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Sorting system and method for fly ash non-porous floating beads

A sorting system and fly ash technology, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems affecting the quality of float beads, reduce the overall performance of float beads recycling, and save space. and water consumption, the effect of preventing agglomeration

Active Publication Date: 2022-07-29
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Floating beads are obtained through a series of complex physical and chemical reactions during the combustion process of coal-fired units in thermal power plants. "Porous floating beads", the density of this kind of porous floating beads is still less than 1g / cm3, so that when the existing technology relies on the density to realize the sorting of floating beads, the porous floating beads will follow the wall surface. The intact non-porous floating beads are sorted together, and the existence of porous floating beads will affect the quality of floating beads and reduce the overall performance of floating beads during recycling

Method used

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  • Sorting system and method for fly ash non-porous floating beads

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Effect test

Embodiment 1

[0047] like figure 1 As shown, a sorting system for fly ash non-porous floating beads includes:

[0048] A preprocessing unit, a coarse bead sorting unit and a non-porous floating bead sorting unit connected in sequence;

[0049] The pretreatment unit includes a decarburization unit connected to the outlet of the ash hopper 1 receiving the fly ash, and the outlet of the decarburization unit is connected to the inlet of the demagnetization unit for decarburizing and demagnetizing the fly ash;

[0050] The floating bead coarse sorting unit includes a floating bead roughing machine 23 connected to the outlet of the demagnetization unit. The mixture of porous beads and non-porous beads in coal ash is sent to the non-porous beads separation unit;

[0051] The non-porous floating bead sorting unit includes a heater 29 connected to the outlet of the floating bead rougher 23, and a floater 33 connected to the outlet of the heater 29; The gas is separated out and the water vapor ent...

Embodiment 2

[0078] Based on the sorting system of fly ash non-porous floating beads in the first embodiment, a sorting method for non-porous floating beads is realized, including the following steps:

[0079] 1. The fly ash in the ash hopper 1 enters the friction charging chamber 3 under the action of the ash hopper fan 2, so that the carbon particles and the ash particles have different polarities and electric quantities, and the charged fly ash enters the carbon particle collection chamber 4 , the carbon particles move to the positive electrode rod 6 under the action of the electric field, and enter the carbon particle collector 8 through the carbon particle channel 7 , and at this time, the ash particles enter the ash particle collector 11 through the ash particle channel 10 .

[0080] 2. The ash particles in the ash particle collector 11 enter the magnetic bead collection chamber 14 under the control of the ash particle collector valve 12 and the ash particle fan 13, and the magnetic f...

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Abstract

The separation system comprises a pretreatment unit, a floating bead coarse separation unit and a non-porous floating bead separation unit which are connected in sequence, and the pretreatment unit is used for decarburizing and demagnetizing fly ash; the floating bead coarse separation unit comprises a floating bead roughing machine connected with an outlet of the demagnetizing unit, and a mixture of porous floating beads and non-porous floating beads in the pretreated materials is separated out under the action of fans at the bottom and the side part of the floating bead roughing machine; the non-porous floating bead sorting unit comprises a heater connected with an outlet of the floating bead roughing machine and a floating and sinking device connected to the outlet of the heater, and the wall surface of the floating and sinking device is connected with a condensation pipe; water in the heater is heated to separate out gas in the porous floating beads and water vapor enters the porous floating beads at the same time, the floating and sinking device receives the heated mixture and is cooled to condense the water vapor in the porous floating beads to form negative pressure to suck the water in the floating and sinking device, the porous floating beads which sink after absorbing water are arranged at the bottom of the floating and sinking device, and the non-porous floating beads in a floating state are arranged at the top of the floating and sinking device.

Description

technical field [0001] The invention relates to the technical field of fly ash sorting, in particular to a sorting system and method for fly ash non-porous floating beads. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Fly ash is a solid waste produced by coal-fired thermal power plants when burning pulverized coal, which has a density of less than 1g / cm 3 The smooth spherical airtight hollow glass beads, also known as "floating beads", are filled with nitrogen, oxygen and carbon dioxide and other gases inside, with low specific gravity, smooth surface, high compressive strength, good fluidity, and good thermal stability. With high electrical resistance and good chemical inertness, it can be used in the manufacture of photocatalysts, adsorbents, lightweight composite materials, insulating materials, thermal insulation materials and concr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00B03B7/00B03B5/28B03C3/017B03C3/30B07B4/00B09B101/30
CPCB09B3/00B09B5/00B03B7/00B03B5/28B07B4/00B03C3/0175B03C3/30
Inventor 王志强张远军程星星许焕焕
Owner SHANDONG UNIV
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