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Method for improving slurry-forming ability of sludge and coal-water slurry by cracking sludge flocculation through ultrasonic waves

A technology of ultrasonic wave and sludge water, applied in the direction of water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc., can solve the problems of poor slurry forming properties, improve slurry forming properties, easy method, The effect of low energy consumption

Inactive Publication Date: 2017-09-15
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the existing technical problems, the present invention provides a method for improving the slurryability of sludge coal-water slurry by using ultrasonic waves to crack sludge flocs, with the purpose of overcoming the problem of poor slurryability in the existing sludge coal-water slurry technology

Method used

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  • Method for improving slurry-forming ability of sludge and coal-water slurry by cracking sludge flocculation through ultrasonic waves
  • Method for improving slurry-forming ability of sludge and coal-water slurry by cracking sludge flocculation through ultrasonic waves
  • Method for improving slurry-forming ability of sludge and coal-water slurry by cracking sludge flocculation through ultrasonic waves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Implementation method

[0036] Sludge is taken from the surplus sludge produced by a sewage treatment plant. After different degrees of mechanical dehydration, sludge samples with moisture content of 90%, 95% and 98% are formed, which are used for ultrasonic modification and subsequent sewage treatment. Slurry.

[0037] The probe-type ultrasonic chemical treatment system is adopted, and the equipment consists of three parts: generator, transducer and ultrasonic probe. The ultrasonic frequency is 20 kHz, the ultrasonic power is set to 190 W, and the ultrasonic input specific energy is selected as 0 (ie without ultrasonic treatment), 3.8, 7.5, 15, 30, and 75 kJ / g DS.

[0038] When the modified sludge is used to make coal-water slurry, the mass ratio relationship of each raw material component is: sludge converted according to the moisture content of 90%: dry coal powder = 30: 100, additive: dry coal powder = 0.8: 100. The additive is naphthalene sulfonate formaldehy...

Embodiment 2

[0046] (1) Implementation method

[0047] The sludge is taken from the surplus sludge produced by a sewage treatment plant. After a certain degree of mechanical dehydration, sludge samples with a moisture content of 95% are formed, which are used for ultrasonic modification and subsequent sludge coal-water slurry production.

[0048] Same as Example 1, a probe-type sonochemical treatment system is used, which consists of three parts: a generator, a transducer and an ultrasonic probe. The ultrasonic frequency is 20 kHz, the ultrasonic power is set to 114 W, 190 W and 266 W, respectively, and the ultrasonic input specific energy is 75 kJ / g DS.

[0049] When the modified sludge is used to make coal-water slurry, the mass ratio relationship of each raw material component is: sludge converted according to the moisture content of 90%: dry coal powder = 30: 100, additive: dry coal powder = 0.8: 100. The additive is naphthalene sulfonate formaldehyde condensate. The solid mass conce...

Embodiment 3

[0056] (1) Implementation method

[0057] The sludge is taken from the surplus sludge produced by a sewage treatment plant. After a certain degree of mechanical dehydration, sludge samples with a moisture content of 95% are formed, which are used for ultrasonic modification and subsequent sludge coal-water slurry production.

[0058] The sludge was modified by a multi-frequency ultrasonic cell breaker. The ultrasonic frequencies were 15 kHz, 25 kHz, and 35 kHz, the ultrasonic power was set to 325 W, and the ultrasonic input specific energy was 4 kJ / g DS and 30 kJ / g DS, respectively.

[0059] Coal water slurry adopts the finished product prepared in advance, the additive is lignin sulfonate when making coal water slurry, and the mass ratio relationship between additive and dry coal powder is 0.8:100.

[0060] The modified sludge is mixed into the coal-water slurry and fully stirred to form a uniform sludge-coal-water slurry sample. The mass ratio of the sludge mixed is: sludge...

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Abstract

The invention discloses a method for improving slurry-forming ability of sludge and coal-water slurry by cracking sludge flocculation through ultrasonic waves. The ultrasonic waves are used for modifying sludge, microbial cell walls in a sludge floc structure and the sludge are broken by high-temperature high-pressure environments and shearing action generated by ultrasonic cavitation action, sludge particle granularity is reduced, part of interstitial water is released, the modified sludge is mixed with coal, slurry-forming additives, water and the like to prepare the sludge and coal-water slurry, or finished coal-water slurry is doped into the modified sludge and uniformly stirred to prepare the sludge and coal-water slurry. Compared with the prior art, the method has the advantages that the slurry-forming viscosity of the sludge and coal-water slurry can be obviously reduced, slurry-forming concentration is increased, the sludge and coal-water slurry with excellent slurry-forming ability is obtained, treatment time is short, operation is convenient, and the method is applicable to large-scale popularization and application.

Description

technical field [0001] The invention relates to a method for improving the slurryability of sludge coal-water slurry, in particular to modifying sludge by ultrasonic waves, and mixing modified sludge, coal, pulping additives, water, etc. to prepare sludge Coal water slurry, or the technical method of directly mixing modified sludge into the finished product coal water slurry to form sludge coal water slurry, and using ultrasonic cavitation to break the sludge floc structure and improve the slurry forming property of the slurry. Background technique [0002] With the rapid development of society and economy, my country's demand for energy continues to increase, and the demand for high-quality energy such as oil and natural gas is showing an accelerated growth trend. In 2016, my country's annual cumulative import of petroleum was 381.01 million tons, a cumulative increase of 13.56% year-on-year. For a period of time to come, my country's economy will continue to develop at a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32C10L1/24C02F11/00
CPCC10L1/32C02F11/00C10L1/2462
Inventor 王睿坤赵争辉刘志坚尹倩倩
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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