Vent stack temperature as a feedforward variable for smelt dissolving tank TTA control
AssigneeFPInnovations
InventorsBruce James Allison, Wei Ren, Brennan Dubord, Jason Johnson
Life of this patent
Estimating the term…
Abstract
Methods and systems for controlling operation of a smelt dissolving tank receiving a flow of smelt and having a vent stack in fluid communication are provided. A dissolving liquid is injected into the smelt dissolving tank at a predetermined injection rate. A temperature of a flow of vapour in the vent stack is measured with a sensor. The injection rate of the dissolving liquid is controlled based on the temperature of the flow of vapour.
Claims20
A method for controlling operation of a smelt dissolving tank receiving a flow of smelt and having a vent stack in fluid communication with the smelt dissolving tank, comprising:
- injecting, at a predetermined injection rate, a dissolving liquid into the smelt dissolving tank;
- measuring a temperature of a flow of vapour in the vent stack with a sensor;
- and
- controlling the injection rate of the dissolving liquid based on the temperature of the flow of vapour.
A system for controlling operation of a smelt dissolving tank, comprising:
- the smelt dissolving tank receiving a flow of smelt and having a vent stack in fluid communication with the smelt dissolving tank;
- a processing unit;
- and
- a sensor coupled to the processing unit, the sensor positioned at the vent stack of the smelt dissolving tank;
- a non-transitory computer-readable memory having stored thereon program instructions executable by the processing unit for:
- injecting, at a predetermined injection rate, a dissolving liquid into the smelt dissolving tank;
- measuring a temperature of a flow of vapour in the vent stack with a sensor;
- and
- controlling the injection rate of the dissolving liquid based on the temperature of the flow of vapour.
A system comprising:
- a smelt dissolving tank adapted to receive a flow of smelt;
- a vent stack in fluid communication with the smelt dissolving tank;
- a sensor positioned at the vent stack, configured to measure a temperature of a flow vapour in the vent stack;
- and
- an injection rate controller configured to:
- receive a reading indicative of the temperature from the sensor;
- and
- control an injection rate of a dissolving liquid into the smelt dissolving tank based on the reading.
Dependencies are inferred from the claim text.