[Haichuan Chemical News] The phosphogypsum-based acid production exhaust gas treatment plant at Shandong Wudi Huitai Chemical Co., Ltd. was successfully commissioned after its initial feeding process
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As of November 5, the phosphogypsum-based acid production exhaust gas treatment unit of Wudi Huitai Chemical Co., Ltd. was successfully commissioned with a single batch of feedstock and has been operating stably for two weeks. The actual sulfur dioxide concentration at the outlet is ≤30 mg/Nm3, which is better than the design specifications; the system has remained stable for nearly half a month now. It is estimated that once this system is in operation, it will reduce sulfur dioxide emissions by 812 tons per year, and enable the production of 1,680 tons of the fertilizer sulfuric acid.
According to Song Quan, general manager of Huitai Chemical, the sulfuric acid production unit of Huitai Chemical handles a total flow of 35,000 Nm3/h of flue gas, with a sulfur dioxide content in that exhaust gas of 3,000 mg/Nm3; as a result, 840 tons of sulfur dioxide are emitted annually. The phosphogypsum-based acid production exhaust gas treatment project utilizes the sulfuric acid exhaust gas desulfurization technology jointly developed by Shandong Yingxiang Environmental Protection Technology Co., Ltd. and Shandong Honghao Energy Saving Technology Co., Ltd. The sulfur dioxide concentration at the inlet of the flue gas desulfurization system is set at 3000 mg/Nm3, while the sulfur dioxide concentration at the outlet is kept at ≤100 mg/Nm3. Ammonia water with low added value, produced from the vent gas from the liquid ammonia storage tank, is then used to absorb sulfur dioxide in the flue gas; the resulting sulfuric acid is further processed into sulfur-based compound fertilizers with high added value. This project features low installation costs, small land footprint, high mass transfer efficiency, high space utilization within the tower, a low liquid-to-gas ratio, and low operational energy consumption. It can reduce sulfur dioxide emissions by 812 tons per year and produce 1,680 tons of the fertilizer sulfuric acid AN. No secondary pollutants are generated throughout the entire process, and there is no trailing effect during operation.
Xu Binggang, general manager of Honghao Energy Saving Company, told reporters that the installation was carried out through renovations in the old production area of Huitai Chemical, and the construction was quite challenging. In accordance with the client’s requirements, it was also necessary to make use of some of the existing equipment. We held numerous discussions regarding the process design and related procedures. Considering that the project is located by the sea where winds are strong throughout the year, special attention was paid to strengthening the external framework of the desulfurization tower to ensure its safety； During the trial operation, foaming of the desulfurization liquid occurred due to dirt inside some of the older equipment; the on-site technical staff and workers worked throughout the night to identify the problem and address it promptly, thereby ensuring smooth operation of the entire process and achieving results that met or even exceeded the design specifications. It is understood that at present, the process commonly used in China for desulfurizing the exhaust gases generated during the production of acid from phosphogypsum is the calcium method; this method has a low desulfurization efficiency, requires large amounts of circulating fluid, and can lead to excessive levels of dust in the flue gas due to the carryover of desulfurization liquid with the airflow. At the same time, sulfur-containing gypsum produced by the calcium method has low added value, requires large storage space, is prone to cause secondary environmental pollution, and is difficult to dispose of.
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Why are all newly established companies like this (*inconsistent violations can be seen everywhere)? It’s still a problem of lack of emphasis on the part of management; it seems that achieving production operations is the ultimate goal: lol
Those who aren’t wearing safety helmets are from design companies; they lack a strong sense of safety and have strong personalities.\ud83d\udc4d
【Haichuan Chemical Industry Site】Shengjingba Salt Industry Site in Pengshui, Chongqing https://bbs.hcbbs.com/thread-2156099-1-1.html (Source: Haichuan Chemical Industry Forum Website)
Although they are not employees of our company, they are still contractors, suppliers, or partners who operate in your area. If our safety supervisors or company leaders discover such situations on site, they will deal with the owner’s company without any leniency; P