U-shaped heat pipe heat exchange element and u-shaped heat pipe heat exchanger integrated with electrostatic precipitator

Abstract

The invention discloses U-shaped heat pipe heat exchange elements and a U-shaped heat pipe heat exchanger integrated with an electrostatic dust collector. Each U-shaped heat pipe heat exchange element is composed of a 180-degree bend and two continuous-extending straight sections, wherein the bends are formed by whole bending. The U-shaped heat pipe heat exchanger comprises a cooling working medium inlet collecting box, a hot working medium outlet collecting box and a plurality of cooling working medium sleeves communicated with the cooling working medium inlet collecting box and the hot working medium outlet collecting box, and further comprises the U-shaped heat pipe heat exchange elements used as heat pipes. The upper portions of the heat pipes are inserted into the cooling working medium inlet collecting box and inserted into the cooling working medium sleeves. The top ends of the two straight sections of each heat pipe are sealed and inserted into the hot working medium outlet collecting box. The portions, which are not inserted into the cooling working medium inlet collecting box, of the heat pipes are evaporation heat absorption sections. The portions, inserted into the cooling working medium inlet collecting box, of the heat pipes, are condensation heat emission sections. The evaporation heat absorption sections are installed inside the middle of an inlet extension section of the electrostatic dust collector. The condensation heat emission sections are arranged at the upper portion outside a flue in the middle of the inlet extension section of the electrostatic dust collector. The U-shaped heat pipe heat exchange elements and the U-shaped heat pipe heat exchanger are suitable for heat exchanger structures of large-scale equipment in heat-engine plants, the petrochemical industry and the like.

Description

technical field [0001] The invention relates to the technical field of heat pipe heat exchangers, in particular to a U-shaped heat pipe heat exchange element and a U-shaped heat pipe heat exchanger integrated with an electrostatic precipitator. Background technique [0002] When flue gas from boilers and industrial processes flows through the heating surface, its heat distribution is limited to a certain extent, resulting in high flue gas temperatures at the outlet of the air preheater and the inlet of the dust collector. In order to make full use of the heat in the flue gas, It can be realized by setting a waste heat recovery device in the flue gas channel before the bell mouth of the inlet section of the dust collector. However, in some cases, due to the limited space, the arrangement of the flue is extremely compact, and there is no straight section of the flue between the air preheater and the bell mouth of the dust collector inlet section to arrange the waste heat recov...

AI Technical Summary

Problems solved by technology

[0005] However, in long-term use, the heat pipe is generally a straight pipe structure, and the working liquid is filled in the straight pipe, which requires sealing and welding at both ends; the heat pipe with the straight pipe structure has a fixed heat transfer limit of the working fluid in the pipe, and cannot adapt to the temperature change condition; The structure of the heat pipe is in the state of a cantilever beam in the heat exchanger, and its rigidity is small. It is only suitable for small heat exchangers and is not suitable for the heat exchanger structure of large-scale equipment such as thermal power plants and petrochemical industries; at the same time, the heat pipe with a single straight pipe structure , both ends of the heat exchanger need to be sealed and welded. When the heat exchanger tube bundle is dense, the welding workload will increase exponentially, and the production cycle will be long, which limits the design and manufacture of large heat pipe heat exchangers. For a long time, straight heat pipes can only be used for small The size of the heat exchanger and the enlargement of the heat pipe heat exchanger are greatly limited

Images