facility monitoring method
facility monitoring method
 CN 102,419,591 B
 Filed: 03/17/2006
 Issued: 01/20/2016
 Est. Priority Date: 03/22/2005
 Status: Active Grant
First Claim
1. a method for monitoring facility performance, this facility has at least one equipment, this at least one equipment production at least one product consume at least one article at least one unit operations, and described method comprises:
 Periodically monitor and comprise the utilization rate of these at least one article, the throughput rate of this at least one product and the currency of the unit cost of production, the unit cost of production is by calculating to the throughput rate of major general'"'"'s value at cost relevant with the utilization rate of at least one in these at least one article divided by this at least one product;
Calculate and store utilization rate and the moving average of the described unit cost of production during predetermined time interval of these at least one article;
For each moving average, determine the reference value relevant to the quiet rum of this facility;
The periodically calculated performance factor is carried out by means of using the mathematical function of moving average and reference value, described performance factor comprises the commodity performance factor relevant to the use of described at least one article and the production efficiency performance factor relevant with the unit cost of production, described mathematical function so defines;
along with the increase of the use of described at least one article, commodity performance factor and production efficiency performance factor reduce, and along with Product recycling increases, production efficiency performance factor increases;
By at least contributing the approximate performance factor being weighted to generate weighting pro rata to performance factor with each performance factor to the production cost of this at least one product, then the performance factor of weighting being added, calculating the overall performance factor;
AndTo monitoring that the user of this facility performance shows the overall performance factor, and when the described overall performance factor does not meet its reference value, generate the corrective action of alarm and suggestion.
Chinese PRB Reexamination
Abstract
A kind of method (1) of equipment performance in monitoring facility, estimate in the method that such as starting material use the moving average of cost contribution item of (126), Product recycling, production of units efficiency (138), electricity usage (144) and controller error performance (148), statistical weight is carried out to determine the overall performance factor (154) to these moving averages.The overall performance factor (154) is applicable to the instant instruction of equipment operation.Skew (164) the diagnostic device problem of single performance factor.
8 Claims

1. a method for monitoring facility performance, this facility has at least one equipment, this at least one equipment production at least one product consume at least one article at least one unit operations, and described method comprises:

Periodically monitor and comprise the utilization rate of these at least one article, the throughput rate of this at least one product and the currency of the unit cost of production, the unit cost of production is by calculating to the throughput rate of major general'"'"'s value at cost relevant with the utilization rate of at least one in these at least one article divided by this at least one product; Calculate and store utilization rate and the moving average of the described unit cost of production during predetermined time interval of these at least one article; For each moving average, determine the reference value relevant to the quiet rum of this facility; The periodically calculated performance factor is carried out by means of using the mathematical function of moving average and reference value, described performance factor comprises the commodity performance factor relevant to the use of described at least one article and the production efficiency performance factor relevant with the unit cost of production, described mathematical function so defines;
along with the increase of the use of described at least one article, commodity performance factor and production efficiency performance factor reduce, and along with Product recycling increases, production efficiency performance factor increases;By at least contributing the approximate performance factor being weighted to generate weighting pro rata to performance factor with each performance factor to the production cost of this at least one product, then the performance factor of weighting being added, calculating the overall performance factor; And To monitoring that the user of this facility performance shows the overall performance factor, and when the described overall performance factor does not meet its reference value, generate the corrective action of alarm and suggestion.


2. the method for claim 1, wherein:

Described at least one article are starting material and electric power; Use rawmaterial utilization rate to calculate commodity performance factor and production efficiency performance factor; Also calculate and the moving average of the utilization rate of store power;
AndPerformance factor also comprises power consumption performance factor, selects the increase that described mathematical function makes along with power consumption, and power consumption performance factor reduces.


3. method as claimed in claim 2, wherein:

The Product recycling of described at least one product is a part for the described at least one product produced at least one equipment described; At least one number percent that currency also comprises this at least one product reclaims, and this at least one number percent reclaims this part based on this at least one product produced in this at least one equipment; Calculate and store this at least one product number percent reclaim moving average;
AndPerformance factor also comprises the number percent recyclability factor, and the increase selecting described mathematical function to make the number percent along with this at least one product to reclaim, the number percent recyclability factor also increases.


4. method as claimed in claim 3, wherein:

Currency also comprises the selfactuated controller performance relevant to the selfactuated controller for controlling this at least one unit operations, by suing for peace to the integrated square error between the measured value of the process variable that will be controlled by described selfactuated controller in this at least one unit operations and the desired value of described process variable, calculate selfactuated controller performance; Calculate and store the moving average of selfactuated controller performance;
AndDescribed performance factor also comprises the controller performance factor, and the reduction selecting described mathematical function to make along with integrated square error, the controller performance factor increases.


5. method as claimed in claim 4, comprises each performance factor of display further.

6. method as claimed in claim 5, wherein when at least one at least one performance factor of overall performance Summing Factor departs from related base values scheduled volume, passes on instruction to user.

7. the method as described in claim 5 or 6, mathematical function wherein used when determining performance factor is the ratio of reference value and moving average for power consumption performance factor, commodity performance factor and the controller performance factor, be the ratio of number percent production moving average and percentage production base value for the number percent production performance factor, be the ratio of difference between constant and unit cost running average and unit cost base value for production efficiency performance factor.

8. method as claimed in claim 7, wherein
This at least one equipment comprises hydrogen and the carbon monoxide equipment of the unit operations with a series of generation hydrogen product stream, carbon monoxide stream, output vapor stream and methanol wash column airflow; 
Hydrogen and carbon monoxide equipment from hydrogen stream as input of another hydrogen and carbon monoxide equipment inputting hydrogen, and consume natural gas flow as the charging of steam methane reformer and fuel; Raw material is the rock gas of natural gas flow; This at least one product is the hydrogen of hydrogen product stream; The throughput rate of this at least one product is the hydrogen flowing quantity of hydrogen product stream; Described currency comprises natural gas flow, methane gas washing stream, the hydrogen stream of input, the methane feed stream of methane reactor internal consumption, carbon monoxide stream and exports the flow of vapor stream; Calculate the thermal content exporting vapor stream; Value at cost is high heat value, and to the hydrogen stream of natural gas flow, methane gas washing stream, input, high heat value that methane feed stream is relevant with carbon monoxide stream calculation;
AndThe unit cost of production is by performing the energy equilibrium of hydrogen and carbon monoxide equipment and being determined by the hydrogen flowing quantity of described energy equilibrium divided by hydrogen product stream, described energy equilibrium exports the thermal content of vapor stream and the second summation calculates by deriving the first and second summations and deducting from the first summation, first summation is by obtaining the flow of hydrogen stream of natural gas flow, methane gas washing stream and input and the product addition of relevant high heat value, and the second summation obtains by being multiplied with relevant high heat value by the flow of methane feed stream and carbon monoxide stream.

Specification(s)