CN220136090U - Ash deposition preventing device for middle channel of double-chamber kiln - Google Patents
Ash deposition preventing device for middle channel of double-chamber kiln Download PDFInfo
- Publication number
- CN220136090U CN220136090U CN202321249526.4U CN202321249526U CN220136090U CN 220136090 U CN220136090 U CN 220136090U CN 202321249526 U CN202321249526 U CN 202321249526U CN 220136090 U CN220136090 U CN 220136090U
- Authority
- CN
- China
- Prior art keywords
- combustion
- kiln
- supporting
- air
- valve
- 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.)
- Active
Links
- 230000008021 deposition Effects 0.000 title claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 43
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000428 dust Substances 0.000 claims abstract description 27
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 13
- 239000007921 spray Substances 0.000 claims abstract description 10
- 239000003500 flue dust Substances 0.000 claims abstract 3
- 239000003546 flue gas Substances 0.000 claims description 22
- 210000000038 chest Anatomy 0.000 claims 11
- 230000002265 prevention Effects 0.000 claims 4
- 230000009977 dual effect Effects 0.000 claims 2
- 238000009825 accumulation Methods 0.000 abstract description 16
- 238000002485 combustion reaction Methods 0.000 description 28
- 238000007599 discharging Methods 0.000 description 13
- 238000001354 calcination Methods 0.000 description 10
- 238000007664 blowing Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000005338 heat storage Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model discloses an ash deposition preventing device for a double-hearth kiln intermediate channel, which comprises an A kiln hearth and a B kiln hearth which are connected through the intermediate channel, a spray gun, a discharge platform, a discharge hopper, a discharge flashboard, a combustion-supporting fan, a combustion-supporting pipeline, a combustion-supporting air release valve, a combustion-supporting air reversing valve, a chimney reversing valve, a flue dust remover, a cooling fan, a cooling air release valve and a cooling air electric valve, wherein an intermediate channel air pipe extending out of the combustion-supporting pipeline connected with the combustion-supporting fan is connected to the intermediate channel, and a carbon monoxide measuring device is arranged on a pipeline between the chimney reversing valve and the flue dust remover. The utility model can solve the problems of serious dust accumulation in the middle channel of the existing double-chamber kiln, blockage and influence on the product quality.
Description
Technical Field
The utility model relates to the technical field of steel manufacturing and equipment thereof, in particular to a device for preventing dust accumulation in a middle channel of a double-hearth kiln.
Background
The double-hearth kiln is one of advanced shaft kilns for calcining lime, and has the advantages of high automation degree, small occupied area, simple interface operation and advanced process technology. The good parallel flow heat accumulation principle of the double-chamber kiln ensures the full combustion of coal gas.
The double-hearth kiln is provided with two kiln barrels, an A kiln hearth 6 and a B kiln hearth 9 which are connected through a middle channel 11, spray guns 4 are arranged at the inner upper parts of the A kiln hearth and the B kiln hearth, a discharge hopper 16 is arranged below a discharge platform 13 at the lower parts of the A kiln hearth and the B kiln hearth, a discharge gate plate 12 is arranged at the bottom of the discharge hopper 16, a combustion-supporting fan 17 is connected with the rear branch of a combustion-supporting air release valve 1 through a combustion-supporting pipeline 2, two combustion-supporting air reversing valves 3 are respectively connected with the tops of the A kiln hearth and the B kiln hearth, the two pipelines connected with the two combustion-supporting air reversing valves 3 are combined and then are connected with a flue gas dust remover 15 through a chimney reversing valve 14, and a cooling fan 18 is connected with a discharge hopper 16 at the bottom of the A kiln hearth and the B kiln hearth through a cooling air electric valve 19 respectively, as shown in figure 1.
When one of the two kiln chambers of the double-chamber kiln is calcined, the other chamber is in a heat storage state. In the kiln chamber 6 of the combustion chamber A, fuel is mixed with combustion-supporting air 5 entering the kiln through a spray gun 4 at a spray gun head for combustion, generated combustion flue gas 8 preheats stone in a heat accumulation chamber through an intermediate channel 11, and the preheated combustion flue gas 8 enters a flue gas dust remover 15 through a combustion-supporting air reversing valve 3 and a chimney reversing valve 14 and is discharged into the atmosphere. And cooling air 7 is blown into the cooling fan at the bottom of the kiln, enters from the bottom of the kiln through the kiln cooling hood, and cools the finished product discharged from the kiln. The cooling air 7 of the combustion chamber A kiln chamber 6 cools the combustion chamber finished product, enters the heat accumulation chamber B kiln chamber 9 through the middle channel 11, and enters the flue gas dust remover 15 along with the flue gas from bottom to top together with the cooling air 7 of the heat accumulation chamber.
During normal combustion operation, high-temperature flue gas generated after the Maiz calcination and preheated cooling air 7 of the calcining zone flow through the middle channel 11 to realize heat accumulation of the heat accumulation chamber B kiln chamber 9. During production, limestone in the kiln is decomposed to produce a large amount of lime powder. The dust and the gravels pass through the middle channel 11 and the annular channel (the periphery of the middle channel) along the flue gas under the action of high-temperature air flow, and then enter the heat accumulation chamber. As the kiln pressure is reduced to zero during the kiln reversing or stopping, dust impurities accumulate and settle or adhere to the bottom of the platform of the intermediate channel 11 under the action of gravity.
The production process is influenced by the blockage of the middle channel of the kiln, the quality of kiln products is influenced by the fact that the quality of the products is off-set, the set productivity is low due to insufficient heat exchange, and the like, and only the kiln can be stopped for emptying, overhauling and cleaning, so that the production efficiency of the kiln is not beneficial to being exerted.
It is therefore possible to avoid the occurrence of clogging of the intermediate passage by improving the execution of a series of process operations.
Disclosure of Invention
The utility model aims to solve the problem of providing an ash deposition preventing device for a double-hearth kiln middle channel, which aims to solve the problem that the existing double-hearth kiln middle channel is seriously deposited with ash, so that the blockage is caused and the product quality is influenced.
In order to solve the problems, the technical scheme of the utility model is as follows: the middle channel ash deposition preventing device for the double-chamber kiln comprises an A kiln chamber and a B kiln chamber which are connected through a middle channel, wherein spray guns are arranged on the upper portion in the A kiln chamber and the B kiln chamber, discharge hoppers are arranged below discharge platforms on the lower portion of the A kiln chamber and the B kiln chamber, discharge flashboards are arranged at the bottoms of the discharge hoppers, a combustion fan is connected with two combustion air reversing valves through combustion air release valves through combustion supporting pipelines, two combustion air reversing valves are respectively connected with the tops of the A kiln chamber and the B kiln chamber, the pipelines connected with the combustion air reversing valves are combined and then are connected with a flue gas dust remover through chimney reversing valves, cooling fans are respectively connected with discharge hoppers on the bottoms of the A kiln chamber and the B kiln chamber through cooling air pipelines, a middle channel air pipe is connected to the middle channel through the upper extension of the combustion supporting fans, and a carbon monoxide measuring device is arranged on the pipeline between the chimney reversing valves and the flue gas dust remover.
Among the above technical schemes, more specific schemes may be: and air cannons are arranged on two sides of the middle channel.
Further: the combustion-supporting fan, the combustion-supporting air release valve, the combustion-supporting air reversing valve, the chimney reversing valve, the flue gas dust remover, the cooling fan, the cooling air release valve and the cooling air electric valve are all connected with a control unit.
Further: the air cannon and the carbon monoxide measuring device are connected with the control unit.
Further: the control unit is a PLC.
Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following beneficial effects:
the device for preventing the dust deposition in the middle channel of the double-hearth kiln can furthest reduce the occurrence of channel blockage by arranging the carbon monoxide measuring device on the flue gas pipeline, adjusting the discharging times and the opening of the cooling air valve; after the reversing period is over, the middle channel air cannon sprays the partial area of the middle channel, so that dust is prevented from accumulating or adhering to the surface of the middle channel air cannon; leading the pipe from the combustion-supporting fan, leading the pipe into the middle channel, and blowing and cleaning the middle channel to ensure that the channel is in a ventilation state and avoid dust deposition in the middle channel.
Drawings
FIG. 1 is a front view of the prior art;
FIG. 2 is a front view of an embodiment of the present utility model;
FIG. 3 is a block diagram of an intermediate channel and air cannon in accordance with an embodiment of the present utility model;
FIG. 4 is a schematic view of the structural process of an embodiment of the present utility model;
the marks in the figure are as follows: the combustion air discharge valve 1, the combustion pipeline 2, the combustion air reversing valve 3, the spray gun 4, the combustion air 5, the kiln chamber A6, the cooling air 7, the combustion flue gas 8, the kiln chamber B9, the cooling air discharge valve 10, the middle channel 11, the discharge flashboard 12, the discharge platform 13, the chimney reversing valve 14, the flue gas dust remover 15, the discharge hopper 16, the combustion fan 17, the cooling fan 18, the cooling air electric valve 19, the control unit 20, the carbon monoxide measuring device 21, the middle channel air pipe 22, the air cannon 23, the thermocouple 24 and the ash discharge plate 25.
Detailed Description
Embodiments of the utility model are described in further detail below with reference to the attached drawing figures:
the middle channel ash deposition preventing device of the double-hearth kiln is shown in fig. 2 to 4, the double-hearth kiln is provided with two kiln barrels, an A kiln hearth 6 and a B kiln hearth 9 which are connected through a middle channel 11, spray guns 4 are arranged at the inner upper parts of the A kiln hearth and the B kiln hearth, discharge hoppers 16 are arranged below discharge platforms 13 at the lower parts of the A kiln hearth and the B kiln hearth, discharge flashboards 12 are arranged at the bottoms of the discharge hoppers 16, combustion fans 17 are connected with the rear branch two sections of a combustion air release valve 1 through combustion-supporting pipelines 2 and are respectively connected with two combustion air reversing valves 3, the two combustion air reversing valves 3 are respectively connected with the tops of the A kiln hearth and the B kiln hearth, the pipelines connected with the two combustion air reversing valves 3 are combined and then are connected with a flue gas dust remover 15 through chimney reversing valves 14, and cooling fans 18 are respectively connected with the discharge hoppers 16 at the bottoms of the A kiln hearth and the B kiln hearth through cooling air electric valves 19 after being connected with cooling air release valves 10 through cooling air pipelines.
A middle channel air pipe 22 extends out of the combustion-supporting pipeline 2 connected with the combustion-supporting fan 17 and is connected to the middle channel 11, the middle channel 11 is led from the combustion-supporting fan 17, and air is blown and cleaned to the middle channel, so that the channel is in a ventilation state, and dust deposition in the middle channel is avoided; the carbon monoxide measuring device 21 is arranged on the pipeline between the chimney reversing valve 14 and the flue gas dust remover 15, and the carbon monoxide measuring device 21 is arranged on the flue gas pipeline, so that the occurrence of channel blockage can be reduced to the greatest extent by adjusting the discharging times and the opening of the cooling air valve; air cannons 23 are arranged on two sides of the middle channel 11, and after the reversing period is finished, the air cannons 23 of the middle channel are used for blowing partial areas of the middle channel 11, so that dust is prevented from accumulating or adhering to the surfaces of the middle channel 11.
The combustion-supporting fan 17, the combustion-supporting air release valve 1, the combustion-supporting air reversing valve 3, the chimney reversing valve 14, the flue gas dust remover 15, the cooling fan 18, the cooling air release valve 10 and the cooling air electric valve 19 of the double-hearth kiln are all connected with a control unit 20, the air cannon 23 and the carbon monoxide measuring device 21 are connected with the control unit 20, and the control unit is a PLC.
The double-hearth kiln comprises the following steps:
when the kiln chamber B is a heat accumulation chamber and the kiln chamber A is a calcination chamber, the unloading times of the heat accumulation chamber are at least 20 times greater than those of the calcination chamber. The action times of the ash discharging plate 25 of the double-hearth kiln discharging platform 13 are adjusted, the heat accumulation hearth discharging times are at least 20 times (such as 20 times of heat accumulation hearth discharging and 40 times of calcining hearth discharging) larger than the calcining hearth discharging times, the purpose is to reduce the discharging times of the calcining hearth as much as possible, more dust is generated due to ash discharging of the discharging platform, and cooling air entrains the dust to enter the middle channel.
Setting an intermediate channel air cannon action program, and after the combustion period of the kiln is finished, performing air cannon action and blowing once every time to avoid channel dust accumulation.
The granularity of the raw materials in the kiln is ensured to be 40-80mm with the proportion of more than 80%, and stone materials in the kiln are washed.
The opening of the cooling air electric valve is controlled, the opening of the combustion chamber cooling air electric valve is ensured to be smaller than that of the heat storage chamber air valve by at least 40 percent (such as 80 percent of the opening of the heat storage chamber cooling air electric valve and 40 percent of the opening of the calcination chamber electric valve), and the air quantity introduced into the middle channel is reduced by the method.
The intermediate duct 22 blows air to clean the intermediate duct 11 to keep the duct in a ventilated state.
Detecting the concentration of carbon monoxide in the flue gas by using a carbon monoxide measuring device, reasonably adjusting the combustion-supporting air coefficient, and ensuring the fuel to be fully combusted; by adjusting the combustion-supporting air coefficient as low as possible, the air quantity entering the kiln is reduced.
The average temperature of the thermocouple 24 on the ash discharge plate of the unloading platform is controlled within 200 ℃, so that the cooling air coefficient is reduced, and the cooling air quantity entering the kiln is controlled.
According to the method for preventing dust accumulation in the middle channel of the double-hearth kiln, the carbon monoxide measuring device is arranged on the flue gas pipeline, the discharging times are regulated, the opening of the cooling air valve is regulated, and the occurrence of channel blocking can be reduced to the greatest extent; after the reversing period is over, the middle channel air cannon sprays the partial area of the middle channel, so that dust is prevented from accumulating or adhering to the surface of the middle channel air cannon; introducing a pipe from a combustion-supporting fan, introducing the pipe into an intermediate channel, and blowing and cleaning the intermediate channel to enable the channel to be in a ventilation state, so that dust deposition of the intermediate channel is avoided; the opening of the cooling air valve and the discharging platform of the double-hearth kiln are reasonably controlled according to the conditions of the heat accumulation hearth and the calcination hearth, and the action program of the air cannon is reduced.
Claims (5)
1. The utility model provides an ash deposition device is prevented to two thorax kiln intermediate shaft, includes A kiln thorax and B kiln thorax and connects through intermediate shaft, A kiln thorax with upper portion all is equipped with the spray gun in the B kiln thorax, A kiln thorax with lower part of B kiln thorax is unloaded and is all equipped with the hopper of unloading under the platform, the hopper bottom of unloading has the flashboard of unloading, and combustion-supporting fan connects two sections of combustion-supporting air relief valve back branch through combustion-supporting pipeline and connects two combustion-supporting air switching-over valves respectively, two the combustion-supporting air switching-over valve connects the top of A kiln thorax and B kiln thorax respectively, two behind the pipeline merge that combustion-supporting air switching-over valve connects the pipeline connect the flue dust remover through chimney switching-over valve, cooling fan passes through the cooling air electric valve connection behind the cooling air relief valve respectively A kiln thorax with the hopper of B kiln thorax bottom, its characterized in that: and a middle channel air pipe extends out of the combustion-supporting pipeline connected with the combustion-supporting fan and is connected with the middle channel, and a carbon monoxide measuring device is arranged on the pipeline between the chimney reversing valve and the flue gas dust remover.
2. The dual-chamber kiln middle channel ash deposition prevention device according to claim 1, wherein: and air cannons are arranged on two sides of the middle channel.
3. The dual-chamber kiln middle channel ash deposition prevention device according to claim 2, wherein: the combustion-supporting fan, the combustion-supporting air release valve, the combustion-supporting air reversing valve, the chimney reversing valve, the flue gas dust remover, the cooling fan, the cooling air release valve and the cooling air electric valve are all connected with a control unit.
4. A dual chamber kiln intermediate channel ash deposition prevention apparatus according to claim 3, wherein: the air cannon and the carbon monoxide measuring device are connected with the control unit.
5. The dual chamber kiln middle channel ash deposition prevention device of claim 4, wherein: the control unit is a PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321249526.4U CN220136090U (en) | 2023-05-23 | 2023-05-23 | Ash deposition preventing device for middle channel of double-chamber kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321249526.4U CN220136090U (en) | 2023-05-23 | 2023-05-23 | Ash deposition preventing device for middle channel of double-chamber kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220136090U true CN220136090U (en) | 2023-12-05 |
Family
ID=88952348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321249526.4U Active CN220136090U (en) | 2023-05-23 | 2023-05-23 | Ash deposition preventing device for middle channel of double-chamber kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220136090U (en) |
-
2023
- 2023-05-23 CN CN202321249526.4U patent/CN220136090U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112146447B (en) | Method for preventing ash spraying of air release valve of double-hearth kiln | |
| CN111302675B (en) | Method and system for calcining dolomite in heat accumulating type energy-saving double-hearth shaft kiln | |
| CN101284666B (en) | Comprehensive utilization system for high temperature furnace gas of sealed calcium carbide furnace | |
| CN108264248A (en) | A kind of light-burned MgO suspension calcinings production technology and device | |
| CN105731838B (en) | A kind of calciner and method that light calcined magnesia is prepared with giobertite | |
| CN101445333A (en) | Method for calcining active lime by taking tail gas from sealing type calcium carbide furnace as fuel for rotary kiln | |
| CN208218696U (en) | A kind of light-burned MgO suspension calcining process units | |
| CN205011649U (en) | Novel environmental protection limekiln | |
| CN102336510B (en) | Flue gas latent energy recovery method in glass smelting kiln | |
| CN220136090U (en) | Ash deposition preventing device for middle channel of double-chamber kiln | |
| CN101870561B (en) | Large automatic shaft lime kiln | |
| CN116535113A (en) | Method for preventing dust deposition in middle channel of double-chamber kiln | |
| CN206891148U (en) | A kind of bicyclic room alternately heating filters dirt intellectuality calciner plant certainly | |
| CN207585376U (en) | A kind of fiery grading plant that disappears that gathers dust of cement produced with the dry method rotary kiln grate-cooler | |
| CN114353505B (en) | Environment-friendly high-efficiency double-hearth kiln control method | |
| KR100431863B1 (en) | Apparatus for cleaning dispersion plate in fluid-bed reducing furnace | |
| CN212293336U (en) | Four-hearth shaft kiln for calcining dolomite | |
| CN216404224U (en) | Double-chamber kiln channel ventilation device | |
| CN212894803U (en) | Preheating pre-reduction device for smelting reduction process | |
| CN102183142B (en) | Semi-heat accumulating type rotating bed equipment and process for producing large-size high-activity lime | |
| KR100894056B1 (en) | Device for protecting closure of port for recuperator in shaft kiln | |
| CN219244218U (en) | Refractory material air supply device for double-hearth kiln | |
| CN108558239B (en) | Magnesium oxide accurate preparation device and method | |
| CN202092458U (en) | Half regenerative type rotating bed device | |
| KR100833065B1 (en) | An apparatus for preventing deposition of dust coatings onto the channel of shaft kiln |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |