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Process and device for preparing fumed silica and activated carbon at low temperature with rice hull ash as raw material

A technology of fumed white carbon black and rice husk ash, which is applied in the direction of hydrogen chloride preparation, silicon dioxide, hydrogen fluoride, etc., to achieve large-scale industrial production, save environmental protection, treat waste water, and save costs

Active Publication Date: 2016-12-14
HUANGGANG NORMAL UNIV +1
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Problems solved by technology

After consulting relevant information and Chinese patent documents, no relevant reports were found on the use of other raw materials to produce fumed silica

Method used

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  • Process and device for preparing fumed silica and activated carbon at low temperature with rice hull ash as raw material
  • Process and device for preparing fumed silica and activated carbon at low temperature with rice hull ash as raw material
  • Process and device for preparing fumed silica and activated carbon at low temperature with rice hull ash as raw material

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited to the following embodiments.

[0029] The structure of the preparation device provided in this example is as follows: figure 1 As shown, the device includes a hot air feeding system, a chemical reaction system, a cooling system and an exhaust gas absorption system, wherein the hot air feeding system is used to store compressed air and send it into the chemical reaction system after heating the air. The hot air feeding system comprises an air compressor 12, an air storage tank 13, an air heater 14 and pipelines, the air compressor 12, the air storage tank 13 and the air heater 14 are connected by pipelines, and the pipelines are also provided with valves and meter.

[0030] The chemical reaction system is composed of an acid liquid storage tank 1, a feed bin 2 and a reactor 3, th...

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Abstract

The invention provides a process for preparing fumed silica and activated carbon at low temperature with rice hull ash as a raw material. In the process, rice hull ash and other kinds of waste are used as the raw material and react with fluorine-containing acid liquor, hydrochloric acid and nitric acid to prepare high-value-added products fumed silica and activated carbon, the content of SiO2 in the prepared products is larger than 99.9%, the specific area measured through a multi-point BET method is 350-500 m<2> / g, and the effect of turning waste into wealth is achieved. Acidic gas generated in the preparation process is absorbed through a negative pressure water absorbing tank to prepare corresponding acidic liquid, and when concentrated to certain concentration, the acidic liquid can be used circularly. The invention further provides a production device used in the process, parts used in the production device are common tools used in a chemical plant and low in cost, and large-scale industrial production can be achieved.

Description

technical field [0001] The invention relates to a process method and a device for preparing gas-phase white carbon black and activated carbon at low temperature by using rice husk ash, which is waste from a biomass power plant, and belongs to the technical field of chemical purification and environmental protection. Background technique [0002] Biomass power generation is a new type of environmentally friendly power generation technology. On the one hand, it makes scientific, reasonable and effective use of rice husks that have been long-term waste in our agricultural industry; Emissions of sulfur dioxide and sulfur trioxide gases into the atmosphere. Like a coal-fired power plant, its burning over the years will produce a large amount of ash. According to the data provided by the relevant biomass power plant, there will be about 1.5-2.0 tons of rice husk ash for every 20 tons of rice husk burned. If these If the ash cannot be effectively treated and utilized, the biomass ...

Claims

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Application Information

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IPC IPC(8): C01B33/18C01B31/08C01B7/19C01B7/01C01B21/40
CPCC01B7/012C01B7/193C01B21/40C01B33/18C01P2006/12C01P2006/80
Inventor 田辉明杨水彬田正芳叶发兵
Owner HUANGGANG NORMAL UNIV
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