Zinc oxide powder desulfurization control device and method based on online monitoring data interlocking
A technology of zinc oxide powder and monitoring data is applied in the field of zinc oxide powder desulfurization control device based on online monitoring data interlocking, which can solve the problem that the desulfurization process cannot be monitored and controlled dynamically in real time, so as to reduce the investment and maintenance investment of testing equipment, simplify the Operational logic, the effect of reducing the difficulty of configuration
Active Publication Date: 2018-03-16
云南云铜锌业股份有限公司
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Problems solved by technology
[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a zinc oxide powder desulfurization control device and method based on online monitoring data interlocking, aiming to solve the problem that the existing desulfurization process cannot be monitored and dynamically controlled in real time
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[0040]Specific example: the flue gas of the 140,000 t / a acid-making system of a certain factory adopts the desulfurization method of zinc oxide powder, and the flue gas flow rate is 50,000m 3 / h, SO before flue gas desulfurization 2 The concentration value is 2000~3000 mg / m 3 , the local emission limit is 400 mg / m 3 .
[0041] According to the data from the trial production, the zinc oxide powder slurry with a solid content of 15% (mass percentage) was prepared as the absorbing liquid for desulfurization;
[0042] The flue gas from the acid production enters the absorption tower and reacts with the absorption liquid for desulfurization, and the tail gas is directly discharged into the chimney, and the tail gas SO 2 The concentration is detected in real time by the online monitor, and the detection data is transmitted to the central control system;
[0043] In the central control system, set the interlocking conditions for the start and close of the liquid discharge pneumat...
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The invention discloses a zinc oxide powder desulfurization control device based on online monitoring data locking and a zinc oxide powder desulfurization control method. The zinc oxide powder desulfurization control device comprises an absorption tower and a chimney, wherein the chimney is connected to the absorption tower; the absorption tower is also connected with an absorption liquid storage tank which is used for supplementing absorption liquid in the absorption tower and a discharged liquid storage tank which is used for collecting the absorption liquid discharged from the absorption tower; a liquid supplementation pneumatic valve is arranged between the absorption tower and the absorption liquid storage tank; a discharged liquid pneumatic valve is arranged between the absorption tower and the discharged liquid storage tank; the chimney is connected with an automatic monitor; the automatic monitor is connected with a central control system; the central control system is used for carrying out signal control on the liquid supplementation pneumatic valve and the discharged liquid pneumatic valve. According to the zinc oxide powder desulfurization control method disclosed by the invention, the problems of data drift or distortion, multivariable detection data asynchronization and the like existing in a traditional control method are avoided, the arithmetic logic of the central control system is simplified, the configuration difficulty of a DCS (Distributed Control System) is reduced, the inspection equipment investment and the maintenance investment are reduced, and the rate of reaching the emission standard of tail gas SO2 in each year is greater than or equal to 98 percent.
Description
technical field [0001] The invention relates to the field of zinc oxide powder desulfurization technology, in particular to a zinc oxide powder desulfurization control device and method based on online monitoring data interlocking. Background technique [0002] The traditional wet desulfurization mainly replaces the absorption liquid in the absorption tower by monitoring the solid content and pH value of the absorption liquid in the absorption tower. In recent years, the industrialization of zinc oxide powder desulfurization in lead and zinc smelting enterprises also adopts the above control process; in addition, It was also proposed to monitor the flue gas sulfur dioxide concentration, flue gas volume, flue gas concentration, flue gas temperature and other variables in real time before desulfurization, and transmit the monitoring data to the calculation module for calculation and processing. The absorption liquid to ensure that the flue gas discharge meets the standard. ...
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IPC IPC(8): B01D53/80B01D53/50
CPCB01D53/507B01D53/80B01D2251/602B01D2258/0283B01D2259/126
Inventor 杨美彦曾鹏张浩杰王林朱学云李永祥范政陈建杰黄孟阳尧必俊郭涛王洪亮刘志民
Owner 云南云铜锌业股份有限公司
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