A carbon emission reduction process for deep waste heat recovery of flue gas from glass fiber kiln

Abstract

The present invention provides a carbon emission reduction process for deep waste heat recovery of flue gas from a fiberglass kiln, belonging to the technical field of waste heat recovery. The process comprises the following steps: waste heat recovery at high, medium and low temperature stages; waste heat recovery at the low temperature stage adopts a third heat exchanger, the heat exchange tube of which is a carbon steel tube, and a heat conductive anti-corrosion coating is provided on the inner wall. The preparation method comprises the following steps: 1. degreasing and rust removal of the carbon steel plate surface; 2. mixing octadecylamine, aromatic amine and heat conductive powder in a mass ratio of 1:2:2 to obtain a mixed base; 3. adding 30-50% of an organic diluent to the mixed base by mass, heating to melt, cooling to obtain a dissolving solution; 4. mixing the dissolving solution and epoxy resin in a mass ratio of 1:10 to obtain a heat conductive anti-corrosion coating; 5. applying uniformly, curing, bending into a tubular shape and welding to obtain the coating. The present invention reduces the flue gas temperature of the fiberglass kiln to below 100°C through continuous multiple heat exchanges, and the heat exchange tubes of the heat exchanger used have excellent thermal conductivity and corrosion resistance and a long service life.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste heat recovery, and in particular relates to a process for recovering carbon emissions from deep waste heat of flue gas in a fiberglass kiln. Background Art

[0002] Currently, glass production technology and equipment are constantly innovating and improving, and energy efficiency in the production process has also increased. However, the waste heat from the exhaust gas in the production process is still not well utilized. To recover the waste heat from the flue gas of the fiberglass kiln, a heat exchanger is required. In a heat exchanger, the heat exchange tubes have the important task of transferring heat, enabling efficient heat exchange between the two media. Carbon steel has become a common material for heat exchange tubes due to its relatively high thermal conductivity and certain advantages in cost control. It is widely used in heat exchange between water and steam.

[0003] The waste gas from the glass fiber (fiberglass) production process contains hydrofluoric acid (HF), sulfur dioxide (SO2) and nitrogen oxides (NO x When the temperature of these gases drops below the dew point, the water vapor in them begins to condense into water droplets, forming acid mist, also known as mixed acid. Carbon steel pipes have poor corrosion resistance in acidic media and are prone to corrosion, making them unsuitable for waste heat recovery in the low-temperature section of fiberglass kiln flue gas.

[0004] Existing announcement number is the Chinese invention patent of CN115851120A, discloses a kind of preparation method of super hydrophobic anticorrosive coating for carbon steel surface, the method is by making nano titanium powder be evenly dispersed, nano titanium powder is sheared and dispersed into polydimethylsiloxane matrix using three-roll mill, finally prepares super hydrophobic anticorrosive coating, to solve the problem that carbon steel is highly susceptible to corrosion under moist and corrosive environment. However, the thermal conductivity of polydimethylsiloxane is relatively low, and it is coated on the surface of carbon steel pipe as matrix coating, and the thermal conductivity of carbon steel pipe can be decreased, thereby causing heat exchange effect to decrease. Summary of the Invention

[0005] In order to solve the problems existing in the background technology, the present invention provides a deep waste heat recovery and carbon emission reduction process for the flue gas of a glass fiber kiln. The flue gas temperature of the glass fiber kiln is reduced to below 100°C through multiple continuous heat exchanges. The heat exchange tubes of the heat exchanger used have excellent thermal conductivity and corrosion resistance and a long service life.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A process for recovering carbon emissions from deep waste heat of flue gas from a fiberglass kiln, comprising the following steps: recovering waste heat from a high-temperature section, recovering waste heat from a medium-temperature section, and recovering waste heat from a low-temperature section;

[0008] The waste heat recovery in the low temperature section adopts a third heat exchanger. The heat exchange tube of the third heat exchanger is a carbon steel tube, and the inner wall thereof is provided with a heat-conducting and anti-corrosion coating. The preparation method is as follows:

[0009] A1. Degrease and rust the surface of the carbon steel plate to obtain a clean carbon steel plate;

[0010] A2. Mix octadecylamine, aromatic amine and thermal conductive powder in a mass ratio of 1:2:2 to obtain a mixed base;

[0011] A3. Add 30-50% of an organic diluent based on the mass of the mixed base, heat until the octadecylamine and aromatic amine melt, and cool to obtain a solution;

[0012] A4. Mix the dissolving solution and epoxy resin in a mass ratio of 1:10 to obtain a thermal conductive anti-corrosion coating;

[0013] A5. Evenly apply the thermal conductive anti-corrosion coating on the clean carbon steel plate. After it is completely dried and solidified, bend the clean carbon steel plate into a tube shape and weld it.

[0014] Furthermore, the specific steps of the deep waste heat recovery and carbon emission reduction process of the glass fiber kiln flue gas are as follows:

[0015] S1, high temperature section waste heat recovery: The flue gas of the glass fiber kiln at 1200-1500℃ is heated in the first heat exchanger by the clean air at room temperature introduced by the blower, and the temperature drops to 300-700℃;

[0016] S2, medium temperature section waste heat recovery: After the 300-700℃ glass fiber kiln flue gas exchanges heat with softened water in the second heat exchanger, the temperature drops to 150-250℃;

[0017] S3, low temperature section waste heat recovery, the glass fiber kiln flue gas with a temperature of 150-250℃ is heated in the third heat exchanger by the clean air at room temperature introduced by the second fan, and the temperature drops to below 100℃.

[0018] Furthermore, in A1, the carbon steel plate was polished with metallographic sandpaper until no obvious scratches were found on the surface, degreased with 5% NaOH solution and derusted with 10% HCl, rinsed with clean water, and dried to obtain a clean carbon steel plate.

[0019] Furthermore, in A2, the thermal conductive powder includes nano-alumina and modified magnesium oxide, and the mass ratio of the nano-alumina to the modified magnesium oxide is 1:0.8-1.2.

[0020] Furthermore, the mass ratio of the nano-alumina to the modified magnesium oxide is 1:1.

[0021] Furthermore, the preparation method of the modified magnesium oxide is as follows:

[0022] B1. Weigh 1000 mL of 1.2 mol / L magnesium chloride solution and 1000 mL of 0.6 mol / L sodium carbonate solution, heat to 70°C, and mix until completely dissolved. Add 10 g of sodium lauryl sulfate and stir for 2 min until uniform. Keep the mixture at 70°C for 1 h, then transfer to a hydrothermal reactor and react at 120°C for 1 h to obtain a precursor. Filter and dry the mixture, and calcine at 500°C for 3 h to obtain spherical magnesium oxide.

[0023] B2. Weigh 10 g of the spherical magnesium oxide, add it to 500 mL of 50% ethanol solution, add 30 g of γ-aminopropyltriethoxysilane, stir at 60 ° C for 12 h, react fully, filter the reaction product, wash it several times, and dry it to obtain modified magnesium oxide.

[0024] Furthermore, the organic diluent includes xylene and / or n-butanol.

[0025] Furthermore, the organic diluent includes xylene and n-butanol, and the mass ratio of xylene to n-butanol is 4:1.

[0026] Furthermore, the heat exchange tubes of the first heat exchanger and the second heat exchanger are both carbon steel tubes.

[0027] This application has the following beneficial effects:

[0028] 1. The present invention recovers waste heat from high temperature section, medium temperature section and low temperature section for three consecutive heat exchanges, which reduces the flue gas temperature of the fiberglass kiln to below 100°C in a step-by-step manner, fully recovers the calorific value, and enters the exhaust gas treatment system after the flue gas temperature is reduced to below 100°C, thus reducing the need for a cooling tower.

[0029] The heat exchange tubes of the heat exchanger used in the low-temperature section waste heat recovery process are carbon steel tubes, which have low manufacturing costs and excellent cost-effectiveness. In addition, they have excellent thermal conductivity, mechanical strength and wear resistance. In terms of corrosion resistance, the inner wall of the carbon steel tube is provided with a thermal conductive anti-corrosion coating, which has good thermal conductivity itself and will not significantly reduce the thermal conductivity of the carbon steel tube. At the same time, it has excellent corrosion resistance and has good acid resistance to hydrofluoric acid, sulfuric acid and nitric acid, which protects the carbon steel tube, prevents the carbon steel tube from being directly corroded by the acidic environment, and extends the service life of the carbon steel tube.

[0030] 2. In the preparation of thermally conductive anti-corrosion coatings, nano-alumina and modified magnesium oxide are mixed to produce thermally conductive powder. In terms of improving thermal conductivity, the two have synergistic capabilities and are indispensable. In addition, the preparation of spherical magnesium oxide and the modification of spherical magnesium oxide with γ-aminopropyltriethoxysilane work together to enhance the modified magnesium oxide's ability to improve thermal conductivity.

[0031] 3. The particle shape and surface of the modified magnesium oxide are smoother, with better fluidity and dispersibility. The density of the modified magnesium oxide and nano-alumina mixed is stronger, which brings better hardness, water resistance and acid resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A comparative trend diagram of thermal conductivity of the thermally conductive anti-corrosion coatings prepared in Examples 1-8 of the present invention and Comparative Examples 1-8;

[0033] Figure 2 This is an SEM image of the thermally conductive powder (including nano-alumina and modified magnesium oxide) in Example 1 of the present invention;

[0034] Figure 3 This is an SEM image of the thermally conductive powder (including nano-alumina and commercially available magnesium oxide) in Comparative Example 1 of the present invention. DETAILED DESCRIPTION

[0035] The present application is further described in detail below with reference to the embodiments.

[0036] Unless otherwise specified, the raw materials used in the examples and comparative examples of the present application are all commercially available.

[0037] Example 1

[0038] A process for recovering carbon emissions from deep waste heat of flue gas from a fiberglass kiln, comprising the following steps:

[0039] S1, high temperature section waste heat recovery: The flue gas of the glass fiber kiln with a temperature of 1200-1500℃ is heat-exchanged with the clean air at room temperature introduced by the blower in the first heat exchanger, and the temperature drops to 300-700℃; the clean air at room temperature is heated to 250-400℃ and passed into the drying oven for utilization.

[0040] S2, medium temperature section waste heat recovery: After the 300-700℃ glass fiber kiln flue gas exchanges heat with softened water in the second heat exchanger, the temperature drops to 150-250℃; the softened water heats up to form steam, part of which enters the workshop for production, and the other part enters the drying oven for utilization.

[0041] S3, low temperature section waste heat recovery, the glass fiber kiln flue gas with a temperature of 150-250℃ is heated in the third heat exchanger with the clean air at room temperature introduced by the second fan, and the temperature drops to below 100℃; the clean air at room temperature is heated to below 150℃ and passed into the second drying oven for utilization.

[0042] The heat exchange tubes in the first, second, and third heat exchangers are all carbon steel tubes, which offer excellent thermal conductivity, typically ranging from 50-70 W / (m·K). Because the waste gas from the glass fiber (fiberglass) production process contains hydrofluoric acid (HF), sulfur dioxide (SO2), and nitrogen oxides (NOx), when the temperature of these gases drops below the dew point, the water vapor within them begins to condense into water droplets, forming acid mist (or mixed acid), which can corrode the carbon steel tubes. Therefore, the inner walls of the heat exchange tubes in the third heat exchanger are coated with a thermally conductive, anti-corrosion coating.

[0043] The preparation method of the heat exchange tube of the third heat exchanger is as follows:

[0044] A1. Use metallographic sandpaper to polish the cut carbon steel plate until there are no obvious scratches on the surface. Use 5% NaOH solution to remove oil and 10% HCL to remove rust. Rinse with clean water and dry to obtain a clean carbon steel plate.

[0045] A2. Mix octadecylamine, aromatic amine and thermal conductive powder in a mass ratio of 1:2:2 to obtain a mixed base.

[0046] The thermal conductive powder includes nano-alumina and modified magnesium oxide, and the mass ratio of the nano-alumina to the modified magnesium oxide is 1:1.

[0047] Nano-alumina was purchased from Brofos Nano-Technology Co., Ltd.; model: Brofos-Al2O3-Q30.

[0048] The preparation method of modified magnesium oxide is:

[0049] Weigh 1000 mL of 1.2 mol / L magnesium chloride solution and 1000 mL of 0.6 mol / L sodium carbonate solution, heat to 70°C, mix after complete dissolution, add 10 g of sodium dodecyl sulfate, stir for 2 minutes until uniform, keep at 70°C for 1 hour, then transfer to a hydrothermal reactor, react at 120°C for 1 hour to obtain a precursor, filter and dry, and calcine at 500°C for 3 hours to obtain spherical magnesium oxide;

[0050] Weigh 10 g of the spherical magnesium oxide, add it to 500 mL of 50% ethanol solution, add 30 g of γ-aminopropyltriethoxysilane, stir at 60° C. for 12 h, react fully, filter the reaction product, wash it several times, and dry it to obtain modified magnesium oxide.

[0051] A3. Add 40% of an organic diluent, based on the mass of the mixed base, to the mixed base, heat until the octadecylamine and the aromatic amine are melted, and cool to obtain a solution; wherein the organic diluent includes xylene and n-butanol, and the mass ratio of xylene to n-butanol is 4:1.

[0052] A4. Mix the dissolving liquid and epoxy resin in a mass ratio of 1:10 to obtain a thermal conductive anti-corrosion coating.

[0053] A5. Apply the thermal conductive anti-corrosion coating evenly on the clean carbon steel plate. After it is completely dry and solidified, a thermal conductive anti-corrosion coating is formed. Bend the carbon steel plate into a tube and weld it.

[0054] Example 2

[0055] The only difference between this embodiment and embodiment 1 is that the mass ratio of nano-alumina to modified magnesium oxide is 1:0.8.

[0056] Example 3

[0057] The only difference between this embodiment and embodiment 1 is that the mass ratio of nano-alumina to modified magnesium oxide is 1:1.2.

[0058] Example 4

[0059] The only difference between this embodiment and embodiment 1 is that in A3, 30% of an organic diluent is added to the mixed base based on the mass of the mixed base.

[0060] Example 5

[0061] The only difference between this embodiment and embodiment 1 is that in A3, 50% of an organic diluent is added to the mixed base based on the mass of the mixed base.

[0062] Example 6

[0063] The only difference between this embodiment and embodiment 1 is that the organic diluent is xylene.

[0064] Example 7

[0065] The only difference between this embodiment and embodiment 1 is that the organic diluent is n-butanol.

[0066] Example 8

[0067] The only difference between this embodiment and embodiment 1 is that the organic diluent includes xylene and n-butanol, and the mass ratio of xylene to n-butanol is 2:1.

[0068] Comparative Example 1

[0069] The only difference between this embodiment and embodiment 1 is that the modified magnesium oxide is replaced by magnesium oxide, that is, commercially available magnesium oxide is directly purchased and ground before use. Specifically, magnesium oxide was purchased from Weifang Xinchuang Chemical Co., Ltd.

[0070] Comparative Example 2

[0071] The only difference between this comparative example and Example 1 is that the modified magnesium oxide is replaced by homemade spherical magnesium oxide.

[0072] Specifically, 1000 mL of 1.2 mol / L magnesium chloride solution and 1000 mL of 0.6 mol / L sodium carbonate solution were weighed respectively, heated to 70°C, and after complete dissolution, mixed, and 10 g of sodium lauryl sulfate was added thereto, stirred for 2 minutes until uniform, kept still at 70°C for 1 hour, and then transferred to a hydrothermal kettle, reacted at 120°C for 1 hour to obtain a precursor, filtered and dried, and calcined at 500°C for 3 hours to obtain spherical magnesium oxide.

[0073] Comparative Example 3

[0074] The only difference between this comparative example and Example 1 is that during the preparation of the modified magnesium oxide, γ-aminopropyltriethoxysilane is replaced by 3-aminopropyltrimethoxysilane.

[0075] Specifically, 1000 mL of 1.2 mol / L magnesium chloride solution and 1000 mL of 0.6 mol / L sodium carbonate solution were weighed, heated to 70°C, and after complete dissolution, mixed, and 10 g of sodium lauryl sulfate was added thereto, stirred for 2 minutes until uniform, kept at 70°C for 1 hour, and then transferred to a hydrothermal kettle and reacted at 120°C for 1 hour to obtain a precursor, which was filtered and dried, and calcined at 500°C for 3 hours to obtain spherical magnesium oxide;

[0076] Weigh 10 g of the spherical magnesium oxide, add it to 500 mL of 50% ethanol solution, add 30 g of 3-aminopropyltrimethoxysilane, stir at 60° C. for 12 h, react fully, filter the reaction product, wash it several times, and dry it to obtain modified magnesium oxide.

[0077] Comparative Example 4

[0078] The only difference between this comparative example and Example 1 is that the modified magnesium oxide is deleted.

[0079] Specifically, the thermal conductive powder is only single nano-aluminum oxide.

[0080] Comparative Example 5

[0081] The only difference between this comparative example and Example 1 is that the nano-alumina is deleted.

[0082] Specifically, the thermally conductive powder is only a single modified magnesium oxide.

[0083] Comparative Example 6

[0084] The only difference between this comparative example and Example 1 is that nano-alumina is replaced by nano-zirconium oxide.

[0085] Comparative Example 7

[0086] The only difference between this comparative example and Example 1 is that the aromatic amine is deleted.

[0087] Specifically, in A2, octadecylamine and thermal conductive powder are mixed in a mass ratio of 3:2 to obtain a mixed base.

[0088] Comparative Example 8

[0089] The only difference between this comparative example and Example 1 is that octadecylamine is deleted.

[0090] Specifically, in A2, aromatic amine and thermal conductive powder are mixed in a mass ratio of 3:2 to obtain a mixed base.

[0091] Test Example 1

[0092] Test item: thermal conductivity test.

[0093] Test objects: Thermal conductive anti-corrosion coatings were prepared according to Examples 1-8 and Comparative Examples 1-8.

[0094] Test method: The thermal conductivity coefficient was determined according to ASTM E1530-11 using a 2022 thermal conductivity meter from Anter Company, USA. Two samples were taken, and each sample was repeated twice. The average value was calculated as the test result.

[0095] Test results: See Table 1.

[0096] Table 1. Thermal conductivity of thermally conductive anti-corrosion coatings obtained from Examples 1-8 and Comparative Examples 1-8

[0097]

[0098]

[0099] Result analysis: Analyze Examples 1-8 and Comparative Examples 1-8 and combine the data in Table 1 and Figure 1 It can be seen that the thermal conductivity of the thermally conductive anti-corrosion coatings obtained in Examples 1-8 is good, with Example 1 being the best example. Nano-alumina and modified magnesium oxide are mixed to obtain thermally conductive powder. In terms of improving thermal conductivity, the two have synergistic capabilities and are indispensable. In addition, the preparation of spherical magnesium oxide and the modification of spherical magnesium oxide by γ-aminopropyltriethoxysilane work together to enhance the ability of modified magnesium oxide to improve thermal conductivity. Simply replacing γ-aminopropyltriethoxysilane with 3-aminopropyltrimethoxysilane, which has similar performance, does not increase but decrease the improvement in thermal conductivity of the modified spherical magnesium oxide, indicating that γ-aminopropyltriethoxysilane cannot be simply replaced by an ordinary coupling agent. Single octadecylamine and single aromatic amine work synergistically, and the lack of either one will lead to a decrease in thermal conductivity.

[0100] Test Example 2

[0101] Test item: acid resistance test.

[0102] Test objects: Thermal conductive anti-corrosion coatings were prepared according to Examples 1-8 and Comparative Examples 1-8.

[0103] Test results: The thermal conductive anti-corrosion coatings prepared in Examples 1-8 and Comparative Examples 1-8 were coated on the surface of carbon steel plates, and the performance of each coating was tested. The results are shown in Table 2.

[0104] Note: 1. In the water resistance test, if there is no rust within 60 days, stop the test and record it with "-". If rust occurs within 60 days, record the time of the first rust.

[0105] 2. Acid resistance: a1-40% by mass hydrofluoric acid, a2-50g / L by volume sulfuric acid, a3-68% by volume nitric acid. If no rust occurs within 96 hours, stop the test and record it with a "-". If rust occurs within 96 hours, record the time of initial rust.

[0106] Table 2. Performance test data in Test Example 2

[0107]

[0108] Result analysis: From the data in Table 2, it can be seen that the modified magnesium oxide and nano-alumina are mixed and used to synergistically improve the adhesion, hardness, water resistance and acid resistance of the coating; combined with Figure 2 and Figure 3 The inventors speculate that this may be because the modified magnesium oxide has a smoother particle surface, better fluidity and dispersibility than ordinary commercially available magnesium oxide, and the modified magnesium oxide and nano-alumina are more densely mixed, which in turn brings better hardness, water resistance and acid resistance.

[0109] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0110] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A process for recovering carbon emissions from deep waste heat of flue gas from a glass fiber kiln, characterized in that: The process includes the following steps: high temperature section waste heat recovery, medium temperature section waste heat recovery and low temperature section waste heat recovery; The waste heat recovery in the low temperature section adopts a third heat exchanger. The heat exchange tube of the third heat exchanger is a carbon steel tube, and the inner wall thereof is provided with a heat-conducting and anti-corrosion coating. The preparation method is as follows: A1. Degrease and rust the surface of the carbon steel plate to obtain a clean carbon steel plate; A2. Mix octadecylamine, aromatic amine and thermal conductive powder in a mass ratio of 1:2:2 to obtain a mixed base; A3. Add 30-50% of an organic diluent, based on the mass of the mixed base, and heat until the octadecylamine and aromatic amine are melted. Cool and obtain a solution. A4. Mix the dissolving solution and epoxy resin in a mass ratio of 1:10 to obtain a thermal conductive anti-corrosion coating; A5. Evenly apply the thermal conductive anti-corrosion coating on the clean carbon steel plate. After it is completely dried and solidified, bend the clean carbon steel plate into a tube shape and weld it. In A2, the thermal conductive powder includes nano-alumina and modified magnesium oxide, and the mass ratio of the nano-alumina to the modified magnesium oxide is 1:0.8-1.2; The preparation method of the modified magnesium oxide is as follows: B1. Weigh 1000 mL of 1.2 mol / L magnesium chloride solution and 1000 mL of 0.6 mol / L sodium carbonate solution, heat to 70°C, and mix until completely dissolved. Add 10 g of sodium lauryl sulfate and stir for 2 min until uniform. Keep the mixture at 70°C for 1 h, then transfer to a hydrothermal reactor and react at 120°C for 1 h to obtain a precursor. Filter and dry the mixture, and calcine at 500°C for 3 h to obtain spherical magnesium oxide. B2. Weigh 10 g of the spherical magnesium oxide, add it to 500 mL of 50% ethanol solution, add 30 g of γ-aminopropyltriethoxysilane, stir at 60 ° C for 12 h, react fully, filter the reaction product, wash it several times, and dry it to obtain modified magnesium oxide.

2. The process for recovering carbon emissions from deep waste heat of flue gas from glass fiber kiln according to claim 1 is characterized in that: The specific steps are as follows: S1, high temperature section waste heat recovery: The flue gas of the glass fiber kiln at 1200-1500℃ is heated in the first heat exchanger by the clean air at room temperature introduced by the blower, and the temperature drops to 300-700℃; S2, medium temperature section waste heat recovery: After the 300-700℃ glass fiber kiln flue gas exchanges heat with softened water in the second heat exchanger, the temperature drops to 150-250℃; S3, low temperature section waste heat recovery, the glass fiber kiln flue gas with a temperature of 150-250℃ is heated in the third heat exchanger by the clean air at room temperature introduced by the second fan, and the temperature drops to below 100℃.

3. The process for recovering carbon emissions from deep waste heat of flue gas from glass fiber kiln according to claim 1 or 2, characterized in that: In A1, the carbon steel plate was polished with metallographic sandpaper until there were no obvious scratches on the surface, degreased with 5% NaOH solution and derusted with 10% HCL, rinsed with clean water, and dried to obtain a clean carbon steel plate.

4. The process for recovering carbon emissions from deep waste heat of flue gas from glass fiber kiln according to claim 1 is characterized in that: The mass ratio of the nano-alumina to the modified magnesium oxide is 1:

1.

5. The process for recovering carbon emissions from deep waste heat of flue gas from glass fiber kiln according to claim 1 is characterized in that: The organic diluent includes xylene and / or n-butanol.

6. The process for recovering carbon emissions from deep waste heat of flue gas from glass fiber kiln according to claim 5 is characterized in that: The organic diluent includes xylene and n-butanol, and the mass ratio of xylene to n-butanol is 4:

1.

7. The process for recovering carbon emissions from deep waste heat of flue gas from glass fiber kiln according to claim 2, characterized in that: The heat exchange tubes of the first heat exchanger and the second heat exchanger are both carbon steel tubes.

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