LU501529B1

LU501529B1 - Method for reducing carbon monoxide synthesis gas with high temperature melting heat carrier and carbon dioxide and carbon powder

Info

Publication number: LU501529B1
Application number: LU501529A
Authority: LU
Inventors: Lei Zhang; Tao Sun
Original assignee: Lei Zhang; Tao Sun
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2023-08-21

Abstract

The present invention relates to a method for reducing carbon monoxide synthesis gas with high temperature melting heat carrier and carbon dioxide and carbon powder are used to absorb the sensible and latent heat emitted by the high-temperature heating medium, and the temperature is raised to the reduction temperature and instantly reduced to carbon monoxide high-energy-carrying synthesis gas. The reduction temperature of carbon dioxide and carbon powder should be carried out in the same amount as the phase transition temperature of blast furnace slag, one suction and one discharge. The gas phase carbon dioxide absorbs heat and is reduced to carbon monoxide, and the blast furnace slag releases latent heat from the liquid phase to the solid phase glass body, invented a new path for carbon dioxide sequestration and emission reduction, reduce heat pollution and energy waste caused by natural cooling of high-temperature heating medium products, reduce water pollution and waste caused by water quenching of by-product high-temperature slag and problems affecting the environment.

Description

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LU501529

METHOD FOR REDUCING CARBON MONOXIDE SYNTHESIS GAS

WITH HIGH TEMPERATURE MELTING HEAT CARRIER AND CARBON

DIOXIDE AND CARBON POWDER

TECHNICAL FIELD

[01] The present invention relates to a method for reducing carbon monoxide synthesis gas with high temperature melting heat carrier and carbon dioxide and carbon powder.

BACKGROUND ART

[02] High-temperature molten heat carrier, such as part of the product is naturally cooled to form a solid product, and most of the by-product is quenched and cooled by water, and the basic heat is wasted to form "thermal pollution", causing serious impacts on the environment, water sources, and energy problems. At present, the carbon dioxide involved mainly considers the use of slag low temperature section to absorb carbon dioxide (carbon sequestration) emission reduction, environmental protection and energy saving facilities, and the reaction heat generated when slag and waste gas undergo carbonization reaction. The heat generated is reacted with carbon dioxide and carbon to form carbon monoxide, the carbon dissolution doss reaction reduces carbon dioxide deficiency and the lack of effective utilization of high-temperature high-quality resources above 1000 °C for high-temperature molten heat carrier. In view of the lack of more in-depth research on the basis of our small test on the production of high-content carbon monoxide synthesis gas by injecting carbon powder and carbon dioxide into the molten carbide heat carrier, and the lack of energy conversion in the experiment of reducing carbon monoxide with carbon dioxide and carbon powder in a resistance wire heating fluidized bed is unscientific and not in line with environmental protection and clean production, It is imperative to invent a method for reducing carbon monoxide synthesis gas with high temperature melting heat carrier and carbon dioxide and carbon powder.

SUMMARY

[03] The present invention realizes the staged recovery of heat energy of the high-temperature molten heat carrier, the organic combination of high temperature carbon dioxide reduction to carbon monoxide above 1000°C and strong latent heat of solidification of molten heat carrier and strong exothermic heat transfer realizes carbon dioxide instead of air to circulate heat for high temperature particles. Make full use of the characteristics of carbon dioxide gas volume and high specific heat capacity, reduce the circulation volume of gas volume heat exchange, reduce power consumption and miniaturize equipment. A method for reducing carbon monoxide synthesis gas with high temperature melting heat carrier and carbon dioxide and carbon powder is proposed, which can improve carbon dioxide emission reduction, reduce heat pollution, water

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[04] The technical solution of the present invention is as follows.

[05] A method for reducing carbon monoxide synthesis gas with high temperature melting heat carrier and carbon dioxide and carbon powder, including the following steps: step 1, a system consisting of a high temperature melting heat carrier storage area, a heat radiation area, a granulation phase change area or a reduction area, a high temperature particle cooling area and a particle low temperature cooling area; step 2, circulating heat exchange system including carbon dioxide gas to high temperature cooling zone of pellets; step 3, a purification system including carbon dioxide absorbs the latent heat of phase change of the high-temperature melting heat carrier and is reduced to carbon monoxide gas and passes through the heat radiation zone of the high-temperature melting heat medium, and the purification system 1s the reduction system; step 4, a flow control system; step 5, a heat recovery system generated by the secondary heat exchange.

[06] The present invention in step 1, the high-temperature molten heat carrier is released through the furnace mouth and enters a storage tank as storage area, an upper part of a fan-shaped rainforest tunnel formed in a lower part of the storage tank and a lower part of the storage tank has dozens of small openings connected to an U-shaped pipe with teeth, the high-temperature molten heat carrier is leaked down along the teeth to form beads or columnar fluid and is formed heat radiation to the surrounding space, the high-temperature molten heat carrier collected at the bottom of the tropical rain forest tunnel flows down through the downflow trough and the ventilation pipe, the high-temperature molten heat carrier enters the rotary cup in the granulation space, and when the rotary cup is rotated, the high-temperature molten heat carrier is centrifugally thrown out through the porous, multi-angle, and multi-layered channels on the upper part of the rotary cup, and tiny droplets is formed and to form solid-phase small particles and solid-phase small particle cloud-like spheres after latent heat released, the space occupied by the small particle cloud-like spheres forms the granulation space, the small particles are fallen into the buffer space, and the high temperature small particles are cooled by the circulating carbon dioxide gas, the cooled small particles leave the buffer space and then enter the particle low temperature cooling zone, the water in the boiler tube absorbs the heat of the peripheral small particles to heat up and vaporize to generate steam, and the cooled small particles leave the system through the discharge valve. For finished products such as high-temperature molten calcium carbide formed by the present invention into small balls at room temperature as products, such as blast furnace slag formed by the present invention, the glass body small slag balls are sent to cement production as products.

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[07] The present invention in step 2, the carbon dioxide gas enters the lower part of the buffer space formed by the high temperature cooling zone of the particles tangentially and rotates to absorb the sensible heat of the small particles, most of the carbon dioxide gas after absorbing heat leaves through the pipeline from an inner side of the lower part of the upper opening of the buffer space, the high temperature carbon dioxide gas enters the cyclone separator, and the high temperature carbon dioxide gas then enters the heat exchange boiler and the low temperature heat exchange boiler, the cooled carbon dioxide gas is mixed with the carbon dioxide gas newly entering the system into the circulating booster fan, and the carbon dioxide gas under pressure from the booster fan then enters the lower part of each buffer space through the pipeline to achieve circulating heat exchange and cooling of solid-phase small particles.

[08] The present invention in step 3, part of the carbon dioxide gas entering the granulation space from the upper opening of the buffer space and the injected carbon powder are mixed together and penetrate into the small particle cloud-shaped ball group, carbon dioxide gas and carbon powder continuously absorb heat and heat up to the reduction temperature, and are instantly reduced to carbon monoxide gas, that is, carbon monoxide synthesis gas, that is, carbon monoxide gas, which absorbs the latent heat and sensible heat of phase transition of the high-temperature molten heat carrier, the reduced carbon monoxide gas leaves the small particle cloud-like spheres, leaves the main reduction area of the granulation space and enters the downflow trough and ventilation pipe, and the tropical rain forest tunnel purifies the trace amount of carbon dioxide gas and is reduced to carbon monoxide gas, the purified gas, namely high-purity carbon monoxide synthesis gas, leaves the tropical rain forest tunnel, that is, leaves the reduction system, enters the cyclone separator, and then enters the heat exchange boiler and low-temperature heat exchange boiler, the high-purity carbon monoxide synthesis gas after heat exchange and cooling is led out and pressurized by the induced draft fan, and enters the carbon monoxide gas flow control system and the output pipeline for export.

[09] The present invention in step 4, flow control system: including online detection of carbon dioxide, carbon monoxide, oxygen, and hydrogen content in the exported gas at the outlet of the induced draft fan, converting the carbon dioxide content value into an electrical signal to control the motor revolutions of the induced draft fan, booster fan or electronically controlled valve, that is to control the flow of carbon dioxide gas into the granulation space, and at the same time to control the flow of circulating carbon dioxide gas mixed with the newly entered carbon dioxide gas into the circulating booster fan and the circulating system, and controls the injection flow of each toner and carrier gas, the oxygen content value is converted into an electrical signal to control the induced draft fan, the circulating booster fan, the electronically controlled valve and safe stop and safe start of the system.

[10] The particles in the tube space of the waste heat boiler formed by the low temperature cooling zone of the particles are in contact with the tube wall to transfer heat, so that the water in the tube absorbs heat to heat up and vaporize to generate steam, the high-temperature circulating carbon dioxide gas formed in the high-temperature cooling zone of the pellets enters the heat-exchange boiler and the low-temperature

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LU501529 heat-exchange boiler, and indirectly transfers heat to the water in the boiler tubes and also produces steam, the high-purity carbon monoxide synthesis gas leaving the reduction system enters the heat exchange boiler and the low temperature heat exchange boiler, and indirectly transfers heat to the water in the boiler tubes and also produces steam, that is, the heat recovery system generated by the secondary heat exchange.

Three-phase heat recovery is exported in the form of water vapor, or high temperature carbon dioxide gas and high temperature carbon monoxide gas are used for other secondary heat exchange, such as hot air.

[11] Raw materials involved in the present invention: high temperature melting heat carrier refers to blast furnace slag, converter slag, electric furnace slag, continuous casting and rolling steel water, submerged arc furnace products and by-products, calcium carbide furnace products high temperature molten calcium carbide, yellow phosphorus furnace by-product slag, molten ferrosilicon, molten ferromanganese, molten ferrochromium, molten tungsten, molten silicon-manganese alloy and other molten iron alloys. Carbon dioxide gas refers to the carbon dioxide gas mixture emitted from iron and steel metallurgy, burning lime kiln, coal burning, chemical industry, medicine, and fermentation, or carbon dioxide gas with a higher content after enrichment. Injected carbon powder is made of metallurgical coke or coke powder, burning coal, low-rank coal, organic solid waste, plastics, tires, and carbon-containing materials, which are ground into carbon powder, that is, carbon powder, using carbon dioxide or carbon monoxide gas as carrier gas to spray carbon powder, and into the buffer space, the reduction reaction system, namely the granulation space, the downflow trough, the ventilation pipe space and the tropical rain forest tunnel space respectively.

The steam water involved is the preferred grade of softening boiler water.

[12] The process equipment involved in the high-temperature molten heat carrier storage tank, tropical rain forest tunnel, lower chute and ventilation pipeline, granulation space, and buffer space of the present invention is mainly composed of a closed carbon steel shell lined with an anti-expansion layer, a thermal insulation layer and a heat and corrosion resistant layer.

[13] The effects of the present invention are explained as follows.

[14] The present invention relates to a method for reducing carbon monoxide synthesis gas with high temperature melting heat carrier and carbon dioxide and carbon powder are used to absorb the sensible and latent heat emitted by the high-temperature heating medium, and the temperature is raised to the reduction temperature and instantly reduced to carbon monoxide high-energy-carrying synthesis gas. The reduction temperature of carbon dioxide and carbon powder should be carried out in the same amount as the phase transition temperature of blast furnace slag, one suction and one discharge. The gas phase carbon dioxide absorbs heat and is reduced to carbon monoxide, and the blast furnace slag releases latent heat from the liquid phase to the solid phase glass body, invented a new path for carbon dioxide sequestration and emission reduction, reduce heat pollution and energy waste caused by natural cooling of high-temperature heating medium products, reduce water pollution and waste caused by water quenching of by-product high-temperature slag and problems affecting the environment.

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BRIEF DESCRIPTION OF THE DRAWINGS

[15] FIG 1 is a schematic cross-sectional view of a process equipment.

[16] FIG 2 is a schematic top plan cross-sectional view of the process equipment. 5 [17] FIG 3 is a schematic cross-sectional top view at A-A direction of the process equipment.

[18] FIG 4 is a schematic cross-sectional top view at B-B direction of the process equipment.

[19] FIG 5 is a schematic cross-sectional view of a rotary cup and a transmission device of the process equipment.

[20] FIG 6 is a schematic top view of the rotating cup with an opening.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[21] The present invention is further described in detail with reference to accompanying drawings as follows. Referring to FIGS.1-6: 1. slag ditch; 2. storage tank; 3. deluge distribution trough; 4. tropical deluge tunnel; 5. tropical deluge tunnel carbon powder blowing pipe port; 6. downflow trough and vent pipe; 7. downflow trough and vent pipe carbon powder blowing pipe port 8. rotary granulation space; 9. granulation rotary cup; 10. rotary granulation space carbon powder blowing pipe port; 11. gas circulation pipe from buffer space; 12. buffer space; 13. waste heat boiler steam drum; 14. carbon powder powder blowing pipe port in buffer space; 15. waste heat boiler pipe space; 16. waste heat boiler water supply package; 17. solid phase blanking valve; 18. circulating booster fan outlet pipe; 19. cyclone separator II; 20. heat exchange boiler II, 21. low temperature heat exchange boiler II; 22. induced draft fan; 23. flow control system; 24 cyclone separator I, 25. heat exchange boiler I; 26. low temperature heat exchange boiler I, 27. carbon dioxide gas entering system pipeline; 28. circulating booster fan; 29. solid phase packaging; 30. multi-layer, multi-angle, centrifugal holes; 31. anti-expansion layer, heat insulation layer, and anti-corrosion layer at the bottom of the granulation space; 32. rotation cup maintenance hole; 33. maintenance hole sealing flange blind plate; 34. rotary shaft seal member; 35. rotary shaft; 36. gearbox; 37. motor; 38. high temperature circulating carbon dioxide gas outlet pipe; 39. maintenance hole anti-expansion layer, heat insulation layer, anti-corrosion layer; 40. bearing sealed outer steel shell; 41. cooling gas pipeline; 42. buffer space water vapor jacket.

[22] Using high-temperature melting heat carrier (take blast furnace slag as an example) to supply carbon dioxide gas and carbon powder to heat to a high-temperature gas phase with a reduction reaction temperature above 900 °C to 1250 °C, and instantaneously strong endothermic reduction to carbon monoxide syngas. Nitrogen (or other inert gas) is blown into the gap between the tubes of the waste heat boiler below the buffer space to indirectly absorb heat and dredge the granular solid heat carrier of the tube gap, that is, a nitrogen seal is formed to separate the buffer space, and at the same time, a large amount of circulating carbon dioxide and an equal amount of carbon powder are added to the buffer space, In this buffer space, a large amount of carbon dioxide gas absorbs heat and leaves the buffer place due to the granular heat carrier (granular heat carrier temperature about 1050°C in and =800°C out) in the granulation

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LU501529 space. À small amount of carbon dioxide and carbon powder are reduced to carbon monoxide (the buffer space is catchy, and the conversion rate 1s low), a part of carbon dioxide gas (controlled gas) enters the rotary granulation space through the upper opening of the buffer space. The rotary granulation space is also equipped with the injection of carbon powder. carbon powder and carbon dioxide have the same temperature rise and penetrate into the three-dimensional heat-carrying small particle cloud-shaped ball group formed by the rotary granulation ($1300°C to 1000°C). Carbon dioxide and carbon powder are instantly reduced to carbon monoxide (conversion rate 80-90%), and the latent heat of phase transition of small particles at high temperature is lost, and the vitreous (glass-ceramic) solid phase is instantly formed, and the gas rises along the rotating granulation space to the downflow trough and upper space of the ventilation pipe, and enter the tropical rain tunnel (£1500°C to 1300°C), the tropical rain tunnel also has carbon powder injection, and a small amount carbon dioxide and carbon powder in the rising gas are instantly reduced to carbon monoxide. At this time, the carbon dioxide content in the gas is close to a trace amount of less than 1%. The system gas leaves the tropical deluge tunnel to a gas cyclone separator II, a heat exchange boiler IT and a low temperature heat exchange boiler II, and then enters an induced draft fan and a flow control system. The flow control system controls the gas flow from the upper port of the buffer space into the granulation space and the subsequent reduction system, and at the same time controls the flow of the circulating carbon dioxide gas and the newly entered carbon dioxide gas into the circulation system of the booster fan, and controls the injection flow of each toner and carrier gas. The flow control system includes a gas outlet online detection of carbon dioxide gas content and oxygen content (safety factor), the carbon dioxide gas content and oxygen content are converted into electrical signals to control the motor revolutions of the induced draft fan, booster fan or electronically controlled valve, and control the gas flow of the system when the flow control system is turned on and off.

Claims

BL-5424 LU501529 CLAIMS

1. A method for reducing carbon monoxide synthesis gas with high temperature melting heat carrier and carbon dioxide and carbon powder, comprising the following steps: step 1, a system consisting of a high temperature melting heat carrier storage area, a heat radiation area, a granulation phase change area or a reduction area, a high temperature particle cooling area and a particle low temperature cooling area; step 2, circulating heat exchange system comprising carbon dioxide gas to high temperature cooling zone of pellets; step 3, a purification system comprising carbon dioxide absorbs the latent heat of phase change of the high-temperature melting heat carrier and is reduced to carbon monoxide gas and passes through the heat radiation zone of the high-temperature melting heat medium, and the purification system is the reduction system; step 4, a flow control system; step 5, a heat recovery system generated by the secondary heat exchange.

2. The method according to claim 1, wherein in step 1, the high-temperature molten heat carrier is released through the furnace mouth and enters a storage tank as storage area, an upper part of a fan-shaped rainforest tunnel formed in a lower part of the storage tank and a lower part of the storage tank has dozens of small openings connected to an U-shaped pipe with teeth, the high-temperature molten heat carrier is leaked down along the teeth to form beads or columnar fluid and is formed heat radiation to the surrounding space, the high-temperature molten heat carrier collected at the bottom of the tropical rain forest tunnel flows down through the downflow trough and the ventilation pipe, the high-temperature molten heat carrier enters the rotary cup in the granulation space, and when the rotary cup is rotated, the high-temperature molten heat carrier is centrifugally thrown out through the porous, multi-angle, and multi-layered channels on the upper part of the rotary cup, and tiny droplets is formed and to form solid-phase small particles and solid-phase small particle cloud-like spheres after latent heat released, the space occupied by the small particle cloud-like spheres forms the granulation space, the small particles are fallen into the buffer space, and the

BL-5424 LU501529 high temperature small particles are cooled by the circulating carbon dioxide gas, the cooled small particles leave the buffer space and then enter the particle low temperature cooling zone, the water in the boiler tube absorbs the heat of the peripheral small particles to heat up and vaporize to generate steam, and the cooled small particles leave the system through the discharge valve.