Furniture factory 4 environmental protection "dead hole"! See if your home is qualified?

Wood storage, sawn timber processing, machine engraving, scraping (sand) light and other processes produce dust, spray paint, drying and other processes to produce volatile organic compounds, and these landless wood chips, dust, volatile organic compounds without prevention and control measures ...... It was the main cause of the fire-induced fire prevention of furniture companies in the fire department. Now it has become a serious hole in the environmental protection department.

The environmental protection department said that in order to strictly control the air pollution caused by PM2.5, PM10, TSP, etc. in the furniture production and the physical harm to the practitioners, the air pollutant discharge remediation in the furniture manufacturing industry is a key industry for sewage prevention and control. All-round investigation will not let go of any dead corners and details during the investigation.

During the inspection process, the dust pollution source mainly exists in the wood cutting area, the wood processing workshop, the painting and polishing workshop, the white enamel polishing area, and the factory boundary are all dead corners of the environmental protection department.

Among them, specific dust emissions mainly exist in the processes of cutting, drilling, machining, sanding and polishing.

Secondly, the total VOCs emission interval specified in most regional furniture standards is between 80mg/m3 and 40mg/m3, and some regions have adopted stricter concentration limits.

Oil painting coatings are used in the painting process of furniture manufacturing, mainly polyurethane coatings, nitro coatings, alkyds, etc. In general, the topcoat painting workshops of the general enterprise use dust-free closed spray booths to ensure the smoothness of the sprayed parts. Although the paint and color paint process also has an independent spray booth, most of the enterprises are open spray booths due to the lack of strict requirements on the surface finish of the spray parts. Enterprises with relatively good management will remove the paint mist by installing a filter cotton device on the paint booth, while the poorly managed enterprises will directly discharge directly through the exhaust fan installed on the wall of the workshop, which has a very bad impact on the environment.

As the main part of VOCs emission (including drying process), the coating process directly affects the environmental protection department to seal, rectify and stop production due to the influence of the dilution and volatilization of the coating materials on the atmosphere.

In addition, from the remediation plan formulated by Dongyang Environmental Protection Bureau for the pollution problem of mahogany furniture enterprises, it is also possible to understand in detail the current environmental protection problems and rectification requirements of mahogany furniture manufacturers:

1. Wastewater pollution prevention and control

Implement clearing and diversion, and diverting rain and sewage. The production and management of products and sub-regions in the plant area, waste water such as sawdust wastewater, drying and cooking wastewater, bleaching wastewater, mahogany leaching water and mahogany dump leachate are collected and discharged into the sewage treatment system for discharge. The discharge of environmentally-friendly wastewater from unmanaged mahogany furniture enterprises must meet the first-class standard in the Integrated Wastewater Discharge Standard (GB8978-1996); in principle, the management enterprise should be pre-treated to meet the standard of the pipe and discharged into the sewage treatment plant for centralized treatment. . At the same time, enterprises are encouraged to entrust a third party with qualifications and processing capabilities to collect and handle them.

2. Air pollution prevention and control

1) Boiler. The mahogany furniture concentration area encourages the implementation of regional district heating and the promotion of clean energy. 6 steam tons (6 tons of steam per hour) The following combustion boilers must be completely phased out by the end of December 2015. New batch boilers must meet relevant requirements. If there is no centralized heating condition, the desulfurization rate of coal-fired boilers above 35t/h should be no less than 90%, the desulfurization rate below 35t/h should be no less than 60%, and the boiler air pollutant discharge standard must be met (GB13271) -2014) and total control requirements.

2) Workshop dust. Dust-generating processes such as cutting, carpentry, polishing and polishing, and workshops must be installed with dust absorption devices, which are discharged after being treated to meet the comprehensive emission standards for atmospheric pollutants (GB16297-1996).

3) Paint exhaust gas. The organic waste gas generation process such as painting and painting, and the workshop must be equipped with an exhaust gas treatment device, which is discharged after being treated to meet the comprehensive emission standard for atmospheric pollutants (GB16297-1996).

3, solid waste

Separate collection and standard disposal of solid waste. The temporary storage and disposal of solid waste and dangerous solid waste respectively meet the requirements of “General Industrial Waste Storage and Disposal Pollution Control Standards” and “Hazardous Waste Storage Pollution Control Standards”. Among them, wood chips, scraps, etc. are not allowed to be stacked in the open air; waste paint barrels containing or directly contaminated with paint residues are hazardous wastes and should be entrusted to qualified units for disposal.

4, noise aspects

Use low noise equipment and layout. Noise reduction and noise reduction measures are taken for high noise sources to enhance the daily maintenance of noise prevention facilities. Ensure that the noise at the boundary of the plant reaches the environmental noise emission standard of the industrial enterprise boundary (GB12348-2008).