Reactor and method for reinforcing heavy oil conversion and reducing gasoline olefin
A reactor and gasoline technology, applied in the petroleum industry, dealing with hydrocarbon oil, etc., can solve the problems of large gasoline loss, low cracking activity, low agent-oil ratio, etc., and achieve the effect of high-efficiency contact
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Embodiment 1
[0030] attached figure 2 It is a schematic diagram of the riser reactor provided by the present invention. Such as figure 2 As shown, the riser reactor is composed of two sections of straight pipes with different diameters, the top is thick and the bottom is thin, and the middle is connected by a circular frustum-shaped variable diameter section. The upper and lower diameters of the circular table are equal to the diameter of the straight pipe. The included angle between the generatrix of the circular frustum and the axis is 10-60°, preferably 20-50°. The length ratio of the thick straight pipe to the thin straight pipe is 2 / 1˜1 / 4, preferably 1 / 1˜1 / 2. The superficial gas velocity in the thick straight pipe is not lower than 4m / s, preferably not lower than 7m / s.
[0031] A feeding loop is installed at the bottom of the thick straight pipe of the riser, and multiple nozzles are arranged on the loop. The orientation of the nozzles on the feed collar can be coplanar with the...
Embodiment 2
[0034] This example simulates the effect of the form of the feed loop on the catalyst density in the riser.
[0035] A cold circulating fluidized bed experimental device is adopted, the fluidizing medium is air, the particles are ordinary catalytic cracking balancer, and the structure of the riser is as described in Example 1. The thin straight section of the riser is 4m long and 0.1m in diameter, and the thick straight section is 6m long and 0.14m in diameter. The superficial gas velocity in the riser is 12m / s, and the air intake of the ring pipe is 50% of that of the nozzle. A measuring port is set at 0.37m above the ring pipe, and the catalyst solid content of the cross-section is measured by the equal area method with a PC6D particle concentration measuring instrument when different forms of ring pipes are used. The ring pipe nozzle rotates along the tangential direction of the ring pipe, and the angle between the nozzle and the ring pipe plane is 70°. The experimental r...
Embodiment 3
[0043] In this example, the riser reactor of Example 1 is used in the circulating fluidized bed reaction regeneration system to carry out heavy oil conversion and gasoline olefin reduction.
[0044] Light gasoline and recycled oil are sprayed into the riser reactor through the feeding ring pipe nozzle and the heavy oil atomizing nozzle respectively. The light gasoline accounts for 50% of the weight of the recycled oil, and the light gasoline is fed at room temperature. Heat to 300°C, the axial average gas velocity in the riser is 5.0m / s, and the temperature at the riser outlet is 500°C. Under the action, it flows upwards along the riser, first mixes with the atomized raw material sprayed from the nozzle, and then undergoes cracking reaction during the continuous upward flow, and then mixes and reacts with the light gasoline injected from the nozzle of the feed ring pipe. The product distribution and gasoline group composition are shown in Table 2.
[0045] Table 2
[0046] ...
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