Boiling-bed reactor
A ebullated bed reactor and reactor technology, applied in the direction of chemical instruments and methods, chemical/physical processes, etc., can solve the problems of lower product quality, catalyst sinking and accumulation, rapid rise of bed pressure drop, etc., to avoid equipment manufacturing problems, meet the long-term operation, and the effect of uniform and stable flow
Active Publication Date: 2014-01-01
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
It overcomes the shortcomings of rapid increase in bed pressure drop due to carbon deposition and metal deposition on the catalyst during fixed-bed hydrogenation
[0003] At present, the typical ebullated bed reactor described in US Re 25,770 is mainly used in industry, but this reactor process method has the following deficiencies in practical application: the amount of catalyst storage in the reactor is less, and the space utilization rate of the reactor is low. The reaction efficiency is reduced; the maintenance cost of the circulating oil pump is high, and once the circulating oil pump is malfunctioning or damaged, the catalyst will sink and accumulate, resulting in the forced shutdown of the device; the liquid product in the reactor stays under non-catalytic hydrogenation conditions If the time is too long, it is easy to carry out secondary thermal cracking reaction coking at high temperature and reduce product quality
The three-phase separator introduced in this patent has a small operating flexibility at the outlet of the three-phase separator and the outlet of the reactor. The catalyst separated by the three-phase separator will stick to the outlet of the catalyst, and the phenomenon of cross-gas is likely to occur at the outlet of the catalyst, which affects the The separation effect of the three-phase separator, and the catalyst brought out is easy to block the downstream device, which is not conducive to the long-term operation of the device
[0005] Even if a three-phase separator is used to achieve the three-phase separation of gas, solid and liquid, the operation of this component requires that the linear velocity of the three-phase gas, solid and liquid in the separation section be equal to or lower than the linear velocity of the reactor, so the reactor is installed with a cylinder of a three-phase separator The diameter of the body is larger than the diameter of the reactor, which increases the volume of the reactor. Because the reactor is a high-temperature and high-pressure equipment, the diameter-expanding structure brings difficulty to equipment manufacturing.
Method used
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Embodiment -1
[0035] According to the selection of the collector size of the present invention, a medium-sized fluidized bed reactor cold mold test has been carried out, and the size of the medium-sized cold mold device is: the inner diameter of the reactor shell=160mm, the height of the reactor shell=3000mm, the shell The effective volume is 55 liters, the diameter of the cylindrical part of the inner cylinder is 106mm, the bottom diameter of the conical opening at the lower part of the inner cylinder is 120mm, the height of the conical part at the lower part of the inner cylinder is 7mm, the diameter of the cylindrical part of the middle cylinder is 130mm, and the conical opening at the upper part of the outer cylinder is Diameter = 138mm, the diameter of the conical opening at the bottom = 125mm, the upper height of the conical part = 46mm, the lower height = 16mm, the height difference between the inner cylinder and the upper opening of the middle cylinder = 24mm, the upper opening of the...
Embodiment -2
[0037] On the basis of the cold model test, a hydrodemetallization test of an island atmospheric residue was carried out on a 60L medium-sized unit. Wherein the size of the reactor is the same as in Example 1, and the test conditions and results are shown in Table 2.
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The invention discloses an improved boiling-bed reactor, which comprises a reactor shell, a collector and a guide cone, wherein the collector is arranged on the inner upper part of the reactor shell; the guide cone is arranged below the collector; the collector comprises an inner barrel, a middle barrel, an outer barrel and a cofferdam; the upper and lower ends of the inner barrel, the middle barrel, the outer barrel and the cofferdam are open; the guide cone is arranged on the inner wall of the reactor, and has an annular projecting structure; and the longitudinal section of the guide cone along the reactor is reversely-elliptical or arc-shaped. The boiling-bed reactor disclosed by the invention has a simple structure, and is easy to operate; and separation of a catalyst from crude oil is realized by using eddy current and is ensured, and the catalyst returns into a catalyst bed layer under the action of gravity, so that the carry over quantity of the catalyst is reduced, and long-cycle running of the reactor can be satisfied.
Description
technical field [0001] The invention relates to an ebullating bed hydrogenation reactor, in particular to a reactor used for the catalyst, raw oil and hydrogen collection of the ebullating bed hydrogenation reactor. Background technique [0002] The ebullating bed reactor is a reactor that uses gas or liquid to pass through the granular solid layer to keep the solid particles in a state of suspension and motion, and conducts the three-phase interaction of gas, liquid and solid. Since the catalyst can realize on-line replacement, continuous regeneration and circulation operation, it is very suitable for processing heavy and low-quality feed oil with high metal content and high asphaltene content. Moreover, the ebullated bed reactor also has the advantages of large space velocity, small pressure drop in the reactor, uniform temperature distribution, good mass and heat transfer, high catalyst utilization, long operation period, and flexible device operation. It overcomes the s...
Claims
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IPC IPC(8): B01J8/24
Inventor王岩彭德强李欣齐慧敏王海波刘杰
OwnerCHINA PETROLEUM & CHEM CORP