Gas mixing heater

Abstract

The utility model relates to a kind of gas mixing heater. Gas pipeline is coaxially sequentially provided with bushing mixer, diffuser, heating module and converger along airflow direction, bushing mixer includes mutually nested inner ring cavity and outer ring cavity, second inlet is communicated with outer ring cavity, inner ring cavity and outer ring cavity are communicated by connecting pipe, the inner layer wall middle of inner ring cavity constitutes central passage, the annular space between inner ring cavity and outer ring cavity constitutes central annular passage, first inlet is simultaneously communicated with central passage and central annular passage, and mixing hole is arranged on the inner and outer layer wall of inner ring cavity and the inner layer wall of outer ring cavity, annular heating cavity is enclosed between diffuser and gas pipeline, heating module includes spiral heating pipe arranged in annular heating cavity, spiral heating pipe is communicated with steam supply system, converger is the horn-like structure with central flow port, and the edge of converger is sealingly connected with the inner wall of gas pipeline. With the advantages of small volume and high mixing efficiency and heating efficiency.

Description

Technical Field

[0001] This utility model relates to a gas mixing heater. Background Technology

[0002] In the chemical industry, it is often necessary to mix and heat two or more gases. Generally, gas mixers and heaters are used to perform the corresponding functions. Conventional gas mixing and heating requires multiple devices, such as mixers and heaters, to achieve this. Typically, the gases to be mixed are heated separately by the heater, and then the heated gases are mixed by the gas mixer, or they are mixed first and then heated. The overall mixing efficiency and heating efficiency are relatively low, and a lot of equipment is required, which takes up a large area. Utility Model Content

[0003] The purpose of this invention is to provide a gas mixing heater that is small in size and has high mixing and heating efficiency. It achieves the function of mixing and heating simultaneously by performing gas mixing in stages and setting heating modules in the two-stage mixing process. Moreover, the mixing efficiency and heating efficiency are both relatively high.

[0004] The technical solution of this utility model is as follows: The gas mixing heater includes a gas pipeline. A sleeve mixer, a diffuser, a heating module, and a converging device are arranged coaxially along the airflow direction inside the gas pipeline. The sleeve mixer includes a first inlet and an outlet arranged axially, and a second inlet arranged radially. The sleeve mixer includes an inner ring cavity and an outer ring cavity that are nested together. The second inlet is connected to the outer ring cavity. The inner ring cavity and the outer ring cavity are connected by a connecting pipe. The inner wall of the inner ring cavity forms a central channel. The annular space between the inner ring cavity and the outer ring cavity forms a central annular channel. The first inlet is connected to both the central channel and the central annular channel. Mixing holes are provided on the inner and outer walls of the inner ring cavity and on the inner wall of the outer ring cavity. The diffuser and the gas pipeline form an annular heating cavity. The heating module includes a spiral heating tube disposed in the annular heating cavity. The spiral heating tube is connected to a steam supply system. The converging device is a trumpet-shaped structure with a central confluence port. The opening of the trumpet-shaped structure is positioned to face the airflow. The edge of the converging device is sealed to the inner wall of the gas pipeline.

[0005] Based on the above scheme, the following improvements are made: the diffuser is a cylindrical structure with a cone at one end facing the airflow, and the cone is connected and fixed to the gas pipe by at least two circumferentially distributed connecting rods.

[0006] Based on the above scheme, the following improvements are made: there are two connecting pipes, which are coaxially arranged and located on both sides of the inner ring cavity.

[0007] Based on the above scheme, the following improvements are made: the axis of the second inlet is set perpendicular to the axis of the connecting pipe.

[0008] Based on the above scheme, the following improvements are made: the cross-sections of the inner and outer annular cavities are rectangular.

[0009] Based on the above scheme, the following improvements are made: the spiral heating tube is in the shape of a conical spiral.

[0010] The beneficial effects of this utility model are as follows: In use, the gas mixing heater of this application uses a gas pipeline as the basic pipeline for gas mixing and heating. A sleeve mixer, diffuser, heating module, and converging device are sequentially arranged. The main gas flow (which can be a mixed gas flow) enters from the first inlet of the sleeve mixer, and the secondary gas flow (which can also be a mixed gas flow) enters from the second inlet. The main gas flow enters both the central channel and the central annular channel, while the secondary gas flow first enters the outer annular cavity and then the inner annular cavity. During this process, it enters the central channel and the central annular channel radially through mixing holes, achieving mixing of the two gases. Due to the large number of mixing holes with different orientations and positions, the mixing is very uniform, avoiding… To avoid forming vortices in a predetermined flow direction, the mixed gas flow from the outlet then contacts the diffuser. All gas is diffused into an annular heating chamber near the inner wall of the gas pipe. The heating module in the annular heating chamber efficiently heats the gas flow, avoiding the problem of low heating efficiency due to insufficient contact with the heating module in the central area of ​​the gas pipe. The gas then passes through a converging device, causing it to converge further towards the center, resulting in more uniform mixing and heat distribution. The diffuser and converging device constitute the second-stage mixer, primarily achieving radial cross-flow mixing of the gas and further enhancing uniformity through variations in gas velocity and pressure. Moreover, by placing the heating module within the second-stage mixer, the two-stage mixer and heating module form a single unit, resulting in a smaller size and higher mixing and heat exchange efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the internal structure of a specific embodiment of the gas mixing heater of this utility model; Figure 2 This is an axial sectional view of the casing mixer; Figure 3 This is a radial sectional view of the casing mixer; In the diagram: 1-Gas pipe, 2-Casing mixer, 21-First inlet, 22-Second inlet, 23-Outlet, 24-Inner annular cavity, 25-Outer annular cavity, 26-Connecting pipe, 27-Central channel, 28-Central annular channel, 29-Mixing hole, 3-Diffuser, 31-Annular heating chamber, 32-Cone, 33-Connecting rod, 4-Heating module, 41-Spiral heating tube, 5-Converger, 51-Opening. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0013] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0014] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0015] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0016] A specific embodiment of the gas mixing heater of this utility model is as follows: Figure 1-3As shown, the gas mixing heater includes a gas pipeline 1. A sleeve mixer 2, a diffuser 3, a heating module 4, and a converging device 5 are sequentially and coaxially arranged within the gas pipeline 1 along the airflow direction. The sleeve mixer 2 includes an axially arranged first inlet 21 and outlet 23, and a radially arranged second inlet 22. The sleeve mixer 2 includes an inner annular cavity 24 and an outer annular cavity 25 nested together. The second inlet 22 communicates with the outer annular cavity 25. The inner annular cavity 24 and the outer annular cavity 25 are connected by a connecting pipe 26. A central channel 27 is formed in the middle of the inner wall of the inner annular cavity 24. The annular space between the inner annular cavity 24 and the outer annular cavity 25... The space forms a central annular channel 28. The first inlet 21 is connected to both the central channel 27 and the central annular channel 28. Mixing holes 29 are provided on the inner and outer walls of the inner annular cavity 24 and the inner wall of the outer annular cavity 25. The diffuser 3 and the gas pipe 1 form an annular heating cavity 31. The heating module 4 includes a spiral heating tube 41 located in the annular heating cavity 31. The spiral heating tube 41 is connected to the steam supply system. The converging device 5 is a funnel-shaped structure with a central confluence port. The opening 51 of the funnel-shaped structure is set to face the airflow. The edge of the converging device 5 is sealed to the inner wall of the gas pipe 1.

[0017] The diffuser 3 is a cylindrical structure with a cone-shaped head 32 at the end facing the airflow. The cone-shaped head 32 is connected and fixed to the gas pipe 1 by at least two circumferentially distributed connecting rods 33. There are two connecting pipes 26, which are coaxially arranged and located on both sides of the inner annular cavity 24. The axis of the second inlet 22 is perpendicular to the axis of the connecting pipes 26. The cross-sections of the inner annular cavity 24 and the outer annular cavity 25 are rectangular. In other embodiments, the spiral heating tube 41 may also be conical spiral in shape.

[0018] In operation, the gas mixing heater uses gas pipeline 1 as the basic pipeline for gas mixing and heating. A sleeve mixer 2, diffuser 3, heating module 4, and converging device 5 are sequentially installed. The main gas flow (which can be a mixed gas flow) enters from the first inlet 21 of the sleeve mixer 2, while the secondary gas flow (also a mixed gas flow) enters from the second inlet 22. The main gas flow enters both the central channel 27 and the central annular channel 28, while the secondary gas flow first enters the outer annular cavity 25 and then the inner annular cavity 24. During this process, it enters the central channel 27 and the central annular channel 28 radially through mixing holes 29, achieving mixing of the two gases. Due to the large number of mixing holes 29 and their different orientations and positions, the mixing is very uniform, avoiding... A vortex is formed with a predetermined flow direction. Subsequently, the mixed airflow flowing out from outlet 23 comes into contact with diffuser 3. All of the airflow is diffused by diffuser 3 into the annular heating chamber 31 near the inner wall of gas pipe 1. The heating module 4 installed in the annular heating chamber 31 can efficiently heat the airflow, avoiding the problem of low heating efficiency due to the central area of ​​gas pipe 1 not being able to contact the heating module 4. Then, the airflow is further converged by converging device 5, causing the airflow to converge further towards the center, making the airflow more mixed. This not only makes the airflow more uniform, but also makes the heat of the mixed airflow more uniform. Diffuser 3 and converging device 5 constitute the second-stage mixer, which mainly realizes the radial cross-flow mixing of the airflow and makes the airflow more uniform by changing the airflow velocity and pressure. Moreover, since the heating module 4 is placed in the second-stage mixer, the two-stage mixer and the heating module 4 are integrated into one unit, which is smaller in size and has higher mixing efficiency and heat exchange efficiency.

[0019] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A gas mixing heater, comprising a gas pipeline, characterized in that, A sleeve mixer, diffuser, heating module, and converging device are sequentially and coaxially arranged along the airflow direction inside the gas pipeline. The sleeve mixer includes a first inlet and an outlet arranged axially, and a second inlet arranged radially. The sleeve mixer includes an inner ring cavity and an outer ring cavity that are nested together. The second inlet communicates with the outer ring cavity. The inner ring cavity and the outer ring cavity are connected by a connecting pipe. The middle of the inner wall of the inner ring cavity forms a central channel. The annular space between the inner ring cavity and the outer ring cavity forms a central annular channel. The first inlet communicates with both the central channel and the central annular channel. Mixing holes are provided on the inner and outer walls of the inner ring cavity and on the inner wall of the outer ring cavity. The diffuser and the gas pipeline form an annular heating cavity. The heating module includes a spiral heating tube located in the annular heating cavity. The spiral heating tube is connected to a steam supply system. The converging device is a funnel-shaped structure with a central confluence port. The opening of the funnel-shaped structure faces the airflow. The edge of the converging device is sealed to the inner wall of the gas pipeline.

2. A gas mixing heater according to claim 1, characterized in that, The diffuser is a cylindrical structure with a cone-shaped head at one end facing the airflow. The cone-shaped head is connected and fixed to the gas pipe by at least two circumferentially distributed connecting rods.

3. A gas mixing heater according to claim 1, characterized in that, There are two connecting pipes, which are coaxially arranged and located on both sides of the inner annular cavity.

4. A gas mixing heater according to claim 3, characterized in that, The axis of the second inlet is set perpendicular to the axis of the connecting pipe.

5. A gas mixing heater according to claim 1, characterized in that, The cross-sections of the inner and outer annular cavities are rectangular.

6. A gas mixing heater according to claim 1, characterized in that, The spiral heating tube is conical spiral in shape.

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