Production of sludge dryer

NegotiableUpdate on 02/16

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

The domestic sludge dryer equipment is equipped with a stirring blade inside, which enables the wet material to fully contact the heat carrier and hot surface under the stirring of the blade, thereby achieving the drying purpose of the low-speed stirring dryer. The structural form is generally horizontal, double axis or four axis. It can indirectly heat or cool paste, granular, powdered, and slurry materials, and can complete unit operations such as drying, cooling, heating, sterilization, reaction, and low-temperature combustion. The special wedge-shaped stirring heat transfer blade in the equipment has heat transfer efficiency and self-cleaning function of the heat transfer surface. It has been successfully used in fields such as food, chemical, petrochemical, dye, industrial sludge, etc.

Product Details

Process flow:

The DIY stage is sludge concentration, with the main purpose of initially reducing the volume of sludge and reducing the capacity of subsequent treatment structures or equipment; The second stage is sludge digestion, which decomposes the organic matter in the sludge; The third stage is sludge dewatering, which further reduces the volume of sludge; The fourth stage is sludge disposal, which involves using a certain method to dispose of the final sludge.

effect

The moisture content of the sludge is very high before it dries, and the remaining sludge has a moisture content of 99.2% to 99.5%. After passing through the concentration tank, the moisture content of the sludge is 95-97%, and after pressure filtration, the moisture content is around 80%. The reason for reducing the moisture content and sludge drying is that firstly, the sludge production in sewage treatment plants is relatively large, and the sludge volume must be reduced for convenient transportation and treatment in the future. Secondly, many domestic sludge treatments are transported to landfill plants by landfilling, reducing the volume can also save space for landfill plants. Thirdly, the sludge needs to undergo some treatment before drying before it can be used as fertilizer and building materials.

working principle
Domestic sludge dryerWedge shaped hollow blades are densely arranged on the hollow shaft, and the heat medium flows through the blades through the hollow shaft. The heat transfer area within a unit effective volume is large, and the temperature of the heat medium ranges from -40 ℃ to 320 ℃. It can be steam or liquid, such as hot water, thermal oil, etc. Indirect conduction heating does not carry away heat with air, and the heat is used to heat the material. The heat loss is only the heat dissipation to the environment through the insulation layer of the device body. The wedge-shaped blade heat transfer surface has self-cleaning function. The relative motion between the material particles and the wedge-shaped surface produces a scrubbing effect, which can wash away the attached material on the wedge-shaped surface and maintain a clean heat transfer surface during operation. The shell of the blade dryer is Ω - shaped, and generally two to four hollow mixing shafts are arranged inside the shell. The shell has sealed end caps and upper caps to prevent material dust leakage and fully exert its function.

Domestic sludge dryerThe heat transfer medium flows through the shell jacket and hollow stirring shaft through the rotary joint, and the hollow stirring shaft has different internal structures according to the type of heat medium to ensure the heat transfer effect.

Performance Characteristics
Low energy consumption of the blade dryer: Due to indirect heating, there is no large amount of air carried away to remove heat. The outer wall of the dryer is also equipped with an insulation layer. For slurry materials, only 1.2 water vapor is needed to evaporate 1kg of water.
The cost of the blade dryer system is low: it has a huge heat transfer surface per unit effective volume, which shortens processing time and reduces equipment size. It has greatly reduced the building area and space.
◎ Wide range of material processing: Using different heat media, it can handle both thermosensitive materials and materials that require high-temperature treatment. Common media include steam, thermal oil, hot water, cooling water, etc.
It can operate continuously or intermittently and can be applied in many fields.
Low environmental pollution: No use of portable air, minimal dust and material entrainment. The solvent evaporation of the material is very small, making it easy to handle. For materials with pollution or operating conditions that require solvent recovery
Closed loop circulation.
Low operating costs: minimal wear and tear, low maintenance costs.
Stable operation: Due to the special compression expansion stirring effect of the wedge-shaped blade, the material particles are fully in contact with the heat transfer surface. In the axial range, the temperature, humidity, and mixing gradient of the material are very small, thereby ensuring the stability of the process.

Technical Specifications

type number	JYG-9	JYG-13	JYG-18	JYG-25	JYG-32	JYG-41	JYG-52	JYG-68	JYG-81	JYG-95	JYG-110
Heat transfer area m2	9	13	18	25	32	41	52	68	81	95	110
Effective volume m3	0.32	0.59	1.09	1.53	1.85	2.8	3.96	5.21	6.43	8.07	9.46
Speed range r.p.m	5-15	5-15	5-15	5-13	5-13	5-13	5-13	5-13	5-10	5-10	5-9
merit Rate kw	4.0	5.5	7.5	11	15	18.5	22	30	45	55	75
Body width A mm	580	720	940	1100	1160	1280	1450	1640	1840	2190	2250
Total width B mm	841	1066	1320	1450	1474	1676	1854	2134	2286	2350	2668
Body length C mm	2800	3200	3500	4100	4500	4800	5200	5800	6200	6300	6500
Total length D mm	4876	5486	5918	6147	6808	7570	8306	9296	9678	9704	9880
Inlet and outlet distance E mm	2540	2780	3020	3650	4110	4420	4750	5350	5700	5800	5950
Center height F mm	450	530	610	760	760	880	1050	1220	1220	1400	1450
Total height G mm	950	1100	1350	1600	1600	1720	1830	1960	2200	2500	2600

Note: Some parameters may be adjusted according to different materials during design, and the design shall prevail.

Operating procedures:

1. Check before startup

a. Fill each oil cup with lubricating grease, start the motor idling, and listen for the noise to see if it is normal. If it is not normal, check the source of the abnormal noise and eliminate it.

b. Turn on the heat source: If the heat source is a thermal oil furnace, turn on the oil pump and electric heating tube in sequence (check whether the cylinder, pipeline connection, inlet and outlet are leaking or blocked, whether the pressure is normal, and whether the thermometer is sensitive. If there is any abnormal situation, stop heating immediately: if the heat source is a thermal oil furnace, stop heating immediately, and then stop the oil pump), and then troubleshoot.

c. Check if all instruments, buttons, and indicator lights in the electrical control cabinet are functioning properly, verify if the grounding circuit is in good condition, and check for any leakage or short circuits.

2. Close the power switch, start the motor, and the dryer begins to rotate.

3. After the material is dried, turn off the heat source first, and wait for the material to cool down before the motor rotates out the material.

4. It is strictly prohibited to put hands or other objects into the dryer when the whole machine is running or not stopped.