CN220169990U - Hot flue gas device is got to mixed combustion lime shaft kiln - Google Patents
Hot flue gas device is got to mixed combustion lime shaft kiln Download PDFInfo
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- CN220169990U CN220169990U CN202223493133.6U CN202223493133U CN220169990U CN 220169990 U CN220169990 U CN 220169990U CN 202223493133 U CN202223493133 U CN 202223493133U CN 220169990 U CN220169990 U CN 220169990U
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- China
- Prior art keywords
- flue gas
- kiln
- mixed
- pipe
- lime
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 239000003546 flue gas Substances 0.000 title claims abstract description 89
- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 32
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 32
- 239000004571 lime Substances 0.000 title claims abstract description 32
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 16
- 239000000779 smoke Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000000428 dust Substances 0.000 claims description 12
- 238000000605 extraction Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 238000006477 desulfuration reaction Methods 0.000 claims description 6
- 230000023556 desulfurization Effects 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000011449 brick Substances 0.000 claims 1
- 239000003054 catalyst Substances 0.000 abstract description 8
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 238000002156 mixing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Chimneys And Flues (AREA)
Abstract
The utility model discloses a heat-taking flue gas device for a mixed-combustion lime shaft kiln. The heat-taking flue gas device for the mixed-combustion lime shaft kiln is characterized in that an annular steel sleeve and an annular flue gas pipeline are newly arranged in the kiln body. The sleeve is extended into the position of 400 ℃ below the material surface of the kiln body, a cavity is formed between the sleeve and the inner wall of the shaft kiln, and smoke rising along the inner wall of the kiln body upwards enters the annular flue arranged at the uppermost layer through the cavity and then is connected with the kiln body through two pipelines. The newly added hot flue gas pipeline is mixed with the flue gas pipeline of the original kiln body, so that the temperature of the flue gas is raised to 240-280 ℃, the high-temperature environment for normal use of the denitration catalyst is met, the high energy required by additional heating is avoided, and the production cost is saved.
Description
Technical Field
The utility model relates to the technical field of flue gas denitration, in particular to a hot flue gas taking device of a mixed-combustion lime shaft kiln.
Background
Nitrogen oxides are one of the important pollution sources of the atmosphere, and the pollution hazard is great, so in seventies, the research on flue gas denitration technology is manyThe country is focused on preventing and treating the atmospheric pollution, and a plurality of practical treatment devices on an industrial scale are built successively. The prior flue gas denitration treatment method mainly comprises the following steps: SCR, SNCR and SCR/SNCRL combined technologies, etc., the denitration catalyst is the core and key of the several treatment systems. For example, SCR denitration is to reduce NO in flue gas to N in the presence of oxygen by using ammonia, CO or hydrocarbon as a reducing agent in the presence of a catalyst 2 . NH as reductant for SCR reactions 3 、CO、H 2 And also methane, ethylene, propane, propylene, etc.
The use temperature of the conventional denitration catalyst in the current market is 180-600 ℃. However, if the temperature of the flue gas at the top of the mixed-combustion lime shaft kiln is 120-200 ℃, the flue gas directly enters a denitration device, no matter which denitration process is adopted, the temperature condition of normal use of the denitration catalyst can not be met, and when the temperature condition can not be reached, the denitration catalyst can not play a catalytic role, so that the denitration work is greatly influenced. However, if the flue gas temperature is increased by means of additional heating, a corresponding heating device needs to be established first, and a large amount of heat source or gas is required, and this heating method generates huge operation cost, resulting in a drastic increase of production cost, which is not suitable for wide-range use in factories.
Disclosure of Invention
The utility model aims to provide a heat-taking flue gas device for a mixed-combustion lime shaft kiln, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a heat flue gas device is got to lime shaft kiln of mixed combustion, includes sleeve and hot flue gas ring canal, the inner chamber at the lime kiln is installed to the built-in installation of section of thick bamboo, the sleeve stretches into below the charge level and forms annular cavity with the lime kiln inner wall, annular cavity is the flue gas ring canal at the inside resistant firebrick top of kiln body, gathers into a hot flue gas main pipe and inserts mixed flue gas pipe together with current kiln top flue gas main pipe at kiln top after drawing out the kiln body through two hot flue gas branch pipes, then inserts cyclone, and the flue gas that the dust removal of dust particles is low, temperature satisfies the requirement is provided for the desulfurization denitration system afterwards.
Preferably, the sleeve stretches into a region of 400 ℃ below the material level in the lime kiln, the sleeve and the inner wall of the lime kiln form an annular cavity, and uniform heat extraction is achieved by the cavity.
Preferably, the annular cavity communicates with a hot flue gas collar mounted on top of the refractory layer.
Preferably, the heat extraction flue gas is directly mixed with the existing flue gas.
Preferably, electric regulating valves are arranged on the pipelines of the hot flue gas main pipe and the existing flue gas main pipe, and a temperature sensor is arranged on the mixed flue gas pipe to control the temperature of the mixed flue gas within the range of 240-280 ℃.
Preferably, a cyclone dust collector is arranged on a pipeline of the mixed flue gas pipe in a butt joint way, so that the stable operation of a subsequent desulfurization and denitrification system is ensured.
Compared with the prior art, the utility model has the beneficial effects that:
1. the heat-taking flue gas device for the lime-mixed vertical kiln comprises a sleeve, an annular cavity, a hot flue gas ring pipe, a hot flue gas branch pipe and a flue gas main pipe, wherein the sleeve stretches into the position of the kiln body material layer at about 400 ℃, a cavity is formed between the sleeve and the inner wall of the kiln, and after hot flue gas upwards enters the annular flue through the cavity, the kiln body is connected through the hot flue gas branch pipe. Finally, the flue gas is mixed with the flue gas in the original flue gas main pipe in the mixed flue gas pipe, and the temperature of the flue gas is raised after mixing, so that the high-temperature environment for normal use of the denitration catalyst is met, the high energy required by additional heating is avoided, and the production cost is saved.
2. The heat-taking flue gas device for the mixed-combustion lime shaft kiln is characterized in that the temperature sensor, the electric regulating valve and the thermometer are matched, the temperature of flue gas is increased after mixing, and large-particle smoke dust is removed through the cyclone dust collector and then enters the medium-temperature SCR denitration system through a pipeline. The temperature sensor and the electric regulating valve can flexibly regulate the opening of the electric regulating valve according to the temperature requirement of a subsequent system and control the flue gas flow in the pipeline, so that the temperature of the mixed flue gas meets the requirement.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a front view of the present utility model.
In the figure: 1. a sleeve; 2. an annular cavity; 3. a hot flue gas loop; 4. a hot flue gas branch pipe; 5. a hot flue gas main pipe; 6. an electric control valve; 8. a flue gas main pipe; 10. a mixed flue gas pipe; 11. lime kiln.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-2, the present utility model provides a technical solution: the utility model provides a heat flue gas device is got to lime shaft kiln of mixed combustion, including sleeve 1 and hot flue gas ring canal 3, the inner chamber at lime kiln 11 is installed to 1 embeds of section of thick bamboo, sleeve 1 stretches into below the charge level and forms annular cavity 2 with lime kiln 11 inner wall, annular cavity 2 is flue gas ring canal 3 at the inside resistant firebrick top of kiln body, join into a hot flue gas main pipe 5 and current kiln top flue gas main pipe 8 and insert mixed flue gas pipe 10 together after drawing out the kiln body through two hot flue gas branch pipes 4, then insert cyclone 12 desorption large granule smoke and dust, provide the flue gas that the dust content is low, the temperature satisfies the requirement for the desulfurization denitration system afterwards.
In this embodiment, the flue gas generated in the lime kiln 11 continuously moves upwards along the kiln body, a part of flue gas is exhausted along the existing flue gas pipe at the top of the kiln body of the lime kiln 11, a part of flue gas enters the hot flue gas ring pipe 3 along the annular cavity 2, then enters the flue gas main pipe 5 through the confluence of the hot flue gas pipe 4, finally enters the mixed flue gas pipe 10 together with the flue gas in the existing flue gas pipe of the kiln body for mixing, and after mixing, the flue gas temperature is raised, thereby meeting the high-temperature environment for normal use of the denitration catalyst, avoiding the high energy required by additional heating, and saving the production cost.
Further, the sleeve 1 stretches into the area of 400 ℃ below the material level in the lime kiln 11, the sleeve 1 and the inner wall of the lime kiln 11 form an annular cavity 2, and uniform heat extraction is achieved by the aid of the cavity.
Further, the annular cavity 2 communicates with a hot flue gas collar 3 mounted on top of the refractory layer.
Further, the heat-taking flue gas is directly mixed with the existing flue gas.
Further, electric regulating valves 6 are arranged on the pipelines of the hot flue gas main pipe 5 and the flue gas main pipe 8, and a temperature sensor 13 is arranged on the mixed flue gas pipe 10, so that the temperature of the mixed flue gas is controlled within the range of 250-280 ℃.
Further, the cyclone dust collector 12 is installed on the pipeline of the mixed flue gas pipe 10 in a butt joint manner, so that the temperature operation of a subsequent desulfurization and denitrification system is guaranteed, the temperature sensor and the electric regulating valve can output the indication of the thermometer in the pipeline and flexibly regulate the opening of the electric regulating valve according to the temperature requirement of the subsequent system, and the flue gas flow in the pipeline is controlled, so that the temperature of the mixed flue gas meets the requirement.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a heat flue gas device is got to lime shaft kiln of mixed combustion, includes sleeve (1) and hot flue gas ring canal (3), its characterized in that: the lime kiln is characterized in that the sleeve (1) is internally arranged in an inner cavity of the lime kiln (11), the sleeve (1) stretches into the lower part of the material level and forms an annular cavity (2) with the inner wall of the lime kiln (11), the annular cavity (2) is arranged at the top of a refractory brick in the kiln body to form a smoke ring pipe (3), after the kiln body is led out of the kiln body through two hot smoke branch pipes (4), the hot smoke main pipe (5) and the existing kiln top smoke main pipe (8) are connected into the mixed smoke pipe (10) together, and then the mixed smoke pipe is connected into the cyclone dust collector (12) to remove large-particle smoke dust, so that the smoke with low dust content and temperature meeting requirements is provided for a later desulfurization and denitrification system.
2. The heat extraction flue gas device of the mixed-combustion lime shaft kiln, according to claim 1, is characterized in that: the sleeve (1) stretches into a region below the material level in the lime kiln (11) at 400 ℃, the sleeve (1) and the inner wall of the lime kiln (11) form an annular cavity (2), and uniform heat extraction is achieved by the cavity.
3. The heat extraction flue gas device of the mixed-combustion lime shaft kiln, according to claim 1, is characterized in that: the annular cavity (2) is communicated with a hot flue gas ring pipe (3) arranged at the top of the refractory layer.
4. The heat extraction flue gas device of the mixed-combustion lime shaft kiln, according to claim 1, is characterized in that: the hot flue gas is directly mixed with the existing flue gas.
5. The heat extraction flue gas device of the mixed-combustion lime shaft kiln, according to claim 1, is characterized in that: the electric regulating valves (6) and (9) are respectively arranged on the pipelines of the hot flue gas main pipe (5) and the existing kiln top flue gas main pipe (8), and the temperature sensor (13) is arranged on the mixed flue gas pipe (10) so as to control the temperature of the mixed flue gas within the range of 240-280 ℃.
6. The heat extraction flue gas device of the mixed-combustion lime shaft kiln, according to claim 1, is characterized in that: cyclone dust collectors (12) are arranged on the pipelines of the mixed flue gas pipe (10) in a butt joint mode, and stable operation of a subsequent desulfurization and denitrification system is guaranteed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223493133.6U CN220169990U (en) | 2022-12-27 | 2022-12-27 | Hot flue gas device is got to mixed combustion lime shaft kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223493133.6U CN220169990U (en) | 2022-12-27 | 2022-12-27 | Hot flue gas device is got to mixed combustion lime shaft kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220169990U true CN220169990U (en) | 2023-12-12 |
Family
ID=89062787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223493133.6U Active CN220169990U (en) | 2022-12-27 | 2022-12-27 | Hot flue gas device is got to mixed combustion lime shaft kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220169990U (en) |
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2022
- 2022-12-27 CN CN202223493133.6U patent/CN220169990U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |