Wuxi Srui has developed a conical reaction filtration, washing and drying multi-functional equipment

It is well known that reaction, filtration and drying are three important unit operations in industries such as chemical engineering, medicine and food. Generally, three unit equipment - reaction vessels, filters and dryers - are required to complete them. These three unit devices each have their own supporting equipment. Due to their large floor space and high cost, the handling or transportation of materials between units is rather troublesome. Not only is the labor intensity high, but it is also prone to material loss and waste. For flammable, explosive, toxic or highly toxic materials, or biological products, medicines, foods, etc. that are not allowed to be contaminated, closed operation is required. At this point, the difficulty of material transportation among the reaction, filtration and drying devices becomes even higher. Sometimes, this often leads to the entire set of devices being unable to operate normally or having a high labor intensity, a long production cycle, high energy consumption and low efficiency, which affects product quality.

In response to market demands and customer requirements, our company has carried out extensive design and research and development work, and finally successfully developed the conical reaction filtration washing and drying machine (patent number: (ZL 201721560677.6) has achieved significant improvements in the technical performance of the equipment. From structural design to application, it closely follows the corresponding regulatory requirements of the fine chemical industry and has been maturely applied in many fine chemical enterprises.

The structure and working principle of the conical reaction filtration, washing and drying multi-functional equipment

The structure of the conical reaction filtration, washing and drying multi-functional equipment is shown in the following figure. The upper part is a vertical cylindrical container, and the bottom is a conical structure. The filter medium is lined around the inner layer of the cylindrical body shell. A hollow helical ribbon agitator is installed at the center of the equipment. The helical section that cooperates with the filter medium functions as a scraper when rotating, while the screw at the bottom is tightly attached to the cone during assembly, exerting a helical squeezing effect.

When filtering materials, the slurry (solid-liquid mixture) to be filtered is pumped into the container of the filter machine, and sufficient pressure is applied to make the filtrate pass through the filter medium (if the slurry does not need to be pumped and directly flows into the container of the filter machine, vacuum filtration can also be carried out at the clear liquid outlet). At this time, the filter cake continuously thickens on the filter screen or other filter medium. However, the hollow helical ribbon agitator is rotating slowly, constantly scraping the filter cake down, achieving typical dynamic filtration. The scraped filter cake is slowly pushed onto the cone, then squeezed and dried by the squeezing screw belt, and finally exits through the lower discharge valve.

Technical advantages of the conical reaction filtration, washing and drying multi-functional equipment

From the actual operation and use of the cylindrical cone-type multi-functional machine in processing various materials, it can be found that the cylindrical cone-type continuous filtration dryer has many advantages, mainly manifested as

(1) Multi-functional in one machine, it can complete various operations such as reaction, extraction, filtration, repeated filtration and washing, and drying within one machine, and directly obtain the finished product.

(2) It has a large operational flexibility and can adjust the operation cycle by regulating the filtration pressure difference, rotational speed, and screw extrusion lead, etc., to adapt to changes in process conditions.

(3) This machine can form a very thin filter cake on the surface of the filter medium or perform filtration without a filter cake. The filtration rate per unit filtration area is very high, so the equipment is small and compact.

(4) Fully enclosed system, with an excellent operating environment, is particularly suitable for handling toxic, flammable, explosive and other dangerous products, as well as fresh and delicious foods, biological products and medicines that are not allowed to be contaminated.

(5) It can both concentrate and filter. Especially when it is necessary to wash the materials, the materials can be concentrated first and then thoroughly washed in a suspended state, and finally filtered by pressure. This can reduce the handling of materials, minimize waste, and there is no need for slurry during washing. The quality of the processed products is very high.

(6) It can be used for three operations: reaction, filtration and drying, enabling the functions of the three unit devices to be accomplished on this single device. As a result, the equipment cost, floor space, labor intensity and energy consumption are all significantly reduced.

(7) This machine has low power consumption. The moisture content of the filter cake it extrudes is generally lower than that of the three-in-one plate type, and it is also convenient to operate.

In conclusion, the conical reaction filtration, washing and drying multi-functional equipment is currently one of the more advanced multi-functional filtration devices. Its unique superiority is bound to be more widely applied in fields such as chemical engineering, medicine, food, metallurgy and light textile.