Extraction device and extraction method for phosphorus-containing waste acid
An extraction device and extraction technology, applied in chemical instruments and methods, extraction water/sewage treatment, water pollutants, etc., can solve problems such as control troubles, extraction liquid discharge, etc., and achieve the effect of preventing discharge
Active Publication Date: 2020-12-01
绍兴市九鑫环保有限公司
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Problems solved by technology
In the prior art, it is generally necessary to control the feed rate of waste acid and the discharge rate of raffinate through a flow valve. However, even if a flow valve is used, since the supply of waste acid is not continuous, if the waste acid stops feeding , and the raffinate is still being discharged, it may lead to the discharge of the extract, so it is necessary to quickly close the raffinate discharge pipeline when the waste acid is stopped, and it is more troublesome to control
Method used
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Embodiment 1
[0026] Embodiment 1, carry out extraction according to the following steps, 1, take extracting liquid and be that the mixture of 40% TBP and 60% 26# solvent oil by mass percentage is injected into the extracting liquid that forms 1m in the extracting separation tank through extracting liquid feeding pipe Column, 2. Feed phosphorus-containing waste acid through the feed nozzle, the waste acid droplets pass through the extract to extract and the raffinate sinks below the extract; 3. When the top of the extract rises to the position of the float, the float floats up Drive the spool up to make the raffinate discharge.
Embodiment 2
[0027]Embodiment 2, only difference with embodiment 1 is that the extract is the mixture of 70% TBP and 30% 26# solvent naphtha in mass percent.
Embodiment 3
[0028] Embodiment 3, the only difference with embodiment 1 is that the extract is 100% TPB.
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Abstract
The invention discloses an extraction device for phosphorus-containing waste acid. The extraction device comprises an extraction separation tank, wherein an extraction liquid feeding pipeline and an extraction liquid discharging pipeline are arranged on the extraction separation tank; a feeding spray head is arranged at the top of the extraction separation tank; a raffinate discharging valve is arranged at the bottom of the extraction separation tank and comprises a valve body, a valve element, a reset spring, a supporting rod and a floating ball; a flow channel with a contraction section is formed in the valve body; the valve element is arranged in the flow channel; the top of the valve element is connected with the supporting rod; the floating ball is arranged on the supporting rod; andthe reset spring is arranged between the valve body and the valve element. According to the invention, extraction liquid is fed through the extraction liquid feeding pipeline, the phosphorus-containing waste acid is fed through the feeding spray head, waste acid liquid drops penetrate through the extraction liquid and extraction is achieved, raffinate sinks to a position below the extraction liquid until the top of the extraction liquid rises to the floating ball to drive the valve element to rise, and the phosphorus-containing waste acid is kept to be fed synchronously with the raffinate. Byadopting the device and the method, continuous extraction can be carried out, almost no manual control is needed, and the extraction efficiency of the phosphorus-containing waste acid is effectively improved.
Description
technical field [0001] The invention belongs to the technical field of extraction equipment and extraction methods, in particular to an extraction device for phosphorus-containing waste acid and an extraction method thereof. Background technique [0002] According to the latest national list of hazardous wastes, phosphorus-containing waste acid in the aluminum surface treatment industry is a hazardous waste. In the production of aluminum surface treatment enterprises, a large amount of phosphating waste acid is often produced. Its main components include 10-40% phosphoric acid, 5-20% sulfuric acid, 1-5% aluminum ions and a small amount of heavy metal ions. In the traditional In the process of treating these phosphorus-containing waste acids, the most common method is the neutralization precipitation method. Calcium hydroxide or other precipitants are generally used to neutralize the precipitation, resulting in a huge waste of phosphorus resources, and a large amount of hazar...
Claims
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IPC IPC(8): C02F1/26C02F101/10
CPCC02F1/26C02F2101/105
Inventor 缪锡飞龚典局朱官强杨钧潮陈军明董光锋
Owner 绍兴市九鑫环保有限公司