Substitution and dehydration method for water contained solid materials and device

Abstract

The invention provides a substitution and dehydration method for water contained solid materials and a device. In the method, the material is dehydrated by organic solvents with low boiling point and low latent heat, which are liquid at 0 DEG C to 60 DEG C and 0.1 MPa to 3 MPa, such as propane, dichloropropane, epoxy ethane, dimethyl ether, dimethyl sulphide and a mixture thereof or a mixture of the organic solvents and a surface active agent with low adsorbability and low latent heat, in dehydration equipment through the action of leaching, absorbing, substituting and the like and liquid-solid separation. The solvents and water can be separated and recycled by evaporating water bearing solvents in separation equipment and condensating the solvents in condensation recovery equipment or layering the solvents and water. Because the latent heat of the solvents is far less than that of the water, the solvent substitution and dehydration method and the device thereof of the invention can obviously reduce power consumption in the dehydration process, solve the problems of burning, wall built-up and the like through low operation temperature, and are suitable for dehydration of solid materials with different water contents.

Description

technical field [0001] The invention relates to a method and device for dehydrating solid materials containing water, in particular to a method and device for replacing and dehydrating solid materials containing water with low energy consumption, and can be applied to the fields of energy, light industry, environmental protection, materials, chemical industry and the like. Background technique [0002] In industrial production, many raw materials, intermediate products and products are solid substances with high water content, and the water content is the root cause of high energy consumption, low efficiency, and even processing difficulties in the further processing process. Therefore, the dehydration or drying of high-moisture materials represents a common technology in the process industry and is a high-energy-consuming industrial unit process. [0003] According to the different methods of removing moisture from materials, the dehydration methods of water-containing mate...

AI Technical Summary

Problems solved by technology

Therefore, solvent displacement dehydration is widely used in the dehydration and drying of precision devices, but when dehydrating and drying precision devices, the solvents used are generally unconventional chemical reagents with high cost, small production volume, and toxic side effects, such as fluorocarbon reagents Affected by this, its dehydration drying technology can only be limited to the drying of precision devices with high technical added value, small scale and high requirements on drying technology, and is not suitable for dehydration and drying of bulk solid materials.

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