A dual-flame detection device for a molten salt furnace

Abstract

This utility model relates to the field of molten salt furnace technology, and in particular to a dual flame detection device for molten salt furnaces. The device includes a furnace body, a first observation hole on one side of the furnace body, and a second observation hole on the other side. A flame detection phototube is inserted into the first observation hole, and a flame detection assembly is inserted into the second observation hole. An adjustment assembly is located below the flame detection assembly. The flame detection assembly includes a flame detection probe, one end of which is fixedly connected to a flame detection tube. The flame detection tube includes an innermost flame detection optical fiber, a high-density ceramic tube on the outer side of the flame detection optical fiber, and a stainless steel sleeve on the outer side of the high-density ceramic tube. The outer surface of the flame detection optical fiber and the inner surface of the high-density ceramic tube are fixedly bonded together with adhesive. This utility model uses dual flame detection to prevent the small flame detection area caused by a single flame detection using only the flame detection phototube, and the instability of the system caused by the flame detection phototube being easily damaged by high temperatures and failing to detect flameout.

Description

Technical Field

[0001] This utility model relates to the field of molten salt furnace technology, specifically a dual-flame detection device for molten salt furnaces. Background Technology

[0002] A molten salt furnace is a high-temperature heating device that uses molten salt as a heat transfer medium. It is widely used in the production of fertilizer materials such as urea. Its core working principle is to heat solid salt (usually a mixture of sodium nitrate, potassium nitrate, etc.) to above its melting point, so that it melts into a liquid state and forms high-temperature molten salt. The molten salt is then transported to the heat-using equipment through a circulating pump, providing stable and uniform heat for the process. Molten salt furnaces have the advantages of high heat transfer efficiency, precise temperature control, and safe and reliable operation.

[0003] Molten salt furnaces are particularly suitable for industrial scenarios that require high temperatures and continuous heating. In chemical production, molten salt furnaces are often used to provide heat sources for equipment such as reaction vessels, distillation towers, and dryers to ensure that chemical reactions take place at suitable temperatures. With the continuous advancement of industrial technology, the advantages of molten salt furnaces in energy conservation, environmental protection, and efficient heat transfer have become increasingly prominent, making them one of the indispensable and important pieces of equipment in modern industry.

[0004] The molten salt furnace is operated by a PLC control system. The flame detection system is an important detection element of the burner. In the entire control system, the flame detection phototube is unstable during use and is prone to flameout. The flame detection phototube detects the flame through the observation hole of the burner, but the flame detection area of ​​the flame detection phototube is small and the flame detection phototube is easily damaged by high temperature, which makes it impossible to detect flameout and causes system instability. Therefore, a dual flame detection device for molten salt furnace is proposed to address the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a dual-flame detection device for a molten salt furnace to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A dual flame detection device for a molten salt furnace includes a furnace body. A first observation hole is provided on one side of the furnace body, and a second observation hole is provided on the other side of the furnace body. A flame detection phototube is inserted into the first observation hole, and a flame detection assembly is inserted into the second observation hole. An adjustment assembly is provided below the flame detection assembly. The flame detection assembly includes a flame detection probe. One end of the flame detection probe is fixedly connected to a flame detection tube. The flame detection tube includes an innermost flame detection optical fiber. A high-density ceramic tube is provided on the outer side of the flame detection optical fiber. A stainless steel sleeve is provided on the outer side of the high-density ceramic tube. The outer surface of the flame detection optical fiber and the inner surface of the high-density ceramic tube are fixedly bonded together by adhesive.

[0008] As a further optimization of this utility model, a gap is provided between the high-density ceramic tube and the stainless steel sleeve, and the gap between the high-density ceramic tube and the stainless steel sleeve is filled with alumina insulation cotton.

[0009] As a further optimization of this utility model, the adjustment component includes an adjustment box, one end of which is fixedly connected to the side wall of the furnace body, and the adjustment box is located directly below the flame detection component.

[0010] As a further optimization of this utility model, the front wall of the adjustment box is provided with scale lines, the inner cavity of the adjustment box is provided with a lead screw, and the two ends of the lead screw are respectively rotatably connected to the inner side wall of the adjustment box.

[0011] As a further optimization of this utility model, a handwheel is provided on the side of the adjustment box away from the furnace body. A transmission rod is fixedly connected to the center of the side of the handwheel near the adjustment box. The end of the transmission rod away from the handwheel passes through the side wall of the adjustment box and is fixedly connected to the end of the lead screw.

[0012] As a further optimization of this utility model, the following features are provided: a threaded block is threaded through and threaded to the outer side of the lead screw; the threaded block is slidably connected to the inner wall of the adjustment box; a connecting block is fixedly connected to the top of the threaded block; and a through groove is provided on the top of the adjustment box.

[0013] As a further optimization of this utility model, the top of the connecting block extends to the top of the adjustment box through a through groove, and a transmission sleeve is fixedly connected to the top of the connecting block. The transmission sleeve is fitted onto the end of the fire detector tube away from the fire detector probe.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, the furnace body can be flame-detected through the first observation hole and the flame detection phototube. The furnace body can be provided with secondary flame detection capability through the second observation hole and the flame detection component. The dual flame detection prevents the problem of small flame detection area caused by single flame detection through the flame detection phototube, and the instability of the system caused by the flame detection phototube being easily damaged by high temperature and unable to detect flameout. The position of the flame detection component can be adjusted by the adjustment component to precisely control the depth of the flame detection component into the furnace body, so as to adapt to the changes in flame position under different combustion conditions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0018] Figure 3 This is a cross-sectional view of the furnace body of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the fire detection assembly of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the adjustment component of this utility model;

[0021] Figure 6 This is a cross-sectional view of the adjustment component of this utility model.

[0022] In the diagram: 1. Furnace body; 2. First observation hole; 3. Second observation hole; 4. Flame detection photoelectric tube; 5. Flame detection assembly; 51. Flame detection probe; 52. Flame detection tube; 521. Flame detection fiber optic cable; 522. High-density ceramic tube; 523. Stainless steel sleeve; 524. Alumina insulation cotton; 6. Adjustment assembly; 61. Adjustment box; 62. Scale line; 63. Lead screw; 64. Handwheel; 65. Transmission rod; 66. Threaded block; 67. Connecting block; 68. Through groove; 69. Transmission sleeve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] Please see Figures 1-6 This utility model provides a technical solution:

[0026] A dual flame detection device for a molten salt furnace includes a furnace body 1. A first observation hole 2 is provided on one side of the furnace body 1, and a second observation hole 3 is provided on the other side of the furnace body 1. A flame detection photoelectric tube 4 is inserted into the first observation hole 2, and a flame detection component 5 is inserted into the second observation hole 3. An adjustment component 6 is provided below the flame detection component 5. The flame detection component 5 includes a flame detection probe 51. One end of the flame detection probe 51 is fixedly connected to a flame detection tube 52. The flame detection tube 52 includes an innermost flame detection optical fiber 521. A high-density ceramic tube 522 is provided on the outer side of the flame detection optical fiber 521. A stainless steel sleeve 523 is provided on the outer side of the high-density ceramic tube 522. The outer surface of the flame detection optical fiber 521 and the inner surface of the high-density ceramic tube 522 are fixedly bonded together by adhesive.

[0027] As a further implementation of this solution, a gap is provided between the high-density ceramic tube 522 and the stainless steel sleeve 523, and the gap between the high-density ceramic tube 522 and the stainless steel sleeve 523 is filled with alumina heat insulation cotton 524. The above arrangement can provide an excellent protective carrier for the flame detection optical fiber 521.

[0028] As a further implementation of this solution, the adjustment assembly 6 includes an adjustment box 61. One end of the adjustment box 61 is fixedly connected to the side wall of the furnace body 1, and the adjustment box 61 is located directly below the flame detector assembly 5. The front wall of the adjustment box 61 is provided with a scale line 62. The inner cavity of the adjustment box 61 is provided with a lead screw 63. The two ends of the lead screw 63 are respectively rotatably connected to the inner side wall of the adjustment box 61. A handwheel 64 is provided on the side of the adjustment box 61 away from the furnace body 1. A transmission rod 65 is fixedly connected to the center of the handwheel 64 near the adjustment box 61. The end of the transmission rod 65 away from the handwheel 64 passes through the side wall of the adjustment box 61 and is fixed to the end of the lead screw 63. A threaded block 66 is threaded through and threaded onto the outer side of the lead screw 63. The threaded block 66 is slidably connected to the inner wall of the adjusting box 61. A connecting block 67 is fixedly connected to the top of the threaded block 66. A through groove 68 is provided on the top of the adjusting box 61. The top of the connecting block 67 extends above the adjusting box 61 through the through groove 68. A transmission sleeve 69 is fixedly connected to the top of the connecting block 67. The transmission sleeve 69 is fitted on the end of the flame detection tube 52 away from the flame detection probe 51. The above arrangement can adjust the position of the flame detection component 5 and precisely control the depth of the flame detection component 5 inserted into the furnace body 1 to adapt to the changes in flame position under different combustion conditions.

[0029] Work process: First, the flame detection phototube 4 is installed in the first observation hole 2, so that the flame detection phototube 4 extends into the furnace body 1. The flame detection phototube 4 is encapsulated with two metal electrodes. When the ultraviolet light emitted by the flame in the furnace body 1 irradiates the cathode after high voltage is applied, electrons will be excited and formed under the action of electric field, thereby generating a detection signal. However, the flame detection area of ​​the flame detection phototube 4 is small, and the flame detection phototube 4 is easily burned by high temperature and cannot detect flameout, causing system instability. Therefore, it is necessary to cooperate with the flame detection component 5 to form a dual flame detection.

[0030] Adjustment component 6 can adjust the position of flame detection component 5, precisely controlling the depth to which flame detection component 5 extends into furnace body 1 to adapt to changes in flame position under different combustion conditions. Turning handwheel 64 causes it to drive lead screw 63 via transmission rod 65. The rotation of lead screw 63 drives threaded block 66 to move within adjustment box 61 via threads. The movement of threaded block 66 drives connecting block 67 to move within through groove 68. Connecting block 67 then drives flame detection tube 52 and flame detection probe 51 at its end to move synchronously via transmission sleeve 69 until flame detection probe 51 passes through... The second observation hole 3 is moved to a suitable position inside the furnace body 1. The scale line 62 can provide a reference for the insertion depth of the flame detection component 5. The flame detection probe 51 can detect light signals. The light signals emitted by the flame are transmitted to the external flame detector through the flame detection fiber optic cable 521. The detector then analyzes the presence, intensity and stability of the flame, thereby realizing the safety monitoring of the combustion system. The high-density ceramic tube 522, the stainless steel sleeve 523 and the alumina insulation cotton 524 can provide excellent protective carriers for the flame detection fiber optic cable 521 to ensure its service condition.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-flame detection device for a molten salt furnace, comprising a furnace body (1), characterized in that: A first observation hole (2) is provided on one side of the furnace body (1), and a second observation hole (3) is provided on the other side of the furnace body (1). A flame detection phototube (4) is inserted in the first observation hole (2), and a flame detection component (5) is inserted in the second observation hole (3). An adjustment component (6) is provided below the flame detection component (5). The fire detection assembly (5) includes a fire detection probe (51), one end of which is fixedly connected to a fire detection tube (52). The fire detection tube (52) includes an innermost fire detection optical fiber (521), a high-density ceramic tube (522) is provided on the outside of the fire detection optical fiber (521), and a stainless steel sleeve (523) is provided on the outside of the high-density ceramic tube (522). The outer surface of the flame detection optical fiber (521) is fixedly bonded to the inner surface of the high-density ceramic tube (522) by an adhesive.

2. The dual-flame detection device for a molten salt furnace according to claim 1, characterized in that: A gap is provided between the high-density ceramic tube (522) and the stainless steel sleeve (523), and the gap between the high-density ceramic tube (522) and the stainless steel sleeve (523) is filled with alumina insulation cotton (524).

3. The molten salt furnace dual-flame detection device according to claim 1, characterized in that: The adjustment component (6) includes an adjustment box (61), one end of which is fixedly connected to the side wall of the furnace body (1), and the adjustment box (61) is located directly below the flame detector component (5).

4. The molten salt furnace dual-flame detection device according to claim 3, characterized in that: The front wall of the adjustment box (61) is provided with scale lines (62), and the inner cavity of the adjustment box (61) is provided with a lead screw (63). The two ends of the lead screw (63) are respectively rotatably connected to the inner side wall of the adjustment box (61).

5. The molten salt furnace dual-flame detection device according to claim 4, characterized in that: The adjustment box (61) is provided with a handwheel (64) on the side away from the furnace body (1). A transmission rod (65) is fixedly connected to the center of the side of the handwheel (64) near the adjustment box (61). The end of the transmission rod (65) away from the handwheel (64) passes through the side wall of the adjustment box (61) and is fixedly connected to the end of the lead screw (63).

6. The molten salt furnace dual-flame detection device according to claim 4, characterized in that: A threaded block (66) is threaded through and threaded to the outside of the lead screw (63). The threaded block (66) is slidably connected to the inner wall of the adjusting box (61). A connecting block (67) is fixedly connected to the top of the threaded block (66). A through groove (68) is provided on the top of the adjusting box (61).

7. A dual-flame detection device for a molten salt furnace according to claim 6, characterized in that: The top of the connecting block (67) extends above the adjustment box (61) through the through groove (68). A transmission sleeve (69) is fixedly connected to the top of the connecting block (67). The transmission sleeve (69) is sleeved on the end of the fire detector tube (52) away from the fire detector probe (51).

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