Tunnel kiln device for recycling waste heat of calcium carbide mold

Abstract

The tunnel kiln device comprises a tunnel kiln, a front chamber, a rear chamber and a plurality of isolation pieces, and the front chamber is arranged at an inlet of the tunnel kiln and communicates with the inlet of the tunnel kiln; the rear chamber is arranged at an outlet of the tunnel kiln and communicated with the outlet of the tunnel kiln, and the tunnel kiln, the front chamber, the rear chamber and the external environment are isolated from one another through isolation pieces. The front chamber, the rear chamber and the separators are additionally arranged at the inlet and the outlet of the calcium carbide mold of the tunnel kiln respectively, so that the tunnel kiln is effectively isolated from the external environment, high-temperature circulating air in the tunnel kiln is prevented from diffusing to the external environment, and hot air does not overflow when the calcium carbide mold enters and exits the tunnel kiln; and the heat utilization rate and the working environment comfort are improved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel kiln waste heat recovery, and in particular to a tunnel kiln device for recovering waste heat from a calcium carbide mold. Background Art

[0002] As society and enterprises continue to increase their requirements for energy utilization, waste heat recovery has gradually become more important. When calcium carbide is smelted and cooled during injection molding, the temperature of the calcium carbide liquid can reach 1600-1800℃, and the temperature after injection molding can also reach 1200℃, which contains a relatively high amount of heat.

[0003] In conventional production, calcium carbide liquid is naturally cooled in the mold, and the heat is directly dissipated into the atmosphere. There is currently a tunnel kiln in which calcium carbide liquid is cooled in the kiln and its heat is recovered. However, since the tunnel kiln is operated at positive pressure, a large amount of high-temperature air will flow into the environment from the inlet and outlet when the mold enters and exits the tunnel kiln chamber. At the same time, hot air will be dissipated into the environment from the gaps between the inlet and outlet for a long time, resulting in a large amount of heat waste. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a tunnel kiln device for recovering waste heat from calcium carbide molds, which solves the problem of hot air overflow when the calcium carbide molds enter and exit the tunnel kiln, and effectively improves energy utilization and the comfort of the working environment.

[0005] The present invention is achieved through the following technical solutions:

[0006] A tunnel kiln device for recovering waste heat from calcium carbide molds, comprising a tunnel kiln, a front chamber and a rear chamber, wherein the front chamber is arranged at the inlet of the tunnel kiln and communicated with the inlet of the tunnel kiln; the rear chamber is arranged at the outlet of the tunnel kiln and communicated with the outlet of the tunnel kiln, and the tunnel kiln device further comprises a plurality of isolators, wherein the plurality of isolators include:

[0007] A first isolation member, disposed at the entrance of the antechamber, for isolating the antechamber from the external environment;

[0008] A second isolation member is disposed between the antechamber and the tunnel kiln, and is used to isolate the antechamber from the tunnel kiln;

[0009] A third isolation member is disposed between the tunnel kiln and the rear chamber, and is used to isolate the rear chamber from the tunnel kiln;

[0010] A fourth isolation member is disposed at the outlet of the rear chamber and is used to isolate the rear chamber from the external environment.

[0011] Furthermore, the first isolating member and the second isolating member are both arranged on the front chamber, and the third isolating member and the fourth isolating member are both arranged on the rear chamber.

[0012] Furthermore, the isolation member adopts a standard plug-in isolation door.

[0013] Furthermore, the tunnel kiln device also includes a sensor, which is used to detect whether the calcium carbide mold passes through the isolation piece.

[0014] Furthermore, the isolating member includes a high temperature resistant baffle and a rotating shaft fixed on the top of the high temperature resistant baffle, and the high temperature resistant baffle can rotate around the axis direction where the rotating shaft is located.

[0015] Furthermore, the high temperature resistant baffle includes an isolation state and a non-isolation state. When the calcium carbide mold passes through the high temperature resistant baffle, the calcium carbide mold directly contacts the high temperature resistant baffle and pushes the high temperature resistant baffle to switch from the isolation state to the non-isolation state; when the calcium carbide mold continues to move until it loses contact with the high temperature resistant baffle, the high temperature resistant baffle relies on its own gravity to switch from the non-isolation state to the isolation state.

[0016] Furthermore, the high temperature resistant baffle includes an isolation state and a non-isolation state, and the tunnel kiln device also includes a conveying track and a conveying platform that can move along the conveying track. The conveying track passes through the front chamber, the tunnel kiln and the rear chamber at the same time. The calcium carbide mold is placed on the conveying platform, and a frame is fixed on the conveying platform. The frame is hollow and covered on the outside of the calcium carbide mold, and a plurality of rollers are arranged at the front end of the frame. A roller is arranged at the bottom position of the high temperature resistant baffle. When the frame passes through the high temperature resistant baffle, the roller contacts the high temperature resistant baffle and pushes the high temperature resistant baffle to switch from the isolation state to the non-isolation state; when the roller is out of contact with the high temperature resistant baffle, the roller contacts the top of the frame; when the frame continues to move until it is out of contact with the roller, the high temperature resistant baffle switches from the non-isolation state to the isolation state by its own gravity.

[0017] Furthermore, the rotating shafts on the first isolating member and the second isolating member can be rotatably disposed on the top of the front chamber; and the rotating shafts on the third isolating member and the fourth isolating member can be rotatably disposed on the top of the rear chamber.

[0018] Furthermore, the tunnel kiln device also includes an air inlet pipeline and a blower disposed on the air inlet pipeline, and the blower is used to extract natural wind from the external environment and send it to the front chamber and the rear chamber.

[0019] Furthermore, the air inlet pipeline includes a main pipeline and a first branch pipe and a second branch pipe connected in parallel to the main pipeline, the first branch pipe is connected to the front chamber, the second branch pipe is connected to the rear chamber, and the air supply fan is arranged on the main pipeline.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] By respectively installing a front chamber, a rear chamber and multiple isolation parts at the inlet and outlet of the calcium carbide mold of the tunnel kiln, the tunnel kiln is effectively isolated from the external environment, preventing the high-temperature circulating air in the tunnel kiln from diffusing to the external environment, and preventing hot air from overflowing when the calcium carbide mold enters and exits the tunnel kiln, thereby improving the heat utilization rate and the comfort of the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a tunnel kiln device according to an embodiment of the present invention;

[0023] Figure 2 A schematic structural diagram of a tunnel kiln device according to another embodiment of the present invention;

[0024] Figure 3 The state of the tunnel kiln device of another embodiment of the present invention is Figure 1 ;

[0025] Figure 4 The state of the tunnel kiln device of another embodiment of the present invention is Figure 2 .

[0026] 1. Tunnel kiln; 2. Front chamber; 3. Back chamber; 4. First isolating piece; 5. Second isolating piece; 6. Third isolating piece; 7. Fourth isolating piece; 8. High temperature resistant baffle; 80. Notch; 9. Rotating shaft; 100. Main pipe; 101. First branch pipe; 102. Second branch pipe; 20. Conveying track; 21. Conveying platform; 22. Frame; 220. Arc chamfer; 23. Roller; 24. Drum. DETAILED DESCRIPTION

[0027] The following is a further non-restrictive detailed description of the technical solution of the invention in conjunction with the preferred embodiments and the accompanying drawings. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and cannot be understood as limitations on the present invention.

[0028] like Figure 1 As shown, a tunnel kiln device for recovering waste heat from calcium carbide molds according to an embodiment of the present invention comprises a tunnel kiln 1, a front chamber 2, a rear chamber 3 and a plurality of isolating parts, wherein the front chamber 2 is arranged at the inlet of the tunnel kiln 1 and is connected to the inlet of the tunnel kiln 1; the rear chamber 3 is arranged at the outlet of the tunnel kiln 1 and is connected to the outlet of the tunnel kiln 1, and the tunnel kiln 1, the front chamber 2, the rear chamber 3 and the external environment are isolated from each other by isolating parts. By respectively installing the front chamber 2, the rear chamber 3 and a plurality of isolating parts at the inlet and outlet positions of the calcium carbide molds of the tunnel kiln 1, the tunnel kiln is effectively isolated from the external environment, and the high-temperature circulating air in the tunnel kiln is prevented from diffusing to the external environment, so that the hot air does not overflow when the calcium carbide molds enter and exit the tunnel kiln, thereby improving the heat utilization rate and the comfort of the working environment.

[0029] The tunnel kiln device also includes an air inlet pipeline and a blower disposed on the air inlet pipeline, and the blower is used to extract natural wind from the external environment and send it to the front chamber 2 and the rear chamber 3. Specifically, the air inlet pipeline includes a main pipeline 100 and a first branch pipe 101 and a second branch pipe 102 connected in parallel to the main pipeline 100, the first branch pipe 101 is connected to the front chamber 2, the second branch pipe 102 is connected to the rear chamber 3, and the blower is disposed on the main pipeline 100.

[0030] In this embodiment, the multiple isolation members specifically include a first isolation member 4, a second isolation member 5, a third isolation member 6 and a fourth isolation member 7. The first isolation member 4 is arranged at the entrance of the front chamber 2 to isolate the front chamber 2 from the external environment; the second isolation member 5 is arranged between the front chamber 2 and the tunnel kiln 1 to isolate the front chamber 2 from the tunnel kiln 1; the third isolation member 6 is arranged between the tunnel kiln 1 and the rear chamber 3 to isolate the rear chamber 3 from the tunnel kiln 1; the fourth isolation member 7 is arranged at the exit of the rear chamber 3 to isolate the rear chamber 3 from the external environment.

[0031] The first isolating member 4 and the second isolating member 5 are both arranged on the front chamber 2 , and the third isolating member 6 and the fourth isolating member 7 are both arranged on the rear chamber 3 .

[0032] like Figure 1 As shown, in one embodiment of the present invention, the isolating element adopts a standard plug-in type isolating door, and the standard plug-in type isolating door is an existing finished product structure, and the specific structure is not repeated here. In addition, a sensor (not shown in the figure) needs to be set up to be used in combination with the standard plug-in type isolating door. The sensor is used to detect whether the calcium carbide mold passes through the isolating element. When the sensor detects that the calcium carbide mold reaches a preset position, the controller controls the standard plug-in type isolating door to open. When the calcium carbide mold completely passes through the current standard plug-in type isolating door, it closes automatically. By setting the sensor, the standard plug-in type isolating door can be automatically opened and closed when the calcium carbide mold enters and exits the tunnel kiln. The specific process is as follows: when the calcium carbide mold enters from the external environment, the first isolating member 4 is opened first, and the calcium carbide mold begins to enter the front chamber 2. When the mold completely enters the front chamber 2, the first isolating member 4 is closed, the second isolating member 5 is opened, and the calcium carbide mold begins to enter the tunnel kiln 1 from the front chamber 2. When the calcium carbide mold completely enters the tunnel kiln 1, the second isolating member 5 is automatically closed, and the mold is cooled in the tunnel kiln 1. During the whole process, the blower is started and a certain amount of sealed air is introduced into the front chamber 2. Most of the sealed air is released into the external environment, and a small part of the sealed air enters the tunnel kiln 1 through the gap between the front chamber 2 and the tunnel kiln 1, so as to prevent the hot air in the tunnel kiln 1 from entering the external environment through the front chamber 2. When the mold is cooled in the tunnel kiln 1 and enters the external environment, the third isolating member 6 is opened first, and the calcium carbide mold begins to enter the rear chamber 3. When the calcium carbide mold completely enters the rear chamber 3, the third isolating member 6 is closed, the fourth isolating member 7 is opened, and the calcium carbide mold begins to enter the external environment from the rear chamber 3. When the calcium carbide mold completely leaves the rear chamber 3, the fourth isolating member 7 is automatically closed. During the whole process, a certain amount of sealed air is introduced into the rear chamber 3, most of which is released into the external environment, and a small part of the sealed air enters the tunnel kiln 1 through the gap between the rear chamber 3 and the tunnel kiln 1, thereby preventing the hot air in the tunnel kiln 1 from entering the external environment through the rear chamber 3. This design does not require additional power drive for the opening and closing of the high temperature baffle 8, thus saving energy consumption.

[0033] like Figure 2-Figure 4As shown, in another embodiment of the present invention, the isolation member includes a high temperature resistant baffle 8 and a rotating shaft 9 fixed on the top of the high temperature resistant baffle 8, and the high temperature resistant baffle 8 can rotate around the axis direction where the rotating shaft 9 is located. Among them, the rotating shaft 9 on the first isolation member 4 and the second isolation member 5 can be rotatably arranged on the top of the front chamber 2, and the rotating shaft 9 on the third isolation member 6 and the fourth isolation member 7 can be rotatably arranged on the top of the rear chamber 3.

[0034] The high temperature baffle 8 includes an isolation state and a non-isolation state. When the calcium carbide mold passes through the high temperature baffle 8, the calcium carbide mold directly contacts the high temperature baffle 8 and pushes the high temperature baffle 8 to switch from the isolation state to the non-isolation state; when the calcium carbide mold continues to move until it is out of contact with the high temperature baffle 8, the high temperature baffle 8 switches from the non-isolation state to the isolation state by its own gravity. The specific process is as follows: when the calcium carbide mold enters the tunnel kiln 1 from the external environment, the high temperature baffle 8 between the front chamber 2 and the external environment is first opened by the power of the conveying track. After the calcium carbide mold completely enters the front chamber 2, the high temperature baffle 8 restores its vertical state by its own gravity, which plays a role in isolating the front chamber 2 from the external environment; when the calcium carbide mold enters the tunnel kiln 1 from the front chamber 2, the high temperature baffle 8 between the front chamber 2 and the tunnel kiln 1 is first opened by its own power. After the calcium carbide mold completely enters the tunnel kiln 1, the high temperature baffle 8 restores its vertical state by its own gravity, which plays a role in isolating the front chamber 2 from the tunnel kiln 1. During the whole process, the blower starts and introduces a certain amount of sealed air into the front chamber 2. Most of the sealed air is released into the external environment, and a small part of the sealed air enters the tunnel kiln 1 through the gap between the front chamber 2 and the tunnel kiln 1, preventing the hot air in the tunnel kiln 1 from entering the external environment through the front chamber 2. When the calcium carbide mold is cooled in the tunnel kiln 1 and enters the external environment, it first relies on its own power to push open the high-temperature baffle 8 between the tunnel kiln 1 and the rear chamber 3. When the calcium carbide mold completely enters the rear chamber 3, the high-temperature baffle 8 relies on its own gravity to restore its vertical state, which plays a role in isolating the tunnel kiln 1 from the front chamber 2; when the calcium carbide mold enters the external environment from the rear chamber 3, it first relies on its own power to push open the high-temperature baffle 8 between the rear chamber 3 and the external environment. When the calcium carbide mold completely enters the external environment, the high-temperature baffle 8 relies on its own gravity to restore its vertical state, which plays a role in isolating the rear chamber 3 from the external environment. During the whole process, a certain amount of sealed air is introduced into the rear chamber 3, most of which is released into the external environment, and a small part of the sealed air enters the tunnel kiln 1 through the gap between the rear chamber 3 and the tunnel kiln 1, thereby preventing the hot air in the tunnel kiln 1 from entering the external environment through the rear chamber 3. This design does not require additional power drive for the opening and closing of the high temperature baffle 8, thus saving energy consumption.

[0035] Preferably, the tunnel kiln device also includes a conveying track 20 and a conveying platform 21 that can move along the conveying track 20. The conveying track 20 passes through the front chamber 2, the tunnel kiln 1 and the rear chamber 3 at the same time. The calcium carbide mold is placed on the conveying platform 21. A frame 22 is fixed on the conveying platform 21. The frame 22 is hollow and is covered on the outside of the calcium carbide mold. A plurality of rollers 23 are arranged at the front end of the frame 22. A roller 24 is arranged at the bottom position of the high temperature resistant baffle 8. When the frame 22 passes through the high temperature resistant baffle 8, the roller 23 contacts the high temperature resistant baffle 8 and pushes the high temperature resistant baffle 8 from an isolated state to a non-isolated state; when the roller 23 loses contact with the high temperature resistant baffle 8, the roller 24 contacts the top of the frame 22; when the frame 22 continues to move until it loses contact with the roller 24, the high temperature resistant baffle 8 switches from a non-isolated state to an isolated state by its own gravity. This design does not require additional power to open and close the high temperature baffle 8, saving energy consumption, and by providing the roller 23 and the drum 24, the friction between the frame 22 and the high temperature baffle 8 can be reduced to prevent the high temperature baffle 8 from being cut. It is worth noting that the roller 23 and the drum 24 here both use rolling action to replace the friction caused by direct contact. Therefore, the roller 23 and the drum 24 can be used interchangeably.

[0036] Of course, in order to ensure the stability of the contact between the frame 22 and the high temperature resistant baffle 8 , a plurality of rollers 23 may be provided, and the plurality of rollers 23 are evenly and symmetrically distributed at the front end of the frame 22 .

[0037] In addition, in order to ensure that the roller 24 does not affect the isolation performance of the high temperature resistant baffle 8, a notch 80 is opened at the bottom of the high temperature resistant baffle 8 for fixing the roller 24, thereby ensuring that the high temperature resistant baffle 8 can still play a good partitioning role in the isolation state.

[0038] In addition, a circular chamfer 220 is provided at the top of one end of the frame 22 away from the roller 23 to prevent the edge of the frame 22 from interfering with the bottom of the high temperature resistant baffle 8 at the moment when the roller 24 and the frame 22 are out of contact.

[0039] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A tunnel kiln device for recovering waste heat from calcium carbide molds, characterized in that: The invention comprises a tunnel kiln (1), a front chamber (2) and a rear chamber (3), wherein the front chamber (2) is arranged at the inlet of the tunnel kiln (1) and is in communication with the inlet of the tunnel kiln (1); the rear chamber (3) is arranged at the outlet of the tunnel kiln (1) and is in communication with the outlet of the tunnel kiln (1); the tunnel kiln device further comprises a plurality of isolating members, wherein the plurality of isolating members comprises: A first isolation member (4) is disposed at the entrance of the front chamber (2) and is used to isolate the front chamber (2) from the external environment; A second isolation member (5) is disposed between the antechamber (2) and the tunnel kiln (1) and is used to isolate the antechamber (2) and the tunnel kiln (1); A third isolation member (6) is disposed between the tunnel kiln (1) and the rear chamber (3) and is used to isolate the rear chamber (3) from the tunnel kiln (1); A fourth isolation member (7) is arranged at the outlet of the rear chamber (3) and is used to isolate the rear chamber (3) from the external environment.

2. A tunnel kiln device for recovering waste heat from calcium carbide molds according to claim 1, characterized in that: The first isolating member (4) and the second isolating member (5) are both arranged on the front chamber (2), and the third isolating member (6) and the fourth isolating member (7) are both arranged on the rear chamber (3).

3. A tunnel kiln device for recovering waste heat from calcium carbide molds according to claim 1, characterized in that: The isolation member adopts a standard plug-in type isolation door.

4. A tunnel kiln device for recovering waste heat from calcium carbide molds according to claim 3, characterized in that: The tunnel kiln device further comprises a sensor, and the sensor is used for detecting whether the calcium carbide mold passes through the isolation member.

5. The tunnel kiln device for recovering waste heat from calcium carbide molds according to claim 1, characterized in that: The isolating member comprises a high temperature resistant baffle plate (8) and a rotating shaft (9) fixed on the top of the high temperature resistant baffle plate (8); the high temperature resistant baffle plate (8) can rotate around the axis direction where the rotating shaft (9) is located.

6. A tunnel kiln device for recovering waste heat from calcium carbide molds according to claim 5, characterized in that: The high temperature resistant baffle (8) includes an isolation state and a non-isolation state. When the calcium carbide mold passes through the high temperature resistant baffle (8), the calcium carbide mold directly contacts the high temperature resistant baffle (8) and pushes the high temperature resistant baffle (8) to switch from the isolation state to the non-isolation state; when the calcium carbide mold continues to move until it is out of contact with the high temperature resistant baffle (8), the high temperature resistant baffle (8) switches from the non-isolation state to the isolation state by its own gravity.

7. A tunnel kiln device for recovering waste heat from calcium carbide molds according to claim 5, characterized in that: The high temperature resistant baffle (8) includes an isolation state and a non-isolation state. The tunnel kiln device also includes a conveying track (20) and a conveying platform (21) that can move along the conveying track (20). The conveying track (20) passes through the front chamber (2), the tunnel kiln (1) and the rear chamber (3) at the same time. The calcium carbide mold is placed on the conveying platform (21). A frame (22) is fixed on the conveying platform (21). The frame (22) is hollow and is covered on the outside of the calcium carbide mold. A plurality of rollers (23) are arranged at the front end of the frame (22). The high temperature resistant baffle ( A roller (24) is provided at the bottom of the frame (22); when the frame (22) passes the high temperature resistant baffle (8), the roller (23) contacts the high temperature resistant baffle (8) and pushes the high temperature resistant baffle (8) to switch from the isolated state to the non-isolated state; when the roller (23) is out of contact with the high temperature resistant baffle (8), the roller (24) contacts the top of the frame (22); when the frame (22) continues to move until it is out of contact with the roller (24), the high temperature resistant baffle (8) switches from the non-isolated state to the isolated state by its own gravity.

8. The tunnel kiln device for recovering waste heat from calcium carbide molds according to claim 5, characterized in that: The rotating shafts (9) on the first isolating member (4) and the second isolating member (5) can be rotatably arranged on the top of the front chamber (2); the rotating shafts (9) on the third isolating member (6) and the fourth isolating member (7) can be rotatably arranged on the top of the rear chamber (3).

9. The tunnel kiln device for recovering waste heat from calcium carbide molds according to claim 1, characterized in that: The tunnel kiln device also includes an air inlet pipeline and a blower arranged on the air inlet pipeline, wherein the blower is used to extract natural wind from the external environment and send it to the front chamber (2) and the rear chamber (3).

10. A tunnel kiln device for recovering waste heat from calcium carbide molds according to claim 9, characterized in that: The air inlet pipeline comprises a main pipeline (100) and a first branch pipe (101) and a second branch pipe (102) connected in parallel to the main pipeline (100); the first branch pipe (101) is connected to the front chamber (2), the second branch pipe (102) is connected to the rear chamber (3), and the air blower is arranged on the main pipeline (100).

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