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Device and method for testing slit/sludge dehydration rate in multi-physics field condition

A multi-physics field and sludge dewatering technology, applied in the fields of geotechnical engineering, environmental science and engineering, can solve the problems of high energy consumption, lack of theoretical and experimental data support, and low efficiency

Pending Publication Date: 2017-05-31
湖北水总水利水电建设股份有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the vacuum preloading method, surcharge method, electroosmosis method, and filter press method are widely used, all of which use a single physical field, which consumes a lot of energy and has low efficiency.
Using multi-physics field coupling to improve the dehydration rate of silt / sludge soil will be the trend of future development, but the technical treatment methods such as vacuum combined electroosmosis and vacuum combined heap loading that use the above methods are lack of corresponding theoretical and experimental data support

Method used

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  • Device and method for testing slit/sludge dehydration rate in multi-physics field condition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like figure 1 As shown, a device for testing the dehydration rate of silt / sludge under multi-physics field conditions includes the first upper mouth suction filter bottle 3, and also includes a ceramic Buchner funnel 6, the cylinder of the ceramic Buchner funnel 6 rests on the bracket 7, the long-necked end of the ceramic Buchner funnel 6 passes through the bracket 7 and the first rubber stopper 5 arranged on the mouth of the first upper mouth suction filter bottle 3 and extends into the first upper mouth suction filter bottle 3, A silt / sludge sample 10 is arranged in the barrel of the ceramic Buchner funnel 6, and the top and bottom layers of the silt / sludge sample 10 are respectively provided with an upper electrode plate with holes 9b and a lower electrode plate with holes 9a, and the lower electrode plate with holes 9a Located on the filter paper 8, the cylinder mouth of the ceramic Buchner funnel 6 is wrapped by a rubber film 12, and the rubber film 12 is provided ...

Embodiment 2

[0035] Use the device of testing silt / sludge dewatering rate under multi-physics field conditions described in embodiment 1 to carry out a kind of test method of silt / sludge soil dewatering rate under multi-physics coupling, comprising the following steps:

[0036] Step 1. Turn on the vacuum pump 28 and set the negative pressure value of the vacuum pump 28. The negative pressure value can be -10kPa or -20kPa or -30kPa or -40kPa or -50kPa or -60kPa or -70kPa or -80kPa or -90kPa;

[0037] Step 2. Turn on the air compressor 20, and control the pressure of the piston 14 through the air pressure controller 19, so that the piston 14 extends out of the piston cylinder 15 and closely contacts the pressure transmission plate 13, so that the overlying pressure of the silt / sludge sample 10 reaches the set value Pressure value, the pressure value can be 10KPa or 20kPa or 30kPa or 40kPa or 50kPa or 100kPa or 200kPa or 300kPa or 400kPa;

[0038] Step 3: Turn on the rectifier transformer 9e ...

Embodiment 3

[0043] In Example 2, step 1, step 2 and step 3 are carried out at the same time, and the dehydration rate under the coupling action of static force field-vacuum pressure field-electric field can be obtained through step 4, step 5 and step 6.

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Abstract

The invention discloses a device and method for testing a slit / sludge dehydration rate in a multi-physics field condition. A long-neck end of a ceramic Buchner funnel passes through a first rubber stopper to the inside of a first upper tip suction flask; a slit / sludge sample is arranged in a tube part of the ceramic Buchner funnel; a perforated upper electrode plate and a perforated lower electrode plate are arranged on a top layer and a bottom layer of the slit / sludge sample; the device also comprises a loading device for loading the slit / sludge sample; and the first upper tip suction flask is connected with a vacuum pump through a second upper tip suction flask. The invention further discloses a method for testing the slit / sludge dehydration rate in the multi-physics field condition. Coupling of a vacuum pressure field, static and dynamic pressure fields and an electric field can be achieved, combined parameters of the static pressure, the vibration frequency, the vacuum degree, the voltage and the current can be conveniently and quickly optimized employing the dehydration rate as an evaluation indicator, and the soil structure change law in or after the slit / sludge dehydration process can be evaluated by using the resistivity.

Description

technical field [0001] The invention relates to the fields of geotechnical engineering, environmental science and engineering, in particular to a device for testing the dewatering rate of silt / sludge under the condition of multiple physical fields, and more specifically to a device for testing the dewatering rate of silt / sludge under the condition of multiple physical fields Methods. Applicable but not limited to testing the dehydration rate of silt / sludge soil of various types of soft soil, silt soil and polluted soil under various physical field coupling conditions, these physical fields include pressure field (including vacuum pressure field and various static and dynamic pressure field), electric field, etc. Background technique [0002] Due to the high moisture content of silt, the extremely low disturbance intensity, and the slow consolidation of normal drainage, a large amount of silt / sludge needs to be set up as a silt storage yard, which occupies a large amount of ...

Claims

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Application Information

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IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 朱栋梁柏巍王唯伟朱丹孔令伟黎澄生安然
Owner 湖北水总水利水电建设股份有限公司
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