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Dry desulfurizing process implementing automatic control based on environment friendly monitoring network and numeration table

A dry desulfurization and monitoring network technology, which is applied in measurement devices, separation methods, chemical instruments and methods, etc., can solve the problems of inability to automatically control the desulfurization system and monitor the amount of desulfurization agent in real time, and achieve the effect of improving desulfurization efficiency.

Inactive Publication Date: 2008-12-10
山东国仁节能科技有限公司
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  • Application Information

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Problems solved by technology

[0006] In order to overcome the deficiency that the existing dry desulfurization technology cannot automatically control the desulfurization system and monitor the amount of desulfurization agent in real time, the problem to be solved by the present invention is to provide a dry desulfurization process that realizes automatic control based on an environmental monitoring network and a digital meter

Method used

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  • Dry desulfurizing process implementing automatic control based on environment friendly monitoring network and numeration table
  • Dry desulfurizing process implementing automatic control based on environment friendly monitoring network and numeration table
  • Dry desulfurizing process implementing automatic control based on environment friendly monitoring network and numeration table

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Embodiment 1

[0036] The tonnage of a circulating fluidized bed boiler in a power plant is designed to be 2×75t / h+1×90t / h, and the desulfurization method of the present invention is adopted. The process flow is shown in Figure 3.

[0037] The specific design basis is as follows:

[0038] Sulfur content in coal ≤ 1.7%

[0039] During normal production, the coal consumption of a single boiler is ≤14.5t / h

[0040]Boiler flue gas volume 150000m 3 / h

[0041] SO before desulfurization 2 Emission concentration 2660mg / Nm 3

[0042] Implement the method that the present invention applies PLC control system to implement the calcium spray desulfurization in circulating fluidized bed boiler furnace:

[0043] Purchased desulfurizer --- limestone powder pressure tanker 1, pneumatically conveyed (0.2MPa) to 100m by the on-board pump 3 In the storage bin 2, the particle size of the desulfurizer is required to be 0.01-1mm. The top of the storage bin is equipped with a pressure release valve 3, a STD...

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Abstract

The invention discloses a dry desulfurization process with automatic control realized based on a monitoring network for environmental protection and a digital meter; wherein, the process comprises the steps that: a gate valve arranged below a bin is opened, and a discharger is started; powder enters an air lock and wind powder mixing device after being metered by a flow meter and then is blown into a boiler by a blower through a closed pipeline; after going through a ,pyrolysis, the powder reacts with SO2; a flue gas monitoring device arranged on a chimney transmits the monitored concentration value of SO2 as an analog quantity output signal to a PLC control system; according to the analog quantity output signal, the rotating speed of an electric motor of the discharger is controlled by the PLC control system to regulate the feeding; the instant flow and accumulated flow value provided by the flow meter arranged on a powder conveying pipeline are uploaded as an analog quantity signal to the PLC control system; on one hand, the instant flow and accumulated flow value function as data storage of the PLC control system, and on the other hand the data are transmitted in real time to an online monitoring network for environment-protection department. In the dry desulfurization process, the environmental-protection department realizes a distant monitoring of the dosage of desulfurizer, thus saving the dosage of limestone powder saved and simultaneously lowering the working intensity of the operating stuff.

Description

technical field [0001] The invention relates to a method for dry desulfurization of a circulating fluidized bed boiler, in particular to a dry desulfurization process for realizing automatic control based on an environmental protection monitoring network and a digital meter. Background technique [0002] At present, the well-known circulating fluidized bed boiler dry desulfurization technology controls the desulfurization system and SO 2 Concentration monitoring is done manually by the operator. The delivery of desulfurization agent to the circulating fluidized bed boiler is mainly to simply add desulfurization agent powder to the coal conveyor belt, but cannot automatically control the operation of the desulfurization system to achieve the purpose of continuously delivering desulfurization agent to the circulating fluidized bed boiler , resulting in uneven addition of desulfurizer, low utilization rate, low desulfurization efficiency, and the inability of the environmental...

Claims

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Application Information

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IPC IPC(8): B01D53/50B01D53/81G01F1/00
Inventor 朱学智
Owner 山东国仁节能科技有限公司
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