Calcination cleaning method of spinneret plate

Abstract

The invention relates to a calcination cleaning method of a spinneret plate. The spinneret plate is disposed in a muffle furnace for calcination, a cathode lead and an anode lead are arranged in a hearth of the muffle furnace and penetrate a furnace body of the muffle furnace to achieve insulation and heat insulation, the cathode lead is connected with a cathode, the anode lead is connected to a negative pole of a direct-current power supply, a positive pole of the direct-current power supply is connected with an anode through a lead, and the cathode and the anode are disposed in a electrolytic cell. Two sides of the spinneret plate are connected with the cathode lead and the anode lead respectively. Under the action of an external power supply, oxidation or sulphur corrosion of the spinneret plate in high-temperature calcination is greatly inhibited, so that effective calcination cleaning is achieved while material and structural completeness of the spinneret plate is guaranteed so as to prolong service lives of articles and the furnace body and guarantee stability and efficiency of spinning.

Description

technical field [0001] The invention relates to a method for calcination and cleaning of a spinneret, in particular to a method for calcination and cleaning of a spinneret to prevent corrosion. Background technique [0002] At present, during the production and development of chemical fibers, the spinneret needs to be cleaned, and the spinneret needs to be placed in a muffle furnace for high-temperature calcination and cleaning at a temperature of 300-600°C. [0003] Since the spinneret is made of alloy steel, if the polymer raw material contains highly oxidizing elements such as oxygen and sulfur, the metal will lose electrons under high temperature conditions, and the valence will increase, while oxygen or sulfur will gain electrons, maintaining the The electrical neutrality of the system forms a metal oxide or sulfide, which is called metal oxidation or sulfide. If the oxidation or sulfide corrosion of the spinneret material is caused during the calcination and cleaning ...

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Problems solved by technology

[0004] 1. The material of the spinneret is corroded, the structure of the material is defective, the material becomes brittle, and the size is deformed, which affects the next production process;

[0005] 2. The accumulation of metal corrosion products covers the chemicals that need to be calcined and cleaned, resulting in unclean cleaning and affecting production;

[0006] 3. Metal corrosion will accumulate in a large amount in the muffle furnace, which will affect the thermal efficiency and lead to a short service life of the equipment

[0008] 1. Control the corrosion environment, that is, vacuum calcination, so that the sulfur oxides produced by the calcination process can be removed from the furnace chamber in time, so as to reduce the contact between the compound and the objects to be cleaned. Although this method can reduce the corrosion degree of the material, it does not prevent it from Basically eliminate the corrosion of materials;

[0009] 2. Choose corrosion-resistant materials, but the selectivity of materials is small, because if the metal undergoes sulfide corrosion, the generated sulfide has special properties, unstable, large volume ratio, easy peeling of the film, many lattice defects, melting point and boiling point Low, easy to generate various sulfides without price. Such sulfides and oxides, sulfates and metals are easy to form low-melting eutectics, so there are not many high-temperature-resistant vulcanized materials;

[0010] 3. Select an effective anti-corrosion layer, that is, carry out anti-corrosion treatment on the surface of the object to be cleaned. Commonly used protection technologies include using NiCr, FeCr and Inconel625 thermal coatings on the material surface for arc spraying, supersonic spraying, etc. It has a certain protective effect, but the thermal coating used contains Cr, which will make the material more brittle, making it difficult to carry out high-pressure spinning for a long time, and the repair and maintenance costs are high

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