CN116592628A - Ultra-low emission tunnel kiln - Google Patents
Ultra-low emission tunnel kiln Download PDFInfo
- Publication number
- CN116592628A CN116592628A CN202310804758.XA CN202310804758A CN116592628A CN 116592628 A CN116592628 A CN 116592628A CN 202310804758 A CN202310804758 A CN 202310804758A CN 116592628 A CN116592628 A CN 116592628A
- Authority
- CN
- China
- Prior art keywords
- reaction chamber
- tunnel
- temperature reaction
- temperature
- high temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 60
- 239000000779 smoke Substances 0.000 claims abstract description 24
- 238000002485 combustion reaction Methods 0.000 claims abstract description 22
- 239000011449 brick Substances 0.000 claims description 12
- 238000005192 partition Methods 0.000 claims description 7
- 238000010304 firing Methods 0.000 claims 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 27
- 239000003546 flue gas Substances 0.000 abstract description 27
- 239000003638 chemical reducing agent Substances 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 6
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract description 2
- 239000003517 fume Substances 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- -1 amino compound Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to the technical field of flue gas denitration, and provides an ultralow-emission tunnel kiln which comprises a combustion tunnel and a high-temperature reaction chamber, wherein the combustion tunnel is communicated with the high-temperature reaction chamber, and the high-temperature reaction chamber is provided with a smoke outlet and a reagent injection port. Through above-mentioned technical scheme, solved among the prior art reductant directly annotate into the mixed department of discharging fume of combustion zone, the temperature of flue gas drops too fast for the temperature is not enough to realize perfect denitration effect, leads to the problem that denitration effect is not good.
Description
Technical Field
The invention relates to the technical field of flue gas denitration, in particular to an ultralow emission tunnel kiln.
Background
SNCR is a selective non-catalytic reduction, a mature low cost denitration technique. The technology takes a hearth or a pre-decomposition furnace in the cement industry as a reactor, and sprays a reducing agent containing amino into the hearth, wherein the reducing agent and NO in flue gas X And (3) reacting to generate ammonia and water. In the denitration process by a selective non-catalytic reduction method, urea or amino compound is injected into smoke at a higher reaction temperature (930-1090 ℃) to add NO X Reduction to N 2 . The reductant is typically injected into the furnace or flue proximate the furnace outlet.
NO of SNCR process X The removal efficiency of (2) is mainly determined by the reaction temperature and NH 3 With NO X Stoichiometry, degree of mixing, reaction time, etc. Studies have shown that temperature control of the SNCR process is critical. If the temperature is too low, NH 3 The reaction of (2) is incomplete. Is easy to cause NH 3 Leakage; while the temperature is too high, NH 3 Is easily oxidized to NO X Counteract NH 3 Is not limited, and the removal effect of the catalyst is realized. Too high or too low a temperature can lead to loss of reductant and NO X The removal rate is reduced. Generally, a reasonably designed SNCR process can achieve a removal efficiency of up to 30% -50%.
In the prior art, the reducing agent is generally directly injected into the smoke outlet of the combustion area, the red bricks or refractory bricks are fully filled in the combustion area, the smoke temperature of the smoke outlet is above 800 ℃, the temperature is immediately reduced after the smoke outlet is mixed due to wider space, and under the temperature, the smoke and the reducing agent are difficult to fully mix, so that the denitration effect is poor, and a scheme is provided to solve the problem.
Disclosure of Invention
The invention provides an ultralow emission tunnel kiln, which solves the problems that in the related art, a reducing agent is directly injected into a smoke discharging mixing part of a combustion zone, the temperature of smoke is reduced too fast, so that a perfect denitration effect is not realized sufficiently, and the denitration effect is poor.
The technical scheme of the invention is as follows: the ultra-low emission tunnel kiln comprises a combustion tunnel, a high-temperature reaction chamber is additionally arranged, the combustion tunnel is communicated with the high-temperature reaction chamber, the high-temperature reaction chamber is provided with a smoke outlet and a reagent injection port, a sealing cover is arranged on the combustion tunnel in a sliding manner, a lifting handle is arranged on the sealing cover, and the sealing cover is used for plugging or opening the smoke outlet after sliding.
As a further technical scheme, the high-temperature reaction chamber is provided with a smoke inlet, and the combustion tunnel is communicated with the high-temperature reaction chamber through the smoke inlet.
As a further technical scheme, a plurality of partition plates are arranged in the high-temperature reaction chamber, and the partition plates are arranged on the inner wall of the high-temperature reaction chamber in a crossing manner.
As a further technical scheme, the device further comprises a carriage track and a brick burning vehicle, wherein the carriage track is arranged in the combustion tunnel, and the brick burning vehicle is arranged on the carriage track in a sliding manner.
The working principle and the beneficial effects of the invention are as follows: in the prior art, the denitration process is implemented in a combustion zone, the internal space is larger, the red bricks with small gaps are fully filled, the temperature falling rate is too high in the reaction process, the injected reducing agent and the flue gas are difficult to meet the temperature of full reaction, the reaction of the reducing agent and nitrogen oxides in the flue gas is not complete enough, the denitration efficiency is very low, the high-temperature reaction chamber communicated with the combustion tunnel is additionally arranged, after the high-temperature flue gas is generated in the combustion tunnel, the high-temperature flue gas enters the high-temperature reaction chamber, the reaction space is smaller, after the high-temperature flue gas enters the smaller space, the reaction space before comparison, the flue gas temperature can be kept at the original temperature within a certain time, the temperature falling rate is slower, at the moment, the reaction of the flue gas and the reducing agent is more complete, after the reducing agent is filled into a spray gun, the high-temperature reaction chamber is injected through the injection port, the reducing agent is enabled to react with the high-temperature flue gas, a sealing cover capable of sliding up and down, the sealing cover is arranged at the position of the high-temperature flue gas, the sealing cover is capable of realizing the high-temperature sealing cover to enter the high-temperature reaction chamber, after the high-temperature sealing cover is completely, the high-temperature sealing cover is enabled to completely seal the high temperature reaction chamber, the high temperature flue gas can be completely, the high temperature sealing cover is completely, and the flue gas is completely discharged, and the high temperature reaction is completely, and has been completely removed.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a block diagram of an ultra-low emission tunnel kiln of the present invention;
FIG. 2 is an exploded view of the structure of the ultra-low emission tunnel kiln of the present invention;
FIG. 3 is an enlarged view of the structure of FIG. 2A in accordance with the present invention;
in the figure: 1. the device comprises a combustion tunnel, 2 high-temperature reaction chambers, 3, a smoke outlet, 4, an injection port, 5, a smoke inlet, 6, a partition board, 7, a sealing cover, 8, a lifting handle, 9, a carriage track, 10 and a brick burning vehicle.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-3, this embodiment provides an ultra-low emission tunnel kiln, including burning tunnel 1, add high temperature reaction chamber 2, burning tunnel 1 with high temperature reaction chamber 2 communicates, high temperature reaction chamber 2 has exhaust port 3 and annotates agent mouth 4, sealed lid 7 slides and sets up on burning tunnel 1, be provided with on the sealed lid 7 and promote handle 8, sealed lid 7 is used for shutoff or opens exhaust port 3 after sliding.
In this embodiment, add a high temperature reaction chamber 2 that communicates with burning tunnel 1, after producing high temperature flue gas in burning tunnel 1, high temperature flue gas gets into high temperature reaction chamber 2, the space of reaction is less, after high temperature flue gas gets into less space, bigger reaction space before contrast, flue gas temperature can keep former temperature in certain time, and the temperature decline speed slows down, flue gas temperature that this moment satisfies the required temperature of denitration reaction, the reaction that flue gas and reductant contact take place is more complete, pack into the spray gun with the reductant after, pour into high temperature reaction chamber 2 through annotating agent mouth 4 for reductant and high temperature flue gas reaction into, set up a sealed lid 7 that can shutoff exhaust port 3 in exhaust port 3 department, its sealed lid 7 can slide from top to bottom, after the promotion handle 8 on sealed lid 7 realizes the shutoff of exhaust port 3, make high temperature flue gas can be in airtight high temperature reaction chamber 2 complete the reaction, open sealed lid 7 again, make harmless gas discharge through port 3, and then realize satisfying the temperature that high temperature flue gas completes denitration reaction, make it more complete.
Further, the method also comprises the steps of,
the high-temperature reaction chamber 2 is provided with a smoke inlet 5, and the combustion tunnel 1 is communicated with the high-temperature reaction chamber 2 through the smoke inlet 5.
In this embodiment, the high temperature reaction chamber 2 is communicated with the combustion tunnel 1 through the smoke inlet 5, and when the combustion tunnel 1 burns, the generated high temperature smoke enters the high temperature reaction chamber 2 through the smoke inlet 5, and the high temperature smoke still keeps its temperature due to the small space of the high temperature reaction chamber 2, so that the smoke and the reducing agent can fully react.
Further, the method also comprises the steps of,
a plurality of partition boards 6 are arranged in the high-temperature reaction chamber 2, and the partition boards 6 are arranged on the inner wall of the high-temperature reaction chamber 2 in a crossing way.
In this embodiment, through a plurality of baffles 6 of crossing setting up in high temperature reaction room 2 both sides for form a simple and easy tunnel in the high temperature reaction room 2, high temperature flue gas passes through the inlet flue and gets into behind the high temperature reaction room 2, makes it have certain flow space, and high temperature flue gas can flow along simple and easy tunnel in high temperature reaction room 2, and the high temperature flue gas that flows is more convenient takes place denitration reaction with the reductant more, makes the reaction more abundant.
Further, the method also comprises the steps of,
the brick burning device comprises a carriage track 9 and a brick burning vehicle 10, wherein the carriage track 9 is arranged in the burning tunnel 1, and the brick burning vehicle 10 is arranged on the carriage track 9 in a sliding manner.
In this embodiment, through the carriage track 9 in the combustion tunnel 1, the brick burning vehicle 10 carrying the combustion materials can move on the carriage track 9, flow along the tunnel towards the kiln head direction under the action of the chimney or the induced draft fan at the front section of the tunnel kiln, and preheat the products entering the kiln step by step to form a preheating zone of the tunnel kiln.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
1. The utility model provides an ultralow emission tunnel cave, includes burning tunnel (1), its characterized in that still includes high temperature reaction chamber (2), sealed lid (7) and promotes handle (8), burning tunnel (1) with high temperature reaction chamber (2) intercommunication, high temperature reaction chamber (2) have exhaust port (3) and annotate agent mouth (4), sealed lid (7) slip setting is in on burning tunnel (1), be provided with on sealed lid (7) and promote handle (8), sealed lid (7) are used for shutoff or open exhaust port (3) after sliding.
2. The ultra-low emission tunnel kiln according to claim 1, characterized in that the high temperature reaction chamber (2) has a smoke inlet (5), the combustion tunnel (1) being in communication with the high temperature reaction chamber (2) through the smoke inlet (5).
3. The ultra-low emission tunnel kiln according to claim 1, characterized in that a plurality of partitions (6) are arranged in the high temperature reaction chamber (2), and the partitions (6) are arranged on the inner wall of the high temperature reaction chamber (2) in a crossing manner.
4. The ultra-low emission tunnel kiln according to claim 1, further comprising a carriage track (9) and a brick firing vehicle (10), wherein the carriage track (9) is arranged in the combustion tunnel (1), and wherein the brick firing vehicle (10) is slidably arranged on the carriage track (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310804758.XA CN116592628A (en) | 2023-07-03 | 2023-07-03 | Ultra-low emission tunnel kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310804758.XA CN116592628A (en) | 2023-07-03 | 2023-07-03 | Ultra-low emission tunnel kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116592628A true CN116592628A (en) | 2023-08-15 |
Family
ID=87604670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310804758.XA Pending CN116592628A (en) | 2023-07-03 | 2023-07-03 | Ultra-low emission tunnel kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116592628A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH118408A (en) * | 1924-12-02 | 1927-01-03 | Victor Selliez | Process for firing and cooling ceramic products in a tunnel kiln and installation for its implementation. |
| CN102434888A (en) * | 2011-11-15 | 2012-05-02 | 冯之军 | Device and method for high polymer material burning harmless treatment |
| CN106854684A (en) * | 2016-12-27 | 2017-06-16 | 甘肃酒钢集团宏兴钢铁股份有限公司 | One kind is used for iron ore magnetizing roast tunnel cave and iron ore magnetizing roast method |
| CN210741140U (en) * | 2019-11-13 | 2020-06-12 | 万年县万年青新型建材有限公司 | Smoke-heat separation device for sintering porous shale bricks |
| CN111495143A (en) * | 2020-05-13 | 2020-08-07 | 东南大学 | SCR denitration system and method suitable for hazardous waste incinerator |
| CN212575883U (en) * | 2020-06-15 | 2021-02-23 | 平顶山中业环保科技有限公司 | Desulfurization and denitrification device for brick kiln |
| CN213481036U (en) * | 2020-09-27 | 2021-06-18 | 黄冈市华窑中亚窑炉有限责任公司 | Tunnel cave flue gas circulated processing apparatus |
| CN214172990U (en) * | 2020-12-07 | 2021-09-10 | 曲靖市沾益区祥达建材有限公司 | Waste heat utilization device of tunnel kiln |
| CN216620690U (en) * | 2021-09-26 | 2022-05-27 | 郑州通达耐材有限责任公司 | Exhaust emission monitoring system |
-
2023
- 2023-07-03 CN CN202310804758.XA patent/CN116592628A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH118408A (en) * | 1924-12-02 | 1927-01-03 | Victor Selliez | Process for firing and cooling ceramic products in a tunnel kiln and installation for its implementation. |
| CN102434888A (en) * | 2011-11-15 | 2012-05-02 | 冯之军 | Device and method for high polymer material burning harmless treatment |
| CN106854684A (en) * | 2016-12-27 | 2017-06-16 | 甘肃酒钢集团宏兴钢铁股份有限公司 | One kind is used for iron ore magnetizing roast tunnel cave and iron ore magnetizing roast method |
| CN210741140U (en) * | 2019-11-13 | 2020-06-12 | 万年县万年青新型建材有限公司 | Smoke-heat separation device for sintering porous shale bricks |
| CN111495143A (en) * | 2020-05-13 | 2020-08-07 | 东南大学 | SCR denitration system and method suitable for hazardous waste incinerator |
| CN212575883U (en) * | 2020-06-15 | 2021-02-23 | 平顶山中业环保科技有限公司 | Desulfurization and denitrification device for brick kiln |
| CN213481036U (en) * | 2020-09-27 | 2021-06-18 | 黄冈市华窑中亚窑炉有限责任公司 | Tunnel cave flue gas circulated processing apparatus |
| CN214172990U (en) * | 2020-12-07 | 2021-09-10 | 曲靖市沾益区祥达建材有限公司 | Waste heat utilization device of tunnel kiln |
| CN216620690U (en) * | 2021-09-26 | 2022-05-27 | 郑州通达耐材有限责任公司 | Exhaust emission monitoring system |
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