一． 设备简介

1、 Equipment introduction

车用尿素是重型卡车、客车等柴油车达到国四排放标准的所需产品。车用尿素是由32.5%的高纯尿素和67.5%的去离子水组成。也就是说，把高纯度的尿素溶解在高纯度的水中形成为溶液。为什么须使用超纯水设备制取的超纯水作为溶解液?使用自来水作为溶液，会造成什么样的后果呢?如果车用尿素液纯度不够、或质量伪劣，都会发生车辆发动机自动减速，同时，会污染SCR催化反应罐中的催化剂，造成严重后果。所以，车用尿素生产须使用一级超纯水(电阻率≥18MΩ.cm)。

Vehicle urea is the product for heavy trucks, buses and other diesel vehicles to meet the national four emission standards. Vehicle urea is composed of 32.5% high purity urea and 67.5% deionized water. That is to say, high purity urea is dissolved in high purity water to form a solution. Why should ultrapure water produced by ultrapure water equipment be used as dissolving solution? What are the consequences of using tap water as a solution? If the purity of vehicle urea liquid is not enough or the quality is inferior, the vehicle engine will slow down automatically, and the catalyst in SCR catalytic reaction tank will be polluted, resulting in serious consequences. Therefore, the first grade ultra pure water (resistivity ≥ 18m) must be used in the production of vehicle urea Ω. cm)。

JDB电子水务在满足用户用水标准的基础上，在设备系统中水箱均设有液位控制系统、水泵均设有压力保护装置、在线水质检测控制仪表、电气采用PLC可编程控制器，真正做到了无人职守，同时在工艺选材上采用推荐和客户要求的方法，使设备与其它同类产品相比较，具有更高的性价比和设备可靠性。

On the basis of meeting the user's water use standard, Hongjie water has set up liquid level control system in the water tank of the equipment system, pressure protection device in the water pump, online water quality detection and control instrument, and PLC programmable controller in the electrical system, so that no one is on duty. At the same time, the method of recommendation and customer requirements is adopted in the process of material selection, so that the equipment is compared with other similar products, It has higher cost performance and equipment reliability.

二． 设计标准及依据

2、 Design standard and basis

1. 根据用户提供的详细水质报告“量身定制”。

1. According to the detailed water quality report provided by the user, "customized".

2. 水处理设备技术条件《JB/T 2932-1999》

2. Technical conditions of water treatment equipment JB / T 2932-1999

3. 反渗透水处理设备标准《CJ/T119-2000》

3. Standard for reverse osmosis water treatment equipment CJ / t119-2000

4. 低压开关设备和控制设备成套装置《IEC439-1 》

4. Complete set of low voltage switchgear and control equipment iec439-1

5. 实验室超纯水技术指标标准《GB6682-2008 》

5. Technical index standard of laboratory ultra pure water gb6682-2008

6. 电子级超纯水规格《GB/T11446.1-1997》

6. Electronic grade ultra pure water specification GB / t11446.1-1997

三． 工艺流程

3、 Process flow

1、 原水－原水加压泵－多介质过滤器－活性炭过滤器－软水器－精密过滤器－一级反渗透设备－纯水箱－阴阳混床装置－抛光装置－用水点

1. Raw water - raw water booster pump - multi medium filter - activated carbon filter - water softener - precision filter - primary reverse osmosis equipment - pure water tank - mixed bed device - polishing device - water point

2、 原水－原水加压泵－多介质过滤器－活性炭过滤器－软水器－精密过滤器－级反渗透－PH调节－中间水箱－级反渗透－纯化水箱－纯水泵－EDI系统－超纯水箱－纯水泵－抛光装置－用水点

2. Raw water - raw water booster pump - multi media filter - activated carbon filter - water softener - precision filter - stage reverse osmosis - pH regulation - intermediate water tank - stage reverse osmosis - purified water tank - pure water pump - EDI system - ultra pure water tank - pure water pump - polishing device - water point

四． 设计特点

4、 Design features

1. 系统采用全自动控制(同时亦可采用手动控制），系统运行时可设定自动反洗、再生程序；

1. The system adopts full automatic control (manual control is also available), and automatic backwashing and regeneration procedures can be set during system operation;

2. 各单元接线均在工厂内完成，减少安装调试时间；

2. The wiring of each unit is completed in the factory to reduce the installation and debugging time;

3. 一级反渗透和二级反渗透设有回流管道，反渗透设备设有化学清洗装置；

3. The primary RO and secondary ro are equipped with return pipes, and the RO equipment is equipped with chemical cleaning device;

4. 管道一般采用UPVC材质；

4. UPVC material is generally used for pipes;

5. 集成控制系统和集成仪表系统等，方便操作管理；

5. Integrated control system and instrument system to facilitate operation and management;

6. RO膜定时清洗 具有开机和定时清洗RO膜功能，延长RO膜使用寿命

6. Timing cleaning of RO membrane has the function of starting up and timing cleaning of RO membrane to prolong the service life of RO membrane