KJG Series Hollow Blade Dryer-Jiangsu Yutong Drying Engineering Co. Ltd.

Vacuum and conduction drying series

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Vacuum and conduction drying series

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KJG Series Hollow Blade Dryer

hollow paddle dryer is a kind of heat conduction mainly horizontal stirring type continuous drying equipment. Due to the shape of the stirring blade paddle, said paddle dryer, also known as foreign trough stirring dryer or dryer.

Detailed description

Overview:

◇ hollow paddle dryer is a stirring blade inside the device settings, and the wet material in the stirring blade, full contact with the hot surface and the heat carrier, so as to achieve the purpose of the low-speed stirring drier, structure generally lying style, four-axis or dual-axis, special wedge-shaped stirring blade has a higher heat transfer efficiency and heat transfer surface self-cleaning function.

◇ hollow paddle dryer and hot air into conduction. I.e., hot air drying of the material is in contact with each other by means of a heat carrier (eg hot air) and dried with, the heat conduction in contact with each other but not the carrier material was dried in direct contact with the hot surface of the material. Conduction advantage is that the material can not easily be contaminated, displacement of small, high thermal efficiency, the volume is relatively small, is conducive to energy conservation and the prevention of air pollution.

working principle:

Hollow paddle dryer heat transfer surface have blades, stirring shaft parts, wall, etc., and leaves a large part of the heat transfer area, the equipment, compact structure, large heat transfer area per unit volume. In addition, the stirring and mixing the material turning violent, resulting in very high heat transfer coefficient, so the area is very small and space, saving the plant capital costs. Drying process with less gas, the flow rate is low, being less dust entrained gas, so convenient drying gas dust recovery, recycling equipment, small size, can save equipment investment. The need for recovery of the solvent drying process, can greatly improve the solvent concentration. Due to the special blade structure, the material received alternately squeezing and relaxation during the drying process, and strengthen the dry. A high rate of drying chamber filled materials, can reach 80% -90%, the residence time of materials by adjusting the feed rate, stirring shaft speed, full of material and other parameters is adjustable from a few minutes to a few hours be adjusted. In addition, the material in the dryer from the feed port to the outlet of a substantially piston movement, residence time distribution is narrow, and thus uniform product moisture content. Paddle agitator shaft having an axial angle, the material can be dried continuously.

Process Equipment Demo:

Structure:

In two-axle example to explain the structure (hollow paddle dryer can be divided into single, double, four). It consists of jacketed end faces W-shaped casing, cover, two bladed hollow shaft, end caps at both ends, through a rotary joint media, metal hose and gears, sprockets and other parts of the transmission mechanism comprises composition.

It is the core equipment and welding two hollow shaft stirring blade in the hollow shaft. Blade shape of a hollow semi-circular wedge, can pass into the heating medium. Apart from the stirring effect, but also the heat transfer body of the device. Heat two main beveled side of the blade, so when the material in contact with the slope, with the rotation of the blades, the particles quickly slid the incline, the heat transfer surface constantly updated, enhanced heat transfer. At the bottom of the blade has a triangular blade to the bottom of the material deposited on the shell blowing and prevent dead.

Blade arrangement and the size of each part have certain requirements, but also in the feed zone, drying zone, the discharge zone in addition to the blades, the other an auxiliary mechanism to ensure the stability of the whole operation, uniform drying. In addition, the residence time can also be adjusted.

Features:

Blade dryer is low energy consumption: Due to the indirect heating, not a lot of air to carry away the heat, the outer wall of the dryer and set the insulation layer of slurry material, only 1.2kg 1kg steam evaporate water.

Blade dryer is low cost system: has a huge heat transfer surface per unit effective volume, shortening the processing time, the device size becomes smaller. It greatly reduces the floor space and building space.

A wide range of materials handling: Use a different medium heat, can deal with heat-sensitive materials, but also need to deal with the high temperature treatment of materials. Common media are: steam, thermal oil, hot water and cooling water.

Continuous operation can also be intermittent operation can be applied in many fields.

Environmental pollution: do not use carry air, dust material entrained very little. Material solvent evaporation is very small, easy to handle. Of contaminated material or solvent to be recovered condition, it can be closed circulation.

Low operating costs: The device is operating normally, only 1-2 / day. Low speed agitation and reasonable structure, equipment wear amount is small, very low maintenance costs. 　

Operation stability: Due to the wedge-shaped blade special compression - expansion stirring, so that the material particles full surface contact with the heat transfer in the axial zone, material temperature, humidity, mixing gradient is very small, thus ensuring process stability.

application:

Paddle dryer has been successfully used in the food, chemical, petrochemical, dyes, industrial sludge and other fields. Heat transfer equipment, cooled, stirred solution of the following characteristics makes it possible to complete the unit operations: calcination (low temperature), cooled, dried (solvent recovery), heating (melting), the reaction and sterilization. Stirring blades while the heat transfer surface, so that the heat transfer area per unit effective volume is increased, the processing time is shortened. Wedge-shaped blade heat transfer surface and having a self-cleaning function. Compression - expansion of the material mixture evenly mixing function. Material axially into a "plug flow" movement in the axial zone, material temperature, humidity, mixing gradient is very small.

Used to do medium heat, paddle dryer low temperature calcination work to be completed. Such as: calcium sulphate dihydrate (CaSO4 • 2H2O) calcining is converted to calcium sulfate hemihydrate (CaSO4 • 1 / 2H2O). Sodium bicarbonate (NaHCO3) into calcined soda ash (Na2CO3) and the like.

Pass into a cooling medium, such as water, salt water, etc. can be used to cool the cooling. Such as: used in the soda ash industry paddle cooler base machine, replace the old air-cooled cooler base machine, energy saving and exhaust gas treatment equipment, reduce operating costs, but also for titanium, nickel-iron alloy powder and various granular powder cooling the material. In a single machine in the material can be cooled from 1000 ℃ to less than 40 ℃.

Drying, the main function of the device, do not use hot air, the solvent recycling, energy consumption, environmental control in the ideal state tractable. To be recovered solvents, flammable material is particularly heat-sensitive oxide adaptation. It has been widely used in chemical, petrochemical and dye industries.

Axial area, temperature, humidity, degree of mixing uniformity, so that the device can be used to heat or melt, some of the solid material or the reaction. It has been successfully used in the fertilizer industry and modified starch. Paddle dryer can be used for sterilization of food and flour. Unit effective volume of large heating area, will soon be heated to the sterilization temperature, avoiding prolonged heating to change the quality of materials.

Adaptation Material:

1, petrochemical industry: polyolefin powder, polycarbonate resins, high density polyethylene, linear low density polyethylene, polyacetal particles, nylon 6, nylon 66, nylon 12, cellulose acetate, polyphenylene sulfide , acrylic resin, engineering plastics, polyvinyl chloride, polyvinyl alcohol, polystyrene, polypropylene, polyester, polyoxymethylene, styrene - acrylonitrile copolymers, ethylene - propylene copolymers.

2, environmental protection industry: of PTA sludge, electroplating sewage sludge, boiler ash, pharmaceutical waste, waste sugar, monosodium glutamate factory waste, coal ash.

3, the feed industry: soy sauce residue, bone-based feed, distillers grains, food angle materials, pomace, orange peel, soybean meal, chicken feed, fish meal, feed additives, biological sludge of.

4, the food industry: starch, cocoa, corn, salt, modified starch, pharmaceuticals.

5, the chemical industry: soda ash, NPK fertilizer, kaolin, bentonite, white carbon black, carbon black, gypsum, oxidation sodium fluoride, nitrate, calcium, magnesium, sodium, aluminum hydroxide, barium sulfate, calcium sulfate, calcium carbonate, dyes, molecular sieves, saponin.

Schematic:

Technical specifications:

Model	KJG-2.7	KJG-9	KJG-13	KJG-18	KJG-24	KJG-29	KJG-36	KJG-41
Heat transfer area m2	2.7	9	13	18	twenty four	29	36	41
Effective volume m3	0.06	0.32	0.59	1.09	1.53	1.85	2.42	2.8
Speed range rpm	15-30	10-25	10-25	10-20	10-20	10-20	10-20	10-20
Power kw	2.2	4.0	5.5	7.5	11	11	15	15
Body width A mm	306	584	762	940	1118	1118	1296	1296
Total width B mm	736	841	1066	1320	1474	1474	1676	1676
Body length C mm	1956	2820	3048	3328	3454	4114	4115	4724
Total length D mm	2972	4876	5486	5918	6147	6808	6960	7570
Access to materials from the E mm	1752	2540	2768	3048	3150	3810	3810	4420
Center height F mm	380	380	534	610	762	762	915	915
Overall height G mm	762	838	1092	1270	1524	1524	1778	1778
N-inch steam inlet	(2) 3/4	(2) 3/4	(twenty one	(twenty one	(twenty one	(twenty one	(twenty one	(twenty one
Inch outlet O	(2) 3/4	(2) 3/4	(twenty one	(twenty one	(twenty one	(twenty one	(twenty one	(twenty one

Model	KJG-48	KJG-52	KJG-62	KJG-68	KJG-73	KJG-81	KJG-87	KJG-95	KJG-110
Heat transfer area m2	48	52	62	68	73	81	87	95	110
Effective volume m3	3.54	3.96	4.79	5.21	5.78	6.43	7.39	8.07	9.46
Speed range rpm	10-20	10-20	10-20	10-20	5-15	5-15	5-15	5-15	5-10
Power kw	30	30	45	45	55	55	75	75	95
Body width A mm	1474	1474	1651	1652	1828	1828	2032	2032	2210
Total width B mm	1854	1854	2134	2134	2286	2286	2438	2438	2668
Body length C mm	4724	5258	5410	5842	5461	6020	5537	6124	6122
Total length D mm	7772	8306	8865	9296	9119	9678	9119	9704	9880
Access to materials from the E mm	4420	4954	4953	5384	5004	5562	5080	5664	5664
Center height F mm	1066	1066	1220	1220	1220	1220	1220	1220	1220
Overall height G mm	2032	2032	2362	2362	2464	2464	2566	2566	2668
N-inch steam inlet	(2) 11/2	(2) 11/2	(2) 11/2	(2) 11/2	(2) 11/2	(2) 11/2	(2) 2	(2) 2	(2) 2
Inch outlet O	(2) 11/2	(2) 11/2	(2) 11/2	(2) 11/2	(2) 11/2	(2) 11/2	(2) 2	(2) 2

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