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 inlet pipe and product water pipe of the RO unit, 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

The number of monitoring instruments configured in the system should meet the needs of safe, stable, and reliable operation of this system.

Flow measurement sampling points: Each reverse osmosis feed water, total product water, and cleaning water (after the security filter) is equipped with an on-site flow indicator.

Pressure measurement sampling points: On-site pressure indicators are installed at the inlet and concentrate outlet of each section of RO; pressure switches are installed at the inlet and outlet of the reverse osmosis feed water pump.

Analytical instrument measurement sampling points: Two automatic SDI instruments are installed at the inlet (mother pipe) of two security filters;

Level measurement sampling points: The cleaning water tank is equipped with a level gauge (with level alarm signal), and realizes the corresponding interlocking start and stop pump function.

Temperature measurement sampling points: The cleaning tank is equipped with a thermometer and a thermistor.

A conductivity meter is installed at the RO product water outlet, and a conductivity meter is installed at the total water inlet of the RO unit before the security filter.

 

03 Chemical dosing system

Provide a complete chemical dosing system according to system requirements, and provide information on chemical types, preparation concentrations, dosing amounts, and relevant instructions.

Requirements for the chemical dosing system:

Each chemical dosing system is designed in a unit form, and each set of chemical dosing equipment is equipped with a solution tank, metering pump, valves, pipes, etc.

The volume of various chemical solution tanks meets the daily chemical consumption of all equipment, and is equipped with on-site level indication and remote level indication, and can issue high and low level alarm signals.

The solution tank body is made of corresponding corrosion-resistant materials.

The chemical dosing device can automatically adjust the dosing amount according to the flow rate.

The pump stroke of the metering pump is 0～100% adjustable, and the output is 1.25 times the maximum dosing amount. The metering accuracy at the maximum stroke (relative stroke is 100%) is not less than 1%. The metering pump can receive flow signals and automatically adjust the dosing amount. The metering pump is a high-quality imported product with mature operating experience.

Valves are configured according to process requirements, and connecting valves are corrosion-resistant valves.

The chemical dosing pump will be designed for continuous operation. The pump arrangement should facilitate testing, replacement, and maintenance of all components.

All metal and non-metal parts in contact with the corresponding chemical solution are made of materials resistant to corrosion by the corresponding chemical solution.

Chemical preparation is carried out according to the low-level alarm signal of the chemical dissolution tank and the instructions of the operating personnel.

 

04 Degasifier

The configuration of the degasifier ensures that the water quantity and quality of reverse osmosis are met, and the effluent quality meets the inlet water requirements of the mixed bed.

The inner wall and main body piping system of the carbon dioxide remover are lined with two layers of semi-hard rubber. The outer wall is coated with two coats of anti-rust paint and two coats of light green topcoat. The carbon dioxide remover is equipped with a fan and motor. The fan parameters meet the operating requirements of the carbon dioxide remover. The carbon dioxide content in the effluent of the carbon dioxide remover should be less than 5mg/l. The carbon dioxide remover is equipped with a water collector, a wind cap, and an effluent water seal pipe. The water device of the carbon dioxide remover adopts a mother branch pipe type, and the packing support adopts a grid plate type.