Device and method for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel

Abstract

The present invention discloses a device and method for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power, belonging to the field of chemical engineering technology. The device includes a membrane emulsification system for producing bio-heavy oil W / O emulsion; a kiln system for realizing low-carbon preparation of glass using bio-heavy oil W / O emulsion; a medium-concentration product membrane separation system for capturing CO2 in flue gas and producing medium-concentration CO2 product gas; a biological carbon fixation system for producing high-value-added products by utilizing aquatic biological metabolism, combining CO2 photocatalytic mediating materials, and coordinating aquatic biological capacity expansion technology for CO2 fixation and utilization; a compensatory high-concentration product membrane separation system for secondary concentration of medium-concentration CO2 product gas. This application replaces or partially replaces fossil fuels with bio-heavy oil emulsion, reduces carbon emissions in the melting stage, and captures CO2 in flue tail gas, forming a multifunctional CO2 cascade utilization process.

Description

Technical Field

[0001] The present invention relates to the field of chemical engineering technology, and in particular to a device and method for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power. Background Art

[0002] The glassmaking process generates significant carbon emissions, with the melting process typically requiring high temperatures of 1500-1600°C. Existing processes typically use fossil fuels to heat the glass raw materials for melting. Common fossil fuels include natural gas, coal tar, coke oven gas, producer gas, and petroleum coke. The combustion of these fuels produces significant amounts of CO2, resulting in the melting process accounting for over 60% of carbon emissions.

[0003] Bio-heavy oil is an environmentally friendly power fuel. Its carbon source is part of the biomass-atmosphere carbon exchange cycle, so it does not contribute to the total amount of CO2 in the atmosphere. Furthermore, its sulfur content is less than 0.05%, and while its calorific value (32-40MJ / kg) is slightly lower than that of regular 0# diesel (43MJ / kg), its oxygen content can reach 11%, resulting in more complete combustion, less exhaust smoke, and excellent combustion properties. By integrating this bio-heavy oil with existing processes, it can replace or partially replace traditional fossil fuels, helping to achieve zero-carbon emissions in the glass manufacturing process.

[0004] However, bio-heavy oil suffers from high viscosity, making it difficult to transport and atomize. Furthermore, its high salt content makes direct use prone to blockage and corrosion of equipment and pipelines. Scaled-up application requires pretreatment. Research indicates that emulsifying bio-heavy oil not only reduces its viscosity but also enhances its combustion efficiency through the micro-explosion effect of the emulsion, significantly improving its flammability. Therefore, optimizing the emulsification process to produce bio-heavy oil emulsions with controllable particle size could potentially reshape energy supply for the glass manufacturing industry.

[0005] In addition, the high-temperature flue gas generated during the glassmaking process typically contains large amounts of CO2 and N2. Directly discharging this flue gas into the atmosphere without further treatment will exacerbate the greenhouse effect. Therefore, capturing CO2 from flue gas is extremely necessary. Membrane separation technology is often used to recover CO2 from flue gas because it is not restricted by thermodynamic equilibrium.

[0006] Furthermore, to improve economic efficiency and achieve carbon reduction or even "negative" operation in the glassmaking process, in addition to capturing CO2 from flue gases, the captured CO2 should be further functionalized. Research has shown that the use of submerged plant growth-promoting slow-release tablets can slowly, steadily, and persistently release plant hormones and inorganic carbon sources underwater, synergistically enhancing the growth of submerged plants and improving seedling survival rates. However, the use of chemical agents presents ecological safety risks, requires long-term use, and requires further economic improvement. Alternatively, using CO2 to promote the growth of aquatic organisms is an 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. Furthermore, biomass is the only renewable carbon source and a zero-CO2 emission technology, aligning with the green and low-carbon development concept and the requirements of the Clean Development Mechanism. Its price is also lower than that of fossil fuels. This provides a highly feasible and promising application strategy for CO2 captured from the glassmaking process.

[0007] In summary, the existing glass manufacturing industry has huge carbon emissions during its production process, especially in the glass melting stage. Therefore, energy reconstruction based on bio-heavy oil fuel, combined with emulsification and aquatic biological capacity expansion technology, can be used to reengineer the glass production process into a low-carbon process flow. This has a practical and realistic basis and may achieve effective carbon reduction in the glass industry. Summary of the Invention

[0008] The purpose of the present invention is to solve the problems existing in the prior art and provide a device and method for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power. Bio-heavy oil emulsion is selected to replace or partially replace existing fossil fuels, thereby reducing carbon emissions in the glass melting stage. At the same time, CO2 emissions are greatly reduced by effectively capturing and multi-stage utilizing CO2 in the flue exhaust after combustion.

[0009] In order to achieve the above technical objectives, the present invention is implemented through the following technical solutions: a device for realizing low-carbon and green manufacturing of glass using bio-heavy oil as fuel power, comprising: a membrane emulsification system for producing bio-heavy oil W / O emulsion, reducing oil viscosity, and fully atomizing the bio-heavy oil; a kiln system for realizing low-carbon and green preparation of glass using bio-heavy oil W / O emulsion; a medium-concentration product membrane separation system for capturing CO2 in the flue gas produced in the glass production process in one step, with part of the medium-concentration CO2 product gas produced flowing into the biological carbon fixation system and part flowing into the compensation-high-concentration product membrane separation system after pressurized treatment; a biological carbon fixation system for producing high-value-added products by utilizing aquatic biological metabolism, combining CO2 photocatalytic mediating materials, and coordinating aquatic biological capacity expansion technology to fix and utilize CO2; a compensation-high-concentration product membrane separation system for secondary capture and concentration of the medium-concentration CO2 product gas, and the high-concentration CO2 product gas produced is recycled to the membrane emulsification system.

[0010] Furthermore, the membrane emulsification system includes a CO2 aeration and pressure tank, a pressure membrane tank, a high-temperature sedimentation and demulsification device and a membrane jet emulsification device. Deionized water is pressurized by CO2 aeration in the CO2 aeration and pressure tank to form a dispersed phase saturated carbonic acid. The dispersed phase and the bio-heavy oil as the continuous phase are respectively sent to the pressure membrane tank. The dispersed phase enters the continuous oil phase through the membrane pores under the pressure of CO2 gas. Thereafter, the dispersed phase is demulsified by high-temperature static sedimentation in the high-temperature sedimentation and demulsification to remove the generated salt and realize the purification of the heavy oil. The purified upper layer of oil is put into the membrane jet emulsification device, and the water is removed as an emulsifier. After membrane jet emulsification, a bio-heavy oil W / O emulsion is formed.

[0011] Furthermore, the temperature of the bio-heavy oil W / O emulsion is 90-160°C, the emulsified oil droplet size is between 2μm and 50μm, preferably 2μm to 10μm; the membrane tube material of the membrane emulsification system is ceramic or metal, and the membrane pore size is 50-2000nm, preferably 100-600nm.

[0012] Furthermore, the furnace system includes a glass production furnace, a raw material tank 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; bio-heavy oil W / O emulsion is used as furnace fuel; the furnace product is processed by a forming and annealing component to obtain a glass product and is stored in a low-carbon glass product storage tank; the high-temperature flue gas generated is pre-treated and used as feed gas for a medium-concentration product membrane separation system.

[0013] Furthermore, the pretreatment process is to first pass the high-temperature flue gas into the dust removal, desulfurization and denitrification components for filtration and dust removal and desulfurization and denitrification treatment, and then send it into the cooling and pressurization components for cooling and pressurization treatment, cooling and pressurizing the gas to a pressure of 0.5-0.8MPaG and a temperature of 15-25°C. The cold source for heat exchange, cooling and pressurization is pure water or cold brine.

[0014] Furthermore, the medium-concentration product membrane separation system includes a membrane separation capture device I and a pressure potential energy recovery device I. The raw gas input from the furnace system is concentrated by the membrane separation capture device I to obtain a medium-concentration CO2 product gas. The gas separation membrane used by the membrane separation capture device I is a membrane material that preferentially permeates CO2 gas. The CO2 / N2 selectivity of the membrane is not less than 7, the operating temperature is not higher than 50°C, and the operating pressure is 0.1-1.2MPaG; after treatment, the CO2 in the raw gas is concentrated by 20-70%, and the recovery rate is 30-70%; the generated residual gas I uses the pressure potential energy recovery device I to recover the pressure potential energy to compensate for the compressor energy consumption of the separation device.

[0015] Furthermore, the biological carbon fixation system uses a gas membrane distributed CO2 supply system to evenly introduce CO2 bubbles while stirring the water body, with a concentration of 0.5 to 1g 生物干重 / L 水体 The density of aquatic organisms planted is 4 to 8 × 10 -9 m 3 / s / g 生物干重 The particle size distribution range of CO2 bubbles is 10nm~5μm. Under the light environment, combined with CO2 photocatalytic mediating materials, light-driven water ecological biological capacity expansion in a CO2-rich environment can be achieved.

[0016] Furthermore, the compensation-high-concentration product membrane separation system includes a membrane separation capture device II and a pressure potential energy recovery device II. The inflowing medium-concentration CO2 product gas is concentrated again through the membrane separation capture device II. The CO2 / N2 selectivity of the membrane material used is 20-60, the operating temperature is 30-200°C, and the operating pressure is 0.1-1.2MPaG; the CO2 enriched gas is concentrated to more than 80-95%, and the recovery rate is 40-80%; the retentate gas II generated by the system is transported to the water body of the biological carbon fixation system after recovering the pressure potential energy through the pressure potential energy recovery device II.

[0017] Furthermore, part of the high-concentration CO2 product gas produced by the compensation-high-concentration product membrane separation system is used to compensate for the energy consumption of the compressor in the process of capturing CO2 by the medium-concentration product membrane separation system.

[0018] The process of using the above-mentioned bio-heavy oil-powered low-carbon green glass manufacturing device to produce glass and capture CO2 and cascade utilization is as follows:

[0019] 1) Bio-heavy oil is used as the continuous phase, deionized water is introduced into a CO2 aeration pressure tank, saturated carbonic acid generated under the CO2 aeration pressure is used as the dispersed phase, and water is used as the emulsifier. In a pressure membrane tank, the dispersed phase is allowed to enter the continuous phase through the membrane pores under the CO2 gas pressure, and the CO2 gas is allowed to fully react with the impurities of the bio-heavy oil. The emulsion is then broken by high-temperature static sedimentation in a high-temperature sedimentation demulsification device to remove the generated salts and achieve purification of the bio-heavy oil;

[0020] 2) The purified upper layer of oil is put into a membrane jet emulsification device, with deionized water as the dispersed phase and water as the emulsifier, to form a bio-heavy oil W / O emulsion after membrane jet emulsification;

[0021] 3) Using bio-heavy oil W / O emulsion as fuel to heat the glass production furnace, combined with conventional diesel to complete the startup process, the generated flue gas is filtered and dedusted by the dust removal, desulfurization and denitrification components, and then sent to the cooling and pressurization components for cooling and pressurization;

[0022] 4) The treated flue gas is used as the feed gas for the medium-concentration product membrane separation system, and is concentrated once using the membrane separation capture 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 of it flows into the compensation-high-concentration product membrane separation system after pressurization treatment by the pressurization component. The retentate gas I uses the pressure potential energy recovery device I to recover the pressure potential energy;

[0023] 5) The medium-concentration CO2 product gas leading to the biological carbon fixation system is transported to the water body. A gas membrane dispersed CO2 replenishment system is used to ensure uniform CO2 bubbles, allowing the CO2 to fully contact the aquatic organisms in the water body, and then combine with the biological metabolic process to produce high-value-added products. In addition, based on the CO2 photocatalytic mediating material laid in the water body, the aquatic organism capacity expansion technology is coordinated to achieve the fixation and utilization of CO2.

[0024] 6) The medium-concentration CO2 product gas introduced into the compensation-high-concentration product membrane separation system is concentrated again through the membrane separation capture 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 of the compressor during the capture process of the medium-concentration product membrane separation system; the retentate 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.

[0025] The beneficial effects of the present invention are:

[0026] 1. This application uses waste bio-heavy oil as a raw material, with saturated carbonic acid formed by deionized water under CO2 aeration pressure as the dispersed phase. High-temperature static sedimentation is used to break the emulsion and remove the generated salts to purify the bio-heavy oil. Water is then 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. Emulsification reduces the oil viscosity, facilitating transportation. Furthermore, the micro-explosion effect of the emulsion allows for sufficient atomization of the bio-heavy oil, facilitating combustion. This allows for efficient heating of glass furnaces, thereby replacing or partially replacing fossil fuels and reducing carbon emissions at the source.

[0027] 2. This application combines conventional heat exchange and compression technologies to pre-treat the high-temperature flue gas discharged from the glass furnace. A membrane material that preferentially permeates CO2 is then used to enrich and concentrate the CO2 in the flue gas. The retentate gas I is then discharged back into the atmosphere after recovering its pressure potential energy, thereby achieving effective capture of the CO2 generated during the glass manufacturing process.

[0028] 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 body, CO2 bubbles are evenly introduced to solve the problem of low CO2 solubility in the water body. The CO2 bubble particle size is preferably 10nm to 5μm, which increases the CO2 concentration in the water body. Then, by laying photocatalytic mediating materials, the water body ecosystem is regulated, so that the water body ecology develops in a positive direction. CO2 fully contacts aquatic organisms in the water body, and then combines with biological metabolic processes to produce high-value-added products, improve the efficiency of biological carbon fixation, and achieve CO2 fixation and utilization, thereby solving the problem of resource utilization of CO2 gas and providing technical support for the efficient treatment of CO2.

[0029] 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 compensating-high-concentration product membrane separation system for secondary concentration. Part of the produced high-concentration CO2 product gas can be used to offset the energy consumption costs of the medium-concentration product membrane separation system, and part can be recycled to the membrane emulsification system. The retentate gas II is sent to a turbine to recover pressure potential energy and then sent to a biological carbon sequestration system for multi-stage utilization. This not only forms a multifunctional CO2 cascade utilization process, but also further reduces environmental carbon emissions.

[0030] 5. This application reconstructs low-carbon processes from multiple dimensions, including energy structure adjustment, carbon capture, carbon sequestration, and carbon utilization, and provides a new solution for carbon emission reduction in the high-energy-consuming glass production industrial process. It combines membrane emulsification, membrane separation technology, and light-driven carbon sequestration technology of ecological aquatic organisms to achieve water quality treatment and efficient utilization of bio-heavy oil resources. It has an operational and realistic basis, can achieve efficient carbon reduction in the glass industry, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A process flow chart for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel;

[0032] Among them, A-kiln system, B-membrane emulsification system, C-medium concentration product membrane separation system, D-biological carbon fixation system, E-compensation-high concentration product membrane separation system;

[0033] 1-Raw material tank, 2-Glass production furnace, 3-Dust removal, desulfurization and denitrification components, 4-Cooling and pressurization components, 5-Forming and annealing components, 6-Low-carbon glass product storage tank;

[0034] 7-deionized water, 8-CO2 aeration pressure tank, 9-pressure membrane tank, 10-high temperature sedimentation demulsification device, 11-membrane jet emulsification device;

[0035] 12-Membrane separation capture device I, 13-Retentate gas I, 14-Pressure potential energy recovery device I, 15-Condensed water, 16-Exhaust gas exhaust;

[0036] 17-aquatic biological carbon fixation pool, 18-gas distributor, 19-high value-added products, 20-CO2 photocatalytic mediating materials;

[0037] 21- pressurizing assembly, 22- membrane separation and capture device II, 23- high-concentration CO2 product gas, 24- retentate gas II, 25- pressure potential energy recovery device II, 22- multi-stage utilization of retentate gas II;

[0038] Figure 2 It is the economic value change trend of the low-carbon green manufacturing solution for glass disclosed in this application calculated using EU standards and domestic standards. DETAILED DESCRIPTION

[0039] The following examples further illustrate the present invention, but should not be construed as limiting the present invention. Without departing from the essence of the present invention, modifications and substitutions made to the methods, steps or conditions of the present invention are within the scope of the present invention.

[0040] Example 1

[0041] In order to solve the problems of high energy consumption and large carbon emissions in the existing glass manufacturing process, this application reconstructs the low-carbon process from multiple dimensions such as energy structure adjustment - carbon capture - carbon sequestration - carbon utilization, and proposes a device that uses bio-heavy oil as fuel to achieve low-carbon green manufacturing of glass.

[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 compensation-high-concentration product membrane separation system. The medium-concentration product membrane separation system, the compensation-high-concentration product membrane separation system, the biological carbon fixation system and the membrane emulsification system are subsystems of each other, forming a complementary CO2 multifunctional cascade utilization process.

[0043] The kiln system utilizes the bio-heavy oil W / O emulsion prepared by the membrane emulsification system to realize low-carbon green production of glass. The kiln system includes a glass production kiln 2, a raw material tank 1, and a low-carbon glass product storage tank 6. The glass preparation raw materials in the raw material tank 1 are introduced into the glass production kiln 2. The bio-heavy oil W / O emulsion prepared by the membrane emulsification system is used as fuel power. In combination with the use of conventional diesel, the start-up process is completed to realize efficient and stable heat supply to the glass production kiln 2. The kiln product is annealed in the forming annealing component 5 and then formed. The obtained glass product is sent to the glass production kiln 2. The low-carbon glass product storage tank 6 is stored. The high-temperature flue gas generated during the processing of the glass production furnace 2 is filtered and dusted by the dust removal, desulfurization and denitrification component 3, and then sent to the cooling and pressurizing component 4 for further treatment. That is, it is introduced into the heat exchanger for cooling treatment through the induced draft fan and then pressurized and dehumidified by the compressor. The cold source for heat exchange, cooling and pressurization is pure water or cold brine. The pressure of the treated gas is 0.5-0.8MPaG and the temperature is 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, replacing or partially replacing fossil fuels and reducing carbon emissions at the source. It comprises a CO2 aeration and pressure tank 8, a pressure membrane tank 9, a high-temperature sedimentation and demulsification device 10, and a membrane jet emulsification device 11. Deionized water is introduced into the CO2 aeration and pressure tank 8, where it forms saturated carbonic acid under the CO2 aeration pressure. This carbonic acid is then fed into the pressure membrane tank 9 as the dispersed phase. The bio-heavy oil is then introduced into the pressure membrane tank 9 as the continuous oil phase. Under the CO2 gas pressure, the dispersed phase enters the continuous oil phase through the membrane pores, allowing the CO2 to fully react with impurities in the bio-heavy oil. The system then undergoes high-temperature static sedimentation and demulsification in the high-temperature sedimentation and demulsification device 10, removing the generated salts and purifying the heavy oil. The purified upper layer of oil is put into the membrane jet emulsification device 11. Water is used as an emulsifier. Water is added in a proportion of 3-10% of the mass of the bio-heavy oil. After membrane jet emulsification, a bio-heavy oil W / O emulsion with controllable emulsion particle size is formed, which reduces the viscosity of the bio-heavy oil, improves the fluidity and atomization performance, and realizes effective atomization of the bio-heavy oil.

[0045] Demulsification of the membrane emulsification is performed using an ultrasonic demulsifier or a static demulsification tank. The emulsification process is based on a membrane jet emulsification process. The bio-heavy oil emulsion temperature is 90-160°C. The membrane tubes of the membrane emulsification system are made of ceramic or metal, with a pore size of 50-2000nm, preferably 100-600nm. The emulsified oil droplet size ranges from 2μm to 50μm.

[0046] The finished emulsion is transported to the furnace system as combustion power. After the emulsion is made, the dispersion of the bio-heavy oil droplets is improved. Based on its micro-explosion effect, the combustion efficiency of the bio-heavy oil can be improved, and efficient and stable heating for the glass furnace can be achieved.

[0047] The medium-concentration product membrane separation system is used to capture CO2 from flue gas. It comprises a membrane separation capture unit I and a pressure potential energy recovery unit I. The feed gas from the kiln system is subjected to membrane separation treatment in membrane separation capture unit I 12, resulting in a medium-concentration CO2 product gas. The gas separation membrane in membrane separation capture unit I 12 is made of a material that preferentially permeates CO2, with a CO2 / N2 selectivity of at least 7. The operating temperature is no higher than 50°C, and the operating pressure is 0.1-1.2 MPaG. After treatment in membrane separation capture unit I 12, the CO2 in the feed gas is concentrated by 20-70%, with a recovery rate between 30-70%. A portion of the captured medium-concentration CO2 product gas flows into the biological carbon sequestration system, while a portion is pressurized by a pressurization component 21 and then flows into the compensating-high-concentration product membrane separation system for further processing. The generated residual gas I uses the pressure potential energy recovery device I to recover the pressure potential energy, that is, it enters the turbine to generate electricity to recover the pressure potential energy, compensate for the energy consumption of the compressor of the capture device, and then the exhausted gas is discharged after the potential energy is recovered.

[0048] The biological carbon fixation system is used to produce high value-added products by utilizing aquatic biological metabolism, combining CO2 photocatalytic mediating materials and coordinating aquatic biological capacity expansion technology to achieve the fixation and utilization of CO2. It includes an aquatic biological carbon fixation pool 17 and a gas distributor 18. The medium-concentration CO2 product gas flowing from the medium-concentration product membrane separation system is used as the gas source and is transported to the water body in the aquatic biological carbon fixation pool 17 through an induced draft fan. The gas is dispersed by the gas distributor 18, and the water body is stirred during the introduction of CO2, so that the gas source can fully contact with the aquatic organisms in the pool, and then combine with the biological metabolic process to produce high value-added products 19. Preferably, according to 0.5~1g 生物干重 / L 水体 Plants were planted at a density of 4 × 10 -9 ~8×10 -9 m 3 / s / g 生物干重 CO2 is introduced, and the particle size distribution range of CO2 bubbles is 10nm~5μm. In addition, CO2 photocatalytic mediating material 20 (preferably TiO2-based photocatalytic mediating material) is laid in the water body, and the aquatic biological capacity expansion technology is coordinated to achieve the fixation and utilization of CO2.

[0049] The compensatory high-concentration product membrane separation system is used to recapture and concentrate medium-concentration CO2 product gas to produce high-concentration CO2 product gas 23. This system comprises a membrane separation capture unit II 22 and a pressure potential energy recovery unit II 25. A portion of the medium-concentration CO2 product gas, after pressurization, flows into membrane separation capture unit II for further membrane separation and concentration. The membrane material used in membrane separation capture unit II has a CO2 / N2 selectivity of 20-60, operates at a temperature of 30-200°C, 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 resulting high-concentration CO2 product gas 23 is partially recycled to the membrane emulsification system for CO2 aeration and pressurization. Retentate gas II recovers its pressure potential energy in the pressure potential energy recovery unit II (turbine) and is then transported to the water body of the biological carbon sequestration system, enabling multi-stage utilization of retentate gas II, further reducing CO2 emissions and improving process value.

[0050] The medium-concentration product membrane separation system and the compensating-high-concentration product membrane separation system are complementary treatment systems. The high-concentration CO2 product gas captured by the compensating-high-concentration product membrane separation system is used to compensate for the energy consumption of 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 kiln, and the temperature of the kiln during the melting stage is 1500-1600°C. Assuming that the normal production conditions of the glass preparation process are met, the natural gas intake volume is 2765Nm 3 / h (1.96 ton / h), and produces mixed gas after being mixed with air and burned. The calorific value of natural gas combustion is 1.00×10 5 MJ / h. After the kiln and the steam drum exchange heat, the by-product steam output is 3.343 ton / h, and the kiln mixed gas temperature drops to 400℃.

[0053] (2) After the mixed gas is processed by electrostatic dust removal, desulfurization, denitrification and cooling, the temperature is about 200℃, and it enters the exhaust pipe through the induced draft fan and is transported to the chimney, generating 34945Nm 3 / h of flue gas, of which CO2 accounts for about 8.3%, which is directly discharged into the atmosphere. The CO2 emission is 5.496 tons / h. The glass product production capacity is 16.7 tons / h. Using this process for preparation, the CO2 emission discharged into the environment is 4.478 tons / ton (glass).

[0054] Application Example 1

[0055] (1) Bio-heavy oil is used as the continuous phase, deionized water is introduced into the CO2 aeration pressure tank, saturated carbonic acid generated under the CO2 aeration pressure is used as the dispersed phase, and water is used as the emulsifier. In the pressure membrane tank, the dispersed phase is allowed to enter the continuous phase through the membrane pores under the CO2 gas pressure, and the CO2 gas is allowed to fully react with the impurities of the bio-heavy oil. The emulsion is broken by high-temperature static sedimentation in the high-temperature sedimentation demulsification device to remove the generated salt and achieve purification of the bio-heavy oil;

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

[0057] 3) Bio-heavy oil emulsion is used to replace natural gas, and ordinary diesel is used as a starting combustion agent to achieve the purpose of using bio-heavy oil as fuel to heat the glass furnace. The melting temperature is 1500-1600℃. When the above natural gas burns the same amount of heat (1.00×10 5 MJ / h), it needs to consume 2.50 ton / h of bio-heavy oil. According to the conservation of elements, the CO2 produced by bio-heavy oil is about 7.084 ton / h, which generates 43959 Nm 3 / h of flue gas, the by-product steam output is 3.343 ton / h, and the kiln mixed gas temperature is reduced to 400℃.

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

[0059] (4) The medium-concentration CO2 product gas collected by the medium-concentration product membrane separation system is transported to the membrane dispersed gas distributor of the biological carbon fixation system through an induced draft fan. CO2 is evenly introduced while stirring the water body to increase the CO2 concentration in the water body and control the CO2 bubble particle size range to 10nm~5μm. By laying CO2 photocatalytic mediating materials and cultivating aquatic organisms, the CO2 utilization rate reaches 20-50%.

[0060] (5) Half of the medium-concentration CO2 product gas is cooled and pressurized with a compressor power of 368kW, and then transported to the compensation-high-concentration product membrane separation system. The retentate gas II is recovered through the turbine with a pressure potential energy of 122kW, and then transported to the water body where aquatic organisms are cultured and photocatalytic mediating materials are laid, for multi-stage utilization of the retentate gas II; high-concentration CO2 product gas is generated on the osmotic side, thereby improving the economic value of the process.

[0061] The consumption of natural gas and bio-heavy oil and the corresponding CO2 emissions in Comparative Example 1 and Application Example 1 are shown in Table 1.

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

[0063] Bio-heavy oil process Natural gas process Kiln consumption, ton / h 2.50 1.96 Calorific value, MJ / h <![CDATA[1.00×10 5 ]]> <![CDATA[1.00×10 5 ]]> <![CDATA[CO2 emissions of the kiln, ton / h]]> 7.084 5.496 <![CDATA[Equivalent CO2 emissions of by-product steam, ton / h]]> ～1.018 ～1.018 <![CDATA[Carbon dioxide fixation by aquatic organisms in medium-concentration product gas, ton / h]]> ～1.151 - <![CDATA[Compensation type - CO2 capture amount of high-concentration product membrane separation system, ton / h]]> ～1.427 - <![CDATA[Carbon sequestration CO2 amount of aquatic organisms in raffinate gas II, ton / h]]> ～0.439 - <![CDATA[Equivalent CO2 emissions of total newly added power equipment, ton / h]]> 1.714 - <![CDATA[Total process relative environmental CO2 emissions, ton / h]]> ～2.321 4.478 <![CDATA[CO2 emissions per ton of glass product, ton / ton]]> ～0.139 0.268

[0064] As shown in Table 1, Application Example 1, which integrates bio-heavy oil membrane emulsification, membrane separation carbon capture, and bio-carbon sequestration technologies, produces glass and treats tail gas emissions under novel process conditions, reducing CO2 emissions to ~2.321 tons / hour. Calculations show that Application Example 1 reduces CO2 emissions by 0.407 tons / ton (glass) per hour compared to conventional processes. By conversion, when using bio-heavy oil and natural gas as fuels simultaneously, with a mass ratio of 2.46:1, glass production can be transformed into a zero-CO2 production process.

[0065] By changing the feed ratio of the compensation-high concentration product membrane separation system, it is calculated that as the feed ratio increases, the total process economic value is significantly improved ( Figure 2 ).

[0066] The above shows and describes the basic principles, main features, and advantages of the present invention. However, the above is only a specific embodiment of the present invention, and the technical features of the present invention are not limited thereto. Any other implementation methods derived by any person skilled in the art without departing from the technical solution of the present invention are intended to be within the scope of the present invention.

Claims

1. A device for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power, characterized in that: include: Membrane emulsification system, used to produce bio-heavy oil W / O emulsion, reduce oil viscosity, and fully atomize bio-heavy oil; Kiln system, using bio-heavy oil W / O emulsion to achieve low-carbon glass production; The medium-concentration product membrane separation system is used to capture CO2 from the flue gas produced during the glass production process. The membrane separation capture device I is used for primary concentration to produce medium-concentration CO2 product gas. Part of the medium-concentration CO2 product gas flows into the biological carbon fixation system, and part of it flows into the compensation-high-concentration product membrane separation system after pressurization treatment by the pressurization component. The pressure potential energy of the retentate gas I is recovered by the pressure potential energy recovery device I. The biological carbon fixation system utilizes aquatic biological metabolism to produce high-value-added products, combines CO2 photocatalytic mediating materials, and cooperates with aquatic biological capacity expansion technology to fix and utilize CO2. The biological carbon fixation system uses a gas membrane dispersed CO2 supply system to evenly introduce CO2 bubbles while stirring the water body, with a concentration of 0.5 to 1g 生物干重 / L 水体 The density of aquatic organisms planted is 4 to 8 × 10 -9 m 3 / s / g 生物干重 The particle size distribution of CO2 bubbles ranges from 10nm to 5μm. Under light conditions, combined with CO2 photocatalytic mediating materials, light-driven water ecological biocapacity expansion in a CO2-rich environment is achieved, and CO2 is fixed and utilized. Compensation type - high-concentration product membrane separation system, the medium-concentration CO2 product gas is further concentrated through the membrane separation capture 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 capture process of the medium-concentration product membrane separation system; the retentate 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.

2. The device for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power according to claim 1, characterized in that: The membrane emulsification system includes a CO2 aeration and pressure tank, a pressure membrane tank, a high-temperature sedimentation and demulsification device and a membrane jet emulsification device. Deionized water is pressurized by CO2 aeration in the CO2 aeration and pressure tank to form a dispersed phase saturated carbonic acid. The dispersed phase and the bio-heavy oil as the continuous phase are respectively sent to the pressure membrane tank. The dispersed phase enters the continuous oil phase through the membrane pores under the pressure of CO2 gas. It is then demulsified by high-temperature static sedimentation in the high-temperature sedimentation and demulsification device to remove the generated salt and purify the heavy oil. The purified upper layer of oil is put into the membrane jet emulsification device, using water as the emulsifier, and a bio-heavy oil W / O emulsion is formed after membrane jet emulsification.

3. The device for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power according to claim 2, characterized in that: The temperature of the bio-heavy oil W / O emulsion is 90-160°C, and the emulsified oil droplet size is between 2μm and 50μm; the membrane tube material of the membrane emulsification system is ceramic or metal, and the membrane pore size is 50-2000nm.

4. The device for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power according to claim 1, characterized in that: The furnace system includes a glass production furnace, a raw material tank 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 production raw materials to the furnace; bio-heavy oil W / O emulsion is used as furnace fuel; the furnace products are processed into glass products through forming and annealing components and stored in the low-carbon glass product storage tank; the high-temperature flue gas generated is pre-treated and used as feed gas for the medium-concentration product membrane separation system.

5. The device for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power according to claim 4, characterized in that: The pretreatment process is to first pass the high-temperature flue gas into the dust removal, desulfurization and denitrification components for filtration and dust removal and desulfurization and denitrification treatment, and then send it to the cooling and pressurization components for cooling and pressurization treatment, cooling and pressurizing to a gas pressure of 0.5-0.8MPaG and a temperature of 15-25°C. The cold source for heat exchange, cooling and pressurization is pure water or cold brine.

6. The device for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power according to claim 1, characterized in that: The medium-concentration product membrane separation system includes a membrane separation capture device I and a pressure potential energy recovery device I. The raw gas input from the furnace system is concentrated by the membrane separation capture device I to obtain a medium-concentration CO2 product gas. The gas separation membrane used in the membrane separation capture device I is a membrane material that preferentially permeates CO2 gas. The CO2 / N2 selectivity of the membrane is not less than 7, the operating temperature is not higher than 50°C, and the operating pressure is 0.1-1.2MPaG; after treatment, the CO2 in the raw gas is concentrated by 20-70%, and the recovery rate is 30-70%; the generated retentate gas I uses the pressure potential energy recovery device I to recover the pressure potential energy to compensate for the compressor energy consumption of the separation device.

7. The device for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power according to claim 1, characterized in that: The compensation-high-concentration product membrane separation system includes a membrane separation capture device II and a pressure potential energy recovery device II. The inflowing medium-concentration CO2 product gas is concentrated again through the membrane separation capture device II. The CO2 / N2 selectivity of the membrane material used is 20-60, the operating temperature is 30-200°C, and the operating pressure is 0.1-1.2MPaG; the CO2-enriched gas is concentrated to more than 80-95%, and the recovery rate is 40-80%; the retentate gas II generated by the system is transported to the water body of the biological carbon fixation system after the pressure potential energy is recovered by the pressure potential energy recovery device II.

8. The device for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power according to claim 1, characterized in that: Compensation type - The high-concentration CO2 product gas produced by the high-concentration product membrane separation system is partially used to compensate for the energy consumption of the compressor in the process of capturing CO2 in the medium-concentration product membrane separation system.

9. A method for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power, characterized in that: The method is carried out based on the device according to any one of claims 1 to 8, and comprises the following steps: 1) Bio-heavy oil is used as the continuous phase, deionized water is introduced into a CO2 aeration pressure tank, saturated carbonic acid generated under the CO2 aeration pressure is used as the dispersed phase, and water is used as the emulsifier. In a pressure membrane tank, the dispersed phase is allowed to enter the continuous phase through the membrane pores under the CO2 gas pressure, and the CO2 gas is allowed to fully react with the impurities of the bio-heavy oil. The emulsion is then broken by high-temperature static sedimentation in a high-temperature sedimentation demulsification device to remove the generated salts and achieve purification of the bio-heavy oil; 2) The purified upper layer of oil is put into a membrane jet emulsification device, with deionized water as the dispersed phase and water as the emulsifier, to form a bio-heavy oil W / O emulsion after membrane jet emulsification; 3) Using bio-heavy oil W / O emulsion as fuel to heat the glass production furnace, combined with conventional diesel to complete the startup process, the generated flue gas is filtered and dedusted by the dust removal, desulfurization and denitrification components, and then sent to the cooling and pressurization components for cooling and pressurization; 4) The treated flue gas is used as the feed gas for the medium-concentration product membrane separation system, and is concentrated once using the membrane separation capture 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 of it flows into the compensation-high-concentration product membrane separation system after pressurization treatment by the pressurization component. The retentate gas I uses the pressure potential energy recovery device I to recover the pressure potential energy; 5) The medium-concentration CO2 product gas leading to the biological carbon fixation system is transported to the water body. A gas membrane dispersed CO2 replenishment system is used to ensure uniform CO2 bubbles, allowing the CO2 to fully contact the aquatic organisms in the water body, and then combine with the biological metabolic process to produce high-value-added products. In addition, based on the CO2 photocatalytic mediating material laid in the water body, the aquatic organism capacity expansion technology is coordinated to achieve the fixation and utilization of CO2. 6) The medium-concentration CO2 product gas introduced into the compensation-high-concentration product membrane separation system is concentrated again through the membrane separation capture 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 of the compressor during the capture process of the medium-concentration product membrane separation system; the retentate 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.

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