A waste heat power generation condensing device

Abstract

The utility model relates to a waste heat power generation technology field, concretely relates to a waste heat power generation condensing device, including layered shell structure, composite heat exchange subassembly and connecting structure, the layered shell structure is constituted by the outer annular cooling shell and inner layer spiral flow guide casing of coaxial arrangement. The utility model overcomes the deficiency of prior art, and after steam enters the inner layer casing from the condenser top inlet, rotates and flows along the curved surface channel of spiral flow guide board downward, and the spiral path prolongs the residence time of steam in the casing, simultaneously forms centrifugal field, promotes the non-condensed gas in steam to gather to the center, and liquid water drop migrates to the casing wall, and the concave-convex structure of bellows wall increases the heat exchange area, and after the steam after spiral flow guide enters the middle section porous filler layer, the steam flow is divided into multiple micrometer level jets, increases the contact area of steam and cooling pipe wall, and the device significantly improves the heat exchange efficiency and condensate recovery rate, and is suitable for industrial waste heat power generation system.

Description

Technical Field

[0001] This utility model relates to the field of waste heat power generation technology, specifically a waste heat power generation condensation device. Background Technology

[0002] In the process of industrial production, a large amount of waste gas and wastewater containing waste heat are often generated. If this waste heat is directly discharged into the environment, it will not only waste energy, but also cause thermal pollution to the environment. Waste heat power generation technology, as an effective way of waste heat recovery and utilization, can convert industrial waste heat into electricity and realize the cascade utilization of energy, which has important economic and environmental significance.

[0003] Existing waste heat power generation condensers have some problems, such as low steam condensation efficiency, resulting in high consumption of cooling medium and insufficient waste heat recovery; unreasonable internal structure of the condenser, which can easily cause poor steam flow and affect the condensation effect.

[0004] To address the problems existing in the aforementioned technologies, a waste heat power generation condensation device is proposed. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides a waste heat power generation condensation device, which overcomes the shortcomings of the prior art and solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a waste heat power generation condensation device, comprising a layered shell structure, a composite heat exchange component, and a connection structure;

[0007] The layered shell structure consists of an outer annular cooling shell and an inner spiral guide shell arranged coaxially. A base frame is fixedly installed at the bottom of the outer annular cooling shell, and a steam delivery pipe is fixedly installed at the top of the outer annular cooling shell, which communicates with the inner spiral guide shell. A condensate drain pipe is fixedly installed at the bottom of the outer annular cooling shell. A spiral guide plate is provided on the inner wall of the inner spiral guide shell. The pitch of the spiral guide plate is 200-300mm, and the inclination angle of the spiral guide plate is 35°-45°.

[0008] The composite heat exchange assembly includes a corrugated heat exchange tube assembly and a porous packing layer disposed inside the inner spiral guide shell. The corrugated heat exchange tube assembly is distributed along the curved channel of the spiral guide plate and forms a contact heat conduction connection with the spiral guide plate. The porous packing layer is located at an axial position downstream of the spiral guide plate.

[0009] The connection structure consists of flanges and quick-connect sealing rings located at both ends of the external annular cooling shell. The flanges have standardized interfaces that allow multiple condensers to be connected in series or in parallel for expansion.

[0010] By employing a double-shell design with an inner and outer shell, the inner shell features a spiral guide plate, while the outer shell is arranged with an annular cooling chamber. Steam enters the inner shell from the top inlet of the condenser and flows downwards along the curved channel of the spiral guide plate. The spiral path extends the residence time of the steam within the shell and simultaneously creates a centrifugal force field, causing uncondensed gases in the steam to gather towards the center and liquid water droplets to migrate towards the shell wall. The concave-convex structure of the corrugated pipe wall increases the heat exchange area and enhances the turbulence effect through periodic disturbances. After being guided by the spiral, the steam enters the middle porous packing layer, where the steam flow is divided into multiple micron-sized jets, increasing the contact area between the steam and the cooling pipe wall. The capillary action of the pores in the packing layer accelerates the aggregation and discharge of condensed droplets. Some steam directly contacts the condensed low-temperature water droplets within the porous packing layer, completing secondary condensation through latent heat transfer. The condensate flows along the V-shaped guide section and enters the bottom of the outer annular cooling shell through the drain outlet. The water level can be detected by a level gauge, and the detection signal controls the opening of the electric regulating valve through a PID algorithm.

[0011] As a preferred technical solution of this utility model, the ratio of the pitch of the spiral guide plate to the diameter of the inner spiral guide shell is 1:4 to 1:6, and the surface of the spiral guide plate is provided with concave and convex guide patterns.

[0012] The spiral path prolongs the residence time of steam in the shell and at the same time creates a centrifugal force field, which causes uncondensed gas in the steam to gather towards the center and liquid water droplets to migrate towards the shell wall.

[0013] As a preferred technical solution of this utility model, the corrugated heat exchange tube assembly is made of 316L stainless steel, with a tube diameter of φ20-30mm, a corrugation amplitude of 3-8mm, and a corrugation period of 15-25mm. Cooling water drain pipe and cooling water inlet pipe are fixedly connected at both ends of the corrugated heat exchange tube assembly. The flow direction of the cooling medium in the corrugated heat exchange tube assembly is opposite to the flow direction of the steam.

[0014] The corrugated pipe wall has an uneven structure that increases the heat exchange area and enhances the turbulence effect through periodic disturbances.

[0015] As a preferred technical solution of this utility model, the porosity of the porous filler layer is 70%-85%, and it is composed of alternating layers of ceramic fibers and metal wire mesh. The bottom of the porous filler layer is provided with a V-shaped flow guide, and the bottom end of the V-shaped flow guide is provided with a drain outlet.

[0016] The porous packing layer increases the contact area between steam and the cooling pipe wall, and the capillary effect of the pores in the packing layer accelerates the aggregation and discharge of condensate droplets.

[0017] As a preferred embodiment of this utility model, radial heat-conducting ribs are provided between the outer annular cooling shell and the inner spiral flow guide shell, and the spacing between the radial heat-conducting ribs is 50-100mm.

[0018] Radial heat-conducting fins form a heat conduction path between the outer annular cooling shell and the inner spiral flow-guiding shell.

[0019] As a preferred technical solution of this utility model, the inner wall of the inner spiral flow guide shell is coated with a ceramic-graphene composite anti-corrosion layer with a coating thickness of 0.2-0.5mm, which is formed by plasma spraying of 80%-85% alumina ceramic and 15%-20% graphene particles.

[0020] The corrosion-resistant coating can extend the service life of the equipment and prevent corrosion inside the inner spiral guide shell.

[0021] As a preferred embodiment of this utility model, a level gauge is fixedly installed on the inner wall of the outer annular cooling shell, and an electric regulating valve is installed on the condensate drain pipe.

[0022] The water level is detected by a level gauge, and the detection signal is used to control the opening of an electric regulating valve via a PID algorithm.

[0023] As a preferred technical solution of this utility model, the corrugated heat exchange tube assembly and the spiral guide plate are connected by an embedded snap-fit ​​structure, and the snap-fit ​​gap groove is filled with high thermal conductivity silicone grease.

[0024] The embedded snap-fit ​​structure increases the heat exchange area, resulting in insufficient contact between the cooling medium and steam, and improving the condensate recovery rate.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] 1. By adopting a double-shell design with inner and outer layers, the inner layer is equipped with a spiral guide plate and the outer layer is arranged with an annular cooling chamber. After the steam enters the inner shell from the top inlet of the condenser, it flows downward along the curved channel of the spiral guide plate. The spiral path prolongs the residence time of the steam in the shell and at the same time forms a centrifugal force field, which causes the uncondensed gas in the steam to gather towards the center and the liquid water droplets to migrate towards the shell wall. The concave and convex structure of the corrugated pipe wall increases the heat exchange area and enhances the turbulence effect through periodic disturbance.

[0027] 2. After being guided by the spiral flow, the steam enters the middle porous packing layer. The steam flow is divided into multiple micron-sized jets, increasing the contact area between the steam and the cooling pipe wall. The capillary action of the packing layer pores accelerates the aggregation and discharge of condensate droplets. Some of the steam directly contacts the condensed low-temperature water droplets in the porous packing layer, completing secondary condensation through latent heat transfer. The condensate flows along the V-shaped guide section and enters the bottom of the outer annular cooling shell through the drain port. The water level can be detected by the level gauge, and the detection signal controls the opening of the electric regulating valve through the PID algorithm. Attached Figure Description

[0028] Figure 1 This is a three-dimensional illustration of the present invention. Figure 1 ;

[0029] Figure 2 This is a three-dimensional illustration of the present invention. Figure 2 ;

[0030] Figure 3 This is a side view of the present invention;

[0031] Figure 4 For the present utility model Figure 3 Schematic diagram of the cross section at point AA.

[0032] In the diagram: 1. Outer annular cooling shell; 2. Inner spiral guide shell; 3. Base frame; 4. Steam delivery pipe; 5. Spiral guide plate; 6. Porous packing layer; 7. V-shaped guide section; 8. Drain outlet; 9. Corrugated heat exchange tube assembly; 10. Cooling water drain pipe; 11. Cooling water inlet pipe; 12. Condensate drain pipe; 13. Electric regulating valve; 14. Liquid level gauge; 15. Radial heat-conducting fins. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Example 1

[0035] Please see Figure 1-4 A waste heat power generation condensation device includes a layered shell structure, a composite heat exchange component, and a connection structure.

[0036] The layered shell structure consists of an outer annular cooling shell 1 and an inner spiral guide shell 2 arranged coaxially. A base frame 3 is fixedly installed at the bottom of the outer annular cooling shell 1, and a steam delivery pipe 4 is fixedly installed at the top of the outer annular cooling shell 1. The steam delivery pipe 4 communicates with the inner spiral guide shell 2. A condensate drain pipe 12 is fixedly installed at the bottom of the outer annular cooling shell 1. A spiral guide plate 5 is provided on the inner wall of the inner spiral guide shell 2. The pitch of the spiral guide plate 5 is 200-300mm, and the inclination angle of the spiral guide plate 5 is 35°-45°.

[0037] The composite heat exchange assembly includes a corrugated heat exchange tube assembly 9 and a porous packing layer 6 disposed inside the inner spiral guide shell 2. The corrugated heat exchange tube assembly 9 is distributed along the curved channel of the spiral guide plate 5 and forms a contact heat conduction connection with the spiral guide plate 5. The porous packing layer 6 is located at the axial position downstream of the spiral guide plate 5.

[0038] The ratio of the pitch of the spiral guide plate 5 to the diameter of the inner spiral guide shell 2 is 1:4 to 1:6. The surface of the spiral guide plate 5 is provided with concave and convex guide patterns. The spiral path prolongs the residence time of steam in the shell and at the same time forms a centrifugal force field, which causes the uncondensed gas in the steam to gather towards the center and the liquid water droplets to migrate towards the shell wall.

[0039] The corrugated heat exchanger tube assembly 9 is made of 316L stainless steel with a tube diameter of φ20-30mm, a corrugation amplitude of 3-8mm, and a corrugation period of 15-25mm. Cooling water drain pipe 10 and cooling water inlet pipe 11 are fixedly connected at both ends of the corrugated heat exchanger tube assembly 9. The flow direction of the cooling medium in the corrugated heat exchanger tube assembly 9 is opposite to the flow direction of the steam. The concave and convex structure of the corrugated tube wall increases the heat exchange area and enhances the turbulence effect through periodic disturbance.

[0040] The corrugated heat exchange tube assembly 9 is connected to the spiral guide plate 5 through an embedded snap-fit ​​structure. The snap-fit ​​gap is filled with high thermal conductivity silicone grease. The embedded snap-fit ​​structure can increase the heat exchange area, resulting in insufficient contact between the cooling medium and the steam, and improving the condensate recovery rate.

[0041] The porous packing layer 6 has a porosity of 70%-85% and is composed of alternating layers of ceramic fibers and metal wire mesh. The bottom of the porous packing layer 6 is provided with a V-shaped flow guide 7 and a drain outlet 8 at the bottom end of the V-shaped flow guide 7. The porous packing layer 6 increases the contact area between steam and the cooling pipe wall, and the capillary effect of the pores in the packing layer accelerates the aggregation and discharge of condensate droplets.

[0042] Radial heat-conducting ribs 15 are provided between the outer annular cooling shell 1 and the inner spiral flow-guiding shell 2. The spacing of the radial heat-conducting ribs 15 is 50-100mm, and the radial heat-conducting ribs 15 form a heat conduction path between the outer annular cooling shell 1 and the inner spiral flow-guiding shell 2.

[0043] Example 2

[0044] Please see Figure 4 The inner wall of the inner spiral guide shell 2 is coated with a ceramic-graphene composite anti-corrosion layer with a thickness of 0.2-0.5mm. It is formed by plasma spraying of 80%-85% alumina ceramic and 15%-20% graphene particles. The corrosion-resistant coating can extend the service life of the equipment and prevent the interior of the inner spiral guide shell 2 from being corroded.

[0045] Example 3

[0046] Please see Figure 4 A level gauge 14 is fixedly installed on the inner wall of the outer annular cooling shell 1, and an electric regulating valve 13 is installed on the condensate drain pipe 12. The water level is detected by the level gauge 14, and the detection signal is used to control the opening of the electric regulating valve 13 through a PID algorithm.

[0047] Example 4

[0048] Please see Figure 4 The connection structure consists of flanges and quick-connect sealing rings located at both ends of the external annular cooling shell 1. The flanges have standardized interfaces, allowing multiple condensers to be connected in series or in parallel for expansion.

[0049] Working principle: Waste heat steam enters the inner spiral guide shell 2 from the steam delivery pipe 4, and rotates downward along the spiral guide plate 5 at a speed of 2-3 m / s. The spiral path extends the steam residence time to 20s. The temperature difference of the corrugated heat exchange tube group 9 generates primary condensation, and about 65% of the steam is converted into condensate. The remaining steam penetrates the porous packing layer 6. The metal wire mesh cuts the steam flow to form a micron-level jet, increasing the contact area with the low-temperature tube wall. The capillary action of the ceramic fiber accelerates the droplet coalescence, and the condensate recovery rate is increased to 94%. The uncondensed steam enters the area between the outer annular cooling shell 1 and the inner spiral guide shell 2. The radial heat-conducting fins 15 transfer the residual heat to the air cooling medium. Finally, the exhaust temperature drops to below 85℃, and the heat recovery completion rate is >92%.

[0050] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0051] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 according to the specific circumstances.

[0052] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waste heat power generation condensation device, characterized in that: It includes a layered shell structure, composite heat exchange components, and connection structure; The layered shell structure consists of an outer annular cooling shell (1) and an inner spiral guide shell (2) arranged coaxially. A base frame (3) is fixedly installed at the bottom of the outer annular cooling shell (1), and a steam delivery pipe (4) is fixedly installed at the top of the outer annular cooling shell (1). The steam delivery pipe (4) is connected to the inner spiral guide shell (2). A condensate drain pipe (12) is fixedly installed at the bottom of the outer annular cooling shell (1). A spiral guide plate (5) is provided on the inner wall of the inner spiral guide shell (2). The pitch of the spiral guide plate (5) is 200-300mm, and the inclination angle of the spiral guide plate (5) is 35°-45°. The composite heat exchange assembly includes a corrugated heat exchange tube assembly (9) and a porous packing layer (6) disposed inside the inner spiral guide shell (2). The corrugated heat exchange tube assembly (9) is distributed along the curved channel of the spiral guide plate (5) and forms a contact heat conduction connection with the spiral guide plate (5). The porous packing layer (6) is located at the axial position downstream of the spiral guide plate (5). The connection structure consists of flanges and quick-connect sealing rings located at both ends of the external annular cooling shell (1). The flanges are equipped with standardized interfaces, allowing multiple condensers to be connected in series or in parallel for expansion.

2. The waste heat power generation condensation device according to claim 1, characterized in that: The ratio of the pitch of the spiral guide plate (5) to the diameter of the inner spiral guide shell (2) is 1:4 to 1:6, and the surface of the spiral guide plate (5) is provided with concave and convex guide patterns.

3. The waste heat power generation condensation device according to claim 1, characterized in that: The corrugated heat exchange tube assembly (9) is made of 316L stainless steel with a tube diameter of φ20-30mm, a corrugation amplitude of 3-8mm, and a corrugation period of 15-25mm. Cooling water drain pipe (10) and cooling water inlet pipe (11) are fixedly connected at both ends of the corrugated heat exchange tube assembly (9). The flow direction of the cooling medium in the corrugated heat exchange tube assembly (9) is opposite to the flow direction of the steam.

4. The waste heat power generation condensation device according to claim 1, characterized in that: The porous filler layer (6) has a porosity of 70%-85% and is composed of alternating layers of ceramic fibers and metal wire mesh. The bottom of the porous filler layer (6) is provided with a V-shaped flow guide (7), and a drain outlet (8) is provided at the bottom end of the V-shaped flow guide (7).

5. A waste heat power generation condensation device according to claim 1, characterized in that: Radial heat-conducting ribs (15) are provided between the outer annular cooling shell (1) and the inner spiral flow guide shell (2), with a spacing of 50-100mm between the radial heat-conducting ribs (15).

6. A waste heat power generation condensation device according to claim 1, characterized in that: The inner spiral flow guide shell (2) is coated with a ceramic-graphene composite anti-corrosion layer with a coating thickness of 0.2-0.5 mm. It is formed by plasma spraying of 80%-85% alumina ceramic and 15%-20% graphene particles.

7. A waste heat power generation condensation device according to claim 1, characterized in that: A level gauge (14) is fixedly installed on the inner wall of the outer annular cooling shell (1), and an electric regulating valve (13) is installed on the condensate drain pipe (12).

8. A waste heat power generation condensation device according to claim 3, characterized in that: The corrugated heat exchanger tube assembly (9) and the spiral guide plate (5) are connected by an embedded snap-fit ​​structure, and the snap-fit ​​gap groove is filled with high thermal conductivity silicone grease.

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