Horizontal type agitated bed reactor inner caking detection method and apparatus

A technology of a horizontal stirred bed and a detection method, which is applied to measuring devices, chemical/physical/physicochemical stationary reactors, vibration measurement in fluids, etc., can solve the problems of unsatisfactory detection sensitivity and complexity, and meet the measurement conditions The effect of low requirements, small measurement error and wide application

Inactive Publication Date: 2008-08-13
SINOPEC YANGZI PETROCHEM
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  • Claims
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Problems solved by technology

The above methods are more complicated to implement, and the detection sensitivity is not ideal enough.

Method used

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  • Horizontal type agitated bed reactor inner caking detection method and apparatus
  • Horizontal type agitated bed reactor inner caking detection method and apparatus
  • Horizontal type agitated bed reactor inner caking detection method and apparatus

Examples

Experimental program
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Effect test

Embodiment 1

[0045] The cold mold device of the horizontal stirred bed reactor is built in the laboratory, such as figure 2 shown. The reactor is made of transparent plexiglass, with a length of 1530mm and an inner diameter of 475mm. The stirring paddle is blade-type, made of stainless steel, and the rotation speed is 30rpm. The acoustic emission signal is measured with an acoustic wave measuring instrument. The acoustic wave measuring instrument includes an acoustic wave receiving device, an amplifying device, a signal collecting device and a signal processing device. The acoustic sensor is placed at the bottom of the tank, the sampling frequency is 10000 Hz, the sampling time is 10 s, and the sampling interval is 1 min. The powder used in the experiment is linear low-density polyethylene particles (LLDPE, produced by Sinopec Tianjin Branch), and its melt index and density are 2.0g / 10min and 920kg / m3 respectively. 3 , the average particle size is 833 μm, and the particle size distribut...

Embodiment 2

[0053] The agglomeration detection in a horizontal reactor was carried out on an industrial grade polypropylene device in a factory by using acoustic emission technology. The length of the reactor is 13700mm, the inner diameter is 2743mm, the material is stainless steel, and the rotation speed of the stirring blade is 15r / min. Acoustic emission signals are measured by acoustic wave measuring instruments, which include acoustic wave receiving devices, amplifiers, signal acquisition devices and signal processing devices, with a sampling frequency of 1MHz, a sampling time of 10s, and a monitoring interval of 12 minutes.

[0054] According to the quality of the powder at the discharge port and the corresponding parameters (T, P) of the reactor, it is judged whether the reactor is in a normal production state, and the acoustic emission signal is collected at the same time to obtain the ARMA power spectrum model of the acoustic emission signal of the reactor in the normal state.

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Abstract

The invention relates to a horizontal stirred-bed reactor caking detection method and device which belongs to reactor caking detection. The method comprises the steps, collecting ultrasound signals firstly, and then judging the ultrasonic signals, judging whether caking last. The device comprises signal processing devices and at least one ultrasound emission signal receiving device; ultrasound emission signals caused by reactor internal particle impacting the reactor container wall are transformed into electrical signals by the ultrasound emission signal receiving device, the electrical signals are introduced into a input end of the signal receiving device after transformed by A/D converter. The signal amplifier is connected to the output end of the ultrasound emission signal receiving device, the amplifier output is connected by the A/D converter to the output end of the signal processing device. The invention is easy and convenient to install, and multiphase fluid movement in the device or internal chemical reaction is not affected; does not require emission source, security and environmental protection; has low measurement requirement; and rapid response, small measurement error, a wide applicability.

Description

technical field [0001] The invention relates to the detection of agglomeration in a reactor, in particular to a detection method and device for agglomeration in a horizontal stirred bed reactor. Background technique [0002] The horizontal stirred bed reactor (horizontal stirred bed reactor-HSBR) is a relatively advanced gas-phase polypropylene production equipment invented by Amoco. The production process using this equipment is to add a fresh catalyst (usually the fourth-generation Zigeler-Natta catalyst with titanium as the active component) at one end of the reactor, and react with propylene monomer in the gas phase, with an active solid bed Under the "soft" agitation of the horizontal stirring paddle, the layer moves slowly to the outlet of the reactor, and finally forms polypropylene particles that meet the production requirements at the outlet. To be precise, the impeller has no conveying effect on the solid powder, because the horizontal blades have a forward or bac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H3/10G01B17/00B01J19/18
Inventor 钱建忠阳永荣殷大斌曹翌佳许造明王靖岱夏华刘伟翟建宏黄正梁
Owner SINOPEC YANGZI PETROCHEM
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