Product Details

1T/H pure water treatment system, pure water system manufacturer, detailed parameters of integrated pure water equipment

Process flow for configuring a reverse osmosis host
The detailed process flow diagram is shown in the attached figure, and the main process routes are as follows:

Design requirement: The effluent conductivity should be less than 20 μ S/cm to meet the water requirements of the electrophoretic coating industry, and the actual effluent conductivity of the equipment should be less than 15 μ S/cm.

1. Overview of Process System
The raw water is transported by the raw water pump to the quartz sand filter, which can remove suspended solids and colloids in the water. The effluent from the filter enters the activated carbon filter, then enters the resin softener to reduce the hardness of the water, and then enters the 5 μ m security filter to ensure that the effluent meets the inlet requirements of reverse osmosis, namely SDI ≤ 3.0 and turbidity ≤ 0.5 NTU. The effluent from the security filter is pumped by a high-pressure water pump to the reverse osmosis device to remove more than 95% of dissolved solids (TDS), hardness, etc. The effluent enters the pure water tank and is transported to the water supply point.

2 Main Process Equipment
2.1 Preprocessing System
The main purpose of pretreatment is to remove impurities such as iron and manganese metal ions, suspended solids, colloids, etc. in the raw water that hinder the subsequent operation of reverse osmosis. The processing facilities include quartz sand filters, activated carbon filters, resin softeners, etc.

2.1.1 Quartz sand filter
Quartz sand filters mainly remove suspended solids and colloids from water. The backwashing of quartz sand filters can be determined based on operating time or flow rate. One quartz sand filter is installed in this system.

(1) Main technical parameters

Specification: DN350

Processing capacity: 4.5 m3/h/unit

Design pressure: 0.6 MPa

Design temperature: 25 ℃

(2) The filter is equipped with a Runxin multi way valve.

(3) The filter piping adopts PVC-U pipe.

(4) The equipment body adopts a fiberglass lined PE inner liner with a thickness of 3mm.

(5) The performance, measurement configuration points, and quantity of instruments and meters equipped with filters must meet the safety, stability, and reliable operation requirements of this system.

2.1.2 Activated carbon filter
Coconut shell activated carbon is selected as the filter material;

Remove most of the organic matter, residual chlorine, colloids, etc;

(1) Main technical parameters

Specification: DN350

Processing capacity: 4.5m3/h per unit

Design pressure: 0.6 MPa

Design temperature: 25 ℃

(2) The filter is equipped with a Runxin multi way valve.

(3) The filter piping adopts PVC-U pipe.

(4) The equipment body adopts a fiberglass lined PE inner liner with a thickness of 3mm.

(5) The performance, measurement configuration points, and quantity of instruments and meters equipped with filters must meet the safety, stability, and reliable operation requirements of this system.

2.1.3 Resin Softener
(1) Main technical parameters

Specification: DN350

Processing capacity: 4.5m3/h per unit

Design pressure: 0.6 MPa

Design temperature: 25 ℃

(2) The filter is equipped with a Runxin multi way valve.

(3) The filter piping adopts PVC-U pipe.

(4) The equipment body adopts fiberglass lining with a thickness of 3mm.

(5) The performance, measurement configuration points, and quantity of instruments and meters equipped with filters must meet the safety, stability, and reliable operation requirements of this system.

2.2 Reverse osmosis system
Considering the water quality characteristics of this project, energy efficiency of the equipment, operating pressure, membrane permeability, membrane desalination rate, and salt content of the effluent, Walton ULP-31 series membrane elements are selected for reverse osmosis, with a standard desalination rate of over 98%.

This system is equipped with one set of reverse osmosis device.

(1) Main technical parameters

Design inlet water temperature: 25 ℃.

Desalination rate: Reverse osmosis ≥ 98%.

(2) The design flux of RO membrane elements should not exceed the high flux value specified in the membrane element manufacturer's guidelines to ensure the normal operation and reasonable cleaning cycle of the membrane elements.

(3) There are sufficient interfaces and valves on the inlet and outlet pipes of each section of the RO device for water supply, concentrated water, and product water, in order to connect with the inlet and outlet pipes of the cleaning solution during cleaning.

(4) Install explosion-proof membranes, check valves, and shut-off valves on the water pipes of RO device products.

(5) RO concentrated water drainage must be equipped with a flow control valve (steady flow valve) to control the water recovery rate.

(6) The RO device should be equipped with a program start stop device, which can delay automatic flushing after shutdown. An automatic flushing water valve should be installed on the inlet manifold.

(7) Sampling points are set up for the RO device product water pipe and concentrated water pipe, and the number and location of sampling points can effectively diagnose and determine the operating status of the system.

(8) The RO membrane module is installed on a combination frame, which is equipped with all pipelines and joints, as well as all brackets, fasteners, fixtures, and other accessories. The high-pressure pipe is made of stainless steel material, while the low-pressure pipe is made of UPVC material.

(9) The design of the RO combination frame should meet the seismic intensity requirements of its factory site and the expansion requirements of its components.

(10) The performance, measurement configuration points, and quantity of instruments and meters equipped with the RO system must meet the safety, stability, and reliable operation requirements of the system.

(11) Security filter

a. The structure of the security filter can quickly replace the core.

b. The top of the security filter is equipped with an exhaust valve.

c. The filtering accuracy of the security filter is 5 µ m.

d. The operating flow rate of the security filter element is ≤ 6 m3/m2 · h.

(12) High pressure pump

a. The outlet of the high-pressure pump is equipped with a slow opening valve and a pressure switch to prevent the membrane components from being impacted by high-pressure water, high pressure alarms, and pump shutdowns.

b. The inlet of the high-pressure pump is equipped with a pressure switch, which triggers a low pressure alarm and stops the pump.

c. The material of the overcurrent part of the high-pressure pump is stainless steel.

d. The high-pressure pump adopts mechanical seals.

3 Electrical
3.1 Scope of Electrical Supply
The first party is responsible for introducing the dual power supply into the distribution cabinet, including all electrical control and electrical equipment such as low-voltage distribution and machine side operation boxes.

3.2 Power Supply and Distribution
The voltage level of the electrical equipment in the pure water station is 380/220 VAC. Install a low-voltage distribution cabinet, also known as an MCC cabinet, to supply power to the power equipment of the pure water process system.

3.3 Electrical Equipment Control
The centralized control operation is carried out in the electrical control cabinet, and the control is achieved by manual control buttons.

3.4 Lightning Protection and Grounding
Lightning protection: According to relevant regulations and standards, connect to the lightning protection system of the entire plant.

Grounding: According to relevant regulations and specifications, all electrical equipment that requires protective grounding should be reliably connected to the corresponding grounding system. Mainly including grounding of power distribution equipment, mechanical and electrical equipment, control panel cabinets, etc.

3.5 System Control
This project uses an electric control box to manually/automatically control the water treatment system, which can switch between automatic and manual operation modes, and display the main monitoring indicators and system operation status during the process.

Flow control is installed in the main pipeline and branch pipelines of various equipment, and online conductivity meters are installed at the inlet and outlet of the reverse osmosis system.

3.6 Main Control Circuits
3.6.1 Water pump control

The raw water pump, booster pump, filter backwash pump, etc. are all automatically controlled to start and stop according to the corresponding water tank level, while interlocking the start and stop of the entire system equipment.

The inlet and outlet of the high-pressure pump in the RO device are equipped with low-pressure and high-pressure protection switches. When the water supply is insufficient and the water pressure at the inlet of the high-pressure pump is lower than a certain set value (usually 0.1 MPa), a signal will be automatically sent to stop the operation of the high-pressure pump and protect it from idling. When the outlet pressure of the high-pressure pump exceeds a certain set value (usually 2.0 MPa) due to other reasons or misoperation, the high-pressure pump outlet pressure protection will automatically cut off the power supply to the high-pressure pump and stop the corresponding RO device to protect the system equipment from damage.

3.6.2 Control of Quartz Sand Filter

The quartz sand filter meets functions such as startup, operation, backwashing, forward washing, shutdown, and backup.

3.6.3 Control of Activated Carbon Filters

Activated carbon filters meet functions such as startup, operation, backwashing, forward washing, shutdown, and backup.

3.6.4 Control of Reverse Osmosis System

The control system uses an electronic control box to display real-time data such as conductivity, flow rate, pressure, etc. The panel buttons manually control the start, operation, flushing, and shutdown of the reverse osmosis system

3.7 System Instrumentation
The configuration points and quantity of system instruments can fully meet the needs of safe, stable, and reliable operation of this system.

3.7.1 Flow measurement points
(1) Point for installing flow meter

Raw water inlet pipe;

Each reverse osmosis inlet pipe;

Each reverse osmosis water production and concentrated water pipe;

Main pipeline for desalination water export.

(2) Install on-site flow indication points

Cleaning device security filter outlet pipe;

Backwash water pump outlet pipe.

3.7.2 Pressure measurement points
(1) Point for installing on-site pressure gauge

Quartz sand filter inlet and outlet pipes;

Activated carbon filter inlet and outlet pipes;

Each section of reverse osmosis has its own inlet, concentrated water outlet, and production water pipe;

Import and export of various security filters;

The outlet of each water pump.

(2) Point for installing pressure switch

Inlet and outlet of each reverse osmosis high-pressure pump;

3.8 Analytical instrument measurement (analog output) points
Point for installing conductivity meter (analog output)

Each reverse osmosis inlet pipe;

Each reverse osmosis production pipe;

Demineralized water main pipe.

4. Public works
4.1 Water supply system
The production water uses purified water produced by this device, with an RO effluent volume of 1m3/h

4.2 Drainage system
The production wastewater is mainly concentrated water from reverse osmosis, which is used for backwashing the filter before being discharged. It is recommended not to return it to the pre-treatment water system to avoid salt concentration and enrichment. ：

Maximum flow rate of primary reverse osmosis concentrated water: 1.5-2 m3/h;

Pressure: greater than 0.4 MPa.