Description
Key words: pesticide DF dry suspending agent production line, pesticide DF dry suspending agent special pressure spray dryer, dry suspending agent dryer, DF dry suspending agent drying granulation equipment
Classification: agriculture and forestry industry
Case summary: DF dry suspending agent core technology and equipment is pressure spray drying tower. Based on material characteristics and years of production experience, Changzhou Hao Mei drying Engineering Co., Ltd. concentrates on the design of a new type of pesticide DF dry suspensions special pressure spray drying unit, which can complete the drying and granulation process at the same time. According to the requirements of the process, the pressure, flow rate and nozzle size of the material pump can be adjusted to obtain the desired size.
DF pesticide dry suspension concentrate:
As a new special pesticide formulation, DF dry suspension concentrate is widely used in pesticide, medicine and veterinary medicine because of its high efficiency, safety and environmental protection. The dry suspending agent can be obtained by dewatering and granulation. The manufacturing process is to mix raw materials, auxiliaries and so on, and then mix and grind the mixed materials. After grinding and adding granulating agents, the products are dried and granulated by pressure spray drying tower.
It is easy to see that the core technology and equipment of DF dry suspending agent is the pressure spray drying tower. According to the material characteristics and years of production experience, Changzhou Hao Mei drying Engineering Co., Ltd., concentrates on the design of a new type of pesticide DF dry suspensions special pressure spray drying unit, which can complete the drying and granulation process at the same time. According to the requirements of the process, the pressure, flow rate and the size of the nozzle can be adjusted to obtain the required spherical particles of a certain size.
The characteristics of DF dry suspension concentrate are as follows
1. The dry suspension agent dissolves in water and disintegrates rapidly with good dispersibility and suspension.
2. The medicine liquid particles are very fine and can be evenly attached to the surface of crops, with strong adhesion and resistance to rain erosion.
3. No dust, good fluidity, saving packaging materials, convenient transportation and storage;
4. Large scale continuous and green production with good production environment;
5. The reasonable distribution of the particle size of the solution can not only ensure the quick effect and sustained effect of the pesticide, but also ensure that the pesticide can fully contact with the surface of the crop, so as to improve the efficacy.
Principle of DF special dry spray dryer for dry suspensions
The air enters the air distributor at the top of the drying tower through the filter and heater, and then enters the drying chamber evenly in a spiral shape. The material liquid is pumped to the centrifugal atomizer on the top of the drying tower by the material tank through the filter, so that the material liquid is sprayed into a very small mist droplet. The material liquid contacts with the hot air in parallel flow, and the water evaporates rapidly, and it is dried into the finished product in a very short time. The finished product is discharged from the bottom of drying tower and cyclone separator, and the waste gas is discharged by fan. The powder is collected by the pollinator at the lower end of the cyclone separator. The fan outlet can also be equipped with a secondary dust removal device, and the recovery rate can reach 96-98%.
Advantages of DF dry suspension concentrate production line:
The drying speed is fast. After the centrifugal spray, the surface area of the material is greatly increased. In the high temperature airflow, the water content of 95%-98% can be evaporated instantaneously. The drying time is only a few seconds.
2.. The flow of droplets and hot air in the same direction can be made by adopting the combined flow spray drying method. Although the temperature of the hot air is relatively high, the hot air enters the drying chamber immediately to contact with the spray droplet, the indoor temperature drops sharply, and the wet bulb temperature of the material basically remains unchanged, so it is also suitable for drying the heat sensitive material.
3. According to the characteristics of materials, it can be used for hot air drying, centrifugal granulation and cold air granulation. Most products with different characteristics can be produced by this machine.
4. Because the drying process is completed in an instant, the particles of finished products can basically keep the spherical shape of droplets, and the products have good dispersibility, fluidity and disintegration. The temperature of the hot air is high, but because the hot air enters the drying chamber immediately, it contacts with the spray droplet, the indoor temperature drops rapidly, and the wet bulb temperature of the material is basically unchanged, so it is also suitable for drying the heat sensitive material.
The production process is simplified and the operation control is convenient. Spray drying is usually used for the solution with a solid content of less than 60%. After drying, it does not need to be smashed and screened. It reduces the production process and simplifies the production process. For the product particle size, bulk density, moisture, within a certain range, can change the operating conditions to adjust, control, management is very convenient.
Classification: agriculture and forestry industry
Case summary: DF dry suspending agent core technology and equipment is pressure spray drying tower. Based on material characteristics and years of production experience, Changzhou Hao Mei drying Engineering Co., Ltd. concentrates on the design of a new type of pesticide DF dry suspensions special pressure spray drying unit, which can complete the drying and granulation process at the same time. According to the requirements of the process, the pressure, flow rate and nozzle size of the material pump can be adjusted to obtain the desired size.
DF pesticide dry suspension concentrate:
As a new special pesticide formulation, DF dry suspension concentrate is widely used in pesticide, medicine and veterinary medicine because of its high efficiency, safety and environmental protection. The dry suspending agent can be obtained by dewatering and granulation. The manufacturing process is to mix raw materials, auxiliaries and so on, and then mix and grind the mixed materials. After grinding and adding granulating agents, the products are dried and granulated by pressure spray drying tower.
It is easy to see that the core technology and equipment of DF dry suspending agent is the pressure spray drying tower. According to the material characteristics and years of production experience, Changzhou Hao Mei drying Engineering Co., Ltd., concentrates on the design of a new type of pesticide DF dry suspensions special pressure spray drying unit, which can complete the drying and granulation process at the same time. According to the requirements of the process, the pressure, flow rate and the size of the nozzle can be adjusted to obtain the required spherical particles of a certain size.
The characteristics of DF dry suspension concentrate are as follows
1. The dry suspension agent dissolves in water and disintegrates rapidly with good dispersibility and suspension.
2. The medicine liquid particles are very fine and can be evenly attached to the surface of crops, with strong adhesion and resistance to rain erosion.
3. No dust, good fluidity, saving packaging materials, convenient transportation and storage;
4. Large scale continuous and green production with good production environment;
5. The reasonable distribution of the particle size of the solution can not only ensure the quick effect and sustained effect of the pesticide, but also ensure that the pesticide can fully contact with the surface of the crop, so as to improve the efficacy.
Principle of DF special dry spray dryer for dry suspensions
The air enters the air distributor at the top of the drying tower through the filter and heater, and then enters the drying chamber evenly in a spiral shape. The material liquid is pumped to the centrifugal atomizer on the top of the drying tower by the material tank through the filter, so that the material liquid is sprayed into a very small mist droplet. The material liquid contacts with the hot air in parallel flow, and the water evaporates rapidly, and it is dried into the finished product in a very short time. The finished product is discharged from the bottom of drying tower and cyclone separator, and the waste gas is discharged by fan. The powder is collected by the pollinator at the lower end of the cyclone separator. The fan outlet can also be equipped with a secondary dust removal device, and the recovery rate can reach 96-98%.
Advantages of DF dry suspension concentrate production line:
The drying speed is fast. After the centrifugal spray, the surface area of the material is greatly increased. In the high temperature airflow, the water content of 95%-98% can be evaporated instantaneously. The drying time is only a few seconds.
2.. The flow of droplets and hot air in the same direction can be made by adopting the combined flow spray drying method. Although the temperature of the hot air is relatively high, the hot air enters the drying chamber immediately to contact with the spray droplet, the indoor temperature drops sharply, and the wet bulb temperature of the material basically remains unchanged, so it is also suitable for drying the heat sensitive material.
3. According to the characteristics of materials, it can be used for hot air drying, centrifugal granulation and cold air granulation. Most products with different characteristics can be produced by this machine.
4. Because the drying process is completed in an instant, the particles of finished products can basically keep the spherical shape of droplets, and the products have good dispersibility, fluidity and disintegration. The temperature of the hot air is high, but because the hot air enters the drying chamber immediately, it contacts with the spray droplet, the indoor temperature drops rapidly, and the wet bulb temperature of the material is basically unchanged, so it is also suitable for drying the heat sensitive material.
The production process is simplified and the operation control is convenient. Spray drying is usually used for the solution with a solid content of less than 60%. After drying, it does not need to be smashed and screened. It reduces the production process and simplifies the production process. For the product particle size, bulk density, moisture, within a certain range, can change the operating conditions to adjust, control, management is very convenient.
6. In order to protect the materials from contamination and prolong the service life of the equipment, all parts in contact with the materials are made of stainless steel. After spraying, the material is atomized into dispersed particles, and the surface area is greatly increased. After drying with hot air, the drying process can be completed in a very short time. In general, 95% - 98% of water can be evaporated within 1-3 s at 100-150 ℃. Because the drying process is completed in an instant, the particles of the finished product can basically keep the spherical shape similar to the liquid drop, so it has good dispersion, excellent impact property and high solubility.
Possible problems in production, causes and remedial measures:
1. Serious wall sticking phenomenon: there are sticky wet powder everywhere in the drying room.
The reasons are: (1) the feed volume is too large to fully evaporate; (2) the drying chamber is not heated enough before the start of the spray; (3) when the spray is started, the cutting flow rate is too large; (4) the liquid material added is unstable.
In view of the different causes of the above problems, the following measures can be taken in order to reduce the feed volume appropriately, appropriately increase the inlet and outlet temperature of the hot air, increase the flow rate at the beginning of the spray and gradually increase it to the appropriate time; check whether the pipeline is clogged, adjust the solid content of the material, and ensure the fluidity of the liquid.
2. The moisture content of the product is too high
Exhaust air temperature is the main factor affecting the moisture content of finished products, so the reason why the moisture content of products is too high is that the exhaust air temperature is too low. The exhaust temperature can be adjusted by the feed rate. Therefore, the corresponding measures are to reduce the feed rate appropriately to improve the exhaust temperature.
3. The purity of the product is low and there are too many impurities
The possible reasons for this situation are as follows: (1) the air filtration effect is not good; (2) the accumulated powder is mixed into the finished product; (3) the purity of raw materials is not high; (4) the equipment is not cleaned thoroughly. The remedial measures that can be adopted are: check whether the filter material in the air filter is evenly laid, whether the filter has been used for too long, and if it should be replaced immediately; check the coke powder at the hot air inlet to overcome the eddy current; filter the material liquid before spraying; and clean the equipment again.
4. The product powder is too fine. The reason is that the solid content is too low or the feed content is too small. The remedial measures are to increase the solid content of the feed liquid, increase the feed volume and increase the inlet air temperature.
5.The excessive loss of powder loss greatly affects the yield of finished products. The general reason is the poor separation effect of cyclone separator. If this happens, check whether the cyclone separator is deformed due to knocking and collision; improve the air tightness of the inlet and outlet of the cyclone separator; check whether the inner wall and outlet of the cyclone separator are blocked by accumulated materials. Of course, the separation efficiency is also related to the specific gravity and particle size of the powder.
6. The rotating speed of centrifugal nozzle is too low
The main reason is that the parts of the centrifugal nozzle are out of order, so stop using the nozzle and check the internal parts of the nozzle.
Evaporation is too low
The reasons may be as follows: (1) the air volume of the whole system is reduced; (2) the inlet temperature of hot air is low; (3) the equipment has air leakage, and cold air enters the drying chamber. The remedial measures are as follows: (1) check whether the speed of the centrifuge is normal; (2) check whether the position of the regulating valve of the centrifuge is correct; (3) check whether the pipes of the air filter and air heater are blocked; (4) check whether the grid voltage is normal; (5) check whether the electric heater works normally; (6) check whether the connection of the components of the equipment is sealed.
8. There is noise or vibration when the centrifugal nozzle is running
Mainly due to improper cleaning and maintenance of the nozzle, residual substances in the spray tray or bending and deformation of the main shaft may also be caused by poor dynamic balance of the centrifugal disk. Solution; check whether there is any residual substance in the spray tray, if necessary, clean it in time; find abnormal spindle; replace it; re adjust or replace the dynamic balance of the centrifugal disc.
