CN1330130A

CN1330130A - Water washing and settling process for separating catalyst powder from catalytically cracked oil

Info

Publication number: CN1330130A
Application number: CN 01113134
Authority: CN
Inventors: 赵开鹏; 沈震林
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-25
Filing date: 2001-06-25
Publication date: 2002-01-09

Abstract

A process for separating the catalyst powder from catalytically cracked oil slurry by water washing and settling includes such steps as adding water (5-10%) and surfactant-type settling assistant (100-1000 MMP), stirring, natural settling at 60-90 deg.C for 12-60 hr, and periodically discharging the mixture of catalyst powder and water. Its advantages are less investment and high removal rate up to 85-98%.

Description

Wash the method for catalyst fines in the settlement separate catalytically cracked oil

The invention belongs to the solid-liquid separation technique field, particularly relate to a kind of from catalytically cracked oil the method for separating catalyst powder.

In petroleum refining industry, wax slop also can remain the slurry oil that a part contains a large amount of catalyst fineses after catalytic cracking process is produced gasoline, diesel oil, liquefied gas, this part slurry oil calorific value is still higher, but to utilize this part slurry oil preferably, just must remove catalyst fines in the slurry oil.The method that removes catalyst fines in the slurry oil at present generally has centrifugal separation, filtration method and electrostatic separation method etc.For example: in the CN97121100.0 patent application, disclose a kind of with slurry oil through temperature regulation, flow control, the method that enters high temperature separating centrifuge isolation of purified, the separable solid content that obtains is less than 0.02%, the clarified oil of de-solid rate more than 92～98%.In the CN99109217.1 patent application, be, adopt parallel way to connect, realize that by steps such as filtration, back flushing, dilutions the catalyst solid particle separates with slurry oil three filter plants.Also having the electrostatic separation technique of Sinopec Nanjing Refinery exploitation, is in the high tension electrostatic field, makes the ballotini polarization, and the catalyst fines in the slurry oil is adsorbed on the glass sphere, and slurry oil is purified.When the absorption of glass sphere reaches capacity, back flushing, washing fluid is taken away catalyst fines.More than these methods can both remove catalyst fines in the catalytically cracked oil effectively, but exist facility investment bigger, treatment capacity is less, problems such as service temperature height.

The objective of the invention is for catalytically cracked oil removes catalyst fines, a kind of technical process, simple, easy to operate, the safety of equipment are provided, reduced investment, working cost is low, and can realize the method that serialization is produced.

The technical scheme that realizes above-mentioned purpose is: add 5～10% water in catalytically cracked oil, make settling aids with ethers or amine, the aromatic ring compounds of 100～1000PPM or the tensio-active agent that contains groups such as vinyl, methyl, oxyethyl group, epoxypropyl, and it is fully evenly mixed, the slurry oil temperature remains on 60～90 ℃ in the slurry tank, natural subsidence 12～60 hours is regularly discharged the catalyst fines of slurry tank bottom and the mixture of water.

The inventive method technology, equipment are simple, and reduced investment is easy to operate and safe, and the serialization production of the scarfing cinder that can realize not stopping work, and the catalyst fines decreasing ratio of slurry oil can be up to 85～98%, and is good in economic efficiency.

Be several embodiments of the present invention below.

Embodiment 1, raw material is certain factory's catalytically cracked oil, it is assorted 0.74% to contain machine such as catalyst fines, adds water 5% in this slurry oil jar, adds ether compound auxiliary agent 100PPM, stir, the slurry oil temperature remains on 55 ± 5 ℃, after 24 hours natural subsidence, and sampling analysis, in the slurry oil machine such as catalyst fines assorted be 0.11%, the catalyst fines decreasing ratio reaches 85%.

Embodiment 2, the catalytic cracking externally extracting oil that contains machine such as catalyst fines assorted 0.70% that comes out from fractionating column, behind heat exchanger, enter first static mixer, flow according to slurry oil, water with volume pump adding 8%, after mixing evenly with slurry oil, enter second static mixer, add the settling aids aminated compounds with volume pump simultaneously, additional proportion is the 200PPM of slurry oil amount, after mixing evenly, enter slurry tank, when the liquid level of slurry tank arrives desired indicator, stop charging, or switching enters another slurry tank; Be provided with the steam coils well heater in the slurry tank, the steam regulation flow keeps 75 ± 5 ℃ of jar interior slurry oil temperature, natural subsidence 36 hours, and sampling analysis, catalyst fines drops to 0.07% in the slurry oil, and the catalyst fines decreasing ratio reaches 90%.In settling process, the sediment that mixes of the catalyst fines at the bottom of the venting jar and water regularly as required, because slurry tank is equipped with oily water separation warning howler and magnetic valve, in case there is oil to discharge, magnetic valve can cut out automatically immediately and stop to discharge.

Embodiment 3, and technical process and equipment are identical with embodiment 2.Concrete technic index is: the raw material slurry oil contains catalyst fines 0.79%, adds water 7%, with sinking agent: contain methyl tensio-active agent 300PPM, 85 ± 5 ℃ of slurry tank slurry oil temperature controls, 60 hours settling times.Sampling analysis, catalyst fines reduces to 0.02% in the slurry oil, and it is 97.5% that catalyst fines takes off the rate of falling.

Embodiment 4, and technical process and equipment are identical with embodiment 2.Concrete technic index is: the raw material slurry oil contains catalyst fines 0.98%, add water 10%, with sinking agent: aromatic ring compounds 1000PPM, slurry tank slurry oil temperature remains on 60 ± 5 ℃, 12 hours settling times, sampling analysis, catalyst fines reduces to 0.125% in the slurry oil, and catalyst fines takes off the rate of falling and reaches 87%.

Claims

1, a kind of method of washing catalyst fines in the settlement separate catalytically cracked oil, it is characterized in that in catalytically cracked oil, adding 5～10% water, ethers or amine with 100～1000PPM, aromatic ring compounds or the tensio-active agent that contains groups such as vinyl, methyl, oxyethyl group, epoxypropyl are made settling aids, and thorough mixing is even, the slurry oil temperature remains on 60～90 ℃ in the slurry tank, natural subsidence 12～60 hours is regularly discharged the catalyst fines of slurry tank bottom and the mixture of water.

2, press the method for catalyst fines in the settlement separate catalytically cracked oil of the described washing of claim 1, it is characterized in that adding in catalytically cracked oil water and settling aids and evenly mixed preferred approach is, two static mixers are set before slurry tank, when the raw material slurry oil enters first static mixer, flow according to slurry oil, add a certain proportion of water with volume pump, enter second static mixer after mixing evenly, to second static mixer in add and slurry oil amount proportional settling aids with volume pump this moment, after mixing evenly, enter slurry tank.

3,, it is characterized in that slurry tank is equipped with the oily water separation warning howler and the magnetic valve that mix sediment that can accurately separate the catalyst fines of getting rid of jar end and water by the method for catalyst fines in the settlement separate catalytically cracked oil of the described washing of claim 1.