Walnut Shell Filter

Our walnut shell filter is a professional industrial filtration equipment specially designed for oily wastewater treatment and suspended solids removal, which has been widely recognized in the global industrial water treatment market. 

Adopting specially processed high-quality walnut shell as the core filter media, this equipment adopts pressure-type deep bed filtration technology, making full use of the large specific surface area, strong adsorption capacity and oleophobic-hydrophilic properties of walnut shell media, to efficiently capture oil droplets, suspended impurities and colloidal pollutants in water. Unlike traditional sand filters and fiber filters, it breaks through the bottleneck of poor oil removal effect of conventional filtration products, and can stably realize high-efficiency purification of oily process water, produced water and industrial wastewater, helping enterprises realize water recycling and meet strict environmental discharge standards. It features compact structure, stable operation and strong adaptability, which is an ideal filtration choice for oil, petrochemical, municipal and other industrial fields.

Technical Characteristics

This walnut shell filter integrates mature filtration technology and optimized structural design, with outstanding technical performance, and its core technical parameters and characteristics are as follows:

Anti-blocking Design: Adopts anti-blocking labyrinth water distribution structure instead of ordinary sieve tubes, effectively avoiding filter blockage caused by long-term operation or water quality fluctuation, ensuring continuous and stable filtration efficiency.

Automatic Backwash System: Equipped with mechanical stirring and reverse flushing device, the walnut shell media can be fully regenerated through mutual friction during backwashing, restoring adsorption capacity quickly and reducing manual maintenance workload.

Strong Chemical Stability: The walnut shell media is inert to acid and alkali, not easy to dissolve or deteriorate, suitable for wastewater treatment in various pH value ranges, and the equipment performance remains stable for a long time.

Flexible Combination: Supports single machine operation or series/parallel connection, which can be flexibly matched according to on-site water volume and purification requirements, with strong scalability.

Core Advantages

Compared with conventional filtration equipment, our walnut shell filter has unique competitive advantages in industrial water treatment, which can bring tangible benefits to enterprise operation and environmental protection management:

Superior Oil and Impurity Removal Efficiency: The oil removal rate can reach 90-95%, and the effluent oil content can be controlled below 5mg/L, which far exceeds the treatment effect of sand filters and other traditional media, effectively solving the problem of oily wastewater purification that is difficult to handle by conventional equipment.

Cost-Effective and Eco-Friendly: The walnut shell media has long service life, low replacement frequency; backwash consumes less water and no chemical reagents, reducing water and reagent costs; the media is natural and degradable, avoiding secondary pollution to the environment, in line with global green industrial development trends.

Stable and Reliable Operation: With few vulnerable parts, strong impact resistance to water quality and flow fluctuation, 99% of operational uptime can be achieved, reducing equipment downtime and maintenance costs, and ensuring the continuity of enterprise production.

Wide Adaptability to Working Conditions: It can operate normally under high oil content, high suspended solids and certain temperature and pressure conditions, and is applicable to various complex industrial wastewater scenarios, with strong universality.

Simple Operation and Maintenance: The equipment has a high degree of automation, simple operation interface, no need for professional and technical personnel for long-term supervision, and daily maintenance is convenient, reducing the labor cost of enterprise water treatment posts.

Application Fields

Relying on excellent filtration performance and stable operation characteristics, this walnut shell filter is widely used in various industrial fields that need to treat oily wastewater and purify water quality, covering the main global industrial water treatment scenarios:

Oilfield Industry: Mainly used for oilfield produced water treatment, drilling wastewater purification, and well site water recycling, solving the problem of oily water discharge in oil exploitation and meeting the requirements of oilfield environmental protection and water reuse.

Petrochemical Industry: Applicable to refining wastewater, chemical process water and circulating cooling water treatment, removing oil and suspended impurities in water, preventing pipeline blockage and equipment scaling, and ensuring the normal operation of petrochemical production devices.

Municipal Water Treatment: Used for advanced treatment of municipal sewage and purification of reclaimed water, improving water quality standards and promoting the recycling of urban water resources.

Industrial Circulating Water System: Purifying industrial circulating cooling water, removing oil and suspended solids, reducing water quality deterioration, extending the service life of circulating water, and reducing the amount of fresh water supplement.

Metallurgical and Food Processing Industry: Treating oily wastewater generated in metallurgical rolling, food frying and other production links, realizing wastewater purification and up-to-standard discharge, and helping enterprises comply with environmental regulations.

Frequently Asked Questions (FAQ)

1. Q: What is the service life of the walnut shell filter media? How often does it need to be replaced?

A: The specially processed walnut shell media has high wear resistance and regeneration performance. Under normal working conditions, the service life can reach 2-3 years. The replacement cycle can be determined according to the actual water quality and operation time. When the filtration efficiency drops significantly and cannot be restored by backwashing, the media can be replaced.

2. Q: Can this walnut shell filter adapt to high-salt wastewater or acidic/alkaline wastewater?

A: Yes. The walnut shell media has good chemical stability and is inert to most acid, alkali and salt environments. It can stably operate in wastewater with pH value of 4-10 and certain salinity, and is suitable for various complex industrial wastewater quality conditions.

3. Q: Is the installation and operation of the equipment complicated? Do we need professional technical support?

A: The equipment has a compact structure and comes with detailed installation and operation manuals. The overall installation is simple, and the automatic control system is easy to operate. We will provide professional technical guidance and after-sales support. Ordinary operators can master the operation skills after simple training without long-term supervision by professional technicians.

4. Q: Can you customize the walnut shell filter with non-standard parameters according to our on-site working conditions?

A: Absolutely. We support customized design of equipment parameters such as treatment flow, shell material, filtration accuracy and control mode according to your on-site water volume, water quality characteristics and installation space, to perfectly match your actual working condition needs.

5. Q: Can the effluent quality of the walnut shell filter meet the local environmental discharge standards?

A: The equipment has high filtration efficiency, with oil removal rate up to 90-95% and suspended solids removal rate over 90%. The effluent quality can meet most national and regional industrial wastewater discharge standards. For areas with stricter standards, we can optimize the equipment configuration to achieve higher purification requirements.

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