Novel efficient sludge curing agent prepared from ardealite solid waste and preparation method thereof

A sludge curing agent, phosphogypsum technology, applied in chemical instruments and methods, solid waste removal, fixed/solidified sludge treatment, etc., can solve the problems of unfavorable sludge follow-up treatment, poor durability, difficult to mix evenly , to achieve the effect of improving the powder coating effect, improving the contact sufficiency, and improving the bonding tightness.

Inactive Publication Date: 2021-06-22
刘志浩
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) In the existing conventional practice, cement and lime are added to the sludge as solidifying agents. Ordinary cement and lime coagulate and harden slowly. They will partially settle before coagulation under the condition of high water-solid ratio, and the curing effect is poor. It is not conducive to the subsequent treatment of sludge;
[0004] (2) Sludge curing agent is widely used in practical applications due to its advantages of less dosage, easy transportation, convenient construction, and strong adaptability to soil, but there are also differences in the strength of the soil after curing, poor durability, and anti-penetration Low water resistance, poor water resistance, heavy metal exudation rate in the sludge after solidification exceeds the standard, etc.
[0005] In addition, the existing equipment for powder coating usually uses high-speed stirring to mix the powder and the coating agent and make them fully rubbed so that the coating agent adheres to the surface of the powder particles. However, during use, the coating The equipment mixes, rubs and coats the powder particles and the coating agent by stirring, and it is difficult to mix evenly, and the coating effect of the powder particles is poor. High-speed rotation, high energy consumption

Method used

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  • Novel efficient sludge curing agent prepared from ardealite solid waste and preparation method thereof
  • Novel efficient sludge curing agent prepared from ardealite solid waste and preparation method thereof
  • Novel efficient sludge curing agent prepared from ardealite solid waste and preparation method thereof

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preparation example Construction

[0044] A preparation method for preparing a novel high-efficiency sludge solidifying agent from phosphogypsum solid waste, the preparation method is applicable to the preparation of a novel high-efficiency sludge solidifying agent from the aforementioned phosphogypsum solid waste; the preparation method comprises the following steps:

[0045] S1: Crushing and grinding quicklime to obtain quicklime powder; at the same time, pulverizing and grinding phosphogypsum, and putting the ground powder into a rotary kiln for high-temperature calcination to obtain phosphogypsum powder;

[0046] S2: Put phosphogypsum powder, quicklime powder, fly ash, ordinary Portland cement (P.O 42.5), quick-setting agent, water reducer, and triethanolamine into the stirring tank in turn on the basis of step S1, and fully stir , to obtain the first mixture;

[0047] S3: put the mineralizer into the amplification culture tank, and the population of carbonate mineralizing bacteria and phosphate mineralizin...

Embodiment approach

[0055] As an embodiment of the present invention, in the sludge solidifying agent preparation step, a coating device is used to coat the quicklime powder and 1 / 2 of the zeolite powder adsorbed with the mineralizer;

[0056] The coating device includes a main body 1; a partition 13 is fixedly installed in the main body 1; the partition 13 divides the space in the main body 1 into two parts of equal size, namely space one 11 and space two 12; An upper cover 14 is fixedly installed above the main body 1; a communication pipe 4 is fixedly installed on the upper cover 14; the communication pipe 4 communicates the space one 11 with the space two 12; the lower end of the communication pipe 4 is fixedly installed with Dispersion plate 41; the interior of the dispersion plate 41 is hollow, and the vertical side of the dispersion plate 41 is uniformly provided with through holes 411; the communication pipe 4 communicates with the internal space of the dispersion plate 41; the dispersion ...

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Abstract

The invention belongs to the technical field of ardealite solid waste recycling, and particularly relates to a novel efficient sludge curing agent prepared from ardealite solid waste and a preparation method thereof. The sludge curing agent is prepared from the following raw materials in percentage by mass: 65.1% of phosphogypsum, 14.2% of quick lime, 14.2% of ordinary Portland cement (P.O42.5), 2% of fly ash, 3% of an adsorbent, 1% of a mineralizer, 0.07% of an accelerator, 0.07% of a water reducing agent and 0.36% of triethanolamine. The production difficulty is low, the production cost is low, and the prepared curing agent has a good curing effect on sludge.

Description

technical field [0001] The invention belongs to the technical field of regeneration and utilization of phosphogypsum solid waste, in particular to a novel high-efficiency sludge solidifying agent for preparing phosphogypsum solid waste and a preparation method thereof. Background technique [0002] In many water conservancy projects and civil engineering projects such as ocean, lake, river dredging or urban subway construction, foundation pit excavation and other projects, a large amount of silt will be produced. These silts have high moisture content, high clay content, and extremely low strength. It is directly used as engineering fill and is usually disposed of by throwing mud. This disposal method will not only pollute the environment around the mud throwing point, but also occupy a large amount of farmland or fish ponds. In many earthwork projects such as reclamation projects, embankment projects, and road projects, a large amount of filling soil is required, and most ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00B09B3/00B01F7/08B01F13/02B01F3/12C04B28/14B01F33/40
CPCC02F11/008B09B3/00C04B28/143B01F23/511B01F23/56B01F23/53B01F27/726B01F33/405B01F33/4094
Inventor 刘志浩
Owner 刘志浩
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