Sintering flue gas denitration method adopting oxidation method

A technology of sintering flue gas and oxidation method, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve problems such as unsolved problems, and achieve the effects of fast oxidation speed, short furnace shutdown and docking time, and small footprint

Inactive Publication Date: 2017-02-22
GUANGDONG J TECH ENVIRONMENT SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The principle is also to oxidize flue gas to oxidize sulfur and nitrogen oxides, but this patent also does not solve the problem of improving denitrification efficiency for specific factory conditions

Method used

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  • Sintering flue gas denitration method adopting oxidation method
  • Sintering flue gas denitration method adopting oxidation method

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Embodiment 1

[0033] The denitration system of the present invention includes a detection device, a flue gas intake device, an ozone plasma generator device, a controller, a denitrification device, a spray device, a desulfurization tower device, and an exhaust gas discharge device; the denitrification device is connected to the ozone plasma generator device and a flue gas inlet device, the desulfurization tower device is equipped with a spray device, the denitrification device is connected to the desulfurization tower device, and the tail gas discharge device is set at the top of the desulfurization tower device; the detection device is used to detect flue gas The concentration of flue gas components at the flue gas inlet and outlet of the air intake device and the O at the inlet and outlet of the ozone plasma generator device 3 concentration, the controller is connected to the detection device and the flue gas intake device, the ozone plasma generator device, and the controller controls the...

Embodiment 2

[0046] This embodiment 2 adopts the denitrification system and denitrification method of embodiment 1, the difference is that the flue gas enters the concentration and O 3 amount, as follows:

[0047] The flue gas contains NO x The concentration is 350mg / Nm 3 , said x=1 or 2; said NO accounts for 97% of the mass ratio of flue gas; NO 2 The mass ratio of the flue gas is 2.5%, and the plasma radicals include O 3 , O, e, the O 3 The mass ratio of oxygen source accounting for plasma radicals is 12%;

[0048] The output of the plasma free radical in the described ozone plasma generator device is 12kg / h, and the described NO-containing x Flue gas 50000Nm 3 / h. The ozone plasma generator device includes an ozone generator, the operating voltage of the ozone generator is 5kV, and the power frequency is 800-1200Hz.

[0049] Said step 2) in oxygen source and containing NO x After the flue gas is mixed, the NO and O in the mixture after entering the denitration device 3 The mas...

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Abstract

The invention discloses a sintering flue gas denitration method adopting an oxidation method. An oxygen source is discharged by use of an ozone plasma generator to produce plasma free radicals; the plasma free radicals convert NO in flue gas into NOx with higher valence states; the producing amount of the plasma free radicals is controlled according to the concentration of the flue gas; the mass ratio of NO to O3 in a mixture of the oxygen source and the NOx-containing flue gas is (0.8-1.5):1; the yield of the plasma free radicals in the ozone plasma generator is 6-12 kg / h, and the NOx-containing flue gas is 30,000-50,000 Nm<3> / h. The oxidation speed is high and the denitration efficiency is high; the higher NOx removal rate can be obtained through ozone plasma denitration, and the NOx removal rate can reach 98%.

Description

technical field [0001] The invention belongs to the field of flue gas treatment, and in particular relates to a denitrification method for sintering flue gas by an oxidation method. Background technique [0002] At present, the internationally mature denitrification processes mainly include selective catalytic reduction (SCR), non-selective catalytic reduction (SNCR) and activated carbon method, among which the denitrification efficiency of selective catalytic reduction method can reach more than 90%. The denitrification efficiency of catalytic reduction method and activated carbon method is relatively low, usually around 40%. [0003] The essence of sintering flue gas denitrification by oxidation is to oxidize nitrogen oxides in flue gas into high-valence substances that are easily absorbed by spray liquid. CN102764574A discloses a desulfurization and denitrification method for injecting streamer discharge plasma radicals into flue gas, which is characterized in that it in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/56
CPCB01D53/32B01D53/56B01D53/78B01D2251/604B01D2251/602B01D2251/304B01D2251/404B01D2251/2062B01D2258/0283
Inventor 胡小吐刘勇钟璐
Owner GUANGDONG J TECH ENVIRONMENT SCI CO LTD
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