Air cooling system structure of push plate furnace

Abstract

The utility model relates to the technical field of pushed slab furnace cooling, in particular to an air cooling system structure of a pushed slab furnace, which is characterized in that a hearth shell and a hearth liner are detachably nested to form a cooling air sleeve; a cooling air sleeve interlayer is formed between the hearth outer shell and the hearth inner container, a cooling fan is installed at the bottom of the hearth outer shell, a plurality of sets of cooling fins are arranged on the periphery of the surface of the hearth inner container, and the cooling fins are arranged in the cooling air sleeve interlayer in a protruding mode. The cooling fan is additionally arranged at the bottom of the hearth shell, cooling air provided by the cooling fan enters the cooling air sleeve interlayer from the bottom and is exhausted from the top of the hearth shell, a cooling loop is formed, heat circulation is increased, and the heat dissipation efficiency is improved. The radiating fins are distributed on the outer wall of the hearth liner, so that the heat exchange area is increased, and the radiating efficiency is improved; the cooling fins are located in an air cooling loop of the cooling fan, and the heat exchange efficiency of the cooling fins is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling of pusher furnaces, and particularly relates to a structure of an air cooling system for a pusher furnace. Background Art

[0002] A pusher kiln furnace, also known as a pusher furnace, uses high-quality refractory heat-insulating materials and a furnace lining structure, and is widely applicable to the calcination, roasting, synthesis, sintering, and high-temperature heat treatment of various materials under various atmosphere conditions.

[0003] The cooling and temperature reduction section of the pusher furnace is a section of the furnace body connected to the heat preservation section, and the sintered material is cooled in this section of the furnace body.

[0004] However, for the currently used temperature reduction section, the actual cooling effect is not good. Only relying on the heat exchange between the circumferential surface of the inner furnace lining and the outside, the heat dissipation area is small, the cooling cycle is long, and the temperature reduction effect on the furnace lining is poor. In addition, the inner furnace lining and the outer shell are fixedly welded. Affected by temperature changes, the inner furnace lining is prone to deformation and even damage due to thermal expansion and contraction.

[0005] Therefore, based on the problems in the prior art, the utility model provides a structure of an air cooling system for a pusher furnace. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a structure of an air cooling system for a pusher furnace to solve the technical problems in the prior art that the temperature reduction effect of the pusher furnace is poor and the inner furnace lining is prone to deformation and damage due to temperature changes.

[0007] The technical solution of the utility model is: a structure of an air cooling system for a pusher furnace, including a cooling air jacket, the furnace shell and the inner furnace lining are detachably nested to construct the cooling air jacket;

[0008] A cooling air jacket sandwich is formed between the furnace shell and the inner furnace lining. A cooling fan is installed at the bottom of the furnace shell. The cooling air provided by the cooling fan enters the cooling air jacket sandwich from the bottom and is discharged from the exhaust end at the top; wherein, the exhaust end is set as an open structure.

[0009] Preferably, a chimney hood is suspended above the exhaust end. An open gap is formed between the lower end of the chimney hood and the upper end of the exhaust end, and the covering area of the air inlet end at the bottom of the chimney hood in the horizontal plane is larger than the outlet area of the exhaust end.

[0010] Preferably, a plurality of groups of heat dissipation fins are arranged around the surface of the inner furnace lining, and the heat dissipation fins protrude outward into the cooling air jacket sandwich.

[0011] Preferably, the heat dissipation fins are perpendicular to the wall surface of the inner furnace lining, and the length direction of the heat dissipation fins fixed on each wall surface is perpendicular to the length direction of the cooling air jacket;

[0012] A gap space for the gas flowing from bottom to top to circulate is formed between adjacent radiators.

[0013] Preferably, at least one end of the furnace inner liner and the furnace outer shell is connected by a flange. When the furnace inner liner extends out of the furnace outer shell, they are joined and overlapped at the overlapping outer edge without welding.

[0014] Preferably, expansion joints are provided on the side wall of the furnace inner liner, and the expansion joints extend along the radial direction of the furnace inner liner.

[0015] Preferably, a walking plate cavity for the push plate to transmit and move is arranged along the length direction of the furnace inner liner, and a track support frame is arranged at the bottom of the walking plate cavity.

[0016] Preferably, multiple cooling fans are provided and are sequentially distributed along the length direction of the cooling air jacket.

[0017] Compared with the prior art, the advantages of the present utility model are as follows:

[0018] (1) In the present utility model, a cooling air jacket sandwich is constructed between the furnace inner liner and the furnace outer shell, and a cooling fan is added at the bottom of the furnace outer shell. The cooling air provided by the cooling fan enters the cooling air jacket sandwich from the bottom and is discharged from the exhaust end at the top, forming a cooling loop, increasing the heat circulation, and improving the heat dissipation efficiency.

[0019] (2) In the present utility model, radiators are arranged on the peripheral wall surface of the furnace inner liner, and the convex parts of the radiators are placed in the cooling air jacket sandwich, increasing the heat exchange area and improving the heat dissipation efficiency; the radiators are located in the air cooling loop of the cooling fan, improving the heat exchange efficiency of the radiators.

[0020] (3) The exhaust end at the top of the furnace outer shell of the present utility model is set as an open structure. Compared with the exhaust method of arranging a chimney pipe, the heat discharge efficiency is higher, the structure is simpler, and the equipment cost is reduced.

[0021] (4) In the present utility model, by setting expansion joints on the furnace inner liner, the furnace inner liner and the furnace outer shell are spliced and buckled instead of being fixedly connected by welding, leaving expansion space for the furnace inner liner in the horizontal and vertical directions, avoiding deformation or damage of the furnace inner liner. Description of the Drawings

[0022] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0023] Figure 1 It is the left view of the structure of the push plate furnace air cooling system provided by the present utility model;

[0024] Figure 2 It is the front view of the structure of the push plate furnace air cooling system provided by the present utility model;

[0025] Figure 3 Structural schematic diagram of the track support frame provided by the present utility model;

[0026] Wherein: 1, cooling air jacket; 2, cooling fan; 3, heat sink; 4, exhaust end; 5, chimney hood; 6, flange; 7, walking board cavity; 8, track support frame; 9, expansion joint;

[0027] 11, furnace shell; 12, furnace inner liner; 13, cooling air jacket interlayer. Specific embodiments

[0028] The following combines specific embodiments to further elaborate on the content of the present utility model:

[0029] For ease of understanding, first, the application scenario of this application is described. In the cooling section of the pusher furnace, the furnace and the materials inside the furnace are cooled, as well as the problem of deformation of the furnace caused by thermal expansion and contraction due to temperature.

[0030] As Figure 1 shown, a structure of a pusher furnace air cooling system, the furnace shell 11 and the furnace inner liner 12 are nested inside and outside to construct the cooling air jacket 1; a cavity is reserved between the periphery of the main body of the furnace inner liner 12 and the inner wall of the furnace shell 11 to form the cooling air jacket interlayer 13, and the furnace inner liner 12 exchanges heat with the outside through the cooling air jacket interlayer 13 to achieve heat dissipation of the furnace inner liner 12.

[0031] Furthermore, cooling fans 2 are installed at the bottom of the furnace shell 11, and multiple cooling fans 2 are provided and distributed in sequence along the length direction of the cooling air jacket 1. The cooling air provided by the cooling fans 2 enters the cooling air jacket interlayer 13 from the bottom and is discharged from the exhaust end 4 at the top, thereby increasing the heat circulation and improving the heat dissipation efficiency.

[0032] Furthermore, multiple groups of heat sinks 3 are arranged around the surface (top, bottom, left, and right) of the furnace inner liner 12. The convex parts of the heat sinks 3 are placed inside the cooling air jacket interlayer 13, and the heat sinks 3 are perpendicular to the wall surface of the furnace inner liner 12. The length direction of the heat sinks 3 fixed on each wall surface is perpendicular to the length direction of the cooling air jacket 1. A gap space for the gas flowing from bottom to top to circulate is formed between adjacent heat sinks 3, thereby keeping the gas circulation smooth, the air flow passing through each heat sink 3 smoothly, and improving the heat dissipation effect.

[0033] The heat exchanged between the heat sinks 3 and the furnace inner liner 12 is carried out of the exhaust end 4 at the top along with the cooling air. By setting the heat sinks 3, the heat exchange area is increased and the heat dissipation efficiency is improved.

[0034] Among them, the exhaust end 4 at the top of the cooling air jacket 1 is set as an open structure, which can quickly discharge heat and reduce the equipment cost compared with the chimney pipeline structure in the traditional method.

[0035] Above the exhaust end 4, a chimney cover 5 is also suspended. An open gap is formed between the lower end of the chimney cover 5 and the upper end of the exhaust end 4, and the covering area of the intake end at the bottom of the chimney cover 5 in the horizontal plane is larger than the area of the air outlet of the exhaust end 4.

[0036] In addition, affected by temperature, during the operation of the furnace body, due to the thermal expansion and contraction effect, the inner furnace liner 12 will deform. The present embodiment provides the following specific methods to alleviate the problem of deformation of the inner furnace liner.

[0037] Both ends of the inner furnace liner 12 are at least flush with the ends of the furnace shell 11. The inner furnace liner 12 and the furnace shell 11 are not welded, but are respectively connected to the flange 6.

[0038] Refer to the appendix Figure 2 , both ends of the inner furnace liner 12 are directly inserted and fixed on the flange 6, and the main body of the inner furnace liner 12 is integrally erected inside the furnace shell. In this way, after the temperature of the inner furnace liner 12 changes, the inner furnace liner 12 can freely expand and contract along the length direction of the furnace body, avoiding the risk that the inner furnace liner 12 is easily deformed or even damaged due to temperature influence.

[0039] When the inner furnace liner 12 extends out of the furnace shell 11, the end of the inner furnace liner 12 and the outer wall surface of the furnace shell 11 are not welded. Refer to the appendix Figure 2 at A, to allow the inner furnace liner to expand and avoid the deformation of the furnace shell 11 caused by the deformation of the inner furnace liner 12.

[0040] Expansion joints 9 are provided on the side wall of the inner furnace liner 12 to adapt to the thermal expansion of the inner furnace liner 12. The expansion joints 9 extend along the radial direction of the inner furnace liner 12 and are arranged at intervals in multiple numbers to reduce deformation.

[0041] The inner furnace liner 12 is formed by bending and splicing two plates. At the splicing joint of the upper and lower plates, welding is not performed to provide a space for the thermal expansion of the inner furnace liner 12. Moreover, the cavity gap at the splicing joint can also serve as a plate walking cavity gap 7 for the pushing plate to transmit and move in the inner furnace liner 12. The plate walking cavity gap 7 is arranged along the length direction of the inner furnace liner 12. A track support frame 8 is arranged at the bottom of the plate walking cavity gap 7 to provide support for the inner furnace liner 12 and reduce deformation. As shown in the appendix Figure 3 shows a schematic diagram of the track support frame 8 assembled between the inner furnace liner 12 and the furnace shell 11.

[0042] The above embodiments are only used to illustrate the technical concept and characteristics of the present utility model. The purpose is to enable those who are familiar with this technology to understand the content of the present utility model and implement it accordingly, and it should not be used to limit the protection scope of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to encompass all changes that fall within the meaning and scope of the equivalent elements of the claims in the present utility model.

Claims

1. A push plate furnace air cooling system structure, characterized in that: It comprises a cooling air jacket, a furnace shell and a furnace liner are detachably nested to construct the cooling air jacket; A cooling air jacket interlayer is formed between the furnace shell and the furnace liner, and a cooling fan is installed at the bottom of the furnace shell. The cooling air provided by the cooling fan enters the cooling air jacket interlayer from the bottom and is discharged from the exhaust end at the top; wherein the exhaust end is arranged as an open structure.

2. The push plate furnace air cooling system structure according to claim 1 is characterized in that: A chimney cover is also suspended above the exhaust end, an open gap is formed between the lower end of the chimney cover and the upper end of the exhaust end, and the coverage area of ​​the air inlet end at the bottom of the chimney cover in the horizontal plane is larger than the air outlet area of ​​the exhaust end.

3. The push plate furnace air cooling system structure according to claim 2 is characterized in that: A plurality of groups of heat sinks are arranged around the surface of the furnace inner tank, and the heat sinks are protruded outwardly and placed in the cooling air jacket interlayer.

4. The push plate furnace air cooling system structure according to claim 3 is characterized in that: The heat sink is perpendicular to the wall surface of the furnace liner, and the length direction of the heat sink fixed on each wall surface is perpendicular to the length direction of the cooling air jacket; A gap space is formed between adjacent heat sinks for the gas flowing from bottom to top to circulate.

5. The push plate furnace air cooling system structure according to claim 3 is characterized in that: At least one end of the furnace liner and the furnace shell is connected by a flange, and when the furnace liner extends out of the furnace shell, the overlapping outer edges of the furnace liner and the furnace shell are spliced ​​and overlapped without welding.

6. The push plate furnace air cooling system structure according to claim 1 is characterized in that: An expansion joint is provided on the side wall of the furnace inner liner, and the expansion joint extends along the radial direction of the furnace inner liner.

7. The push plate furnace air cooling system structure according to claim 1 is characterized in that: A board-walking cavity for the push plate to move is arranged on the furnace inner shell along the length direction, and a track support frame is arranged at the bottom of the board-walking cavity.

8. The push plate furnace air cooling system structure according to claim 1 is characterized in that: The cooling fans are arranged in plurality and are distributed in sequence along the length direction of the cooling air jacket.

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