Application of terahertz materials in reducing nitrogen oxides and volatile organic compounds

Abstract

The present invention discloses the application of terahertz materials to reduce nitrogen oxides and volatile organic compounds, including the following steps: step A: activating fuel using terahertz material A; step B: activating combustion-supporting gas using terahertz material B; step C: delivering the activated combustion-supporting gas and fuel to a combustion device for combustion and heat release, and delivering the exhaust gas after combustion to an exhaust gas detection system for detection of exhaust gas components, and discharging after meeting the standards. This application method of the present invention can effectively improve the use efficiency of terahertz materials, so that when a single ton of fuel source is burned, the use of terahertz materials is relatively small, and the emission reduction effect of nitrogen oxides and volatile organic compounds can be achieved, and the terahertz materials have a long service life.

Description

Technical Field

[0001] The present invention relates to the technical field of terahertz materials, and more particularly to the application of terahertz materials in reducing nitrogen oxides and volatile organic compounds. Background Art

[0002] At present, according to domestic literature, based on the excellent characteristics of terahertz waves and the development of related technologies, terahertz materials have been applied to the purification of fuel exhaust. Ding Xueguang invented a terahertz material patch for energy saving and emission reduction of gasoline vehicles, and proposed a solution to the problem that terahertz materials in the exhaust pipes of gasoline vehicles are not easy to adsorb and remove emissions. Chen Liancong prepared a terahertz oil activation additive that can improve the combustion efficiency of oil and achieve the purpose of energy saving and emission reduction; Hou Wenhao and others prepared a terahertz material for gasoline vehicles to reduce emissions and save fuel. After calculation, the energy conversion rate of gasoline was increased by up to 47-50%. Yao Kui and others invented a terahertz negative ion strong magnetic fuel-saving rod. The fuel-saving rod formed by combining multiple materials releases terahertz waves to generate high-frequency vibrations, improves the combustion value of oil, and achieves fuel-saving effects.

[0003] The above literature has proved that terahertz materials can improve fuel combustion value and reduce harmful substance emissions during the combustion of mobile source fuels, but there is no report on the method of applying terahertz materials to the exhaust purification of fixed source fuels. Since the emission reduction effect of terahertz materials on nitrogen oxides and volatile organic compounds when used in fuels is closely related to the application method of terahertz materials, it is necessary to design an application method of terahertz materials so that terahertz materials can fully play their role in reducing nitrogen oxides and volatile organic compound emissions in actual application scenarios, and minimize the nitrogen oxides and volatile organic compounds released by fuel combustion. Summary of the invention

[0004] To this end, the technical problem to be solved by the present invention is to provide an application of terahertz materials to reduce nitrogen oxides and volatile organic compounds, so as to solve the problem that the existing terahertz materials cannot fully exert the emission reduction effect when used for reducing nitrogen oxides and volatile organic compounds in mobile source and fixed source fuel combustion.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The application of terahertz materials to reduce nitrogen oxides and volatile organic compounds includes the following steps:

[0007] Step A: activating the fuel using terahertz material A;

[0008] Step B: activating the combustion-supporting gas using the terahertz material B;

[0009] Step C: The activated combustion-supporting gas and fuel are transported to the combustion device for combustion and heat release, and the exhaust gas after combustion is sent to the exhaust gas detection system for detection of exhaust gas components, and discharged after meeting the standards.

[0010] The above-mentioned terahertz material is used to reduce nitrogen oxides and volatile organic compounds. In step A, the terahertz material A and the terahertz material B are both prepared by mixing silicon dioxide, ferric oxide, calcium tungstate and a terahertz active additive and then sintering.

[0011] The above-mentioned terahertz material is used to reduce nitrogen oxides and volatile organic compounds, and the terahertz active additive is graphene oxide bonded silica gel and / or nano silicon-based oxide.

[0012] The above-mentioned terahertz material is used to reduce nitrogen oxides and volatile organic compounds. Terahertz material A and terahertz material B are both made by mixing the following components in weight parts and then sintering: 20-50 weight parts of silicon dioxide, 10-25 weight parts of ferric oxide, 10-20 weight parts of calcium tungstate, 3-10 weight parts of graphene oxide bonded silica gel, and 5-15 weight parts of nano silicon-based oxide.

[0013] The above-mentioned terahertz material is used to reduce nitrogen oxides and volatile organic compounds. Terahertz material A and terahertz material B are both made by mixing the following components in weight and sintering them: 40 parts by weight of silicon dioxide, 10 parts by weight of ferric oxide, 10 parts by weight of calcium tungstate, 4 parts by weight of graphene oxide bonded silica gel and 8 parts by weight of nano silicon-based oxide.

[0014] The above-mentioned terahertz materials are used to reduce the application of nitrogen oxides and volatile organic compounds. Silicon dioxide, ferric oxide and calcium tungstate are all sieved through a 200-mesh sieve.

[0015] The above terahertz materials are used to reduce nitrogen oxides and volatile organic compounds. The structural formula of nano silicon-based oxide is SiO 2-X , X is between 0.4 and 0.8; the specific surface area of ​​nano-silicon-based oxide is greater than 550m 2 / g.

[0016] The above-mentioned terahertz material is used to reduce nitrogen oxides and volatile organic compounds. The terahertz powder obtained after sintering is first heated to 2.3×10 11 The radiation treatment was carried out for 3 h at 5.5×10 11 The radiation treatment was carried out for 2 h at 2.3×10 12 The radiation treatment was carried out for 2 h at 5.5×10 12 The terahertz material A was prepared by irradiation treatment at 2.3×10 11 The radiation treatment was carried out for 3 h at 5.5×1011 After irradiation treatment for 2 hours at this frequency band, terahertz material B was prepared.

[0017] The above-mentioned terahertz material is used to reduce nitrogen oxides and volatile organic compounds. The fuel in step A is gasoline, diesel, coal gas or coal.

[0018] The above terahertz material is used to reduce nitrogen oxides and volatile organic compounds, and the combustion-supporting gas in step B is oxygen or air.

[0019] The technical solution of the present invention achieves the following beneficial technical effects:

[0020] 1. The application of the terahertz material of the present invention is to treat the fuel and the combustion-supporting gas with the terahertz material before the fuel is burned, so as to give full play to the activation effect of the terahertz material on the fuel and the combustion-supporting gas, improve the emission reduction effect of nitrogen oxides in the fuel tail gas, and effectively improve the use efficiency of the terahertz material, so that when a single ton of fuel source is burned, the use amount of terahertz material is small, and the emission reduction effect of nitrogen oxides and volatile organic compounds can be achieved. In addition, the terahertz material can be recycled and has a long service life.

[0021] 2. The present invention uses terahertz materials irradiated with terahertz waves of different frequency bands to activate fuel and combustion-supporting gas respectively, which has a better activation effect than terahertz materials treated with a single irradiation condition. This is mainly because the terahertz materials irradiated with terahertz waves of different frequency bands in the present invention can ensure that the emitted terahertz waves are close to the vibration frequency of the fuel and combustion-supporting gas molecules to enhance the activity of the fuel molecules and the combustion-supporting gas molecules, thereby enabling the molecules of the fuel and the combustion-supporting gas to burn in a fully excited state, which is beneficial to the full combustion of the fuel and reduces the generation of nitrogen oxides and volatile organic compounds. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic flow chart of the application of terahertz materials to reduce nitrogen oxides and volatile organic compounds in Example 1 of the present invention. DETAILED DESCRIPTION

[0023] Example 1

[0024] In this embodiment, the application of terahertz materials in reducing nitrogen oxides and volatile organic compounds is as follows: Figure 1 As shown, the following steps are included:

[0025] Step A: activating the fuel using terahertz material A, the fuel being boiler coal;

[0026] Step B: activating the combustion-supporting gas by using the terahertz material B, where the combustion-supporting gas is air;

[0027] Terahertz material A and terahertz material B are prepared by mixing 40 parts by weight of silicon dioxide, 10 parts by weight of ferric oxide, 10 parts by weight of calcium tungstate, 4 parts by weight of graphene oxide bonded silica gel and 8 parts by weight of nano silicon-based oxide and then sintering; silicon dioxide, ferric oxide and calcium tungstate are all sieved through a 200-mesh sieve; graphene oxide bonded silica gel is prepared by the method in patent CN104489922A; the nano silicon-based oxide used is a commercially available silicon dioxide nano-scale substance with a specific surface area greater than 550 m 2 / g, its structural formula is SiO 2-X , X is between 0.4 and 0.8;

[0028] The terahertz powder obtained after sintering was first heated to 2.3×10 11 The radiation treatment was carried out for 3 h at 5.5×10 11 The radiation treatment was carried out for 2 h at 2.3×10 12 The radiation treatment was carried out for 2 h at 5.5×10 12 After irradiation treatment at the frequency band for 1 hour, terahertz material A was prepared;

[0029] The terahertz powder obtained after sintering was first heated to 2.3×10 11 The radiation treatment was carried out for 3 h at 5.5×10 11 After irradiation treatment for 2 hours at the frequency band, terahertz material B was prepared;

[0030] Step C: The activated combustion-supporting gas and fuel are transported to the combustion device for combustion and heat release, and the exhaust gas after combustion is sent to the exhaust gas detection system for detection of exhaust gas components, and discharged after meeting the standards.

[0031] After testing, the content of nitrogen oxides in the tail gas after the coal combustion in the boiler of this embodiment is 63mg / m 3 , which is much lower than the 200mg / m specified in GB13271-2022 "Boiler Air Pollutant Emission Standard" 3 ; The content of volatile organic matter in the exhaust gas is 19mg / m 3 .

[0032] Comparative Example 1

[0033] The difference between the application of terahertz materials to reduce nitrogen oxides and volatile organic compounds in this comparative example and that in Example 1 is that terahertz material A and terahertz material B are respectively loaded into the burner so that terahertz material A and terahertz material B are irradiated during the combustion process of fuel and combustion-supporting gas, and the other steps are the same as in Example 1.

[0034] After testing, the content of nitrogen oxides in the tail gas of the comparative boiler after coal combustion is 187mg / m 3, slightly lower than the 200mg / m specified in GB13271-2022 "Boiler Air Pollutant Emission Standard" 3 ; The content of volatile organic matter in the exhaust gas is 55mg / m 3 The amount of terahertz material used when burning a single ton of fuel source is significantly higher than that of Comparative Example 1.

[0035] Comparative Example 2

[0036] The difference between the application of terahertz materials in this comparative example to reduce nitrogen oxides and volatile organic compounds and that in Example 1 is that when preparing terahertz materials A and B, the irradiation conditions are the same, that is, firstly at 2.3×10 11 The radiation treatment was carried out for 3 h at 5.5×10 11 The radiation treatment was carried out for 2 h at 2.3×10 12 The radiation treatment was carried out for 2 h at 5.5×10 12 Radiation treatment under the frequency band for 1h.

[0037] After testing, the content of nitrogen oxides in the tail gas of the comparative boiler after coal combustion is 106mg / m 3 , lower than 200mg / m specified in GB13271-2022 "Boiler Air Pollutant Emission Standard" 3 ; The content of volatile organic matter in the exhaust gas is 32mg / m 3 The amount of terahertz material used when burning a single ton of fuel source is higher than that of Example 1.

[0038] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. Application of terahertz materials to reduce nitrogen oxides and volatile organic compounds, characterized in that: The steps include: Step A: activating the fuel using terahertz material A; Step B: activating the combustion-supporting gas using the terahertz material B; Step C: transporting the activated combustion-supporting gas and fuel to a combustion device for combustion and heat release, and sending the exhaust gas after combustion to an exhaust gas detection system for detection of exhaust gas components, and discharging the exhaust gas after meeting the standards; The terahertz material A in step A and the terahertz material B in step B are both prepared by mixing silicon dioxide, ferric oxide, calcium tungstate and a terahertz active additive and then sintering; The terahertz powder obtained after sintering was first heated to 2.3×10 11 The radiation treatment was carried out for 3 h at 5.5×10 11 The radiation treatment was carried out for 2 h at 2.3×10 12 The radiation treatment was carried out for 2 h at 5.5×10 12 After irradiation treatment at the frequency band for 1 hour, terahertz material A was prepared; The terahertz powder obtained after sintering was first heated to 2.3×10 11 The radiation treatment was carried out for 3 h at 5.5×10 11 After irradiation treatment for 2 hours at the frequency band, terahertz material B was prepared; The terahertz active auxiliary agent is graphene oxide bonded silica gel and / or nano silicon-based oxide.

2. The use of terahertz materials to reduce nitrogen oxides and volatile organic compounds according to claim 1, characterized in that: Terahertz material A and terahertz material B are both made by mixing the following components in parts by weight and then sintering: 20-50 parts by weight of silicon dioxide, 10-25 parts by weight of ferric oxide, 10-20 parts by weight of calcium tungstate, 3-10 parts by weight of graphene oxide bonded silica gel, and 5-15 parts by weight of nano silicon-based oxide.

3. The use of terahertz materials to reduce nitrogen oxides and volatile organic compounds according to claim 2, characterized in that: Terahertz material A and terahertz material B are both made by mixing and sintering the following components in parts by weight: 40 parts by weight of silicon dioxide, 10 parts by weight of ferric oxide, 10 parts by weight of calcium tungstate, 4 parts by weight of graphene oxide bonded silica gel and 8 parts by weight of nano silicon-based oxide.

4. The use of terahertz materials to reduce nitrogen oxides and volatile organic compounds according to claim 2, characterized in that: Silicon dioxide, ferric oxide and calcium tungstate were all sieved through a 200-mesh sieve.

5. The use of terahertz materials to reduce nitrogen oxides and volatile organic compounds according to claim 2, characterized in that: The structural formula of nano silicon-based oxide is SiO 2-X , X is between 0.4 and 0.8; the specific surface area of ​​nano-silicon-based oxide is greater than 550m 2 / g.

6. The use of terahertz materials to reduce nitrogen oxides and volatile organic compounds according to claim 1, characterized in that: The fuel in step A is gasoline, diesel, coal gas or coal.

7. The use of terahertz materials to reduce nitrogen oxides and volatile organic compounds according to claim 1, characterized in that: The combustion-supporting gas in step B is oxygen or air.

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