Air mixing chamber structure

Abstract

The utility model relates to an air mixing chamber structure, which comprises a shell, an air mixing chamber, an air inlet and an air outlet, the shell is provided with a first channel, a second channel and a third channel which are communicated with the gas chamber; the first channel is used for introducing first gas into the gas chamber; the second channel is used for introducing second gas into the gas chamber; and the third channel is used for discharging the mixed gas in the gas chamber. The first channel is connected with the reformer, the second channel is connected with the heating furnace, high-temperature hydrogen-rich coal gas generated by the reformer and high-temperature circulating coal gas generated by the heating furnace are introduced into the gas chamber, and the two gases have enough time and space to be mutually diffused and mixed in the gas chamber through a mixed air buffer area formed by the shell and used for mixing the gases; according to the gas mixing device, turbulent flow and vortex of gas in the mixing process can be reduced, so that more uniform mixing is promoted, the mixed reducing gas is discharged through the third channel, and the output reducing gas meets the process requirements of a hydrogen-based shaft furnace direct reduction technology.

Description

Technical Field

[0001] This utility model relates to the field of high temperature and high pressure gas mixing technology, and in particular to a mixing chamber structure. Background Technology

[0002] Hydrogen-based shaft furnaces, as a typical direct reduction iron (DRI) technology, have attracted much attention. The circulating gas process in hydrogen-based shaft furnaces involves two industrial furnaces: a reformer and a heating furnace. The reducing gas produced by mixing high-temperature hydrogen-rich gas from the reformer with high-temperature circulating gas heated by the heating furnace is a necessary and sufficient condition for the production of sponge-like DRI in hydrogen-based shaft furnaces.

[0003] Currently, in existing industrial applications, when mixing high-temperature gases with different compositions and temperatures, it is impossible to achieve a uniform temperature and mass mixing effect for reducing gases, which fails to meet process requirements and results in uneven mixing of temperature and composition. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a mixing chamber structure to solve the problem that in existing industrial applications, when mixing high-temperature gases of different compositions and temperatures, it is impossible to achieve a uniform temperature and mass mixing effect of reducing gas, which fails to meet process requirements and results in uneven mixing of temperature and composition.

[0005] To achieve the above and other related objectives, this utility model provides a mixing chamber structure, comprising:

[0006] A housing that forms a gas chamber for mixing gases;

[0007] A first channel is provided on the housing and communicates with the gas chamber. The first channel is used to introduce a first gas into the gas chamber.

[0008] A second channel is provided on the housing and communicates with the gas chamber. The second channel is used to introduce a second gas into the gas chamber.

[0009] A third channel is provided on the housing and communicates with the gas chamber. The third channel is used to discharge the mixture of the first gas and the second gas from the gas chamber.

[0010] Optionally, the housing comprises, from the inside out, a working layer, a heat insulation layer, and an outer shell, with the working layer enclosing the gas chamber.

[0011] Optionally, the working layer and the insulation layer are respectively provided with vertically staggered expansion joints.

[0012] Optionally, the working layer, the heat insulation layer, and the outer shell are all polyhedral structures.

[0013] Optionally, the working layer, the heat insulation layer, and the outer shell are all spherical structures.

[0014] Optionally, the axes of the first channel, the second channel, and the third channel pass through the center point of the housing.

[0015] Optionally, the axes of the first channel, the second channel, and the third channel are perpendicular to each other.

[0016] Optionally, the axes of the first channel, the second channel, and the third channel are located in the same plane.

[0017] Optionally, the included angle α between each pair of the axes of the first channel, the second channel, and the third channel is 120°.

[0018] Optionally, the working layer is made of high-aluminum material, and the outer shell is made of steel.

[0019] As described above, this utility model has the following beneficial effects: the first channel connects to the converter and the second channel connects to the heater, allowing the high-temperature hydrogen-rich coal gas generated by the converter and the high-temperature circulating coal gas generated by the heater to be introduced into the gas chamber inside the shell. Through the mixing buffer formed by the shell for mixing the gas, the two gases have sufficient time and space to diffuse and mix with each other in the gas chamber, which helps to reduce turbulence and eddies in the gas mixing process, thereby promoting more uniform mixing. The reduced gas after uniform temperature and mass mixing is discharged through the third channel, and the output reduced gas meets the process requirements of the hydrogen-based vertical shaft furnace direct reduction technology. Attached Figure Description

[0020] Figure 1 The diagram shows a partial cross-sectional view of a mixing chamber structure with mutually perpendicular axes, as illustrated in an embodiment of this application.

[0021] Figure 2 The diagram shown is a half-section of a mixing chamber structure with mutually perpendicular axes, as illustrated in an embodiment of this application.

[0022] Figure 3 The diagram shown is a schematic of a mixing chamber structure with its axes located in the same plane, as illustrated in an embodiment of this application.

[0023] Explanation of reference numerals in the attached figures

[0024] Shell 1, gas chamber 101, working layer 102, heat insulation layer 103, outer shell 104, first channel 2, second channel 3, third channel 4. Detailed Implementation

[0025] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0026] Please see Figures 1 to 3 It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show components relevant to this utility model and are not drawn according to the actual number, shape, and size of the components in implementation. In actual implementation, the form, quantity, and proportion of each component can be arbitrarily changed, and the component layout may be more complex. The structures, proportions, and sizes shown in the accompanying drawings are only for illustrative purposes and to assist those skilled in the art in understanding and reading the content disclosed in the specification. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0027] Before describing the embodiments of this utility model in detail, the application environment of this utility model will be described first. The technology of this utility model is mainly applied to the field of high-temperature and high-pressure gas mixing technology. This utility model is used to solve the problem that in existing industrial applications, when mixing high-temperature gases of different compositions and temperatures, it is impossible to achieve a uniform temperature and mass mixing effect for reducing gases, which fails to meet process requirements and results in uneven mixing of temperature and components.

[0028] Please combine Figures 1 to 3 As shown, this utility model provides a mixing chamber structure.

[0029] In an exemplary embodiment of this application, the mixing chamber structure includes: a housing 1, which forms a gas chamber 101 for mixing gases; a first channel 2, disposed on the housing 1 and communicating with the gas chamber 101, which is used to introduce a first gas into the gas chamber 101; a second channel 3, disposed on the housing 1 and communicating with the gas chamber 101, which is used to introduce a second gas into the gas chamber 101; and a third channel 4, disposed on the housing 1 and communicating with the gas chamber 101, which is used to discharge the mixture of the first gas and the second gas from the gas chamber 101.

[0030] In this embodiment, the first channel 2 connects to the converter and the second channel 3 connects to the heater. The high-temperature hydrogen-rich coal gas generated by the converter and the high-temperature circulating coal gas generated by the heater are introduced into the gas chamber 101 inside the shell 1. Through the mixing buffer formed by the shell 1, the two gases have sufficient time and space to diffuse and mix with each other in the gas chamber 101, which helps to reduce turbulence and eddies in the mixing process, thereby promoting more uniform mixing. The reduced gas after uniform temperature and mass mixing is discharged through the third channel 4. The output reduced gas meets the process requirements of the hydrogen-based vertical shaft furnace direct reduction technology.

[0031] In an exemplary embodiment of this application, the housing 1 includes, from the inside out, a working layer 102, a heat insulation layer 103, and an outer shell 104, with the working layer 102 enclosing a gas chamber 101.

[0032] In this embodiment, the working layer 102 is the core component of the mixing chamber structure, forming the gas chamber 101 and directly contacting the high-temperature, high-pressure gas. The design and material selection of the working layer 102 must meet the operational requirements of the mixing chamber, including high-temperature resistance, high-pressure resistance, and corrosion resistance, to ensure the normal operation and long-term stability of the mixing chamber. The insulation layer 103 is located between the working layer 102 and the outer shell 104, primarily reducing heat transfer and isolating the high temperature of the working layer 102 from the outer shell 104. The insulation layer 103 can be made of a material with low thermal conductivity to prevent heat conduction to the outside of the mixing chamber structure. The outer shell 104 is the outermost layer of the mixing chamber structure, primarily protecting the internal structure and materials of the mixing chamber from damage by the external environment. The outer shell 104 needs to have sufficient strength and rigidity to withstand the effects of harsh conditions such as high temperature and high pressure.

[0033] In an exemplary embodiment of this application, the working layer 102 and the heat insulation layer 103 are respectively provided with vertically intersecting expansion joints.

[0034] In this embodiment, by setting vertically intersecting expansion joints on the working layer 102 and the insulation layer 103 respectively, the insulation layer 103 expands under high temperature during the operation of the mixing chamber structure. By setting expansion joints, the insulation layer 103 can expand freely when heated, avoiding damage to the structure of the insulation layer 103 caused by the stress generated by the expansion. This helps to maintain the integrity and stability of the insulation layer 103 structure and extend its service life.

[0035] In an exemplary embodiment of this application, the working layer 102, the heat insulation layer 103, and the outer shell 104 are all polyhedral structures.

[0036] In this embodiment, the polyhedral structure is composed of multiple planar polygons that support each other structurally, forming a stable three-dimensional frame. Under high temperature and pressure conditions, the polyhedral structure maintains good stability and load-bearing capacity, and is not easily deformed or damaged. The polyhedral structure makes full use of space; through reasonable layout and combination, it achieves efficient internal space utilization. In the structural design of the mixing chamber, the polyhedral structure makes the internal space more compact, which is beneficial for gas mixing and flow. The heat insulation layer 103 of the polyhedral structure can effectively control heat conduction, reducing heat loss and the impact of heat on the external structure.

[0037] In an exemplary embodiment of this application, the working layer 102, the heat insulation layer 103, and the outer shell 104 are all spherical structures.

[0038] In this embodiment, the spherical structure is uniform in all directions. Under high temperature and high pressure environments, the spherical structure can more effectively resist the influence of internal pressure and external forces, ensuring the long-term safe operation of the mixing chamber. When heated, the spherical structure has a relatively uniform distribution of thermal stress, reducing stress concentration and deformation caused by temperature changes, which helps extend the service life of the mixing chamber and maintain its good working performance. The spherical structure has the largest volume-to-surface area ratio, making full use of the internal space of the mixing chamber, while reducing the amount of outer shell 104 material and insulation material used, thus reducing costs. The spherical structure has less obstruction to airflow, which is conducive to uniform gas mixing and flow, helping to improve the mixing efficiency and gas distribution uniformity of the mixing chamber.

[0039] In an exemplary embodiment of this application, the axes of the first channel 2, the second channel 3 and the third channel 4 pass through the center point of the housing 1.

[0040] In this embodiment, when the axes of the first channel 2, the second channel 3, and the third channel 4 all pass through the center point, the gas entering the mixing chamber from the first channel 2 and the second channel 3 will flow radially along the center of the sphere. This helps the gas to be evenly distributed and mixed within the mixing chamber. It avoids the problems of uneven gas flow and insufficient mixing caused by the channel positions being off-center. It also reduces the generation of unfavorable flow phenomena such as eddies and turbulence, thus lowering energy consumption and noise.

[0041] In an exemplary embodiment of this application, the axes of the first channel 2, the second channel 3 and the third channel 4 are perpendicular to each other.

[0042] In this embodiment, the axis of the first channel 2 is perpendicular to the axes of the second channel 3 and the third channel 4, and the axis of the second channel 3 is perpendicular to the axis of the third channel 4; the axes of the first channel 2 and the second channel 3 are located in the same plane, the axes of the first channel 2 and the third channel 4 are located in the same plane, and the axes of the second channel 3 and the third channel 4 are located in the same plane.

[0043] In an exemplary embodiment of this application, the axes of the first channel 2, the second channel 3, and the third channel 4 are located in the same plane.

[0044] In this embodiment, the axes of the first channel 2, the second channel 3, and the third channel 4 are located in the same plane, which helps to reduce eddies and turbulence in the gas chamber 101. The axes of the first channel 2, the second channel 3, and the third channel 4 pass through the center point of the housing 1 and are located in the same plane, making the overall structure of the mixing chamber more symmetrical and balanced. This allows the mixing chamber structure to more effectively resist the influence of internal pressure and external forces under high temperature and high pressure environments, thereby enhancing the stability of the mixing chamber structure.

[0045] In an exemplary embodiment of this application, the included angle α between each pair of the axes of the first channel 2, the second channel 3 and the third channel 4 is 120°.

[0046] In this embodiment, the axes of the first channel 2, the second channel 3 and the third channel 4 are located in the same plane, and the included angle α between each pair is 120°.

[0047] In yet another exemplary embodiment, the axes of the first channel 2, the second channel 3 and the third channel 4 are located in the same plane, and the included angle α between each pair is 90°.

[0048] In an exemplary embodiment of this application, the working layer 102 is a high-aluminum working layer 102, and the outer shell 104 is a steel outer shell 104.

[0049] In this embodiment, the working layer 102 includes, but is not limited to, high-alumina bricks, high-alumina castables, etc.; the heat insulation layer 103 includes, but is not limited to, lightweight bricks, lightweight castables, ceramic fiber cotton, heat insulation nanoplates, ceramic fiber blocks, etc.

[0050] The working principle is as follows: the first channel 2 connects to the converter and the second channel 3 connects to the heater. The high-temperature hydrogen-rich coal gas generated by the converter and the high-temperature circulating coal gas generated by the heater are introduced into the gas chamber 101 inside the shell 1. Through the mixing buffer formed by the shell 1, the two gases have enough time and space to diffuse and mix with each other in the gas chamber 101, which helps to reduce turbulence and eddies in the mixing process, thereby promoting more uniform mixing. The reduced gas after uniform temperature and mass mixing is discharged through the third channel 4. The output reduced gas meets the process requirements of the hydrogen-based vertical shaft furnace direct reduction technology.

[0051] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A mixing chamber structure, characterized in that, include: A housing that forms a gas chamber for mixing gases; A first channel is provided on the housing and communicates with the gas chamber. The first channel is used to introduce a first gas into the gas chamber. A second channel is provided on the housing and communicates with the gas chamber. The second channel is used to introduce a second gas into the gas chamber. A third channel is provided on the housing and communicates with the gas chamber. The third channel is used to discharge the mixture of the first gas and the second gas from the gas chamber.

2. The mixing chamber structure according to claim 1, characterized in that: The housing comprises, from the inside out, a working layer, a heat insulation layer, and an outer shell, with the working layer enclosing and forming the gas chamber.

3. The mixing chamber structure according to claim 2, characterized in that: The working layer and the insulation layer are respectively provided with vertically intersecting expansion joints.

4. The mixing chamber structure according to claim 2, characterized in that: The working layer, the heat insulation layer, and the outer shell are all polyhedral structures.

5. The mixing chamber structure according to claim 4, characterized in that: The working layer, the heat insulation layer, and the outer shell are all spherical structures.

6. The mixing chamber structure according to claim 1, characterized in that: The axes of the first channel, the second channel, and the third channel pass through the center point of the housing.

7. The mixing chamber structure according to claim 6, characterized in that: The axes of the first channel, the second channel, and the third channel are perpendicular to each other.

8. The mixing chamber structure according to claim 6, characterized in that: The axes of the first channel, the second channel, and the third channel are located in the same plane.

9. The mixing chamber structure according to claim 8, characterized in that: The included angle α between each pair of the axes of the first channel, the second channel and the third channel is 120°.

10. The mixing chamber structure according to claim 2, characterized in that: The working layer is made of high-aluminum material, and the outer shell is made of steel.

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