Integrated combined heat exchanger

Abstract

The invention discloses an integrated combined heat exchanger. The integrated combined heat exchanger comprises a tube box, a shell and a U-shaped heat exchange tube bundle. The tube box is divided bytube pass partition plates into four tube passes, and a tube winding tube bundle is arranged. The shell is connected with the rear end of the tube box through a tube plate, and a tube pass dividing partition plate with the length smaller than the length of the shell is transversely arranged in the shell. The U-shaped heat exchange tube bundle comprises overheating section tube bundles and evaporation section tube bundles, all of which are arranged in an overheating section area and an evaporation section area in a one-to-one correspondence manner, the total length of the evaporation section tube bundles is equal to the length of the tube pass dividing partition plate, and the length of straight tube sections of the overheating section tube bundles is equal to the length of the tube pass dividing partition plate. The vertical distance between a row of tube bundles on the tops of the evaporation section tube bundles and the tube pass dividing partition plate is not smaller than 125 mm,at least one row of heat exchange tubes in the evaporation section tube bundles are higher than the liquid level in the shell, and the vertical distance between the row of heat exchange tubes and thenext row of heat exchange tubes is larger than the normal tube distance of the evaporation section tube bundles. The heat exchanger can be used for multiple occasions, and the utilization rate and heat transfer efficiency are improved.

Description

technical field [0001] The invention relates to chemical equipment, in particular to an integrated combined heat exchanger. Background technique [0002] Most of the processes in petroleum, chemical, low temperature, power generation and other industries have heat transfer processes such as evaporation, heating, etc., and the heat transfer process requires certain heat exchange equipment to complete. [0003] Superheated steam is often used in many industries. Most superheated steam comes from saturated steam. Saturated steam is generally obtained through a reboiler. The obtained saturated steam is then heated through a superheater to obtain superheated steam. In this way, at least two replacements are required. Thermal equipment connected in series. A kettle-type reboiler is generally used to obtain saturated steam with a large evaporation rate, but the utilization rate of the kettle-type reboiler equipment is low. If the two equipments can be integrated, the piping and ci...

AI Technical Summary

Problems solved by technology

A kettle-type reboiler is generally used to obtain saturated steam with a large evaporation rate, but the utilization rate of the kettle-type reboiler equipment is low. If the two equipments can be integrated, the piping and civil structure of the heat exchanger can be reduced ;Shorten the cleaning cycle of the heat exchanger, easy to operate; reduce floor space, save space, reduce investment and operating costs

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