【Special Equipment】Special ejector for PSC series desulfurization regeneration tanks

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The late desulfurization expert, Professor Gao Hua, began in the early 1970s to promote and apply the desulfurization injector regeneration technology, which he had spent most of his life researching and developing, in nitrogen fertilizer plants across the country. By the early 2000s, this technology had been applied in the coking industry and other sectors, with its scope of use expanding increasingly. In recent years, through extensive research and experimentation, our company has conducted in-depth studies on the structure and working principles of injectors, and ultimately developed the PSC-type injector specialized for the oxidative regeneration of desulfurization fluids. This injector makes full use of the advantages of the co-current principle, with the desulfurization liquid passing through the nozzle of the injector at high speed to form a jet. This jet creates a local negative pressure to draw in air. At this point, since the two-phase fluid is immediately dispersed at high speeds and is in a state of high-speed turbulence, the gas-liquid contact surface **increases and is continuously renewed**, thereby enabling the mass transfer process to proceed extremely rapidly. 1 The product structure of the injector consists of a liquid inlet, an air inlet, a liquid supply pipe, a nozzle, an air chamber, a throat, a diffusion tube, and a tail pipe. As shown in the diagram, when the pressure at the liquid inlet is 0.4–0.5 MPa, the flow velocity at the nozzle is 18–25 m/s; the amount of liquid sprayed by the ejector depends on the size of the nozzle. 2 Performance and specifications of the injectors (for some models): Note: All injectors use 304 nozzles to prevent erosion and corrosion. The selection of injectors should be determined based on the production conditions of each plant. Our company can also manufacture injectors in special specifications to meet the production needs of our customers. 3 Requirements for the transportation, installation, and use of the injector ◆ The parts of the injector below the throat tube that come as part of the main unit should be separated during placement and transportation. The injector itself needs to be protected from collisions to prevent deformation and any impact on its concentricity. ◆The ejector should be installed vertically and concentrically; the tail pipe can be fixed to the channel steel bracket using clamps. The position of the air intake can be determined based on actual conditions, but it is necessary to ensure sufficient intake of fresh air. The installation of the ejector’s main body can be carried out according to the plan provided by our company’s engineering technicians. ◆Each injector has a working area of about 2 m2 in the tank. The area of the cross-mixing zone generally does not exceed 0.5 m2, and the number of injectors is determined based on factors such as the circulation volume of the regeneration solution, the desulfurization load, the purity of the gas, the type of gas to be removed, and the operating conditions. The injectors should be arranged reasonably in the tank. ◆The dimensions of the mixer tube, diffuser tube, and tail pipe of the ejector must be determined based on parameters such as the height of the foam overflow weir in the regeneration tank, the effective liquid level height, and the height of the porous plate, as well as the operating conditions of each plant, in order to better meet the production requirements. 4 Precautions ◆ When the ejector is in operation, the liquid inlet valve must be fully open; it should not be partially open, as this will affect the regeneration efficiency of the rich liquid. ◆When the air intake volume decreases or a small amount of liquid splashes out from the air inlet, this injector should stop operating, and the sulfur deposits and debris in the nozzle, mixing tube, and the bottom of the negative pressure chamber must be cleaned. ◆Our factory possesses the capability for precision casting and processing of injectors. All products, regardless of their specifications, are tested under simulated production conditions before leaving the factory to ensure they meet quality standards. It is important to prevent damage or deformation during installation, maintenance, and cleaning, so as not to affect their performance. 5 Performance in applications: Since its introduction to the market, this product has achieved remarkable results and received high praise from a large number of customers. It has currently been adopted by more than 100 fertilizer and coking manufacturers, including Anhui Fuyang Haoyuan Chemical, Lai’an Jinhé Industrial Co., Ltd., Guizhou Kailin, Shandong Shouguang Alliance Chemical, Tancheng Hengtong Chemical, Luxi Chemical, Linyi Jiutai Chemical, Shanxi Jinxiang Chemical, Linfen Tongshida Coking, Gaoping Jinfeng Coal Chemical, Xiaoyi Weihong Coking, Hunan Liansteel Coking, Hubei Yihua, Zhaoyang Chemical, Yunnan Qujing Qilin Coal Chemical, Xinjiang Baoming Mining, Hebei Cangzhou Mingliang Chemical Machinery, Shaanxi Yanchang Petroleum Sihai Coal Chemical, Inner Mongolia Wuhai Western Coal Chemical, Tongliao Meihua Biotechnology, Tongliao Jinmei Chemical, Jiangsu Nantong Zhengtuo, and Jilin Cornell Company.