SU703128A1

SU703128A1 - Method of control of catalytic process

Info

Publication number: SU703128A1
Application number: SU782563461A
Authority: SU
Inventors: Фаиг Мамедали Оглы Абдуллаев; Мовсум Алмамед Оглы Мехтиев; Виктор Львович Левин; Алиман Багир Оглы Алиев; Октай Нуру Оглы Нуриев; Амрулла Фейзулла Оглы Амруллаев
Priority date: 1978-01-02
Filing date: 1978-01-02
Publication date: 1979-12-15

Description

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Изобретение относитс к области автоматизации производственных процессов и может быть использовано в нефтехимической и других отрасл х промышленности.The invention relates to the field of automation of production processes and can be used in the petrochemical and other industries.

Известен способ управлени каталитическим процессом Б реакторе с неподвнжным слоем катализатора, заключающийс в регулировании перепада температур на выходе и входе реактора воздействием на температуру сырь на входе в реактор 1.A known method of controlling a catalytic process B is a reactor with an unbased catalyst bed, which consists in controlling the temperature difference at the outlet and inlet of the reactor by affecting the temperature of the raw material at the entrance to the reactor 1.

Недостатком известного способа управ-, лени вл етс то, что поддержание максимального перепада температур в слое катализатора приводит к быстрой дезактивации катализатора. Кроме того, поддержание максимального перепада температур не всегда соответствует максимальному выходу целевого продукта, поскольку имеют место побочные реакции, привод щие к аналогичному тепловому эффекту.A disadvantage of the known control method is that maintaining the maximum temperature difference in the catalyst bed leads to a rapid deactivation of the catalyst. In addition, maintaining the maximum temperature difference does not always correspond to the maximum yield of the target product, since there are adverse reactions leading to a similar thermal effect.

Целью изобретени вл етс повь1шение производительности процесса.The aim of the invention is to increase the productivity of the process.

Указанна цель достигаетс тем, что в известном способе управлени каталитическим процессом в реакторе с неподвижным слоем катализатора, заключающемс вThis goal is achieved by the fact that in a known method of controlling a catalytic process in a fixed bed reactor,

регулировании перепада температур на выходе и входе реактора воздействием на температуру сырь на входе в реактор, по расходу сырь в реактор и давлению в реакторе дополнительно определ ют величину времени контакта сырь с катализатором и в зависимости от указанной величины времени контактируют величину перепада температур на выходе и входе реактора.controlling the temperature difference at the outlet and reactor inlet by influencing the temperature of the raw material at the reactor inlet, the flow of the raw material into the reactor and the pressure in the reactor further determine the amount of time the raw material contacts the catalyst, and depending on the specified time value, the magnitude of the temperature difference at the outlet and inlet contacts reactor.

На чертеже изображена блок-с сема системы управлени , реализующей описываемый способ.The drawing shows a block of the control system that implements the described method.

Способ управлени каталитическим процессом осуществл ют следующим образом.The method of controlling the catalytic process is carried out as follows.

Claims

The reactor 1 with a fixed catalyst bed through the pipeline 2 enters the raw material preheated in the furnace 3. The raw material is heated using fuel supplied through the pipe 4. The reaction products are removed from the reactor 1 through the pipe 5. The temperature of the raw material at the outlet to the layer The catalyst is measured by sensor 6, and at the output of it is measured by sensor 7. Signals from sensors 6 and 7 are fed to summing unit 8, which calculates the temperature difference in the catalyst bed. The pressure in the reaction zone of reactor 1 is measured by sensor 9, and the raw material consumption to reactor 1 is measured by sensor 10. Signals from sensors 6, 9 and 10 are fed to a computing unit 11, which calculates the contact time of the raw material with a catalyst, for example, by the expression W. VO-PO-T, where V is the catalyst-free volume of the reaction zone; Vo is a constant that changes and is determined during the next loading of the catalyst into the reactor, for example, during the catalytic reforming process once every one and a half, two years; PinTi - respectively, pressure and temperature (° K) in reactorVo - raw material consumption in reactor 1; consequently, the normal ROI To is pressure and temperature (° K). The output signal of the computing unit 11, proportional to the time of contact of the raw material with catalysis: atom, goes to the controller 12 of the differential T1 & ture, the input of which is connected to the output of the summing unit 8, and the output to the actuator 13 installed on the fuel supply pipe 4 furnace 3. To prevent the temperature of the raw material at the exit of the furnace 3 above the limit value, the switching-off relay 14 is used. The switching-off relay compares the current value of the raw material temperature to the reactor 1 and the set temperature value as indicated on line 15, and as the temperature rises above a predetermined value, it stabilizes the output of the temperature differential controller 12. It should be noted that, the upper limit value of the raw material temperature at the entrance to the reactor 1 is established depending on the duration of the catalyst run (with an increase in the duration of the path, the specified limit value increases). According to calculations using a mathematical model, using the described method will allow increasing the concentration of target products at the reactor exit (for example, for the catalytic reforming process) by 1%. Claim Method A method for controlling a catalytic process in a fixed-bed reactor with regulating the temperature difference at the inlet and inlet of the reactor by affecting the temperature of the raw material at the inlet of the reactor, characterized in that, in order to increase the productivity of the process, the flow of raw material into the reactor and the pressure in the reactor determines the time of contact of the feedstock with the catalyst, and depending on the specified value of the time of contact, adjust the value of the temperature difference at the outlet and inlet p ektor. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 166652, cl. On 01 J 8/02, 1960 (prototype). AAA / VVVV -V h / h / y / y / l /