High-temperature sintering furnace

Abstract

A high-temperature sintering furnace comprises a box body, two air inlet sieve plates are arranged in the box body in a spaced mode and divide the box body into a first cavity, a second cavity and a third cavity, a horizontal baffle is arranged between the top edges of the two air inlet sieve plates, the two air inlet sieve plates are divided into a first horizontal air flue and a second horizontal air flue through a partition plate, and the horizontal air flues are provided with flow dividing devices which comprise flow dividing cylinders and flow dividing channels. The upstream ends of the flow dividing barrels are communicated with the second cavity, the downstream ends of the flow dividing barrels are sealed, the two ends of the flow dividing channel are communicated with the two ends of the horizontal air channel respectively, a plurality of heating pipes are arranged in the first cavity and the third cavity, a plurality of sintering goods shelves are arranged in the second cavity, impellers of the first circulating fan and the second circulating fan are arranged in the corresponding flow dividing barrels, and the moisture removing fan is located in the air exhausting barrel. The device is simple in structure and low in operation cost, uniform sintering of FEP mold pressing materials in trays on a goods shelf can be guaranteed, and the actual requirements of enterprises are met.

Description

Technical Field

[0001] The invention relates to the field of chemical industry, and in particular to a high-temperature sintering furnace. Background Art

[0002] The FEP production line of chemical enterprises is equipped with a sintering furnace. The basic principle of the sintering furnace currently used is to use high-temperature radiation tubes as thermal energy, and use circulating fans to force air convection heat exchange to transfer heat to the material. When the oven rises to the set temperature, in order to achieve the purpose of heat preservation and constant temperature, the circulating fan needs to maintain the driving strength. In addition, the circulating hot air enters from one side of the sintering shelf and is discharged from the other side of the sintering shelf. This working mode causes high energy consumption in the constant temperature stage of the sintering furnace, and cannot guarantee the sintering effect of the FEP molding resin supported in the sintering shelf tray. In addition, if the circulating fan fails, it will cause serious heat accumulation around the high-temperature radiation tube, posing a serious safety hazard.

[0003] Therefore, how to design a high-temperature sintering furnace that is safe, has low energy consumption, and can perform uniform sintering is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0004] The purpose of the present invention is to provide a high-temperature sintering furnace with a simple structure and low operating cost to address the deficiencies of the prior art, and to ensure uniform sintering of FEP molded materials in trays on shelves to meet the actual needs of enterprises.

[0005] The technical solution of the present invention is: a high-temperature sintering furnace, comprising a box body, wherein two air inlet sieve plates are arranged at intervals along the length direction of the box body, the two air inlet sieve plates extend in the vertical direction, and are spaced apart from the top surface of the box body, so as to divide the internal space of the box body into a first chamber, a second chamber, and a third chamber, the first chamber and the third chamber form a vertical air duct, a horizontal baffle is arranged between the top edges of the two air inlet sieve plates, so that there is a spacing space between the top surface of the box body and the horizontal baffle, and the spacing space is divided into a first horizontal air duct and a second horizontal air duct by a partition, and a diversion device is arranged in the first horizontal air duct and the second horizontal air duct to separate the corresponding horizontal air ducts, and the diversion device comprises a diversion cylinder, A diversion channel, wherein the diversion cylinder is arranged in the diversion channel, the upstream end of the diversion cylinder is connected with the second chamber, and the downstream end is sealed, a plurality of exhaust ports are arranged on the side wall of the diversion cylinder, and the two ends of the diversion channel are respectively connected with the two ends of the horizontal air duct, an exhaust cylinder is arranged on the top of the second chamber, the upstream end of the exhaust cylinder is connected with the second chamber, and the downstream end extends out of the box body, a plurality of heating tubes are arranged in the first chamber and the third chamber, a plurality of sintering shelves are arranged in the second chamber, a first circulation fan, a second circulation fan, and a dehumidification fan are arranged on the top of the box body, the impellers of the first circulation fan and the second circulation fan are arranged in the corresponding diversion cylinders, and the dehumidification fan is located in the exhaust cylinder.

[0006] The shunt channel includes a first baffle and a second baffle. One end of the first baffle is connected to one side wall of the corresponding horizontal air duct, and one end of the second baffle is connected to the other side wall of the corresponding horizontal air duct. The extended ends of the first baffle and the second baffle are located on both sides of the shunt cylinder and are tangent to the side wall of the shunt cylinder.

[0007] Both the first baffle and the second baffle are vertically distributed along the length direction of the horizontal air duct.

[0008] An air supply pipe is arranged in the area of the box side wall corresponding to the second chamber and is controlled to open and close through a one-way valve.

[0009] The heating pipe is U-shaped and extends in the vertical direction.

[0010] The exhaust cylinder is arranged in the middle of the top of the second chamber, and the two shunt cylinders are symmetrically distributed along the exhaust cylinder.

[0011] Adopting the above technical solution has the following beneficial effects:

[0012] 1. The high-temperature sintering furnace includes a box body, in which two air inlet sieve plates are arranged at intervals along the length direction. The two air inlet sieve plates extend in the vertical direction and have a spacing distance from the top surface of the box body, so as to divide the internal space of the box body into a first chamber, a second chamber, and a third chamber. The air inlet sieve plates are used to separate the spaces without blocking the flow of gas. The first chamber and the third chamber form a vertical air duct, that is, the heated hot air in the first chamber and the third chamber can enter from the air inlet sieve plates on both sides of the second chamber, and the second chamber is heated evenly to ensure the sintering quality. A horizontal baffle is arranged between the top edges of the two air inlet sieve plates, so that there is a spacing space between the top surface of the box body and the horizontal baffle plate, and the spacing space is divided into a first horizontal air duct and a second horizontal air duct by a partition, that is, the two ends of the first horizontal air duct and the second horizontal air duct are respectively connected to the top of the first chamber and the second chamber. The first horizontal air duct and the second horizontal air duct are both provided with a diverter device to separate the corresponding horizontal air duct, that is, the two horizontal air ducts are divided into two sections by the corresponding diverter device. The diverter device includes a diverter tube and a diverter channel. The diverter tube is arranged in the diverter channel. The upstream end of the diverter tube is connected to the second chamber and the downstream end is sealed. The side wall of the diverter tube is provided with a plurality of exhaust ports, that is, the top of the second chamber is connected to the corresponding diverter channel through the diverter tube. The two ends of the diverter channel are respectively connected to the two ends of the horizontal air duct, that is, by setting the diverter device, the top of the second chamber is respectively connected to the top of the first chamber and the third chamber, and the top of the first chamber and the third chamber is in a disconnected state. The top of the second chamber is provided with an exhaust pipe, the upstream end of the exhaust pipe is connected to the second chamber, and the downstream end extends out of the box body, which is used to discharge humid air to the outside. The first chamber and the third chamber are both provided with a plurality of heating pipes, that is, the two vertical air duct areas generate heat. The second chamber is provided with a plurality of sintering shelves for placing trays and supporting FEP molding material resin. The top of the box is provided with a first circulation fan, a second circulation fan, and a dehumidification fan. The impellers of the first circulation fan and the second circulation fan are arranged in the corresponding shunt tube. The air at the top of the second chamber is extracted through the impeller of the circulation fan, and enters the first chamber and the third chamber respectively through a plurality of exhaust ports on the side wall of the shunt tube and the two ends of the shunt channel. The heated air is heated by the heating pipes in the first chamber and the third chamber. The heated hot air enters the second chamber through the air inlet sieve plates on both sides of the second chamber, sintering the FEP molding material resin on the sintering shelves and ensuring the sintering quality. The hot air after heat exchange in the second chamber enters the shunt channel through the shunt tube to form a forced convection cycle, with low use cost. The first circulation fan and the second circulation fan can serve as backup for each other, effectively avoiding heat accumulation in the first chamber and the third chamber. The dehumidification fan is located in the exhaust duct. During the heating and drying stage, the humid air can be discharged to the outside through the dehumidification fan according to the drying process requirements to meet the production needs of the FEP production line.

[0013] 2. The shunt channel includes a first baffle and a second baffle. One end of the first baffle is connected to one side wall of the corresponding horizontal air duct, and one end of the second baffle is connected to the other side wall of the corresponding horizontal air duct. The extended ends of the first baffle and the second baffle are located on both sides of the shunt cylinder and are tangent to the side wall of the shunt cylinder. The shunt channel with this structure is simple in structure and low in transformation cost. On the basis of achieving the partition of the corresponding horizontal air duct, it is also convenient to install the shunt cylinder, as well as the corresponding first circulation fan and second circulation fan.

[0014] 3. A supply air pipe is arranged in the area of the box side wall corresponding to the second chamber, and its opening and closing are controlled by a one-way valve. During the heating and drying stage, if the amount of humid air discharged through the exhaust cylinder is relatively large, causing the pressure difference inside and outside the box to exceed the opening pressure of the one-way valve, the one-way valve will open and supply fresh air to the inside of the box. This structure can not only meet the sintering requirements of the sintering furnace, but also effectively reduce the number of motors and simplify the structure, thereby reducing the use cost and maintenance cost of the sintering furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present invention;

[0016] Figure 2 is Figure 1 the top view of

[0017] In the drawings, 1 is the box body, 2 is the air inlet sieve plate, 3 is the first chamber, 4 is the second chamber, 5 is the third chamber, 6 is the horizontal baffle, 7 is the first horizontal air duct, 8 is the second horizontal air duct, 9 is the shunt device, 10 is the shunt cylinder, 11 is the shunt channel, 11a is the first baffle, 11b is the second baffle, 12 is the exhaust cylinder, 13 is the heating pipe, 14 is the sintering shelf, 15 is the first circulation fan, 16 is the second circulation fan, 17 is the moisture exhaust fan, 18 is the supply air pipe, and 19 is the one-way valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] See Figure 1 and Figure 2, which is a specific embodiment of a high-temperature sintering furnace. The high-temperature sintering furnace includes a box body 1. Obviously, the front side wall of the box body can be opened, and the box body is correspondingly provided with an insulation layer. The openable side wall forms a box door, and a sealing strip is provided between the box door and the side wall. It can be designed according to the conventional method. Two air inlet sieve plates 2 are arranged in the box body 1 along the length direction. The two air inlet sieve plates 2 extend in the vertical direction and have a spacing distance from the top surface of the box body, dividing the internal space of the box body into a first chamber 3, a second chamber 4, and a third chamber 5. The first chamber 3 and the third chamber 5 form a vertical air duct. Usually, the distance between the two air inlet sieve plates and the left and right walls of the box body is small, so that the width of the first chamber and the third chamber is small, while the width of the second chamber is large, which is conducive to placing sintering shelves. The area of ​​the box side wall corresponding to the second chamber 4 is provided with an air supply pipe 18, and the opening and closing is controlled by a one-way valve 19. A horizontal baffle 6 is arranged between the top edges of the two air inlet sieve plates 2, so that there is a spacing space between the top surface of the box and the horizontal baffle, and the spacing space is divided into a first horizontal air duct 7 and a second horizontal air duct 8 by a partition. In this embodiment, the partition is arranged in the middle of the spacing space between the top surface of the box and the horizontal baffle, and extends along the horizontal direction of the box, so that the first horizontal air duct and the second horizontal air duct are of equal width. The first horizontal air duct 7 and the second horizontal air duct 8 are both provided with a diverter device 9 to separate the corresponding horizontal air ducts. The diverter device 9 includes a diverter tube 10 and a diverter channel 11. The diverter tube 10 is arranged in the diverter channel 11. The upstream end of the diverter tube 10 is connected to the second chamber 4 and the downstream end is sealed. The side wall of the diverter tube 10 is provided with a plurality of exhaust ports. The two ends of the diverter channel 11 are respectively connected to the two ends of the horizontal air duct. In this embodiment, the diverter channel 11 includes a first baffle 11a and a second baffle 11b. One end of the first baffle 11a is connected to one side wall of the corresponding horizontal air duct, and one end of the second baffle 11b is connected to the other side wall of the corresponding horizontal air duct. The first baffle 11a and the second baffle 11b are both distributed vertically to the length direction of the horizontal air duct. The extending ends of the first baffle 11a and the second baffle 11b are located on both sides of the diverter tube 10 and are tangent to the side wall of the diverter tube 10. An exhaust duct 12 is provided at the top of the second chamber 4, and the upstream end of the exhaust duct 12 is connected to the second chamber 4, and the downstream end extends out of the box body 1. A plurality of heating tubes 13 are provided in the first chamber 3 and the third chamber 5, and these heating tubes 13 are U-shaped and extend in the vertical direction. A plurality of sintering shelves 14 are provided in the second chamber 4, and these sintering shelves can be arranged according to the conventional arrangement. A first circulation fan 15, a second circulation fan 16, and a dehumidification fan 17 are provided at the top of the box body 1, and the impellers of the first circulation fan 15 and the second circulation fan 16 are provided in the corresponding diversion tubes 10, and the dehumidification fan 17 is located in the exhaust duct 12. Specifically, the exhaust duct 12 is provided in the middle of the top of the second chamber 4, and the two diversion tubes 10 are symmetrically distributed along the exhaust duct 12.

[0019] The working principle of the present invention is as follows: The FEP molding resin is placed on the sintering shelf through a tray. The heating tube is turned on, and the impeller of the circulating fan extracts the air at the top of the second chamber, and through several rows of air vents on the side wall of the shunt cylinder, enters the first chamber and the third chamber respectively at both ends of the shunt channel. It is heated and raised in temperature by the heating tubes in the first chamber and the third chamber. The heated air after temperature rise enters the second chamber through the air inlet sieve plates on both sides of the second chamber, sintering the FEP molding resin on the sintering shelf and ensuring the sintering quality. The hot air after heat exchange in the second chamber enters the shunt channel through the shunt cylinder, forming a forced convection cycle. In the heating and drying stage, according to the requirements of the drying process, the humid air can be discharged externally through the dehumidifying fan. After the pressure difference between the inside and outside of the box reaches the specified value, the one-way valve replenishes fresh air into the box. When the pressure difference becomes smaller, the one-way valve automatically closes.

Claims

1. A high temperature sintering furnace, comprising a box (1), characterized in that: Two air inlet sieve plates (2) are arranged in the box body (1) at intervals along the length direction. The two air inlet sieve plates (2) extend in the vertical direction and are spaced apart from the top surface of the box body, so as to divide the internal space of the box body into a first chamber (3), a second chamber (4), and a third chamber (5). The first chamber (3) and the third chamber (5) form a vertical air duct. A horizontal baffle (6) is arranged between the top edges of the two air inlet sieve plates (2), so that there is a space between the top surface of the box body and the horizontal baffle, and the space is divided into a first horizontal air duct (7) and a second horizontal air duct (8) by a partition. The first horizontal air duct (7) and the second horizontal air duct (8) are both provided with a flow dividing device (9) to separate the corresponding horizontal air ducts. The flow dividing device (9) comprises a flow dividing cylinder (10) and a flow dividing channel (11). The flow dividing cylinder (10) is arranged in the flow dividing channel (11). The upstream end of the flow dividing cylinder (10) is connected to the second chamber (4), and the downstream end is sealed. The side wall of the flow dividing cylinder (10) is provided with a plurality of air outlets. The two ends of the flow dividing channel (11) are respectively connected to the two ends of the horizontal air duct. An exhaust pipe (12) is disposed on the top of the second chamber (4), the upstream end of the exhaust pipe (12) is connected to the second chamber (4), and the downstream end of the exhaust pipe (12) extends out of the box body (1). The first chamber (3) and the third chamber (5) are both provided with a plurality of heating tubes (13), and the second chamber (4) is provided with a plurality of sintering shelves (14). A first circulation fan (15), a second circulation fan (16), and a dehumidification fan (17) are arranged on the top of the box body (1); the impellers of the first circulation fan (15) and the second circulation fan (16) are arranged in the corresponding diversion cylinders (10); and the dehumidification fan (17) is located in the exhaust cylinder (12).

2. The high temperature sintering furnace according to claim 1, characterized in that: The flow distribution channel (11) comprises a first baffle (11a) and a second baffle (11b); one end of the first baffle (11a) is connected to one side wall of the corresponding horizontal air duct, and one end of the second baffle (11b) is connected to the other side wall of the corresponding horizontal air duct; the extended ends of the first baffle (11a) and the second baffle (11b) are located on both sides of the flow distribution cylinder (10) and are tangent to the side walls of the flow distribution cylinder (10).

3. The high temperature sintering furnace according to claim 2, characterized in that: The first baffle (11a) and the second baffle (11b) are both distributed perpendicularly to the length direction of the horizontal air duct.

4. The high temperature sintering furnace according to claim 1, characterized in that: An air supply pipe (18) is provided in the area of ​​the box side wall corresponding to the second chamber (4), and its opening and closing is controlled by a one-way valve (19).

5. The high temperature sintering furnace according to claim 1, characterized in that: The heating tube (13) is U-shaped and extends in a vertical direction.

6. The high temperature sintering furnace according to claim 1, characterized in that: The exhaust cylinder (12) is arranged in the middle of the top of the second chamber (4), and the two diversion cylinders (10) are symmetrically distributed along the exhaust cylinder (12).

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