A kind of high-efficiency sedimentation method of waste slurry in concrete batching plant

A mixing station and concrete technology, which is applied in the field of high-efficiency settlement of waste slurry in concrete mixing stations, can solve the problems of large area of ​​processing equipment, low water utilization rate of waste slurry, low solid content of settled slurry, etc., and achieve low production cost, The effect of low energy consumption and enhanced dispersion performance

Active Publication Date: 2022-07-01
CHINA WEST CONSTR ACAD OF BUILDING MATERIALS CO LTD
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Problems solved by technology

[0005] In view of the above-mentioned deficiencies, the purpose of the present invention is to provide a high-efficiency settlement method for waste slurry in concrete mixing plants, which can effectively solve the problems of low solid content of settled slurry, high post-processing energy consumption, and water utilization rate of waste slurry in the existing waste slurry separation technology. Problems with low and large floor space for handling equipment

Method used

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  • A kind of high-efficiency sedimentation method of waste slurry in concrete batching plant

Examples

Experimental program
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Effect test

Embodiment 1

[0029] In this example, take 200kg of waste pulp with a solid content of 15wt%, add 0.1kg of polyethylene glycol monomethyl ether and 0.05kg of acrylic acid-isoamyl polyoxyethylene ether copolymer, and stir at 200rpm for 2 minutes. Add 1 kg of anionic polyacrylamide with a mass concentration of 0.1% and a molecular weight of 6 million g / mol, and 0.2 kg of sodium polyacrylate with a mass concentration of 0.1% and a molecular weight of 2 million g / mol, respectively, stir at a speed of 60 rpm for 6 minutes and then let it settle. , suck out the upper layer of clear water after settling for 1 hour, 6 hours and 24 hours, respectively, and take 200g of waste pulp to test the solid content.

Embodiment 2

[0031] In this example, take 200kg of waste pulp with a solid content of 20wt%, add 0.1kg of polyethylene glycol monomethyl ether monophosphate and 0.05kg of acrylic acid-maleic anhydride-methallyl polyoxyethylene ether copolymer, respectively, at 300 rpm Stir at a rotational speed for 2 minutes. After stirring, add 1 kg of anionic polyacrylamide with a mass concentration of 0.1% and a molecular weight of 8 million g / mol and 0.2 kg of sodium polyacrylate with a mass concentration of 0.1% and a molecular weight of 3 million g / mol. After stirring for 8 minutes at the rotating speed, it was left to settle, and after settling for 1 hour, 6 hours, and 24 hours, the upper layer of clear water was sucked out, and 200 g of waste pulp was taken to test the solid content.

Embodiment 3

[0033] In this example, take 200 kg of waste pulp with a solid content of 25 wt%, add 0.2 kg of maleic anhydride polyethylene glycol monomethyl ether monoester and 0.06 kg of maleic anhydride-allyl polyoxyethylene ether copolymer, and stir at 400 rpm. For 1 minute, after stirring, add 2kg of dimethyl diallyl ammonium chloride-acrylamide copolymer with a mass concentration of 0.1% and a molecular weight of 8 million g / mol and a polymer with a mass concentration of 0.1% and a molecular weight of 3 million g / mol. Potassium acrylate 0.4kg, stirred at 60rpm for 8 minutes and then left to settle, suck out the upper layer of clear water after 1 hour, 6 hours and 24 hours of sedimentation respectively, and take 200g of waste pulp to test the solid content.

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Abstract

The invention discloses a high-efficiency sedimentation method for waste slurry in a concrete mixing station, belonging to the technical field of sedimentation and concentration of waste slurry in a concrete mixing station. The sedimentation method mainly includes the following steps: step (1): adding a dispersant to the waste slurry to be treated, Stirring at a rotating speed of not less than 200 rpm; Step (2): adding a settling agent after the stirring in step (1), stirring at a rotating speed of 50-100 rpm, and then standing for settling. The present invention proposes a method for realizing efficient sedimentation of waste slurry in concrete mixing plants, which can achieve high-efficiency sedimentation of waste slurry in a concrete mixing station by first dispersing quickly and then slowly sedimenting. The flocculation structure in the waste slurry particles is destroyed by a dispersant, and the encapsulated water is released, and then a sedimentation agent is added to perform slow sedimentation. , can obtain high solid content of waste slurry solid, effectively solve the problems of low solid content of sedimentation slurry, high post-processing energy consumption, low utilization rate of waste slurry water and large area of ​​treatment equipment in the existing waste slurry separation technology.

Description

technical field [0001] The invention relates to the technical field of sedimentation and concentration of waste slurry of a mixing station, in particular to an efficient sedimentation method of waste slurry of a concrete mixing station. Background technique [0002] Waste water is the liquid slurry after the sand and gravel are separated from the waste water and waste residues generated after the concrete production, transportation and construction related equipment are cleaned by the sand and gravel separation equipment. According to statistics, in 2019, my country's commercial concrete production reached 2.378 billion cubic meters, with an average annual output of nearly 100 million tons of waste slurry water. The pH of the wastewater is greater than or equal to 11. If it is directly discharged without disposal, it will cause great harm to the ecology and does not conform to the concept of green development. [0003] At present, the main disposal methods of waste slurry w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D21/02B01D21/01B01D21/28
CPCB01D21/02B01D21/01B01D21/286
Inventor 杨文高育欣刘明张磊曾超吴雄高达马建峰
Owner CHINA WEST CONSTR ACAD OF BUILDING MATERIALS CO LTD
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