In-furnace imaging device of dry quenching furnace

Abstract

The utility model discloses an in-furnace imaging device of a dry quenching furnace, which comprises an outer pipe, an inner pipe, a camera, a sealing sleeve and an in-out actuating mechanism, the device is horizontally arranged on a furnace top cone at the upper part of the dry quenching furnace, the outer pipe extends into the dry quenching furnace, the camera is arranged at the front end of the inner pipe, and the in-out actuating mechanism drives the inner pipe to extend into or retreat from the outer pipe. The front end of the outer pipe and the front end of the inner pipe are each provided with a through inclined round hole, the axes of the two inclined round holes coincide after the inner pipe stretches into the outer pipe, the camera collects images of the coke charge level condition and the furnace wall state in the dry quenching furnace through the two inclined round holes at an inclined downward angle, and cooling gas is introduced into the outer pipe and the inner pipe. The cooling gas can eliminate the influence of high temperature and dust in the furnace on the camera, and the sealing sleeve can prevent the cooling gas from overflowing out of the furnace. The device is horizontally installed on a furnace top cone, the camera extends into the furnace and inclines downwards to carry out large-range image acquisition, and the camera can stably work for a long time in a high-temperature dust environment in the furnace through a cooling protection measure.

Description

Technical Field

[0001] This utility model relates to the field of image acquisition technology for the internal space of dry quenching furnaces in the coking industry, specifically to an imaging device for the inside of a dry quenching furnace. Background Technology

[0002] The dry quenching furnace is a crucial piece of equipment in the dry quenching process of the coking industry. The furnace body, from top to bottom, consists of a cone-shaped top, a pre-storage chamber (annular gas duct), an inclined flue, and a cooling chamber. It is primarily composed of refractory bricks, insulation materials, and a steel outer shell. The entire furnace is a sealed structure, resulting in a high internal temperature during production. During the dry quenching process, red-hot coke at approximately 1000°C is loaded into the pre-storage chamber from the top. The coke then descends into the cooling chamber, where it exchanges heat with the circulating gas blown in from the bottom. Once cooled to below 200°C, the coke is discharged from the dry quenching furnace through the bottom coke discharge device. The cooled circulating gas is then discharged through the annular flue for use in preheating power generation and other processes.

[0003] The loading of red-hot coke into the pre-storage chamber via the top hopper of the dry quenching furnace will result in varying material surface shapes. Uneven material surface shapes and uneven descent can cause material segregation, leading to uneven circulating gas distribution, uneven coke cooling, ineffective heat recovery from the red-hot coke, and even the discharge of red-hot coke. Therefore, real-time monitoring of the material surface condition in the pre-storage chamber after coke loading is essential.

[0004] The inner wall of the pre-storage chamber is subjected to enormous pressure and friction generated by the descent of coke, leading to wall deformation and wear, and even the risk of wall collapse. Therefore, real-time monitoring of the pre-storage chamber wall is essential.

[0005] Currently, the only monitoring device in China for the internal monitoring of dry quenching coke pre-storage chambers is the material level height measurement device. This device cannot reflect dynamic information such as the shape of the material surface and the trend of material descent. There is no effective way to monitor the material surface condition and the condition of the pre-storage chamber furnace wall. When problems occur, the furnace opening can only be opened for manual observation. However, since the temperature of red coke inside the furnace is as high as 1000℃, the brightness inside the furnace is large, and the environment at the furnace opening is harsh and dangerous, manual observation cannot guarantee accuracy, safety, or real-time performance. Utility Model Content

[0006] The purpose of this invention is to provide an imaging device inside a dry quenching furnace, which can monitor the material surface condition in the pre-storage chamber in real time after coking and also detect the condition of the furnace wall in the pre-storage chamber.

[0007] To achieve the above objectives, this utility model employs the following technical solution:

[0008] An imaging device for a dry quenching furnace includes an outer tube 1, an inner tube 2, a camera 3, a sealing sleeve 4, and an inlet / outlet actuator 5. The outer tube 1 is fitted onto the inner tube 2, with the rear end of the inner tube 2 extending beyond the outer tube 1. The front end of the outer tube 1 has an outer conical cap 1.1 with an outer circular hole 1.2 on its inclined side. The rear end of the outer tube 1 has an outer air inlet 1.3 and a sealing sleeve 4, which encloses the inner tube to prevent gas in the outer tube 1 from escaping from the space between the outer tube 1 and the inner tube 2. The front end of the inner tube 2 has an inner conical cap 2.1 with an inner circular hole 2.2 on its inclined side. The rear end of the inner tube 2... There is an inner air inlet 2.3. The inlet / outlet actuator 5 has a slide 5.1. The slide 5.1 is connected to the inner tube 2 through an L-shaped connecting plate 6. The inlet / outlet actuator 5 drives the inner tube 2 to extend into or out of the outer tube 1 through the slide 5.1. After extension, the outer circular hole 1.2 and the inner circular hole 2.2 coincide to form a through hole. The camera 3 is tilted and fixed at the front end of the inner tube 2 and performs imaging through the outer circular hole 1.2 and the inner circular hole 2.2. The outer air inlet 1.3 and the inner air inlet 2.3 are used to introduce cooling gas, and the cooling gas is discharged through the outer circular hole 1.2 and the inner circular hole 2.2.

[0009] Furthermore, camera 3 uses a conical pinhole lens, which is characterized by its small size and large imaging range.

[0010] Furthermore, the camera 3 is installed at an angle at the front end of the inner tube 2. After the inner tube 2 extends into the outer tube 1, the axes of the outer circular hole 1.2 and the inner circular hole 2.2 coincide to form a downward inclined through hole. The camera 3 acquires images through the through hole.

[0011] Furthermore, the sealing sleeve 4 includes a sealing gland threaded pressure ring 4.1 and a sealing gland 4.2. The sealing gland threaded pressure ring 4.1 is tightly attached to the sealing gland 4.2. The sealing gland 4.2 is used to wrap around the inner tube 2. The sealing gland threaded pressure ring 4.1 is used to squeeze the sealing gland 4.2 to prevent gas in the outer tube 1 from overflowing from the interlayer between the outer tube 1 and the inner tube 2.

[0012] Furthermore, the inner tube 2 has a wire-passing sealing head 2.4 at its rear end, through which the signal line 3.1 of the camera 3 is led out of the inner tube 2.

[0013] Furthermore, the infeed / outfeed actuator 5 employs a linear guide cylinder, a linear lead screw, and a transmission chain to achieve linear reciprocating motion.

[0014] Furthermore, the actuator 5 is connected to the automatic control system for automatic control of the linear reciprocating motion of the actuator.

[0015] The advantages of this invention are as follows: the imaging device inside the dry quenching furnace is horizontally installed on the top cone of the furnace, and the entry and exit actuator moves linearly in the horizontal direction, occupying little space in the vertical direction; the camera extends into the furnace and tilts downward to capture a wide range of video images; cooling gas is introduced into both the inner and outer pipes to protect the camera, enabling it to work stably for a long time in the high-temperature and dusty environment inside the furnace; in case of abnormality, the camera can be quickly and automatically withdrawn outside the furnace through the entry and exit actuator to avoid damage.

[0016] This device can monitor dynamic information such as the shape of the material surface inside the furnace, the trend of the material surface descent, and the condition of the furnace wall in real time, providing important information for troubleshooting dry quenching coke production, optimizing production processes, and ensuring smooth production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first state structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the second state structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the on-site installation of this utility model;

[0020] In the diagram: 1-Outer tube; 1.1-Outer conical plug; 1.2-Outer circular hole; 1.3-Outer air inlet; 2-Inner tube; 2.1-Inner conical plug; 2.2-Inner circular hole; 2.3-Inner air inlet; 2.4-Wire sealing head; 3-Camera; 3.1-Signal line; 4-Sealing sleeve; 4.1-Sealing box threaded pressure ring; 4.2-Sealing box; 5-Infeed / outfeed actuator; 5.1-Infeed / outfeed mechanism slide; 6-L-shaped connecting plate; 7-Inlet / outlet actuator fixing plate; 8-Fixed base; 9-Mounting base; 9.1-Furnace wall embedded pipe; 9.2-Fixed base; 10-Fixed screw; 11-Furnace wall; 11.1-Refractory brick; 11.2-Insulation material; 11.3-Steel shell; 12-An imaging device for a dry quenching furnace pre-storage chamber; 13-Pre-storage chamber; 14-Furnace top cone; 15-Pre-storage chamber furnace wall; 16-Coke feed surface. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] Example 1

[0023] This embodiment discloses an imaging device inside a dry quenching furnace, including an outer tube 1, an inner tube 2, a camera 3, a sealing sleeve 4, and an in-and-out actuator 5. The outer tube 1 is sleeved on the inner tube 2, and the rear end of the inner tube 2 extends out of the outer tube 1.

[0024] Please refer to Figure 1 ,2 The outer tube 1 has an outer conical cap 1.1 at its front end, with an outer circular hole 1.2 on the beveled side of the cap. The outer tube 1 has an outer air inlet 1.3 and a sealing sleeve 4 at its rear end. The sealing sleeve 4 includes a sealing gland threaded pressure ring 4.1 and a sealing gland 4.2, with the sealing gland threaded pressure ring 4.1 tightly attached to the sealing gland 4.2. The inner tube 2 has an inner conical cap 2.1 at its front end, with an inner circular hole 2.2 on the beveled side of the cap. The inner tube 2 has an inner air inlet 2.3 and a wire-passing sealing head 2.4 at its rear end. The inlet / outlet actuator 5 has a slide 5.1, which is connected to the inner tube 2 via an L-shaped connecting plate 6. The inlet / outlet actuator 5 drives the inner tube 2 to extend into or out of the outer tube 1 via the slide 5.1. After extension, the axes of the outer circular hole 1.2 and the inner circular hole 2.2 coincide to form a through hole. The camera 3 is tilted and fixed at the front end of the inner tube 2. The camera 3 uses a conical pinhole lens, which has the characteristics of small size and large imaging range.

[0025] During operation, inner tube 2 extends into outer tube 1. Please refer to... Figure 1 The sealing gland 4.2 encloses the inner tube 2, and the sealing gland 4.2 is compressed by the threaded pressure ring 4.1, thereby preventing gas in the outer tube 1 from escaping from the interlayer between the outer tube 1 and the inner tube 2. The outer circular hole 1.2 and the inner circular hole 2.2 have their axes coincident, forming a downward-sloping through hole. The camera 3 images through the outer circular hole 1.2 and the inner circular hole 2.2. The signal line 3.1 of the camera 3 is led out through the outer air inlet 1.3 and the inner air inlet 2.3 of the inner tube 2 via the wire sealing head 2.4 for the introduction of cooling gas. The camera 3 is protected by the cooling gas introduced into the outer tube 1 and the inner tube 2, and the cooling gas can be discharged through the outer circular hole 1.2 and the inner circular hole 2.2.

[0026] When the machine stops working, inner tube 2 exits from outer tube 1. Please refer to [the instructions]. Figure 2 The slide 5.1 of the actuator 5 drives the inner tube 2 out of the outer tube 1 via the L-shaped connecting plate 6, and the camera 3 exits simultaneously. The actuator 5 can be operated using devices capable of linear reciprocating motion, such as linear guide cylinders, linear lead screws, or transmission chains. The actuator 5 can also be connected to an automatic control system for automatic control of its actions.

[0027] Example 2

[0028] This embodiment discloses an installation example of an in-furnace imaging device for a dry quenching furnace. Please refer to [link / reference]. Figure 3 The mounting base 9 is composed of a furnace wall embedded tube 9.1 and a fixed base 9.2 welded together. The furnace wall embedded tube 9.1 passes through the refractory brick 11.1, heat insulation material 11.2, and steel shell 11.3 of the furnace wall 11 and is welded and fixed to the steel shell 11.3. The imaging device 12 inside the dry quenching furnace is horizontally installed on the furnace top cone 14. The fixed base 8 is connected and fixed to the fixed base 9.2 by the fixing screw 10. The camera 3 extends into the furnace wall 11 and tilts downward to image the coke material surface 15 and the pre-storage chamber furnace wall 16.

[0029] Working Principle: This device employs high-temperature environment video monitoring technology, cooling protection technology, and linear reciprocating travel technology. During operation, the camera is inserted into the furnace from the top cone to capture wide-range video images of the material surface shape, its descent trend, and the state of the furnace walls in the pre-storage chamber. Cooling protection technology ensures stable operation of the camera in the high-temperature, dusty environment inside the furnace. Linear reciprocating travel technology enables the camera to enter and exit the dry quenching furnace; combined with the automatic control system, it allows for automatic camera entry and exit.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An imaging device for a dry quenching furnace, comprising an outer tube (1), an inner tube (2), a camera (3), a sealing sleeve (4), and an entry / exit actuator (5), characterized in that: The outer tube (1) is fitted onto the inner tube (2), with the rear end of the inner tube (2) extending out of the outer tube (1). The front end of the outer tube (1) has an outer conical cap (1.1) with an outer circular hole (1.2) on the inclined side of the cap. The rear end of the outer tube (1) has an outer air inlet (1.3) and a sealing sleeve (4), which encloses the inner tube. The front end of the inner tube (2) has an inner conical cap (2.1) with an inner circular hole (2.2) on the inclined side of the cap. The rear end of the inner tube (2) has an inner air inlet (2.3). The in-and-out actuator (5) has a slide (5.1), which is connected to the inner tube (2) via an L-shaped connecting plate (6). The in-and-out actuator (5) drives the inner tube (2) to extend into or out of the outer tube (1) via the slide (5.1). After extension, the outer circular hole (1.2) and the inner circular hole (2.2) coincide to form a through hole. The camera (3) is tilted and fixed at the front end of the inner tube (2) and performs imaging through the outer circular hole (1.2) and the inner circular hole (2.2).

2. The imaging device inside a dry quenching furnace according to claim 1, characterized in that: The camera (3) uses a tapered pinhole lens.

3. The imaging device inside a dry quenching furnace according to claim 1, characterized in that: The camera (3) is installed at an angle at the front end of the inner tube (2). After the inner tube (2) extends into the outer tube (1), the axes of the outer circular hole (1.2) and the inner circular hole (2.2) coincide to form a downward inclined through hole. The camera (3) acquires images through the through hole.

4. The imaging device inside a dry quenching furnace according to claim 1, characterized in that: The sealing sleeve (4) includes a sealing gland threaded pressure ring (4.1) and a sealing gland (4.2). The sealing gland threaded pressure ring (4.1) is tightly attached to the sealing gland (4.2). The sealing gland (4.2) is used to wrap the inner tube (2). The sealing gland threaded pressure ring (4.1) is used to squeeze the sealing gland (4.2).

5. The imaging device inside a dry quenching furnace according to claim 1, characterized in that: The inner tube (2) has a wire sealing head (2.4) at the rear end, and the signal line (3.1) of the camera (3) is led out of the inner tube (2) through the wire sealing head (2.4).

6. The imaging device inside a dry quenching furnace according to claim 1, characterized in that: The infeed / outfeed actuator (5) uses a linear guide cylinder, a linear lead screw, and a transmission chain to achieve linear reciprocating motion.

7. The imaging device inside a dry quenching furnace according to claim 1, characterized in that: The entry / exit actuator (5) is connected to the automatic control system for automatic control of the linear reciprocating motion of the actuator.

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