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Online continuous SO3 monitoring device and method

A technology of monitoring device and absorbing device, which is applied in the direction of measuring device, material analysis through electromagnetic means, instruments, etc., can solve problems such as online monitoring of concentration, achieve timely result feedback, simple device structure, and improve monitoring effect

Inactive Publication Date: 2016-05-25
HUADIAN ELECTRIC POWER SCI INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

SO 3 Emissions have adverse effects on the stable operation of follow-up equipment and air pollution control. However, because the current environmental protection standards do not 3 Therefore, domestic power plants have not yet controlled SO in flue gas 3 The concentration is monitored online, and there are no mature related equipment products for the market, and the relevant tests are all carried out by manual sampling and analysis.

Method used

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  • Online continuous SO3 monitoring device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] refer to figure 1 , the SO of this example 3 On-line continuous monitoring device, including filter 1, sampling gun with heat tracing 3, tee 2, heat tracing pipe 4, absorption device, absorption liquid storage tank 12, flow meter 6, air pump 7, peristaltic pump 9 and compressed air tank 14 .

[0041] The filter 1 is arranged at one end of the sampling gun 3 with heat tracing, and the other end of the sampling gun 3 with heat tracing is connected with the tee 2 . The inner wall channel of sampling gun 3 with heat tracing adopts polished and high-temperature-resistant nano-coating stainless steel tube or stainless steel tube with embedded nano-ceramic sleeve.

[0042] The tee 2 is also connected to the heat tracing pipe 5 and the compressed air tank 14 through the valve 15 respectively. The heat tracing pipe 5 is a conventional industrial heat tracing device, which can be extended to maintain the gas temperature and prevent gas condensation.

[0043] The heat tracing p...

Embodiment 2

[0058] This embodiment is similar to embodiment 1, and its difference is:

[0059] 1. Reference figure 1 , the SO of this example 3 The online continuous monitoring device also includes a flushing device, including a flushing pump and a flushing water tank, and the flushing water tank is connected to the absorption device through the flushing pump.

[0060] 2, the SO of this embodiment 3 In the online continuous monitoring method, the absorption liquid is a mixed liquid obtained by mixing a saturated sodium bisulfite solution and a 5%-20% isopropanol solution in a ratio of 85%:15%.

Embodiment 3

[0062] This embodiment is similar to embodiment 1 or embodiment 2, and its difference is:

[0063] 1. Reference figure 1 , the SO of this example 3 The online continuous monitoring device also includes a control module and a digital display module, and the digital display module is connected with the absorption device through the control module.

[0064] 2, the SO of this embodiment 3 In the online continuous monitoring method, the absorption liquid is a mixed liquid obtained by mixing saturated sodium bisulfite solution and 5%-20% isopropanol solution in a ratio of 80%:20%.

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Abstract

The invention relates to an online continuous SO3 monitoring device and method. According to the method, two sets of absorption bottles are used for absorbing SO3 in exhaust gas; on one hand, the two sets of absorption bottles alternatively work, so as to realize the continuous and uninterrupted monitoring; on the other hand, the absorption bottles are used for absorbing SO3 in the exhaust gas, so that the device provided by the invention can be widely applied to an environment-friendly online monitoring system.

Description

technical field [0001] The invention relates to the technical field of air pollution control, in particular to a SO 3 On-line continuous monitoring device and method. Background technique [0002] SO emissions from coal-fired power plants 3 It mainly comes from two aspects: on the one hand, about 0.5%-1.5% of sulfur will be oxidized to SO in the coal combustion process 3 ; On the other hand, in the SCR denitrification process, about 1% of SO in the flue gas will be decomposed under the action of the catalyst 2 converted to SO 3 . For medium-high sulfur coal, the SO in the flue gas at the outlet of the denitrification equipment 3 Concentration up to 140mg / m 3 -180mg / m 3 Even higher, even through the follow-up equipment to reach the concentration of chimney inlet discharge will still reach 50mg / m3 3 above. SO 3 Emissions have adverse effects on the stable operation of follow-up equipment and air pollution control. However, because the current environmental protection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/416G01N27/38
CPCG01N27/4162G01N27/38
Inventor 杨用龙朱跃孙海峰张杨杜振
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD
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