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System for preparing activated charcoal with high specific surface area from fly ash by using flotation method
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A technology of fly ash and flotation method, which is applied in the removal of solid waste and other directions, can solve the problems of poor flotation effect and waste of energy consumption, and achieve the effect of saving energy and reducing environmental pollution.
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Problems solved by technology
[0008] The disadvantages of the above-mentioned technical solution are: usually swirling gas or laminar gas is used to push the air bubbles upward, the trajectory of the fly ash particles is spiral upward or straight upward, and the flotation effect is poor; no reflective surface is set, and the falling air bubbles and particles Directly enter the tail ash outlet, wasting energy
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Embodiment 1
[0056] In this embodiment, carbon particles (carbon powder raw materials) are obtained by flotation of fly ash particles. After drying and granulation, carbonization is carried out to it, and the carbon powder after carbonization is activated, which includes a flotation system, a carbonization system, Activation system (such as figure 1 shown).
[0057] figure 2 Shown is the flotation system of this embodiment, which includes a flotation device, the flotation device includes: a storage device 11, a distribution device 12, a vertically arranged cylinder 13, a cone-shaped reflective diffuser 14, Multi-layer flotation plate 15, air supply device 16, physical separation device such as ultrasonic separation device 18, filter plate 19, tail ash box 110, overflow collection section 1301, tail ash collection section 1305.
[0058] The cylinder body 13 arranged vertically can be divided into three parts, from top to bottom: the first flotation section 1302 , the diffusion cone secti...
Embodiment 2
[0084] Other parts of this embodiment are similar to Embodiment 1, except that the flotation system includes two flotation devices, that is, the second flotation device is arranged after the first flotation device. The second flotation device includes: a distribution device 12', a vertical cylinder 13', a cone-shaped reflective diffuser 14', a multi-layer flotation plate 15', an air supply device 16', a physical separation device such as Ultrasonic separation device 18', filter plate 19', overflow collection section 1301', tail ash collection section 1305'.
[0085] The cylinder body 13' arranged vertically can be divided into three parts, which are sequentially from top to bottom: the first flotation section 1302', the diffusion cone section 1303', and the second flotation section 1304'. Wherein, the first flotation section 1302' is relatively thin, and a layer of flotation plates 15' is arranged in it. The second flotation section 1304' is relatively thick, and an air diffu...
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Abstract
The invention discloses a system for preparing activated charcoal with a high specific surface area from fly ash by using a flotation method. The system comprises a flotation system and an activation system. The system has the advantages that: 1, because a gas dispersing device is arranged in each flotation device and the multiple gas holes of the gas dispersing device are obliquely upward in different angles respectively, and materials in a shell form turbulence so as to achieve better flotation effects; 2, the surface of each gas dispersing device also has a reflection effect by which not only can the effects of turbulence be enhanced but also bubbles and particles can be led to move upwards after rebounding, thus effectively improving the flotation rate; 3, by arranging a first recovery device, alkali vapor in an activation furnace is effectively recovered, thus avoiding the environmental pollution and potential safety hazard caused by direct discharge of the alkali vapor into atmosphere; and 4, by arranging a second recovery device, alkali particles obtained after cooling the alkali vapor are filtered and recovered, and simultaneously dust is prevented from being discharged into the atmosphere.
Description
technical field [0001] The invention relates to the production of activated carbon by using fly ash, and more specifically, the invention relates to a system for producing activated carbon from fly ash by adopting a flotation method. Background technique [0002] Fly ash is one of the largest industrial wastes in my country, and the annual slag discharge in China has reached 30 million tons at this stage. With the development of the power industry, the discharge of fly ash from coal-fired power plants is increasing year by year. Fly ash contains a large amount of unburned carbon particles, which can be used as a raw material for the manufacture of activated carbon after flotation. [0003] Chinese patent 200810031474.7 discloses a special flotation column for fly ash. A slurry distributor is installed on the top of the flotation column cylinder. Multi-layer bubbling plates are arranged inside the cylinder. The ash overflow hole, the pulp distribution pipe is installed arou...
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