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A method and device for producing dry powder fire extinguishing agent by using fly ash to synthesize zeolite to treat wastewater

A technology of fly ash zeolite and dry powder fire extinguishing agent, which is applied in chemical instruments and methods, fire prevention equipment, chemical/physical processes, etc., and can solve the problems of wastewater treatment failing to meet discharge standards, waste of resources, and unused residues, etc.

Active Publication Date: 2021-05-07
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The disadvantages of these methods mentioned above are: for the treatment of wastewater, only relying on the adsorption of fly ash itself or slightly modifying it, the treatment effect of wastewater may not reach the discharge standard allowed by the state, and The residue after filtering wastewater has not been utilized, which wastes resources and may cause secondary pollution; for the production of ammonium phosphate dry powder fire extinguishing agent, there is a problem that the raw materials are too single, and it is urgent to find other alternative substances

Method used

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  • A method and device for producing dry powder fire extinguishing agent by using fly ash to synthesize zeolite to treat wastewater
  • A method and device for producing dry powder fire extinguishing agent by using fly ash to synthesize zeolite to treat wastewater

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Effect test

Embodiment 1

[0046] First, the power plant fly ash (the molar ratio of silicon and aluminum contained in it is 1.8) is synthesized into zeolite. The specific operation is as follows: the activator NaOH solid and fly ash are fully mixed according to the mass ratio of 1.2:1, and after mixing evenly, the Roast at a high temperature of 550°C for 2 hours, add the roasted product to distilled water at a liquid-solid ratio of 6:1, stir and age for 12 hours, and then carry out crystallization at 100°C for 9 hours, at which point the conversion of fly ash to zeolite is completed.

[0047] followed by figure 1 As shown, the fluidized bed reactor includes a main tank, a pH regulator 2, an inlet throttle valve 3, an outlet throttle valve 8, a reactor wall 4, a partition 5 and a stretchable reaction chamber 6, and the upper end of the main tank is provided with The reactor wall 4 is provided with a fluid inlet 1 at the top of the reactor wall 4, an inlet throttling valve 3 is arranged between the fluid...

Embodiment 2

[0050] The process and parameters of preparing zeolite from fly ash are the same as in Example 1, but the difference is that the final ground powder and other materials are proportioned according to the following mass fractions: 60 parts of prepared powder, sodium chloride 25 parts, 8 parts of silicone oil, 8 parts of hydrophobic white carbon black, 14 parts of mica, are made into another novel dry powder fire extinguishing agent within the proportioning range.

[0051] Due to the different addition ratios of the components in the proportioning, the actual effects obtained are also different: under the premise that both can meet the basic requirements of general-purpose dry powder fire extinguishing agents, compared with the dry powder fire extinguishing agent obtained in Example 1, Embodiment 2 is due to The proportion of powder increases, the original zeolite content in the powder is more than that of Example 1, and the proportions of silicone oil, hydrophobic silica, mica, e...

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Abstract

The present invention relates to a method and device for making dry powder fire extinguishing agent by using fly ash to synthesize zeolite to treat waste water, which comprises the following steps: S1, fly ash is processed by alkali fusion-crystallization method to synthesize fly ash Zeolite; S2. Fully mix the wastewater to be treated with the aqueous solution of phosphate ion and magnesium ion as a mixed solution, and react the mixed solution in a fluidized bed reactor with a pH regulator under the assistance of fly ash zeolite , and then, drying the fine crystals formed by fly ash zeolite, and grinding them into powder; S3, adding sodium chloride, silicone oil, hydrophobic white carbon black and mica to the powder obtained in step S2 to make a new dry powder fire extinguishing agent. The invention efficiently utilizes the fly ash of industrial waste, and is simultaneously applied to two fields of water treatment and fire protection, and the economic benefit and environmental benefit are also very remarkable.

Description

technical field [0001] The invention relates to a method and a device for preparing a dry powder fire extinguishing agent by using fly ash to synthesize zeolite to treat waste water, and belongs to the technical field of comprehensive utilization of fly ash. Background technique [0002] With the rapid development of the economy, people's demand for electricity continues to increase, and thermal power generation still occupies a major position in the electricity production structure, so a large amount of industrial waste-fly ash is produced every year. According to statistics from relevant departments: In 2016, pulverized coal The total production of ash was 655 million tons, the total production of fly ash was 686 million tons in 2017, and this figure is expected to reach 781 million tons in 2020. Although the utilization rate of fly ash has been increasing continuously in recent years, there are still a lot of fly ash that are not effectively utilized every year, occupying...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D1/00B01J8/24
CPCA62D1/0014B01J8/24
Inventor 崔家新王连勇薛海月韩建丽孙延文蔡九菊
Owner NORTHEASTERN UNIV LIAONING