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Parallelly-distributed ultrasonic bubble column rectification device and method

An ultrasonic and bubble column technology is applied in the field of parallel distributed ultrasonic bubble column rectification devices, which can solve the problems of increased investment in device renovation and equipment investment, loss of economic benefits, increased start-up and parking costs, material consumption and energy consumption, etc. The effect of operation and management mode, prolonging service life and reducing labor intensity of production

Inactive Publication Date: 2018-09-07
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] All the above-mentioned measures must be carried out for plant shutdown and transformation, which not only greatly increases the investment in plant transformation and equipment investment, but also requires the plant to be shut down, increasing the cost of starting and stopping, material consumption and energy consumption, resulting in the loss of economic benefits

Method used

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  • Parallelly-distributed ultrasonic bubble column rectification device and method
  • Parallelly-distributed ultrasonic bubble column rectification device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A parallel distributed ultrasonic bubble column rectification device, such as figure 1 and figure 2 Shown, comprise bubble cap column, comprise a plurality of trays 7 and bubble cap 6 in the bubble cap column, also comprise supersonic generator 9, on the position corresponding to one of the trays 7 on the outer wall of bubble cap column, three distributors are set 3. Each distributor 3 is connected to the ultrasonic transducer 1, one distributor 3 corresponds to one ultrasonic transducer 1, the angle between the ultrasonic transducer 1 and the distributor 3 is 45°-135°, the ultrasonic transducer 1 is connected with ultrasonic generator 9 again. The connection mode between the ultrasonic transducer 1 and the ultrasonic generator 9 is welding or flange connection. A cooler 2 is provided between each distributor 3 and its corresponding ultrasonic transducer 1 . The distributor 3 is made of metal, and the outer surface of the distributor 3 is a curved structure.

[004...

Embodiment 2

[0048] The present invention is an implementation of parallel ultrasonic bubble cap towers in an 800kt / a heavy oil catalytic cracking unit.

[0049] In a refining heavy oil catalytic cracking unit, the dry point of diesel products in the first half of 2015 was 365°C, which can meet the national V standard (diesel standard 2 , the sparger is connected to the tray by welding, the test process uses an ultrasonic frequency of 20Khz, the angle between the transducer and the sparger is 90°, and the ultrasonic sound intensity is 0.24w / cm 2 .

[0050] The bubble column device without ultrasonic waves, the product in the bubble column: the distillation range dry point of diesel oil is 368°C, there are many heavy components in the product, and the efficiency of the bubble cap tray is not enough, so the product cannot meet the factory quality requirements (diesel oil dry point <365°C); under the same process conditions, the efficiency of the ultrasonic bubble-cap tray is increased, and t...

Embodiment 3

[0052] The present invention is an implementation of parallel ultrasonic bubble cap towers in a 1400kt / a heavy oil catalytic cracking unit.

[0053] For a heavy oil catalytic cracking unit in a refinery, the designed feed rate is 170 tons / hour. In the first half of 2016, the content of polycyclic aromatic hydrocarbons in diesel products was 10.5%. PAHs are an important type of environmental and food pollutants , a considerable part is carcinogenic, the national standard V diesel oil standard stipulates that the content of polycyclic aromatic hydrocarbons is less than 11%. In August 2016, the feed capacity of the device was increased by 15 tons per hour. The polycyclic aromatic hydrocarbons in diesel oil increased, and the content of polycyclic aromatic hydrocarbons increased to 11.2%, which failed to meet the national V diesel polycyclic aromatic hydrocarbon content 2 , the sparger is connected to the tray by welding, the test process uses an ultrasonic frequency of 20Khz, the ...

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Abstract

The invention specifically relates to a parallelly-distributed ultrasonic bubble column rectification device and a method, belonging to the field of rectification-rectification technology in the petrochemical industry. The parallelly-distributed ultrasonic bubble column rectification device comprises a bubble column and an ultrasonic generator, wherein the bubble column is internally provided witha plurality of trays and bubble caps; the outer wall of the bubble column is provided with at least two distributors at positions corresponding to one of the trays, and gradient distribution of temperatures and concentrations is formed from top to bottom; each distributor is connected with an ultrasonic transducer; one distributor corresponds to one ultrasonic transducer, and the included angle between the ultrasonic transducer and the distributor is 45 to 135 degrees; and the ultrasonic transducers are further connected with the ultrasonic generator. According to the invention, ultrasonic waves are effectively and uniformly transmitted to the trays in virtue of a proper angle; since the gradient distribution of temperatures and concentrations is formed from top to bottom, plate efficiency is improved, and ultrasonic effect is concentrated; so the device is applicable to separation of materials containing a great number of heavy components. The invention also provides the method usingthe device.

Description

technical field [0001] The invention belongs to the technical field of rectification-rectification in the field of petrochemical industry, and in particular relates to a rectification device and method of parallel distributed ultrasonic bubble-cap towers. Background technique [0002] Bubble tower is a tower type vapor-liquid contact device for rectification. It is the leading device of large refining and chemical enterprises. Bubble tower is widely used in rectification and gas absorption. Its investment accounts for a large proportion, and it is also the energy The operation status of the process with high consumption plays a decisive role in the benefit of the whole device. The tower is equipped with multi-layer horizontal trays, on which there are several short tubes for steam (or gas) to pass through, each of which is covered with a bubble cap with tooth gaps or small grooves on the bottom edge, and an overflow tube is installed. During operation, the liquid enters con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/18B01D3/14B01D3/42C10G7/00C10G7/12B01J19/10
Inventor 王文彬郭岩锋王鹏贠建华张剑裴小静吴宽亮
Owner CHINA PETROLEUM & CHEM CORP
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