CN113237311A - Built-in single-section circulating multilayer drying kiln - Google Patents
Built-in single-section circulating multilayer drying kiln Download PDFInfo
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- CN113237311A CN113237311A CN202110593718.6A CN202110593718A CN113237311A CN 113237311 A CN113237311 A CN 113237311A CN 202110593718 A CN202110593718 A CN 202110593718A CN 113237311 A CN113237311 A CN 113237311A
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- heat supply
- kiln body
- heat
- kiln
- pipe
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- 238000001035 drying Methods 0.000 title claims abstract description 29
- 238000005192 partition Methods 0.000 claims abstract description 35
- 238000009413 insulation Methods 0.000 claims abstract description 15
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims 1
- 239000000919 ceramic Substances 0.000 abstract description 9
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 238000004321 preservation Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
- F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
- F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
- F26B15/122—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of material being carried by transversely moving rollers or rods which may rotate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/003—Handling, e.g. loading or unloading arrangements for articles
- F26B25/004—Handling, e.g. loading or unloading arrangements for articles in the shape of discrete sheets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
- F26B2210/02—Ceramic articles or ceramic semi-finished articles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a built-in single-section circulating multilayer drying kiln, which comprises a kiln body, a heat supply main pipe and a moisture exhaust main pipe, wherein the inner side wall of the kiln body is covered with a heat insulation layer, and a plurality of groups of conveying rollers are arranged in the kiln body; the upper and lower sides of each group of conveying rollers are respectively provided with a heat supply lower branch pipe and a heat supply upper branch pipe, the top of the kiln body is provided with a fan for bidirectional air supply, the air outlet of the fan is arranged in the kiln body, the air outlet of the fan is connected with a heat supply side pipe extending to the side wall of the kiln body, the heat supply lower branch pipe and the heat supply upper branch pipe are both connected with the heat supply side pipe, a heat insulation partition plate is further arranged in the kiln body, a partition space is formed between the heat insulation partition plate and the upper wall of the kiln body, and the air inlet of the fan is arranged in the partition space. The invention can quickly dry the ceramic tiles on the conveying rollers, can ensure the temperature of the transverse section of the kiln to be consistent, can further release moisture heat energy after moisture is matched with heating gas and pumped into the fan, and can achieve the aims of saving energy and reducing consumption by matching with the heat preservation effect of the heat preservation layer.
Description
Technical Field
The invention relates to the technical field of kilns, in particular to a built-in single-section circulating multilayer drying kiln.
Background
At present, most of drying kilns for ceramic production are five-layer drying kilns, and a heat supply pipeline enters from the top of each drying kiln and supplies heat to each layer in sequence. The temperature of the transverse section of each layer of kiln is not consistent, and the kiln has larger temperature difference, so that green brick cracks or dark cracks are easy to appear, and product loss and quality degradation are caused; and a part of heat in the existing drying kiln is directly extracted and discharged along with moisture, residual heat in the moisture cannot be recycled, and a part of heat is directly transferred to the atmosphere through a kiln body, so that waste of heat energy is caused, and the concept of energy conservation and consumption reduction is not met. Therefore, how to improve the structure of the conventional drying kiln to solve the above problems is an important technical problem to be solved by those skilled in the art.
Disclosure of Invention
Aiming at the defects of large temperature difference of the transverse section of the kiln and serious heat loss, the invention provides a built-in single-section circulating multilayer drying kiln for overcoming the defects.
A built-in single-section circulation multilayer drying kiln comprises a kiln body; also comprises a heat supply main pipe and a moisture removal main pipe; the inner side wall of the kiln body is covered with a heat insulation layer; a plurality of groups of conveying rollers are arranged in the kiln body; a heat supply lower branch pipe and a heat supply upper branch pipe are respectively arranged above and below each group of conveying rollers; a fan for bidirectional air supply is arranged at the top of the kiln body; the air outlet of the fan is arranged in the kiln body and is connected with a heat supply side pipe extending to the side wall of the kiln body; the lower heat supply branch pipe and the upper heat supply branch pipe are both connected with a heat supply side pipe; a heat insulation clapboard is also arranged in the kiln body; a partition space is formed between the heat-insulating partition plate and the upper wall of the kiln body; the air inlet of the fan is arranged in the partition space; the heat supply main pipe and the moisture removal main pipe are both communicated with the partition space.
Preferably, the position where the heat supply main pipe is communicated with the partition space and the position where the moisture exhaust main pipe is communicated with the partition space are diagonally arranged by taking the fan as the center.
By adopting the scheme, the heating gas can be effectively prevented from being directly discharged along the moisture discharging main pipe.
As a preferred scheme, a moisture removal channel is formed between one end, close to the heat supply main pipe, of the heat insulation partition plate and the heat insulation layer.
By adopting the scheme, the discharge of moisture is facilitated, and meanwhile, part of moisture can be guided to the fan for cyclic utilization through the partition space, so that the purposes of energy conservation and consumption reduction are achieved.
As a preferred scheme, an upper air outlet hole facing the conveying roller is formed in the heat supply lower branch pipe; the upper air outlet hole is arranged along the length direction of the lower heat supply branch pipe.
As a preferred scheme, a lower air outlet hole facing the conveying roller is formed in the heat supply upper branch pipe; the lower air outlet holes are arranged along the length direction of the heat supply upper branch pipe.
By adopting the scheme, the heating state of each part of the ceramic tile can be ensured to be consistent, so that the processing quality is ensured.
Preferably, an electric valve is arranged on a pipeline of the main dehumidifying pipe communicated with the partition space.
By adopting the scheme, the moisture discharging amount of the moisture discharging main pipe can be adjusted, so that the heat can be ensured to be recycled.
Preferably, a temperature control detector is arranged inside the kiln body.
By adopting the scheme, the condition of moisture discharge is determined according to the temperature in the drying kiln, if the temperature control detection is lower than the specified temperature, the heat supply amount is increased, the moisture discharge amount is reduced, and the drying efficiency is ensured.
Has the advantages that: the invention supplies heat through the heat supply main pipe, hot gas enters the partition space, when the fan works, the hot gas in the partition space enters the fan through the air inlet of the fan, and then is conveyed to the heat supply side pipe from the air outlet of the fan, and the heat supply side pipe guides the hot gas to the heat supply lower branch pipe and the heat supply upper branch pipe, so as to carry out rapid drying operation on the ceramic tiles on the conveying rollers, and simultaneously can ensure the temperature of the transverse section of the kiln to be consistent, the heat of the hot gas can be effectively prevented from dissipating due to the built-in heat supply side pipe, and the moisture in the kiln is increased in the drying process and is not easy to evaporate water on the ceramic tiles, therefore, the invention is provided with the moisture exhaust main pipe for exhausting the moisture in the kiln outwards, the exhaust flow is controlled by the electric valve, and the condition of moisture exhaust is determined according to the temperature in the drying kiln, for example: the using temperature of the drying kiln is 260 ℃, and if the temperature control detection is lower than the temperature, the heat supply amount is increased, and the moisture discharge amount is reduced; because the moisture can be through cutting off the space, and the moisture still has certain energy, the fan when the suction heat supply gas, can the partial moisture of suction simultaneously, because of containing partial heat in the moisture, directly take out the loss that causes heat energy, can further release the moisture heat energy again after cooperating the heat supply gas suction fan with the moisture again, take out the emission again after reaching minimum temperature, cooperate the heat preservation effect of heat preservation to reach energy saving and consumption reduction's purpose.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a side view of the present invention.
Fig. 3 is a top view of the present invention.
In the figure: 1-a kiln body; 2-a fan; 3, ceramic tiles to be dried; 4-heat supply lower branch pipe; 5-a heat supply upper branch pipe; 6-insulating layer; 7-a fan; 8-heat supply main pipe; 9-a moisture removal main pipe; 10-heat supply side pipe; 11-heat preservation partition board; 12-an electrically operated valve; 13-partition space.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
In the present invention, it should be noted that the terms "upper (top)", "lower (bottom)", "inner", "outer", "between", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the term "a number" means no less than 10 in number, which term is used for descriptive purposes only and is not to be construed as indicating or implying a relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in figures 1-3, the invention provides a built-in single-section circulation multilayer drying kiln, which comprises a kiln body 1, a heat supply main pipe 8 and a moisture exhaust main pipe 9; the inner side wall of the kiln body 1 is covered with a heat insulation layer 6; a plurality of groups of conveying rollers 2 are arranged in the kiln body 1; a heat supply lower branch pipe 4 and a heat supply upper branch pipe 5 are respectively arranged above and below each group of conveying rollers 2; a fan 7 for bidirectional air supply is arranged at the top of the kiln body 1; the air outlet of the fan 7 is arranged in the kiln body 1, and the air outlet of the fan 7 is connected with a heat supply side pipe 10 extending to the side wall of the kiln body 1; the lower heat supply branch pipe 4 and the upper heat supply branch pipe 5 are both connected with a heat supply side pipe 10; a heat insulation clapboard 11 is also arranged in the kiln body 1; a partition space 13 is formed between the heat-insulating partition plate 11 and the upper wall of the kiln body; an air inlet of the fan 7 is arranged in the partition space 13; the heat supply main pipe 8 and the moisture exhaust main pipe 9 are both communicated with the partition space 13.
In some embodiments of the present invention, the position where the heat supply main pipe 8 communicates with the partition space 13 and the position where the moisture exhaust main pipe 9 communicates with the partition space 13 are diagonally arranged with the fan 7 as the center; the heating gas can be effectively prevented from being directly discharged along the moisture discharging main pipe 9.
In some embodiments of the present invention, the moisture exhaust channel is formed between one end of the thermal insulation partition 11 close to the heat supply main pipe 8 and the thermal insulation layer 6; the device is beneficial to discharging of moisture, and can guide part of the moisture to the fan 7 for cyclic utilization through the partition space 13, thereby achieving the purposes of energy conservation and consumption reduction.
In some embodiments of the present invention, the heat supply lower branch pipe 4 is provided with an upper air outlet facing the conveying roller 2; the upper air outlet holes are arranged along the length direction of the heat supply lower branch pipe 4; the upper heat supply branch pipe 5 is provided with a lower air outlet hole facing the conveying roller 2; the lower air outlet holes are arranged along the length direction of the heat supply upper branch pipe 5; can ensure the consistent heating state of each part of the ceramic tile, thereby ensuring the processing quality.
In some embodiments of the present invention, an electric valve 12 is disposed on a pipeline of the main moisture exhaust pipe 9 communicating with the partition space 13; the dehumidifying amount of the dehumidifying main pipe 9 can be adjusted, so that the heat can be recycled.
In some embodiments of the invention, a temperature control detector is arranged inside the kiln body 1; the condition that moisture was discharged is according to the temperature decision in the drying kiln, if the control by temperature change detects and is less than the appointed temperature, then will increase the heat supply volume, reduces the moisture discharging volume, guarantees the efficiency of drying.
The working principle is as follows: when the fan 7 works, hot air in the partition space 13 enters the fan 7 through an air inlet of the fan 7, and is conveyed to the heat supply side pipe 10 from an air outlet of the fan 7, the heat supply side pipe 10 guides the hot air to the heat supply lower branch pipe 4 and the heat supply upper branch pipe 5, so that the ceramic tiles on the conveying rollers 2 are quickly dried, the heat supply side pipe 10 is internally provided with a main moisture exhaust pipe 9 which can effectively avoid heat loss of the hot air, moisture in the kiln body 1 is increased in the drying process and is not easy to evaporate moisture on the ceramic tiles, therefore, the main moisture exhaust pipe 9 is arranged for exhausting the moisture in the kiln body 1 outwards, the flow rate is controlled to be exhausted through the electric valve 12, and the condition of moisture exhaust is determined according to the temperature in the drying kiln, for example: the using temperature of the drying kiln is 260 ℃, and if the temperature control detection is lower than the temperature, the heat supply amount is increased, and the moisture discharge amount is reduced; because moisture can pass through wall space 13, and the moisture still has certain energy, fan 7 when the suction heat supply gas, can suction partial moisture simultaneously, because of contain partial heat in the moisture, directly take out and cause the loss of heat energy, can further release moisture heat energy again after cooperating heat supply gas suction fan 7 with moisture again, draw the emission after reaching minimum temperature again to reach energy saving and consumption reduction's purpose.
In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A built-in single-section circulation multilayer drying kiln comprises a kiln body; the method is characterized in that: also comprises a heat supply main pipe and a moisture removal main pipe; the inner side wall of the kiln body is covered with a heat insulation layer; a plurality of groups of conveying rollers are arranged in the kiln body; a heat supply lower branch pipe and a heat supply upper branch pipe are respectively arranged above and below each group of conveying rollers; a fan for bidirectional air supply is arranged at the top of the kiln body; the air outlet of the fan is arranged in the kiln body and is connected with a heat supply side pipe extending to the side wall of the kiln body; the lower heat supply branch pipe and the upper heat supply branch pipe are both connected with a heat supply side pipe; a heat insulation clapboard is also arranged in the kiln body; a partition space is formed between the heat-insulating partition plate and the upper wall of the kiln body; the air inlet of the fan is arranged in the partition space; the heat supply main pipe and the moisture removal main pipe are both communicated with the partition space.
2. The built-in single-section circulating multilayer drying kiln as claimed in claim 1, wherein the position where the heat supply main pipe is communicated with the partition space and the position where the moisture exhaust main pipe is communicated with the partition space are diagonally arranged centering on the fan.
3. The built-in single-section circulating multi-layer drying kiln as recited in claim 1, wherein a moisture-removing passage is formed between one end of the thermal insulation partition board close to the heat supply main pipe and the thermal insulation layer.
4. The built-in single-section circulating multilayer drying kiln as claimed in claim 1, wherein the heat supply lower branch pipe is provided with an upper air outlet facing the conveying roller; the upper air outlet hole is arranged along the length direction of the lower heat supply branch pipe.
5. The built-in single-section circulating multilayer drying kiln as claimed in claim 1, wherein the heat supply upper branch pipe is provided with a lower air outlet facing the conveying roller; the lower air outlet holes are arranged along the length direction of the heat supply upper branch pipe.
6. The built-in single-section circulating multi-layer drying kiln as claimed in claim 1, wherein the pipeline of the main dehumidifying pipe communicating with the partition space is provided with an electric valve.
7. The built-in single-section circulation multilayer drying kiln as claimed in claim 1, wherein a temperature control detector is arranged inside the kiln body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110593718.6A CN113237311A (en) | 2021-05-28 | 2021-05-28 | Built-in single-section circulating multilayer drying kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110593718.6A CN113237311A (en) | 2021-05-28 | 2021-05-28 | Built-in single-section circulating multilayer drying kiln |
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| Publication Number | Publication Date |
|---|---|
| CN113237311A true CN113237311A (en) | 2021-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110593718.6A Pending CN113237311A (en) | 2021-05-28 | 2021-05-28 | Built-in single-section circulating multilayer drying kiln |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183129A (en) * | 2011-04-29 | 2011-09-14 | 柳丹 | Drying device for architectural ceramic roller table |
| CN102748926A (en) * | 2012-07-06 | 2012-10-24 | 广东中窑窑业股份有限公司 | Building ceramic single-layer rapid dryer equipment |
| CN107131740A (en) * | 2017-06-23 | 2017-09-05 | 佛山市德力泰科技有限公司 | A kind of compact energy-saving dry kiln |
| CN207456052U (en) * | 2017-10-31 | 2018-06-05 | 广州纳诺新材料科技有限公司 | Constant temperature forced air drying device |
| CN109059433A (en) * | 2018-09-14 | 2018-12-21 | 广州热之源科技有限公司 | A kind of lumber kiln and its control method |
| KR102022456B1 (en) * | 2019-01-23 | 2019-09-18 | 이정율 | A Drying machine |
| CN214892431U (en) * | 2021-05-28 | 2021-11-26 | 佛山市金佰利机电有限公司 | Built-in single-section circulating multilayer drying kiln |
-
2021
- 2021-05-28 CN CN202110593718.6A patent/CN113237311A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183129A (en) * | 2011-04-29 | 2011-09-14 | 柳丹 | Drying device for architectural ceramic roller table |
| CN102748926A (en) * | 2012-07-06 | 2012-10-24 | 广东中窑窑业股份有限公司 | Building ceramic single-layer rapid dryer equipment |
| CN107131740A (en) * | 2017-06-23 | 2017-09-05 | 佛山市德力泰科技有限公司 | A kind of compact energy-saving dry kiln |
| CN207456052U (en) * | 2017-10-31 | 2018-06-05 | 广州纳诺新材料科技有限公司 | Constant temperature forced air drying device |
| CN109059433A (en) * | 2018-09-14 | 2018-12-21 | 广州热之源科技有限公司 | A kind of lumber kiln and its control method |
| KR102022456B1 (en) * | 2019-01-23 | 2019-09-18 | 이정율 | A Drying machine |
| CN214892431U (en) * | 2021-05-28 | 2021-11-26 | 佛山市金佰利机电有限公司 | Built-in single-section circulating multilayer drying kiln |
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