【Haichuan Chemical Salary News】Weng’an Yellow Phosphorus Company was the first in the industry to eliminate flares in yellow phosphorus production
Thread Content
Weng’an Yellow Phosphorus Company was the first in the industry to eliminate the use of flames in yellow phosphorus production. Wengfu Online, 1113, 20:08. On November 6th, the work to upgrade the exhaust gas recovery systems for the four yellow phosphorus production units at Weng’an Yellow Phosphorus Company was completed successfully. After 72 hours of trial operation, the company became the first in the industry to do without flames in yellow phosphorus production, thereby solving the long-standing problem of having to burn off the exhaust gases, and promoting more energy-efficient and environmentally friendly production practices. It is understood that producing one ton of yellow phosphorus generates 2,800–3,000 m3 of exhaust gas. Since the phosphorus yellow waste gas recovery unit was put into operation on September 12, the technical staff at Weng’an Phosphorus Yellow Company discovered that due to issues such as insufficient pumping capacity of the vacuum pumps used for transferring the phosphorus yellow waste gas, the waste gas recovery rate reached only 60% of the design requirement. As a result, the waste gas generated by the four phosphorus yellow furnaces could not be fully sent to the waste gas power generation unit, which prevented it from operating as designed; consequently, the waste gas had to be released into the atmosphere for combustion. To this end, Weng’an Yellow Phosphorus Company established a specialized technical team to conduct research on how to improve tail gas recovery; through thorough analysis, a renovation plan for yellow phosphorus tail gas recovery was proposed. The safety, production, equipment and other departments of Weng’an Yellow Phosphorus Company mobilized all their staff and made coordinated arrangements; by ensuring safety, they overcame difficulties such as the short downtime and the residual gas left in the system pipes, thereby minimizing the impact of the plant shutdown for renovation on production. Ultimately, the renovation of the exhaust gas recovery systems for the four yellow phosphorus furnaces was completed in stages over 10 days. The upgraded phosphorus yellow waste gas recovery system is capable of recovering all of the waste gas. While generating economic benefits, it was the first in the industry to eliminate the need for flames in phosphorus yellow production, thereby promoting environmental protection and energy efficiency in such production processes. The power output of the waste gas power generation unit exceeded 10,000 kWh per hour for the first time after the upgrade. Currently, the technical staff at Weng’an Yellow Phosphorus Company are working on solving the problems encountered in the transfer of exhaust gases, to ensure that these recovered exhaust gases can be utilized further. Photos: Gan Yuanchao Editor: Xu Zhe Reviewer: Zhou Honggang
By the end of 2017, yellow phosphorus manufacturers in Yunnan Province accounted for almost half of those in the whole country. However, during unannounced inspections, inspectors found that in areas such as Anning and Jinning districts in Kunming, as well as Lufeng and Wuding counties in Chuxiong, there were numerous yellow phosphorus plants that did not meet the required standards yet continued to operate illegally, causing immeasurable damage to the environment.
Just because the torch is burning properly doesn’t mean it’s environmentally friendly
As a result, the exhaust gas generated by the four yellow phosphorus furnaces cannot be fully sent to the exhaust gas power generation unit, which prevents it from operating as designed; consequently, the exhaust gas has to be released into the atmosphere for combustion. -------------------------------------------- Comprehensive utilization of exhaust gases is also an option, which is better than simple combustion
The way to achieve comprehensive utilization is through environmentally friendly measures
Recently, reporters learned that the comprehensive utilization project for yellow phosphorus exhaust gas at Longma Phosphorus Industry Co., Ltd., located in the Qingkeng Industrial Park under the Yongyang Sub-district Office in Weng’an, is expected to be fully completed by the end of September.
When the reporter arrived at the construction site of this project, he saw that the entire site was bustling with construction activities; large machinery was in constant use, and workers were working diligently, with the project progressing at full speed. The comprehensive utilization project for yellow phosphorus exhaust gas at Longma Phosphorus Industry Co., Ltd. covers an area of 180 mu, with a total investment of 150 million yuan. The construction will be carried out in two phases, including the recovery and transportation of yellow phosphorus exhaust gas, pre-treatment of the exhaust gas, the construction of power generation facilities, boiler installation, as well as the development of roads, land leveling, and landscaping. It is expected that all works will be completed by the end of September.
During the project construction, relevant departments such as the Yongyang Sub-district Office took proactive steps to provide services to the enterprise, assisting it with tasks such as land acquisition and demolition, the relocation of high-voltage power lines, and the handling of various procedures related to project construction, thereby ensuring that the project was carried out in a legal, scientific, and standardized manner. It is understood that once this project is completed, the company will use reverse osmosis membranes and ultrafiltration to collect and treat the wastewater from the yellow phosphorus waste gas utilization project as well as from the entire manufacturing facility, thereby achieving resource recycling. Among them, the wastewater treatment plant of the project has a capacity of 3,000 cubic meters; it can handle 20,000 cubic meters of yellow phosphorus exhaust gas per hour. Initially, it is estimated that the power generation capacity will be 14,000 kWh per hour. This setup enables effective recovery and treatment of yellow phosphorus exhaust gas, thereby reducing pollution while facilitating resource recycling and efficient utilization. (Written by Yang Changyu and Chen Yunlong)