CN202666710U - Concentration-adjustable urea solution preparation device utilizing pneumatic energy to load - Google Patents
Concentration-adjustable urea solution preparation device utilizing pneumatic energy to load Download PDFInfo
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- CN202666710U CN202666710U CN201220285043.5U CN201220285043U CN202666710U CN 202666710 U CN202666710 U CN 202666710U CN 201220285043 U CN201220285043 U CN 201220285043U CN 202666710 U CN202666710 U CN 202666710U
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Abstract
The utility model relates to a concentration-adjustable urea solution preparation device utilizing pneumatic energy to load. A urea bulk tanker, an air compressor, a compressed air refrigerated air dryer, a compressed air precision filter, a compressed air storage tank, an adjustment control valve, a feed buffer tank, a dissolving tank, a dissolving pump, a dissolving tank water inlet electric control valve, a steam pipe coil heating device, a solution filter, a stirring device, a circulation supply pump, a constant pressure device, a solution storage tank, a drain tank, a drain pump, back washing pipes, a densitometer, a liquid level meter, a control device and a discharge valve group are matched with one another to constitute the concentration-adjustable urea solution preparation device. By means of the pneumatic energy conveying method, the urea bulk tanker is used for enabling urea particles to be directly conveyed to the dissolving tank to be dissolved, and compressed air is exhausted through a dust collection air exhausting device of the feed buffer tank. Urea solution pipes are respectively provided with the anti-blocking back washing pipes, a urea dissolving process is controlled by the densitometer and the liquid level meter on a dissolving circulation pipe of the dissolving tank, and the operation is controlled in fully-automatic mode.
Description
Technical field
The utility model relates to a kind of adjustable urea solution preparing device of the concentration in storehouse on the strength that adopts.
Background technology
Fossil fuel can produce a large amount of nitrogen oxide (NO in combustion process
X), it is generally by NO and NO
2Form.Nitrogen oxide is a kind of toxic gas, and NO can make people's nervous centralis paralysis and cause death, NO
2Can cause asthma and pulmonary emphysema, destroy people's the heart, lung, liver, kidney and make the afunction of hematopoietic tissue.Can drop in ground, the water by dry deposition and wet deposition dual mode after nitrogen oxide is discharged in the atmosphere, form nitrate or nitric acid, the extent of injury of nitric acid type acid rain is larger than sulfuric acid rain.Therefore national proposition will be controlled the discharging of nitrogen oxide.Gas denitrifying technology is to utilize reducing agent ammonia (NH
3) with flue gas in NO
XReduction reaction occurs generate harmless N
2And H
2O enters atmosphere.Reducing agent NH3 can obtain by liquefied ammonia evaporation and urea decomposition.Urea obtains denitrification reducing agent NH as a kind of safety
3Raw material in flue gas denitrification system, obtain widely applying.Utilize urea decomposition to obtain NH
3, at first urea granules to be dissolved as certain density urea liquid, through the urea liquid supply system for denitrating system.Commodity urea is generally the solid granulates of every bag of 50 kilograms of packings, and the particle diameter of urea commonly used is 0.8-2.5mm.Also do not adopt at home urea groove tank car in bulk transportation of urea particle and utilize storehouse on the strength to prepare the device of urea liquid.Urea granules is very easy to the moisture absorption and hardens, and then stops up the pipeline that adopts storehouse mode on traditional urea granules.The denitration urea liquid preparation system of Present Domestic adopts artificial broken bag material-uploading style, and it is for subsequent use to go to the urea liquid holding vessel after blanking port enters the dissolving tank dissolving.Pass through the urea liquid circulation line for denitrating system through the urea cycle transfer pump again.Certain density urea liquid is crystallization when temperature is low easily, can cause the obstruction of urea liquid pipeline, thereby affect the normal operation of whole denitrating system.Traditional urea liquid preparation system can only Artificial Control, and urea granules is carried and stored, the urea liquid pipeline easily stops up, and operational reliability is poor, labor strength is large, and automaticity is low, and efficiency is low.
The utility model content
For problems of the prior art, the purpose of this utility model is to provide a kind of technical scheme that adopts the adjustable urea solution preparing device of the concentration in storehouse on the strength.
The adjustable urea solution preparing device of concentration in storehouse on the described employing strength, comprise urea groove tank car in bulk, air compressor, the compressed air cooling driers, precision filter of compressed air, compressed air reservoir, adjusting control valve, the charging surge tank, dissolving tank, the dissolving pump, dissolving tank water inlet electric control valve, the steam pipe coil heater, solution strainer, agitator, the circulation-supplied pump, constant-voltage equipment, the solution holding vessel, drain tank, drainage pump, counter-flushing pipeline, densitometer, liquid level gauge, control device and bleeder valve group, air compressor connects the compressed air cooling driers, the compressed air cooling driers connects precision filter of compressed air, precision filter of compressed air connects compressed air reservoir, compressed air reservoir connects adjusting control valve, adjusting control valve connects urea groove tank car in bulk, urea groove tank car in bulk connects the charging surge tank, charging surge tank feed opening connects the dissolving tank charging aperture, the dissolving tank water inlet connects dissolving tank water inlet electric control valve, the dissolving tank discharging opening connects solution strainer, solution strainer connects the dissolving pump inlet, the dissolving pump discharge connects the bleeder valve group, the bleeder valve group connects the import of solution holding vessel, the outlet of solution holding vessel connects the circulation-supplied pump inlet, and the circulation-supplied pump discharge connects constant-voltage equipment; The drain tank outlet connects the drainage pump import, and the drainage pump outlet connects counter-flushing pipeline, and counter-flushing pipeline is connected with charging surge tank, dissolving pump discharge, circulation-supplied pump discharge respectively.
The adjustable urea solution preparing device of concentration in storehouse on the described employing strength, be provided with spray pipe network and the exhaust apparatus that gathers dust in the described charging surge tank, the exhaust apparatus that gathers dust is arranged on the spray pipe network top, and the charging surge tank is connected with the exhaust apparatus that gathers dust, and the exhaust apparatus that gathers dust communicates with atmosphere.
The adjustable urea solution preparing device of concentration in storehouse is equipped with liquid level gauge and thermometer on described dissolving tank and the solution holding vessel on the described employing strength.
The adjustable urea solution preparing device of concentration in storehouse on the described employing strength, described control device connect respectively liquid level gauge, densitometer and dissolving tank water inlet electric control valve.
The adjustable urea solution preparing device of concentration in storehouse on the described employing strength, the inclination angle of the inner hopper of described urea groove tank car in bulk is 28 degree, material bin adopts many chamber structures.
The adjustable urea solution preparing device of concentration in storehouse on the described employing strength, the import of described steam pipe coil heater links to each other with vapour source, and the outlet of steam pipe coil heater connects the drain tank import.
The adjustable urea solution preparing device of concentration in storehouse on the described employing strength, described spray pipe network is connected with counter-flushing pipeline.
The utility model adopts pneumatic conveying mode, utilize urea groove tank car in bulk that urea granules is directly delivered into the dissolving tank dissolving, compressed air enters atmosphere by the exhaust apparatus that gathers dust of charging surge tank, the charging surge tank is provided with anti-blocking spray pipe network, the urea liquid pipeline is equipped with anti-blocking counter-flushing pipeline, by the densitometer on the dissolving tank dissolving circulation pipe and dissolving tank liquid level gauge control urea course of dissolution, realize auto-controll operation fully.Can be applied to the SCR(selective catalytic reduction) or SNCR(SNCR method) preparation of denitration system reducing agent solution.
The utlity model has following advantage is:
1. solve the hardship of the manpower of urea carrying, broken bag, improved labor productivity;
2. realize the Automatic Control of urea liquid preparation;
3. urea granules is realized the totally-enclosed operation, and is on-the-spot clean and tidy clean;
4. without obstruction, reliable;
5. the female pipe of circulation-supplied arranges constant-voltage equipment, greatly improves the urea liquid security of supply.
Description of drawings
Fig. 1 is general structure schematic diagram of the present utility model;
Fig. 2 is the structural representation of charging surge tank;
Fig. 3 is the structural representation of the inner hopper of urea groove tank car in bulk;
Among the figure: 1-urea groove tank car in bulk, the 2-air compressor, 3-compressed air cooling driers, the 4-precision filter of compressed air, the 5-compressed air reservoir, the 6-adjusting control valve, 7-charging surge tank, the 8-dissolving tank, 9-dissolves pump, 10-dissolving tank water inlet electric control valve, 11-steam pipe coil heater, the 12-solution strainer, the 13-agitator, 14-circulation-supplied pump, the 15-constant-voltage equipment, 16-solution holding vessel, the 17-drain tank, the 18-drainage pump, the 19-counter-flushing pipeline, the 20-densitometer, the 21-liquid level gauge, the 22-control device, 23-bleeder valve group, the 24-spray pipe network, the 25-exhaust apparatus that gathers dust, 26-fluidisation pipe network.
The specific embodiment
Below in conjunction with Figure of description the utility model is described further:
As shown in Figure 1, adopt the adjustable urea solution preparing device of concentration in storehouse on the strength, comprise urea groove tank car in bulk, air compressor, the compressed air cooling driers, precision filter of compressed air, compressed air reservoir, adjusting control valve, the charging surge tank, dissolving tank, the dissolving pump, dissolving tank water inlet electric control valve, the steam pipe coil heater, solution strainer, agitator, the circulation-supplied pump, constant-voltage equipment, the solution holding vessel, drain tank, drainage pump, counter-flushing pipeline, densitometer, liquid level gauge, control device, the bleeder valve group, spray pipe network, exhaust apparatus and fluidisation pipe network gather dust, air compressor connects the compressed air cooling driers, the compressed air cooling driers connects precision filter of compressed air, precision filter of compressed air connects compressed air reservoir, compressed air reservoir connects adjusting control valve, adjusting control valve connects urea groove tank car in bulk, urea groove tank car in bulk connects the charging surge tank, charging surge tank feed opening connects the dissolving tank charging aperture, the dissolving tank water inlet connects dissolving tank water inlet electric control valve, the dissolving tank discharging opening connects solution strainer, solution strainer connects the dissolving pump inlet, the dissolving pump discharge connects the bleeder valve group, the bleeder valve group connects the import of solution holding vessel, the outlet of solution holding vessel connects the circulation-supplied pump inlet, and the circulation-supplied pump discharge connects constant-voltage equipment; The drain tank outlet connects the drainage pump import, and the drainage pump outlet connects counter-flushing pipeline, and counter-flushing pipeline is connected with charging surge tank, dissolving pump discharge, circulation-supplied pump discharge respectively.
Urea of the present utility model groove tank car in bulk is to be converted by common powder hopper tank car, it mainly is the internal structure of modified slot tank car, change the inclination angle of the inner hopper of regular troughs tank car into 28 degree (as shown in Figure 3), the fluidization air that is arranged so that of fluidisation pipe network changes fluidisation all around into by the both sides fluidisation, and material bin adopts many storehouses to arrange.
The import of steam pipe coil heater links to each other with vapour source, and the outlet of steam pipe coil heater connects the drain tank import.
Dissolving tank is connected with solution strainer, and solution strainer is connected with the dissolving pump, and the dissolving pump is connected with circulation line, is provided with agitator and heat(ing) coil in the dissolving tank, and dissolving tank is linked to each other with the demineralized water interface by water intaking valve, obtains the required water source of dissolving.
The dissolving pump intake arranges filter, and the dissolving pump discharge arranges the bleeder valve group, and the bleeder valve group links to each other with solution holding vessel entrance.
Be equipped with liquid level gauge, thermometer on dissolving tank and the solution holding vessel; Circulation line is provided with densitometer, is used for automatically control; Control device connects respectively liquid level gauge, densitometer, dissolving tank water inlet electric control valve.
Pneumatic transporting is served bin device and is comprised air compressor, compressed air cooling driers, precision filter of compressed air, compressed air reservoir, adjusting control valve, the urea groove tank car in bulk that connects successively; The discharging opening of urea groove tank car in bulk is connected with charging surge tank charging aperture by flexible pipe, and the compressed air reservoir outlet is provided with Pressure gauge, thermometer, is used for monitoring the compressed air quality.
Be provided with the spray pipe network that prevents that urea granules from stopping up in the charging surge tank, the spray pipe network top is provided with the exhaust apparatus that gathers dust (as shown in Figure 2), the charging surge tank is connected with the exhaust apparatus that gathers dust, and the compressed air of transport urea particle enters atmosphere by the exhaust apparatus that gathers dust.
Urea dissolving and conveying device arrange the backwash loop: be comprised of drain tank, drainage pump, control valve group and counter-flushing pipeline.Drain tank connects drainage pump, and the drainage pump outlet is connected with counter-flushing pipeline, and counter-flushing pipeline is connected with spray pipe network import, dissolving pump discharge, the outlet of circulation pipe transfer pump respectively.
The dissolving delivery side of pump is connected to backwash tube, and the circulation-supplied delivery side of pump is connected to backwash tube, and the backwater of backwash tube enters dissolving tank and re-uses.
The urea liquid pipeline is connected with counter-flushing pipeline, and the backwater of backwash tube enters dissolving tank and re-uses.
The charging aperture of solution holding vessel is connected with the bleeder valve group, the discharging opening of solution holding vessel is connected with the import of urea cycle transfer pump by filter, the outlet of urea cycle transfer pump is connected to the urea liquid constant-voltage equipment, and the outlet of urea liquid constant-voltage equipment is connected to the circulation-supplied pipe.
Compressed air flow process of the present utility model is: air compressor-compressed air cooling driers-precision filter of compressed air-compressed air reservoir-adjusting control valve-urea groove tank car air inlet in bulk-urea groove tank car silo in bulk-urea groove tank car discharging opening in bulk-charging surge tank-exhaust apparatus-exhaust of gathering dust.
Urea granules flow process of the present utility model is: urea groove tank car silo in bulk-urea groove tank car discharging opening in bulk-charging surge tank-charging surge tank tremie pipe-dissolving tank.
Counter-flushing process of the present utility model is: 1. charging surge tank cleaning process is: drain tank-drainage pump-spray pipe network-charging surge tank-dissolving tank; 2. dissolving tank circulation line flushing flow process is: drain tank-drainage pump-dissolving pump discharge-dissolving circulation pipeline-dissolving tank; 3. circulation-supplied flushing of pipeline flow process is: drain tank-drainage pump-circulation-supplied pump discharge-circulation line-dissolving tank.
The utility model is regulated inflow and is controlled dissolving tank urea liquid density and liquid level by control urea charging rate, and realizes continuously, automatically preparing the urea liquid that variable concentrations requires by the switch of control dissolving tank bleeder valve group.
Work of the present utility model and technical process are as follows:
Control device (PLC or DCS) by control program automatically open water intaking valve, drop into steam(-)coil, the full liquid level of the water level to 30% of control dissolving tank, temperature to 60 ℃, turn on agitator, dissolving pump;
2. urea groove tank car in bulk transportation of urea particle is to on-the-spot, the discharging opening of urea groove tank car in bulk is connected with the charging aperture of charging surge tank, the air inlet of urea groove tank car in bulk is connected with the gas outlet of compressed air reservoir, open urea groove tank car in bulk fluidisation intake valve, when the tank internal pressure of urea groove tank car in bulk reaches 0.5MPa, open urea groove tank car in bulk bleeder valve, urea granules utilizes compressed-air actuated power, by urea groove tank car in bulk hopper, form the close phase convey materials of clearance-type hitching post under the acting in conjunction of charging surge tank, urea enters dissolving tank by the tremie pipe of charging surge tank;
3. same timed unit (PLC or DCS) is by urea liquid density and the dissolving tank liquid level timely adjustment inflow of mensuration, when meeting the demands, dissolving tank liquid level and urea liquid density opens dissolving tank bleeder valve group, to holding vessel transport urea solution, and the dissolving tank liquid level is closed dissolving tank bleeder valve group when dropping to 30% full liquid level;
4. said process carries out continuously, until car urea granules conveying is complete;
5. after car urea in bulk all is prepared into urea liquid, opens drainage pump the dissolving circulation pipeline is carried out backwash, backwashing water enters the dissolving tank reuse; The spray pipe network of opening simultaneously the charging surge tank washes the charging surge tank;
6. next car urea groove in bulk tank car repeats above-mentioned steps 1-5 after on-the-spot;
7. when urea liquid circulation-supplied pump head of a household's time stops using, use counter-flushing pipeline that circulation line is carried out backwash, make urea concentration in the circulation pipe to crystallization concentration.
The utility model adopts urea groove tank car in bulk transportation of urea particle and serves the storehouse and possess the device of the continuous production urea liquid that the urea liquid pipeline back-flushing washes by gap inflation pot type pneumatic transporting, the urea granules moisture absorption that can solve this device hardens and stops up the urea granules tremie pipe, solve urea liquid pipeline Crystallization Plugging, realize the continuously automatically operation of urea liquid preparation, greatly improved automaticity and the reliability of the operation of operating efficiency and system.
Claims (7)
1. the adjustable urea solution preparing device of the concentration in storehouse on the employing strength, it is characterized in that comprising urea groove tank car in bulk, air compressor, the compressed air cooling driers, precision filter of compressed air, compressed air reservoir, adjusting control valve, the charging surge tank, dissolving tank, the dissolving pump, dissolving tank water inlet electric control valve, the steam pipe coil heater, solution strainer, agitator, the circulation-supplied pump, constant-voltage equipment, the solution holding vessel, drain tank, drainage pump, counter-flushing pipeline, densitometer, liquid level gauge, control device and bleeder valve group, air compressor connects the compressed air cooling driers, the compressed air cooling driers connects precision filter of compressed air, precision filter of compressed air connects compressed air reservoir, compressed air reservoir connects adjusting control valve, adjusting control valve connects urea groove tank car in bulk, urea groove tank car in bulk connects the charging surge tank, charging surge tank feed opening connects the dissolving tank charging aperture, the dissolving tank water inlet connects dissolving tank water inlet electric control valve, the dissolving tank discharging opening connects solution strainer, solution strainer connects the dissolving pump inlet, the dissolving pump discharge connects the bleeder valve group, the bleeder valve group connects the import of solution holding vessel, the outlet of solution holding vessel connects the circulation-supplied pump inlet, and the circulation-supplied pump discharge connects constant-voltage equipment; The drain tank outlet connects the drainage pump import, and the drainage pump outlet connects counter-flushing pipeline, and counter-flushing pipeline is connected with charging surge tank, dissolving pump discharge, circulation-supplied pump discharge respectively.
2. the adjustable urea solution preparing device of concentration in storehouse on the employing strength according to claim 1, it is characterized in that being provided with spray pipe network and the exhaust apparatus that gathers dust in the described charging surge tank, the exhaust apparatus that gathers dust is arranged on the spray pipe network top, the charging surge tank is connected with the exhaust apparatus that gathers dust, and the exhaust apparatus that gathers dust communicates with atmosphere.
3. the adjustable urea solution preparing device of concentration in storehouse on the employing strength according to claim 1 is characterized in that being equipped with liquid level gauge and thermometer on described dissolving tank and the solution holding vessel.
4. the adjustable urea solution preparing device of concentration in storehouse on the employing strength according to claim 1 is characterized in that described control device connects respectively liquid level gauge, densitometer and dissolving tank water inlet electric control valve.
5. the adjustable urea solution preparing device of concentration in storehouse on the employing strength according to claim 1 is characterized in that the inclination angle of the inner hopper of described urea groove tank car in bulk is 28 degree, and material bin adopts many chamber structures.
6. the adjustable urea solution preparing device of concentration in storehouse on the employing strength according to claim 1 is characterized in that the import of described steam pipe coil heater links to each other with vapour source, and the outlet of steam pipe coil heater connects the drain tank import.
7. the adjustable urea solution preparing device of concentration in storehouse on the employing strength according to claim 2 is characterized in that described spray pipe network is connected with counter-flushing pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220285043.5U CN202666710U (en) | 2012-06-18 | 2012-06-18 | Concentration-adjustable urea solution preparation device utilizing pneumatic energy to load |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220285043.5U CN202666710U (en) | 2012-06-18 | 2012-06-18 | Concentration-adjustable urea solution preparation device utilizing pneumatic energy to load |
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| CN202666710U true CN202666710U (en) | 2013-01-16 |
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| CN201220285043.5U Expired - Fee Related CN202666710U (en) | 2012-06-18 | 2012-06-18 | Concentration-adjustable urea solution preparation device utilizing pneumatic energy to load |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113262655A (en) * | 2021-05-17 | 2021-08-17 | 华融化学股份有限公司 | Salt dissolving device capable of continuously providing crude salt water with stable concentration |
| CN113401921A (en) * | 2021-05-17 | 2021-09-17 | 许昌龙岗发电有限责任公司 | Urea hydrolysis ammonia production system and control method thereof |
| 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 |
| CN114870625A (en) * | 2022-03-04 | 2022-08-09 | 华电电力科学研究院有限公司 | Urea solution preparation system and method for urea ammonia production device |
-
2012
- 2012-06-18 CN CN201220285043.5U patent/CN202666710U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113262655A (en) * | 2021-05-17 | 2021-08-17 | 华融化学股份有限公司 | Salt dissolving device capable of continuously providing crude salt water with stable concentration |
| CN113401921A (en) * | 2021-05-17 | 2021-09-17 | 许昌龙岗发电有限责任公司 | Urea hydrolysis ammonia production system and control method thereof |
| CN113401921B (en) * | 2021-05-17 | 2024-03-22 | 许昌龙岗发电有限责任公司 | Urea hydrolysis ammonia production system and control method thereof |
| CN114870625A (en) * | 2022-03-04 | 2022-08-09 | 华电电力科学研究院有限公司 | Urea solution preparation system and method for urea ammonia production device |
| 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 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20180618 |
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| CF01 | Termination of patent right due to non-payment of annual fee |