Furnace tube wall temperature measuring structure of molten salt heat carrier heating furnace
By opening holes in the side wall of the molten salt heat carrier heating furnace shell and installing sealing components, the problems of complex temperature measurement structures and flue gas leakage in the prior art are solved, achieving the effects of simplified manufacturing, reduced costs and improved temperature measurement accuracy.
Patent Information
- Application Number
- CN202520599017.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-01
AI Technical Summary
The existing temperature measurement structure of molten salt heat carrier heaters is cumbersome to manufacture and complex to install, and there is a risk of flue gas leakage, making it difficult to guarantee temperature measurement accuracy and equipment operation reliability.
A hole is made in the side wall of the shell, through which the temperature sensor probe passes and abuts against the outside of the furnace tube. A seal is installed at the gap between the furnace tubes, using a sealing structure made of ceramic fiber blanket and steel plate to eliminate the expansion displacement of the furnace tubes and reduce the diameter of the hole to prevent flue gas leakage.
It simplifies manufacturing and installation, reduces costs, improves temperature measurement accuracy and equipment sealing performance, prevents flue gas leakage, and ensures long-term safe operation of the equipment.
Smart Images
Figure CN223955036U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to an organic heat carrier heating furnace for industrial heat exchange especially to a molten salt heat carrier heating furnace tube wall temperature measuring structure belongs to industrial boiler technical field. BACKGROUND
[0002] Due to the improvement of national environmental protection emission requirement, the application of organic heat carrier heating furnace is more and more extensive, and the heat carrier used in the heating furnace mainly includes heat conducting oil, diphenyl, molten salt and the like. The molten salt is widely used as the heat carrier of the heating furnace due to its low viscosity, low cost, long service life and high thermal efficiency and the like.
[0003] Due to the characteristics of the molten salt, the molten salt heat carrier heating furnace must be emptied from the furnace when it is shut down, so that the molten salt heat carrier heating furnace mostly adopts a cylindrical vertical structure, and two to three layers of closely adhered vertical spiral furnace pipes are arranged inside as the heating surface. Since the molten salt will solidify from liquid state when it is below 200 degrees, the molten salt needs to be preheated and melted before the heating furnace is operated, and the furnace pipe in the heating furnace needs to be preheated to exceed its solidification temperature before the molten salt is input. The furnace pipe of the molten salt heat carrier heating furnace must have a pipe wall temperature measurement during the working process, and the pipe wall temperature is usually detected by a temperature measuring tube. Since the temperature measuring tube is relatively brittle and easy to break, a protective sleeve is usually made to protect the temperature measuring tube, the protective sleeve is welded to the outer wall of the furnace pipe, and the temperature measuring tube is inserted into the protective sleeve for temperature measurement. However, when the molten salt heat carrier heating furnace is running, the protective sleeve and the temperature measuring tube will have a large change in the vertical direction due to the thermal expansion of the furnace pipe, so that the technical personnel usually open a large through hole on the side wall of the heating furnace shell, place a sealing seat in the through hole, fill the sealing seat with high-temperature-resistant insulation cotton, and let the temperature measuring tube move up and down in the sealing seat to prevent the temperature measuring tube from being damaged due to the expansion of the furnace pipe. However, this temperature measuring structure has the disadvantages of high and complicated manufacturing requirements, and smoke leakage to the outside of the furnace due to slight installation errors or long-term use. SUMMARY
[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art, and to provide a molten salt heat carrier heating furnace tube wall temperature measuring structure which is convenient to manufacture and install, low in cost, can better prevent smoke leakage, and simple in structure and reliable in operation.
[0005] In order to solve the above technical problems, the utility model discloses a kind of molten salt heat carrier heating furnace tube wall temperature measuring structure, including cylindrical shell, furnace top cover being fixedly installed at the top of the shell, bottom plate being fixedly installed at the bottom of the shell, combustor being fixedly installed on the furnace top cover, temperature sensor and the vertical spiral furnace tube of being installed in the inner cavity of the shell, a hole portion is opened on the side wall of the shell, the probe of the temperature sensor passes through the hole portion and is in contact with the temperature measuring furnace tube outer side wall for detecting the temperature of the tube wall in furnace tube, first gap is arranged between at least one adjacent furnace tube above the temperature measuring furnace tube, first sealing element is installed at the first gap, second gap is arranged between at least one adjacent furnace tube below the temperature measuring furnace tube, and second sealing element is installed at the second gap.
[0006] As a preferred embodiment of the utility model, first gap is arranged between first upper ring furnace tube and second upper ring furnace tube above the temperature measuring furnace tube, first sealing element is installed at the first gap, second gap is arranged between first lower ring furnace tube and second lower ring furnace tube below the temperature measuring furnace tube, and second sealing element is installed at the second gap.
[0007] As a preferred embodiment of the utility model, the first sealing element includes first steel plate, first ceramic fiber blanket and first nail, the upper end of the first steel plate is fixedly installed on the outer side wall of the second upper ring furnace tube, the lower end of the first steel plate is free end, the first ceramic fiber blanket is filled in the first gap, and the first ceramic fiber blanket is fixedly connected with the first steel plate by the first nail;The second sealing element includes second steel plate, second ceramic fiber blanket and second nail, the lower end of the second steel plate is fixedly installed on the outer side wall of the second lower ring furnace tube, the upper end of the second steel plate is free end, the second ceramic fiber blanket is filled in the second gap, and the second ceramic fiber blanket is fixedly connected with the second steel plate by the second nail.
[0008] As a preferred embodiment of the utility model, a sleeve is fixedly installed in the hole portion, internal thread section is arranged on the outer end of the sleeve, the temperature sensor is thermistor temperature sensor, bolt connection head is arranged on the temperature sensor, the temperature sensor is inserted into the inner cavity of the sleeve and is threadedly connected with the internal thread section of the sleeve by the bolt connection head.
[0009] After adopting the above structure, the utility model has the following beneficial effects:
[0010] The utility model discloses a hole part is set up on the lateral wall of shell, and the probe of temperature sensor passes through the hole part and is in abutment with the outside tube wall of temperature measuring furnace tube, and the first gap is arranged between at least one adjacent furnace tube above the temperature measuring furnace tube, and the first sealing piece is installed at the first gap, and the second gap is arranged between at least one adjacent furnace tube below the temperature measuring furnace tube, and the second sealing piece is installed at the second gap. Such structure, on one hand, when the molten salt heat carrier heating furnace is running, the expansion amount of the furnace tube that is heated and expands is all absorbed or said eliminated by the first gap and the second gap, so that the temperature measuring furnace tube will not produce displacement because of thermal expansion or the displacement produced is extremely small, and even if the extremely small displacement is produced, it has no influence on the temperature measuring furnace tube, and will not cause damage to it, on the other hand, the hole part that the utility model discloses is set up on the lateral wall of shell, and the purpose is only for the probe of temperature sensor to pass through, so the aperture is greatly reduced compared with the prior art, thereby better preventing the flue gas from leaking to the outside of the furnace, the utility model discloses simple structure, convenient to make, convenient to install, low in manufacturing cost, reliable in operation, and greatly improves the sealing performance and measurement accuracy of the heating furnace.
[0011] The utility model discloses a sleeve is fixedly installed in the hole part, and the internal thread section is equipped on the outer end of sleeve, and the temperature sensor preferably adopts the thermistor temperature sensor, and the bolt connection head is equipped on the temperature sensor, and the temperature sensor is inserted into the inner chamber of sleeve and is connected with the internal thread section through bolt connection head. Such structure, can prevent flue gas from leaking to the outside of the furnace completely, and is very convenient to install, and the sealing performance is excellent, and guarantees the long -term safe operation of equipment. DRAWINGS
[0012] The specific embodiment of the utility model is further explained in detail below in combination with the drawings.
[0013] Figure 1 It is a structure schematic view of the utility model discloses molten salt heat carrier heating furnace furnace tube wall temperature measuring structure.
[0014] Figure 2 It is Figure 1 It is the enlarged schematic view of the installation structure of temperature sensor and shell and furnace tube. CONCRETE IMPLEMENTING METHOD
[0015] See Figure 1 、 2The temperature measuring structure of the furnace tube wall of a molten salt heat carrier heating furnace is characterized by comprising a cylindrical shell 1, a furnace top cover 2 fixedly installed on the top of the shell 1, a bottom plate 3 fixedly installed on the bottom of the shell 1, a burner 4 fixedly installed on the furnace top cover 2, a temperature sensor 5, and a vertical spiral furnace tube 6 installed in the inner cavity of the shell 1, wherein one end of the furnace tube 6 is fixed on the bottom plate 3 or the furnace top cover 2, and the other end is a free end, a hole part 1-1 is formed in the side wall of the shell 1, the probe 5-1 of the temperature sensor 5 is in abutment with the outer wall of the temperature measuring furnace tube 6a for detecting the tube wall temperature through the hole part 1-1, a first gap A is arranged between at least one adjacent furnace tube above the temperature measuring furnace tube 6a, a first sealing element is installed at the first gap A, a second gap B is arranged between at least one adjacent furnace tube below the temperature measuring furnace tube 6a, and a second sealing element is installed at the second gap B.
[0016] As a preferred embodiment of the utility model, as shown in the description, Figure 1 , 2 A first gap A is arranged between the first upper ring furnace tube 6-1 and the second upper ring furnace tube 6-2 above the temperature measuring furnace tube 6a, a first sealing element is installed at the first gap A, a second gap B is arranged between the first lower ring furnace tube 6-3 and the second lower ring furnace tube 6-4 below the temperature measuring furnace tube 6a, and a second sealing element is installed at the second gap B.
[0017] As a preferred embodiment of the utility model, as shown in the description, Figure 1 , 2As shown, the first sealing member comprises a first steel plate 7, a first ceramic fiber blanket 8 and a first nail 9, the upper end of the first steel plate 7 is fixedly installed on the outer wall of the second upper ring furnace tube 6-2 by welding, the lower end of the first steel plate 7 is a free end, the first ceramic fiber blanket 8 is filled in the first gap A, and the first ceramic fiber blanket 8 is fixedly connected with the first steel plate 7 through the first nail 9; the second sealing member comprises a second steel plate 10, a second ceramic fiber blanket 11 and a second nail 12, the lower end of the second steel plate 10 is fixedly installed on the outer wall of the second lower ring furnace tube 6-4 by welding, the upper end of the second steel plate 10 is a free end, the second ceramic fiber blanket 11 is filled in the second gap B, and the second ceramic fiber blanket 11 is fixedly connected with the second steel plate 10 through the second nail 12. The first steel plate 7 and the second steel plate 10 of the utility model are preferably made of heat-resistant stainless steel plate. In the utility model, the first sealing member and the second sealing member can also adopt other structures, for example, only ceramic fiber blankets are used, and in implementation, the ceramic fiber blankets are installed between the first upper ring furnace tube 6-1 and the second upper ring furnace tube 6-2 and between the first lower ring furnace tube 6-3 and the second lower ring furnace tube 6-4.
[0018] As a preferred embodiment of the utility model, as Figure 2 As shown, a sleeve 13 is fixedly installed in the hole part 1-1, the material of the sleeve 13 is preferably stainless steel, the sleeve 13 is preferably fixedly installed in the hole part 1-1 by welding, an inner threaded section is arranged at the outer end of the sleeve 13, the temperature sensor 5 is a thermal resistance temperature sensor, a bolt connection head 5-2 is arranged on the temperature sensor 5, the temperature sensor 5 is inserted into the inner cavity of the sleeve 13 and is threadedly connected with the inner threaded section of the sleeve 13 through the bolt connection head 5-2, the probe 5-1 of the temperature sensor 5 contacts the outer wall of the measuring furnace tube 6a to accurately measure the temperature, and there is no flue gas leakage.
[0019] After trial, the utility model can be well applied to the furnace tube wall temperature measurement of a molten salt heat carrier heating furnace, the temperature measurement is accurate and reliable, the temperature sensor is not damaged, there is no flue gas leakage, and good practical effects are achieved.
Claims
1. A temperature measuring structure for the wall of a molten salt heat carrier heating furnace tube, comprising a cylindrical shell (1), a furnace top cover (2) fixedly installed on the top of the shell (1), a bottom plate (3) fixedly installed on the bottom of the shell (1), a burner (4) fixedly installed on the furnace top cover (2), a temperature sensor (5), and a vertical spiral furnace tube (6) installed in the inner cavity of the shell (1), characterized in that: A hole (1-1) is provided on the side wall of the housing (1). The probe (5-1) of the temperature sensor (5) passes through the hole (1-1) and abuts against the outer wall of the temperature measuring furnace tube (6a) used to detect the tube wall temperature in the furnace tube (6). A first gap (A) is provided between at least one adjacent furnace tube above the temperature measuring furnace tube (6a), and a first seal is installed at the first gap (A). A second gap (B) is provided between at least one adjacent furnace tube below the temperature measuring furnace tube (6a), and a second seal is installed at the second gap (B).
2. The temperature measurement structure for the furnace tube wall of the molten salt heat carrier heating furnace according to claim 1, characterized in that: A first gap (A) is provided between the first upper ring furnace tube (6-1) and the second upper ring furnace tube (6-2) above the temperature measuring furnace tube (6a), and a first sealing element is installed at the first gap (A). A second gap (B) is provided between the first lower ring furnace tube (6-3) and the second lower ring furnace tube (6-4) below the temperature measuring furnace tube (6a), and a second sealing element is installed at the second gap (B).
3. The temperature measurement structure for the furnace tube wall of the molten salt heat carrier heating furnace according to claim 2, characterized in that: The first sealing element includes a first steel plate (7), a first ceramic fiber blanket (8), and a first clamp (9). The upper end of the first steel plate (7) is fixedly installed on the outer wall of the second upper ring furnace tube (6-2). The lower end of the first steel plate (7) is a free end. The first ceramic fiber blanket (8) is filled in the first gap (A), and the first ceramic fiber blanket (8) is fixedly connected to the first steel plate (7) through the first clamp (9). The second sealing element includes a second steel plate (10), a second ceramic fiber blanket (11), and a second clamp (12). The lower end of the second steel plate (10) is fixedly installed on the outer wall of the second lower ring furnace tube (6-4). The upper end of the second steel plate (10) is a free end. The second ceramic fiber blanket (11) is filled in the second gap (B), and the second ceramic fiber blanket (11) is fixedly connected to the second steel plate (10) through the second clamp (12).
4. The temperature measurement structure for the furnace tube wall of a molten salt heat carrier heating furnace according to claim 1, 2, or 3, characterized in that: A sleeve (13) is fixedly installed inside the hole (1-1). An internal thread section is provided at the outer end of the sleeve (13). The temperature sensor (5) is a resistance temperature sensor. A bolt connector (5-2) is provided on the temperature sensor (5). The temperature sensor (5) is inserted into the inner cavity of the sleeve (13) and is threadedly connected to the internal thread section of the sleeve (13) through the bolt connector (5-2).