be needed to pacify according to preparation technology on urea reflux pipeline
Densitometer is filled, to monitor the density of urea liquid.
The utility model use above-mentioned preparation facilities carry out the concrete technology of urea liquid preparation for：
(1) plant area's desalination penstock is opened, a certain amount of demineralized water is injected into urea dissolving tank, opens steam heating dish
Tube valve, demineralized water is heated to more than 70 DEG C, then by steam valve automatic interlock, controls the temperature of solution to be not less than 50
℃。
(2) urea liquid is closed to the valve of urea liquid holding vessel, is opened urea dissolving pump and is exported to urea dissolving certainly
The valve of comb is stirred, the pipeline that holding urea dissolving pump is back to urea dissolving tank by urea dissolving from stirring comb is smooth
It is logical.
(3) densitometer is such as installed in return line, then needs to open the valve before and after densitometer, closes its bypass valve；Open
Ventilating fan is opened, prevents urea dissolving tank from forming too high malleation in urea preparation process.
(4) urea granules are injected into urea dissolving tank by urea feed bin or Geldart-D particle tank car, urea granules are through urea
Particulate charge distributor pipe is uniformly distributed charging, avoids single straight feed pipe from excessively concentrating and is not easy scattered deficiency；In urea
In grain adition process, the constantly suction of urea dissolving pump positioned at urea dissolving pot bottom temperature is higher, solution that density is relatively low, warp
Urea dissolving is back to the region that upper strata temperature is relatively low, urea density is higher from stirring comb, and urea liquid dissolves certainly through urea
Stir comb on nozzle it is spouting, because every layer of nozzle is to arrange diagonally downward, by nozzle outflow solution have compared with
Big oblique impulsive force, under the synergy of every layer of nozzle, urea liquid does ring along impact force direction and moved, and accelerates urine
The blending and disturbance of plain solution, the speed of urea dissolving is improved, meanwhile, the uniform comb of stirring certainly of multilayer can make urea liquid
Sufficiently blending, is more likely formed the homogeneous solution of density.
(5) by the densitometer on reflux pipeline or other measurement apparatus, the density or composition of Real Time Observation urea liquid,
After the urea liquid of certain concentration or component is completed in configuration, urea liquid is opened to the valve of urea liquid holding vessel, is closed
Urea dissolves the return valve of pump, and it is standby that urea liquid is delivered into urea liquid holding vessel.
(6) heating steam valve, urea dissolving pump and ventilating fan are closed successively, rinse urea liquid pipeline, now, urea
Prepared by solution completes.
Equipment used in the utility model, it is common equipment in the art unless otherwise specified, this practicality is new
Method used in type, it is conventional method in the art unless otherwise specified.
Claims (5)
1. a kind of denitration system reducing agent urea solution prepare from stirring system, it is characterised in that：The bottom in urea dissolving tank
Portion's ring is laid with steam(-)coil, urea dissolving is provided with urea dissolving tank from stirring comb, urea dissolving is certainly
Branch pipe is stirred in the urea dissolving that stirring comb is fixed with individual layer or multilayer in urea dissolving tank inside points radial communication certainly, every
The dissolving of one urea has been uniformly arranged nozzle from stirring branch pipe；Urea dissolving dissolves going out for pump from the entrance and urea of stirring comb
Mouth connects, and densitometer and urea liquid return valve are provided with reflux pipeline therebetween；Urea dissolves the entrance and urea of pump
Dissolving tank is connected, and dissolving Pump Suction Nozzle valve, urea are additionally provided with the pipeline that urea dissolving pump connects with urea dissolving tank
The outlet for dissolving pump connects urea liquid holding vessel by reservoir valve；Urea dissolving at the top of urea dissolving tank is stirred certainly
Radial equipartition is provided with multiple urea granules charging distributor pipes, each urea granules charging point on the urea dissolving tank on comb periphery
The multiple feeding branches pipes tilted down of the exit lower end radial equipartition of stringing, be provided with each feeding branches pipe vertically to
Under tangential open slot.
2. denitration system reducing agent urea solution according to claim 1 prepare from stirring system, it is characterised in that：Institute
State urea dissolving pump by two branch lines with urea dissolving tank to be connected, the urea dissolving pump on two branch lines is all provided with
It is equipped with dissolving Pump Suction Nozzle valve.
3. denitration system reducing agent urea solution according to claim 1 prepare from stirring system, it is characterised in that：Institute
It is in downward angle of inclination that urea dissolving, which is stated, from the nozzle and urea dissolving for stirring branch pipe setting from branch pipe is stirred.
4. denitration system reducing agent urea solution according to claim 1 prepare from stirring system, it is characterised in that：Institute
State on each feeding branches pipe set tangential open slot vertically downward, the tangential open slot is along urea granules flowing side
To the tapered gradually increase of size of tangential open slot.
5. denitration system reducing agent urea solution according to any one of Claims 1-4 prepare from stirring system, it is special
Sign is：The urea dissolving is arranged on the axis position in urea dissolving tank from stirring comb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720469586.5U CN206730900U (en) | 2017-05-02 | 2017-05-02 | Denitration system reducing agent urea solution prepare from stirring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720469586.5U CN206730900U (en) | 2017-05-02 | 2017-05-02 | Denitration system reducing agent urea solution prepare from stirring system |
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| CN206730900U true CN206730900U (en) | 2017-12-12 |
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ID=60562342
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720469586.5U Active CN206730900U (en) | 2017-05-02 | 2017-05-02 | Denitration system reducing agent urea solution prepare from stirring system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106902665A (en) * | 2017-05-02 | 2017-06-30 | 航天环境工程有限公司 | A kind of denitration system reducing agent urea solution prepare from stirring system |
| CN114733336A (en) * | 2022-04-08 | 2022-07-12 | 华润电力(宁武)有限公司 | System for preventing urea solution conveying pipeline from being blocked |
| CN117225261A (en) * | 2023-11-10 | 2023-12-15 | 河北华晨药业集团有限公司 | Sodium carbonate slurry tank |
-
2017
- 2017-05-02 CN CN201720469586.5U patent/CN206730900U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106902665A (en) * | 2017-05-02 | 2017-06-30 | 航天环境工程有限公司 | A kind of denitration system reducing agent urea solution prepare from stirring system |
| CN114733336A (en) * | 2022-04-08 | 2022-07-12 | 华润电力(宁武)有限公司 | System for preventing urea solution conveying pipeline from being blocked |
| CN117225261A (en) * | 2023-11-10 | 2023-12-15 | 河北华晨药业集团有限公司 | Sodium carbonate slurry tank |
| CN117225261B (en) * | 2023-11-10 | 2024-02-20 | 河北华晨药业集团有限公司 | Sodium carbonate slurry tank |
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