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Urea granule dense-phase conveying method and system

A technology of dense phase conveying and urea granules, applied in conveyors, conveying bulk materials, transportation and packaging, etc., can solve problems such as urea granule crushing

Active Publication Date: 2017-08-18
SHANGHAI BOLONG EQUIP TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]Because urea granules are brittle, it is easy to break urea granules by using dilute phase airflow (usually the delivery speed is greater than 20 meters per second)

Method used

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  • Urea granule dense-phase conveying method and system
  • Urea granule dense-phase conveying method and system

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Embodiment Construction

[0024] see figure 1 , figure 2 , a urea particle dense phase delivery system of the present invention, which comprises,

[0025] Dense-phase conveying air source control unit 1, including pressure reducing valve 11, three sets of laval tubes 12-14 and corresponding pneumatic butterfly valves F1-F3 arranged in sequence; wherein, pressure reducing valve 11 is set in the system air source pipeline 100 ;Three sets of laval tubes 12-14 and corresponding pneumatic butterfly valves F1-F3 connected in parallel are arranged in the outlet pipeline of the pressure reducing valve 11;

[0026] The rotary feeding valve unit 2 is arranged in the outlet pipeline 201 of the hopper 200, which includes a rotary feeding valve 21, a leakage gas filter 22, and a pressure sensor 23; wherein, the hopper outlet pipeline 201 is connected to the dense phase In the pipeline at the outlet end of the three groups of laval tubes in the delivery gas source control unit 1, the rotary feeding valve 21 and t...

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Abstract

The invention relates to a urea granule dense-phase conveying method and system. The urea granule dense-phase conveying system comprises a dense-phase conveying air source control unit, a rotating discharge valve unit, a dense-phase elutriator and a tail gas treatment unit. The granule dense-phase conveying method comprises the following steps: urea granular materials are fed by a urea granule hopper into a dense-phase conveying pipeline through a rotating discharge valve, a plug and delivery air in the dense-phase conveying pipeline tangentially enter a feed cylinder of the dense-phase elutriator to form continuous materials and air at the upper part of the feed cylinder, the material flow is accelerated through an accelerating tube, the granular material discharged from the accelerating tube is separated from the air flow due to inertia, the separation of the granular material from the powdered material is realized, the granular material enters a collecting hopper and is fed into a downstream storage bin through a gravity rotary valve; the powdered material enters an exhaust gas pipeline to be entrained from the hopper along the reverse direction of air flow; powdered material-entrained delivery tail gas enters a bag filter, the powdered material is captured, and the gas is discharged after being filtered. According to the urea granule dense-phase conveying method and system, the concept of the dense-phase elutriator is put forward for the first time, after the plug in the pipeline passes through the system, continuous separation of the uric acid powered material from granular material under the dense-phase condition can be realized.

Description

technical field [0001] The invention relates to material conveying technology, in particular to a method and system for dense phase conveying of urea particles. Background technique [0002] In view of the advantages of flexible pipeline layout, more environmental protection, convenient maintenance, and simple control system, some urea manufacturers and urea users began to hope to use air flow for material transportation. [0003] Since the urea particles are brittle, the use of dilute-phase gas flow (usually at a delivery speed greater than 20 meters per second) may easily cause the urea particles to break. [0004] The urea granules themselves contain some powder, and some dust will inevitably be generated during the conveying process. It is hoped that the method of dense-phase airflow conveying (conveying speed less than 10 meters per second) can be used to reduce particle breakage and achieve the purpose of urea granules entering The separation of pellets and powder is ...

Claims

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Application Information

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IPC IPC(8): B65G53/36B65G53/46B65G53/04B65G53/34
CPCB65G53/04B65G53/34B65G53/36B65G53/46
Inventor 杨腾
Owner SHANGHAI BOLONG EQUIP TECH CO LTD
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