Dust control and recycling project

In the traditional process of domestic PVC production using the calcium carbide method, a large amount of dust is generated as waste during the crushing and transportation of calcium carbide, which has a significant impact on the environment. Shandong Zhanggu Pneumatic Conveying Engineering Company uses an exclusive nitrogen circulation conveying system to recover and utilize calcium carbide dust, mixing the collected dust with raw calcium carbide in a certain ratio and feeding it into the acetylene generator to produce acetylene.

Dust recovery and reuse technology is a key area in industrial environmental protection and resource recycling. By efficiently collecting and processing dust generated during production, it enables resource regeneration and pollution control. Here’s a comprehensive analysis based on technical principles, applicable scenarios, and innovation directions:

1. Core Recovery Technology Paths

Sorting and Purification Technologies

Physical sorting: For mixed dust (like metal or mineral dust), useful components can be separated through screening, magnetic separation (such as a magnetic roller for iron removal), gravity separation, and other methods.

Chemical purification: For chemical raw material dust (e.g., carbide dust), valuable chemicals can be obtained through hydrolysis or chemical reactions.

Biological treatment: Microbial degradation technology is applied for recovering organic dust.

Resource Utilization Directions

Industrial raw materials: Metal dusts (iron, aluminum) can be directly smelted; non-metal dusts (quartz, feldspar) can be used in construction materials or ceramics.

Road engineering: Rubber powder can modify asphalt to improve road wear resistance; lime dust can be used for soil improvement.

High-value products: Ultrafine nano feather dust can be used as carriers in biomedicine or as catalysts for air purification; carbide dust, after recovery, can be used as PVC production material.

Innovations in Dust Collection and Transport

Closed negative-pressure systems: Using regionally enclosed negative-pressure ducts in carbide storage and transport to prevent acetylene explosions.

Dust-prevention design: Spiral pipe conveying paired with vibration sources (e.g., for cement dust recovery) to avoid secondary pollution.

Wet dust suppression: Atomized spraying reduces dust dispersion, combined with cartridge filter dust collection.

Using this method not only solves the environmental problems caused by calcium carbide dust in a safe, reliable way with low nitrogen consumption, but also allows the dust to be reused in acetylene production, reducing the consumption of calcium carbide. This system can generate substantial economic benefits for enterprises every year.

Shandong Zhangqiu Blower Co., Ltd.

After-Sales Service and Quality Assurance Commitment

Shandong Zhangqiu Blower Co., Ltd. has always prioritized product quality. In November 1996, it officially passed the GB/T19001-ISO9001 quality certification and has consistently implemented it. At the same time, the company always regards after-sales service as extremely important. The idea of 'responding to customers' urgent needs and thinking from the customers' perspective' has long been integrated into the conscious actions of all employees, and the company publicly makes a solemn commitment to society:

1. Zhanggu has 54 sales offices nationwide, each equipped with dedicated maintenance personnel to quickly resolve any quality issues customers may encounter. Company staff can arrive on-site within 24 hours;

2. For customers using Zhanggu products, the company promises to arrange technical or maintenance personnel for on-site guidance during installation according to customer requirements. After installation, company staff will be responsible for on-site commissioning guidance;