Aldehyde reduction heat treating process and continuous energy-saving aldehyde reduction heat treating kiln

Abstract

The invention relates to the technical field of aldehyde reduction of plates, and discloses an aldehyde reduction heat treating process which comprises the following steps: putting an artificial plateinto an aldehyde reduction heat treating kiln for heat treating; putting the artificial plate subjected to the heat treating into a health maintenance balance chamber for health maintenance, whereinthe heat treating mode adopts a preheating-heating-constant temperature multistage aldehyde reduction mode, the constant temperature is 110-130 DEG C, the constant temperature time is 1-4 hours, the preheating temperature is 50-80 DEG C, and the preheating time is 0.5-6 hours. The continuous energy-saving formaldehyde-reducing heat treating kiln comprises a preheating kiln section, a formaldehyde-reducing kiln section and a balance kiln section which are connected in sequence, a feeding port is formed in the preheating kiln section, and a discharging port is formed in the balance kiln section;the formaldehyde reduction kiln section is provided with a heat supply assembly, and an airflow conveying assembly is arranged between the balance kiln section and the preheating kiln section and used for conveying airflow of the balance kiln section to the preheating kiln section. By the adoption of the technology, the aldehyde reduction effect can be effectively achieved, meanwhile, the aldehyde reduction treating period is short, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of aldehyde reduction for plates, in particular to a heat treatment process for aldehyde reduction and a continuous energy-saving aldehyde reduction heat treatment kiln. Background technique [0002] The adhesive used in wood-based panels is mainly composed of urea-formaldehyde resin. When the environmental conditions such as temperature and humidity change, urea-formaldehyde resin will continuously release formaldehyde to the surrounding environment, and the release period can reach more than ten years, which is the main cause of formaldehyde pollution in indoor air. Therefore, it is particularly important to reduce the formaldehyde content in the board. [0003] The patent with publication number CN102041890A discloses a method for manufacturing low-formaldehyde emission composite flooring through heat treatment. In this patent, the composite floor is heated in a heat treatment box at a temperature of 60...

AI Technical Summary

Problems solved by technology

In the technical solution of this patent, the plates are discharged from the kiln body after heat treatment and cooling, and the residual air in the kiln body still retains heat, but it is not effectively utilized, resulting in waste

When the next batch of plates needs to be heat treated, the air needs to be heated to a specific temperature and then heat-preserved to achieve the effect of heat treatment. During this process, the difference between the temperature of the air flow in the kiln and the specific temperature is too large, which makes the heating time of the heating components too long. Long processing cycles for panels, resulting in long operating times and high energy consumption

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