Low NOx discharge smoke waste heat heating system

Abstract

The invention discloses a low NOx discharge smoke waste heat heating system. The low NOx discharge smoke waste heat heating system is characterized in that a gas inlet pipeline is connected with a gas inlet of a generator of a heat pump; a gas outlet of the generator of a heat pump communicates with a smoke evacuation pipeline of a gas boiler through a smoke pipeline; the smoke evacuation pipeline is connected with a gas inlet of a denitration apparatus; a gas outlet of the denitration apparatus is connected with a gas inlet of a smoke-water heat transfer device through a pipeline; a gas outlet of the smoke-water heat transfer device communicates with the outside through an exhaust gas pipeline; a water outlet of the smoke-water heat transfer device is connected with a water inlet of an evaporator of the heat pump through a first circulating water pipe; and a water outlet of the evaporator of the heat pump is connected with a water inlet of the smoke-water heat transfer device through a second circulating water pipe to enable a heating pipeline to flow through the inside of the heat pump. The low NOx discharge smoke waste heat heating system can effectively reduce the content of NOx in the discharged smoke so as to achieve the newest discharge standard demand for key city atmospheric pollution abatement, and is higher in the utilization rate of heat energy, compared with the prior art, at the same time.

Description

technical field [0001] The invention relates to a flue gas residual heat heating system with low NOx emission, belonging to the field of energy-saving and environment-friendly equipment. Background technique [0002] In recent years, the central and eastern regions of my country have been caught in severe smog and polluted weather. In September 2013, the State Council issued the "Action Plan for Air Pollution Control" as an action guide for the current and future national air pollution prevention and control work. The "Action Plan" proposes to highlight the governance of heavily polluted cities, strengthen the reduction and control of various pollution sources, highlight the adjustment of energy structure, complete the task of reducing coal in stages, vigorously implement clean energy substitution, and highlight pollution control during the winter heating period. For this reason, many central cities implement a coal-to-gas project in which coal-fired boilers are replaced wi...

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Problems solved by technology

[0003] The present invention proposes a flue gas waste heat heating system with low NOx emission, which solves the problems of low heat energy utilization rate and high NOx content in exhaust smoke in the prior art

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