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On-line sampling system and method for aromatization process

A sampling system and aromatization technology, applied in the direction of sampling device, test sample preparation, etc., can solve the problems of inability to respond to the operation of aromatization industrial devices in time, inaccurate sampling, etc., and achieve low cost and repeatability Good, simple operation effect

Active Publication Date: 2014-07-02
HUADIAN COAL IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the aromatization technology uses a fluidized bed reactor, catalyst particles are often entrained in the process materials taken out. At the same time, the product will be divided into three phases: gas phase, water phase and oil phase after cooling. " and other problems will cause inaccurate sampling and cannot reflect the operation of the aromatization industrial device in a timely manner

Method used

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  • On-line sampling system and method for aromatization process
  • On-line sampling system and method for aromatization process
  • On-line sampling system and method for aromatization process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Turn on the heating system of the introduction device a1 and the steam heating of the gas-solid separation tank 5, maintain the temperature of the gas-solid separation device a2 and the introduction device a1 at 150°C, and turn on the cooling liquid circulation refrigerator 11 to maintain the cooling device a3 at 5°C. At the same time, the gas-solid separation tank 5 is purged with nitrogen to remove the catalyst remaining in the gas-solid separation tank 5 .

[0053] The product of methanol aromatization is introduced into the online sampling system through the introduction device a1, the shut-off valve at the inlet of the gas-solid separation tank 5 is opened, and the material enters the gas-solid separation tank 5 to remove the catalyst particles entrained in the material. Then enter the cooling device a3 to cool to about 5°C, enter the gas-liquid separation device a4 and separate into gas phase and liquid phase, the liquid phase product stays in the separation device...

Embodiment 2

[0061] Turn on the heating system of the introduction device a1 and the steam heating of the gas-solid separation tank 5, maintain the temperature of the gas-solid separation device a2 and the introduction device a1 at 150°C, and turn on the cooling liquid circulation refrigerator 11 to maintain the cooling device a3 at 5°C. At the same time, the gas-solid separation tank 5 is purged with nitrogen to remove the catalyst remaining in the gas-solid separation tank 5 .

[0062] The aromatized product of mixed light hydrocarbons is introduced into the online sampling system through the introduction device a1, the shut-off valve at the inlet of the gas-solid separation tank 5 is opened, and the material enters the gas-solid separation tank 5 to remove the catalyst particles entrained in the material. Then enter the cooling device a3 to cool to about 5°C, enter the gas-liquid separation device a4 and separate into gas phase and liquid phase, the liquid phase product stays in the sepa...

Embodiment 3

[0070] Turn on the heating system of the introduction device a1 and the steam heating of the gas-solid separation tank 5, maintain the temperature of the gas-solid separation device a2 and the introduction device a1 at 150°C, and turn on the cooling liquid circulation refrigerator 11 to maintain the cooling device a3 at 5°C. At the same time, the gas-solid separation tank 5 is purged with nitrogen to remove the catalyst remaining in the gas-solid separation tank 5 .

[0071] The propane aromatization product is introduced into the online sampling system through the introduction device a1, the shut-off valve at the inlet of the gas-solid separation tank 5 is opened, and the material enters the gas-solid separation tank 5 to remove the catalyst particles entrained in the material. Then enter the cooling device a3 to cool to about 5°C, enter the gas-liquid separation device a4 and separate into gas phase and liquid phase, the liquid phase product stays in the separation device tan...

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Abstract

The invention belongs to the technical field of aromatization industrialization devices and methods, and in particular relates to an on-line sampling system and method for an aromatization process. The on-line sampling system disclosed by the invention consists of an introduction device, a gas-solid separation device, a cooling device, a gas-liquid separation device, a gas-phase product dewatering and drying device, a gas-phase metering device, a gas-phase sampling device, a liquid-phase sampling device and a tail gas absorption device. The method comprises the following steps of introducing a preheated material into the on-line sampling system, removing a catalyst through the gas-solid separation device, cooling the material through the product cooling device, performing phase division through the gas-liquid separation device, enabling a gas-phase product to flow out from the top, performing dewatering and drying, and metering and collecting a gas sample for analysis; and collecting a liquid-phase product at the bottom of the gas-liquid separation device so as to perform liquid division weighing. The method disclosed by the invention can precisely quantify gas phase, oil phase and water phase of an aromatization system product, so that the environment friendliness and the safety of the sampling device are fully considered; the on-line sampling system is simple in structure, convenient to use and extremely high in operability.

Description

technical field [0001] The invention belongs to the technical field of aromatization industrialization devices and methods, in particular to an on-line sampling system and method for aromatization process. Background technique [0002] Methanol and dimethyl ether aromatization technology is an emerging aromatics production process. It uses methanol or dimethyl ether as a raw material and reacts on a metal-molecular sieve dual-function catalyst to generate benzene, toluene, xylene, trimethylbenzene, etc. Aromatic process. [0003] In an aromatization industrialized device, it is often necessary to use an online sampling device to sample gas and liquid samples. However, since the aromatization technology uses a fluidized bed reactor, catalyst particles are often entrained in the process materials taken out. At the same time, the product will be divided into three phases: gas phase, water phase and oil phase after cooling. "And other problems will cause inaccurate sampling, a...

Claims

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Application Information

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IPC IPC(8): G01N1/10G01N1/28
Inventor 惠兴育黄晓凡崔宇何旭东汤效平柴鹏飞王彤韩振兴高长平郭子殿梁彦鸿丁焕德
Owner HUADIAN COAL IND GRP