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Henan Zhonglan Environmental Protection Engineering Co., Ltd. specializes in: integrated water purification equipment, groundwater defluorination equipment, well water iron and manganese removal equipment, ultrapure water equipment, valveless filters, pure water equipment, water purification equipment, sewage treatment equipment, Reverse osmosis equipment; environmental protection engineering, construction mechanical and electrical installation engineering construction; sales of water treatment equipment accessories and consumables, laboratory instruments, teaching equipment, telephone 18838160815.
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  • Complete set of urea water purification water equipment zl-nsy001

    Source: Water purification equipment of urea solution: the Blue Time: 2015-09-18 Views: Times

    Complete set of urea solution purified water equipment for vehicles

    Complete set of urea solution purified water equipment for vehicles

    Device parameters:
    Name: Complete set of urea solution purified water equipment for vehicles
    Model: zl-nsy001
    Operating pressure: 15.5 (Mpa)
    Water resistivity: 16 megohm / cm Water output: 1.0m3 / H
    Dimensions: 200 * 100 (cm)
    Voltage: 280 (V)
    Water quality: ultrapure water power: 12250 (w)
    Conductivity: 0.0625us / cm
    Desalination rate: 99.8 (%)
    Single machine output: 1.0m3 (/ h)
    Overview:
    Urea is a special exhaust gas purification reducing agent for diesel engines. It is an odorless, non-toxic solution that is stored in special storage containers on diesel vehicles. When the exhaust gas is discharged from the engine, it will reach the SCR catalytic converter together with the exhaust gas, and then convert nitrogen oxides into harmless nitrogen and water, thereby greatly reducing exhaust emissions. Urea is generally called Adblue or DEF in foreign countries. Diesel vehicles equipped with Adblue have a separate container for storage. At present, SCR (Selective Catalytic Reduction Technology) technology has become the preferred technology for diesel country IV standards. Domestic engine manufacturers have begun to use SCR technology to meet environmental requirements.
    Automobile urea (vehicle urea, automobile environmentally friendly urea) refers to an aqueous urea solution with a urea concentration of 32.5% and a solvent of ultrapure water. The raw materials are urea crystals and ultrapure water. The key point is the purity of the raw materials. Its scientific name is diesel exhaust treatment fluid, which is used in diesel engines. It is a consumable that must be used in SCR technology to reduce nitrogen oxide pollution in diesel vehicle exhaust. Its composition is 32.5 % High purity urea and 67.5% deionized water.
    For diesel trucks such as heavy-duty trucks and buses to meet the national IV emission standards, a suitable SCR system must be selected for exhaust gas treatment, and this system must use a urea solution to treat nitrogen oxides in the exhaust gas. Therefore, the urea solution for vehicles has become an indispensable product for heavy trucks and buses to meet the national IV emission standards.
    At present, the current national GB19147-2009 standard for diesel requires sulfur content ≤350ppm, while ECR-DOC technology requires that the sulfur content of oil products be less than 10ppm, so there is no promotion condition in China for the time being. SCR is resistant to 350ppm sulfur oil, so it has a technical basis for promotion. Because the fuel economy of National IV engines using SCR technology is better than that of EGR technology, the engine changes are small, the fuel and oil requirements are lower, the technology upgrade has continuity advantages, the SCR catalyst has good durability, and there is no catalyst blockage. Therefore, SCR technology is the most suitable heavy-duty diesel vehicle emission reduction technology route in China.

    Complete set of urea water purification water equipment

    Complete set of urea solution purified water equipment

    如下。 The requirements for the purity of raw materials for automotive urea are higher than those for general industrial use, which are mainly purified from industrial urea. The main principle is as follows.
    1. At a temperature of 70-75 C, urea is hydrolyzed in an aqueous solution.
    2. When the temperature is below 30 C, urea is recrystallized from the aqueous solution.
    3. Every time hydrolysis and crystallization, the purity will be greatly improved. Generally, the first-grade urea hydrolysis and crystallization can be used to meet the automotive urea standard requirements, and the output ratio is 1.5: 1.
    Formulation equipment:
    1. Urea purification Due to the higher purity requirements of vehicle urea, industrial urea (impurity content is lower than that of agricultural urea) is generally used for purification. Urea is hydrolyzed in aqueous solution at 70-75 C, and urea is returned from aqueous solution below 30 C The medium crystallizes, and the hydrolysis and crystallization can greatly improve the purity of urea. Generally, the industrial-grade urea hydrolysis and crystallization can reach the urea standard for automobiles.
    2. Urea for water treatment vehicles requires strict control of impurities. Ordinary tap water or deep groundwater is used to filter pure water through reverse osmosis equipment for the preparation of urea solution for vehicles.
    3. Configure urea solution for vehicles. The urea content in vehicle urea solutions is generally 31.8% ~ 33.2%. The final step in the production of urea for vehicles is to mix and dissolve purified water and purified urea before filling.

    Complete set of urea solution purified water equipment

    Complete set of urea solution purified water equipment

    Production process:
    The scientific name of automobile urea (vehicle urea, automobile environmentally friendly urea) is diesel exhaust gas treatment fluid. Used in diesel engines. It is a consumable that must be used in SCR technology to reduce nitrogen oxide pollution in diesel vehicle exhaust. Its composition is 32.5% high-purity urea and 67.5% deionized water.
    1.Water system process raw water → raw water tank → booster pump → sand filter → activated carbon filter → scale inhibitor dosing → 5 μ precision filter → first-stage high-pressure pump → first-stage membrane treatment system → first-stage RO water tank → two High-pressure pump → secondary membrane treatment system → secondary RO water tank → RO water tank → EDI inlet pump → EDI device → pure water tank → pure water pump → mixing tank 2. Urea production process

    Vehicle urea production process.png


    System specification:
    This production line consists of a pre-mixing system, a primary filtration system, a homogenization system, a decolorization system, and a purification system. This operation mode is currently an advanced and mature automotive urea production process in China and has entered a large-scale industrial production stage. Such production methods and concepts have been produced and operated by Sinopec, Klansu, Yuchai, Hubei Tuowei Automobile Exhaust and other companies;
    (1). Primary filtration and decolorization system: remove suspended matter and other floating impurities in urea to ensure that subsequent processes are not affected. The decolorization system uses high-quality activated carbon for adsorption and decolorization, removes other organic impurities in urea, and makes the urea solution more clear.
    (2). Fine filtration system: prevent the activated carbon particles in the decolorization system from entering the subsequent processing steps, affecting the quality of the subsequent products.
    (3). Purification system: Multi-stage purification tower method is used to remove various ions, biuret, phosphate and other impurities in the urea solution to ensure that the product meets the technical specifications of the Chinese Society of Automotive Engineers SAE-China J2901-2013 "Urea solution technical specifications" standard requirements.
    (4). Microfiltration system: intercepting some invisible residual impurities that may be generated by pipes, storage tanks, power equipment, etc. during the production process to ensure the quality of the finished product is stable and reliable.
    (5). Reduction and regeneration system: The purification tower gradually fails during the process production process. Reduction and regeneration treatment is required to reach a certain period, and the process takes 6-8 hours. The reused purification tower after reduction and regeneration can fully meet the requirements of the original production process. 2 tons of wastewater will be generated during each regeneration cycle. The wastewater does not contain other heavy metals, mainly because the PH value does not meet the requirements. After neutralization and adjustment, environmental protection emission standards can be achieved.
    车用尿素生产线符合中国汽车工程学会技术规范SAE-China J2901-2013《车用尿素溶液技术规范》标准要求。 Product quality and design standards: The urea production line for vehicles meets the technical requirements of the Chinese Automotive Engineering Society Technical Specification SAE-China J2901-2013 "Technical Specifications for Automotive Urea Solutions".

    Complete set of urea solution purified water equipment

    Complete set of urea solution purified water equipment

    Because the SCR catalyst carrier is prone to metal ion poisoning and loses its catalytic effect, the urea solution for vehicles must use ultra pure water of the electronics industry. The urea solution for vehicles will begin to freeze at -11 C. In actual use, it will completely freeze at -20 C. The current technology is to prevent the solution from solidifying by adding modifiers to lower the freezing point of the solution and adding a heating device.

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