Classification and comprehensive utilization method and system for brown coal

Classification and comprehensive utilization method and system for brown coal

  • CN 105,240,845 A
  • Filed: 11/16/2015
  • Published: 01/13/2016
  • Est. Priority Date: 11/16/2015
  • Status: Active Application
First Claim
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1. a brown coal hierarchical synthesis Application way, is characterized in that, comprises the steps:

  • (1) the rear feeding in fluid-bed combustion furnace of the brown coal gangue sub-elected is broken, screening is burnt;

    (2) flue gas that fluid-bed combustion furnace burning produces carries out rough dusting;

    (3) flue gas after dedusting enters boiler and steam is produced in water heat exchange;

    (4) flue gas after boiler heat exchange enters brown coal drying system and carries out drying to the brown coal sub-elected;

    (5) flue gas through brown coal drying system enters condenser system, sends in boiler after gained condensed water purified treatment as boiler feedwater, carries out desulphurization and denitration process from condenser system flue gas out;

    (6) after desulphurization and denitration, flue gas carries out dedusting again, obtains the flue gas that gas concentration lwevel is higher;

    (7) step (6) gained flue gas part is circulated to fluid-bed combustion furnace and oxygen mix, provides combustion adjuvant as coal gangue combustion, remaining flue gas then carries out trapping, sealing up for safekeeping, realizes the zero-emission of carbon dioxide.

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