Coal gasification coarse slag-based composite flocculant as well as preparation method and application thereof

A composite flocculant and coal gasification technology, which is applied in the field of solid waste recycling to achieve the effects of simple preparation method and improved flocculation performance

Active Publication Date: 2022-04-19
QILU UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, the research on new coal gasification slag-based materials has mainly focused on the extraction and utilization of a single element or certain components, and the technical bottleneck of its high-value comprehensive utilization has not yet been broken through, and it is still an urgent need for industrial investment. The key issue

Method used

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  • Coal gasification coarse slag-based composite flocculant as well as preparation method and application thereof
  • Coal gasification coarse slag-based composite flocculant as well as preparation method and application thereof
  • Coal gasification coarse slag-based composite flocculant as well as preparation method and application thereof

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Experimental program
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Effect test

preparation example Construction

[0027] A preparation method of a coal gasification coarse slag-based composite flocculant: the specific steps are: accurately weigh 20.0 g of coal gasification coarse slag and place it in a 250 mL beaker, add 200 mL of hydrochloric acid of different concentrations (1.0mol / L, 2.0mol / L L, 2.5mol / L, 3.0mol / L, 4.0mol / L hydrochloric acid solution) is placed on a magnetic stirrer and stirred for a period of acid leaching, after the acid leaching process is finished, use a vacuum filter to carry out suction filtration, Separation, the resulting filtrate is used to prepare a composite flocculant, and the filter residue can be used for other purposes. After the filtrate is left to mature for a period of time in a sealed state at room temperature, fluorescent green colloidal substances are finally formed; the colloidal substances are dried and ground evenly to make a coal gasification coarse slag-based multi-ion composite flocculant.

[0028] After the filtrate is left to mature for a p...

Embodiment 1

[0047] Simulated wastewater testing. Weigh 0.5 g of different types of multi-ion composite flocculants and dissolve them in 100 mL of deionized water for ultrasonic dissolution to prepare a flocculant solution. Weigh 10.0g of kaolin and dissolve it in water to prepare waste water, and test the flocculation effect.

[0048] Take 7 beakers, accurately measure 200mL of wastewater into the beakers, add different amounts (0.0mL, 1.0mL, 3.0mL, 5.0mL, 7.0mL, 10.0mL, 15.0mL) of flocculant solutions, and then Stir rapidly at a speed of 250r / min for 3min to mix evenly, then slowly stir at a speed of 135r / min for 20min, and measure the turbidity of the wastewater after standing for 25min.

[0049] Table 4 Removal of simulated wastewater turbidity by different types of multi-ion composite flocculants

[0050]

Embodiment 2

[0052] Simulate the removal of ammonia nitrogen from domestic wastewater. Weigh 0.5 g of self-made different types of multi-ion composite flocculants and dissolve them in 100 mL of deionized water for ultrasonic dissolution to prepare a flocculant solution. Weigh 10.0g of kaolin and 5.0g of ammonium chloride and dissolve in 5.0L of river wastewater to simulate domestic wastewater. Take 7 beakers, accurately measure 200mL of wastewater into the beaker, add different amounts (0.0mL, 1.0mL, 2.0mL, 3.0mL, 4.0mL, 5.0mL, 6.0mL) of flocculant solution, and then Stir quickly at a speed of 250r / min for 3 minutes to mix well, then slowly stir at a speed of 135r / min for 20 minutes, and measure the absorbance of ammonia nitrogen after standing for 25 minutes to test the treatment effect of the flocculant on ammonia nitrogen.

[0053] Table 5 Removal of ammonia nitrogen in simulated domestic wastewater by different types of multi-ion composite flocculants

[0054]

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Abstract

The invention relates to a coal gasification coarse slag-based composite flocculant as well as a preparation method and application thereof. The preparation method provided by the invention is simple, and the multi-ion composite flocculant can be prepared from the coal gasification slag in a bulk and high-valued manner. Due to the fact that the multi-ion composite flocculant contains various different ions, the use limitation of commercially available single-ion flocculants such as ferric trichloride hexahydrate and aluminum sulfate octadecahydrate is broken through, and due to the fact that the multi-ion composite flocculant contains various ions such as iron ions, aluminum ions and calcium ions. When the flocculant is used for treating wastewater, various ions generate a synergistic effect, so that the coagulation performance of the flocculant is improved, and practical application of wastewater with relatively complex components is facilitated.

Description

technical field [0001] The invention belongs to the technical field of solid waste recycling, and in particular relates to a coal gasification coarse slag-based composite flocculant and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] At present, the main direction of resource utilization of coal gasification slag at home and abroad is divided into two aspects: bulk utilization and high-value utilization. The former mainly focuses on the basic application of building materials and construction engineering, such as roadbed filling, mine filling, wall materials, cement raw materials, etc.; the latter mainly refers to the research and d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
CPCC02F1/5236
Inventor 申婷婷贺少仓孙静李天鹏邓浪孙晨旭潘昊其
Owner QILU UNIV OF TECH
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