Combined cooling, heating and power device of distributed type industrial boiler

Abstract

The invention relates to a combined cooling, heating and power device of a distributed type industrial boiler. A steam Rankine cycle system positive pressure and closed type method is adopted, a condenser of an outlet steam exhaust of a steam turbine serves as heat sources for a heating plant and an absorption refrigeration device, and therefore gradient utilization of energy sources is achieved. High quality energy of fuel is recovered for generating electricity, more than 260 KWh electric quantity can be recovered from per ton evaporation capacity (or 0.7MW heating load), at the same time, cooling and heating combination is achieved, and exhaust gas waste heat can be effectively recovered. According to a steam Rankine cycle system, waste acid and waste alkali are not produced, and the problems of oxygen corrosion and scale formation of the boiler are effectively avoided. Therefore the distributed type industrial boiler is energy-saving, environment-friendly and very remarkable in social benefits.

Description

technical field [0001] The invention relates to a distributed industrial boiler combined cooling, heating and power supply device, and specifically belongs 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 specifications...

AI Technical Summary

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, all need to use oil and gas fuels, which are different from China's coal-based energy structure. Adaptation; steam turbine-absorption combined cooling, heating and power supply system can use coal as fuel, but 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 produce certain pollution, which 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, and truly solve the problem of high-grade fuel in industrial boilers and low The shortcomings of grade utilization, breaking through the traditional thinking and realizing the triple production of cooling, heating and power in industrial boilers have become the difficulties of research in this field

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