CN204395760U - The SNCR denitration device of a kind of pair of concentration urea liquid - Google Patents
The SNCR denitration device of a kind of pair of concentration urea liquid Download PDFInfo
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- CN204395760U CN204395760U CN201520012892.7U CN201520012892U CN204395760U CN 204395760 U CN204395760 U CN 204395760U CN 201520012892 U CN201520012892 U CN 201520012892U CN 204395760 U CN204395760 U CN 204395760U
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Abstract
The utility model discloses the SNCR denitration device of a kind of pair of concentration urea liquid, it comprises urea liquid and stores and preparation facilities (1), control module (2) prepared by urea, on-line dilution module (3), metering distribution module (4) and reducing agent jet module (5) and urea solution jet control device (6), wherein, described urea liquid stores and is connected with the information input terminal that control module (2) prepared by urea with the information output of preparation facilities (1), the control end that control module (2) prepared by this urea stores with urea liquid and is connected with preparation facilities (1).Urea liquid in two urea fluid reservoirs can be adjusted to two kinds of different concentration by the utility model easily, its concentration value determines according to designing and calculating and on-site parameters experiment, so, adjustable range reduces, precision increases, and denitrating system changes fast reaction to boiler working condition, particularly at the lower temperature in the downstream of window, increase sharply pure urea supply amount, ensures denitration efficiency.
Description
Technical field
The utility model relates to the producing unit field of urea, be specifically related to the SNCR denitration device of a kind of pair of concentration urea liquid.
Background technology
The preparation of SNCR urea liquid and stocking system, generally should comprise: dry urea storage storehouse, urea liquid preparation stocking system, on-line dilution system, back pressure control and spray metering and distributor.Its function is that urea liquid is delivered to spraying system according to the NOx concentration of boiler export with a certain amount of.
System configuration urea liquid dosing chamber and two urea liquid storage tanks, dosing chamber is for configuring certain density urea liquid, and urea liquid storage tank is used for the urea liquid that store ingredients pond prepares, and solution is realized by batching delivery pump from dosing chamber to storage tank.Solution in storage tank arrives stokehold spraying system after pump pressurization and on-line dilution.
When the NOx concentration change of boiler load or furnace outlet, the urea amount sending into burner hearth also should change thereupon, and this changes causing the flow sending into injector.If the changes in flow rate of injector is too large, will atomised jet effect be had influence on, thus affect denitration rate and ammonia remnants.Certain density urea liquid adds a road dilution water and is mixed into transfer pipeline, carry out dilute solution after exporting from storage tank, regulates final urea concentration to meet the requirement of boiler different load by monitoring on-line dilution discharge.The dilution water pump that is conducted through of dilution water realizes.
Due to middle-size and small-size thermo-power station boiler, the particularly Industrial Boiler of simple heat supply, in actual motion, load variations is much larger than the boiler of large power plant, the temperature window of SNCR is an extremely narrow scope, and SNCR technology is extremely responsive for temperature conditions, NOx is not having under catalytic condition, when reaction temperature is lower than less than 750 degree, reduction reaction slows up, it is even zero that denitration efficiency can sharply decline, and on-line dilution device can only adjust within the specific limits, scope is wide, can affect regulating effect.
Utility model content
The utility model object is to provide the SNCR denitration device of a kind of pair of concentration urea liquid, and it can solve problem existing in background technology effectively.
In order to solve problem existing in background technology, it comprises urea liquid and stores and preparation facilities 1, control module 2 prepared by urea, on-line dilution module 3, metering distribution module 4 and reducing agent jet module 5 and urea solution jet control device 6, wherein, described urea liquid stores and is connected with the information input terminal that control module 2 prepared by urea with the information output of preparation facilities 1, and the control end that control module 2 prepared by this urea stores with urea liquid and is connected with preparation facilities 1; Described on-line dilution module 3, metering distribution module 4 is connected with the information input terminal of urea solution jet control device 6 respectively with the information output of reducing agent jet module 5, the control end of this urea solution jet control device 6 respectively with on-line dilution module 3, metering distribution module 4 is connected with reducing agent jet module 5, described urea solution jet control device 6 is also connected with the information output of NOx concentration checkout gear with boiler load checkout gear respectively, and described urea liquid stores and is connected with on-line dilution module 3 with preparation facilities 1.
Described urea liquid stores and preparation facilities 1 comprises urea tank and gating system 11, this urea tank and gating system 11 is connected with urea dissolving tank 12 by driving, the side of described urea dissolving tank 12 is provided with the steam-heating pipe 121 and the first desalination water pipe 122 that are connected with its inside, described urea dissolving tank 12 is connected with the second urea liquid holding vessel 15 with the first urea liquid holding vessel 14 respectively through urea liquid filter 13, the first described urea liquid holding vessel 14 and the second urea liquid holding vessel 15 carry out the circulation of urea liquid back pressure respectively by urea liquid lifting device 16.
Described on-line dilution module 3 comprises the first heating tank body 31 and the second heating tank body 32, wherein, first heating tank body 31 is connected with the first urea liquid holding vessel 14 by conduit, second heating tank body 32 is connected with the second urea liquid holding vessel 15 by conduit, the first described heating tank body 31 is connected with urea liquid blending tank 33 through measuring equipment respectively by conduit with the second heating tank body 32, the side of this urea liquid blending tank 33 is connected with the second desalination water pipe 34 by demineralized water pressure lift device 38, described urea liquid blending tank 33 is connected with the 4th urea liquid holding vessel 36 with the 3rd urea liquid holding vessel 35 respectively by conduit, 3rd urea liquid holding vessel 35 is connected with online flow of urea amount control device 37 by measuring equipment with the 4th urea liquid holding vessel 36.
Owing to have employed above technical scheme, the utility model has following beneficial effect: by storing at urea liquid and arranging two independently the first urea liquid holding vessel and the second urea liquid holding vessels in preparation facilities, make it easily the urea liquid in two urea fluid reservoirs can be adjusted to two kinds of different concentration, its concentration value determines according to designing and calculating and on-site parameters experiment, so, adjustable range reduces, precision increases, denitrating system changes fast reaction to boiler working condition, particularly at the lower temperature in the downstream of window, increase sharply pure urea supply amount, ensure denitration efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model, below in conjunction with accompanying drawing, embodiment is briefly described.
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment being clearly and completely described.
Embodiment 1
Referring to Fig. 1, the SNCR denitration device of a kind of pair of concentration urea liquid comprises urea liquid and stores and preparation facilities 1, control module 2 prepared by urea, on-line dilution module 3, metering distribution module 4 and reducing agent jet module 5 and urea solution jet control device 6, wherein, described urea liquid stores and is connected with the information input terminal that control module 2 prepared by urea with the information output of preparation facilities 1, and the control end that control module 2 prepared by this urea stores with urea liquid and is connected with preparation facilities 1; Described on-line dilution module 3, metering distribution module 4 is connected with the information input terminal of urea solution jet control device 6 respectively with the information output of reducing agent jet module 5, the control end of this urea solution jet control device 6 respectively with on-line dilution module 3, metering distribution module 4 is connected with reducing agent jet module 5, described urea solution jet control device 6 is also connected with the information output of NOx concentration checkout gear with boiler load checkout gear respectively, and described urea liquid stores and is connected with on-line dilution module 3 with preparation facilities 1.
Described urea liquid stores and preparation facilities 1 comprises urea tank and gating system 11, this urea tank and gating system 11 is connected with urea dissolving tank 12 by driving, the side of described urea dissolving tank 12 is provided with the steam-heating pipe 121 and the first desalination water pipe 122 that are connected with its inside, described urea dissolving tank 12 is connected with the second urea liquid holding vessel 15 with the first urea liquid holding vessel 14 respectively through urea liquid filter 13, the first described urea liquid holding vessel 14 and the second urea liquid holding vessel 15 carry out the circulation of urea liquid back pressure respectively by urea liquid lifting device 16.
Described on-line dilution module 3 comprises the first heating tank body 31 and the second heating tank body 32, wherein, first heating tank body 31 is connected with the first urea liquid holding vessel 14 by conduit, second heating tank body 32 is connected with the second urea liquid holding vessel 15 by conduit, the first described heating tank body 31 is connected with urea liquid blending tank 33 through measuring equipment respectively by conduit with the second heating tank body 32, the side of this urea liquid blending tank 33 is connected with the second desalination water pipe 34 by demineralized water pressure lift device 38, described urea liquid blending tank 33 is connected with the 4th urea liquid holding vessel 36 with the 3rd urea liquid holding vessel 35 respectively by conduit, 3rd urea liquid holding vessel 35 is connected with online flow of urea amount control device 37 by measuring equipment with the 4th urea liquid holding vessel 36.
Embodiment 2
First in urea dissolving tank 12,30% urea liquid or 50% urea liquid is configured respectively, herein in no particular order, as long as 30% urea liquid and 50% urea liquid to be injected into respectively two separate the first urea liquid holding vessel 14 and the second urea liquid holding vessels 15, in order to save the operating time, had better first configure 50% urea liquid, 30% urea liquid is injected in the first urea liquid holding vessel 14 in the present embodiment, 50% urea liquid is injected in the second urea liquid holding vessel 15, this is first order dilution configuration, differ greatly between the urea liquid of therefore two kinds of variable concentrations, after carrying out the circulation of urea liquid back pressure by urea liquid lifting device 16, 30% urea liquid in first urea liquid holding vessel 14 is injected in the first heating tank body 31 by conduit, 50% urea liquid in second urea liquid holding vessel 15 is injected in the second heating tank body 32 by conduit, wherein, 30% urea liquid heating-up temperature is 750-830 DEG C, 50% urea liquid heating-up temperature is 830-1000 DEG C, after heating, urea liquids different for two kinds of concentration is entered in urea liquid blending tank 33 and mix, then in urea liquid blending tank 33, demineralized water is added by demineralized water pressure lift device 38, dilution configures 7% urea liquid and 14% urea liquid again, the urea liquid of two kinds of variable concentrations is finally mixed into the urea liquid of required concentration by last unlatching the 3rd urea liquid holding vessel 35 and the 4th urea liquid holding vessel 36 simultaneously by flow of urea amount control device 37, because the disparity range between two kinds of urea liquids is less, be only about 7%, therefore adjustable range reduces, precision increases, denitrating system changes fast reaction to boiler working condition, particularly at the lower temperature in the downstream of window, increase sharply pure urea supply amount, ensure denitration efficiency.
Owing to have employed above technical scheme, this detailed description of the invention has following beneficial effect: by storing at urea liquid and arranging two independently the first urea liquid holding vessel and the second urea liquid holding vessels in preparation facilities, make it easily the urea liquid in two urea fluid reservoirs can be adjusted to two kinds of different concentration, its concentration value determines according to designing and calculating and on-site parameters experiment, so, adjustable range reduces, precision increases, denitrating system changes fast reaction to boiler working condition, particularly at the lower temperature in the downstream of window, increase sharply pure urea supply amount, ensure denitration efficiency.
Last it is noted that above embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (3)
1. the SNCR denitration device of a two concentration urea liquid, it is characterized in that it comprises urea liquid and stores and preparation facilities (1), control module (2) prepared by urea, on-line dilution module (3), metering distribution module (4) and reducing agent jet module (5) and urea solution jet control device (6), wherein, described urea liquid stores and is connected with the information input terminal that control module (2) prepared by urea with the information output of preparation facilities (1), the control end that control module (2) prepared by this urea stores with urea liquid and is connected with preparation facilities (1), described on-line dilution module (3), metering distribution module (4) is connected with the information input terminal of urea solution jet control device (6) respectively with the information output of reducing agent jet module (5), the control end of this urea solution jet control device (6) respectively with on-line dilution module (3), metering distribution module (4) is connected with reducing agent jet module (5), described urea solution jet control device (6) is also connected with the information output of NOx concentration checkout gear with boiler load checkout gear respectively, described urea liquid stores and is connected with on-line dilution module (3) with preparation facilities (1).
2. the SNCR denitration device of a kind of pair of concentration urea liquid according to claim 1, it is characterized in that described urea liquid stores and preparation facilities (1) comprises urea tank and gating system (11), this urea tank and gating system (11) is connected with urea dissolving tank (12) by driving, the side of described urea dissolving tank (12) is provided with the steam-heating pipe (121) and the first desalination water pipe (122) that are connected with its inside, described urea dissolving tank (12) is connected with the second urea liquid holding vessel (15) with the first urea liquid holding vessel (14) respectively through urea liquid filter (13), the first described urea liquid holding vessel (14) and the second urea liquid holding vessel (15) carry out the circulation of urea liquid back pressure respectively by urea liquid lifting device (16).
3. the SNCR denitration device of a kind of pair of concentration urea liquid according to claim 1, it is characterized in that described on-line dilution module (3) comprises the first heating tank body (31) and the second heating tank body (32), wherein, first heating tank body (31) is connected with the first urea liquid holding vessel (14) by conduit, second heating tank body (32) is connected with the second urea liquid holding vessel (15) by conduit, the first described heating tank body (31) is connected with urea liquid blending tank (33) through measuring equipment respectively by conduit with the second heating tank body (32), the side of this urea liquid blending tank (33) is connected with the second desalination water pipe (34) by demineralized water pressure lift device (38), described urea liquid blending tank (33) is connected with the 4th urea liquid holding vessel (36) with the 3rd urea liquid holding vessel (35) respectively by conduit, 3rd urea liquid holding vessel (35) is connected with online flow of urea amount control device (37) by measuring equipment with the 4th urea liquid holding vessel (36).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520012892.7U CN204395760U (en) | 2015-01-07 | 2015-01-07 | The SNCR denitration device of a kind of pair of concentration urea liquid |
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| CN201520012892.7U CN204395760U (en) | 2015-01-07 | 2015-01-07 | The SNCR denitration device of a kind of pair of concentration urea liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105148756A (en) * | 2015-09-30 | 2015-12-16 | 中国船舶重工集团公司第七一一研究所 | Solution preparation device |
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- 2015-01-07 CN CN201520012892.7U patent/CN204395760U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105148756A (en) * | 2015-09-30 | 2015-12-16 | 中国船舶重工集团公司第七一一研究所 | Solution preparation device |
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Address after: 523000, B5, building 2A, art exhibition center, 29 Art Exhibition Road, Nancheng District, Guangdong, Dongguan Patentee after: Dongguan Hongshulin Environmental Protection Technology Ltd China Address before: Sheng and Sports Road Nancheng District 523000 in Guangdong province Dongguan City Hongxi center 2 No. A1207 Patentee before: Dongguan Hongshulin Environmental Protection Technology Ltd China |
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Granted publication date: 20150617 Termination date: 20200107 |
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| CF01 | Termination of patent right due to non-payment of annual fee |