LPG series high-speed centrifugal spray dryer

Product Introduction

Spray drying is widely used in liquid forming and drying industries. It is especially suitable for generating powdery and granular solid products from solution, lotion, suspension and paste liquid raw materials. Therefore, when the particle size distribution, residual moisture content, bulk density and particle shape of the finished product must meet high standards, spray drying is a better process.

Working principle

The air is filtered and heated, entering the top air distributor of the dryer, and the hot air enters the drying chamber in a spiral and uniform manner. The feed liquid passes through the high-speed centrifugal atomizer on the top of the tower body, and (rotating) spray into extremely fine mist like liquid beads, which can be dried into finished products in a very short time in parallel with hot air. The finished product is continuously output from the bottom of the drying tower and the cyclone separator, and the exhaust gas is discharged by the fan.

Performance characteristics

The drying speed is fast, and the surface area of the material liquid greatly increases after atomization. In the hot air flow, 95% -98% of the water can be instantly evaporated, and the drying time is only a few seconds. It is particularly suitable for drying heat-sensitive materials.
The product has good uniformity, fluidity, and solubility, high purity, and good quality.
The production process is simplified and the operation and control are convenient. For liquids with a moisture content of 40-60% (up to 90% for special materials), they can be dried into powder products in one go, without the need for crushing and screening after drying, reducing production processes and improving product purity. The particle size, bulk density, and moisture of the product can be adjusted within a certain range by changing the operating conditions, making it easy to control and manage.

Adapt to materials

Chemical industry: sodium fluoride (potassium), alkaline dye pigments, dye intermediates, composite fertilizers, formaldehyde silicic acid, catalysts, sulfuric acid agents, amino acids, white carbon black, etc.
Plastic resin: AB, ABS lotion, urea formaldehyde resin, phenolic resin, sealant (urea) formaldehyde resin, polyethylene, PVC, etc.
Food industry: Rich fat milk powder, gluten, cocoa milk powder, milk substitute powder, blood hunting powder, egg white (yolk), etc.
Food and plants: oats, chicken juice, coffee, instant tea, spice meat, protein, soybean, peanut protein, hydrolysate, etc.
Sugar: corn syrup, corn starch, glucose, pectin, maltose, potassium sorbate, etc.
Ceramics: alumina, ceramic tile materials, magnesium oxide, talc powder, etc.

Technical specifications

Model/Project/Parameters	5	25	50	150	200-2000
Inlet temperature	140-350 automatic control
Outlet temperature	80-90
Upper limit of water evaporation（kg/h）	5	25	50	150	200-2000
Drive type of centrifugal spray head	Compressed air transmission	mechanical drive
Upper limit of speed（r.p.m）	25000	18000	18000	15000	8000-15000
Spray disc diameter（mm）	50	120	120	150	180-240
heat source	electricity	Steam+Electricity	Steam+electricity, fuel oil, gas, hot air stove
Upper limit of electric heating power（kw）	9	36	72	99
Overall dimensions (length × wide × High)（m）	1.8×0.93×2.2	3×2.7×4.26	3.5×3.5×4.8	5.5×4×7	Determine based on actual situation
Dry powder recycling（%）	≥95

Note: The evaporation of moisture is related to the characteristics of materials and the temperature of hot air inlet and outlet. When the outlet temperature is 90oC, the water evaporation curve is shown in the above figure (for selection reference). As the product is constantly updated, relevant parameters are subject to change without prior notice.

Ordering instructions

◎ Material name and physical properties: solid content (or water content), viscosity, surface tension, pH value.
After drying, the powder capacity, allowable residual water content, particle size, and allowable upper temperature limit.
◎ Production and daily shift schedule.
◎ Energy supply: steam pressure supply, capacitance, and coal, oil, and gas supply.
◎ Control requirements: Do the inlet and outlet temperatures require automatic control.
◎ Powder collection requirements: Whether to install bag filters, environmental requirements for exhaust emissions.
◎ Other special requirements.

Technical specifications

size	A	B	C	D	E1	E2	F	G	H	I
LPG-25	1290	3410	4260	1800	1200	1200	1000	1700	1300	1550
LPG-50	1730	4245	5100	2133	1640	1640	1250	1750	1800	1600
LPG-100	2500	5300	6000	2560	2100	2100	1750	1930	2600	1780
LPG-150	2800	6000	7000	2860	2180	2180	1970	2080	3050	1960
LPG-200	2800	6600	7300	3200	2300	2300	2210	2250	3050	2100
LPG-300	2800	8000	8700	3700	2800	2800	2520	2400	3040	2250