CN106977023A - A kind of processing method of mechanical processing industry cutting waste fluid - Google Patents

A kind of processing method of mechanical processing industry cutting waste fluid Download PDF

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Publication number
CN106977023A
CN106977023A CN201710271439.1A CN201710271439A CN106977023A CN 106977023 A CN106977023 A CN 106977023A CN 201710271439 A CN201710271439 A CN 201710271439A CN 106977023 A CN106977023 A CN 106977023A
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CN
China
Prior art keywords
cutting waste
waste fluid
pumped
demulsification
processing method
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Pending
Application number
CN201710271439.1A
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Chinese (zh)
Inventor
郑育毅
黄腾蛟
刘常青
吴春山
刘文伟
孙启元
李家兵
谢蓉蓉
汪清环
郭绍英
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Fujian Normal University
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Fujian Normal University
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Publication date
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Priority to CN201710271439.1A priority Critical patent/CN106977023A/en
Publication of CN106977023A publication Critical patent/CN106977023A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/46109—Electrodes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/722—Oxidation by peroxides
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

The present invention relates to a kind of processing method of mechanical processing industry cutting waste fluid.Treatment method is that pending cutting waste fluid is pumped into alkali analysis demulsification pond, flows into sloping plate oil separation tank progress oil removal processing naturally after alkali analysis demulsification, is then pumped into sedimentation basin, while plus aluminium polychloride coagulating 15min, remove sediment after standing；Waste liquid salt acid for adjusting pH to 4~5 after sediment will be removed, " iron filings-charcoal " post is pumped into after acid adjustment, 15~20min of residence time is pumped into the oxidation pond of hydrogen peroxide, air is filled with and carries out seething stirring；Dosing reactive tank, hydrogenation calcium oxide and aluminium polychloride stirring reaction 40min are then pumped into, is precipitated again into sedimentation basin afterwards；Most adsorbed afterwards through activated carbon adsorption bed, Chinese effluent after absorption.The cutting waste fluid of the inventive method processing, COD reduces more than 95%, can reach national standard three-level discharge index limit value.

Description

A kind of processing method of mechanical processing industry cutting waste fluid
Technical field
The present invention relates to the processing method of mechanical processing industry cutting waste fluid, and in particular to oil-containing, containing heavy metal, Yi Jigao A kind of processing method of mechanical processing industry cutting waste fluid of concentration organic contamination.
Background technology
Cutting fluid is widely used in mechanical processing process, and lubrication is played a part of to machinery, effectively reduction machining Caused heating, the service life of prolonged mechanical prevents deformation, played an important roll to machinery.However, its cutting produced is given up Liquid but brings an extremely serious difficulty to sewage disposal.Cutting fluid can be divided into the aqueous solution, emulsion and the oily three major types of cutting.
Cutting waste fluid is a kind of high pollution waste water of extremely difficult processing, is usually to deliver to have in the form of hazardous waste The unit commission disposal of hazardous waste processing qualification, disposal costs are very high.And disposal process typically uses biochemical processing process, Organic concentration and colourity after processing are extremely difficult to environmental requirement.Especially cutting fluid usually introduces a large amount of indissolubles, difficult sedimentation Subparticle, these bring sizable difficulty to biochemical treatment, thus biochemical treatment process COD with chroma removal rate very It is low.
The present invention makes full use of the waste material of original process, and the treatment of wastes with processes of wastes against one another solves cutting waste fluid processing difficult Degree is big, the problem of processing cost is high.
The content of the invention
The purpose of the present invention improves cutting waste fluid processing to overcome problem present on current cutting waste fluid treatment technology There is provided economic, the efficient cutting waste fluid processing method of one kind for effect.
The step for the treatment of method, is as follows：
1. pending cutting waste fluid is pumped into alkali analysis demulsification pond, carries out 20~30min alkali analysis demulsification.
Described alkali analysis demulsification uses blade stirring.Mass concentration is used during alkali analysis demulsification for 5% NaOH, alkali analysis pH models Enclose for 8~9.
2. oil removing in sloping plate oil separation tank is flowed into naturally after alkali analysis demulsification.
3. handled through oil removal, sedimentation basin is pumped into certain flow, while adding aluminium polychloride (PAC) coagulating 15min, staticly settles and sediment is removed after 60min.
Described aluminium polychloride (PAC), its dosage is that every cubic metre of cutting waste fluid adds 1~2Kg.
4. waste liquid salt acid for adjusting pH to 4~5 after sediment will be removed, Fe-C micro electrolysis reaction column is pumped into after acid adjustment, will be given up Liquid residence time (HRT) 15~20min in post.The waste liquid of Fe-C micro electrolysis reaction column outflow is pumped into hydrogen peroxide oxidation pond, together When hydrogen peroxide oxidation bottom of pond portion be filled with air and carry out seething 45~60min of stirring, improve catalytic oxidation effect, realize that Fenton is senior Oxidation processes.
Described hydrogen peroxide, its dosage is that every cubic metre of cutting waste fluid adds 10~20L.
5. dosing reactive tank is pumped into after the water outlet of hydrogen peroxide oxidation pond, adds calcium hydroxide (Ca (OH)2) and aluminium polychloride (PAC) the stirring reaction 40min in reactive tank, is precipitated again into sedimentation basin afterwards.
Described calcium hydroxide, its dosage is that every cubic metre of cutting waste fluid adds 200~300g.
Described aluminium polychloride, its dosage is that every cubic metre of cutting waste fluid adds 400~500g.
6. precipitated in sedimentation basin through 60min, be pumped into activated carbon adsorption bed and adsorbed, Chinese effluent after absorption.
Alkali of the present invention analysis demulsification pond, sloping plate oil separation tank, sedimentation basin, Fe-C micro electrolysis reaction column, dosing reactive tank, Oxidation pond and activated carbon adsorption bed are the general processing structures or process equipment of sewage treatment industry.
The cutting waste fluid handled using the inventive method, is reduced more than 95% before COD is more untreated, can reach《Sewage Comprehensive discharge standard》(GB8978-1996) the three-level discharge index limit value of table 4 in.
Brief description of the drawings
Fig. 1 is the process flow figure of cutting waste fluid of the present invention.
Embodiment
Embodiment 1
50 liters of pending cutting waste fluid is taken, it is 9650mg/L to determine initial COD.
1. pending cutting waste fluid is pumped into alkali analysis demulsification pond, the alkali analysis demulsification through 20min.Described alkali analysis demulsification is adopted Use blade stirring.Use mass concentration for 5% NaOH during alkali analysis demulsification, alkali analysis pH scopes are 8.
2. oil removing in sloping plate oil separation tank is flowed into naturally after alkali analysis demulsification.
3. handled through oil removal, be pumped into sedimentation basin, while adding aluminium polychloride (PAC) 50g coagulating 15min, stood Sediment is removed after precipitation 60min.
4. waste liquid salt acid for adjusting pH to 4~5 after sediment will be removed, Fe-C micro electrolysis reaction column is pumped into after acid adjustment, will be given up Liquid residence time (HRT) 15min in post.The waste liquid of Fe-C micro electrolysis reaction column outflow is pumped into hydrogen peroxide oxidation pond, while double Oxygen water oxygen bottom of pond portion is filled with air and carries out seething stirring 50min, realizes that Fenton advanced oxidation is handled.Dioxygen in oxidation pond Water, its dosage is 1L.
5. dosing reactive tank is pumped into after the water outlet of hydrogen peroxide oxidation pond, adds calcium hydroxide (Ca (OH)2) and aluminium polychloride (PAC) the stirring reaction 40min in reactive tank, is precipitated again into sedimentation basin afterwards.
Described calcium hydroxide, its dosage is to add 10g per 50L cutting waste fluids.
Described aluminium polychloride, its dosage is to add 20g per 50L cutting waste fluids.
6. after cutting waste fluid is precipitated in sedimentation basin through 60min, it is pumped into activated carbon adsorption bed and is adsorbed, water outlet after absorption Discharge.After measured, the cutting waste fluid handled by the above method, COD is 368mg/L, reduces 96.2%, is reached《Sewage is comprehensive Close discharge standard》(GB8978-1996) the three-level discharge index limit value of table 4 in.
The cutting waste fluid of the present embodiment, is derived from Foochow six and Machinery Co., Ltd..
Embodiment 2
50 liters of pending cutting waste fluid is taken, it is 14650mg/L to determine initial COD.
1. pending cutting waste fluid is pumped into alkali analysis demulsification pond, the alkali analysis demulsification through 25min.Described alkali analysis demulsification is adopted Use blade stirring.Use mass concentration for 5% NaOH during alkali analysis demulsification, alkali analysis pH is 8.5.
2. oil removing in sloping plate oil separation tank is flowed into naturally after alkali analysis demulsification.
3. handled through oil removal, be pumped into sedimentation basin, while adding aluminium polychloride (PAC) 100g coagulating 15min, stood Sediment is removed after precipitation 60min.
4. waste liquid salt acid for adjusting pH to 4~5 after sediment will be removed, Fe-C micro electrolysis reaction column is pumped into after acid adjustment, will be given up Liquid residence time (HRT) 20min in post.The waste liquid of Fe-C micro electrolysis reaction column outflow is pumped into the oxidation pond of hydrogen peroxide, simultaneously Hydrogen peroxide oxidation bottom of pond portion is filled with air and carries out seething stirring 50min, realizes that Fenton advanced oxidation is handled.Dioxygen in oxidation pond Water, its dosage is 2L.
5. dosing reactive tank is pumped into after the water outlet of hydrogen peroxide oxidation pond, adds calcium hydroxide (Ca (OH)2) and aluminium polychloride (PAC) the stirring reaction 40min in reactive tank, is precipitated again into sedimentation basin afterwards.
Described calcium hydroxide, its dosage is to add 12g per 50L cutting waste fluids.
Described aluminium polychloride, its dosage is to add 20g per 50L cutting waste fluids.
6. after cutting waste fluid is precipitated in sedimentation basin through 60min, it is pumped into activated carbon adsorption bed and is adsorbed, water outlet after absorption Discharge.After measured, the cutting waste fluid handled by the above method, COD is 398mg/L, reduces 97.3%, is reached《Sewage is comprehensive Close discharge standard》(GB8978-1996) the three-level discharge index limit value of table 4 in.
The cutting waste fluid of the present embodiment, is derived from Foochow six and Machinery Co., Ltd..
Embodiment 3
50 liters of pending cutting waste fluid is taken, it is 18600mg/L to determine initial COD.
1. pending cutting waste fluid is pumped into alkali analysis demulsification pond, the alkali analysis demulsification through 30min.Described alkali analysis demulsification is adopted Use blade stirring.Use mass concentration for 5% NaOH during alkali analysis demulsification, alkali analysis pH is 9.
2. oil removing in sloping plate oil separation tank is flowed into naturally after alkali analysis demulsification.
3. handled through oil removal, be pumped into sedimentation basin, while adding aluminium polychloride (PAC) 100g coagulating 15min, stood Sediment is removed after precipitation 60min.
4. waste liquid salt acid for adjusting pH to 4~5 after sediment will be removed, Fe-C micro electrolysis reaction column is pumped into after acid adjustment, will be given up Liquid residence time (HRT) 20min in post.The waste liquid of Fe-C micro electrolysis reaction column outflow is pumped into the oxidation pond of hydrogen peroxide, simultaneously Hydrogen peroxide oxidation bottom of pond portion is filled with air and carries out seething stirring 60min, realizes that Fenton advanced oxidation is handled.Dioxygen in oxidation pond Water, its dosage is 3L.
5. dosing reactive tank is pumped into after the water outlet of hydrogen peroxide oxidation pond, adds calcium hydroxide (Ca (OH)2) and aluminium polychloride (PAC) the stirring reaction 40min in reactive tank, is precipitated again into sedimentation basin afterwards.
Described calcium hydroxide, its dosage is to add 12g per 50L cutting waste fluids.
Described aluminium polychloride, its dosage is to add 25g per 50L cutting waste fluids.
6. after cutting waste fluid is precipitated in sedimentation basin through 60min, it is pumped into activated carbon adsorption bed and is adsorbed, water outlet after absorption Discharge.After measured, the cutting waste fluid handled by the above method, COD is 482mg/L, reduces 97.4%, is reached《Sewage is comprehensive Close discharge standard》(GB8978-1996) the three-level discharge index limit value of table 4 in.
The cutting waste fluid of the present embodiment, is derived from Foochow six and Machinery Co., Ltd..

Claims (6)

1. a kind of processing method of mechanical processing industry cutting waste fluid, it is characterised in that：
1. pending cutting waste fluid is pumped into alkali analysis demulsification pond, carries out 20~30min alkali analysis demulsification；
2. oil removing in sloping plate oil separation tank is flowed into naturally after alkali analysis demulsification；
3. handled through oil removal, be pumped into sedimentation basin, while adding aluminium polychloride coagulating 15min, gone after staticly settling 60min Except sediment；
4. waste liquid salt acid for adjusting pH to 4~5 after sediment will be removed, Fe-C micro electrolysis reaction column is pumped into after acid adjustment, waste liquid exists 15~20min of residence time in post；The waste liquid of Fe-C micro electrolysis reaction column outflow is pumped into the oxidation pond of hydrogen peroxide, while hydrogen peroxide Oxidation pond bottom is filled with air and carries out seething 45~60min of stirring；
5. dosing reactive tank is pumped into after the water outlet of hydrogen peroxide oxidation pond, adds calcium hydroxide and aluminium polychloride and stirred in reactive tank 40min is reacted, is precipitated again into sedimentation basin afterwards；
6. precipitated in sedimentation basin through 60min, be pumped into activated carbon adsorption bed and adsorbed, Chinese effluent after absorption.
2. the processing method of a kind of mechanical processing industry cutting waste fluid according to claim 1, it is characterised in that described Alkali analysis demulsification uses blade stirring, uses mass concentration for 5% NaOH during alkali analysis demulsification, alkali analysis pH scopes are 8~9.
3. the processing method of a kind of mechanical processing industry cutting waste fluid according to claim 1, it is characterised in that described Aluminium polychloride, its dosage is that every cubic metre of cutting waste fluid adds 1~2Kg.
4. a kind of processing method of mechanical processing industry cutting waste fluid according to claim 1, it is characterised in that the institute The hydrogen peroxide stated, its dosage is that every cubic metre of cutting waste fluid adds 10~20L.
5. the processing method of a kind of mechanical processing industry cutting waste fluid according to claim 1, it is characterised in that described Calcium hydroxide, its dosage is that cubic meter cutting waste fluid adds 200~300g.
6. the processing method of a kind of mechanical processing industry cutting waste fluid according to claim 1, it is characterised in that described Aluminium polychloride, its dosage is that every cubic metre of cutting waste fluid adds 400~500g.
CN201710271439.1A 2017-04-24 2017-04-24 A kind of processing method of mechanical processing industry cutting waste fluid Pending CN106977023A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108101274A (en) * 2017-12-29 2018-06-01 上海丰信环保科技有限公司 A kind of oils high-COD waste water pretreating process and equipment
CN108516652A (en) * 2018-05-10 2018-09-11 巢湖市南特精密制造有限公司 A kind of processing method of Cutting Liquid Wastewater
CN109867395A (en) * 2019-03-13 2019-06-11 宁波协恒环保科技有限公司 A kind of cutting fluid integrated treatment unit and processing method
CN112897795A (en) * 2019-12-04 2021-06-04 梅雨 Environment-friendly treatment method for cutting fluid wastewater
CN114804434A (en) * 2022-05-12 2022-07-29 天津城建大学 Impurity removal treatment process suitable for organic matters in high-salt oily wastewater

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105016538A (en) * 2015-07-09 2015-11-04 杭州大地海洋环保有限公司 Treatment method for water-based cutting wastewater

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105016538A (en) * 2015-07-09 2015-11-04 杭州大地海洋环保有限公司 Treatment method for water-based cutting wastewater

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108101274A (en) * 2017-12-29 2018-06-01 上海丰信环保科技有限公司 A kind of oils high-COD waste water pretreating process and equipment
CN108516652A (en) * 2018-05-10 2018-09-11 巢湖市南特精密制造有限公司 A kind of processing method of Cutting Liquid Wastewater
CN109867395A (en) * 2019-03-13 2019-06-11 宁波协恒环保科技有限公司 A kind of cutting fluid integrated treatment unit and processing method
CN112897795A (en) * 2019-12-04 2021-06-04 梅雨 Environment-friendly treatment method for cutting fluid wastewater
CN114804434A (en) * 2022-05-12 2022-07-29 天津城建大学 Impurity removal treatment process suitable for organic matters in high-salt oily wastewater
CN114804434B (en) * 2022-05-12 2023-11-24 天津城建大学 Impurity removal treatment process applicable to organic matters in high-salt oily wastewater

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Application publication date: 20170725