A kind of HF residue recovery device and using method of pickling equipment

Abstract

The invention provides a HF residue recovery device for pickling equipment and its use method, which is characterized in that it includes the main line part of the main recovery device and the accessory part of the recovery device, and the main line part of the recovery device is the pipeline in front of the pump through the lower tank of T1 Connect the process pump, and the process pump is respectively connected to the acid storage room and the waste water station; the accessories of the recovery device start from the nozzle in the pipeline in front of the pump, and connect the manual valve A, the pneumatic valve A, the diaphragm pump, the pneumatic valve B, and the manual valve in sequence B and acid storage tank; the pipeline in front of the pump is provided with a three-way pipeline, and the three-way pipeline is connected to the lower tank of T1, the input end of the process pump and the diaphragm pump respectively, and the two ends of the diaphragm pump are respectively connected to pneumatic Valve A, pneumatic valve B and manual valve A and manual valve B. In the field of invention related to pickling equipment technology, there is a problem that the magnetic pump in process pickling cannot completely recover HF, and a device that can better recover HF in the raffinate is proposed.

Description

technical field [0001] The invention relates to the technical field of pickling equipment, in particular to a device for recovering HF residual liquid of pickling equipment and a method for using it. Background technique [0002] After the pickling process is completed, the magnetic pump stops running when it recovers HF to the position of the low liquid level sensor. In order to protect the pump head, the HF in the lower tank of the equipment and the pipeline is not completely recovered, and is directly discharged to the waste water station for treatment, resulting in a waste of HF and As a result, the concentration of the wastewater station exceeds the standard and cannot normally meet the production needs. US Patent CN106957210B discloses a method for dehydrochlorination. The process comprises contacting RfCHClCH2Cl with a carbon catalyst in a reaction zone to produce a product mixture comprising RfCCl=CH2, wherein Rf is a perfluoroalkyl group, and wherein the temperatur...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem that the magnetic pump in the process pickling in the prior art cannot fully reclaim HF, a kind of HF raffinate recovery device of pickling equipment is proposed, including the main line part of the main recovery device and the accessory part of the recovery device, the recovery device The main line part is the lower tank of T1 connected to the process pump through the pipeline in front of the pump, and the process pump is respectively connected to the acid storage room and the waste water station; the accessories part of the recovery device starts from the nozzle in the pipeline in front of the pump, and is connected to manual valve A and pneumatic valve A in sequence , diaphragm pump, pneumatic valve B, manual valve B and acid storage chamber; the pipeline in front of the pump is provided with a three-way pipeline, and the three-way pipeline is connected to the lower tank of T1, the input end of the process pump and the diaphragm pump respectively. The two ends of the diaphragm pump are respectively connected with a pneumatic valve A, a pneumatic valve B, a manual valve A and a manual valve B, and the pneumatic valve A and the pneumatic valve B are respectively arranged between the diaphragm pump and the manual valve A and the manual valve B. The output end of the process pump is connected to the waste water station and the acid storage room, and a pneumatic valve C is provided between the output end of the process pump and the acid storage room; a limit sensor is provided on the process pump

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