Anti-overpressure sodium silicate kiln

Abstract

The utility model relates to the technical field of sodium silicate kilns, in particular to an anti-overpressure sodium silicate kiln which comprises a kiln body, a heating cavity is arranged in the kiln body, a main exhaust pipe communicated with the heating cavity is arranged at the top of the kiln body, and a pressure relief pipe communicated with the heating cavity is further arranged at the top of the kiln body. The end, away from the heating cavity, of the pressure relief pipe is sealed through a cap, a spring is installed in the pressure relief pipe, one end of the spring is connected with the cap, the other end of the spring is connected with a piston, and multiple exhaust holes are formed in the side wall of the pressure relief pipe at intervals in the moving direction of the piston. By arranging the pressure relief pipe, when the pressure in the heating cavity is increased due to various reasons in the heating cavity, gas in the heating cavity can push the piston to compress the spring, so that the piston moves towards the cap, the exhaust hole can be communicated with the heating cavity, the gas in the heating cavity can be exhausted through the exhaust hole, and the purpose of pressure relief is achieved.

Description

Technical Field

[0001] This utility model relates to the field of sodium silicate kiln technology, specifically to a sodium silicate kiln that is resistant to overpressure. Background Technology

[0002] Sodium silicate, commonly known as sodium silicate, is a water-soluble silicate with many advantages such as strong adhesion, high strength, good acid resistance and heat resistance. Therefore, it has been widely used in many fields such as analytical reagents, fire retardants and adhesives.

[0003] In industrial production, sodium silicate is mainly produced by calcining silica sand and soda ash in a kiln at a high temperature of 1300-1400℃ to produce liquid sodium silicate. Then, it flows out from the kiln outlet, is formed into blocks or quenched in water to form granules, and finally dissolved in high temperature and high pressure water to produce water glass products.

[0004] During the sintering of sodium silicate, a slight positive pressure is typically maintained inside the kiln to prevent outside air from entering. However, existing sodium silicate kilns face the problem of overpressure during operation. On one hand, the combustion of fuel within the kiln produces a large amount of gas; if this gas is not properly expelled, the internal pressure will gradually increase. On the other hand, excessively rapid feeding or blockage of materials within the kiln can also cause a sharp rise in pressure.

[0005] Overpressure poses a significant safety hazard to sodium silicate kilns. Excessive pressure can damage the kiln's sealing structure, endangering not only the safety of operators but also potentially causing serious accidents such as fires. Furthermore, overpressure can disrupt the kiln's normal operation, leading to excessive temperature fluctuations and negatively impacting the quality of the sodium silicate product. Utility Model Content

[0006] The purpose of this invention is to provide a sodium silicate kiln that prevents overpressure, thereby solving the problem in the prior art where poor gas discharge from the kiln leads to overpressure inside the kiln, causing excessive temperature fluctuations and affecting the quality of sodium silicate products.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] An overpressure-resistant sodium silicate kiln includes a kiln body with a heating chamber inside. A main exhaust pipe connected to the heating chamber is located on the top of the kiln body. A pressure relief pipe connected to the heating chamber is also located on the top of the kiln body. The end of the pressure relief pipe away from the heating chamber is sealed by a cap. A spring is installed inside the pressure relief pipe, with one end connected to the cap and the other end connected to a piston. Multiple exhaust holes are spaced along the direction of piston movement on the side wall of the pressure relief pipe.

[0009] A further technical solution is that the cap is provided with a threaded hole that communicates with the inside of the pressure relief pipe. A screw is connected to the threaded hole with matching threads. One end of the screw passes into the pressure relief pipe and is connected to an adjusting plate. The end of the spring away from the piston is fixedly connected to the adjusting plate.

[0010] A further technical solution is that the exhaust pipe has a first channel and a second channel connected to each other along its length. The first channel is connected to the heating chamber, and the diameter of the second channel is larger than that of the first channel. Multiple exhaust holes are connected to the first channel. The piston includes a limiting plate and a sealing column. The limiting plate is located in the second channel, and the diameter of the limiting plate is smaller than that of the second channel but larger than that of the first channel. The outer wall of the sealing column slides against the inner wall of the first channel, and the spring is connected to the limiting plate.

[0011] A further technical solution is to have a top rod on the side of the limiting plate facing the adjusting plate, a trigger switch installed on the adjusting plate aligned with the top rod, and a buzzer electrically connected to the trigger switch installed on the outside of the kiln body.

[0012] A further technical solution is to connect a knob plate to one end of the screw located outside the pressure relief pipe.

[0013] A further technical solution is that the outer wall of the limiting plate slides against the inner wall of the second channel through a high-temperature resistant sealing ring.

[0014] A further technical solution is that a sealing plate is connected to the end of the sealing column away from the limiting plate, the edge of the sealing plate slides against the inner wall of the first channel, and multiple sliding strips are arranged around the outer wall of the sealing column along the length of the sealing column, and the sliding strips slide against the inner wall of the first channel.

[0015] A further technical solution is to connect the exhaust port to a pressure relief exhaust pipe.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting the main exhaust pipe, it can serve as an exhaust pipe during the normal use of the kiln body; 2. By setting the pressure relief pipe, when the pressure in the heating chamber increases due to various reasons, the gas in the heating chamber will push the piston to compress the spring, thereby causing the piston to move toward the cap, which will enable the exhaust hole to connect with the heating chamber, so that the gas in the heating chamber can be discharged through the exhaust hole, achieving the purpose of pressure relief. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an overpressure-resistant sodium silicate kiln according to the present invention.

[0018] Figure 2This is a schematic cross-sectional view of the pressure relief pipe of a sodium silicate kiln that is designed to prevent overpressure.

[0019] Figure 3 This is a schematic diagram of a sealing column for a sodium silicate kiln that is designed to prevent overpressure.

[0020] Icons: 1-Kiln body, 2-Main exhaust pipe, 3-Pressure relief pipe, 4-Cap, 5-Spring, 6-Piston, 7-Exhaust hole, 8-Threaded hole, 9-Screw, 10-Adjusting plate, 11-First channel, 12-Second channel, 13-Limiting plate, 14-Sealing column, 15-Top rod, 16-Trigger switch, 17-Buzzer, 18-Knob plate, 19-High temperature resistant sealing ring, 20-Sealing sheet, 21-Sliding strip, 22-Pressure relief exhaust pipe, 23-Feed pipe, 24-Discharge port. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] Figures 1 to 3 The following is an embodiment of the present invention.

[0023] Example 1:

[0024] An overpressure-resistant sodium silicate kiln includes a kiln body 1, a heating chamber inside the kiln body 1, a main exhaust pipe 2 connected to the heating chamber at the top of the kiln body 1, and a pressure relief pipe 3 connected to the heating chamber at the top of the kiln body 1. The end of the pressure relief pipe 3 away from the heating chamber is sealed by a cap 4. A spring 5 is installed inside the pressure relief pipe 3, one end of which is connected to the cap 4, and the other end is connected to a piston 6. Multiple exhaust holes 7 are spaced along the moving direction of the piston 6 on the side wall of the pressure relief pipe 3. The main exhaust pipe 2 serves as an exhaust channel during normal operation of the kiln body 1. By providing the pressure relief pipe 3, when the pressure inside the heating chamber increases due to various reasons, the gas in the heating chamber pushes the piston 6 to compress the spring 5, causing the piston 6 to move towards the cap 4. This allows the exhaust holes 7 to connect with the heating chamber, enabling the gas in the heating chamber to be discharged through the exhaust holes 7, thus achieving the purpose of pressure relief. The raw material is transported from the feed pipe 23 at the rear end of the kiln body 1 into the heating chamber, and the liquid sodium silicate is discharged from the discharge port 24 at the front side of the kiln body 1.

[0025] The cap 4 has a threaded hole 8 that communicates with the inside of the pressure relief pipe 3. A screw 9 is threadedly connected to the threaded hole 8. One end of the screw 9 passes into the pressure relief pipe 3 and is connected to an adjusting plate 10. The end of the spring 5 away from the piston 6 is fixedly connected to the adjusting plate 10. By setting the screw 9 and the threaded hole 8, the length of the screw 9 entering the pressure relief pipe 3 can be adjusted. This allows control over the distance between the adjusting plate 10 and the exhaust port 7. The closer the adjusting plate 10 is to the exhaust port 7, the more the piston 6 needs to compress the spring 5 to move the piston 6 to the side of the exhaust port 7 facing the adjusting plate 10, thus connecting the exhaust port 7 with the heating chamber. Based on this method, different pressure relief values ​​can be adjusted according to different lengths of the screw 9 entering the pressure relief pipe 3.

[0026] The exhaust pipe has a first channel 11 and a second channel 12 arranged sequentially along its length. The first channel 11 is connected to the heating chamber, and the diameter of the second channel 12 is larger than the diameter of the first channel 11. Multiple exhaust holes 7 are connected to the first channel 11. The piston 6 includes a limiting plate 13 and a sealing column 14. The limiting plate 13 is located inside the second channel 12, and its diameter is smaller than that of the second channel 12 but larger than that of the first channel 11. The outer wall of the sealing column 14 slides against the inner wall of the first channel 11. The spring 5 is connected to the limiting plate 13. When it is necessary to adjust the pressure relief value, the spring 5 is pre-compressed by rotating the screw 9 in conjunction with the limiting plate 13, thereby adjusting different pressure relief values. By setting the sealing column 14, the exhaust holes 7 can be blocked by the side wall of the sealing column 14 before pressure relief.

[0027] A push rod 15 is provided on the side of the limiting plate 13 facing the adjusting plate 10. A trigger switch 16 is installed on the adjusting plate 10 aligned with the push rod 15. A buzzer 17 electrically connected to the trigger switch 16 is installed on the outside of the kiln body 1. Generally, multiple exhaust holes 7 are provided along the length of the pressure relief pipe 3. As the pressure value of the heating chamber increases, it will push the piston 6 to continuously compress the spring 5, and at the same time, more exhaust holes 7 will be connected to the heating chamber to increase the exhaust volume for rapid pressure relief. When the spring 5 is compressed to the point that it drives the push rod 15 on the adjusting plate 10 to press against the trigger switch 16 and trigger the buzzer 17, it means that all the exhaust holes 7 are connected to the heating chamber. At this time, the maximum pressure relief has been opened. This indicates that the pressure value in the heating chamber has been overloaded. The buzzer 17 is used to remind the staff to check and avoid other accidents.

[0028] A knob plate 18 is connected to one end of the screw 9, which is located outside the pressure relief pipe 3. The knob plate 18 facilitates the operation of the screw 9 by the operator.

[0029] The outer wall of the limiting plate 13 slides against the inner wall of the second channel 12 via the high-temperature resistant sealing ring 19. By providing the high-temperature resistant sealing ring 19, the gap between the inner walls of the limiting plate 13 and the second channel 12 can be sealed.

[0030] A sealing plate 20 is connected to the end of the sealing column 14 away from the limiting plate 13. The edge of the sealing plate 20 slides against the inner wall of the first channel 11. Multiple sliding strips 21 are arranged around the outer wall of the sealing column 14 along its length, and these sliding strips 21 slide against the inner wall of the first channel 11. By setting the sealing plate 20, the first channel 11 can be blocked, thereby preventing gas in the heating chamber from escaping through the exhaust port 7 when pressure relief is not required. By setting the sliding strips 21, they can fit against the inner wall of the first channel 11, providing lateral support to the sealing column 14 while reducing the friction between the sealing column 14 and the inner wall of the first channel 11.

[0031] The exhaust port 7 is connected to a pressure relief exhaust pipe 22. The exhaust gas can be connected to the main exhaust pipe through the pressure relief exhaust pipe 22.

[0032] Although the present invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter combination within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A sodium silicate kiln with overpressure protection, comprising a kiln body (1), wherein a heating chamber is provided inside the kiln body (1), and a main exhaust pipe (2) communicating with the heating chamber is provided on the top of the kiln body (1), characterized in that, The top of the kiln body (1) is also provided with a pressure relief pipe (3) that is connected to the heating chamber. The end of the pressure relief pipe (3) away from the heating chamber is closed by a cap (4). A spring (5) is installed inside the pressure relief pipe (3). One end of the spring (5) is connected to the cap (4), and the other end is connected to a piston (6). Multiple exhaust holes (7) are provided at intervals along the moving direction of the piston (6) on the side wall of the pressure relief pipe (3).

2. The sodium silicate kiln for overpressure protection according to claim 1, characterized in that: The cap (4) is provided with a threaded hole (8) that communicates with the inside of the pressure relief pipe (3). A screw (9) is threadedly connected to the inside of the threaded hole (8). One end of the screw (9) is inserted into the pressure relief pipe (3) and connected to an adjusting plate (10). The end of the spring (5) away from the piston (6) is fixedly connected to the adjusting plate (10).

3. The sodium silicate kiln for overpressure protection according to claim 2, characterized in that: The exhaust pipe is provided with a first channel (11) and a second channel (12) connected to each other along its length. The first channel (11) is connected to the heating chamber. The diameter of the second channel (12) is larger than the diameter of the first channel (11). The multiple exhaust holes (7) are connected to the first channel (11). The piston (6) includes a limiting plate (13) and a sealing column (14). The limiting plate (13) is located in the second channel (12). The diameter of the limiting plate (13) is smaller than that of the second channel (12) and larger than that of the first channel (11). The outer wall of the sealing column (14) slides against the inner wall of the first channel (11). The spring (5) is connected to the limiting plate (13).

4. A sodium silicate kiln for overpressure protection according to claim 3, characterized in that: The limiting plate (13) is provided with a top rod (15) on the side facing the adjusting plate (10). The adjusting plate (10) is equipped with a trigger switch (16) aligned with the position of the top rod (15). A buzzer (17) electrically connected to the trigger switch (16) is installed on the outside of the kiln body (1).

5. A sodium silicate kiln for overpressure protection according to claim 3, characterized in that: The screw (9) is connected to a knob plate (18) at one end outside the pressure relief pipe (3).

6. A sodium silicate kiln for overpressure protection according to claim 3, characterized in that: The outer wall of the limiting plate (13) is slidably attached to the inner wall of the second channel (12) through the high temperature resistant sealing ring (19).

7. A sodium silicate kiln for overpressure protection according to claim 3, characterized in that: A sealing plate (20) is connected to one end of the sealing column (14) away from the limiting plate (13). The edge of the sealing plate (20) slides against the inner wall of the first channel (11). Multiple sliding strips (21) are arranged around the outer wall of the sealing column (14) along the length of the sealing column (14). The sliding strips (21) slide against the inner wall of the first channel (11).

8. A sodium silicate kiln for overpressure protection according to claim 1, characterized in that: The vent (7) is connected to a pressure relief vent pipe (22).

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