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Heat-sensitive material closed loop adsorption dehumidification two-stage drying system

A heat-sensitive material, closed-circuit circulation technology, applied in the direction of heating to dry solid materials, drying solid materials, fluid circulation arrangement, etc., can solve the problems of pollution, limited dust removal ability, etc., to shorten the reaction time, shorten the drying time, and ensure the activity Effect

Active Publication Date: 2020-10-16
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dust removal capacity of the gas-solid separator or the bag filter is limited, and the exhaust gas after dust removal will inevitably carry a certain amount of dust, which will be discharged into the atmosphere to cause pollution

Method used

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  • Heat-sensitive material closed loop adsorption dehumidification two-stage drying system
  • Heat-sensitive material closed loop adsorption dehumidification two-stage drying system

Examples

Experimental program
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Effect test

Embodiment 1

[0059] This embodiment 1 utilizes such as figure 1 The device system with the structure shown dries the LM resin with a water content of 44%, which is divided into the first drying stage and the second drying stage, and the drying medium is N 2 .

[0060] Such as figure 1 As shown, the device of the present invention includes a closed loop system, a wheel dehumidification system, a heat pump cycle system, and a drying system.

[0061] The air path of the drying process in the first drying stage is: LM resin with a water content of 44% is passed into the first drying zone I, and at the same time, the temperature is 50°C and the humidity is 2.0 from the air inlet at the bottom of the first drying zone I. g / kg dry N 2 , for drying. After the tail gas discharged from the top of the first drying zone I passes through the first gas-solid separator 2 to remove solids, the temperature discharged from the first gas-solid separator 2 is 60°C, humidity 48.9g / kg absolute dry N 2 , an...

Embodiment 2

[0070] This embodiment 2 utilizes such as figure 2 The device system with the shown structure dries the LM resin with a water content of 44%, which is divided into the first drying stage and the second drying stage, and the drying medium is nitrogen.

[0071] The air path of the drying process in the first drying stage is: LM resin with a water content of 44% is passed into the first drying zone I, and the temperature is 50°C and the humidity is 2.0g from the air inlet at the bottom of the first drying zone I. / kg dry N 2 , for drying. Cool down through the first precooler 3 to obtain a temperature of 47°C and a humidity of 48.9g / kg absolute dry N 2 , and the N extracted from the first regenerative blower 14 with a temperature of 60°C and a humidity of 27.2g / kg 2 , mixed to obtain N with a temperature of 50.2°C and a humidity of 43.5g / kg 2 Through the first evaporator 4 and the second evaporator 5, the absolute dry N with a temperature of 12°C and a humidity of 8.3g / kg is...

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Abstract

The invention discloses a heat-sensitive material closed loop adsorption dehumidification two-stage drying system. The heat-sensitive material closed loop adsorption dehumidification two-stage dryingsystem comprises a dryer, the dryer comprises a first drying zone and a second drying zone, one top air outlet of the first drying zone communicates with a first gas-solid separator, one air outlet ofthe first gas-solid separator is connected with one air inlet of a second evaporator by one pipeline through a first precooler and a first evaporator in sequence, one air outlet of the second evaporator is divided into two paths, and one path is connected with one bottom air inlet of the first drying zone by one pipeline through an adsorption dehumidification zone of a first-stage dehumidification rotating wheel, a first condenser for preheating, a first cycle air fan and a first heater to form a first-stage drying gas circulation loop. By means of the heat-sensitive material closed loop adsorption dehumidification two-stage drying system, a two-path closed loop system is adopted, when heat-sensitive materials are dried, the activity of the heat-sensitive materials is maintained, and a good drying effect is also achieved.

Description

technical field [0001] The invention relates to a heat-sensitive material closed loop adsorption dehumidification secondary drying system. Background technique [0002] Heat-sensitive materials are materials that are unstable when exposed to heat. During the drying process of such materials, they are very sensitive to drying temperature and drying time. Since heat-sensitive materials are prone to deterioration reactions such as decomposition, polymerization, and oxidation when exposed to heat, if the drying temperature of heat-sensitive materials is high and the drying time is too long, their components will be severely damaged, which will cause major economic losses. Production should try to avoid the occurrence of this phenomenon. In the drying process of heat-sensitive materials, drying temperature and drying time are very important control factors. In the prior art, methods for drying heat-sensitive materials generally include spray drying, vacuum freeze drying, hot ai...

Claims

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Application Information

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IPC IPC(8): F26B3/06F26B21/00F26B21/04F26B21/08F26B21/10F26B25/00F25B30/06F25B41/06
CPCF26B3/06F26B21/002F26B21/04F26B21/086F26B21/10F26B25/002F26B25/005F25B30/06
Inventor 程榕董晨晨杨阿三郑燕萍孙勤李琰君贾继宁屠美玲
Owner ZHEJIANG UNIV OF TECH
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