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System for reusing purified dilute acid

A technology of dilute acid, purification and recycling, which is applied in the field of dilute acid purification and reuse system, can solve the problems of difficulty in work, waste of water resources, and water resources cannot be recycled, and achieves the effect of increasing economic benefits and reducing waste of resources.

Inactive Publication Date: 2014-02-12
岷山环能高科股份公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the normal production of the purification section, the efflux of dilute acid is 7-10m3 per hour. A large amount of dilute acid efflux brings certain difficulties to the next process, and wastes a lot of water resources, which cannot be recycled. use

Method used

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  • System for reusing purified dilute acid
  • System for reusing purified dilute acid

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Embodiment Construction

[0012] Such as figure 2 As shown, a purification dilute acid recycling system includes a purification circulation tank, a settling tank, a filter press, and a filtrate tank. It is characterized in that it also includes a water supply system, and the smelting flue gas is cooled and purified in the purification circulation tank. When dilute acid is produced, the dilute acid settles after being neutralized with milk of lime in the settling tank, and then enters the filter press to filter into a filter cake, and the filtrate filtered out of the filter press enters the filtrate tank ; At the back of the filtrate tank, add an anti-corrosion tower-free water supply system to allow the filtered water after pressure filtration to return to the purification circulation tank; the tower-free water supply system is used to supplement tap water to reduce the concentration of dilute acid, so that It will not lead to saturation of the circulating fluid concentration. The towerless water sup...

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Abstract

The invention relates to a system for reusing a purified dilute acid. The system comprises a purification circulating tank, a sedimentation tank, a filter press, a filtered liquid tank and a water supply system, wherein the dilute acid is produced when smelting flue gas is cooled and purified in the purification circulating tank, the dilute acid is neutralized with lime milk in the sedimentation tank and then subject to sedimentation, then the dilute acid is subject to filter pressing in the filter press to form a filter cake, and filtered liquid obtained by filter pressing in the filter press enters the filtered liquid tank; the anti-corrosive tower-free water supply system is additionally arranged behind the filtered liquid tank and used for enabling the filtered liquid after filter pressing to return into the purification circulating tank. The system for reusing the purified dilute acid, provided by the invention, can fully recycle the dilute acid after purification treatment, reduce the waste of resources and increase economic benefits of an enterprise.

Description

technical field [0001] The invention relates to the field of nonferrous metallurgy, in particular to a system for purifying dilute acid for reuse. Background technique [0002] In the field of non-ferrous metallurgy, dilute acid is produced when smelting flue gas is cooled and purified. The traditional method is to sulfide and remove impurities of this part of the dilute acid, neutralize it with lime milk to meet the emission standard, and discharge it. [0003] figure 1 It is the dilute acid treatment process in the purification section in the prior art. When the smelting flue gas is cooled and purified in the purification circulation tank, dilute acid is produced. The dilute acid settles after being neutralized with milk of lime in the settling tank, and then enters the filter press The medium pressure filter forms a filter cake, and the filtrate filtered out of the filter press is discharged through the filter liquid tank. [0004] During the normal production of the pu...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/66C02F103/18
Inventor 不公告发明人
Owner 岷山环能高科股份公司
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