ZGP series harrow type vacuum driers

The attentive items when place an order

. Please notify us the following items when you inquiry and place an order:

1.The material of the inner casing.(It is normal used the SUS304.)

2.The heated type.(Steam, hot water, hot oil)

3.The highest pressure of the steam. (When the steam is used for drying the material.)

4.The highest temperature in the double casing.

5.The viscosity number of the material.

6.Whether the explosive requirement is necessary for the motor.

7.Whether the explosive requirement is necessary for the electrical controlled device which controls the harrow teeth turning in positive or negative direction at definite period.

. Because the practical condition in the various industries and dryness techniques is very different, such as, the heated temperature, the vaporized volume, the cooling volume, please offers the following technology parameters if you want us to choose the vacuum pump and condenser:

1.The name of the pumped media. (for example: water or other solvent)

2.The average temperature in the double casing of the drier.(for example:110oC)

3.The work pressure. (for example:-0.08MPa)

4.The maximum volume of the vaporized liquid (for example: 30kg/h)

5.The practical cooling condition.(The temperature and the flowrate of the cooling water.)

. If the above parameters can't be given and the similar successful experiences are not obtained, we recommend that you'd best come to our company for dryness trial.

• Notes: 1. The type of the drier for trial is ZGP-100 and it can dry 50L of the finished product every time. We recommend that the proper volume of the dryness material brought with the customer is 30~50L every time.

2.The trial device includes the oil-heating system and vacuum pump.

3.It will cost you a reasonable charge for the dryness trial.

4.If you want to come to our company for trial, please notify us 2 days before so as to prepare the trial device for you

Working Principle

The harrow vacuum drier is a kind of dryness equipments which uses the decrease of the boiling point of the water containing in the material in the vacuum. This drier uses the indirect heating style with the double casings to heat the water and pump the vapor out in time. In the inner casing, the harrow teeth are driven by the transmission shaft, and a definite angle is designed between the harrow teeth and the shaft line. The active shaft turns in positive and negative direction to make the materials move towards the axial direction till pushed out. By this method, the material can be dried and discharged out efficiently

Structure characteristics:

• .The solid stainless steel shaft is different with the hollow stick which is used in other factories. Because the status of the dried materials is very complicated and the material will become sticky in the dryness process, the best performance of the solid stainless steel shaft is just able to guarantee the steady dryness process.
• .The drier body uses the sticker steel board and the normal pressure of the double casing is 0.5MPa. It also can be designed and manufactured according to the different requirements of the customers.
• . Cast stainless steel harrow teeth. Most manufactures use the hollow pipe welding harrow teeth which are easy to curve during the dryness process especially to add the knocking sticks in the drier, so the hollow pipe welding harrow teeth have higher failure rate and are easy to be curved and broken. But we design the knocking sticks made of the stainless steel pipes with hollow wall which are approximately as long as the casing length. In the drier casing, the knocking sticks move freely. Normally, there are two or four knocking sticks in the casing to knock the materials constantly till the materials are smashed. So the dryness process is shortened and the finished products are better. The high strength and stability of the cast stainless steel harrow teeth leads to the steadily working environment when add the knocking sticks. The advantages have been proved in the practice.
• .The humanism design of the inlet and outlet parts. The inlet part uses the quick unloading flange so that the loading is convenient and quick. The outlet part uses closed discharge structure of the worm wheel which leads to convenient discharge and simple operation and easy pack without residual materials.
• .The advanced shaft seal makes the lest leakage. This type of seals is proved better in the process of the solid methylate natrium which requires the seal highly.

Sketch map of the structure of the worm wheel of the outlet parts (Note: this structure is only used in the ZGP-1000 and other types whose volume is larger than ZGP-1000. As the driers with small volume, their structure is quick downloaded structure.)

1．Casing of the outlet parts　　　 2．Shaft of the worm　　　 3．Fore bearing housing of the worm　　　

4．Handwheel　　　　         　 　  5．Worm wheel　　　   　   6．Seal washer

7．Top seal washer　　   　       　 8．Bottom seal washer　     9．Rocker　　　

10．Shaft of the worm wheel　　   11．Worm wheel　　　　    12．Inspection window cover

13．Back bearing housing of the worm

Note: the above installation sizes are for reference only; the actual sizes are based on sizes and actual things before orders.