Programmable additive controller
First Claim
1. Programmable additive controller apparatus for the chemical industry, comprising an additive supply line, a filter connected to the additive supply line, a control valve connected to the filter for controlling flow of additive from the supply line, a flowmeter connected to the control valve for measuring flow of additive, the flowmeter having a signal output for indicating additive volumes flowing through the flowmeter, a controller connected to the control valve for cyclically opening the control valve upon a command pulse, the controller having an input for inputting a quantity of additive to be added on each cycle and the controller having an opener for opening the control valve, the controller having an accumulator for accumulating signal output from the flowmeter and the controller having a comparator for comparing accumulated signal output from the flowmeter and the input quantity, and having a closing control for closing the control valve and preventing further flow of additive when the accumulated flowmeter signal output approaches the input quantity, and further comprising an output connected to the flowmeter for ejecting the additive into a main material flow.
1 Assignment
0 Petitions
Accused Products
Abstract
Programmable additive controllers control flow of fluid additives from a fluid supply line. A flowmeter is connected to the solenoid control valve for measuring flow of fluid. A controller opens and closes the control valve. A settable input controls cyclic operation of the controller. The controller further incorporates an input for required quantities of additive to be added on each cycle. A comparator in the controller compares a required quantity with signal output indicating flow through the flowmeter. The comparator is connected to a valve closing control for closing the control valve and preventing further flow of additive when the cumulative flowmeter output signal approaches the requirement. A three-way valve is connected to the flowmeter for selectively flowing fluid additive to a test and to an outlet for ejection into a mixing tank. The controller has an input for a local panel factor and reads out mixing ratio volume per cycle and total volume of additive.
-
Citations
20 Claims
- 1. Programmable additive controller apparatus for the chemical industry, comprising an additive supply line, a filter connected to the additive supply line, a control valve connected to the filter for controlling flow of additive from the supply line, a flowmeter connected to the control valve for measuring flow of additive, the flowmeter having a signal output for indicating additive volumes flowing through the flowmeter, a controller connected to the control valve for cyclically opening the control valve upon a command pulse, the controller having an input for inputting a quantity of additive to be added on each cycle and the controller having an opener for opening the control valve, the controller having an accumulator for accumulating signal output from the flowmeter and the controller having a comparator for comparing accumulated signal output from the flowmeter and the input quantity, and having a closing control for closing the control valve and preventing further flow of additive when the accumulated flowmeter signal output approaches the input quantity, and further comprising an output connected to the flowmeter for ejecting the additive into a main material flow.
- 7. The method of controlling additive injection to a chemical material flowing in a main line, comprising providing additive under pressure, filtering the additive, holding a control valve closed to prevent flow of the additive, presetting value A in a controller to preselect a quantity of additive flowing through a control valve upon each opening of the control valve, supplying power to the controller, supplying an injection command to the controller from a load method transmitter, opening the control valve in response to the command, metering flow from the control valve with a flowmeter, and injecting the output of the flowmeter into main line, incrementing first and second counters with signals from the flowmeter, comparing count in the first counter with the preselected quantity, closing the control valve upon reaching the preselected quantity with the count in the first counter.
Specification