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Man-made board dry waste heat recycle method

A wood-based panel drying and waste heat recovery technology, which is applied in combustion methods, indirect heat exchangers, lighting and heating equipment, etc., can solve the problems of difficulty in recycling and achieve the effect of high difficulty in recovery and large amount of waste heat resources

Inactive Publication Date: 2013-02-13
NANJING FORESTRY UNIV
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  • Claims
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Problems solved by technology

Recycling is difficult

Method used

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  • Man-made board dry waste heat recycle method
  • Man-made board dry waste heat recycle method

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Embodiment Construction

[0024] control figure 1 , a method for recovering waste heat from wood-based panel drying tail gas, comprising the following process steps:

[0025] 1. Driven by the hot end fan 2, the dry tail gas discharged from the cyclone separator 5 first flows through the tail gas filter 4 to filter the dust in the tail gas;

[0026] 2. The evaporation section flowing through the heat pipe heat exchanger 1 is directly emptied after the heat exchange temperature is lowered;

[0027] 3. Driven by the cold end fan 3, the temperature of the cold air rises after absorbing heat through the condensation section of the heat pipe heat exchanger 1;

[0028] 4. After being heated by the hot oil heat exchanger 6, it can be used as a material drying medium, or directly sent to the boiler as preheated air without going through the hot oil heat exchanger.

[0029] When the heat pipe heat exchanger is working,

[0030] 1) Driven by the hot end fan 2, the hot and cold air respectively flows through th...

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Abstract

The invention relates to a man-made board dry waste heat recycle method which includes the following steps: step one, dry tail gas discharged from a cyclone separator is driven by a hot end fan and flows through a tail gas filter, and therefore dust in the tail gas can be filtered; step two, an evaporation section flowing through a heat pipe exchanger is directly emptied when temperature of the evaporation section is reduced after heat exchange; step three, temperature of cold air driven by a cool end fan is raised after a condensation section of the heat pipe exchanger absorbs heat; and step four, the cold air is used as a material drying medium after being heated by a hot oil exchanger or as preheat air to be delivered to a boiler without entering into the hot oil exchanger. The man-made board dry waste heat recycle method has the advantages that a high-efficiency heat exchanger is used to recover waste heat in man-made board dry tail gas, in the process of heat exchange, heat exchange components are in a phase-change heat exchange state, heat exchange intensity is large, and therefore a great deal of low-temperature waste heat can be effectively recovered. A high-efficiency dust remover is arranged in front of the heat exchanger, and therefore the problems that the heat exchanger is prone to dust stratification and blockage and the like are solved.

Description

technical field [0001] The invention relates to a method for recovering and utilizing waste heat from wood-based panel drying, which belongs to the technical field of wood-based panel manufacturing. Background technique [0002] With the increasing shortage of energy, the cost of thermal energy utilization will account for an increasing proportion in the production cost of wood-based panels. In the industrial production of wood-based panels, the utilization of heat energy is mainly concentrated in the links of cooking, hot grinding, drying, and hot pressing, and the final export of heat energy in these links is concentrated in the drying tail gas. If you want to further reduce energy consumption in production, To achieve energy saving and emission reduction, it is a very effective way to recycle the heat energy of the fiber drying tail gas. [0003] Due to the characteristics of low temperature, high humidity, and dust in the drying exhaust gas of wood-based panels, there a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D15/02F23L15/00
CPCY02E20/34
Inventor 孙军徐德良刘翔周捍东
Owner NANJING FORESTRY UNIV
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