CN202729821U - Electric pyrolytic urea solution device and electric pyrolytic urea solution ammonia generating device thereof - Google Patents
Electric pyrolytic urea solution device and electric pyrolytic urea solution ammonia generating device thereof Download PDFInfo
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- CN202729821U CN202729821U CN 201220066410 CN201220066410U CN202729821U CN 202729821 U CN202729821 U CN 202729821U CN 201220066410 CN201220066410 CN 201220066410 CN 201220066410 U CN201220066410 U CN 201220066410U CN 202729821 U CN202729821 U CN 202729821U
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- urea
- urea soln
- soln
- ammonia
- electric heating
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Abstract
The utility model discloses an electric pyrolytic urea solution device and an electric pyrolytic urea solution ammonia generating device thereof. The device comprises a urea solution dissolving system, a urea solution storing system, a urea solution pyrolyzing system and an automatic control system, wherein the urea solution dissolving system comprises a urea particle storing tank, a urea weighing feeder and a urea dissolving tank which are sequentially connected with each other; the urea weighing feeder is connected with the automatic control system; the urea solution pyrolyzing system comprises an electronic urea solution flowmeter, an electronic pyrolytic urea solution device and an ammonia buffer tank which are controlled by the automatic control system and are sequentially connected with each other, and an electronic reducing gas flowmeter controlled by the automatic control system; the automatic control system comprises a flue NOx analyzer and a programmable logic control device; the flue NOx analyzer is respectively connected with a selective catalytic reduction (SCR) denitration device and the programmable logic control device; and the urea solution storing system is arranged between the urea solution dissolving system and the a urea solution pyrolyzing system. The electric pyrolytic urea solution device adopts electricity to pyrolyze and control, and has the characteristics of short response time, high efficiency and the like; and in addition, the electricity is taken as a heat source, so that the device has the characteristics of small secondary pollution, high economy, efficiency and simplicity in control.
Description
Technical field
The utility model belongs to flue gas the selective catalytic denitrification process device, is specifically related to a kind of electric heating solution urea soln device and electric heating solution urea soln ammonia-preparing device thereof.
Background technology
China oxynitride (NO
x) quantity discharged is always high, seriously undermined the great efforts of paying aspect the sulfurous gas reduction of discharging, NO
xContribution to acid rain presents year by year ascendant trend, and up-to-date monitoring shows, China's acid rain just by sulfuric acid type to sulfuric acid and the compound transformation of nitric acid.In the face of increasingly serious NO
xThe topsoil situation, China proposes NO during " 12 "
xReduce by 10% the binding indicator.The NO of discharging take ammonia as reductive agent SCR (SCR) stationary source (such as the fuel-burning power plant)
xThe most widely denitration technology of present industrial application, wherein NH
3Derive from liquefied ammonia, ammoniacal liquor and urea.
Urea ammonia processed has two kinds of methods: pyrolysis and hydrolysis usually.Hydrolysis method is decomposed urea with the form of the aqueous solution, there are the problems such as the burn into time of response is long in hydrolysis method, and commercial applications is less.Pyrolysis method is that the urea soln after the direct rapid heating atomizing decomposes, and heating source has Sweet natural gas, diesel oil etc.The Chinese patent application CN101125666A that name is called " technique for preparing ammonia from urea by pyrolysis method " discloses a kind of urea pyrolysis technique take diesel oil as thermal source, but its use cost is higher.Current urea pyrolysis technique for production of ammonia is less, both at home and abroad only several grasped the method, practical application still is in the primary stage, and to adopt Sweet natural gas, diesel oil etc. be thermal source, cost is high, control complexity and can cause secondary pollution.In order to adapt to new environmental standard and industrial requirement, the electric heating solution urea plant of developing a kind of economical and efficient environmental protection seems particularly important.
The utility model content
In order to solve the deficiencies in the prior art part, primary and foremost purpose of the present utility model is to provide a kind of electric heating solution urea soln device.
Another purpose of the present utility model is to provide a kind of electric heating solution urea soln ammonia-preparing device for the selective catalytic denitrification process, and it comprises above-mentioned electric heating solution urea soln device.
The purpose of this utility model is achieved through the following technical solutions: a kind of electric heating solution urea soln device comprises the pyrolysis pond; Inside, pyrolysis pond is provided with atomizing nozzle, hot plate and the temperature control heating silk of arranging successively; Urea soln is by atomizing nozzle atomisation in the pyrolysis pond, and atomized soln runs into the hot plate afterreaction through the heating of temperature control heating silk, and the gas that reaction produces is discharged by venting port;
The outside in described pyrolysis pond coats the heat tracing cover;
Described temperature control heating silk passes through current flow heats;
A kind of electric heating solution urea soln ammonia-preparing device for the selective catalytic denitrification process comprises urea dissolution system, urea soln pyrolysis system and automatic control system, and wherein, the urea dissolution system is connected with the urea soln pyrolysis system and is connected; Automatic control system is connected with the urea soln pyrolysis system with the urea dissolution system respectively;
Described electric heating solution urea soln ammonia-preparing device for the selective catalytic denitrification process also comprises the urea soln stocking system; The urea soln stocking system is arranged between urea dissolution system and the urea soln pyrolysis system; Arrange after the urea soln stocking system, the urea soln that obtains by the urea dissolution system in time is transported to the urea soln stocking system, the urea dissolution system can be on a small quantity dissolved urea repeatedly, the dissolving of urea is more thorough;
Described urea dissolution system comprises urea granules hold-up vessel, urea Weighing feeder and the urea dissolving vessel that connects successively; The urea Weighing feeder is connected with automatic control system;
Described urea dissolving vessel comprises electrothermal temperature controller, by de-mineralized water electronic grout flow meter and the solution stirrer of automatic controlling system; Electrothermal temperature controller and solution stirrer are arranged on the inside of urea dissolving vessel; De-mineralized water electronic grout flow meter by automatic controlling system is arranged on the water supply line; Automatic control system is by control urea Weighing feeder and de-mineralized water electronic grout flow meter, thereby by de-mineralized water urea dissolved in the urea dissolving vessel, obtains expecting the urea soln of concentration;
Described urea dissolution system also comprises the urea soln Send out pump that is transported to the urea soln stocking system for the urea soln that will prepare;
Described urea soln stocking system comprises the urea soln hold-up vessel, and the urea soln hold-up vessel is connected with urea soln Send out pump in the above-mentioned urea dissolution system;
The inside of described urea soln hold-up vessel arranges electrothermal temperature controller and solution stirrer;
Described urea soln stocking system also comprises for the urea soln Send out pump that urea soln is transported to the urea soln pyrolysis system; Be connected with the urea soln hold-up vessel for the urea soln Send out pump that urea soln is transported to the urea soln pyrolysis system;
Described urea soln pyrolysis system comprises successively the urea soln electronic grout flow meter by automatic controlling system that connects, electric heating solution urea soln device, ammonia surge tank and by the reducing gas electronic grout flow meter of automatic controlling system; The urea soln electronic grout flow meter is arranged on the urea soln input channel; The reducing gas electronic grout flow meter is arranged on the reducing gas output channel, is used for being controlled at the spray volume of the reducing gas that is stored in the ammonia surge tank;
On the described reducing gas output channel electrothermal temperature controller is set also;
Described urea soln pyrolysis system also comprises the flue gas gas blower that blasts the ammonia surge tank for the ammonia that produces with high-temperature flue gas with by electric heating solution urea soln device and water vapor; The flue gas gas blower is arranged between electric heating solution urea soln device and the ammonia surge tank; High-temperature flue gas and ammonia, water vapor form reducing gas;
Described ammonia surge tank inside arranges electrothermal temperature controller;
Described automatic control system comprises flue gas NO
xAnalyser and programmable logic control device; Wherein, described programmable logic control device is by data signal line and flue gas NO
xAnalyser, urea Weighing feeder, de-mineralized water electronic grout flow meter, urea soln electronic grout flow meter and reducing gas electronic grout flow meter connect;
Described flue gas NO
xThe sampling conduit of analyser is connected with SCR denitrification apparatus flue (being that flue gas enters pipeline) before; Described flue gas NO
xAnalyser is immediately to smoke collecting and detect NO
xConcentration, the collection NO of programmable logic control device basis
xConcentration data calculates urea soln pyrolysis amount and controls the urea soln electronic flow and take into account the reducing gas electronic grout flow meter and reach the purpose of adding an amount of reductive agent ammonia in the flue;
In order to realize better the purpose of this utility model, the connecting tube between described urea dissolution system, described urea soln stocking system and the described urea soln pyrolysis system is insulation design, is preferably at connecting tube electrothermal temperature controller is set;
Each device and the used material of each connecting tube are stainless steel in described urea dissolution system, urea soln stocking system and the urea pyrolysis system.
The relative prior art of the utility model has following advantage and beneficial effect:
The electric heating solution urea dissolving ammonia-preparing process that is used for the selective catalytic denitrification process that the utility model relates to is because pyrolysis way and control method all are to adopt electric energy, and this has short, efficient high of time of response with respect to hydrolysis method etc.; The utility model is take electric energy as thermal source, compares for the pyrolysis urea ammonia-preparing device of thermal source with existing Sweet natural gas, the diesel oil etc. of adopting, and has that secondary pollution is little, economical and efficient, controls simple characteristics.
Description of drawings
Fig. 1 is electric heating solution urea soln setting drawing, wherein:
3-2-1 is the pyrolysis pond, and 3-2-2 is input duct, and 3-2-3 is gas exhaust duct, and 3-2-4 is atomizing nozzle, and 3-2-5 is the temperature control heating silk, and 3-2-6 is the heat tracing cover, and 3-2-7 is hot plate.
Fig. 2 is electric heating solution urea soln ammonia-preparing device figure, wherein:
1 is the urea dissolution system, and 2 is the urea soln stocking system, and 3 is the urea soln pyrolysis system, and 4 is automatic control system;
1-1 is the urea granules hold-up vessel, and 1-2 is the urea Weighing feeder, and 1-3 is the urea dissolving vessel, and 1-4 is solution stirrer, and 1-5 is electrothermal temperature controller, and 1-6 is the de-mineralized water electronic grout flow meter, and 1-7 is the urea soln Send out pump;
2-1 is the urea soln hold-up vessel, and 2-2 is solution stirrer, and 2-3 is the urea soln Send out pump, and 2-4 is the pipeline electric heating temperature regulating device, and 2-5 is the hold-up vessel electrothermal temperature controller;
3-1 is the urea soln electronic grout flow meter, 3-2 is electric heating solution urea soln device, 3-3 is the flue gas gas blower, 3-4 is the ammonia surge tank, 3-5 is the reducing gas electronic grout flow meter, and 3-6 is the pipeline electric heating temperature regulating device, and 3-7 is pyrolysis pond electrothermal temperature controller, 3-8 is the surge tank electrothermal temperature controller, and 3-9 is the pipeline electric heating temperature regulating device;
4-1 is flue gas NO
xAnalyser, 4-2 are programmable logic control device.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but the utility model embodiment is not limited to this.
Embodiment 1
A kind of electric heating solution urea soln device as shown in Figure 1, comprises pyrolysis pond 3-2-1, input duct 3-2-2 and gas exhaust duct 3-2-3, all wraps up heat tracing cover 3-2-6 in the outside of separating pond 3-2-1, input duct 3-2-2 and gas exhaust duct 3-2-3; Inside, pyrolysis pond is provided with the atomizing nozzle 3-2-4 that arranges successively, hot plate 3-2-7 and temperature control heating silk 3-2-5, input duct 3-2-2 links to each other with atomizing nozzle 3-2-4, urea soln is after input duct 3-2-2 input and by atomizing nozzle 3-2-4 atomisation in the pyrolysis pond, after temperature control heating silk 3-2-5 passes into current flow heats, it is 600～900 ℃ that the hot plate 3-2-7 that will link to each other with temperature control heating silk 3-2-5 is heated to temperature, atomized soln runs into the hot plate 3-2-7 afterreaction after the heating, and the gas that obtains is discharged by gas exhaust duct 3-2-3.
Embodiment 2
A kind of electric heating solution urea soln ammonia-preparing device for the selective catalytic denitrification process, as shown in Figure 2: this device comprises urea dissolution system 1, urea soln stocking system 2, urea pyrolysis system 3 and automatic control system 4; Urea dissolution system 1, urea soln stocking system 2 and urea pyrolysis system 3 link to each other successively, and automatic control system 4 is connected with the urea pyrolysis system with urea soln stocking system 2 respectively and is connected.
Urea dissolution system 1 comprises urea granules hold-up vessel 1-1, urea Weighing feeder 1-2, the urea dissolving vessel 1-3 that connects successively and the urea soln Send out pump 1-7 that is used for the urea soln for preparing is transported to the urea soln stocking system; Urea Weighing feeder 1-2 is connected with automatic control system 4; Described urea dissolving vessel 1-3 comprises electrothermal temperature controller 1-5, by de-mineralized water electronic grout flow meter 1-6 and the solution stirrer 1-4 of automatic control system 4 control; Electrothermal temperature controller 1-5 and solution stirrer 1-4 are arranged on the inside of urea dissolving vessel 1-3; De-mineralized water electronic grout flow meter 1-6 by automatic control system 4 controls is arranged on the water supply line; Automatic control system 4 is by control urea Weighing feeder 1-2 and de-mineralized water electronic grout flow meter 1-6, thereby by de-mineralized water urea dissolved in urea dissolving vessel 1-3, obtains expecting the urea soln of concentration.
Urea soln stocking system 2 comprises the urea soln hold-up vessel 2-1 that connects successively and the urea soln Send out pump 2-3 that is used for urea soln is transported to urea soln pyrolysis system 3.The input duct pipeline of urea soln hold-up vessel 2-1 is connected with urea soln Send out pump 1-7, and electrothermal temperature controller 2-4 is set on this input duct.The inside of urea soln hold-up vessel 2-1 arranges electrothermal temperature controller 2-5 and solution stirrer 2-2.
Urea soln pyrolysis system 3 comprises successively the electrothermal temperature controller 3-6 that connects, by urea soln electronic grout flow meter 3-1, the electric heating solution urea soln device 3-2 of automatic control system 4 controls, be used for flue gas gas blower 3-3, ammonia surge tank 3-4 that the ammonia that produces with high-temperature flue gas with by electric heating solution urea soln device 3-2 and water vapor blast the ammonia surge tank, by reducing gas electronic grout flow meter 3-5 and the electrothermal temperature controller 3-9 of automatic controlling system; Electrothermal temperature controller 3-6 and urea soln electronic grout flow meter 3-1 are successively set on respectively on the urea soln input channel; The structure of electric heating solution urea soln device 3-2 as described in Example 1, its outside also is connected with electrothermal temperature controller 3-7; By flue gas gas blower 3-3, high-temperature flue gas and ammonia, water vapor form reducing gas; Reducing gas electronic grout flow meter 3-5 and electrothermal temperature controller 3-9 are successively set on respectively on the reducing gas output channel, are used for the spray volume that control is stored in the reducing gas of ammonia surge tank 3-4; Ammonia surge tank inside arranges electrothermal temperature controller 3-8.
Automatic control system 4 comprises flue gas NO
xAnalyser 3-1 and programmable logic control device 3-2; Programmable logic control device 3-2 by data signal line respectively with flue gas NO
xAnalyser 3-1,, urea Weighing feeder 1-2, de-mineralized water electronic grout flow meter 1-6, urea soln electronic grout flow meter 3-1, reducing gas electronic grout flow meter 3-5 connect; Flue gas NO
xThe sampling conduit of analyser 3-1 is connected with SCR denitrification apparatus flue (being that flue gas enters pipeline) before; Flue gas NO
xAnalyser 3-1 is immediately to smoke collecting and detect NO
xConcentration, the collection NO of programmable logic control device 3-2 basis
xConcentration data calculates urea soln pyrolysis amount and controls urea soln electronic grout flow meter 3-1 and reducing gas electronic grout flow meter 3-5 reaches the purpose of adding an amount of reductive agent ammonia in the flue.
Connecting tube between urea dissolution system 1, described urea soln stocking system 2 and the described urea soln pyrolysis system 3 is insulation design.
Each device and the used material of each connecting tube are stainless steel in urea dissolution system 1, urea soln stocking system 2 and the urea pyrolysis system 3.
Above-described embodiment is the better embodiment of the utility model; but embodiment of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection domain of the present utility model.
Claims (10)
1. an electric heating solution urea soln device is characterized in that: comprise the pyrolysis pond; Inside, pyrolysis pond is provided with atomizing nozzle, hot plate and the temperature control heating silk of arranging successively.
2. electric heating solution urea soln device according to claim 1 is characterized in that: the outside coating heat tracing cover in described pyrolysis pond.
3. electric heating solution urea soln ammonia-preparing device, it is characterized in that: comprise urea dissolution system, urea soln pyrolysis system and automatic control system, wherein, the urea dissolution system is connected with the urea soln pyrolysis system and is connected; Automatic control system is connected with the urea soln pyrolysis system with the urea dissolution system respectively;
Described urea dissolution system comprises urea granules hold-up vessel, urea Weighing feeder, the urea dissolving vessel that connects successively; The urea Weighing feeder is connected with automatic control system;
Described urea soln pyrolysis system comprises successively the urea soln electronic grout flow meter by automatic controlling system, claim 1 or the 2 described electric heating solution urea soln devices that connect, ammonia surge tank and by the reducing gas electronic grout flow meter of automatic controlling system;
Described automatic control system comprises flue gas NO
xAnalyser and programmable logic control device; Flue gas NO
xAnalyser is connected with programmable logic control device with the SCR denitrification apparatus respectively.
4. electric heating solution urea soln ammonia-preparing device according to claim 3, it is characterized in that: described electric heating solution urea soln ammonia-preparing device comprises the urea soln stocking system; The urea soln stocking system is arranged between described urea dissolution system and the described urea soln pyrolysis system;
Described urea soln stocking system comprises the urea soln hold-up vessel;
Described reducing gas electronic grout flow meter is arranged on the reducing gas output channel, is used for being controlled at the spray volume of the reducing gas that is stored in the ammonia surge tank.
5. electric heating solution urea soln ammonia-preparing device according to claim 4 is characterized in that:
Described urea dissolving vessel comprises electrothermal temperature controller, by de-mineralized water electronic grout flow meter and the solution stirrer of automatic controlling system; Electrothermal temperature controller and solution stirrer are arranged on the inside of urea dissolving vessel; De-mineralized water electronic grout flow meter by automatic controlling system is arranged on the water supply line;
Described urea dissolution system also comprises the urea soln Send out pump that is transported to the urea soln stocking system for the urea soln that will prepare; Be arranged between described urea dissolving vessel and the described urea soln hold-up vessel for the urea soln Send out pump that the urea soln for preparing is transported to the urea soln stocking system;
Described urea soln stocking system also comprises for the urea soln Send out pump that urea soln is transported to the urea soln pyrolysis system; Be arranged between described urea soln hold-up vessel and the described urea soln electronic grout flow meter by automatic controlling system for the urea soln Send out pump that urea soln is transported to the urea soln pyrolysis system;
Described urea soln pyrolysis system comprises the flue gas gas blower that blasts the ammonia surge tank for the ammonia that produces with high-temperature flue gas with by electric heating solution urea soln device and water vapor; The flue gas gas blower is arranged between electric heating solution urea soln device and the ammonia surge tank.
6. electric heating solution urea soln ammonia-preparing device according to claim 5, it is characterized in that: the inside of described urea soln hold-up vessel arranges electrothermal temperature controller and solution stirrer;
7. electric heating solution urea soln ammonia-preparing device according to claim 4 is characterized in that: on the described reducing gas output channel electrothermal temperature controller is set also;
8. electric heating solution urea soln ammonia-preparing device according to claim 5, it is characterized in that: described ammonia surge tank inside arranges electrothermal temperature controller.
9. electric heating solution urea soln ammonia-preparing device according to claim 4, it is characterized in that: the connecting tube between described urea dissolution system, described urea soln stocking system and the described urea soln pyrolysis system is insulation design.
10. electric heating solution urea soln ammonia-preparing device according to claim 5 is characterized in that: each device and the used material of each connecting tube in described urea dissolution system, urea soln stocking system and the urea soln pyrolysis system are stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220066410 CN202729821U (en) | 2012-02-27 | 2012-02-27 | Electric pyrolytic urea solution device and electric pyrolytic urea solution ammonia generating device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220066410 CN202729821U (en) | 2012-02-27 | 2012-02-27 | Electric pyrolytic urea solution device and electric pyrolytic urea solution ammonia generating device thereof |
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|---|---|
| CN202729821U true CN202729821U (en) | 2013-02-13 |
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|---|---|---|---|
| CN 201220066410 Expired - Lifetime CN202729821U (en) | 2012-02-27 | 2012-02-27 | Electric pyrolytic urea solution device and electric pyrolytic urea solution ammonia generating device thereof |
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| CN (1) | CN202729821U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580529A (en) * | 2012-02-27 | 2012-07-18 | 环境保护部华南环境科学研究所 | Electro-pyrolytic urea solution ammonia production device used for selective catalytic denitration and application thereof |
| CN105883853A (en) * | 2016-06-28 | 2016-08-24 | 盐城工学院 | Method for preparing ammonia with urea |
| CN109437237A (en) * | 2018-12-21 | 2019-03-08 | 广东工业大学 | A method of automation fixed nitrogen ammonia |
-
2012
- 2012-02-27 CN CN 201220066410 patent/CN202729821U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580529A (en) * | 2012-02-27 | 2012-07-18 | 环境保护部华南环境科学研究所 | Electro-pyrolytic urea solution ammonia production device used for selective catalytic denitration and application thereof |
| CN102580529B (en) * | 2012-02-27 | 2014-10-08 | 环境保护部华南环境科学研究所 | Electro-pyrolytic urea solution ammonia production device used for selective catalytic denitration and application thereof |
| CN105883853A (en) * | 2016-06-28 | 2016-08-24 | 盐城工学院 | Method for preparing ammonia with urea |
| CN105883853B (en) * | 2016-06-28 | 2019-01-04 | 盐城工学院 | A kind of method that urea prepares ammonia |
| CN109437237A (en) * | 2018-12-21 | 2019-03-08 | 广东工业大学 | A method of automation fixed nitrogen ammonia |
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| C14 | Grant of patent or utility model | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20130213 |