The invention discloses a
flue gas spraying, purifying and heat recovering
system for a
coal burning boiler and belongs to the field of
flue gas treatment or
waste gas device configuration. The
flue gas spraying, purifying and heat recovering
system comprises a
control system and the like; a separation board by which an inner cavity of a
soot settling chamber is divided into two return flues is arranged in the inner cavity of the
soot settling chamber; a
smoke exhaust channel is communicated with the return flues; a
waste heat receiving device and a dust remover are connected onto the
smoke exhaust channel; a
soot filter screen is arranged at the right part of a right cavity of a labyrinth type soot
settling chamber; the right end of the soot
settling chamber is communicated with a spraying chamber; the right end of the spraying chamber is communicated with a labyrinth type extended
cooling channel; the labyrinth type extended
cooling channel is communicated with a
chimney; temperature controllers connected with the
control system are respectively arranged in the soot
settling chamber and an inner cavity of the labyrinth type extended
cooling channel; the spraying chamber is connected with a
water treatment system through a plurality of recovering water pipes; a plurality of water inlet pipes extend into the inner cavity of the spraying chamber; and spraying nozzles are arranged on the water inlet pipes. The
flue gas spraying, purifying and heat recovering system disclosed by the invention is simple and convenient to manage; and according to the
flue gas spraying, purifying and heat recovering system, emission heat of the
coal burning boiler can be safely and reliably absorbed;
thermal pollution,
pollution from dust in the soot,
pollution from
sulfide,
nitride and the like are reduced and
flue gas is enabled to achieve non-hazardous emission.