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Marsh gas oxygen-enriched combustion-biogas slurry denitrification system and method

A technology of oxygen-enriched combustion and biogas slurry, which is applied in the field of biogas flue gas denitrification, can solve problems such as difficult to achieve biogas flue gas denitrification, achieve the effects of optimizing biogas combustion effect, promoting biogas combustion, and increasing biogas combustion temperature

Inactive Publication Date: 2019-07-30
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The combustion temperature of biogas in the internal combustion engine of the biogas generator set is higher than 1500°C, so it is easy to produce NO, and NO is difficult to dissolve in water, so it is difficult to achieve denitrification of biogas flue gas

Method used

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  • Marsh gas oxygen-enriched combustion-biogas slurry denitrification system and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: as figure 1 As shown, a biogas oxygen-enriched combustion-biogas slurry denitrification system includes a biogas generator set 7, a denitrification tank 2, a compressed air bottle 4, and a biogas slurry storage tank 5. The gas enters the bottom of the denitrification tank 2 through the flue gas pipeline, and the outlet of the compressed air bottle 4 communicates with the air inlet at the bottom of the denitrification tank 2 through the air pipeline. The gas outlet and the flue gas outlet are located above the atomizing nozzle 3. The liquid outlet at the bottom of the denitrification tank 2 is connected to the bottom liquid inlet of the biogas slurry storage tank 5 through a liquid delivery pipe. The outlet I communicates with the atomizing nozzle 3 on the top of the denitrification tank 2 through the biogas slurry delivery pipeline. The biogas slurry delivery pipeline is provided with a biogas slurry pump 6, and the top of the biogas slurry storage tank 5 ...

Embodiment 2

[0034] Embodiment 2: The biogas oxygen-enriched combustion-biogas slurry denitrification system in this embodiment is the same as that in Embodiment 1;

[0035] A biogas oxygen-enriched combustion-biogas slurry denitrification method, using a biogas oxygen-enriched combustion-biogas slurry denitrification system, the specific steps are as follows:

[0036] (1) Pass the biogas through the biogas pipeline to the internal combustion engine of the biogas generator set for oxygen-enriched combustion to generate electricity; the oxygen-enriched air in the oxygen-enriched combustion combustion-supporting oxygen-enriched air has an oxygen volume content of 30%;

[0037] (2) Step (1) The flue gas from the oxygen-enriched combustion is passed into the bottom of the denitrification tank through the flue gas pipe, and the air in the compressed air bottle is passed into the bottom of the denitrification tank through the air pipe; the flue gas flow rate is 5.1m 3 / min, the air flow rate is ...

Embodiment 3

[0041] Embodiment 3: The biogas oxygen-enriched combustion-biogas slurry denitrification system in this embodiment is the same as that in Embodiment 1;

[0042] A biogas oxygen-enriched combustion-biogas slurry denitrification method, using a biogas oxygen-enriched combustion-biogas slurry denitrification system, the specific steps are as follows:

[0043] (1) Pass the biogas through the biogas pipeline to the internal combustion engine of the biogas generator set for oxygen-enriched combustion to generate electricity; the oxygen-enriched air in the oxygen-enriched combustion combustion-supporting oxygen-enriched air has an oxygen volume content of 33%;

[0044] (2) Step (1) The flue gas from the oxygen-enriched combustion is passed into the bottom of the denitrification tank through the flue gas pipeline, and the air in the compressed air bottle is passed into the bottom of the denitrification tank through the air pipeline; the flue gas flow rate is 5.2m 3 / min, the air flow ...

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Abstract

The invention relates to a marsh gas oxygen-enriched combustion-biogas slurry denitrification system and method, and belongs to the technical field of marsh gas flue gas denitrification. According tothe marsh gas oxygen-enriched combustion-biogas slurry denitrification method, marsh gas oxygen-enriched combustion is performed to obtain a high combustion value, combustion flue gas is generated, nitric oxides in the combustion flue gas mainly include NO and NO2, NO of the combustion flue gas is dissolved in micro-alkaline biogas slurry in countercurrent contact to react with oxygen dissolved into the biogas slurry, some NO is further converted into NO2, and micro-alkaline biogas slurry drops absorb NO2 and NO and other gas in the flue gas under countercurrent contact to generate inorganic acid radical ions. According to the marsh gas oxygen-enriched combustion-biogas slurry denitrification system and method, the process technology is simple, operation is easy, the cost is low, the denitrification rate is high, operation is stable, no contamination is discharged, and the marsh gas flue gas nitrification operation cost and investment cost can be lowered.

Description

technical field [0001] The invention relates to a biogas oxygen-enriched combustion-biogas slurry denitrification system and method, and belongs to the technical field of biogas flue gas denitrification. Background technique [0002] NO X Under the action of sunlight, it will cause photochemical reaction and form photochemical smog, which will cause serious air pollution. [0003] There are three main mechanisms of NOx: fuel type, thermal type and fast type, among which the amount of NOx produced by the fast type is very small and can be ignored. Thermal NO x The formation of nitrogen is formed by the oxidation of nitrogen in the air under high temperature conditions, and the amount of formation depends on the temperature. When T<1500°C, the amount of NO generated is very small, and when T>1500°C, the reaction rate increases by 6-7 times for every 100°C increase in temperature. When the temperature is always high enough, the thermal NO x 20% of the total generatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/56C02F1/72F23L7/00F23J15/02C05G1/00C02F101/16
CPCB01D53/78B01D53/56C02F1/72F23L7/007F23J15/022C05C1/00C02F2101/16C05G5/20C05F9/04Y02A50/20Y02E20/34
Inventor 李法社隋猛王华王霜陈勇张小辉张逸水
Owner KUNMING UNIV OF SCI & TECH
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