Chemical Fiber Industry

Helsh-Tech's rotor pumps, grinding pumps, and mixing & homogenizing emulsifying pumps are widely used in the chemical fiber industry, involving the conveyance, grinding, homogenizing mixing, and emulsifying of various high-viscosity media, such as viscose pulp media and slurries of fibers like vinylon, acrylic, spandex, polyester, polypropylene, and artificial fibers. These pumps cater to various production process requirements, including functional fiber slurry polymers.

Case Study

Pulp Rotor Pump

The pulp of regenerated cellulose forms a dry porridge-like medium after immersion in liquid soda, with pulp, liquid soda, and crushing as the main processes. The process flow is as follows: immersion in soda solution → soda pump → soda metering tank → pulp feeding machine → immersion tank → pulp rotor pump → pressure balancing tank → press machine → pre-crushing roller → crushing machine → compacting machine. This series of operations causes the cellulose to swell and increases the viscosity of the pulp porridge. After sulfonation, the viscose solution contains some larger particles that need to be initially crushed by a crushing machine for further grinding by a grinding pump, thereby improving grinding efficiency and facilitating subsequent dissolution. The rotor pump is mainly used for transferring the immersed pulp porridge and supplying material to the press. This operating condition requires low pulsation, corrosion resistance, and low leakage.

Viscose Rotor Pump

The purpose of immersing, pressing, and crushing the alkali fiber is to transform the cellulose in the alkali solution into alkali cellulose, dissolve hemicellulose, puff the pulp to enhance reactivity during the yellowing reaction, facilitate the formation of alkali cellulose and the dissolution of hemicellulose, and tear the cellulose into particles (0.1~5.0mm) to increase the reaction surface area. The main processes include: 1) alkali cellulose + carbon disulfide → sodium cellulose xanthate + water + heat, and 2) solid phase (alkali cellulose), liquid phase (CS2, water), and gas phase (CS2 gas, water vapor). There are mainly conveying conditions such as material transfer, mixing, filtration for glue supply, post-dissolution grinding for glue supply, rapid detachment for glue supply, and circulation. Helsh-Tech's rotor pump adopts a spiral streamline structure, which is more conducive to the smooth conveyance of high-viscosity materials with extremely low pulsation. The rotors are made of stainless steel 304 and 316, featuring ingenious design and precise processing. The gaps between rotors and between rotors and the pump cavity are extremely small, ensuring high conveying efficiency, low wear, better energy-saving performance compared to other pump types, long service life, stable operation, and low maintenance costs.

Mixing & Homogenizing Pump

Helsh-Tech's homogenizing mixing pumps are mainly used in the production process of colored viscose fibers, replacing traditional equipment and processes with advanced features of existing process equipment. They mix color paste, viscose raw liquid, and other mixture media according to user-provided data into the pump cavity. Then, through multi-stage gear disc rotors and stators, the mixture undergoes gradual mixing, dispersion, and homogenization, significantly improving mixing efficiency compared to traditional mixing equipment.

Grinding Pump

Helsh-Tech manufactures two types of grinding pumps: manually adjustable and automatically adjustable. These pumps are classified for grinding based on operating conditions and process requirements, achieving coarse and fine grinding efficiency. The gap between gear discs can be customized according to the particle size and refinement requirements of the material, adapting to the automatic recycling grinding and dissolution process of viscose. The adjustment of the working gap of the grinding disc is controlled by the DCS system to meet process requirements. The rotors and stators can be independently replaced, facilitating maintenance and reducing costs. Adopting a special double-ended mechanical seal made of special material ensures reliable sealing, long life, cleanliness, and environmental protection.