Waste heat recovery gas hot blast stove

Abstract

The utility model discloses a waste heat recovery gas hot blast stove which comprises a filtering assembly, the filtering assembly comprises a third ventilation pipe arranged on the right side of a drying box, the other end of the third ventilation pipe is connected with a filtering box, a fourth ventilation pipe is arranged on the left side of the filtering box, and a limiting block is arranged on the inner side of the filtering box. A filter plate is arranged between the upper fixing plate and the lower fixing plate, when waste heat in the furnace body is recycled, hot air in the drying box can pass through the filter box through a third pipeline during recycling, limiting grooves are formed in limiting blocks in the filter box, and protrusions on the fixing plates are inserted into the limiting grooves to fix the fixing plates; due to the fact that the filtering plates are arranged between the upper fixing plate and the lower fixing plate, after being blown into the filtering box from the third pipeline, hot air can be filtered through the two filtering plates, material dust mixed in the drying box by the hot air is filtered, the filtered hot air is recycled into the heat mixing chamber from the fourth pipeline, and impurities in the hot air are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas hot blast furnaces, in particular to a gas hot blast furnace with waste heat recovery. Background Art

[0002] The gas hot air furnace is equipped with a combustion-supporting system for full combustion and a premixed burner device. The inner tank undergoes multiple return combustions, with a large heat transfer area and improved thermal efficiency. The thermal efficiency reaches more than 85%, replacing the steam boiler to supply hot air. The thermal efficiency is more than 1.5 times higher than that of the steam furnace. The existing waste heat recovery gas hot air furnace usually mixes the recovered hot gas directly with the hot air during waste heat recovery. However, the recovered hot air may be mixed with tiny particles of the material after processing the material. Long-term accumulation will cause impurities to accumulate in the furnace body and affect the purity of other materials. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0004] In view of the above problems and / or the problems existing in the existing waste heat recovery gas hot blast furnace, the present utility model is proposed.

[0005] Therefore, the purpose of the present invention is to provide a waste heat recovery gas hot air furnace. When recovering waste heat in the furnace body, a filtering structure is set between the recovery pipes so that the tiny particles of the materials mixed in the hot air can be filtered during the hot air recovery, thereby avoiding the accumulation of particles in the recovered hot air in the furnace body and preventing the impact on the purity of other materials during the drying process.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A waste heat recovery gas hot air furnace, comprising:

[0008] A furnace body, a fan is provided on the right side of the furnace body, a charging port is provided on the upper side of the furnace body, a combustion chamber is provided on the inner side of the furnace body, a first ventilation pipe is provided on the left side of the combustion chamber, a heat mixing chamber is provided at the other end of the first ventilation pipe, a second ventilation pipe is connected to the upper side of the heat mixing chamber, and a drying box is connected to the other end of the second ventilation pipe;

[0009] The filter assembly includes a third ventilation pipe arranged on the right side of the drying box, the other end of the third ventilation pipe is connected to the filter box, a fourth ventilation pipe is arranged on the left side of the filter box, the other end of the fourth ventilation pipe is connected to the heat mixing chamber, a front cover is provided on the front side of the filter box, a limit block is provided on the inside of the filter box, a limit groove is provided on the outside of the limit block, a fixing plate is provided between the limit blocks, and a filter plate is provided between the upper and lower blocks of the fixing plate.

[0010] As a preferred solution of the waste heat recovery gas hot blast furnace described in the utility model, a base is provided on the lower side of the fan, and the base is connected to the right side of the furnace body.

[0011] As a preferred solution of the waste heat recovery gas hot blast furnace described in the utility model, heat dissipation holes are provided on the front side of the furnace body, and a hatch is provided on the front side of the furnace body.

[0012] As a preferred solution of the waste heat recovery gas hot blast furnace described in the present invention, a first air pump is provided on the outside of the second ventilation duct, and a second air pump is provided on the outside of the third ventilation duct.

[0013] As a preferred solution of the waste heat recovery gas hot air furnace described in the utility model, a motor is provided on the upper side of the heat mixing chamber.

[0014] As an optimal solution of the waste heat recovery gas hot air furnace described in the utility model, a rotating rod is provided inside the mixing chamber, the rotating rod passes through the mixing chamber and is connected to the power output end of the motor, and blades are provided on the outside of the rotating rod.

[0015] As an optimal solution of the waste heat recovery gas hot air furnace described in the utility model, a fixing block is provided on the front side of the filter box, a fixing bolt is provided on the inside of the fixing block, the fixing bolt passes through the fixing block and a nut is provided at one end.

[0016] As a preferred solution of the waste heat recovery gas hot air furnace described in the present invention, a handle is provided on the outer side of the filter plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects: when recovering waste heat in the furnace body, the hot air in the drying box will pass through the filter box through the third ventilation duct during recovery, a limiting groove is provided on the limiting block in the filter box, and the protrusion on the fixed plate is inserted into the limiting groove to fix the fixed plate. Since a filter plate is provided between the upper and lower fixed plates, after the hot air is blown into the filter box from the third ventilation duct, the hot air will be filtered by the two filter plates, and the material dust mixed with the hot air from the drying box will be filtered. The filtered hot air will then be collected back into the hot mixing chamber from the fourth ventilation duct, reducing impurities in the hot air and preventing material dust from accumulating everywhere in the furnace body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and detailed embodiments. 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 inventive labor. Among them:

[0019] Figure 1 This is a schematic diagram of the overall structure of a waste heat recovery gas hot blast furnace of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of a waste heat recovery gas hot air furnace of the utility model;

[0021] Figure 3 This is a partial structural diagram of a waste heat recovery gas hot air furnace of the utility model;

[0022] Figure 4 This utility model is a waste heat recovery gas hot air furnace Figure 2 A schematic diagram of the structure of the filtering component in FIG.

[0023] Figure 5 This is a partial structural diagram of a filter assembly of a waste heat recovery gas hot blast furnace according to the present invention. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing the embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0027] The utility model provides a waste heat recovery gas hot blast furnace. When recovering waste heat in the furnace body, a filtering structure is arranged between the recovery pipes, so that tiny particles of materials mixed in the hot blast are filtered during the hot blast recovery, so as to avoid the accumulation of particles in the recovered hot blast in the furnace body and prevent the influence on the purity of other materials during the drying process.

[0028] Figure 1-Figure 5 The figure shows the overall structure of a waste heat recovery gas hot air furnace of the utility model. Figure 1-Figure 5 In this embodiment, a waste heat recovery gas hot air furnace is provided, and its main body includes a furnace body 1 and a filter assembly.

[0029] A fan 2 is provided on the right side of the furnace body 1, a feeding port 3 is provided on the upper side of the furnace body 1, a combustion chamber 4 is provided on the inside of the furnace body 1, a first ventilation pipe 5 is provided on the left side of the combustion chamber 4, a heat mixing chamber 6 is provided at the other end of the first ventilation pipe 5, a second ventilation pipe 8 is connected to the upper side of the heat mixing chamber 6, and the other end of the second ventilation pipe 8 is connected to a drying box 9, a base 17 is provided on the lower side of the fan 2, the base 17 is connected to the right side of the furnace body 1, a heat dissipation hole 18 is provided on the front side of the furnace body 1, a hatch 19 is provided on the front side of the furnace body 1, a first air pump 20 is provided on the outside of the second ventilation pipe 8, a second air pump 21 is provided on the outside of the third ventilation pipe 10, a motor 7 is provided on the upper side of the heat mixing chamber 6, a rotating rod 22 is provided inside the heat mixing chamber 6, the rotating rod 22 passes through the heat mixing chamber 6 and is connected to the power output end of the motor 7, and a blade 23 is provided on the outside of the rotating rod 22.

[0030] The filter assembly includes a third ventilation duct 10 arranged on the right side of the drying box 9, the other end of the third ventilation duct 10 is connected to the filter box 12, a fourth ventilation duct 11 is provided on the left side of the filter box 12, and the other end of the fourth ventilation duct 11 is connected to the heat mixing chamber 6, a front cover 13 is provided on the front side of the filter box 12, a limit block 14 is provided on the inside of the filter box 12, a limit groove is provided on the outside of the limit block 14, a fixing plate 15 is provided between the limit blocks 14, and a filter plate 16 is provided between the upper and lower fixing plates 15. Specifically, in this embodiment, when recovering waste heat in the furnace body 1, the hot air in the drying box 9 will pass through the third ventilation pipe 10 and the filter box 12 during recovery. A limiting groove is provided on the limiting block 14 in the filter box 12, and the protrusion on the fixing plate 15 is inserted into the limiting groove to fix the fixing plate 15. Since a filter plate 16 is provided between the upper and lower fixing plates 15, after the hot air is blown into the filter box 12 from the third ventilation pipe 10, the hot air will be filtered by the two filter plates 16 to filter the material dust mixed with the hot air from the drying box 9, and the filtered hot air will be recycled into the mixing heat chamber 6 from the fourth ventilation pipe 11, thereby reducing impurities in the hot air and preventing material dust from accumulating in various places in the furnace body 1.

[0031] Combine Figure 1-Figure 5, a waste heat recovery gas hot air furnace of this embodiment has the following specific use process: when the furnace body is in use, the material is added to the drying box 9 from the feeding port 3, the air is blown into the combustion chamber 4 through the fan 2, the hot air in the combustion chamber 4 enters the heat mixing chamber 6 through the first ventilation pipe 5, and then the hot air is passed from the second ventilation pipe 8 to the drying box 9 through the first air pump 20 to dry the material. When the waste heat in the furnace body 1 is recovered, the hot air in the drying box 9 flows into the third ventilation pipe 10 through the second air pump 21 and passes through the filter box 12, and the limit block 14 in the filter box 12 A limiting groove is provided on the upper surface, and the protrusion on the fixing plate 15 is inserted into the limiting groove to fix the fixing plate 15. Since a filter plate 16 is provided between the upper and lower fixing plates 15, after the hot air is blown into the filter box 12 from the third ventilation pipe 10, the hot air will be filtered by the two filter plates 16, and the hot air will be filtered from the material dust mixed in the drying box 9. The filtered hot air is then returned to the mixing chamber 6 from the fourth ventilation pipe 11, and the motor 7 on the upper side of the mixing chamber 6 drives the rotating rod 22 provided with blades 23 to rotate, so that the recovered waste heat is mixed with the hot air.

[0032] In this embodiment, the filter plate 16 is fixed when filtering, and a large amount of dust will be filtered on the filter plate 16 after filtering. The filter plate 16 needs to be cleaned or replaced in time. For this purpose, please refer to Figure 1-Figure 5 In this embodiment, a fixing block 24 is provided on the front side of the filter box 12, and a fixing bolt 25 is provided inside the fixing block 24. The fixing bolt 25 passes through the fixing block 24 and is provided with a nut at one end. A handle 26 is provided on the outside of the filter plate 16. In this embodiment, in order to better fix or remove the filter plate 16, after filtering, the nut at one end of the fixing bolt 25 on the fixing block 24 is unscrewed, the fixing bolt 25 is pulled out of the fixing block 24, and the filter plate 16 is pulled out of the filter box 12 for cleaning or replacement using the handle 26 connected to one end of the filter plate 16. Frequent replacement of the filter plate 16 can effectively improve the filtration of dust in the recovered hot air and improve the filtering effect.

[0033] While the present invention has been described above with reference to specific embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as no structural conflicts exist, the various features of the embodiments disclosed herein may be combined with one another in any manner, and the omission of an exhaustive description of these combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A waste heat recovery gas hot air furnace, characterized in that: include: A furnace body (1), a fan (2) is arranged on the right side of the furnace body (1), a charging port (3) is arranged on the upper side of the furnace body (1), a combustion chamber (4) is arranged inside the furnace body (1), a first ventilation pipe (5) is arranged on the left side of the combustion chamber (4), a heat mixing chamber (6) is arranged at the other end of the first ventilation pipe (5), a second ventilation pipe (8) is connected to the upper side of the heat mixing chamber (6), and a drying box (9) is connected to the other end of the second ventilation pipe (8); The filter assembly comprises a third ventilation pipe (10) arranged on the right side of the drying box (9), the other end of the third ventilation pipe (10) being connected to a filter box (12), a fourth ventilation pipe (11) being arranged on the left side of the filter box (12), the other end of the fourth ventilation pipe (11) being connected to a heat mixing chamber (6), a front cover (13) being arranged on the front side of the filter box (12), a limit block (14) being arranged on the inside of the filter box (12), a limit groove being arranged on the outside of the limit block (14), a fixing plate (15) being arranged between the fixing plates (14), and a filter plate (16) being arranged between the upper and lower fixing plates (15).

2. The waste heat recovery gas hot air furnace according to claim 1, characterized in that: A base (17) is provided on the lower side of the fan (2), and the base (17) is connected to the right side of the furnace body (1).

3. The waste heat recovery gas hot air furnace according to claim 2, characterized in that: The front side of the furnace body (1) is provided with a heat dissipation hole (18), and the front side of the furnace body (1) is provided with a hatch (19).

4. The waste heat recovery gas hot air furnace according to claim 3, characterized in that: A first air pump (20) is arranged outside the second ventilation pipe (8), and a second air pump (21) is arranged outside the third ventilation pipe (10).

5. The waste heat recovery gas hot air stove according to claim 4, characterized in that: A motor (7) is provided on the upper side of the heat mixing chamber (6).

6. The waste heat recovery gas hot air furnace according to claim 5, characterized in that: A rotating rod (22) is arranged inside the heat mixing chamber (6), the rotating rod (22) passes through the heat mixing chamber (6) and is connected to the power output end of the motor (7), and blades (23) are arranged outside the rotating rod (22).

7. The waste heat recovery gas hot air furnace according to claim 6, characterized in that: A fixing block (24) is arranged at the front side of the filter box (12), a fixing bolt (25) is arranged inside the fixing block (24), and the fixing bolt (25) passes through the fixing block (24) and a nut is arranged at one end.

8. The waste heat recovery gas hot air furnace according to claim 7, characterized in that: A handle (26) is provided on the outside of the filter plate (16).

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