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Engineering Case

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Petrochemical industry

Chemical Industry

Power Industry

Coal chemical industry

Printing and dyeing textile industry

Food/Biotechnology Industry

A petrochemical company in Dalian

A petrochemical company in Dalian uses a reverse osmosis (RO) system to treat secondary effluent from a wastewater treatment plant,with a treatment capacity of 24,000 m3/day,providing make-up water for the boiler system.
In April 2024, the first pass membrane system in the workshop was fully upgraded with KeenSen BW-8040XLFR anti-fouling membranes. After installation and commissioning, the system has demonstrated stable performance, with both the permeate flow and water quality meeting the client’s operational requirements.

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A Petroleum and Natural Gas Technology Company in Karamay

The project uses a reverse osmosis (RO) system to treat municipal tap water for boiler feed water, with a treatment capacity of 14,000 m³/day. In 2019,KeenSen BW-8040FR membrane were purchased and installed in the concentrate RO unit. Since commissioning, the system has been operating stably, with all performance indicators meeting production needs and technical specifications.

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A Petroleum Company in Shaanxi Province

The project uses a reverse osmosis (RO) system to treat surface water (from the Yellow River) for use as boiler feed water and process water. In January 2019, KeenSen BW-8040FR membranes were used to replace imported brands. Since then, the system has been operating steadily, meeting the client's expected service life and performance requirements.

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A chemical group in Shandong

A chemical group in Shandong uses a reverse osmosis system to treat water from a plain reservoir (surface water) for boiler water replenishment and pure water preparation. The treatment capacity is 25000 m³/d. In November 2023, seven reverse osmosis systems from three enterprises under the group all used Qinsen High-tech BW-8040XLFR anti-pollution membrane elements. Currently, the water production flow rate and water quality of each reverse osmosis system meet the owner's requirements.

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A chemical company in Shandong

A chemical company in Shandong uses a reverse osmosis system to treat surface water (Yellow River water) for boiler feed water and process water. In August 2022, three reverse osmosis units were replaced with Qinsen High-tech BW-8040LFR anti-pollution membrane elements. The membrane system has been running smoothly since then, and the current water production flow rate and water quality of each reverse osmosis system meet the owner's requirements.

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A gas-fired thermal power project in Zhejiang

The reverse osmosis (RO) system treats effluent from a wastewater treatment plant - pretreatment through ultrafiltration and reverse osmosis -to provide high-quality boiler make-up water for key process units.Since the project's launched in 2022, all three sets membrane systems across the workshops have been gradually upgraded with KeenSen BW-8040XLFR membrane model. Since the replacement and commissioning of membranes , the RO units have been operating with excellent stability.To date, both the permeate flow and water quality consistently meet the strict requirements of the end user, demonstrating the outstanding performance and reliability of KeenSen membrane.

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A thermal power plant in Zhejiang

This power plant in Shaoxing uses river water as its source,which is treated through pretreatment, reverse osmosis (RO), and EDI to produce demineralized process water for industrial units.The system has a treatment capacity of 100,000 m³/day.
Since 2021, the plant has adopted membrane products from KeenSen, with nearly 5,000pcs membranes replaced to date. The RO systems have been operating stably, and the current permeate flow and water quality consistently meet the requirements of the owner's requirements.

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A coal chemical enterprise in Anhui

The water source of the reclaimed water reuse system in a coal chemical industrial park in Huaibei, Anhui Province, is a mixture of power plant circulating wastewater and industrial wastewater. The industrial wastewater mainly consists of production and domestic sewage from enterprises in the Huaibei new coal chemical synthetic materials base park. After biological treatment by a newly built wastewater treatment plant, the wastewater meets the Class A standard of the "Discharge Standard for Pollutants from Urban Wastewater Treatment Plants". The overall treatment scale of the reclaimed water reuse system is 20000 m3/d, with a total of 4 reverse osmosis membrane systems. Three of them use KeenSen BW-8040FR membrane elements, while one uses imported Fouling-Resistant membrane elements for comparison. There is no significant difference in the operation indicators of the membrane systems, which has been well received by the owner.

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A coal chemical enterprise in Hulunbuir

The Hulunbuir Coal Chemical Project, with a processing capacity of 30,000 m³/d, began using KeenSen membrane products in 2018. Product models include BW-8040FR, BW-8040XLFR, and SW-8040MR, used in workshop desalted water systems, reclaimed water systems, concentrated brine systems, and zero-discharge high-pressure reverse osmosis systems, respectively. The excellent performance of KeenSen reverse osmosis membrane elements has reduced the frequency of chemical cleaning, saving operating costs, and the good price-performance ratio has received customer praise.

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A dyeing and printing enterprise in Guangdong

In this water reclamation project, the raw water is textile dyeing wastewater. Through pretreatment and nanofiltration (NF) treatment, the produced water is reused as process water. In October 2022 and February 2023, the NF membrane elements in Train AB and Train CD were replaced respectively, with a total replacement quantity of 720 elements. Since commissioning, the NF system has maintained stable operation, with both produced water flow rate and quality currently meeting the owner's specifications.

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A chemical fiber project in Henan

This water reuse project uses surface water as its feed source. Through pretreatment, the produced water is utilized as process water for chemical fiber production and boiler makeup water. The factory began using KeenSen membrane elements since 2017, with a cumulative replacement quantity of 2,000 units. In 2022, the project continued using KeenSen BW-8040FR fouling-resistant membrane elements. The reverse osmosis system employing KeenSen membrane elements in this water production plant operates stably, currently maintaining a salt rejection rate exceeding 98%. Both the produced water flow rate and quality consistently meet the owner's requirements.

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Desalination water project of a certain steel mill in Sichuan

The desalination project uses river water as its source, with a total treatment capacity of 15000 m³/d. In April 2023, the membrane elements of the two reverse osmosis systems in this project were replaced with KeenSen BW-8040FR Fouling-Resistant membrane elements. Since commissioning, the system has been operating stably, and both water production and Rejection Rate meet project requirements.

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Yeast project in Yunnan

2.Surface Water Serves as the Feedwater Source. After treatment via reverse osmosis (RO), the system supplies both process water and boiler feed water to the yeast production facility. In March 2024, the entire RO membrane array was upgraded to KeeSen BW-8040FR elements. Post-installation, the system has maintained stable operation, with product water flux and quality consistently meeting project specifications.

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A bio-technology project in Ningxia

Municipal tap water serves as the raw water source for this project. After dual-pass reverse osmosis (RO) treatment, the product water is supplied as boiler feedwater. All RO systems at the facility utilize our proprietary fouling-resistant membrane elements, which consistently meet operational performance requirements. The system has maintained spec-compliant product water flux and quality since its commissioning in February 2023.

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A waterworks in Ningbo

This region possesses a large area of tidal flats and a high-capacity tidal flat reservoir. Due to its coastal location, the collected water is from the end of the river network and has been subjected to a certain degree of pollution. It is slightly polluted brackish water and does not meet the water source water quality standards. This water plant is the largest domestic water plant using UF+RO dual-membrane deep treatment technology. The first-phase project has a designed daily water supply capacity of 50,000 tons and an actual daily water supply of 40,000 tons. The second-phase expansion project will reach 100,000 tons/day. The treated pure water is blended with ultrafiltration water to meet the national drinking water supply water quality standards.

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