Acid washing waste liquid treatment method for recycling and rust removal of hardware

A technology for pickling waste liquid and treatment methods, applied in multi-stage water treatment, chemical instruments and methods, neutralized water/sewage treatment, etc., can solve problems such as poor treatment effect and complicated pickling liquid treatment process, and achieve Improve processing efficiency and quality, improve processing effect, and save cost

Inactive Publication Date: 2018-08-10
淮北达驰电气科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Hardware is obtained through mechanical processing. Hardware is widely used in daily life. Hardware can be recycled and reused, which is of great significance to sustainable development. During the recycling process of hardware, pickling is often used The pickling solution is used to derust the surface of the hardware. The main component of the pickling solution is dilute hydrochloric acid. However, there is a lack of a treatment method for pickling waste liquid used in hardware recycling and derusting to solve the above problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for treating pickling waste liquid for recycling and derusting metal parts provided by the invention specifically includes the following production steps:

[0023] S1: dosing and precipitation, first add flocculant to the waste liquid in the waste liquid reaction tank, during the adding process, turn on the stirring motor, the motor speed is 1100-1200 rpm, stir the mixed liquid inside the reaction tank, Accelerate the reaction speed and proceed to the next step;

[0024] S2: Sludge treatment, treating the sediment settled after adding medicine in step S1, transporting the sludge to the sludge recovery tank through the sludge pump, and drying the sludge;

[0025] S3: Dosing and neutralization. After the sludge is treated in step S2, dosing and neutralization treatment, start the mixer, use sodium hydroxide as the neutralizer, and add the sodium hydroxide solution quantitatively into the reaction tank with the waste acid by the electric membrane pump. Mix, enter...

Embodiment 2

[0038] A method for treating pickling waste liquid for recycling and derusting metal parts provided by the invention specifically includes the following production steps:

[0039] S1: dosing and precipitation, first add flocculant to the waste liquid in the waste liquid reaction tank, during the adding process, turn on the stirring motor, the motor speed is 1100-1200 rpm, stir the mixed liquid inside the reaction tank, Accelerate the reaction speed and proceed to the next step;

[0040] S2: Sludge treatment, treating the sediment settled after adding medicine in step S1, transporting the sludge to the sludge recovery tank through the sludge pump, and drying the sludge;

[0041] S3: Dosing and neutralization. After the sludge is treated in step S2, dosing and neutralization treatment, start the mixer, use sodium hydroxide as the neutralizer, and add the sodium hydroxide solution quantitatively into the reaction tank with the waste acid by the electric membrane pump. Mix, enter...

Embodiment 3

[0054] A method for treating pickling waste liquid for recycling and derusting metal parts provided by the invention specifically includes the following production steps:

[0055] S1: dosing and precipitation, first add flocculant to the waste liquid in the waste liquid reaction tank, during the adding process, turn on the stirring motor, the motor speed is 1100-1200 rpm, stir the mixed liquid inside the reaction tank, Accelerate the reaction speed and proceed to the next step;

[0056] S2: Sludge treatment, treating the sediment settled after adding medicine in step S1, transporting the sludge to the sludge recovery tank through the sludge pump, and drying the sludge;

[0057] S3: Dosing and neutralization. After the sludge is treated in step S2, dosing and neutralization treatment, start the mixer, use sodium hydroxide as the neutralizer, and add the sodium hydroxide solution quantitatively into the reaction tank with the waste acid by the electric membrane pump. Mix, enter...

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PUM

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Abstract

The invention discloses an acid washing waste liquid treatment method for recycling and rust removal of hardware. A traditional acid washing waste liquid treatment method is changed and the waste liquid treatment effect is greatly improved through two times of dosing and deposition and two times of dosing and neutralization treatment; the proportion of each component and the reaction temperature are strictly controlled; a water bath heating manner is adopted and the water temperature is easy to control, so that a temperature environment for preparation is ensured; the components are added while stirring and the treatment efficiency is improved; after waste liquid is treated to reach standards, the waste liquid is discharged, so that a water resource is prevented from being polluted; compared with a traditional technology, the method is improved and the treatment efficiency and the treatment quality are greatly improved; sludge is heated by utilizing an air heater and a resistance heating wire so that the sludge is dried and caked and the caked sludge is collected; environment protection requirements are combined and a flocculation medicine solution and a sodium hydroxide solution are made; a preparation technology is simple and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of hardware recycling, and more specifically relates to a method for treating waste pickling liquid used for recycling and rust removal of hardware. Background technique [0002] Hardware is obtained through mechanical processing. Hardware is widely used in daily life. Hardware can be recycled and reused, which is of great significance to sustainable development. In the process of recycling hardware, pickling is often used The pickling solution is used to derust the surface of the hardware. The main component of the pickling solution is dilute hydrochloric acid. The limitation of existing, lacks a kind of hardware reclaiming derusting to solve the above-mentioned problem with pickling waste liquid processing method. Contents of the invention [0003] The purpose of the present invention is to solve the shortcomings in the prior art, and propose a method for treating waste pickling liquid for metal recycli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F11/12
CPCC02F9/00C02F1/52C02F1/66C02F1/74C02F11/12C02F2301/08
Inventor 刘永飞马敏
Owner 淮北达驰电气科技有限公司
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