Spray dryer for concentrated waste liquid

Concentrated waste liquids are waste liquids in which the concentration of solutes in the liquid waste has been significantly increased after various treatment processes.A large amount of concentrated waste liquid is generated after chemical synthesis, separation and purification operations.For example, in the production of pesticides, after the reaction kettle after the synthesis of the mother liquor, after a number of extraction, distillation and other operations, organic solvents, unreacted raw materials as well as by-products of the reaction and other substances in the concentration of the concentration of the formation of concentrated waste liquid.The mother liquor after crystallization and filtration in the process of drug production contains a large number of active pharmaceutical ingredients, excipients, solvents, etc., and these mother liquors are concentrated to produce concentrated waste liquid.For example, after the fermentation broth in the antibiotic production process is filtered to extract antibiotics, the remaining fermentation broth is concentrated and becomes concentrated waste liquid.Concentrated waste liquids contain high concentrations of organic matter, heavy metals, inorganic salts and other components.

Concentrated waste liquid spray dryer Working principle

(1) Liquid atomization: Concentrated waste liquid through high-pressure pumps or special atomization devices, such as centrifugal atomizers, pressure nozzles, etc., is dispersed into a tiny mist droplets. These atomizers can make the liquid material to form a large droplet group, greatly increasing the surface area in contact with hot air.

(2) Hot air supply: the air is filtered by the filter and then enters the heating device to be heated to the set temperature, and then enters the drying chamber evenly through the hot air distributor. The hot air is used as a drying medium to provide the required heat for the moisture CiFa in the droplets.

(3) Heat exchange and drying: the atomized concentrated waste liquid droplets and hot air in the drying room fully contact and heat exchange. Due to the large surface area of the droplets, the water evaporates rapidly, and most of the water in the droplets is removed in a very short time, thus realizing the drying of the concentrated waste liquid. During the drying process, the solutes in the waste liquid gradually solidify to form solid particles.

(4) Finished product collection and tail gas treatment: After drying, most of the solid particles fall into the collector at the bottom of the drying tower under the effect of gravity and are collected, and a small amount of particles brought out with the tail gas are further captured and recovered by cyclone separator, bag filter and other gas-solid separation equipments, in order to prevent dust emission from polluting the environment. And the exhaust gas after separation is exhausted by the induced draft fan.

Spray Dryer for Concentrated Waste Liquid Technology Optimization

(1) Technological innovation and upgrading

High efficiency and energy saving: through improving the spraying system, optimizing the drying process parameters and adopting new energy-saving heating technology, etc., the drying efficiency can be further improved and the energy consumption can be reduced.Jiangsu Bohong developed a more efficient atomizer, so that the liquid droplets smaller and more uniform distribution, thus increasing the contact area with the hot air, speed up the drying speed: At the same time, the use of waste heat recovery devices, such as the drying process of waste heat recycling and reuse, reduce energy waste.

Intelligent automation:Combining the Internet of Things, big data, artificial intelligence and other cutting-edge technologies to realize remote monitoring, fault diagnosis and automatic warning, intelligent adjustment and other functions of the equipment.With the help of sensors real-time acquisition of equipment operating status and process parameters, such as temperature, humidity, pressure, flow, etc., and data transmission to the central control system for analysis and processing, according to the preset algorithms and models to automatically adjust the operating parameters of the equipment, to ensure the stability of the drying process and the consistency of product quality, to improve the efficiency of production and management level, and to reduce the cost of labor and operational risk.

(2) Environmental performance optimization

Green energy applications: with the continuous improvement of environmental awareness and the adjustment of energy structure, the future concentration of waste liquid spray mold dryer will be more solar, wind, biomass and other renewable energy as a heat source, to reduce the dependence on traditional fossil energy sources, reduce carbon emissions, to achieve a more environmentally friendly and sustainable development.In addition, we can also explore the use of factory waste heat, waste heat, etc. as the auxiliary heat source of drying, to improve the comprehensive utilization efficiency of energy.

Tail gas treatment and emission reduction: Equipped with more efficient tail gas treatment device, the exhaust gas generated in the drying process is deeply purified to reduce the emission of dust, harmful gases and other pollutants.For example, the use of bag filter, electrostatic precipitator, activated carbon adsorption device, catalytic combustion device and other combinations of processes to remove particles, organics, odor, etc. in the waste gas, so as to meet the more stringent environmental protection emission standards and reduce pollution of the environment.

Resource recovery and recycling: Enhance the recovery and utilization of useful substances in the concentrated waste liquid, so as to realize the maximum utilization of resources and the reduction of waste.In the drying process, through special technology and equipment, the valuable components in the waste liquid, such as metal ions, salts, organic solutes, etc., can be separated and recovered, and reused as industrial raw materials or products, which can not only reduce the production cost of the enterprise, but also reduce the exploitation of natural resources, and improve the economic and environmental benefits of the enterprise.

(3) Non-standard customization

Meet diversified needs: different industries, different enterprises produced by the concentration of waste liquid composition, nature, treatment is a large difference, the future of concentrated waste spray dryer will pay more attention to personalized customization, according to the user's specific needs to provide customized equipment solutions.Including equipment specifications and dimensions, processing capacity, drying method, material selection and other aspects of personalized design, in order to better adapt to the production process and site conditions of different users, to improve the applicability of equipment and market competitiveness.

Customized services: In addition to the customized production of equipment, we will also provide a full range of customized services, such as installation and commissioning, operation training, after-sales maintenance, technical consulting and so on.According to the user's production plan and requirements, to develop a personalized service program, to ensure that the equipment can be installed smoothly, stable operation, and timely and effective maintenance and repair, to provide users with one-stop solutions to meet the user in the full life cycle of the equipment in a variety of needs.

(4) Integration with other technologies

Combination with pretreatment technology: In order to improve the effect of concentrated waste liquid spray drying and the operational stability of the equipment, the future will pay more attention to the integrated application of pretreatment technology.For example, membrane separation, ion exchange, flocculation precipitation and other pretreatment methods are used before drying to remove impurities, macromolecules, heavy metal ions, etc., reduce the viscosity and corrosiveness of the waste liquid, improve its dryability, reduce the clogging and wear of the equipment, prolong the service life of the equipment, and at the same time, improve the quality and purity of the dried products.

Interface with downstream processes: Strengthen the interface and synergy with downstream processes to form a complete industrial chain and improve the efficiency and effectiveness of the entire production process.The spray-dried powder products are directly transported to the subsequent processing, packaging and other processes to achieve continuous and automatic production, reduce the intermediate links of material transfer and storage, reduce production costs and quality risks; in addition, according to the requirements of the downstream products, the dry product size, shape, fluidity, etc. can be adjusted to meet the needs of different processing and use.