Formaldehyde waste gas treatment system

Abstract

The invention discloses a formaldehyde waste gas treatment system. The formaldehyde produced during the chemical reaction of rubber making in a reaction kettle is connected to a fan through a pipeline, and the outlet of the fan is connected to a secondary fan through a pipeline. The air outlet of the secondary fan is It is connected with the pipeline leading to the boiler, and the pipeline protruding into the furnace is welded with sub-pipes. The number of the sub-pipes is at least six, and the sub-pipes are inserted into the furnace at a certain angle. The angle to which each sub-pipe is arranged is based on the cyclone that can be formed when inserted into the furnace. When preparing urea-formaldehyde resin adhesive, formaldehyde and urea are mixed in a certain molar ratio in a reactor, and react in the reactor to form a urea-formaldehyde resin. In this technical solution, after the rubber-making chemical reaction is carried out in the reactor, the formaldehyde waste gas produced is led to the boiler through the pipeline, and is fully burned in the furnace to generate water and carbon dioxide, thereby improving the combustion efficiency and fully utilizing the waste gas.

Description

technical field [0001] The invention relates to a waste gas treatment system when formaldehyde resin is used to add glue when preparing medium density fiberboard. Background technique [0002] During the preparation of MDF, adhesives need to be added. The urea-formaldehyde resin adhesive is a thermosetting polymer adhesive developed earlier. Because of its simple process, cheap raw materials, and high bonding strength, it is the most commonly used fiberboard adhesive. [0003] When preparing urea-formaldehyde resin adhesive, formaldehyde and urea are mixed in a certain molar ratio to react to form urea-formaldehyde resin. During this process, a large amount of toxic waste gas of formaldehyde with a pungent smell will be produced, which will cause physical damage to the staff in the preparation workshop. In the original system, formaldehyde waste gas needs to go through a series of treatment methods such as condenser, cyclone separator, and plasma waste gas treatment device...

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Problems solved by technology

[0004] The patent number authorized by the State Patent Office is 201520254144X, which discloses a wood-based panel rubber-making tail gas treatment system, which is characterized in that it includes a condenser, a tail gas treatment device and a centrifugal fan, wherein the inlet of the condenser and the tail gas outlet of the rubber-making reaction kettle Connected by pipelines, the outlet of the condenser is divided into two channels, one is the condensed residual exhaust gas channel, the condensed residual exhaust gas channel is connected to the inlet of the exhaust gas treatment device, the other is the condensed water channel, and the condensed water channel is connected to the system through the pipeline. There is a one-way valve on the condensate channel, the outlet of the exhaust gas treatment device is connected to the exhaust port of the centrifugal fan through the pipeline, and the exhaust port of the centrifugal fan is discharged through the chimney. The exhaust gas treatment device is equipped with activated carbon The pipe filter or the container with activated carbon, the disadvantage is that the tail gas of rubber making is discharged through the chimney after treatment, and the exhaust gas cannot be used, which is a waste of resources

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