Preheating mechanism with circulating heat conduction structure

Abstract

The utility model discloses a preheating mechanism with a circulating heat conduction structure, which comprises a shell with an inverted U-shaped structure, one end of the shell is used for being fixedly connected with a starting end of an annular kiln, a cyclone separator and a buffer tank are arranged at the top of the shell, and a plurality of preheating air pipes are arranged in an inner cavity of the shell. A gas collecting pipe is arranged at a feeding port of the cyclone separator and used for being connected with an exhaust port of the annular kiln, and the exhaust port of the cyclone separator supplies gas to the buffer tank through a gas guide pipe. The preheating air pipes are connected with the buffer tank in parallel. The preheating mechanism with the circulating heat conduction structure recovers hot air exhausted by the annular cellar for preheating, and energy conservation and emission reduction are achieved; and hot air is subjected to two-stage drying, and the preheating effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum-aluminum brick processing, in particular to a preheating mechanism with a circulating heat-conducting structure. Background Art

[0002] Bauxite clinker, referred to as high-alumina material, and various high-alumina bricks made of its clinker are refractory or anti-corrosion materials widely used in the metallurgical industry and other industries, especially in the top of electric furnaces, blast furnaces and hot blast furnaces. The refractory effect is very significant, and the performance is better than ordinary clay refractory bricks. The raw materials are calcined in a vertical kiln. The raw materials and the airflow are counter-current. The raw materials move from top to bottom, and the airflow moves from bottom to top. This is very beneficial to the heat exchange between the media, and is also beneficial to improving production conditions, ensuring product quality, and saving energy consumption. Bauxite clinker needs to be calcined to become clinker before high-alumina bricks can be made.

[0003] Existing fired bricks, tiles, stoneware and clay refractory materials are generally preheated, fired and cooled in a ring kiln. During the preheating stage, bauxite will be heated to a certain temperature to remove moisture and volatiles. In the existing ring kiln, the tail gas is directly discharged into the atmosphere, wasting energy, and the preheating mechanism generally needs to re-introduce hot air to preheat and dehydrate the stacking, which reduces the energy utilization rate, and the low pressure of the hot air makes the preheating effect unsatisfactory. Utility Model Content

[0004] The utility model aims to provide a preheating mechanism with a circulating heat-conducting structure to solve the problem in the above-mentioned background technology that the existing tail gas is directly discharged into the atmosphere and the preheating mechanism needs to re-introduce hot air to preheat and dehydrate the stack.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a preheating mechanism with a circulating heat-conducting structure, comprising a shell in an inverted U-shaped structure, one end of the shell being used to be fixedly connected to the starting end of the annular kiln, a cyclone separator and a buffer tank being arranged on the top of the shell, and a plurality of preheating air ducts being arranged in the inner cavity of the shell. The feed port of the cyclone separator is provided with an air collecting pipe for connecting with the exhaust port of the annular kiln, and the exhaust port of the cyclone separator supplies air to the buffer tank through an air guide pipe. A plurality of the preheating air ducts are connected in parallel with the buffer tank.

[0006] By adopting the above technical scheme, the shell design of the inverted U-shaped structure is conducive to preheating the pallet; the cyclone separator is used to dry the collected hot air and reuse it, which effectively saves energy; the preheating air duct uses the dried hot air directly to preheat the pallet, and the preheating effect is good.

[0007] Preferably, there are two buffer tanks, which are distributed on both sides of the shell.

[0008] By adopting the above technical solution, buffer tanks are respectively provided on both sides of the shell, so that the flow rate of hot air discharged to the preheating air duct is stable and continuous, ensuring a uniform and stable preheating effect.

[0009] Preferably, the plurality of preheating air ducts are divided into two groups and distributed on both sides of the inner cavity of the shell, and the preheating air ducts in the same group are evenly spaced from one end to the other end of the shell, and the preheating air ducts in the same group are connected in parallel with the corresponding buffer tank.

[0010] By adopting the above technical solution, when preheating the pallet, both sides of the pallet can be heated and preheated at the same time, the pallet is heated evenly, and the preheating efficiency is high.

[0011] Preferably, each preheating air duct extends vertically downward, and the downstream end is sealed, and a plurality of preheating air outlets are arranged on the side wall of each preheating air duct at intervals along the height direction, and face away from the side wall of the shell.

[0012] By adopting the above technical solution, when the pallets are stacked inside the preheating mechanism, the air outlets on both sides of the pallets are evenly arranged, so that the pallets can be heated evenly in all directions.

[0013] Preferably, the preheating air duct gradually decreases in diameter from the upper end to the lower end.

[0014] By adopting the above technical solution, the hot air is pressurized through a design that is wide at the top and narrow at the bottom, and the air volume of each preheating air outlet remains consistent.

[0015] Preferably, the buffer tank is filled with a hygroscopic material, and the hygroscopic material is quicklime.

[0016] By adopting the above technical solution, the hygroscopic material in the buffer tank dehumidifies the air sent to the preheating mechanism again, thereby improving the preheating efficiency.

[0017] Compared with the prior art, the utility model has the following beneficial effects: the preheating mechanism with a circulating heat-conducting structure:

[0018] 1. Recover the hot air discharged from the annular kiln and use it to preheat the pallet. By recycling the hot air from the annular kiln for heat conduction, energy saving and emission reduction can be achieved.

[0019] 2. A cyclone separator is provided to separate the moisture in the high-temperature gas, and then the dry high-temperature gas is guided from the air duct to the preheating structure, thereby improving the energy utilization rate.

[0020] 3. Several preheating air outlets are evenly arranged inside the preheating mechanism to preheat the pallets evenly; the preheating air duct gradually decreases in diameter from the upper end to the lower end to keep the air volume of each preheating air outlet consistent; the buffer tank dehumidifies the hot air twice to improve the preheating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a schematic diagram of the overall front view structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall top-sectional structure of the utility model;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the connection between the buffer tank and the air guide pipe of the utility model.

[0024] In the figure: 1. Shell; 2. Cyclone separator; 3. Air collecting pipe; 4. Buffer tank; 5. Air guide pipe; 6. Preheating air duct. DETAILED DESCRIPTION

[0025] 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 in 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.

[0026] See also Figure 1-3 The utility model provides a technical solution: a preheating mechanism with a circulating heat-conducting structure, comprising a shell 1 in an inverted U-shaped structure, one end of which is used to be fixedly connected to the starting end of the ring kiln, characterized in that: a cyclone separator 2 and a buffer tank 4 are arranged on the top of the shell 1, and a plurality of preheating air ducts 6 are arranged in the inner cavity of the shell 1. The feed port of the cyclone separator 2 is provided with an air collecting pipe 3 for connecting with the exhaust port of the ring kiln, the exhaust port of the cyclone separator 2 supplies air to the buffer tank 4 through an air guide pipe 5, and a plurality of the preheating air ducts 6 are connected in parallel with the buffer tank 4.

[0027] Before entering the annular kiln, the pallets need to be preheated and placed in the shell 1 of the preheating mechanism for preheating. The hot air discharged from the annular kiln processing and production is introduced into the cyclone separator 2 through the gas collecting pipe 3. The cyclone separator 2 dehydrates the hot air and the discharged gas enters the buffer tank 4 through the air guide pipe 5. The buffer tank 4 is connected to the preheating air duct 6. The buffer tank 4 makes the hot air flow rate discharged to the preheating air duct 6 stable and continuous, and ensures that the preheating effect is uniform and stable. The hot air is dried and dehumidified again in the buffer tank 4.

[0028] There are two buffer tanks 4, which are distributed on both sides of the shell 1. The pallets in the shell 1 can be heated on both sides, which effectively reduces the preheating time.

[0029] If the preheating air ducts 6 are divided into two groups and distributed on both sides of the inner cavity of the shell 1, the preheating air ducts 6 in the same group are evenly spaced from one end to the other end of the shell 1, and the preheating air ducts 6 in the same group are connected in parallel with the corresponding buffer tank 4. Each preheating air duct 6 extends vertically downward, and the downstream end is sealed. A plurality of preheating air ports are arranged at intervals along the height direction on the side wall of each preheating air duct 6, and the side wall faces away from the shell 1.

[0030] The hot air after drying is discharged evenly from the two side walls of the housing 1 toward the palletizing.

[0031] The preheating air duct 6 gradually decreases in diameter from the upper end to the lower end, so that the air volume of each preheating air outlet remains consistent, ensuring that the gaps in the pallet can be heated evenly.

[0032] The buffer tank 4 is filled with a hygroscopic material, which is quicklime. The hot air discharged from the annular kiln is dehumidified by the cyclone separator 2 and the buffer tank 4, ensuring that the hot air discharged to the palletizing is completely dry gas.

[0033] Working principle: When using the preheating mechanism with a circulating heat-conducting structure, the hot air generated during the processing of the annular kiln is collected through the gas collecting pipe 3, and then the recovered hot air is introduced into the cyclone separator 2. The moisture in the hot air is separated by the cyclone separator 2, and the moisture is discharged through the drain pipe 12. The separated high-temperature gas enters the air guide pipe 5 again, and the air guide pipe 5 introduces the gas into the buffer tank 4, and then enters the preheating air duct 6, and finally is discharged through the preheating seal to preheat the pallet.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A preheating mechanism with a circulating heat-conducting structure, comprising a shell (1) in an inverted U-shaped structure, one end of the shell (1) being used for fixed connection with the starting end of an annular kiln, characterized in that: A cyclone separator (2) and a buffer tank (4) are arranged on the top of the shell (1), and a plurality of preheating air ducts (6) are arranged in the inner cavity of the shell (1). The feed port of the cyclone separator (2) is provided with an air collecting pipe (3) for connecting with the exhaust port of the annular kiln. The exhaust port of the cyclone separator (2) supplies air to the buffer tank (4) through the air guide pipe (5). A plurality of the preheating air ducts (6) are connected in parallel with the buffer tank (4).

2. The preheating mechanism according to claim 1, characterized in that: There are two buffer tanks (4), which are distributed on both sides of the shell (1).

3. The preheating mechanism according to claim 2, characterized in that: If the preheating air ducts (6) are divided into two groups and distributed on both sides of the inner cavity of the shell (1), the preheating air ducts (6) in the same group are evenly spaced from one end to the other end of the shell (1), and the preheating air ducts (6) in the same group are connected in parallel with the corresponding buffer tank (4).

4. The preheating mechanism according to claim 1 or 3, characterized in that: Each preheating air duct (6) extends vertically downward and has a sealed downstream end. A plurality of preheating air outlets are arranged at intervals along the height direction on the side wall of each preheating air duct (6) and face away from the side wall of the shell (1).

5. The preheating mechanism according to claim 4, characterized in that: The preheating air duct (6) gradually decreases in diameter from the upper end to the lower end.

6. The preheating mechanism according to claim 1, characterized in that: The buffer tank (4) is filled with a hygroscopic material, which is quicklime.

Images