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Spray drying process for mancozeb

A technology of mancozeb and a new process, which is applied in animal repellents, botanical equipment and methods, and biocides, and can solve problems such as uneven heating of wet powder, long drying time, and box wall adhesion. Achieve the effects of eliminating sticking and fire phenomena, reducing floor space and reducing energy consumption

Inactive Publication Date: 2005-01-26
许惠朝
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a new drying method to solve the drying problem of wet powder, so as to completely solve a series of problems such as long drying time, uneven heating of wet powder, decomposition loss caused, box wall adhesion and intermittent production, etc. Defects in the current process

Method used

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Embodiment Construction

[0010] The specific process improvement scheme adopted in this invention is embodied in the drying process after mancozeb is synthesized and dehydrated to form wet powder.

[0011] The process steps taken in this process include:

[0012] 1. Add water to the wet powder and beat to form a slurry with a concentration of 10-50%.

[0013] 2. Grinding the slurry to make the particle size of the material less than 2.5 μm,

[0014] 3. The ground slurry is sprayed into the air drying tower through the atomizing nozzle by high-pressure airflow, and at the same time, the high-temperature airflow is introduced to vaporize the water and finally form a mixture of material and steam (gas).

[0015] 4. Introduce the vapor (gas) material mixture into the cyclone separator for gas-solid separation, mancozeb material settles,

[0016] 5. The airflow with residual fine materials is introduced into the falling film dust collector for further recovery and returned to the beating process for reus...

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Abstract

A novel spray drying process for wet powder of mancozab features that a spray drying method is used to replace original vacuum drying method, the additional beating and grinding steps for wet powder are used for fining the particles, and airflow drying tower and two-stage cyclone separator are used for drying and recovery purposes. Its advantages are high automatic level, continuous production, less floor area, easy control of quality and low cost.

Description

technical field [0001] The invention belongs to the production process of high-efficiency and low-toxicity pesticides, in particular to the improvement of the production process of mancozeb. Background technique [0002] Mancozeb series products represented by mancozeb are currently one of the excellent fungicides at home and abroad. It has the advantages of high efficiency, broad spectrum, low toxicity, and slow development of resistance. It is very suitable for the requirements of modern agriculture for green environmental protection, so it is welcomed by farmers at home and abroad. In the production process of Daisen products, the process of synthesis and dehydration of raw powder to form wet powder has been relatively mature. But also there is 30-40% moisture content in the wet powder that forms after completing dehydration. Due to the physical and chemical properties of mancozeb, if the water in the wet powder is not removed in time, it will b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N47/24
Inventor 许惠朝
Owner 许惠朝
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