Sludge Dryer
Industrial Rotary Sewage Sludge Drying Machine for Wastewater Treatment Plant
Sludge Dryer is a professional environmental protection drying equipment specially developed for high-viscosity, high-moisture sewage sludge. Adopting upgraded paddle stirring and gradient low-temperature drying technology, it perfectly solves the caking, wall-sticking and incomplete drying problems of traditional dryers for sludge materials. It can dry 80%-85% high-humidity raw sludge to 10%-15% safe moisture, realizing sludge volume reduction, harmless treatment, deodorization and resource reuse.
Paddle Stirring
Zero Caking
Eco-Friendly
What is Sludge Dryer?
Municipal domestic sewage, industrial wastewater treatment and printing & dyeing production will produce a large amount of wet sludge. Fresh sludge has extremely high moisture content (80%-85%), strong viscosity, peculiar odor, and contains organic pollutants and harmful bacteria. Direct stacking and landfill will cause serious soil and water pollution, and the transportation and disposal costs are extremely high, which has always been a major environmental protection problem for wastewater treatment plants.
Traditional ordinary rotary dryers lack anti-stirring structure, which cannot handle sticky sludge effectively, prone to material agglomeration, drying dead zones and serious wall sticking, resulting in low drying efficiency and unqualified finished products. Our upgraded Industrial Sludge Dryer is equipped with exclusive built-in anti-caking stirring paddles and adopts low-temperature mild drying process. It forcibly disperses sticky sludge, eliminates drying dead angles, avoids high-temperature harmful gas volatilization, and efficiently completes sludge dehydration, deodorization and sterilization. The dried sludge can be reused for incineration power generation, brick making, soil improvement and other purposes, turning environmental waste into reusable resources.
Contents
Complete Equipment Composition of Sludge Dryer
1. Anti-Caking Paddle Stirring Rotary Drum (Core Upgrade)
Different from ordinary dryers, the core drum is equipped with multi-group adaptive stirring and crushing paddles. Aiming at the high-viscosity characteristics of sewage sludge, it continuously breaks bulk sludge clusters and sticky attachments during operation, completely solving the industry pain points of material wall sticking, agglomeration and central black hole dead zones. The optimized lifting plate and paddle hybrid structure ensures that all sludge particles are fully flipped and dispersed, maximizing hot air contact area and realizing uniform and thorough drying.
2. Special Anti-Blocking Sludge Feeding System
Matched with professional viscous sludge quantitative feeding device, specially designed for high-humidity and sticky sludge materials. The variable-frequency feeding mode automatically adjusts the feeding speed according to sludge viscosity and humidity, effectively avoiding blockage, accumulation and intermittent feeding. Stable and uniform feeding provides continuous and balanced operating conditions for the drying system, ensuring consistent and stable drying effect of each batch of sludge.
3. Gradient Low-Temperature Environmental Protection Drying System
Adopting 40-75℃ low-temperature gradient drying process exclusive for sludge treatment, abandoning the high-temperature baking mode of traditional dryers. Low-temperature mild dehydration effectively inhibits VOCs volatilization and harmful gas escape, avoids secondary pollution, and retains the physical properties of sludge materials. The three-stage drying process of pre-dehydration, deep drying and constant-temperature shaping ensures that the internal and external moisture of sludge is uniform, meeting the harmless treatment standards.
4. Integrated Deodorization & Dust Removal Purification System
The whole machine adopts fully sealed micro-negative pressure operation structure to prevent odor and dust overflow during sludge drying. Equipped with professional tail gas deodorization and pulse dust removal equipment, it effectively decomposes peculiar smell and collects fine sludge powder. All exhaust gas and flue gas are purified and then discharged, fully complying with international environmental protection emission standards, realizing zero secondary pollution in the drying process.
5. Waste Heat Recovery & Energy-Saving Circulation System
Equipped with an intelligent waste heat circulation recovery device, which recycles the exhausted hot air after heat exchange for secondary heating. It greatly reduces fuel and power consumption, and the comprehensive energy-saving rate is more than 40% higher than that of traditional sludge drying equipment. It effectively reduces the long-term operating cost of sludge treatment projects and improves project economic benefits.
6. Intelligent Sludge Adaptive PLC Control System
Presets exclusive drying parameter models for municipal sludge, industrial sludge and printing & dyeing sludge. The system intelligently adjusts drum speed, paddle stirring frequency and hot air temperature in real time according to sludge moisture and viscosity. It has overload protection, anti-blocking alarm, temperature monitoring and fault self-diagnosis functions, supporting 24-hour unmanned continuous and stable operation.
Core Product Advantages of Sludge Dryer
1. Built-In Paddle Stirring, Zero Caking & Zero Dead Zone
The unique paddle forced dispersion structure fundamentally solves the problem of sticky sludge agglomeration and wall sticking that plagues traditional dryers. The adaptive stirring and crushing design breaks all bulk sludge clusters, realizes full hot air contact inside the drum, eliminates drying dead zones, and ensures uniform drying of sludge materials without wet cores.
2. Low-Temperature Drying, Harmless & Eco-Friendly
Adopting mild low-temperature drying technology below 75℃, it avoids high-temperature decomposition of organic matter and VOCs harmful gas volatilization. It completes physical deodorization and high-temperature sterilization while dehydrating sludge, thoroughly kills harmful bacteria and parasite eggs in sludge, meets global sludge harmless treatment standards, and has no secondary pollution.
3. Super High Volume Reduction Rate
This industrial sludge dryer can reduce sludge moisture from 80%-85% to 10%-15% stably. The sludge volume is reduced by 60%-70%, and the weight is reduced by more than 50%, which greatly reduces the floor space, transportation cost and landfill disposal cost of sludge. It is the most cost-effective way for large-scale sludge reduction treatment.
4. Strong Material Adaptability & Wide Application
It can process various types of sludge materials, including municipal sewage sludge, industrial wastewater sludge, printing and dyeing sludge, chemical sludge, river pond sludge and biological sludge. It can adapt to different viscosity and moisture sludge, realizing one machine for multiple purposes, and meeting the diversified sludge treatment needs of environmental protection projects.
5. Ultra Energy-Saving & Low Operating Cost
Matched with waste heat recovery circulation system and optimized hot air circulation design, the thermal efficiency is greatly improved and the comprehensive energy consumption is reduced by more than 40%. The equipment has a reasonable mechanical structure, few vulnerable parts, low failure rate and simple daily maintenance, which effectively reduces the long-term operation and maintenance cost of the project.
6. Fully Automatic & Stable Continuous Operation
Intelligent PLC automatic control realizes one-key start and 24-hour unmanned continuous production. The system automatically matches parameters according to material conditions, with high degree of automation and low labor cost. The whole equipment runs stably for a long time, which is very suitable for large-scale, long-term and standardized sludge treatment projects of environmental protection enterprises.
Working Principle & Production Process of Sludge Dryer
Working Principle
The Industrial Sludge Dryer adopts paddle anti-caking forced dispersion + low-temperature gradient environmental protection drying principle. High-viscosity wet sludge is stably sent into the rotary drum through the special anti-blocking feeding system. The built-in high-speed stirring paddles continuously break and disperse sticky sludge clusters to avoid wall sticking and agglomeration.
With the rotation of the drum, the sludge is fully flipped and scattered, and contacts with low-temperature hot air flow in all directions. Through three-stage gradient mild drying, surface free water, internal bound water and residual moisture are removed step by step. Synchronous deodorization and sterilization are completed during the drying process to eliminate harmful substances and peculiar smell. Finally, dry, loose and qualified low-moisture sludge is discharged stably, realizing harmless, reduced and resource-based treatment of sludge.
Standard Production Flow
Wet Sludge Feeding → Anti-Blocking Quantitative Conveying → Paddle Forced Breaking & Dispersion → Low-Temp Gradient Dehydration → Deodorization & Sterilization Purification → Waste Heat Recovery Circulation → Dry Sludge Discharging → Sludge Resource Reuse & Harmless Disposal
Application Scenarios of Sludge Dryer
This high-efficiency environmental protection Sludge Dryer is widely used in municipal wastewater treatment plants, industrial sewage treatment stations, printing and dyeing factories, chemical plants, environmental protection sludge disposal centers and circular economy projects. It is specially used for harmless reduction treatment of various high-viscosity sludge. The dried sludge can be used for incineration power generation, building materials production, soil remediation and other purposes, effectively solving the environmental pollution and high-cost disposal problems of sludge accumulation, and providing efficient and economical sludge recycling solutions for global environmental protection projects.
Core Application Fields: Municipal sewage sludge treatment, industrial sludge reduction disposal, printing & dyeing sludge recycling, environmental protection engineering project, wastewater plant supporting equipment, sludge resource utilization
FAQs of Sludge Dryer
Q1: What types of sludge can this dryer process?
A: It adapts to almost all common sludge materials, including municipal sewage sludge, industrial wastewater sludge, printing & dyeing sludge, chemical sludge, biological sludge and river sludge. It is a multi-functional professional sludge reduction and harmless treatment equipment.
Q2: Can it solve the problem of sticky sludge caking and wall sticking?
A: Yes. Equipped with exclusive built-in stirring and crushing paddles, it forcibly disperses sticky sludge clusters, completely eliminates material agglomeration and wall sticking problems, removes drying dead zones, and ensures uniform and thorough drying of all sludge materials.
Q3: Why choose low-temperature drying instead of high-temperature drying?
A: Low-temperature drying below 75℃ can effectively prevent high-temperature decomposition of organic matter in sludge and VOCs harmful gas volatilization, avoid secondary air pollution. It can retain the recyclable value of sludge, with safer and more environmentally friendly treatment effect.
Q4: What is the sludge reduction effect after drying?
A: After drying 80%-85% wet sludge to 10%-15% moisture, the sludge volume is reduced by 60%-70% and the weight is reduced by more than 50%. It greatly reduces the occupied space, transportation volume and landfill disposal cost, with excellent reduction effect.
Q5: Is the drying process environmentally friendly and pollution-free?
A: Yes. The whole machine adopts fully sealed micro-negative pressure operation, matched with professional deodorization and dust removal purification system. No odor or dust overflows during operation, all tail gas is up to standard discharged, meeting global environmental protection requirements for sludge treatment.
Global Project Cases Of Sludge Dryer
Case 1: 10T/H Municipal Sludge Drying Project | Thailand Urban Sewage Treatment Plant
Project Info: The customer needs large-scale harmless treatment of municipal sludge with 82% high moisture. Traditional dryers have serious caking and incomplete drying. Our paddle anti-caking sludge dryer realizes uniform drying, with finished sludge moisture stably controlled at 12%. The low-temperature environmental protection process meets local strict emission standards, and the sludge volume is reduced by 65%, greatly saving landfill and transportation costs.
Case 2: 6T/H Industrial Chemical Sludge Treatment Project | Malaysia Environmental Protection Factory
Project Info: The customer’s chemical sludge has high viscosity and contains peculiar smell and trace harmful substances. Our low-temperature drying technology avoids harmful gas volatilization, and the integrated deodorization and dust removal system realizes zero pollution discharge. The dried sludge meets industrial waste disposal standards and can be reused for building materials processing, realizing waste resource recycling.
Case 3: 15T/H Printing & Dyeing Sludge Drying Project | Indonesia Textile Industrial Park
Project Info: The industrial park produces a large amount of printing and dyeing sludge every day, which is difficult to store and dispose of. Our full-automatic sludge dryer runs stably for 24 hours, with strong adaptability to dyeing sludge. The energy-saving waste heat recovery system reduces operating costs, and the harmless treatment process solves the environmental protection pressure of the park, with remarkable economic and environmental benefits.
Technical Parameters of Sludge Dryer
| Project unit | φ2.0×6m | φ2.5×6.5m | φ2.7×7m | φ3×7m | φ3.2×7m | φ3.6×8m | Φ3.6×12m | |
| Cylinder volume （m3） | 18.84 | 31.89 | 40.5 | 49.46 | 56.26 | 81.38 | 118 | |
| Cylinder rotation speed (rpm) | 3-10 | 3-10 | 3-10 | 3-10 | 3-10 | 3-10 | 3-10 | |
| Material residence time (min) | 12-30 | 12-30 | 12-30 | 12-30 | 12-30 | 12-30 | 12-30 | |
| Raw material moisture (%) | 6-25 | 6-25 | 6-25 | 6-25 | 6-25 | 6-25 | 6-25 | |
| Final moisture content (%) | ≤1 | ≤1 | ≤1 | ≤1 | ≤1 | ≤1 | ≤1 | |
| Maximum intake temperature (℃) | 750-900℃ | 750-900℃ | 750-900℃ | 750-900℃ | 750-900℃ | 750-900℃ | 750-900℃ | |
| Capacity (T/H) | Slag | 20-25 | 25-30 | 30-35 | 35-40 | 40-45 | 50-65 | 70-85 |
| Fly ash | 10-17 | 17-21 | 20-25 | 23-27 | 25-30 | 30-45 | 45-63 | |
| Yellow sand | 20-27 | 25-40 | 27-45 | 30-45 | 35-50 | 55-75 | 75-99 | |
| Motor Type | Yr160m-4 | Yr132m-4E | Yr160m-4 | Yr160m-4 | Yr132m-5E | Yr160m-4E | Yr160m-4E | |
| Motor Power (Kw) | 7.5×2 | 11×2 | 7.5×4 | 7.5×4 | 11×4 | 15×4 | 18.5×4 | |
| Gear Box model | XWD-6 | XWD-6 | XWD-6 | XWD-6 | XWD-6 | XWD-8 | XWD-8 | |
| Speed Ratio of gear box | 17-29 | 17-29 | 17-29 | 17-29 | 17-29 | 17-29 | 17-29 | |
Get Custom Sludge Drying Solution
Our industrial Sludge Dryer breaks through the technical bottlenecks of traditional sludge drying equipment, with core advantages of paddle anti-caking dispersion, low-temperature environmental protection drying, high reduction rate and ultra energy saving. It provides one-stop harmless, reduced and resource-based treatment solutions for global municipal sewage plants and industrial environmental protection enterprises, helping customers solve sludge environmental protection problems and reduce project operating costs.
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