Control device of natural gas ethane recovery device and using method

A recovery device and control device technology, applied in the controller, measuring device, electric controller, etc. with specific characteristics, can solve the problem that the natural gas ethane recovery device cannot operate safely and smoothly, achieve stable system pressure and avoid repeated fluctuations Effect

Pending Publication Date: 2020-08-28
XIAN CHANGQING TECH ENG +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a control device and usage method of a natural gas ethane recovery

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Control device of natural gas ethane recovery device and using method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] [Example 1]

[0027] Such as figure 1 As shown, a control device of a natural gas and ethane recovery device includes multiple rows of natural gas and ethane recovery devices. Each row of natural gas and ethane recovery devices includes a demethanizer 1, an expander expansion end 2, an expander booster end 3. The centrifugal compressor 4, the first controller 8, the second controller 9, the third controller 10, the fourth controller 11 and the expander controller 12, the expansion end 2 input end of the expander is connected with the expansion end intake line, The expansion end inlet pipeline is also connected with a flow detector 5 and a first pressure detector 6, the expansion end 2 output port of the expander is connected to the demethanizer 1 input port through the expansion end output pipeline, and the expansion end output pipeline is also connected The third pressure detector 14, the output end of the demethanizer 1 is connected to the booster end 3 input port of t...

Example Embodiment

[0035] [Example 2]

[0036] Such as figure 1 As shown, on the basis of embodiment 1, a branch line is also connected to the inlet of the demethanizer 1 on the expansion end intake line, and the branch line is also connected with a JT valve 17, a JT valve 17 and a first controller 8 Electrical signal connection.

[0037] The branch line of the intake pipeline at the expansion end is directly connected to the input port of the demethanizer 1, and the branch line is connected to a JT valve 17 for transmitting gas through the branch line when the expander fails. The JT valve 17 is electrically signaled to the first controller 8.

[0038] It also includes a cold box 16 through which the output pipeline of the demethanizer passes.

[0039] The natural gas and ethane recovery device also includes a cold box 16 through which the output pipeline of the demethanizer passes to cool down the gas in the pipeline.

[0040] There are 4 rows of natural gas and ethane recovery units.

[0041] There ar...

Example Embodiment

[0042] [Example 3]

[0043] Such as figure 1 As shown, on the basis of Example 2, a method for using a control device of a natural gas ethane recovery device includes the following steps:

[0044] In the first step, the flow detector and the first pressure detector are selected, and the first controller 8 of each column of natural gas ethane recovery device is controlled by the third controller 10, so that the first controller 8 of any three columns adopts the flow rate Detector 5 signal, the remaining one row of first controller 8 uses the first pressure detector 6 signal to control the speed of each row of expanders;

[0045] When the flow detector 5 is used as the feedback, the normal value of the flow is set to F0, the flow detector 5 measures the flow at the inlet as FC, and the first controller 8 uses the classic PID algorithm to control according to the flow deviation between FC and F0 The opening of the guide vane valve 13 can be used to control the speed of the expander a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a control device of a natural gas ethane recovery device and a using method. The control device comprises multiple columns of natural gas ethane recovery devices, each column of natural gas ethane recovery device comprises a demethanizer, an expansion end of an expansion machine, a pressurization end of the expansion machine, a centrifugal compressor, a first controller, asecond controller, a third controller, a fourth controller and an expansion machine controller. The expansion end input end of the expansion machine is connected with an expansion end air inlet pipeline; a flow detector and a first pressure detector are further connected to the expansion end air inlet pipeline. An expansion end output port of the expansion machine is connected to an input port ofthe demethanizer through the expansion end output pipeline, and the expansion end output pipeline is further connected with a third pressure detector. By means of the expansion machine-JT valve control method, stable operation of the multi-column natural gas ethane recovery device is achieved, and frequent fluctuation of the device pressure is avoided.

Description

technical field [0001] The invention belongs to the field of natural gas processing, and in particular relates to a control device and a use method of a natural gas ethane recovery device. Background technique [0002] The task of the natural gas ethane recovery device is to reduce the temperature of natural gas through expansion or refrigerant refrigeration, and to separate ethane (C2), propane (C3) and the above components at low temperature. The combined refrigeration method of expansion refrigeration and refrigerant refrigeration is often used . [0003] At present, the processing capacity of domestic natural gas dehydrogenation equipment is small, generally less than 2 million cubic meters per day, and only propane (C3) and above components are recovered, and ethane (C2) is not recovered. A natural gas dehydrogenation treatment plant has at most 1 or 2 column fixtures. The control strategy of the expansion refrigeration of the dehydrogenation unit is: when the single-...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C07C9/06C07C9/00C07C7/00G01D21/02G05B11/42
CPCC07C7/005G05B11/42G01D21/02C07C9/06C07C9/00
Inventor 任晓峰杨充常志波左晨刘子兵张鑫邱鹏李卫刘元刚
Owner XIAN CHANGQING TECH ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap