Small bag filter

Types of small bag filters

Small bag filters are commonly used in different industrial applications to remove solid particles from liquids. Here are some types of small bag filters:

• Multi-bag filter

  Multi-bag filters use several small bags to provide a large filtration surface area. They are typically used in high-flow applications where single-bag filters may not suffice. After passing through the multi-bag filter, liquids and fluids are usually 99.9% free of contaminants.

• Strainer

  Filters with strainers are made with a mesh material that typically captures larger particles. Once the liquid flows through the strainer, smaller particles will be left over or passed on for further processing through additional filtration systems. Using filters with strainers can prolong the life of bag filters by removing larger particles that may cause significant wear and tear.

• Cartridge filters

  Small bag filters differ from cartridge filters. The latter typically uses a pleated design to maximize surface area. Cartridge filters are often used in applications where chemical or biological contaminants must be removed.

• Long bag filter

  Long bag filters are used if people want to avoid the costs associated with frequent filter replacements. They are typically installed in small spaces and have a snap and secure closure feature. Short bag filters are usually housed in filter housings with a diffuser to create even distribution of the liquid being filtered.

• Dust collector bags

  When the small particles are fine powdered solids, it may be time to use a dust collector bag. This kind of bag filter is typically installed in an air-to-bag reverse pulse filter and removed using automated or manual cleaning systems. Sometimes, collecting bags are also used in liquid applications.

• Absolute-rated filter bags

  These filter bags are made from micron-rated felt or nylon mesh. They are designed to capture particles of a specific size, ensuring that the filtered liquid meets the required quality standards.

• Combination filters

  Combination filters utilize two or more distinct filter types to remove a broader range of contaminants.

• Low-pressure drop filter bags

  These small bag filters are designed to minimize pressure drops, ensuring efficient fluid flow and reducing energy consumption.

Specifications and Maintenance of Small Bag Filters

Specifications of small bag filters will vary depending on the application area and product type. Here are some common specifications alongside their corresponding maintenance requirements.

• Flow Rate

  The volume or amount of liquid that proceeds through the filter per unit of time is typically measured in GPM (gallons per minute) or LPM (liters per minute). The bag filters may need to be cleaned, replaced, or backwashed when they begin to clog up or cause a drop in pressure. This will help to maintain the flow rate.

• Micron Rating

  This refers to the size of particles the filter is manufactured to capture, such as 5, 10, 20, or 100 microns. To maintain efficiency, users may want to test the filtrate's quality. If the small bag filter is capturing particles and the quality starts to degrade, take it out and check its condition.

• Operating Temperature

  Small bag filters are made with materials that can filter liquids within certain temperature ranges. Users should regularly monitor the water temperature in the system. If the temperature is likely to rise above or below the specified limitations, consider using a small filter bag that can handle the temperature.

• Material

  Users should periodically inspect the material of the small filter bag and look for signs of degradation, damage, or wear. If any is found, they will need to replace the filter to maintain the system's integrity.

  If the filter material becomes clogged with impurities, follow the manufacturer's cleaning instructions to ensure it is properly cleaned and maintained.

• Capacity

  A small bag filter's capacity is the number of contaminants or particles it can capture before it needs to be replaced. Users should track the contaminants' levels in the area before filtering.

  This will enable them to estimate the small filter bag's usage and schedule the replacement proactively to maintain efficiency and avoid downtime.

• Dimensions

  These include the diameter and height of the small bag filter. When users need to replace the filter or deploy additional ones, they should get the exact dimensions required to maintain a proper fit and functionality.

Scenarios of small bag filters

Small bag filters can be used for different application areas to avoid the entry of any solid or particulate matter into the system or equipment. Here are some usage scenarios of small bag filters.

• Pharmaceuticals

  Small bag filters can be utilized in the pharmaceutical industry to guarantee that injectable drugs, vaccines, and other sterile products are free of contaminants. They filter the liquid components of these products before they enter filling machines or packaging lines, ensuring product safety and compliance with regulatory standards.

• Food and Beverages

  Small bag filters find applications in the food and beverage industry for filtering liquids such as juices, wines, dairy products, and flavored waters. They help remove particulate matter, yeast, and bacteria, contributing to the clarity, quality, and shelf life of food and beverage products.

• Cosmetic Products

  In cosmetic and personal care product manufacturing, small bag filters are used to purify raw materials, excipients, and finished products. They assist in eliminating impurities, allergens, and microbial contaminants, safeguarding the integrity and reputation of cosmetic brands.

• Oils and Fats

  Small bag filters are used in edible oil and fat production to remove solid contaminants such as fruit pulp, sediment, and fibers during the extraction and refining processes. They help improve the clarity and quality of the final edible oils.

• Chemicals

  Small bag filters are widely utilized in the chemical manufacturing industry to separate solid impurities from liquid chemicals, solvents, and intermediates. They are employed in processes such as polymer production, petrochemical refining, and chemical synthesis, among others.

• Water and Wastewater Treatment

  In water and wastewater treatment facilities, small bag filters are used as part of the treatment process to remove residual polymer, activated carbon, and fine particulate matter after coagulation and filtration. They contribute to the production of clean water for industrial, municipal, and environmental purposes.

• Industrial Processes

  Small bag filters are employed in various industrial processes, such as pulp and paper production, mining, textile manufacturing, and power generation, among others. They are used to protect pumps, valves, heat exchangers, and other equipment from abrasive and clogging particles, ensuring efficient operation and reducing maintenance costs.

How to choose small bag filters

• Fluids they are being used for:

  Users should think about the type of fluids they will use to process the small bag filters they want to buy. Different industries have diverse fluid handling needs. For example, the food and beverage industry often uses filters made from materials that meet sanitary standards. As a result, food-grade polypropylene or nylon is commonly used. Filter bags used in the food and beverage industry must not affect the taste or safety of the products.

• Production line compatibility:

  When selecting filter bags for purchase, it is crucial to ensure their compatibility with the existing production line equipment. This includes filters, pumps, valves, and other components that the bags will be working alongside. For example, industrial small bag filters should fit well with filter housings and filtration systems. A proper fit ensures effective separation and minimizes particle bypass. It also prevents contamination and maintains system efficiency.

• Capacity requirements:

  The capacity of small bag filters refers to the amount of liquid or material they can process before needing to change or clean them. Businesses with high production volumes may prefer small bag filters to handle large quantities efficiently.

• Cost:

  The initial investment and ongoing operating expenses are vital factors when choosing small bag filters. Compare the costs of different filter options. Consider the cost of replacement bags, maintenance expenses, and energy consumption. Selecting filters that provide a balance between performance and affordability can lead to significant cost savings in the long run.

Small bag filter FAQ

Q1: How does a small filter bag work?

A1: In the first stage of filtration, dust particles will be cleared from the surface of the small filter bag when the relative clean air passes through it. Then, the remaining fine particles will be trapped in the small filter bag, and finally, the clean air will be released into the atmosphere.

Q2: What are the features of small bag filters?

A2: The small bag filters are able to handle a wide range of air volumes, as well as high and low temperatures. The operating temperature of some small bag filters can reach 500℃. In addition, small bag filters can be used in both continuous and intermittent operating conditions.

Q3: What are the advantages of small bag filters?

A3: Some advantages of small bag filters are as follows: small bag filters can be designed to consume less energy; small bag filters can provide the option of rotary valves or full manual inspection and bag replacement; and small bag filters can be cleaned on-site using a jet cleaning system.