A Sealing Device for Platinum Resistance Thermometer in Sulfur-Burning Furnace

Abstract

The present invention discloses a sealing device for a platinum resistance thermometer of a sulfur-burning furnace, which includes a lower sealing body seat connected to the sulfur-burning furnace, an upper sealing body seat arranged on the lower sealing body seat, a pipeline arranged in the upper sealing body seat and the lower sealing body seat, a thermometer protection sleeve arranged in the pipeline, and a sealing cavity formed between the inner wall of the pipeline and the outer wall of the thermometer protection sleeve; an injection hole communicating with the pipeline is arranged on the upper sealing body seat; an asbestos rope filling layer and a pressure-resistant plugging layer are sequentially arranged in the sealing cavity from bottom to top; the thermometer protection sleeve penetrates through the pipeline and extends into the sulfur-burning furnace. The asbestos rope filling layer and the pressure-resistant plugging layer are used to block the leakage of smoke and even the spraying of fire in the sulfur-burning furnace to enhance the blocking effect of the device. The arrangement of the injection hole can add a pressure-resistant plugging sealant into the sealing cavity to increase the thickness of the pressure-resistant plugging layer, so as to achieve a long-term plugging and sealing effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermometer sealing devices, and particularly relates to a sealing device for a platinum resistance thermometer in a sulfur-burning furnace. Background Art

[0002] A sulfur-burning furnace is a furnace for burning sulfur in a sulfuric acid production system using sulfur, abbreviated as a sulfur-burning furnace. Sulfur is sprayed into the furnace through a spray gun, and air enters from the end and passes through a swirling device to fully contact the atomized sulfur for combustion. There are two baffle walls in the furnace to fully mix sulfur and air. To prevent incomplete combustion, a secondary air inlet is generally provided to supplement the oxygen content and adjust the temperature in the furnace to make the reaction more complete and avoid the generation of sublimated sulfur. Therefore, the accurate measurement of the temperature in the sulfur-burning furnace is an important indicator for the stable operation and system adjustment of the sulfuric acid system. When measuring the temperature in the sulfur-burning furnace, in order not to affect the reaction in the sulfur-burning furnace, the connection between the thermometer and the sulfur-burning furnace needs to be sealed.

[0003] Currently, a thermometer protection sleeve without a flange is used. After being used for a certain period of time, even if it is bent by high temperature, the head of the temperature protection sleeve can be removed, and the bent and deformed temperature protection sleeve can be easily hammered into the furnace cavity with a hammer, so as to replace the new protection sleeve and thermometer. However, the sealing problem is still a difficult problem. Leakage is likely to occur between the thermometer mounting seat and the thermometer protection sleeve, resulting in smoke leakage or even flame spraying, damaging the thermometer and the temperature compensation wire, and thus unable to accurately detect the temperature in the furnace cavity; emergency treatment or even shutdown is required to handle this failure.

[0004] When a platinum resistance thermometer protection sleeve with a flange is used, a high-temperature resistant asbestos end is added at the connection between the flange and the thermometer mounting seat and connected with bolts. This method solves the sealing problem of the thermometer, but when the temperature protection sleeve is deformed by high temperature and needs to be replaced, it is impossible to pull out the thermometer protection sleeve, so it is very difficult to replace the thermometer. Summary of the Invention

[0005] In order to solve the above problems, the present invention aims to provide a sealing device for a platinum resistance thermometer in a sulfur-burning furnace to solve the sealing problem at the connection between the thermometer and the sulfur-burning furnace.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A sealing device for a platinum resistance thermometer in a sulfur-burning furnace includes a sealing lower body seat connected to the sulfur-burning furnace, a sealing upper body seat provided on the sealing lower body seat, a pipeline provided in the sealing upper body seat and the sealing lower body seat, a thermometer protection sleeve provided in the pipeline, and a sealing cavity formed between the inner wall of the pipeline and the outer wall of the thermometer protection sleeve;

[0008] An injection hole communicating with the pipeline is provided on the sealing upper body seat;

[0009] An asbestos rope filling layer and a pressure - resistant leak - plugging layer are sequentially arranged from bottom to top in the sealing cavity;

[0010] The thermometer protection sleeve penetrates through the pipeline and extends into the sulfur - burning furnace.

[0011] Preferably, the lower sealing body seat and the upper sealing body seat are connected by a quick - disassembly and assembly structure.

[0012] Preferably, a flange is provided at the connection between the lower sealing body seat and the upper sealing body seat; the flange includes a lower body seat flange provided at the top of the lower sealing body seat and an upper body seat flange provided at the bottom of the upper sealing body seat; the quick - disassembly and assembly structure is provided at the connection between the lower body seat flange and the upper body seat flange.

[0013] Preferably, the quick - disassembly and assembly structure includes bolt holes correspondingly provided at the connection between the lower body seat flange and the upper body seat flange, and bolts and nuts used in cooperation with the bolt holes.

[0014] Preferably, an asbestos gasket is further provided between the lower body seat flange and the upper body seat flange.

[0015] Preferably, the pipeline is welded inside the lower sealing body seat and the upper sealing body seat; the pipeline includes a first straight pipe provided inside the lower sealing body seat and a second straight pipe provided inside the upper sealing body seat and communicating with the first straight pipe.

[0016] Preferably, the sealing cavity includes a first sealing cavity formed by the inner wall of the first straight pipe and the outer wall of the thermometer protection sleeve, and a second sealing cavity formed by the inner wall of the second straight pipe and the outer wall of the thermometer protection sleeve; the asbestos rope filling layer is provided in the first sealing cavity; the pressure - resistant leak - plugging layer is provided on the asbestos rope filling layer and extends towards the second sealing cavity.

[0017] Preferably, the top of the second straight pipe is connected to the upper sealing body seat through a washer; the washer has a hole for passing through the thermometer protection sleeve.

[0018] Preferably, a plugging cover is connected to the injection hole.

[0019] Preferably, the injection hole and the plugging cover are connected by threads; internal threads are provided on the inner wall of the injection hole, and external threads adapted to the internal threads are provided on the plugging cover.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] A sealing device for a platinum resistance thermometer in a sulfur-burning furnace of the present invention adopts an asbestos rope filling layer and a pressure-bearing leak plugging layer which are sequentially arranged from bottom to top in the sealing cavity to plug the smoke leakage and even flame spraying in the sulfur-burning furnace, so as to enhance the plugging effect of the device.

[0022] An injection hole communicating with the pipeline is arranged on the upper seat of the seal. The arrangement of the injection hole can add a pressure-bearing leak plugging sealant into the sealing cavity to increase the thickness of the pressure-bearing leak plugging layer, so as to achieve a long-term leak plugging and sealing effect.

[0023] The lower seat of the seal is connected with the upper seat of the seal through a quick disassembly and assembly structure. When the unit is shut down for maintenance and the thermometer protection sleeve needs to be replaced, the bolt and nut can be removed by using a wrench, reducing the difficulty of maintenance and replacement, and at the same time ensuring the maintenance efficiency. It can also be repeated after the thermometer or the thermometer protection sleeve is repaired and replaced.

[0024] An asbestos gasket is also arranged between the flange of the lower seat and the flange of the upper seat to enhance the sealing effect of the device. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic structural diagram of a sealing device for a platinum resistance thermometer in a sulfur-burning furnace of the present invention;

[0027] Figure 2 It is a schematic structural diagram of the lower seat of the seal of the present invention;

[0028] Figure 3 It is a schematic structural diagram of the upper seat of the seal of the present invention;

[0029] Figure 4 It is a schematic structural diagram of a sealing device for a platinum resistance thermometer in a sulfur-burning furnace of the present invention during use;

[0030] Reference numerals: 1 - lower seat of the seal, 2 - upper seat of the seal, 3 - pipeline, 31 - first straight pipe, 32 - second straight pipe, 4 - thermometer protection sleeve, 5 - sealing cavity, 51 - first sealing cavity, 52 - second sealing cavity, 6 - injection hole, 7 - asbestos rope filling layer, 8 - pressure-bearing leak plugging layer, 9 - sulfur-burning furnace, 10 - flange of the lower seat, 11 - flange of the upper seat, 12 - bolt hole, 13 - bolt, 14 - nut, 15 - asbestos gasket, 16 - washer, 17 - plugging cover. Detailed Embodiments

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments. Without departing from the above technical idea of the present invention, all modifications, substitutions, and changes made according to common general knowledge and customary means in the art are included in the scope of the present invention.

[0032] With reference to Figures 1 to 4 , a sulfur-burning furnace platinum resistance thermometer sealing device in the present invention includes a sealing lower body seat 1 connected to a sulfur-burning furnace 9. In this embodiment, the sealing lower body seat 1 is welded to the sulfur-burning furnace 9; in other embodiments, the sealing lower body seat 1 can also be installed on the sulfur-burning furnace 9 through fixing bolts.

[0033] A sealing upper body seat 2 is provided on the sealing lower body seat 1. As a preferred solution of this embodiment, the sealing lower body seat 1 and the sealing upper body seat 2 are connected by a quick-disassembly and assembly structure; specifically, a flange is provided at the connection between the sealing lower body seat 1 and the sealing upper body seat 2; the flange includes a lower body seat flange 10 provided at the top of the sealing lower body seat 1 and an upper body seat flange 11 provided at the bottom of the sealing upper body seat 2. The lower body seat flange 10 is adapted to the upper body seat flange, that is, they have the same shape and structure; the quick-disassembly and assembly structure is provided at the connection between the lower body seat flange 10 and the upper body seat flange 11; the quick-disassembly and assembly structure includes bolt holes 12 corresponding to the connection between the lower body seat flange 10 and the upper body seat flange 11, and bolts 13 and nuts 14 used in cooperation with the bolt holes 12. Specifically, when the sealing upper body seat 2 is installed on the sealing lower body seat 1, the bolt 13 passes through the bolt holes 12 corresponding to the connection between the lower body seat flange 10 and the upper body seat flange 11, and a nut 14 is provided at each of the two side ends of the bolt 13 for cooperation. Tightening the nut 14 can connect the lower body seat flange 10 and the upper body seat flange 11 together, that is, connect the sealing lower body seat 1 and the sealing upper body seat 2 together through the quick-disassembly and assembly structure. In other embodiments, the sealing lower body seat 1 and the sealing upper body seat 2 can also be integrally provided.

[0034] An asbestos gasket 15 is also provided between the lower body seat flange 10 and the upper body seat flange 11 to enhance the sealing effect of the device.

[0035] A pipe 3 is arranged inside the upper sealing body seat 2 and the lower sealing body seat 1, and the pipe 3 is welded inside the lower sealing body seat 1 and the upper sealing body seat 2; the pipe 3 includes a first straight pipe 31 arranged inside the lower sealing body seat 1 and a second straight pipe 32 arranged inside the upper sealing body seat 2 and communicating with the first straight pipe 31; and the inner diameters of the first straight pipe 31 and the second straight pipe 32 are equal.

[0036] A thermometer protection sleeve 4 for installing a platinum resistance thermometer is arranged inside the pipe 3. The thermometer protection sleeve 4 penetrates through the first straight pipe 31 and the second straight pipe 32, and one end extends into the sulfur-burning furnace 9 to facilitate the temperature measurement inside the sulfur-burning furnace 9; the other end extends out of the upper sealing body seat 2; the top of the second straight pipe 32 is connected to the upper sealing body seat 2 through a gasket 16; the gasket 16 has a hole for passing through the thermometer protection sleeve 4; the inner diameter of the hole matches the outer diameter of the thermometer protection sleeve 4 to facilitate the thermometer protection sleeve 4 passing through the hole.

[0037] A sealing cavity 5 is formed between the inner wall of the pipe 3 and the outer wall of the thermometer protection sleeve 4; an asbestos rope filling layer 7 and a pressure-bearing leak plugging layer 8 are sequentially arranged in the sealing cavity 5 from bottom to top. Specifically, the sealing cavity 5 includes a first sealing cavity 51 formed by the inner wall of the first straight pipe 31 and the outer wall of the thermometer protection sleeve 4, and a second sealing cavity 52 formed by the inner wall of the second straight pipe 32 and the outer wall of the thermometer protection sleeve 4; the asbestos rope filling layer 7 is arranged inside the first sealing cavity 51; the pressure-bearing leak plugging layer 8 is arranged on the asbestos rope filling layer 7 and extends towards the second sealing cavity 52. The asbestos rope filling layer 7 is formed by pressing and filling asbestos ropes, and the pressure-bearing leak plugging layer 8 is formed by a pressure-bearing leak plugging sealant; during specific production, first arrange the asbestos rope filling layer 7 inside the first sealing cavity 51, and then fill the pressure-bearing leak plugging sealant on the asbestos rope filling layer 7 and extend it towards the second sealing cavity 52.

[0038] To ensure the sufficient plugging effect of the pressure-bearing leak plugging layer 8, an injection hole 6 communicating with the pipe 3 is arranged on the upper sealing body seat 2. During actual use, that is, when there is a smoke leakage phenomenon in the device, without shutting down the sulfur-burning furnace, open the injection hole 6 and inject a high-temperature-resistant pressure-bearing leak plugging sealant into the second sealing cavity 52 to increase the thickness of the pressure-bearing leak plugging layer 8, so as to achieve a long-term leak plugging and sealing effect. A plugging cover 17 is connected to the injection hole 6. The injection hole 6 and the plugging cover 17 are connected by threads; internal threads are arranged on the inner wall of the injection hole 6, and external threads adapted to the internal threads are arranged on the plugging cover 17.

[0039] The lower sealing body base 1 and the upper sealing body base 2 are connected by a quick disassembly and assembly structure. When it is necessary to stop the machine for maintenance and replace the thermometer protection sleeve 4, use a wrench to remove the nut 14 and the bolt 13, pull out the thermometer protection sleeve 4, or knock and insert the bent thermometer protection sleeve 4 into the sulfur-burning furnace 9. Then use tools to clean the asbestos rope filling layer 7 and the pressure plugging layer 8, and then replace them with a new platinum resistance thermometer, a thermometer protection sleeve 4 for installing the platinum resistance thermometer, an asbestos rope filling layer 7 and a pressure plugging layer 8, so that it can be used repeatedly or for a long time.

[0040] The above has introduced in detail a sulfur-burning furnace platinum resistance thermometer sealing device provided by the present invention. Specific examples are used in this article to elaborate on the structure and working principle of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A sealing device for a platinum resistance thermometer in a sulfur-burning furnace, characterized in that: It includes a sealed lower body seat (1) connected to a sulfur-burning furnace (9), a sealed upper body seat (2) provided on the sealed lower body seat (1), a pipeline (3) provided in the sealed upper body seat (2) and the sealed lower body seat (1), a thermometer protection sleeve (4) provided in the pipeline (3), and a sealed cavity (5) formed by the inner wall of the pipeline (3) and the outer wall of the thermometer protection sleeve (4); An injection hole (6) communicating with the pipeline (3) is provided on the sealed upper body seat (2); An asbestos rope filling layer (7) and a pressure - resistant leak - plugging layer (8) are sequentially arranged in the sealed cavity (5) from bottom to top; The thermometer protection sleeve (4) penetrates through the pipeline (3) and extends into the sulfur-burning furnace (9); The sealed lower body seat (1) and the sealed upper body seat (2) are connected by a quick - disassembly and assembly structure; A flange is provided at the connection between the sealed lower body seat (1) and the sealed upper body seat (2); the flange includes a lower body seat flange (10) provided at the top of the sealed lower body seat (1), and an upper body seat flange (11) provided at the bottom of the sealed upper body seat (2); the quick - disassembly and assembly structure is provided at the connection between the lower body seat flange (10) and the upper body seat flange (11); The pipeline (3) is welded in the sealed lower body seat (1) and the sealed upper body seat (2); the pipeline (3) includes a first straight pipe (31) provided in the sealed lower body seat (1), and a second straight pipe (32) provided in the sealed upper body seat (2) and communicating with the first straight pipe (31); The sealed cavity (5) includes a first sealed cavity (51) formed by the inner wall of the first straight pipe (31) and the outer wall of the thermometer protection sleeve (4), and a second sealed cavity (52) formed by the inner wall of the second straight pipe (32) and the outer wall of the thermometer protection sleeve (4); the asbestos rope filling layer (7) is provided in the first sealed cavity (51); the pressure - resistant leak - plugging layer (8) is provided on the asbestos rope filling layer (7) and extends towards the second sealed cavity (52).

2. The sealing device for a platinum resistance thermometer in a sulfur-burning furnace according to claim 1, characterized in that: The quick - disassembly and assembly structure includes bolt holes (12) correspondingly provided at the connection between the lower body seat flange (10) and the upper body seat flange (11), and bolts (13) and nuts (14) used in cooperation with the bolt holes (12).

3. The sealing device for a platinum resistance thermometer in a sulfur-burning furnace according to claim 1, characterized in that: An asbestos gasket (15) is further provided between the lower body seat flange (10) and the upper body seat flange (11).

4. The sealing device for a platinum resistance thermometer in a sulfur-burning furnace according to claim 1, characterized in that: The top of the second straight pipe (32) is connected to the sealed upper body seat (2) through a washer (16); the washer (16) has a hole for passing through the thermometer protection sleeve (4).

5. The sealing device for a platinum resistance thermometer in a sulfur-burning furnace according to claim 1, characterized in that: A plugging cover (17) is connected to the injection hole (6).

6. The sealing device for a platinum resistance thermometer in a sulfur-burning furnace according to claim 5, characterized in that: The injection hole (6) and the plugging cover (17) are connected by threads; internal threads are provided on the inner wall of the injection hole (6), and external threads adapted to the internal threads are provided on the plugging cover (17).

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