Dissolved gas and reagent integrated vacuum preloading method

A vacuum pre-pressing method, dissolved gas technology, applied in chemical instruments and methods, dewatering/drying/concentrated sludge treatment, water/sludge/sewage treatment, etc., can solve the problem of reducing permeability coefficient, affecting treatment effect and cost problems such as high cost, to achieve the effect of increasing the permeability coefficient, improving the treatment effect, and increasing the living space

Active Publication Date: 2016-06-08
SHANGHAI UNIV
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Problems solved by technology

[0002] The research group has applied on June 13, 2015 for "a chemical vacuum preloading method for treating engineering waste mud (application number is 2015103224456)". For general engineering waste mud, etc., the treatment effect is very obvious. However, for engineering waste pulp with high organic content and high salt content, dredging sludge with high clay content, and ultra-high water content sludge containing a large number of anaerobic bacteria, proteins, and polysaccharides, there are still the following deficiencies: ( 1) In the middle and late stages of chemical pre-pressurization and vacuuming, due to the decrease of void ratio, the permeability coefficient also decreases, the pumping efficiency becomes slower and slower, and the treatment efficiency is not high; (2) For deeper in-situ filling For sludge or engineering waste slurry, the mixing equipment is huge and the mixing cost is high, which will affect its further promotion and applicatio

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[0032] Example one

[0033] The dissolved gas-medicament vacuum precompression method of the present invention includes the following steps:

[0034] (1) Take samples of engineering waste slurry on site, and measure and analyze special physical and chemical properties such as moisture content, particle composition, mineral composition, PH value, and specific gravity.

[0035] (2) Determine the addition amount and parameters of the first chemical agent A, the second chemical agent B, the third chemical agent C, and the dissolved gas D according to the analysis result of step (1), the first chemical agent A, the second chemical agent B. The mixing ratio of the third chemical agent C is about 0.01%~0.6%, 0.05%~0.4%, 0.001%~0.1%, the pressure of the dissolved gas D is 0~0.6MPa, and the temperature is 0~60 degrees. For example, the mixing ratios of the first chemical agent A, the second chemical agent B, and the third chemical agent C in the first embodiment are about 0.3%, 0.2%, and 0.0...

Example Embodiment

[0049] Example two

[0050] The second embodiment is basically the same as the first embodiment, except that the mixing ratios of the first chemical agent A, the second chemical agent B, and the third chemical agent C are about 0.01%, 0.05%, and 0.001%, respectively.

Example Embodiment

[0051] Example three

[0052] The third embodiment is basically the same as the first embodiment, except that the mixing ratios of the first chemical agent A, the second chemical agent B, and the third chemical agent C are about 0.6%, 0.4%, and 0.1%, respectively.

[0053] The above construction process is a conventional procedure for solid-liquid separation of dissolved gas-medicament vacuum preloading method. When dissolved gas is used as the carrier medium, steps 3 and 4 in the specific implementation steps can be combined into: the gas is used according to the determined parameters The first chemical agent A, the second chemical agent B, and the third chemical agent C are injected into the waste slurry. When it is necessary to add dissolved gas during the vacuum pre-compression process, step 4 can be moved to after step 8, and the dissolved gas can be injected continuously or intermittently as needed during the vacuum pre-compression process.

[0054] In the specific implementat...

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Abstract

The invention provides a dissolved gas and reagent integrated vacuum preloading method. The method includes steps: step one, sampling engineering waste slurry on site; step two, determining chemical reagents, dissolved gas and the like according to analysis results acquired at the step one; step three, designing a waste slurry settling tank and the like; step four, feeding the waste slurry into the settling tank to a certain height through a pumping pipe; step five, sequentially feeding the chemical reagents and the like into the settling tank through the pumping pipe; step six, feeding the dissolved gas into the waste slurry through a gas adding device and a gas injection pipe; step seven, standing a waste slurry mixture with the chemical reagents; step eight, arranging transverse drainage pipes and vertical drainage pipes in a separation tank; step nine, using a pump for pumping precipitations into a solid-liquid separation tank with a vacuum network drainage system; step ten, step ten, starting vacuum loading after arrangement is finished; step eleven, stopping vacuum loading; step twelve, demounting the vacuum network drainage system after vacuum loading is finished. By the dissolved gas and reagent integrated vacuum preloading method, thorough solid-liquid separation can be realized.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering and environmental protection, and in particular relates to a dissolved gas-medicine vacuum preloading method. Background technique [0002] The research group has applied on June 13, 2015 for "a chemical vacuum preloading method for treating engineering waste mud (application number is 2015103224456)". For general engineering waste mud, etc., the treatment effect is very obvious. However, for engineering waste pulp with high organic content and high salt content, dredging sludge with high clay content, and ultra-high water content sludge containing a large number of anaerobic bacteria, proteins, and polysaccharides, there are still the following deficiencies: ( 1) In the middle and late stages of chemical pre-pressurization and vacuuming, due to the decrease of void ratio, the permeability coefficient also decreases, the pumping efficiency becomes slower and slower, and the treatm...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/14
CPCC02F11/00C02F11/14
Inventor 武亚军骆嘉成顾赛帅卢立海强小兵陆逸天
Owner SHANGHAI UNIV
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