Combustion-supporting air supply pipeline structure of hot blast stove

Abstract

The utility model discloses a hot blast stove combustion-supporting air supply pipeline structure which comprises a combustion-supporting fan, a hot blast stove, a plurality of annular air pipes, a plurality of air distribution branch pipes and an adjusting assembly, the hot blast stove is vertically provided with the annular air pipes in a surrounding mode, the annular air pipes are communicated with the combustion-supporting fan, the annular air pipes are provided with the air distribution branch pipes in a radioactive mode, and the air distribution branch pipes are communicated with the adjusting assembly. One end of the air distribution branch pipe is communicated with the annular air pipe, and the other end of the air distribution branch pipe is communicated with an inner cavity of the hot-blast stove; the annular air pipe and the air distribution branch pipes are arranged, the air distribution branch pipes are exposed out of the hot blast stove, the adjusting assemblies are arranged on the portions, located on the outer side of the hot blast stove, of the air distribution branch pipes, and the air inlet amount in each air distribution branch pipe is adjusted through the adjusting assemblies, so that it is guaranteed that the air amount entering the hot blast stove from the multiple air distribution branch pipes on the annular air pipe is the same; the air quantity at each position in the hot-blast stove is uniformly distributed, so that the combustion in the hot-blast stove is sufficient, the combustion efficiency is improved, and the energy waste is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hot blast stoves, in particular to a combustion-supporting air supply pipeline structure of a hot blast stove. Background Art

[0002] In the production process of building ceramic powder, the hot air furnace supporting spray drying is the core equipment that burns fuels such as natural gas, water-coal slurry, pulverized coal, etc. to generate heat energy to heat the air and provide the drying heat source. The combustion efficiency of the hot air furnace often affects the spray drying energy consumption per ton of powder, and also affects the production cost per ton of powder.

[0003] There are several factors that affect the combustion efficiency of the hot blast stove, such as the structure of the furnace, the structure of the combustion lance, the structure of the combustion-supporting air supply duct, etc. In the combustion-supporting air supply duct structure of the traditional cylindrical hot blast stove, the combustion-supporting fan of the hot blast stove blows the combustion-supporting air into the hollow interlayer between the inner and outer layers of the furnace wall of the hot blast stove through the duct, and then the combustion-supporting air is sent into the furnace to be burned together with the fuel through the multiple main air ducts evenly distributed along the inner side of the cylindrical furnace wall and extending into the furnace.

[0004] Although this circular built-in air distribution duct structure is simple and practical, it also has obvious shortcomings. That is, when the combustion-supporting air sent into the hollow interlayer enters the various fuel-supporting air distribution ducts along the cylindrical furnace wall, the air supply paths are different in distance, resulting in different air pressures and air volumes entering each air distribution duct, which causes uneven distribution of the combustion-supporting air supplied to the furnace, resulting in insufficient and incomplete combustion of the fuel and a waste of energy.

[0005] In view of this, the existing technology still needs to be improved and developed. Utility Model Content

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a hot blast furnace combustion-supporting air supply duct structure, aiming to solve the problem that the existing combustion-supporting air supply duct structure causes uneven distribution of the combustion-supporting air supplied into the furnace, resulting in insufficient combustion of the fuel.

[0007] The technical solution adopted by the utility model to solve the technical problem is as follows:

[0008] A hot blast furnace combustion-supporting air supply pipeline structure comprises a combustion-supporting fan and a hot blast furnace, and also comprises:

[0009] A plurality of annular air ducts are arranged around the periphery of the hot blast furnace and are arranged vertically at intervals; the annular air ducts are connected to the combustion-supporting fan;

[0010] A plurality of air distribution branch pipes are radially arranged on the annular air duct; one end of the air distribution branch pipe is connected to the annular air duct, and the other end is connected to the inner cavity of the hot air furnace;

[0011] The regulating component is arranged on the air distribution branch pipe and is used for regulating the air intake volume in the air distribution branch pipe.

[0012] Furthermore, the adjustment component includes:

[0013] A regulating valve, arranged on the air distribution branch pipe, for regulating the air intake volume in the air distribution branch pipe;

[0014] The measuring meter is arranged on the air distribution branch pipe.

[0015] Furthermore, a measurement interface is provided on the air distribution branch pipe, and the measurement meter cooperates with the measurement interface.

[0016] Furthermore, the multiple air distribution branch pipes are arranged in a spiral shape.

[0017] Furthermore, the combustion-supporting fan comprises:

[0018] Fan body;

[0019] The first air supply pipe and the second air supply pipe are both arranged inside the fan body; and the plurality of air distribution branch pipes are respectively connected to the first air supply pipe and the second air supply pipe.

[0020] Furthermore, the air distribution branch pipe and the bottom of the annular air duct are arranged at an inclination.

[0021] Furthermore, the annular air duct is connected to the combustion-supporting fan via a connecting air duct.

[0022] Furthermore, the regulating valve is an electric regulating valve.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] In the utility model, a plurality of annular air ducts are arranged vertically around the hot blast stove, the annular air ducts are connected with the combustion-supporting fan, a plurality of air distribution branch pipes are radially arranged on the annular air duct, one end of the air distribution branch pipe is connected with the annular air duct, and the other end is connected with the inner cavity of the hot blast stove, and an adjusting component is arranged on the air distribution branch pipe and is located outside the hot blast stove; by arranging the annular air duct and the air distribution branch pipe, the air distribution branch pipe can be exposed on the outside of the hot blast stove, and an adjusting component is arranged on the part of the air distribution branch pipe located on the outside of the hot blast stove, so as to facilitate the adjustment of the air intake volume in each air distribution branch pipe, so as to ensure that the air volume entering the hot blast stove from the plurality of air distribution branch pipes on the annular air duct is the same by adjusting the plurality of adjusting components, and the air volume at each position inside the hot blast stove is evenly distributed, so that the hot blast stove is fully burned, the combustion efficiency is improved, and the energy waste is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1It is a schematic diagram of the overall structure of the utility model.

[0026] Figure 2 for Figure 1 An enlarged schematic diagram of point A.

[0027] Figure 3 This is a schematic diagram of the air distribution branch pipe structure of the utility model.

[0028] Figure 4 This is a schematic diagram of the structure of the combustion-supporting fan of the utility model.

[0029] Figure 5 It is a schematic diagram of the air supply structure of a hot blast furnace in the prior art.

[0030] Figure 6 for Figure 5 An enlarged schematic diagram of point B.

[0031] The numbers marked in the figure are as follows: 1. combustion-supporting fan; 11. fan body; 12. first air supply duct; 13. second air supply duct; 14. connecting air duct; 2. hot air furnace; 3. annular air duct; 4. air distribution branch pipe; 41. measuring interface; 5. regulating component; 51. regulating valve; 52. measuring meter. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0033] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] As attached Figure 5 and attached Figure 6 As shown, in the combustion-supporting air supply duct structure of a traditional cylindrical hot blast furnace 2, the combustion-supporting blower 1 of the hot blast furnace 2 blows the combustion-supporting air into the hollow interlayer 6 between the inner and outer layers of the furnace wall of the hot blast furnace 2 through the duct, and then the combustion-supporting air is sent into the furnace to be burned together with the fuel through the multiple main air ducts 7 evenly distributed along the inner side of the cylindrical furnace wall and extending into the furnace.

[0036] Although this annular built-in air distribution duct 7 structure is simple and practical, it also has obvious shortcomings. That is, when the combustion-supporting air supplied into the hollow interlayer 6 enters each fuel-supporting air distribution duct 7 along the cylindrical furnace wall, the air pressure and air volume entering each air distribution duct 7 will be different due to the different distances of the air supply path, resulting in uneven distribution of the combustion-supporting air supplied to the furnace, causing insufficient and incomplete combustion of the fuel and resulting in waste of energy.

[0037] In view of the shortcomings of the prior art, this embodiment provides a hot blast furnace combustion-supporting air supply pipeline structure, which can be specifically referred to as follows:

[0038] As attached Figure 1 and attached Figure 2As shown, a hot blast stove combustion-supporting air supply pipeline structure comprises a combustion-supporting fan 1, a hot blast stove 2, a plurality of annular air ducts 3, a plurality of air distribution branches 4 and an adjustment component 5, the combustion-supporting fan 1 is located on one side of the hot blast stove 2, the plurality of annular air ducts 3 are all arranged around the periphery of the hot blast stove 2 and are coaxially arranged with the hot blast stove 2, the plurality of annular air ducts 3 are arranged at intervals along the height direction of the hot blast stove 2, that is, they are arranged vertically, the inside of the annular air duct 3 is air, and the annular air duct 3 is connected to the combustion-supporting fan 1, air can be supplied into the annular air duct 3 through the combustion-supporting fan 1, a plurality of air distribution branches 4 are radially arranged on the annular air duct 3, the plurality of air distribution branches 4 are all located at the bottom of the annular air duct 3, and the diameter of the air distribution branch 4 is smaller than that of the annular air duct 3. The diameter of the annular air duct 3 is such that one end of the air distribution branch pipe 4 is connected to the interior of the annular air duct 3, and the other end is connected to the inner cavity of the hot blast stove 2, so that the wind inside the annular air duct 3 can be sent into the inner cavity of the hot blast stove 2 to help the fuel inside the hot blast stove 2 to burn. A part of the air distribution branch pipe 4 is located on the outside of the hot blast stove 2, and the other part is located in the wall of the hot blast stove 2. The air distribution branch pipe 4 located on the outside of the hot blast stove 2 is provided with an adjustment component 5. The adjustment component 5 is used to adjust the air intake in the air distribution branch pipe 4 to ensure that the air intake in each air distribution branch pipe 4 is the same, so that the air volume at each position inside the hot blast stove 2 is the same, and the fuel in the hot blast stove 2 is ensured to be fully burned.

[0039] Specifically, the combustion-supporting fan 1 is connected to the annular air duct 3 through a pipe, and supplies air to the inside of the annular air duct 3. The air inside the annular air duct 3 is then sent into the cavity of the hot blast furnace 2 through a plurality of air distribution branch pipes 4. Since the air distribution branch pipes 4 close to the annular air duct 3 will receive the wind first, that is, the air supply path of each air distribution branch pipe 4 is different in distance, the air distribution branch pipes 4 close to the air inlet of the annular air duct 3 will receive the wind first and send it into the hot blast furnace 2. At this time, the air distribution branch pipes 4 far away from the air inlet of the annular air duct 3 have not received the wind yet, which will cause the wind pressure and air volume entering each air distribution branch pipe 4 to be different, thereby causing uneven distribution of the combustion-supporting air in the hot blast furnace 2, resulting in insufficient and incomplete combustion of the fuel, and causing waste of energy. The present application arranges an adjustment component 5 on the air distribution branch pipe 4 located on the outside of the hot blast furnace 2, so as to adjust the air volume and air pressure in the air distribution branch pipe 4, thereby achieving uniform distribution of the combustion-supporting air sent into the hot blast furnace 2, which is conducive to sufficient combustion of the fuel.

[0040] As attached Figure 2 As shown, the regulating component 5 includes a regulating valve 51 and a measuring meter 52. The regulating valve 51 is arranged on the air distribution branch pipe 4, and is used to adjust the air intake in the air distribution branch pipe 4. The measuring meter 52 is arranged on the air distribution branch pipe 4, and is used to measure various data of the combustion-supporting air in the air distribution branch pipe 4. The regulating valve 51 and the measuring meter 52 are both located on the outside of the hot blast furnace 2 to facilitate adjustment and measurement. The data measured by the measuring meter 52 can be used to control the opening and closing size of the regulating valve 51 to achieve the adjustment of the air supply volume in each air distribution branch pipe 4, so as to improve the uniform distribution of the combustion-supporting air.

[0041] In one embodiment of the present application, the measuring meter 52 may be a pressure gauge, a flow meter or a psychrometer, etc. Different measuring meters 52 may be installed according to the measurement requirements to facilitate the control of the opening and closing size of the regulating valve 51 and adjust the air intake volume in multiple air distribution branch pipes 4.

[0042] In one embodiment of the present application, a measuring interface 41 is provided on the air distribution branch pipe 4, and the air distribution branch pipe 4 is connected to the outside world through the measuring interface 41. The measuring interface 41 cooperates with a measuring meter 52, and the measuring meter 52 can be installed at the position of the measuring interface 41 to facilitate the measurement of the data of the combustion-supporting air inside the air distribution branch pipe 4, thereby assisting the adjustment of the regulating valve 51.

[0043] In this embodiment, the inside of the measuring interface 41 is provided with an internal thread, and the outside of the joint of the measuring meter 52 is provided with an external thread. The external thread cooperates with the internal thread to connect the measuring meter 52 to the measuring interface 41 to measure the data of the combustion-supporting air.

[0044] In this embodiment, when the measuring meter 52 is not provided at the measuring interface 41 , it is generally sealed by a plug to prevent air leakage at the measuring interface 41 .

[0045] In this embodiment, a scale is provided on the outer side of the regulating valve 51. By rotating the regulating valve 51, the opening and closing degree of the regulating valve 51 can be determined to facilitate adjustment of the intake volume of the combustion-supporting air inside the air distribution branch pipe 4.

[0046] As attached Figure 3 As shown, multiple air distribution branch pipes 4 are arranged in a spiral shape, and each air distribution branch pipe 4 is at a certain angle to the radial line of the hot blast stove 2, that is, the air distribution branch pipes 4 are inserted into the inner wall of the hot blast stove 2 at an angle, and multiple air distribution branch pipes 4 are inclined in a clockwise direction; through multiple inclined air distribution branch pipes 4, when air is introduced, a wind vortex can be formed inside the hot blast stove 2, and the uniformity of the combustion-supporting air can be further adjusted to ensure that the fuel inside the hot blast stove 2 is fully burned.

[0047] As attached Figure 4 As shown, the combustion-supporting fan 1 includes a fan body 11, a first air supply pipe 12 and a second air supply pipe 13. The fan body 11 is arranged on one side of the hot blast stove 2, and the first air supply pipe 12 and the second air supply pipe 13 are arranged inside the fan body 11. The wind generated by the fan body 11 is transported to the first air supply pipe 12 and the second air supply pipe 13, and a plurality of annular air ducts 3 are respectively connected with the first air supply pipe 12 and the second air supply pipe 13; specifically, a plurality of annular air ducts 3 located in the upper half of the hot blast stove 2 are connected with the first air supply pipe 12, and a plurality of annular air ducts 3 located in the lower half of the hot blast stove 2 are connected with the second air supply pipe 13. The air supply to the annular air ducts 3 is provided by the first air supply pipe 12 and the second air supply pipe 13 to meet the air supply volume in the plurality of air distribution branch pipes 4.

[0048] In one embodiment of the present application, the combustion-supporting fan 1 includes two fan bodies 11 , which are respectively connected to a first air supply pipe 12 and a second air supply pipe 13 to ensure the air supply volume inside the first air supply pipe 12 and the second air supply pipe 13 .

[0049] In one embodiment of the present application, the air distribution branch pipe 4 is connected to the annular air duct 3 by welding, and welding sealant is provided at the welding point to prevent air leakage from the weld.

[0050] In one embodiment of the present application, the annular air duct 3 is connected to the combustion-supporting fan 1 via a connecting air duct 14 to facilitate the combustion-supporting fan 1 to supply air into the annular air duct 3 .

[0051] In one embodiment of the present application, the regulating valve 51 is an electric regulating valve, and a controller electrically connected to the electric regulating valve is also provided on the outside of the hot air furnace 2. The controller sends a signal to open the electric regulating valve to a certain angle, thereby controlling the air intake in the air distribution branch pipe 4.

[0052] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the solutions disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not disclosed in the present solution. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present invention are indicated by the claims.

Claims

1. A hot blast stove combustion-supporting air supply pipeline structure, comprising a combustion-supporting fan and a hot blast stove, characterized in that: Also includes: A plurality of annular air ducts are arranged around the periphery of the hot blast furnace and are arranged vertically at intervals; the annular air ducts are connected to the combustion-supporting fan; A plurality of air distribution branch pipes are radially arranged on the annular air duct; one end of the air distribution branch pipe is connected to the annular air duct, and the other end is connected to the inner cavity of the hot air furnace; The regulating component is arranged on the air distribution branch pipe and is used for regulating the air intake volume in the air distribution branch pipe.

2. A hot blast stove combustion-supporting air supply pipeline structure according to claim 1, characterized in that: The adjustment component comprises: A regulating valve, arranged on the air distribution branch pipe, for regulating the air intake volume in the air distribution branch pipe; The measuring meter is arranged on the air distribution branch pipe.

3. A hot blast stove combustion-supporting air supply pipeline structure according to claim 2, characterized in that: The air distribution branch pipe is provided with a measurement interface, and the measurement meter cooperates with the measurement interface.

4. The hot blast stove combustion-supporting air supply pipeline structure according to claim 1, characterized in that: The multiple air distribution branch pipes are arranged in a spiral shape.

5. The hot blast stove combustion-supporting air supply pipeline structure according to claim 1, characterized in that: The combustion-supporting fan comprises: Fan body; The first air supply pipe and the second air supply pipe are both arranged inside the fan body; and the plurality of air distribution branch pipes are respectively connected to the first air supply pipe and the second air supply pipe.

6. The hot blast stove combustion-supporting air supply pipeline structure according to claim 1, characterized in that: The air distribution branch pipe is connected to the annular air duct by welding.

7. The hot blast stove combustion-supporting air supply pipeline structure according to claim 1, characterized in that: The annular air duct is connected to the combustion-supporting air fan through a connecting air duct.

8. The hot blast stove combustion-supporting air supply pipeline structure according to claim 2, characterized in that: The regulating valve is an electric regulating valve.

Images