CN210874842U - Blast furnace flue afterbody denitration purifier - Google Patents
Blast furnace flue afterbody denitration purifier Download PDFInfo
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- CN210874842U CN210874842U CN201921787140.2U CN201921787140U CN210874842U CN 210874842 U CN210874842 U CN 210874842U CN 201921787140 U CN201921787140 U CN 201921787140U CN 210874842 U CN210874842 U CN 210874842U
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Abstract
The utility model discloses a blast furnace flue afterbody denitration purifier relates to environmental protection equipment technical field, including the casing, the second temperature control chamber has been seted up to SCR reaction vessel's inside, the opposite side upper portion fixedly connected with EBA reactor of casing, the last fixed surface of EBA reactor is connected with electron beam generator. The utility model discloses a set up first temperature control chamber and second temperature control chamber, fill the high temperature steam in the stove in first temperature control chamber and second temperature control intracavity, provide SNCR reaction vessel and the suitable denitration temperature of SCR reaction vessel, strengthen the catalytic effect of catalysis board, guarantee that the blast furnace flue gas is purified by the denitration smoothly, reduce clarification plant's running cost, realize circular economy, through setting up EBA reactor and electron beam generator, turn into sulfur dioxide and nitrogen oxide in the flue gas into ammonium sulfate and ammonium nitrate, improve the efficiency of denitration, the ammonium sulfate and the ammonium nitrate that the reaction obtained can be used as high-quality chemical fertilizer, comprehensive running cost is low.
Description
Technical Field
The utility model relates to an environmental protection equipment technical field specifically is a blast furnace flue afterbody denitration purifier.
Background
The emission amount of NOx discharged by an industrial boiler accounts for more than 30 percent of the total NOx discharged in China, the emission amount of NOx is a main air pollution source of large and medium-sized cities in China, NOx discharged into air can form acid rain and photochemical smog to damage the ozone layer, so that a greenhouse effect is caused, the natural environment and the health of human beings, animals and plants are seriously damaged, at present, purification equipment such as desulfurization, denitrification and the like are mostly added in industrial boilers in China, but in the actual implementation, the fact that in an SCR denitrification process, flue gas discharged by the boiler can be uniformly sent into an SCR reactor to be denitrated can be found, the SCR reactor has requirements on the temperature of the flue gas entering the SCR reactor, the temperature of the flue gas is required to be in the range of 290-430 ℃, the SCR reactor can be ensured to be smoothly and effectively carried out, the content of NOx in the flue gas finally discharged by the boiler can reach the emission standard specified by the state, and due to the difference of environmental temperature and, the temperature of the discharged flue gas is high or low, the normal working temperature of the SCR low-temperature catalyst material applied to flue gas denitration is between 80 ℃ and 300 ℃, if the reaction temperature is low, the activity of the catalyst is reduced, so that the denitration efficiency is reduced, if the catalyst is continuously operated at low temperature, the catalyst is permanently damaged, if the reaction temperature is too high, the generation amount of NOx is increased, the phase change of the catalyst material is caused, the activity of the catalyst material is degraded, the service life of the catalyst material is shortened, in addition, the denitration efficiency of the SCR reactor is about 70%, and other denitration purification equipment must be added to achieve a better emission standard.
The CFB boiler SNCR + SCR mixed method flue gas denitration system that discloses in china utility model patent application publication specification CN102716665U, SCR denitration reactor among this mixed method flue gas denitration system can't regulate and control the temperature, be not convenient for create good denitration temperature environment, the temperature of honeycomb formula or board-like catalyst work can not be ensured, influence the life and the effect of denitration of honeycomb formula or board-like catalyst, furthermore, SNCR + SCR mixed method flue gas denitration system is along with the increase of live time, the efficiency of denitration reduces gradually, if there is not other supplementary denitration purifier, can't satisfy the requirement of following new environmental protection standard, increase the cost of enterprise's operation.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides a blast furnace flue afterbody denitration purifier, the problem of proposing in the above-mentioned background art has been solved to the not enough of prior art.
(II) technical scheme
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the reactor comprises a shell, one side upper portion fixedly connected with SCR reaction vessel of casing, the second temperature control chamber has been seted up to SCR reaction vessel's inside, the opposite side upper portion fixedly connected with EBA reactor of casing, the last fixed surface of EBA reactor is connected with electron beam generator.
Optionally, the inner side wall of the SCR reaction vessel is fixedly connected with a catalytic plate, the upper surface of the SCR reaction vessel is fixedly connected with a second exhaust pipe, and the second exhaust pipe penetrates through the inner top wall of the casing.
Optionally, the upper part of one side of the SCR reaction vessel is fixedly connected with a second connecting pipe, and one end of the second connecting pipe is fixedly connected with the EBA reactor.
Optionally, a collecting box is arranged at the lower part of the other side of the shell, and a cyclone collector is arranged at the upper part of the collecting box.
Optionally, one side of the lower surface of the EBA reactor is fixedly connected with a third connecting pipe, one end of the third connecting pipe is fixedly connected with the cyclone collector, the upper surface of the cyclone collector is inserted with a smoke exhaust pipe, and the smoke exhaust pipe penetrates through the shell.
Optionally, the lower part of one side of the casing is fixedly connected with an SNCR reaction container, a first temperature control cavity is formed in the SNCR reaction container, and a flue gas pipeline is fixedly connected to the inner bottom wall of the SNCR reaction container.
Optionally, one side from the top down of SNCR reaction vessel fixedly connected with ammonia conveyer pipe and first exhaust pipe in proper order, flue gas pipeline, first exhaust pipe and ammonia conveyer pipe all run through the casing.
Optionally, one end of the ammonia gas delivery pipe is fixedly connected with an air injection disc, and one side of the air injection disc is fixedly connected with an air injection head.
Optionally, the inner top wall of the SNCR reaction vessel is fixedly connected with a first connecting pipe, the upper end of the first connecting pipe is fixedly connected with the SCR reaction vessel, and the first connecting pipe and the second connecting pipe are both fixedly connected with a gas thermometer.
Optionally, one side middle part fixedly connected with admission line of casing, one side from the top down of admission line fixedly connected with first gas flow control valve and second gas flow control valve in proper order, admission line's upper end and SCR reaction vessel fixed connection, admission line's lower extreme and SNCR reaction vessel fixed connection.
(III) advantageous effects
The utility model provides a blast furnace flue afterbody denitration purifier possesses following beneficial effect:
1. this blast furnace flue afterbody denitration purifier through setting up first temperature control chamber and second temperature control chamber, fills the high temperature steam in the stove in first temperature control chamber and second temperature control intracavity, provides the suitable denitration temperature of SNCR reaction vessel and SCR reaction vessel, strengthens the catalytic effect of catalysis board, guarantees that the blast furnace flue gas is purified by the denitration smoothly, reduces the energy consumption, reduces clarification plant's running cost, realizes recycling economy.
2. This blast furnace flue afterbody denitration purifier through setting up EBA reactor and electron beam generator, uses the high energy electron beam irradiation blast furnace flue gas that electron beam generator sent, turns into sulfur dioxide and nitrogen oxide in the flue gas ammonium sulfate and ammonium nitrate, not only can improve the efficiency of denitration, and does not produce secondary pollutant, and the ammonium sulfate and the ammonium nitrate that react and obtain can be used as high-quality chemical fertilizer, and comprehensive running cost is low.
Drawings
FIG. 1 is a schematic sectional view of the present invention;
FIG. 2 is an enlarged schematic view of the structure of FIG. 1;
FIG. 3 is a schematic structural view of the jet plate of the present invention;
fig. 4 is a schematic top view of the catalytic plate of the present invention.
In the figure: 1. a housing; 2. an SNCR reaction vessel; 3. a first temperature control chamber; 4. a flue gas duct; 5. a first exhaust pipe; 6. an ammonia gas delivery pipe; 7. an air jet disc; 8. a gas showerhead; 9. an air intake duct; 10. a first gas flow control valve; 11. a second gas flow control valve; 12. a first connecting pipe; 13. an SCR reaction vessel; 14. a second temperature control chamber; 15. a catalyst plate; 16. a second connecting pipe; 17. an EBA reactor; 18. an electron beam generator; 19. a third connecting pipe; 20. a collection box; 21. a cyclone collector; 22. a smoke exhaust pipe; 23. a second exhaust pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1 to 4, the present invention provides a technical solution: a denitration and purification device for the tail part of a blast furnace flue comprises a shell 1, an SCR reaction container 13 is fixedly connected to the upper part of one side of the shell 1, a second temperature control cavity 14 is formed in the SCR reaction container 13, a catalytic plate 15 is fixedly connected to the inner side wall of the SCR reaction container 13, the catalytic plate 15 is made of titanium dioxide and vanadium pentoxide, the catalytic plate 15 is honeycomb-shaped, a second exhaust pipe 23 is fixedly connected to the upper surface of the SCR reaction container 13, the second exhaust pipe 23 penetrates through the inner top wall of the shell 1, a second connecting pipe 16 is fixedly connected to the upper part of one side of the SCR reaction container 13, one end of the second connecting pipe 16 is fixedly connected with an EBA reactor 17, the upper part of the other side of the shell 1 is fixedly connected with an EBA reactor 17, an electron beam generator 18 is fixedly connected to the upper surface of the EBA reactor 17, and the high-energy electron beam emitted by the electron beam generator 18 is used for irradiating high-energy, the method has the advantages that sulfur dioxide and nitric oxide in flue gas are converted into ammonium sulfate and ammonium nitrate, the denitration efficiency can be improved, secondary pollutants are not generated, the ammonium sulfate and ammonium nitrate obtained through reaction can be used as high-quality chemical fertilizers, the comprehensive operation cost is low, the lower part of the other side of the shell 1 is provided with the collecting box 20, the upper part of the collecting box 20 is provided with the cyclone collector 21, one side of the lower surface of the EBA reactor 17 is fixedly connected with the third connecting pipe 19, one end of the third connecting pipe 19 is fixedly connected with the cyclone collector 21, the upper surface of the cyclone collector 21 is spliced with the smoke exhaust pipe 22, the smoke exhaust pipe 22 penetrates through the shell 1, the lower part of one side of the shell 1 is fixedly connected with the SNCR reaction container 2, the first temperature control cavity 3 is arranged inside the SNCR reaction container 2, and high-temperature hot gas in the first temperature control cavity 3 and the second temperature control cavity 14 is filled in the, the appropriate denitration temperature is provided for the SNCR reaction vessel 2 and the SCR reaction vessel 13, the catalytic effect of the catalytic plate 15 is enhanced, the smooth denitration and purification of blast furnace flue gas are ensured, the energy consumption is reduced, the operation cost of a purifying device is reduced, the circular economy is realized, the inner bottom wall of the SNCR reaction vessel 2 is fixedly connected with a flue gas pipeline 4, one side of the SNCR reaction vessel 2 is fixedly connected with an ammonia conveying pipe 6 and a first exhaust pipe 5 from top to bottom in sequence, the flue gas pipeline 4, the first exhaust pipe 5 and the ammonia conveying pipe 6 all penetrate through the shell body 1, one end of the ammonia conveying pipe 6 is fixedly connected with an air injection disc 7, one side of the air injection disc 7 is fixedly connected with an air injection head 8, the inner top wall of the SNCR reaction vessel 2 is fixedly connected with a first connecting pipe 12, the upper end of the first connecting pipe 12 is fixedly connected with the SCR reaction vessel 13, the middle part of one side of casing 1 fixedly connected with admission line 9, one side from the top down of admission line 9 fixedly connected with first gas flow control valve 10 and second gas flow control valve 11 in proper order, the upper end and the SCR reaction vessel 13 fixed connection of admission line 9, the lower extreme and the SNCR reaction vessel 2 fixed connection of admission line 9.
The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.
When the high-temperature flue gas denitration device is used, high-temperature flue gas generated by a blast furnace is input into a flue gas pipeline 4, the flue gas enters an SNCR reaction container 2, abundant hot gas in the blast furnace is input into an air inlet pipeline 9, a second gas flow control valve 11 is opened, the abundant hot gas in the blast furnace enters a first temperature control cavity 3 through the air inlet pipeline 9 and the second gas flow control valve 11, the temperature of the SNCR reaction container 2 is raised by the abundant hot gas in the blast furnace and the high-temperature flue gas together, a temperature environment beneficial to denitration is created, a gas thermometer on a first connecting pipe 12 detects the temperature of gas discharged from the upper part of the SNCR reaction container 2, when the temperature of the gas in the SNCR reaction container 2 is raised to be suitable for reduction reaction, industrial ammonia gas is input into an ammonia gas conveying pipe 6, the ammonia gas is sprayed out by a gas spraying head 8 through a spraying disc 7, the ammonia gas is pyrolyzed and then reacts, the hot gas in the first temperature control cavity 3 is discharged into the blast furnace again through the first exhaust pipe 5, then the excessive ammonia gas, the blast furnace flue gas and the nitrogen generated by the reaction enter the first connecting pipe 12 together, a gas thermometer on the first connecting pipe 12 detects the temperature of the passing gas, if the temperature is lower than 300 ℃, the first gas flow control valve 10 is opened, the abundant hot gas in the blast furnace enters the second temperature control cavity 14 through the gas inlet pipeline 9 and the first gas flow control valve 10, the temperature of the SCR reaction container 13 is improved, the excessive ammonia gas, the blast furnace flue gas and the ammonia gas enter the SCR reaction container 13, the ammonia gas selectively reacts with the nitrogen oxide to generate nitrogen gas and water under the action of a metal catalyst on the catalytic plate 15, the reaction efficiency is improved by the metal catalyst on the catalytic plate 15, if the gas thermometer on the second connecting pipe 16 detects that the temperature of the gas discharged from the SCR reaction container 13 is lower than 300 ℃, the flow of the rich hot gas of the blast furnace passing through the first gas flow control valve 10 is increased, so that more hot gas enters the second temperature control chamber 14, the reaction temperature is increased, the hot gas in the second temperature control chamber 14 is discharged into the blast furnace again through the second exhaust pipe 23, the specific reaction principle of the SNCR reaction vessel 2 and the SCR reaction vessel 13 refers to an SNCR and SCR mixed denitration system disclosed in the Chinese patent application publication No. CN103691293B, the detailed principle is not repeated, the flue gas, nitrogen, ammonia and hot steam which are not purified enter the EBA reactor 17 through the second connecting pipe 16, the electron beam generator 18 generates high-energy electron beams, the flue gas which is not purified is irradiated, and sulfide and nitrogen oxides in the flue gas react with ammonia under the action of the high-energy electron beams to generate ammonium sulfate particles and ammonium nitrate particles, the specific principle refers to an electron beam desulfurization and denitration method and device for flue gas disclosed in the Chinese patent application publication No. CN104258702B, detailed principle is not described again, then ammonium sulfate particle and ammonium nitrate particle get into cyclone collector 21 via third connecting pipe 19, the air current rotates in cyclone collector 21, ammonium sulfate particle and ammonium nitrate particle are because centrifugal force strikes on cyclone collector 21's inner wall, later the landing to in collecting box 20, specific principle refers to a cyclone dust collector that china utility model patent application publication No. CN207970598U disclosed, detailed principle is not repeated again, the air after the purification is rotatory and is risen at cyclone collector 21's central part, discharge via exhaust pipe 22, after the collecting box 20 is full of ammonium sulfate particle and ammonium nitrate particle, take out collecting box 20 from casing 1, pour out ammonium sulfate particle and ammonium nitrate particle, can be used as fertilizer.
The utility model discloses a theory of operation and beneficial effect: under the action of high-energy electron beams, sulfide and nitric oxide in blast furnace flue gas react with ammonia gas to generate ammonium sulfate particles and ammonium nitrate particles, the EBA reactor 17 and the electron beam generator 18 are arranged, the high-energy electron beams emitted by the electron beam generator 18 are used for irradiating the blast furnace flue gas to convert sulfur dioxide and nitric oxide in the flue gas into ammonium sulfate and ammonium nitrate, so that the denitration efficiency can be improved, secondary pollutants are not generated, the ammonium sulfate and ammonium nitrate obtained by reaction can be used as high-quality fertilizers, the comprehensive operation cost is low, the first temperature control cavity 3 and the second temperature control cavity 14 are arranged, high-temperature hot gas in the furnace is filled in the first temperature control cavity 3 and the second temperature control cavity 14, the high-temperature hot gas is provided for the SNCR reaction vessel 2 and the SCR reaction vessel 13 at proper denitration temperature, the catalytic effect of the catalytic plate 15 is enhanced, and the smooth denitration and purification of the blast furnace flue gas is ensured, the energy consumption is reduced, the operation cost of the purifying equipment is reduced, and the circular economy is realized.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides a blast furnace flue afterbody denitration purifier, includes casing (1), its characterized in that: the reactor is characterized in that an SCR reaction container (13) is fixedly connected to the upper portion of one side of the shell (1), a second temperature control cavity (14) is formed in the SCR reaction container (13), an EBA reactor (17) is fixedly connected to the upper portion of the other side of the shell (1), and an electron beam generator (18) is fixedly connected to the upper surface of the EBA reactor (17).
2. The blast furnace flue tail denitration purification device of claim 1, characterized in that: the inside wall fixedly connected with catalysis board (15) of SCR reaction container (13), the last fixed surface of SCR reaction container (13) is connected with second blast pipe (23), interior roof of casing (1) is run through in second blast pipe (23).
3. The blast furnace flue tail denitration purification device of claim 1, characterized in that: the upper part of one side of the SCR reaction container (13) is fixedly connected with a second connecting pipe (16), and one end of the second connecting pipe (16) is fixedly connected with the EBA reactor (17).
4. The blast furnace flue tail denitration purification device of claim 1, characterized in that: a collecting box (20) is arranged at the lower part of the other side of the shell (1), and a cyclone collector (21) is arranged at the upper part of the collecting box (20).
5. The denitration purification device for the tail part of the flue of the blast furnace according to any one of claims 1 or 4, characterized in that: one side of the lower surface of the EBA reactor (17) is fixedly connected with a third connecting pipe (19), one end of the third connecting pipe (19) is fixedly connected with a cyclone collector (21), the upper surface of the cyclone collector (21) is spliced with a smoke exhaust pipe (22), and the smoke exhaust pipe (22) penetrates through the shell (1).
6. The blast furnace flue tail denitration purification device of claim 1, characterized in that: one side lower part fixedly connected with SNCR reaction vessel (2) of casing (1), first temperature control chamber (3) have been seted up to the inside of SNCR reaction vessel (2), the interior diapire fixedly connected with flue gas pipeline (4) of SNCR reaction vessel (2).
7. The blast furnace flue tail denitration purification device of claim 6, characterized in that: one side from the top down of SNCR reaction vessel (2) is fixedly connected with ammonia conveyer pipe (6) and first exhaust pipe (5) in proper order, casing (1) is all run through in flue gas pipeline (4), first exhaust pipe (5) and ammonia conveyer pipe (6).
8. The denitration purification device for the tail part of the blast furnace flue according to claim 7, characterized in that: one end of the ammonia gas conveying pipe (6) is fixedly connected with an air injection disc (7), and one side of the air injection disc (7) is fixedly connected with an air injection head (8).
9. The blast furnace flue tail denitration purification device of claim 6, characterized in that: the inner top wall of the SNCR reaction container (2) is fixedly connected with a first connecting pipe (12), the upper end of the first connecting pipe (12) is fixedly connected with the SCR reaction container (13), and the first connecting pipe (12) and the second connecting pipe (16) are both fixedly connected with a gas thermometer.
10. The blast furnace flue tail denitration purification device of claim 1, characterized in that: one side middle part fixedly connected with admission line (9) of casing (1), one side from the top down of admission line (9) is first gas flow control valve (10) and second gas flow control valve (11) of fixedly connected with in proper order, the upper end and the SCR reaction vessel (13) fixed connection of admission line (9), the lower extreme and SNCR reaction vessel (2) fixed connection of admission line (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921787140.2U CN210874842U (en) | 2019-10-23 | 2019-10-23 | Blast furnace flue afterbody denitration purifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921787140.2U CN210874842U (en) | 2019-10-23 | 2019-10-23 | Blast furnace flue afterbody denitration purifier |
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| CN210874842U true CN210874842U (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921787140.2U Active CN210874842U (en) | 2019-10-23 | 2019-10-23 | Blast furnace flue afterbody denitration purifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790460A (en) * | 2021-08-19 | 2021-12-14 | 北京华远意通热力科技股份有限公司 | Safe low-nitrogen emission control system and method |
-
2019
- 2019-10-23 CN CN201921787140.2U patent/CN210874842U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790460A (en) * | 2021-08-19 | 2021-12-14 | 北京华远意通热力科技股份有限公司 | Safe low-nitrogen emission control system and method |
| CN113790460B (en) * | 2021-08-19 | 2022-05-06 | 北京华远意通热力科技股份有限公司 | Safe low-nitrogen emission control system and method |
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