Teflon cold and heat exchanger

Abstract

The invention discloses a Teflon cold and heat exchanger comprising a pipe shell, wherein the upper end of the pipe shell is provided with a cold water and hot water outlet; the lower end of an outer pipe is provided with a cold water and hot water inlet; the cold water and hot water inlet and the cold water and hot water outlet are communicated with the inner cavity of the pipe shell; the inner cavity of the pipe shell is also internally provided with a Teflon pipe bundle; the Teflon pipe bundle is made by welding tens of or hundreds of Teflon capillaries in parallel; after being sealed, the upper end of the Teflon pipe bundle serves as an exchanged medium outlet and is fixedly connected with an exchanged medium outlet pipeline; and after being sealed, the lower end of the Teflon pipe bundle serves as an exchanged medium inlet and is fixedly connected with an exchanged medium inlet pipeline. The exchanger has the advantages of small volume, large flow, high heat transfer coefficient and light weight, and energy and materials can be greatly saved. Because the environmental temperature of the inner cavity of the external pipe is uniform, outlet temperature of exchanged liquid flowing in the Teflon capillaries has extremely small deviation, and the Teflon cold and heat exchanger can be used for precisely controlling the temperature of fluid, which can not be realized by a common exchanger.

Description

technical field [0001] The invention relates to a cold and heat exchanger, in particular to a tube-bundle Teflon cold and heat exchanger. Background technique [0002] The cold heat exchanger is a device for cold and heat exchange of liquid, which is widely used in the field of liquid heat exchange. Existing cold and heat exchangers are generally divided into two types: inner-tube heat exchange and outer-tube heat exchange. In-tube heat exchange type cold and heat exchangers are generally made of metal, the outer shell is a metal tube, and the inner is a serpentine coil. Due to the characteristics of the metal tube in the shell, the radius of the bend tube is large and the distance between the tubes is relatively large, resulting in exchange The unit heat exchange area of ​​the device is small, the volume is large, and it is very cumbersome. However, only stainless steel and titanium exchangers can be used for acid-base potions, but when encountering strong acids, this met...

AI Technical Summary

Problems solved by technology

In-tube heat exchange type cold and heat exchangers are generally made of metal, the outer shell is a metal tube, and the inner is a serpentine coil. Due to the characteristics of the metal tube in the shell, the radius of the bend tube is large and the distance between the tubes is relatively large, resulting in exchange The unit heat exchange area of ​​the device is small, the volume is large, and it is very bulky

However, only stainless steel and titanium exchangers can be used on acid-base potions, but when encountering strong acids, this metal exchanger has no solution

At present, only Teflon tubes can be used in the heat exchange type outside the tube. Because the Teflon tube has a large diameter, thick tube wall, and cannot be welded, it can only be connected by a single tube or a few tubes. This will result in long tubes, large volumes, and low flow rates, which will reduce the unit heat transfer area, relatively reduce the heat transfer coefficient, and cause waste of energy and materials.

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