The dry material comprises humic acid, soda ash, NPK compound fertilizer, kaolin, bentonite, white carbon black, carbon black, phosphogypsum and the like.
30 years of experience in drying engineering, specializing in hollow blade dryers as the basic type, focusing on the continuous innovation of RD drying equipment and the continuous expansion of application fields, has accumulated rich engineering experience for the technical team.
Adhere to the research concept of large-scale, more energy-saving, environmentally friendly and safer RD multi-level multi-effect drying equipment. So far, various series of RD multi-level multi-stage multi-effect drying devices have been developed and applied to engineering practice in various working conditions.
Step 1: Split cylinder
Step 2: Wet dust collector
Step 3: Cooling tower
What is the working principle of the sludge dryer?
The working principle is that the dewatered sludge enters the mixer from the sludge funnel, and the sludge which has been dried is fully mixed in proportion, so that the solid-mixed sludge has a solid content of 50% to 60%, and then The screw conveyor is transported to a three-channel drum dryer. The dried sludge is sent to the separator by a screw conveyor with a metering device. The humid hot gas discharged from the dryer in the separator is collected for thermal recovery, and the contaminated malodorous gas is sent to the biological filter for treatment. The discharge standard for environmental protection requirements, the granularity of the dry sludge discharged from the separator can be controlled, and the sludge particles satisfying the requirements are sent to the storage warehouse for processing by the filter.
Consulting purchase process
What problems need to be solved for sludge drying and incineration
First, the choice of high temperature flue gas parameters
The higher temperature heat source is beneficial to the drying process, while the flue and drying equipment has a limited ability to withstand the temperature of the flue gas. If the temperature of the extracted flue gas is too high, the boiler output will also have an adverse effect. Therefore, the high temperature smoke Gas parameters should be properly selected.
Second, the choice of drying equipment
Reasonable drying equipment (recommended to use RD sludge dryer), first of all to adapt to the layout space of the site, to achieve the purpose of transporting the blending after the sludge is dried, and at the same time take into account the operational performance requirements such as energy consumption and noise.
Third, the design of the transport blending process
As with the choice of drying equipment, the drying sludge conveying equipment should also be adapted to the limited space of the site and integrated with the existing coal handling equipment.
Fourth, the impact on the operation of the unit
In order to ensure the safe operation of the generator set, the interference of the start-stop of the drying system to the normal and stable combustion of the boiler should be as small as possible.
5. Prevention and control of secondary pollution
The design of the sludge drying system should fully consider and avoid the secondary pollution problem of the drying and conveying process to the environment of the power plant production area and the sludge drying workshop.
What is the working principle of fluidized bed sludge drying technology?
In the process of sludge drying (sludge drying is best to use RD sludge dryer), the dewatered sludge is sent to the sludge metering storage bin, and then the sludge pump is used to send the sludge to the fluidized bed sludge dryer. The feed port in the middle and distribute the sludge. The fluidized bed sludge dryer consists of three parts from the bottom to the top. At the bottom of the dryer is a bellows for distributing the circulating gas to different areas of the fluidized bed unit with a special gas at the bottom. A distribution plate for dispensing inert fluidizing gas. In the middle section, the heat used to evaporate the water will be fed into the fluidized bed by heating the hot oil. The uppermost part is a suction hood for separating the fluidized dry particles from the circulating gas, and the circulating gas leaves the dryer with sludge fines and evaporated water.