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Warm washing automatic control system of filtering machine of refinery ketone-benzol combination unit

An automatic control system and combined device technology, applied in the direction of filtration separation, mobile filter element filter, separation method, etc., can solve the problems of increased production cost, poor quality, waste of solvent, etc.

Inactive Publication Date: 2009-06-03
HARBIN PENGXIN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The on / off control, sequence and time interval of the valves are all manually controlled by the operator, which is cumbersome and tense, and it is easy to cause poor warm cleaning effect due to inaccurate operation, waste solvent and increase production cost

Method used

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  • Warm washing automatic control system of filtering machine of refinery ketone-benzol combination unit
  • Warm washing automatic control system of filtering machine of refinery ketone-benzol combination unit
  • Warm washing automatic control system of filtering machine of refinery ketone-benzol combination unit

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Experimental program
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Effect test

Embodiment 1

[0018] Embodiment 1, the present invention a kind of oil refinery ketone benzene combined unit filter machine temperature washing automatic control system, it is made up of filter machine computer control system and filter machine system; Described computer control system includes control indoor unit and field unit . The PLC in the control room unit is a programmable controller, and the model selected by the present invention is: SYSMAC CS1, and its technical performance is as follows:

[0019] (1) The CS1 series provides more effective speed and capacity, memory and scalability in terms of CPU performance, which is not only suitable for the present but also can meet the requirements of the future.

[0020] (2) The CS1 series provides multiple ports for serial communication with external devices, providing better compatibility with external devices.

[0021] (3) The CS1 series supports communication through the three-layer network level, and it can even be a different form of...

Embodiment 2

[0023] Embodiment 2, the filter system of the present invention includes a filter liquid level control system and a warm washing process control system; wherein the liquid level control of the filter liquid level control system completes the following three tasks:

[0024] (1) Ensure that the liquid level of the filter is within the specified upper limit and lower limit, so that they have a certain buffer capacity.

[0025] (2) Under normal liquid level conditions, the balance between inlet flow and outlet flow is maintained most of the time.

[0026] (3) Maintain the balance of the front and rear process loads through volume buffering, and adjust the flow rate gradually and smoothly when the flow rate needs to be changed.

[0027] Based on the above three points, it is necessary to control the liquid level of 18 filters. The specific method is:

[0028] Cover the high vacuum section in the distribution head of the filter and add a baffle to keep the liquid level of the filt...

Embodiment 3

[0029] Embodiment 3, the filter system of the present invention comprises a filter liquid level control system and a warm washing process control system; wherein the various inlet and outlet valves and switch states of the filter of the warm washing process control system are controlled by Computer to do it automatically. According to the process requirements, the logic analysis is carried out on the switch of the valve, and the logic state matching the process requirements is compiled, so as to realize the automatic control of the process. The main control valves include: high vacuum discharge valve, middle vacuum discharge valve, low vacuum discharge valve, residual liquid valve, warm wash solvent feed valve, cold wash solvent feed valve, a total of 112 pneumatic pneumatic gates The valves are all controlled by explosion-proof two-position five-way pilot solenoid valves for ON / OFF control. Through the control of these valves, the operating intensity can be greatly reduced, h...

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Abstract

The invention aims at providing a warm washing automatic control system of a filtering machine of a refinery ketone-benzol combination unit, which can replace manual operation, save warm washing solvent, reduce consumption and improve production efficiency. The system consists of a computer controlled system of the filtering machine and a filtering machine system, wherein, the computer controlled system of the filtering machine automatically controls the warm washing process of the filtering machine system. By utilizing a sensor, a transducer and a rotating speed transducer which are set on site, site technique information is transmitted to a PLC computer composed by S7-300; the PLC computer implements automatic control output according to the application software which is programmed in advance to drive an executing agency. Therefore, whole automation of warm washing, the period of warm washing, operating sequence of warm washing, space of time and operation interlocking can be set and modified in a dialog mode at any time according to the technological requirements, thus completely meeting the requirements of technique production. The warm washing automatic control system safely and reliably runs for over six years, and the accumulated economic benefit reaches tens million of yuan RMB.

Description

(1) Technical field [0001] The invention relates to petroleum refining technology, in particular to an automatic control system for warm-washing of a filter machine of a ketone-benzene combined device in an oil refinery. (2) Background technology [0002] In the ketone-benzene dewaxing and deoiling unit of the refinery, 20-30 large-scale vacuum drum filters can be installed according to the production scale. This is the key equipment in the production process. Improve filtration efficiency. At present, the warm-washing operation of filters in dozens of refineries in China is controlled manually, and the warm-washing cycle is manually adjusted. Cleaning operations include: high vacuum discharge valve, middle vacuum discharge valve, low vacuum discharge valve, residual liquid valve, filter feed valve, warm wash solvent feed valve and cold wash solvent feed valve, etc. valves. The on / off control, sequence and time interval of the valves are all manually controlled by the ope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D33/44B01D33/06B01D37/04
Inventor 于洪成李树山
Owner HARBIN PENGXIN TECH
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