Kiln cooling structure with high efficiency and low energy consumption

Abstract

The utility model relates to the field of kiln cooling, in particular to a high-efficiency and low-energy-consumption kiln cooling structure, a kiln comprises an inner wall and an outer wall, a first cavity is formed in the inner side of the inner wall, and a product is placed in the first cavity; a second cavity is formed between the outer wall and the inner wall, a circulating fan is arranged in the second cavity, and the circulating fan drives gas in the first cavity and the second cavity to flow circularly. A baffle is arranged in the second cavity and divides the second cavity into a first area and a second area. The circulating fan is connected with the baffle and communicates with the first area and the second area. A cooling water pipe is arranged on the outer wall and connected to the outer wall in an attached mode. And by arranging the circulating fan, circular flow of gas in the first cavity and the second cavity is realized. The cooling water pipe is arranged on the outer side of the outer wall and is filled with the heat conduction material, so that the cooling effect is improved, and the service life of the cooling water pipe is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to kiln cooling technical field, especially a kind of high efficiency, low energy consumption's kiln cooling structure. BACKGROUND

[0002] In the process of kiln firing product, before discharging or according to specific process requirements, cooling operation is an indispensable link. This step not only helps the effective forming of product in the furnace, but also effectively reduces the temperature of kiln itself, to ensure the smooth progress of production process.

[0003] However, in the prior art, cooling operation faces some challenges, especially the production and manufacture of some special products need to fill nitrogen gas and other inert gases with special properties in the furnace, therefore, traditional cold air introduction method cannot be used for cooling. Instead, other methods are used, such as extracting kiln internal gas to heat exchange device, discharging into kiln after heat exchange, or continuously filling new corresponding gas for cooling. But these methods have obvious shortcomings: a large amount of gas flow is needed, which wastes gas resources; at the same time, a separate gas heat exchange device needs to be set up, which increases production cost and the floor area of the overall kiln equipment. In addition, cooling water pipes are set between the inner cavity and the outer cavity of the kiln for cooling, but the cooling water pipes need to be connected to the kiln by welding or other connection methods. In long-term use, the kiln is heated during operation and cooled during non-operation, which greatly affects the connection stability of the cooling water pipes. If the cooling water pipes are connected outside the outer wall, the effective cooling effect cannot be achieved. Therefore, how to effectively cool the kiln is a problem that needs to be considered by those skilled in the art. SUMMARY

[0004] The utility model aims at: provide a kind of high efficiency, low energy consumption's kiln cooling structure, to solve the problems such as low kiln cooling efficiency and unstable operation of kiln cooling device in prior art.

[0005] The technical scheme of the utility model is: a kind of high efficiency, low energy consumption's kiln cooling structure, kiln includes inner wall and outer wall, the first cavity is formed in the inner wall inner side, product is placed in the first cavity;Second cavity is formed between the outer wall and the inner wall, circulating fan is provided in the second cavity, the circulating fan drives the circulation of gas in the first cavity and the second cavity;

[0006] Baffle is provided in the second cavity, the baffle separates the second cavity into first area and second area;The circulating fan is connected with the baffle, and the first area and the second area are communicated;Cooling water pipe is provided on the outer wall, and the cooling water pipe is connected on the outer wall.

[0007] Preferably, the inner wall is provided with at least a first through hole for communication between the first cavity and the first region, and a second through hole for communication between the first cavity and the second region; when the internal gas circulates, the gas in the first region enters the first cavity through the first through hole, and then enters the second region through the second through hole.

[0008] Preferably, the circulating fan is connected to the outer wall, and the driving part of the circulating fan is arranged outside the outer wall.

[0009] Preferably, the baffle is arranged in a zigzag shape, including a first partition segment, a second partition segment and a third partition segment, the first partition segment and the third partition segment are parallel to each other and perpendicular to the second partition segment; the first partition segment is connected to the inner side of the outer wall, the third partition segment is connected to the outer side of the inner wall, and the second partition segment is connected to the circulating fan.

[0010] Preferably, the baffle is arranged at the upper end of the inner wall; the first through hole and the second through hole are arranged at two sides of the inner wall, respectively.

[0011] Preferably, the cooling water pipe is arranged outside the outer wall and connected to the outer wall by a clamp.

[0012] Preferably, the clamp covers the cooling water pipe, and a gap between the clamp and the outer wall is filled with a heat-conducting material.

[0013] Preferably, a support flange is arranged outside the inner wall, and the support flange is perpendicular to the inner wall.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] (1) By arranging the circulating fan and separating the second cavity into the first region and the second region by the baffle, the circulation of the gas in the first cavity and the second cavity is realized, and finally the excess heat is taken away by the cooling water pipe. Not only the cooling efficiency is improved, but also the internal temperature of the kiln can be rapidly and uniformly reduced, and the problem of requiring a large amount of gas flow in the traditional cooling mode is avoided, and the energy consumption is significantly reduced. A separate gas heat exchange device is not needed, so that the land occupation area of the equipment is reduced, and the production cost is also reduced.

[0016] (2) By arranging the cooling water pipe outside the outer wall and connecting the cooling water pipe to the outer wall by the clamp, the problem of unstable connection caused by thermal expansion and cold contraction in the traditional cooling water pipe connection mode is effectively solved; by filling the heat-conducting material, the contact area of the cooling water pipe and the outer wall is increased, which not only improves the cooling effect, but also prolongs the service life of the cooling water pipe. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further described in connection with the drawings and examples:

[0018] Fig. 1 A front view structural schematic diagram of the kiln cooling structure;

[0019] Fig. 2 A side view structural schematic diagram of the kiln cooling structure;

[0020] Fig. 3 A structural schematic diagram of the cooling water pipe and the outer wall connection.

[0021] Wherein: inner wall 1, support flange 11, first through hole 12, second through hole 13, outer wall 2, cooling water pipe 21, clamp 22, heat conducting material 23, first cavity 3, second cavity 4, first area 41, second area 42, air inlet pipe 5, circulating fan 6, baffle 7, first partition 71, second partition 72, third partition 73. DETAILED DESCRIPTION

[0022] The content of the utility model will be further described in detail in combination with specific embodiments:

[0023] As Figs. 1-3 shown, the utility model is applied to the cooling of kiln. The kiln includes inner wall 1 and outer wall 2, the inner wall 1 forms first cavity 3 on the inner side, the second cavity 4 is formed between the outer wall 2 and the inner wall 1, and the first cavity 3 and the second cavity 4 are interconnected. The product to be fired is placed in the first cavity 3 for firing, and the air inlet pipe 5 is arranged below the kiln. Nitrogen and other inert gases are needed to be introduced according to the product manufacturing requirements, so that the inside of the product kiln is always in the state of filling inert gas before the product is fired to completely cool and form. In the embodiment, the cooling water pipe arranged in the kiln for cooling is cancelled, and the cooling mode of continuously introducing low-temperature inert gas for cooling is also improved. Instead, the gas flow in the first cavity 3 and the second cavity 4 of the kiln is driven by the circulating fan 6, and then the outer wall 2 is cooled by the cooling water, so that the heat exchange of the gas inside the outer wall 2 is realized. Specifically:

[0024] A high-efficiency and low-energy-consumption kiln cooling structure, the second cavity 4 is provided with a circulating fan 6, the working part of the circulating fan 6 is arranged in the second cavity 4, and the driving part is arranged on the outer side of the outer wall 2, so as to avoid overheating of the fan. The support flange 11 is arranged on the outer side of the inner wall 1, the support flange 11 is perpendicular to the inner wall 1, and the inner wall 1 is supported by the support flange 11, so as to improve the overall strength of the inner wall 1.

[0025] The second cavity 4 is provided with a baffle plate, which divides the second cavity 4 into a first area 41 and a second area 42; the circulation fan 6 is connected with the baffle plate and communicates the first area 41 and the second area 42. In the preferred embodiment, the baffle plate 7 is provided in a Z shape and is arranged at the upper end of the inner wall 1, comprising a first partition segment 71, a second partition segment 72 and a third partition segment 73, the first partition segment 71 and the third partition segment 73 are parallel to each other, the first partition segment 71 is connected with the inner side of the outer wall 2, and the third partition segment 73 is connected with the outer side of the inner wall 1; the second partition segment 72 is perpendicular to the first partition segment 71 and the third partition segment 73, and the second partition segment 72 is connected with the working part of the circulation fan 6. Through the connection of the second partition segment 72 and the circulation fan 6, the first area 41 and the second area 42 are also communicated.

[0026] Of course, in other embodiments, the baffle plate 7 can also be provided in other shapes, and the circulation fan 6 can also be connected in other ways or directly arranged in the first area 41 or the second area 42, as long as it can meet the requirement that the baffle plate 7 divides the second cavity 4 into two parts of the first area 41 and the second area 42, and the circulation fan 6 can make the gas circulate in the first area 41 and the second area 42.

[0027] Further, the inner wall 1 is provided with at least a first through hole 12 for communicating the first cavity 3 with the first area 41, and a second through hole 13 for communicating the first cavity 3 with the second area 42. The first through hole 12 and the second through hole 13 are arranged on both sides of the inner wall 1. In this embodiment, the connection between the second partition segment 72 and the circulation fan 6 should be as close as possible to the first through hole 12 and the second through hole 13, so that the gas in the first cavity 3 and the second cavity 4 can be fully circulated.

[0028] When the circulation fan 6 is working, the internal gas starts to circulate, the gas in the first area 41 enters the first cavity 3 through the first through hole 12, and then enters the second area 42 through the second through hole 13, and then the gas in the second area 42 returns to the first area 41 through the circulation fan 6 to complete the circulation.

[0029] The outer wall 2 of the kiln is provided with a cooling water pipe 21, which is connected to the outer wall 2. In the preferred embodiment, the cooling water pipe 21 is arranged on the outer side of the outer wall 2 and is connected to the outer wall 2 by a clamp 22. The cross section of the cooling water pipe 21 is generally circular, and when it is attached to the outer wall 2, the contact area is small and the heat exchange effect is poor. Even if the cooling water pipe 21 is replaced by a square shape, the area of the cooling water pipe 21 attached to the outer wall 2 is limited, and the heat exchange effect cannot be improved. Embedding the cooling water pipe 21 in the outer wall 2 or other ways to increase the contact area between the cooling water pipe 21 and the outer wall 2 will increase the manufacturing cost of the outer wall 2. Therefore, in this embodiment, the clamp 22 is arranged to completely cover or mostly cover the cooling water pipe 21 and is connected to the outer wall 2 at the same time. The gap between the clamp 22 and the outer wall 2 is filled with a heat-conducting material 23, such as silicone cement. The heat of the outer wall 2 can be directly conducted to the cooling water pipe 21 through the filled heat-conducting material 23, greatly improving the cooling efficiency.

[0030] The cooling principle of the kiln is as follows: under the driving of the circulating fan 6, the gas in the second area 42 is sucked into the first area 41, the gas in the first area 41 enters the first cavity 3 through the first through hole 12, and the gas in the first cavity 3 enters the second area 42 through the second through hole 13, thereby forming internal circulation of the gas. At the same time, the cooling water pipe 21 of the outer wall 2 is constantly filled with cooling water; the heat of the outer wall 2 is transferred to the cooling water through the heat-conducting material 23 between the clamp 22, the inner wall 1 and the cooling water pipe 21, and is taken away by the cooling water; at the same time, the heat of the gas in the second cavity 4 exchanges with the outer wall 2 to cool the gas in the second cavity 4. When the gas in the second cavity 4 and the first cavity 3 circulates, the cooling of the gas in the first cavity 3 is completed to realize the cooling of the product and the overall cooling of the kiln.

[0031] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application, therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A high-efficiency, low-energy-consumption kiln cooling structure, the kiln comprising an inner wall and an outer wall, wherein a first cavity is formed on the inner side of the inner wall, and the product is placed in the first cavity; a second cavity is formed between the outer wall and the inner wall, characterized in that: The second cavity is provided with a circulating fan, which drives the gas in the first cavity and the second cavity to circulate and flow. The second cavity is provided with a baffle, which divides the second cavity into a first area and a second area; the circulating fan is connected with the baffle and communicates the first area and the second area; the outer wall is provided with a cooling water pipe, which is connected to the outer wall in a close fit.

2. The high-efficiency, low-energy kiln cooling structure according to claim 1, characterized in that: The inner wall is provided with at least a first through hole, which communicates the first cavity and the first area, and a second through hole, which communicates the first cavity and the second area; when the gas circulates, the gas in the first area enters the first cavity through the first through hole and then enters the second area through the second through hole.

3. The high efficiency, low energy consumption kiln cooling structure of claim 1, wherein: The circulating fan is connected to the outer wall, and the driving part of the circulating fan is arranged outside the outer wall.

4. The high efficiency, low energy consumption kiln cooling structure according to claim 2, wherein: The baffle is arranged in a Z shape, including a first separation section, a second separation section and a third separation section, the first separation section and the third separation section are parallel to each other and perpendicular to the second separation section; the first separation section is connected to the inner side of the outer wall, the third separation section is connected to the outer side of the inner wall, and the second separation section is connected to the circulating fan.

5. The high efficiency, low energy consumption kiln cooling structure according to claim 4, wherein: The baffle is arranged at the upper end of the inner wall; the first through hole and the second through hole are arranged at the two sides of the inner wall, respectively.

6. The high efficiency, low energy consumption kiln cooling structure according to claim 1, wherein: The cooling water pipe is arranged outside the outer wall and is connected to the outer wall by a clamp.

7. The high efficiency, low energy consumption kiln cooling structure according to claim 6, wherein: The clamp covers the cooling water pipe, and the gap between the clamp and the outer wall is filled with a heat-conducting material.

8. The high efficiency, low energy consumption kiln cooling structure of claim 1, wherein: The outer side of the inner wall is provided with a support flange, which is perpendicular to the inner wall.

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