Coal charging hole sealing device capable of preventing coke oven flue gas from escaping

Abstract

The utility model belongs to the technical field of coking top coal charging, and particularly relates to a coal charging hole sealing device capable of preventing smoke of a coke oven from escaping. The utility model discloses a coal charging hole sealing device capable of preventing coke oven smoke from escaping. A center hole is formed in a coal charging hole seat, an annular groove is formed in the top of the coal charging hole seat and surrounds the center hole, an asbestos heat insulation layer is fixed to the bottom of the annular groove, an annular magnet is arranged in the asbestos heat insulation layer in a wrapping mode, and the annular groove is filled with an iron ore powder layer attracted by the annular magnet; the bottom of the coal charging hole cover is a central section matched with the central hole of the coal charging hole seat; an annular convex rib plate is arranged below the outer edge of the top of the coal charging hole cover; the annular protruding rib plates can be inserted into the annular grooves. The groove is formed in the top of the coal charging hole seat and forms a labyrinth structure with the raised rib plate on the edge of the hole cover, and iron powder is used for sealing, so that flue gas of a coke oven can be effectively prevented from running and emitting, the difficult problem that an old-fashioned coal charging hole cover cannot be sealed tightly after being buckled and runs and emits gas is solved, and the process of sealing the coal charging hole cover by adopting mud paste becomes history.

Description

Technical Field

[0001] This utility model belongs to the field of top coal charging technology in coking, specifically a coal charging hole sealing device that can prevent coke oven flue gas from escaping. Background Technology

[0002] In coking production, the top charging process is indispensable. The coke oven has a charging hole at the top, which needs to be opened once per cycle. After each charging cycle, the hole cover must be closed, and to prevent coke oven gas from escaping, workers must seal the joint between the charging hole cover and the charging hole seat with mud. This is a labor-intensive task in a harsh working environment. Currently, the design of the charging hole cover and seat is constantly being improved. For example, the seal of the cover and seat is machined into a spherical surface along the circumference. Because spherical seals have the advantage of "universal tightness," they can fit well with the seat even if the cover is slightly tilted. However, in actual production, graphite, tar, and other impurities easily adhere to the joint surface, often affecting the sealing performance. The problem of gas leakage still relies on the primitive method of using loess mud to solve it.

[0003] Not only does the leakage of flue gas affect the environment, but the high temperature of the flue gas can also cause uneven heating and deformation of iron parts. After the coal charging hole cover is put on, the conical (spherical) surface of the cover and the hole seat should fit tightly to prevent the leakage of coke oven flue gas. However, the mating surface is often covered with slag and debris, causing the coal charging hole cover to warp. Employees use a pry bar to insert into the lifting beam at the top of the hole cover to adjust its posture. If it is still not in place, they will illegally knock the hole cover, which often causes damage. Finally, a spoonful of mud paste is needed to seal the area around the hole cover. The labor intensity is high and the working environment is harsh. Utility Model Content

[0004] This invention addresses the serious technical problem of flue gas leakage in the coal charging hole covers used in current coke oven top coal charging holes by providing a coal charging hole sealing device that can prevent coke oven flue gas from escaping.

[0005] This utility model is achieved by the following technical solution: a coal charging hole sealing device that can prevent coke oven flue gas from escaping, including a coal charging hole seat and a coal charging hole cover; the coal charging hole seat has a central hole, and an annular groove is set around the central hole at the top. A ring magnet covered by an asbestos insulation layer is fixed at the bottom of the annular groove, and an iron ore powder layer adsorbed by the ring magnet is filled in the annular groove.

[0006] The bottom of the coal charging hole cover is a central section that matches the central hole of the coal charging hole seat. The outer periphery of the top of the coal charging hole cover extends radially outward to form an outer edge. Below the outer edge, there are two concentric annular raised ribs. The annular raised ribs can be inserted into the annular groove.

[0007] The groove at the top of the coal charging hole seat is similar to a water seal trough. This invention uses iron ore powder as a carrier for sealed flue gas. A ring-shaped magnet covered with an asbestos insulation layer is fixedly arranged at the bottom of the groove, which can attract the iron ore powder and reduce its loss and dispersion. Iron ore powder has a high density, is widely available, and is inexpensive.

[0008] Furthermore, the cross-section of the annular raised rib plate is two triangles, which facilitates insertion into the annular groove and, together with the iron ore powder, achieves a seal between the coal charging hole seat and the coal charging hole cover.

[0009] Furthermore, the central hole of the coal charging hole seat is a conical hole that is wider at the top and narrower at the bottom; the central section of the coal charging hole cover has a conical structure that is narrower at the bottom and wider at the top.

[0010] Furthermore, multiple sets of sealing rings are arranged on the outer circumference of the central section of the coal loading hole cover.

[0011] Furthermore, two lifting beams are symmetrically arranged on the top of the coal loading hole cover with the center as the symmetrical point.

[0012] Furthermore, the top center of the coal charging hole cover has a hole for adding heat-insulating and refractory material, and the inside of the coal charging hole cover is a hollow structure.

[0013] Furthermore, the hollow structure inside the coal loading hole cover has an elliptical cross-section.

[0014] Coal charging hole covers are generally hollow structures. Some are constructed with a bottom opening and refractory material lining, while others are filled with insulating refractory material at the top before being fitted with a snap-on cover, with a lifting beam positioned at the center of the snap-on cover. This invention features a hollow internal structure with an elliptical cross-section. A refractory material filling hole is located at the center of the top of the cover. Two lifting beams are symmetrically arranged on the top of the cover. Raised stiffening ribs are provided along the lower outer edge of the cover. A sealing ring is provided on the outer circumference of the cone-shaped cover. The coal charging hole cover can be formed in one piece during casting, eliminating the need for further machining and resulting in lower manufacturing costs.

[0015] When adjusting the coal charging hole cover, select the nearest lifting beam. The lever fulcrum is closer to the force point, and the radius of rotational torque is also increased. This saves effort, prevents illegal knocking on the furnace cover, and reduces the chance of damage and scrapping due to the additional lifting beam.

[0016] By rotating and pressing the coal charging hole cover, the sealing ring on the cone of the hole cover can be pressed down and penetrate into the slag and debris, and fit tightly with the cone surface of the hole seat to form a ring-shaped seal. The slag inclusions between the hole cover and the hole seat will not affect the sealing effect.

[0017] This utility model uses a groove on the top of the coal charging hole seat and raised ribs on the edge of the hole cover to form a labyrinth structure, and then uses iron powder for sealing. This can effectively prevent coke oven flue gas from escaping and solve the problem of poor sealing and gas leakage after the old coal charging hole cover is fastened. The process of sealing the coal charging hole cover with mud paste will become history. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the utility model.

[0019] Figure 2 Schematic diagram of the coal loading hole cover (side section).

[0020] Figure 3 for Figure 2 A top-down view.

[0021] 1-Coal charging hole seat, 2-Coal charging hole cover;

[0022] 11-Asbestos insulation layer, 12-Ring magnet, 13-Iron ore powder layer;

[0023] 21- Annular raised stiffener, 22- Sealing ring, 23- Lifting beam, 24- Insulation and refractory material addition hole, 25- Hollow structure. Detailed Implementation

[0024] Example 1 A coal charging hole sealing device that can prevent coke oven flue gas from escaping includes a coal charging hole seat 1 and a coal charging hole cover 2; the coal charging hole seat 1 has a central hole, and an annular groove is provided around the central hole at the top. A ring magnet 12 covered by an asbestos insulation layer 11 is fixed at the bottom of the annular groove, and an iron ore powder layer 13 adsorbed by the ring magnet 12 is filled in the annular groove.

[0025] The bottom of the coal charging hole cover 2 is a central section that matches the central hole of the coal charging hole seat 1. The outer periphery of the top of the coal charging hole cover 2 extends radially outward to form an outer edge. Below the outer edge, there are two concentric annular raised ribs 21. The annular raised ribs 21 can be inserted into the annular groove. The cross-section of the annular raised ribs 21 is two triangles. In particular, they can be stuck on both sides of the annular magnet 12, and the iron powder completely covers the annular magnet 12.

[0026] Example 2: Based on Example 1, the central hole of the coal charging hole seat 1 is a conical hole that is wider at the top and narrower at the bottom; the central section of the coal charging hole cover 2 has a conical structure that is wider at the top and narrower at the bottom; multiple sets of sealing rings 22 are arranged on the outer circle of the conical central section of the coal charging hole cover 2. The use of a conical mating surface that is larger at the top and smaller at the bottom results in a better sealing effect.

[0027] Example 3: Two lifting beams 23 are symmetrically arranged on the top of the coal loading hole cover 2 with the center as the symmetrical point.

[0028] Example 4: The top center of the coal charging hole cover 2 has a heat insulation and refractory material addition hole 24, and the inside of the coal charging hole cover 2 is a hollow structure 25; the cross-section of the hollow structure 25 inside the coal charging hole cover 2 is elliptical.

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] This utility model is a coal charging hole sealing device that can prevent coke oven flue gas from escaping. The core components are designed to be simple. First, an annular groove is set at the top of the coal charging hole seat 1. An annular magnet 12 covered with an asbestos insulation layer 11 is arranged at the bottom of the groove. Iron ore powder is adsorbed on the top and fills the groove. Second, a coal charging hole cover 2 is matched with the hole seat. The lower edge of the hole cover has two concentric annular raised ribs 21. After the hole cover is fastened to the hole seat, the two raised ribs sink into the iron ore powder layer 13 in the groove of the hole seat, which can seal the flue gas escape channel. Specifically: the coal charging hole seat 1 has an annular groove at the top. The bottom of the groove is fixed with an asbestos insulation layer 11; an annular magnet 12 is wrapped in the center of the asbestos insulation layer; an iron ore powder layer 13 is covered on top; the coal charging hole cover 2, the traditional coal charging hole cover 2 has a disc-shaped top with a lifting beam 23 in the center, and a frustum (spherical) structure at the bottom (designed to match the coal charging hole seat), and is filled with heat-insulating refractory material. Improvements are made based on this design. The outer edge of the top disc of the orifice cover is extended, and two annular raised ribs 21 are provided at the bottom. The cross-section of the two annular raised ribs 21 is triangular, and their dimensions correspond to the grooves of the coal charging orifice seat, ensuring that the annular raised ribs 21 of the orifice cover can sink into the iron ore powder in the groove of the orifice seat. Multiple sets of sealing rings 22 are arranged on the outer circle of the cone (spherical) structure of the orifice cover. The single lifting beam 23 set at the center of the top of the orifice cover is improved to two symmetrically set lifting beams 23. A heat insulation and refractory material addition hole 24 is set at the center of the coal charging orifice cover 2. When the surface of the inner cone of the orifice seat is covered with slag and impurities, causing the orifice cover to warp, that is, when there is slag between the coal charging orifice cover and the orifice seat and the fit is uneven, a pry bar is inserted into the lifting beam 23 on the nearest side, rotated left and right and lifted and pressed the orifice cover. The sealing rings 22 on the cone of the orifice cover can then be pressed down and penetrate into the slag and impurities to fit tightly with the cone surface of the orifice seat to form an annular seal. The lifting beams 23 are symmetrically arranged on both sides. When adjusting the level of the charging hole cover, the lever fulcrum is closer to the force point, and the radius of rotational torque is also increased accordingly, making the effort saving obvious. A sealing ring 22 is set on the outer circle of the cone-shaped coal charging hole cover. The top of the coal charging hole seat 1 is provided with a groove and the raised ribs on the edge of the hole cover to form a labyrinth structure. Iron ore powder is used for sealing, which can effectively prevent coke oven flue gas from escaping. This solves the problem of poor sealing and flue gas leakage after the old coal charging hole cover is fastened. The process of sealing the coal charging hole cover with mud paste will become history. The lower outer circumference of the coal charging hole cover is equipped with two annular raised ribs 21, which serve as both sealing components and enhance the deformation resistance of the cover. Traditionally designed hole covers have a simple frustum (spherical) structure at the bottom, providing good sealing when matched with the hole seat. However, if slag is trapped, it creates a channel for flue gas to overflow. This invention improves the frustum (spherical) structure by adding a sealing ring. The sealing ring fits snugly against the hole seat, ensuring a sealed flue gas channel while still allowing for a gap to accommodate slag. Therefore, slag trapped between the hole cover and the hole seat will not affect the flue gas sealing effect. With this improvement, when combined with an automatic cover-opening system, the manual labor intensity can be greatly reduced.

Claims

1. A sealing device for a coal charging hole capable of preventing coke oven gas from running off, comprising a coal charging hole seat (1) and a coal charging hole cover (2); characterized in that, The coal charging hole seat (1) is provided with a center hole, and an annular groove is arranged around the center hole at the top. An annular magnet (12) covered by an asbestos heat insulation layer (11) is fixed at the bottom of the annular groove. An iron ore powder layer (13) is filled in the annular groove and is adsorbed by the annular magnet (12). The bottom of the coal charging hole cover (2) is a center section matched with the center hole of the coal charging hole seat (1). The top of the coal charging hole cover (2) is radially outwardly extended to form an outer edge. Two concentric annular raised rib plates (21) are arranged below the outer edge. The annular raised rib plates (21) can be inserted into the annular groove.

2. A sealing device for a coal charging hole capable of preventing the escape of coke oven gas according to claim 1, wherein The cross section of the annular raised rib plate (21) is two triangles.

3. A sealing device for a coal charging hole capable of preventing the escape of coke oven gas according to claim 1, wherein The center hole of the coal charging hole seat (1) is a tapered hole with the upper part being wide and the lower part being narrow. The center section of the coal charging hole cover (2) is a tapered structure with the upper part being wide and the lower part being narrow.

4. A sealing device for a coal charging hole capable of preventing the escape of coke oven gas according to any one of claims 1 to 3, wherein A plurality of groups of sealing rings (22) are arranged on the outer circle of the center section of the coal charging hole cover (2).

5. A sealing device for a coal charging hole capable of preventing the escape of coke oven gas according to any one of claims 1 to 3, wherein Two lifting beams (23) are symmetrically arranged on the top of the coal charging hole cover (2) with the center as the symmetric point.

6. A sealing device for a coal charging hole capable of preventing the escape of coke oven gas according to any one of claims 1 to 3, wherein An insulating refractory material adding hole (24) is arranged at the center of the top of the coal charging hole cover (2). The inside of the coal charging hole cover (2) is a hollow structure (25).

7. A sealing device for a coal charging hole capable of preventing the escape of coke oven gas according to claim 6, wherein The cross section of the hollow structure (25) inside the coal charging hole cover (2) is an ellipse.

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