CN209960963U - Heat treatment kiln - Google Patents
Heat treatment kiln Download PDFInfo
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- CN209960963U CN209960963U CN201822266953.9U CN201822266953U CN209960963U CN 209960963 U CN209960963 U CN 209960963U CN 201822266953 U CN201822266953 U CN 201822266953U CN 209960963 U CN209960963 U CN 209960963U
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Abstract
The utility model discloses a heat treatment kiln, including the furnace body that has furnace, install heating device and material conveyor in the furnace, install more than one heating element in the oven of furnace body. The utility model has the advantages of simple and compact structure, low cost, simple and easy manufacturing improvement, good temperature uniformity and the like.
Description
Technical Field
The utility model relates to a material thermal treatment equipment technical field, concretely relates to thermal treatment kiln.
Background
The sintering process of the new energy materials is generally to finish high-temperature solid-phase reaction in a heat treatment kiln such as a roller kiln, the maximum temperature difference of each point on the cross section of a hearth of the heat treatment kiln is temperature uniformity, and the smaller the temperature uniformity in the hearth is, the better the consistency of the sintering materials is, and the higher the product quality is. Generally speaking, radiation and convection are the main heat transfer modes in the hearth of heat treatment kilns such as roller kilns and the like, the temperature uniformity of the cross section of the hearth is mainly reflected in the temperature deviation between the side part and the middle part, the material in the middle part of the hearth is more subjected to the radiation of a heating element and the secondary radiation of a lining refractory material than the material on the two sides of the hearth, the temperature is relatively high, and in addition, air inlets are generally formed on the two sides of the hearth, and when low-temperature gas is introduced into the hearth from the two sides of the hearth through the air inlets, the temperature difference between the middle part and. And the temperature uniformity is further improved as the section width of the heat treatment kiln is increased.
The existing heat treatment kiln reduces the temperature difference by optimizing the arrangement and power control of heating elements in a hearth and heating gas added into the hearth through a gas inlet, and has the defects of high control difficulty and generally only can control the temperature difference to be about 10 ℃ at the lowest. However, with the deep development of new materials, the requirements on kiln equipment are higher and higher, and the temperature uniformity level of the existing kiln is not suitable for the development requirements of the new materials.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome the not enough of prior art existence, provide a simple structure compactness, with low costs, simple and easy, the good heat treatment kiln of temperature homogeneity of preparation improvement.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a heat treatment kiln comprises a kiln body with a hearth, wherein a heating device and a material conveying device are arranged in the hearth, and more than one heating element is arranged in the kiln wall of the kiln body.
As a further improvement of the above technical solution:
the heat treatment kiln also comprises an air inlet pipeline for ventilating the hearth, one section of the air inlet pipeline, which is positioned in the furnace wall of the furnace body, is a penetrating section, and the penetrating section is a nonlinear channel.
The penetrating section is Z-shaped.
The penetrating section is of a spiral type surrounding the outside of the at least one heating element.
The hearth is divided into a temperature rising section, a heat preservation section and a temperature reduction section which are connected in sequence, the temperature rising section and the heat preservation section are respectively provided with an air inlet pipeline, and the air inlet pipeline of the temperature rising section and/or the heat preservation section penetrates through the furnace wall of the furnace body of the temperature reduction section.
And the air inlet pipeline of the temperature rising section and/or the heat preservation section penetrates through the top furnace wall of the furnace body of the temperature reduction section.
The furnace chamber is divided into a plurality of temperature sections which are connected in sequence, and a plurality of heating elements controlled by an independent power controller are arranged in the furnace wall of the furnace body of each temperature section.
The furnace body comprises a furnace shell and a heat-conducting refractory lining arranged on the inner side of the furnace shell, and the heating element is arranged in the heat-conducting refractory lining or between the heat-conducting refractory lining and the furnace shell.
The heat-conducting refractory furnace lining is built by heat-conducting refractory material bricks, and the heating element and the penetrating section are arranged inside the heat-conducting refractory material bricks.
The heat-conducting refractory material brick is a high-alumina refractory brick.
Compared with the prior art, the utility model has the advantages of: the utility model discloses a heat treatment kiln installs a plurality of heating element in the oven of furnace body, heats the oven of furnace body through heating element, can form effectual heat radiation in the furnace, plays the effect that compensation furnace is close to oven regional temperature, can reduce the difference in temperature in the furnace, improves the homogeneity of furnace internal temperature to improve the product quality of thermal treatment material, make heat treatment kiln can satisfy the higher production requirement of requirement to temperature homogeneity. In addition, the uniformity of the temperature in the hearth can be improved only by installing the heating element in the furnace wall of the furnace body, and the heat treatment furnace also has the advantages of simple and compact structure, low cost and simple and easy manufacturing improvement.
Drawings
FIG. 1 is a schematic diagram of a sectional structure of a heat treatment furnace.
FIG. 2 is a schematic view of the structure of the heating element and the penetration section arranged in the high alumina refractory brick.
Illustration of the drawings:
1. a furnace body; 11. a hearth; 2. a heating device; 3. a material conveying device; 4. a heating element; 5. an air intake line; 51. a penetration section; 6. high-alumina refractory bricks.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments.
As shown in fig. 1, the heat treatment kiln of the present embodiment includes a furnace body 1 having a furnace chamber 11, a heating device 2 and a material conveying device 3 are installed in the furnace chamber 11, and a plurality of heating elements 4 are installed in a wall of the furnace body 1. This heat treatment kiln installs a plurality of heating element 4 in the oven of furnace body 1, heats the oven of furnace body 1 through heating element 4, can form effectual heat radiation in 11 hearths, plays the effect that compensation furnace 11 is close to the regional temperature of oven, can reduce the temperature difference in 11 hearths, improves the homogeneity of temperature in 11 hearths to improve the product quality of thermal treatment material, make heat treatment kiln can satisfy the higher production requirement of requirement to temperature homogeneity. In addition, the uniformity of the temperature in the hearth 11 can be improved only by installing the heating element 4 in the furnace wall of the furnace body 1, and the heat treatment furnace also has the advantages of simple and compact structure, low cost and simple and easy manufacturing improvement.
In this embodiment, the heat treatment kiln further comprises an air inlet pipeline 5 for ventilating the hearth 11, a section of the air inlet pipeline 5 located in the wall of the furnace body 1 is a through section 51, and the through section 51 is a nonlinear channel. The penetration section 51 of the air inlet pipeline 5 is a nonlinear channel, so that the retention time of the gas in the furnace wall of the furnace body 1 is increased, the heated furnace wall of the furnace body 1 can preheat the gas to a higher temperature, the influence of the low-temperature gas introduced into the hearth 11 on the temperature difference in the hearth 11 can be weakened, and the uniformity of the temperature in the hearth 11 is improved; and, under the condition of heating the gas to the same temperature, the heating power of the heating element 4 can be greatly reduced, and the purposes of saving energy consumption and reducing cost are achieved.
In this embodiment, the penetrating section 51 is in a zigzag shape, and is simple in structure and easy to manufacture. In other embodiments, the penetrating segment 51 may be of a spiral type around the outside of the at least one heating element 4, which further greatly increases the residence time of the gas in the furnace wall while ensuring a compact structure. Of course, other non-linear forms of the passage may also be employed for the penetrating segment 51.
In this embodiment, the furnace 11 is divided into a temperature rising section, a temperature preservation section and a temperature reduction section which are connected in sequence, the temperature rising section and the temperature preservation section are respectively provided with an air inlet pipeline 5, and the air inlet pipeline 5 of the temperature rising section and/or the temperature preservation section penetrates through the furnace wall of the furnace body 1 of the temperature reduction section. The air inlet pipeline 5 of the temperature rising section and/or the heat preservation section penetrates through the furnace wall of the furnace body 1 of the temperature reduction section, the furnace wall of the furnace body 1 of the temperature reduction section can exchange heat with gas in the air inlet pipeline 5, on one hand, the furnace wall of the furnace body 1 of the temperature reduction section is utilized to heat the gas in the air inlet pipeline 5, energy consumption can be further saved, cost is reduced, on the other hand, the gas in the air inlet pipeline 5 absorbs the furnace wall heat of the furnace body 1 of the temperature reduction section, and the temperature reduction efficiency of the temperature reduction section is improved.
In this embodiment, the air inlet pipeline 5 of the temperature rising section and/or the temperature preservation section passes through the top furnace wall of the furnace body 1 of the temperature reduction section, that is, the air inlet pipeline 5 passes through the furnace wall at the top of the hearth 11 of the temperature reduction section. Because the top furnace wall of the furnace body 1 is correspondingly positioned at the top of the hearth 11, the temperature is highest, the heat exchange efficiency with the gas in the gas inlet pipeline 5 is higher, and the preheating efficiency of the gas and the cooling efficiency of the cooling section can be improved.
In this embodiment, the furnace 11 is divided into a plurality of temperature zones connected in sequence, and a plurality of heating elements 4 controlled by an independent power controller are installed in the furnace wall of the furnace body 1 of each temperature zone. The heating power of the heating element 4 of each temperature section can be independently controlled, so that the temperature of each temperature section can be independently controlled, the controllability of the temperature in the hearth 11 is better, and the uniformity of the temperature in the whole hearth 11 is easy to ensure.
In this embodiment, the furnace body 1 includes a furnace shell and a heat-conducting refractory lining disposed inside the furnace shell, and the heating element 4 is installed inside the heat-conducting refractory lining, or the heating element 4 is installed between the heat-conducting refractory lining and the furnace shell. The heat-conducting refractory lining is made of a material with good heat conductivity and fire resistance, can be rapidly heated, can rapidly conduct and radiate heat to the hearth 11, and can improve the response speed of temperature regulation and control.
In this embodiment, as shown in fig. 2, the heat-conducting refractory lining is built up from heat-conducting refractory bricks, and the heating element 4 and the penetrating segment 51 are arranged inside the heat-conducting refractory bricks. The heating element 4 and the penetrating section 51 can be arranged in the heat-conducting refractory brick in advance, and then the heat-conducting refractory lining is built by a conventional method, so that the manufacturing and installation difficulty can be reduced; the heating element 4 and the penetrating section 51 are both arranged inside the heat-conducting refractory brick, so that the heating efficiency of the gas in the penetrating section 51 is improved; in addition, the heating element 4 and the penetrating section 51 are both positioned inside the heat-conducting refractory brick, and the structural compactness of the furnace body 1 can be improved.
In this embodiment, the heat-conducting refractory brick is a high-alumina refractory brick 6, the high-alumina refractory brick 6 is a mature component adopted by the furnace lining of the existing heat treatment furnace, and is made of a high-alumina porous refractory material, so that the heat capacity is good, the heat-conducting refractory brick can generate strong secondary radiation to materials in the hearth 11 after absorbing heat, and the heating efficiency is high. In addition, a small amount of gas in the penetrating section 51 can permeate into the hearth 11 through the pores in the high-alumina refractory bricks 6, so that the uniformity of the atmosphere in the hearth 11 is improved, the gas and the high-alumina refractory bricks 6 are in more sufficient contact, the contact time is longer, the preheating effect is better, and the uniformity of the atmosphere in the hearth 11 is improved.
Because the temperature difference in the hearth 11 is mainly embodied as the temperature difference between the middle part and the two side parts of the hearth 11, the heat treatment kiln of the embodiment is only provided with the heating elements 4 on the furnace walls at the two sides of the hearth 11, so that the cost, the manufacturing and installation difficulty and the control difficulty are reduced. Of course, in other embodiments, the heating element 4 may be provided at any position of the furnace wall of the furnace body 1.
In this embodiment, the heating device 2 is an electric heating tube, the material conveying device 3 is a roller rod type conveying device, and both the heating device 2 and the material conveying device 3 can be set by referring to the existing roller kiln. Preferably, electric heating pipes are arranged above and below the material conveying device 3.
The above description is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art, the modifications and changes obtained without departing from the technical idea of the present invention shall be considered as the protection scope of the present invention.
Claims (10)
1. A heat treatment kiln comprises a kiln body (1) with a hearth (11), wherein a heating device (2) and a material conveying device (3) are installed in the hearth (11), and the heat treatment kiln is characterized in that: more than one heating element (4) is arranged in the furnace wall of the furnace body (1).
2. The heat treatment kiln according to claim 1, characterized in that: the heat treatment kiln also comprises an air inlet pipeline (5) used for ventilating the hearth (11), wherein one section of the air inlet pipeline (5) positioned in the wall of the kiln body (1) is a penetrating section (51), and the penetrating section (51) is a nonlinear channel.
3. The heat treatment kiln according to claim 2, characterized in that: the penetrating section (51) is Z-shaped.
4. The heat treatment kiln according to claim 2, characterized in that: the through-section (51) is of a spiral type surrounding the outside of the at least one heating element (4).
5. The heat treatment kiln according to claim 2, characterized in that: the furnace (11) is divided into a temperature rising section, a heat preservation section and a temperature reduction section which are connected in sequence, the temperature rising section and the heat preservation section are respectively provided with an air inlet pipeline (5), and the air inlet pipeline (5) of the temperature rising section and/or the heat preservation section penetrates through the furnace wall of the furnace body (1) of the temperature reduction section.
6. The heat treatment kiln according to claim 5, characterized in that: and the air inlet pipeline (5) of the temperature rising section and/or the heat preservation section penetrates through the top furnace wall of the furnace body (1) of the temperature reduction section.
7. The heat treatment kiln according to claim 1, characterized in that: the hearth (11) is divided into a plurality of temperature zones which are connected in sequence, and a plurality of heating elements (4) controlled by an independent power controller are installed in the furnace wall of the furnace body (1) of each temperature zone.
8. The heat treatment kiln according to any one of claims 2 to 7, characterized in that: the furnace body (1) comprises a furnace shell and a heat-conducting refractory lining arranged on the inner side of the furnace shell, and the heating element (4) is arranged in the heat-conducting refractory lining, or the heating element (4) is arranged between the heat-conducting refractory lining and the furnace shell.
9. The heat treatment kiln according to claim 8, characterized in that: the heat-conducting refractory lining is built by heat-conducting refractory bricks, and the heating element (4) and the penetrating section (51) are arranged inside the heat-conducting refractory bricks.
10. The heat treatment kiln according to claim 9, characterized in that: the heat-conducting refractory material brick is a high-alumina refractory brick (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822266953.9U CN209960963U (en) | 2018-12-29 | 2018-12-29 | Heat treatment kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822266953.9U CN209960963U (en) | 2018-12-29 | 2018-12-29 | Heat treatment kiln |
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| Publication Number | Publication Date |
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| CN209960963U true CN209960963U (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822266953.9U Active CN209960963U (en) | 2018-12-29 | 2018-12-29 | Heat treatment kiln |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668427A (en) * | 2018-12-29 | 2019-04-23 | 湖南金炉科技股份有限公司 | It is heat-treated kiln |
| CN112648853A (en) * | 2020-12-18 | 2021-04-13 | 合肥恒力装备有限公司 | Temperature control method for improving temperature uniformity of ultra-wide hearth |
-
2018
- 2018-12-29 CN CN201822266953.9U patent/CN209960963U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668427A (en) * | 2018-12-29 | 2019-04-23 | 湖南金炉科技股份有限公司 | It is heat-treated kiln |
| CN112648853A (en) * | 2020-12-18 | 2021-04-13 | 合肥恒力装备有限公司 | Temperature control method for improving temperature uniformity of ultra-wide hearth |
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