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Tubular film evaporator

A thin-film evaporator and tubular technology, which is applied in the field of production equipment, can solve the problems of poor film-forming effect and low work efficiency of materials, and achieve the effects of reliable use, high work efficiency and good film-forming effect.

Active Publication Date: 2012-04-25
YANGZHOU HUITONG CHEM ENG TECHN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention provides a technical solution of a tubular thin film evaporator, aiming to solve the problems of poor film-forming effect and low work efficiency in the prior art

Method used

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  • Tubular film evaporator
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  • Tubular film evaporator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as Figure 1-3 As shown, it is a tubular thin-film evaporator, and its shell 11 is a pressure-bearing shell, so that it can still keep its shape when it is vacuumed. The top of the shell 11 is provided with a feed port 13 and a vacuum pumping port. 12. The feed port 13 can be set at the center of the top of the housing 11, and the bottom of the housing 11 is provided with a discharge port 1, preferably at the lowest position. The housing 11 is arranged in an array below the feed port 13. There are multiple groups of evaporation units, each group of evaporation units includes a material receiving funnel 8 and a heat exchange tube 7, the material receiving funnel 8 is funnel-shaped, its upper part is large and its lower part is small, the horizontal section of the upper part is square, and the horizontal section of the bottom is circular , the heat exchange tube 7 is set upright and interspersed in the round hole at the bottom of the receiving funnel 8, and there is ...

Embodiment 2

[0024] Such as Figure 4-5 , is another tubular thin film evaporator, comprising a shell 11, the top of the shell 11 is provided with a feed port 13 and a vacuum pumping port 12, the bottom of the shell 11 is provided with a discharge port 1, and the inside of the shell 11 is located at the inlet There are multiple groups of evaporation units below the feed port 13, each group of evaporation units includes a material receiving funnel 8 and a heat exchange tube 7, the heat exchange tube 7 is vertically arranged and inserted into the round hole at the bottom of the material receiving funnel 8, and the heat exchange tube 7 There is an annular gap 7 between the periphery and the receiving funnel 8, and multiple groups of evaporation units are arranged in an array; the horizontal sections of the upper and bottom of the receiving funnel 8 are circular; the upper opening of the receiving funnel 8 is connected with a blanking tray , the outer periphery of the blanking tray 10 and the ...

Embodiment 3

[0026] Such as Figure 6 As shown, it is a third kind of tubular thin film evaporator, which is different from the above two embodiments in that: the protruding end 3 of the inner tube 602 and the inlet and outlet of the heating medium 5 are arranged at the upper end of the heat exchange tube 7 and located at the adjacent Above the material funnel 8 , the protruding end 3 of the inner pipe 602 , the heating medium inlet and outlet 5 and the heating medium conveying pipe are all arranged in the casing 11 .

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Abstract

The invention discloses a tubular film evaporator for polyester production, comprising a shell which is provided with a feed inlet and a vacuum extract opening at the top. A feed outlet is arranged at the bottom of the shell. At least a group of evaporation units is arranged below the feed inlet inside the shell, and each group of evaporation units comprises a material receiving funnel and a heatexchange tube. The heat exchange tube is arranged perpendicularly and inserted in the circular hole at the bottom of the material receiving funnel. A circular gap is retained between the periphery ofthe heat exchange tube and the material receiving funnel. During polyester production, materials flows downwards from the circular gap retained between the periphery of the heat exchange tube and flows downwards in a film shape along the surface of the heat exchange tube and meanwhile, heat exchange occurs between the materials and the heat exchange tube, and the byproducts generated by the reaction overflow continuously and are extracted by a vacuum pump. Because the materials are distributed outside the heat exchange tube, the problem of blockage is solved. The tubular film evaporator has the advantages of good film forming effect, reliable use and high work efficiency and can be used in production of polymers of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylece terephthalate (PBT), PTT and the like.

Description

technical field [0001] The invention relates to a production equipment in the polyester industry, in particular to an evaporator used in polycondensation reaction. Background technique [0002] In the existing polyester production, as the polycondensation reaction proceeds, the viscosity of the material gradually increases. High-viscosity materials will hinder the rapid escape of reaction by-products and delay the progress of the reaction. It is necessary to make the material form a larger The surface area of ​​the film is heated at the same time, so that the reaction by-products can escape from the material smoothly, and the reaction can go on better. In order to keep the reaction going, at present, an evaporator is used. Its structure mainly includes a shell. The top of the shell is provided with a feed port and a vacuum pumping port. The bottom of the shell is provided with a discharge port. There are two support plates under the mouth, and several tubes are arranged bet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D1/06
CPCB01D1/065
Inventor 严旭明
Owner YANGZHOU HUITONG CHEM ENG TECHN