Nested solid-liquid-liquid three-phase cyclone separator

Abstract

The invention provides a nested solid-liquid-liquid three-phase cyclone separator. The nested solid-liquid-liquid three-phase cyclone separator comprises a solid-liquid cyclone separation section and a liquid-liquid cyclone separation section, and the liquid-liquid cyclone separation section is nested in the solid-liquid cyclone separation section; and the solid-liquid cyclone separation section comprises a cylindrical section, a conical section and a solid discharge tail pipe, the liquid-liquid cyclone separation section comprises an inner cylindrical section and an inner conical section, the lower end of the inner cylindrical section is connected with the large-diameter upper end of the inner conical section, and the inner cylindrical section and the inner conical section are integrally located in the cylindrical section and the conical section. Through the nested structural design, the whole device is small in occupied area, short in process route and short in separation time, and three-phase integrated continuous separation operation of oil, water and coke powder can be realized.

Description

technical field [0001] The invention relates to the fields of delayed coking wastewater treatment, chemical industry, environmental protection and the like, in particular to a nested solid-liquid-liquid three-phase cyclone separator. Background technique [0002] The delayed coking process has low investment and operating costs, simple process and high conversion depth. It is widely used in the decarbonization production of heavy oil, residual oil and asphalt oil with high carbon content. More than 85% of the coking treatment units in the world are used. Using delayed coking process. However, the delayed coking unit of the refinery will produce a large amount of sulfur-containing wastewater, which has the characteristics of high concentration of hydrogen sulfide and ammonia nitrogen, and contains more coke powder and emulsified oil. Before the sulfur-containing wastewater is biochemically treated and discharged up to the standard, steam stripping is often used to remove sul...

AI Technical Summary

Problems solved by technology

Among them, the gravity sedimentation method has a long separation time and low efficiency; the flocculation method needs to consume water treatment chemicals, and the operation cost is high; the automatic backwash filter switches frequently, and often automatically shuts down due to the high pressure difference of the filter. There are problems of high purchase cost and high maintenance cost, and the overall use effect is not ideal; the ceramic membrane is expensive and difficult to popularize and apply; the cyclone separation method has the advantages of small investment, simple and reliable operation, small footprint, and high separation efficiency. Therefore, many companies use filtration-cyclone or gravity sedimentation-cyclone combination process to remove oil and coke powder in sulfur-containing wastewater

However, the device used in the combined process is complex and occupies a large area. Therefore, it is of great significance to develop an integrated compact cyclone that can realize the three-phase separation of oil, water and coke powder.

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