Steam ejector and steam heating pipe thereof

Abstract

The utility model relates to the technical field of heating devices, and discloses a steam ejector and a steam heating pipe thereof, the steam ejector comprises a shell, a plurality of steam-liquid mixing pipes and a plurality of steam ejection pipes, a steam channel and a liquid channel are arranged in the shell, one end of the steam channel is communicated with the steam ejection pipes, and the other end of the steam channel is communicated with an external steam supply pipeline. One end of the liquid channel is communicated with the vapor-liquid mixing pipe, and the other end of the liquid channel is communicated with the inner cavity of the external container. By adopting a coaxial and same-direction double-layer sleeve structure of a liquid channel and a steam channel, a jet flow structure of a steam jet pipe and a steam-liquid mixing pipe and a straight cylindrical structure of the steam-liquid mixing pipe, to-be-heated liquid enters from the rear part of the liquid channel, so that the problems that the liquid cannot be effectively stirred after steam heating and silencing treatment, the heat cannot be dispersed, and the heating effect is poor are solved. The heating efficiency is low, and stirring or large material circulation must be added to eliminate a dead zone.

Description

Technical Field

[0001] This utility model relates to the field of heating device technology, and in particular to a steam ejector and its steam heating tube. Background Technology

[0002] Currently, liquid heating technology mainly employs two methods: indirect heating via heat exchangers and direct heating by directly mixing steam and liquid. Heat exchanger heating requires specialized heat exchange equipment, which occupies a large area, is expensive, has complex design, and incurs high maintenance costs.

[0003] Direct heating, which involves directly introducing steam into a liquid for heating, offers advantages such as simple structure, small footprint, and rapid heating. However, this method suffers from noise and vibration issues, affecting the stability and lifespan of the equipment.

[0004] Existing technologies mainly use steam dispersion through multiple small holes to reduce noise and vibration. However, this causes the steam to lose most of its kinetic energy, making it unable to agitate the liquid to be heated, resulting in low heat exchange efficiency. Therefore, it is necessary to add circulating agitation equipment to improve heating efficiency. Utility Model Content

[0005] To address the aforementioned shortcomings, the purpose of this invention is to propose a steam ejector and its steam heating tube, which has a simple structure, is easy to process and clean, and while reducing the noise and vibration generated by direct steam heating of liquids, it has a good liquid agitation effect and improves the overall heating efficiency.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A steam ejector includes a housing, a plurality of vapor-liquid mixing pipes, and a plurality of steam injection pipes. The housing is provided with a steam passage and a liquid passage. One end of the steam passage is connected to the steam injection pipe, and the other end of the steam passage is connected to an external steam supply pipe. One end of the liquid passage is connected to the vapor-liquid mixing pipe, and the other end of the liquid passage is connected to the inner cavity of an external container.

[0008] The vapor-liquid mixing pipe has a straight cylindrical structure. The number of vapor-liquid mixing pipes and the number of steam injection pipes are the same, and they are paired together in a one-to-one correspondence. The grouped vapor-liquid mixing pipes and steam injection pipes are coaxially arranged along the steam input direction. The outer diameter of the steam injection pipe is smaller than the inner diameter of the vapor-liquid mixing pipe. The steam injection pipe partially extends into the vapor-liquid mixing pipe. The grouped steam injection pipes and vapor-liquid mixing pipes are combined to form a jet structure.

[0009] The steam passage is funnel-shaped, and the diameter of one end of the steam passage connected to the steam injection pipe is 1.25 to 2.5 times the diameter of the other end.

[0010] The liquid channel and the steam channel are arranged coaxially and in the same direction. The projection of the liquid channel along the steam input direction completely covers the steam channel, and the liquid channel and the steam channel form a double-layer sleeve structure.

[0011] Preferably, the steam injection pipe is a straight cylindrical shape.

[0012] Preferably, the steam injection pipe is conical in shape, and its diameter gradually increases along the steam flow direction.

[0013] Preferably, the cone-shaped taper angle of the steam passage is 0 to 30°.

[0014] Preferably, the diameter of the inlet of the steam jet pipe is greater than or equal to 5 mm and less than or equal to the diameter of its outlet, and the diameter of the outlet of the steam jet pipe is less than or equal to 15 mm.

[0015] Preferably, the diameter of the vapor-liquid mixing pipe is twice the inlet diameter of the steam injection pipe.

[0016] Preferably, the steam injection pipe is a straight cylindrical shape, the diameter of the steam injection pipe is 10 mm, and the diameter of the vapor-liquid mixing pipe is 20 mm.

[0017] Depending on the steam flow rate, the diameters at both ends of the funnel-shaped steam passage are:

[0018] Inlet diameter DN80, outlet diameter DN100, steam flow rate 2t / h;

[0019] Inlet end DN60, outlet end DN100, steam flow rate 2t / h;

[0020] Inlet end DN50, outlet end DN100, steam flow rate 2t / h;

[0021] Inlet diameter DN40, outlet diameter DN80, steam flow rate 1.6t / h;

[0022] Inlet end DN32, outlet end DN60, steam flow rate 1.2t / h.

[0023] Preferably, the housing includes a connecting flange, a first housing, and a second housing. The connecting flange is used to connect the first housing and the second housing. The steam injection pipe is connected to the first housing, the vapor-liquid mixing pipe is connected to the second housing, and the liquid channel is located between the first housing and the second housing.

[0024] A steam heating pipe includes a closed pipe body and a plurality of steam ejectors as described above. The pipe body is provided with a liquid inlet, a liquid outlet and a plurality of steam inlets. The steam ejectors are disposed on the inner wall of the pipe body. The plurality of steam ejectors are spaced apart along the length of the pipe body. An external steam supply pipe is connected to the steam ejectors through the steam inlets. The liquid inlets are used to introduce the liquid to be heated, and the liquid outlets are used to discharge the heated liquid.

[0025] The technical solution provided by this utility model can include the following beneficial effects:

[0026] By adopting a funnel-shaped steam channel, steam is slowly diverted while being guided into the steam injection pipe, reducing vibration caused by steam impact, reducing noise, and solving the problem of significant steam power loss.

[0027] By employing a coaxial, unidirectional double-layered sleeve structure for the liquid and steam channels, a jet structure for the steam jet pipe and the vapor-liquid mixing pipe, and a straight cylindrical structure for the vapor-liquid mixing pipe, the flow directions of steam and liquid are ensured to be consistent. The impact force of the steam provides the driving force for medium mixing, resulting in a good stirring effect, allowing heat to be dispersed and mixed uniformly in the shortest possible time. The liquid to be heated enters from the rear of the liquid channel, creating a large mixing area in the external container, resulting in good mixing and easily eliminating circulation dead zones in the external container. Through the rational arrangement of the steam jets, the circulation formed by the steam jets ensures the mixing effect and avoids temperature stratification of the liquid to be heated. Simultaneously, the steam follows the overall flow of the liquid to be heated, preventing arbitrary steam diffusion and the generation of noise and vibration from impacting the tank. This solves the problem of ineffective liquid agitation, poor heat dispersion, and low heating efficiency after steam heating and silencing treatment, which necessitates increased stirring or large-scale material circulation to eliminate dead zones.

[0028] The steam jet pipe adopts a straight cylindrical shape, which facilitates the guidance of steam jet direction and promotes the liquid to be heated to form an effective stirring effect. At the same time, the steam jet pipe can be directly welded to the outer shell as a round tube, which is simple to process.

[0029] The conical structure of the steam jet pipe further reduces the noise and vibration generated during the mixing of steam and liquid. The direction of liquid propulsion is guided by the straight cylindrical structure of the vapor-liquid mixing pipe outside the steam jet pipe.

[0030] When the liquid to be heated is prone to clogging the pipes, the outer casing adopts a split structure that is easy to disassemble and clean. By opening the connecting flange, the first and second outer casings can be separated, and the part of the steam ejector that comes into contact with the liquid can be cleaned directly.

[0031] By using steam jet pipes instead of conventional tank heating, the heat exchange efficiency is greatly improved due to the agitation effect of the steam jets. The liquid is rapidly heated after passing through the steam heating pipes, changing from conventional tank heating to pipeline-based online heating, which significantly reduces the footprint and cost. At the same time, the noise is extremely low and the vibration is minimal. Attached Figure Description

[0032] Figure 1 This is a cross-sectional view of one embodiment of the present invention.

[0033] Figure 2 This is a three-dimensional structural diagram of one embodiment of the present invention.

[0034] Figure 3 This is a three-dimensional structural diagram of one embodiment of the present invention.

[0035] Figure 4 This is a schematic diagram of the structure of one embodiment of the present invention.

[0036] Figure 5 This is a cross-sectional view of another embodiment of the present invention.

[0037] Figure 6 This is a three-dimensional structural diagram of another embodiment of the present invention.

[0038] Figure 7 This is a three-dimensional structural diagram of another embodiment of the present invention.

[0039] The components include: outer shell 1, steam channel 101, liquid channel 102, connecting flange 11, mounting flange 12, first outer shell 13, second outer shell 14, vapor-liquid mixing pipe 2, and steam injection pipe 3. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0041] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or emphasis.

[0042] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] The embodiments of this utility model are described below with reference to the accompanying drawings.

[0045] A steam ejector includes a housing 1, a plurality of vapor-liquid mixing pipes 2 and a plurality of steam injection pipes 3. The housing 1 is provided with a steam passage 101 and a liquid passage 102. One end of the steam passage 101 is connected to the steam injection pipe 3 and the other end of the steam passage 101 is connected to an external steam supply pipe. One end of the liquid passage 102 is connected to the vapor-liquid mixing pipe 2 and the other end of the liquid passage 102 is connected to the inner cavity of an external container.

[0046] The vapor-liquid mixing pipe 2 has a straight cylindrical structure. The number of vapor-liquid mixing pipes 2 and the number of steam injection pipes 3 are the same, and they are paired one-to-one to form a group. The group of vapor-liquid mixing pipes 2 and steam injection pipes 3 are coaxially arranged along the steam input direction. The outer diameter of the steam injection pipe 3 is smaller than the inner diameter of the vapor-liquid mixing pipe 2. The steam injection pipe 3 partially extends into the vapor-liquid mixing pipe 2. The group of steam injection pipes 3 and vapor-liquid mixing pipes 2 are combined to form a jet structure.

[0047] The steam passage 101 is funnel-shaped, and the diameter of one end of the steam passage 101 connected to the steam injection pipe 3 is 1.25 to 2.5 times the diameter of the other end.

[0048] The liquid channel 102 and the steam channel 101 are arranged coaxially and in the same direction. The projection of the liquid channel 102 along the steam input direction completely covers the steam channel 101. The liquid channel 102 and the steam channel 101 form a double-layer sleeve structure.

[0049] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in a specific embodiment, the steam ejector is installed on the inner wall of the outer container, which is used to hold the liquid to be heated and is completely submerged in the liquid. The external steam supply pipe passes through the through hole on the tank and connects to the steam ejector. When the steam ejector is heating, steam enters the steam channel 101 from the external steam supply pipe, is buffered by the funnel-shaped structure of the steam channel 101 and diverted to several steam injection pipes 3, and then is injected into the vapor-liquid mixing pipe 2 along the center of the vapor-liquid mixing pipe 2 through the steam injection pipes 3, and drives the liquid in the vapor-liquid mixing pipe 2 to be ejected together; at the same time, the liquid to be heated is continuously replenished to the vapor-liquid mixing pipe 2 through the liquid channel 102. The cylindrical vapor-liquid mixing pipe 2 guides the liquid to be heated to form a circulating agitation channel, which quickly disperses and conducts the heat brought in by the steam to the liquid to be heated, achieving the effect of agitation heating.

[0050] By adopting a funnel-shaped steam channel 101, steam is slowly diverted while being guided into the steam jet pipe 3, reducing vibration caused by steam impact, reducing noise, and solving the problem of large loss of steam power.

[0051] By employing a coaxial, unidirectional double-layered sleeve structure for the liquid channel 102 and the steam channel 101, a jet structure for the steam jet pipe 3 and the vapor-liquid mixing pipe 2, and a straight cylindrical structure for the vapor-liquid mixing pipe 2, the flow directions of steam and liquid are ensured to be consistent. The impact force of the steam provides the power for medium mixing, resulting in a good stirring effect, allowing heat to be dispersed and mixed evenly in the shortest possible time. The liquid to be heated enters from the rear of the liquid channel, creating a large mixing area in the external container, resulting in good mixing and easily eliminating dead zones in the external container. Through the rational arrangement of the steam jets, the circulation formed by the steam jets ensures the mixing effect and avoids temperature stratification of the liquid to be heated. Simultaneously, the steam follows the overall flow of the liquid to be heated, preventing arbitrary steam diffusion and the generation of noise and vibration from impacting the tank. This solves the problem that after steam heating and silencing treatment, the liquid cannot be effectively stirred, heat cannot be dispersed, heating efficiency is low, and it is necessary to increase stirring or utilize large material circulation to eliminate dead zones.

[0052] Preferably, the steam injection pipe 3 is a straight cylindrical shape.

[0053] The steam jet pipe 3 is a straight cylindrical shape, which facilitates the guidance of the steam jet direction and promotes the liquid to be heated to form an effective stirring effect. At the same time, the steam jet pipe 3 can be directly welded to the outer shell 1 as a round tube, which is simple to process.

[0054] Preferably, the steam injection pipe 3 is conical in shape, and its diameter gradually increases along the steam flow direction.

[0055] With this structure, the conical structure of the steam jet pipe 3 further reduces the noise and vibration generated when steam and liquid are mixed, and the direction of liquid propulsion is guided by the straight cylindrical structure of the vapor-liquid mixing pipe 2 outside the steam jet pipe 3.

[0056] Preferably, the cone-shaped taper angle of the steam channel 101 is 0 to 30°.

[0057] When the taper angle is 0°, the steam channel 101 is a straight cylindrical structure. The smaller the taper angle of the steam channel 101, the stronger the guiding ability of the steam to drive the liquid, and the better the stirring effect of the steam ejector. The larger the taper angle of the steam channel 101, the better the noise reduction effect of the steam ejector. When the taper angle of the steam channel is greater than 30°, the steam kinetic energy loss is too great, and it cannot effectively drive the liquid to form effective stirring.

[0058] Preferably, the diameter of the inlet of the steam jet pipe 3 is greater than or equal to 5 mm and less than or equal to the diameter of its outlet, and the diameter of the outlet of the steam jet pipe 3 is less than or equal to 15 mm.

[0059] When the inlet diameter of steam jet pipe 3 is less than 5mm, the steam kinetic energy loss is too large, and the steam jet cannot achieve an effective liquid agitation effect.

[0060] When the outlet diameter of steam jet pipe 3 is greater than 15mm, the noise and vibration generated by steam impact are too great.

[0061] Preferably, the diameter of the vapor-liquid mixing pipe 2 is twice the inlet diameter of the steam injection pipe 3.

[0062] This structure ensures the continuous flow of the liquid to be heated in the liquid channel 102, and guarantees the overall noise reduction effect of the steam ejector.

[0063] Preferably, the steam injection pipe 3 is a straight cylindrical shape, the diameter of the steam injection pipe 3 is 10 mm, and the diameter of the vapor-liquid mixing pipe 2 is 20 mm.

[0064] With this structure, the steam ejector achieves a relatively ideal level of noise reduction and agitation. By setting multiple sets of steam ejector pipes 3 and vapor-liquid mixing pipes 2, steam ejectors of different sizes can be formed.

[0065] Depending on the steam flow rate, the diameters at both ends of the funnel-shaped steam passage are:

[0066] Inlet diameter DN80, outlet diameter DN100, steam flow rate 2t / h;

[0067] Inlet end DN60, outlet end DN100, steam flow rate 2t / h;

[0068] Inlet end DN50, outlet end DN100, steam flow rate 2t / h;

[0069] Inlet diameter DN40, outlet diameter DN80, steam flow rate 1.6t / h;

[0070] Inlet end DN32, outlet end DN60, steam flow rate 1.2t / h.

[0071] Preferably, the outer casing 1 includes a connecting flange 11, a first outer casing 13 and a second outer casing 14. The connecting flange 11 is used to connect the first outer casing 13 and the second outer casing 14. The steam injection pipe 3 is connected to the first outer casing 13. The vapor-liquid mixing pipe 2 is connected to the second outer casing 14. The liquid channel 102 is located between the first outer casing 13 and the second outer casing 14.

[0072] like Figure 5 , Figure 6 and Figure 7 As shown, when the liquid to be heated is prone to clogging the pipe, the outer shell 1 adopts a split structure that is easy to disassemble and clean. By opening the connecting flange 11, the first outer shell 13 and the second outer shell 14 can be separated, and the part of the steam ejector that is in contact with the liquid can be cleaned directly.

[0073] Specifically, the outer casing 1 also includes a mounting flange 12, which is used to fix the steam ejector to the inner wall of the tank that carries the liquid to be heated.

[0074] A steam heating pipe includes a closed pipe body and a plurality of steam ejectors as described above. The pipe body is provided with a liquid inlet, a liquid outlet and a plurality of steam inlets. The steam ejectors are disposed on the inner wall of the pipe body. The plurality of steam ejectors are spaced apart along the length of the pipe body. An external steam supply pipe is connected to the steam ejectors through the steam inlets. The liquid inlets are used to introduce the liquid to be heated, and the liquid outlets are used to discharge the heated liquid.

[0075] This structure significantly improves heat exchange efficiency due to the agitation effect of the steam ejector. Liquid is rapidly heated after passing through the steam heating pipes, replacing conventional tank heating with online pipeline heating, greatly reducing floor space and cost. Simultaneously, it produces extremely low noise and minimal vibration.

[0076] In a specific embodiment, both the steam heating tube and the steam ejector are made of carbon steel, which has a long service life and requires no maintenance when used for heating liquids that are not prone to scaling.

[0077] Other configurations and operations according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0078] In the description of this specification, references to terms such as "embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0079] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A steam ejector, characterized in that: It includes an outer shell, several vapor-liquid mixing pipes and several steam injection pipes. The outer shell is provided with a steam channel and a liquid channel. One end of the steam channel is connected to the steam injection pipe and the other end of the steam channel is connected to an external steam supply pipe. One end of the liquid channel is connected to the vapor-liquid mixing pipe and the other end of the liquid channel is connected to the inner cavity of an external container. The vapor-liquid mixing tube has a straight cylindrical structure. The number of vapor-liquid mixing tubes and steam injection tubes are the same, and they are paired one-to-one. The group of vapor-liquid mixing tubes and steam injection tubes are coaxially arranged along the steam input direction. The outer diameter of the steam injection tube is smaller than the inner diameter of the vapor-liquid mixing tube. The steam injection tube part extends into the vapor-liquid mixing tube. The group of steam injection tubes and vapor-liquid mixing tubes are combined to form a jet structure. The steam passage is funnel-shaped, and the diameter of one end of the steam passage connected to the steam injection pipe is 1.25 to 2.5 times the diameter of the other end; The liquid channel and the steam channel are arranged coaxially and in the same direction. The projection of the liquid channel along the steam input direction completely covers the steam channel, and the liquid channel and the steam channel form a double-layer sleeve structure.

2. A steam ejector according to claim 1, characterized in that: The steam injection pipe is a straight cylindrical shape.

3. A steam ejector according to claim 1, characterized in that: The steam injection pipe is conical in shape, and its diameter gradually increases along the direction of steam flow.

4. A steam ejector according to claim 3, characterized in that: The cone-shaped steam passage has a taper angle of 0 to 30°.

5. A steam ejector according to claim 1, characterized in that: The diameter of the inlet of the steam jet pipe is greater than or equal to 5 mm and less than or equal to the diameter of its outlet, and the diameter of the outlet of the steam jet pipe is less than or equal to 15 mm.

6. A steam ejector according to claim 1 or 5, characterized in that: The diameter of the vapor-liquid mixing pipe is twice the inlet diameter of the steam injection pipe.

7. A steam ejector according to claim 6, characterized in that: The steam injection pipe is a straight cylindrical shape with a diameter of 10 mm, and the vapor-liquid mixing pipe has a diameter of 20 mm.

8. A steam ejector according to claim 1, characterized in that, Depending on the steam flow rate, the diameters at both ends of the funnel-shaped steam passage are: Inlet diameter DN80, outlet diameter DN100, steam flow rate 2t / h; Inlet end DN60, outlet end DN100, steam flow rate 2t / h; Inlet end DN50, outlet end DN100, steam flow rate 2t / h; Inlet diameter DN40, outlet diameter DN80, steam flow rate 1.6t / h; Inlet end DN32, outlet end DN60, steam flow rate 1.2t / h.

9. A steam ejector according to claim 1, characterized in that: The housing includes a connecting flange, a first housing, and a second housing. The connecting flange is used to connect the first housing and the second housing. The steam injection pipe is connected to the first housing, the vapor-liquid mixing pipe is connected to the second housing, and the liquid channel is located between the first housing and the second housing.

10. A steam heating tube, characterized in that: The device includes a closed pipe body and several steam ejectors as described in any one of claims 1-9. The pipe body is provided with a liquid inlet, a liquid outlet and several steam inlets. The steam ejectors are disposed on the inner wall of the pipe body. Several steam ejectors are spaced apart along the length of the pipe body. An external steam supply pipe is connected to the steam ejectors through the steam inlets. The liquid inlets are used to introduce the liquid to be heated, and the liquid outlets are used to discharge the heated liquid.

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