Device and method for recycling gasified and burned alkali for straw pulp papermaking black liquor circulating fluidized bed

A circulating fluidized bed, papermaking black liquor technology, applied in the direction of regeneration of alkali liquor, can solve the problems of increasing operating costs, difficulty of straw pulp papermaking black liquor, etc. The effect of running costs

Active Publication Date: 2013-01-09
哈尔滨工大华实环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of using the existing technology to recycle and process straw pulp papermaking black liquor, and the recovery process needs to add auxiliary fuel to increase the operating cost, and then provide a straw pulp papermaking black liquor circulating fluidized bed gasification , Combustion soda recovery treatment device and method

Method used

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  • Device and method for recycling gasified and burned alkali for straw pulp papermaking black liquor circulating fluidized bed

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Experimental program
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specific Embodiment approach 1

[0021] Specific implementation mode one: combine figure 1 Describe this embodiment, the straw pulp papermaking black liquor circulating fluidized bed gasification of this embodiment, combustion alkali recovery treatment device includes multi-effect evaporator 1, disk evaporator 2, concentrated black liquor tank 3, pump 4, spray gun 5 , gasification chamber 6, return valve 7, waste heat boiler 10, air preheater 11, bag filter 13, induced draft fan 14, first cone valve 19, heat exchange chamber 20, dissolution tank 22, causticizer 23 , chain plate slag removal machine 24, dryer 25, secondary fan 28, second gas-solid separator 30, tar condensation tower 31, spray dehydration tower 32, sewage treatment plant 33, water ring compressor 34, gas storage tank 35. Second cone valve 36, circulating ash distribution chamber 38 and circulating fluidized bed, said circulating fluidized bed includes furnace 8, first gas-solid separator 9, air chamber 17, air distribution plate 18, burner 16 ...

specific Embodiment approach 2

[0027] Specific implementation mode two: combination figure 1 This embodiment will be described. The gasification chamber 6 in this embodiment is a bubbling bed. With such setting, the operation is stable and meets the actual needs. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Specific implementation mode three: combination figure 1 Describe this embodiment, the hearth 8 that is positioned at the upper part of secondary air inlet 21 of this embodiment is provided with dense black liquor inlet 39, and the liquid outlet of thick black liquor tank 3 communicates with thick black liquor inlet 39. Such setting can effectively provide the heat required by the furnace of the circulating fluidized bed according to actual needs, and realize energy self-sufficiency in the device without adding other auxiliary fuels. In this embodiment, the liquid outlet of the concentrated black liquor tank 3 communicates with the concentrated black liquor inlet 39 through a valve. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a device and a method for recycling gasified and burned alkali for a straw pulp papermaking black liquor circulating fluidized bed and relates to the device and the method for recycling the alkali of papermaking black liquor. The device and the method are used for solving the problems that the prior art is difficult to be used for recycling the straw pulp papermaking black liquor, the auxiliary fuels are added to a recycling process and the running cost is increased. The device comprises a multi-effect evaporator, a disc evaporator, a thick black liquor tank, a pump, a spraying gun, a gasifying chamber, a feedback valve, a waste heat boiler, an air pre-heater, a bag-type dust collector, a draught fan, a cone valve, a heat exchange chamber, a dissolving tank, a causticizer, a chain plate type slag conveyor, a drier, a secondary air fan, a second gas-solid separator, a tar condensing tower, a spraying dehydrating tower, a sewage treatment plant, a water annular compressor, an air storage tank, a circulating ash distributing chamber and a circulating fluidized bed, wherein the dissolving tank is respectively communicated with the causticizer and the chain plate type slag conveyor and the chain plate type slag conveyor is communicated with the drier. The device provided by the invention is used for recycling the alkali of the straw pulp papermaking black liquor.

Description

technical field [0001] The invention relates to an alkali recovery treatment device and method for papermaking black liquor, in particular to a circulating fluidized bed gasification and combustion alkali recovery treatment device and method for straw pulp papermaking black liquor. Background technique [0002] In recent years, the paper industry has become one of the industries with large investment, high energy consumption and serious environmental pollution. Alkali recovery technology is currently the most effective method for treating wood pulp and papermaking black liquor. Alkali recovery method can greatly reduce the high-load pollution of black liquor, and can also recover heat energy and chemicals. my country has very rich reserves of straw papermaking raw materials. Grass fiber raw materials are the main traditional papermaking raw materials in my country. Straw pulp papermaking black liquor has a high silicon content, which is prone to silicon plugging, and silicon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C11/04
Inventor 别如山宋兴飞纪晓瑜陈佩朱少飞黄兵刘茜茜
Owner 哈尔滨工大华实环保科技有限公司
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