Evaporation type alcohol dehydration and concentration device

Abstract

The utility model relates to a dehydration and concentration device, in particular to an evaporation type alcohol dehydration and concentration device. Comprising a heat exchanger, a separator and a circulating pump which are connected in sequence, and further comprises a compressor which is arranged at an air outlet of the separator and an air inlet of the heat exchanger. According to the evaporation type alcohol dehydration and concentration device provided by the utility model, the heat of water vapor formed in the alcohol dehydration process is recycled through mechanical vapor recompression, so that the heat can be recycled, and only a small amount of electric energy is needed to maintain operation.

Description

Technical Field

[0001] The utility model relates to a dehydration and concentration device, in particular to an evaporation type alcohol dehydration and concentration device. Background Art

[0002] At present, alcohol dehydration and concentration mainly adopts distillation process, which uses the heat exchange between raw steam and materials and the characteristics that alcohol substances and water do not form azeotropes to separate alcohols and water. The water vapor formed in the alcohol dehydration process is directly cooled and treated as wastewater. A large amount of heat energy is taken away in the cooling process, resulting in energy waste.

[0003] like Figure 3 As shown, the secondary steam generated by the boiling of the material is not utilized, but discharged after being cooled by circulating water, resulting in a large amount of heat waste and increased production costs. Utility Model Content

[0004] In order to solve the problem of high production cost caused by high energy consumption, the utility model provides an evaporation type alcohol dehydration and concentration device, and the specific technical solution is as follows:

[0005] An evaporation type alcohol dehydration and concentration device comprises a heat exchanger, a separator and a circulation pump which are connected in sequence, wherein the circulation pump is also connected to the heat exchanger, and further comprises a compressor which is arranged at the air outlet of the separator and the air inlet of the heat exchanger.

[0006] Preferably, the heat exchanger is a plate heat exchanger.

[0007] Compared with the prior art, the utility model has the following beneficial effects:

[0008] The utility model provides an evaporation type alcohol dehydration concentration device which recovers the heat of water vapor formed in the alcohol dehydration process through mechanical vapor recompression, so that the heat can be recycled and only a small amount of electric energy is needed to maintain operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of embodiment 1;

[0010] Figure 2 is a structural schematic diagram of embodiment 1;

[0011] Figure 3 It is a schematic diagram of the prior art;

[0012] Figure 4 It is a structural schematic diagram of the prior art. DETAILED DESCRIPTION

[0013] The utility model is now further described with reference to the accompanying drawings.

[0014] Embodiment 1

[0015] like Figure 1 and Figure 2 As shown, an evaporation type alcohol dehydration and concentration device includes a compressor, a heat exchanger, a separator and a circulating pump. The heat exchanger is provided with a steam inlet, a condensed water outlet communicating with the steam inlet, a material inlet and a material outlet. The material inlet is connected to the separation outlet of the separator through the circulating pump, and the material outlet is connected to the separation feed port of the separator. The compressor is respectively connected to the separation outlet and the steam inlet of the separator for compressing water vapor and mixing it with the steam at the steam inlet.

[0016] The secondary steam generated by the boiling of the material is utilized, and the heat enthalpy of the secondary steam is increased by recompression by the compressor to reheat the material, which greatly reduces the use of raw steam, reduces the use of circulating water, and reduces production costs.

[0017] The water vapor (secondary steam) generated during the alcohol dehydration process is compressed by a mechanical steam compressor, and its temperature and pressure are increased before condensation in a plate heat exchanger to transfer heat to the material. The energy balance during the alcohol dehydration process is maintained only by the compressor. A small amount of electrical energy is used to improve the thermal grade of the secondary steam, and the latent heat of vaporization of the secondary steam is efficiently recovered, thereby achieving the purpose of energy saving.

[0018] Embodiment 2

[0019] Based on the above embodiment, the heat exchanger is a plate heat exchanger. By adopting the plate heat exchanger, the heat exchange efficiency is improved, the space occupied is reduced, the equipment construction investment is low, the material residence time is short, the material load is small, and the inspection and maintenance are convenient.

[0020] like Figure 3 and Figure 4 As shown, the existing evaporative concentration device heat exchanger mainly adopts shell-and-tube heat exchanger, which occupies a large area, is high, uses a large amount of space, and requires a large space for equipment placement. By using a plate heat exchanger instead of a shell-and-tube heat exchanger, the space inside the heat exchanger is reduced under the condition of the same heat exchange area, the material load is greatly reduced, and the space volume is reduced by 50%. At the same time, the heat exchange efficiency is significantly improved under the condition of achieving the same heat exchange effect.

[0021] For example, the original plan for the 50kg / h MVR pilot plant for alcohol concentration in the workshop was 5.5m 2 The height of the shell and tube heat exchanger is nearly 4.5m, and the new solution is 5.5m 2 The height of the plate heat exchanger is 0.48m, which greatly reduces the building height.

[0022] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the claims of the present invention.

Claims

1. An evaporation type alcohol dehydration and concentration device, comprising a heat exchanger, a separator, and a circulation pump connected in sequence, wherein the circulation pump is also connected to the heat exchanger, characterized in that: Also includes: A compressor is arranged at the air outlet of the separator and the air inlet of the heat exchanger.

2. The evaporation type alcohol dehydration and concentration device according to claim 1, characterized in that: The heat exchanger is a plate heat exchanger.

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