In the production process of raw materials, the common production process is: reaction → crystallization → filtration → washing → filtration → drying. In the old process production equipment, each unit operation has corresponding unit equipment. The equipment is highly dispersed, and often requires manual operation, which is labor-intensive. During the material transfer process, the exposure time is long and human pollution is serious. Aiming at these problems, Wuxi ZhangHua has developed a three-in-one multi-functional equipment for cylinder-cone reaction, filtration and drying on the basis of introducing and assimilating foreign advanced technology.
The domestic three-in-one multifunctional machine is in the developing stage, and there are inevitably many shortcomings. Most of the equipment cannot realize the extrusion of the filter cake during the filtration process, and it is prone to cracking and open circuit of the filter cake, which affects the normal operation of the filtration; too much reliance on the stirring paddle, excessive pursuit of improving the equipment from the improvement of the structure of the stirring paddle The overall performance increases the cost of the equipment but the effect is not obvious; relying solely on the heat transfer of the jacket, the heat transfer area is small, the drying effect is poor, and the efficiency is very low; limited by the structure, the discharge is not complete and the product yield is low. The cylinder-cone reaction, filtration and drying three-in-one has proposed an effective solution to the above problems from two aspects of structure and technology.
Cylindrical cone reaction filter washing and drying machine working principle
The cylinder-cone reaction, filtration, washing and drying machine is in the same closed space, and the temperature is controlled by the jacket to carry out the pressurization or vacuum reaction of the material. After the reaction is over, after the material is heated and concentrated in vacuum, the temperature is lowered to crystallize and the reaction product is precipitated; the stirring spindle is started to make the lower cone filter plate pressurize or vacuum the crystallized solid-liquid mixture, and use the pressure difference at both ends of the filter cake and the stirring screw to Squeeze with squeeze for solid-liquid separation; add washing water to further remove the reaction liquid in the filter cake and remove impurities, and dry solid phase can be obtained after the solid-liquid separation process; start the internal heating ribbon to The material is heated and vacuum dried to finally obtain a product with a certain dryness.
Cylindrical Cone Reaction Filtration Washing and Drying Machine Equipment Structure
The cylinder-cone type reaction, filtration, washing and drying machine is a cylinder-cone structure. Heating jackets are installed on the cylinder body and the lower cone body to heat or cool the materials. A hollow shaft and a variable angle are installed inside the multi-function machine. The variable-lead hollow spiral stirring device stirs, stirs and lifts the material, and pushes out the material when discharging.
A conical filtering device with a relatively complex structure is installed in the lower cone, and a specially designed non-dead angle quick-opening discharge device or a non-dead angle pneumatic discharge ball valve is installed at the bottom of the equipment.
Performance advantages of barrel-cone reaction, filtration, washing and drying machine
From the actual operation and use of the barrel-cone multi-function machine to process various materials, it can be found that the barrel-cone continuous filter dryer has many advantages, the main performances are as follows:
① One machine is multi-purpose, and can complete various operations such as reaction, extraction, filtration, repeated filtration, washing, and drying in one machine, and the finished product can be obtained directly.
② The operation is flexible, and the operation cycle can be adjusted by adjusting the filter pressure difference, rotation speed, screw extrusion lead, etc., so as to adapt to the change of process conditions.
③ The machine can form a very thin filter cake on the surface of the filter medium or filter under the condition of no filter cake. The filtration rate per unit filtration area is very high, so the equipment is small and compact.
④ Fully enclosed system, the operating environment is quite good, especially suitable for handling toxic, flammable, explosive dangerous products and delicious food, biological products and pharmaceuticals that do not allow pollution.
⑤ It can not only concentrate, but also filter.
Especially when it is necessary to wash the materials, the materials can be concentrated first, and then thoroughly washed in the suspended state, which can reduce the handling of materials, reduce waste, and do not need to be repulped during washing, and the processed products are of high quality.
⑥ It can be used for three operations of reaction, filtration and drying, so that the functions of the three unit equipment can be completed on this one equipment, so that the equipment cost, floor area, labor intensity, energy consumption, etc. are greatly reduced.
⑦ The power consumption of this machine is low, and the extruded filter cake generally has lower water content than the flat three-in-one, and the operation is also convenient.