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Energy-conserving and environment-protecting regenerated lead smelting and paper pulp cogeneration technology

A technology of recycled lead smelting, energy saving and environmental protection, applied in cross fields, can solve the problems of polluted pulp, inevitable lead in sedimentation tank effluent, lack of automatic sorting of dismantling materials, etc. The effect of reducing the cost of carbonization desulfurization

Active Publication Date: 2015-04-08
HEFEI UNIV OF TECH
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AI Technical Summary

Problems solved by technology

The second-generation technology basically realizes the mechanization of dismantling and improves labor hygiene conditions, but the dismantling materials lack automatic sorting and rely on manual assistance
The disadvantage of this step is that the effluent from the sedimentation tank will inevitably contain lead, and it will pollute the pulp if it is directly used for papermaking

Method used

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  • Energy-conserving and environment-protecting regenerated lead smelting and paper pulp cogeneration technology

Examples

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Embodiment Construction

[0054] Below in conjunction with accompanying drawing 1, non-limiting embodiment is described as follows:

[0055] (1) Squeeze and shorten the straw to obtain straw particles less than 50mm, use industrial caustic soda as raw material to prepare a caustic soda solution with a mass concentration of 4% for the initial production; mix the prepared straw particles and caustic soda solution in a ratio of 1:4 ratio into the pulping and cooking reaction tank;

[0056] Use the low-pressure steam produced by the low-pressure waste heat boiler for lead smelting as the heat source to cook the straw particles with caustic soda solution at 120°C for 60 minutes;

[0057]centrifuging the slurry obtained after the completion of the cooking process, and centrifuging and drying the obtained solid with clear water accounting for 50% of the volume of the slurry to obtain pulp, which is sold after drying;

[0058] The centrifuged liquid is combined with the centrifugal washing liquid, which is th...

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Abstract

The invention discloses an energy-conserving and environment-protecting regenerated lead smelting and paper pulp cogeneration technology. The energy-conserving and environment-protecting regenerated lead smelting and paper pulp cogeneration technology is characterized by comprising the following steps: recovering flue gas waste heat of a crude lead smelting furnace as a heat source for producing paper pulp; washing a lead smelting flue gas with a strong alkaline paper-making black liquor, and absorbing CO2 and a trace of SO2 in the flue gas, thus obtaining a sodium carbonate solution, carbonizing a lead plaster; neutralizing and disassembling a waste acid generated by a waste battery by using the paper-making black liquor; washing the flue gas with the black liquor, neutralizing the waste sulfur acid, and then merging the obtained sodium sulphate solution; and causticizing with lime, returning the obtained NaOH solution to a paper-making section. According to the technology disclosed by the invention, lead smelting and closed cycle of pulp production wastewater and the flue gas are achieved; the flue gas waste heat of the regenerated lead smelting furnace is utilized; the alkalinity of paper-making pulping and an acid waste liquid of the regenerated lead are mutually neutralized; and the technical problem of waste liquid treatment of the regenerated lead smelting industry and the paper-making production industry is solved by using waste to treat waste.

Description

1. Technical field [0001] The invention relates to the intersecting fields of waste lead-acid battery lead regeneration smelting, papermaking, energy saving and consumption reduction, environmental pollution control and the like. 2. Background technology [0002] Lead-acid batteries are widely used, mainly including automobile starting batteries, communication batteries, electric bicycle power batteries, mining and other lighting batteries. In 2013, the output of lead-acid batteries in my country reached 205 million kVAh, a year-on-year increase of 15.4%. The output of lead-acid batteries ranks first in the world. In 2013, the sales revenue of lead-acid batteries in my country reached 117.7 billion yuan, far higher than the annual sales of 59 billion yuan for lithium-ion batteries, and it is still the leader in the battery industry. The annual gross industrial output value of the entire lead-acid battery industry has exceeded 100 million yuan. [0003] According to statis...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B13/00D21C11/00B01D53/78B01D53/62B01D53/60B01D47/06
CPCY02P40/40Y02P70/10
Inventor 陈天虎刘海波谢巧勤朱承驻
Owner HEFEI UNIV OF TECH
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