How to deal with the high energy consumption of pulp tray drying

The purpose of pulp tray production is to protect the integrity of fragile items such as birds and eggs, electronic products, toys, flower pots, and tea cups, as well as convenient transportation. The added value of paper trays and egg trays is not high, so it is very necessary to improve product quality and reduce production costs.

First of all, let’s look at the production process of the pulp tray:

1. Pulverize the recycled waste paper (cartons, books and newspapers, etc.) on the market into pulp with a special pulper. When waste paper is processed, it must be properly cleaned up. Wastes such as iron wire, hemp rope, soil, etc. cannot be processed together with waste paper, and must be cleaned up.
2. The pulp concentration is adjusted to 0.5%-1% with water. In the process of egg tray pulping, if no additive or pulping is required, this step is very simple. This step is very important for pulp. The auxiliary agent makes the pulp egg tray have certain characteristics under certain conditions, such as: moisture-proof, anti-corrosion, etc., so the auxiliary agent must be increased according to the amount.
3. Transfer the modulated pulp to the pulp molding machine, use the vacuum suction effect to adsorb the pulp on the pulp molding mold, and dry or dry it after vacuum dehydration molding. In the process of egg tray forming, it is mainly the adsorption and forming of pulp. If the adsorption is not possible (vacuum degree), the quality of the product will be greatly reduced (for example, the egg tray is bad, has no patience, and has no stiffness). Because the adsorption force comes from the suction force of the vacuum pump, that is, the dehydration force, if it is too large, the mold will be damaged easily, and if it is too small, the quality will be too poor, so the control of the suction force in this process is particularly important. Other egg tray molds are the key to the production of egg trays. The molds must be handled carefully. After a period of use, they should be cleaned with a cleaning machine to ensure that the surface of the molds is clean, so that the egg trays made in this way are more standard.

According to the characteristics of the pulp tray, the moisture content of the general egg tray is 150-180 grams. The air energy heat pump egg tray dryer needs to dehumidify more than 60% in the process. Dehumidification and hot air circulation are very important, which can ensure a closed drying process. In the dry room, the instruction of the intelligent temperature and humidity control system is received, and the egg tray is evenly dried, and the speed is fast, and a batch is completed in about 3 hours.

We know that industrial pulp trays, paper tubes, corrugated paper, etc., these materials generally need to be dried throughout the year, and the seasonality is not obvious, so the air-energy heat pump type egg tray dryer should be equipped to meet the requirements of different situations throughout the year: general The drying policy is relatively simple and fixed, and it is less necessary to consider the versatility of the drying policy. It requires a high degree of operation automation, fully automatic operation, and the key to control is medium and high temperature, high speed, high efficiency, energy saving, and all-weather. According to different paper support and paper product materials, there are two types of side blowing or top blowing. The commonly used drying methods are static, tunnel, belt, circulating air and advection.


Post time: Jun-01-2022