Regeneration device, device for preparing low-carbon olefins, and use thereof

Patent metadata

Field	Value
Publication number	US-12296324-B2
Application number	US-202017802543-A
Country	US
Kind code	B2
Filing date	Oct 16, 2020
Priority date	Oct 16, 2020
Publication date	May 13, 2025
Grant date	May 13, 2025

Abstract

A regeneration device, a device for preparing low-carbon olefins, and a use thereof are provided. The regeneration device includes a first regenerator and a second regenerator; a first activation zone of the first regenerator is connected to the second regenerator through a pipeline, such that a catalyst in the first activation zone is able to be delivered to the second regenerator; and the second regenerator is connected to a gas-solid separation zone of the first regenerator through a pipeline, such that a catalyst in the second regenerator is able to be delivered to the gas-solid separation zone. The regeneration device can adjust the coke content, coke content distribution, and coke species in a dimethyl ether/methanol to olefins (DMTO) catalyst to control an operation window of the DMTO catalyst, which improves the selectivity for low-carbon olefins and the atomic economy of a methanol-to-olefins (MTO) technology.

First claim

What is claimed is:

1. A regeneration device for activating a catalyst to prepare low-carbon olefins from an oxygen-containing compound, wherein the regeneration device comprises a first regenerator and a second regenerator;
the first regenerator comprises a second activation zone, a first activation zone, and a gas-solid separation zone from bottom to top;
the second activation zone axially communicates with the gas-solid separation zone;
the first activation zone is arranged on a periphery of a junction between the second activation zone and the gas-solid separation zone, and the first activation zone communicates with the second activation zone;
the first activation zone is an annular cavity;
n baffles are radially arranged in the first activation zone, and the n baffles divide the first activation zone into n first activation zone subzones;
a catalyst circulation hole is formed in each of n−1 of the n baffles, such that a catalyst entering the first activation zone flows circularly;
the first activation zone of the first regenerator is connected to the second regenerator through a first pipeline, such that the catalyst in the first activation zone is configured to be delivered to the second regenerator; and
the second regenerator is connected to the gas-solid separation zone of the first regenerator through a second pipeline, such that the catalyst in the second regenerator is configured to be delivered to the gas-solid separation zone.

2. The regeneration device according to claim 1 , wherein the regeneration device comprises a second regenerated catalyst inclined pipe, a second regenerated catalyst delivery pipe, and a third regenerated catalyst inclined pipe;
the first activation zone of the first regenerator, the second regenerated catalyst inclined pipe, the second regenerated catalyst delivery pipe, and a middle part of the second regenerator communicate with each other in sequence; and
a bottom of the second regenerator, the third regenerated catalyst inclined pipe, and the gas-solid separation zone of the first regenerator communicate with each other in sequence.

3. The regeneration device according to claim 1 , wherein in the first activation zone, the n baffles comprise a 1 st baffle, and a 2 nd baffle to an n th baffle;
no catalyst circulation hole is formed in the 1 st baffle;
the catalyst circulation hole is formed in each of the 2 nd baffle to the n th baffle;
a spent catalyst inlet is formed in a 1 st first activation zone subzone formed through division by the 1 st baffle and the 2 nd baffle;
an n th first activation zone subzone formed through division by the 1 st baffle and the n th baffle is provided with a first activation zone catalyst delivery pipe, and the first activation zone catalyst delivery pipe allows the first activation zone to communicate with the second activation zone;
a first activation zone distributor is arranged at a bottom of each of the n first activation zone subzones;
a first activation zone gas delivery pipe is arranged at tops of the n first activation zone subzones;
a gas-solid separation unit of the first regenerator is arranged in the gas-solid separation zone; and
the gas-solid separation unit of the first regenerator communicates with the first activation zone through the spent catalyst inlet.

4. The regeneration device according to claim 1 , wherein n has a value range of 2≤n≤10.

5. The regeneration device according to claim 1 , wherein a cross section of each of the n first activation zone subzones is sector-annular.

6. The regeneration device according to claim 1 , wherein m perforated plates are horizontally arranged in the second activation zone,
wherein 1≤m≤10;
wherein the m perforated plates each have a porosity of 5% to 50%;
wherein a second activation zone distributor is arranged at a bottom of the second activation zone.

7. The regeneration device according to claim 1 , wherein the first regenerator comprises a first regenerator gas collection chamber and a first regenerator cooler;
the first regenerator gas collection chamber is located at a top of the first regenerator;
a top of the first regenerator gas collection chamber is provided with a first regenerator product gas delivery pipe;
the gas-solid separation zone is provided with a gas-solid separation unit of the first regenerator;
the first regenerator gas collection chamber is connected to a gas outlet of the gas-solid separation unit of the first regenerator;
the first regenerator cooler is located in a lower part of the second activation zone;
the second regenerator comprises a second regenerator shell, a second regenerator distributor, a second regenerator gas-solid separation unit, and a second regenerator gas collection chamber;
the second regenerator distributor is located at a bottom of the second regenerator;
the second regenerator gas-solid separation unit is located at an upper part of the second regenerator;
the second regenerator gas collection chamber is located at a top of the second regenerator;
a gas outlet of the second regenerator gas-solid separation unit is connected to the second regenerator gas collection chamber; and a catalyst outlet of the second regenerator gas-solid separation unit is located at a lower part of the second regenerator.

8. A device for preparing low-carbon olefins from an oxygen-containing compound, comprising a fluidized bed reactor and the regeneration device according to claim 1 ;
wherein the device comprises a spent catalyst inclined pipe, a fluidized bed reactor stripper, a spent catalyst delivery pipe, a first regenerated catalyst inclined pipe, and a first regenerated catalyst delivery pipe;
a spent catalyst zone, the spent catalyst inclined pipe, the fluidized bed reactor stripper, the spent catalyst delivery pipe, and a gas-solid separation unit of the first regenerator communicate with each other in sequence; and
the second activation zone, the first regenerated catalyst inclined pipe, the first regenerated catalyst delivery pipe, and a reaction zone of the fluidized bed reactor communicate with each other in sequence.

9. The device according to claim 8 , wherein the fluidized bed reactor comprises a lower shell, a delivery pipe, and an upper shell;
the lower shell encloses the reaction zone;
the delivery pipe is located above the reaction zone and communicates with the reaction zone;
the upper shell is arranged on a periphery of the delivery pipe;
the upper shell and the delivery pipe enclose a cavity;
the cavity is divided into the spent catalyst zone and a gas-solid separation zone from bottom to top;
the reaction zone is in a fast fluidization regime;
the spent catalyst zone is in a bubbling fluidization regime;
the gas-solid separation zone of the fluidized bed reactor is provided with a first gas-solid separation unit of the fluidized bed reactor;
an upper part of the delivery pipe is connected to an inlet of the first gas-solid separation unit of the fluidized bed reactor;
the fluidized bed reactor comprises a fluidized bed reactor distributor, a fluidized bed reactor cooler, a spent catalyst zone gas distributor, a fluidized bed reactor gas collection chamber, and a second gas-solid separation unit of the fluidized bed reactor;
the fluidized bed reactor distributor is located at a bottom of the reaction zone;
the fluidized bed reactor cooler is located in a lower part of the spent catalyst zone;
the spent catalyst zone gas distributor is located at a bottom of the spent catalyst zone;
gas outlets of the second gas-solid separation unit of the fluidized bed reactor and the first gas-solid separation unit of the fluidized bed reactor are connected to the fluidized bed reactor gas col

Assignees

• Dalian Inst Chem & Physics Cas

Inventors

• Zhang Tao
• Ye Mao
• Zhang Jinling
• Xu Shuliang
• Tang Hailong
• Wang Xiangao
• Zhang Cheng
• Jia Jinming
• Wang Jing
• Li Hua
• Li Chenggong
• Liu Zhongmin

Classifications

• B01J38/22

  Moving bed, e.g. vertically or horizontally moving bulk · CPC title

• B01J38/12

  Treating with free oxygen-containing gas · CPC title

• B01J38/30

  in gaseous suspension, e.g. fluidised bed · CPC title

• B01J8/26

  with two or more fluidised beds, e.g. reactor and regeneration installations · CPC title

• C07C2529/85

  Silicoaluminophosphates (SAPO compounds) · CPC title