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PCB (printed circuit board) ink wastewater treatment method and system thereof

A technology of ink waste water and treatment system, applied in water/sewage treatment, water treatment parameter control, neutralization water/sewage treatment, etc., can solve the problems of high labor intensity, difficult process control, cumbersome cleaning process of treatment process, etc. The effect of reducing labor intensity and improving processing efficiency

Active Publication Date: 2016-03-30
GUANGDONG SHUIQING ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned technical problems, one of the purposes of the present invention is to provide a method for treating PCB ink wastewater, which solves the problems of cumbersome cleaning process and high labor intensity in the traditional treatment process
[0005] Another object of the present invention is to provide a PCB ink wastewater treatment system to solve the problems that the existing system has poor treatment effect and the process is difficult to control

Method used

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  • PCB (printed circuit board) ink wastewater treatment method and system thereof

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Effect test

Embodiment 1

[0021] Such as figure 1 As shown, a PCB ink wastewater treatment system includes a regulating tank 1 , a polymerization reaction tank 2 , an acidification reaction tank 3 , a neutralization reaction tank 4 , a flocculation reaction tank 5 and a sedimentation tank 6 .

[0022] Among them, the regulating pool 1 receives the ink waste water flowing out from the PCB workshop, and is used to regulate the water quality and quantity. In order to prevent the precipitation of pollutants in the waste water, a stirring and mixing device 10 is also provided inside it.

[0023] A lift pump 7 is provided between the adjustment tank 1 and the polymerization reaction tank 2 , and the lift pump 7 is used to transport the sewage to the polymerization reaction tank 2 .

[0024] The polymerization reaction tank 2 is used to suppress the precipitation of scum after acid addition, and its upper part is provided with a feeding port for adding polyferric sulfate, and a stirring and mixing device 10 ...

Embodiment 2

[0030] A method for treating PCB ink waste water, using the PCB ink waste water treatment system described in embodiment 1, which comprises the steps:

[0031] First, adjust the water quality and quantity of the wastewater flowing from the PCB workshop through the regulating pool;

[0032] Next, add polyferric sulfate to the PCB ink wastewater in the polymerization tank, the amount of which is 500-1000 mg / L, and stir and react rapidly for 5 minutes.

[0033] Next, sulfuric acid was added into the acidification reaction tank to control the pH at 3-3.5, and the reaction was fully stirred and mixed for 10 minutes.

[0034] Then, sodium hydroxide was added into the neutralization reaction tank to control the pH at 6.5-9.0, and the mixture was fully stirred and reacted for 5 minutes.

[0035] Next, add polyacrylamide into the flocculation reaction tank, the input amount is 5-10 mg / L, and fully stir and mix for 15 minutes.

[0036] Finally, in the settling tank, the sediment in th...

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Abstract

The invention provides a PCB (printed circuit board) ink wastewater treatment method which comprises five major steps including polymerization, acidification, neutralization, flocculation and precipitation. The invention also discloses a PCB ink wastewater treatment system which comprises an adjusting tank and a polymerization reaction tank, an acidification reaction tank, a neutralization reaction tank, a flocculation reaction tank and a precipitation tank which are sequentially arranged at the back of the adjusting tank, wherein the adjusting tank is used for receiving ink wastewater and adjusting the water quality and water quantity; the polymerization reaction tank is used for inhibiting dross separation after acidification; the acidification reaction tank is used for controlling the pH change in an acid precipitation process; the neutralization reaction tank is used for adjusting the pH change in a neutralization process; and the flocculation reaction tank is used for adding a flocculant. According to the method and system provided by the invention, since polymeric ferric sulfate is added before acid precipitation reaction, the PCB ink wastewater does not emerge from the water or suspend in water after acidification reaction but totally precipitates; the precipitation of pollutants can be accelerated through naturalization reaction and flocculation reaction; and the pollutants are removed through the dewatering of a sludge dewatering machine. By adopting the method and system provided by the invention, the labor intensity is greatly reduced, the treatment efficiency is improved, and the COD removal efficiency can more than or equal to 80%.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a PCB ink wastewater treatment method and a system thereof. Background technique [0002] Printed Circuit Board (PCB) wastewater can generally be divided into cleaning wastewater, ink wastewater, complex wastewater, concentrated acid wastewater, concentrated alkali wastewater and other wastewater types according to the main pollutants. The main source of ink wastewater is In the production process of circuit boards, screen printing, development, film stripping and other processes. PCB ink wastewater is a kind of high-concentration organic wastewater, its CODcr is usually 5000-10000mg / L, some can be as high as 20000mg / L, SS is about 800-1200mg / L, PH value is generally alkaline, and the color of wastewater is dark blue Color, this type of wastewater accounts for about 5% of the total volume of PCB wastewater. For PCB wastewater treatment, the key to whether CODcr can rea...

Claims

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Application Information

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IPC IPC(8): C02F9/04
CPCC02F1/5236C02F1/56C02F1/66C02F9/00C02F2209/06
Inventor 赖日坤林国宁张建华罗小龙何耀武梁康祜
Owner GUANGDONG SHUIQING ENVIRONMENTAL PROTECTION TECH CO LTD
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