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Ⅰ. Source and Treatment Process of Casting Waste Gas Deodorization Equipment
In the production procedures of resin sand casting, such as melting, molding, pouring and post-treatment, especially under the high pouring temperature of 1400℃-1500℃, a large amount of water vapor and chemical substances including resin, urotropine and calcium stearate are generated. After chemical decomposition, volatile odorous gases such as ammonia, acetate and hydrogen sulfide are released, accompanied by dust pollution. The pungent odor seriously pollutes the atmospheric environment and endangers human health. To solve the environmental protection problems of casting enterprises, Zhonghuan Lvzhou Environmental Protection launches professional casting waste gas deodorization equipment adopting the combined process of pulse bag dust removal + photocatalytic deodorization, realizing synchronous and efficient purification of dust and odor pollutants.
Ⅱ. Casting Waste Gas Treatment Process Flow
Casting waste gas source (pouring process) → Dust collection hood → Pipeline transportation → Pulse bag dust collector → Photocatalytic deodorization equipment → Induced draft fan → High-altitude compliant discharge
Ⅲ. In-depth Analysis of Casting Waste Gas Treatment Process
1. Pulse Bag Dust Collector: Efficient Dust Catcher
As the key pre-treatment unit, the pulse bag dust collector efficiently intercepts dust particles through high-performance filter bags. Adopting pulse jet cleaning technology, the equipment regularly removes dust attached to the filter bags to maintain stable filtering performance. It can remove more than 99% of particulate pollutants, reduce the operating load of subsequent deodorization equipment, and create favorable conditions for advanced odor purification.
2. Photocatalytic Deodorization Equipment: Complete Odor Decomposer
The dedusted waste gas enters the photocatalytic deodorization equipment for advanced treatment. Under the irradiation of high-energy ultraviolet rays, multiple purification reactions occur: on the one hand, UV rays break the chemical bonds of volatile organic compounds (VOCs) and degrade them into harmless low-molecular compounds such as carbon dioxide and water; on the other hand, ultraviolet irradiation generates ozone, which is further converted into oxygen free radicals. Combined with water vapor, strong oxidizing hydroxyl radicals are formed to completely oxidize organic waste gas such as alcohols, aldehydes and carboxylic acids, as well as odorous substances including ammonia and hydrogen sulfide into inorganic substances. Residual ozone can also directly oxidize organic pollutants to ensure thorough deodorization.
Ⅳ. Strict Compliance Standard for Casting Waste Gas Treatment
The discharged waste gas strictly complies with two national standards to ensure environmental compliance:
Secondary Standard of Integrated Emission Standard of Air Pollutants (GB16297-1996)
Secondary Standard of Emission Standards for Odor Pollutants (GB14554-93)
Core indicator: Odor concentration ≤ 2000 (dimensionless)
Note: This process focuses on the collaborative treatment of dust and odor. The core compliance indicators are based on odor and particulate matter standards. Specific pollutant emission concentration can be precisely adjusted according to on-site working conditions.
Ⅴ. Core Advantages of Casting Waste Gas Deodorization Equipment
1. Comprehensive and efficient purification: The integrated design of dust removal and deodorization achieves a dust removal rate of over 99% and an odor removal rate of over 90%. The odor concentration is stably controlled within 2000 dimensionless units to realize clean waste gas discharge.
2. High temperature resistance for harsh working conditions: Core components adapt to the high-temperature characteristics of casting waste gas. The pulse bag dust collector maintains efficient ash cleaning performance, and the photocatalytic equipment operates stably under complex gas components, meeting the demands of continuous industrial production.
3. Economical operation cost: The filter bag of pulse dust collector has a long replacement cycle. The photocatalytic equipment features low energy consumption and no consumables, with simple later maintenance, greatly reducing the environmental operation cost of enterprises.
4. Dual compliance guarantee: The process design fully meets the requirements of national air pollutant and odor emission standards without secondary pollution, helping enterprises smoothly pass environmental acceptance and daily supervision.
Ⅵ. Casting Waste Gas Treatment Engineering Cases
With mature casting waste gas treatment technology, Zhonghuan Lvzhou Environmental Protection has provided high-quality treatment solutions for many manufacturing enterprises. All equipment operates stably in compliance with dual environmental standards. Typical projects are as follows:
Zhonghuan Lvzhou Environmental Protection is a comprehensive environmental protection enterprise specializing in casting waste gas treatment and industrial odor control. Customized solutions can be formulated according to enterprise production scale and waste gas concentration. For equipment consultation and scheme customization, please feel free to contact us. We provide one-stop services including design, construction, installation and operation maintenance.
