Mechanical vapor recompression heat pump

Abstract

The utility model relates to the technical field of waste heat utilization, in particular to a mechanical vapor recompression heat pump which comprises a preheater, a raw material outlet is formed in the lower right position of the preheater, the outlet end of the raw material outlet is communicated with an evaporator body, and the outlet end of the top of the evaporator body is communicated with a separator body. According to the heat exchanger, through the arrangement of the electric heating device, the heat preservation switching cylinder, the metal inner pipe, the installation clamping base, the power-on terminal, the fixing chuck, the electric heating rod and the inner insertion ring groove, the whole conduction heating is more uniform, and the heat exchange efficiency is improved; according to the mechanical steam recompression heat pump, after the temperature of secondary steam is increased through the compressor body, the whole unit can conduct auxiliary heating on the secondary steam with the poor temperature increasing effect by additionally arranging the electric heating device in the conveying pipeline, and the temperature increasing effect of the whole unit on the secondary steam is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat utilization, in particular to a mechanical vapor recompression heat pump. Background Art

[0002] When achieving energy-saving heating in industrial production, a mechanical vapor recompression heat pump is a commonly used energy-saving heating unit. When operating, it can use mechanical compression to perform work, raising the energy of low-temperature, low-pressure steam to a high-temperature, high-pressure state, achieving efficient recovery and reuse of waste heat. At the same time, a common mechanical vapor recompression heat pump unit mainly consists of several important components such as a compressor, an evaporator, a heat exchanger, and a gas-liquid separator.

[0003] In the prior art, mechanical steam recompression heat pumps are used for energy-saving heating to achieve efficient recovery and reuse of low-grade waste heat. The main method is to compress low-temperature, low-pressure industrial steam through a compressor to make it into high-temperature, high-pressure industrial gas. However, considering that the compressor works in a low-temperature environment for a long time, there is a problem of abnormal operation, which may lead to poor steam temperature increase effect in the process of compressing secondary steam in the entire unit, and also affect the subsequent efficient recycling and reuse of steam. Therefore, a mechanical steam recompression heat pump is proposed to address the above problems. Utility Model Content

[0004] The purpose of the present invention is to provide a mechanical vapor recompression heat pump to solve the problem of poor temperature raising effect when using mechanical vapor recompression heat pumps in the prior art as mentioned in the background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A mechanical vapor recompression heat pump comprises a preheater, a raw material outlet is provided at the lower right position of the preheater, the outlet end of the raw material outlet is connected to the evaporator body, the top outlet end of the evaporator body is connected to the separator body, the top air outlet end of the separator body is connected to the compressor body, the air outlet end of the compressor body is connected to an electric heating device, the electric heating device comprises a thermal insulation adapter tube, the interior of the thermal insulation adapter tube is integrally formed with an inner insert ring groove, the inner center position of the inner insert ring groove is fixedly connected to a metal inner tube, the inner left side of the inner insert ring groove is clamped with a mounting base, the side of the mounting base away from the inner insert ring groove is fixedly installed with a power terminal, the outer side of the metal inner tube is provided with an electric heating rod fixedly installed at one side of the mounting base, and the outer side of the mounting base is provided with a fixing chuck detachably connected to the thermal insulation adapter tube bolt.

[0007] Preferably, a raw material inlet is provided at the lower left position of the preheater, a condensed water outlet is provided at the upper left position of the preheater, and a condensed water inlet is provided at the upper right position of the preheater.

[0008] Preferably, the inlet end of the condensed water inlet is connected to the outlet provided at the lower right position of the evaporator body, and the air inlet port provided at the upper left position of the evaporator body is connected to the air outlet port of the electric heating device.

[0009] Preferably, a concentrated liquid outlet with a conical structure is provided at the bottom of the separator body.

[0010] Preferably, the heating rods are arranged in a ring-shaped array along the center point of the mounting base, the electric heating rods are arranged inside the inner ring groove, the right air outlet end of the metal inner tube is arranged in a conical structure, the top of the metal inner tube is provided with an air inlet interface, the right side of the metal inner tube is provided with an air outlet interface, and the electric heating rods and the power terminal are electrically connected.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] In the utility model, the electric heating device, thermal insulation adapter tube, metal inner tube, mounting bracket, power terminal, fixing chuck, electric heating rod and inner insert ring groove are provided, which makes the entire conduction heating more uniform, and facilitates the mechanical steam recompression heat pump to be able to heat the secondary steam through the compressor body. For long-term use in low-temperature environment, an electric heating device can be added to the transmission pipeline, so that the entire unit can assist in heating the secondary steam with poor heating effect through heat conduction between the metal inner tube and the electric heating rod, further improving the heating effect of the entire unit on the secondary steam, so that it can be efficiently recycled and reused later, ensuring the working efficiency of the unit during actual operation, and reducing the impact of environmental factors on the operation of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the electric heating device of the utility model;

[0015] Figure 3 This is a schematic diagram of the arrangement structure of the electric heating rod of the utility model.

[0016] In the figure: 1. Preheater; 11. Raw material inlet; 12. Condensate outlet; 13. Raw material outlet; 14. Condensate inlet; 2. Evaporator body; 3. Separator body; 4. Compressor body; 5. Electric heating device; 51. Insulation adapter tube; 52. Metal inner tube; 53. Air outlet interface; 54. Air inlet interface; 55. Mounting bracket; 56. Power terminal; 57. Fixing chuck; 58. Electric heating rod; 59. Inner ring groove. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figure 1-3 , the utility model provides a technical solution:

[0019] A mechanical vapor recompression heat pump comprises a preheater 1, a raw material outlet 13 is provided at the lower right position of the preheater 1, the outlet end of the raw material outlet 13 is connected to the evaporator body 2, the top outlet end of the evaporator body 2 is connected to the separator body 3, the top air outlet end of the separator body 3 is connected to the compressor body 4, the air outlet end of the compressor body 4 is connected to the electric heating device 5, the electric heating device 5 comprises a thermal insulation adapter tube 51, the interior of the thermal insulation adapter tube 51 is integrally formed with an inner insert ring groove 59, a metal inner tube 52 is fixedly connected to the inner center position of the inner insert ring groove 59, a mounting base 55 is clamped on the left side of the inner insert ring groove 59, a power terminal 56 is fixedly installed on the side of the mounting base 55 away from the inner inner insert ring groove 59, the outer contact of the metal inner tube 52 is provided with an electric heating rod 58 fixedly installed at one side of the mounting base 55, and the outer side of the mounting base 55 is provided with a fixing chuck 57 which is detachably connected to the thermal insulation adapter tube 51 by bolts.

[0020] like Figure 1As shown, a raw material inlet 11 is provided at the lower left position of the preheater 1, a condensate outlet 12 is provided at the upper left position of the preheater 1, and a condensate inlet 14 is provided at the upper right position of the preheater 1. When condensate is generated during the operation of the evaporator body 2, the condensate will be sent to the interior of the preheater 1 through the liquid outlet provided at the bottom of the evaporator body 2 and the interior of the condensate inlet 14, and then brought out through the interior of the condensate outlet 12; the inlet end of the condensate inlet 14 and the outlet provided at the lower right position of the evaporator body 2 are connected, and the air inlet port provided at the upper left position of the evaporator body 2 and the air outlet port of the electric heating device 5 are connected; a concentrated liquid outlet with a conical structure is provided at the bottom position of the separator body 3. When the secondary steam is sent into the interior of the separator body 3 for separation, the separated concentrated liquid will be brought out from the conical outlet reserved at the bottom of the separator body 3.

[0021] like Figure 1 、 Figure 2 and Figure 3 As shown, the electric heating rods 58 are arranged in a ring-shaped array along the center point of the mounting base 55. The electric heating rods 58 are arranged inside the inner ring groove 59. The right side air outlet end of the metal inner tube 52 is arranged in a conical structure. The top of the metal inner tube 52 is provided with an air inlet interface 54, and the right side of the metal inner tube 52 is provided with an air outlet interface 53. The electric heating rods 58 and the power terminal 56 are electrically connected, and the electric heating rods 58 are arranged in a ring-shaped array.

[0022] Working process: When the heating unit in the present invention starts running, the driving power of each component comes from an external power supply, and before using the heating unit, the evaporator body 2 and the raw material delivery pipeline need to be connected. In industrial production, when the mechanical steam recompression heat pump is needed, the raw material is sent into the interior of the preheater 1 through the raw material inlet 11 for heat exchange, and the concentrated liquid and secondary steam are produced and sent to the interior of the separator body 3. The concentrated liquid in the secondary steam in the separator body 3 will be separated inside the separator body 3 and taken out from the bottom conical outlet, and the separated pure secondary steam is transported from the separator body 3 to the compressor body 4. In the process of compressing the secondary steam, the temperature of the steam will increase, and then it will be transported to the evaporator body 2 and used as the evaporator heat source. Cooperating with the entire heating unit, the low-grade steam can be efficiently recovered and reused to achieve the purpose of energy-saving and environmentally friendly heating. The above process flow is the existing heating technology, and considering the machine In the case that the unit may be used in a low-temperature environment for a long time, before using the entire unit, the electric heating device 5 can be connected to the transmission pipeline between the compressor body 4 and the evaporator body 2. At the same time, during specific use, combined with the continuous operation of the compressor body 4 in a low-temperature environment, the temperature of the secondary steam will be increased by compression. In the process of the secondary steam after the temperature is increased being transported to the inside of the evaporator body 2, under the connection between the electric heating device 5 and the inner insert ring groove 59, the secondary steam will first be sent into the metal inner tube 52 through the inside of the air inlet interface 54. At this time, under the adapter action of the mounting bracket 55, the multiple electric heating rods 58 connected to the power supply through the power terminal 56 will transfer the heat generated when the power is turned on to the metal inner tube 52, so that the secondary steam sent into the metal inner tube 52 is subjected to conductive electric heating treatment, and then the secondary steam assisted by electric heating will be efficiently sent to the inside of the evaporator body 2 for circulation, reducing the impact of the external low-temperature environment on the entire steam heating operation.

[0023] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical vapor recompression heat pump comprising a preheater (1), characterized in that: A raw material outlet (13) is provided at the lower right position of the preheater (1), the outlet end of the raw material outlet (13) is connected to the evaporator body (2), the top outlet end of the evaporator body (2) is connected to the separator body (3), the top air outlet end of the separator body (3) is connected to the compressor body (4), the air outlet end of the compressor body (4) is connected to the electric heating device (5), the electric heating device (5) includes a heat preservation adapter tube (51), and the heat preservation adapter tube (51) is integrally formed with an inner insert ring groove (59) The inner center of the inner insert ring groove (59) is fixedly connected to a metal inner tube (52), the inner left side of the inner insert ring groove (59) is clamped with a mounting base (55), the side of the mounting base (55) away from the inner part of the inner insert ring groove (59) is fixedly mounted with a power terminal (56), the outer side of the metal inner tube (52) is provided with an electric heating rod (58) fixedly mounted on one side of the mounting base (55), and the outer side of the mounting base (55) is provided with a fixing chuck (57) detachably connected to the heat preservation adapter tube (51) with bolts.

2. A mechanical vapor recompression heat pump according to claim 1, characterized in that: A raw material inlet (11) is provided at the lower left position of the preheater (1), a condensed water outlet (12) is provided at the upper left position of the preheater (1), and a condensed water inlet (14) is provided at the upper right position of the preheater (1).

3. A mechanical vapor recompression heat pump according to claim 2, characterized in that: The inlet end of the condensed water inlet (14) is connected to the outlet provided at the lower right position of the evaporator body (2), and the air inlet port provided at the upper left position of the evaporator body (2) is connected to the air outlet port of the electric heating device (5).

4. A mechanical vapor recompression heat pump according to claim 1, characterized in that: A concentrated liquid outlet with a conical structure is provided at the bottom of the separator body (3).

5. The mechanical vapor recompression heat pump according to claim 1, characterized in that: The electric heating rods (58) are arranged in a ring-shaped array along the center point of the mounting base (55). The electric heating rods (58) are arranged inside the inner ring groove (59). The right side air outlet end of the metal inner tube (52) is arranged in a conical structure. The top of the metal inner tube (52) is provided with an air inlet interface (54), and the right side of the metal inner tube (52) is provided with an air outlet interface (53). The electric heating rods (58) and the power terminal (56) are electrically connected.

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