Engine tail gas diluting and cooling device based on Bernoulli law and debugging method and adjusting method

Abstract

The invention discloses an engine tail gas diluting and cooling device based on a Bernoulli law. The device comprises a diluting box in diluting connection with a cooling pipe; a flow expanding cylinder communicating with the cooling pipe is arranged in the diluting box; the side wall of the diluting box is inwards connected with a gas sucking port; the end, towards the gas sucking port, of the flow expanding cylinder is connected with a horn port; an annular gap is surrounded between the horn port and the gas sucking port; an intake cavity is surrounded between the flow expanding cylinder andthe diluting box; and the intake cavity is connected with an intake pipe. The invention further discloses a corresponding debugging method and a tail gas adjusting method. Negative pressure can be generated in the annular gap; and environmental air is sucked into the flow expanding cylinder for mixing with exhausted gas of an engine to reduce the exhaust temperature to prevent harm caused by high-temperature tail gas. The stepper debugging method is adopted without needing linear debugging, so that the debugging workload is greatly reduced, and the debugging efficiency is improved. The tail gas adjusting method is provided with three modes to meet the demands in different places.

Description

technical field [0001] The invention relates to the technical field of engine exhaust post-processing technology, in particular to exhaust gas cooling technology. Background technique [0002] The exhaust temperature of the engine is generally between 400°C and 700°C. After being cooled by the traditional exhaust manifold and catalytic muffler, the outlet temperature is also 150°C to 300°C. However, some special places have strict restrictions on the exhaust temperature, such as mine operations, dust workshop operations, etc. There is a large amount of combustible dust in relatively closed places such as workshops or mines that contain dust. The high-temperature exhaust gas emitted by the engine may cause fires and explosions, and the closed places are relatively small, with intensive personnel traffic, and the high-temperature exhaust gas emitted by the engine may also cause burns. danger. Traditional cooling methods rely on natural heat convection and heat radiation, and...

AI Technical Summary

Problems solved by technology

However, some special places have strict restrictions on the exhaust temperature, such as mine operations, dust workshop operations, etc.

There is a large amount of combustible dust in relatively closed places such as workshops or mines that contain dust. The high-temperature exhaust gas emitted by the engine may cause fires and explosions, and the closed places are relatively small, with intensive personnel traffic, and the high-temperature exhaust gas emitted by the engine may also cause burns. danger

Traditional cooling methods rely on natural heat convection and heat radiation, and it is difficult to reduce the exhaust temperature below the dangerous factor

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