MVR evaporation concentration and crystallization system

working principle

Forced circulation evaporation concentration and crystallization: After being preheated by the non condensable gas preheater and the condensate preheater, the feed liquid enters the heating tube from the bottom of the evaporator with the circulating liquid and is heated by the shell side steam. Under the action of the circulating pump, it flows upward along the heating tube and enters the separator for evaporation, achieving gas-liquid separation. The concentrated liquid is discharged from below the separator, and the material liquid that has not reached the concentration enters the evaporator for further circulation. The material liquid that has reached the concentration is discharged from the system; The secondary steam enters the steam compressor from the top of the separator for compression, increasing temperature and enthalpy, and then enters the evaporator shell side as a heat source to heat the feed liquid. The condensed water and non condensable gas generated are discharged from the system after heat exchange with the feed liquid through the preheater.

Comparison of energy consumption between MVR system and traditional evaporator

Analysis of the Advantages of MVR System

1. Less land area and fewer supporting equipment for public works.

The MVR system eliminates peripheral supporting equipment such as boilers, pipelines, and cooling towers, with a compact structural layout and a footprint of only 50% of traditional evaporators.

2. Reduce the probability of pipe blockage.

Traditional evaporation systems are mostly multi effect evaporation, with a large temperature span before and after, and the residence time of the liquid in the system pipeline is relatively long, which can easily cause pipe blockage; The MVR system has a compact structure, short material flow, low heating temperature, and small heat exchange temperature difference, which greatly reduces the probability of pipe blockage.

3. Suitable for evaporative crystallization of thermosensitive materials.

MVR evaporation technology can achieve low-temperature evaporation at around 40 ℃, ensuring the quality of crystalline materials that are prone to denaturation at high temperatures.

4. Easy to operate.

Compared to traditional multi effect evaporation systems, MVR systems require fewer equipment and control points, allowing for unmanned and fully automatic control.

5. Cleaning

The MVR system is easy to clean, and a cleaning system can be added during design and construction to flush and clean the system during shutdown.

Our company's advantages in MVR system engineering

1. System core equipment with independent research and development, design, and manufacturing capabilities

⑴ Core equipment "steam compressor".

The core equipment of MVR system, single-stage high-speed centrifugal steam compressor and Roots steam compressor, is developed by our company based on the introduction of technology, combined with the characteristics of MVR system use and years of production and manufacturing experience. The product design is based on our company's years of thermodynamic calculation experience and research results in aerodynamics. It adopts a special impeller profile, high-temperature resistant structural design, dedicated and reliable sealing structure, and anti-corrosion measures corresponding to different liquid and material working conditions, ensuring the stable and reliable operation of the steam compressor in the MVR system.

Based on the physical properties of the liquid, the size of the evaporation rate, and the experimental data, we will select the appropriate type of steam compressor for you to apply to the MVR system while ensuring the standardization of the plan.

B-series single-stage high-speed centrifugal steam compressor

Main features of the product:

1. The impeller profile is advanced and efficient, with a single machine saturation temperature rise of up to 20 ℃;

2. Wide flow regulation range, suitable for various working conditions;

3. The compressor has a compact structure and small volume;

4. The equipment has low vibration, high reliability, and overall low noise;

5. The compressor structure is advanced and reasonable, with few vulnerable parts, and easy installation, operation, and maintenance.

V-series Roots steam compressor

Main features of the product:

1. The coverage of air volume and pressure ratio is large, and the product has a wide range of applications

2. The compressor adopts frequency conversion control mode;

3. The impeller adopts a new type of wire, with good sealing performance, high efficiency and energy saving, and a single machine saturation temperature rise of up to 25 ℃;

4. Structurally separating the air chamber from the oil chamber ensures that lubricating oil and water vapor do not mix during operation;

5. The shaft seal adopts a dedicated double end mechanical seal form;

6. Years of design experience, rigorous calculations, and high-precision production processing ensure the clearance between the two impellers inside the casing during high-temperature operation, as well as the reliability and stability of the overall operation of the compressor.

(2) Water ring vacuum pump

In MVR system engineering, our company mainly uses water ring pumps of the LRA and LRC series. The LRA (C) series water ring pump is a product developed by our company based on advanced technology of imported products. This product is not only efficient and energy-saving, but also very suitable for long-term, continuous operation. This series of pumps adopts a single-stage structural form, which has the advantages of simple structure, easy maintenance, reliable operation, high efficiency and energy saving.

(3) Electrical equipment and automatic control system

The company has tailor-made an automatic control system for each MVR system, which has the characteristics of high degree of automation, smooth start-up and operation, fast interlocking response speed, high efficiency and energy saving, and easy maintenance; It is mainly composed of PLC programmable controller, upper computer, frequency converter, various sensors and instruments, and various execution mechanisms. It can real-time detect the operation of the system online, and has functions such as automatic interlocking control, overload protection, short circuit protection, over limit alarm, and shutdown.

2. Collaborate with qualified professional construction and installation teams

Our company has long-term cooperation with professional construction teams with qualifications in framework, electromechanical equipment, and electrical installation engineering. This lays the foundation for the high standard and efficient completion of project framework construction, while ensuring the robustness of the engineering framework, the safety of electrical equipment operation and personnel operation, and the stability of system operation.

3. A nationwide network and efficient after-sales service

The company provides professional training and guidance on debugging for all clients of MVR engineering projects. There are more than 50 sales offices and service outlets nationwide, and more than ten agents abroad, which can provide timely pre-sales, sales, and after-sales services for users, so that you can use Shandong Zhanggu's products without any worries, ensuring the continuous and smooth operation of the system and the interests of customers.