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System for improving drying capacity of bin and feeder coal pulverizing system when boiler changes coal types

A pulverizing system and middle-storage technology, which is applied in the direction of drying gas arrangement, drying, drying machine, etc., to achieve the effect of improving quality, low operation and maintenance cost, and improving drying output.

Active Publication Date: 2013-06-12
HEILONGJIANG ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem of boiler operation safety and economical efficiency in the coal-type change of the boiler adopting the medium-storage pulverizing system in thermal power generation enterprises, especially in the combustion process of blending lignite, and provides a method for improving boiler changeover. Drying output system of intermediate storage pulverizing system according to coal type

Method used

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  • System for improving drying capacity of bin and feeder coal pulverizing system when boiler changes coal types
  • System for improving drying capacity of bin and feeder coal pulverizing system when boiler changes coal types

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specific Embodiment approach 1

[0015] Specific implementation mode 1: This implementation mode is a system for improving the drying output of the intermediate storage pulverizing system when the boiler changes coal types. Air preheater 4, primary air preheater 5, blower 6, first mixed air isolation door 7, second mixed air isolation door 8, first hot air isolation door 9, second hot air isolation door 10, hot air duct 11, first A warm air isolation door 12, a second warm air isolation door 13, a warm air duct 14, a first cold air isolation door 15, a second cold air isolation door 16, a cold air duct 17, a powder bin 24, an air powder mixer 25 and a furnace 26 Composition; wherein, the furnace 26 communicates with the smoke side inlet 4-1 of the secondary air preheater 4, the hot blast outlet 4-2 of the secondary air preheater 4 communicates with the air inlet of the hot blast duct 11, and the inlet air duct 4 of the secondary air preheater 4 -3 communicates with the air outlet 5-1 of the primary air prehea...

specific Embodiment approach 2

[0018] Embodiment 2: This embodiment differs from Embodiment 1 in that: the material of the flue gas pipeline 23 is a low-alloy heat-resistant steel pipe. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0019] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that: the pipe diameter of the flue gas pipeline 23 is 950mm-1000mm. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a system for improving the drying capacity of a bin and feeder coal pulverizing system when a boiler changes coal types and relates to a system for improving the drying capacity of a coal pulverizing system. The invention aims at solving the problem that boilers adopting the bin and feeder coal pulverizing system change the coal types in thermal power enterprises, in particular to the problems of safety and economy of boiler operation in the lignite-bleeding burning process. A high-temperature coal economizer manhole is communicated with a first warm air isolating door air inlet and a second warm air isolating door air outlet by a flue gas pipeline of the system; and a flue gas isolating door and a flue gas adjusting door are sequentially arranged on the flue gas pipeline according to the flowing direction of mediums. The system disclosed by the invention has the advantages of low reforming cost, low operation and maintenance cost, reliability in operation and capability of operating for a long time. The system is used for reforming the coal pulverizing system when the boiler adopting the bin and feeder coal pulverizing system changes the coal types.

Description

technical field [0001] The invention relates to a system for improving the drying output of a pulverizing system. Background technique [0002] The pulverizing system is an important auxiliary system of the coal-fired boiler, which directly affects the safe and stable operation of the boiler. When coal-fired boilers are blended with non-design coal types, the drying treatment of the pulverizing system and the operation safety of the pulverizing system are the main restrictive factors. At present, the design coal type of boilers for thermal power generating units in my country is mostly bituminous coal. However, in recent years, with the change of the coal market, more and more enterprises cannot obtain enough design coal types. It has become an inevitable trend for coal-fired boilers to blend non-design coals, especially in eastern Mongolia and northeast my country where lignite reserves are abundant, and lignite blending is more common in thermal power generation enterpris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23K1/00F26B21/14
Inventor 束继伟刘珊伯孟繁兵金宏达杜利梅高松
Owner HEILONGJIANG ELECTRIC POWER RES INST
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