The importance of digesters in calcium hydroxide production lines for improving the quality of calcium hydroxide
In the production process of calcium hydroxide, the digester is undoubtedly a crucial equipment. Its importance is not only reflected in the smooth progress of the production process, but also in the decisive role in improving the quality of calcium hydroxide. This article will discuss in detail the working principle, functional characteristics and specific impact of the digester on the quality improvement of calcium hydroxide.
Working principle and functional characteristics of digesters
The digester is one of the core equipment in the calcium hydroxide production line. Its working principle is mainly to use water and calcium carbonate in limestone to react chemically at high temperature to generate calcium hydroxide and carbon dioxide.
Equipment configuration
① Spray water mist lime dust collector
② Stirring box lime digester
Working principle
- After the sieved calcium oxide (quicklime block) is crushed, it is lifted to the raw material warehouse (also known as lime storage warehouse) for standby;
- When the digestion is started, the calcium oxide (20~40mm block material) is quantitatively and uniformly fed into the lime digestion box through a vibrating feeder, and the feeding speed can be adjusted at will;
- After adding natural water (H₂O), the calcium oxide block material absorbs water and produces a chemical reaction in 5~8 seconds, gradually converting into calcium hydroxide (Ca(OH)₂), and at the same time produces a large amount of hot steam, and carries a certain amount of calcium hydroxide powder;
- Under the action of the fan, the hot steam is discharged outward through the pipeline, and the installed spray nozzles and spray nozzles form a water curtain wall section of a certain width and height under the action of the dust removal water pump. After filtering the dust in the hot steam, it is discharged into the atmosphere through the pipeline.
Technical features
| Technical Features | Description |
|---|---|
| Three-stage Dust Removal | Heat recovery utilization, promotes digestion and decomposition Real-time weighing |
| Real-time Weighing | Feeding proportioning and water metering |
| Patented Water Mist Dust Removal | Pipeline sidewall water film anti-adhesion |
| Adjustable & Controllable | Pre-mixing speed adjustable, material layer depth controllable |
The system connects pulse dust removal and water mist dust removal in series, providing double protection. Even if the bag is damaged, it can avoid immediate shutdown and staggered maintenance and repair.
Precise weighing and metering of feed and water distribution.
Each working axis is equipped with an independent dedicated reducer and motor, which ensures stable operation.
The patented water mist dust removal effectively recovers heat, forms water for promoting digestion, and takes into account the dust removal function. The inner warehouse wall is equipped with a special cleaning nozzle, which effectively avoids the problem of dust adhesion and calcification.
The specific impact of the digester on the quality improvement of calcium hydroxide
Improve product purity
The digester can minimize the generation of impurities and by-products and improve the purity of calcium hydroxide by precisely controlling the reaction parameters. Purity is one of the important indicators for measuring the quality of calcium hydroxide. High-purity calcium hydroxide has a wider application value in the fields of building materials and chemicals.
Improve product particle size distribution
During the digestion process, the digester can make the generated calcium hydroxide particles more uniform through reasonable stirring and mixing, and improve the particle size distribution of the product. Calcium hydroxide with uniform particle size distribution has better solubility and reactivity, and can meet the product quality requirements of different industries.
Improve product stability
The digester can ensure the crystallinity and crystal form of calcium hydroxide and improve the stability of the product by precisely controlling parameters such as reaction temperature and time. Calcium hydroxide with good stability is not easy to deteriorate and fail during storage and use, which can ensure the long-term performance and use effect of the product.
Energy saving and consumption reduction
The digester adopts advanced energy-saving technologies, such as high-efficiency heat exchangers and waste heat recovery systems, which can significantly reduce energy consumption. At the same time, by precisely controlling the reaction parameters, unnecessary material waste and energy consumption can be reduced, and production costs can be reduced.
