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Dying control method of biomass materials

A drying control and biomass technology, which is applied in the field of biomass material drying control, can solve the problems of high energy consumption and low drying efficiency, so as to improve drying efficiency, increase humidity stability, avoid less drying and overbaked effect

Inactive Publication Date: 2011-01-26
GUANGZHOU DEVOTION THERMAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a drying control method that is suitable for drying biomass materials and precisely controls the drying degree of materials, so as to solve the problems of low drying efficiency and high energy consumption

Method used

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Experimental program
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Embodiment 1

[0029] see figure 1, the biomass drying control method of this embodiment is applied in a drum-type biomass drying system, which belongs to an open drying method. The drum-type biomass drying system includes a feeding device, a heating device, a drying Drying device and control device, feeding device, heating device are connected with drying device respectively, and control device comprises control unit (not shown in the figure) and the humidity sensor 101 that is connected with this control unit, and control unit is connected with feeding device, supplying device respectively. Heating device, drying device connection. The control unit is a single-chip microcomputer including a programmable controller, and other computer systems that can realize industrial control can also be selected; the feeding device is a belt-type feeding mechanism 201, and the control unit controls the speed of the belt to ensure that it enters the oven. The biomass in the drying device meets the requir...

Embodiment 2

[0032] In the biomass drying control method of this embodiment, the applied biomass drying system is divided into three areas in the drum 401 along the axial direction, which are the first area, the second area and the third area. Humidity sensors 101 are also respectively provided in the three areas. Preferably, the humidity sensors 101 are evenly distributed along the circumferential direction of the drum 401 so that the humidity data of the biomass can be collected more accurately. Other structures and embodiments of the biomass drying system One's the same. When the biomass to be dried passes through the first area, the humidity sensor 101 in this area measures the humidity of the biomass to be dried. If there is no instruction, if the humidity of the biomass to be dried is too low, the control unit will issue an instruction to increase the inclination angle of the drum 401 or / and the speed of the drum to increase the speed of the biomass traveling in the drum and shorten ...

Embodiment 3

[0034] In the biomass drying control method of this embodiment, the control device of the biomass drying system applied further includes a temperature sensor 102 connected to the control unit, and the temperature sensors 102 are respectively arranged at the hot air inlet of the drum 401 404 and the hot air outlet 406, other structures of the biomass drying system are the same as those of the second embodiment. According to the temperature sent back by the temperature sensor, the control unit can control the amount of fuel in the hot blast stove according to the specific situation, increase or decrease the temperature in the drum, and achieve more precise drying control.

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Abstract

The invention discloses a drying control method of biomass materials, which comprises the following steps: (1) conveying the biomass to be dried to a drying device by using a conveying device; (2) measuring the humidity of the biomass to be dried and / or the humidity of the biomass at the entrance of the drying device; (3) heating the biomass in the drying device by using the drying device, wherein a control unit sets the feeding speed and / or heating speed initially according to the humidity measured in the step (2); and (4) measuring the humidity of the biomass at the exit of the drying device, wherein the control unit dynamically regulates the feeding speed and / or heating speed according to the measured humidity, wherein the heating process also comprises a step of regulating the heated position of the biomass. In the method, the feeding speed and / or heating speed are dynamically regulated according to the humidity of the biomass; and thus, the dryness of the dried material in the dryer can be controlled accurately, the humidity stability of the dried material is increased, under-drying and over-drying phenomena are eliminated and the drying efficiency is improved.

Description

technical field [0001] The invention relates to a technology for drying biomass materials, and more specifically, the invention relates to a drying control method for biomass materials. Background technique [0002] Drying equipment is widely used in various industries, such as building materials, metallurgy, chemical industry, cement industry and other industries, for drying and pretreatment of slag limestone, coal powder, slag, clay, wood chips and other substances, after reaching a certain degree of drying for further processing. [0003] At present, biomass drying methods are mainly divided into two categories: one is an open drying method, and the other is a closed drying method. The open drying method is to heat the air through the heat source, and then use the wind device to force the hot air to flow through the biomass to be dried, and then discharge the hot air to the outside atmosphere, thereby taking away the biomass to be dried. moisture, so that the moisture i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B25/22
Inventor 常厚春李祖芹马革张衍胜
Owner GUANGZHOU DEVOTION THERMAL TECH
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