Device for carrying out glass low-carbon green manufacturing by taking biological heavy oil as fuel power

Abstract

The utility model relates to a device for low-carbon green manufacturing of glass by taking biological heavy oil as fuel power. Comprising a membrane emulsification system for producing a biological heavy oil W / O emulsion; the kiln system is used for realizing glass production by utilizing the biological heavy oil W / O emulsion; the medium-concentration product membrane separation system is used for capturing CO2 in flue gas produced in the glass production process at a time, part of produced medium-concentration CO2 product gas flows into the biological carbon sequestration system, and the other part of the produced medium-concentration CO2 product gas flows into the compensation type-high-concentration product membrane separation system after being pressurized; the biological carbon sequestration system is used for immobilizing and utilizing CO2 obtained by the medium-concentration product membrane separation system; and the compensation type-high-concentration product membrane separation system is used for carrying out secondary trapping and concentration on the medium-concentration CO2 product gas, and the produced high-concentration CO2 product gas is recycled to the membrane emulsification system.

Description

Technical Field

[0001] This utility model relates to the field of chemical engineering technology, specifically to a device for low-carbon and green glass manufacturing using bio-heavy oil as fuel. Background Technology

[0002] The glass manufacturing process generates significant carbon emissions, as its melting process typically requires high temperatures of 1500–1600°C. Current processes usually employ fossil fuels for heating to melt glass raw materials. Common fossil fuels include natural gas, coal tar, coke oven gas, producer gas, and petroleum coke. The combustion of these fuels produces large amounts of CO2, resulting in the melting process accounting for over 60% of the total carbon emissions from the entire process.

[0003] Biomass heavy oil is an environmentally friendly fuel. Its carbon source belongs to the biomass-atmosphere carbon exchange cycle system, thus it does not increase the total amount of CO2 in the atmosphere. Meanwhile, biomass heavy oil has a sulfur content of less than 0.05%, and although its calorific value (32-40 MJ / kg) is slightly lower than ordinary 0# diesel (43 MJ / kg), its oxygen content can reach 11%, resulting in more complete combustion, less exhaust smoke, and excellent combustion performance. Combining existing processes with the resource utilization of this biomass oil can replace or partially replace traditional fossil fuels, helping to achieve zero-carbon emissions in glass manufacturing processes.

[0004] However, bio-heavy oil suffers from high viscosity, making it difficult to transport and atomize. Furthermore, its high salt content can easily cause equipment and pipeline blockage and corrosion if used directly. Pretreatment is necessary for its large-scale application. Related research indicates that emulsifying bio-heavy oil can not only reduce its viscosity but also improve its combustion efficiency based on the micro-explosion effect of the emulsion, significantly improving the oil's combustibility. Therefore, if a bio-heavy oil emulsion with controllable particle size can be prepared through optimized emulsification processes, it holds promise for restructuring the energy supply of the glass manufacturing industry.

[0005] Furthermore, the high-temperature flue gas generated during glass manufacturing typically contains large amounts of CO2 and N2. If this flue gas is directly released into the atmosphere without further treatment, it will continuously exacerbate the greenhouse effect. Therefore, it is essential to capture CO2 from the flue gas. Membrane separation technology is commonly used to recover CO2 from flue gas because it is not subject to thermodynamic equilibrium.

[0006] Furthermore, to improve economic efficiency and achieve carbon reduction or even "carbon-negative" operation in the glass manufacturing process, in addition to capturing CO2 from flue gas, the captured CO2 should be further functionalized. Related research indicates that using slow-release tablets for submerged plant growth can slowly, stably, and persistently release plant hormones and inorganic carbon sources at the bottom of the water, synergistically enhancing the growth of submerged plants and improving seedling survival rates. However, this method poses ecological safety risks and requires long-term use, thus its economic viability needs improvement. As an alternative, using CO2 to promote the growth of aquatic organisms is a more ideal solution. Photosynthesis by plants and microalgae is an effective way to utilize CO2. Cultivating aquatic organisms in water bodies can achieve biological carbon sequestration and produce high-value-added products through biological metabolism. Moreover, biomass is the only renewable carbon source, belonging to zero-emission CO2 technology, which aligns with the green and low-carbon development concept and the requirements of clean development mechanisms, and its price is lower than fossil fuels. This provides a highly feasible and promising application for CO2 captured from the glass manufacturing process.

[0007] In conclusion, the existing glass manufacturing industry has a huge amount of carbon emissions in its production process, especially in the glass melting stage. Therefore, energy restructuring based on biofuel and combined with emulsification and aquatic biomass enrichment technologies to restructure the glass production process into a low-carbon one has a feasible and realistic basis and may achieve effective carbon reduction in the glass industry. Summary of the Invention

[0008] The purpose of this invention is to solve the problems existing in the prior art and provide a device and method for achieving low-carbon and green glass manufacturing using bio-heavy oil as fuel. By selecting bio-heavy oil emulsion to replace or partially replace existing fossil fuels, carbon emissions during the glass melting stage are reduced. At the same time, CO2 emissions are greatly reduced by effectively capturing and utilizing CO2 in the flue gas after combustion.

[0009] To achieve the above-mentioned technical objectives, this utility model is implemented through the following technical solution:

[0010] A device for low-carbon and green glass manufacturing using bio-heavy oil as fuel is characterized by comprising: a membrane emulsification system, a kiln system, a medium-concentration product membrane separation system, a bio-carbon fixation system, and a compensated-high-concentration product membrane separation system.

[0011] The membrane emulsification system includes a CO2 aeration pressurization tank, a pressure membrane tank, a high-temperature sedimentation demulsification device, and a membrane jet emulsification device connected in sequence, and is used to produce bio-heavy oil W / O emulsions.

[0012] The kiln system includes a glass production furnace connected to the outlet of the membrane jet emulsification device, which uses bio-heavy oil W / O emulsion as fuel; the kiln system also includes a dust removal, desulfurization and denitrification assembly connected to the flue gas outlet of the glass production furnace, and a cooling and pressurization assembly connected to the outlet of the dust removal, desulfurization and denitrification assembly.

[0013] The medium-concentration product membrane separation system includes a membrane separation trapping device I, the inlet of which is connected to the outlet of the cooling and pressurizing assembly; the permeate outlet of the membrane separation trapping device I is divided into two paths, the first path being connected to the biological carbon fixation system and the second path being connected to the pressurizing assembly.

[0014] The biological carbon fixation system includes an aquatic biological carbon fixation tank and a gas distributor. The gas distributor is installed in the aquatic biological carbon fixation tank and connected to the first permeate gas outlet of the membrane separation and collection device I.

[0015] The compensated high-concentration product membrane separation system includes a membrane separation trapping device II, the inlet of which is connected to the outlet of the pressurization component; the high-concentration CO2 product gas outlet of the membrane separation trapping device II is connected to the CO2 aeration pressurization tank of the membrane emulsification system for recycling high-concentration CO2 back to the membrane emulsification system; and the residual gas outlet of the membrane separation trapping device II is connected to the aquatic biological carbon sequestration tank of the biological carbon sequestration system.

[0016] The membrane tubes of the membrane emulsification system are made of ceramic or metal, and the membrane pore size is 50~2000 nm.

[0017] The kiln system also includes a raw material tank, a forming annealing assembly, and a low-carbon glass product storage tank; the raw material tank is connected to the glass production furnace and is used to transport glass preparation raw materials to the furnace; the product outlet of the glass production furnace is connected to the forming annealing assembly, and the forming annealing assembly is connected to the low-carbon glass product storage tank.

[0018] The medium-concentration product membrane separation system also includes a pressure potential energy recovery device I, and the residual gas outlet of the membrane separation and trapping device I is connected to the pressure potential energy recovery device I; the gas separation membrane used in the membrane separation and trapping device I is a membrane material that preferentially permeates CO2 gas, and the CO2 / N2 selectivity of the membrane is not less than 7.

[0019] The compensated-high-concentration product membrane separation system also includes a pressure potential energy recovery device II. The permeate outlet of the membrane separation trapping device II is connected to the biological carbon fixation system through the pressure potential energy recovery device II. The CO2 / N2 selectivity of the membrane material used in the membrane separation trapping device II is 20-60.

[0020] The process of using the above-mentioned low-carbon and green glass manufacturing unit powered by bio-heavy oil for glass production, CO2 capture, and cascade utilization is as follows:

[0021] 1) Using bio-heavy oil as the continuous phase, deionized water is introduced into a CO2 aeration pressurization tank, and saturated carbonic acid generated under CO2 aeration pressure is used as the dispersed phase. Water is used as the emulsifier. In a pressure membrane tank, the dispersed phase enters the continuous phase through the membrane pores under CO2 gas pressure, and the CO2 gas reacts fully with the impurities in the bio-heavy oil. In a high-temperature sedimentation and demulsification device, the generated salts are removed by high-temperature static sedimentation and demulsification, thus achieving the purification of bio-heavy oil.

[0022] 2) Take the purified upper layer oil and put it into the membrane jet emulsification device. Use deionized water as the dispersed phase and water as the emulsifier. After membrane jet emulsification, a bio-heavy oil W / O emulsion is formed.

[0023] 3) Using bio-heavy oil W / O emulsion as fuel to supply heat to glass production furnaces and kilns, combined with the use of conventional diesel to complete the start-up process, the generated flue gas is filtered and treated by dust removal, desulfurization and denitrification components and then sent to cooling and pressurization components for cooling and pressurization.

[0024] 4) The treated flue gas is used as the feed gas for the medium-concentration product membrane separation system. It is concentrated once by the membrane separation and collection device I to produce medium-concentration CO2 product gas. Part of the medium-concentration CO2 product gas flows into the biological carbon fixation system, and part flows into the compensated high-concentration product membrane separation system after being pressurized by the pressurization component. The residual gas I recovers the pressure potential energy using the pressure potential energy recovery device I.

[0025] 5) The medium-concentration CO2 product gas leading to the biological carbon fixation system is transported into the water body. The gas membrane dispersion CO2 supply system ensures that the CO2 bubbles are uniform, allowing CO2 to fully contact with aquatic organisms in the water body, and then combine with biological metabolic processes to produce high value-added products. In addition, based on the CO2 photocatalytic mediating material laid in the water body, in conjunction with aquatic organism capacity enhancement technology, CO2 fixation and utilization are realized.

[0026] 6) The medium-concentration CO2 product gas introduced into the compensated high-concentration product membrane separation system is further concentrated by the membrane separation and collection device II to obtain high-concentration CO2 product gas. Part of the high-concentration CO2 product gas is recycled to the membrane emulsification system, and part is used to compensate for the energy consumption generated by the compressor during the collection process of the medium-concentration product membrane separation system. The residual gas II generated by the system is transported to the biological carbon fixation system after the pressure potential energy is recovered by the pressure potential energy recovery device II. Beneficial effects

[0027] 1. This application uses waste bio-heavy oil as raw material and saturated carbonic acid formed by deionized water under CO2 aeration pressure as the dispersed phase. After high-temperature static sedimentation and demulsification, the generated salts are removed to purify the bio-heavy oil. Then, water is used as an emulsifier, and membrane jet emulsification technology is used to emulsify the bio-heavy oil to prepare a bio-heavy oil W / O emulsion with controllable particle size. After emulsification, the viscosity of the oil can be reduced to facilitate transportation. At the same time, the micro-explosion effect of the emulsion can be used to achieve full atomization of the bio-heavy oil, which is conducive to combustion. This can achieve efficient heating of glass furnaces, thereby replacing or partially replacing fossil fuels and achieving the goal of reducing carbon emissions from the source.

[0028] 2. This application combines conventional heat exchange and compression technology to pretreat the high-temperature flue gas discharged from the glass furnace. Then, it uses a membrane material that preferentially permeates CO2 to enrich and concentrate the CO2 in the flue gas in one step. The residual gas I is discharged back to the atmosphere after recovering the pressure potential energy, thereby achieving effective capture of CO2 generated during the glass manufacturing process.

[0029] 3. This application uses an induced draft fan to transport the medium-concentration CO2 product gas captured by the medium-concentration product membrane separation system to the gas distributor of the biological carbon fixation system. While stirring the water, CO2 bubbles are uniformly introduced to solve the problem of low CO2 solubility in the water. The preferred CO2 bubble particle size is 10 nm to 5 μm to increase the CO2 concentration in the water. Then, by laying photocatalytic mediating materials, the aquatic ecosystem is regulated, so that the aquatic ecology develops in a better way. CO2 comes into full contact with aquatic organisms in the water, and then combines with biological metabolic processes to produce high-value-added products, improve the efficiency of biological carbon fixation, realize the fixation and utilization of CO2, thereby solving the problem of CO2 gas resource utilization and providing technical support for the efficient treatment of CO2.

[0030] 4. In this application, a portion of the medium-concentration CO2 product gas captured by the medium-concentration product membrane separation system is sent to a compensated high-concentration product membrane separation system for secondary concentration. The high-concentration CO2 product gas produced can be used partly to offset the energy consumption cost of the medium-concentration product membrane separation system and partly recycled to the membrane emulsification system. The residual gas II is sent to a turbine to recover pressure potential energy and then sent to a biological carbon fixation system for multi-stage utilization. This not only forms a multi-functional CO2 cascade utilization process but also further reduces environmental carbon emissions.

[0031] 5. This application restructures low-carbon processes from multiple dimensions, including energy structure adjustment, carbon capture, carbon sequestration, and carbon utilization, providing a new solution for carbon emission reduction in the energy-intensive glass manufacturing industry. Its combined use of membrane emulsification, membrane separation technology, and photo-driven aquatic biological carbon sequestration technology enables efficient utilization of water quality treatment and biological heavy oil resources. It has a feasible and practical basis, can achieve efficient carbon reduction in the glass industry, and has broad application prospects. Attached Figure Description

[0032] Figure 1 A process flow diagram for achieving low-carbon and green glass manufacturing using bio-heavy oil as fuel;

[0033] Among them, A-kiln system, B-membrane emulsification system, C-medium concentration product membrane separation system, D-biological carbon fixation system, and E-compensation-high concentration product membrane separation system;

[0034] 1-Raw material tank, 2-Glass production furnace, 3-Dust removal, desulfurization and denitrification components, 4-Cooling and pressurizing components, 5-Forming and annealing components, 6-Low carbon glass product storage tank;

[0035] 7-Deionized water, 8-CO2 aeration and pressurization tank, 9-Pressure membrane tank, 10-High temperature sedimentation and demulsification device, 11-Membrane jet emulsification device;

[0036] 12-Membrane separation and collection device I, 13-Permeate gas I, 14-Pressure potential energy recovery device I, 15-Condensate, 16-Exhaust gas venting;

[0037] 17-Aquatic biological carbon fixation tank; 18-Gas distributor; 19-High value-added product; 20-CO2 photocatalytic mediator material;

[0038] 21-Pressure component, 22-Membrane separation and capture device II, 23-High concentration CO2 product gas, 24-Permeate gas II, 25-Pressure potential energy recovery device II, 22-Multi-stage utilization of permeate gas II;

[0039] Figure 2 This application discloses the trend of economic value changes for the low-carbon green manufacturing scheme for glass, calculated using EU and domestic standards. Detailed Implementation

[0040] The following embodiments further illustrate the content of this utility model, but should not be construed as limiting the utility model. Any modifications and substitutions made to the methods, steps, or conditions of this utility model without departing from its essence are within the scope of this utility model. Example

[0041] To address the issues of high energy consumption and large carbon emissions in existing glass manufacturing processes, this application proposes a device for low-carbon and green glass manufacturing that uses bio-heavy oil as fuel. This device restructures the process from multiple dimensions, including energy structure adjustment, carbon capture, carbon sequestration, and carbon utilization, and utilizes bio-heavy oil as fuel.

[0042] The device includes a kiln system, a membrane emulsification system, a medium-concentration product membrane separation system, a biological carbon fixation system, and a compensated-high-concentration product membrane separation system. The medium-concentration product membrane separation system, the compensated-high-concentration product membrane separation system, the biological carbon fixation system, and the membrane emulsification system are subsystems of each other, forming a complementary multi-functional cascade utilization process for CO2.

[0043] The furnace system utilizes bio-heavy oil W / O emulsion prepared by a membrane emulsification system to achieve low-carbon and green glass production. The system includes a glass production furnace 2, a raw material tank 1, and a low-carbon glass product storage tank 6. The glass production raw materials in the raw material tank 1 are fed into the glass production furnace 2. The bio-heavy oil W / O emulsion prepared by the membrane emulsification system is used as fuel, combined with conventional diesel fuel, to complete the start-up process, achieving efficient and stable heating of the glass production furnace 2. The furnace products are annealed by the forming annealing assembly 5 and then formed. The resulting glass products are stored in the low-carbon glass product storage tank 6. The high-temperature flue gas generated during the glass production furnace 2 process is filtered and treated by the dust removal, desulfurization, and denitrification assembly 3 before being sent to the cooling and pressurization assembly 4 for further treatment. Specifically, it is introduced into a heat exchanger by an induced draft fan for cooling, and then pressurized and dehydrated by a compressor. The cold source for heat exchange, cooling, and pressurization is pure water or cold brine. The pressure of the treated gas is 0.5-0.8 liters per second. MPaG, at a temperature of 15-25℃, the treated flue gas is used as the feed gas for the medium-concentration product membrane separation system.

[0044] The membrane emulsification system is used to emulsify bio-heavy oil, reduce oil viscosity, and fully atomize the bio-heavy oil to replace or partially replace fossil fuels, thereby reducing carbon emissions at the source. It includes a CO2 aeration pressurization tank 8, a pressure membrane tank 9, a high-temperature settling and demulsification device 10, and a membrane jet emulsification device 11. Deionized water is introduced into the CO2 aeration pressurization tank 8, where it forms saturated carbonic acid under CO2 aeration pressure. This saturated carbonic acid is then used as the dispersed phase and fed into the pressure membrane tank 9. Bio-heavy oil is introduced into the pressure membrane tank 9 as the continuous oil phase. Under CO2 gas pressure, the dispersed phase passes through the membrane pores into the continuous oil phase, allowing CO2 to fully react with impurities in the bio-heavy oil. Then, in the high-temperature settling and demulsification device 10, high-temperature static settling and demulsification remove the generated salts, thus purifying the heavy oil. The purified upper layer oil is fed into the membrane jet emulsification device 11. Water is used as an emulsifier and is added at a ratio of 3-10% of the bio-heavy oil mass. After membrane jet emulsification, a bio-heavy oil W / O emulsion with controllable emulsion particle size is formed, which reduces the viscosity of bio-heavy oil, improves fluidity and atomization performance, and achieves effective atomization of bio-heavy oil.

[0045] Demulsification in membrane emulsification is performed using an ultrasonic demulsifier or a static stratification tank. The emulsification process is based on membrane jet emulsification technology. The temperature of the bio-heavy oil emulsion is 90-160℃. The membrane tube of the membrane emulsification system is made of ceramic or metal with a pore size of 50-2000 nm, preferably 100-600 nm; the emulsion droplet size is between 2 μm and 50 μm.

[0046] The finished emulsion is transported to the furnace system as a combustion power source. The emulsion improves the dispersibility of bio-heavy oil droplets. Based on its micro-explosion effect, it can improve the combustion efficiency of bio-heavy oil and achieve efficient and stable heating for glass furnaces.

[0047] The medium-concentration product membrane separation system is used to capture CO2 from flue gas. It includes a membrane separation capture device I and a pressure potential energy recovery device I. The feed gas input from the furnace system undergoes membrane separation treatment in the membrane separation capture device I 12 to obtain medium-concentration CO2 product gas. The gas separation membrane used in the membrane separation capture device I 12 is a membrane material that preferentially permeates CO2 gas, with a CO2 / N2 selectivity of not less than 7, an operating temperature not exceeding 50℃, and an operating pressure of 0.1-1.2 MPaG. After treatment by the membrane separation capture device I 12, the CO2 concentration in the feed gas is increased by 20-70% or more, and the recovery rate is between 30-70%. A portion of the captured medium-concentration CO2 product gas flows into the biological carbon fixation system, and another portion, after being pressurized by the pressurization component 21, flows into the compensated-high-concentration product membrane separation system for further treatment. The generated residual gas I is used to recover pressure potential energy through pressure potential energy recovery device I. The pressure potential energy is then recovered by entering the turbine to generate electricity and compensate for the energy consumption of the compressor in the trapping device. After the potential energy is recovered, the exhaust gas is discharged.

[0048] A biological carbon fixation system is used to produce high-value-added products through the metabolism of aquatic organisms. It combines CO2 photocatalytic mediators with aquatic biological capacity-enhancing technology to achieve CO2 fixation and utilization. The system includes an aquatic biological carbon fixation tank 17 and a gas distributor 18. Medium-concentration CO2 product gas flowing from a medium-concentration product membrane separation system is used as the gas source and is transported to the water body within the aquatic biological carbon fixation tank 17 by an induced draft fan. The gas distributor 18 disperses the gas, and the introduction of CO2 is accompanied by water agitation, ensuring sufficient contact between the gas source and the aquatic organisms in the tank. This, combined with the biological metabolic process, produces high-value-added products 19. Preferably, the concentration is 0.5~1 g. 生物干重 / L 水体 Density planting, and 4×10 -9 ~8×10 -9 m 3 / s / g 生物干重CO2 is introduced, and the CO2 bubble particle size distribution ranges from 10 nm to 5 μm. Furthermore, CO2 photocatalytic mediator material 20 (preferably TiO2-based photocatalytic mediator material) is laid in the water body, in conjunction with aquatic biological enrichment technology, to achieve CO2 fixation and utilization.

[0049] A compensated-high-concentration product membrane separation system is used to re-capture and concentrate medium-concentration CO2 product gas to produce high-concentration CO2 product gas 23. This system includes a membrane separation and capture device II 22 and a pressure potential energy recovery device II 25. A portion of the medium-concentration CO2 product gas, after pressurization, flows into the membrane separation and capture device II for further concentration via membrane separation. The membrane material used in the membrane separation and capture device II has a CO2 / N2 selectivity of 20-60, an operating temperature of 30-200℃, and an operating pressure of 0.1-1.2 MPaG. After treatment, the CO2 enriched gas is concentrated to over 80-95%, with a recovery rate between 40-80%. The produced high-concentration CO2 product gas 23 is partially reused in the membrane emulsification system for CO2 aeration and pressurization. The residual gas II, after pressure potential energy recovery via the pressure potential energy recovery device II (turbine), is transported to the water body of the biological carbon fixation system, achieving multi-stage utilization of the residual gas II, further reducing CO2 environmental emissions and improving process value.

[0050] The medium-concentration product membrane separation system and the compensated-high-concentration product membrane separation system are complementary processing systems. The high-concentration CO2 product gas captured by the compensated-high-concentration product membrane separation system is used to compensate for the energy consumption generated by the compressor during the capture process of the medium-concentration product membrane separation system, and is recycled to the membrane emulsification system, further reducing the cost of the capture process of the medium-concentration product membrane separation system and realizing the cascade utilization of CO2.

[0051] Comparative Example 1

[0052] (1) Natural gas is used as fuel to heat the glass furnace, and the furnace melting temperature is 1500~1600℃. Assuming that the natural gas intake is 2765 Nm³ under normal production conditions for glass preparation, the furnace is heated. 3 / h (1.96 ton / h), after being mixed with air and burned, produces a mixture gas with a calorific value of 1.00 × 10⁻⁶ ton / h. 5 MJ / h. After heat exchange between the kiln and the steam drum, the by-product steam output is 3.343 ton / h, and the temperature of the mixed gas in the kiln drops to 400℃.

[0053] (2) After the mixed gas undergoes electrostatic dust removal, desulfurization, denitrification, and cooling processes, the temperature is approximately 200℃. It is then transported to the chimney via an induced draft fan, generating 34945 Nm³ of gas. 3The flue gas produced is 16.7 tons / hour, of which CO2 accounts for about 8.3%. It is directly discharged into the atmosphere, with a CO2 emission of 5.496 tons / hour. The glass product production capacity is 16.7 tons / hour. If this process is used for production, the CO2 emission into the environment is 4.478 tons / ton (glass).

[0054] Application Example 1

[0055] (1) Using bio-heavy oil as the continuous phase, deionized water is introduced into the CO2 aeration pressurization tank, and saturated carbonic acid generated under CO2 aeration pressure is used as the dispersed phase. Water is used as the emulsifier. In the pressure membrane tank, the dispersed phase enters the continuous phase through the membrane pores under CO2 gas pressure, and the CO2 gas reacts fully with the impurities of the bio-heavy oil. In the high-temperature sedimentation and demulsification device, the generated salts are removed by high-temperature static sedimentation and demulsification, thus realizing the purification of bio-heavy oil.

[0056] 2) The purified upper layer oil is put into a membrane jet emulsification device, with deionized water as the dispersed phase and water as the emulsifier. After membrane jet emulsification, a bio-heavy oil W / O emulsion is formed. The bio-heavy oil emulsification temperature is 90-160℃, and water-in-oil emulsified bio-heavy oil is prepared with a droplet size of less than 10 µm and a droplet water content of about 5%.

[0057] 3) Using bio-heavy oil emulsion to replace natural gas, and ordinary diesel as a starting and combustion aid, the bio-heavy oil is used as fuel to heat the glass furnace. The melting temperature is 1500~1600℃, which is equivalent to the heat generated by burning natural gas (1.00×10⁻⁶). 5 At a demand of MJ / h, 2.50 ton / h of bio-heavy oil is required. Based on the law of conservation of elements, the bio-heavy oil can produce approximately 7.084 ton / h of CO2 and 43959 Nm³ of CO₂. 3 The flue gas output is 3.343 tons / hour, the by-product steam output is 3.343 tons / hour, and the temperature of the mixed gas in the kiln drops to 400℃.

[0058] 4) After being treated by dust removal, desulfurization, and denitrification processes, the high-temperature flue gas is transported by an induced draft fan to a water-cooled heat exchanger and compressor for cooling, dehydration, and pressurization (compressor power is 3892 kW), pressure is 0.5-0.8 MPaG, and temperature is about 25℃. It is then used as feed gas to enter the medium-concentration product membrane separation system, where CO2 is enriched and concentrated on the permeate side, with a concentration of not less than 2 times and a CO2 recovery rate of 30%-70%. The residual gas I is recovered by a turbine (power is 1133 kW) and transported back to the chimney for exhaust through pipeline.

[0059] (4) The medium-concentration CO2 product gas collected by the medium-concentration product membrane separation system is transported to the membrane dispersion gas distributor of the biological carbon fixation system by the blower. CO2 is uniformly introduced while stirring the water to increase the CO2 concentration in the water. The CO2 bubble particle size range is controlled to be 10 nm~5 μm. By laying CO2 photocatalytic mediating materials and raising aquatic organisms, the CO2 utilization rate reaches 20-50%.

[0060] (5) Half of the medium-concentration CO2 product gas is cooled and pressurized. The compressor power is 368 kW. It is then sent to the compensated high-concentration product membrane separation system. After the residual gas II is recovered by the turbine (power is 122 kW), it is sent to the water body where aquatic organisms are raised and photocatalytic mediating materials are laid for multi-stage utilization of residual gas II. High-concentration CO2 product gas is generated on the permeate side to improve the economic value of the process.

[0061] Table 1 shows the consumption of natural gas and biofuel and the corresponding CO2 emissions in Comparative Example 1 and Application Example 1.

[0062] Table 1. Comparison of CO2 emissions from glass manufacturing based on bio-heavy oil and conventional natural gas.

[0063]

[0064] As shown in Table 1, Application Example 1 integrates technologies such as bio-heavy oil membrane emulsification, membrane separation carbon capture, and bio-carbon fixation to produce glass and treat exhaust gas under the new process conditions, reducing CO2 emissions to ~2.321 ton / h. Calculations show that Application Example 1 reduces CO2 emissions by 0.407 ton / ton (glass) per hour compared to the traditional process. Furthermore, when using both bio-heavy oil and natural gas as fuel, a mass ratio of 2.46:1 can transform glass production into a zero-CO2 emission process.

[0065] By changing the feed ratio of the compensated high-concentration product membrane separation system, calculations show that as the feed ratio increases, the overall economic value of the process significantly improves. Figure 2 ).

Claims

1. A device for low-carbon, green glass manufacturing using bio-heavy oil as fuel, characterized in that, include: Membrane emulsification system (B), kiln system (A), medium-concentration product membrane separation system (C), biological carbon fixation system (D), and compensated-high-concentration product membrane separation system (E). The membrane emulsification system (B) includes a CO2 aeration pressurization tank (8), a pressure membrane tank (9), a high-temperature sedimentation demulsification device (10), and a membrane jet emulsification device (11) connected in sequence, for producing bio-heavy oil W / O emulsion; The kiln system (A) includes a glass production furnace (2), which is connected to the outlet of the membrane jet emulsification device (11) and uses bio-heavy oil W / O emulsion as fuel; the kiln system (A) also includes a dust removal, desulfurization and denitrification assembly (3) connected to the flue gas outlet of the glass production furnace (2) and a cooling and pressurization assembly (4) connected to the outlet of the dust removal, desulfurization and denitrification assembly (3). The medium-concentration product membrane separation system (C) includes a membrane separation trapping device I (12), the inlet of which is connected to the outlet of the cooling and pressurizing assembly (4); the permeate outlet of the membrane separation trapping device I (12) is divided into two paths, the first path being connected to the biological carbon fixation system (D) and the second path being connected to the pressurizing assembly (21). The biological carbon fixation system (D) includes an aquatic biological carbon fixation tank (17) and a gas distributor (18). The gas distributor (18) is located in the aquatic biological carbon fixation tank (17) and is connected to the first permeate outlet of the membrane separation and collection device I (12). The compensated-high-concentration product membrane separation system (E) includes a membrane separation trapping device II (22), the inlet of which is connected to the outlet of the pressurization component (21); the high-concentration CO2 product gas outlet of the membrane separation trapping device II (22) is connected to the CO2 aeration pressurization tank (8) of the membrane emulsification system (B) for recycling high-concentration CO2 to the membrane emulsification system; the permeate gas outlet of the membrane separation trapping device II (22) is connected to the aquatic biological carbon fixation tank (17) of the biological carbon fixation system (D).

2. The apparatus for low-carbon and green glass manufacturing using bio-heavy oil as fuel as described in claim 1, characterized in that, The membrane tubes of the membrane emulsification system are made of ceramic or metal, and the membrane pore size is 50~2000 nm.

3. The apparatus for low-carbon and green glass manufacturing using bio-heavy oil as fuel as described in claim 1, characterized in that, The kiln system (A) also includes a raw material tank (1), a forming annealing assembly (5), and a low-carbon glass product storage tank (6); the raw material tank (1) is connected to the glass production furnace (2) and is used to transport glass preparation raw materials to the furnace; the product outlet of the glass production furnace (2) is connected to the forming annealing assembly (5), and the forming annealing assembly (5) is connected to the low-carbon glass product storage tank (6).

4. The apparatus for low-carbon and green glass manufacturing using bio-heavy oil as fuel as described in claim 1, characterized in that, The medium-concentration product membrane separation system (C) also includes a pressure potential energy recovery device I (14), and the residual gas outlet of the membrane separation and collection device I (12) is connected to the pressure potential energy recovery device I (14); the gas separation membrane used in the membrane separation and collection device I (12) is a membrane material that preferentially permeates CO2 gas, and the CO2 / N2 selectivity of the membrane is not less than 7.

5. The apparatus for low-carbon and green glass manufacturing using bio-heavy oil as fuel as described in claim 1, characterized in that, The compensated-high-concentration product membrane separation system (E) further includes a pressure potential energy recovery device II (25), and the permeate outlet of the membrane separation trapping device II (22) is connected to the biological carbon fixation system (D) through the pressure potential energy recovery device II (25); the CO2 / N2 selectivity of the membrane material used in the membrane separation trapping device II (22) is 20-60.

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