Method and system for removing coal-fired boiler pollutants by utilizing solar energy

Abstract

The invention relates to a method and system for removing coal-fired boiler pollutants by utilizing solar energy. The method is characterized in that a solar heat collection device is introduced into a denitrification and ammonia decarbonization regeneration device of a coal power generation system, a first evaporator and a first heat exchanging pipe both of which the heat source is sourced from the solar heat collection device as well as a second evaporator and a second heat exchanging pipe both of which the heat source is sourced from the steam bleeding of a steam turbine are arranged in the denitrification and ammonia decarbonization regeneration device, and a working medium heated by the solar heat collection device exchanges the heat with the first evaporator and a pyrolysis regeneration tower so as to supply the heat source to the vaporization of a denitrification catalytic reducing agent and the regeneration of an absorbing agent for the ammonia decarbonization and to substitute all or partial heat generated during the steam bleeding on the steam turbine side and released in the evaporator and the pyrolysis regeneration tower. The invention also provides a system for implementing the method. By utilizing advantages such as abundance and no pollution, of the solar energy, the energy utilization structure is adjusted, under the situation that the unit generating capacity is maintained constant, the coal consumption is remarkably reduced, and the benefit of a power plant is increased while the emission of the nitrogen oxides of the coal power plant is effectively reduced.

Description

technical field [0001] The invention relates to a technology for removing coal-fired pollutants, in particular to a method and system for removing pollutants from coal-fired boilers using solar energy. Background technique [0002] Coal is the main energy source in the world today. Facing the pressure of current resource shortage and environmental constraints, improving energy conversion efficiency, optimizing energy structure and vigorously developing renewable energy are important guarantees for sustainable development. When electricity, coal, oil and other non-renewable energy resources are frequently running out, and energy issues have increasingly become a bottleneck restricting the development of the international society and economy, more and more countries have begun to develop solar energy resources and seek new driving forces for economic development. [0003] The emission of pollutants NOx and greenhouse gas CO2 from coal-fired power boilers has increasingly serio...

AI Technical Summary

Problems solved by technology

In the prior art, when the coal-fired power boiler removes nitrogen oxides and carbon dioxide, it needs to use electric heating or extract steam from a certain stage of the steam turbine to heat the reducing agent in the ammonia evaporator, which consumes a lot of energy for the unit , which increases the coal consumption of the unit, which reduces the benefit of the power plant

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