The hollow paddle dryer is a horizontal structure drying equipment with heat conduction.
The drying of the equipment relies on indirect heating by heat conduction. so the drying process requires no or only a small of gass to remove moisture. It greatly reduce the heat loss taken away by the airflow, inproves the heat utilization rate, and is an energy-saving drying equipment. The paddle dryer is widely used in the drying of powder, granular, filter cake and slurry materials in petrochemical, chemical, metallurgy, food, medicine, pesticine and other industries.Indirect heating or cooling of paste, granular, powder and slurry materials can complete unit operations such as drying, cooling, heating, sterilization, and reaction. The special wedge-shaped stirring heat transfer blade in the equipment has high heat transfer efficiency and self-cleaning function of the heat transfer surface.
Principle:
The heat transfer surface of the hollow paddel dryer has several parts such as blades, stirring shafts, and a large heat transfer area per unit volme. In addition, stirring and mixing make the materials violently turn, so as to obtain a high heat transfer coefficient, so the floor space and space are very small, saving the cost of plant infrastructure. In the drying process, the gas consumption is small. the flow rate is low. and the amount of dust carried away by the gas is small, so the gas dust recovery after drying is comvenient, and the recovery equipment in small in size, which can save equipment investment. For drying processes that require solvent recovery, the solvent concentration can be greatly increased. Due to the special stracture of the paddle, the material is alternately squeezed and relaxed during the drying process, which strengthens the drying process. The filling rate of the material in the drying room is very high, which can reach 80%-90%. The residence time of the material can be adjusted by adjusting the parameters such as the feeding speed, the rotating speed of the stirring shaft, and the filling degree of the material, and can be adjusted arbitrarily from a few minutes to a few hours. In addition, the movement of the material from the feeding port to the discharging port in the dryer is basically a piston motion, and the residence time distribution is narrow, so the moisture content of the product is uniform. The paddle has a certain axial angle on the stirring shaft, so it can continuously dry the material.
Features:
The equipment has a compact structure, a small footprint, and a large effective heat transfer area: a large heat transfer surface per unit of eccective volume.
The balde shafts can be meshed with each other, which has a self-cleaning effect and can prevent materials from sticking to the wall.
Low energy consumption per unit evaporation, low operating cost, indirect heating, closed heating, heating the material partition, high energy efficiency and utilizaion.
The low speed of the blade shaft does not damage the shape and properties of the product.
The operation of the equipment is flexible, the operation is stable and reliable, it can be operated continously or intermittently, and it can be applied in many fields.
Hollow Paddle Dryer,Hollow Blade Dryer,Hollow Paddle Drying Machine,Hollow Paddle Dryer Machine Jiangyin Jirui Machinery Manufacturing Co,LTD , https://www.jiruimachine.com
The conditions for pesticide production access include various aspects such as enterprise layout, production equipment, process technology and products, environmental protection facilities, quality assurance system, safety and health, and personnel qualifications. Among them, the emphasis on environmental protection and safety and health is particularly prominent.
In terms of enterprise layout, access requirements require newly established first-level pesticide production enterprises to be built in industrial clusters that have been approved by the provincial-level and higher-level departments and pass regional environmental impact assessment; newly established secondary pesticide production enterprises must stay away from Crowd gathered area. Before the construction of the factory, the pesticide company shall provide the general plan of the enterprise that has applied for approval. The location of the auxiliary facilities such as the production workshop, raw materials and product storage, fire control, "three wastes" treatment, and public works shall be marked.
In terms of production facilities and process technology, access conditions require the use of energy-saving and environment-friendly equipment. If the chemical synthesis requirements for synthetic drugs involve sulfonation, nitrification, chlorination, diazotization, oxidation, hydrogenation, peroxidation, fluorination, ammoniation, pyrolysis, and high pressure reactions, an automatic control and safety interlock system must be set up. And equipped with reliable alarm facilities. The requirements for environmental protection facilities have also been strengthened in the processing of pesticide formulations. For example, powder preparations and granules are required to have a dust removal system, and a negative pressure isolation space should be provided at the feed inlet.
For the collection and processing of “three wastesâ€, there are more specific rules for access conditions. For example, the ground of a solid waste collection site should be treated with anti-seepage treatment, surrounded by cofferdams, rainproof and fireproof measures; the collection of liquid waste requires separate collection of rainwater, domestic sewage and production sewage; the collection of gaseous waste requires that all are toxic and have The odor, solvent, dust overflow material feed and outlet should be set exhaust devices, and effective treatment of tail gas.
In terms of safety and health, it is required that pesticide production enterprises should be equipped with fire-fighting equipment that conforms to the nature of production, have ventilation and strong exhaust ventilation facilities that meet the production needs, and install eyewashers and emergency shower facilities in the production workshop, and should train relevant emergency personnel. The production, storage and transportation of chemicals shall comply with the regulations and be approved by relevant departments. An emergency rescue plan and command system for accidents shall be established.
According to the introduction of Cao Chengyu, the deputy secretary-general of the China Pesticide Industry Association, from the perspective of comments and feedback, the final "Pesticide Production Entry Conditions" will not be greatly modified in terms of environmental protection, safety and health, etc., and the access conditions will be applicable to the pesticide industry. Energy-saving and emission-reduction and protection of ecological environment and human health play a catalytic role.
The Public Consultation on the “Pesticide Production Approval Requirements†issued by the Ministry of Industry and Information Technology ended on November 10th. The reporter learned from the interview with the China Pesticide Industry Association that participated in the drafting work that as a major focus of the draft, the Content such as safety and safety has been widely recognized by the pesticide industry and will become a "requisite for entry of pesticide production."
October 11, 2023