Industrial kiln with heat circulation structure

Abstract

The utility model provides an industrial kiln with a heat circulation structure, which comprises a kiln body, air supply components and an air guide component, the left outer wall and the right outer wall of the kiln body are respectively and fixedly provided with one air supply component for conveying air and oxygen, and the right end of the kiln body is movably provided with the air guide component. Compared with the prior art, the kiln has the advantages that by arranging the kiln body and the air supply assembly, local thermal stress aggravation caused by local temperature concentration in the kiln body is avoided, the uniform distribution of the temperature in the kiln body is greatly improved, products can be heated more uniformly by the kiln body, and all heat is effectively prevented from being directly and intensively released at one end of the kiln body; and due to the arrangement of the air guide assembly, a plurality of heat conduction holes distributed in an annular structure in an air guide pipe are sprayed to the left side of the furnace body, so that heat circulation is formed between the outer side and the inner side of the interior of the furnace body, and the uniformity of the temperature in the furnace body is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial furnaces, and particularly relates to an industrial furnace with a heat circulation structure. Background Art

[0002] During the long-term high-temperature operation of a furnace, if too much heat accumulates, it is easy to cause the local temperature to be too high, exceeding the tolerance limit of the material, leading to equipment damage or failure. Overheating is usually caused by the untimely heat dissipation inside the furnace or the unreasonable design of the cooling system, which fails to effectively dissipate heat. Secondly, local thermal stress is also a significant drawback. The accumulation of heat in some parts of the furnace is likely to cause a sharp rise in the local temperature, forming thermal stress, which causes the material to expand and contract, resulting in cracks or deformation of the furnace structure. This situation is usually caused by the unreasonable internal structure of the furnace or the uneven distribution of hot air flow. Finally, uneven heat distribution is also a problem that cannot be ignored. The accumulation of heat leads to an uneven temperature field distribution inside the furnace, affecting the uniform heating of products and the quality consistency. This problem is mainly caused by the unreasonable design of the furnace, the complex internal structure, or the improper setting of operating parameters.

[0003] Conventional countermeasures include optimizing the furnace design, improving the cooling system, and enhancing the operating level. For example, by adopting an efficient cooling system, increasing cooling channels, and optimizing the structural design, overheating and heat accumulation can be effectively prevented; by improving the internal structure design of the furnace and reasonably arranging heat sources and cooling devices, local thermal stress can be reduced, and the structural stability of the furnace can be improved; by optimizing the hot air flow distribution and reasonably setting operating parameters, uniform heat distribution can be achieved, and the product quality can be improved. However, these methods also have certain drawbacks. Although optimizing the furnace design and improving the cooling system can effectively prevent heat accumulation, they will increase the initial construction cost and maintenance cost. The operation and maintenance of the cooling system also require additional energy consumption and management input; enhancing the operating level can improve heat distribution and reduce local thermal stress, but it requires continuous personnel training and management, increasing labor costs and management difficulties; although optimizing the internal structure design and hot air flow distribution can improve the heat accumulation problem, the complexity of the furnace structure may lead to an increase in maintenance and operation complexity, and precise control and adjustment are required in actual operation, increasing the operation difficulty and cost. Therefore, we hope to design an industrial furnace with a new structure to solve this problem. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide an industrial furnace with a heat circulation structure to solve the problems raised in the above background art.

[0005] The utility model is realized through the following technical solutions: An industrial furnace with a heat circulation structure, comprising: a furnace body, a air supply component, and a air guiding component. A air supply component for transporting air and oxygen is respectively fixed on the left outer wall and the right outer wall of the furnace body, and a air guiding component is movably installed at the right end of the furnace body;

[0006] The furnace body includes a furnace shell, a combustion chamber, and an external air guiding sleeve. A combustion chamber is arranged at the left end of the furnace shell, an external air guiding sleeve is arranged at the left end of the combustion chamber, and a plurality of split-type heating pipes are installed inside the external air guiding sleeve;

[0007] The air supply component includes an air duct and inclined pipes. A plurality of equally spaced inclined pipes are fixed on the right side of the air duct;

[0008] The air guiding component includes a furnace door and an air guiding pipe. An air guiding pipe is arranged in the middle of the inner wall of the furnace door.

[0009] As a preferred embodiment, a sealing partition wall is arranged inside the left end of the furnace shell. A flow guiding cover is arranged in the middle on the left side of the sealing partition wall at the left end of the furnace shell. The cross section of the flow guiding cover is in a bullet-shaped structure. The flow guiding cover can guide the heat airflow and the unburned combustion medium generated in the combustion chamber into the flow guiding pipe and the combustion pipe, avoiding the direct release of all heat at one end of the furnace shell and preventing excessive heat concentration.

[0010] As a preferred embodiment, a plurality of equally distributed flow guiding pipes are arranged at the right edge of the flow guiding cover. The right ends of the flow guiding pipes penetrate through the flow guiding cover and the sealing partition wall and extend into the inside of the left end of the furnace shell.

[0011] As a preferred embodiment, a plurality of equally distributed combustion pipes are arranged inside the outer wall of the furnace shell. A plurality of linearly distributed inclined holes are formed in each combustion pipe inner wall and inclined at an angle of 45 degrees towards the inside of the furnace shell;

[0012] The combustion pipe is communicated with the inside of the furnace shell through the inclined holes, and the left end of the combustion pipe is communicated with the inside of the combustion chamber.

[0013] As a preferred embodiment, the rear side of the air duct is connected to the air outlet of an external fan, and an oxygen supply pipe is additionally arranged at the rear side of the air duct. The number and distribution positions of the inclined pipes on each air duct are matched with the number and distribution positions of the combustion pipes. The setting of the air supply component can increase oxygen and high-speed airflow inside the combustion pipe, accelerate the heat flow rate inside the combustion pipe, and at the same time can provide additional oxygen to enable the complete combustion of the unburned part of the fuel medium.

[0014] As a preferred embodiment, the inner end of the inclined pipe extends through the outer wall of the furnace shell and inclines 60 degrees to the right and extends to the outside of the inner wall of the combustion pipe, and the inner end of the inclined pipe is flush with the inner wall of the combustion pipe.

[0015] As a preferred embodiment, the furnace door is movably installed at the right end of the furnace body. A plurality of connecting channels are equally divided and arranged at the edge of the left surface of the furnace door, and a collecting chamber is arranged in the middle of the furnace door.

[0016] A plurality of heat conduction holes are formed through the edge of the air guide pipe from left to right. The right end of the heat conduction hole is communicated with the collecting chamber, and the heat conduction hole is horizontally parallel to the furnace body.

[0017] After adopting the above technical solution, the beneficial effect of the present utility model is that by arranging the kiln furnace body and the air supply assembly, finally under the action of the air guide pipe, it surges from the inside of the right end of the furnace body to the left, so that a heat cycle is formed inside the furnace body, avoiding the aggravation of local thermal stress caused by the concentration of local temperature inside the furnace body, greatly improving the uniform distribution of the temperature inside the furnace body, making the heating of the products in the furnace body more uniform, effectively preventing all the heat from being directly released concentrated at one end of the furnace body, and avoiding excessive heat concentration.

[0018] With the setting of the air guide assembly, after the distributed heat and the formed air flow inside the plurality of combustion tubes enter the collecting chamber through the plurality of connecting channels, they will gush out to the left side of the furnace body through the plurality of heat conduction holes distributed in an annular structure on the air guide pipe, thereby forming a heat cycle between the outside and the inside of the furnace body, which helps to improve the uniformity of the temperature inside the furnace body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of an industrial kiln furnace with a heat cycle structure according to the present utility model.

[0021] Figure 2 It is a schematic diagram of the internal structure of an industrial kiln furnace with a heat cycle structure according to the present utility model.

[0022] Figure 3 It is a schematic diagram of the left end structure of the furnace body of an industrial kiln furnace with a heat cycle structure according to the present utility model.

[0023] Figure 4 It is a schematic diagram of the air guide assembly structure of an industrial kiln furnace with a heat cycle structure according to the present utility model.

[0024] Figure 5 It is a schematic diagram of the left view structure of the furnace door of an industrial kiln furnace with a heat cycle structure according to the present utility model.

[0025] In the figure, 100 is the kiln body, 110 is the furnace body, 120 is the combustion chamber, 130 is the external draft sleeve, 140 is the guide cover, 141 is the guide pipe, 150 is the combustion pipe, and 151 is the inclined hole;

[0026] 200-air supply assembly, 210-air duct, 220-oblique pipe;

[0027] 300-air guide assembly, 310-furnace door, 311-connecting channel, 312-collecting chamber, 320-air guide duct, 321-heat conduction hole. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figures 1 to 5 The utility model provides a technical solution: an industrial kiln with a heat circulation structure, comprising: a kiln body 100, an air supply assembly 200 and an air guide assembly 300, an air supply assembly 200 for conveying air and oxygen is fixed to the left outer wall and the right outer wall of the kiln body 100 respectively, and an air guide assembly 300 is movably installed at the right end of the kiln body 100;

[0030] The kiln body 100 includes a furnace body 110, a combustion chamber 120 and an external induced draft sleeve 130. The combustion chamber 120 is disposed at the left end of the furnace body 110. The external induced draft sleeve 130 is disposed at the left end of the combustion chamber 120. A plurality of split-flow heating pipes are installed inside the external induced draft sleeve 130.

[0031] The air supply assembly 200 includes an air duct 210 and an oblique tube 220. A plurality of oblique tubes 220 distributed at equal intervals are fixed to the right side of the air duct 210.

[0032] The air guide assembly 300 includes a furnace door 310 and an air guide duct 320 . The air guide duct 320 is disposed in the middle of the inner wall of the furnace door 310 .

[0033] See also Figures 1 to 5, a sealing partition wall is arranged inside the left end of the furnace body 110. In the middle on the left side of the sealing partition wall at the left end of the furnace body 110, a flow guide cover 140 is arranged. The cross-section of the flow guide cover 140 is in a bullet-shaped structure. The flow guide cover 140 can guide the heat airflow and the unburned combustion medium generated in the combustion chamber 120 into the inside of the flow guide pipe 141 and the combustion pipe 150, avoiding the direct release of all heat at one end of the furnace body 110 and preventing excessive heat concentration.

[0034] A plurality of equally distributed flow guide pipes 141 are arranged at the right edge of the flow guide cover 140. The right ends of the flow guide pipes 141 penetrate through the flow guide cover 140 and the sealing partition wall to extend into the inside of the left end of the furnace body 110 to the right.

[0035] A plurality of equally distributed combustion pipes 150 are arranged inside the outer wall of the furnace body 110. A plurality of linearly distributed inclined holes 151 are formed in the inner wall of each combustion pipe 150 and are inclined at an angle of 45 degrees towards the inside of the furnace body 110.

[0036] The combustion pipe 150 is communicated with the inside of the furnace body 110 through the inclined holes 151, and the left end of the combustion pipe 150 is communicated with the inside of the combustion chamber 120.

[0037] The rear side of the air duct 210 is connected to the air outlet of the external fan. An oxygen supply pipe is additionally arranged at the rear side of the air duct 210. The number and distribution positions of the inclined pipes 220 on each air duct 210 are matched with the number and distribution positions of the combustion pipes 150. The setting of the air supply assembly 200 can increase oxygen and high-speed airflow into the inside of the combustion pipe 150, accelerate the heat flow rate inside the combustion pipe 150, and at the same time can provide additional oxygen to make the unburned part of the fuel medium burn completely.

[0038] The inner end of the inclined pipe 220 extends into the outside of the inside of the combustion pipe 150 by penetrating through the outer wall of the furnace body 110 and inclining 60 degrees to the right. The inner end of the inclined pipe 220 is flush with the inner wall of the combustion pipe 150.

[0039] As the first embodiment of the present utility model, in actual use, the combustion chamber 120 at the left end of the furnace body 110 provides a combustion medium through a plurality of shunt-type heat supply pipes inside the externally connected air guide sleeve 130, and combustion occurs in the combustion chamber 120. The generated heat and air flow will impact towards the left end of the furnace body 110. Under the shunt action of the flow guide cover 140, a small part of the heat air flow and unburned combustion medium generated in the combustion chamber 120 enters the flow guide pipe 141, and the rest all enters the inside of the combustion pipe 150 on the inner wall of the furnace body 110. The part of the heat entering from the flow guide pipe 141 moves to the right along the inner edge of the furnace body 110 and enters the rest of the combustion pipe 150. Under the action of supplying air and oxygen by a plurality of inclined pipes 220 on the two air pipes 210, oxygen and high-speed air flow can be added to the inside of the combustion pipe 150, accelerating the heat flow rate inside the combustion pipe 150, and at the same time, additional oxygen can be provided to enable the complete combustion of the unburned part of the fuel medium;

[0040] Part of the heat and air flow entering the inside of the furnace body 110 from the inclined holes 151 on the inner side of the combustion pipe 150 can carry part of the oxygen to burn with the unburned medium entering from the flow guide pipe 141, enabling the inner edge of the furnace body 110 to have uniform heat and the heat to move to the right. Part of the heat and high-speed air flow that is not discharged inside the combustion pipe 150 will move towards the air guide assembly 300, and finally surge from the left inside the right end of the furnace body 110 under the action of the air guide pipe 320, forming a heat cycle inside the furnace body 110, avoiding the aggravation of local thermal stress caused by local temperature concentration inside the furnace body 110, greatly improving the uniform distribution of the temperature inside the furnace body 110, making the furnace body 110 heat the product more evenly, effectively preventing all the heat from being directly released concentrated at one end of the furnace body 110, and avoiding excessive heat concentration.

[0041] Please refer to Figure 2 、 Figure 4 and Figure 5 As shown in, the furnace door 310 is movably installed at the right end of the furnace body 110. A plurality of connection channels 311 are equally divided and arranged on the edge of the left side surface of the furnace door 310, and a collecting cavity 312 is arranged in the middle of the furnace door 310;

[0042] A plurality of heat conduction holes 321 are formed through the edge of the air guide pipe 320 from left to right. The right end of the heat conduction hole 321 is communicated with the collecting cavity 312, and the heat conduction hole 321 is horizontally parallel to the furnace body 110.

[0043] As the second embodiment of the present utility model, based on the above first embodiment, with the arrangement of the air guiding assembly 300, after the distributed heat inside the multiple combustion tubes 150 and the formed air flow enter the collecting cavity 312 through the multiple connecting channels 311, they will spout towards the left side of the furnace body 110 through the multiple heat conduction holes 321 distributed in an annular structure on the air guiding pipe 320 (the heat ejected from the inside of the air guiding pipe 320 is much less than the heat discharged through the inclined holes 151 of the combustion tubes 150. When the furnace door 310 is opened, the combustion chamber 120 can be temporarily closed to avoid the danger of blanking), thereby enabling a heat cycle to be formed between the outer and inner sides of the furnace body 110, which helps to improve the temperature uniformity inside the furnace body 110.

[0044] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An industrial kiln with a heat circulation structure, comprising: A kiln body (100), an air supply assembly (200) and an air guide assembly (300), characterized in that an air supply assembly (200) for conveying air and oxygen is respectively fixed to the left outer wall and the right outer wall of the kiln body (100), and an air guide assembly (300) is movably installed at the right end of the kiln body (100); The kiln body (100) comprises a furnace body (110), a combustion chamber (120) and an external induced draft sleeve (130); the combustion chamber (120) is arranged at the left end of the furnace body (110); the external induced draft sleeve (130) is arranged at the left end of the combustion chamber (120); a plurality of split-flow heating pipes are installed inside the external induced draft sleeve (130); The air supply assembly (200) comprises an air duct (210) and an oblique tube (220), wherein a plurality of oblique tubes (220) distributed at equal intervals are fixed to the right side of the air duct (210); The air guide assembly (300) comprises a furnace door (310) and an air guide duct (320), and the air guide duct (320) is arranged in the middle of the inner wall of the furnace door (310).

2. The industrial kiln furnace with a heat circulation structure according to claim 1, wherein: A sealed partition wall is arranged inside the left end of the furnace body (110), and a flow guide cover (140) is arranged in the middle of the left side of the sealed partition wall at the left end of the furnace body (110). The cross section of the flow guide cover (140) is in a bullet-shaped structure.

3. The industrial kiln furnace with a heat circulation structure according to claim 2, characterized in that: A plurality of equally distributed flow guide pipes (141) are arranged on the right edge of the flow guide cover (140), and the right end of the flow guide pipe (141) penetrates the flow guide cover (140) and the sealing partition wall to the right and extends to the inside of the left end of the furnace body (110).

4. The industrial furnace with a heat circulation structure according to claim 1, characterized in that: A plurality of equally distributed combustion tubes (150) are arranged inside the outer wall of the furnace body (110), and the inner wall of each combustion tube (150) is inclined at 45 degrees toward the inside of the furnace body (110) and is provided with a plurality of linearly distributed inclined holes (151); The combustion tube (150) is in communication with the interior of the furnace body (110) through the inclined hole (151), and the left end of the combustion tube (150) is in communication with the interior of the combustion chamber (120).

5. The industrial kiln with a heat circulation structure according to claim 1, characterized in that: The rear side of the air duct (210) is connected to an external air outlet of a fan, and an oxygen supply pipe is also provided on the rear side of the air duct (210). The number and distribution positions of the inclined tubes (220) on each of the air ducts (210) match the number and distribution positions of the combustion tubes (150).

6. The industrial kiln furnace with a heat circulation structure according to claim 5, characterized in that: The inner end of the inclined tube (220) is inclined rightward at 60 degrees, passes through the outer wall of the furnace body (110) and extends to the inside and outside of the combustion tube (150). The inner end of the inclined tube (220) is flush with the inner wall of the combustion tube (150).

7. The industrial kiln furnace with a heat circulation structure according to claim 6, wherein: The furnace door (310) is movably installed at the right end of the furnace body (110); a plurality of connecting channels (311) are equally divided on the edge of the left surface of the furnace door (310); and a collecting chamber (312) is arranged in the middle of the furnace door (310); A plurality of heat-conducting holes (321) are formed through the edge of the air-conducting pipe (320) from left to right, the right end of the heat-conducting hole (321) is connected to the collecting cavity (312), and the heat-conducting hole (321) is horizontally parallel to the furnace body (110).

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