Supercritical water processing control system and control method thereof

A supercritical water treatment and control technology, applied in the direction of oxidized water/sewage treatment, comprehensive factory control, comprehensive factory control, etc., can solve the problem of control system security, low reliability, unstable system performance, low degree of automation, etc. question

Inactive Publication Date: 2011-10-12
DALIAN ZHONGDING CHEM
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Problems solved by technology

[0003] The existing supercritical water treatment device is manually controlled, with low degree of automation, low security and reliability of the control system, unstable system performance, and requires a large number of operators. The shutdown rate is relatively high, regardless of the reason for the shutdown. Errors/faults or maintenance, t...

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  • Supercritical water processing control system and control method thereof
  • Supercritical water processing control system and control method thereof
  • Supercritical water processing control system and control method thereof

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[0163] Example: I / O is at addresses 8 and 9 in the S7-400H CPU; addresses 10 and 11 are not used. Accessing L ID 8 will cause the system to load the value DW#16#00000000 into the accumulator.

[0164] 4. Communication function

[0165] For programming device (PG) communication functions such as downloading and deleting blocks, one of the two CPUs must be selected even if the function affects the entire system on the redundant link. In redundant operation, data modified in one of the central processing units will affect other CPUs on the redundant link.

[0166] 5. The function of the synchronization module

[0167] The communication between two redundant S7-400H CPUs uses a synchronization module. Each CPU requires two synchronization modules, connected in pairs via fiber optic cables. The system supports hot-swappable synchronization modules, allowing users to participate in the maintenance of fault-tolerant systems and to control the failure of redundant connections with...

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Abstract

The invention relates to a supercritical water processing control system and a control method thereof. The supercritical water processing control system provided by the invention comprises a control unit, an analog signal acquisition unit, a digital signal acquisition unit and a field execution device, wherein the control unit is the control core of the system; the input end of the control unit is accessed to the field signals of the analog signal acquisition unit and the digital signal acquisition unit; the output end of the control unit is connected with the field execution device; the control unit is singly operated and automatically switched through the form configuration of redundancy pairs; and the control unit is in communication connection with an upper machine through Ethernet. The method provided by the invention comprises the starting course and stopping course of the supercritical water processing control system, the overvoltage protection course at the top of a reactor and the over-temperature protection course of the bearing wall of a mixer, the top cover of the reactor and a bearing barrel body. In the invention, the automation control degree is enhanced; the manual labor intensity and the number of personnel are greatly reduced; the operating cost is further lowered; and a digital signal processing technique is applied in software, thus the supercritical water processing control system has the advantages of excellent disturbance resistance and zero stability.

Description

technical field [0001] The invention relates to the technical field of supercritical water treatment equipment, in particular to a supercritical water treatment control system and a control method thereof. Background technique [0002] Supercritical water means that water is in a supercritical state when the temperature and pressure exceed the critical state temperature of 374°C and critical pressure of 22MPa respectively. Since supercritical water is an excellent solvent for both organic matter and oxygen, the critical water oxidation method can be used in the treatment of various toxic and harmful wastewater and waste, and can have a high removal rate for most refractory organic matter. Experiments have shown that the organic carbon content of organic wastewater between 27000-33000mg / L is treated by supercritical water oxidation, and the destruction rate of organic carbon exceeds 99.97%, and all organic matter is converted into carbon dioxide and inorganic matter. [0003...

Claims

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Application Information

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IPC IPC(8): G05B19/418C02F1/72
CPCY02P90/02
Inventor 王树众葛忠权徐东海王伟公彦猛姜东辉隋军
Owner DALIAN ZHONGDING CHEM
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