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Online monitoring system for wet flue gas

A monitoring system and wet flue gas technology, applied in the field of gas sampling, detection and analysis, can solve the problems of increased S element content and low extraction efficiency of fine particles

Pending Publication Date: 2016-06-22
上海北分科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing studies have shown that wet flue gas desulfurization has a very low removal efficiency for fine particles; in addition, after ammonia desulfurization, the concentration of particulate matter at the outlet increases significantly, and the morphology and elemental composition of particulate matter will change greatly before and after desulfurization For another example, after CaCO3 desulfurization, the fine particles are easily connected or wrapped by the desulfurization reaction products to form a dense irregular block or agglomerated structure, and the content of S element in the particles increases significantly after desulfurization; NaOH, CaCO3 and ammonia water are used After desulfurization by the method, the sulfur element content in the particulate matter increased from 1.33% before washing to 10.01%, 19.96% and 46.64% respectively

Method used

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  • Online monitoring system for wet flue gas
  • Online monitoring system for wet flue gas
  • Online monitoring system for wet flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] combine figure 2 ,Be explained. figure 2 It is the second schematic diagram of the system of the present invention, in which the direction of each airflow is expressed when the system is in monitoring work; each arrow represents the traveling direction of the airflow at the position. Explanation of symbols in the figure: 1. Filter head; 2. Sample gas pipe; 3. Gas mixing tank; 4. Diluent gas heating part; .Dilution gas blower; XTJF. Dilution gas regulating valve.

[0096] When the system is in monitoring work, the dilution gas blower XF sucks gas from the atmosphere to compress it, so that the gas naturally travels from the place with high pressure to the place with low pressure; when it reaches the place where the dilution gas heating component 4 is located, the gas travels while , is also heated. Diluent gas regulating valve XTJF, its input end is the diluted gas that is compressed and heated up, and its output end sends high-temperature dilution gas into the gas ...

Embodiment 2

[0106] combine image 3 , Figure 4 Be explained. image 3 It is the third schematic diagram of the system of the present invention, in which the direction of the relevant airflow is expressed when the system is in backflush cleaning, and each arrow represents the direction of travel of the airflow at the position. Figure 4 It is the fourth schematic diagram of the system of the present invention, in which the direction of the relevant airflow is expressed when the system is in backflush cleaning, and each arrow represents the direction of travel of the airflow at the position; this figure is also image 3 The equivalent sketch of .

[0107] Explanation of symbols in the figure: 1. Filter head; 2. Sample gas pipe; 3. Gas mixing tank; 4. Diluent gas heating component; 5. Exhaust gas discharge chimney; Interface; S2. Second interface; S3. Third interface; SF. Jet fan; STJF. Jet regulating valve; SLQ. Jet; STF. Electric three-way valve;

[0108] After the monitoring system w...

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PUM

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Abstract

The invention relates to the technical field of gas sampling, detection and analysis, and discloses an online monitoring system for wet flue gas. In the prior art, wet flue gas particles subjected to wet desulphurization cannot be monitored on line. According to the technical scheme, the online monitoring system is characterized in that a gas outlet of a diluent gas fan (XF), a heating gas pipe arranged at a diluent gas heating part (4) and an input connector of a diluent gas adjusting valve (XTJF) communicate through gas channels in sequence; an output connector of the diluent gas adjusting valve (XTJF) communicates with a mixed gas bucket (3); a sample gas pipe (2) communicates with the mixed gas bucket (3) through a gas channel; the mixed gas bucket (3) communicates with one end of a mixed gas pipeline through a gas channel; the other end of the mixed gas pipeline communicates with a passive gas inlet end opening of a jet device (SLQ) through a gas channel; a probe of a monitor is arranged in the mixed gas pipeline. The system has the beneficial effects that the wet flue gas particles subjected to the wet desulphurization can be monitored on line at a downstream part.

Description

technical field [0001] The invention relates to the technical field of gas sampling, detection and analysis, in particular to an online monitoring system for wet flue gas. Background technique [0002] Wet desulfurization is a common technical method to treat fixed pollution sources; the so-called fixed pollution sources, such as high-temperature flue gas discharged through the chimney of coal-fired power plants, etc. [0003] for example. In order to treat the high-temperature flue gas with serious pollution environment, the dust removal device in the flue firstly intercepts most of the dusty particles, and then removes a large amount of sulfide by the wet desulfurization device in the flue. [0004] After the treatment of relevant equipment, the composition of the high-temperature flue gas after treatment should be set up in the downstream of the wet desulfurization device, and an online monitor for the concentration of particulate matter should be installed. [0005] An...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06
Inventor 徐颖
Owner 上海北分科技股份有限公司