A non-metallic support device for hot blast furnace checkered brick masonry

Abstract

The invention discloses a non-metallic support device for a hot blast furnace lattice brick masonry, comprising a non-metallic grate plate, a non-metallic support and mounting accessories, wherein the non-metallic grate plate is supported on the top of the non-metallic support, and the non-metallic support is fixed and supported on the hot blast furnace bottom plate or the hot blast furnace foundation through the mounting accessories; the non-metallic grate plate is composed of a middle grate plate located in the middle of the hot blast furnace plane and a peripheral grate plate surrounding the middle grate plate, and the middle grate plate and the peripheral grate plate are supported by at least one non-metallic support. The invention has a long-term safe use temperature greater than 1200°C, and can realize a combustion exhaust gas temperature greater than 800°C in the production operation of the hot blast furnace. The waste heat of the high-temperature exhaust gas can be used to heat the temperature of the combustion-supporting air to more than 600°C and the temperature of the coal gas to more than 300°C, thereby reducing the fuel consumption of the hot blast furnace system and reducing carbon emissions, and avoiding the defects of oxidation corrosion, heavy weight, and high investment of metal grates and grate support.

Description

Technical Field

[0001] The invention relates to the technical field of hot blast furnaces for iron-making blast furnaces, and in particular to a non-metallic supporting device for a checkered brick masonry of a hot blast furnace. Background Art

[0002] The checker brick masonry in the regenerator of the hot blast furnace is a refractory heat exchanger used to absorb the heat of the combustion flue gas and heat the blast furnace blast. It is made up of several single checker bricks. The checker brick masonry is supported by the grate at the bottom of the regenerator, and the grate is supported on the grate pillars below it.

[0003] At present, the grates and grate pillars supporting the lattice brick masonry of the hot blast furnace are made of metal castings such as ductile iron, heat-resistant cast iron, and high-chromium cast iron. Since these metal materials have obvious strength attenuation at high temperatures, the current maximum operating temperature of the grates and grate pillars is less than 450°C. Using the waste heat of the hot blast furnace to increase the temperature of the combustion air and gas is a mature modern technology, which has the comprehensive effects of increasing the hot blast temperature, reducing fuel consumption, and reducing the carbon emissions of the hot blast furnace.

[0004] However, due to the aforementioned safe operating temperature limit of the metal grate and grate support, the temperature of the exhaust gas from the hot blast furnace cannot be further increased, which affects the acquisition of higher combustion air and gas temperatures, and is therefore not conducive to further reducing the fuel consumption of the hot blast furnace and the carbon emissions of the hot blast furnace system. At the same time, the metal grate and grate support also have defects such as oxidation corrosion, thermal fatigue, heavy weight, and high investment. For this reason, we have introduced a non-metallic support device for the lattice brick masonry of the hot blast furnace. Summary of the invention

[0005] The object of the present invention is to provide a non-metallic supporting device for a checkered brick masonry of a hot blast furnace to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a non-metallic support device for a hot blast furnace lattice brick masonry, comprising a non-metallic grate plate, a non-metallic support and installation accessories, wherein the non-metallic grate plate is supported on the top of the non-metallic support, and the non-metallic support is fixed and supported on the bottom plate of the hot blast furnace or the foundation of the hot blast furnace through the installation accessories, and a bottom groove matching the cross-sectional shape of the non-metallic support is provided on the lower surface of the non-metallic grate plate at the support of the non-metallic support;

[0007] The non-metallic grate plate consists of a central grate plate located in the middle of the hot blast furnace plane and peripheral grate plates surrounding the central grate plate. The plane projection shape of the central grate plate is a rectangle or a regular hexagon; the edge projection shape of the peripheral grate plate toward the outside of the furnace is an arc or a polygon, and the plane projection shape of the remaining edges matches the edge shape of the adjacent central grate plate and peripheral grate plate; the central grate plate and the peripheral grate plate are supported by at least one non-metallic pillar.

[0008] The cross-sectional shape of the non-metallic support is circular, hexagonal or rectangular. The lower section of the non-metallic support is a solid cylinder, and the upper section is a hollow cylinder. An inverted cone cavity is provided at the top of the hollow cylinder of the upper section. The inverted cone cavity is in the shape of an inverted cone with a gradually increasing size.

[0009] The hollow cylinder of the non-metallic support has a through hole connected to the outer surface of the cylinder and the inner cavity.

[0010] A metal base is provided at the lower end of the non-metallic support, a pad is provided at the lower end of the metal base, and a connecting piece for installing the non-metallic support is provided on the metal base.

[0011] The middle grating plate and the peripheral grating plate are provided with vertical grating holes matching the grating holes of the grating bricks. A single vertical grating hole matches a single grating hole of the grating bricks or three grating holes of the grating bricks. The cross-sectional shape of the vertical grating hole is circular, regular hexagonal or petal-shaped.

[0012] The edges and corners of the middle grate plate and the peripheral grate plates are provided with vertical grate grooves matching the lattice brick holes. A single vertical grate groove matches a single or three complete lattice brick holes or incomplete lattice brick holes of the lattice brick. The cross-sectional shape of the vertical grate groove is circular, regular hexagonal or petal-shaped.

[0013] The vertical grating holes or vertical grating grooves on the lower surfaces of the middle grating plate and the peripheral grating plates which are shielded by the tops of the non-metallic pillars have air flow channels which are connected with the vertical grating holes or vertical grating grooves which are not shielded.

[0014] The upper surfaces of the middle grating plate and the peripheral grating plate are provided with top surface grooves which match the position and size of the bosses on the bottom surfaces of the checker bricks.

[0015] The non-metallic grate plates and non-metallic pillars are made of Al2O3-SiO2 refractory materials.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a long-term safe operating temperature greater than 1200°C, and can achieve a combustion exhaust gas temperature greater than 800°C in the production operation of the hot blast furnace. The waste heat of this high-temperature exhaust gas can be used to heat the temperature of the combustion air to above 600°C and the gas temperature to above 300°C, thereby reducing the fuel consumption of the hot blast furnace system, reducing carbon emissions, and avoiding the defects of oxidation corrosion of metal grates and grate supports, heavy weight, and high investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a plan view of embodiment 1 of the present invention;

[0018] Figure 2 for Figure 1 Sectional view at AA;

[0019] Figure 3 for Figure 1 The enlarged view of point E;

[0020] Figure 4 for Figure 2 The enlarged view of point B;

[0021] Figure 5 It is a plan view of Embodiment 2 of the present invention;

[0022] Figure 6 for Figure 5 Cross-sectional view at BB;

[0023] Figure 7 for Figure 5 Enlarged view of point C;

[0024] Figure 8 for Figure 6 Enlarged view of point D.

[0025] In the figure: 1. non-metallic pillar; 11. metal base; 12. column; 13. internal cavity; 14. through hole; 15. inverted cone cavity; 2. non-metallic grate plate; 21. middle grate plate; 22. peripheral grate plate; 23. vertical grate hole; 24. vertical grate groove; 25. bottom surface groove; 26. top surface groove; 27. air flow channel; 28. lattice brick lattice hole; 3. pad; 4. connector; 5. lattice brick. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1: See Figure 1-4 The lattice brick 5 selected in this embodiment is a seven-hole lattice brick, and each complete lattice brick 5 has three bosses on its bottom surface. The non-metallic support device for the lattice brick masonry of the hot blast furnace provided by the present invention comprises a non-metallic grate plate 2, a non-metallic support 1 and installation accessories. The non-metallic grate plate 2 is supported on the top of the non-metallic support 1, and the non-metallic support 1 is fixed and supported on the bottom plate of the hot blast furnace through the installation accessories. The bottom surface of the non-metallic grate plate 2 at the support of the non-metallic support 1 has a bottom groove 25 that matches the cross-sectional shape of the non-metallic support 1;

[0028] The non-metallic grate plate 2 is composed of a central grate plate 21 located in the middle of the hot blast furnace plane and a peripheral grate plate 22 surrounding the central grate plate 21. The plane projection shape of the central grate plate 21 is a rectangle; the edge projection shape of the peripheral grate plate 22 toward the outside of the furnace is an arc, and the plane projection shape of the remaining edges matches the edge shape of the adjacent central grate plate 21 and the peripheral grate plate 22; the central grate plate 21 and the peripheral grate plate 22 are supported by a non-metallic pillar 1.

[0029] The cross-sectional shape of the non-metallic pillar 1 is circular, the lower section is a solid cylinder, and the upper section is a hollow cylinder. The top of the hollow cylinder of the upper section is provided with an inverted cone cavity 15, and the inverted cone cavity 15 is an inverted cone shape with gradually increasing size.

[0030] The hollow cylinder of the non-metallic support 1 is provided with a through hole 14 connected to the outer surface of the cylinder 12 and the inner cavity 13 .

[0031] A metal base 11 is disposed at the lower end of the non-metallic support 1 , a pad 3 is disposed at the lower end of the metal base 11 , and a connector 4 for installing the non-metallic support 1 is disposed on the metal base 11 .

[0032] The middle grating plate 21 and the peripheral grating plate 22 are provided with vertical grating holes 23 matching the seven-hole grating brick grating holes 28. A single vertical grating hole 23 matches a single grating brick grating hole 28 of the grating brick 5. The cross-sectional shape of the vertical grating hole 23 is circular.

[0033] The edges and corners of the middle grate plate 21 and the peripheral grate plate 22 are provided with vertical grate grooves 24 matching the checker brick lattice holes 28. A single vertical grate groove 24 matches a single complete checker brick lattice hole 28 or an incomplete checker brick lattice hole 28 of the checker brick 5. The cross-sectional shape of the vertical grate groove 24 is circular.

[0034] The vertical grating holes 23 on the lower surfaces of the middle grating plate 21 and the peripheral grating plate 22 that are blocked by the top of the non-metallic support 1 have air flow channels 27 that are connected to the unblocked vertical grating holes 23 .

[0035] The upper surfaces of the middle grate plate 21 and the peripheral grate plate 22 are provided with top surface grooves 26 that match the position and size of the bottom surface bosses of the checker bricks 5 .

[0036] The non-metallic grate plate 2 and the non-metallic support column 1 are made of Al2O3-SiO2 refractory materials.

[0037] Example 2: See attached Figure 5-8 The lattice brick 5 selected in this embodiment is a 19-hole lattice brick, and each complete lattice brick 5 has three bosses on its bottom surface. The non-metallic support device for the lattice brick masonry of the hot blast furnace provided by the present invention includes a non-metallic grate plate 2, a non-metallic support 1 and installation accessories. The non-metallic grate plate 2 is supported on the top of the non-metallic support 1, and the non-metallic support 1 is fixed and supported on the bottom plate of the hot blast furnace through the installation accessories. The bottom surface of the non-metallic grate plate 2 at the support of the non-metallic support 1 has a bottom groove 25 that matches the cross-sectional shape of the non-metallic support 1;

[0038] The non-metallic grate plate 2 is composed of a middle grate plate 21 located in the middle of the hot blast furnace plane and a peripheral grate plate 22 surrounding the middle grate plate 21. The plane projection shape of the middle grate plate 21 is a regular hexagon; the edge projection shape of the peripheral grate plate 22 toward the outside of the furnace is an arc shape, and the plane projection shape of the remaining edges matches the edge shape of the adjacent middle grate plate 21 and the peripheral grate plate 22; the middle grate plate 21 and the peripheral grate plate 22 are supported by a non-metallic pillar 1.

[0039] The cross-sectional shape of the non-metallic support 1 is circular, hexagonal or rectangular. The lower section of the non-metallic support 1 is a solid cylinder, and the upper section is a hollow cylinder. An inverted cone cavity 15 is provided at the top of the hollow cylinder. The inverted cone cavity 15 is in the shape of an inverted cone with a gradually increasing size.

[0040] The hollow cylinder of the non-metallic support 1 is provided with a through hole 14 connected to the outer surface of the cylinder 12 and the inner cavity 13 .

[0041] A metal base 11 is disposed at the lower end of the non-metallic support 1 , a pad 3 is disposed at the lower end of the metal base 11 , and a connector 4 for installing the non-metallic support 1 is disposed on the metal base 11 .

[0042] The middle grating plate 21 and the peripheral grating plate 22 have vertical grating holes 23 matching the grating holes 28 of the grating bricks. A single vertical grating hole 23 matches three grating holes 28 of the grating bricks 5. The vertical grating holes 23 are circular in shape.

[0043] The edges and corners of the middle grate plate 21 and the peripheral grate plate 22 are provided with vertical grate grooves 24 matching the checker brick lattice holes 28. A single vertical grate groove 24 matches a single or three complete checker brick lattice holes 28 or incomplete checker brick lattice holes 28 of the checker brick 5. The cross-sectional shape of the vertical grate groove 24 is circular.

[0044] The vertical grating holes 23 on the lower surfaces of the middle grating plate 21 and the peripheral grating plate 22 that are blocked by the top of the non-metallic support 1 have air flow channels 27 that are connected to the unblocked vertical grating holes 23 .

[0045] The upper surfaces of the middle grate plate 21 and the peripheral grate plate 22 are provided with top surface grooves 26 that match the position and size of the bottom surface bosses of the checker bricks 5 .

[0046] The non-metallic grate plate and the non-metallic support 1 are made of Al2O3-SiO2 refractory materials.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A non-metallic support device for a hot blast furnace checkered brick masonry, comprising a non-metallic grate plate (2), a non-metallic support (1) and mounting accessories, characterized in that: The non-metallic grate plate (2) is supported on the top of the non-metallic support (1); the non-metallic support (1) is fixed and supported on the bottom plate of the hot blast furnace or the foundation of the hot blast furnace by installing accessories; the bottom surface groove (25) matching the cross-sectional shape of the non-metallic support (1) is provided on the lower surface of the non-metallic grate plate (2) at the support of the non-metallic support (1); the non-metallic grate plate (2) is composed of a middle grate plate (21) located in the middle of the hot blast furnace plane and a peripheral grate plate (22) surrounding the middle grate plate (21); the plane projection shape of the middle grate plate (21) is a rectangle or a regular hexagon; the edge projection shape of the peripheral grate plate (22) facing outside the furnace is an arc or a polygon, and the plane projection shape of the remaining edges is the same as that of the adjacent middle grate plate (21). The edge shapes of the middle grating plate (21) and the peripheral grating plate (22) match each other; the middle grating plate (21) and the peripheral grating plate (22) are supported by at least one non-metallic pillar (1); the cross-sectional shape of the outer surface of the non-metallic pillar (1) is circular, hexagonal or rectangular; the lower section of the non-metallic pillar (1) is a solid cylinder, and the upper section is a hollow cylinder; the top of the hollow cylinder of the upper section is provided with an inverted cone cavity (15), and the inverted cone cavity (15) is an inverted cone shape with a gradually increasing size; the hollow cylinder of the non-metallic pillar (1) has a through hole (14) connected to the outer surface of the cylinder (12) and the internal cavity (13); the lower end of the non-metallic pillar (1) is provided with a metal base (11), and the metal base (11) A pad (3) is provided at the lower end, and a connecting piece (4) for mounting a non-metallic support (1) is provided on the metal base (11); vertical grating holes (23) matching the lattice brick lattice holes (28) are provided in the middle grating plate (21) and the peripheral grating plate (22); a single vertical grating hole (23) matches a single lattice brick lattice hole (28) or three lattice brick lattice holes (28) of the lattice brick (5); and the cross-sectional shape of the vertical grating hole (23) is circular, regular hexagonal, or petal-shaped; vertical grating grooves (24) matching the lattice brick lattice holes (28) are provided at the edges and corners of the middle grating plate (21) and the peripheral grating plate (22); a single vertical grating groove (24) matches a single or three complete lattice brick lattice holes (28) of the lattice brick (5). The cross-sectional shape of the sub-brick lattice holes (28) or incomplete lattice brick lattice holes (28) and the vertical grating grooves (24) is circular, regular hexagonal or petal-shaped; the vertical grating holes (23) or vertical grating grooves (24) on the lower surfaces of the middle grating plate (21) and the peripheral grating plate (22) that are blocked by the top of the non-metallic support (1) have air flow channels (27) that are connected to the unblocked vertical grating holes (23) or vertical grating grooves (24); the upper surfaces of the middle grating plate (21) and the peripheral grating plate (22) are provided with top surface grooves (26) that match the position and size of the bottom surface boss of the lattice brick (5); and the non-metallic grating plate (2) and the non-metallic support (1) are made of Al2O3-SiO2 refractory material.

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