摘要:
A production process such as an isocyanate production process, conducted with a production facility having (a) at least two incoming streams, b) at least one exit stream and c) at least one inner recycling stream is controlled by adjusting at least one incoming stream amount by means of regulating controls to control the exit stream concentration and/or amount.
摘要:
The invention relates to a method for producing polyesters or copolyesters without using a balance to dose the solid main raw material dicarboxylic acid, and to a corresponding concept for regulating the molar ratio of the paste prepared from the starting materials, without directly measuring the rate of flow of the solid main raw material dicarboxylic acid by weighing. The invention also relates to an indirect method for determining the raw material consumption without directly weighing the solid raw material. The regulation of the addition rate of the solid raw material is carried out on the basis of the deviation of the density of the finished paste from a solvent.
摘要:
A control apparatus for a reformer and a method of controlling the reformer are provided. The reformer gasifies a reformate fuel by a reforming reaction, supplies the obtained reformate gas to an energy converter (1) to convert the reformate gas into energy of another form, and heats the reformate fuel by burning emission containing unreacted flammable gas produced in the energy convener (1). The control apparatus comprises a reforming amount assessing device (S1, S11) for assessing the amount of the reformate fuel to be gasified, and an emission amount assessing device (S3, S4, S5, S6) for assessing the amount of emission to be supplied into the reformer on the basis of the assessed amount of reformate fuel. When using the unreacted hydrogen gas generated in a fuel cell for heating the reformate fuel, the unreacted hydrogen gas and combustion aid gas can be controlled so that the reformate fuel is heated properly.
摘要:
A system and method for controlling a microwave heated chemical process is disclosed. Time varying concentrations of some chemical substances within fumes in the microwave oven are monitored to detect concentration variations for which responses are known. Responses to the detected variations are initiated to control the chemical process without terminating the process. Examples of responses include varying microwave radiation energy, initiating safety systems, increased venting of the microwave oven, and so forth.