A process used in the separation of solid particles and impurities from liquids, gases, or air is filtration technology. This technology plays an important role in various applications and industries that ensure the quality of the products. Filtration systems are an important technology for removing unwanted substances. These systems can enhance the product quality and maintain operational safety. Pile Cloth Disk Filters are known for their high-performance capabilities that come in two configurations. One of them is Out-to-In (outside-in), and the other one is In-to-Out (inside-out). Here, we are going to understand the difference between these two designs and check out Out-to-In vs In-to-Out Pile Cloth Disk Filters: Which One Delivers Superior Filtration.
Overview of Pile Cloth Disk Filters
The advanced filtration systems that use a three-dimensional cloth as a medium can remove the total suspended matter from water, such as Pile Cloth Disk Filters. The complex fibre structure of the cloth makes it easy for both surface and depth filtration to capture particles of different sizes successfully. The main advantages of the pile cloth disk filter are that it can operate continuously and allows continuous filtration during the cleaning process, and maintains consistent water quality. Moreover, the direction of water flow can impact the filtration process and its efficiency. There are two primary configurations for pile cloth disk filters: Out-to-In and In-to-Out. Here is the brief information about these two configurations:
Out-to-In Filtration (Outside-In):
In Out-to-In Filtration, water enters the filter from the exterior of the pile cloth media and moves inward toward the central collection point. As the water passes through the tightly packed fibres, the suspended particulates in the outer layer form a filter cake. The design helps in removing the larger particles and enables a straightforward backwashing process. In this process, the collected solids are released by reversing the flow direction.
In-to-Out Filtration (Inside-Out):
On the other hand, in the In-to-Out configuration, water moves from inside the filter to outwards that causes dirt and waste matter to accumulate on the surface of the fibres. During the process, backwashing (cleaning the filter), the dirt on the surface has to travel the entire length of the fiber to be removed. This can be less effective and needs more energy for the procedure. If the fibre gets clogged, then the filter may work slowly or not properly until it is cleaned again.
Comparative Analysis: Out-to-In vs In-to-Out Pile Cloth Disk Filters: Which Delivers Superior Filtration?
Comparative analysis of Out-to-In vs In-to-Out Pile Cloth Disk Filters includes several factors that come into play, which help in evaluating the effectiveness of these two. Some factors that can help in comparative analysis include filtration efficiency, Backwashing Performance, Operational Considerations, and Suitability. Here is the brief of these factors for analysis.
1. Filtration Efficiency:
- Out-to-In:
Filtration Efficiency of Out-to-In (water flows from the outside to the inside) filters is higher when removing the larger particles. Water flows through the pile cloth media into the filter disc from outside. This method offers efficiency in removing pollutants with systems and is used in tertiary water filtration. Out-to-In configuration requires low-energy consumption and minimal maintenance.
- In-to-Out:
In-to-out pile cloth disc filters (water flows from the center towards the outside) exhibit higher filtration efficiency. This configuration offers better contamination removal through the way the filter media is structured.
2. Backwashing Performance:
The cleaning process in Out-to-In filters is simpler. In backwashing process of this configuration can help in removing a large amount of trapped particles by reversing the direction of flow. On the other hand, in In-to-out filters, the need to throw out the solids from fibres may require more energy and less efficient cleaning.
3. Operational Considerations:
When it comes to the operational considerations of these configurations, Out-to-In filters are less prone to issues caused due to fibre clogging. Its design helps in easy detection and blockage removal with consistent filtration performance and maintenance. Conversely, In-to-Out filters may lead to face challenges with internal clogging that can potentially lead to reduced flow rates and increased requirements for maintenance.
Comparison Of Filter Systems
| Contents | [Pile Cloth Disk Filter] | [Micro Disc Filter] |
|
Filtration Method |
▪ 100% submerged ‘OUT→IN’ filtration.
▪ Gravity-horizontal flow filtration by pile cloth disk media depth filtering ▪ Continuous filtration as Treatment and Backwash is simultaneously operated. |
▪ 55% submerged ‘IN→OUT’ filtration.
▪ Gravity-horizontal flow filtration by screening. ▪ Continuous filtration as Treatment and Backwash is simultaneously operated. |
| Filter Media | Cloth media: Polyester (woven support)
→ No deformation and high durability ▪ Pore size: nominal 1~10µm |
▪ Cloth media: Polyester(woven mesh screen)
→ High risk of blockage and easily tears ▪ Pore size: 10~30µm |
| Head Loss | ▪ Gravity flow: about 250mm | ▪ Gravity flow: about 250mm |
|
Backwash Method |
▪ Suction backwashing by Dual-slit
backwash device and Low-pressure (1~2bar) pump |
▪ Spray cleaning by backwash nozzles and
High-pressure (6~8bar) pump |
| Backwash
Rate |
▪ Below 3% of Influent capacity. | ▪ Below 3% of Influent capacity. |
| Segments
Per disk |
▪ 4, 6, or 8 segments classified by models. | ▪ 28 segments |
| Chemical Cleaning | ▪ Automated chemical cleaning without
disassembling disk. |
▪ Manual chemical cleaning after
disassembling the disk with an extra device. |
| Operation | ▪ Automatically drive, backwash by Level
A switch that detects a water level difference and Timer, the disks are rotating during backwash. |
▪ Automatically drive, backwash by Level
A switch that detects a water level difference and Timer, the disks are rotating during backwash. |
| Sediment
Sludge Drain |
▪ Discharge by drain pipes on the bottom. | ▪ None |
|
Operation Energy |
▪ Low demand for electrical power
▪ Competitive price of Spare parts |
▪ High demand for electrical power
▪ High-priced Spare parts |
| Advantages | Low initial investment and operating costs.
▪ Treatment efficiency is stable due to the pile cloth disk media depth filtering. ▪ 100% submersion type utilizes the entire disk area, thus reducing the installation area. ▪ As the water passes from OUT to IN of the filter media, it copes well with influent shock load. ▪ The special backwash method using suction backwash pumps and the patented dual-slit The suction plate secures the initial filtration flow rate without clogging the pile of cloth media even during mid-long term operation. |
▪ As 55% of the total filtration area is
Submerged, one or two disks can be replaced without draining. |
| Disadvantages | ▪ As 100% of the total filtration area is
submerged, for replacement of the disk, drainage is required. ▪ Required replacement of the cloth media When the lifetime finished. |
▪ The removal efficiency is limited according to
to the particle size distribution of the suspended solids in the influent because only the screening by the pores of woven mesh screen. ▪ If the influent contains a large amount of fine particles, the treatment efficiency is very low. ▪ High initial investment and operating costs. ▪ The filter media is blocked due to the accumulation of suspended matter in the center drum when a high SS concentration load influent passes from IN to OUT of the filter media. ▪ Manual chemical cleaning for cloth media and nozzles are required more than once a year. (High-pressure acid/chlorine washing after disassembling, shutdown required) ▪ Thin plate-type cloth media can be easily damaged when a water level difference of 25cm or more occurs. If configuring a bypass to prevent this problem, the risk of An untreated water discharge would happen. ▪ Required replacement of the cloth media When the lifetime finished |
Conclusion
The choice between Out-to-In and In-to-Out Pile Cloth Disk Filters depends upon different requirements of the filtration process, which include various factors such as flow rate and particle size. From the above comparison, we conclude that the Out-to-In filters are preferred more in applications in which the liquids large volumes of liquid are filtered. On the other hand, In-to-Out Filters are suited for applications in which the removal of smaller particles and finer filtration is required. While both designs have different advantages, Out-to-In filters are best in operational efficiency, whereas In-to-Out filters are better at fine filtration.
Contact us today!
Adroit specializes in pile cloth Disc Filters and offers various advantages such as high filtration quality and potentially energy-efficient operation. You can contact Adroit through the following contact details for superior filtration services.
Address: 01/101 Satguru Prime -11 Scheme – 140 Main Road, opposite Vaishnav Dham Mandir, Indore, Madhya Pradesh 452016
Mail Us: [email protected]
Call Us: +91 70248-48383
Frequently Asked Questions for Pile Cloth Disk Filters:
Q. Which one offers superior Filtration among Out-to-In vs In-to-Out Pile Cloth Disk Filters?
Ans. Among Out-to-In and In-to-Out Pile cloth Disk Filters, the Out-to-In design offers high-level filtration performance. Based on the specific needs of filtration and system design considerations, Out-to-In delivers superior filtration.
Q. What are the applications of Pile cloth Disk Filters?
Ans. Pile cloth disk filters are used in different applications of water treatment. These applications include industrial wastewater treatment and drinking water treatment that can remove the solids, phosphorus, and other pollutants effectively.
Q. Can Pile Cloth Disk Filters be used for Water reuse?
Ans. Yes, Pile Cloth Disk Filters can be used for water reuse in irrigation, cooling water, and process water supply. The pile cloth disk filters can help in removing the impurities and contaminants from the water and enable water reuse.
