Tail gas waste heat recovery and turbine acceleration device

Abstract

The invention discloses an indirect-recovery type reciprocating engine. The engine is used for converting waste heat of a turbine or industrial tail gas into mechanical work. Water mist is sprayed periodically through an exhaust pipe, backpressure of the turbine is reduced, and more tail gas waste heat is converted into the turbine mechanical work. The pressurization degree of the reciprocating engine can be greatly improved, and the power increase amplitude is comparable to that of an afterburning pressurization system. An air excess coefficient is greatly increased, and the oil consumption is obviously reduced. The engine can also be used for air conditioning refrigeration.

Description

technical field [0001] The invention relates to the field of utilization of piston engine, gas turbine or industrial tail gas waste heat, especially the field of indirect use of tail gas waste heat to do mechanical work. Background technique [0002] The existing waste heat recovery methods of exhaust gas are as follows: [0003] 1. Keep warm. But demand is not big; For example " the muffler for the heavy-duty truck that utilizes waste heat of engine to heat cargo box, publication (announcement) number: CN202338413U ". [0004] Refrigeration. The structure of absorption air conditioner is very complex and bulky. The vacuum degree is very high. Once the pipeline is corroded and leaks, the refrigeration capacity will be lost; the maintenance is cumbersome. Moreover, the thermal inertia of the pipeline and the refrigerant is large, and it takes a while to cool after starting. Lithium bromide thermal refrigeration on internal combustion engines cannot be applied to running ...

AI Technical Summary

Problems solved by technology

However, scale will inevitably shorten engine life, improving water purity can alleviate this problem

Due to the drastic change of the metal temperature of the cylinder, the gap between the piston and the cylinder liner must be increased, resulting in a significant increase in the impact force between the piston and the cylinder liner, and the life of the engine is significantly shortened

Due to the high friction of the piston mechanism of the engine body, the net mechanical work that can be recovered is very limited

The average pressure of the 5th and 6th strokes is lower than that of the four-stroke, and at the same crankshaft speed, the power density of the six-stroke is lower than that of the four-stroke

[0018] On the other hand, for all devices using regenerators, the efficiency of converting exhaust waste heat into mechanical work is significantly lower than that of devices without regenerators

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