Gas-fired internal combustion engine type mechanical steam recompression system and control method thereof

Abstract

The invention belongs to the field of sewage treatment, and relates to a steam compression system, particularly to a gas-fired internal combustion engine type mechanical steam recompression system anda control method thereof. The gas-fired internal combustion engine type mechanical steam recompression system comprises a gas-fired internal combustion engine and a sewage treatment system, wherein the 1# heater (20) of the sewage treatment system is connected to the gas discharge of the gas-fired internal combustion engine (23), and a steam compressor (8) is additionally arranged between the buffer tank (11) of the sewage treatment system and the high temperature and high pressure steam branch pipeline (18) on the 1# heater (20). According to the present invention, the gas-fired internal combustion engine uses natural gas as the fuel, and the power output shaft of the gas-fired internal combustion engine drives the steam compressor; the steam compression system uses the centrifugal compressor to reduce the pressure inside the evaporator so as to lower the boiling temperature of the water and increase the evaporation efficiency; and the gas-fired internal combustion engine type mechanical steam recompression system uses high-temperature tail gas to heat the sewage so as to achieve the evaporation of sewage.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and relates to a steam compression system, in particular to a gas internal combustion engine type mechanical steam recompression system and a control method. Background technique [0002] Sewage purification is divided into chemical methods and physical methods. Chemical methods pollute the environment, and physical methods include precipitation and evaporation. At present, coal-fired evaporation, which is often used, has low efficiency and pollutes the environment. The mechanical recompression system consumes a lot of power and the energy utilization rate is not high. . Contents of the invention [0003] The purpose of the invention is to organically combine gas internal combustion engine technology and sewage heating and evaporation treatment technology to construct a new type of energy-saving and environment-friendly sewage treatment device. [0004] The technical scheme of the present inven...

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Problems solved by technology

[0002] Sewage purification is divided into chemical methods and physical methods. Chemical methods pollute the environment, and physical methods include precipitation and evaporation. At present, coal-fired evaporation, which is often used, has low efficiency and pollutes the environment. The mechanical recompression system consumes a lot of power and the energy utilization rate is not high.

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