Waste heat collecting structure for high-temperature zone of tunnel kiln

Abstract

The invention discloses a tunnel kiln high-temperature zone waste heat collecting structure which comprises a kiln body and a heat storage mechanism. The floating type heat storage base and the floating type heat storage cover plate are arranged on the upper portion of the interior of the high-temperature zone, the floating type heat storage cover plate is installed on the floating type heat storage base in a covering mode, the multiple heat storage grooves are sealed, and therefore heat can be stored through the multiple heat storage grooves, and air flow circulation conveying is conducted by arranging the lifting guide pipes at the two ends of the heat storage grooves; and meanwhile, airflow is not directly sucked from the upper part of the kiln body, so that the influence on the temperature of the high-temperature zone is greatly reduced, and the characteristics of heat recovery, energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] The invention belongs to the field of tunnel kiln waste heat recovery technology, and in particular relates to a tunnel kiln high temperature zone waste heat collection structure. Background Art

[0002] The tunnel kiln is a key thermal equipment for the continuous production of refractory bricks. It consists of a long straight tunnel with fixed kiln walls and arches on both sides and the top. The kiln car loaded with fired products runs on the straight track laid at the bottom. The tunnel is divided into a waste heat zone, a high temperature zone, and a cooling zone from front to back. After the blanks enter the kiln body for preheating, they enter the high temperature zone for high temperature firing, and finally enter the cooling zone for natural cooling and discharge. The high temperature zone is the key area for the firing of the blanks. The high temperature inside makes the top of the high temperature zone have a large amount of high heat. If this part of the high heat is directly volatilized into the atmosphere, it will cause heat energy waste and affect the surrounding environment. By recovering this part of high heat, the wet blanks in the drying room can be dried to achieve the purpose of energy saving and environmental protection. Generally, the heat from the upper layer of the high-temperature zone is extracted through an induced draft fan, but this method causes the firing temperature inside the high-temperature zone to drop significantly, affecting the firing of the product. In this case, it is necessary to increase the air supply from the nozzle to meet the temperature requirements, or to increase the combustion-supporting nozzle, which greatly increases the additional energy consumption. Therefore, it is necessary to develop a new high-temperature zone waste heat recovery structure that can not only recover the heat from the high-temperature zone, but also minimize the impact on the firing temperature in the high-temperature zone, and at the same time be able to flexibly adjust the position of waste heat collection to improve the flexibility of the structure. Summary of the invention

[0003] In view of the shortcomings of the above-mentioned prior art, the problem solved by the present invention is: to provide a device that can not only recover the heat of the high-temperature zone, but also minimize the impact on the firing temperature in the high-temperature zone, and at the same time be able to flexibly adjust the position of waste heat collection, and use a flexible tunnel kiln high-temperature zone waste heat collection structure.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows: A waste heat collection structure in a high temperature zone of a tunnel kiln comprises a kiln body and a heat storage mechanism; a preheating zone, a high temperature zone and a cooling zone are arranged inside the kiln body from front to back; a heat storage mechanism is installed in the high temperature zone; the heat storage mechanism comprises a floating heat storage base, a floating heat storage cover plate, a power unit, a sliding block, a lifting guide tube and an external positioning guide tube; a plurality of heat storage tanks are evenly arranged on the upper side of the floating heat storage base, and the two ends of the heat storage tanks pass through the front and rear ends of the floating heat storage base; the floating heat storage cover plate is installed to cover the top of the floating heat storage base and close the plurality of heat storage tanks; A plurality of sliding blocks are evenly installed on both sides of the floating heat storage base; the sliding blocks are slidably installed on both sides of the kiln body; a plurality of power units are respectively installed on the upper ends of both sides of the kiln body; the power units drive the sliding blocks to move up and down, and drive the floating heat storage base and the floating heat storage cover plate to move up and down; the front and rear ends of the heat storage tank are respectively connected to the lifting guide tube; the upper end of the lifting guide tube slides up and down and is connected to the upper end outside of the kiln body; a plurality of external positioning guide tubes are fixedly installed on the front and rear outsides of the upper end of the kiln body; the lifting guide tube is slidably plugged into the lower end of the external positioning guide tube.

[0005] Furthermore, the power unit is a driving motor; a plurality of vertical guide rails are provided on both sides of the kiln body; the sliding block is slidably engaged in the vertical guide rails; built-in threaded columns are rotatably installed in the vertical guide rails, and the built-in threaded columns are threadedly engaged with the sliding blocks; the upper ends of the built-in threaded columns are connected to the power unit, and the power unit drives the built-in threaded columns to rotate forward and reverse.

[0006] Furthermore, a plurality of positioning protrusions are respectively provided on both sides of the floating heat storage cover plate, and the positioning protrusions are respectively inserted into the vertical tracks correspondingly; a positioning groove is provided on the lower side of the positioning protrusion; a limiting column is provided inside the lower side of the vertical track; a through hole is provided on the sliding block; the limiting column, the through hole and the positioning groove are correspondingly distributed in the upper and lower positions; the floating heat storage base and the floating heat storage cover plate move downward synchronously, and the through hole of the sliding block passes through the limiting column, and when the positioning groove of the positioning protrusion abuts downward against the upper end of the limiting column, the floating heat storage cover plate is limited by the limiting column and stops moving downward, and the floating heat storage base continues to move downward and separates from the floating heat storage cover plate.

[0007] Furthermore, the lower end of the built-in threaded column is rotatably clamped to the lower end of the vertical guide rail by rotating the clamping block.

[0008] Furthermore, the lower sides of both ends of the floating heat storage cover plate are provided with docking plug-in protrusions; the upper sides of both ends of the floating heat storage base are provided with docking grooves; the upper and lower positions of the docking plug-in protrusions and the docking grooves correspond and match each other.

[0009] Furthermore, the upper end cross-section of the kiln body is an upwardly convex arch structure.

[0010] Furthermore, the heat storage mechanism is made of high temperature resistant material.

[0011] Furthermore, the kiln body is made of refractory heat-insulating material.

[0012] The beneficial effects of the present invention are as follows: 1. The present invention arranges a floating heat storage base and a floating heat storage cover plate above the interior of the high temperature zone, covers and installs the floating heat storage cover plate above the floating heat storage base, and seals a plurality of heat storage tanks, so that heat can be stored through the plurality of heat storage tanks, and air circulation and transportation are carried out by arranging lifting ducts at both ends of the heat storage tanks, so that the heat of the kiln body in the high temperature zone is utilized, and at the same time, the air flow is not directly sucked from above the kiln body, which greatly reduces the impact on the temperature of the high temperature zone, and achieves the characteristics of heat recovery, energy saving and environmental protection.

[0013] 2. The present invention can drive the built-in threaded column to rotate through the power unit, and the built-in threaded column drives the sliding block to move up and down, thereby driving the floating heat storage base and the floating heat storage cover plate to move up and down synchronously, so that the collection position of the waste heat can be adjusted according to the different firing temperatures of the blanks. When the firing temperature is low, the floating heat storage base and the floating heat storage cover plate can be driven to move downward to increase the collection temperature. At the same time, the collection position can be reasonably adjusted according to the different blank heights.

[0014] 3. After the blank is fired, the heat inside the high-temperature zone decreases, and the temperature inside the heat storage tank will drop sharply. For this reason, the floating heat storage base and the floating heat storage cover plate can be moved downward synchronously by the present invention, so that the through hole of the sliding block is connected to the limiting column. When the positioning groove of the positioning card protrusion abuts against the upper end of the limiting column downward, the floating heat storage cover plate stops moving downward due to the limitation of the limiting column, and the floating heat storage base will continue to move downward and separate from the floating heat storage cover plate. In this way, the heat storage tank is opened. At this time, the heat inside the high-temperature zone is directly utilized when the airflow is circulated and transported through the lifting ducts at both ends of the heat storage tank. In this way, the speed of the temperature drop of the circulating airflow can be slowed down, and the heat of the high-temperature zone can be fully absorbed, so as to achieve the characteristics of fully recovering waste heat and reducing additional energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the floating heat storage base and the floating heat storage cover plate of the present invention located above the high temperature zone.

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the floating heat storage base and the floating heat storage cover plate of the present invention after they move downward.

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the floating heat storage base and the floating heat storage cover plate after being separated from each other.

[0018] Figure 4 It is a schematic diagram of an enlarged cross-sectional structure of the floating heat storage base and the floating heat storage cover plate after abutment of the present invention.

[0019] Figure 5 For the present invention Figure 3 Schematic diagram of the partially enlarged cross-sectional structure.

[0020] Figure 6 For the present invention Figure 5 A schematic diagram of a partially enlarged cross-sectional structure on one side.

[0021] Figure 7 It is a side structural schematic diagram of the lifting conduit, the external positioning conduit, the floating heat storage base and the floating heat storage cover plate of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] like Figures 1 to 7 As shown, a waste heat collection structure of a high temperature zone of a tunnel kiln comprises a kiln body 1 and a heat storage mechanism 2; the interior of the kiln body 1 is respectively provided with a preheating zone, a high temperature zone 11, and a cooling zone from front to back; the heat storage mechanism 2 is installed in the high temperature zone 11; the heat storage mechanism 2 comprises a floating heat storage base 21, a floating heat storage cover plate 22, a power unit 23, a sliding block 24, a lifting guide tube 25, and an external positioning guide tube 26; a plurality of heat storage tanks 211 are evenly arranged on the upper side of the floating heat storage base 21, and the two ends of the heat storage tanks 211 pass through the front and rear ends of the floating heat storage base 21; the floating heat storage cover plate 22 is installed on the upper side of the floating heat storage base 21 to cover the plurality of heat storage tanks 211 Closed; a plurality of sliding blocks 24 are evenly installed on both sides of the floating heat storage base 21; the sliding blocks 24 are slidably installed on both sides of the kiln body 1; a plurality of power units 23 are respectively provided on the upper ends of both sides of the kiln body 1; the power units 23 drive the sliding blocks 24 to move up and down, and drive the floating heat storage base 21 and the floating heat storage cover plate 22 to move up and down; the front and rear ends of the heat storage tank 211 are respectively connected to the lifting guide 25; the upper end of the lifting guide 25 slides up and down and penetrates into the upper end exterior of the kiln body 1; a plurality of external positioning guides 26 are respectively fixedly installed on the front and rear exterior of the upper end of the kiln body 1; the lifting guide 25 is slidably inserted into the lower end interior of the external positioning guide 26.

[0024] like Figures 1 to 7As shown, in order for the power unit 23 to control the sliding block 24 to move up and down, further, the power unit 23 is a driving motor; a plurality of vertical guide rails 12 are provided on both sides of the kiln body 1; the sliding block 24 is slidably engaged in the vertical guide rails 12; built-in threaded columns 27 are rotatably installed in the vertical guide rails 12, and the built-in threaded columns 27 are threadedly screwed with the sliding block 24; the upper end of the built-in threaded column 27 is connected to the power unit 23, and the power unit 23 drives the built-in threaded column 27 to rotate forward and reverse.

[0025] like Figures 1 to 7 As shown, in order to separate the floating heat storage cover plate 22 and the floating heat storage base 21 after the firing is completed, and to make full use of the internal heat of the high temperature zone 11, further, a plurality of positioning protrusions 28 are respectively provided on both sides of the floating heat storage cover plate 22, and the positioning protrusions 28 are respectively inserted into the vertical rails 12; a positioning groove 281 is provided on the lower side of the positioning protrusion 28; a limiting column 29 is provided inside the lower side of the vertical rail 12; and a through hole 24 is provided on the sliding block 24. 1; the limiting column 29, the through hole 241, and the positioning groove 281 are correspondingly distributed in the upper and lower positions; the floating heat storage base 21 and the floating heat storage cover plate 22 move downward synchronously, the through hole 241 of the sliding block 24 penetrates the limiting column 29, and when the positioning groove 281 of the positioning clamping protrusion 28 abuts against the upper end of the limiting column 29, the floating heat storage cover plate 22 is limited by the limiting column 29 and stops moving downward, and the floating heat storage base 21 continues to move downward and separates from the floating heat storage cover plate 22. Further, the lower end of the built-in threaded column 27 is rotated and clamped to the lower end of the vertical guide rail 12 by rotating the clamping block.

[0026] like Figures 1 to 7 As shown, in order to improve the docking stability of the floating heat storage base 21 and the floating heat storage cover plate 22, further, the lower sides of both ends of the floating heat storage cover plate 22 are provided with docking plug-in protrusions 221; the upper sides of both ends of the floating heat storage base 21 are provided with docking grooves 212; the docking plug-in protrusions 221 and the docking grooves 212 correspond to each other in upper and lower positions and are matched and plugged. Further, the upper end section of the kiln body 1 is an arched structure that bulges upward. Further, the heat storage mechanism is made of high temperature resistant material. Further, the kiln body 1 is made of refractory heat-insulating material.

[0027] The present invention arranges a floating heat storage base 21 and a floating heat storage cover plate 22 above the interior of the high-temperature zone 11, and the floating heat storage cover plate 22 is installed to cover the floating heat storage base 21 and close a plurality of heat storage tanks 211, so that heat can be stored by the plurality of heat storage tanks 211, and air circulation and transportation are carried out by arranging lifting ducts 25 at both ends of the heat storage tanks 211, so that the heat of the kiln body 1 of the high-temperature zone 11 can be utilized, and at the same time, the airflow is not directly sucked from above the kiln body 1, which greatly reduces the impact on the temperature of the high-temperature zone 11, thereby achieving the characteristics of heat recovery, energy saving and environmental protection.

[0028] The present invention can drive the built-in threaded column 27 to rotate through the power unit 23, and the built-in threaded column 27 drives the sliding block 24 to move up and down, thereby driving the floating heat storage base 21 and the floating heat storage cover plate 22 to move up and down synchronously, so that the collection position of the residual heat can be adjusted according to the different firing temperatures of the blanks. When the firing temperature is low, the floating heat storage base 21 and the floating heat storage cover plate 22 can be driven to move downward to increase the collection temperature. At the same time, the collection position can be reasonably adjusted according to the different blank heights.

[0029] After the blank is fired, the heat inside the high-temperature zone 11 decreases, and the temperature inside the heat storage tank 211 will drop sharply. For this reason, the floating heat storage base 21 and the floating heat storage cover plate 22 can be moved downward synchronously in the present invention, so that the through hole 241 of the sliding block 24 is connected to the limiting column 29. When the positioning groove 281 of the positioning card convex abuts against the upper end of the limiting column 29 downward, the floating heat storage cover plate 22 stops moving downward due to the limitation of the limiting column 29, and the floating heat storage base 21 will continue to move downward and separate from the floating heat storage cover plate 22. In this way, the heat storage tank 211 is opened. At this time, the heat inside the high-temperature zone 11 is directly utilized when the airflow is circulated and transported through the lifting ducts 25 at both ends of the heat storage tank 211. In this way, the speed of the temperature drop of the circulating airflow can be slowed down, and the heat of the high-temperature zone 11 can be fully absorbed, so as to achieve the characteristics of fully recovering waste heat and reducing additional energy consumption.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A waste heat collection structure in the high temperature zone of a tunnel kiln, characterized in that: The invention comprises a kiln body and a heat storage mechanism; the interior of the kiln body is respectively provided with a preheating zone, a high temperature zone and a cooling zone from front to back; the heat storage mechanism is installed in the high temperature zone; the heat storage mechanism comprises a floating heat storage base, a floating heat storage cover plate, a power unit, a sliding block, a lifting pipe and an external positioning pipe; a plurality of heat storage tanks are evenly arranged on the upper side of the floating heat storage base, and the two ends of the heat storage tanks pass through the front and rear ends of the floating heat storage base; the floating heat storage cover plate is covered and installed on the upper side of the floating heat storage base and closes the plurality of heat storage tanks; a plurality of sliding blocks are evenly installed on both sides of the floating heat storage base; the sliding blocks are slidably installed on both sides of the kiln body; a plurality of power units are respectively provided on the upper ends of both sides of the kiln body; the power unit drives the sliding block to move up and down, and drives the floating heat storage base and the floating heat storage cover plate to move up and down; the front and rear ends of the heat storage tank are respectively connected to the lifting pipe; the upper end of the lifting pipe slides up and down and penetrates to the outer side of the upper end of the kiln body; a plurality of external positioning pipes are fixedly installed on the front and rear outer sides of the upper end of the kiln body; the lifting pipe is slidably plugged into the lower end of the external positioning pipe.

2. The waste heat collection structure of the high temperature zone of the tunnel kiln according to claim 1 is characterized in that: The power unit is a driving motor; a plurality of vertical guide rails are provided at the front and rear sides of the kiln body; the sliding block is slidably engaged in the vertical guide rails; built-in threaded columns are rotatably installed in the vertical guide rails, and the built-in threaded columns are threadedly engaged with the sliding block; the upper ends of the built-in threaded columns are connected to the power unit, and the power unit drives the built-in threaded columns to rotate forward and reversely.

3. The waste heat collection structure of the high temperature zone of the tunnel kiln according to claim 2 is characterized in that: A plurality of positioning protrusions are respectively provided on both sides of the floating heat storage cover plate, and the positioning protrusions are respectively inserted into the vertical tracks correspondingly; a positioning groove is provided on the lower side of the positioning protrusion; a limiting column is provided inside the lower side of the vertical track; a through hole is provided on the sliding block; the limiting column, the through hole and the positioning groove are correspondingly distributed in the upper and lower positions; the floating heat storage base and the floating heat storage cover plate move downward synchronously, and the through hole of the sliding block penetrates the limiting column, and when the positioning groove of the positioning protrusion abuts downward against the upper end of the limiting column, the floating heat storage cover plate is limited by the limiting column and stops moving downward, and the floating heat storage base continues to move downward and separates from the floating heat storage cover plate.

4. The waste heat collection structure in the high temperature zone of the tunnel kiln according to claim 2 is characterized in that: The lower end of the built-in threaded column is rotatably clamped to the lower end of the vertical guide rail through a rotating clamping block.

5. The waste heat collection structure in the high temperature zone of the tunnel kiln according to claim 1 is characterized in that: The lower sides of both ends of the floating heat storage cover plate are provided with docking plug-in protrusions; the upper sides of both ends of the floating heat storage base are provided with docking grooves; the upper and lower positions of the docking plug-in protrusions and the docking grooves correspond and match each other.

6. The waste heat collection structure of the high temperature zone of the tunnel kiln according to claim 1 is characterized in that: The upper end section of the kiln body is an upwardly convex arch structure.

7. The waste heat collection structure of the high temperature zone of the tunnel kiln according to claim 1 is characterized in that: The heat storage mechanism is made of high temperature resistant material.

8. The waste heat collection structure in the high temperature zone of the tunnel kiln according to claim 1, characterized in that: The kiln body is made of refractory heat-insulating material.

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