Drying flow granulation technology and device for paraquat water soluble granule spray

A flow granulation and drying technology, applied in the field of pesticides, can solve the problems of only intermittent granulation, non-continuous production, operator injury, etc., and achieve the effect of realizing automatic and continuous production, improving production efficiency and reducing pollution

Active Publication Date: 2014-05-28
NANJING GAOZHENG AGROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The technical problem to be solved by the present invention is that, in view of the low production efficiency, low yield rate, weak strength of the obtained particles, serious dust leakage, easy to cause injury to operators, and production problems in the paraquat water-soluble granule preparation process in the prior art The above-mentioned defects such as low safety, and the defects such as the granulation equipment adopted in the prior art can only

Method used

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  • Drying flow granulation technology and device for paraquat water soluble granule spray

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Experimental program
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Effect test

Embodiment 1

[0069] A paraquat water-soluble granule spray drying flow granulation process, comprising the steps of:

[0070] (1) Raw material preparation: After the main raw materials and auxiliary agents of the preparation are pumped into the material tank 16 through the diaphragm pump 18, they are mixed evenly and then prepared into a liquid mixture;

[0071] (2) Spray drying and granulation: the liquid mixture is transported to the pressurized two-fluid nozzle 3, and then atomized into fine droplets in the drying tower 1 under the action of compressed air; the fine droplets and hot air in the drying tower 1. After the internal contact, the water evaporates instantly to become a semi-dry powder, and at the same time, the semi-dry powder is granulated to obtain semi-dry granules;

[0072] (3) One-time dedusting and returning to the tower for continuous granulation: while the fine droplets are dried into semi-dry powder, the hot air with fine powder discharged from the drying tower 1 is t...

Embodiment 2

[0093]This embodiment is basically the same as Embodiment 1, the difference is:

[0094] Such as figure 1 As shown, a first pressure gauge 28 is provided between the first air blower 5 and the first heater 6 to detect the air volume drawn by the first air blower 5, so that the air volume entering the pressurized two-fluid nozzle 3 can be accurately controlled; A second pressure gauge 29 is provided between the fifth air blower 24 and the sixth heater 25 to precisely control the air volume delivered by the fifth air blower 24 .

[0095] In this embodiment, an automatic equipment cleaning structure can also be set, that is, in the drying tower 1, the built-in fluidized bed 2, the vibrating fluidized bed 15, the first cyclone separator 19, the second cyclone separator 20, the first dust collector 21. The second deduster 23 and each pipeline are equipped with fully automatic retractable nozzles, and all the fully automatic retractable nozzles are connected to the water tank 17, s...

Embodiment 3

[0097] This embodiment is basically the same as Embodiment 1, the difference is:

[0098] The seventh heater 30 is set between the second heater 9 and the hot air distributor to ensure the heating effect of the cold wind; A high-efficiency filter is set, and a second primary filter can also be set before the third air blower 10 to filter out impurities in the cold wind.

[0099] In this embodiment, a heat insulating layer is laid on the inner wall of the drying tower 1 to reduce or ease the agglomeration around the pressurized two-fluid nozzle 3 .

[0100]

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Abstract

The invention discloses a drying flow granulation technology and a device for a paraquat water soluble granule spray. The technology comprises the following steps: raw materials preparation; spray drying granulating; primary dust removing and tower returning for continuous granulation; tower bottom granulating; fluidized bed granulating and drying outside the tower; secondary dust removing and tower returning for continuous granulation; and dust removing for a third time. The device comprises a feeding mechanism, an atomizing mechanism, an air intake mechanism, a drying granulation mechanism, a vibration fluidization dry cooling mechanism, and an exhausting mechanism. According to the technology for the paraquat water soluble granule spray provided by the invention, the granulation yield is improved; the granulation intensity is enhanced; moreover, sealed production is achieved; the dust leakage is avoided; the production security is greatly improved; according to the device, the full automatic, dust-free, clean and continuous production of the paraquat water soluble granule is achieved; moreover, the environmental pollution is reduced; the intoxication of people caused by direct inhaling is prevented; the production security is improved.

Description

[0001] technical field [0002] The invention relates to the technical field of pesticides, in particular to a paraquat water-soluble granule spray drying flow granulation process and device. [0003] Background technique [0004] Paraquat, a bipyridinium salt rapid herbicide, has a contact effect and a certain systemic effect, and can kill most grasses and broad-leaved weeds. The green leaves will start to die after contacting the liquid for a few hours. If it rains in the next hour, the efficacy of the medicine will not be affected. The medicinal liquid has no adverse effects on mature or brown bark and vines. Rapid passivation after contact with soil without affecting the roots of crops. It can control various annual weeds, and is mainly suitable for controlling weeds in orchards, mulberry gardens, rubber gardens, corn, sugarcane, soybeans and nursery crops. Because of this advantage, this pesticide is currently widely used in the country. Due to its excellent her...

Claims

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Application Information

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IPC IPC(8): B01J2/04B01J2/16A01N43/40A01N25/14A01P13/00
Inventor 汪茂勤汪莘杰
Owner NANJING GAOZHENG AGROCHEM
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