Myande Undertakes Pesticide Waste Water Evaporation & Crystallization Project

On September 7th, 2016, Myande signed a contract with Dezhou Luba Fine Chemical Co., Ltd, by which Myande will supply Luba with a three-effect evaporation & crystallization facility to process all waste water generated from Luba’s pesticide production plant to yield 3,000 ton per annum industrial refined salt as value-adding by-product.

This evaporation & crystallization facility to be supplied by Myande will enable Luba to extract salt content from the waste water and achieve zero-effluent effect by recycling all condensation water from the evaporation and crystallization process.

This project will represent another major breakthrough of Myande’s wastewater treatment technology particularly developed for treating wastewater generated in pesticide production plants.

Pesticide Waste Water Evaporation & Crystallization

Tips of MVR Technology in High-salt Wastewater Treatment

In wastewater treatment industry, mechanical vapor recompression evaporation technology (MVR for short) aims to reduce environmental impact and reduce energy consumption by recycling and reuse of secondary steam generated by evaporators. The working principle of MVR in this application is that secondary steam from evaporators is compressed to increase its temperature and pressure. The pressed steam then enters the heating chamber and functions as the heating steam. After the material absorbs the heat, the generated secondary heat will be recycled and reused again as heat source for further evaporation cycle. Thus it reduces consumption of steam in the complete evaporation system and fresh steam is only required for starting up the evaporators.

At present, MVR evaporator is widely used in various fields, including evaporation and concentration of fruit juice, corn syrup, pharmaceuticals and other processes. Myande has successfully applied MVR to achieve zero-affluent result in treating non-organic wastewater with high concentration of salt as well as organic waste water.

In recent years, development of biochemical technology and successful separation, cultivation and treatment of halotolerant and halophilic bacteria have made it possible to treat industrial wastewater containing salt by biochemical methods. However, halotolerant and halophilic bacteria have high requirements for the ambient conditions and can deal with wastewater with limited salt content. The running cost is also high. MVR evaporation technology on the other hand can not only reduce COD figure in wastewater with high salt content but also separate the soluble salts from the industrial wastewater so that the water can be recycled.

MVR Evaporation System

How about Myande (Mechanical Vapor Recompression) MVR Evaporation Technology?

(Mechanical Vapor Recompression) MVR evaporator is a new type of high efficiency and energy saving evaporation equipment that uses clean electric energy as the main energy. It represent the world's most advanced evaporation technology and has obvious and advantage over traditional kettle type and multi-effect evaporators.

Technical advantages of MVR evaporator:
1) Energy saving. MVR does not emit waste heat and spent steam and thus has significant energy saving benefit.
2) Environmental protection. MVR needs minimized or no live steam and doesn’t require boiler.
3) Stable operation. MVR typically have high degree of automation.
4) MVR requires less public facilities and takes smaller area.
5) Simple structure, low operating cost, mild evaporation.

Applications:
1) Seawater desalination
At present, the main methods of seawater desalination are reverse osmosis and distillation. The distillation method mainly includes multi-stage flash, low-temperature multi-effect distillation and pressure steam distillation technology. According to various comparative studies MVR heat pump circulating system is the most energy-saving solution for seawater desalination system. 
2) Salt production. 
In China, multiple-effect evaporation facilities are widely used in salt production process while in Europe MVR salt producing method is more widely applied. The MVR salt making technology can effectively reduce energy consumption in this era with increasing cost of energy.
3) Wastewater treatment. 
In chemical, chemical fertilizer, pesticide, textile and some other industries, waste water usually contains a large number of non-organic salts, such as sodium chloride and sodium sulfate, etc. If the high-salt wastewater is discharged directly without treatment, it will not only pollute environment but also cause the soil salinization. At present, wastewater treatment methods include physical and chemical filtration, MVR evaporation and concentration, multiple-effect evaporation, membrane purification and so on. Compared with other methods, MVR evaporation and concentration has obvious advantages in terms of lower energy consumption and reduced running cost.

How to Apply Evaporation and Crystallization Technology to Salt-Rich Waste Water Industry?

On September 18, 2015, Myande signed a contract with Jiangsu Xinnong Chemical Co., LTD. According to the contract, Myande will build for Xinnong Chemical Co. an evaporation & crystallization facility to treat its waste water that contains high proportion of inorganic salt generated in the process of producing pesticides and chemical intermediates. The new facility will enable Xinnong Chemical Co. to dramatically improve its environmental performance by crystallizing sodium chloride, sodium sulfate and other inorganic salt contained in the waste water and recycling the condensation water.
Jiangsu Xinnong Chemical Co., LTD. has focused on producing high-tech pesticides and pharmaceutical intermediate products for many years with wide industrial recognition. With continuous development, the treatment of waste-water generated in the production process has become an impasse in its further development.
Waste water generated from production of pesticides is complicated and is highly toxic with infamous impact on environment. Xinnong Chemical Co.’s waste water contains toxic substances such as phenol, arsenic, mercury, and other substance, which are hard to be degraded. Furthermore, the waste-water is malodorous with unstable water quality and yield. Thus, waste water has created a chronic headache to Xinnong Chemical Co. 
Having learned about the problem facing Xinnong, Myande engineers conduct repeated experiment with the waste-water, tested its physical properties, and conducted comprehensive feasibility study with sufficient attention paid to critical control points in the evaporation process. Particular engineering efforts were made to make sure the condensate can reach the recycling requirements. In the end, according to the analysis of experimental results with full consideration of the actual situation of Xinnong Chemicals, Myande has offered an energy-saving and eco-friendly evaporation crystallization system technology scheme, which won full approval of Xinnong Chemicals.

How about MVR Falling Film Concentration and Evaporation Technology from Myande?

Recently Myande Group Co., Ltd and Fujian Jinmin Reconstituted Tobacco Development Co., Ltd signed a contract by which Myande will supply a MVR falling film concentration & evaporation facility for concentration of tobacco stem extracted solution.

Tobacco stem extracted solution evaporation and concentration technology has long been monopolized by foreign companies. In the competitive bidding process for this project, Myande with its advanced technology and comprehensive cost-effective process technology outscore al other competing bidders and finally won the contract. The signing of this project indicates that Myande has successfully extended into tobacco concentration business with world-class technology.

Tobacco Stem

Fujian Jinmin Reconstituted Tobacco Development Co., Ltd is directly subsidiary of China Tobacco (Fujian) and one of the key producers of leave tobacco (Chinese style cigarette leaves). As the market development and product constant innovation, its existing production capacity cannot meet the production requirement and it is urgent to add a new production line for the new products.

Paper-making mode of reconstituted tobacco production aims to fully reuse useful components of tobacco stem and powder to reduce tar concentration of cigarettes and harm to the human body so as to improve inherent quality of cigarette. In the production process, the quality of extracted solution from tobacco stem and powder directly affects the quality of final products. Therefore, it poses high requirements for MVR evaporation and concentration system according to national health standards. Another critical requirement is optimal preservation of effective element of the condensed liquid so as to enhance the aromatic feature of tobacco.

This project is not only an opportunity to Myande, but also a challenge. In the rapid development of energy-efficient evaporation field, Myande is accumulating experience and technical reserves, having deep research in low-temperature evaporation and concentration technology. In order to ensure the integrity of the project process, Myande have conducted experimental analysis for many times according to client’s technical requirements and strictly design as the experiment result. Considering the protection of effective components in the extracting solution, the design adopting low-temperature evaporation, this design on the one hand is effective use of heat source and saving the cost of investment, on the other hand to avoid circulating evaporate the concentrate and greatly preserved the effective components.

Tobacco Stem Extracted Solution MVR Evaporating System

Latest Technology Applied on Ethanol Wastewater Rectification & Recovery

Recently, Myande Group signed a contract with Hubei Daya Biological Technologies Co., Ltd, by which Myande will supply Daya with a 2t/h wastewater rectification & recovery facility for recovery of methanol, ethanol and water. Based on numerous previous cooperative projects, Hubei Daya has full trust in the Myande’s comprehensive capabilities in process design, equipment manufacture, and project management. This trust forms a solid foundation for further cooperation.

Hubei Daya Biological Technologies Co., Ltd is a national high-tech enterprise focusing on research and development of biochemical process technology, production management, and applications of new product technology. Its major products are various types of fine biological chemicals and biological bacteria products. As market fame and high quality service have enabled Dayu to grow steadily, its production line needs to be expanded. With its recent expansion of cellulose production line, the amount of waste water increases. As its wastewater contains methanol, ethanol and water, it becomes economically feasible and beneficial to construct a rectification facility for recovery of methanol and methanol.

Tips of MVR Technology Applied to Waste Water Evaporation and Crystallization

On June 7, 2016, Myande Group Co., Ltd. and Jiangsu Youjia Plant Protection Co., Ltd. (hereinafter referred to as "Jiangsu Youjia") signed a contract by which Myande will supply Youjia with two MVR wastewater evaporation and crystallization facilities for treatment and resourcelization of wastewater generated in the process of producing alicylic acid, dicamba, and other pesticide intermediates. When installed, these two facilities will enable Youjia to recover industrial grade sodium chloride and potassium chloride from the wastewater through evaporation and crystallization processes. The wastewater after evaporation will be recycled as process water used in the production process. Major features of these evaporation facilities will include high level of automation, minimized energy consumption, and zero wastewater emission.