Hydrofluoric acid recovering process
A hydrofluoric acid and process technology, applied in the direction of hydrogen fluoride, fluorine/hydrogen fluoride, etc., to achieve the effect of improving cleanliness, preventing secondary pollution, and avoiding manual cleaning and maintenance
Inactive Publication Date: 2018-02-23
深圳市纯水一号水处理科技有限公司
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Problems solved by technology
In the existing process technology, the solid-liquid separation of waste acid is carried out by using a bag filter or a plate and frame filter press. If this process technology operates normally, it can achieve the effect of preliminary treatment, but there are still many problems and hidden dangers.
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[0011] As shown in the figure, a hydrofluoric acid recovery process is characterized in that: the steps include: the workshop sends the hydrofluoric acid into the acid tank to be recovered, and the hydrofluoric acid in the acid tank to be recovered is transported to the acid tank through the acid booster pump. Solid-liquid separation in the filter press, after separation, it flows into the rectification tower for rectification, after rectification, it flows into the relay acid tank and then enters the tubular microfiltration membrane through the valve for secondary filtration through the first pneumatic pump, and the filtered waste liquid enters the waste The filtrate enters the recovery acid tank, and finally enters the workshop through the second pneumatic pump.
[0012] The driving air pressure required for the process must not be lower than 3.5bar.
[0013] The pneumatic pump is made of plastic material, which is resistant to acid and alkali corrosion. The connecting pipel...
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The invention relates to a hydrofluoric acid recovering process. The hydrofluoric acid recovering process is characterized by comprising the following steps: feeding hydrofluoric acid into a to-be-recovered acid barrel by a workshop; conveying the hydrofluoric acid in the to-be-recovered acid barrel into an acid filter press by an acid pressurizing pump to perform solid and liquid separation, flowing into a rectifying tower after separation to perform rectification, flowing into a relay acid barrel after rectification, entering a tubular micro-filtration membrane by a first pneumatic pump andthrough a valve to filter for the second time, enabling the waste liquid after filtering to enter a waste liquid pool, enabling the filtrate to enter a recovering acid barrel, and entering the workshop by a second pneumatic pump. The hydrofluoric acid recovering process has the following advantages: the cleanness of the recovered acid is improved obviously and effectively by changing the process design, and secondary pollution to subsequent equipment by particulate matters which cannot be seen by naked eyes is avoided. The system can operate continuously and stably and can judge whether a pre-positioned plate frame is leaked or not in time. Manual cleaning and maintenance of acid collecting equipment and acid using equipment can be avoided effectively.
Description
technical field [0001] The invention relates to the technical field of recovery of industrial production, in particular to a hydrofluoric acid recovery process. Background technique [0002] In industries that use HF, waste HF will inevitably be produced after HF use, with high or low concentration. These waste HF are hazardous wastes. If they are discharged directly, they will cause great pollution to the environment, and they are also prohibited by law. Allowed, if these waste acids are sent to the sewage treatment station for treatment, on the one hand, there will be corresponding treatment costs, and on the other hand, the waste residue generated by the waste acid treatment also needs to be treated twice. Therefore, a process is needed to recover this part of waste acid, which can not only recover expensive HF, but also greatly reduce the cost of waste acid treatment. In the existing process technology, the solid-liquid separation of waste acid is carried out by using a...
Claims
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Login to View More IPC IPC(8): C01B7/19
CPCC01B7/196
Inventor 罗智超杨成孙楚国尚东滨何垚余文余萌萌褚颖颖苏以慧王浩鲁志敏杨道俊
Owner 深圳市纯水一号水处理科技有限公司