| Activating lignite and sludge by electro-hydraulic impulse |
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| 作者姓名： | 陈德淑 |
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| 作者单位： | CHEN Deshu，LIAO Zhenfang，DENG Xiaogang，ZHAO Jianxin，KANG Yongfeng College of Mechanical Engineering，Chongqing University，Chongqing，400044，P.R. China Received 22 May 2003; revised 26 November 2003 |
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| 基金项目： | the National Natural Science Foundation of China (59979029) |
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| 摘 要： | 1. Introduction At present, it is necessary to use fertilizer to ensure the stable and high agricultural productivity. However, as we all know, the fertilizer not only decreases the self-fertility of soil, but also is accompanied with pesticide. Food poisoning caused by remnant pesticide in fruits and vegetables is often reported, and in such cases, chronic poisoning is the majority. The remnant pesticide accumulates in body gradually, and then induces kinds of disease. As reported, the Miyu…
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Activating lignite and sludge by electro-hydraulic impulse |
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| CHEN Deshu,LIAO Zhenfang,DENG Xiaogang,ZHAO Jianxin,KANG Yongfeng College of Mechanical Engineering,Chongqing University,Chongqing,P.R. China Received May,revised November.Activating lignite and sludge by electro-hydraulic impulse[J].Journal of Chongqing University,2003,2(2). |
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| Authors: | CHEN Deshu LIAO Zhenfang DENG Xiaogang ZHAO Jianxin KANG Yongfeng College of Mechanical Engineering Chongqing University Chongqing PR China Received May revised November |
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| Institution: | College of Mechanical Engineering, Chongqing University, Chongqing, 400044, P.R.China |
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| Abstract: | A device to activate lignite and sludge by electro-hydraulic impulse is presented. It comprises an impulse current generator constituted by a high voltage transformer, a high voltage silicon rectifier, a current-limiting resistor, a capacitor bank and an air-break switch, and a lignite and sludge appliance made up of two plane electrodes and a working chamber. The installation activates the lignite or sludge delivered to the working chamber by the impulse current that is from the generator to puncture the main gap in the working chamber, raise the temperature therein up to (20 000 to 40 000) K and the energy density to as high as 109 Jm-3, and form a plasma piston. The alternative development and attenuation of plasma expansion makes the lignite in a number of physical and chemical processes resulting in diverse active radicals and ions, and also breaks it into grains mostly smaller than 250 mm. It is founded by experimental study that the technology can raise the content of nitro-nitrogen by 1.4 to 1.5 times and that of dissoluble organic substances by 5 to 10 times which is probably attributed to the decomposition of the ample germs in the lignite. The calculated power requirement to activate lignite is about (50 to 60) kWht-1. In comparison with muck applied to cucumber cultivation, the activated lignite demonstrates its features as an effective and economical green fertilizer by the same yield with half amount. These findings imply a promising access to green fertilizer. |
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| Keywords: | lignite plasma Electro-hydraulic impulse sludge |
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