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A method and device for collecting char in coal-fired boiler flue gas fly ash

A technology of flue gas and equipment, applied in the field of comprehensive utilization of solid waste, to achieve the effect of improving dust removal efficiency, reducing emissions, and improving resource utilization and value

Active Publication Date: 2015-11-18
CEEC JIANGSU ELECTRIC POWER DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects existing in the existing techniques and methods for collecting charcoal from fly ash, the present invention provides a method and device for directly collecting charcoal from boiler dusty flue gas to achieve the purpose of solving the above-mentioned shortcomings of the prior art

Method used

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  • A method and device for collecting char in coal-fired boiler flue gas fly ash
  • A method and device for collecting char in coal-fired boiler flue gas fly ash
  • A method and device for collecting char in coal-fired boiler flue gas fly ash

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no. 1 example

[0029] figure 2 It is a structural schematic diagram of the charcoal selection equipment in the first embodiment of the present invention. This embodiment is a three-pole collection and two-pole separation carbon selection equipment. As shown in the figure, the carbon selection device includes: corona electrode 1, collector electrode 2, collector electrode 3, charged positive electrode 4, charged negative electrode 5, ash collecting hopper 6, and charcoal collecting hopper 7. Among them, the corona electrode 1, the collector electrode 2 and the collector electrode 3 form the particle collection section, and each charged positive electrode 4 and charged negative electrode 5 form the carbon selection section. The collection pole 2 is an optional item. If the collection pole 2 is removed, the equipment will become a two-pole collection and two-pole separation carbon selection equipment. The number of each component is arranged in the horizontal and vertical directions of the f...

no. 2 example

[0033] image 3 It is a schematic structural diagram of the charcoal selection equipment in the second embodiment of the present invention. This embodiment is a quadrupole carbon separator. Please refer to image 3 As shown, the carbon selection device includes a corona electrode 1, a collecting electrode 2, a carbon collecting electrode 3, a collecting electrode 4, an ash collecting hopper 5, and a carbon collecting hopper 6. Several.

[0034] When the dust-containing and carbon-containing flue gas flow passes through, the negative ions and electrons generated by the corona electrode 1 make the carbon particles and ash particles in the flue gas flow negatively charged, and are attracted to the collector electrode 4 with the opposite polarity to conduct electricity. After the carbon particles with good properties come into contact with the collector 4, they quickly release the negative charge, and at the same time, the positive charge is obtained from the collector 4 to bec...

no. 3 example

[0036] Figure 4 It is a structural schematic diagram of the charcoal selection equipment in the third embodiment of the present invention. This embodiment is a four-pole collection and two-pole separation carbon selection device. Please refer to Figure 4As shown, the carbon selection device includes: corona electrode 1, collector electrode 2, carbon collector electrode 3, collector electrode 4, charged positive electrode 5, charged negative electrode 6, ash collecting bucket 7, carbon collecting bucket 8, etc.; Pole 1, collecting pole 2, carbon collecting pole 3, and collecting pole 4 belong to the particle collection section, and each charged positive electrode 5 and charged negative electrode 6 belong to the carbon selection section. Several. The device can further improve the carbon selection efficiency on the basis of the four-pole carbon selection device.

[0037] When the dust-containing and carbon-containing flue gas flow passes through, the negative ions and elec...

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Abstract

The invention provides a method for collecting carbon from flying ash of flue gas of a coal-fired boiler. The method is characterized by comprising the following steps: 1. powering negative electricity on carbon granules and ash granules in flue gas flows by using a corona electrode; 2. depositing the carbon granules and the ash granules by using a collecting electrode; 3. absorbing away the carbon granules by using a static electric field after the carbon granules and the ash granules come into contact with the electrodes, thereby separating the carbon granules and the ash granules. The invention further provides carbon selecting equipment for performing the method. According to the method and the equipment, based on the electrical conductivity differences among the carbon granules and the ash granules, the carbon granules are separated from the flue gas flows in the boiler. Therefore, a great quantity of the valuable carbon can be recycled, a plurality of energy sources are saved, and the recycling degree and the value of pulverized coal ash are improved. In addition, the utilization rate of the pulverized coal ash is improved, the dust removal efficiency of the boiler is improved, and the dust emission into the atmosphere is reduced.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of solid waste, and more specifically relates to a method and equipment for collecting charcoal in flue gas fly ash of a coal-fired boiler. Background technique [0002] Coal-fired boiler fly ash (fly ash) is an industrial solid waste. Due to the influence of boiler operating conditions and coal types, coal combustion is often insufficient, resulting in unburned carbon in the fly ash, resulting in a large waste of resources. . [0003] Collecting charcoal from fly ash, the existing collection process and method is to collect the fly ash in the dusty flue gas by the boiler dust collector first, then transport and store it, and then use certain processes and methods to extract the ash from the stored ash. Get charcoal from. These methods have disadvantages such as high energy consumption, complicated system process, serious wear, and influence on the activity and comprehensive utilization ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03C3/04
Inventor 范仁东高嘉梁王志斌陈杰
Owner CEEC JIANGSU ELECTRIC POWER DESIGN INST CO LTD