Focusing grid and focusing car for coking

Abstract

The application discloses a coke guide grid and a coke guide car for coking, and relates to the technical field of coking energy saving and environmental protection. The coke guide grid comprises a box-shaped main frame, a coke guide bottom groove and a lining plate sealing system. The lining plate sealing system comprises inner lining plates and a lining plate mounting rack. The lining plate mounting rack is fixed to the inner side of the box-shaped main frame. The inner lining plates are evenly laid on the inner side of the lining plate mounting rack. An installation gap is reserved between any two adjacent inner lining plates in a cold state. The side of the coke guide grid is sealed by the lining plate sealing system. With the change of temperature, the inner lining plates can freely shrink without any obstruction. When the red coke passes through, the inner lining plates are automatically sealed in the installation gap under the heat, which can prevent air from entering and prevent the penetration of fire, and can meet the environmental protection requirements and avoid the damage of the frame under high temperature. The design life of the coke guide grid can reach 30 years. During the operation of the coke guide grid, no special person is needed to track and maintain, and the unnecessary labor cost and maintenance material cost are reduced, thereby bringing considerable economic benefits to the coking enterprises.

Description

Technical Field

[0001] This invention belongs to the field of coke oven coking, and relates to coking energy-saving and environmental protection technology, particularly to a coking guide grid and a coking guide car for coking that are energy-saving, environmentally friendly, and have a long service life. Background Technology

[0002] The coke guide grid is a crucial component in the coke guiding process of a coking plant. After coking in the coke oven, a coke pusher pushes the red-hot coke from the other side of the carbonization chamber (machine side) through the coke guide grid onto the quenching car or dry quenching tank on the coke side. An electric locomotive pulls the quenching car into the quenching tower to spray water and quench the coke, or an electric locomotive pulls the dry quenching tank from a transport vehicle to the dry quenching tower, where the red-hot coke is unloaded into the dry quenching furnace and quenched with nitrogen. During the coking process, each batch of red-hot coke must pass through the coke guide grid into the quenching car or dry quenching tank. The temperature of the red-hot coke exiting the furnace is around 1000 degrees Celsius, and 3-4 batches are processed per hour. The coke guide grid operates in a harsh working environment with frequent and rapid temperature changes, making it prone to deformation.

[0003] Traditional coke guide grids use ordinary 5-7 meter long channel steel welded to the outer frame for the contact area with the hot coke. Channel steel has a high coefficient of thermal expansion, leading to severe deformation, especially at the contact area with the coke oven mouth. New coke guide grids require almost daily maintenance after 1-2 months of use. During coke discharge, daily monitoring and maintenance are necessary, which is not only labor-intensive and time-consuming, but also carries the risk of pushing the grid onto the quenching car or dry quenching tank if maintenance is delayed, causing serious accidents. Furthermore, the sealing device at the contact area with the oven mouth of traditional coke guide grids is made of 304 stainless steel. 304 stainless steel has an austenitic microstructure and a coefficient of thermal expansion more than twice that of carbon steel. When heated and deformed, it fails to provide a seal, resulting in severe dust and black smoke overflow during coke discharge. This not only accelerates the damage to the coke guide grid but is also detrimental to environmental protection.

[0004] Therefore, there is an urgent need in this field to propose an energy-saving, environmentally friendly, long-lasting, and well-sealed coke guide grid to solve the problems existing in the traditional coke guide grid. Summary of the Invention

[0005] The purpose of this invention is to provide a novel coke guide grid and a coke guide car for coking. The coke guide grid does not deform, has a reliable seal with the furnace mouth, and not only has a long service life, but also saves energy, reduces consumption, and is environmentally friendly, thereby solving the problems existing in the traditional coke guide grid.

[0006] To achieve the above objectives, the present invention provides the following solution: This invention provides a focus guide grid, comprising: A box-shaped main frame, wherein any two adjacent main columns in the box-shaped main frame are connected by lateral supports; The focus guide groove is fixed to the bottom of the box-shaped main frame and is made of steel plate. A liner sealing system includes inner liner plates and liner mounting frames. The liner mounting frames are fixed to the inner side of the box-shaped main frame. Multiple inner liner plates are evenly laid on the inner side of the liner mounting frames, and an installation gap is reserved between any two adjacent inner liner plates in the cold state. The installation gap is configured such that when the coke is heated, the thermal expansion of each inner liner plate causes the installation gap to close automatically. The liner sealing system is provided on the inner side of each side wall of the box-shaped main frame.

[0007] Preferably, the liner mounting bracket is a composite structure, comprising: A T-shaped steel mounting bracket, comprising a vertical steel plate and a horizontal steel plate fixed perpendicularly to the vertical steel plate, wherein the T-shaped steel mounting bracket is fixed to the inner side of the box-shaped main frame by the horizontal steel plate; The liner mounting base is a heat-resistant stainless steel plate that is compositely fixed to the inner side of the vertical steel plate; the inner liner is fixed to the inner side of the liner mounting base.

[0008] Preferably, the liner mounting base and the vertical steel plate of the T-shaped iron mounting frame are provided with liner connecting holes, and stainless steel sleeves are embedded in the liner connecting holes; the inner liner is connected to the liner mounting frame by liner mounting bolts, and the liner mounting bolts pass through the stainless steel sleeves.

[0009] Preferably, the main column is made of square tubular steel with a wall thickness of 10mm, and the transverse support is made of rectangular square tubing with a cross-sectional dimension of 150mm×150mm and a wall thickness of 10mm.

[0010] Preferably, the thickness of the horizontal steel plate is 14mm, the thickness of the vertical steel plate is 16mm, and the thickness of the liner mounting base is 5mm.

[0011] Preferably, the coke guide groove is made of 20mm thick Q355B steel plate.

[0012] Preferably, the main column of the box-shaped main frame and the rectangular square tube, as well as the box-shaped main frame and the coke guide groove, are all connected by welding.

[0013] Preferably, the inner lining plates in the lining plate enclosure system are arranged in a crisscross pattern, and the thickness of the inner lining plates is arranged in zones; the lining plate enclosure systems on both sides of the box-shaped main frame have the same structure and are arranged symmetrically.

[0014] Preferably, in the liner enclosure system, the inner surfaces of all the inner liner plates are flush, wherein: The total thickness of the two horizontal rows of inner lining plates at the bottom is 30mm, and the thickness of the main plate is 15mm; Of all the inner lining plates starting from the third horizontal row from the bottom, the total thickness of the inner lining plate in the vertical row located on the furnace opening side is 30mm, and the main plate thickness is 12mm. The total thickness of the remaining inner lining plates is 30mm, and the main plate thickness is 10mm.

[0015] Preferably, the edge of a longitudinal row of inner lining plates located on the furnace opening side is provided with a beveled edge for sealing with the furnace opening.

[0016] Preferably, the installation gap in the cold state is no more than 3mm.

[0017] Preferably, the coke guide grid further includes a drive system for driving the coke guide grid to move and sealing the furnace opening during coke discharge.

[0018] The present invention also proposes a coking guide car, comprising the coking grid described in any one of the above claims.

[0019] The present invention achieves the following technical effects compared to the prior art: The novel coking grid proposed in this invention features a side-sealed liner system. As temperature changes, each inner liner can freely shrink without obstruction. When hot coke passes through, the gaps between the inner liners automatically close due to heat, preventing air ingress and flame penetration. This meets environmental protection requirements and avoids high-temperature damage to the frame. The inner liner, as the innermost layer of the coking grid, blocks the initial high temperature. The heat from the inner liner is then transferred to the liner mounting base, which in turn transfers it to the T-shaped iron mounting frame. The T-shaped iron mounting frame then transfers the heat to the box-type main frame. Through this layered heating and heat loss, the temperature is significantly lower by the time it reaches the T-shaped iron mounting frame and the box-type main frame, thus preventing frame deformation caused by high temperatures.

[0020] Different thicknesses of the inner lining plates in the lining closure system can significantly reduce material costs and avoid waste caused by equal thickness.

[0021] The inner liner of the liner sealing system has a pre-installed installation gap in the cold state and uses the thermal expansion of the liner to achieve self-closure, which solves the contradiction between the cold installation gap and the hot sealing / stress under high temperature conditions and improves the service life of the liner.

[0022] This invention, through rational design and selection of different materials suitable for the coke guide grid for each part, produces a new type of non-deformable, long-lasting, and well-sealed coke guide grid with a designed lifespan of up to 30 years, which can be the same as the coke oven's lifespan. During the operation of the coke guide grid, no special personnel are required to track and maintain it, reducing unnecessary labor costs and maintenance material costs, bringing considerable economic benefits to coking enterprises.

[0023] The coking coke cart proposed in this invention is equipped with the above-mentioned coking guide grid, which has all the features of the above-mentioned coking guide grid, and will not be described in detail here. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the liner arrangement in the liner enclosure system disclosed in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the liner mounting frame in the liner enclosure system disclosed in an embodiment of the present invention.

[0026] In the figure, the reference numerals are: 1-inner lining plate; 11-beveled blade; 2-lining plate mounting bracket; 21-T-shaped iron mounting bracket; 211-vertical steel plate; 212-horizontal steel plate; 22-lining plate mounting base; 3-stainless steel sleeve. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The purpose of this invention is to provide a novel coke guide grid that does not deform, has a reliable seal with the furnace opening, and not only has a long service life but also saves energy, reduces consumption, and is environmentally friendly, thus solving the problems existing in traditional coke guide grids.

[0029] Another object of the present invention is to provide a coking car including the above-described coking grid.

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] This embodiment proposes a coke guide grid, including a box-shaped main frame, a coke guide bottom groove, and a liner sealing system. Any main column in the box-shaped main frame is arranged along the frame height, and any two adjacent main columns are connected by transverse supports to enhance the structural strength of the main frame. The coke guide bottom groove is fixed to the bottom of the box-shaped main frame and is made of steel plate. A liner sealing system is provided on the inner side of each side wall of the box-shaped main frame. The liner sealing system includes an inner liner 1 and a liner mounting frame 2. The liner mounting frame 2 is fixed to the inner side of the box-shaped main frame. Multiple inner liner 1s are evenly laid on the inner side of the liner mounting frame 2, and an installation gap is reserved between any two adjacent inner liner 1s in the cold state. This installation gap is configured such that when the coke is heated, the thermal expansion of each inner liner 1 causes the installation gap to close automatically. By providing a liner sealing system on the inner side of each side wall of the box-shaped main frame, a fully enclosed liner layer is formed inside the coke guide grid.

[0032] The liner mounting bracket 2 adopts a composite structure, specifically including a T-shaped iron mounting bracket 21 and a liner mounting base 22. The T-shaped iron mounting bracket 21 is composed of vertical steel plates 211 and horizontal steel plates 212, which are vertically fixed. The T-shaped iron mounting bracket 21 is fixed to the inner side of the box-type main frame through the end of the horizontal steel plate 212 (i.e., the end of the horizontal steel plate 212 away from the vertical steel plate 211). The liner mounting base 22 is a heat-resistant stainless steel plate, which is fixed to the inner side of the vertical steel plate 211, forming a double-layer composite structure with the vertical steel plate 211. The two together fix the inner liner 1.

[0033] The vertical steel plate 211 of the liner mounting base 22 and the T-shaped iron mounting bracket 21 has a through-hole for the liner connecting plate, and a stainless steel sleeve 3 is embedded in the liner connecting hole. The inner liner 1 is connected to the liner mounting bracket 2 by liner mounting bolts. The liner mounting bolts pass through the inner liner 1 and the stainless steel sleeve 3 and are tightened with a matching nut to fix the inner liner 1 on the liner mounting bracket 2. The liner mounting bolts used to install the inner liner 1 are preferably 304 stainless steel square head M18 bolts.

[0034] In some implementations, the main columns of the box-type main frame are preferably made of square tubular steel with a wall thickness of 10mm, and the lateral supports are made of rectangular square tubular steel with a cross-sectional size of 150mm×150mm and a wall thickness of 10mm.

[0035] In some embodiments, in the T-shaped iron mounting bracket 21 located on the inner side of the coking grid for mounting the inner liner plate 1, the horizontal steel plate 212 is preferably made of steel plate with a thickness of 14mm, and the vertical steel plate 211 is preferably made of steel plate with a thickness of 16mm. The fixing method between the vertical steel plate 211 and the horizontal steel plate 212 includes, but is not limited to, welding.

[0036] In some embodiments, the liner mounting base 22 is preferably made of a 5mm thick heat-resistant stainless steel plate. This heat-resistant stainless steel plate includes, but is not limited to, mainstream austenitic heat-resistant stainless steel, high-chromium heat-resistant and wear-resistant cast steel, chromium-based tungsten-nickel-molybdenum alloy (CrNiMo), etc.

[0037] In some embodiments, the liner mounting base 22 and the vertical steel plate 211 are preferably integrated by welding or pressing.

[0038] In some embodiments, the coke guide bottom trough is preferably made of 20mm thick Q355B steel plate (i.e., low-alloy high-strength structural steel). This steel grade has the characteristics of high temperature resistance, corrosion resistance, fatigue resistance, easy welding and cutting, and easy forming. Preferably, the coke guide bottom trough is fixedly connected to the bottom of the box-type main frame by welding and / or high-strength bolts.

[0039] In some implementations, welding is preferably used to connect the main columns of the box-shaped main frame to the rectangular square tubes, as well as the box-shaped main frame to the coke guide trough.

[0040] In some embodiments, the inner lining plates 1 in the lining plate enclosure system are arranged in a crisscross pattern, and the inner surfaces of all the inner lining plates 1 in the lining plate enclosure system are flush. The thickness of the inner lining plates 1 can be arranged in zones according to the heating and wear conditions of different areas of the coking grid, and can be adjusted according to the actual situation. Generally, the lining plate enclosure systems on both sides of the box-type main frame have the same structure and are arranged symmetrically.

[0041] The coke guide grid adopts a fully covered liner structure. A bottom liner, made of 30mm thick heat-resistant steel, is installed inside the coke guide groove at the bottom of the box-shaped main frame. The specific arrangement of the inner liner 1 in the liner enclosure system on the side of the box-shaped main frame is described in reference [reference needed]. Figure 1The bottom first horizontal row of linings includes multiple lining plates C6 and one lining plate C5 located at the edge. The bottom second horizontal row of linings includes multiple lining plates C4 and one lining plate C3 located at the edge. The lining arrangement of the bottom third to eighth horizontal rows is exactly the same, with each row including multiple lining plates C1 and two vertically arranged lining plates C2 located at the edge. The bottom first and second horizontal rows of linings are the most easily worn parts. The total thickness of these two rows of linings (C3, C4, C5, C6) is the greatest, followed by the total thickness of lining plate C2, and the total thickness of lining plate C1 is the smallest. For example, the total thickness of the bottom first and second rows of linings (C3, C4, C5, C6) is 15mm, the total thickness of lining plate C2 is 12mm, and the total thickness of lining plate C1 is 10mm. This lining arrangement ensures both service life and cost-effectiveness. All lining plate installation gaps must not exceed 3mm in the cold state. After the red coke is inserted, the inner lining plate 1 expands due to heat, causing the lining plate installation gaps to close automatically. This not only prevents air from entering but also prevents fire penetration, effectively protecting the box-type main frame and extending its service life. The installation gaps between adjacent upper and lower inner lining plates, as well as between adjacent left and right inner lining plates, are preferably the same, for example, all set to 3mm.

[0042] Furthermore, it is preferred that all inner lining plates 1 in the side lining plate sealing system adopt the medium carbon high chromium alloy cast steel lining plates of the water quenching coke car disclosed in our company's invention patent application number CN201310143496.3, which have the characteristics of heat resistance, corrosion resistance, wear resistance and low coefficient of thermal expansion.

[0043] Furthermore, we have selected a heat-resistant and wear-resistant steel specifically developed by our company for the bottom liner plate. This area inevitably retains some red-hot slag after coking, and is constantly exposed to high temperatures. Each time coking is performed, the pusher head and the iron shoe grind back and forth across the bottom plate of the coking guide grid. The pusher head, iron shoe, and pusher rod together weigh tens of tons. The working environment here is even harsher, demanding higher quality materials for the liner plate. Since suitable materials for this environment could not be found domestically or internationally, we developed a heat-resistant and wear-resistant steel specifically for the bottom plate of the coking guide grid. Its composition is: C 0.28 / 0.3, Mn 1.2 / 1.4, Si 0.6 / 0.8, Cr 12.5 / 13.5, V 0.25, Ni 0.5, Cu 0.35; heat treatment: diffusion treatment at 1140 degrees Celsius, quenching at 1050 degrees Celsius, tempering at 280 degrees Celsius; the microstructure is martensite with a small amount of austenite. The bottom liner can also be made of the high-carbon chromium alloy cast steel liner material disclosed in the invention patent application number CN201310143496.3.

[0044] In some embodiments, the edge of a longitudinal row of inner lining plates 1 on the furnace opening side of the lining sealing system is provided with a beveled edge 11 for sealing with the furnace opening. Specifically, refer to... Figure 1The beveled edge 11 is specifically set on the liner plates C2, C3 and C5 of the coke guide grid. When sealing the furnace opening, the beveled edge 11 on the right end of the liner plates C2, C3 and C5 forms a hard seal with the edge of the furnace opening.

[0045] In some embodiments, the coke guide grid is also configured to be connected to a drive system for moving the coke guide grid and sealing the furnace mouth during coke discharge. Specifically, the drive system includes a hydraulic cylinder that drives the coke guide grid to move along the working stroke and provides a continuous clamping force at the end of the working stroke to maintain the furnace mouth seal.

[0046] To overcome the shortcomings of traditional focus guide grid technology, this solution proposes a novel focus guide grid that employs a fully enclosed heat-resistant steel lining structure on the sides. The main columns of the box-type main frame are made of 10mm thick square tubular steel, with an additional 150mm spacing between every two main columns. 150mm A 10mm rectangular square tube. The T-shaped iron mounting bracket 21 for mounting the guide grid side liner is welded from 16mm and 14mm thick steel plates, with a 5mm thick heat-resistant stainless steel plate laminated on the inner side of the vertical steel plate 211, and inlaid with a stainless steel sleeve 3, such as... Figure 1 As shown.

[0047] The drive is hydraulic; the furnace opening is sealed during coke discharge. Figure 1 The lining plates C2, C3, and C5 shown have beveled edges 11 that are hard-sealed with the furnace opening.

[0048] The sides of the coke guide grid are sealed by a liner sealing system. As the temperature changes, each inner liner 1 can freely shrink without obstruction. When red coke passes through, the gaps between the inner liner 1 and the heating plate automatically close, which not only prevents air from entering but also prevents fire penetration, meeting environmental protection requirements and avoiding high-temperature damage to the frame. The inner liner 1, as the innermost liner of the coke guide grid, blocks the first high temperature. After being heated, the heat from the inner liner 1 is transferred to the liner mounting base 22, which in turn transfers it to the T-shaped iron mounting frame 21. The T-shaped iron mounting frame 21, after being heated, transfers it to the box-shaped main frame. Through layer-by-layer heating and heat loss, by the time the heat reaches the T-shaped iron mounting frame 21 and the box-shaped main frame, the temperature is very low, and the frame deformation caused by high temperature will not exist.

[0049] Different thicknesses of the inner lining plates in the lining closure system can significantly reduce material costs and avoid waste caused by equal thickness.

[0050] The inner liner of the liner sealing system has a pre-installed installation gap in the cold state and uses the thermal expansion of the liner to achieve self-closure, which solves the contradiction between the cold installation gap and the hot sealing / stress under high temperature conditions and improves the service life of the liner.

[0051] The existing coking grids are difficult to use for a year. They require dedicated personnel to monitor and maintain them every day. Replacing the coking grids every year requires a large crane with a capacity of over 500 tons, costing 40,000 to 50,000 yuan each time. Replacing a coking grid requires at least 72 hours of production downtime, causing huge economic losses to coking enterprises.

[0052] This invention, through rational design and selection of different materials suitable for the coke guide grid for each part, produces a new type of non-deformable, long-lasting, and well-sealed coke guide grid with a designed lifespan of up to 30 years, which can be the same as the coke oven's lifespan. During the operation of the coke guide grid, no special personnel are required to track and maintain it, reducing unnecessary labor costs and maintenance material costs, bringing considerable economic benefits to coking enterprises.

[0053] The aforementioned coking grid is generally used on coking coking cars. The specific installation and configuration methods are well known in the field and will not be described in detail here.

[0054] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0055] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A focus guide grid, characterized in that, include: A box-shaped main frame, wherein any two adjacent main columns in the box-shaped main frame are connected by lateral supports; The focus guide groove is fixed to the bottom of the box-shaped main frame and is made of steel plate. A liner sealing system includes inner liner plates and liner mounting frames. The liner mounting frames are fixed to the inner side of the box-shaped main frame. Multiple inner liner plates are evenly laid on the inner side of the liner mounting frames, and an installation gap is reserved between any two adjacent inner liner plates in the cold state. The installation gap is configured such that when the coke is heated, the thermal expansion of each inner liner plate causes the installation gap to close automatically. The liner sealing system is provided on the inner side of each side wall of the box-shaped main frame.

2. The focus guide grid according to claim 1, characterized in that, The liner mounting bracket is a composite structure, comprising: A T-shaped steel mounting bracket, comprising a vertical steel plate and a horizontal steel plate fixed perpendicularly to the vertical steel plate, wherein the T-shaped steel mounting bracket is fixed to the inner side of the box-shaped main frame by the horizontal steel plate; The liner mounting base is a heat-resistant stainless steel plate that is compositely fixed to the inner side of the vertical steel plate; the inner liner is fixed to the inner side of the liner mounting base.

3. The focus guide grid according to claim 2, characterized in that, The liner mounting base and the vertical steel plate of the T-shaped iron mounting frame are provided with liner connection holes, and stainless steel sleeves are embedded in the liner connection holes; the inner liner is connected to the liner mounting frame by liner mounting bolts, and the liner mounting bolts pass through the stainless steel sleeves.

4. The focus guide grid according to claim 2, characterized in that, The main column is made of square tube steel with a wall thickness of 10mm, and the transverse support is made of rectangular square tube with a cross-sectional size of 150mm×150mm and a wall thickness of 10mm. The thickness of the horizontal steel plate is 14mm, the thickness of the vertical steel plate is 16mm, and the thickness of the liner mounting base is 5mm. The coke guide groove is made of 20mm thick Q355B steel plate.

5. The focus guide grid according to any one of claims 1 to 4, characterized in that, The inner lining plates in the lining plate enclosure system are arranged in a crisscross pattern, and the thickness of the inner lining plates is arranged in zones; the lining plate enclosure system installed on each opposite side of the box-shaped main frame has the same structure and is arranged symmetrically.

6. The focus guide grid according to claim 5, characterized in that, In the liner enclosure system, the inner surfaces of all the inner liner plates are flush, wherein: The total thickness of the two horizontal rows of inner lining plates at the bottom is 30mm, and the thickness of the main plate is 15mm; Of all the inner lining plates starting from the third horizontal row from the bottom, the total thickness of the inner lining plate in the vertical row located on the furnace opening side is 30mm, and the main plate thickness is 12mm. The total thickness of the remaining inner lining plates is 30mm, and the main plate thickness is 10mm.

7. The focus guide grid according to claim 6, characterized in that, The edge of a longitudinal row of inner lining plates located on the side of the furnace opening is provided with a beveled edge for sealing with the furnace opening.

8. The focus guide grid according to any one of claims 1 to 4, characterized in that, The installation gap should not exceed 3mm when the device is cold.

9. The focus guide grid according to any one of claims 1 to 4, characterized in that, It also includes a drive system for driving the coke guide grid to move and sealing the furnace opening during coke discharge.

10. A coking guide car for coking, characterized in that, Includes the focus guide grid as described in any one of claims 1 to 9.

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