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CN-121988120-A - Gas-solid separation device for catalytic cracking hydrogen production and carbon material co-production process

CN121988120ACN 121988120 ACN121988120 ACN 121988120ACN-121988120-A

Abstract

The invention discloses a gas-solid separation device for a catalytic cracking hydrogen production and carbon material co-production process, which relates to the technical field of catalytic cracking auxiliary separation and comprises a DCS control system, a cyclone separator and a metal film filter, wherein the cyclone separator is connected with a mixed flue gas feeding pipe, the metal film filter is respectively connected with a tail gas emission component and a tail gas blowback component, the cyclone separator is connected with the metal film filter through an exhaust pipe, a temporary storage bin, a material bin and a discharging pipe are sequentially fixed at the lower end of the cyclone separator and the lower end of the metal film filter, a nitrogen replacement component is arranged on the material bin, and the DCS control system is used for respectively controlling the opening and closing of the cyclone separator, the nitrogen replacement component, the tail gas emission component and the tail gas blowback component. The invention can realize the effective separation of three substances of metal-based catalyst particles, carbon materials and hydrogen-containing gas, and air can not enter in the separation process, thereby improving the safety and environmental protection.

Inventors

  • QIN LI
  • ZHOU HONG
  • HE YANGDONG
  • WU YAJIE
  • YANG HANJIE
  • CHEN LIANG

Assignees

  • 中国石油天然气股份有限公司

Dates

Publication Date
20260508
Application Date
20241105

Claims (10)

  1. 1. A gas-solid separation device for a catalytic cracking hydrogen production and carbon material co-production process is characterized by comprising a DCS control system, a cyclone separator (1) for separating a metal-based catalyst and a metal membrane filter (5) for separating hydrogen-containing gas and carbon materials, The upper end of the cyclone separator (1) is connected with a mixed flue gas feeding pipe (101), the upper end of the metal film filter (5) is respectively connected with a tail gas discharge assembly and a tail gas back-blowing assembly, and the upper end of the cyclone separator (1) is connected with the upper end of the metal film filter (5) through an exhaust pipe (102); the lower end of the cyclone separator (1) and the lower end of the metal film filter (5) are sequentially fixed with a temporary storage bin (2), a material bin (4) and a discharge pipe (103), the material bin (4) is provided with a material receiving state and a material discharging state which are mutually switched, the material bin (4) is provided with a nitrogen replacement component, and the nitrogen replacement component is used for replacing gas in the material bin (4) between the material discharging state and the material receiving state; the DCS control system is used for respectively controlling the opening and closing of the cyclone separator (1), the nitrogen replacement component, the tail gas emission component and the tail gas blowback component.
  2. 2. The gas-solid separation device for the catalytic cracking hydrogen production and carbon material co-production process according to claim 1, wherein the nitrogen gas replacement component comprises a nitrogen source, a replacement air inlet pipe (403) and a replacement air outlet pipe (404), an air inlet valve (405) is arranged on the replacement air inlet pipe (403), one end of the replacement air inlet pipe (403) is arranged on the upper portion of one side of the material bin (4), the other end of the replacement air inlet pipe (403) is connected with the nitrogen source, an air outlet valve (406) and an oxygen concentration detector are arranged on the replacement air outlet pipe (404), one end of the replacement air outlet pipe (404) is arranged on the lower portion of the other side of the material bin (4), the other end of the replacement air outlet pipe (404) is located outside the material bin (4), and the nitrogen gas replacement component stops replacement after the oxygen concentration detector detects that the oxygen content of gas is 0.
  3. 3. The gas-solid separation device for the catalytic cracking hydrogen production and carbon material co-production process according to claim 1, wherein a first discharging valve (401) is arranged between the temporary storage bin (2) and the material bin (4), a second discharging valve (402) is arranged between the material bin (4) and the discharging pipe (103), and the first discharging valve (401) and the second discharging valve (402) are connected with a DCS control system.
  4. 4. A gas-solid separation device for a catalytic cracking hydrogen production and carbon material co-production process according to claim 3 is characterized in that an upper material level meter (407) and a lower material level meter (408) for detecting the height of a material are respectively fixed on the upper part and the lower part of the material bin (4), the upper material level meter (407) and the lower material level meter (408) are connected with a DCS control system, and the DCS control system can control the opening and closing of a first discharging valve (401) and a second discharging valve (402) through the detection results of the upper material level meter (407) and the lower material level meter (408).
  5. 5. A gas-solid separation device for a catalytic cracking hydrogen production and carbon material co-production process is characterized in that the metal film filter (5) comprises a shell, an upper flower plate (7) and a lower flower plate (8) are respectively fixed at the upper part and the lower part in the shell, an air inlet chamber is formed between the upper flower plate (7) and the upper end of the shell, a plurality of corresponding through holes (702) are formed in the upper flower plate (7) and the lower flower plate (8), a metal film filter bag (9) is fixed between the corresponding through holes (702), a tail gas cylinder (6) penetrating through the upper flower plate (7) upwards and extending to the upper end of the shell is fixed at the middle part of the lower flower plate (8), tail gas holes (601) communicated with the inside of the shell are formed in the lower end of the tail gas cylinder (6), a connecting pipe and a tail gas back-blowing component are respectively connected to two sides of the air inlet chamber, and the tail gas discharging component is connected to the upper end of the tail gas cylinder (6).
  6. 6. A gas-solid separation device for co-production process of hydrogen and carbon material by catalytic cracking as claimed in claim 5, wherein a partition plate (701) for partitioning the metal film filter bag (9) into a plurality of filtering areas is arranged between the upper and lower pattern plates (7, 8).
  7. 7. A gas-solid separation device for a co-production process of hydrogen and carbon materials by catalytic cracking as claimed in claim 6, wherein the partition plate (701) has a cross-shaped structure, and the partition plate (701) uniformly partitions the metal film filter bag (9) into four filtering areas.
  8. 8. A gas-solid separation device for a catalytic cracking hydrogen production and carbon material co-production process according to claim 6 or 7 is characterized in that the tail gas emission component comprises a tail gas pipe (501) and a tail gas fan (3), the tail gas pipe (501) is communicated with a tail gas cylinder (6), the tail gas fan (3) is arranged on the tail gas pipe (501), the tail gas back-blowing component comprises a back-blowing fan (10) and a back-blowing pipe (502), one end of the back-blowing pipe (502) is connected to the tail gas pipe (501) at the output end of the tail gas fan (3), and the other end of the back-blowing pipe is communicated with an air inlet chamber.
  9. 9. The gas-solid separation device for the co-production process of hydrogen and carbon materials by catalytic pyrolysis according to claim 8, wherein the back-blowing pipe (502) is provided with a plurality of back-blowing heads, the back-blowing heads are respectively arranged above the filtering areas, and the back-blowing heads are used for back-blowing the filtering areas in a wheel flow manner.
  10. 10. The gas-solid separation device for the catalytic cracking hydrogen production and carbon material co-production process according to claim 1, wherein the mixed flue gas feeding pipe (101) is a jacket pipe, cooling water is arranged in the jacket, a flowmeter connected with a DCS control system is arranged in the jacket, and the DCS control system can control the flow of the cooling water according to the detection result of the flowmeter.

Description

Gas-solid separation device for catalytic cracking hydrogen production and carbon material co-production process Technical Field The invention relates to the technical field of catalytic cracking auxiliary separation, in particular to a gas-solid separation device for catalytic cracking hydrogen production and carbon material co-production processes. Background In the carbon neutralization background, the hydrogen has high attention due to the characteristics of cleanliness, low carbon, high energy, sustainability and the like. Currently, 96% of the total world hydrogen production comes from fossil energy-based production, which generates large amounts of CO 2 during the production process. For low hydrocarbon production, hydrocarbon catalytic pyrolysis is considered a potential, low cost production process, with CO 2 free of product and CO-produced with high value carbon materials. In the aspect of high-value carbon materials, the high-value carbon materials such as carbon nanotubes, graphene, conductive carbon black and the like are widely applied to the fields of electronic information, new energy, aerospace, flexible electronics and the like, can greatly promote the rapid development, upgrading and updating of related industries, and has a huge market prospect. Thus, the catalytic cracking hydrogen production and carbon material co-production preparation technology is receiving a great deal of attention. In the production process of the equipment for producing hydrogen and carbon materials by catalytic pyrolysis, if the produced carbon materials are not timely collected, any carbon materials float on the surface of a metal-based catalyst medium, adverse effects on subsequent reactions are generated, and after a period of production, the reactor is required to be stopped and opened for collecting the carbon materials, so that the production efficiency is influenced, and potential safety hazards of safety production are also caused. At present, research on metal-based catalyst catalytic cracking hydrogen production, carbon material co-production and auxiliary production technology thereof is still in a test exploration stage in China, and related application is limited to pilot scale. In order to better realize separation of hydrogen-containing gas and carbon materials, related technologies such as carbon discharging equipment used by a natural gas hydrogen production device with molten medium disclosed in patent document with publication number of CN115212653A, a novel process for preparing hydrogen and carbon nanotubes by catalytic pyrolysis with molten salt method disclosed in patent document with publication number of CN116924394A, a carbon discharging mechanism used by a methane hydrogen production device with liquid metal pyrolysis disclosed in patent document with publication number of CN112938895A and the like are also proposed in the prior art, but the above technologies only consider collection of carbon materials, on one hand, the carbon materials and metal-based catalysts cannot be collected separately at the same time, not only causes catalyst loss (increases running cost), but also affects purity of the carbon materials. On the other hand, when the carbon material is discharged, air can enter the device through the carbon storage tank or the carbon discharge cavity or the material containing box, and when the air enters the device, the oxygen in the air and the combustible gas in the device are mixed to have explosion risks, so that potential safety hazards exist. In summary, the gas-solid separation technology of the current catalytic cracking hydrogen production and carbon material co-production process is still in an early experimental exploration stage, so that the development of a new technology is particularly important to fill the domestic blank. Disclosure of Invention Aiming at the technical problems that the existing catalytic cracking hydrogen production and carbon material co-production collection process cannot realize continuous production or cannot realize the separation of volatile metal-based catalyst and carbon material to cause catalyst loss (increase of running cost), impure carbon material and influence on downstream application and subsequent treatment cost and possibly air entering into a device, the invention designs and provides a gas-solid separation device for the catalytic cracking hydrogen production and carbon material co-production process. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a gas-solid separation device for a catalytic cracking hydrogen production and carbon material co-production process comprises a DCS control system, a cyclone separator for separating a metal-based catalyst and a metal membrane filter for separating hydrogen-containing gas and carbon materials, wherein, The upper end of the cyclone separator is connected with a mixed flue gas feeding pipe, the upper end of the metal film filte