CN210584452U - Full-automatic urea denitrification facility - Google Patents
Full-automatic urea denitrification facility Download PDFInfo
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- CN210584452U CN210584452U CN201920863765.6U CN201920863765U CN210584452U CN 210584452 U CN210584452 U CN 210584452U CN 201920863765 U CN201920863765 U CN 201920863765U CN 210584452 U CN210584452 U CN 210584452U
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Abstract
The utility model discloses a full-automatic urea denitrification facility, constitute the device through gathering the cigarette in real time including six major function module such as storage system, join in marriage liquid system, buffer memory stock solution system, injection system, self-cleaning system and control systemThe concentration of nitrogen oxides in the gas automatically adjusts the drug delivery system. NOxThe more the liquid medicine is generated, the more the amount of the liquid medicine to be ejected is, and the less the liquid medicine is generated, the less the amount of the liquid medicine to be ejected is. The system ensures the stability of the emission index to the maximum extent. It has the advantages that: the volume is small and the capacity is large; the liquid is fully automatically prepared without being attended; closed-loop control, discharge is more stable, and energy is saved. The intelligent control method is suitable for SNCR systems required in China, and achieves intelligentization of control strategies.
Description
Technical Field
The utility model relates to a flue gas denitration device particularly, is a full-automatic urea denitration device who is applied to boiler SNCR (Selective Non-Catalytic Reduction) system.
Background
In recent years, automatic control systems are more and more widely applied to denitration systems, such as the denitration systems of circulating fluidized bed power plants, which adopt SNCR to remove NOXIn the technology, diluted urea solution is sprayed into the corresponding areas of the upper part of a boiler side hearth, a separator and a flue and NO in smokeXReduction reaction to generate N2And H2And O, thereby achieving the aim of denitration.
However, at home and abroad, the research on the SNCR denitration systems of various systems such as coal boilers, incinerators, cement kilns and the like mainly focuses on the research on the generation mechanism and process of nitrogen oxides and the design and simulation of the control method of the SNCR denitration system, but various complex and variable factors in actual operation are not considered in the design, and the problem that whether the existing DCS supports advanced algorithms or not is not considered, so that the designed control method is not suitable for field implementation. NO of simultaneous SNCR denitration systemXThe characteristics of large delay, large inertia, multi-factor coupling and the like in the removing process enable the conventional control method to be incapable of meeting the control requirements, and some advanced controls are difficult to apply to field practice due to the fact that accurate mathematical models cannot be established, so that the automatic control of the SNCR denitration system is difficult to achieve. The utility model discloses to the characteristics and the production actual conditions of SNCR deNOx systems controlled object, design out an easy SNCR deNOx systems full automatic control system who is applied to the production scene.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem that traditional SNCR deNOx systems is difficult to realize automatic control, the utility model provides a full-automatic urea denitrification facility.
The device adopts a urea dissolving tank and a urea diluting tank to constitute, dissolves urea for 30% urea solution in dissolving tank, carries 30% urea solution to diluting the jar through the tubing pump, records the delivery capacity by the electromagnetic flowmeter, adds water in to diluting the jar, adds the water yield by the electromagnetic flowmeter record, and solution concentration dilutes to 6% ~ 10% (specific numerical value is set for according to the factory's demand). The diluted solution is respectively conveyed to a boiler by a magnetic vortex pump, each boiler corresponds to one pump, each pump supplies 4 spray guns, the whole plant is provided with one pump, every two spray guns share one atomizing fan, each pump is provided with one safety relief valve, each furnace is provided with one flowmeter to measure the injection amount of urea, and each spray gun is provided with one side pressure device.
The device automatically adjusts the drug delivery system by acquiring the concentration of nitrogen oxides in the smoke in real time. NOxThe more the liquid medicine is generated, the more the amount of the liquid medicine to be ejected is, and the less the liquid medicine is generated, the less the amount of the liquid medicine to be ejected is. The system ensures the stability of the emission index to the maximum extent. It has the advantages that: 1. the volume is small and the capacity is large; 2. the liquid is fully automatically prepared without being attended; 3. closed-loop control, discharge is more stable, and energy is saved. The intelligent control method is suitable for SNCR systems required in China, and achieves intelligentization of control strategies.
The full-automatic urea denitration device comprises six functional modules, namely a storage system, a liquid preparation system, a cache and liquid storage system, an injection system, an automatic cleaning system, a control system and the like. The specific functions are described as follows:
1) material storage system
The storage system changes the traditional design method. In the traditional method, the liquid medicine is prepared and stored in a liquid storage tank. And the storage system is designed according to the concentration of 10% of liquid medicine, and the volume of the storage system is reduced by 90% compared with that of the liquid storage system.
2) Liquid preparation system
The water distribution, the material preparation, the stirring and the liquid discharge are fully automatically completed. The control system can accurately control the liquid preparation system according to the using condition of the liquid medicine, add water, feed and stir, and supplement the liquid medicine in time.
3) Buffer storage system
The buffer liquid storage system is used for storing prepared liquid medicine and supplying the liquid medicine to the system in real time. And simultaneously, the using condition of the liquid medicine is analyzed and fed back to the control system.
The device adopts the design of combining three tanks of liquid preparation, liquid storage and cleaning, and the whole system has beautiful appearance, compact volume and stable operation.
4) Injection system
The reaction temperature of urea and nitrogen oxide is about 950 ℃, the temperature is very high, even if the spray gun is made of high-temperature resistant materials, if the spray gun stops spraying liquid and is still continuously inserted into a hearth, the spray gun is easy to damage.
The utility model discloses the device adopts automatic flexible spray gun can be flexible by control system remote control. The furnace chamber is inserted when liquid spraying is needed, and the furnace chamber is withdrawn when liquid spraying is stopped. The spray gun has a blockage detection function, and when the blockage is detected, the spray gun can automatically withdraw from the hearth. The safety of the spray gun is ensured to the maximum extent by the automatic telescopic spray gun.
5) Automatic cleaning system
After the spray gun is stopped, residual liquid medicine is left in the gun body, and crystal bodies can be generated after the liquid medicine is evaporated to block the spray gun. The automatic cleaning system cleans the spray gun before the spray gun exits the hearth after the spray gun is stopped, so that residual liquid medicine in the spray gun is removed, and the blockage of the gun head is avoided.
6) Control system
The control system is the 'brain' of the whole marketing system, and coordinates and controls the operation of each system. The system collects parameters such as hearth temperature, air blowing frequency, oxygen content, nitrogen oxide at the outlet of the boiler and the like, and adopts a prediction and model control algorithm to control the spraying amount in a closed loop manner, so that the discharge of NOx at the outlet is stabilized within the range of environmental protection requirements. Accurate control of NOxThe emission, the urea consumption and the labor intensity are reduced.
The utility model adopts the technical scheme as follows: the utility model provides a full-automatic urea denitrification facility, includes material loading spiral tank 1, stirring spiral storage tank 2, hydrojet pump 3, agitator tank adds medicine entry 4, agitator motor 5, agitator tank water inlet 6, agitator tank 7, clear water solenoid valve 8, flowing back motorised valve 9, liquid medicine liquid storage pot 10, embedded clear water tank 11, liquid medicine clear water three-way valve 12, liquid storage pot liquid medicine export 13, clear water tank export 14, urea spray gun insulation cover 15, urea spray gun 16, flow state monitoring devices 17 and electric putter 18.
The bottom of the feeding spiral tank 1 is communicated with the top of the stirring spiral storage tank 2 through a feeding spiral, and a stirring spiral is arranged in the stirring spiral storage tank 2; the bottom of the stirring spiral storage tank 2 is communicated with a stirring tank dosing inlet 4 of a stirring tank 7 through a feeding barrel; a stirring tank water adding inlet 6 is formed in one side of the top of the stirring tank 7; the stirring motor 5 is arranged in the middle of the top of the stirring tank 7, and the stirring motor 5 is connected with the stirring blades in the stirring tank 7; the stirring tank 7 is arranged on the liquid medicine storage tank 10, the embedded clean water tank 11 is embedded into one side of the liquid medicine storage tank 10, and the embedded clean water tank 11, the liquid medicine storage tank 10 and the stirring tank 7 work independently, but the three are in an integrated structure.
A clear water electromagnetic valve 8 is arranged outside the water inlet 6 of the stirring tank, and a liquid discharge electric valve 9 is arranged between the liquid medicine storage tank 10 and the stirring tank 7.
A liquid medicine outlet 13 of the liquid medicine storage tank is arranged at the bottom of the liquid medicine storage tank 10, and a clear water tank outlet 14 is arranged at the bottom of the embedded clear water tank 11; a liquid medicine outlet 13 of the liquid storage tank and an outlet 14 of the clean water tank are connected with a liquid spraying pump 3 through a liquid medicine clean water three-way valve 12, and the liquid spraying pump 3 is connected with a urea spray gun 16; the urea spray gun 16 is sleeved in the urea spray gun heat insulation sleeve 15, the electric push rod 18 is arranged on one side of the urea spray gun 16, the urea spray gun 16 is driven to exceed the urea spray gun heat insulation sleeve 15 through the electric push rod 18, and the end part of the urea spray gun 16 is provided with the flow state monitoring device 17.
The beneficial effects of the utility model are that, through the nitrogen oxide concentration in the real-time collection flue gas, automatically regulated drug delivery system. NOxThe more the liquid medicine is generated, the more the amount of the liquid medicine to be ejected is, and the less the liquid medicine is generated, the less the amount of the liquid medicine to be ejected is. The system ensures the stability of the emission index to the maximum extent. The utility model discloses to the spray gun block up, lack material, lack liquid etc. and taken the multiple state monitoring, guaranteed the operation of the maximum safety and stability of equipment. The device adapts to SNCR systems required in China, and can be widely applied to flue gas denitration parts of various systems such as coal-fired boilers, incinerators and cement kilnsAnd (6) processing.
Drawings
FIG. 1 is a perspective view of the integrated device of the present invention;
fig. 2 is a front view of the present invention;
FIG. 3 is a perspective view of the present invention showing the three tanks (agitator tank, chemical liquid storage tank, clean water tank) combined together;
FIG. 4 is a perspective view of the three-way valve for liquid medicine and clear water of the present invention;
figure 5 is a perspective view of the electric valve for drainage;
figure 6 is a perspective view of the automatic spray gun of the present invention.
In the figure: 1. the device comprises a feeding spiral tank, 2, a stirring spiral storage tank, 3, a liquid spraying pump, 4, a stirring tank dosing inlet, 5, a stirring motor, 6, a stirring tank water adding inlet, 7, a stirring tank, 8, a clear water electromagnetic valve, 9, a liquid discharge electric valve, 10, a liquid medicine storage tank, 11, an embedded clear water tank, 12, a liquid medicine clear water three-way valve, 13, a liquid medicine outlet of the liquid storage tank, 14, a clear water tank outlet, 15, a urea spray gun heat insulation sleeve, 16, a urea spray gun, 17, a flow state monitoring device, 18 and an electric push rod.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
The utility model discloses specific work flow is as follows: urea transports urea to stirring spiral storage tank 2 through the material loading spiral in material loading spiral tank 1 and stores, opens clear water solenoid valve 8 when needing to join in marriage the urea solution to begin the water injection. When the water level reaches 1/2 of the stirring tank 7, urea particles are added through the stirring screw in the stirring screw storage tank 2, the stirring motor 5 is started, and the water injection is stopped when the stirring water level reaches the upper water level. The adding amount of the urea is controlled by controlling the running time of the stirring screws, the running times of the stirring screws of the solutions with different concentrations are different, and the stirring motor 5 stops running when stirring is carried out until the urea is completely dissolved. The prepared liquid medicine is discharged to the liquid medicine storage tank 10 through the liquid discharge electric valve 9, and then the liquid medicine is controlled to flow to the liquid spraying pump 3 through opening the liquid medicine clear water three-way valve 12, and then the liquid medicine is sprayed to the urea spray gun through the liquid spraying pump 3.
As shown in fig. 3, the three-in-one design of the present invention is described as follows: the design is a design idea of integrating the stirring tank 7, the liquid medicine storage tank 10 and the embedded clean water tank 11 into a whole, has the advantages of small volume, capability of discharging liquid medicine without a power system depending on self weight and the like, and the embedded clean water tank 11 has the characteristics of more material saving and more tidy appearance.
As shown in fig. 4-6, the three-way valve and the spray gun of the present invention are specifically described as follows: the full-automatic urea spray gun is driven by the electric push rod 18 to enable the urea spray gun 16 to exceed the urea spray gun protective sleeve 15 during operation, so that a better atomization effect and a better spray range are achieved. When the liquid medicine does not need to be sprayed, the urea spray gun 16 is retracted to the urea spray gun insulation sleeve by the driving of the electric push rod to be far away from the high-temperature area, so that the spray head is protected.
The utility model discloses flow state monitoring devices 17 has still been designed at the liquid medicine entry of urea spray gun, the judgement urea spray gun that can be better blocks up the condition.
Claims (1)
1. The utility model provides a full-automatic urea denitrification facility which characterized in that: the device comprises a feeding spiral tank (1), a stirring spiral storage tank (2), a liquid spraying pump (3), a stirring tank medicine feeding inlet (4), a stirring motor (5), a stirring tank water feeding inlet (6), a stirring tank (7), a clear water electromagnetic valve (8), a liquid discharging electric valve (9), a liquid medicine storage tank (10), an embedded clear water tank (11), a liquid medicine clear water three-way valve (12), a liquid medicine outlet (13) of the liquid storage tank, a clear water tank outlet (14), a urea spray gun heat insulation sleeve (15), a urea spray gun (16), a flow state monitoring device (17) and an electric push rod (18);
the bottom of the feeding spiral tank (1) is communicated with the top of the stirring spiral storage tank (2) through a feeding spiral, and a stirring spiral is arranged in the stirring spiral storage tank (2); the bottom of the stirring spiral storage tank (2) is communicated with a stirring tank dosing inlet (4) of a stirring tank (7) through a feeding barrel; a water inlet (6) of the stirring tank is arranged on one side of the top of the stirring tank (7); the stirring motor (5) is arranged in the middle of the top of the stirring tank (7), and the stirring motor (5) is connected with the stirring blades in the stirring tank (7); the stirring tank (7) is arranged on the liquid medicine storage tank (10), the embedded clean water tank (11) is embedded into one side of the liquid medicine storage tank (10), and the embedded clean water tank (11), the liquid medicine storage tank (10) and the stirring tank (7) work independently, but are of an integrated structure;
a clear water electromagnetic valve (8) is arranged outside the water inlet (6) of the stirring tank, and a liquid discharge electric valve (9) is arranged between the liquid medicine storage tank (10) and the stirring tank (7);
a liquid medicine outlet (13) of the liquid medicine storage tank is arranged at the bottom of the liquid medicine storage tank (10), and a clear water tank outlet (14) is arranged at the bottom of the embedded clear water tank (11); a liquid medicine outlet (13) of the liquid storage tank and an outlet (14) of the clean water tank are connected with a liquid spraying pump (3) through a liquid medicine and clean water three-way valve (12), and the liquid spraying pump (3) is connected with a urea spray gun (16); urea spray gun (16) cover is in urea spray gun insulation cover (15), and electric putter (18) set up in one side of urea spray gun (16), surpasss urea spray gun insulation cover (15) through electric putter (18) drive urea spray gun (16), and the tip of urea spray gun (16) is equipped with flow state monitoring devices (17).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920863765.6U CN210584452U (en) | 2019-06-11 | 2019-06-11 | Full-automatic urea denitrification facility |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920863765.6U CN210584452U (en) | 2019-06-11 | 2019-06-11 | Full-automatic urea denitrification facility |
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| CN210584452U true CN210584452U (en) | 2020-05-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110180368A (en) * | 2019-06-11 | 2019-08-30 | 内蒙古弘睿节能科技有限公司 | A kind of full-automatic urea denitrification apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110180368A (en) * | 2019-06-11 | 2019-08-30 | 内蒙古弘睿节能科技有限公司 | A kind of full-automatic urea denitrification apparatus |
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