In-furnace information detection device and system of smelting furnace

Abstract

The utility model discloses an in-furnace information detection device of a smelting furnace. The in-furnace information detection device comprises an optical fiber gun barrel; the tail end part of the cylindrical pressing cap is in threaded connection with the head end part of the optical fiber gun barrel; the lighting mirror is connected with the optical fiber transmission line and is kept between the optical fiber gun barrel and the pressing cap; the optical fiber gun barrel protection barrel comprises a cooling sleeve and a limiting structure, the cooling sleeve is provided with an inner wall and an outer wall, an interlayer space is formed between the inner wall and the outer wall, the cooling sleeve is provided with an inlet and an outlet which are communicated with the interlayer space, and the limiting structure is arranged at the head end of the cooling sleeve and provided with a center hole. The central bore allows a portion of the press cap to pass therethrough to limit a depth of insertion of the fiber barrel into the fiber barrel protective barrel. During working, cooling gas enters the gas inlet and passes through the gas channel reserved in the limiting structure; cooling liquid can cyclically enter and exit the interlayer space via the inlet and the outlet.

Description

TECHNICAL FIELD

[0001] The present application relates to optical instruments, and in particular to a device and system for detecting information in a smelting furnace. BACKGROUND

[0002] Smelting furnaces have various purposes, for example, a blast furnace is a high-temperature and high-pressure closed iron smelting furnace, and a comprehensive understanding of various process parameters in the furnace is of great significance to guide the production of the smelting furnace. The traditional production indicators in the furnace include temperature, pressure, coal gas composition sampling, material line depth, material surface shape, etc. The temperature of the smelting furnace is a very critical indicator, but the measurement of the temperature is affected by environmental factors and has a certain hysteresis, which affects the judgment of the actual situation. CONTENT OF THE INVENTION

[0003] The present application relates to optical instruments, and in particular to a device and system for detecting information in a smelting furnace.

[0004] According to one aspect of the present application, a device for detecting information in a smelting furnace is provided, comprising: an optical fiber gun barrel, the gun barrel extending along a length direction and having a head end and a tail end opposite along the length direction thereof;

[0005] An optical fiber transmission line for transmitting light spectrum extends from the outside of the gun barrel into the gun barrel;

[0006] A cylindrical compression cap, the tail end of the compression cap being threadedly connected to the head end of the optical fiber gun barrel;

[0007] A light collecting mirror connected to the optical fiber transmission line, the light collecting mirror being held between the optical fiber gun barrel and the compression cap;

[0008] An optical fiber gun barrel protection cylinder, comprising a cooling sleeve having an inner wall and an outer wall with a sandwich space therebetween, the cooling sleeve having an inlet and an outlet in communication with the sandwich space; and

[0009] A limiting structure provided at the head end of the cooling sleeve, the limiting structure being provided with a central hole allowing a portion of the compression cap to pass through to limit the depth of the optical fiber gun barrel inserted into the optical fiber gun barrel protection cylinder.

[0010] Preferably, in operation, cooling gas enters the gas inlet, sweeps the optical fiber barrel, and forms an air channel through the plurality of air holes of the limiting structure.

[0011] Preferably, the limiting structure comprises a support ring and an outer protective cap, the support ring is connected to the outer protective cap by threads, and the outer protective cap is connected to the front end of the cooling sleeve by threads.

[0012] Preferably, a sealing sleeve is provided, the optical fiber barrel is fixed to the tail end of the optical fiber barrel protection cylinder through the sealing sleeve, and a connecting pipe is provided between the sealing sleeve and the cooling sleeve, the connecting pipe partially accommodates the optical fiber barrel, and a gas inlet is formed on the connecting pipe to the inner cavity thereof.

[0013] Preferably, the limiting structure is provided with a central hole located at the center of the support ring, and the support ring is provided with a plurality of air holes.

[0014] Preferably, the tail end of the light collecting mirror has a first step portion, the optical fiber barrel abuts against the first step portion to limit the movement of the light collecting mirror towards the tail end thereof, and the cap has a second step portion in the inner surface thereof, the tail end of the light collecting mirror abuts against the second step portion to limit the movement of the light collecting mirror towards the head end thereof.

[0015] Preferably, the outer surface of the cap has a third step portion formed by a large diameter section and a small diameter section, and the third step portion is chamfered to guide the small diameter section to be inserted into the central hole of the limiting structure.

[0016] Preferably, the outer protective cap has a necked structure, and the plurality of air holes form an air outlet air channel with the necked structure.

[0017] Preferably, the optical fiber barrel protection cylinder has a flange, and the in-furnace information detection device of the smelting furnace further comprises a flange short pipe which can comprise a pipe and a flange fixedly connected to each other, and the flanges are fixedly connected to each other by fasteners.

[0018] Preferably, the gas inlet and the gas outlet are arranged on the side of the flange opposite to the interlayer space and communicate with the interlayer space through the flange, respectively.

[0019] Preferably, one end of the connecting pipe is fixedly connected to the cooling sleeve, and the other end is threadedly connected to the sealing sleeve.

[0020] Preferably, the optical fiber transmission line is one or more optical fibers, and the tail end of the optical fiber transmission line has an FC connector connected to a spectrometer.

[0021] Preferably, the light collecting mirror is connected with the head end of the optical fiber transmission line, so that the light from the smelting furnace is incident to the optical fiber transmission line via the light collecting mirror.

[0022] The application also provides a smelting furnace in-furnace information detection system for a smelting furnace, which is arranged in the smelting furnace and comprises the smelting furnace in-furnace information detection device and a spectrometer connected with the smelting furnace in-furnace information detection device through the optical fiber transmission line, and the spectrometer is in communication connection with a computer.

[0023] Compared with the prior art, the application has the following advantages:

[0024] Through the device, the in-furnace light is transmitted out of the furnace by the optical fiber and analyzed by the optical spectrum analyzer, the water cooling and air cooling structure formed by the optical fiber gun barrel protection cylinder protects the optical fiber from being damaged by the high temperature in the furnace, and the nitrogen gas is used to purge the light collecting lens at the front end of the optical fiber to keep the lens clean and not be polluted by the dust in the furnace. The optical fiber gun barrel is fixed and sealed in the radial and axial directions by the limiting structure and the sealing sleeve. After the light is transmitted into the optical spectrum analyzer outside the furnace by the optical fiber, the data is transmitted into the computer for analysis by the cable, thereby guiding the operation and production of the smelting furnace. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 Fig. 1 shows a first perspective view of the smelting furnace in-furnace information detection device of the application;

[0026] Figure 2 Fig. 2 shows a second perspective view of the smelting furnace in-furnace information detection device of the application;

[0027] Figure 3 Fig. 3 shows an assembly front view of the smelting furnace in-furnace information detection device of the application;

[0028] Figure 4 Fig. 4 shows an assembly sectional view of the smelting furnace in-furnace information detection device of the application;

[0029] Figure 5 Fig. 5 shows an assembly sectional view of the smelting furnace in-furnace information detection device of the application;

[0030] Figure 6 Fig. 6 shows an assembly application view of the smelting furnace in-furnace information detection device of the application. DETAILED DESCRIPTION

[0031] The technical scheme of the application will be described in detail below with reference to the drawings and embodiments.

[0032] As Figure 1As shown, taking a blast furnace as an example, the furnace information detection device 10, used to measure the spectrum inside the blast furnace, can include an optical fiber gun tube 100 and its inserted protective sleeve 200, both of which can be elongated. For simplicity, the following will refer to... Figure 1 The left end is called the tail end, and the right end is called the head end. The fiber optic gun barrel protection sleeve 200 may have an internal cavity extending along its length to receive the inserted fiber optic gun barrel 100. The fiber optic gun barrel 100 can be inserted from the tail end of the fiber optic gun barrel protection sleeve 200 into the fiber optic gun barrel protection sleeve 200 until the head end of the fiber optic gun barrel 100 reaches the head end of the fiber optic gun barrel protection sleeve 200, thereby forming... Figure 1 The image shows an in-furnace information detection device in an assembled state. The tail end of the fiber optic gun tube 100 can be exposed outside the fiber optic gun tube protective sleeve 200, so that the fiber optic gun tube 100 can be easily inserted and pulled out relative to the fiber optic gun tube protective sleeve 200 while holding the tail end. Although the portion of the fiber optic gun tube 100 inserted inside the fiber optic gun tube protective sleeve 200 is generally not visible from the outside, Figure 1 This part is schematically drawn to show more clearly the arrangement of the fiber optic gun barrel 100 within the fiber optic gun barrel protective sleeve 200.

[0033] See Figures 1 to 3 The furnace information detection device shown can be installed on industrial kilns such as blast furnaces, with its head extending into the furnace and its tail outside. During operation, the fiber optic gun tube 100 transmits the internal optical signal to a spectrometer via optical fiber for analysis to obtain spectral information. The fiber optic gun tube protective sleeve 200 provides functions such as water cooling, airtightness protection, and air purging for cleaning, as well as other auxiliary and support functions. Although the furnace information detection device is described below using a blast furnace scenario as an example, it is understood that this furnace information detection device can also be used in other types of industrial kilns or other applications requiring spectral acquisition and analysis.

[0034] like Figure 4As shown, the optical fiber lance protection cylinder 200 of the in-furnace information detection device of the smelting furnace can include a cooling sleeve 210 for cooling and lowering the temperature of the optical fiber lance 100 inserted therein, so that the components carried by the optical fiber lance 100, such as the optical fiber, the lens, etc., can maintain normal operation in the high-temperature environment of the blast furnace. The cooling sleeve 210 itself can be a part of or formed as a section of the optical fiber lance protection cylinder 200, and correspondingly provides a part of the inner cavity of the optical fiber lance protection cylinder 200 to accommodate the optical fiber lance 100. The cooling sleeve 210 can have a hollow interlayer space 211, that is, the cooling sleeve 210 can have an inner wall and an outer wall, and a cooling liquid such as water can flow in the interlayer space 211 between the inner wall and the outer wall. The cooling liquid can enter and exit the interlayer space 211 cyclically via an inlet 212 and an outlet 213. In Figure 4 The inlet 212 and the outlet 213 are shown to communicate with the interlayer space 211. The optical fiber lance protection cylinder 200 can have a flange 214. The inlet 212 and the outlet 213 can be formed on the side of the flange 214 opposite to the interlayer space 211, and communicate with the interlayer space 211 through the flange 214, respectively. In other embodiments, other cooling structures can be used instead of the cooling sleeve.

[0035] Figure 4 and Figure 5 It is also shown that the front end of the inner wall of the cooling sleeve 210 is provided with a limiting structure 217, which ensures that the optical fiber lance 100 is inserted in a fixed position and does not protrude out of the cooling sleeve 210, and the limiting structure 217 leaves an air passage so that the light collecting mirror remains and is exposed at the head end of the optical fiber lance. Cooling gas can be blown outwards through the air passage. The head end of the optical fiber lance 100 is connected with a light collecting mirror 102, and the front end of the light collecting mirror has a cylindrical compression cap 104, the tail end of the compression cap 104 is connected with the head end of the optical fiber lance 100 through internal threads, the light collecting mirror 102 is held between the optical fiber lance 100 and the compression cap 104, and the light collecting mirror 102 is connected with the head end of the optical fiber transmission line 121, so that the light from the blast furnace is incident on the optical fiber transmission line 121 via the light collecting mirror. Specifically, the limiting structure 217 is provided at the head end of the cooling sleeve 210, and the limiting structure 217 is provided with a central hole that allows a part of the compression cap 104 to pass through to limit the depth of the optical fiber lance 100 inserted into the optical fiber lance protection cylinder 200.

[0036] Figure 5 For Figure 4Figure 8 is a partial enlarged view of the assembled sectional view of the right end of the in-furnace information detection device of the smelting furnace, showing that the limiting structure 217 includes a support ring 217a and an outer protective cap 217b, the support ring 217a is connected to the outer protective cap 217b through a threaded connection, and the outer protective cap 217b is connected to the front end of the cooling sleeve 210 through a threaded connection. The limiting structure 217 is provided with a central hole located at the center of the support ring 217a, and the support ring 217a has a plurality of air holes 215, and the support ring 217a and the outer protective cap 217b are made of high-temperature resistant materials.

[0037] Referring to Figure 5 , the tail end of the light collecting mirror has a first step portion 218a, and the head end portion of the optical fiber gun barrel 100 abuts against the first step portion 218a, thereby limiting the movement of the light collecting mirror 102 towards the tail end portion thereof; the compression cap 104 has a second step portion 218b therein, and the head end portion of the light collecting mirror 102 abuts against the second step portion 218b, thereby limiting the movement of the light collecting mirror 102 towards the head end portion thereof. The outer surface of the compression cap 104 has a third step portion 218c formed by a large-diameter section and a small-diameter section, and the third step portion 218c is chamfered, and the size of the small-diameter section is suitable for being inserted into the central hole of the limiting structure 217. The outer protective cap 217b has a necked structure, and the plurality of air holes 215 form an air passage with the necked structure, thereby increasing the flow rate of the air flow and avoiding the accumulation of dust and other particulate matters on the surface of the compression cap 104. The head end portion of the compression cap 104 is chamfered, thereby guiding the optical fiber gun barrel 100 to pass through the limiting structure 217, which can be understood as the optical fiber gun barrel 100 passing through the support ring 217a. The limiting structure 217 ensures that the optical fiber gun barrel 100 is fixed in the axial and radial directions after being inserted into the cooling sleeve 210.

[0038] In operation, the cooling gas enters the air inlet 231 and sweeps the optical fiber gun barrel 100, and the cooling gas is swept out through the air passage formed by the plurality of air holes of the limiting structure 217; and the cooling liquid can enter and exit the interlayer space 211 cyclically through the inlet 212 and the outlet 213.

[0039] Figure 1 and Figure 2 Further shown in Figs. 7 and 8 is a flange short pipe 300, which can include a pipe 301 and a flange plate 302 fixedly connected to each other. The flange short pipe 300 can be used as a mounting base of the in-furnace information detection device of the smelting furnace and provides a passage through the furnace shell for the same. In actual installation, the pipe 301 of the flange short pipe 300 can pass through the furnace shell of the blast furnace and be fixedly installed (e.g., welded) on the furnace shell in advance, and the flange plate 302 of the flange short pipe can be located outside the furnace shell. Figure 2 The in-furnace information detection device 10 of the smelting furnace can be inserted into the flange short pipe 300 until the flange plate 214 thereof (see Fig. 8) is located outside the furnace shell. Figure 1) and 302 abut against each other and the head end of the flange 214 penetrates into the furnace through the pipe 301 of the flange 300. Then, the flanges 214 and 302 can be firmly connected to each other by fasteners such as bolts. Although not shown, it is understood that there can be sealing elements such as sealing rings, gaskets, etc. between the flanges 214 and 302. It is noted that the length of the pipe 301 of the flange 300 can be designed such that the head end of the furnace interior information detecting device 10 of the smelting furnace can be exposed outside the pipe 301, as shown in Figure 2

[0040] The optical fiber gun barrel protection cylinder 200 of the furnace interior information detecting device of the smelting furnace will be described below. The optical fiber gun barrel protection cylinder 200 can include a sealing sleeve 240.

[0041] See Figure 2 , there can be a connecting pipe 230 between the sealing sleeve 240 and the cooling sleeve 210. The connecting pipe 230 itself can be a part of or formed as a section of the optical fiber gun barrel protection cylinder 200, and correspondingly provides a part of the inner cavity of the optical fiber gun barrel protection cylinder 200 to accommodate the optical fiber gun barrel 100. The connecting pipe 230 can be fixedly connected (e.g. welded) to the cooling sleeve 210, and can be threadedly connected to the sealing sleeve 240. The connecting pipe 230 can provide a proper joint for installing the sealing sleeve 240, and itself can also be used for installing other components. For example, as shown in Figure 2 , there can be an air inlet 231 formed on the connecting pipe 230 to the inner cavity thereof, so as to inject a gas such as nitrogen into the optical fiber gun barrel protection cylinder 200. As will be seen below, the injected gas can be used for cooling and / or purging, etc. In addition, the connecting pipe 230 can have a required length according to the length of the optical fiber gun barrel 100 or other requirements. The sealing sleeve 240 is used to seal the gap between the optical fiber gun barrel 100 and the optical fiber gun barrel protection cylinder 200. The sealing sleeve 240 can be located at the entrance of the tail end of the optical fiber gun barrel protection cylinder 200. In other words, the sealing sleeve 240 can be formed as the entrance of the optical fiber gun barrel protection cylinder 200. In operation, the sealing sleeve 240 can prevent the smoke and dust in the furnace and / or the gas injected from the air inlet 231 from escaping outward through the gap between the optical fiber gun barrel 100 and the optical fiber gun barrel protection cylinder 200.

[0042] ​When the optical fiber lance protection cylinder 200 is pulled out of the optical fiber lance 100, the sealing sleeve 240 can provide sealing along the pulling-out path of the optical fiber lance. In this way, during the production process of the blast furnace, the optical fiber lance 100 is pulled out of the optical fiber lance protection cylinder 200 as a whole via the sealing sleeve 240. Similarly, when the optical fiber lance 100 is inserted, the optical fiber lance 100 is inserted into the optical fiber lance protection cylinder 200. This achieves the insertion and extraction of the optical fiber lance 100 during the production process of the blast furnace, while avoiding the escape of the substances in the furnace to the outside of the furnace via the outer sleeve 200.

[0043] It should be understood that the optical fiber lance protection cylinder 200 is named only based on its relative position relationship with the optical fiber lance 100, and it does not necessarily include the cooling sleeve 210, the valve 220, the connecting pipe 230, and the sealing sleeve 240 mentioned in the present application. In other embodiments, when the functions of these components are not required, the optical fiber lance protection cylinder 200 can also be a simple cylinder, or only include one or more of these components, or can include components that achieve other functions.

[0044] The optical fiber transmission line 121 can extend from the outside of the optical fiber lance protection cylinder 200 into the optical fiber lance protection cylinder 200 and extend along the optical fiber lance protection cylinder 200 towards its head end. The in-furnace light outside the optical fiber lance protection cylinder 200 can be transmitted by the optical fiber transmission line 121 to the optical spectrometer. The optical fiber transmission line 121 can be one or more optical fibers. The tail end of the optical fiber transmission line 121 has an FC connector, which can be directly connected to the optical spectrometer. The optical spectrometer is connected to a computer through a data line for data analysis and processing. Data can also be transmitted to a remote computer for processing through an optical modem.

[0045] By using the optical fiber lance protection cylinder in the in-furnace information detection device of the smelting furnace, the optical fiber transmission line and the light collector can be stably used in the smelting furnace, and the optical fiber and the light collector are protected from burning and dusting. The external end of the optical fiber transmission line is connected to the optical spectrometer. Real-time spectral data of the smelting furnace can be measured online.

[0046] Referring to Figure 6 The present application also provides an in-furnace information detection system of a smelting furnace, which comprises the in-furnace information detection device 10 provided above. By using the optical fiber lance protection cylinder, the optical fiber transmission line and the light collector can be stably used in the smelting furnace, and the optical fiber and the light collector are protected from burning and dusting. The external end of the optical fiber transmission line is connected to the optical spectrometer. Real-time spectral data of the smelting furnace can be measured online.

[0047] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the examples, those skilled in the art should understand that modifications or equivalent replacements to the technical solutions of the present application can be made without departing from the spirit and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. An in-furnace information detecting device for a smelting furnace, characterized by comprising: It comprises: a fiber gun barrel (100) extending along a length direction and having a head end and a tail end opposite to each other along the length direction; a fiber transmission line (121) for transmitting light spectrum, which extends from outside of the fiber gun barrel into the fiber gun barrel; a cylindrical compression cap (104) having its tail end threadedly connected to the head end of the fiber gun barrel (100); a light collecting mirror (102) connected with the fiber transmission line, which is held between the fiber gun barrel (100) and the compression cap (104); a fiber gun barrel protection cylinder (200) comprising a cooling sleeve (210) having an inner wall and an outer wall with a sandwich space (211) therebetween, the cooling sleeve (210) having an inlet (212) and an outlet (213) communicating with the sandwich space; and a limiting structure (217) provided at the head end of the cooling sleeve (210), the limiting structure (217) being provided with a central hole allowing a portion of the compression cap (104) to pass through to limit the depth of the fiber gun barrel (100) inserted into the fiber gun barrel protection cylinder (200).

2. The apparatus of claim 1, wherein, The limiting structure (217) comprises a support ring (217a) threadedly connecting an outer protective cap (217b), and the outer protective cap (217b) is threadedly connected to the front end of the cooling sleeve (210).

3. The apparatus of claim 1, wherein, It also comprises a sealing sleeve (240) for fixing the fiber gun barrel (100) at the tail end of the fiber gun barrel protection cylinder (200), and a connecting pipe (230) is provided between the sealing sleeve (240) and the cooling sleeve (210), the connecting pipe (230) partially accommodating the fiber gun barrel (100) in its inner cavity, and an air inlet (231) is formed on the connecting pipe (230) to communicate with its inner cavity.

4. The apparatus of claim 2, wherein, The central hole of the limiting structure (217) is located at the center of the support ring (217a), and the support ring (217a) has a plurality of air holes (215).

5. The apparatus of claim 1, wherein, The tail end of the light collecting mirror (102) has a first step portion (218a), and the head end of the fiber gun barrel (100) abuts against the first step portion (218a) to limit the movement of the light collecting mirror (102) towards its tail end; the compression cap (104) has a second step portion (218b) in its inner surface, and the head end of the light collecting mirror (102) abuts against the second step portion (218b) to limit the movement of the light collecting mirror (102) towards its head end.

6. The apparatus of claim 2, wherein, The outer surface of the compression cap (104) has a third step portion (218c) formed by a large diameter section and a small diameter section, and the third step portion (218c) is chamfered to guide the small diameter section to be inserted into the central hole of the limiting structure (217).

7. The apparatus of claim 4, wherein, The outer protective cap (217b) has a necked structure, and the plurality of ventilation holes (215) form an air outlet air passage with the necked structure.

8. The apparatus of claim 3, wherein, One end of the connecting pipe (230) is fixedly connected to the cooling sleeve (210), and the other end is threadedly connected to the sealing sleeve (240).

9. The apparatus of claim 1, wherein, The optical fiber gun barrel protection cylinder (200) has a first flange plate (214); the in-furnace information detection device of the smelting furnace further comprises a flange short pipe (300) comprising a pipe (301) and a second flange plate (302) fixedly connected to each other, and the first flange plate and the second flange plate are firmly connected to each other by fasteners.

10. A furnace information detection system for a smelting furnace, for use in a smelting furnace, characterized in that Comprise: The in-furnace information detection device of the smelting furnace according to any one of claims 1-9, wherein the device is connected with a spectrometer through the optical fiber transmission line (121), and the spectrometer is in communication connection with a computer.

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