Device and method for realizing low-carbon green manufacturing of glass by taking biological heavy oil as fuel power

Abstract

The invention discloses a device and a method for realizing low-carbon green manufacturing of glass by taking biological heavy oil as fuel power, and belongs to the technical field of chemical engineering. The device comprises a membrane emulsification system for producing a biological heavy oil W / O emulsion; the kiln system is used for realizing low-carbon preparation of the glass by utilizing the biological heavy oil W / O emulsion; the medium-concentration product membrane separation system is used for capturing CO2 in the flue gas and producing medium-concentration CO2 product gas; the biological carbon sequestration system is used for producing high-added-value products by utilizing metabolism of aquatic organisms, and fixing and utilizing CO2 by combining a CO2 photocatalytic mediating material and cooperating with an aquatic organism compatibilization technology; and the compensation-type high-concentration product membrane separation system is used for carrying out secondary concentration on the medium-concentration CO2 product gas. The biological heavy oil emulsion is used for replacing or partially replacing fossil fuel, carbon emission in the founding stage is reduced, CO2 in flue tail gas is captured, and the multifunctional CO2 gradient utilization process is formed.

Description

Technical Field

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

[0002] The glass manufacturing process has a large carbon emission, and its melting process is generally required to be carried out under high temperature conditions of 1500-1600℃. In the existing process, fossil energy is usually used as fuel power to provide heat to achieve the melting of glass raw materials. Common fossil energy sources include natural gas, coal tar, coke oven gas, producer gas, petroleum coke, etc. The combustion of such fuels will produce a large amount of CO2, resulting in carbon emissions in the melting process accounting for more than 60% of the entire process.

[0003] Bio-heavy oil is an environmentally friendly power fuel. Its carbon source belongs to the biomass-atmosphere carbon exchange cycle system, so it will not increase the total amount of CO2 in the atmosphere. At the same time, the sulfur content of bio-heavy oil is less than 0.05%, and its calorific value (32-40MJ / kg) is slightly lower than that of ordinary 0# diesel (43MJ / kg), but its oxygen content can reach 11%, so it burns more fully, with less exhaust smoke, and has good combustion performance. Combining this biomass oil product with existing technology to make resourceful use of 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 has the problem of high viscosity, which makes it difficult to transport and atomize. In addition, it has a high salt content, and direct use can easily cause equipment pipeline blockage and corrosion. If it is to be used on a large scale, it needs to be pretreated. Relevant studies have pointed out that emulsifying bio-heavy oil can not only reduce its viscosity, but also improve the combustion efficiency of bio-heavy oil based on the micro-explosion effect of the emulsion, significantly improving the combustion properties of the oil. Therefore, if a bio-heavy oil emulsion with controllable emulsion particle size can be prepared by optimizing the emulsification process, it will be expected to achieve the reconstruction of the energy supply for the glass manufacturing industry.

[0005] In addition, the high-temperature flue gas generated during the glass manufacturing process usually contains a large amount of CO2 and N2. If the flue gas is directly discharged into the atmosphere without further treatment, it will continue to aggravate the greenhouse effect. Therefore, it is extremely necessary to capture CO2 in the flue gas. Among them, membrane separation technology is often used to recover CO2 in flue gas because it is not limited by thermodynamic equilibrium.

[0006] In addition, in order to improve the economic effect and achieve carbon reduction or even "negative carbon" operation in the glass manufacturing process, in addition to capturing CO2 in flue gas, the captured CO2 gas should also be further functionalized. Relevant studies have shown that the use of submerged plant growth-promoting slow-release tablets can slowly, stably and persistently release plant hormones and inorganic carbon sources at the bottom of the water, synergistically enhance the growth state of submerged plants, and improve the survival rate of seedlings. However, the pharmaceutical method has ecological safety risks during use, and the pharmaceutical needs to be used for a long time, and the economic efficiency needs to be improved. As an alternative, the use of CO2 to promote the growth of aquatic organisms is an ideal solution. The photosynthesis of plants and microalgae is an effective way to utilize CO2. Cultivating aquatic organisms in water bodies can achieve biological carbon fixation and produce high value-added products through biological metabolism. Moreover, biomass is the only renewable carbon source and belongs to CO2 zero-emission technology. It meets the green and low-carbon development concept and the requirements of the clean development mechanism, and its price is lower than that of fossil fuels. This also provides a very feasible and promising application idea for CO2 captured from the glass manufacturing process.

[0007] In summary, the existing glass manufacturing industry has huge carbon emissions in the 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 reengineer the glass production process into a low-carbon process flow. This has an operational 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 to provide a device and method for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power, and to select bio-heavy oil emulsion to replace or partially replace existing fossil fuels, thereby reducing carbon emissions in the glass melting stage, and at the same time, by effectively capturing and multi-stage utilizing CO2 in the flue exhaust gas after combustion, greatly reducing CO2 emissions.

[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, including: a membrane emulsification system, used to produce bio-heavy oil W / O emulsion, reduce oil viscosity, and fully atomize the bio-heavy oil; a kiln system, using bio-heavy oil W / O emulsion to realize low-carbon and green preparation of glass; a medium-concentration product membrane separation system, used to capture CO2 in the flue gas produced in the glass production process once, and part of the medium-concentration CO2 product gas produced flows into the biological carbon fixation system, and part flows into the compensation-high-concentration product membrane separation system after pressurization treatment; 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 compensation-high-concentration product membrane separation system is used to secondary capture and concentrate the medium-concentration CO2 product gas, and the produced high-concentration CO2 product gas 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 a continuous phase are respectively sent to the pressure membrane tank. The dispersed phase enters the continuous oil phase through the membrane pores under the CO2 gas pressure, and then is demulsified by high-temperature static sedimentation in the high-temperature sedimentation and demulsification to remove the generated salt and purify 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 to 2000nm, preferably 100 to 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 annealing component to obtain a glass product and stored in a low-carbon glass product storage tank; the high-temperature flue gas generated is used as a raw gas for a medium-concentration product membrane separation system after pretreatment.

[0013] Furthermore, the pretreatment process is to first pass the high-temperature flue gas into the dust removal, desulfurization and denitrification components for filtering and dust removal and desulfurization and denitrification treatment, and then send it to the cooling and pressurizing component for cooling and pressurizing 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.

[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 dispersed CO2 replenishment system to evenly introduce CO2 bubbles while stirring the water body, at a rate of 0.5 to 1 g 生物干重 / L 水体 The density of aquatic organisms planted is 4-8×10 -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 compensatory-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.

[0017] Furthermore, part of the high-concentration CO2 product gas produced by the compensating-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 as fuel power to realize low-carbon green glass manufacturing device for glass production and CO2 capture and cascade utilization is as follows:

[0019] 1) With bio-heavy oil as the continuous phase, deionized water is introduced into the CO2 aeration pressure tank, and saturated carbonic acid generated under the CO2 aeration pressure is used as the dispersed phase. The emulsifier is water. In the pressure membrane tank, the dispersed phase enters the continuous phase through the membrane pores under the CO2 gas pressure, and the CO2 gas is fully reacted with the impurities of the bio-heavy oil. The bio-heavy oil is demulsified by high-temperature static sedimentation in the high-temperature sedimentation demulsification device, and the generated salt is removed to achieve purification of the bio-heavy oil;

[0020] 2) taking the purified upper layer of oil and putting it into a membrane jet emulsification device, using deionized water as the dispersed phase and water as the emulsifier, and forming a biological 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 the use of conventional diesel to complete the start-up process, the flue gas generated is filtered and dusted 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 of the medium-concentration product membrane separation system, and is concentrated once by 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 being pressurized by the pressurizing component. The residual 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, and the gas membrane dispersed CO2 supply system is used to ensure uniform CO2 bubbles, so that CO2 can fully contact with 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 the high-concentration CO2 product gas. Part of the high-concentration CO2 product gas is recycled to the membrane emulsification system, and part of it 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. The present application uses waste bio-heavy oil as raw material, saturated carbonic acid formed by deionized water under CO2 aeration pressure as dispersed phase, demulsifies through high-temperature static sedimentation, removes generated salts, and purifies bio-heavy oil. Water is then used as an emulsifier to emulsify the bio-heavy oil using membrane jet emulsification technology 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, with the help of the micro-explosion effect of the emulsion, the bio-heavy oil can be fully atomized, which is conducive to combustion, and can achieve efficient heating of the glass kiln, thereby replacing or partially replacing fossil fuels, and achieving the purpose of reducing carbon emissions from the source;

[0027] 2. The present application combines conventional heat exchange and compression technology to pre-treat the high-temperature flue gas discharged from the glass furnace, and then uses a membrane material that preferentially permeates CO2 to enrich and concentrate the CO2 in the flue gas, and the residual gas I recovers the pressure potential energy and is discharged back into the atmosphere, thereby achieving effective capture of CO2 generated in 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, and evenly introduces CO2 bubbles while stirring the water body to solve the problem of low CO2 dissolution in the water body. The CO2 bubble particle size is preferably 10nm~5μm, and the CO2 concentration in the water body is increased. Then, the water ecosystem is regulated by laying photocatalytic mediating materials, so that the water ecology develops in a positive direction, CO2 is fully in contact with aquatic organisms in the water body, and then combined with the biological metabolic process to produce high-value-added products, improve the efficiency of biological carbon fixation, and realize the fixation and utilization of CO2, thereby solving the problem of resource utilization of CO2 gas and providing technical support for the efficient treatment of CO2;

[0029] 4. In the present application, a portion of the medium-concentration CO2 product gas captured by the medium-concentration product membrane separation system is sent to the compensation-high-concentration product membrane separation system for secondary concentration. A portion of the high-concentration CO2 product gas produced can be used to compensate for the energy consumption cost of the medium-concentration product membrane separation system, and a portion can be recycled to the membrane emulsification system; the retentate gas II is sent to the turbine to recover the pressure potential energy and then sent to the biological carbon fixation system for multi-stage utilization, which 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 such as energy structure adjustment - carbon capture - carbon fixation - carbon use, 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 ecological aquatic biological carbon fixation technology to achieve water quality treatment and efficient utilization of biological 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 power;

[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 pressurizing 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 capture device II, 23-high-concentration CO2 product gas, 24-retentate gas II, 25-pressure potential energy recovery device II, 22-retentate gas II multi-stage utilization;

[0038] Figure 2 It is the changing trend of the economic value 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 content of 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 all fall 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 fixation-carbon use, 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 compensatory-high-concentration product membrane separation system. The medium-concentration product membrane separation system, the compensatory-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 uses the bio-heavy oil W / O emulsion prepared by the membrane emulsification system to achieve low-carbon green preparation 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, combined with the use of conventional diesel to complete the start-up process, and realize efficient and stable heat supply to the glass production kiln 2. The kiln product is annealed by the forming annealing component 5 and then formed. The obtained glass product is sent to 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 dehydrated by the compressor. The cold source for heat exchange, cooling and pressurization is pure water or cold salt water. 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 raw gas for the medium-concentration product membrane separation system.

[0044] The membrane emulsification system is used to emulsify bio-heavy oil, reduce oil viscosity, fully atomize bio-heavy oil, replace or partially replace fossil fuels, and reduce carbon emissions from the source. It includes a CO2 aeration and pressure tank 8, a pressure membrane tank 9, a high-temperature sedimentation demulsification device 10, and a membrane jet emulsification device 11; deionized water is passed into the CO2 aeration and pressure tank 8, saturated carbonic acid is formed under the CO2 aeration pressure, and is sent to the pressure membrane tank 9 as a dispersed phase, and the bio-heavy oil is passed into the pressure membrane tank 9 as a continuous oil phase, and the dispersed phase enters the continuous oil phase through the membrane pores under the CO2 gas pressure, so that CO2 and the impurities of the bio-heavy oil fully react, and then the high-temperature static sedimentation demulsification is carried out in the high-temperature sedimentation demulsification device 10 to remove the generated salt and achieve the purification of the heavy oil. The purified upper layer of oil is put into the membrane jet emulsification device 11, water is used as an emulsifier, and 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, the viscosity of the bio-heavy oil is reduced, the fluidity and atomization performance are improved, and the effective atomization of the bio-heavy oil is achieved.

[0045] The emulsification of membrane emulsification is carried out by ultrasonic emulsification device or static stratification tank. The emulsification process is realized based on membrane jet emulsification process, the temperature of bio-heavy oil emulsion is 90-160℃, the membrane tube material of membrane emulsification system is ceramic or metal, the pore size is 50-2000nm, preferably 100-600nm; the emulsified oil droplet size is between 2μm-50μm.

[0046] The finished emulsion is transported to the furnace system as a combustion power. After being made into an emulsion, 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 in flue gas, including a membrane separation capture device I and a pressure potential energy recovery device I. The raw gas input from the furnace system is subjected to membrane separation treatment by the membrane separation capture device I12 to harvest medium-concentration CO2 product gas. The gas separation membrane used in the membrane separation capture device I12 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 being treated by the membrane separation capture device I12, the CO2 in the raw gas is concentrated by more than 20-70%, 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 a portion of the captured medium-concentration CO2 product gas flows into the compensating-high-concentration product membrane separation system for further treatment after being pressurized by the pressurizing component 21. 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, compensates 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 in 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 Plant density is 4×10 -9 ~8×10 -9 m 3 / s / g 生物干重 CO2 is introduced, and the distribution range of CO2 bubble particle size 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 compensation-high concentration product membrane separation system is used to re-capture and concentrate the medium concentration CO2 product gas to produce high concentration CO2 product gas 23. The system includes a membrane separation capture device Ⅱ 22 and a pressure potential energy recovery device Ⅱ 25. After the pressure treatment, part of the medium concentration CO2 product gas flows into the membrane separation capture device Ⅱ and is re-concentrated after membrane separation treatment. The CO2 / N2 selectivity of the membrane material used in the membrane separation capture device Ⅱ is 20-60, the operating temperature is 30-200℃, and the operating pressure is 0.1-1.2MPaG. After the treatment is completed, the CO2 enriched gas is concentrated to more than 80-95%, and the recovery rate is between 40-80%. The high concentration CO2 product gas 23 produced is partially recycled to the membrane emulsification system for the CO2 aeration pressurization process. After the pressure potential energy is recovered by the pressure potential energy recovery device Ⅱ (turbine), the retentate gas Ⅱ is transported to the water body of the biological carbon fixation system to realize the multi-stage utilization of the retentate gas Ⅱ, further reduce the CO2 environmental emissions, and improve the process value.

[0050] The medium-concentration product membrane separation system and the compensating-high-concentration product membrane separation system are complementary processing 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 mixing with air. 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 treated by electrostatic dust removal, desulfurization, denitrification and cooling process, 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 a continuous phase, deionized water is introduced into a CO2 aeration pressure tank, saturated carbonic acid generated under the CO2 aeration pressure is used as a dispersed phase, and water is used as an emulsifier. In a pressure membrane tank, the dispersed phase enters the continuous phase through the membrane pores under the CO2 gas pressure, and the CO2 gas is fully reacted with the impurities of the bio-heavy oil. The bio-heavy oil is demulsified by high-temperature static sedimentation in a high-temperature sedimentation demulsification device, and the generated salt is removed to achieve purification of the bio-heavy oil;

[0056] 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, the bio-heavy oil emulsification temperature is 90-160° C., and an oil-in-water emulsified bio-heavy oil is prepared, the droplet size is less than 10 μm, and the droplet water content is about 5%.

[0057] 3) Bio-heavy oil emulsion is used to replace natural gas, and ordinary diesel is used as a starting combustion aid to achieve the purpose of using bio-heavy oil as fuel to heat the glass kiln. The melting temperature is 1500-1600℃. When the above natural gas burns the same amount of heat (1.00×10 5 MJ / h), 2.50 ton / h of bio-heavy oil is needed. According to the principle of conservation of elements, the CO2 produced by bio-heavy oil is about 7.084 ton / h, which can generate 43959 Nm 3 / h of flue gas, the by-product steam output is 3.343ton / 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, dehydration and pressurization (the compressor power is 3892kW), with a pressure of 0.5-0.8MPaG and a temperature of about 25°C. It is then used as raw gas to enter the medium-concentration product membrane separation system, and the CO2 is enriched and concentrated on the permeate side. The concentration is not less than 2 times, and 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. The CO2 bubble particle size range is controlled to be 10nm to 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 compensating-high-concentration product membrane separation system. The retentate gas II is transported to the water body where aquatic organisms are cultured and photocatalytic mediating materials are laid after recovering the pressure potential energy through the turbine (power is 122kW) for multi-stage utilization of the retentate gas II; high-concentration CO2 product gas is generated on the osmosis side, thereby improving the economic value of the process.

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

[0064]

[0065] As shown in Table 1, Application Example 1 comprehensively applies technologies such as bio-heavy oil membrane emulsification, membrane separation carbon capture and bio-carbon fixation to produce glass and treat tail gas under new process conditions, and CO2 emissions are reduced to ~2.321 ton / h. According to calculations, Application Example 1 reduces CO2 emissions by 0.407 ton / ton (glass) per hour compared to traditional processes. After conversion, when bio-heavy oil and natural gas are used as fuels at the same time, when the mass ratio of the two is 2.46:1, glass production can be transformed into a CO2 zero-emission production process.

[0066] 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 ).

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 preparation of glass; The medium-concentration product membrane separation system is used to capture CO2 in the flue gas produced during the glass production process. Part of the medium-concentration CO2 product gas produced flows into the biological carbon fixation system, and part flows into the compensation-high-concentration product membrane separation system after pressurization treatment; Biological carbon fixation system, which uses 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 compensatory-high-concentration product membrane separation system is used for secondary capture and concentration of medium-concentration CO2 product gas, and the produced high-concentration CO2 product gas is recycled to the membrane emulsification system.

2. The device for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power as claimed in 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 a 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. Then, it is 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, with 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 as claimed in claim 2, characterized in that: The temperature of the bio-heavy oil W / O emulsion is 90-160°C, and the size of the emulsified oil droplets 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 as claimed in 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 preparation raw materials to the furnace; bio-heavy oil W / O emulsion is used as furnace fuel; the furnace product is processed by forming and annealing components to obtain glass products and stored in a low-carbon glass product storage tank; the high-temperature flue gas generated is used as raw gas for the medium-concentration product membrane separation system after pretreatment.

5. The device for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power as claimed in 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 filtering and dust removal and desulfurization and denitrification treatment, and then send it to the cooling and pressurizing component for cooling and pressurizing 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 salt water.

6. The device for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power as claimed in 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 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.

7. The device for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power as claimed in claim 1, characterized in that: The biological carbon fixation system uses a gas membrane dispersed CO2 replenishment system to evenly introduce CO2 bubbles while stirring the water body, at a rate of 0.5 to 1 g 生物干重 / L 水体 The density of aquatic organisms planted is 4-8×10 -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.

8. The device for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power as claimed in 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 medium-concentration CO2 product gas flowing in 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.

9. The device for realizing low-carbon green manufacturing of glass using bio-heavy oil as fuel power as claimed in claim 1, characterized in that: Compensation - 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 during the CO2 capture process of the medium-concentration product membrane separation system.

10. 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 9, and comprises the following steps: 1) With bio-heavy oil as the continuous phase, deionized water is introduced into the CO2 aeration pressure tank, and saturated carbonic acid generated under the CO2 aeration pressure is used as the dispersed phase. The emulsifier is water. In the pressure membrane tank, the dispersed phase enters the continuous phase through the membrane pores under the CO2 gas pressure, and the CO2 gas is fully reacted with the impurities of the bio-heavy oil. The bio-heavy oil is demulsified by high-temperature static sedimentation in the high-temperature sedimentation demulsification device, and the generated salt is removed to achieve purification of the bio-heavy oil; 2) taking the purified upper layer of oil and putting it into a membrane jet emulsification device, using deionized water as the dispersed phase and water as the emulsifier, and forming a biological 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 the use of conventional diesel to complete the start-up process, the flue gas generated is filtered and dusted 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 of the medium-concentration product membrane separation system, and is concentrated once by 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 being pressurized by the pressurizing component. The residual 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, and the gas membrane dispersed CO2 supply system is used to ensure uniform CO2 bubbles, so that CO2 can fully contact with 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 the high-concentration CO2 product gas. Part of the high-concentration CO2 product gas is recycled to the membrane emulsification system, and part of it 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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