Method for identifying separation or mixing state of binary particles in fluidized bed

A technology of particle separation and mixing state, applied in the field of multiphase flow, which can solve the problems of inaccurate identification and high identification cost

Pending Publication Date: 2020-10-27
ANHUI UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0005] Aiming at the problem of inaccurate identification of the separation / mixing state of binary particles in a fluidized bed and high identification costs in the prior art, the present invention provides a method for identifying the separation or mixing state of binary particles in a fluidized bed

Method used

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  • Method for identifying separation or mixing state of binary particles in fluidized bed
  • Method for identifying separation or mixing state of binary particles in fluidized bed
  • Method for identifying separation or mixing state of binary particles in fluidized bed

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Embodiment 1

[0073] In this implementation, the binary particles in the fluidized bed are dried sludge and hematite particles, and their particle characteristics are shown in Table 1 below:

[0074] Table 1 Material particle characteristics

[0075]

[0076] In recent years, the sludge output brought about by sewage treatment has gradually increased. Conventional direct incineration can realize the recycling and reduction of sludge, but it will produce dioxin, NO X Compared with the traditional direct incineration method, chemical loop combustion, as a new low-carbon combustion technology, can effectively reduce the generation of toxic and harmful gases, and at the same time make a solid waste utilization of sludge to effectively improve the environment. In this embodiment, dried sludge and hematite particles are used to react in a fluidized bed, which has a wide range of material sources and low cost. The method for identifying the state between the dried sludge and the hematite part...

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Abstract

The invention discloses a method for identifying the separation or mixing state of binary particles in a fluidized bed, belongs to the field of multiphase flow and is aiming at problems of inaccurateidentification of a mixing / separating state of binary particles in the fluidized bed and high identification cost in the prior art. The method for identifying the separating or mixing state of binaryparticles in the fluidized bed comprises the following steps of acquiring a pressure pulsation signal in the fluidized bed; S2, processing the pressure pulsation signal in the step S1 by adopting a Hilbert-Huang transform method to obtain an intrinsic mode function IMF; constructing a characteristic value; and S3, processing the IMF in the S2 by adopting a linear analysis method to obtain different frequency bands, solving the percentage of the sum of the characteristic values in each frequency band in the sum of the characteristic values in all the frequency bands, and further identifying thestate of the binary particles in the fluidized bed. The method is advantaged in that the binary particle separation and mixing state is identified by observing the time-frequency spectrum, the data processing amount is small, the analysis speed is high, identification of the binary particle mixing state in the fluidized bed is more accurate, the environmental interference factor is small, and identification cost is low.

Description

technical field [0001] The invention belongs to the field of multiphase flow, and more specifically relates to a method for identifying the separation or mixing state of binary particles in a fluidized bed. Background technique [0002] Multi-phase flow systems widely exist in nature and industrial production, and gas-solid fluidized bed is a typical two-phase flow system. It is used in related fields such as organosilicon synthesis, sewage treatment, desulfurization, etc. In the actual operation process, it is necessary to continuously add materials, and different types of particles have different movement characteristics in the fluidized bed. As the external conditions change, the flow law of the mixed particles in the fluidized bed will also change, and corresponding problems will occur. The separation and mixing of particles, the mixed fluidization of binary particles in the gas-solid fluidized bed is a complex nonlinear and unstable system, and the separation of binary...

Claims

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Application Information

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IPC IPC(8): G01N15/00G06K9/00
CPCG01N15/00G01N2015/0046G06F2218/08G06F2218/12
Inventor 段锋王健乔张丽徽赵云翔方冬东
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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