Editor's noteMixed wastewater in chemical parks has the characteristics of complex water composition, wide variety of pollutants and difficult biodegradation, which may be toxic to microorganisms even after pretreatment, and the process parameters are difficult to control, resulting in unstable centralized treatment effect. Under the new environmental protection policy, it is urgent and imperative to form a cost-effective and applicable mixed wastewater treatment and reuse technology in chemical parks as soon as possible.
Introduction to technology and innovation
Introduction to low-temperature heat pump evaporation technology
Low-temperature heat pump evaporation technology is specifically used for evaporator concentration. It is especially recommended for the treatment of water from a wide range of polluted wastewater or oily products, especially from cutting fluids, cleaning, surface treatment, high salt wastewater, flaw detection and testing wastewater, or other process water.
Innovation points of low-temperature heat pump evaporation technology:
Evaporation at room temperature, not easy to produce scale;
The high-efficiency vacuum jet system designed by painstaking experiments has continuous water output, low maintenance cost and low noise;
Steam filtration system, built-in steam purification filter element (vacuum tank ** filtration), can remove more than 99% of free organic matter and free water, the effluent heavy metal is zero, the effluent COD is 70% higher than the traditional low-temperature evaporator before the iteration, and the effluent water quality is better and more transparent;
Fully immersed coil heat exchanger, professional welding equipment for pipe welding, circulating pump can be spiral cleaning;
The equipment is simple to operate, the user-friendly operation interface, and the guided design (parameter setting, troubleshooting, maintenance reminder, etc.) can be completed by the operator only by step-by-step operation;
The Alibaba Cloud platform APP monitoring program can be installed on the user's mobile phone and computer, which is easy to use and has no operation threshold;
Wasenda patented vacuum tank structure.
Introduction to low-temperature evaporation and crystallization drying technology
The low-temperature evaporation crystallization drying technology is specially used for the aqueous solution concentrated by the evaporator, and the built-in spiral stirring system can treat the concentrated solution that is easy to stick to the wall. It is especially recommended for the treatment of adhesive or crystallized fluids, such as high-concentration oily wastewater, heavy metal wastewater, printing industry wastewater, high-salt water, brackish water, reverse osmosis concentrated liquid, etc.
Innovation point of low-temperature evaporation crystallization and drying technology:
Evaporation at room temperature, not easy to produce scale;
The high-efficiency vacuum jet system designed by painstaking experiments has continuous water output, low maintenance cost and low noise;
The steam spiral filtration system, with built-in steam purification device and reflux structure, can remove more than 95% of the free organic matter and free water, the effluent has zero heavy metals, the effluent COD is 70% higher than that of the low-temperature evaporator before the traditional iteration, and the effluent water quality is better and more transparent.
The equipment is simple to operate, the user-friendly operation interface, and the guided design (parameter setting, troubleshooting, maintenance reminder, etc.) can be completed by the operator only by step-by-step operation;
The Alibaba Cloud platform APP monitoring program can be installed on the user's mobile phone and computer, which is easy to use and has no operation threshold;
Wasenda patented vacuum tank structure.
No buffer tank, direct liquid crystallization treatment;
Spiral discharge system, which can carry out deep crystallization and discharge dry solid materials.
Description of the effect of case analysis
Federal Pharmaceutical is one of the six major pharmaceutical bases in China, and is a modern comprehensive pharmaceutical factory integrating pharmaceutical intermediates, APIs and pharmaceutical preparations. The annual output of 10,000 tons of amoxicillin API. The production process of the company's API will produce a large amount of wastewater, with a daily output of 1,000 tons of high-salt wastewater, and after the wastewater is disposed of by MVR evaporator + centrifugal + filter press, the daily output of 60 tons of evaporated mother liquor is previously disposed of as hazardous waste outsourcing incineration. The mother liquor has a salt content of 25%, a COD of 150000mg L, and a large water content. The original process is mother liquor recharge and incineration disposal. In the mother liquor recharge process, the overall quality of wastewater decreases, which is prone to pain points such as low evaporation efficiency, high maintenance frequency, and increased operating costs. In the incineration process, the high concentration wastewater has a low calorific value, consumes a large amount of auxiliary fuel, and generates exhaust gases, resulting in high disposal costs. At the beginning of 2019, in response to the demand for technological innovation, the company investigated and compared the existing wastewater treatment process and cost in the market, and at the end of the same year, the low-temperature evaporation and crystallization drying process developed by Kunshan Weishengda Environmental Protection Equipment was selected for disposal. In September 2020, the first set of MVR mother liquor disposal equipment was officially put into operation and has been in continuous operation until now. Through the low-temperature evaporation crystallization and drying process of Weishengda environmental protection, about 70% of the water in the original evaporation mother liquor can be distilled and separated to form biochemical water, with a COD of less than 500mg L and a negligible salt content. The high salt is evaporated and crystallized into a solid phase, which remains at about 30%. Reduction has been achieved. In February 2021, the customer's second set of mother liquor disposal equipment was also officially put into operation, and it has been running continuously so far with good results.
Customer site**.
Pre- and post-water samples**.
Pre- and post-water samples**.
Overview of techno-economics
Taking the above-mentioned Federal Pharmaceutical (Inner Mongolia) ** evaporation mother liquor project as an example, Kunshan Weishengda Environmental Protection Equipment provided the company with two sets of 30 tons of low-temperature evaporation crystallization devices. As a hazardous waste, the market of raw mother liquor is 5,000 yuan tons. The original annual outsourcing volume was 7,500 tons. Therefore, the cost of hazardous waste generated in the year was 37.5 million yuan. After the low-temperature evaporation treatment, the low-temperature evaporation cost, mainly the energy consumption cost of steam (by-product) and electricity, is converted into about 103 yuan tons, so the energy consumption input is about 775,500 yuan per year; the outsourcing cost of residual hazardous waste, the outsourcing cost is 11.25 million yuan; The combined annual cost savings are 3750-7755-1125=2547.450,000 yuan. The investment cost of the equipment can be recovered in about half a year.
Introduction to Technology ** (Company Profile).
Founded in 2009 and with more than 200 employees, Kunshan Weishengda Environmental Protection Equipment Co., Ltd. is a national high-tech enterprise, Jiangsu Province Environmental Protection Industrial Wastewater Evaporator Engineering Technology Research Center, Jiangsu Province Specialized and Special New Enterprise and Jiangsu Province Gazelle Enterprise. At present, it has obtained more than 150 authorized patents, and has been concentrating on R&D and innovation for many years, and the low-temperature heat pump evaporation technology and low-temperature evaporation crystallization and drying technology developed by Weishengda can concentrate and reduce the evaporation mother liquor of industrial high-concentration wastewater such as petrochemical, coal chemical industry, fine chemical, hazardous waste, electroplating, machining and new energy, with 600+ classic cases in China.