Waste heat recoverer of screw air compressor

Abstract

The utility model relates to the field of heat exchange equipment, in particular to a waste heat recoverer of a screw air compressor, which comprises a long-tank-shaped shell, and a heat exchange cavity is arranged in the shell. An air inlet pipe is inserted into the shell and penetrates into the heat exchange cavity, the end, entering the heat exchange cavity, of the air inlet pipe is communicated with a heat exchange assembly, the heat exchange assembly comprises a heat exchange disc, the axis of the heat exchange disc is collinear with the axis of the air inlet pipe, the diameter of the heat exchange disc is four times that of the air inlet pipe, and the end, away from the air inlet pipe, of the heat exchange disc is communicated with a transfer pipe. The end, away from the heat exchange disc, of the transfer pipe communicates with a heat exchange pipe, the heat exchange pipe is spirally arranged, the spiral diameter of the heat exchange pipe is twice the diameter of the air inlet pipe, the end, away from the heat exchange disc, of the heat exchange pipe communicates with an air outlet pipe, the air outlet pipe penetrates through the end, away from the air inlet pipe, of the shell, and the top end of the shell is connected with a water inlet pile with a valve. The bottom end of the shell is connected with a water outlet pile with a valve, and the effects that the single heat exchange amount is increased, and the convenience of heat exchange work is improved are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to a heat recovery device for a screw air compressor. Background Technique

[0002] An air compressor is a device that converts the mechanical energy of a prime mover (usually an electric motor) into gas pressure energy. Air compressors are usually reciprocating piston type, helical vane type or rotary screw type, as well as centrifugal type. During the process of compressing air by the air compressor, a large amount of heat is generated, and the heat is dissipated in the form of air cooling or water cooling through the cooling system of the air compressor, and is discharged as waste heat into the surrounding environment.

[0003] Currently, only 6% of the electric energy consumed by the air compressor is used for compressing air, and 94% is converted into the heat energy of the compressed air. This part of the heat energy is usually directly discharged through the heat exchange equipment. Currently, plate heat exchangers are mainly used in heat exchange equipment, and the plate heat exchanger dissipates heat through natural air heat conversion.

[0004] The above-mentioned prior art has the following defects:

[0005] During use, since the plate heat exchanger usually uses a straight-tube contact method for heat exchange, the contact area during heat exchange is small, resulting in poor heat exchange effect of the gas using the plate heat exchanger once. Multiple plate heat exchangers need to be used simultaneously to reduce the gas to the target temperature, increasing the complexity of the heat exchange work. Content of the Utility Model

[0006] The purpose of the utility model is to provide a heat recovery device for a screw air compressor, so as to achieve the effect of improving the amount of heat exchange per time and the convenience of heat exchange work, and solve the problems raised in the above background technique.

[0007] In order to achieve the above technical purpose and achieve the above technical effect, the utility model is realized by the following technical solutions:

[0008] A screw air compressor waste heat recovery device includes a long-tank-shaped housing with a heat exchange chamber opened therein; an air inlet pipe is inserted into the housing and extends deep into the heat exchange chamber. The end of the air inlet pipe entering the heat exchange chamber is connected to a heat exchange component. The heat exchange component includes a heat exchange disc, which is arranged in a circular flying saucer shape. The axis of the heat exchange disc is collinear with the axis of the air inlet pipe. The diameter of the heat exchange disc is four times the diameter of the air inlet pipe. The end of the heat exchange disc far from the air inlet pipe is connected to a transfer pipe. The axis of the transfer pipe is not collinear with the axis of the air inlet pipe. The transfer pipe is located on the side of the heat exchange disc close to the water inlet pile. The end of the transfer pipe far from the heat exchange disc is connected to a heat exchange pipe, which is arranged in a spiral shape. The spiral axis of the heat exchange pipe is collinear with the axis of the air inlet pipe. The spiral diameter of the heat exchange pipe is twice the diameter of the air inlet pipe. The end of the heat exchange pipe far from the heat exchange disc is connected to an air outlet pipe, which penetrates through the end of the outer shell far from the air inlet pipe. A water inlet pile with a valve is connected to the top of the outer shell. The water inlet pile is fixedly connected to the outer shell and is communicated with the heat exchange chamber; a water outlet pile with a valve is connected to the bottom of the outer shell. The water outlet pile is fixedly connected to the outer shell and is communicated with the heat exchange chamber.

[0009] As a preferred embodiment of the present invention, heat transfer blocks are fixedly connected to the tube wall of the heat exchange pipe. There are multiple heat transfer blocks, and the multiple heat transfer blocks are linearly distributed.

[0010] As a preferred embodiment of the present invention, a heat conduction rod is fixedly connected to the multiple heat transfer blocks, and each heat transfer block is fixedly connected to the circumferential side surface of the heat conduction rod.

[0011] As a preferred embodiment of the present invention, the multiple heat transfer blocks are located in the direction of the heat exchange pipe facing the water outlet pile, the heat conduction rod is located in the direction of the heat transfer block facing the water outlet pile, and a support rod is fixedly connected to the direction of the heat conduction rod facing the water outlet pile. One end of the support rod is fixedly connected to the heat conduction rod, and the other end is fixedly connected to the inner wall of the heat exchange chamber.

[0012] As a preferred embodiment of the present invention, the end of the heat conduction rod close to the heat exchange disc is fixedly connected to the end face of the heat exchange disc. A long strip-shaped receiving seat is fixedly connected to the end of the heat conduction rod close to the heat exchange disc. One end of the receiving seat is fixedly connected to the heat conduction rod, and the other end is bent to form a receiving groove, and the heat exchange disc is clamped in the receiving groove.

[0013] As a preferred embodiment of the present invention, annular heat exchange tracks are opened on the end face of the heat exchange disc. There are multiple heat exchange tracks, and the multiple heat exchange tracks are concentrically arranged with the end face of the heat exchange disc.

[0014] Beneficial effects

[0015] The beneficial effects of the present invention are:

[0016] When heat exchange is carried out, workers fill the heat exchange cavity with water for heat absorption and utilization through the water inlet pile. Then, the high-temperature gas is sent into the heat exchange cavity through the inlet pipe. The gas first enters the heat exchange disc through the inlet pipe. Since the diameter of the heat exchange disc is four times that of the inlet pipe, on the one hand, the gas will carry out heat exchange under the condition of a larger heat exchange area provided by the heat exchange disc. On the other hand, it can provide a larger volume for the gas. At the same time, combined with the transfer pipe, it can make the gas stay in the heat exchange disc for a longer time, thereby extending the heat exchange time of the gas in the heat exchange disc, facilitating more heat absorption by the water in the heat exchange cavity, and thus better improving the heat exchange effect. When the gas enters the heat exchange pipe through the transfer pipe, due to the spiral setting of the heat exchange pipe, the surface area of the heat exchange pipe itself is extended, further increasing the heat exchange amount of the gas in the heat exchange cavity. As a result, when the gas passes through the heat exchange cavity once, it can exchange more heat, improving the single-time heat exchange amount, eliminating the situation of using multiple heat exchangers simultaneously, and improving the convenience of the heat exchange work. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram showing the internal structure of the housing;

[0020] Figure 3 It is a schematic diagram showing the heat exchange track alone.

[0021] In the drawings, the list of components represented by each reference numeral is as follows:

[0022] 1. Housing; 11. Heat exchange cavity; 12. Water inlet pile; 13. Water outlet pile; 2. Inlet pipe; 3. Heat exchange assembly; 31. Heat exchange disc; 311. Heat exchange track; 32. Transfer pipe; 33. Heat exchange pipe; 4. Outlet pipe; 5. Heat transfer block; 6. Heat conduction rod; 61. Support rod; 62. Bearing seat; 621. Bearing groove. Detailed Description of the Embodiment

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0024] Referring to Figures 1-3 As shown, a waste heat recovery device for a screw air compressor includes a horizontally lying long-tank-shaped housing 1. A heat exchange cavity 11 is provided in the housing 1. An inlet water pile 12 with a valve is connected to the top end of the housing. The inlet water pile 12 is fixedly connected to the housing and is communicated with the heat exchange cavity 11. An outlet water pile 13 with a valve is connected to the bottom end of the housing. The outlet water pile 13 is fixedly connected to the housing and is communicated with the heat exchange cavity 11. An intake pipe 2 is inserted at the end of the housing 1. The axis of the intake pipe 2 is collinear with the axis of the housing 1. The intake pipe 2 extends into the heat exchange cavity 11. The circumferential side wall of the intake pipe 2 is fixedly connected to the housing 1. The end of the intake pipe 2 that enters the heat exchange cavity 11 is communicated with a heat exchange component 3. When performing heat exchange work, workers fill the heat exchange cavity 11 with water for heat exchange through the provided inlet water pile 12, and then set a heat exchange component 3 with a larger heat exchange area in the heat exchange cavity 11, achieving the effect of improving the single-time heat exchange amount, eliminating the situation of using multiple heat exchangers simultaneously, and improving the convenience of heat exchange work. At the same time, the hot water formed after heat exchange can be led out through the outlet water pile 13 for daily domestic use, realizing the recovery and utilization of heat.

[0025] The heat exchange component 3 includes a heat exchange disc 31. The heat exchange disc 31 is arranged in a circular flying saucer shape. The axis of the heat exchange disc 31 is collinear with the axis of the intake pipe 2. The diameter of the heat exchange disc 31 is four times the diameter of the intake pipe 2. An annular heat exchange track 311 is provided on the end face of the heat exchange disc 31. There are multiple heat exchange tracks 311, and the multiple heat exchange tracks 311 are concentrically arranged with the end face of the heat exchange disc 31. One end of the heat exchange disc 31 far from the intake pipe 2 is communicated with a transfer pipe 32. The axis of the transfer pipe 32 is not collinear with the axis of the intake pipe 2. The transfer pipe 32 is located on the side of the heat exchange disc 31 close to the inlet water pile 12. The end of the transfer pipe 32 far from the heat exchange disc 31 is communicated with a heat exchange pipe 33. The heat exchange pipe 33 is arranged in a spiral shape. The spiral axis of the heat exchange pipe 33 is collinear with the axis of the intake pipe 2. The spiral diameter of the heat exchange pipe 33 is twice the diameter of the intake pipe 2. One end of the heat exchange pipe 33 far from the heat exchange disc 31 is communicated with an outlet pipe 4. The outlet pipe 4 penetrates through the end of the housing far from the intake pipe 2.

[0026] At the position where the heat exchange tube 33 faces the water outlet pile 13, a plurality of heat transfer blocks 5 are fixedly connected. The plurality of heat transfer blocks 5 are distributed in a straight line parallel to the spiral axis of the heat exchange tube 33. The arranged plurality of heat transfer blocks 5 can further increase the surface area of the heat exchange tube 33, thereby further improving the heat exchange efficiency of the heat exchange tube 33. A heat conduction rod 6 is fixedly connected to the plurality of heat transfer blocks 5. Each heat transfer block 5 is fixedly connected to the circumferential side surface of the heat conduction rod 6. The heat conduction rod 6 is located in the direction of the heat transfer block 5 facing the water outlet pile 13. A support rod 61 is fixedly connected to the heat conduction rod 6 in the direction of the heat transfer block 5 facing the water outlet pile 13. One end of the support rod 61 is fixedly connected to the heat conduction rod 6, and the other end is fixedly connected to the inner wall of the heat exchange cavity 11. Through the cooperation of the support rod 61 and the heat conduction rod 6, a supporting effect can be provided for the heat exchange tube 33, reducing the bearing pressure of the intake pipe 2 and the exhaust pipe 4, thereby improving the service stability of the heat exchange tube 33. The end of the heat conduction rod 6 close to the heat exchange disc 31 is fixedly connected to the end face of the heat exchange disc 31. A long strip-shaped receiving seat 62 is fixedly connected to the end of the heat conduction rod 6 close to the heat exchange disc 31. One end of the receiving seat 62 is fixedly connected to the heat conduction rod 6, and the other end is bent to form a receiving groove 621. The heat exchange disc 31 is clamped in the receiving groove 621. On the one hand, the receiving seat can provide support for the heat exchange disc 31, further reducing the bearing pressure of the intake pipe 2 and the exhaust pipe 4 and improving the service stability of the heat exchange disc 31. On the other hand, since the solid heat transfer speed is relatively fast, when the temperature of the heat exchange disc 31 rises, the temperature can be preferentially transferred to the heat exchange tube 33 through the heat conduction rod 6 and the heat transfer block 5, providing a preheating effect for the heat exchange tube 33, preventing the heat exchange tube 33 from bursting due to the thermal expansion and contraction caused by the large temperature difference after the high-temperature gas directly enters the heat exchange tube 33, and further improving the service effect of the heat exchange tube 33. At the same time, the use of the heat conduction rod 6 and the receiving seat also further increases the heat exchange area of the heat exchange disc 31, further improving the heat exchange effect.

[0027] A specific application of this embodiment is as follows:

[0028] Before heat exchange, the worker first fills the heat exchange cavity 11 with water for heat absorption and utilization through the water inlet pile 12. When performing heat exchange, the worker sends high-temperature gas into the heat exchange cavity 11 through the intake pipe 2.

[0029] The gas first enters the heat exchange disc 31 through the intake pipe 2. Since the diameter of the heat exchange disc 31 is four times that of the intake pipe 2, on the one hand, the gas will exchange heat under the condition of a larger heat exchange area provided by the heat exchange disc 31, and on the other hand, it can provide a larger volume for the gas. At the same time, a plurality of heat exchange tracks 311 provided on the heat exchange disc 31 can further increase the contact area between the heat exchange disc 31 and water. Since the position where the transfer pipe 32 communicates with the heat exchange disc 31 is above the axis of the heat exchange disc 31, the gas stays in the heat exchange disc 31 for a longer time. The receiving seat 62 in contact with the heat exchange disc 31 can further increase the contact area between the heat exchange disc 31 and water to enhance heat exchange. At the same time, part of the heat accumulated in the heat exchange disc 31 is also transferred to the heat exchange pipe 33 through the receiving seat 62, the heat conducting rod 6 and a plurality of heat transfer blocks 5, and the heat exchange pipe 33 is preheated.

[0030] When the gas enters the heat exchange pipe 33 through the transfer pipe 32, since the heat exchange pipe 33 is arranged in a spiral shape, the surface area of the heat exchange pipe 33 itself is extended, further increasing the heat exchange amount of the gas in the heat exchange chamber 11. At the same time, the heat transfer block 5 connected to the heat exchange pipe 33 can transfer more heat in the heat exchange pipe 33 to the water body, so that when the gas passes through the heat exchange chamber 11 once, the gas can exchange more heat. In summary, through the above steps, the effect of improving the heat exchange amount per time, eliminating the situation of using multiple heat exchangers at the same time, and improving the convenience of the heat exchange work is achieved.

[0031] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, alterations, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A screw air compressor waste heat recovery device, comprising a long-tank-shaped housing (1), characterized in that: A heat exchange cavity (11) is provided in the housing (1); an air inlet pipe (2) is inserted into the housing (1), and the air inlet pipe (2) extends deep into the heat exchange cavity (11). The end of the air inlet pipe (2) entering the heat exchange cavity (11) is connected to a heat exchange component (3). The heat exchange component (3) includes a heat exchange disc (31). The heat exchange disc (31) is arranged in a circular flying saucer shape. The axis of the heat exchange disc (31) is collinear with the axis of the air inlet pipe (2). The diameter of the heat exchange disc (31) is four times the diameter of the air inlet pipe (2). The end of the heat exchange disc (31) away from the air inlet pipe (2) is connected to a transfer pipe (32). The axis of the transfer pipe (32) is not collinear with the axis of the air inlet pipe (2). The transfer pipe (32) is located on the side of the heat exchange disc (31) close to the water inlet pile (12). The end of the transfer pipe (32) away from the heat exchange disc (31) is connected to a heat exchange pipe (33). The heat exchange pipe (33) is arranged in a spiral shape. The spiral axis of the heat exchange pipe (33) is collinear with the axis of the air inlet pipe (2). The spiral diameter of the heat exchange pipe (33) is twice the diameter of the air inlet pipe (2). The end of the heat exchange pipe (33) away from the heat exchange disc (31) is connected to an air outlet pipe (4). The air outlet pipe (4) penetrates through the end of the outer shell away from the air inlet pipe (2). A water inlet pile (12) with a valve is connected to the top of the outer shell. The water inlet pile (12) is fixedly connected to the outer shell and is communicated with the heat exchange cavity (11); a water outlet pile (13) with a valve is connected to the bottom of the outer shell. The water outlet pile (13) is fixedly connected to the outer shell and is communicated with the heat exchange cavity (11).

2. The waste heat recovery device for a screw air compressor according to claim 1, wherein: Heat transfer blocks (5) are fixedly connected to the tube wall of the heat exchange tube (33). There are multiple heat transfer blocks (5), and the multiple heat transfer blocks (5) are linearly distributed.

3. The screw air compressor waste heat recovery device according to claim 2, characterized in that: A heat conduction rod (6) is fixedly connected to the multiple heat transfer blocks (5). Each heat transfer block (5) is fixedly connected to the circumferential side surface of the heat conduction rod (6).

4. The waste heat recovery device for a screw air compressor according to claim 3, wherein: The multiple heat transfer blocks (5) are located in the direction of the heat exchange tube (33) facing the water outlet pile (13). The heat conduction rod (6) is located in the direction of the heat transfer block (5) facing the water outlet pile (13). A support rod (61) is fixedly connected to the direction of the heat conduction rod (6) facing the water outlet pile (13). One end of the support rod (61) is fixedly connected to the heat conduction rod (6), and the other end is fixedly connected to the inner wall of the heat exchange cavity (11).

5. The waste heat recovery device for a screw air compressor according to claim 4, characterized in that: The end of the heat conduction rod (6) close to the heat exchange disc (31) is fixedly connected to the end face of the heat exchange disc (31). A long strip-shaped receiving seat (62) is fixedly connected to the end of the heat conduction rod (6) close to the heat exchange disc (31). One end of the receiving seat (62) is fixedly connected to the heat conduction rod (6), and the other end is bent to form a receiving groove (621). The heat exchange disc (31) is clamped in the receiving groove (621).

6. The waste heat recovery device for a screw air compressor according to claim 1, characterized in that: An annular heat exchange track (311) is provided on the end face of the heat exchange disc (31). There are multiple heat exchange tracks (311), and the multiple heat exchange tracks (311) are concentrically arranged with the end face of the heat exchange disc (31).

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