Graded pyrolysis gasifying system and application thereof, and treatment method of leather-producing wastes

Abstract

The invention discloses a graded pyrolysis gasifying system and application thereof, and a treatment method of leather-producing wastes. The system comprises a first rotary kiln and a second rotary kiln, wherein the first rotary kiln comprises a leather crushing feeding opening, a high-temperature smoke inlet, a medium-temperature smoke outlet, a first rough gas outlet and a second byproduct discharging opening; the second rotary kiln comprises a leather sludge feeding opening, a medium-temperature smoke outlet, a first rough gas outlet and a sludge slag discharging opening; the medium-temperature smoke outlet of the first rotary kiln is communicated with the medium-temperature smoke inlet of the second rotary kiln; the high-temperature smoke inlet is communicated with a secondary combustion chamber; the first rough gas outlet and / or the second rough gas outlet is communicated with the secondary combustion chamber. The treatment method of the leather-producing wastes is clean and efficient; the leather-producing wastes can be reduced by 90% or more.

Description

technical field

[0001] The invention relates to a hierarchical pyrolysis gasification system and its application, and a treatment method for tanning waste. Background technique

[0002] In recent years, with the rapid economic and social development, China has established itself as a major leather producer, trader and consumer in the world, and the output of major products ranks among the top in the world; among them, the output of leather is 720 million square meters, About 1 / 5 of the world's total. More than 50% of the products in China's leather industry are exported, and the export value of leather products accounts for 4% of the country's total exports. The average annual foreign exchange earnings from exports reach more than 40 billion US dollars, making it a major domestic exporter. Behind the rapid development and prosperity of the tanning industry, due to the industrial form and processing methods, the environmental pollution has been aggravated, and many tanning g...

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