Belt Sludge Drying Solution Design
2024-10-30
Structure design and solution of Heat pump low temperature belt sludge drying equipment
Sludge refers to the waste material separated by precipitation after industrial and domestic wastewater treatment. Different industries produce different sludge. At present, industrial sludge includes acid washing sludge, electroplating sludge, steel and iron making sludge, alumina smelting sludge (red mud), oil field and refinery sludge, chemical and pharmaceutical sludge, paper making sludge, printing and dyeing sludge, tanning sludge, etc. Industrial sludge generally contains toxic and harmful substances, if not treated, deposited anywhere or directly landfill. It will cause secondary pollution to groundwater and ecological environment. Because industrial sludge generally contains toxic and harmful substances, it belongs to industrial hazardous waste, enterprises generally use qualified enterprises for treatment, which costs a lot of transportation costs and landfill disposal costs.
Reducing the moisture content of sludge is the key to solve the problems encountered in sludge treatment
Agricultural use
The moisture content of concentrated sludge is too high (92-96%), resulting in transportation difficulties and large transportation volume.
Dewatered sludge cake: the pollution composition should be controlled within the standard, and the difficulty of distribution needs to be supported by mechanical equipment, which has many difficulties in practical application.
Landfill
The moisture content of the dewatered sludge cake is high (70%-85%), and the soil mechanical properties are poor, so a large amount of soil needs to be mixed, which leads to a significant decrease in the volume utilization coefficient of the land. A reduction of moisture content to about 60% requires a large number of chemical agents (lime or flocculant) to increase the absolute drying capacity of the sludge.
Incineration
The direct incineration of dewatered sludge cake cannot maintain the natural process because of its low solid content, so auxiliary fuel needs to be added, and the processing cost increases significantly.Make building materials
The amount of dewatering sludge to make building materials is small, the heat consumption is high, and it is not economical.
The Xinjieyuan closed low-temperature belt sludge drying equipment is used for drying and dewatering, and the sludge weight is reduced by more than 75% in one step! The sludge is greatly reduced, and then handed over to qualified enterprises for landfill or harmless, resource treatment can not only greatly reduce the cost of hazardous waste treatment of enterprises, but also reduce the treatment process and cost of hazardous waste treatment enterprises, which is a win-win thing for all parties.
Working principle of belt dryer
Belt dryer is a common continuous drying equipment, its working principle is as follows:
1. Material feeding: the material enters the feeding port of the dryer through the feeding system and is evenly distributed on the belt conveyor.
2. Drying belt transmission: the belt conveyor will be dried materials to the drying room. In the process of transmission, the belt conveyor is in constant motion to transfer the material from the feeding end to the discharging end.
3. Heat transfer: the drying room is usually equipped with heating devices, such as gas heaters or electric heaters. Through the heating device, the hot air in the drying chamber is heated to form a hot air flow. Hot air flows through vents above or below the belt conveyor to transfer heat to the material. In the process of heat transfer, the material absorbs heat, so that its internal water evaporates, so as to achieve the effect of drying.
4. Dehumidification: The drying room is usually equipped with dehumidification equipment, such as cooler or moisture discharge system. Through the dehumidification equipment, the moisture in the drying room is cooled and condensed into water, and then discharged out of the dryer to maintain the humidity in the drying room
5. Discharge: after a certain drying time, the material is removed from the drying belt and leaves the dryer through the discharge port.
In general, the belt dryer uses the heating device to provide hot air flow by continuously transferring the material on the belt conveyor, evaporating the water inside the material, and reducing the humidity in the drying room through the dehumidification equipment, so as to realize the drying process of the material.
XXinjieyuan Environmental Protection Technology belt type sludge low temperature drying equipment is developed by using the principle of low temperature heat pump dehumidification, using the way of convection hot air drying to dewater and dry the wet sludge on the net belt. The whole system is fully closed design, and the dry hot air has no heat loss.
The structure of air energy heat pump belt dryer mainly includes
Air circulation system, heat pump system, heat exchanger, control system and housing composition. The air circulation system includes fan and air duct, which can circulate the air effectively and make the drying effect more even. Heat pump system is the core part of the equipment, it uses air energy heat pump technology to convert low temperature air into high temperature heat energy, to provide heat source for drying. The heat exchanger is used to transfer the heat energy generated by the heat pump system to the drying material to achieve efficient drying effect. The control system is responsible for monitoring and controlling the running state of the equipment to ensure the stability and safety of the drying process. The enclosure protects the equipment and ensures the normal operation of the equipment.
In terms of technology, air energy heat pump belt dryer has a variety of advanced technology. First of all, it uses a closed loop heat pump system, which can transfer the heat energy to the drying material in a continuous cycle, improving the energy utilization rate. Secondly, the dryer also has intelligent control function, which can be automatically adjusted and controlled according to the characteristics and requirements of drying materials, improving the drying effect and product quality. At the same time, it also has a variety of drying modes to choose from, such as constant temperature drying, variable temperature drying, etc., to meet the needs of different processes. In addition, the air energy heat pump belt dryer also has the characteristics of energy saving and environmental protection. Compared with the traditional drying equipment, it can save energy and reduce emissions, with lower operating costs and environmental pollution. Sludge drying equipment adopts heat pump technology, through heat energy transfer, condensation heat recovery method, is the actual efficiency is much higher than the traditional hot air drying technology (steam heating or combustion of natural gas), dehumidification energy consumption can be reduced by 40%-50%.
High efficiency heat recovery device is added inside, so that the cooling and heating efficiency can be replaced with full heat, and it is more efficient.
Air circulation in closed space, condensation and dehumidification, no waste heat emissions, effectively solve the problem of waste gas and odor emissions in the sludge drying process, and the equipment operation noise is low.
All in all, the air energy heat pump belt dryer has a wide application prospect in the drying industry because of its simple product structure and efficient process. With the increasing requirements on energy and environment, this drying equipment will become an important choice in the drying industry, providing reliable solutions for the drying needs of various fields.
Application of the Biological Deodorizer Treatment Systems
Working principle of belt dryer
Sludge drying has long been a challenge for wastewater treatment facilities, but with the introduction of belt dryers and other advanced drying equipment, the process has become more efficient and cost-effective. Our low-temperature waste zone sludge dryer is one such innovation that offers several advantages over traditional drying methods.
1.the main advantages of the low-temperature waste heat belt sludge dryer is that it can reduce the moisture content by more than 80%. This is a significant improvement compared to traditional drying methods, which often struggle to achieve such high levels of moisture reduction. The moisture content of dry mud is adjustable between 10% and 50%, providing greater flexibility for the drying process.
2.This innovative drying equipment uses "multiple condensation dehumidification and drying" technology to enhance its dehydration and dehumidification capabilities. This ensures that the sludge is effectively dried while also minimizing the formation of dust and other hazards. In fact, the dryer's low temperature operation (40-75°C) eliminates the risk of dust hazards and ensures a safer working environment. The discharge temperature is also kept low, below 50°C, without the need for secondary cooling, and dry sludge can be stored directly.
3.Another significant advantage of the low-temperature waste heat belt sludge dryer is the waste heat source design. This means that existing boiler steam, power plant waste heat or industrial waste heat can be used as heat sources for sludge drying. This not only reduces operating costs but also ensures efficient use of energy, making the drying process more sustainable.
4.When it comes to operating costs, low-temperature waste heat belt sludge dryers have lower operating costs than traditional drying methods. This equipment dries wet mud with a moisture content of 80% to mud with a moisture content of 20%, with power consumption as low as 40kW per hour. This makes it a cost-effective solution for wastewater treatment facilities looking to improve their sludge drying process.
5.The dryer system is completely sealed, preventing any odor emissions and eliminating the need for expensive deodorization systems. The closed design also means there is no heat loss, and the system achieves 100% heat utilization through heat pump heat recovery technology. This not only ensures energy efficiency but also reduces environmental impact.
6.The belt sludge dryers box is made of corrosion-resistant materials such as stainless steel, with long service life.
7.This low-temperature belt sludge dryers machine are Stable and safe operation, low management cost, simple operation and maintenance.
8.This low-temperature belt sludge dryerssystem is low energy consumption, small footprint, short construction cycle, short processing time.
In summary, the low-temperature belt sludge dryer represents a major advancement in sludge drying technology. With its strong drying weight loss capability, excellent dehumidification capabilities, safety features, waste heat utilization and cost-effectiveness, it provides a convincing solution for sewage sludge drying and treatment. This innovative drying equipment promises to revolutionize the sludge treatment industry by eliminating dust hazards, reducing operating costs and minimizing environmental impact.
Low temperature waste heat drying technology, mainly suitable for flue gas heat recovery, steam condensate, generator waste heat, anaerobic digestion (gas to hot water), industrial waste heat, sludge cracking gasification combustion to hot water and other working conditions. Xinjieyuan low-temperature waste heat has obvious advantages over independent heat sources. The utilization of waste heat can reduce the cost of sludge drying and improve the utilization rate of industrial waste heat. The wet sludge can be dried from 80% to 10%, and the minimum electricity consumption can reach 50KW/h.