Biomass charcoal cultivated land heavy metal contaminated soil remediation conditioner preparation system

Abstract

The invention relates to the field of soil remediation, in particular to a biomass charcoal cultivated land heavy metal contaminated soil remediation conditioner preparation system. The preparation system comprises a feeding bin, a smashing and drying channel is arranged at the discharging end of the feeding bin, and a conveying device is arranged at the position, close to the lower portion, in the smashing and drying channel. The bottom end of the conveying device communicates with a hot air dryer. The discharge end of the conveying device is connected with a carbonization furnace, the end part of the carbonization furnace is connected with a tail gas purification device, and the end part of the tail gas purification device is connected with an induced draft fan. Crushing and drying are carried out, the particle size of raw materials before carbonization is ensured to meet the requirement, unqualified raw materials can be recycled through a cleaning window for secondary utilization, and the problem that crushing, sieving and drying are carried out separately in the general technology is solved; the tail gas purification device is arranged so that the tail gas treatment progress can be monitored in real time, the tail gas is convenient to discharge, and the problem of atmospheric pollution caused by random discharge of the tail gas of the carbonization furnace in the general biomass charcoal preparation process is solved.

Description

Technical field [0001] The present invention relates to the field of soil restoration. Specifically, a biomass carbon cultivated land heavy metal contamination soil repair subtraising preparation system. Background technique [0002] With the continuous development of industrial and agricultural production, such as mining and smelting and other activities and excessive application of pesticides, fertilizers, more and more heavy metal elements are brought into the soil environment, resulting in soil heavy metal pollution. Studies have shown that biomass carbon has a relatively developed microporous structure and a huge specific surface area, which is a green and efficient adsorbent. The surface-rich functional group and higher charge density can enhance the soil on heavy metal contaminants. Accurate capacity, thereby reducing soil heavy metal pollution. It can be made into a variety of biomass, and there are all kinds of straw, forestry and wood industrial residers, bamboo and bam...

AI Technical Summary

Problems solved by technology

[0003] In the preparation process of biochar, multiple process steps such as drying and carbonization of raw materials are required, and each step needs to transfer raw materials to different processing equipment, which makes the operation complicated and the production efficiency low

And in most of the existing preparation technologies, the gas generated by the pyrolysis of biomass in the carbonization furnace is directly discharged or discharged to the external environment after simple filtration. Only about 30% of the raw materials in the carbonization furnace carbonization process become biomass carbon, and about 30% of the raw material is H 2 O.CO 2 , CO, CH 4 、H 2 If these gases are directly discharged into the environment, they will cause air pollution and energy waste

[0004] To sum up, the problems existing in the prior art are mainly cumbersome preparation process, low carbon production efficiency, and unqualified carbonization furnace tail gas emission.

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