Product Introduction

The electric digester (cooker) is designed based on the operating principle of industrial rotary spherical digesters. The vessel rotates to thoroughly mix the raw material and pulping chemicals, making it suitable for sulfonation, acid, or alkaline cooking of raw materials in paper laboratories. By applying different process conditions, desired plant pulps can be obtained, providing a basis for developing production cooking processes. It can also be used for experiments with other liquid raw materials at working pressures not exceeding 8 kg/cm², such as oxygen bleaching, and can supply steam to other laboratory equipment. The vessel is constructed from 304 or 316L stainless steel and is equipped with a pressure gauge and safety valve for safe operation. The electrical control system uses brushless conductive technology to avoid common faults.

Key Features
Simulated Rotary Digester Design: The vessel rotates to ensure thorough mixing of materials, realistically simulating industrial rotary digester operation for results that are more relevant to production.
Corrosion-Resistant Stainless Steel Vessel: The vessel is made from 304 or 316L stainless steel, offering excellent corrosion resistance and high-temperature tolerance, suitable for both acid and alkaline cooking environments.
Uniform and Efficient Heating: Electrically heated with a large heating area, high thermal efficiency, and uniform heating. Liquid boiling time is short, and heating temperature is easily controlled.
Multiple Safety Protections: Equipped with a pressure gauge and safety valve, an external insulated jacket, and a brushless electrical control system for safe and reliable operation.
Precision Temperature Control: Temperature measurement accuracy of ±0.1°C and control accuracy of ±3°C meet the needs of precise process control.
Multi-Purpose Use: In addition to cooking experiments, it can supply steam to other laboratory equipment, offering versatility.
Energy-Efficient and Environmentally Friendly: The insulated jacket design effectively reduces energy waste, while the efficient heating method supports energy conservation and emission reduction in the laboratory.

Technical Specifications

FAQ
1. Power on but no heating / temperature not rising
Heating element burnt out, temperature controller/thermal fuse open, or power cord/plug poor contact. Check power supply and plug; measure heating element resistance; replace damaged controller/heating element.
2. Slow heating, uneven temperature, cannot reach 100°C
Scale on heating element, insufficient water level, or temperature probe scaled or displaced. Clean inner vessel and heating plate scale; refill to standard level; clean and secure probe.
3. Water shortage / dry-boil alarm, frequent tripping
Water level too low, float/level sensor stuck or scaled, or dry-boil protection triggered. Add water to marked level; clean level sensor; check and reset thermal switch.
4. Weak steam, low pressure
Lid gasket aged, vent/safety valve clogged, or inner vessel heavy scale. Replace silicone gasket; clear vent valve; descale thoroughly.
5. Steam leak (hissing around lid, abnormal noise)
Gasket aged or deformed, lid not properly closed, or latch loose. Level the lid and tighten latches evenly; replace gasket.
6. Inaccurate temperature control, fluctuating
Temperature probe scaled and loose, or controller drift. Clean and resecure probe; calibrate controller or replace probe.
7. Severe scaling on inner vessel / heating plate
Prolonged use of hard water, lack of regular cleaning. Periodically clean with citric acid / descaler; keep inner vessel clean.
8. Display blank, buttons unresponsive
Power board / fuse blown, buttons damp or damaged. Check power fuse; air-dry after power off; replace buttons or main board.
9. Uneven moisture in samples after cooking, localized overdrying
Uneven steam distribution, samples packed too densely, or unstable water level. Arrange samples in layers with gaps; maintain stable water level; descale to improve steam output.
10. Odor, yellowing, rust
Scale plus residual stock, prolonged moisture, or aged seals accumulating dirt. Thoroughly clean and descale; dry before storage; replace aged seals.

After-Sales Service
Thank you for your inquiry. Shandong Annimet Instrument Co., Ltd., established in 2007, has dedicated nearly two decades to the R&D, production, and sales of quality testing instruments. We regard product quality as the lifeblood of our enterprise and pursue excellence in every product developed. Looking back at the history of scientific and technological development, we firmly believe that every product is born from technological advancement, every technology derives from material exploration, every material discovery depends on process improvement, and every process improvement relies on experimental support. Humanity never lacks ideas; we need the means to realize them. Annimet Instrument will consistently provide the tools for your ideas and creativity. Should you have any questions, please feel free to contact our customer service team—we are fully committed to providing excellent pre-sales, in-sales, and after-sales service.