CN214862525U - Gaseous energy collector of denitrifier - Google Patents
Gaseous energy collector of denitrifier Download PDFInfo
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- CN214862525U CN214862525U CN202023085609.3U CN202023085609U CN214862525U CN 214862525 U CN214862525 U CN 214862525U CN 202023085609 U CN202023085609 U CN 202023085609U CN 214862525 U CN214862525 U CN 214862525U
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- denitrifier
- flue gas
- denitration
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Abstract
The utility model provides a gaseous energy collector of denitration agent, include: a heat exchange housing; a snake-shaped heat exchange tube is arranged in the heat exchange shell; air entering the heat exchange pipe flows to the industrial furnace after being heated by high-temperature flue gas in the heat exchange shell, and is sprayed out by a denitration spray gun arranged in the industrial furnace; the heat exchange shell is matched with the heat exchange tube to realize heat exchange between air in the heat exchange tube and high-temperature flue gas. The utility model effectively prevents the low temperature air from reducing the temperature in the industrial furnace; the decomposition reaction of the denitration liquid is advanced, the reduction reaction interval of the nitrogen oxides in the flue gas is lengthened, and the flue gas desulfurization efficiency is improved.
Description
Technical Field
The utility model relates to an industry flue gas denitration technical field particularly, relates to a gaseous energy collector of denitrifier.
Background
Denitration is a process for removing nitric oxide in combustion flue gas, has importance of preventing environmental pollution, is pointed out as a problem in the world, and is a mainstream work in the worldThe process comprises the following steps: SCR and SNCR; the SCR denitration technology is that under the action of a catalyst, an amino reducing agent and NO in the flue gasxA selective reduction reaction is carried out to generate N2And H2O, and there is not any clean technology that exhaust gas, waste water discharge, SCR flue gas denitration technology, amino reducing agent can adopt liquid ammonia, ammonia water and urea, because liquid ammonia belongs to dangerous explosive chemical, its transportation, storage and use have strict limits, therefore, with people's safety consciousness is increasing, more and more places begin to limit the application of liquid ammonia in flue gas SCR denitration system, ammonia water below 25% can be stored under normal pressure, there is no safety hazard in transportation and use, but because the ammonia water concentration is lower, about 80% useless water is gasified at the same time in the ammonia gasification process, consume a large amount of heat energy, therefore, the use cost is very high, urea is the safest, environmental-friendly amino reducing agent in SCR denitration technology, urea is an organic compound composed of carbon, nitrogen, oxygen, hydrogen, is a white crystal, one of the simplest organic compounds, is the main nitrogen-containing end product of the metabolism and decomposition of proteins in mammals and certain fishes, and is also the nitrogen fertilizer with the highest nitrogen content at present, and urea needs to be hydrolyzed at high temperature and high pressure or pyrolyzed at high temperature and high heat during the use process.
In the prior art, generally, the denitration liquid is blown into the furnace by compressed air, the denitration liquid enters the industrial furnace and then absorbs heat for decomposition, however, the temperature of the furnace is reduced after the denitration liquid enters the furnace due to the fact that the compressed air is low in temperature, the decomposition reaction area of the denitration liquid is extremely short, ammonia generated by decomposition of the denitration liquid is generated due to the fact that the boiler is small in size and high in flue gas flow rate, the ammonia can flow to the tail of the boiler quickly, the temperature of the flue gas at the tail of the boiler is lower than 800-.
In view of this, the present invention is especially provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a denitrifier gas energy concentrator, which heats the air in a heat exchange pipe through high-temperature flue gas, so that the temperature of the air entering an industrial furnace is raised, and the temperature of the air entering the industrial furnace is prevented from being reduced; through arranging the heat exchange tubes in the heat exchange shell in a snake shape, the flow path of air in the heat exchange shell is lengthened, the heating effect of high-temperature flue gas on the air is ensured, and the gas temperature is improved.
In order to realize the above purpose of the utility model, the following technical scheme is adopted:
the utility model provides a gaseous energy collector of denitration agent, include: a heat exchange housing; a snake-shaped heat exchange tube is arranged in the heat exchange shell; air entering the heat exchange pipe flows to the industrial furnace after being heated by high-temperature flue gas in the heat exchange shell, and is sprayed out by a denitration spray gun arranged in the industrial furnace; the heat exchange shell is matched with the heat exchange tube to realize heat exchange between air and flue gas in the heat exchange tube.
In the prior art, denitration liquid is generally blown into an industrial furnace by compressed air in industrial flue gas denitration, but the denitration method has the following defects:
1. the temperature of the compressed air is generally about 20 ℃, the temperature in the industrial furnace can be reduced after the compressed air enters the industrial furnace, and the reaction of the denitration liquid and nitrogen oxides in the industrial flue gas is not facilitated;
2. the denitration liquid directly enters the industrial furnace to be subjected to endothermic decomposition, the reaction interval is short, a large amount of ammonia obtained by decomposition is overflowed into the air along with the industrial flue gas without reacting with nitrogen oxides in the industrial flue gas, the denitration efficiency is low, and the medicament waste is serious.
In order to solve the technical problem, the utility model provides a denitrifier gas energy concentrator which is matched with a heat exchange shell through a heat exchange tube and heats air through high-temperature flue gas, so that the air has higher temperature before entering an industrial furnace kiln, and the temperature is effectively prevented from being reduced after entering the furnace kiln; simultaneously, heated air enters the denitration spray gun, the denitration liquid is heated and decomposed in the denitration spray gun, and decomposed ammonia gas directly reacts with nitrogen oxide in the industrial furnace kiln, so that the reaction interval of the denitration liquid and industrial flue gas is prolonged, the denitration rate is improved, and the waste of medicaments is reduced.
Preferably, the heat exchange tube comprises a gas inlet for introducing air, a U-shaped tube, a branch tube and a gas outlet; the U-shaped pipes and the branch pipes are all in multiple groups; the gas inlet, the U-shaped pipe and the gas outlet are all arranged on the outer wall of the gas heat exchanger, and the branch pipe is arranged inside the gas heat exchanger; the gas inlet, the U-shaped pipe and the gas outlet are connected in series through the branch pipes to form a passage. The air is heated by high temperature flue gas in the branch pipe, and the setting of a plurality of branch pipes has prolonged the heating interval of air, has improved the heating effect.
Preferably, the gas outlet is connected with a gas-phase inlet of the denitration lance. The heated air enters the denitration spray gun through the gas inlet, and the denitration liquid is heated and decomposed and then is sent into the industrial furnace.
Preferably, a denitration liquid inlet is formed in the denitration spray gun, and the denitration liquid inlet is positioned in front of the gas-phase inlet along the flowing direction of the denitration liquid; the denitration liquid inlet is connected with the medicine storage tank, and a water pump is arranged between the denitration liquid inlet and the medicine storage tank. The denitration liquid is arranged at the front opening of the denitration spray gun, the air is arranged behind the denitration liquid, the denitration liquid is atomized by utilizing the heated air to be changed into gas, the liquid phase is converted into gas phase, meanwhile, the denitration liquid is decomposed into ammonia gas under the high-temperature environment, and the ammonia gas reacts with the nitric oxide in the industrial flue gas to reduce the nitric oxide into nitrogen gas.
Preferably, the gas inlet is connected with an air compressor, the air compressor with stop valve and check valve have set gradually along the air flow direction between the gas inlet. The air compressor machine provides the air that needs in the denitration process, ensures the stability of denitration process.
Preferably, the denitration spray guns are in multiple groups, and the multiple groups of denitration spray guns penetrate through the inner wall of the industrial furnace and are arranged in the middle of the industrial furnace so that the denitration spray guns spray denitration gas in a temperature area of 800-900 ℃ in the boiler. Further, the denitration spray gun is arranged in a temperature area of 900 ℃ in the boiler. In the temperature range, the reaction efficiency of the ammonia gas decomposed in the denitration liquid and the nitrogen oxide in the industrial flue gas is highest, and the denitration effect is best.
Preferably, a flue gas outlet is formed in the heat exchange shell and connected with the industrial furnace kiln, and flue gas flows back into the boiler from the flue gas outlet after being subjected to heat exchange through the heat exchange shell.
Preferably, the heat exchange shell is provided with a flue gas inlet; the flue gas inlet is connected with the middle part of the industrial furnace to lead out the flue gas in the temperature area of 400-600 ℃ in the industrial furnace; and a fan is arranged between the flue gas inlet and the industrial furnace. The flue gas is taken out from the temperature area of 400-plus-600 ℃ of the boiler and enters the heat exchange shell to heat the air, so that the air can be heated to the temperature of 200-plus-300 ℃, and the temperature in the industrial furnace is prevented from being greatly reduced after the air enters the industrial furnace.
Compared with the prior art, the beneficial effects of the utility model reside in that:
(1) the denitration agent gas energy concentrator of the utility model is matched with the heat exchange shell through the heat exchange tube, and heats the air through the high-temperature flue gas, so that the air has higher temperature before entering the industrial furnace kiln, and the temperature reduction after the air enters the furnace kiln is effectively prevented;
(2) air is heated and then sent into the denitration spray gun, the denitration liquid is heated and decomposed in the denitration spray gun, and decomposed ammonia enters the industrial furnace to directly react with nitrogen oxide, so that the reaction interval of the denitration liquid and industrial flue gas is prolonged, the denitration efficiency is improved, and the waste of chemicals is reduced;
(3) through setting up the import of denitration liquid in the place ahead of gaseous phase import, utilize the air after the heating to atomize denitration liquid, become gaseous, the liquid phase converts the gaseous phase into, makes denitration liquid decompose out the ammonia under high temperature environment simultaneously, and the ammonia reacts with the nitrogen oxide in the industrial flue gas, reduces nitrogen oxide into nitrogen gas, has improved the efficiency of denitration.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic connection diagram of a denitration apparatus provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a heat exchange housing according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view taken along the right side of FIG. 2;
fig. 4 is the embodiment of the utility model provides a structural schematic of denitration spray gun.
Wherein:
10-a medicine storage tank; 20-a denitration spray gun;
201-inlet of denitrating liquid; 202-gas phase inlet;
30-industrial furnace kiln; 40-a fan;
50-a heat exchange shell; 501-a flue gas outlet;
502-gas inlet; 503-branch pipe;
504-a U-shaped tube; 505-gas outlet;
506-a flue gas inlet; 60-a check valve;
70-a stop valve; 80-air compressor.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings and detailed description, but those skilled in the art will understand that the following described embodiments are some, not all, of the embodiments of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to clarify the technical solution of the present invention, the following description is made in the form of specific embodiments.
Examples
Referring to fig. 1 to 4, the present embodiment provides a denitrifier gas concentrator including: a heat exchange housing 50; serpentine heat exchange tubes are arranged inside the heat exchange shell 50; air entering the heat exchange pipe flows to the industrial furnace 30 after being heated by high-temperature flue gas in the heat exchange shell 50 and is sprayed out through a denitration spray gun 20 arranged in the industrial furnace 30; the heat exchange shell 50 is matched with the heat exchange tube to realize the heat exchange between the air and the flue gas in the heat exchange tube.
Wherein, the heat exchange shell 50 is provided with a flue gas inlet 506; the flue gas inlet 506 is connected with the middle part of the industrial furnace 30 to lead out the flue gas in the temperature area of 400-600 ℃ in the industrial furnace 30; a fan 40 is arranged between the flue gas inlet 506 and the industrial furnace 30. The flue gas is taken out from the temperature area of 400-.
The heat exchange shell 50 is provided with a flue gas outlet 501, the flue gas outlet 501 is connected with the industrial furnace kiln 30, and flue gas flows back into the furnace from the flue gas outlet 501 after heat exchange through the heat exchange shell 50.
As shown in fig. 2 to 3, the heat exchange tube includes a gas inlet 502 for introducing air, a U-shaped tube 504, a branch tube 503 and a gas outlet 505; the U-shaped pipes 504 and the branch pipes 503 are all in multiple groups; the gas inlet 502, the U-shaped pipe 504 and the gas outlet 505 are all arranged on the outer wall of the gas heat exchanger, and the branch pipe 503 is arranged inside the gas heat exchanger; the gas inlet 502, the U-shaped pipe 504 and the gas outlet 505 are connected in series with each other through the branch pipe 503 to form a passage. Air enters from the gas inlet 502 and is heated in the branch 503 by the hot flue gas.
The air compressor 80 is connected to the air inlet 502, and the stop valve 70 and the check valve 60 are sequentially arranged between the air compressor 80 and the air inlet 502 along the air flowing direction.
The gas outlet 505 is connected to the gas phase inlet 202 of the denitration lance 20. The heated air enters the denitration spray gun 20 through the gas inlet 502, and the denitration liquid is heated and decomposed and then sent to the industrial kiln 30.
As shown in fig. 4, the denitration spray gun 20 is provided with a denitration liquid inlet 201, and the denitration liquid inlet 201 is located in front of the gas phase inlet 202 along the flow direction of the denitration liquid; denitration liquid import 201 and medicine storage tank 10 link to each other, and be provided with the water pump between denitration liquid import 201 and medicine storage tank 10. The denitration liquid is arranged at the front opening of the denitration spray gun 20, the air is arranged behind the denitration liquid, the denitration liquid is atomized by utilizing the heated air to be changed into gas, the liquid phase is converted into gas phase, meanwhile, the denitration liquid is decomposed into ammonia gas under the high-temperature environment, and the ammonia gas reacts with the nitrogen oxide in the industrial flue gas to reduce the nitrogen oxide in the industrial flue gas into nitrogen gas.
Wherein, denitration spray gun 20 is the multiunit, and multiunit denitration spray gun 20 pierces through the inner wall of industrial furnace 30 and sets up in the middle part of industrial furnace 30 so that denitration spray gun 20 jets denitration gas in the boiler 800-. Further, the denitration lance 20 is disposed in a temperature region of 900 ℃ in the boiler so as to maximize the reaction efficiency of the ammonia gas decomposed in the denitration liquid and the nitrogen oxide in the industrial flue gas.
The denitration process of the denitration agent gas concentrator of the embodiment is as follows: air enters the heat exchange tube through the air compressor 80, the fan 40 pumps high-temperature flue gas in the industrial kiln 30 out to the heat exchange shell 50, the industrial flue gas exchanges heat with the air, the air temperature rises, the industrial flue gas flows back to the industrial kiln 30 through the flue gas outlet 501, the heated air enters the denitration spray gun 20 through the gas outlet 505, meanwhile, the denitration liquid flows into the denitration spray gun 20, the air gasifies the denitration liquid, and meanwhile, the denitration liquid decomposes ammonia gas at the high temperature provided by the air and enters the industrial kiln 30 to carry out denitration reduction on the industrial flue gas.
The denitrifier gas energy concentrator of the embodiment is matched with the heat exchange shell through the heat exchange tube, and heats air through high-temperature flue gas, so that the air has higher temperature before entering the industrial furnace kiln, and the temperature is effectively prevented from being reduced after entering the furnace kiln; air is heated and then sent into the denitration spray gun, the denitration liquid is heated and decomposed in the denitration spray gun, and decomposed ammonia enters the industrial furnace to directly react with nitrogen oxide, so that the reaction interval of the denitration liquid and industrial flue gas is prolonged, the denitration efficiency is improved, and the waste of chemicals is reduced; through setting up the import of denitration liquid in the place ahead of gaseous phase import, utilize the air after the heating to atomize denitration liquid, become gaseous, the liquid phase converts the gaseous phase into, makes denitration liquid decompose out the ammonia under high temperature environment simultaneously, and the ammonia reacts with the nitrogen oxide in the industrial flue gas, reduces nitrogen oxide into nitrogen gas, has improved the efficiency of denitration.
In a word, the denitration agent gas energy concentrator of the utility model prevents the entering air from reducing the temperature in the industrial furnace kiln by heating the air in advance; the decomposition of the denitration liquid is advanced, the reduction reaction interval is lengthened, and the flue gas desulfurization efficiency is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (8)
1. A denitrifier gas concentrator, comprising: a heat exchange housing; a snake-shaped heat exchange tube is arranged in the heat exchange shell; air entering the heat exchange pipe flows to the industrial furnace after being heated by high-temperature flue gas in the heat exchange shell, and is sprayed out by a denitration spray gun arranged in the industrial furnace; the heat exchange shell is matched with the heat exchange tube to realize heat exchange between air in the heat exchange tube and high-temperature flue gas.
2. The denitrifier gas concentrator according to claim 1, wherein the heat exchange pipe comprises a gas inlet for letting in air, a U-shaped pipe, a branch pipe and a gas outlet; the U-shaped pipes and the branch pipes are all in multiple groups; the gas inlet, the U-shaped pipe and the gas outlet are all arranged on the outer wall of the gas heat exchanger, and the branch pipe is arranged inside the gas heat exchanger; the gas inlet, the U-shaped pipe and the gas outlet are connected in series through the branch pipes to form a passage.
3. The denitrifier gas concentrator according to claim 2, wherein the gas outlet is connected to the gas phase inlet of the denitrifier lance.
4. The denitrifier gas concentrator according to claim 3, wherein the denitrifier lance is provided with a denitrifier liquid inlet, and the denitrifier liquid inlet is positioned in front of the gas phase inlet in the flow direction of the denitrifier liquid; the denitration liquid inlet is connected with the medicine storage tank, and a water pump is arranged between the denitration liquid inlet and the medicine storage tank.
5. The denitrifier gas concentrator according to claim 2, wherein the gas inlet is connected with an air compressor, and a stop valve and a check valve are sequentially arranged between the air compressor and the gas inlet along the air flowing direction.
6. The denitrifier gas concentrator as defined in claim 1, wherein the denitrifier gas concentrators are arranged in a plurality of groups, and the plurality of groups of denitrifier gas concentrators penetrate through the inner wall of the industrial furnace and are arranged in the middle of the industrial furnace so that the denitrifier gas concentrators spray denitrifier gas in a temperature range of 800-900 ℃ in the industrial furnace.
7. The denitrifier gas concentrator as defined in claim 1, wherein the heat exchange housing is provided with a flue gas outlet, the flue gas outlet is connected to the industrial furnace, and flue gas flows back into the industrial furnace from the flue gas outlet after being subjected to heat exchange by the heat exchange housing.
8. The denitrifier gas concentrator according to claim 1, wherein the heat exchange housing is provided with a flue gas inlet; the flue gas inlet is connected with the middle part of the industrial furnace to lead out the flue gas in the temperature area of 400-600 ℃ in the industrial furnace; and a fan is arranged between the flue gas inlet and the industrial furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023085609.3U CN214862525U (en) | 2020-12-21 | 2020-12-21 | Gaseous energy collector of denitrifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023085609.3U CN214862525U (en) | 2020-12-21 | 2020-12-21 | Gaseous energy collector of denitrifier |
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| Publication Number | Publication Date |
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| CN214862525U true CN214862525U (en) | 2021-11-26 |
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| CN202023085609.3U Active CN214862525U (en) | 2020-12-21 | 2020-12-21 | Gaseous energy collector of denitrifier |
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| Country | Link |
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| CN (1) | CN214862525U (en) |
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2020
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