Distributed pneumatic-Rankine combined cycle combined cooling heating and power device

Abstract

The invention relates to a distributed pneumatic-Rankine combined cycle combined cooling heating and power device. The distributed pneumatic-Rankine combined cycle combined cooling heating and power device is characterized in that the exhaust of a pneumatic machine is adopted as a heat source of a Rankine cycle waste heat boiler, a steam Rankine cycle system adopts a positive pressure and close type operating mode, a condenser of outlet dead steam of a steam turbine is utilized as a heat source of a heating system and an absorption refrigeration machine, and the cascading use of an energy source is realized; and high grade energy of a recycled fuel is used for generating electricity, evaporative capacity (or the heating load of 0.7 MW) of per ton can recover electric quantity which is more than 340 degrees, meanwhile, the cooling heating combination is realized, and the waste heat of fume is recovered in a high efficiency manner. A water treatment system of the steam Rankine cycle system causes no or only a little of waste acid and waste caustic to generate, and an oxygen corrosion and scaling problem of the boiler is effectively avoided. Therefore, energy conservation, environmental friendliness and social benefits are very notable.

Description

technical field [0001] The invention relates to a distributed pneumatic-Rankine combined cycle combined cooling, heating and power supply device, specifically belonging to the technical field of energy saving and environmental protection. Background technique [0002] As a special pressure-bearing equipment, industrial boilers are widely used in various fields of social production and people's lives. The energy consumed by industrial boilers in developed countries and emerging developing countries usually accounts for about 25% to 45% of the total energy consumption of each country, and the exhaust gas with high temperature is also the chief culprit of environmental pollution and greenhouse effect. [0003] For a long time, due to the relatively simple structure and relatively easy manufacture of industrial boilers, it is not uncommon for industrial boilers to be manufactured, installed and used without approval and not in accordance with safety and energy-saving technical s...

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Problems solved by technology

[0005] For traditional heating systems, although the boiler converts 60% to 90% of the heat of fuel combustion into useful heat energy (steam or hot water) for users, the high-temperature flue gas generated by combustion could have been used for power generation (work production) , is directly used to heat steam or hot water at a lower temperature, and the work capacity is greatly lost; in terms of refrigeration, in order to meet the peak electric load brought by air conditioning in summer, the power plant expands power production, and the large amount of excess waste heat generated cannot be used Utilization, resulting in a great waste of energy; separate absorption refrigeration, due to the distance from the heat source or the cold can not be transported for a long distance, so that the application is limited, even the gas-fired absorption refrigeration system also has a certain degree of boiler-like The loss of high-level heat used for low-temperature purposes. In addition, the energy utilization mode of pollution first and treatment later is the root cause of the difficulty in coordinating energy and the environment.

[0006] For the traditional combined cooling, heating and power system, there is no doubt that it has great vitality and broad development space, but there are also certain problems: gas turbine-absorption refrigeration, internal combustion engine-absorption refrigeration, Stirling machine-absorption refrigeration , Fuel cell-absorption refrigeration and other combined cooling, heating and power generation systems, when operating with steam Rankine combined cycle, it needs to be equipped with a first-level chemical desalination system, and the operating cost of chemical water treatment is very high, and it will generate a certain amount of water. Wastewater, waste acid, waste alkali pollution must be treated

[0007] Therefore, how to retain the advantages of the combined cooling, heating and power system, develop a combined cooling, heating and power system with wider fuel adaptability, truly solve the shortcomings of high-grade fuel and low-grade utilization of industrial boilers, break through the traditional thinking and realize environmentally friendly cooling and heating The trigeneration of electricity has become a difficult point in the research of this field

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