：Overview

Oil blending is an important part in oil production activity. The performance of it will create direct influence on economic benefit of refinery. How to solve oil blending problem means how to realize optimization in oil blending process. The purpose of optimization is to achieve maximum benefit at lowest cost and without influence the quality of oil. So, oil blending optimization control system is important to achieve better economic benefit for the refinery.
：Main features
一、System composition
Operation monitoring station: 2 sets
Process control station: 1 set
Security/lightening proof cabinet: 1 set
Optimization software: 1 set
NMR analyzer: 1 set
Key Technical Indexes
Requirement on power supply: AC 220V/50Hz, 4KVA
Input Signal: 0 to 50kHz pulse
switch signal
digital communication signal
4~20 mA DC (4 to 20mA, DC)
(Output signal: relay contact)
4~20 mA DC (4 to 20mA)
Earth resistance:〈4Ω
Display usage: CRT and special lamp
Operation mode: special keyboard and mouse
Running mode: continuous
Operation condition

Ambient temperature: 0 to 40℃
Relative humidity: 10% to 90%
Total weight of operation desk: 300kg
Installation: Φ12mm stone bolt
Dimension of control cabinet: 2100H x 800D x 800W

：Index on reliability
MTBF Mean Time Between Failure >4000 hours
MTTR Mean Time To Recovery20 minutes replacing card
system availability: A=0.9999
Fundamental Function
Oil blending optimizing control system performs proportional control, formula optimization, loading and monitoring. Functions can be described as follow:
It boasts multiple display function

Alarm picture display, display overall information on alarm incident;
Flow chart display
Flow chart should contain information relating to process state. Equipment sign on the picture should change color in case that it is under control by signal.
Flow chart should display technological parameter for each equipment.
Parameter setting picture: you can use code to enter setup picture to revise individual parameter.
Pump picture: it is displayed according to process drawing. All variable parameters are displayed dynamically and alarm signal can be produced in case extraordinary situation occurs to it.

Operation recording picture: data relating to operation and alarm can be kept for 30 days and can be used at any time.
Report form display: various forms of report can be produced and which can be printed at any time or at fixed time.
Various type of alarm can be realized by the system.
Common function；

You can click the relevant button within the display picture to switch to the desired operation picture to perform dynamic monitoring.
CRT will display instantaneous flow-rate, accumulated flow-rate or blending proportion that is calculated automatically or designated by operator.
Monitoring status for all parameters, including pressure, temperature, valve, flow-rate, and liquid level. Performing real-time display or history tendency display, printing recorded flow-rate, temperature and pressure automatically. Performing real-time and online analysis and control on quality.
Setting parameter, operation code and symbol
Display liquid level for relevant tank, produce alarm signal, automatically print and record tank liquid level and volume, calculate temperature compensation, produce alarm signal on high and low liquid level, automatically record alarm information.

Failure diagnosis on system hardware and software。

You can transmit data to server via network, which will be used by dispatcher in production management. Production data can be stored in management database.
Select blending scheme according to process requirements

Being equipped with blending optimization software, with the help of it you can calculate an optimum blending plan, so as to obtain maximum economic benefit.
System report: according to requirement of party A, system can output various type of report form, which can be printed out at any time or at fixed time.
Produce alarm signal when process parameter overpass designated limit. Detailed information relating to current and history alarm parameter is displayed in different color. Handling information relating to these alarms is also displayed. Sound and light alarm can be produced. History incident of alarm can be recorded.
Display History Tendency: curves that are used for describing variation tendency of 8 process parameter at most can be displayed in different color. Digital quantity in which time is included as reference also can be displayed.
Software boasts excellent online assistance function and human-computer interface. Information window can be popped up automatically when performing important operation.
Data storing function: system can record and store collected data, operation information and various transformed data.

The process of blending
When the desired product is kerosene, the blending procedure can be described as follow: you should begin with inputting solidifying point, condensation temperature, price, minimum blending ratio for each ingredient, as well as the total amount of oil to be blended. Then, the system will produce ultimate blending plan after optimization calculation. After those parameters being verified, blending operation can be initiated. When blending operation is finished, blending result, report form, can be printed out. If the blending result meets quality requirement, you can operate the system to perform self-learning optimization operation (adding new optimization model to the system). When the desired product is gasoline, you should determine octane number, price, minimum blending ratio for each ingredient, as well as product octane number and the total amount of gasoline to be blended.

Operator can use CRT and keyboard to determine relevant parameter and quality parameter for oils in different pipe. Operator can perform various operation dialogs that need to be carried out before blending. Because computer system is equipped with blending software, operator can use it to calculate optimum blending plan. At last, operator is required to check operating process and valve state (open/close). In case no problem is found, blending operation can be initiated.
The flow-rate for each ingredient is regulated till it reaches the value stipulated in blending optimization plan. On CRT you can see instantaneous flow-rate and accumulated value, the percentage of each ingredient over total amount in terms of flow-rate, kerosene mass parameter or gasoline octane number, as well as opening of valve. At certain time before the accumulated value reach predetermined value. Computer will control the flow-rate of each ingredient to decrease in a given slope and stop transmission when predetermined amount is reached. At last, system will print out a blending report.

You can contact us for catalog or operation instruction.