SU441941A1 - Device for automatic control of packed columns - Google Patents

Description

one

The invention can be applied for automatic control of the operation of packing devices in intensive hydrodynamic regimes in various processes of chemical technology.

A device for automatic control of a packed absorber is known, consisting of a perturbing action regulator and a valve for supplying an absorbent, where a differential pressure regulator with a functional compensation block is used as a control for perturbing action. in summer.

A disadvantage of this device 20 is the dependence of its dynamic characteristics and parameter settings of the controller on the variable parameters of the object, which

makes it unsustainable. ; 25

The purpose of the invention is to ensure the stable operation of the automatic control system of packed columns: irrespective of their variable parameters.

For this, the proposed device is equipped with an adaptation circuit consisting of an object model, an adaptation circuit compensation unit, a comparison element, an adaptation actuator, and a multiplication unit.

The drawing shows a diagram of the proposed device.

The main circuit includes packed column I, differential pressure regulator 2, functional block 3, realizing the dependence of the differential pressure on the gas load measured by sensor 4, multiplication unit 5, summing block b, regulating classH 7, It modifies the subsurface unit It is a divisive coyvneus 8. unit. The adaptation contour includes the object model 9, the comparison element 10, the load change compensation unit: the adaption loop ki II and the absolute-bj adaptive contour element of the weg. and T-TT about TTOkf ATZSh NITTCHL l TTP4 l - tion 12. The device works as follows .. YuM ..,. . . GT.N.M....g.v..:;: v.L. change in) | narrow in column 1 changes the pressure drop across the nozzle, while its linearity of the object changes its dynamic characteristics due to the non-linearity of the object. The differential pressure deviation signal is fed to the differential pressure regulator 2, where it is compared with a predetermined value from functional unit 3., and a control action is generated through the multiplication {L summing unit 6 to the regulating rivet, which changes the solution flow . At the same time, the differential pressure deviation signal arrives at the adaptation contour element 10, in which it is compared with the signal from the object model output, then W .V.UU MiVy WiUJCJ WWXfWXbJ.Uf the error signal is fed to the adaptation contour actuator 12 and the block multiply 5 in which the gain coefficient of the basis of 15 is tuned: in 6Td of the link in accordance with the changed dynamic characteristics of the object. At the same time, when the load changes, the signal from load sensor 4 is according to ---, 4uj.-ijuuM 4Qi. ujа & a h– ii j steps onto the dynamic combo block of the LFTPPvP no luchcht - „city ,,, sensation S, which has an effect through the summing lOaoK 6 on the control valve y. i Q rm pttgt m. also goes to the compensation block of the adaptation circuit II, the signal of which is summed up in the comparison element Ю with the signal of the object model 9 and is compared with the current value of the pressure drop. SUBJECT MATTER A device for automatic control of packed columns, containing a pressure differential controller, functional and summing units, a dynamic compensating unit, a solution supply valve, characterized in that, in order to ensure stable operation, it is equipped with an adaptation circuit consisting of a model object. ФЯТТИИГ ЛО ГПЛСТПТ ГД1 ГЖП «« «h-п ъ. COMPACTNIPAII wnnmwno о-ппт ™ пий лй1 S ° nf block and aeramnay block