Pretreatment device applied to electroplating wastewater treatment equipment

Abstract

The invention discloses a pretreatment device applied to electroplating wastewater treatment equipment. The device comprises a wastewater discharging pipeline and a resin softening device, wherein through holes are formed in the two sides of the resin softening device, and the resin softening device is fixedly connected with liquid guide pipes through the through holes; the resin softening deviceis connected with a high-recovery-rate membrane device through the liquid guide pipe on the right side of the resin softening device in a penetrating manner; the resin softening device is connected with an auxiliary device in a penetrating mode through the liquid guide pipe on the left side of the resin softening device; the surface of the liquid guide pipe penetrates through the right side of a shell and is fixedly connected with the shell; and the surface of the wastewater discharging pipeline penetrates through the left side of the shell and is fixedly connected with the shell. According tothe invention, the above structures are used in cooperation so as to overcome the following problems in actual use: due to the fact that NaOH and NaHCO3 are difficult to achieve automatic and uniformfeeding through a control valve, pretreatment of wastewater is not accurate enough; and since mixing of wastewater, NaOH and NaHCO3 is not sufficient enough, inconvenience is brought to use, and workefficiency is reduced.

Description

technical field [0001] The invention relates to the technical field of electroplating wastewater treatment, in particular to a pretreatment device used in electroplating wastewater treatment equipment. Background technique [0002] The sources of electroplating wastewater are generally: plating piece cleaning water, waste electroplating solution and other wastewater, which include water for flushing the floor of the workshop, water for washing plates, condensed water for ventilation equipment, and " Running, bubbling, dripping, and leaking" various baths and drainage, the existing electroplating wastewater treatment projects, almost no real zero-discharge treatment, the process route generally adopts the route of "pretreatment→membrane treatment→evaporative concentration treatment" . In the process of treatment, the removal of hardness in wastewater is not paid attention to, resulting in a high risk of fouling in the membrane treatment system and evaporation concentration s...

AI Technical Summary

Problems solved by technology

[0003] However, in actual use, because the control valve is difficult to achieve automatic and uniform delivery of NaOH and NaHCO3, the pretreatment of wastewater is not accurate enough, and the mixing between wastewater and NaOH and NaHCO3 is not sufficient, which brings inconvenience to use and reduces work efficiency

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