Energy and water saving device of 'cold-hot-cold' gluing technique and method thereof

Abstract

The invention belongs to the artificial slab manufacturing field, and mainly solves the problems of saving energy and water in the cold-hot-cold gluing process. An energy and water saving device of the cold-hot-cold gluing process is as follows: a hot-water circulatory tank, a warm-water circulatory tank and a cold-water circulatory pool are arranged at the side of a multilayer thermal press and form three independent circulatory system device of hot-water, warm-water and cold-water through pipelines and valves, respectively. An energy and water saving method of the cold-hot-cold gluing process is as follows: in the first phase, the middle phase and the late phase of the pressure keeping and cooling stage, the hot-water circulatory tank, the warm-water circulatory tank and the cold-water are respectively utilized to cool each hot pressboard of the multilayer thermal press and the blank of each hot pressboard at the temperatures of about 145 DEG C, about 100 DEG C and about 60 DEG C in sequence in the three steps; the temperatures are reduced to about 100 DEG C, about 60 DEG C and about 30 DEG C in sequence; and high temperature water, intermediate temperature water and low temperature water produced in sequence are recycled in three steps, thus achieving the purposes of saving energy and water.

Description

technical field [0001] The invention belongs to the field of wood-based panel manufacturing Background technique [0002] The "cold-hot-cold" gluing process must be used in the production of some special wood-based panels to ensure the quality of gluing. This gluing process consists of three stages: temperature rise and pressure increase, heat preservation and pressure holding, and pressure holding and cooling. In a hot-pressing cycle, when the slab enters each layer of the hot-pressing plate of the multi-layer hot press, the steam of the steam boiler must be used to heat each layer of the multi-layer hot press during the stages of temperature rise and pressure, heat preservation and pressure holding. The pressing plate is heated to increase its temperature from about 30°C to about 145°C and keep it warm for a period of time to make the slabs glued together firmly, and then enter the stage of pressure holding and cooling. In the pressure holding and cooling stage, a large ...

AI Technical Summary

Problems solved by technology

The large amount of cooling water that absorbs the heat of the hot-pressed plate and the slab was discharged directly after one-time use in the past, resulting in a large amount of waste of water and heat energy

On the other hand, the heat energy required by other production processes of wood-based panel enterprises, such as the drying process, is directly supplied by steam boilers, and these steams are also directly discharged through steam traps after one-time use, which also results in the loss of water and heat energy. waste

Images