Combined heat exchange tube shell-and-tube heat exchanger

Abstract

The invention relates to a combined heat exchange tube shell-and-tube heat exchanger, which comprises a first screen plate, a pot body, a whirl plate, a second screen plate and a heat exchange tube, and is characterized in that: the shell-and-tube heat exchanger also comprises a sealing plate and a sealing ring; the other end of the heat exchange tube is provided with a tube sleeve by seal welding; the sealing plate is provided with a sealing hole corresponding to a tube hole on the second screen plate; one end of the sealing ring is assembled in the tube sleeve, while the other end is assembled in the sealing hole; the outer wall of the sealing ring is provided with two annular seal grooves in which O-shaped rings are arranged to respectively seal the outer wall of the sealing ring and the inner wall of the sealing hole; and the sealing plate is compressed and fixed through the second screen plate and a second seal head which are firmly connected. The combined heat exchange tube shell-and-tube heat exchanger has simple and reasonable structure; the heat exchange tube adopts a combined structure and is arranged in a sealing way; parts for sealing are all made of tetrafluoroethylene materials, and are corrosion-resistant and high-pressure resistant; and the inside of the tube hole on the first screen plate of a tube plate is welded with the tube wall of the heat exchange tube in a sealing way through an arranged turnup edge so as to effectively avoid the enamel peeling phenomenon.

Description

technical field [0001] The invention belongs to the technical field of chemical machinery equipment, and in particular relates to a combined heat exchange tube and tube heat exchanger. Background technique [0002] The tube-and-tube heat exchanger is a commonly used chemical machinery and equipment, which is used for heat exchange in the chemical production process. The heat exchange tubes of the existing tube-and-tube heat exchanger are generally made of stainless steel or carbon steel. The heat conduction of the heat pipe is relatively fast, and the heat exchange efficiency is relatively high. However, due to the complex types of materials that the heat exchanger contacts, when it is used to deal with some corrosive materials or materials that require no contact with metal ions, the heat exchange tube of this material use is restricted. In the prior art, the glass-lined layer is usually used to improve the corrosion resistance of the equipment at the part of the heat exch...

AI Technical Summary

Problems solved by technology

[0002] The tube-and-tube heat exchanger is a commonly used chemical machinery and equipment, which is used for heat exchange in the chemical production process. The heat exchange tubes of the existing tube-and-tube heat exchanger are generally made of stainless steel or carbon steel. The heat conduction of the heat pipe is relatively fast, and the heat exchange efficiency is relatively high. However, due to the complex types of materials that the heat exchanger contacts, when it is used to deal with some corrosive materials or materials that require no contact with metal ions, the heat exchange tube of this material use is restricted

In the prior art, the glass-lined layer is usually used to improve the corrosion resistance of the equipment in the part of the heat exchanger that is in contact with the material, but this kind of coating requires the entire heat exchanger to have an integrated structure inside, otherwise it is easy to cause porcelain explosion, etc. situation, the production is more difficult, and the defective rate is higher

In addition, because the cost of making heat exchangers made of steel is relatively high, there are also heat exchange tubes made of glass. Although the heat exchange tubes made of glass have strong corrosion resistance, they are not pressure-resistant and easy to break insurmountable defects

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