The filter cloth of the sludge press is now too common in companies and goods manufacturing enterprises, without the filter cloth, the waste treatment system of the unit will be in big trouble, not only affecting directly affect production activities, but also cause consequences affecting the environmental ecosystem and therefore will be in trouble related to the law if hazardous waste is not filtered before being discharged into the environment. With each different production unit, their waste is of course also relatively different, so when choosing filter cloth, they also need to know which type is best, most suitable for their unit. , so it is effective when put into operation in the new sludge presses with the best results.
Our today’s article will help you have a better look at the current mud press fabrics , from which you will know the classifications of them to find the most suitable filter cloth for the sludge dewatering machine at taste yourself. In addition, we would like to summarize the answers to the most frequently asked questions related to mud filter cloth.
1. WHY SHOULD CLASSIFICATION OF FABRIC FILTER FILTERS?
Filter cloth has wide applications in companies and units producing heavy – light industrial goods, and in the agricultural field filter fabrics also have applications, so depending on the production industry, What type of product is produced, what type of mud press is, there will be different ways to use the filter cloth . Therefore, we need to classify sludge filter cloth .
The classification of sludge filter cloth for each type of production, in addition to helping to operate the sludge press machine effectively, also helps the same production unit save time, money, and even use the same type of sludge. Non-toxic waste as fertilizer for plants.
When sorting the filter cloth, it will save time and money because if we subjectively think that any filter cloth can be used for our company’s sludge press or the waste sludge of the production unit. It is a mistake that leads to the loss of both time and money. Using the wrong fabric for the slurry press, the presser frame and filter cloth frame will not be together (the excess and the missing), now if you continue to use them to operate the slurry press, then effect will be absent, and in case the filter cloth for the slurry press may be torn. In a situation like this, you are forced to go to the store again and again to buy another filter cloth, which not only takes time to choose again, but also costs a lot of money to buy filter cloth.
Therefore, it is extremely necessary to identify the sludge filter fabrics , if you still do not have much information before you go to buy you can search through some information related to the mud filter fabrics, but often the There are very few and no details on this online, now you can ask for the advice of the store you buy to choose the filter cloth for the sludge press that best suits the condition of the press, the type of sludge of the unit. its producer.
2. POPULAR FILTER FACTORS CURRENTLY
The main mud filter fabrics at present are woven and non-woven fabrics. These are made from synthetic materials such as polyester fabric, polopropylene fabric, nylon fabric and PVA fabric.
In order to meet more information about mud filter fabrics in the current situation that this information online is still incomplete, we would like to list in detail for you, your manufacturing company about these fabrics. Filter this mud so that when you go to buy, you will determine which filter fabric you need to buy to avoid losing time in the selection process.
Polyester filter cloth (PE)
This is a sludge filter fabric consisting of polyester fabric, polyester filament and polyester staple fiber fabric. Properties of this fabric can be resistant to weak acids and bases.
This type of mud filter cloth has corrosion resistance, weak conductivity, so when operating the mud press, it will save electricity generated by conduction.
The temperature of the polyester fibers that form the polyester filter press is usually at a temperature of 130 0 C – 150 0 C, so the fabric is smooth, easy to handle the amount of sludge when operating. Here are the parameters about this fabric you should know:
- Heat resistant: at 120 ° C
- Breaking force ( g/d ): 438
- Stretch (%) : 20 – 50
- Fabric softening point ( 0 C): 238 – 240
- Melting point ( 0 C): 255 – 260
- Fabric Weight: 1.38
- Filter performance of Polyester slurry: Due to the short fabric structure, the adhesion between the dense fibers is good, but it is not ventilated, easy to peel off. But the surface of the cloth is smooth, the durability is appreciated, the wear resistance is good, when using the sludge filter, it can be easily cleaned.
- Objects of use: Used to filter sludge in the pharmaceutical, food, chemical, metallurgical industries, commonly used in industrial presses, multi-disc screw presses .
Polypropylene (PP) slurry filter cloth
This is a filter cloth made of polypropylene fiber or polypropylene fiber filter cloth. Filtration performance of polypropylene slurry filter fabric from short fibers twisted into yarns or long fibers forming fine threads Therefore, the short fiber polypropylene filter cloth has a better filtration efficiency than the long fiber type.
Some parameters about polypropylene fabrics:
- Heat resistant: 100 0 C
- Filtration level: 1 – 200 micron
- pH: 1 – 14
- Weight ( g/m 2 ): 350 – 530
- Temperature: < 90, max 100
Genuine polypropylene mud filter cloth can withstand the effects in chemical environments without deformation. Especially, it is possible to filter basic or acidic solutions, fine filtration, and large volumes of sludge. Easy to clean, install, bend to the desired shape, not molded to exactly one shape. Warehouse operating in high pressure environment does not change the physical and chemical properties of the fabric.
Nylon mud filter cloth
This filter cloth has high strength, strength up to 4-5 Cndtex. Nylon mud filter cloth is considered to be the strongest fabric, according to durability, the abrasion of cotton fiber is 10 times, even 50 times that of viscose. So in addition to the mud filter, this fabric is the same material that is ideal for manufacturing and manufacturing car tires.
Nylon slurry filter cloth has weak alkali and acid resistance. After processing, put into operation at 95 0 C under NaOH (Sodium hydroxide) does not lose its inherent strength. But nylon is easily discolored, so it is not recommended to expose nylon fabric for too long or to direct sunlight.
Some technical parameters of Nylon mud filter cloth:
- Heat resistant: 90 0 C
- Filtration level: 37 – 1500 micron
- Thickness of nylon fabric: 65 – 850 micron
- Elongation ( %): 18 – 45
Nylon filter cloth is toxic and harmful to human health, so it is not used in pharmaceuticals and food and beverage production.
Commonly used in metallurgy, rubber, chemical refining
PVA . filter cloth
PVA fabric is also known as Polyvinyl alcohol. This is a filter cloth with weak flexibility, maintaining a fixed shape, so it cannot change shape like PP fabric. However, this fabric has good abrasion resistance, durability is 1-2 times higher than cotton. This is also considered a great advantage of this fabric, in addition, this filter cloth for slurry presses also has good moisture absorption.
Some parameters of PVA fabrics:
- Strength: 3.52 – 5.72 Cndtex (lower than PE)
- Elongation ( %): 12 – 25
- Heat resistant: 100 0 C
This fabric is easily combined with rubber, so it is used for many sludge filtration in the rubber industry and some other basic manufacturers.
The above are the most commonly used mud filter fabrics today, each fabric has a different model – number corresponding to the filter level, thickness, stretch, … different. Therefore, when buying, your company can ask for more advice from the place that sells mud filter cloth .