62results about How to "Raise feed temperature" patented technology

The invention method and a system for optimizing hydrorefining low-pressure deoxygenation and feeding heat exchange for naphtha. The method includes that the naphtha is filtered and is subjected to heat exchange, then is fed into a deoxygenation tower to be subjected to deoxygenation treatment, the tower top pressures are flexibly controlled so that different working conditions can be adapted, tower-top gas phases are cooled and then are fed into a tower-top return tank, liquid phases completely return a tower top, and non-condensable gas on the top of the return tank is exhausted into a torch pipe network; a part of deoxygenated naphtha distilled at a tower bottom is fed into a reboiler at the bottom of the deoxygenation tower and is heated to obtain partial gas phases and partial liquid phases, and then the partial gas phases and the partial liquid phases return a tower kettle; heat is exchanged between another part of deoxygenated naphtha distilled at the tower bottom and filtered naphtha, and deoxygenated naphtha is used as a naphtha hydrogenation material after being subjected to heat exchange. The system comprises a naphtha feeding filter, a deoxygenation tower feeding and deoxygenated naphtha heat exchanger, the deoxygenation tower, a deoxygenation tower-top cooler, the deoxygenation tower-top return tank and the deoxygenation tower-bottom reboiler. The method and the system have the advantage that hydrorefining low-pressure deoxygenation and feeding heat exchange for the naphtha can be optimized by the aid of the method and the system.

The invention provides a device for blending catalytic slurry oil in delayed coking technology. The device comprises a slurry oil tank, a slurry oil pump and a slurry oil heating furnace, which are individually arranged, the slurry oil tank, the slurry oil pump and the slurry oil heating furnace are connected one by one, and the outlet of the slurry oil heating furnace is connected to the outlet of an oil slag heating furnace of a delayed coking device. The invention also provides a method for blending catalytic slurry oil in delayed coking technology by utilizing the device. The method comprises following steps: (1) high-temperature catalytic slurry oil is transported to a slurry oil tank by a catalytic cracking unit, then is transported to a slurry oil heating furnace by a slurry oil pump, and is heated to the temperature of 505 to 550 DEG C; (2) the high-temperature coking oil heated by the slurry oil furnace is mixed with the high-temperature coking oil in the outlet of the oil slag heating furnace of the delayed coking device, and then the mixture is transported to a coke drum to have consequent reactions. The device for blending catalytic slurry oil in delayed coking technology realizes individual temperature control of the oil slurry heating furnace outlet, increases the liquid yield of the coke drum and reduces the coke yield. The whole equipment abrasion and corrosion are changed to part abrasion and corrosion, so the maintenance cost of the equipment is reduced, and the general efficiency of the delayed coking device is improved.

A MEG reclamation process includes the step of increasing above 2,000 ppm the divalent metal salts concentration of a rich (wet) MEG feed stream flowing into a precipitator. The increasing step includes routing a salts-saturated MEG slipstream from the flash separator it to the precipitator. The slipstream may be mixed with a fresh water feed stream, a portion of the rich MEG feed stream, or some combination of the two. The rich MEG feed stream also may be split into two streams, with a portion of the stream being heated and routed to the flash separator and the other portion being combined as above with the removed slipstream. The process can be performed on the slipstream after dilution and prior to entering the precipitator or after being loaded into the precipitator. Removal of the insoluble salts may be done in either a batch or continuous mode.

The invention discloses a preparation method of di-tert-butyl peroxide. Tert-butyl alcohol, hydrogen peroxide and a catalyst are continuously introduced into a micro-reactor, so that tert-butyl alcohol and hydrogen peroxide are subjected to a peroxidation reaction, and a material flow containing a di-tert-butyl peroxide is prepared; the material flow containing the di-tert-butyl peroxide is led out from the micro-reactor, and the di-tert-butyl peroxide is obtained through separation, washing and drying, wherein the molar ratio of tert-butyl alcohol to hydrogen peroxide is 1:2-1:2.2, and the catalyst accounts for 10-20% of the total mass of tert-butyl alcohol, hydrogen peroxide and the catalyst. The process is simple, the micro-reactor good in safety is used for continuous production, the prepared di-tert-butyl peroxide is high in reaction selectivity and good in yield, the production procedures are reduced, and the production cost is reduced.