Electroplating comprehensive wastewater intelligent treatment device and its control method

Abstract

The invention relates to an intelligent control technology for electroplating synthetical wastewater, wherein through the steps of pH regulation of wastewater, oxidation, reduction, Cr<6+> filtering, heavy metal capture, settling of suspended solids, ion exchange and sludge treatment, the intelligent synthetical treatment of electroplating wastewater is realized, and the technology has the characteristics of high automation degree and good treatment effect. In the invention, the treatment process is finished by a sequencing bath method in a reactor, two or more reactors alternate to realize timely accurate dosing in the wastewater treatment process as well as real-time detection and control before discharge, the stability, reliability and economy of the wastewater treatment quality are guaranteed, and the wastewater treatment stably meets the requirements of the Discharge Standard for Electroplating Pollutants (GB21900-2008); furthermore, the intelligent unmanned operation can accurately control the wastewater treatment time, the drug adding amount and the wastewater treatment quality, so that the volume of the wastewater treatment equipment is reduced, and the treatment cost is lowered.

Description

technical field

[0001] The invention relates to an intelligent wastewater treatment device and a control method thereof, in particular to a batch-sequential treatment device for electroplating wastewater and a control method thereof. Background technique

[0002] Electroplating comprehensive wastewater is the terminal wastewater collected after various treatments of electroplating wastewater, so it must be strictly treated before it can be discharged. According to the requirements of the clean production law, while achieving the standard treatment of electroplating wastewater, it is necessary to effectively recover the heavy metals and recycle the wastewater. Therefore, various enterprises have begun to use resource-based treatment methods such as water separation and treatment, water recovery, and heavy metal recovery to treat wastewater, but no matter what the method is, comprehensive wastewater will be generated, because even for enterprises that carry out strict water se...

Examples

Embodiment 1

[0045] This example provides a treatment method for generating 150 cubic meters of comprehensive electroplating wastewater every day. 1. The composition of wastewater is as follows:

[0046] Table 1

[0047]

[0048] Note*: Cr is total chromium--Cr 6+ with Cr 3+ Sum.

[0049] 2. Flow / velocity

[0050] Peak flow Q P =15m 3 / h time T P = 4h

[0051] Average flow Q 0 =7.5m 3 / h time T 0 =20h

[0052] 3. Discharge standard after wastewater treatment:

[0053] Table 2

[0054]

[0055] Note*: Cr is total chromium--Cr 6+ with Cr 3+ Sum.

[0056] The system equipment is composed as follows: figure 1 shown

[0057] 1. Waste water collection system: composed of 8.01 tank, ultrasonic level gauge C01, PP centrifugal pump 6.01, electromagnetic flowmeter LM1 and UPVC pipe valve.

[0058] Q P =10m 3 / h T p =4h batch processing time=4h batch processing volume=15×2m 3 (2 reactors, each effective volume = 15m 3 ) = 30m 3 Q t =30÷4=7.5m 3 / h

[0059] Effective...

Embodiment 2

[0094] The comprehensive electroplating wastewater treatment method that produces 300 cubic meters of electroplating every day provided by this embodiment.

[0095] 1. The composition of wastewater is as follows:

[0096] Table 1

[0097]

[0098] Note*: Cr is total chromium--Cr 6+ with Cr 3+ Sum.

[0099] 2. Flow / velocity

[0100] Peak flow Q P =25m 3 / h time T P =6h

[0101] Average flow Q 0 =15m 3 / h time T 0 =20h

[0102] 3. Discharge standard after wastewater treatment:

[0103] Table 2

[0104]

[0105] Note*: Cr is total chromium--Cr 6+ with Cr 3+ Sum.

[0106] The system equipment is composed as follows:

[0107] 1. Waste water collection system: composed of 8.01 tank, ultrasonic level gauge C01, PP centrifugal pump 6.01, electromagnetic flowmeter LM1 and UPVC pipe valve.

[0108] Q P =25m 3 / h T p =6h Reaction tank batch processing time=4h Batch processing capacity=30×2m 3 (2 reactors, each effective volume = 30m 3 ) = 60m 3 Q t =60÷4=1...

technical field

[0001] The invention relates to an intelligent wastewater treatment device and a control method thereof, in particular to a batch-sequential treatment device for electroplating wastewater and a control method thereof. Background technique

[0002] Electroplating comprehensive wastewater is the terminal wastewater collected after various treatments of electroplating wastewater, so it must be strictly treated before it can be discharged. According to the requirements of the clean production law, while achieving the standard treatment of electroplating wastewater, it is necessary to effectively recover the heavy metals and recycle the wastewater. Therefore, various enterprises have begun to use resource-based treatment methods such as water separation and treatment, water recovery, and heavy metal recovery to treat wastewater, but no matter what the method is, comprehensive wastewater will be generated, because even for enterprises that carry out strict water se...

Examples

Embodiment 1

[0045] This example provides a treatment method for generating 150 cubic meters of comprehensive electroplating wastewater every day. 1. The composition of wastewater is as follows:

[0046] Table 1

[0047]

[0048] Note*: Cr is total chromium--Cr 6+ with Cr 3+ Sum.

[0049] 2. Flow / velocity

[0050] Peak flow Q P =15m 3 / h time T P = 4h

[0051] Average flow Q 0 =7.5m 3 / h time T 0 =20h

[0052] 3. Discharge standard after wastewater treatment:

[0053] Table 2

[0054]

[0055] Note*: Cr is total chromium--Cr 6+ with Cr 3+ Sum.

[0056] The system equipment is composed as follows: figure 1 shown

[0057] 1. Waste water collection system: composed of 8.01 tank, ultrasonic level gauge C01, PP centrifugal pump 6.01, electromagnetic flowmeter LM1 and UPVC pipe valve.

[0058] Q P =10m 3 / h T p =4h batch processing time=4h batch processing volume=15×2m 3 (2 reactors, each effective volume = 15m 3 ) = 30m 3 Q t =30÷4=7.5m 3 / h

[0059] Effective...

Embodiment 2

[0094] The comprehensive electroplating wastewater treatment method that produces 300 cubic meters of electroplating every day provided by this embodiment.

[0095] 1. The composition of wastewater is as follows:

[0096] Table 1

[0097]

[0098] Note*: Cr is total chromium--Cr 6+ with Cr 3+ Sum.

[0099] 2. Flow / velocity

[0100] Peak flow Q P =25m 3 / h time T P =6h

[0101] Average flow Q 0 =15m 3 / h time T 0 =20h

[0102] 3. Discharge standard after wastewater treatment:

[0103] Table 2

[0104]

[0105] Note*: Cr is total chromium--Cr 6+ with Cr 3+ Sum.

[0106] The system equipment is composed as follows:

[0107] 1. Waste water collection system: composed of 8.01 tank, ultrasonic level gauge C01, PP centrifugal pump 6.01, electromagnetic flowmeter LM1 and UPVC pipe valve.

[0108] Q P =25m 3 / h T p =6h Reaction tank batch processing time=4h Batch processing capacity=30×2m 3 (2 reactors, each effective volume = 30m 3 ) = 60m 3 Q t =60÷4=1...

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