Internal part for reaction or heat exchange equipment

Abstract

The invention relates to an internal part for reaction or heat exchange equipment. The internal part is a heat exchange plate pair with n-1 layers of chambers (n is no less than 2), and the heat exchange plate pair is formed through connection of welding spots with edge weld joints as well as through high pressure bubbling; the welding spots are formed through welding of the corresponding positions of n metal plates, and can be circular or polygonal. The multiple welding spots are distributed on the metal plates, and the distance between every two adjacent is 20-100 mm; and the diameter of thewelding spots is 1-20 mm. Compared with the prior art, the internal part has the beneficial effects that the heat exchange of multiple flows can be achieved, and the simultaneous heat exchange of multiple media is finished; the reaction temperature is controlled accurately, and the reaction selectivity is improved; and the internal part has the advantages of wide application range, good heat transfer effect, low pressure drop and the like.

Description

technical field [0001] The invention relates to a heat exchange assembly, in particular to an internal part for reaction or heat exchange equipment. Background technique [0002] As the heat exchange internals of common fixed-bed reactors and heat exchangers, the heat transfer coefficient of the heat exchange tubes is not high. Under the same heat exchange, the required volume of the reactor and heat exchanger is relatively large; at the same time, there are The workload of catalyst loading is heavy, the maintenance is complicated, the pressure drop is large, the energy consumption is high, and the problems of overheating or sudden stop of reaction are prone to occur. Therefore, the application of plate reactors has received extensive attention. Plate reactors and plate heat exchangers composed of plate heat exchange internals have high heat transfer coefficient, small size, light weight, low fouling factor, convenient catalyst loading and unloading, and wide application ran...

AI Technical Summary

Problems solved by technology

[0002] As the heat exchange internals of common fixed-bed reactors and heat exchangers, the heat transfer coefficient of the heat exchange tubes is not high. Under the same heat exchange, the required volume of the reactor and heat exchanger is relatively large; at the same time, there are The workload of catalyst loading is heavy, the maintenance is complicated, the pressure drop is large, the energy consumption is high, and the problems of overheating or sudden stop of reaction are prone to occur.

Therefore, the application of plate reactors has received extensive attention. Plate reactors and plate heat exchangers composed of plate heat exchange internals have high heat transfer coefficient, small size, light weight, low fouling factor, convenient catalyst loading and unloading, and wide application range. At present, most of the commonly used plate heat exchange internals are single-layer inner channels, but with the development of industrial technology, more and more processes that require multiple media for heat exchange, such as polypropylene process, dual heat source heat pump and natural cooling system, etc., in view of the simultaneous heat exchange requirements of multiple media in the polypropylene process, the conventional practice is to use multiple tube heat exchangers to achieve the effect of simultaneous cooling (or heating). The problem of large area and low heat transfer efficiency

A flat-flow multi-media heat exchanger (CN104807356A) proposes a tubular heat exchanger capable of simultaneously exchanging heat in three media. The defect of this heat exchanger is that the flow of the medium is mostly laminar flow, and the heat exchange efficiency is low , large pressure drop

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