Energy-saving kiln device with high efficiency waste heat recovery

Abstract

The utility model discloses an efficient waste heat recovery energy -conserving kiln device, include: kiln, the inner wall of kiln is hung with a plurality of electric heating wire, air outlet, air outlet fixedly connected in the top of kiln, the position of air outlet corresponding of kiln is provided with a plurality of through -hole with kiln inside intercommunication, the one side of air outlet is transversely moved and is provided with sealed plug -in board, heat exchange pipe, heat exchange pipe is horn -like structure and is placed in one end of air outlet, the inside fixedly connected of heat exchange pipe has spiral water pipe, is used for heat exchange and dehumidification, the utility model has the beneficial effects that: the top and bottom of heat exchange pipe inner wall staggered fixedly connect upper shelf and lower shelf, divide the heat exchange pipe interior into S -shaped channel, prolong the flow path of hot gas in heat exchange pipe, further increase heat exchange time, improve the waste heat recovery efficiency, hot gas and spiral water pipe contact liquefaction into water drop and fall in heat exchange pipe, along heat exchange pipe and pass through drain hole and enter the collection position to the one end, realize the dehumidification to hot gas.

Description

Technical Field

[0001] This utility model relates to the field of kiln technology, specifically to a high-efficiency waste heat recovery energy-saving kiln device. Background Technology

[0002] A ceramic firing kiln is a specialized piece of equipment used for high-temperature firing of ceramics. Its function is to transform ceramic blanks into robust and durable finished products by controlling factors such as temperature, humidity, and atmosphere. Electric kilns are widely used, employing electrical energy for heating and providing a stable firing environment. However, electric kilns generate a large amount of hot exhaust gas during the heating process, especially during the high-temperature heating stages. This exhaust gas is discharged through exhaust pipes or chimneys on the kiln body. Without a waste heat recovery system, this high-temperature exhaust gas is directly released into the atmosphere, resulting in significant heat loss. This not only leads to energy waste but also impacts the environment, particularly in terms of pollutant emissions and greenhouse gas emissions. Utility Model Content

[0003] The purpose of this invention is to provide a high-efficiency waste heat recovery and energy-saving kiln device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency waste heat recovery energy-saving kiln device, comprising:

[0005] The kiln has multiple heating wires suspended on its inner wall;

[0006] An air outlet is fixed to the top of the kiln. The position of the air outlet corresponding to the kiln is provided with multiple through holes that communicate with the inside of the kiln. A sealing plate is horizontally installed on one side of the air outlet.

[0007] The heat exchange tube has a trumpet-shaped structure and is located at one end of the air outlet. A spiral water pipe is fixed inside the heat exchange tube for heat exchange and dehumidification. Multiple upper shelves are fixed to the top of the inner wall of the heat exchange tube, and multiple lower shelves are fixed to the bottom of the inner wall of the heat exchange tube in an alternating manner with the upper shelves. Drainage holes are fixed to the bottom of the lower shelves.

[0008] An insulated water tank is placed on top of the kiln and connected to one end of a spiral water pipe.

[0009] Preferably, a furnace door is rotatably installed at one end of the kiln.

[0010] Preferably, the bottom of the kiln is fixedly connected to a track, and the track is slidably connected to a movable kiln bottom that cooperates with the kiln.

[0011] Preferably, the inner wall of the kiln is fixed with a plurality of ceramic hooks, and the heating wire is suspended on the outside of the ceramic hooks.

[0012] Preferably, an electric push rod is fixedly connected to the top of the kiln, and the output end of the electric push rod is fixedly connected to a sealing plate.

[0013] Preferably, a heat insulation box is fixedly connected to the top of the kiln, the heat exchange tube is fixedly connected inside the heat insulation box, a water collection pool is fixedly connected to the outside of the kiln, a water collection pipe is fixedly connected to the lower end of the heat exchange tube, and one end of the water collection pipe is inserted into the water collection pool and located below the water surface inside the water collection pool.

[0014] Preferably, a fan is fixedly connected to the top of the insulated water tank, the input end of the fan is connected to the top of the heat exchange tube, a filter box is fixedly connected to the input end of the fan, and a Y-shaped air duct is fixedly connected to the output end of the fan, with one end of the Y-shaped air duct communicating with the inside of the kiln.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: the heat exchange tube is designed with a trumpet-shaped structure, and a copper spiral water pipe is installed inside; copper has excellent thermal conductivity and can quickly achieve heat exchange; the trumpet-shaped structure combined with the spiral water pipe increases the contact area and contact time between hot air and cold water, making heat exchange more complete and efficient, and effectively recovering the heat in the hot air discharged from the kiln; the top and bottom of the inner wall of the heat exchange tube are alternately fixed with upper and lower partition plates, dividing the inside of the heat exchange tube into S-shaped channels; the flow path of hot air in the heat exchange tube is extended, further increasing the heat exchange time and improving the waste heat recovery efficiency; the hot air liquefies into water droplets upon contact with the spiral water pipe and falls into the heat exchange tube, flowing along the heat exchange tube to one end and entering the collection position through the drain hole, thus achieving dehumidification of the hot air; at the same time, one end of the water collection pipe is inserted into the water collection pool and located below the water surface, using the water seal principle to prevent hot air leakage and ensure the dehumidification and heat recovery effect; the collected hot water is transported to the insulated water tank. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the water collection tank of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the fan of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the heat exchange tube of this utility model;

[0020] Figure 5 This is a schematic diagram of the lower shelf of this utility model.

[0021] In the diagram: 1. Kiln; 2. Kiln door; 3. Water collection tank; 4. Heating wire; 5. Ceramic hook; 6. Track; 7. Movable kiln bottom; 8. Filter box; 9. Air outlet pipe; 10. Electric push rod; 11. Sealing plate; 12. Insulation box; 13. Heat exchange tube; 14. Upper shelf; 15. Lower shelf; 16. Drain hole; 17. Water collection pipe; 18. Fan; 19. Insulated water tank; 20. Spiral water pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1 , 2 As shown in Figures 3, 4, and 5, this utility model provides a technical solution: a high-efficiency waste heat recovery energy-saving kiln device, comprising: a kiln 1 with fireproof bricks installed inside, and multiple heating wires 4 suspended on the inner wall of the kiln 1; an air outlet pipe 9 fixedly connected to the top of the kiln 1, with multiple through holes communicating with the interior of the kiln 1 at the position corresponding to the air outlet pipe 9, a sealing plate 11 slidably connected to one side of the air outlet 9, a heat exchange tube 13 having a trumpet-shaped structure with one end of its bottom connected to one end of the air outlet pipe 9, and a copper spiral water pipe fixedly connected inside the heat exchange tube 13. 20, used for heat exchange and dehumidification, has multiple upper shelves 14 fixed to the top of the inner wall of the heat exchange tube 13, and multiple lower shelves 15 fixed to the bottom of the inner wall of the heat exchange tube 13 in an alternating manner with the upper shelves 14. The upper shelves 14 and lower shelves 15 are used to divide the interior of the heat exchange tube 13 into S-shaped channels. The bottom of the lower shelves 15 is fixed with a drain hole 16. The insulated water tank 19 is fixed to the top of the kiln 1 and connected to one end of the spiral water pipe 20. The insulated water tank 19 is made of stainless steel water tank with an outer insulation layer, which is polyurethane foam and glass wool.

[0024] It should be noted that in this embodiment, a controller and a corresponding power distribution cabinet are provided. A temperature sensor is installed inside the kiln 1. During operation, the heating wire 4 heats the inside of the kiln 1. When the temperature reaches the preset value, the controller controls the air outlet 9 to open. The heat enters the heat exchange tube 13 through the air outlet 9 under the action of negative pressure. One end of the spiral water pipe 20 is connected to the water pump. The cold water inlet is close to the air outlet 9. The heat flows along an S-shaped path separated by the upper shelf 14 and the lower shelf 15. The cold water flows inside the spiral water pipe 20 to achieve heat exchange. The hot air liquefies into water droplets when it comes into contact with the spiral water pipe 20 and falls into the heat exchange tube 13. The water droplets condense into water and flow along the heat exchange tube 13 to one end. It enters the collection position through the drain hole 16 to dehumidify the hot air. The air after dehumidification and heat exchange is filtered and can be re-entered into the kiln 1 for recycling. The hot water is transported to the insulated water tank 19 for collection and can be used for heating, production water heating, etc.

[0025] In one embodiment, a furnace door 2 is rotatably installed at one end of the kiln 1, a track 6 is fixedly connected to the bottom of the kiln 1, and a movable furnace bottom 7 that cooperates with the kiln 1 is slidably connected to the track 6.

[0026] It should be noted that, in this embodiment, when placing the ceramics, the movable furnace bottom 7 is pulled out along the track 6 by traction. The bottom of the movable furnace bottom 7 is equipped with rollers that cooperate with the track 6, so that the movable furnace bottom 7 can be pulled out. The ceramics are placed on top of the movable furnace bottom 7, and after the movable furnace bottom 7 is pushed back into the kiln 1, the kiln door 2 is rotated and closed, thereby forming a closed kiln space inside the kiln 1.

[0027] In one embodiment, a plurality of ceramic hooks 5 are fixed to the inner wall of the kiln 1, and the heating wire 4 is suspended on the outside of the ceramic hooks 5.

[0028] It should be noted that in this embodiment, the ceramic hook 5 is made of precision ceramic, so that the ceramic hook 5 is hung on the inner wall of the kiln 1. The heating wire is in more direct contact with the airflow in the kiln, which can transfer heat to the air more efficiently. It is also easier for operators to inspect, repair and replace, avoiding the maintenance difficulties caused by the difficult position of the embedded heating wire.

[0029] In one embodiment, an electric push rod 10 is fixedly connected to the top of the kiln 1, and the output end of the electric push rod 10 is fixedly connected to the sealing plate 11.

[0030] It should be noted that in this embodiment, the top of the kiln 1 is provided with an air inlet, and a baffle plate is fixed to one side of the sealing plate 11. When the sealing plate 11 blocks the air outlet pipe 9, the baffle plate blocks the air inlet. When the electric push rod 10 pulls the sealing plate 11 out of the internal air outlet pipe 9, the baffle plate is misaligned with the air inlet, thereby facilitating air circulation.

[0031] In one embodiment, a heat insulation box 12 is fixedly connected to the top of the kiln 1. The heat insulation box 12 is a metal box filled with glass wool. The heat exchange tube 13 is fixedly connected to the inside of the heat insulation box 12. A water collection pool 3 is fixedly connected to the outside of the kiln 1. A water collection pipe 17 is fixedly connected to the lower end of the heat exchange tube 13, and one end of the water collection pipe 17 is inserted into the inside of the water collection pool 3 and is located below the water surface inside the water collection pool 3.

[0032] It should be noted that in this embodiment, when the hot air comes into contact with the low-temperature spiral water pipe 20, the water in the hot air liquefies into water on the outside of the spiral water pipe 20 under the action of liquefaction. Under gravity, the water drips into the bottom of the inner wall of the heat exchange tube 13. Because the heat exchange tube 13 is funnel-shaped, the bottom of its inner wall is inclined downward to one end. The water flows along the inner wall of the heat exchange tube 13 and into the water collection pipe 17. It enters the water collection pool 3 along the heat exchange tube 13. Since the water level inside the water collection pool 3 is higher than the outlet of the water collection pipe 17, the water collection pipe 17 is blocked.

[0033] In one embodiment, a fan 18 is fixedly connected to the top of the insulated water tank 19, the input end of the fan 18 is connected to the top of the heat exchange tube 13, a filter box 8 is fixedly connected to the input end of the fan 18, and a Y-shaped air duct is fixedly connected to the output end of the fan 18, with one end of the Y-shaped air duct communicating with the inside of the kiln 1.

[0034] It should be noted that, in this embodiment, during operation, the fan 18 draws the heat exchange tube 13 into a negative pressure. Under the action of negative pressure, the hot air in the kiln 1 enters the heat exchange tube 13 through the air outlet 9. After heat exchange and dehumidification, it enters the filter box 8. A filter screen is inserted inside the filter box 8 to filter the air. When the filtered air needs to be recycled, the solenoid valve of the pipe connected to the kiln 1 is opened, and the dry and warm air enters the kiln 1 for convenient and rapid heating. When it is not needed, the air can be discharged.

[0035] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency waste heat recovery energy-saving kiln device, characterized in that: include: Kiln (1), with multiple electric heating wires (4) suspended on the inner wall of the kiln (1); Air outlet (9) is fixed to the top of the kiln (1). The kiln (1) has multiple through holes that communicate with the inside of the kiln (1) at the position of the air outlet (9). A sealing plate (11) is provided on one side of the air outlet (9). The heat exchange tube (13) has a trumpet-shaped structure and is located at one end of the air outlet (9). A spiral water pipe (20) is fixed inside the heat exchange tube (13) for heat exchange and dehumidification. Multiple upper shelves (14) are fixed to the top of the inner wall of the heat exchange tube (13). Multiple lower shelves (15) are fixed to the bottom of the inner wall of the heat exchange tube (13) in an alternating manner with the upper shelves (14). A drain hole (16) is fixed to the bottom of the lower shelves (15). A heat-insulating water tank (19) is placed on top of the kiln (1) and connected to one end of a spiral water pipe (20).

2. The high-efficiency waste heat recovery energy-saving kiln device according to claim 1, characterized in that: A furnace door (2) is rotatably installed at one end of the kiln (1).

3. The high-efficiency waste heat recovery energy-saving kiln device according to claim 1, characterized in that: The bottom of the kiln (1) is fixedly connected to a track (6), and the track (6) is slidably connected to a movable furnace bottom (7) that cooperates with the kiln (1).

4. The high-efficiency waste heat recovery energy-saving kiln device according to claim 1, characterized in that: The inner wall of the kiln (1) is fixed with a plurality of ceramic hooks (5), and the heating wire (4) is suspended on the outside of the ceramic hooks (5).

5. The high-efficiency waste heat recovery energy-saving kiln device according to claim 1, characterized in that: An electric push rod (10) is fixedly connected to the top of the kiln (1), and the output end of the electric push rod (10) is fixedly connected to the sealing plate (11).

6. The high-efficiency waste heat recovery energy-saving kiln device according to claim 1, characterized in that: A heat insulation box (12) is fixedly connected to the top of the kiln (1), and the heat exchange tube (13) is fixedly connected inside the heat insulation box (12). A water collection pool (3) is fixedly connected to the outside of the kiln (1). A water collection pipe (17) is fixedly connected to the lower end of the heat exchange tube (13), and one end of the water collection pipe (17) is inserted into the water collection pool (3) and located below the water surface inside the water collection pool (3).

7. The high-efficiency waste heat recovery energy-saving kiln device according to claim 1, characterized in that: A fan (18) is fixedly connected to the top of the insulated water tank (19). The input end of the fan (18) is connected to the top of the heat exchange tube (13). A filter box (8) is fixedly connected to the input end of the fan (18). A Y-shaped air duct is fixedly connected to the output end of the fan (18), and one end of the Y-shaped air duct is connected to the inside of the kiln (1).

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