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

A technology for pyrolysis, gasification and waste, which is used in the removal of solid waste, the manufacture of combustible gas, and the petroleum industry. and environmental benefits, the effect of solving chromium pollution

Active Publication Date: 2015-06-10
EAST CHINA UNIV OF SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing pyrolysis and gasification methods for treating tanning wastes, which are small in scale, low in efficiency, and unfavorable for the rational utilization of multiple products, and provide a A hierarchical pyrolysis gasification system and its application, and a treatment method for tanning waste

Method used

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

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The hierarchical pyrolysis gasification system provided in this embodiment is as follows: figure 1 shown. The graded pyrolysis gasification system includes a first rotary kiln 1 and a second rotary kiln 2, the first rotary kiln 1 includes a leather scrap feed port 101, a high-temperature flue gas inlet 102, a medium-temperature flue gas Gas outlet 103, a first crude gas outlet 104 and a by-product outlet 105, the second rotary kiln 2 includes a leather sludge inlet 201, a medium-temperature flue gas inlet 202, and a low-temperature flue gas outlet 203 , a second crude gas outlet 204 and a sludge ash outlet 205, the medium temperature flue gas outlet 103 of the first rotary kiln 1 and the medium temperature flue gas inlet 202 of the second rotary kiln 2 connected.

[0034] Wherein, the structure of the first rotary kiln 1 and the second rotary kiln 2 is the same.

[0035] The high-temperature flue gas inlet 102 is also in communication with the first and second combus...

Embodiment 2

[0043] The structure of the hierarchical pyrolysis gasification system of this embodiment is the same as that of Embodiment 1. The specific treatment method of tannery waste is as follows: Take the graded pyrolysis gasification system with a daily processing scale of 100 tons of tannery waste as an example, wherein leather sludge is about 80 tons / day (water content is about 80%), leather scraps About 20 tons / day (about 50% water content) its composition is shown in Table 1, calorific value is shown in Table 2. Meaning of symbols: moisture (M), ash (A), volatile matter (V) and fixed carbon (FC). Meanings of subscript symbols: received basis (ar): the state of the sample is the state in which the batch of samples was received; dry basis (d): the state in which the sample is in the state of no moisture.

[0044] Table 1 Composition analysis

[0045]

[0046] Table 2 calorific value analysis (dry basis)

[0047] substance

leather scraps

leather sludge

...

Embodiment 3～10

[0052] Embodiment 3~10 is except that the reaction condition of rotary kiln is different with embodiment 2 (specifically see table 3), all the other equipment parameters and conditions are all the same with embodiment 2, and final test effect is also similar with embodiment 2, for making The treatment effect of leather waste is very good.

[0053] The reaction conditions of table 3 embodiment 3~10

[0054]

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/00C10J3/72C10J3/84B09B3/00
Inventor 赵辉李伟锋刘海峰张涛于华龚欣王辅臣于广锁王亦飞许建良李伟东梁钦锋周志杰代正华陈雪莉郭晓镭王兴军郭庆华刘霞陆海峰李超龚岩王立
Owner EAST CHINA UNIV OF SCI & TECH
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