Sea sand treatment process

A treatment process, sea sand technology, applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. The problem of low ion removal efficiency, etc., achieves the effect of reducing water consumption, good economic and environmental benefits, and realizing resource utilization.

Inactive Publication Date: 2020-12-29
南通市展成商品混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the removal efficiency of chloride ions in this purification treatment process is not high, and the water consumption is large.
[0005] For the above-mentioned related technologies, the inventor believes that there is a defect that the removal efficiency of chloride ions is not high and the water consumption is large

Method used

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  • Sea sand treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A sea sand treatment process, comprising the following steps:

[0040] (1) Screening: vibrating screen the raw sand to remove impurities such as shells and gravels in the sea sand; crush the shells, gravels and other impurities obtained from the screening, and recycle them as raw materials for cement bricks to achieve solid Recycling and recycling of waste;

[0041] (2) Dechlorination: Transport the sieved sea sand to the dechlorination tank, immerse in the dechlorination agent and stir the sea sand for dechlorination. The dechlorination agent uses ozone water solution with a mass concentration of 30mg / L, and the dechlorination time is 30min . The dechlorination pool is equipped with a gas collection hood and an absorption pool. The absorption pool is filled with scrap iron scraps and 3% hydrogen chloride solution. The scrap iron scraps react with the hydrogen chloride solution to form a ferrous chloride solution. The chlorine gas produced is collected by the gas colle...

Embodiment 2

[0048] A sea sand treatment process, comprising the following steps:

[0049] (1) Screening: vibrating screen the raw sand to remove impurities such as shells and gravels in the sea sand; crush the shells, gravels and other impurities obtained from the screening, and recycle them as raw materials for cement bricks to achieve solid Recycling and recycling of waste.

[0050] (2) Dechlorination: Transport the sieved sea sand to the dechlorination tank, immerse in the dechlorination agent and stir the sea sand for dechlorination. The dechlorination agent uses ozone water solution with a mass concentration of 65mg / L, and the dechlorination time is 75min . The dechlorination pool is equipped with a gas collection hood and an absorption pool. The absorption pool is filled with scrap iron scraps and 7% hydrogen chloride solution. The scrap iron scraps react with the hydrogen chloride solution to form a ferrous chloride solution. The chlorine gas produced is collected by the gas colle...

Embodiment 3

[0057] A sea sand treatment process, comprising the following steps:

[0058] (1) Screening: vibrating screen the raw sand to remove impurities such as shells and gravels in the sea sand; crush the shells, gravels and other impurities obtained from the screening, and recycle them as raw materials for cement bricks to achieve solid Recycling and recycling of waste.

[0059] (2) Dechlorination: Transport the sieved sea sand to the dechlorination pool, immerse in the dechlorination agent and stir the sea sand for dechlorination. The dechlorination agent uses ozone water solution with a mass concentration of 100mg / L, and the dechlorination time is 120min . The dechlorination pool is equipped with a gas collection hood and an absorption pool. The absorption pool is filled with scrap iron scraps and 10% hydrogen chloride solution. The scrap iron scraps react with the hydrogen chloride solution to form a ferrous chloride solution. The chlorine gas produced is collected by the gas co...

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Abstract

The invention relates to a sea sand treatment process, which comprises the following steps: (1) screening: removing impurities such as shells, gravels and the like in raw sand through vibration screening; (2) dechlorinating: conveying the screened sea sand, soaking the sea sand into a dechlorinating agent, and dechlorinating by adopting an ozone aqueous solution; (3) sand washing: conveying the dechlorinated sea sand to a washing pool, and washing the sea sand with washing water; and (4) dehydrating: dehydrating the cleaned sea sand to obtain finished sand. According to the invention, the strong oxidizing property of the dechlorinating agent oxidizes the chlorine ions in the sea sand into chlorine gas and discharges the chlorine gas, so that the chlorine ions are separated from the sea sand, and the dechlorinating efficiency of the sea sand is improved along with the increase of the concentration of ozone water and the increase of the dechlorinating time; and the dechlorinated sea sandis flushed by utilizing the washing water to remove residual chlorine ions and part of soil in the sea sand, so that the content of the soil and the content of mud blocks are reduced while the chlorine ions in the sea sand are further reduced, and the effects of improving the sea sand purification efficiency and reducing the water consumption are achieved.

Description

technical field [0001] The present application relates to the technical field of sea sand treatment, in particular to a sea sand treatment process. Background technique [0002] With the rapid development of my country's construction market, river sand resources are increasingly scarce, which can no longer meet the demand for construction raw materials, and the over-exploitation of river sand has brought serious damage to the natural landscape and ecological environment. The eastern coastal areas of my country are rich in sea sand resources, and the rational development and utilization of local sea sand resources is of great significance for alleviating the shortage of river sand resources and protecting the ecological environment. [0003] However, since sea sand contains salts such as magnesium chloride and sodium chloride, when sea sand is used as concrete raw material, the chloride salt contained in sea sand will cause corrosion of steel bars, damage the passive film on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/02C04B14/28C04B14/04C01G49/10C02F1/52C04B14/06
CPCC01G49/10C02F1/5236C04B14/04C04B14/28C04B20/023C04B20/02C04B14/068
Inventor 征波
Owner 南通市展成商品混凝土有限公司
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