Tail gas heat exchanger of diesel engine

Abstract

The invention discloses a tail gas heat exchanger of a diesel engine. The tail gas heat exchanger comprises water collection chambers, expansion joints, a thermal insulation shell, heat exchange tube components, elbows and a support. The left end faces of the heat exchange tube components are in sealed connection with the water collection chambers through the expansion joints, and the right end faces of the heat exchange tube components are in sealed connection with the water collection chambers directly so as to form heat exchanger units. The thermal insulation shell is arranged on the support, and the thermal insulation shell of a three-way structure is transversely provided with two heat exchanger units with the same specification in an inner chamber between a tail gas inlet and a tail gas outlet in parallel. The water collection chambers connected to both ends of the heat exchanger units are exposed out of the thermal insulation shell, connecting pipes of the two adjacent water collection chambers at the left end are respectively taken as introduction or drainage water flow passages, and connecting pipes of two adjacent water collection chambers at the right end are connected to form an integrated structure through an elbow string. According to the invention, through heat exchange of circulating cooling water and waste gas, the waste heat is utilized, and the national energy conservation and emission reduction policy is realized. The invention is particularly matched with a high-power diesel engine fixed by a working position.

Description

technical field [0001] The invention relates to a gas-liquid heat exchange device, in particular to a heat exchange device using exhaust gas from a diesel engine as a heat source. Background technique [0002] When the diesel engine is working, the temperature of the exhaust gas continuously discharged from the exhaust port is as high as 300 ° C ~ 450 ° C. In addition to harmful substances such as nitrogen oxides and carbon particles that pollute the environment, the exhaust gas is also accompanied by a large amount of heat energy emission, especially for high-power diesel engines. The exhaust emission is large, and the heat energy loss is greater. The supporting diesel engines in the project usually emit exhaust gas directly. Even if a purification device is added, it can only purify carbon particles and reduce the pollution of visible objects, while the heat energy in the exhaust gas is not utilized. If the exhaust gas emitted by the diesel engine is not comprehensively t...

AI Technical Summary

Problems solved by technology

The supporting diesel engine in the project usually directly discharges the exhaust gas. Even if a purification device is installed, it can only purify carbon particles and reduce the pollution of visible objects, but the heat energy in the exhaust gas is not utilized.

If the exhaust gas emitted by the diesel engine is not comprehensively treated, it will not only waste heat energy, but also deteriorate the surrounding working environment

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