Method for multi-production of simultaneous H2-CO-C2H2 and capturing of CO2 through circulating of calcium carrier

Abstract

The invention discloses a method for simultaneous multi-production of H2-CO-C2H2 and capturing of CO2 through circulating of a calcium carrier. According to the method, after industrially produced acetylene sludge slurry is subjected to ultrasonic treatment-edulcoration-calcination processes, acetylene sludge slurry is used as a calcium-base absorbent to be subjected to coal gasification to prepare high-concentration hydrogen, a solid mixture after the coal gasification mainly contains CaCO3 and unconverted coke, after the mixture is is calcinated in an O2 atmosphere in a calcining furnace, CO2 gas is captured, a part of generated CaO is used for producing hydrogen through coal gasification, the other part of generated CaO is used as a calcium carbide raw material for refining CaC2, and meanwhile, CO-rich synthesis gas is obtained and is respectively (1) used as a coal gasification raw material so as to increase hydrogen yield, (2) used for burning so as to supply heat to a system and (3) stored after being subjected to edulcoration and the like; and generated calcium carbide further reacts with water so as to obtain C2H2 gas and the acetylene sludge slurry, and the processes are repeatedly carried out. By virtue of waste utilization and recirculation of the calcium carrier, the simultaneous multi-production of high-purity H2-CO-C2H2 gas and the capturing of CO2 gas.

Description

Technical field

[0001] The invention relates to a combined operation system for preparing calcium carbide based on blast furnace oxygen heat and circulating fluidized bed calcium-based hydrogen production, and belongs to the technical field of combustion chemical engineering. Background technique

[0002] Calcium carbide is an important raw material for the organic synthesis industry. The fixed-bed arc method has been used for a long time, and the raw material loss is serious and the reaction rate is low. In recent years, with the proposal of the blast furnace oxythermal method for the preparation of calcium carbide, one furnace and three uses have been realized. 2 , Extracting charcoal from limestone, high temperature and low pressure gas generator completes coal gasification, and comprehensively utilizes the waste heat and coal ash during the coal gasification process. The coal ash is added to the ingredients and melted to generate CaC 2 And ferrosilicon. However, there are im...

Examples

Embodiment Construction

[0025] The present invention will be further described below in conjunction with the drawings and embodiments.

[0026] Such as figure 1 , figure 2 As shown, for the calcium carrier cycle to achieve H 2 -CO-C 2 H 2 Polygeneration Synergy CO 2 Block diagram of the capture process. Using industrial waste calcium carbide slag slurry, ultrasonic-removing impurities to extract calcium hydroxide, and then calcining-screening to obtain calcium-based adsorbent, which is used for coal gasification in a gasifier to produce high-purity hydrogen. After passing through the calciner, the calcium carbonate produced is calcined and decomposed into CaO, and CO is released at the same time. 2 gas. Part of the regenerated calcium-based adsorbent (CaO) is returned to the gasifier for coal gasification, and the other part is used as raw material for the oxythermal blast furnace to prepare calcium carbide. The oxy-thermal blast furnace obtains calcium carbide and at the same time produces by-product...

Technical field

[0001] The invention relates to a combined operation system for preparing calcium carbide based on blast furnace oxygen heat and circulating fluidized bed calcium-based hydrogen production, and belongs to the technical field of combustion chemical engineering. Background technique

[0002] Calcium carbide is an important raw material for the organic synthesis industry. The fixed-bed arc method has been used for a long time, and the raw material loss is serious and the reaction rate is low. In recent years, with the proposal of the blast furnace oxythermal method for the preparation of calcium carbide, one furnace and three uses have been realized. 2 , Extracting charcoal from limestone, high temperature and low pressure gas generator completes coal gasification, and comprehensively utilizes the waste heat and coal ash during the coal gasification process. The coal ash is added to the ingredients and melted to generate CaC 2 And ferrosilicon. However, there are im...

Examples

Embodiment Construction

[0025] The present invention will be further described below in conjunction with the drawings and embodiments.

[0026] Such as figure 1 , figure 2 As shown, for the calcium carrier cycle to achieve H 2 -CO-C 2 H 2 Polygeneration Synergy CO 2 Block diagram of the capture process. Using industrial waste calcium carbide slag slurry, ultrasonic-removing impurities to extract calcium hydroxide, and then calcining-screening to obtain calcium-based adsorbent, which is used for coal gasification in a gasifier to produce high-purity hydrogen. After passing through the calciner, the calcium carbonate produced is calcined and decomposed into CaO, and CO is released at the same time. 2 gas. Part of the regenerated calcium-based adsorbent (CaO) is returned to the gasifier for coal gasification, and the other part is used as raw material for the oxythermal blast furnace to prepare calcium carbide. The oxy-thermal blast furnace obtains calcium carbide and at the same time produces by-product...

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