Papers by Keyword: Gas Purification

Abstract: High-salt organic liquid waste treatment was a worldwide problem. It troubled many chemical industries such as medicine, pesticide, metallurgy, papermaking and dyeing. In this article, high temperature incineration technology, a new kind of process route was introduced. That’s especially suitable for organic liquid waste disposal while it divided into a variety of segmentation techniques routes. According to the types and amount of salt or different process routes, the incineration technology can turn organic waste liquid into harmless substances effectively. Meanwhile, salt resources and generate steam also be recycled in this processing as well as the gas emission was on standard. This article will contrast the different treatment methods of process routes for the route selection. By the summary of process optimization, these studies can provide strong support for decision-making in liquid waste incineration technology innovation and for applications planning.

Abstract: The structure and working process of automatic vent valve and gas purification equipment is introduced in this paper. To analyze the flow field in the valve, numerical simulations are also performed in the paper. The results show that the valve can greatly reduce the pressure of products from the oil well and acts very well in the control of the blowout on the wellhead. By using the vent valve and gas purification equipment, the back pressure of the well head can be properly handled, the frozen of the output gas can be avoid when the ambient temperature is extremely low, and the stability and reliability of the well head of the pumping unit can be improved greatly. All these can bring broad allied field for the equipment in our country.

Abstract: After a research on the existing HPF process, this paper presented a new pressurized desulfurization process, which solved low desulfurization efficiency of HPF process and applied a more simple process. The new process was simulated and optimized on the process simulation software, the operating factors of tow columns such as flow of desulfurization solution, desulfurization tower pressure, stripping tower cold-hot feed match, flow of sour gas, side withdrawing position, are studied, the best operating condition was found. The results of simulation were in good agreement with the practice.

Abstract: The numerical simulation method is used to analyze the process of gas purification with ceramic filters. The gas /solid two-phase flow field in the ceramic filter vessel was simulated using the Eulerian two-fluid model provided by FLUENT code. The variations of the pressure distribution in the filter cavity were analyzed. The distribution of the dust cake density along the under cleaning filter length was studied.

Abstract: Dioxins are extremely toxic, and it is difficult to treat them with the conventional method. When irradiated by light, photocatalysts generate strong oxidative potential and decomposes almost all organic substances containing dioxins to water, carbon dioxide and others. Silica-gel has high adsorptive activity as well as large surface area, and it is transparent to ultraviolet light. Photocatalytic silica-gel was prepared by a dip coating method using TiO2 sol obtained by hydrolyzing titanium tetraisopropoxide on silica-gel bead (about 3mm in diameter) and heat-treated at 550°C. Since the surface area of the photocatalytic silica-gel is 300m2/g, the reaction area is large and allows the highly efficient decomposition of harmful organic substances, unpleasant odors and colored matters contained in waste water. The photocatalytic apparatus for decomposition of dioxins in emission gas from waste incinerators is composed of the catalyst layer consisting of 95dm3 photocatalytic silica-gel and 16 units of UV lamp. The photocatalytic apparatus was connected to the bypass line led from the outlet duct of cyclone, and the concentration of dioxins in the exhaust gas was measured. Decomposition test of dioxins in scrubber water was also performed using a photocatalytic apparatus with 150g photocatalytic silica-gel and 8 units of UV lamp. After 0.5dm3 of scrubber water containing dioxins was circulated in the photocatalytic apparatus for 1, 2 and 24 hour, each concentration of dioxins in the water was measured. As a result, the removal efficiency over 99% of dioxins in emission gas and scrubber water from waste incinerators has been obtained.