Fixed tube-sheet heat exchanger with temperature control function

Abstract

The invention relates to a fixed tube-sheet heat exchanger with a temperature control function. A head structure and a tail structure are respectively arranged at two ends of a shell, at least one heat exchange pipe is arranged in the shell, tube pass fluid flows out from a head cavity and flows in a tail cavity from the heat exchange pipe, a shell pass inlet and a shell pass outlet are arranged on the shell, the fixed tube-sheet heat exchanger with the temperature control function is characterized in that a central channel is also arranged in the shell, a heat-insulating layer is arranged on the inner wall of the central channel, the tube pass fluid flows out of the head cavity and flows in the tail cavity also by the central channel, the heat exchange between the tube pass fluid in the central channel and shell pass fluid can be isolated by the heat-insulating layer, at least one annular baffle plate and at least disc type baffle plate are also simultaneously arranged in the shell, and the tail cavity at least comprises one mixed cavity. The fixed tube-sheet heat exchanger with the temperature control function has the following beneficial effects that the heat exchange coefficient of the heat exchanger is effectively increased, the heat exchange area can be reduced, and the manufacturing cost of equipment can be lowered; the temperature control structure can ensure the running stability of the heat exchanger under variable working conditions, and guarantee the steady-state operation of downstream equipment of the heat exchanger.

Description

technical field [0001] The invention relates to a heat exchanger. Background technique [0002] With the gradual increase of the country's requirements for low-carbon and energy-saving, the rough production methods of the chemical industry are becoming less and less suitable for the development requirements of modern industry. Lots of improvement work. Among them, the recovery and utilization of waste heat in the production process of chemical products has become an effective way to improve energy utilization. As the main equipment for waste heat recovery, the heat exchanger is becoming more and more important in the chemical process. According to statistics, the number of heat exchangers accounts for about 40% of the chemical equipment used, and its investment cost also reaches more than 20%. [0003] The heat exchangers currently used mainly have the following disadvantages: under the condition of large load changes, the heat exchanger cannot maintain steady-state operat...

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Problems solved by technology

[0003] The heat exchangers currently used mainly have the following disadvantages: under the condition of large load changes, the heat exchanger cannot maintain steady-state operation; after the tube-side fluid exchanges heat with the shell-side fluid, its outlet temperature often cannot reach Design temperature such that equipment downstream of the heat exchanger cannot maintain steady state operation

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