Propane dehydrogenation temperature thermocouple

Abstract

The utility model discloses a propane dehydrogenation temperature thermocouple, which is characterized in that a temperature measuring core body is integrally fixed, so that a temperature measuring point of the temperature measuring core body is fixed at a position where the temperature needs to be measured and / or monitored, a thermocouple positioning cover is arranged at the position, and after the temperature measuring core body is bent to form a bent structure, the thermocouple positioning cover is arranged at the position. And a temperature measuring point at the tail end of the temperature measuring core body is arranged between the internal network and the external network through a mounting structure. According to the utility model, two temperature measuring structures are simultaneously arranged on one group of thermocouples, so that the simultaneous temperature measurement of one group of thermocouples is realized, the number of thermocouples is reduced, and the installation difficulty of the thermocouples is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of thermocouples, in particular to a thermocouple suitable for a regenerator of a propane dehydrogenation device. Background Art

[0002] In the propane dehydrogenation reaction, under the action of the catalyst, the hydrogen atoms in propane are removed to form propylene molecules. This process is an endothermic reaction, so it requires continuous energy input; the propane dehydrogenation reaction is usually carried out under high temperature and high pressure conditions, with a specific temperature range of about 600°C and a pressure between 1-2MPa; therefore, during the propane dehydrogenation reaction, it is necessary to monitor the temperature of the reaction materials and the catalyst in real time to ensure the normal progress of the propane dehydrogenation reaction. The existing propane dehydrogenation device regenerator has a two-layer structure of an inner network and an outer network. The material to be reacted, propane, is passed between the inner network, and the catalyst required for the propane dehydrogenation reaction is filled between the inner network and the outer network. In order to monitor the real-time temperature of the material to be reacted and the catalyst at different positions of the regenerator, it is necessary to set two sets of thermocouples on the inner and outer sides of the inner network to monitor them. However, since the inlet for installing the thermocouple on the regenerator is small, it is difficult to install two sets of thermocouples directly in the regenerator. Therefore, it is necessary to design a thermocouple that can monitor both the material temperature and the catalyst temperature. Utility Model Content

[0003] The utility model overcomes the shortcomings of the prior art and provides a thermocouple suitable for measuring and / or monitoring the temperature of a regenerator of a propane dehydrogenation device.

[0004] The technical purpose of the utility model is achieved through the following technical solutions.

[0005] A propane dehydrogenation temperature measuring thermocouple comprises a mounting flange, a sealing connection structure and a junction box, wherein the junction box is connected to the mounting flange via the sealing connection structure;

[0006] The temperature measuring core is fixed as a whole, so that the temperature measuring point of the temperature measuring core is fixed at the position where the temperature needs to be measured and / or monitored, and a thermocouple positioning cover is set at this position; the thermocouple positioning cover is surrounded by a top plate and three side plates to form a rectangular parallelepiped or cube structure, and a heat dissipation grille that penetrates the top plate is evenly opened on the top plate, and a U-shaped opening is opened in the middle of the side plate opposite to the side opening of the thermocouple positioning cover;

[0007] The temperature measuring core extends through the U-shaped opening, and after being bent to form a curved structure, the temperature measuring point at the rear end of the temperature measuring core is arranged between the inner network and the outer network through the installation structure.

[0008] In the above technical solution, the temperature measuring core is fixed by a thermocouple positioning clamp.

[0009] In the above technical solution, the temperature measuring core is arranged in the protection tube and then fixed by a thermocouple positioning clamp.

[0010] In the above technical solution, the temperature measuring core or the protection tube passes through the U-shaped opening and continues to extend backward.

[0011] In the above technical solution, the installation structure includes a positioning tube and an installation tube. The installation tube passes through the inner network and is arranged between the inner network and the outer network. The positioning tube is arranged in the installation tube. The temperature measuring point at the tail end of the temperature measuring core is inserted into the positioning tube. The position of the temperature measuring point is set according to actual temperature measurement needs.

[0012] In the above technical solution, the thermocouple positioning cover adopts a cube structure with a side length of 30-50 mm, preferably 40 mm.

[0013] In the above technical solution, the temperature measuring core adopts an armored thermocouple, such as a single multi-point armored thermocouple.

[0014] In the above technical scheme, the sealing connection structure includes a sealing tube, a pressure measuring assembly and a protective through-tube. One end of the sealing tube is connected to the mounting flange. A pressure measuring hole penetrating the sealing tube is opened on the sealing tube. A pressure measuring assembly is arranged on the outer wall of the sealing tube at the pressure measuring hole. The pressure measuring assembly includes a pressure detection tube seat, a bellows stop valve and a pressure gauge. The pressure detection tube seat is installed on the outer wall of the sealing tube at the pressure measuring hole. The pressure detection tube seat and the sealing cavity in the sealing tube are sealed by a thread plug. The bellows stop valve and the pressure gauge are installed on the pressure detection tube seat from bottom to top in sequence; a protective through-tube is arranged at the other end of the sealing tube, and a head connecting tube welding plate is integrally arranged at one end of the protective through-tube, and a junction box is installed on the other end of the protective through-tube; a sealing cavity upper welding plate is arranged on the sealing tube, and bolt holes are opened on the head connecting tube welding plate and the sealing cavity upper welding plate, and bolts penetrate the bolt holes to connect the protective through-tube with the sealing cavity upper welding plate.

[0015] In the above technical solution, a pressure measuring sealing gasket is arranged between the thread plug and the pressure detection tube seat.

[0016] In the above technical solution, a sealing gasket is provided at the contact point between the welding plate of the coupler connecting tube and the upper welding plate of the sealing cavity.

[0017] Compared with the prior art, the utility model realizes simultaneous temperature measurement of a group of thermocouples by simultaneously arranging the first temperature measuring structure and the second temperature measuring structure on a group of thermocouples, thereby reducing the number of thermocouples to be arranged and reducing the difficulty of installing the thermocouples; in particular, after the temperature measuring core is bent and plugged in through the installation structure, the temperature measuring point at the rear end of the temperature measuring core can measure the temperature between the inner network and the outer network, and there is no need to arrange another group of thermocouples between the inner network and the outer network. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 yes Figure 1 Schematic diagram of the local enlarged structure at point B in the middle.

[0020] Figure 3 It is a structural schematic diagram of a thermocouple positioning cover in the utility model.

[0021] Figure 4 yes Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0022] Figure 5 yes Figure 4 Schematic diagram of the local enlarged structure at point C in the middle.

[0023] In the figure: 1 is a thermocouple positioning cover, 2 is a U-shaped opening, 3 is a heat dissipation grille, 4 is a temperature measuring core, 5 is a grille plate, 6 is an inner network, 7 is an outer network, 8 is a first temperature measuring structure, 9 is a second temperature measuring structure, 10 is a positioning tube, 11 is a mounting tube, 12 is a mounting flange, 13 is a pressure detection tube seat, 14 is a bellows stop valve, 15 is a pressure gauge, 16 is a thread plug, 17 is a pressure measuring gasket, 18 is a welding plate for a coupler connecting tube, 19 is a gasket, 20 is a junction box, 21 is a sealing tube, 22 is a bending structure, 23 is a protective through pipe, 24 is a welding plate on the sealing chamber, 25 is a bolt, 26 is a protective tube, and 27 is a thermocouple positioning clamp.

[0024] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0025] The technical solution of the utility model is further described below through specific embodiments.

[0026] Taking the propane dehydrogenation unit regenerator as an example, combined with Figure 1 As shown in FIG. 5 , a propane dehydrogenation temperature measuring thermocouple comprises a mounting flange 12, a sealing connection structure and a junction box 20, wherein the junction box 20 is connected to the mounting flange 12 via the sealing connection structure;

[0027] The sealing connection structure adopts the sealing structure in the field of thermocouples, which is used to connect the mounting flange and the junction box, and to provide a sealing space for the temperature measuring core or the thermocouple wire to realize the transmission of the temperature measuring signal and prevent the outflow of the material in the reaction device. The sealing connection structure includes a sealing tube 21, a pressure measuring assembly and a protective through pipe 23. One end of the sealing tube 21 is connected to the mounting flange 12. A pressure measuring hole penetrating the sealing tube 21 is provided on the sealing tube 21. A pressure measuring assembly is provided on the outer wall of the sealing tube 21 at the pressure measuring hole. The pressure measuring assembly includes a pressure detection tube seat 13, a bellows stop valve 14 and a pressure gauge 15. The pressure detection tube seat 13 is installed on the outer wall of the sealing tube 21 at the pressure measuring hole. The pressure detection tube seat 13 and the sealing inside the sealing tube 21 are sealed by a wire plug 16. The sealing cavity is sealed, and the bellows stop valve 14 and the pressure gauge 15 are installed on the pressure detection tube seat 13 from bottom to top in sequence, and a pressure measuring sealing gasket 17 is arranged between the wire plug 16 and the pressure detection tube seat 13; a protective through-tube 23 is arranged at the other end of the sealing tube 21, and a pair head connecting tube welding plate 18 is integrally arranged at one end of the protective through-tube 23, and a junction box 20 is installed on the other end of the protective through-tube 23; the sealing cavity upper welding plate 24 is arranged on the sealing tube 21, and bolt holes are opened on the pair head connecting tube welding plate 18 and the sealing cavity upper welding plate 24. Bolts 25 penetrate the bolt holes to connect the protective through-tube 23 with the sealing cavity upper welding plate 24, and a sealing gasket 19 is arranged at the contact between the pair head connecting tube welding plate 18 and the sealing cavity upper welding plate 24.

[0028] Taking into account the need to measure and / or monitor the temperature at multiple locations along the axial direction (i.e., the length direction) of the regenerator reaction device, the temperature measuring core 4 generally selects a single multi-point armored thermocouple core. One thermocouple often requires multiple temperature measuring cores 4 to achieve temperature measurement and / or monitoring of multiple locations (including the length direction and the circumferential direction) in the regenerator reaction device of the entire propane dehydrogenation device.

[0029] The propane dehydrogenation unit regenerator includes an inner network and an outer network. A grid plate 5 is provided between the inner network 6 and the outer network 7 according to actual conditions. The grid plate 5 is often provided and / or fixedly installed close to the inner network according to actual conditions. During operation, temperature measurement and / or monitoring is required between the inner network and the outer network, as well as in the space enclosed by the inner network.

[0030] In order to meet the needs of temperature measurement and / or monitoring at the above two locations, the thermocouples of the utility model respectively adopt a wall-mounted use structure to form a first temperature measurement structure 8 and a second temperature measurement structure 9, as follows:

[0031] The first temperature measuring structure 8 measures and / or monitors the temperature between the inner network and the outer network, selects the temperature at the grid plate, and after the temperature measuring core 4 is bent to form a curved structure 22, the temperature measuring point at the tail end of the temperature measuring core 4 is set between the inner network and the outer network through the inner network and the mounting structure. The mounting structure includes a positioning tube 10 and a mounting tube 11. The mounting tube 11 passes through the inner network and is set between the inner network and the outer network, such as on the grid plate 5. The positioning tube 10 is set in the mounting tube 11, and the temperature measuring point at the tail end of the temperature measuring core 4 is inserted into the positioning tube 10. The specific position of the temperature measuring point is set according to the actual temperature measurement needs.

[0032] The temperature measuring core 4 is installed and fixed by a thermocouple positioning clamp 27 .

[0033] The second temperature measuring structure 9 measures and / or monitors the temperature in the space surrounded by the inner net, selects the temperature at the inner net close to the grid plate, and fixes the temperature measuring core body by means of a thermocouple positioning clamp 27. Preferably, the temperature measuring core body 4 is arranged in a protective tube 26, and then fixed as a whole by means of a thermocouple positioning clamp 27. By fixing the temperature measuring core body or the protective tube, the temperature measuring point of the temperature measuring core body is fixed at the position where the temperature needs to be measured and / or monitored, and a thermocouple positioning cover 1 is arranged at this position, that is, the thermocouple positioning cover 1 is arranged one-to-one with the temperature measuring point of the temperature measuring core body 4.

[0034] The thermocouple positioning cover 1 is formed of a top plate and three side plates to form a rectangular or cube structure. A heat dissipation grille 3 that penetrates the top plate is evenly opened on the top plate. A U-shaped opening 2 is opened in the middle of the side plate opposite to the side opening of the thermocouple positioning cover 1. The temperature measuring core 4 or the protection tube 26 continues to extend backward through the above-mentioned U-shaped opening 2. While the thermocouple positioning cover is positioned and fixed, the temperature at the temperature measuring point is gathered, so that the temperature measuring structure located in the thermocouple positioning cover can accurately measure the temperature at this place; in order to facilitate the temperature exchange in the thermocouple positioning cover, a heat dissipation grille is set on the top plate of the thermocouple positioning cover, and the temperature in the thermocouple positioning cover can be dissipated through the heat dissipation grille.

[0035] The thermocouple positioning cover 1 preferably adopts a cube structure, and the side length of the thermocouple positioning cover 1 is 40 mm.

[0036] Before installation, the number and position of the first temperature measurement structure 8 and the second temperature measurement structure 9 are determined according to design requirements, and according to design requirements, a single multi-point armored thermocouple temperature measurement core body that is suitable therefor is selected as the temperature measurement core body 4 for installation and use. First, the temperature measurement core body 4 with the protective tube 26 is set at the position where temperature measurement is required (corresponding to the second temperature measurement structure), and then the thermocouple positioning cover 1 is installed at the temperature measurement position, and then the temperature measurement core body 4 extending out of the protective tube 26 is bent according to the design position of the first temperature measurement structure 8, and the temperature measurement point at the tail end of the temperature measurement core body 4 is inserted into the positioning tube 10 and the specific position of this temperature measurement point between the inner network and the outer network can be set according to design requirements. In this way, when the overall equipment is in operation, the temperature between the inner network and the outer network, as well as the space surrounded by the inner network can be measured and / or monitored through this thermocouple.

[0037] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship between an element or feature shown in the figure and another element or feature. It should be understood that, in addition to the orientation shown in the figure, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or located in other orientations), and the spatial relative description used here can be interpreted accordingly. Moreover, relational terms such as "first" and "second" are only used to distinguish one from another component with the same name, and do not necessarily require or imply that there is any such actual relationship or order between these components.

[0038] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be done by other technical personnel in this field without expending creative labor falls within the protection scope of the present invention.

Claims

1. A propane dehydrogenation temperature measuring thermocouple, characterized in that: It includes a mounting flange, a sealing connection structure and a junction box, wherein the junction box is connected to the mounting flange through the sealing connection structure; The temperature measuring core is fixed as a whole, so that the temperature measuring point of the temperature measuring core is fixed at the position where the temperature needs to be measured and / or monitored, and a thermocouple positioning cover is set at this position; the thermocouple positioning cover is surrounded by a top plate and three side plates to form a rectangular parallelepiped or cube structure, and a heat dissipation grille that penetrates the top plate is evenly opened on the top plate, and a U-shaped opening is opened in the middle of the side plate opposite to the side opening of the thermocouple positioning cover; The temperature measuring core extends through the U-shaped opening, and after being bent to form a curved structure, the temperature measuring point at the rear end of the temperature measuring core is arranged between the inner network and the outer network through the installation structure.

2. A propane dehydrogenation temperature measuring thermocouple according to claim 1, characterized in that: The installation structure includes a positioning tube and an installation tube. The installation tube passes through the inner network and is arranged between the inner network and the outer network. The positioning tube is arranged in the installation tube. The temperature measuring point at the tail end of the temperature measuring core is inserted into the positioning tube. The position of the temperature measuring point is set according to actual temperature measurement needs.

3. A propane dehydrogenation temperature measuring thermocouple according to claim 1 or 2, characterized in that: The temperature measuring core is fixed by a thermocouple positioning clamp.

4. A propane dehydrogenation temperature measuring thermocouple according to claim 1 or 2, characterized in that: The temperature measuring core is placed in the protective tube and then fixed by a thermocouple positioning clamp.

5. A propane dehydrogenation temperature measuring thermocouple according to claim 4, characterized in that: The temperature measuring core or the protection tube passes through the U-shaped opening and continues to extend backward.

6. A propane dehydrogenation temperature measuring thermocouple according to claim 1 or 2, characterized in that: The thermocouple positioning cover adopts a cube structure with a side length of 30-50mm.

7. A propane dehydrogenation temperature measuring thermocouple according to claim 3, characterized in that: The thermocouple positioning cover adopts a cube structure with a side length of 30-50mm.

8. A propane dehydrogenation temperature measuring thermocouple according to claim 4, characterized in that: The thermocouple positioning cover adopts a cube structure with a side length of 30-50mm.

9. A propane dehydrogenation temperature measuring thermocouple according to claim 5, characterized in that: The thermocouple positioning cover adopts a cube structure with a side length of 30-50mm.

10. A propane dehydrogenation temperature measuring thermocouple according to claim 1 or 2, characterized in that: The temperature measuring core adopts an armored thermocouple.

11. A propane dehydrogenation temperature measuring thermocouple according to claim 10, characterized in that: The armored thermocouple is a single-branch multi-point armored thermocouple.

12. A propane dehydrogenation temperature measuring thermocouple according to claim 3, characterized in that: The temperature measuring core adopts an armored thermocouple.

13. A propane dehydrogenation temperature measuring thermocouple according to claim 12, characterized in that: The armored thermocouple is a single-branch multi-point armored thermocouple.

14. A propane dehydrogenation temperature measuring thermocouple according to claim 4, characterized in that: The temperature measuring core adopts an armored thermocouple.

15. A propane dehydrogenation temperature measuring thermocouple according to claim 14, characterized in that: The armored thermocouple is a single-branch multi-point armored thermocouple.

16. A propane dehydrogenation temperature measuring thermocouple according to claim 5, characterized in that: The temperature measuring core adopts an armored thermocouple.

17. A propane dehydrogenation temperature measuring thermocouple according to claim 16, characterized in that: The armored thermocouple is a single-branch multi-point armored thermocouple.

18. A propane dehydrogenation temperature measuring thermocouple according to claim 1 or 2, characterized in that: A sealing connection structure comprises a sealing tube, a pressure measuring assembly and a protection through-tube. One end of the sealing tube is connected to the mounting flange. A pressure measuring hole penetrating the sealing tube is provided on the sealing tube. A pressure measuring assembly is arranged on the outer wall of the sealing tube at the pressure measuring hole. The pressure measuring assembly comprises a pressure detection tube seat, a bellows stop valve and a pressure gauge. The pressure detection tube seat is installed on the outer wall of the sealing tube at the pressure measuring hole. The pressure detection tube seat and the sealing cavity in the sealing tube are sealed by a thread plug. The bellows stop valve and the pressure gauge are sequentially installed on the pressure detection tube seat from bottom to top. A protection through-tube is arranged at the other end of the sealing tube. A pair-head connecting tube welding plate is integrally provided at one end of the protection through-tube. A junction box is installed on the other end of the protection through-tube. A sealing cavity upper welding plate is arranged on the sealing tube. Bolt holes are provided on the pair-head connecting tube welding plate and the sealing cavity upper welding plate. Bolts penetrate through the bolt holes to connect the protection through-tube with the sealing cavity upper welding plate.

19. A propane dehydrogenation temperature measuring thermocouple according to claim 18, characterized in that: A pressure measuring sealing gasket is arranged between the thread plug and the pressure testing tube seat.

20. A propane dehydrogenation temperature measuring thermocouple according to claim 18 or 19, characterized in that: A sealing gasket is arranged at the contact point between the welding plate of the coupler connecting tube and the upper welding plate of the sealing cavity.

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