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Weijun L.,Wuhan Refining and Chemical Engineering Design Co. | Rui L.,Wuhan Refining and Chemical Engineering Design Co.
Petroleum Refinery Engineering | Year: 2013

To ensure that the force on the pump nozzle doesn' t exceed its allowable value, it is necessary to have a detailed simulation analysis of the piping connecting pump nozzle. The stress analysis software is applied to simulate the forces on the vacuum tower bottom pump nozzle in cold and hot conditions, the causes of greater thrust to the pump are studied and the piping design which can effectively lower the force on the pump nozzle is developed. The results show that inappropriate piping design of pump nozzle (the force on pump nozzle is 7 times higher than the specification in standard API610) is the culprit of leaking of pump nozzles. It is also pointed out that the following designs can be adopted for the inlet and outlet piping of vacuum tower bottom pump to effectively reduce the force and torque of pump nozzles: (1) the pump suction nozzle can be placed beside the pump, and the pump nozzle is connected with T filter with bend, and the spring support is installed at the filter; (2) elbow can be provided at the pump discharge nozzle, and the support is installed on the ground at the elbow. By changing the piping design, the load on the bottom pump nozzle has been lowered to about 3 times the specification of standard API610.


Fuzi C.,Wuhan Refining and Chemical Engineering Design Co. | Jing Z.,Wuhan Refining and Chemical Engineering Design Co. | Xiang X.,Sinopec | Yong D.,Sinopec
Petroleum Refinery Engineering | Year: 2014

The process of liquefied petroleum gas sweetening for a 1. 2 MM TPY delayed coking unit is introduced. In this process, fiber membrane reaction technology is adopted. The causes of a large amount carryover of liquid caustic in solvent gasoline in solvent reverse extraction are analyzed, and it is decided to revamp the oxidation tower and alkali separation tank in alkali regeneration section. At the same time, the solvent gasoline washing process is added, which adopts vortex extraction separation process to separate solvent gasoline from water. At the maximum 18% alkali in solvent, the alkali at the outlet of alkali separator is less than 1.0 %. The solvent gasoline from the unit meet the required specifications.


Fuzi C.,Wuhan Refining and Chemical Engineering Design Co. | Chengcui L.,Wuhan Refining and Chemical Engineering Design Co. | Jing Z.,Wuhan Refining and Chemical Engineering Design Co. | Wei W.,Sinopec | And 3 more authors.
Petroleum Refinery Engineering | Year: 2015

The upgrading revamping of feedstock hydrotreating unit for a 1. 8 MM TPY FCC unit of Wu-han Refining & Chemical Engineering Company is deseribed. The hydrotreatment of FCCU feedstoek was to maximumly reduce the total sulfur in FCCU feedstock. At the same time, the existing OCT-M process for FCC gasoline was optimized, the hydrotreating catalysts were replaced with new generation catalysts FGH-31/FGH- 21 and new generation OCT-MD process was applied to treat FCC gasoline with 250 ∼575 ppm sulfur to produce GUO IV specification gasoline. After hydrotreatment, the total sulfur of feedstoek is 900 ∼ 1 O(X) ppm, the octane loss is 0. 5 ∼0. 9 unit, the sulfur in gasoline is no higher than 50 ppm and olefin in gasoline is no higher than 25%. The performance tests of OCT-MD process feedstock and products, the sulfur in FCC gasoline is 350 ppm and sulfur in OCT-MD product gasoline is 38 ppm, the RON loss is no greater than 1.5 units, the gasoline yield is now lower than 99.9% , and product gasoline meets GUO IV specifications.


Si C.,Wuhan Refining and Chemical Engineering Design Co.
Petroleum Refinery Engineering | Year: 2015

Recovery and utilization of refinery flare gas are introduced. The existing problems in flare system are analyzed, and the revamping design of make-up fuel gas system of refinery flare gas, control and selection of compressor are proposed. The pressure drop at the outlet pipeline of flare gas and capacity of flare gas desulfurization unit are calculated to meet the requirements that the pressure drop of flare gas caused by make-up fuel gas system for refinery flare gas is no greater than 0. 7 MPa and H2S is no higher than 100 ppm. The project implementation comparison and economic analysis show that 8869 tons of natural gas are saved each year. 12 320 tons of fuel gas for supply to the boiler are reduced. The annual economic benefit is 23. 29 million Yuan RMB. The economic benefit is significant for a total investment of 9.0 million Yuan RMB.

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