CN120059817B - A coal-saving, desulfurizing and decoking catalyst for boilers and its application method - Google Patents

A coal-saving, desulfurizing and decoking catalyst for boilers and its application method

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Publication number
CN120059817B
CN120059817B CN202510217693.8A CN202510217693A CN120059817B CN 120059817 B CN120059817 B CN 120059817B CN 202510217693 A CN202510217693 A CN 202510217693A CN 120059817 B CN120059817 B CN 120059817B
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coal
catalyst
saving
desulfurization
decoking
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CN120059817A (en
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魏金
张晓雪
石宝忠
王胜涛
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Shaanxi Jiutai Tengfei Chemical Materials Co ltd
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Shaanxi Jiutai Tengfei Chemical Materials Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L9/00—Treating solid fuels to improve their combustion
    • C10L9/10—Treating solid fuels to improve their combustion by using additives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L10/00—Use of additives to fuels or fires for particular purposes
    • C10L10/02—Use of additives to fuels or fires for particular purposes for reducing smoke development
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L10/00—Use of additives to fuels or fires for particular purposes
    • C10L10/04—Use of additives to fuels or fires for particular purposes for minimising corrosion or incrustation
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L10/00—Use of additives to fuels or fires for particular purposes
    • C10L10/06—Use of additives to fuels or fires for particular purposes for facilitating soot removal
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L9/00—Treating solid fuels to improve their combustion
    • C10L9/10—Treating solid fuels to improve their combustion by using additives
    • C10L9/12—Oxidation means, e.g. oxygen-generating compounds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)

Abstract

本发明提供了一种锅炉用节煤脱硫除焦催化剂及其应用方法，通过多组分协同作用，能够在锅炉运行过程中同时实现节煤、脱硫、除焦、防腐及清灰功能，有效解决现有技术中功能单一、脱硫效率低、除焦效果差及适应性不足的问题。通过脱硫催化剂中和烟气硫氧化物，减少低温结渣，温敏膨胀颗粒动态膨胀剥离硬质结焦，多孔载体颗粒吸附灰渣和复盐，高温滞留松动剂与催化剂协同防止二次积聚，改善传热条件，提高锅炉热效率，节煤剂降低燃料消耗，金属保护剂在受热面形成防腐膜，延长设备寿命，显著提升锅炉运行经济性。

The present invention provides a coal-saving, desulfurization, and decoking catalyst for boilers and an application method thereof. Through the synergistic effect of multiple components, the catalyst can simultaneously achieve coal-saving, desulfurization, decoking, corrosion protection, and ash cleaning functions during boiler operation, effectively solving the problems of single function, low desulfurization efficiency, poor decoking effect, and insufficient adaptability in the prior art. The desulfurization catalyst neutralizes sulfur oxides in flue gas, reducing low-temperature slagging. The temperature-sensitive expansion particles dynamically expand and peel off hard coke. The porous carrier particles adsorb ash and complex salts. The high-temperature retention loosening agent and the catalyst work together to prevent secondary accumulation, improve heat transfer conditions, and increase boiler thermal efficiency. The coal-saving agent reduces fuel consumption. The metal protective agent forms an anti-corrosion film on the heated surface, extending the life of the equipment and significantly improving the economic efficiency of boiler operation.

Description

Coal-saving desulfurization decoking catalyst for boiler and application method thereof
Technical Field
The invention belongs to the field of chemical industry, and in particular relates to a coal-saving desulfurization decoking catalyst for a boiler and an application method thereof.
Background
The boiler is used as an important heat energy conversion device and is widely applied to the fields of electric power, chemical industry, petrochemical industry, metallurgy, civil heat supply and the like. However, during the operation of the boiler, since the flue gas generated after the combustion of the fuel contains sulfides (such as sulfur dioxide SO 2 and sulfur trioxide SO 3), ash and other impurities, these substances can form different types of clinker and coking on the high and low temperature heating surfaces of the boiler. The formation of the clinker and the coking not only can obviously reduce the thermal efficiency of the boiler and increase the fuel consumption, but also can cause corrosion and loss to the heating surface and other key parts of the boiler, and seriously affect the running performance, the economy and the service life of the boiler equipment.
In the low temperature region (such as an economizer), sulfur oxides (SO 2、SO3) in the flue gas react with water vapor to form sulfates and form adherent wet slag bonding, while in the high temperature region (such as a hearth heating surface), ash and sulfides in the fuel form low-melting salts and form hard coking. These deposits significantly increase the thermal resistance of the heated surfaces and reduce boiler efficiency.
At present, common solutions to the problems of boiler slagging and coking include mechanical ash removal and chemical ash removal. Mechanical ash removal is carried out by a soot blower or manual knocking to remove ash on a heating surface, is suitable for loose ash, has limited effect of removing high-temperature hard coking, has high labor intensity and is easy to damage the surface of equipment. The chemical ash remover decomposes slag formation and coking through chemical reaction, but the existing ash remover product is single in function and is difficult to meet various requirements of desulfurization, decoking, corrosion prevention and the like. In addition, part of the chemical ash remover has certain corrosiveness to boiler materials, and the long-term use of the chemical ash remover can shorten the service life of equipment and reduce the overall operation economy of the boiler. Meanwhile, the ash remover has poor adaptability to different types of fuel boilers, is difficult to cope with complex operation conditions and has limited use effect.
The prior art has the limitations of low desulfurization efficiency, poor decoking effect, large fuel consumption, insufficient corrosion resistance, poor adaptability and the like when solving the problems of boiler clinker and coking. Therefore, developing a high-efficiency, coal-saving, low-corrosion and wide-applicability agent for saving coal, desulfurizing and removing Jiao Cuihua for a boiler can effectively remove slag and coking, improve the thermal efficiency of the boiler, reduce the fuel consumption and prolong the service life of equipment, and becomes an urgent need in the field.
Disclosure of Invention
The invention provides a coal-saving desulfurization decoking catalyst for a boiler and an application method thereof, which can effectively solve the problems of low-temperature wet slag formation, high-temperature hard coking, double salt adhesion and the like generated by fuel combustion in the operation process of the boiler. The catalyst comprehensively realizes the functions of saving coal, desulfurizing, decoking, corrosion prevention and ash removal by combining physical adsorption and dynamic stripping, can obviously improve the thermal efficiency of the boiler, reduce the fuel consumption, and can also prolong the ash removal period of the boiler and prolong the service life of equipment.
In order to solve the technical problems, the embodiment of the invention discloses the following technical scheme:
The invention provides a coal-saving desulfurization Jiao Cuihua-10% agent for a boiler, which comprises, by weight, 6-10% of a metal protecting agent, 10-15% of an oxidizing agent, 12-20% of a desulfurization catalyst, 8-12% of porous carrier particles, 15-21% of temperature-sensitive expansion particles, 12-18% of a high Wen Zhiliu loosening agent, 6-11% of an accelerator, 15-20% of a catalyst, 5-10% of an oxygen increasing agent and 6-12% of a coal-saving agent.
Preferably, the metal protecting agent is one or more of copper carbonate, barium sulfate and zinc phosphate.
Preferably, the oxidant is one or more of potassium permanganate and sodium nitrate.
Preferably, the desulfurization catalyst is one or more of magnesium oxide and sodium carbonate.
Preferably, the porous carrier particles are one or more of zeolite and active carbon, the specific surface area is 50-150m 2/g, the pore diameter range is 0.3-1.2nm, and the particle size range is 50-150 mu m.
Preferably, the temperature-sensitive expansion particles are calcium carbonate coated with aluminum oxide on the surface, the coating thickness is 2-8 mu m, and the particle size range is 50-150 mu m.
Preferably, the high-temperature retention loosening agent is one or more of borax, sodium carbonate and sodium bicarbonate.
Preferably, the promoter is one or more of ammonium sulfate and potassium chloride.
Preferably, the catalyst is one or more of sodium metasilicate, aluminum silicate and silicon dioxide.
Preferably, the oxygenation agent is one or more of calcium oxide and potassium nitrate.
Preferably, the coal saving agent is one or more of sodium sulfate and lithium carbonate.
The invention also provides an application method of the coal-saving desulfurization and decoking catalyst for the boiler, which comprises the step of adding and distributing the coal-saving desulfurization and decoking catalyst for the boiler in the boiler according to 0.02-0.06% of the fuel amount.
Preferably, the coal-saving desulfurization decoking catalyst for the boiler is added and distributed in the boiler according to the amount of 0.02-0.06 percent of fuel, and comprises the steps of adding the coal-saving desulfurization decoking catalyst for the boiler Jiao Cuihua agent into a coal conveying belt and mixing the coal conveying belt with fuel coal, grinding the coal conveying belt into powder through a coal mill, and then feeding the pulverized coal into a hearth along with fuel coal dust for combustion.
The invention provides a coal-saving desulfurization decoking catalyst for a boiler and an application method thereof, which have the beneficial effects that the coal-saving desulfurization, decoking, corrosion prevention and ash removal functions can be simultaneously realized in the operation process of the boiler through the multi-component synergistic effect, and the problems of single function, low desulfurization efficiency, poor decoking effect and insufficient adaptability in the prior art are effectively solved. The desulfurization catalyst is used for neutralizing sulfur oxides in flue gas, reducing low-temperature slagging, the temperature-sensitive expansion particles trigger the core to decompose and release gas through high temperature, dynamic expansion force is generated to peel hard coking, heat conduction is delayed through a coating layer, the particle structure is stabilized, the core decomposition rate is regulated, stability and high efficiency of expansion reaction are ensured, sulfur oxides and ash particles in the flue gas are adsorbed by porous carrier particles through high specific surface area and proper pore diameter, double salt and slagging adhesion are reduced, ash desorption effect is enhanced, heat transfer performance of a heating surface of a boiler is obviously improved, a high Wen Zhiliu loosening agent and the catalyst are cooperated to prevent secondary accumulation, heat transfer condition is improved, thermal efficiency of the boiler is improved, coal-saving agent reduces fuel consumption, a metal protective agent forms an anti-corrosion film on the heating surface, service life of the equipment is prolonged, and running economy of the boiler is obviously improved.
The summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the disclosure, nor is it intended to be used to limit the scope of the disclosure.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.
Fig. 1 is a schematic diagram of a temperature-sensitive expanded particle according to an embodiment of the present invention.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While embodiments of the present disclosure are illustrated in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment. The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like, may refer to different or the same object. Other explicit and implicit definitions are also possible below.
Examples:
A metal protective agent, namely copper carbonate, 6%;
oxidizing agent potassium permanganate, 10%;
a desulfurization catalyst, namely magnesium oxide, 12%;
The porous carrier particles are zeolite, 8 percent, the specific surface area is 100m 2/g, the pore diameter is 0.8nm, and the particle size range is 80-120 mu m;
Temperature sensitive expansion particles, namely calcium carbonate with aluminum oxide coated on the surface, wherein the coating thickness is 4 mu m, and the particle size range is 80-120 mu m (see figure 1);
high Wen Zhiliu, borax 12%;
Accelerator, ammonium sulfate, 8%;
catalyst sodium metasilicate, 15%;
Oxygenation agent, namely calcium oxide, 5%;
the coal-saving agent is sodium sulfate, 6%.
The components are weighed according to the proportion and then placed in mixing equipment, and are mixed at a high speed for 15 minutes at 25 ℃ to prepare the uniform granular coal-saving desulfurization decoking catalyst for the boiler.
The coal-saving desulfurizing decoking catalyst for boiler is added to the coal conveying belt in the amount of 0.02-0.06% of the fuel amount, and after being mixed with fuel coal, the catalyst is ground into powder through a coal mill, and the powder is fed into a hearth together with the fuel coal powder for combustion, so that the hard coking is dynamically expanded and stripped in a high temperature area, wet slag formation is reduced in a low temperature area, and the wet slag formation is evenly distributed on the surface of a heat pipe exchanger through flue gas flow, so that double salt and ash are further adsorbed, and adhesion is reduced. Meanwhile, the flue gas purification treatment is completed through the desulfurization reaction in the tail gas channel, the whole-process high-efficiency effect of the coal-saving desulfurization and Jiao Cuihua-agent for the boiler in the boiler system is ensured, the thermal efficiency of the boiler is improved by about 5%, and the functions of coal saving, desulfurization, decoking, corrosion prevention and ash removal are comprehensively realized.
The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvement of the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1.一种锅炉用节煤脱硫除焦催化剂，其特征在于，按重量百分比计，包括以下组分：金属保护剂6–10%，氧化剂10–15%，脱硫催化剂12–20%，多孔载体颗粒8–12%，温敏膨胀颗粒15–21%，高温滞留松动剂12–18%，促进剂6-11%，催化剂10–15%，增氧剂5-10%，节煤剂6-12%，所述金属保护剂为碳酸铜、硫酸钡、磷酸锌中的一种或多种，所述多孔载体颗粒为沸石、活性炭中的一种或多种，比表面积为50–150 m²/g，孔径范围为0.3–1.2 nm，颗粒粒径范围为50–150μm，所述温敏膨胀颗粒为表面包覆氧化铝的碳酸钙，包覆厚度为2–8μm，颗粒粒径范围为50–150μm。1. A coal-saving, desulfurization and decoking catalyst for a boiler, characterized in that it comprises the following components, by weight percentage: 6-10% metal protective agent, 10-15% oxidant, 12-20% desulfurization catalyst, 8-12% porous carrier particles, 15-21% temperature-sensitive expansion particles, 12-18% high-temperature retention loosening agent, 6-11% promoter, 10-15% catalyst, 5-10% oxygenator, and 6-12% coal-saving agent. The metal protective agent is one or more of copper carbonate, barium sulfate, and zinc phosphate. The porous carrier particles are one or more of zeolite and activated carbon, with a specific surface area of 50-150 m²/g, a pore size range of 0.3-1.2 nm, and a particle size range of 50-150 μm. The temperature-sensitive expansion particles are calcium carbonate coated with alumina, with a coating thickness of 2-8 μm and a particle size range of 50-150 μm. 2.根据权利要求1所述的锅炉用节煤脱硫除焦催化剂，其特征在于，所述氧化剂为高锰酸钾、硝酸钠中的一种或多种。2. The coal-saving, desulfurization and decoking catalyst for boilers according to claim 1, wherein the oxidant is one or more of potassium permanganate and sodium nitrate. 3.根据权利要求1所述的锅炉用节煤脱硫除焦催化剂，其特征在于，所述脱硫催化剂为氧化镁、碳酸钠中的一种或多种。3. The coal-saving desulfurization and decoking catalyst for boilers according to claim 1, characterized in that the desulfurization catalyst is one or more of magnesium oxide and sodium carbonate. 4.根据权利要求1所述的锅炉用节煤脱硫除焦催化剂，其特征在于，所述高温滞留松动剂为硼砂、碳酸钠、碳酸氢钠中的一种或多种。4. The coal-saving, desulfurization and decoking catalyst for boilers according to claim 1, wherein the high-temperature retention loosening agent is one or more of borax, sodium carbonate and sodium bicarbonate. 5.根据权利要求1所述的锅炉用节煤脱硫除焦催化剂，其特征在于，所述促进剂为硫酸铵、氯化钾中的一种或多种。The coal-saving, desulfurization and decoking catalyst for boilers according to claim 1 , wherein the promoter is one or more of ammonium sulfate and potassium chloride. 6.根据权利要求1所述的锅炉用节煤脱硫除焦催化剂，其特征在于，所述催化剂为偏硅酸钠、硅酸铝、二氧化硅中的一种或多种。The coal-saving, desulfurization and decoking catalyst for boilers according to claim 1 , wherein the catalyst is one or more of sodium metasilicate, aluminum silicate and silicon dioxide. 7.根据权利要求1所述的锅炉用节煤脱硫除焦催化剂，其特征在于，所述增氧剂为氧化钙、硝酸钾中的一种或多种。7. The coal-saving, desulfurization and decoking catalyst for boilers according to claim 1, wherein the oxygenant is one or more of calcium oxide and potassium nitrate. 8.根据权利要求1所述的锅炉用节煤脱硫除焦催化剂，其特征在于，所述节煤剂为硫酸钠、碳酸锂中的一种或多种。8. The coal-saving, desulfurization and decoking catalyst for boilers according to claim 1, wherein the coal-saving agent is one or more of sodium sulfate and lithium carbonate. 9.一种权利要求1-8中任一项所述的锅炉用节煤脱硫除焦催化剂的应用方法，其特征在于，包括：将所述锅炉用节煤脱硫除焦催化剂按燃料量的0.02–0.06%添加并分布在锅炉中。9. A method for using the coal-saving, desulfurization and decoking catalyst for boilers according to any one of claims 1 to 8, characterized in that it comprises: adding the coal-saving, desulfurization and decoking catalyst for boilers at a rate of 0.02-0.06% of the amount of fuel and distributing the catalyst in the boiler. 10.根据权利要求9所述的应用方法，其特征在于，所述将所述锅炉用节煤脱硫除焦催化剂按燃料量的0.02–0.06%添加并分布在锅炉中，包括：将所述锅炉用节煤脱硫除焦催化剂添加到输煤输送带并与燃料煤混合，通过磨煤机研磨成粉后随燃料煤粉一同送入炉膛进行燃烧。10. The application method according to claim 9 is characterized in that the boiler-use coal-saving desulfurization and decoking catalyst is added at 0.02-0.06% of the amount of fuel and distributed in the boiler, comprising: adding the boiler-use coal-saving desulfurization and decoking catalyst to a coal conveyor belt and mixing it with the fuel coal, grinding it into powder through a coal mill, and then feeding it into the furnace together with the fuel coal powder for combustion.
CN202510217693.8A 2025-02-26 2025-02-26 A coal-saving, desulfurizing and decoking catalyst for boilers and its application method Active CN120059817B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1629262A (en) * 2003-12-17 2005-06-22 王家财 Coal additive
CN102517120A (en) * 2011-12-27 2012-06-27 长春市奥地特科技有限公司 Fuel coal additive
CN102585968A (en) * 2012-03-27 2012-07-18 渭南瑞鑫环保科技有限责任公司 Nanometer composite coal-economizing agent for power plant boiler
CN115537245A (en) * 2022-10-27 2022-12-30 武汉大学 Combustion-supporting ball for coal combustion and manufacturing method and application thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1629262A (en) * 2003-12-17 2005-06-22 王家财 Coal additive
CN102517120A (en) * 2011-12-27 2012-06-27 长春市奥地特科技有限公司 Fuel coal additive
CN102585968A (en) * 2012-03-27 2012-07-18 渭南瑞鑫环保科技有限责任公司 Nanometer composite coal-economizing agent for power plant boiler
CN115537245A (en) * 2022-10-27 2022-12-30 武汉大学 Combustion-supporting ball for coal combustion and manufacturing method and application thereof

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