Membrane Concentration Technology
Instruction:
Membrane concentration technology is a concentration method based on membrane separation technology. Its core is the selective retention of target substances (e.g., proteins, sugars, salts, etc.) in the concentrate through the membrane’s.
The core of membrane concentration is the selective retention of target substances (e.g. proteins, sugars, salts, etc.) in the concentrate, while allowing solvents (e.g. water) or small molecules to pass through, thus achieving the purpose of concentration and purification. In accordance with the membrane filtration pore size difference, the commonly used membrane technology can be divided into microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), reverse osmosis (RO) and so on.
According to the filtration pressure and the final concentration multiplier to distinguish.
To achieve zero discharge of highly concentrated wastewater demand plan, first of all, generally after physical or chemical pre-treatment, complete the removal of suspended solids, colloids and common easy to scale ions, and then through the membrane treatment process to complete the reuse of fresh water, while achieving the purpose of wastewater reduction, and the final concentrate through the evaporation of the product and other processes to achieve the final degree of zero discharge of water purposes.
Application：
Membrane concentration equipment is widely used in food processing, medicine and biotechnology, landfill leachate treatment, industrial wastewater zero discharge and other fields.
Treatment Process Flow:
Mechanical Vapor Recompression (MVR) Evaporator
Instruction：
MVR (Mechanical Vapor Re-compression) refers to the process of using a compressor to compress the secondary vapor generated during evaporation (such as distillation), which is low-temperature and low-pressure and otherwise unusable. By increasing its temperature and pressure, this vapor is reused as a heat source to heat the material that needs to be evaporated, thus achieving the purpose of recycling vapor.
Feature：
- 100% recycling of latent heat of secondary steam, completely avoiding the use of fresh steam, thus greatly reducing energy consumption
- The cancellation of the circulating cooling water, greatly reducing the cooling tower due to water consumption, power consumption, high maintenance costs of the problem
- For heat-sensitive materials can be used with a vacuum pump, can be done in a vacuum close to the absolute pressure, so as to achieve low-temperature evaporation, the lowest can reach 30 ° evaporation
- Compact structure, smooth operation, high degree of automation
- Initial investment is higher, but most of the project return on investment is also high, generally in 1.5 years to 2 years, up to 3 years
- Not suitable for brine solution boiling point rise particularly high materials (such as calcium chloride, magnesium chloride, caustic soda, etc.)
Treatment Process Flow:
Multi-effect evaporator
Instruction：
Multi-effect evaporator is the heat transfer process, is more than one evaporator running in series evaporation operation, is the former effect of the secondary steam as the next effect of the heating steam of the tandem evaporation, so that the steam heat energy to be used many times, so as to improve the utilization rate of heat energy, multi-effect evaporation is mostly used in the treatment of aqueous solutions, is the process of boiling and condensation heat transfer. In the multi-effect evaporation, the operating pressure of each effect, the corresponding heating steam temperature and the boiling point of the solution is reduced once.
Feature：
- Wide application, strong applicability, especially for high salt, high COD difficult to deal with the class of wastewater
- Suitable for brine solution boiling point rise particularly high materials (such as calcium chloride, caustic soda, etc.)
- Operation flexibility, special adjustment range is large
- The need to continuously provide higher pressure of fresh heating steam
- The secondary steam from each effect needs condensation system condensation, requiring a large amount of cooling water circulation volume
Treatment Process Flow:
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