System Equipment Configuration Description

The inner and outer surfaces of the chemical water treatment system equipment, pipes, valves, and accessories are corrosion-protected and coated to meet the requirements of the corresponding medium and surrounding environment.

The reverse osmosis unit is controlled by PLC, including normal operation, backwashing, all system protection, water flushing and cleaning of the reverse osmosis unit, etc., other equipment is manually operated.

01 Multi-media Filter

Each filter is equipped with complete valves, monitoring instruments, internal connecting pipes, various accessories, etc. The sampling hopper is installed in a position convenient for operation and maintenance. The pressure gauge has an isolation valve, and the equipment body has a sight glass.

1. Equipment Manufacturing Requirements:

a. Corrosion protection treatment inside the equipment.

b. All internal pipelines are connected to the main body using flanges, and the convenience of maintenance and component replacement is considered. The materials of the internal components meet the specified requirements, and the fasteners are of the same material as the internal pipes.

c. Internal components are fixed and reinforced to withstand the impact of water flow.

d. The material of the equipment sight glass is transparent and corrosion-resistant, and its thickness can withstand the design pressure of the container and the test pressure during the test. The inner surface of the sight glass is flush with the inner surface of the container.

e. The manhole of the container ensures the entry and exit of maintenance personnel and the entry and exit of replacement components. The inner surface of the manhole and manhole cover is flush with the inner surface of the container. The manhole is equipped with a complete set of components such as a manhole cover, gasket, bolts, nuts, and lifting rod.

f. All internal devices, pipes, and components of the container are installed and fixed inside the container before shipment to prevent missing parts and damage or loss during transportation.

g. The equipment is equipped with support feet.

2. The upper water inlet device of the filter is a baffle-type water inlet device, and the lower drainage device is a perforated plate.

3. Each filter is equipped with a flow meter on the inlet pipe and a pressure gauge on the inlet and outlet pipes.

 

02 Reverse Osmosis System

A complete reverse osmosis system, including security filters, high-pressure pumps, reverse osmosis membrane components, supporting instruments, valves, piping, and main body assembly, as well as chemical cleaning equipment.

The equipment output, effluent water quality, and other technical indicators meet the design requirements.

The reverse osmosis system adopts on-site/remote control operation mode. The configuration of monitoring instruments such as the water level of the intermediate water tank and the system water production meets the requirements of remote control start-up, shutdown, or system switching.

1. Security Filter

The structure of the security filter meets the requirements for quick replacement of filter elements.

A drain valve is installed on the water pipe entering the security filter.

2. Reverse Osmosis Water Pump (High-Pressure Pump)

The high-pressure pump adopts a vertical multi-stage water pump, and the materials of the pipes and accessories are all stainless steel.

A slow-opening device (control valve opening speed) and a pressure switch are installed at the outlet of the high-pressure pump to prevent the membrane components from being impacted by high-pressure water and to alarm and stop the pump when the pressure is high for a long time.

A pressure switch is installed for the alarm and shutdown signal when the membrane components are impacted by high-pressure water and the pressure is high for a long time.

The sealing method considers corrosion resistance, mechanical seal.

A pressure switch is installed at the inlet of the reverse osmosis water pump, which alarms and stops the pump when the pressure is low. A high-pressure switch is installed at the outlet, which alarms and stops the pump when the pressure is high.

3. Reverse Osmosis (RO) Unit

The RO unit is set up as 2 series units, each of which can operate independently or simultaneously.

The selection of reverse osmosis membrane elements is based on the characteristics of the water quality to select membranes with high water permeability, high desalination rate, good chemical stability

and good mechanical strength.

The design water flux of the RO membrane element should be selected according to the low value of the water flux specified by the membrane element. A reasonable arrangement and combination should be selected to ensure the normal operation of the membrane element and a reasonable cleaning cycle.

Based on the characteristics and requirements of the water quality, clearly specify the types and addition points of water treatment chemicals. The selection of chemical cleaning solution is determined according to the water quality and the characteristics of the selected reverse osmosis membrane components, and the required types and requirements of chemicals are proposed.

Sufficient interfaces and valves are installed on the RO unit's total water supply pipe and each section of concentrated water pipe, product water inlet and outlet pipe, so that they can be connected to the cleaning solution inlet and outlet pipes during cleaning.

The RO concentrate water drainage is equipped with a flow control valve (solenoid valve) to control the water recovery rate.

The design of the RO unit avoids the membrane element from withstanding back pressure.

Sampling points are set on the RO unit's inlet pipe and product water pipe, and the number and location of the sampling points can effectively diagnose and determine the operating status of the system.

4. Cleaning System

The cleaning equipment includes a cleaning tank, cleaning pump, security filter, cleaning tank electric heater, as well as pipes, valves, instruments, etc. All equipment should be assembled on a chassis to form a unit. The material and anti-corrosion coating of the cleaning system should be suitable for the cleaning solution used. The cleaning tank is equipped with an electric heater.

5. Flushing System

The flushing system includes a flushing pump, valves, and pipes. When the high-pressure pump stops, the flushing pump is linked. The control of the flushing system adopts program automatic operation and on-site operation.

6. Reverse Osmosis System Piping

The piping of the entire system avoids dead corners to prevent bacterial growth, and a flushing system is provided. High-pressure pipes use corrosion-resistant stainless steel (polished outer surface) for the corresponding medium.

7. Reverse Osmosis System Instruments

系统配置的监控仪表数量应满足本系统安全、稳定、可靠运行的需要。

流量测量取样点：每台反渗透给水、总产品水、清洗水（在保安过滤器后）装设就地流量指示。

压力测量取样点：RO各段进口及浓水出口装设就地压力指示表等；反渗透给水泵进出口设压力开关。

分析仪表测量取样点：两台保安过滤器进口（母管）设自动SDI仪；

液位测量取样点：清洗水箱设液位计(带液位报警信号),并实现相应联锁启、停泵的功能。

温度测量取样点：清洗箱设温度计和热电阻。

RO产品水出口设电导表，及保安过滤器前的RO装置总进水口设电导表。

 

03加药系统

根据系统要求提供完整的加药系统，并提供药品种类、配药浓度、加药量及相关说明等。

加药系统的要求：

各加药系统分别设计成单元形式，每套加药装置设有溶液箱、计量泵、阀门、管道、等。

各类药品溶液箱的容积满足全部设备一昼夜的药品用量，并分别装设就地液位指示和远传液位指示，并能发出高低液位报警信号。

溶液箱本体采用相应的耐腐蚀材料。

加药装置能根据流量自动调整加药量。

计量泵的泵行程0～100％可调，出力为最大加药量的1.25倍。在最大行程（相对行程为100％）点的计量精度不低于1％。计量泵能接收流量信号，自动调整加药量。计量泵为优质的并有成熟运行经验进口产品。

按工艺要求配置阀门，连接阀门为耐腐蚀阀。

加药泵将按连续运行设计。泵的布置应方便所有的部件测试、更换和检修。

所有与输送相应药液腐蚀的材料。

药品配置是根据药品溶解箱的低液位报警信号及运行人员的指令进行的。

 

04除碳器

除碳器的配置确保满足反渗透的水量与水质，其出水水质满足混床的进水要求。

除二氧化碳器内壁及本体管系衬二层半硬橡胶。外壁涂防锈漆二遍，浅绿色面漆二遍。除二氧化碳器配风机和电机。风机参数满足除二氧化碳器运行要求。除二氧化碳器出水中二氧化碳含量应小于5mg/l。除二氧化碳器配收水器、风帽和出水水封管。除二氧化碳器配水装置采用母支管式，填料承托采用栅格板式。