CN220472325U - Sandwich type waste heat insulation and backheating kiln - Google Patents
Sandwich type waste heat insulation and backheating kiln Download PDFInfo
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- CN220472325U CN220472325U CN202321033337.3U CN202321033337U CN220472325U CN 220472325 U CN220472325 U CN 220472325U CN 202321033337 U CN202321033337 U CN 202321033337U CN 220472325 U CN220472325 U CN 220472325U
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- kiln
- waste heat
- liner
- outer frame
- backheating
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- 239000002918 waste heat Substances 0.000 title claims abstract description 62
- 238000009413 insulation Methods 0.000 title claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 40
- 238000011084 recovery Methods 0.000 claims abstract description 36
- 238000004321 preservation Methods 0.000 claims abstract description 16
- 238000005192 partition Methods 0.000 claims description 34
- 239000000779 smoke Substances 0.000 claims description 10
- 239000002912 waste gas Substances 0.000 claims description 5
- 230000008929 regeneration Effects 0.000 claims description 4
- 238000011069 regeneration method Methods 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 29
- 239000003546 flue gas Substances 0.000 abstract description 29
- 239000000463 material Substances 0.000 abstract description 20
- 238000002485 combustion reaction Methods 0.000 abstract description 14
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 239000013049 sediment Substances 0.000 abstract description 4
- 238000005245 sintering Methods 0.000 description 14
- 238000009434 installation Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005485 electric heating Methods 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The utility model discloses a sandwich type waste heat insulation and backheating kiln which comprises a kiln outer frame, an upper liner, a lower liner, an upper waste heat recovery unit, a lower waste heat recovery unit and a heating unit; the upper liner and the lower liner are oppositely arranged in the kiln outer frame, the upper liner and the inner wall of the kiln outer frame are matched to form an upper mounting cavity, and the lower liner and the inner wall of the kiln outer frame are matched to form a lower mounting cavity; the upper waste heat recovery unit is arranged in the upper mounting cavity, and the lower waste heat recovery unit is arranged in the lower mounting cavity; the heating unit is arranged on the kiln outer frame, and the heating end of the heating unit extends to the inside of the upper liner or the inside of the lower liner; the utility model aims to provide a sandwich type waste heat preservation and backheating kiln, which improves the utilization of waste heat, avoids the heat loss of a combustion furnace, achieves the purposes of energy conservation and emission reduction, separates flue gas from sintered materials and avoids sediment in the flue gas from polluting the materials.
Description
Technical Field
The utility model relates to the technical field of kilns, in particular to a sandwich type waste heat preservation and backheating kiln.
Background
The kiln for sintering the materials currently used generally adopts a mode of firing fuel gas in the kiln or heating an electric heating pipe in the kiln, and most of heat generated during kiln heating is directly discharged, so that heat energy is wasted, and the recycling of the residual heat heated by the kiln is not realized.
The partial waste heat recovery mode is that the hot flue gas generated by the high temperature section of the kiln is returned to the middle temperature section or the low temperature section, and although the waste heat recovery function can be achieved to a certain extent, the pollution particles generated by the high temperature section of the kiln are also conveyed to the middle temperature section or the low temperature section, and after the hot flue gas containing dust is cooled, the pollution particles sink and fall onto the sintered materials, so that the materials are polluted, and the quality of the sintered materials is affected.
In a low-temperature section of a conventional kiln, tar accumulation can occur under long-term low air temperature, excessive tar accumulation can easily generate electric conduction, and the occurrence of the electric conduction can cause electric shock to sintered materials, particularly to the sintering process of battery materials, so that the quality of the sintered materials is affected.
Disclosure of Invention
The utility model aims to provide a sandwich type waste heat preservation and backheating kiln, which improves the utilization of waste heat, avoids the heat loss of a combustion furnace, achieves the purposes of energy conservation and emission reduction, separates flue gas from sintered materials and avoids sediment in the flue gas from polluting the materials.
To achieve the purpose, the utility model adopts the following technical scheme: the sandwich type waste heat preservation and regeneration kiln comprises a kiln outer frame, an upper liner, a lower liner, an upper waste heat recovery unit, a lower waste heat recovery unit and a heating unit;
the upper liner and the lower liner are oppositely arranged in the kiln outer frame, the upper liner and the inner wall of the kiln outer frame are matched to form an upper mounting cavity, and the lower liner and the inner wall of the kiln outer frame are matched to form a lower mounting cavity;
the upper waste heat recovery unit is arranged in the upper mounting cavity, and the lower waste heat recovery unit is arranged in the lower mounting cavity;
the heating unit is arranged on the kiln outer frame, and the heating end of the heating unit extends to the inner part of the upper liner or the inner part of the lower liner.
Preferably, the upper waste heat recovery unit comprises an upper flue inlet, an upper flue outlet and a plurality of upper partition plates, wherein the upper flue inlet is connected with the upper flue gas discharge end, the upper partition plates are arranged in the upper mounting cavity at intervals to form an upper channel, the upper flue outlet is connected with the air inlet end of the rear-stage waste gas treatment device, one end of the upper channel is communicated with the upper flue inlet, and the other end of the channel is communicated with the upper flue outlet.
Preferably, the upper partition plate is provided with upper connecting ports, and the upper connecting ports on two adjacent upper partition plates are distributed in a staggered manner.
Preferably, the upper connecting ports on the two adjacent upper partition plates are respectively positioned at the left side and the right side of the upper liner or above the top of the upper liner.
Preferably, the lower waste heat recovery unit comprises a lower flue inlet, a lower flue outlet and a plurality of lower partition plates, wherein the lower flue inlet is connected with the upper flue gas discharge end, the lower partition plates are arranged in the lower mounting cavity at intervals to form a lower channel, the lower flue outlet is connected with the air inlet end of the rear-stage waste gas treatment device, one end of the lower channel is communicated with the lower flue inlet, and the other end of the channel is communicated with the lower flue outlet.
Preferably, the lower partition plate is provided with lower connecting ports, and the lower connecting ports on two adjacent lower partition plates are distributed in a staggered manner.
Preferably, the lower connecting ports on the two adjacent lower partition plates are respectively positioned at the left side and the right side of the lower liner or below the bottom of the lower liner.
Preferably, the heating unit comprises a fixing frame and heating rods, wherein the fixing frame is arranged on two sides of the kiln outer frame, the heating rods are arranged on the fixing frame, and the heating ends of the heating rods extend to the inner part of the upper liner or the inner part of the lower liner.
Preferably, the kiln further comprises a connecting flange arranged at the end part of the kiln outer frame along the length direction, and the connecting flange is used for connecting the kiln outer frame to a preset position.
Preferably, the kiln comprises a kiln outer frame, a kiln inner shell, an upper liner and a lower liner, and a conveying roller, wherein the two ends of the conveying roller are arranged on the kiln outer frame, and the middle of the conveying roller is positioned between the upper liner and the lower liner.
The technical scheme of the utility model has the beneficial effects that: through last waste heat recovery unit of installation cavity setting and under installation cavity setting up waste heat recovery unit down, collect the flue gas of superior through corresponding waste heat recovery unit and utilize, heat last inner bag or lower inner bag, guarantee the sintering temperature in the kiln, avoid the thermal loss of burning furnace simultaneously, realize energy saving and emission reduction's purpose. High-temperature flue gas of the combustion furnace is guided into the upper side and the lower side simultaneously, so that the distribution of the high-temperature flue gas is more uniform, the heat exchange effect of the high-temperature flue gas is improved, and better waste heat recovery effect is realized. Waste heat flue gas generated by the combustion furnace is returned into the installation cavity in the device, and the corresponding inner container is heated, so that the waste heat is recycled. Meanwhile, the hot smoke and the materials in the working area are separated through the corresponding inner container, and the polluted sediment of the hot smoke in the installation cavity can not pollute the materials in the kiln.
The utilization of the waste heat is improved, the hot air is utilized to carry out heat replacement through the kiln, and the hot flue gas from the combustion furnace is cooled to 300-400 ℃ after passing through the kiln at 600-700 ℃.
The inner container is heated by utilizing the waste heat in the flue gas, so that tar generated by the sintering reaction of the inner container of the kiln is in a higher temperature environment, the tar is not easy to adhere to the furnace wall and the conveying roller rod, and particularly, the empty burning of the kiln can be reduced or avoided when the anode material of the lithium battery is burned, and the utilization rate of the kiln is improved. The inner container is arranged for heat exchange to serve as preheating and heat preservation, besides the heat exchange function of flue gas can be realized, tar generated in the sintering process is deposited on the inner container and cannot run out of the inner container, the temperature in the kiln is higher than that of a common kiln by one layer, the tar is not easy to adhere to a rotating part or other vulnerable parts under a high-temperature environment, the idle burning gap time of the kiln can be prolonged, and the use cost is saved.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the present utility model;
FIG. 2 is a schematic perspective cross-sectional view of one embodiment of the present utility model;
fig. 3 is a schematic perspective view of a part of the outer frame of the kiln according to an embodiment of the utility model.
Wherein: the kiln comprises a kiln outer frame 1, a connecting flange 11, an upper liner 2, a lower liner 3, an upper waste heat recovery unit 4, an upper flue inlet 41, an upper flue outlet 42, an upper partition plate 43, an upper connecting port 431, a lower waste heat recovery unit 5, a heating unit 6, a fixing frame 61 and a heating rod 62.
Detailed Description
The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly, for distinguishing between the descriptive features, and not sequentially, and not lightly.
In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 to 3, a sandwich type waste heat insulation and regeneration kiln comprises a kiln outer frame 1, an upper liner 2, a lower liner 3, an upper waste heat recovery unit 4, a lower waste heat recovery unit 5 and a heating unit 6;
the upper liner 2 and the lower liner 3 are oppositely arranged in the kiln outer frame 1, the upper liner 2 and the inner wall of the kiln outer frame 1 are matched to form an upper mounting cavity, and the lower liner 3 and the inner wall of the kiln outer frame 1 are matched to form a lower mounting cavity;
the upper waste heat recovery unit 4 is arranged in the upper mounting cavity, and the lower waste heat recovery unit 5 is arranged in the lower mounting cavity;
the heating unit 6 is arranged on the kiln outer frame 1, and the heating end of the heating unit 6 extends to the inner part of the upper liner 2 or the inner part of the lower liner 3.
The kiln outer frame 1, the upper liner 2 and the lower liner 3 are matched to form a kiln wall of the kiln, and materials are conveyed into the kiln for high-temperature sintering. According to the utility model, the upper waste heat recovery unit 4 is arranged in the upper mounting cavity, and the lower waste heat recovery unit 5 is arranged in the lower mounting cavity, so that the flue gas of the upper-stage combustion furnace is collected and utilized through the corresponding waste heat recovery units, the upper liner 2 or the lower liner is heated, the sintering temperature in the kiln is ensured, the heat loss of the combustion furnace is avoided, and the purposes of energy conservation and emission reduction are realized. High-temperature flue gas of the combustion furnace is guided into the upper side and the lower side simultaneously, so that the distribution of the high-temperature flue gas is more uniform, the heat exchange effect of the high-temperature flue gas is improved, and better waste heat recovery effect is realized. Waste heat flue gas generated by the combustion furnace is returned into the installation cavity in the device, and the corresponding inner container is heated, so that the waste heat is recycled. Meanwhile, the hot smoke and the materials in the working area are separated through the corresponding inner container, and the polluted sediment of the hot smoke in the installation cavity can not pollute the materials in the kiln.
The top or the bottom of the kiln outer frame 1 is provided with a plurality of cover plates, the cover plates are fixed at the top of the kiln by bolts, the contact part of the cover plates and the kiln top is sealed, and the cover plates can be opened to treat accumulated dust at regular intervals.
Preferably, the upper waste heat recovery unit 4 includes an upper flue inlet 41, an upper flue outlet 42 and a plurality of upper partition plates 43, the upper flue inlet 41 is connected with the upper flue gas discharge end, the upper partition plates 43 are arranged in the upper installation cavity at intervals and form an upper channel, the upper flue outlet 42 is connected with the air inlet end of the rear-stage exhaust gas treatment device, one end of the upper channel is communicated with the upper flue inlet 41, and the other end of the upper channel is communicated with the upper flue outlet 42. The fume exhaust end of the upper stage can be the fume exhaust end of a combustion furnace or other equipment for generating hot fume.
The upper partition plate 43 is provided with upper connection ports 431, and the upper connection ports 431 on two adjacent upper partition plates 43 are staggered.
The upper connection ports 431 of the two adjacent upper partition plates 43 are respectively positioned at the left and right sides of the upper liner 2 or above the top of the upper liner 2.
The cross section of the inner container is of a concave structure, the opening of the upper inner container 2 is downward, the opening of the lower inner container 3 is upward, and a sintering area is arranged between the upper inner container 2 and the lower inner container 3. The high-temperature flue gas led in by the combustion furnace is conveyed into the upper channel and the lower channel, heat transfer is carried out through the liner, the flue gas heat of the combustion furnace is recycled, the sintering area is heated, the temperature of the sintering area is more uniform, and the purposes of energy conservation and emission reduction are achieved.
The plurality of upper partition plates 43 enable the upper channel to form a Z-shaped flue gas channel, so that flue gas can continuously flow along the existing channel, the contact area between the flue gas and the inner container is increased, the heat exchange efficiency is improved, the inner container is heated more uniformly, the inner container acts as a heat preservation layer, and the continuous heat preservation effect is generated in the kiln. The upper partition plates 43 may be disposed in an equidistant distribution or may be disposed in a non-equidistant distribution.
In order to ensure the uniformity of the smoke inflow, the upper connection ports 431 are arranged in a staggered manner between the left and right, so that the hot smoke can flow along the left and right sides of the inner container respectively. Preferably, the connectors of the upper liner and the lower liner can be staggered, namely: if the left side of the upper liner is provided with a smoke port, the lower liner is arranged on the right side, and the opposite side is also arranged on the inner liner, so that the uniform heat transfer of the hot smoke between the upper liner and the lower liner can be realized.
The upper and lower inner containers are preferably made of stainless steel materials, and have good heat exchange effect. The inner container is arranged for heat exchange to serve as preheating and heat preservation, besides the heat exchange function of flue gas can be realized, tar generated in the sintering process is deposited on the inner container and cannot run out of the inner container, the temperature in the kiln is higher than that of a common kiln by one layer, the tar is not easy to adhere to a rotating part or other vulnerable parts under a high-temperature environment, the idle burning gap time of the kiln can be prolonged, and the use cost is saved.
Preferably, the lower waste heat recovery unit 5 comprises a lower flue inlet, a lower flue outlet and a plurality of lower partition plates, wherein the lower flue inlet is connected with the upper flue gas discharge end, the lower partition plates are arranged in the lower mounting cavity at intervals to form a lower channel, the lower flue outlet is connected with the air inlet end of the rear-stage waste gas treatment device, one end of the lower channel is communicated with the lower flue inlet, and the other end of the channel is communicated with the lower flue outlet.
The lower partition board is provided with lower connectors, and the lower connectors on two adjacent lower partition boards are distributed in a staggered manner.
The lower connecting ports on the two adjacent lower partition plates are respectively positioned at the left side and the right side of the lower liner 3 or below the bottom of the lower liner 3. The working principle of the lower waste heat recovery unit 5 is the same as that of the upper waste heat recovery unit 4.
Specifically, the heating unit 6 includes a fixing frame 61 and heating rods 62, the fixing frame 61 is provided on both sides of the kiln outer frame 1, the heating rods 62 are provided on the fixing frame 61, and the heating ends of the heating rods 62 extend to the inside of the upper liner 2 or the inside of the lower liner 3.
The heating rod 62 is provided to heat the inside of the upper liner 2 or the inside of the lower liner 3, thereby increasing the temperature in the sintering region and realizing the sintering of the material. The heating unit 6 can adopt an electric heating rod or a nozzle for combustion, and the heating rods of the upper and lower inner containers can be staggered in the vertical direction so as to uniformly heat the upper and lower inner containers.
Preferably, the kiln further comprises a connecting flange 11, wherein the connecting flange 11 is arranged at the end part of the kiln outer frame 1 along the length direction, and the connecting flange 11 is used for connecting the kiln outer frame 1 to a preset position. The front end and the rear end of the kiln are provided with the connecting flanges 11, the connecting flanges 11 are used for installing and connecting the front kiln and the rear kiln, and the kiln can be connected at different stations according to actual production requirements.
The utility model can be provided with corresponding fire-blocking walls for partition, and each kiln is spliced into a long kiln on site, so that the heat exchange of the liner can be realized by arranging and using a certain clamping section or a certain clamping sections in the long kiln.
Meanwhile, the kiln comprises a conveying roller, two ends of the conveying roller are erected on the kiln outer frame 1, and the middle of the conveying roller is located between the upper liner 2 and the lower liner 3.
The gap between the transverse folding plates of the upper inner container and the lower inner container is used for installing and inserting a driving roller rod, the upper part of the roller rod can be used for conveying ceramic blanks or new energy battery raw materials to realize sintering, a plurality of electric heating rods for heating or nozzles for combustion are arranged on the side surfaces of the upper inner container and the lower inner container, and the heating rods of the upper inner container and the lower inner container can be staggered in the vertical direction to uniformly heat the upper inner container and the lower inner container.
In the description herein, reference to the term "embodiment," "example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from consideration of this specification without undue burden.
Claims (10)
1. The sandwich type waste heat insulation and backheating kiln is characterized by comprising a kiln outer frame, an upper liner, a lower liner, an upper waste heat recovery unit, a lower waste heat recovery unit and a heating unit;
the upper liner and the lower liner are oppositely arranged in the kiln outer frame, the upper liner and the inner wall of the kiln outer frame are matched to form an upper mounting cavity, and the lower liner and the inner wall of the kiln outer frame are matched to form a lower mounting cavity;
the upper waste heat recovery unit is arranged in the upper mounting cavity, and the lower waste heat recovery unit is arranged in the lower mounting cavity;
the heating unit is arranged on the kiln outer frame, and the heating end of the heating unit extends to the inner part of the upper liner or the inner part of the lower liner.
2. The sandwich-type waste heat preservation and backheating kiln according to claim 1, wherein the upper waste heat recovery unit comprises an upper flue inlet, an upper flue outlet and a plurality of upper partition plates, the upper flue inlet is connected with a smoke discharge end of an upper stage, the upper partition plates are arranged in the upper mounting cavity at intervals to form an upper channel, the upper flue outlet is connected with an air inlet end of a rear-stage waste gas treatment device, one end of the upper channel is communicated with the upper flue inlet, and the other end of the upper channel is communicated with the upper flue outlet.
3. The sandwich type waste heat preservation and backheating kiln according to claim 2, wherein the upper partition plates are provided with upper connecting ports, and the upper connecting ports on the two adjacent upper partition plates are distributed in a staggered manner.
4. A sandwich type waste heat insulation and backheating kiln according to claim 3, wherein the upper connecting ports on the two adjacent upper partition plates are respectively positioned at the left side and the right side of the upper liner or above the top of the upper liner.
5. The sandwich-type waste heat preservation and regeneration kiln according to claim 1, wherein the lower waste heat recovery unit comprises a lower flue inlet, a lower flue outlet and a plurality of lower partition plates, the lower flue inlet is connected with a smoke discharge end of an upper stage, the lower partition plates are arranged in a lower mounting cavity at intervals to form a lower channel, the lower flue outlet is connected with an air inlet end of a rear-stage waste gas treatment device, one end of the lower channel is communicated with the lower flue inlet, and the other end of the channel is communicated with the lower flue outlet.
6. The sandwich type waste heat preservation and backheating kiln as claimed in claim 5, wherein the lower partition plates are provided with lower connecting ports, and the lower connecting ports on two adjacent lower partition plates are distributed in a staggered manner.
7. The sandwich-type waste heat preservation and backheating kiln according to claim 6, wherein the lower connecting ports on the two adjacent lower partition plates are respectively positioned at the left side and the right side of the lower liner or below the bottom of the lower liner.
8. The sandwich type waste heat preservation and backheating kiln according to claim 1, wherein the heating unit comprises a fixing frame and heating rods, the fixing frame is arranged on two sides of the outer frame of the kiln, the heating rods are arranged on the fixing frame, and heating ends of the heating rods extend to the inner part of the upper liner or the inner part of the lower liner.
9. The sandwich-type waste heat preservation and regeneration kiln according to claim 1, further comprising a connecting flange arranged at the end of the kiln outer frame along the length direction, wherein the connecting flange is used for connecting the kiln outer frame to a preset position.
10. The sandwich type waste heat preservation and backheating kiln according to claim 1, further comprising conveying rollers, wherein two ends of each conveying roller are erected on an outer kiln frame, and the middle of each conveying roller is located between the upper liner and the lower liner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321033337.3U CN220472325U (en) | 2023-04-28 | 2023-04-28 | Sandwich type waste heat insulation and backheating kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321033337.3U CN220472325U (en) | 2023-04-28 | 2023-04-28 | Sandwich type waste heat insulation and backheating kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220472325U true CN220472325U (en) | 2024-02-09 |
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ID=89801430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321033337.3U Active CN220472325U (en) | 2023-04-28 | 2023-04-28 | Sandwich type waste heat insulation and backheating kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220472325U (en) |
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2023
- 2023-04-28 CN CN202321033337.3U patent/CN220472325U/en active Active
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