Treatment of waste liquid of the hottest metal cut

2022-08-08
  • Detail

Treatment of metal cutting fluid waste liquid

today, we have always emphasized the long-term performance and recycling of metal cutting fluid. However, it is very important for users to remember that water-based metal cutting fluid has its own service life, and the expired metal cutting fluid will eventually be treated and disposed of. The selection of appropriate treatment and disposal methods depends on a series of parameters, including the capacity of the wastewater to be treated, the characteristics of the wastewater, and the corresponding local and national regulations

several cases also indicate that metal cutting fluid needs to be treated: excessive pollutants, putrid odor or filter failure. Although some standards are subjective, the discharge, cleaning and fluid change of many metal cutting fluids are determined by the fact that the metal cutting fluid itself is too greasy, dirty or has peculiar smell. However, more prudent decisions need to be based on tests, such as pH value, concentration, bacterial content, mold content, waste oil volume or other indicators that reflect the performance of metal cutting fluid

other projects may also affect business development, such as production, transportation, storage and wastewater treatment. It is very important that every wastewater treatment step should comply with local customs and regulations. In any case, the most effective treatment and disposal methods need to be considered to minimize the risk of late complications

most feasible wastewater treatment and disposal methods are based on various considerations, For example: hazardous and harmless wastes (classified according to the resource conservation and Recovery Act rcra])

◆ wastewater capacity

◆ wastewater characteristics

◆ wastewater treatment capacity

◆ feasibility and related costs of agreed towing service

◆ feasibility of auxiliary wastewater treatment

◆ equipment required for on-site treatment Labor and chemicals

◆ and obligations

◆ costs

◆ applicable pretreatment standards

for factories, the main disposal methods are agreement dragging or sewage treatment. The wastewater discharge standard has strict restrictions on the pH value, grease, solid and metal content of wastewater. Since metal cutting fluid contains many pollutants, it can only be discharged after it is treated and meets the local wastewater treatment standards

for plants that produce a small amount of oily wastewater, such as 95 to 11300 liters per day, the most typical and economic wastewater treatment method is protocol dragging or physical treatment, such as evaporation and concentration. Most national, regional and local agreed transport companies are authorized to tow and treat hazardous wastewater in accordance with RCRA standards and guidelines

evaporation concentration method is to evaporate the water from the used waste water through heating, so as to achieve the purpose of concentrating oil. This avoids the discharge of sewage, however, it may be required to have an air discharge permit

another commonly used physical treatment method is membrane separation, including two forms: ultrafiltration (UF) and reverse osmosis (RO)

ultrafiltration is to separate oil droplets with high molecular weight from water through permeable membrane, so that the water can meet the discharge standard. Ultrafiltration is very suitable for removing oil, grease and suspended solids, but it cannot extract dissolved solids. Ultrafiltration can treat about 190 to 56800 liters of wastewater per day. The process is relatively simple and compatible with the process of treating oily wastewater

if the plant needs to further improve the water quality, reverse osmosis (RO) is the best secondary treatment method. This reverse osmosis process is similar to ultrafiltration, but it uses higher pressure and denser semi permeable membrane. Contrary to natural permeation, it makes water flow from the high concentration side to the low concentration side of the semipermeable membrane

the pore size, material and structure of the membrane were continuously improved, and the treatment of oily wastewater was optimized. No matter what has been treated by ultrafiltration or reverse osmosis, it is usually no longer used. Incineration is a solution for the treatment of final oily concentrates and hazardous wastes

chemical treatment is usually more economical than physical treatment in the treatment of large quantities of oily wastewater. Chemical treatment uses various inorganic substances (such as aluminum sulfate or ferric chloride) and organic substances (cationic or anionic polymers) to demulsify oily wastewater. In addition, chemical treatment is very effective in treating and removing metals from oily wastewater

chemical treatment is the best way for factories that produce 190 to even more than 3785000 liters of wastewater per day. The by-products of chemical treatment are sludge and oily waste concentrate, which need further treatment to recover oil

although the domestic experimental machine technology is not the most basic treatment method compared with the imported experimental machine technology, as a secondary or tertiary treatment, the biological treatment method performs very well in reducing the organic matter in the metal cutting fluid. In wastewater treatment, the metal cutting fluid contains a large amount of organic matter, which makes it possible for bacteria to degrade. Both physical and chemical processes are almost always accompanied by biological processes. Again, the chemical treatment method is very economical for large users, especially when sewage discharge is not possible

related links: micron, formerly known as Cincinnati micron, has a history of more than 100 years

micron provides innovative solutions to maximize the productivity of the metal processing industry and has become an industry leader

micron metal working fluid series products include:

cimtech fully synthetic working fluid. It does not contain mineral oil. It is designed and produced for the most stringent metal processing. It has a wide range of applications. It is an ideal choice for light to heavy load machining and grinding. There is no odor in the air, including ferrous metals and non-ferrous metals

cimstar semi synthetic processing fluid. Its application range includes not only general machining and grinding, but also medium to heavy load operation of ferrous metals and many non-ferrous metals. A typical cimstar process fluid contains a small to medium amount of mineral oil, which is translucent when mixed with water. It is especially suitable for places that need long-term processing fluid and are highly clean

cimperial emulsified processing fluid. It is specially developed for heavy-duty machining and grinding of ferrous and non-ferrous metals. It has good corrosion resistance, long service life, high lubrication, low gloss and excellent odor control. The typical cimperial processing fluid contains extreme pressure additives, which can enhance its machining and grinding performance even in difficult applications

in addition, there are quantalube water-soluble super lubricant, milp8 granulated blast furnace slag powder ro cutting and grinding lubricant used in cement and concrete, milform/milraw stamping and drawing lubricant, oak products, cimclean water-based cleaner used for production and general cleaning, cimguard water-based and oil-based corrosion inhibitor and other products

original international metal processing business information (end)

Copyright © 2011 JIN SHI