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CN-224203768-U - Catalytic cracking flue gas conveying device

CN224203768UCN 224203768 UCN224203768 UCN 224203768UCN-224203768-U

Abstract

The utility model relates to the technical field of chemical industry and discloses a catalytic cracking flue gas conveying device which comprises a conveying pipe group, a main pipe and a test board, wherein the conveying pipe group is used for providing catalytic cracking flue gas for external energy recovery equipment, the main pipe is connected to the conveying pipe group, the test board is arranged in the main pipe and is used for simulating blades of a flue gas turbine, and the main pipe is connected to the conveying pipe group to receive the catalytic cracking flue gas and is flushed to the test board. According to the utility model, the main body pipe is used as experimental test smoke through leading out part of catalytic cracking smoke which is led into the energy recovery equipment in the transmission pipe group, so that the problem that the existing test device cannot reduce the smoke flowing in the gas-solid two phases in the smoke turbine is solved, and the accuracy of experimental data is improved.

Inventors

  • XU MINGDE
  • WANG JIANJUN
  • LIU YUQING
  • GUO YING
  • WANG YIFAN

Assignees

  • 中国石油化工股份有限公司
  • 中石化石油化工科学研究院有限公司

Dates

Publication Date
20260505
Application Date
20250428

Claims (10)

  1. 1. The utility model provides a catalytic cracking flue gas conveyor, its characterized in that includes transmission nest of tubes (3) that are used for providing catalytic cracking flue gas to outside energy recuperation equipment, connect in main pipe (4) on transmission nest of tubes (3) and set up test board (5) in main pipe (4), test board (5) are used for simulating the blade of flue gas turbine, main pipe (4) connect in transmission nest of tubes (3) in order to receive catalytic cracking flue gas, and wash onto test board (5).
  2. 2. The catalytic cracking flue gas conveying device according to claim 1, characterized in that the device further comprises a first separator (1) and a second separator (2) connected to the first separator (1), both the first separator (1) and the second separator (2) being connected to the energy recovery apparatus by means of the transfer tube bank (3); Wherein the second separator (2) is arranged to be able to split a sub-stream of catalytically cracked flue gas from within the first separator (1), and the main pipe (4) is arranged to receive flue gas output from the second separator (2).
  3. 3. The catalytic cracking flue gas conveying device according to claim 1, wherein a nozzle (6) is arranged in the main body pipe (4), and the nozzle (6) can accelerate catalytic cracking flue gas flushed onto the test plate (5) in the main body pipe (4).
  4. 4. A catalytic cracking flue gas conveying apparatus according to claim 3, wherein the outer peripheral surface of the nozzle (6) is sealingly connected to the inner peripheral surface of the main body tube (4).
  5. 5. A catalytic cracking flue gas conveying device according to claim 3, wherein the nozzles (6) have holes (601) with inner diameters decreasing in the direction of the gas flow.
  6. 6. The catalytic cracking flue gas conveying device according to claim 5, wherein the nozzle (6) comprises a wear resistant lining plate (602), the wear resistant lining plate (602) being provided with the holes (601).
  7. 7. The catalytic cracking flue gas conveying device according to claim 6, wherein the nozzle (6) comprises a baffle plate (603) located upstream of the wear-resistant lining plate (602) and a fixing plate (604) located downstream of the wear-resistant lining plate (602), and the baffle plate (603) and the fixing plate (604) are respectively attached to two side surfaces of the wear-resistant lining plate (602).
  8. 8. The catalytic cracking flue gas conveying device according to claim 7, wherein a fixing ring (7) is arranged in the main body pipe (4) downstream of the wear-resistant lining plate (602), and the test plate (5) is connected to the fixing ring (7).
  9. 9. The catalytic cracking flue gas conveying device according to claim 1, wherein the main body tube (4) is detachably connected to the transfer tube group (3).
  10. 10. The catalytic cracking flue gas conveying device according to claim 1, wherein the main body pipe (4) is provided with a pressure relief hole (401), a temperature measurement hole (402) and a pressure measurement hole (403).

Description

Catalytic cracking flue gas conveying device Technical Field The utility model relates to the technical field of chemical industry, in particular to a catalytic cracking flue gas conveying device. Background Catalytic cracking is a core process in the oil refining industry, and as the treatment capacity of a device increases, the flue gas amount of a regenerator exceeds 5000Nm 3/min, and the flue gas temperature is in the range of 600-700 ℃. In order to recover the energy of the part of high-temperature flue gas, a flue gas turbine is generally adopted for energy conversion, and the technology has remarkable economic benefits. In industrial production, the long-period stable operation of the flue gas turbine is a key for guaranteeing economic benefits. However, in actual operation, it was found that catalyst fines entrained in high temperature flue gas continuously scour the rotor blades, which resulted in the gradual formation of a fouling layer on the blade surfaces. When the scale is accumulated to a certain extent, the dynamic balance of the rotor is offset, the vibration is triggered to exceed the standard, the machine set is forced to stop, and the continuous operation of the energy recovery system is seriously affected. At present, the scaling mechanism of catalyst fine powder in a flue gas turbine caused by the variable working condition of the catalytic cracking process is not completely defined. The existing simulation test device can partially simulate the scaling process, but can not accurately reproduce the real gas-solid two-phase flow state in the flue gas turbine, so that the experimental result has deviation, and effective guidance is difficult to provide for actual operation. Disclosure of utility model The utility model aims to overcome the defect that the existing testing device in the prior art cannot reduce the gas-solid two-phase flowing smoke in the smoke turbine. In order to achieve the above object, the present utility model provides a transporting device for catalytic cracking flue gas, comprising a transporting pipe group for supplying catalytic cracking flue gas to an external energy recovery device, a main body pipe connected to the transporting pipe group, and a test plate provided in the main body pipe, the test plate being for simulating blades of a flue gas turbine, the main body pipe being connected to the transporting pipe group to receive catalytic cracking flue gas and being flushed onto the test plate. Optionally, the device further comprises a first separator and a second separator connected to the first separator, wherein the first separator and the second separator are both connected to the energy recovery device through a transmission pipe group; Wherein the second separator is arranged to be able to split a sub-stream of catalytically cracked flue gas from within the first separator, and the main pipe is arranged to receive the flue gas output from the second separator. Optionally, a nozzle is disposed in the main tube, and the nozzle can accelerate the catalytic cracking flue gas in the main tube to wash onto the test plate. Alternatively, the outer peripheral surface of the nozzle is sealingly connected with the inner peripheral surface of the main body tube. Optionally, the nozzle has an orifice with an inner diameter that tapers in the direction of the gas flow. Optionally, the nozzle comprises a wear-resistant liner plate with holes. Optionally, the nozzle comprises a baffle plate positioned at the upstream of the wear-resistant lining plate and a fixed plate positioned at the downstream of the wear-resistant lining plate, and the baffle plate and the fixed plate are respectively attached to the two side surfaces of the wear-resistant lining plate. Optionally, a fixing ring is arranged in the main body pipe at the downstream of the wear-resistant lining plate, and the test plate is connected to the fixing ring. Optionally, the main body tube is detachably connected to the transfer tube set. Optionally, a pressure relief hole, a temperature measurement hole and a pressure measurement hole are arranged on the main body pipe. According to the technical scheme, the main pipe of the utility model takes the catalytic cracking flue gas which is led to the energy recovery equipment in a part of the split transmission pipe group as experimental test flue gas, so that the problem that the existing test device cannot reduce the gas-solid two-phase flowing flue gas in the flue gas turbine is solved, and the accuracy of experimental data is improved. Drawings FIG. 1 is a schematic diagram of the flue gas scale simulation mechanism of the present utility model; FIG. 2 is a schematic structural view of a test part according to the present utility model; FIG. 3 is a schematic view of the structure of the nozzle of the present utility model; FIG. 4 is a schematic diagram of the structure of the test plate and the retaining ring of the present utility model. Description of the