How to choose a puffer?
According to the number of shafts of the puffing machine is one or two, it is divided into single-screw puffing machine and twin-screw puffing machine. Twin-screw extruder has a wide range of raw materials, low maintenance costs, energy saving and power saving features, can produce molding Good, beautiful appearance, uniform degree of maturity with feed such as: mink, fox and raccoon feed, aquatic materials, pet materials, tissue protein, etc., but also a variety of raw materials expansion: corn, soybeans, etc. and ordinary livestock and poultry feed, you can consider choosing the twin-screw extruder. If it is a small-scale farmers to deal with a variety of raw materials such as: corn, soybeans, etc. and ordinary livestock and poultry feed, choose a single-screw extruder can be. Select the three principles of the puffing machine:
First of all, it is clear whether to choose a dry puffer or a wet puffer.
Second, according to the output of the model.
Third, according to the quality, after-sales factory.
First, is it clear that the choice of dry puffing machine or wet puffing machine?
(A), the difference between dry puffing machine and wet puffing machine?
If you think that the puffing process with water is wet puffing, without adding water is dry puffing is wrong. Wet puffing machine is based on the dry puffing machine to increase the tempering device, its purpose is: to enhance the material temperature, soften and to mature materials, supplemented by a certain amount of water. Wet puffing than dry puffing high efficiency and spiral, puffing chamber wearing parts of long service life, the reason is: if the material puffing temperature of 130 ℃, dry puffing from room temperature (20 ℃) to 130 ℃ need to heat 110 ℃; if the wet production, tempering temperature of 80 ℃, only need to raise the temperature of the material of 50 ℃, so the wet puffing mechanical energy required less than dry puffing, more energy can be used to improve production; due to the material, the tempering device to soften and to ripen the material, supplemented with a certain amount of water. Can be used to improve production; due to the softening of the material, reduce the spiral, expansion chamber and other wear parts of the wear and tear, improve its service life.
(B), dry puffing and wet puffing advantages and disadvantages?
1, expanded soybeans
(1), puffing soybeans, urease activity is an important indicator, wet puffing control urease activity is more stable, can be accurately controlled between 0.02 ~ 0.2. Dry puffing soybean urease activity fluctuations, easy to appear uneven degree of ripening.
(2), the wet method of soybean efficiency, the same power, the wet method of soybean expansion than the dry method is more than twice as high, such as 90KW dry soybean production of 800 ~ 1000 kg, while the wet production of up to 1500 kg.
(3), wet puffed soybeans, the moisture of the product can be controlled at about 12%, while the dry puffed product moisture is generally about 8%.
Although the wet method of puffed soybean flour efficiency, but the dry method of the product aroma, enticing good, quite a lot of customers favor the dry method of puffed soybeans.
2, puffed corn
Wet and dry puffed corn when the efficiency difference is not as significant as soybeans, wet method than dry method to improve about 15% or so. Expanded corn is the main indicators of pasting degree and weight, according to the use of the product to determine whether the dry method of expansion or wet method of expansion. Dry puffed corn, puffing degree can be adjusted in a wider range, can reach a very high degree of puffing (finished product weight ≤ 300g / L), to meet the requirements of different users.
If puffed corn is used for special animal feed (mink, fox, raccoon, etc.), special animals require high degree of expansion (generally require a capacity of 0.3 or so), dry production should be used.
If puffed corn is used in the production of suckling pig feed, suckling pig feed requirements for puffed corn is lower than the special animal feed, general capacity of 0.4-0.5 between, paste degree of about 85% feeding effect is very good, wet and dry method can meet the requirements.
