CN204684948U - A kind of pyrolysis installation quoted high-temperature flue gas and add thermal denitration urea - Google Patents
A kind of pyrolysis installation quoted high-temperature flue gas and add thermal denitration urea Download PDFInfo
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- CN204684948U CN204684948U CN201520321632.8U CN201520321632U CN204684948U CN 204684948 U CN204684948 U CN 204684948U CN 201520321632 U CN201520321632 U CN 201520321632U CN 204684948 U CN204684948 U CN 204684948U
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Abstract
The utility model discloses a kind of pyrolysis installation quoted high-temperature flue gas and add thermal denitration urea, comprise pyrolysis oven, boiler, flue, flue gas fairlead, deduster, adjustment wind passage, spray gun, atomizing air pipeline and urea liquid preparation system; The exhanst gas outlet of boiler is connected with the entrance of flue, the opening in communication of flue gas fairlead and flue side, the outlet of flue gas fairlead is connected with the smoke inlet of deduster, the exhanst gas outlet of deduster and regulate the outlet of wind passage by pipeline and the smoke inlet at Guan Houyu pyrolysis oven top is connected, regulate in wind passage and be provided with adjustable baffle plate, be provided with ammonia-spraying grid in flue, the gas vent on pyrolysis oven is connected with the ammonia-spraying grid in flue; The shower nozzle of spray gun is arranged in pyrolysis oven, and the entrance of spray gun is connected with the outlet of urea liquid preparation system and the outlet of atomizing air pipeline.The utility model can not rely on the pyrolysis that electric heater realizes urea, and cost is low.
Description
Technical field
The utility model belongs to energy-conserving and environment-protective field, relates to a kind of pyrolysis installation, is specifically related to a kind of pyrolysis installation quoted high-temperature flue gas and add thermal denitration urea.
Background technology
Pulverized-coal fired boiler reduces discharged nitrous oxides, generally adopts SCR denitration technique, and according to storage, the preparation method difference of reducing agent, SCR denitration technique can be divided into: liquid ammonia process for caustic soda purification, Ammonia Process, urea method etc.
Liquefied ammonia and ammoniacal liquor are all noxious materials, and its transport and storage all belong to major hazard source, have larger security risk.Country is quite strict to the management and control of these two kinds of materials, and project's earlier stage needs applying unit to obtain the supportive files such as transportation route license, the safety evaluation stored and environmental impact assessment certification.The project later stage needs applying unit to use registration unit to register to hazardous chemical, obtains hazardous chemical and uses registration card.
In liquefied ammonia, ammoniacal liquor, urea, carry out reducing agent selection, be generally consider from security standpoint in the world.Although the technology of taking precautions against liquefied ammonia accident external is more and more thinner, but because the occupancy permit obtaining liquefied ammonia from authorities is more and more difficult, safety precaution requires more and more, the safety cost of corresponding cost is also increasing, therefore, present ammoniacal liquor and urea use as denitrification reducing agent just more and more, particularly nearest 10 years, adopt urea to rise rapidly as the SCR ratio of reducing agent, become prevailing technology prepared by denitrification reducing agent gradually.At present, consider for fixed investment and operating cost, domestic most SCR device selects liquid ammonia process for caustic soda purification reducing agent preparation technology, but to the strict area of security requirement, urea pyrolysis method still be final selection.Urea pyrolysis system connects skirt road by heat primary air usually, electric heater, pyrolysis oven form.Heat primary air draws respectively from boiler air preheater heat primary air outlet conduits, and causes electric heater entrance.Electric heater adopts U-shaped layout usually, and the hot blast after heating can meet urea pyrolysis heat of reaction demand, and ensures that crystalline polamer again does not appear in the reproducibility mist produced.Pyrolysis oven is arranged vertically usually.Several urea liquid atomizing lances are set in urea solution jet/distribution system, utilize metering module device to urea liquid in spray gun and atomization air flow measure, distribute, control and regulate.The major technique deficiency of current urea pyrolysis is to cause the operating cost that power plant is too high every year by the high power consumption of electric heater.
Existing Patents technology utilizes the weary gas of boiler by setting up heat exchanger at present, adds thermal denitration urea pyrolysis stove dilution wind, but need be increased to target temperature again owing to heating rear dilution air temperature, so electrical heating continues to retain, also need certain operating cost.And well do not solved by the emission problem of the exhaust steam after heat exchanger.
Utility model content
The purpose of this utility model is the shortcoming overcoming above-mentioned prior art, and provide a kind of pyrolysis installation quoted high-temperature flue gas and add thermal denitration urea, this device can not rely on the pyrolysis that electric heater realizes urea, and cost is low.
For achieving the above object, described in the utility modelly quoting the pyrolysis installation that high-temperature flue gas adds thermal denitration urea and comprise pyrolysis oven, boiler, flue, flue gas fairlead, deduster, adjustment wind passage, spray gun, atomizing air pipeline and urea liquid preparation system;
The exhanst gas outlet of described boiler is connected with the entrance of flue, the opening in communication of flue gas fairlead and flue side, the outlet of flue gas fairlead is connected with the smoke inlet of deduster, the exhanst gas outlet of deduster and regulate the outlet of wind passage by pipeline and the smoke inlet at Guan Houyu pyrolysis oven top is connected, regulate in wind passage and be provided with adjustable baffle plate, be provided with ammonia-spraying grid in flue, the gas vent on pyrolysis oven is connected with the ammonia-spraying grid in flue;
The shower nozzle of described spray gun is arranged in pyrolysis oven, and the entrance of spray gun is connected with the outlet of urea liquid preparation system and the outlet of atomizing air pipeline.
Also comprise blower fan, the gas access of blower fan is connected with the gas vent on pyrolysis oven, and the gas vent of blower fan is connected with the ammonia-spraying grid in flue.
The outlet of described urea liquid preparation system is connected with the entrance of spray gun by urea solution metering controller.
Also comprise the flushing water pipeline be connected with the entrance of spray gun, flushing water pipeline is provided with valve.
The gas vent of described pyrolysis oven is positioned at the bottom of pyrolysis oven.
The utility model has following beneficial effect:
High-temperature flue gas of quoting described in the utility model adds the pyrolysis installation of thermal denitration urea operationally, flue gas fairlead draws a road high-temperature flue gas from flue, and described high-temperature flue gas is entered into pyrolysis oven after dedusting, the pyrolysis being urea by the heat of high-temperature flue gas provides heat, do not need to convert electrical energy into heat energy, thus avoid the use of electric heater, the ammonia-spraying grid of mist in flue of the flue gas that pyrolysis oven exports and flue gas is ejected in flue, realize the object of denitration reaction, the utility model efficiently solves thermal power generation and becomes the problem that in denitration urea pyrolysis system, energy consumption is high, optimize original denitration solution hot systems, the operating cost of better reduction denitrating flue gas, energy-saving and emission-reduction, there is stronger practicality.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Wherein, 1 be urea liquid preparation system, 2 be pyrolysis oven, 3 be ammonia-spraying grid, 4 be blower fan, 5 be flue gas fairlead, 6 be deduster, 7 for regulating wind passage, 8 to be urea solution metering controller, 9 be spray gun, 10 be flushing water pipeline, 11 be atomizing air pipeline.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
With reference to figure 1, described in the utility modelly quote the pyrolysis installation that high-temperature flue gas adds thermal denitration urea and comprise pyrolysis oven 2, boiler, flue, flue gas fairlead 5, deduster 6, regulate wind passage 7, spray gun 9, atomizing air pipeline 11 and urea liquid preparation system 1; The exhanst gas outlet of boiler is connected with the entrance of flue, the opening in communication of flue gas fairlead 5 and flue side, the outlet of flue gas fairlead 5 is connected with the smoke inlet of deduster 6, the exhanst gas outlet of deduster 6 and regulate the outlet of wind passage 7 by pipeline and the smoke inlet at Guan Houyu pyrolysis oven 2 top is connected, regulate in wind passage 7 and be provided with adjustable baffle plate, be provided with ammonia-spraying grid 3 in flue, the gas vent on pyrolysis oven 2 is connected with the ammonia-spraying grid 3 in flue; The shower nozzle of spray gun 9 is arranged in pyrolysis oven 2, and the entrance of spray gun 9 is connected with the outlet of the outlet of urea liquid preparation system 1 and atomizing air pipeline 11.
It should be noted that, the utility model also comprises blower fan 4, and the gas access of blower fan 4 is connected with the gas vent on pyrolysis oven 2, and the gas vent of blower fan 4 is connected with the ammonia-spraying grid 3 in flue; The outlet of urea liquid preparation system 1 is connected by the entrance of urea solution metering controller 8 with spray gun 9.The utility model also comprises the flushing water pipeline 10 be connected with the entrance of spray gun 9, and flushing water pipeline 10 is provided with valve; The gas vent of pyrolysis oven 2 is positioned at the bottom of pyrolysis oven 2.
Specific works process of the present utility model is:
Flue gas fairlead 5 draws the high-temperature flue gas of 550 ~ 650 DEG C through deduster 6 filtering from flue, high-temperature flue gas after dedusting enters into pyrolysis oven 2 from the smoke inlet at pyrolysis oven 2 top after regulating the adjustment of wind passage 7 to enter into the temperature of flue gas in pyrolysis oven 2, simultaneously the urea liquid prepared of urea preparation system enters into spray gun 9 entrance together with the atomizing air that exports with atomizing air pipeline 11 after urea solution metering controller 8 adjust flux, urea liquid is atomized into droplet through spray gun 9 compressed air, then spray in pyrolysis oven 2 through shower nozzle, and utilize the heat of high-temperature flue gas in pyrolysis oven 2 to carry out pyrolysis generation ammonia, the mist of the flue gas that pyrolysis oven 2 exports and ammonia is injected to flue from the ammonia-spraying grid 3 in flue after blower fan 4 drainage, realize the object of denitration reaction in flue gas.
Claims (5)
1. the pyrolysis installation quoted high-temperature flue gas and add thermal denitration urea, it is characterized in that, comprise pyrolysis oven (2), boiler, flue, flue gas fairlead (5), deduster (6), regulate wind passage (7), spray gun (9), atomizing air pipeline (11) and urea liquid preparation system (1);
The exhanst gas outlet of described boiler is connected with the entrance of flue, the opening in communication of flue gas fairlead (5) and flue side, the outlet of flue gas fairlead (5) is connected with the smoke inlet of deduster (6), the exhanst gas outlet of deduster (6) and regulate the outlet of wind passage (7) by pipeline and the smoke inlet at Guan Houyu pyrolysis oven (2) top is connected, regulate in wind passage (7) and be provided with adjustable baffle plate, ammonia-spraying grid (3) is provided with in flue, gas vent on pyrolysis oven (2) is connected with the ammonia-spraying grid (3) in flue,
The shower nozzle of described spray gun (9) is arranged in pyrolysis oven (2), and the entrance of spray gun (9) is connected with the outlet of the outlet of urea liquid preparation system (1) and atomizing air pipeline (11).
2. the pyrolysis installation quoted high-temperature flue gas and add thermal denitration urea according to claim 1, it is characterized in that, also comprise blower fan (4), the gas access of blower fan (4) is connected with the gas vent on pyrolysis oven (2), and the gas vent of blower fan (4) is connected with the ammonia-spraying grid (3) in flue.
3. the pyrolysis installation quoted high-temperature flue gas and add thermal denitration urea according to claim 1, it is characterized in that, the outlet of described urea liquid preparation system (1) is connected by the entrance of urea solution metering controller (8) with spray gun (9).
4. the pyrolysis installation quoted high-temperature flue gas and add thermal denitration urea according to claim 1, it is characterized in that, also comprise the flushing water pipeline (10) be connected with the entrance of spray gun (9), flushing water pipeline (10) is provided with valve.
5. the pyrolysis installation quoted high-temperature flue gas and add thermal denitration urea according to claim 1, is characterized in that, the gas vent of described pyrolysis oven (2) is positioned at the bottom of pyrolysis oven (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520321632.8U CN204684948U (en) | 2015-05-18 | 2015-05-18 | A kind of pyrolysis installation quoted high-temperature flue gas and add thermal denitration urea |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520321632.8U CN204684948U (en) | 2015-05-18 | 2015-05-18 | A kind of pyrolysis installation quoted high-temperature flue gas and add thermal denitration urea |
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| CN204684948U true CN204684948U (en) | 2015-10-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104906932A (en) * | 2015-05-18 | 2015-09-16 | 西安西热锅炉环保工程有限公司 | Pyrolysis device capable of heating denitration urea by introducing high-temperature flue gas |
| CN107158935A (en) * | 2017-05-19 | 2017-09-15 | 中国神华能源股份有限公司 | SCR denitration is controlled to be pyrolyzed the method and device of furnace temperature |
| CN109761245A (en) * | 2019-03-22 | 2019-05-17 | 大唐环境产业集团股份有限公司 | A kind of urea pyrolysis ammonia-preparing device and technique based on high-temperature flue gas |
-
2015
- 2015-05-18 CN CN201520321632.8U patent/CN204684948U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104906932A (en) * | 2015-05-18 | 2015-09-16 | 西安西热锅炉环保工程有限公司 | Pyrolysis device capable of heating denitration urea by introducing high-temperature flue gas |
| CN107158935A (en) * | 2017-05-19 | 2017-09-15 | 中国神华能源股份有限公司 | SCR denitration is controlled to be pyrolyzed the method and device of furnace temperature |
| CN109761245A (en) * | 2019-03-22 | 2019-05-17 | 大唐环境产业集团股份有限公司 | A kind of urea pyrolysis ammonia-preparing device and technique based on high-temperature flue gas |
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