Process and system for combining waste electricity hydrogen production with circulating fluidized bed boiler combustion

[0034] A typical embodiment of the present invention provides a process of waste electric hydrogen binding circulating fluidized bed boiler combustion, including electrolytic water hydrogen production steps and circulating fluidized bed boilers combustion power generation step;

[0035] When the depth peak, a part of the flue gas extracted by the circulating fluidized bed boiler combustion power generation process is used as a circulating flue gas, and a part of the circulating flue gas is mixed with air or oxygen, and the wind is a fluidized wind from the lower part of the furnace. After mixing another part of the cyclic flue gas and oxygen, the secondary wind is sent from the upper part of the furnace into the furnace; the oxygen content in the primary wind is lower than the oxygen content in the air, and the oxygen content in the secondary wind is higher than the air. Oxygen content;

[0036] The oxygen for mixing is from the electrolytic water hydrogen step; the electrolytic water hydrogen step is electrolyte hydrogen hydrogen, the exhaust charge comprises a depth peset amount.

[0037] The present invention adds the oxygen obtained by the electrolytic water to a partially circulated flue gas into the circulating fluidized bed boiler, form an oxidative atmosphere in the upper portion of the furnace, and enhances the cycle of depth peak. The combustion efficiency of the bed boiler. The cyclic fluidized bed boiler oxygen-enriched burn part is mixed by the partial flue gas of the tail flue, the circulating flue gas is mixed with air or electrolytic water to form a low oxygen content (less than 21%). As the fluidized wind enters the furnace, the lower portion of the furnace forms a reducing atmosphere, inhibiting the formation of nitrogen oxides in the furnace. Since the flow rate of the primary wind increases, the fluidization wind speed is improved, and the fluidization of the lower portion of the censored area of ​​the lower portion of the circulation of the cavity of the circulating fluidized bed boiler in the depth peak can be effectively guaranteed. When the carbon dioxide concentration in the circulating flue gas reaches a certain degree, the circular flue gas is carbon capture, and the trapped carbon dioxide is sealed or reused.

[0038] The circulating fluidized bed boiler combustion power generation process is used in the process, and the process is used to combust to the circulating fluidized bed boiler, and the generated steam is used in generator sets; the flue gas generated by the combustion first passes through gas solid separation, and the solid phase is re-entered circulating In the furnace of the fluidized bed boiler, the gas phase is discharged by the chimney after denitration.

[0039] The electrolytic water preferences of the present invention are prepared for preparing hydrogen and oxygen in conventional electrolyte hydrogen production.

[0040] In some embodiments of this embodiment, the waste electricity further includes an inexpensive electricity and / or an inexpensive electric garre when the power supply generated is generated. It is possible to further reduce the cost of electrolytic water hydrogen.

[0041] In some embodiments of this embodiment, partial hydrogen prepared by electrolytic water hydrogen hydrogen unit is used for flue gas denitration treatment. Reduce the cost of the flue gas denitration.

[0042] In some embodiments of this embodiment, a concentrated carbon dioxide in the circulating flue gas is trapped. Can reduce carbon dioxide emissions.

[0043] In one or more embodiments, the captured carbon dioxide is used as a raw material to reactomethane and / or methanol.

[0044] In one or more embodiments, methane is used for flue gas denitration treatment.

[0045] Another embodiment of the present invention provides a system of waste electric hydrogen binding circulating fluidized bed boiler, including electrolytic water hydrogen unit, circulating fluidized bed boiler combustion power generation unit, primary wind mixer and secondary Wind mixer;

[0046] The import of the primary wind mixer is connected to the tail flue. The import of the primary wind mixer also connects the air source and / or oxygen source, and the primary wind mixer exit is connected to the lower part of the lower part of the furnace of the circulating fluidized bed boiler;

[0047] The import of the secondary wind mixer is connected to the tail flue and oxygen source, the secondary wind mixer exit connection circulating fluidized bed boiler in the upper part of the upper portion of the furnace;

[0048] The tail flue is belonging to a circulating fluidized bed boiler combustion power generating unit; the oxygen source belongs to an electrolytic aqueous hydrogen unit; a super-power generation amount when the circulating fluidized bed boiler combustion generating unit depth penders As the electrical energy of the electrolytic water hydrogen unit.

[0049] The circulating fluidized bed boiler combustion power generating unit according to the present invention includes a circulating fluidized bed boiler and a generator set, and the steam generated by circulating fluidized bed boilers is used in generator sets, and the flue gas exit of circulating fluidized bed boiler is connected through the flue connection. The chimney, the flue is sequentially mounted with a high temperature separator, and the denitrifier is sequentially mounted in accordance with the flow of flue gas. The flue between the denitration device and the chimney is the tail flue.

[0050] The electrolytic water hydrogen hydrogen unit according to the present invention includes an electrolytic water hydrogen production device.

[0051] In some embodiments of this embodiment, the inexpensive electricity when the grid is used as the electrolytic water hydrogen unit.

[0052] In some embodiments of this embodiment, there is also included a renewable energy power generating unit, a renewable energy power generating unit generated as an electrolytic water hydrogen cell energy.

[0053] In some embodiments of this embodiment, the hydrogen outlet of the electrolytic water hydrogen hydrogen unit is connected to the reducing gas inlet of the denitration apparatus, which is a circulating fluidized bed boiler combustion power generation unit.

[0054] In some embodiments of this embodiment, an inlet of a carbon capture device and a carbon capture device is connected to the tail. Used to capture carbon dioxide.

[0055] In one or more embodiments, an exit, methane synthesis apparatus and / or methanol synthesis of electrolyte hydrogen hydrogen hydrogen electrolyte hydrogen hydrogen hydrogen hydrogen electrolyte hydrogen hydrogen-hydrogen-hydrogen-hydrogen-hydrogen-based hydrogen-hydrogen-hydrogen-based hydrogen-based hydrogen-based hydrogen-based hydrogen-based hydrogen-based hydrogen-free units include methane synthesis devices and / or methanol synthesis devices, methane synthesis devices and / or methanol synthesis devices. The carbon dioxide inlet of the device is connected to the exit of the carbon capture device.

[0056] In the present invention, the principle of synthesis of methane is a methanation reaction of carbon dioxide, and the main reaction process is carbon dioxide and hydrogen to form methane and water.

[0057] The main reaction process of synthetic methanol in the present invention is carbon dioxide and hydrogen to form methanol and water.

[0058] In one or more embodiments, the methane exit of the methane-based exit is connected to the reducing gas inlet of the denitration apparatus.

[0059] In order to make it possible to understand the technical solution of the present invention more clearly, the technical solutions of the present invention will be described in detail below in conjunction with specific embodiments.

[0060] Example 1

[0061] Process for the combustion fluidized bed boiler combined with waste electricity, such as figure 1 As shown, the electrolytic water hydrogen moiety can utilize the abandoned electricity generated by solar photovoltaic or photothermal power during the day, and electrolyte hydrogen and oxygen are electrolyte hydrogen and oxygen at the time of electric wallet when the grid is used in the evening. Electrolyte hydrogen and oxygen were taken by electrolytic water using the non-upper amount of the unit itself. The prepaid hydrogen is used in a hydrogen fuel cell, a hydrogen-free generator, and other chemical industries. The oxygen obtained by electrolytic water can be used as the secondary wind into the circulating fluidized bed after mixing with the secondary wind mixer and the secondary wind, form an oxidative atmosphere at the upper portion of the furnace, thereby increasing the circulating fluidized bed during depth peak. Burning efficiency of the boiler.

[0062] The cyclic fluidized bed boiler oxygen-enriched burn part is recycled by the partial flue gas of the tail flue, and the circulating flue gas is partially mixed by the primary wind mixer and air (a portion of the volume ratio of circulating flue gas and air is 1: 0.3 ~ 0.5. ), Forming a low oxygen content as a fluidized wind to enter the furnace, so that the lower portion of the furnace is lower, inhibiting nitrogen oxides. Since the flow rate of the primary wind is increased, the fluidization wind speed is improved, and the fluidization of the censored material of the lower portion of the lower portion of the lower part of the furnace during depth peak can be effectively guaranteed. Another part of the cyclic flue gas is mixed by the oxygen mixture with the secondary wind mixer and the electrolytic water (the volume ratio of another part of the circulating flue gas and the oxygen is 0.1 to 0.2: 1) forms a secondary wind from the upper portion of the furnace. The oxidative atmosphere of the upper portion of the furnace is achieved, and the first dual-average oxygen content of the furnace is ranging from 21.2 to 27%, up to 4% by the maximum combustion efficiency of the boiler under deep penders low load. When the carbon dioxide concentration in the circulating flue gas reaches 80 to 90% (measured under dry flue gas), the circulating flue gas is carbonized, and the trapped carbon dioxide is sealed or reused.

[0063] Example 2

[0064] Process for the combustion fluidized bed boiler combined with waste electricity, such as figure 2 As shown, the electrolytic water hydrogen moiety can utilize the abandoned electricity generated by solar photovoltaic or photothermal power during the day, and electrolyte hydrogen and oxygen are electrolyte hydrogen and oxygen at the time of electric wallet when the grid is used in the evening. Electrolyte hydrogen and oxygen were taken by electrolytic water using the non-upper amount of the unit itself. A part of the hydrogen gas was prepared for a hydrogen fuel cell, a hydrogen-free generator, other chemical industry, and another part for flue gas denitration. The oxygen obtained by electrolytic water can be used as the secondary wind into the circulating fluidized bed after mixing with the secondary wind mixer and the secondary wind, form an oxidative atmosphere at the upper portion of the furnace, thereby increasing the circulating fluidized bed during depth peak. Burning efficiency of the boiler.

[0065] The cyclic fluidized bed boiler oxygen-enriched burn part is recycled by the partial flue gas of the tail flue, and the circulating flue gas is partially mixed by the primary wind mixer and air (a portion of the volume ratio of circulating flue gas and air is 1: 0.3 ~ 0.5. ), Forming a low oxygen content as a fluidized wind to enter the furnace, so that the lower portion of the furnace is lower, inhibiting nitrogen oxides. Since the flow rate of the primary wind is increased, the fluidization wind speed is improved, and the fluidization of the censored material of the lower portion of the lower portion of the lower part of the furnace during depth peak can be effectively guaranteed. Another part of the cyclic flue gas is mixed by the oxygen mixture with the secondary wind mixer and the electrolytic water (the volume ratio of another part of the circulating flue gas and the oxygen is 0.1 to 0.2: 1) forms a secondary wind from the upper portion of the furnace. The oxidative atmosphere of the upper portion of the furnace is achieved, and the first dual-average oxygen content of the furnace is ranging from 21.2 to 27%, up to 4% by the maximum combustion efficiency of the boiler under deep penders low load. When the carbon dioxide concentration in the circulating flue gas reaches 80 to 90% (measured under dry flue gas), the circulating flue gas is carbonized, and the trapped carbon dioxide is sealed or reused.