초록 ▼

Apparatus and method for decreasing chemical requirements for chemicals injected into a stream a low concentrations, such as for dehydration of crude oil, are provided. An algorithm is used to provide a signal to decrease chemical injection rate of a variable rate pump if the water content of the tr

Apparatus and method for decreasing chemical requirements for chemicals injected into a stream a low concentrations, such as for dehydration of crude oil, are provided. An algorithm is used to provide a signal to decrease chemical injection rate of a variable rate pump if the water content of the treated oil has not exceeded a preset value in a preset time and to increase chemical injection rate if the water content of the treated oil is exceeded within a preset time. The algorithm allows the control system to learn from previous experience.

대표청구항 ▼

(amended) Apparatus for controlling the rate of chemical injection into a stream, the chemical being used to control a measurable variable, comprising: means for measuring the variable controlled by the chemical; means for comparing the variable controlled with a preset value; means for timing to de

(amended) Apparatus for controlling the rate of chemical injection into a stream, the chemical being used to control a measurable variable, comprising: means for measuring the variable controlled by the chemical; means for comparing the variable controlled with a preset value; means for timing to determine the number of time units since the variable exceeded the preset value; and means for producing a control signal for adjusting the chemical injection rate according to an algorithm based on the number of time units since the variable exceeded the preset value.