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Method for processing organic wastewater for manufacturing circuit board using short distance distillation

A technology of organic wastewater and short-path distillation, which is applied in the field of environmental pollution control, can solve the problems of large fixed investment, secondary air pollution, and large floor space, and achieve the effects of reducing environmental pollution, reducing implementation costs, and avoiding secondary pollution.

Inactive Publication Date: 2009-11-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) Secondary air pollution is caused in a large area exposed to the atmosphere in the sewage treatment process, and it is not suitable for wastewater treatment in large and small cities
[0004] (2) A large amount of water is allocated during the treatment process, resulting in the consumption of a large amount of civil water
[0005] (3) Large fixed investment and large floor area
Although this method introduces the microwave treatment method into sewage treatment, which improves the sewage treatment efficiency to a certain extent, there are still problems such as a large area exposed to the atmosphere in the sewage treatment process, and a large amount of water is used.

Method used

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  • Method for processing organic wastewater for manufacturing circuit board using short distance distillation
  • Method for processing organic wastewater for manufacturing circuit board using short distance distillation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Weigh 20 liters of recycled organic waste water from the circuit board manufacturing industry, its COD concentration is 18000mg / L, Cu 2+ , Sn 2+ and Pb 2+ The concentration is 100mg / L; the organic wastewater from the circuit board manufacturing industry is directly sent to the buffer tank 1, and the metering pump is input to the first-stage short-range evaporator 2 for concentration and dehydration. The temperature is 60°C and the pressure is -0.6Mpa. Carry out the first concentration and dehydration, the weight of separated water is 9 liters, and its COD content is 80mg / L. After concentration and dehydration, the organic wastewater from the circuit board manufacturing industry continues to enter the next short-path distillation column for separation.

[0032] (2) The dehydrated organic waste water from the circuit board manufacturing industry is pumped into the second-stage short-path distillation column 3 to continue to concentrate and separate part of the water...

Embodiment 2

[0034] (1) 50 liters of organic wastewater from the circuit board manufacturing industry was recovered from a certain time, the COD concentration was 25000mg / L, Cu 2+ , Sn 2+ and Pb 2+ The concentration is 120mg / L. The organic waste water from the circuit board manufacturing industry is directly sent to the buffer tank 1, and the metering pump is input to the first-stage short-range evaporator 2 for concentration and dehydration, specifically at a temperature of 40°C and a pressure of -0.6Mpa. Carry out the first concentrated dehydration. The weight of the separated water is about 8 liters, and its COD content is 98mg / L.

[0035] (2) The dehydrated organic wastewater from the circuit board manufacturing industry is pumped into the second-stage short-path distillation column 3 to separate the middle part of the water, specifically at a temperature of 70°C and a pressure of -0.6Mpa. Concentrated and dehydrated. The weight of the separated water is about 20 liters, and its CO...

Embodiment 3

[0038] (1) Measure 50 liters of organic waste water recycled from the circuit board manufacturing industry, its COD concentration is 18000mg / L, Cu 2+ , Sn 2+ and Pb 2+The concentration is 120mg / L. The organic waste water from the circuit board manufacturing industry is directly sent to the buffer tank 1, and the metering pump is input to the first-stage short-range evaporator 2 for dehydration, specifically at a temperature of 80°C and a pressure of -0.3Mpa. Conditions for the first concentration dehydration. The weight of the separated water is about 9 liters, and its COD concentration is 96mg / L.

[0039] (2) After dehydration, the organic wastewater from the circuit board manufacturing industry is pumped into the second-stage short-path distillation column 3 to separate the middle part of the water, specifically at a temperature of 85°C and a pressure of -0.5Mpa. Carry out the second concentrated dehydration. The weight of the separated water is about 12 liters, and its ...

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Abstract

The present invention discloses a method for processing organic wastewater for manufacturing a circuit board using a short distance distillation, including at least two stages of concentrating and dewatering by a short distance evaporator, each stage distills water containing COD less than 100mg / L; the first stage of the distillation is that adding the organic wastewater for manufacturing the circuit board into a buffer vessel directly, then feeding into the short distance evaporator to concentrated and dewater, the second stage of the distillation is that feeding the organic wastewater after the concentrating and the dewatering into a second stage short distance column distiller to concentrate and dewater secondly, wherein a temperature is controlled from 60 to 130 DEG C, a pressure intensity is in a range from -0.6MPa-0.95MPa, then a high concentration fluid-like substance or cream-like substance will be obtained. By means of the invention, it is capable of processing the organic wastewater for the circuit board without chemical processes of pH value regulation, precipitating and filtrating, microwave reaction catalytic oxidation degradation and the like, the flow path is simple, and the distilled and separated water conforms a discharge standard.

Description

technical field [0001] The invention relates to the field of environmental pollution control, in particular to a method for treating organic wastewater in the circuit board manufacturing industry by using short-distance distillation. Specifically, it relates to a method for treating organic waste water of the circuit board manufacturing industry by using short-distance distillation technology to gradually separate water that meets the discharge standard (COD<100mg / L) and highly concentrated fluid or paste. Background technique [0002] At present, companies producing circuit boards are performing processes such as grinding, etching, electroplating, hole metallization, development, stripping, and organic ink on circuit boards. During this process, circuit board wastewater will be generated, and the COD concentration is generally 3000-20000mg / L. The existing technology adopts such as figure 1 The process shown in the process includes steps such as organic wastewater→comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F1/04
Inventor 朱宝璋刘松冯志豪
Owner SOUTH CHINA UNIV OF TECH
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