MVR Steam Compressor Manufacturer Shares the Energy Consumption and Energy-Saving Principles of MVR Evaporators
Release date:
2022-05-20
MVR evaporators, short for mechanical vapor recompression evaporators, are devices that offer higher efficiency and lower energy consumption compared to conventional multi-effect evaporators. With superior energy-saving performance, MVR evaporators are widely used in the industrial wastewater treatment industry. In the following article, an MVR steam compressor manufacturer shares insights into the energy consumption and energy-saving principles of MVR evaporators.
MVR evaporators, short for mechanical vapor recompression evaporators, are devices that offer higher efficiency and lower energy consumption compared to conventional multi-effect evaporators. With their superior energy-saving performance, MVR evaporators are widely used in the industrial wastewater treatment industry. The following text... MVR steam compressor The manufacturer shares the energy consumption and energy-saving principles of MVR evaporators.
I. The MVR steam compressor manufacturer explains the principle of the MVR evaporator.
The theoretical basis of MVR is Boyle's Law. This means that PV/T = K, where the product of pressure and volume divided by temperature remains constant for a given mass of gas. Consequently, if the volume of a gas decreases, its pressure increases, and its temperature also rises.
The principle of an MVR evaporator is that after the dilute secondary steam is compressed, its volume decreases and its temperature rises, thereby converting low-temperature, low-pressure steam into high-temperature, high-pressure steam. This steam then re-heats the feed liquid that needs to be evaporated back to the heat source, thus achieving the purpose of steam recovery. This compression of volume is accomplished by a mechanical compressor, which is why it’s called MVR.
II. MVR steam compressor Manufacturer Analysis of MVR Evaporator Energy Consumption
Mechanical Vapor Recompression (MVR) evaporators feature higher energy efficiency, a smaller footprint, lower operating costs, fewer associated engineering requirements, a high degree of automation, simple operation, and stable performance compared to conventional evaporators.
The energy consumption of an MVR evaporator is approximately 15 kW/h to 55 kW/h per ton of water evaporated. The product has a short residence time and operates at low temperatures, resulting in minimal impact on product quality.
Assuming that both the MVR evaporator and the multi-effect evaporator are operating at the same evaporation rate of 10 tons per hour, let's compare their energy consumption when evaporating 1 ton of industrial saline wastewater. Taking the triple-effect evaporator as an example, evaporating 1 ton of water costs 92 yuan.
An MVR evaporator typically costs 80 RMB to evaporate 1 ton of water. Based on 24 hours per day and 330 days per year, the annual operating cost of an MVR evaporator is less than 3.3 million RMB.
Based on the comparison data of energy consumption between the MVR evaporator and the multi-effect evaporator mentioned above, the MVR evaporator demonstrates a relatively favorable energy-saving performance among current evaporator types. So, what is the underlying principle behind the energy savings of the MVR evaporator?
III. MVR Steam Compressor Manufacturers Share the Energy-Saving Principles of MVR Evaporators
The energy-saving principle of the MVR evaporator, based on its operating mechanism, lies in the use of a steam compressor. By replacing fresh steam with electric heating, the system consumes less electricity. The secondary steam generated during evaporation is compressed and fully utilized, resulting in virtually no steam loss throughout the entire evaporation system. The heat from the condensate and concentrated liquid is exchanged with the feed liquid, while non-condensable gases are also exchanged with the feed liquid. The compressor motor employs variable-speed control.
The energy savings of an MVR evaporator depend on comparing the price of steam with the cost of electricity used. The electricity consumption is directly related to the models of equipment in the system, including the selected motors, compressors, centrifuges, and so forth. Starting from the operating principle of the MVR evaporator, MVR steam compressor The manufacturer explains the energy consumption of MVR evaporators and the energy-saving principles behind them, hoping to provide useful guidance on MVR evaporator energy consumption and selection.
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