Behafarin machine manufacturing group is designer and manufacturer of double-wall mixer (reactor) cylindrical (vertical) and horizontal for processing liquids and powders. In some powders, when they are mixed, it is necessary to be heated indirectly into the powder. This is done in a liquid-powder double wall mixing machine. In the second wall, which is protected, there is special oil that by inserting the special elements in the same wall, the oil inside it will reach the desired temperature. The main parts of these mixers are made of internal blades, shafts and bearing rollers like any ordinary mixer.
A nuclear reactor or atomic reactor is a device for regulating and controlling nuclear reactions. Liquid-powder double glazed mixing machine in laboratory size is used to produce radioactive isotopes, as well as generating electrical energy and producing neutrons. The size and design of the reactor varies according to their usage. The fission process by which a neutron is absorbed by a heavy core (high mass) and then split into two smaller nuclei, along with energy release and several other neutrons. The fission process by which a neutron is absorbed by a heavy core (high mass) and then split into two smaller cores, along with energy release and several other neutrons. A horizontal powder mixer machine is consisting of a motorized gear box, a tank in different volumes (50 to 5000 liters), a central shaft and two blades. The diameter of the main shaft that carries the blades is determined by factors such as density, size and type of material that varies between 40 to 150 mm. The main shaft, sub-shafts and ribbon blades are often made from the material that the tank is made from.
If the material is silica and abrasive, Iron is used to build a reservoir and for blades and shafts, stainless steel is used.
The blades are in four series (two large feathers and two small feathers) and are placed and move in two opposite directions. The larger blades direct the material from the two ends of the tank toward the center and the small blades, direct the material from center toward the two ends of the tank thus the product is thoroughly mixed together.
The tank door is three-piece and in order to prevent dust from mixing, a sealing tape will be placed underneath the door. The drainage door is located in the bottom and middle of the tank and can be constructed in either a slider or a damper. The outlet valve has the ability to connect to the screw conveyor or a funnel mechanism
can be fitted to fill the bag under the tank, or a horizontal Screw conveyor to transfer the powder to another point below the tank.
The height of the outlet valve can be designed from 30 to 130 centimeters (as required or ordered).
Liquid-powder double wall mixing machine is suitable for mixing any powder such as tea, coffee, spice, cake powder, cement, tile adhesive, additives in concrete, sports supplements and etc.
Please contact Behafarin machine manufacturing engineers for further advice.

Behafarin machine manufacturing company is manufacturer of Powder transfer machine; this machine is for transferring powdered materials from a reservoir to the desired point at different distances. The device functions by a shaft inside a tube that moves the materials through screw blades and all components that are in contact with materials are made of steel or iron. The powder transfer machine consists of a seamless pipe with different diameters and sizes, based on the powder transfer volume and its output efficiency that are built to the customer’s order. The transfer of powder on this device is carried out through blades around the axis of a pipe of a smaller diameter inside the larger tube. The powder transfer device (Hopper) allows you to install the flange into a powder chamber or mixer blender. The advantage of this system is to control the dust generated by the output of the mixer blender to the powder transfer input and it is also possible to connect the output of powder transfer device with the flange on bag filler or powder filler.
This system is driven by pneumatic jacks and damper and by placing an electronic eye it will cause the powder transfer device to move.
The device is fully made of steel and according to the customer’s request; it will also be made of iron.
Tube screw Powder transfer machine:
There is two types of powder transfer machine or screw: Cylindrical and u-shaped.
The screw machine is used for transferring various types of powder with different angles into filling machines or depot powder tanks.
This machine is manufactured in different lengths and its pipe diameter affects the speed and volume of powder transfer. Inside the pipe of powder transferring device, there is a screw that is used to transfer materials inside it.
Advantages of using powder transfer (Screw Conveyor):

  • Occupy the least space
  • Ability to transfer various materials
  • Transmission at all angles
  • Avoid wasting time compared to other methods
  • Avoid loss of product
  • Minimum maintenance and repair is needed
    Please contact Behafarin machine manufacturing engineers for further advice.

What is steel elbow joint?
What is the application of steel elbow joint?
۳۰۴ and 316 steel elbow joint from 1 to 6 inches that are made of welded and Mannesmann pipes are one of the Behafarin machine manufacturing products.
One of the most widely used joint is elbow joint that is produced in various sizes and grades. This type of fitting does not come with any particular complexity and is used to change the direction of the pipelines.
The carbon-steel and stainless steel elbow are divided into three categories in construction:

  • ۴۵ degree elbow
  • 90 degree elbow
  • 180 degree elbow
    To connect the pipeline, weak pressure elbow and high pressure elbow are divided into three particular groups:
  • BUTT WELD ELBOW
  • SOCKET WELD ELBOW
  • SCREW (NPT) ELBOW
    One of the most commonly used joints in the oil, gas and petrochemical industry is the stainless steel elbow that are used in carbon steel, stainless steel (304, 316) and alloys.
    Due to the fact that knee angles are known, the knees are produced from two knees with low and high radius:
  • SHORT RADUCE ELBOW
  • LONG REDUCE ELBOW
    Which are shown in the industry with the abbreviation of SR ELBOW and LRELBOW.
    Behafarin machinery company is manufacturer of weak pressure elbow, mostly welded and Mannesmann in the thickness of 10, 30, 40 sch.
    Please contact Behafarin machine manufacturing engineers for further advice.

If the drying time can be determined in some way, (In an existing drying unit or in a laboratory under conditions that are present in the dry condition) this time is used for mechanical design of the dryer, which is used for a small amount of drying when the material stays there longer than usual. The important thing here is the equality of the conditions in the dryer in a laboratory and the main dryer; this means that the drying time should be determined from an industrial scale dryer and compare with a semi-industrial design. Calculating the drying length is a factor that is associated with both mass transfer and heat transfer. The calculation method is such that the total amount of moisture content in the dryer is divided into a suitable number. These divisions include the preheating stages of the feed and the drying stage with a constant intensity and a drying step with descending intensity. If calculations are done using a computer, you can increase the number of divisions and increase the accuracy of computations. The designer of a dryer should consider each design with a single and distinct pattern; the designs of others can only be a guide.
The temperature of the feed and the air and the wet bubble is known, so The length of the preheating portion of the feed and the delivery of the feed to the bubble temperature and the constant drying portion are calculated by using the heat transfer coefficients (It is assumed that drying does not occur in the preheating portion of the feed) For calculating the length of the dryer, in which drying is carried out with a descending intensity, The mass transfer coefficient in length is required in terms of the function of moisture content. We can assume that constant heat transfer coefficient is same throughout the dryer. For calculating the total time Perhaps it’s better to first estimate the drying time, and then the length of the dryer.
Rotary dryer design
To design a rotary dryer, the following should be calculated:

  • Length and diameter of the dryer
  • Dryers Tilt
  • The amount of air necessary for drying
  • Required amount of the heat
  • Flow direction
  • The Number of cylinders per unit
    In order to obtain the above, we must have a series of information that includes:
  • Humidity and available air temperature
  • Moisture and temperature of the air exits from the heater
  • Humidity and temperature of the air exits from the dryer
  • Moisture input material
  • Product amount per unit
  • Product moisture content
    Please contact Behafarin machine manufacturing engineers for further advice.

Indirect rotary steam pipe dryer

Steam pipes heater are installed in symmetric and centrally aligned form in two or three rows and the dryer rotates with the cylinder. This steam pipes might be simple pipes that the steam is condensed while heating in them and this condensed water is discharged through the steam trap. The steam trap has ability to allow the
liquid to pass through but prevents the gas phase from escaping. The air coming out of the dryers is almost near saturated. Because the amount of air required in this dryer is usually much lesser than the amount of air consumed in direct typical dryers.

Indirect rotary steam pipe dryer
The hot steam enters the pipes and leaves it out after condensation. The dried material is removed from holes in the shell. These holes have walls that cause the depth of the bed inside the shell to always remain sufficient. These dryers are particularly suitable for drying the material, which need a long drying time and they can be kept at relatively long time at a constant temperature.

Powder filling machine

This dryer is more economical than direct dryer and it may be used for materials that are dry at high temperatures using a steam tube. For example, hot air with a temperature of 1200 to 1400 leaves it and enters a loop-shaped space and is in contact with solid matter and leaves it at a temperature of 140 to 180 degrees. Raw coal is generally dried in this way without being ignited or its dust explodes. The
approximate diameter of this dryer is only 3 to 10 (ft.) and its lengths vary from 2 to 100 ft.

The rotary dryer furnace contains a cylinder that rotates in the proper direction and it is merely horizontal.
The length of the cylinder is 4 to 10 times of the diameter, which may vary from 0.3 to 3 meters. Solids feed to the end of the cylinder and due to three factors of rotation, the difference in height and Cylinder slope, the finished product is removed from the other side.
Rotary dryers are divided into two groups:

  • Direct
  • Indirect
    A direct method is that when direct heat exchange occurs between solids, the temperature of solids increases or decreases but in indirect method the heat released from physical collision of solids goes to metal pipe.

Rotary dryers
Rotating drying furnace machine is one of the most important dryers used to dry granular solids that can have free flow and do not split in a significant amount of crushing. If the rotary dryer is equipped with a special machine that breaks solid
cakes, they can dry very sticky materials well. It is not suitable for drying thick liquids, glutinous materials, very sticky and gummy materials and materials that are slow to dry also sulfur content or lightweight materials that could easily be transported by airflow.
Rotating drying furnace machine is suitable for drying Chemical fertilizers such as sulfate, phosphate, and ammonium nitrate and potassium salts, as well as materials like minerals, gravel, limestone, clay.
The drying time in these dryers usually varies from 5 minutes to 1 hour and their capacity varies from several hundred kilograms to several hundred tons.
Schematic structure of a rotary dryer furnace consists of a horizontal rotating cylinder shell that is slightly inclined towards the outlet. The moist feed enters from one end of the cylinder and dried product exits from the other end. When the cylinder rotates, elevator blades lift solid materials and spray it into the hot air flow and the surface of solids is completely exposed to hot air therefor Drying is done more efficiently. At the entrance to the feed there are several spiral blades that help feed forward to reach the main curtain.
In humid environments, it is necessary that the inlet air be partially dehumidified and this can be done by the Absorption tower and adjacent to calcium chloride. Other related devices to this dryer include: Air warmer with direct or indirect flame, air flow adjusting channel, Dust collector and fans.
Rotary dryer theory
If the heat transfer directly occurs from the gas phase to the solid phase, it is called direct heat, and if the heat transfer from steam pipes to solids, it is called indirect
heat. If the direction of the gas phase and the solid phase are the same, it is called “favari” and if they are opposed to the direction, it is called mutual.
For materials that need to be heated to a higher temperature, such as minerals, sand, limestone, clay, etc., direct hot gas is used. For materials that should not be heated to a much higher temperature such as aluminous sulfate and sugar and chemical crystalline products, hot air is used.
Direct heating
Solid matters that are not concerned of contamination with combustion gas but they should not warm up to high temperatures such as Iron sulfide, gypsum and organic materials such as uncooked coal and agricultural materials, should cool in the parallel dryer.