Methods, systems for dehydrating gasification fine slags, and media thereof

Patent metadata

Field	Value
Publication number	US-12275672-B2
Application number	US-202318467713-A
Country	US
Kind code	B2
Filing date	Sep 14, 2023
Priority date	Mar 15, 2023
Publication date	Apr 15, 2025
Grant date	Apr 15, 2025

Abstract

The present disclosure provides a method, a system for dehydrating a gasification fine slag, and a medium thereof. The method is performed by a processor controlling a dehydration device or a detection device, and the detection device is configured to detect at least one of physical properties or chemical properties of a gasification fine slag to be dehydrated. The method includes controlling the detection device to determine characteristic parameters of the gasification fine slag to be dehydrated, and determining a judgmental characteristic index of a dehydration moder of the gasification fine slag to be dehydrated. The method includes determining a target dehydration device and controlling the target dehydration device to dehydrate the gasification fine slag to be dehydrated. The method further includes controlling the detection device to determine a residual moisture content of a dehydrated gasification fine slag, and determining whether to end a dehydration task.

First claim

What is claimed is:

1. A method for dehydrating a gasification fine slag based on multi-energy field gradient processing intelligent decision, wherein the method is performed by a processor controlling a dehydration device and/or a detection device, the dehydration device includes an ultrasonically coupled vacuum dehydration device, a vibratory hot press dehydration device, and an ultrasonically coupled evaporative drying device, the detection device is configured to detect physical properties and/or chemical properties of a gasification fine slag to be dehydrated, the method comprising:
S 1 : for any gasification fine slag to be dehydrated, a first dehydration mode is selected first:
S 11 : the detection device is controlled to determine a moisture content W, an average particle size D, a pore volume V, and a dry basis ash content Ash of the gasification fine slag to be dehydrated, and a judgmental characteristic index x of the dehydration mode is calculated based on a detection result obtained from the detection device through the following formula:

x
=

W
V

⁢

(

D
50

)

1.16

⁢

(

Ash
0.6

)

1.32

S 12 : a corresponding first dehydration mode is selected from a preset database based on the calculated judgmental characteristic index x of the dehydration mode, wherein the preset database being stored in the processor and/or other storage devices to which the processor is communicatively connected, and the preset database includes at least one or more preset dehydration mode:
when x>7, the gasification fine slag enters the ultrasonically coupled vacuum dehydration device for dehydration;
when 7≥x>3, the gasification fine slag enters the vibratory hot press dehydration device for dehydration;
when x≤3, the gasification fine slag enters the ultrasonically coupled evaporative drying device for dehydration;
S 2 : after a first dehydration process is completed, the detection device is controlled to detect a residual moisture content of the gasification fine slag and compare the residual moisture content of the gasification fine slag with a set dehydration value, and if dehydration requirements are satisfied, a dehydration task is ended; otherwise, the judgmental characteristic index x of the dehydration mode is calculated again, and the dehydration mode is selected according to a condition of S 12 to continue dehydrating until the gasification fine slag satisfies the dehydration requirements.

2. The method of claim 1 , wherein the pore volume is measured using a Barret Joyner Halenda (BJH) method.

3. The method of claim 1 , wherein in the ultrasonically coupled vacuum dehydration device,
the processor controls a vacuum degree of a vacuum suction filter to be above 0.08 MPa, service power of an ultrasonic generator to be 400 W, and a single processing time of the ultrasonically coupled vacuum dehydration device to be 60 S.

4. The method of claim 1 , wherein in the vibratory hot press dehydration device,
a mechanical vibration force pressure intensity of the vibratory hot press dehydration device is 3 MPa and a vibration frequency of the vibratory hot press dehydration device is 20 Hz, a mechanical static pressure intensity is 8 MPa, and a single processing time of the vibratory hot press dehydration device is 90 S.

5. The method of claim 1 , wherein
a temperature of the ultrasonically coupled evaporative drying device is 100° C., during processing, a residual moisture content of the current gasification fine slag is determined every 10 min by sampling until the moisture content reaches the set dehydration value, and the dehydration task is ended.

Assignees

• Univ China Mining

Inventors

• Zhang Yixin
• Wu Jianjun
• Xi Yangchun
• Xue Manman
• Li Yan
• Guo Fanhui

Classifications

• C04B5/06

  Ingredients, other than water, added to the molten slag {or to the granulating medium or before remelting}; Treatment with gases or gas generating compounds, e.g. to obtain porous slag · CPC title

• C02F2209/02

  Temperature · CPC title

• C02F2209/006

  comprising a software program or a logic diagram · CPC title

• C02F2103/34

  from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 · CPC title

• C02F11/122

  using filter presses (C02F11/123 takes precedence) · CPC title