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Combined catalyst cooler

A catalyst and reactor technology, which is applied in the field of catalyst heat extraction and temperature control in the reaction process of fluidized bed methanol to olefins and aromatic hydrocarbons, can solve the problems of increased energy consumption, high investment, complex engineering, etc.

Active Publication Date: 2016-08-24
石宝珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The regenerant carries flue gas, CO2, N2 and other non-condensable gases during transport to the reactor, which is unfavorable for the separation of ethylene and propylene and increases energy consumption. It is necessary to install a regenerant stripper
[0008] In the existing technology, the external heat extractor of the regenerator, the reaction regenerant stripper, the delivery of the regenerant and the distribution in the reactor are all set separately, requiring multiple sets of equipment, and the external heat extractor of the regenerator is only responsible for the regeneration process heat extraction, complex engineering, high investment, and inconvenient operation
[0009] Especially in the prior art, the high-temperature regenerant directly enters the reactor, which is unfavorable to the reaction

Method used

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Examples

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Effect test

Embodiment 1

[0042] For an ethylene plant with 1.8 million tons / year of methanol feed, the regenerator needs a heat load of 17MW, a reaction cycle catalyst of 80T / h; the regeneration temperature is 660°C, the reaction temperature is 495°C, and the cooling medium uses water at 190°C, yielding 4.0 MPa saturated steam. Combined regeneration agent heat extractor of the present invention is as follows:

[0043] Shell 11 inner diameter 2200mm; height 9000mm, catalyst inlet inner diameter 1200mm, heat exchange tube adopts inner and outer tube form, water inlet pipe 17 and 27 are arranged inside heat exchange tube 12 and 22; heat exchange tube 12 and 22 adopts Ф114 boiler tube, The water inlet pipe adopts Ф68 boiler tube, the heat exchange tube 12 of the regenerant heat-taking part covers an area of ​​70㎡, and the heat exchange tube 22 of the cooling part of the reaction cycle regenerant has an area of ​​15㎡; the shell 21 of the cooling part of the reaction cycle regenerant has an inner diameter o...

Embodiment 2

[0045] The conditions are the same as in Example 1. The external heat extractor adopts a steam-water separation structure

[0046] The inner diameter Ф1 of the water vapor separator shell 51 is 2200 mm, the total height is 4500 mm, the diameter Ф3 of the inner cylinder 52 is 2100 mm, the inner diameter Ф2 of the steering separator 53 is 1900 mm; the distance from the steering separator 53 to the coalescer 55 is 2000 mm, and 51A adopts the form of a spherical head , The fixed base plate 58 of the water inlet pipe is 1000mm away from the connection between the 51A and the housing 51; other parts are the same as in the first embodiment.

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Abstract

The invention relates to a combined catalyst cooler. Regenerator heat taking, temperature control on circulation regeneration agents entering a reactor, and reaction circulation catalyst steam extraction are combined into a whole; meanwhile, control on regenerator temperature, the temperature of a catalyst entering the reactor, and the gas carrying of the catalyst entering the reactor is realized.

Description

technical field [0001] The invention relates to a device for taking heat from the regenerator and controlling the temperature of the circulating regenerant entering the reactor in the fluidized bed methanol-to-hydrocarbon technology, especially suitable for catalyst extraction in the reaction process of fluidized-bed methanol-to-olefins and aromatics Heat and temperature control. Background technique [0002] The production of olefins or aromatics from methanol is an important process technology of coal chemical industry, which has been highly valued by various countries. The reaction of methanol to olefins or aromatics often adopts fluidized bed reaction and continuous regeneration of catalyst fluidized bed. The catalyst regeneration and reaction process are exothermic reactions; in order to maintain the skeleton structure and activity of the catalyst, it is necessary to set up a heat collector to control the temperature of the regenerant In the range of 650°C to 700°C. E...

Claims

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Application Information

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IPC IPC(8): B01J38/00
CPCB01J38/00
Inventor 石宝珍
Owner 石宝珍