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MDF tail gas up-to-standard emission process

The technology of tail gas and process is applied in the field of tail gas treatment of wood-based panel manufacturing, which can solve the problems of uncontrolled tail gas components, high formaldehyde content and high dust content, and achieves harmless emission, simple process method, and reduced processing energy consumption. Effect

Pending Publication Date: 2021-12-03
佳诺威集团(河南)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high dust content, high temperature and high formaldehyde content in MDF tail gas emission without controlling the tail gas components in the prior art, and propose a MDF tail gas discharge process up to standard

Method used

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  • MDF tail gas up-to-standard emission process

Examples

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Comparison scheme
Effect test

Embodiment 1

[0021] A kind of MDF tail gas up-to-standard discharge process that the present invention proposes comprises the following steps:

[0022] S1. Control the air intake speed to 1.8L / s, pass the MDF tail gas discharged from the production into the spray tower, and control the amount of spray water to 0.5m 3 / h, the temperature of the spray water is 2°C, and the spray water is used for spray treatment to obtain the spray liquid, which is passed into the condensation pipe and cooled to normal temperature;

[0023] S2. Add the cooled spray liquid in step S1 to the reactor, adjust the pH value to neutral, control the mass ratio of the spray liquid to the activated carbon-supported catalyst to be 1:0.02, add the activated carbon-supported catalyst, and heat up to 50°C , after stirring and reacting for 3h, leave it to stand and centrifuge to obtain the treatment solution and sediment, and the treatment solution is reused in step S1 to replace the spray water. The activated carbon-loade...

Embodiment 2

[0026] A kind of MDF tail gas up-to-standard discharge process that the present invention proposes comprises the following steps:

[0027] S1. Control the air intake speed to 2L / s, pass the MDF tail gas discharged from the production into the spray tower, and control the amount of spray water to 0.8m 3 / h, the temperature of the spray water is 5°C, and the spray water is used for spray treatment to obtain the spray liquid, which is passed into the condensation pipe and cooled to normal temperature;

[0028] S2. Add the cooled spray liquid in step S1 to the reactor, adjust the pH value to neutral, control the mass ratio of the spray liquid to the activated carbon-supported catalyst to be 1:0.03, add the activated carbon-supported catalyst, and raise the temperature to 55°C , after stirring and reacting for 3.5h, leave it to stand and centrifuge to obtain the treatment solution and sediment, and the treatment solution is reused in step S1 to replace the spray water. The activate...

Embodiment 3

[0031] A kind of MDF tail gas up-to-standard discharge process that the present invention proposes comprises the following steps:

[0032] S1. Control the air intake speed to 2.2L / s, pass the MDF tail gas discharged from the production into the spray tower, and control the amount of spray water to 1m 3 / h, the temperature of the spray water is 8°C, and the spray water is used for spray treatment to obtain the spray liquid, which is passed into the condensation pipe and cooled to normal temperature;

[0033] S2. Add the cooled spray liquid in step S1 to the reactor, adjust the pH value to neutral, control the mass ratio of the spray liquid to the activated carbon-supported catalyst to be 1:0.04, add the activated carbon-supported catalyst, and heat up to 60°C , after stirring and reacting for 4h, leave it to stand and centrifuge to obtain the treatment solution and sediment, and the treatment solution is reused in step S1 to replace the spray water. The activated carbon-loaded ...

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Abstract

The invention belongs to the technical field of artificial board manufacturing tail gas treatment, particularly relates to an MDF tail gas up-to-standard emission process, and solves the problems of high dust content, high temperature, high formaldehyde content and the like due to the fact that tail gas components are not controlled during MDF tail gas emission in the prior art. The process comprises the following steps: spraying and condensing MDF tail gas discharged from production to obtain spraying liquid; adding an activated carbon supported catalyst into the spray liquid for catalytic reaction, and performing centrifugal separation to obtain a treatment liquid and a precipitate; and roasting the precipitate to regenerate and recover the activated carbon. According to the invention, low-temperature water spraying and condensation treatment are adopted, so that the MDF tail gas discharged during production is changed into room-temperature spraying liquid, the catalytic treatment of subsequent procedures is facilitated, the catalytic efficiency of a catalyst is improved, the service life of the catalyst is prolonged, and the treatment energy consumption of the MDF tail gas is reduced.

Description

technical field [0001] The invention relates to the technical field of tail gas treatment of wood-based panel manufacturing, in particular to an MDF tail gas up-to-standard discharge process. Background technique [0002] Medium density fiberboard (medium density fiberboard, MDF) is made of wood fiber or other plant fiber as raw material, applied with urea-formaldehyde resin or other synthetic resin, and pressed under heat and pressure to a density of 0.50-0.88g / cm 3 range of plates, other suitable additives can also be added to improve the properties of the plates. MDF has good physical and mechanical properties and processing properties, and can be made into plates of different thicknesses, so it is widely used in furniture manufacturing, construction, and interior decoration. Medium-density fiberboard is a homogeneous porous material with good acoustic performance. It is a good material for making speakers, TV casings, and musical instruments. In addition, it can replac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01J31/06B01J38/02B01J38/04C02F9/04C02F1/00C02F103/18
CPCB01D53/14C02F9/00C02F1/00B01J31/06B01J38/02B01J38/04C02F2001/007C02F2103/18C02F1/66C02F1/38B01D2258/02
Inventor 祁振生陈勇余文彬
Owner 佳诺威集团(河南)新材料有限公司
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