4 Types of Myande Energy-Saving Evaporation Technology

Myande energy-saving technology consists of Mechanical Vapor Recompression Technology (MVR), Waste Heat Recycling Technology, Thermal Vapor Recompression Technology (TVR) and Thermal Energy Classification Utilization Technology.

1. Mechanical Vapor Recompression Technology (MVR)

Principle

MVR evaporation system utilizes secondary steam generated from the evaporator, which is compressed to increase its temperature and enthalpy value and then transferred to the heater of the evaporator to replace vast majority of fresh steam required by the evaporation system as heating steam. With Myande MVR technology, fresh steam is only used as supplement for heat loss. In this way, the normally abandoned spent steam is recycled and utilized to improve thermal efficiency of the complete evaporation system. In short, Myande MVR technology reduces the demand of external heating and cooling resources and energy consumption and pollution. 

Features

MVR evaporation system is a new type of high efficiency and energy-saving system. It uses low-temperature, low-pressure steam and clean energy to produce steam and separate water from medium. The MVR evaporation system is currently the most advanced technology that replaces traditional evaporation system. Compared with traditional evaporation system which uses fresh steam to evaporate, Myande MVR technology reduces power consumption and overall running cost, although the initial investment is higher than that for the traditional evaporator. While actual savings in terms of money may vary with the price of fresh steam and electricity at different regions, MVR evaporators can recover the added investment in one to two years.

Advantages

Rich experience. Myande has rich experience in MVR application. Myande MVR evaporator is capable of coupling with different types of evaporation crystallizer and continuous the evaporation crystallization operation. Moreover, Myande professional 3D design provides three-dimensional model of the project before construction to ensure accurate and efficient project construction process. Fully automatic control. According to the demand of the customer, Myande provides each client with customized fully automatic, semi-automatic or manual control system. Myande MVR system, when equipped with automatic control system, is capable of one-button start-stop operation and fully automatic cleaning process. It requires no manual operation on site.

Reasonable process design. Due to the complexity of material composition, each MVR evaporation system is different. Myande requests every customer to provide the material sample for test, and then according to the material composition to determine the evaporation technology.

Myande has professional test equipment, detailed analysis of each material sample, ensure the evaporation data is detailed and correctly, make sure each set of evaporator is customized for the customer. Bring customers the best of MVR evaporation system in energy conservation.

Applications

MVR evaporation system as a highly efficient energy-saving solution can be integrated into a variety of traditional evaporation applications and is widely used in evaporation and concentration of corn steep liquor in starch industry, liquid cream in dairy industry, syrup in sugar industry and wastewater in all kinds of chemical industry, and other various industries. Myande mechanical vapor recompression techniques have been successfully applied to multiple projects. One of the most representative success stories is Pengcheng biochemical 80TPH MVR corn steep liquor evaporation project in Qiqihaer. This project is currently the largest MVR falling-film evaporation system in China, and the MVR technology eliminates the need for steam in operation. The only energy requirement is electricity. The picture below shows Pengcheng biochemical 80TPH MVR evaporation system built by Myande in Qiqihaer.

2. Waste Heat Recycling Technology

Principle

Waste heat recycling technology is meant to save energy for evaporation applications by recycling and utilizing exhaust heat generated in the factory as a heating medium.

Features

Waste heat recycling technology maximizes energy efficiency by fully recycling using waste heat generated in the factory. This set of evaporation system is an economical and efficient energy-saving solution and almost need no additional heat source supply.

Advantages

Unstable temperature and supply of heat source pose rigid requirements to evaporation systems in general. Any mistakes in design may cause scaling inside the heating tubes. Myande evaporation system adopts optimized top film-distributor for strengthening liquid film inside tubes. This technology ensures stable evaporation process and prevents scaling inside the tubes. Myande’s world-class manufacture facilities ensure verticality of tubes in the heater. This in turn ensures even liquid film and helps to prevent scaling. Myande’s advanced process technology ensures accuracy of all operational parameters and minimized feeding rate.

Applications

Waste heat recycling technology is widely used in various industries where a large amount of waste heat is generated. One typical application is the recovery and use of the hot and steady exhaust heat from tube bundle dryers as heat source to evaporate thin corn steeping liquid in corn starch processing plants. The picture below is the waste heat falling-film evaporation system we have contracted to build.

3. Thermal Vapor Recompression Technology (TVR)

Principle

MyandeTVR evaporation system is designed to save energy via thermal vapor compression technology. It utilizes the secondary steam generated by high-speed steam flowing through a vapor pump as a heat source to heat liquid material. The liquid-gas mixture then enters separation for liquid-gas separation. The secondary steam is further used as heat source in the subsequent evaporation unit.

Features

The jet pump of the TVR evaporator has no moving parts and not prone to wear and tear. This feature ensures maximum reliability in operation. By using the jet pump, the savings on steam is roughly equivalent to the amount of steam needed by an extra effect evaporator. Evaporation application incorporating TVR effectively reduces the amount of evaporation in the last effect and saves cooling water.

Advantages

TVR technology as an improvement of the traditional evaporation system requires full understanding and experience of evaporation technology. Myande, with rich experience in TVR evaporation system, has built numerous TVR projects, including Hebei Jianmin 14TPH TVR evaporation project, Hebei Derui 12TPH TVR evaporation project and Iran 35TPH TVR evaporation project.

Applications

TVR technology is widely used in various types of evaporation systems and is suitable for processing a variety of materials. One widely used application is in combination with the multiple effect evaporation systems, in which fresh steam passes through the vapor pump before entering the evaporators. The vapor pump injects a part of secondary steam from the first effect separator to continue heating the first effect evaporator.

The other feature of TVR technology is the evaporation capacity is focused on the previous effect and can effectively reduce the quantity of the secondary steam at the last effect, this is not only can reduce the amount of circulation condensate, but also can reduce the waste gas emissions, it very conforms to our aim of energy saving and emission reduction.

4. Thermal Energy Classification Utilization Technology

Principles

The most common application of thermal energy classification utilization technology is multiple-effect evaporation system. In this application, liquid is fed from top of falling-film evaporator. The liquid is evenly distributed in each heat exchange tube by the liquid distributor, flows from top to bottom under the effect of gravity and vacuum induction and airflow.

The liquid is heated and vaporized by the heating medium in the on the shell during as it flows down. The liquid and generated vapor enter the separation chamber of evaporator together. Vapor enters the next effect and works as evaporation medium after vapor liquid separation to realize multiple-effect operation and take full advantage of thermal.

The traditional one-effect evaporator evaporates 1 ton water with 1 ton vapor. However, multiple-effect operation system can evaporate several tons water with 1 ton vapor. The more effects are, the better the thermal utilization will be.

Features

This system has large concentration ratio, wide range of viscosity, good heat transmission effect, large handling capacity and short staying time of the material. In addition, it ensures proper boiling state of material inside heat exchange tube and avoids scaling.

Applications

The multi-effect evaporation system is suitable for evaporation of heat-sensitive, high concentration, large viscosity and corrosive materials, such as evaporation and concentration of corn steep liquor in starch industry, liquid cream in dairy industry, syrup in sugar industry and wastewater in all kinds of chemical industries.

Myande has built different types of evaporation projects, like Shandong Dazong 20TPH corn steep liquor evaporation project, Anhui Pinqing 20TPH fructose evaporation project. We have dealt with multiple types of material evaporation projects and gained a wealth of experience. The picture below shows a 40TPH wastewater treatment system built by Myande.