Piston type thermodynamic gas compressor

Abstract

The invention relates to a thermal compressor for recycling low pressure steam in heating system, especially the thermal compressor for improving heating supply steam pressure in steam power plant, comprising two cylinders with inlet and outlet port of high and low pressure steam (1), coaxial piston (2) in each cylinder and control system for it. Compared with prior technology, in the invention according to the principle that low pressure steam is not contacted with high pressure steam, the pressure of low pressure steam rises by low pressure steam in compressed way of piston and two cylinders work in turn so that the press of low pressure steam rises to destined value, outlet one-way valve of low pressure steam is opened and the steam is transported into steam supply pipe by the control system. It is energy saving and efficiency improving with two to four times by experiment testifying. It is no constrained by the parameter of high and low pressure steam and wide application while it is provided with simple structure and low cost.

Description

technical field [0001] The invention relates to a thermodynamic steam compressor for recovering low-pressure steam in a steam heat supply system, in particular to a thermodynamic steam compressor for increasing the pressure of heating steam in a thermal power plant. Background technique [0002] Enterprises that use steam in the production process generally have exhaust steam emissions, which not only pollutes the environment but also wastes energy. In order to recycle the exhaust steam, it is necessary to increase the pressure of the exhaust steam. In the past, there were two methods of increasing vapor pressure, mechanical compression and thermal compression. Mechanical compression consumes electricity, while thermal compression directly consumes heat energy. The direct consumption of thermal energy is more economical than the consumption of electrical energy, because the conversion process from thermal energy to electrical energy is reduced and the conversion loss is re...

AI Technical Summary

Problems solved by technology

There are generally two ways of thermal compression, one is the steam injection compressor, the other is to use the steam turbine to directly drive the steam compressor. The ratio of the pressure drop of the low-pressure steam to the pressure rise of the low-pressure steam can have a higher efficiency within a certain range. Generally, the efficiency is low or the structure of the turbocompressor unit is complicated and the cost is increased. Generally, the steam injection thermal compressor The efficiency is 10-20%, the highest is 50%, and the efficiency of the turbo-compressor unit is generally only 40-60%. In this way, the thermal power station can use the fresh steam of the boiler as power to increase the steam extraction pressure of the steam turbine to meet the needs of heat users. The use requirements, because of their low efficiency, often cannot meet the requirements

[0003] The reason for the low efficiency of the steam injection thermal compressor is mainly due to the direct contact and mixing of the high-speed steam flow and the low-speed steam flow, resulting in a large irreversible loss; the reason for the low efficiency of the turbine-driven steam compressor unit is due to The pressure drop of high-pressure steam and the pressure rise of low-pressure steam correspond to different optimal speeds and stages. If the efficiency requirements are met, the structure will be very complicated and the cost will increase. If the structure is simplified, the efficiency will be sacrificed.

Images