Evaporator structure on heat pump rectification device

Abstract

The utility model discloses an evaporator structure on a heat pump rectification device, which belongs to the technical field of evaporators, and comprises a heater, an evaporator is integrally mounted on the lower side of the heater, a rectification tower communicated with the evaporator is arranged on one side of the evaporator, and a heat exchanger is arranged on the other side of the heat pump rectification device. The top of the rectifying tower is communicated with the side part of the heater through a heat pump and a steam return pipe. According to the technical scheme, fresh heating steam only needs to be input in the initial preheating stage, a heat source in the subsequent stage is provided by the heat pump, heat loss in the circulation process is effectively reduced, the equipment energy consumption is lower, the heat exchange temperature difference is smaller, meanwhile, the split type structure is changed into the integrated structure, the size of the whole equipment is greatly reduced, and the cost is reduced. Therefore, the installation space of the device is reduced, and installation and use are more convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of evaporators, and particularly relates to an evaporator structure on a heat pump rectification device. Background Technique

[0002] Rectification is a separation process that separates each component of a mixture by the different volatilities of each component. Commonly used equipment includes a rectification column. In the rectification column, gas-liquid two-phase contact countercurrently to conduct interphase heat and mass transfer. The volatile components in the liquid phase enter the gas phase, and the non-volatile components in the gas phase transfer into the liquid phase. Thus, almost pure volatile components can be obtained at the top of the column, and almost pure non-volatile components can be obtained at the bottom of the column.

[0003] Such as Figure 1 As an existing rectification evaporation structure, fresh heating steam is continuously input into the evaporator to heat the material. The evaporated material follows the steam into the rectification column to complete rectification. However, in this structure, the material needs to be continuously heated by fresh heating steam, and only a small amount of waste heat is recovered through condensed water. At the same time, the split structure is huge in volume, occupies a large space, and is very inconvenient for assembly and use. Content of the Utility Model

[0004] The purpose of the utility model is to provide an evaporator structure on a heat pump rectification device to solve the problems in the use of the existing evaporator of the rectification device in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an evaporator structure on a heat pump rectification device, including a heater, an evaporator is integrally installed on the lower side of the heater, a rectification column communicated with the evaporator is arranged on one side of the evaporator, and the top of the rectification column is communicated with the side part of the heater through a heat pump and a steam return pipe.

[0006] Preferably, a steam inlet pipe and a return pipe are arranged between the evaporator and the rectification column, wherein the steam inlet pipe is arranged above the gas-liquid separation line in the evaporator, and the return pipe is arranged below the gas-liquid separation line in the evaporator.

[0007] Preferably, a stable support is further arranged between the steam return pipe and the heater.

[0008] Preferably, two groups of pipe orifices are further arranged on the heater, and the two groups of pipe orifices include a steam pipe orifice communicated with an external steam heat source and a steam condensate pipe orifice.

[0009] Preferably, the upper end of the heater is at the same height as the upper end of the rectification column.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] This technical solution only needs to input fresh heating steam during the initial preheating stage, and the heat source in the subsequent stage is provided by the heat pump, effectively reducing the heat loss during the circulation process, making the equipment energy consumption lower and the heat transfer temperature difference smaller. At the same time, it changes from a split structure to an integrated structure, greatly reducing the volume of the overall equipment, thus reducing the installation space of the device and making it more convenient for installation and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of an evaporator of an existing distillation device;

[0013] Figure 2 is a schematic structural diagram of the present invention.

[0014] In the figure: 1. Heater; 2. Evaporator; 3. Distillation column; 4. Condenser; 5. Steam inlet pipe; 6. Return pipe; 7. Steam return pipe; 8. Stabilizing bracket; 9. Heat pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0016] Referring to Figure 1-2 , a structure of an evaporator 2 on a heat pump 9 distillation device includes a heater 1. The evaporator 2 is integrally installed below the heater. One side of the evaporator 2 is provided with a distillation column 3 communicating with the evaporator 2. The top of the distillation column 3 is communicated with the side of the heater 1 through the heat pump 9 and the steam return pipe 7.

[0017] As Figure 1 shown in the structure of the evaporator 2 of the distillation device, continuously input fresh heating steam into the evaporator 2. The fresh heating steam heats the material to the evaporation temperature, causing it to evaporate in the evaporator 2 to form secondary steam. The secondary steam finally enters the distillation column 3, and the distillation column 3 rectifies the material completely. During the entire rectification process, fresh heating steam needs to be continuously input into the heater 1 all the time, and the utilization rate of waste heat is low, and the overall energy consumption of the equipment is large. At the same time, due to the need to facilitate the transportation of steam, the heater 1, the evaporator 2, and the rectifier need to be arranged layer by layer upwards. There are many structural components in itself, and coupled with the layer-by-layer arrangement design, the overall structural components of the distillation device require a huge space, which is very inconvenient for installation and use;

[0018] To solve this problem, a novel evaporator 2 structure on a rectification device is provided in this technical solution. The heater 1 and the evaporator 2 are integrally arranged. By inputting fresh heating steam for preheating into the heater 1, the heating steam heats the material to reach the evaporation temperature, so that the material evaporates into secondary steam and is transported into the rectification column 3. The rectification of the material is completed in the rectification column 3. At the same time, the heat pump 9 is used to heat the temperature-lost steam in the rectification column 3 and send it back into the heater 1 as the heat source for heating the material. In the whole process, only fresh heating steam needs to be input in the initial preheating stage, and the heat source in the subsequent stage is provided by the heat pump 9, effectively reducing the heat loss in the circulation process. At the same time, the structure changes from a split type to an integral type, and the volume of the whole equipment is greatly reduced, thus reducing the installation space of the device and making the installation and use more convenient.

[0019] Further, a steam inlet pipe 5 and a reflux pipe 6 are arranged between the evaporator 2 and the rectification column 3. The steam inlet pipe 5 is arranged above the gas-liquid separation line in the evaporator 2, and the reflux pipe 6 is arranged below the gas-liquid separation line in the evaporator 2.

[0020] Further, a stable support 8 is also arranged between the steam return pipe 7 and the heater 1.

[0021] The stable support 8 is used to improve the installation stability of the steam return pipe 7, so that the steam return pipe 7 is fixed better.

[0022] Further, two groups of pipe orifices are arranged on the heater 1. The two groups of pipe orifices include a steam pipe orifice communicated with an external steam heat source and a steam condensate pipe orifice.

[0023] Further, the upper end of the heater 1 is at the same height as the upper end of the rectification column 3.

[0024] Through this technical solution, the upper end of the heater 1 is at the same height as the upper end of the rectification column 3. At the same time, the lower end of the evaporator 2 is approximately at the same height as the lower end of the rectification column 3. The combined structure makes the heights on the left and right sides approximately equal, so that the overall structure of the equipment is compact, occupies less space, and is more convenient for installation and use. At the same time, the integral structure has a smaller heat transfer temperature difference, less fouling of the equipment, and better use effect.

[0025] Working principle: The heater 1 and the evaporator 2 are integrally arranged. By inputting fresh heating steam for preheating into the heater 1, the heating steam heats the material to reach the evaporation temperature, so that the material evaporates into secondary steam and is transported into the rectifying column 3. The rectification of the material is completed in the rectifying column 3. At the same time, the heat pump 9 is used to heat the temperature-lost steam in the rectifying column 3 and send it back into the heater 1 as the heat source for heating the material. In the whole process, only fresh heating steam needs to be input in the initial preheating stage, and the heat source in the subsequent stage is provided by the heat pump 9, effectively reducing the heat loss in the circulation process. At the same time, it changes from a split structure to an integral structure, greatly reducing the volume of the overall equipment, thus reducing the installation space of the device and making it more convenient for installation and use.

[0026] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0027] In the description of the present invention, the description with reference to terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine the different embodiments or examples described in the present invention and the features of different embodiments or examples.

[0028] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An evaporator structure on a heat pump distillation device, characterized in that: It includes a heater, an evaporator is integrally installed on the lower side of the heater, a rectifying column communicated with the evaporator is arranged on one side of the evaporator, and the top of the rectifying column is communicated with the side part of the heater through a heat pump and a steam return pipe.

2. The evaporator structure on a heat pump rectification device according to claim 1, characterized in that: A steam inlet pipe and a reflux pipe are arranged between the evaporator and the rectifying column, wherein the steam inlet pipe is arranged above the gas-liquid separation line in the evaporator, and the reflux pipe is arranged below the gas-liquid separation line in the evaporator.

3. The evaporator structure on a heat pump rectification device according to claim 1, characterized in that: A stabilizing bracket is further arranged between the steam return pipe and the heater.

4. The evaporator structure on a heat pump rectification device according to claim 1, characterized in that: Two groups of pipe orifices are further arranged on the heater, and the two groups of pipe orifices include a steam pipe orifice communicated with an external steam heat source and a steam condensate pipe orifice.

5. The evaporator structure on a heat pump rectification device according to claim 1, characterized in that: The upper end of the heater is at the same height as the upper end of the rectifying column.

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