Patent ID: 11919778
Assignee: YUANCHU TECHNOLOGY (BEIJING) CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC C  B  Y | IPC B  C

Claim 0:
1. A system for recycling carbon dioxide, comprising:
a chlorinating reactor, configured to chlorinate a calcium-containing silicate and/or a magnesium-containing silicate to obtain calcium chloride and/or magnesium chloride;
a carbonation reactor, connected to the chlorinating reactor, configured to mix the calcium chloride and/or magnesium chloride with ammonia water and carbon dioxide and perform a carbonation reaction to convert the carbon dioxide into calcium carbonate and/or a magnesium carbonate while generating an ammonium chloride solution; and
a recovering device, connected between the carbonation reactor and the chlorinating reactor, configured to recover the ammonium chloride solution generated by the carbonation reactor, wherein the ammonium chloride solution after being concentrated or hydrogen chloride generated from a decomposition reaction of the ammonium chloride solution is directly fed from the recovering device into the chlorinating reactor,
wherein the recovering device is a single gas-liquid two phase reaction device without solid discharging structure, and is connected to a separator which is for discharging solid,
wherein the carbonation reactor is a single gas-liquid-solid three-phase reaction device for mixing ammonia gas, the calcium chloride and/or magnesium chloride, and gas containing the carbon dioxide together after the ammonia gas, the calcium chloride and/or magnesium chloride, and the gas containing the carbon dioxide are fed into the single gas-liquid-solid three-phase reaction device,
wherein the chlorinating reactor is any one of a stirred vessel and a rotary furnace, and the carbonation reactor is any of a bubble column, an airlift loop reactor, and a fluidized bed,
wherein the recovering device is implemented by:
an evaporative concentrator that separates the recovered ammonium chloride solution into water vapor and the concentrated ammonium chloride solution, wherein the concentrated ammonium chloride solution is fed to the chlorinating reactor, and the evaporative concentrator is further connected to the separator through a heat exchanger, through which the water vapor generated in the evaporative concentrator is sent back to the separator; or

an ammonia gas regeneration reactor that configured to decompose the recovered ammonium chloride solution into ammonia gas and hydrogen chloride, wherein the hydrogen chloride obtained by decomposition is fed to the chlorinating reactor, and the ammonia gas regeneration reactor is further connected to the carbonation reactor through a gas pipeline for feeding the ammonia gas obtained by the decomposition to the carbonation reactor.