What is the technology of double cone dryer?

1, used rake vacuum dryer

The transmission part adopts a cylindrical gear reducer with stable operation and durability, the active shaft adopts thick stainless steel solid shaft, and the rake tooth adopts high-strength casting stainless steel enamel teeth, which fully guarantees the helium-type vacuum dryer under various harsh working conditions. Stable operation. The heating medium can be steam, thermal oil, hot water. Suitable for drying loose powdery materials.

2, QZG ramming beater vacuum dryer

The squeezing stick vacuum dryer is a model which is adapted and improved on the basis of an ordinary sagger vacuum dryer. Two or four percussion rods can be added inside the shell to facilitate rapid drying and crushing of the materials. The heating medium can be steam, thermal oil, hot water. It is suitable for sticking agglomerates before drying, loose material after drying.

3, JZG blade type vacuum dryer

Paddle type vacuum dryer is a common type of vacuum dryer combined with paddle dryer has a large heat transfer area and fast drying rate. In addition to all the targeted advantages of ordinary rake dryers, due to the built-in hollow blades and mixed screw ribbons, the rake dryers have a stronger drying capacity than conventional rake dryers. The drying strength is doubled and the unloading speed is fast. The heating medium can be steam, thermal oil, hot water. It is suitable for materials with high solvent content, fast drying and complete mixing; it has obvious advantages for materials containing organic solvents.

4, LZG double ribbon vacuum dryer

The double-helium helium type vacuum drier is a type that is adapted and improved on the basis of an ordinary rake vacuum drier. In addition to all the targeted advantages of ordinary rake dryers, due to the built-in positive and negative double screw forced continuous turning and mixing, the materials in the drying process are difficult to agglomerate and agglomerate, which is suitable for the vacuum of loose materials that are easy to agglomerate and agglomerate. dry. together can use as a mixer. The heating medium can be steam, thermal oil, hot water. Suitable for loose powdery materials to complete drying and mixing simultaneously.

Used rake vacuum dryer equipment improvement

There are many problems in the structure of the conventional rake type vacuum dryer. In general, there is no internal heating structure for the shaft and the rake tooth. Some of them use hollow shafts and hollow boring teeth, but due to the unreasonable design of the fluid flow path and the low drying efficiency, they directly restrict the scale and size of the equipment. Second, the use of a simple packing seal structure will seriously affect the product. quality. In response to these problems, through the experimental study, our technicians developed a new type of high efficiency vacuum dryer with excellent structure and performance, and its technical level has reached the international advanced level. The main contents of the research and development of a new type of jaw vacuum dryer include a baffle jacket, a special runner type hot shaft and a new sealing structure.

Second-hand dryer works

The rake type vacuum dryer is mainly composed of a stirring shaft, a barrel, a transmission system, and a sealing device. The heat required for drying is mainly provided by the agitator shaft and the barrel jacket. When the heating medium is passed into the equipment, the heat is indirectly heated by the jacket and the stirring shaft. The moisture in the wet material is vaporized by heat, and the vaporized moisture is pumped away in time by the vacuum system. With the continuous rotation of the stirring shaft, the contact between the material and the heating surface is continuously updated, so that the material is uniformly heated, thereby achieving a good drying effect.

The new rake vacuum dryer mainly improved the three aspects of the internal baffle jacket, the special runner hot shaft, and the sealing structure of the dryer.

Baffled jacket

The crucible type vacuum dryer is mostly used for low temperature drying, and the heating medium used is mainly hot water. The hot water is fed into the jacket of a conventional vacuum rake dryer. If the flow rate is too small, a “short circuit” phenomenon may easily occur in the jacket, resulting in uneven heating of the jacket. If the flow rate is too high, the “short circuit” phenomenon may be reduced. Produced, but increased the power consumption of the hot water pump, while the tighter requirements for the hot water circulation pipeline is also more stringent. With a baffled jacket structure, after the hot water enters the jacket from the inlet, there is a fixed flow path, so regardless of the flow rate of hot water, hot water can flow through each place of the jacket to evenly heat the jacket. At the same time, it also increases the turbulent effect of hot water and improves the heat transfer efficiency.

Special runner type hot shaft

The shaft and jaw teeth of the new jaw vacuum dryer are hollow and can pass into the heating medium. The surface can be used as a heat transfer surface. Therefore, the shaft and the molar teeth are collectively called the hot shaft (also called the agitator shaft).

For the large jaw vacuum dryer, the heat transfer area of ​​the hot shaft accounts for more than 60% of the total heat transfer area, and its heat transfer effect directly affects the drying efficiency of the dryer. In order to increase the heat transfer effect of the hot shaft, a special heat medium flow passage is designed in the hot shaft, thereby greatly enhancing the heat transfer.

New sealing structure

Filler seals have the advantages of heat resistance, pressure resistance, simple structure, reliable sealing, economical, and easy maintenance. Therefore, many dynamic seals are filled with packing. However, in the vacuum rake dryer, the separate packing seals easily contaminates foreign matter in the material to be dried. For this reason, a new double seal structure has been developed between the end cap and the hot shaft to prevent foreign matter from falling into the material. At the same time also solved the material leakage.

Second-hand dryer equipment features

The machine adopts the simultaneous heating method of sandwich and internal stirring, with large heat transfer surface and high thermal efficiency.

The machine is set to stir, so that the material in the cylinder to form a continuous cycle of state, to further improve the uniformity of the material heated