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Catalytic reaction equipment and method

A catalytic reaction and equipment technology, applied in chemical instruments and methods, catalytic cracking, cracking, etc., can solve problems such as difficulty in realizing industrialization, the pressure difference between the lifting section and the riser reactor cannot be too large, and the line speed of the lifting regenerant is low. , to reduce side reactions, shorten the oil contact mixing time, and improve the oil contact efficiency.

Active Publication Date: 2019-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Chinese patent CN1194073A discloses a catalytic cracking downward reaction method to achieve ultra-short-time contact of gas and solid, relying on the gravity of the catalyst to reduce back-mixing, but the initial velocity of the catalyst is low, and the distribution of the catalyst is difficult to achieve uniformity, and the results of the experimental investigation are not ideal , it is difficult to achieve industrialization
[0009] U.S. Patent No. 4,717,467 separates the part where the regenerant enters the pre-lift section from the part where the riser oil agent contacts, and the lift gas is lifted through a thinner pipeline to accelerate the regenerant into the riser, but the pressure between the riser section and the riser reactor The difference should not be too large, otherwise the riser will be reversed to the regenerator, and the device will not be able to circulate. Limited by the pressure difference in the lift section, there will not be enough pressure to convert the upward kinetic energy of the regenerant, and the line speed of lifting the regenerant will be low.
[0010] U.S. Patent US5318691 achieves the purpose of uniform oil agent distribution by designing the distribution of the nozzle and the pre-lift section, but it cannot solve the problem of low upward movement speed of the regenerant. long question

Method used

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  • Catalytic reaction equipment and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0124] Example 1-1 is in Figure 1A to Figure 1D The catalyst is MLC-500 produced by Sinopec Qilu Catalyst Factory, and its properties are listed in Table 1.

[0125] Take Daqing wax oil feed rate of 10 kg / hour as an example, the circulation rate of catalyst is 60 kg / hour, the flow rate of water vapor is 600 g / hour, the feed temperature of raw oil is 300℃, the sedimentation The operating pressure for the top and regenerator top is 150 kPa (gauge).

[0126] Such as Figure 1A As shown, the regeneration air 48 enters from the bottom of the regenerator 10 to contact with the catalyst to be burnt and regenerated, and the charred regenerant is drawn from the inclined pipe 11 drawn from the bottom of the regenerator 10 to enter the regenerant stripping agent through the pneumatic switch valve 12 13, the stripping steam 32 continuously enters the regenerant stripper 13 to blow off flue gas and oxygen to the regenerator 10, and the regenerant that basically blows off oxygen is drawn ...

Embodiment 2-1

[0136] This embodiment is carried out with the catalytic cracking operation mode of prolific liquid product, take Daqing wax oil feed rate as the medium-sized device of 60 kg / hour as example, the circulation rate of catalyst is 360 kg / hour, the feed temperature of raw material is 300 °C, the operating pressure at the top of the settler and the top of the regenerator is 150 kPa (gauge pressure), and the outlet temperature of the riser reactor is 495 °C. The properties of Daqing wax oil raw materials are listed in Table 2, and the catalyst is MLC-500 produced by Sinopec Qilu Catalyst Factory, and the properties are listed in Table 1. The specific reaction conditions of this embodiment are shown in Table 2-1, and the specific reaction results are shown in Table 2-2.

[0137]As shown in Figure 1, the temperature of the regenerated agent that is regenerated in the coking section 510 of the regenerator of the catalytic cracking unit is 680 ° C, and enters the regenerated agent strip...

Embodiment 2-2

[0140] This embodiment is carried out with the catalytic cracking operation mode of low-carbon olefin products. Taking Daqing wax oil feed rate as a medium-sized device of 60 kg / hour as an example, the circulation rate of the catalyst is 720 kg / hour, and the catalyst-oil ratio of the reaction is 12 , the feed temperature of the raw material is 280°C, the operating pressure of the settler top and the regenerator top is 150 kPa (gauge pressure), and the outlet temperature of the riser reactor is 560°C. The properties of Daqing wax oil raw materials are listed in Table 2, and the catalyst is CRP-1 produced by Sinopec Qilu Catalyst Factory, and the properties are listed in Table 1. The specific reaction conditions of this embodiment are shown in Table 2-1, the specific reaction results are shown in Table 2-2, and the properties of gasoline products are shown in Table 2-3.

[0141] As shown in Figure 1, the temperature of the regenerated agent after completion of regeneration in th...

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Abstract

The invention relates to catalytic reaction equipment and a method. The equipment comprises a tubular reactor, an agent feeder for increasing the pressure of a catalyst material fed into the tubular reactor, a regenerator and an oil-agent separation device, wherein the tubular reactor is sequentially provided with a catalyst storage section, a catalyst acceleration section, a catalyst ejection section, an oil-agent contact section and a reaction section according to the flowing direction of reaction materials, the sections form fluid communication, and the inner diameter of the catalyst acceleration section is smaller than the inner diameters of the catalyst storage section and the oil-agent contact section. According to the invention, with the catalytic reaction equipment and the method,the regenerated catalyst can be pressurized through the agent feeder, the pressurized regenerated catalyst is fed into the acceleration section of the tubular reactor so as to be accelerated, and finally the catalyst is sprayed out of the catalyst ejection section, so that the oil-agent mixing time in the oil-agent contact section is shortened, the oil-agent contact efficiency is improved, and theoccurrence of side reactions is reduced.

Description

technical field [0001] The invention relates to a catalytic reaction device and method. Background technique [0002] The pre-lift section of the catalytic cracking riser reactor is a device that pre-accelerates the regenerant from the regenerator slide valve upward along the riser. Since the pressure balance of the catalytic cracking unit is realized by the density and pressure difference of the catalyst, the pre-lift section The pressure difference from the lower part to the upper part is very small, and the linear velocity that can be realized in the pre-lift section is 0.5-2.0 m / s, which is very different from the gas velocity of 10-25 m / s in the reaction section of the riser. The raw material and the regenerant are contacted and gasified, and then continue to promote the catalyst to accelerate the catalyst. After the catalyst is mixed with the stripping gas, it exists in the state of large bubbles, and the back-mixing is serious. It is difficult to mix the injected raw ...

Claims

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Application Information

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IPC IPC(8): B01J8/08B01J8/12C10G11/00
CPCB01J8/004B01J8/005B01J8/08B01J8/12C10G11/00
Inventor 于敬川毛安国刘宪龙
Owner CHINA PETROLEUM & CHEM CORP