Method for automatically discharging silane slurry residue according to solid-containing content

Abstract

The invention provides a method for automatically discharging silane slurry residue according to the solid-containing content. The method comprises the following steps that heavy component materials after the washing tower separation enters an evaporation system, the evaporation system is heated to evaporate light components, after concentration by the evaporation system, the slurry residue is discharged to a slurry residue sending system, and then the slurry residue is discharged; the discharge time interval of the slurry residue in the sending system is calculated according to the formula presented as the formula (I): T<n>=T<n-1>+T<n-1>*(P<0>-P<n-1>) / P<0> (I). The treatment of the silane slurry residue according to the method for automatically discharging the silane slurry residue according to the solid-containing content can effectively reduce the emission, the number of clogging is reduced, the production cost of organic silicon is saved, and at the same time, the requirements of energy saving and emission reduction is met; the method is a treatment method suitable for large-scale industrial popularization of the silane slurry residue.

Description

technical field [0001] The invention relates to the technical field of organic silicon, in particular to a method for discharging silane slag in the organic silicon industry. Background technique [0002] Silicone is a new type of chemical product with excellent performance and wide application, including silicone oil, silicone resin, silicone rubber and other products, which are widely used in textiles, automobiles, construction, electronics, cosmetics and other fields of life and special fields such as national defense. Many organosilicon products mainly come from the direct method monomer synthesis device. The general process is: after the liquid phase chlorosilane is metered, it is vaporized by the vaporizer, heated by the superheater and enters the fluidized bed through the distribution plate, and the silicon powder is mixed with the catalyst. Finally, it enters the fluidized bed from the feeding port of the fluidized bed, and the reaction is started by heating with hea...

AI Technical Summary

Problems solved by technology

The solid content range of synthetic pulp slag discharge is 40-60%, low solid content discharge will cause waste of chlorosilane, high solid content discharge will cause slag discharge blockage

[0003] In the prior art, the problem of harmless treatment of pulp residue has not been effectively solved, and many factories simply bury or incinerate, causing great pollution to the environment

CN106623370A discloses a silane pulp and slag treatment process and system, which involves the hydrolysis of chlorosilane and produces a large amount of hydrogen chloride gas. Although the acid mist produced by hydrolysis is absorbed in this patent, the problems of equipment corrosion, safety hazards and environmental pollution have not yet been solved. effective solution

Excessive discharge of pulp residue not only discharges more chlorosilanes and increases the unit consumption of raw materials, but also produces more sewage and black solid hydrolyzate, which pollutes the environment and increases treatment costs

If the discharge of pulp residue is too small, the pulp residue will easily block the evaporation system, delivery system and its pipelines. Chlorosilane is a flammable liquid, and the synthetic pulp residue is discharged at high temperature, which poses a high safety risk

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