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An oxygen-enriched combustion tail gas treatment system using low-temperature desublimation method

A technology of oxygen-enriched combustion and tail gas treatment, which is applied in gas treatment, sublimation, solidification, etc., can solve the problems of inability to realize heat exchange, and achieve the effect of simple structure and high heat exchange efficiency

Active Publication Date: 2020-06-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The disadvantage of this invention is that the state when carbon dioxide is produced is high pressure, which requires the oxygen and natural gas in the combustion furnace to be high pressure, and there are certain requirements for the pressure of raw gas; in addition, carbon dioxide is in the process of phase change. Heat exchange with other fluids is achieved in a non-contact manner, and sufficient heat exchange cannot be achieved

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  • An oxygen-enriched combustion tail gas treatment system using low-temperature desublimation method

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Embodiment

[0027] see figure 1 In this embodiment, the oxy-fuel combustion tail gas treatment system adopting the low-temperature desublimation method includes an oxy-fuel combustion device, a carbon dioxide capture device and an air separation device 6 .

[0028] The oxygen-enriched combustion device includes a combustion furnace 8 and a tail gas processor 9. The combustion furnace 8 can carry out oxygen-enriched combustion, and the tail gas produced contains high-concentration carbon dioxide gas. The tail gas processor 9 has functions such as filtering, adsorption and drying. 8 The exhausted tail gas is dried and purified to obtain carbon dioxide raw material gas that can be used for capture.

[0029] The carbon dioxide capture device includes a desublimation chamber 1 , a liquefaction chamber 2 and a liquid storage tank 16 . The desublimation chamber 1 and the liquefaction chamber 2 are set in the same chamber, separated by a movable sealing plate 3, the liquefaction chamber 2 is loc...

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Abstract

The invention discloses an oxygen-enriched combustion tail gas treatment system adopting a low-temperature condensation method, and belongs to the technical field of industrial waste gas treatment. The tail gas treatment system comprises a carbon dioxide capturing device communicating with a tail gas end of an oxygen-enriched combustion device; the oxygen-enriched combustion device comprises a combustion furnace, an oxygen supplier for providing oxygen for combustion in the combustion furnace, and a tail gas treater communicating with an exhaust end of the combustion furnace and used for purifying and outputting carbon dioxide gas; the carbon dioxide capturing device comprises a condensation cavity, a cold source for providing a cold capacity to the condensation cavity, a liquefying cavityseparated from the condensation cavity through an openable sealing plate, and a liquid storage tank for collecting liquid in the liquefying cavity; a heat exchange coil is arranged at the bottom of the liquefying cavity; a gas outlet communicating with the condensation cavity is formed in the side wall of the liquefying cavity; and after carbon dioxide output from the tail gas treater is introduced in the heat exchange coil, the heat exchange coil communicates with the condensation cavity. The tail gas treatment system can realize pressurization without using additional energy, and improves the energy utilization rate.

Description

technical field [0001] The invention relates to the technical field of industrial waste gas treatment, in particular to an oxygen-enriched combustion tail gas treatment system using a low-temperature desublimation method. Background technique [0002] At present, most of the power generation systems in my country's power industry use air-assisted combustion. my country consumes a large amount of coal and emits a large amount of carbon dioxide every year, posing a threat to the global climate. Oxygen-enriched combustion technology is one of the most potential large-scale carbon emission reduction technologies for coal-fired power plants. It uses high-purity oxygen instead of combustion-supporting air on the basis of existing power plant boiler systems, and can obtain up to 80% volume concentration Carbon dioxide flue gas and tail gas containing high concentration of carbon dioxide can be utilized as resources through a series of related measures. [0003] The traditional tre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25J1/02B01D53/00B01D7/02
CPCB01D7/02B01D53/00B01D2257/504F25J1/0201F25J1/0234F25J1/0235Y02P70/10
Inventor 厉劲风邱利民王建熊王雅宁
Owner ZHEJIANG UNIV
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