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System for drying material containing volatile gas and drying method of system

A material and dryer technology, applied in the direction of drying solid materials, non-progressive dryers, drying, etc., can solve the problems of exhaust gas discharge, low heat energy utilization rate, secondary pollution, etc., and achieve low energy consumption and simple structure Effect

Inactive Publication Date: 2018-08-03
NANJING GAOYUAN ENVIRONMENTAL PROTECTION ENG
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  • Abstract
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  • Application Information

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Problems solved by technology

[0002] A common drying method for materials containing volatile gases is the hot air drying process, which has a low utilization rate of heat energy, and dust pollution and exhaust gas will be generated during the drying process, which is prone to secondary pollution

Method used

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  • System for drying material containing volatile gas and drying method of system

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Embodiment 1

[0030] The waste produced by a chemical factory is mainly composed of ammonium phosphate with a moisture content of about 50%, which also contains SO3, dilute ammonia water, etc. When drying, the material cleaned by the cleaning section is sent to the material stirring preheater, and the stirring shaft drives the stirring blade Stir the material and preheat at the same time. The heat source for preheating comes from the steam at the outlet of the heat source of the hollow paddle dryer; The shell of the dryer and the back cavity of the paddle maintain a uniform temperature through the steam; the heat is transferred to the material through the paddle and the shell, and the material achieves the purpose of drying through heating, propulsion and stirring of the paddle ; The waste gas generated during the drying process enters the waste gas treatment tower from the gas outlet on the upper part of the preheater shell for treatment, and the tail gas is absorbed by spraying and then di...

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Abstract

The invention discloses a method for drying material containing volatile gas. The method comprises the following steps: material cleaned by a cleaning section is fed into a material stirring preheater; a stirring shaft drives stirring blades to stir the material; at the same time, steam from the heat source outlet of a hollow blade drying machine enters the housing of the preheater, the stirring shaft and the cavities of the stirring blades to preheat the material; the preheated material enters the hollow blade drying machine via a material inlet; the steam enters the drying machine housing and the cavities of the blades from a heat source inlet; the material is dried through heat transferred by the drying machine housing and the blades and propulsion and stirring of the blades; waste gasgenerated during the drying process enters a waste gas treatment tower to be treated from a gas outlet in the upper part of the preheater housing; and the tail gas is subjected to spraying absorptionand is discharged out from a tail gas outlet. With adoption of the method, dust pollution and emission of harmful substances in waste gas are lowered.

Description

technical field [0001] The invention relates to a material drying method, in particular to a material drying system containing volatile gas and a drying method thereof. Background technique [0002] A common drying method for materials containing volatile gases is the hot air drying process, which has a low utilization rate of heat energy, and dust pollution and exhaust gas will be generated during the drying process, which is prone to secondary pollution. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a material drying system containing volatile gas to reduce dust pollution and discharge of harmful substances in waste gas. [0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a material drying system containing volatile gas, including a material stirring preheater, a hollow paddle dryer, an exhaust gas absorption tower and an atomizing nozzle; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B11/14F26B17/20F26B23/00F26B23/10F26B25/00F26B25/04
CPCF26B11/14F26B17/20F26B23/001F26B23/10F26B25/005F26B25/04
Inventor 沈国栋
Owner NANJING GAOYUAN ENVIRONMENTAL PROTECTION ENG