CN113088362A - Environment-friendly energy-saving boiler decoking and slag removing agent - Google Patents
Environment-friendly energy-saving boiler decoking and slag removing agent Download PDFInfo
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- CN113088362A CN113088362A CN202110358164.1A CN202110358164A CN113088362A CN 113088362 A CN113088362 A CN 113088362A CN 202110358164 A CN202110358164 A CN 202110358164A CN 113088362 A CN113088362 A CN 113088362A
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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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
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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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- 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
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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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/18—Use of additives to fuels or fires for particular purposes use of detergents or dispersants for purposes not provided for in groups C10L10/02 - C10L10/16
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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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention relates to the technical field of decoking slag removal agents, in particular to an environment-friendly and energy-saving boiler decoking slag removal agent which is composed of the following substances in parts by weight: the decoking slag remover prepared by the invention promotes the generation of products at the initial stage of boiler combustion and improves the boiler combustion, is different from the potassium-sodium based slag remover which is once popular in the domestic market, and because the base type is changed, ash slag is converted into a glassy state from the glassy state, the crystallization is promoted to be rapidly completed, the ash melting point can be improved by about 100 ℃, so that a coke body becomes crisp, the effect on coal with high ash content and low volatile content is better, and after the product is added, large slag at the bottom of a furnace has the characteristic of looseness and porosity, and the slag crusher can more easily work normally.
Description
Technical Field
The invention relates to the technical field of decoking and slag removing agents, in particular to a decoking and slag removing agent for an environment-friendly and energy-saving boiler.
Background
Coking is a common problem in the operation of coal-fired boilers, the problems of reduced thermal efficiency, damage to boiler equipment and the like can be caused by boiler coking, and even furnace flameout or boiler tube explosion can be caused in serious cases. In view of the harm of boiler coking, it is very important to research effective coal-fired boiler decoking additives.
At present, in order to reduce the contamination and coking of high-sodium coal, people generally adopt co-combustion to relieve the problems, but due to the limitation of the co-combustion ratio, the fuel cost is greatly increased. Therefore, the anti-coking technology special for the high-sodium coal is developed, the high-sodium coal can be safely and effectively utilized, and the anti-coking technology has important significance for the national energy strategy.
Therefore, an environment-friendly and energy-saving boiler decoking slag remover is proposed to solve the problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an environment-friendly and energy-saving boiler decoking and slag removing agent.
An environment-friendly energy-saving boiler decoking slag remover comprises the following substances in parts by weight: 60-80 parts of magnesium compound, 9-16 parts of oxidant, 0.3-1.5 parts of catalyst, 2-6 parts of swelling agent, 3-5 parts of corrosion inhibitor, 8-15 parts of copper compound, 40-60 parts of nitrate compound, 4-12 parts of zinc stearate and 7-9 parts of boron nitride.
Preferably, the magnesium compound is a mixture of one or more of magnesium hydroxide, magnesium oxide and magnesium chloride.
Preferably, the oxidizing agent is potassium permanganate.
Preferably, the catalyst is one or more of titanium dioxide, nickel chloride, nickel nitrate or nickel oxide.
Preferably, the swelling agent consists of bentonite, ground calcium carbonate, silicon micropowder and diatomite in a mass ratio of 6:5:3: 2.
Preferably, the corrosion inhibitor is one of borate and phosphate.
Preferably, the copper compound is a mixture of one or more of copper sulfate, copper chloride and copper oxide.
Preferably, the nitrate compound is a mixture of one or more of sodium nitrate, potassium nitrate, copper nitrate and zinc nitrate.
Preferably, the preparation process comprises the following steps:
s1, weighing a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound, a nitrate compound, zinc stearate and boron nitride;
s2, adding solid materials of a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound, a nitrate compound and boron nitride into deionized water, stirring for 40-60min, and uniformly stirring to obtain a mixture A, wherein the mass ratio of the deionized water to the solid materials is 4-6: 1;
s3, adding zinc stearate into the mixture A, and continuously stirring for 20-30min to obtain a mixture B;
s4, drying the mixture B, crushing into powder, and sieving to obtain the decoking slag-cleaning agent.
Preferably, in the S4, the mesh number of the screen is 80-120 meshes.
The invention has the beneficial effects that:
1. the decoking slag-cleaning agent prepared by the invention promotes the generation of products at the initial stage of boiler combustion, improves the boiler combustion, is different from potassium-sodium-based slag-cleaning agents which are popular in domestic markets, and can change ash slag from glass state to crystalline state due to the change of the base form, promote the crystallization to be rapidly completed, improve the ash melting point by about 100 ℃, make coke body become crisp, and have better effect on coal types with high ash content and low volatile content.
2. The decoking slag remover prepared by the invention contains zinc stearate, and both zinc stearate and boron nitride have certain lubricity, so that materials are not easy to bond before coal is combusted, and the zinc stearate can be attached to the inner wall of a boiler and is combusted in the combustion process of the coal, so that formed coke blocks are further combusted, the formed coke blocks are promoted to be disintegrated, and decoking is promoted.
3. The decoking slag remover prepared by the invention contains boron nitride in the decoking slag remover, the boron nitride has certain lubricity and has good stability at high temperature, the boron nitride can ensure that coal and a product are not easy to bond with each other in the initial combustion stage of the coal, when the boron nitride permeates into the product, the boron nitride is hard and smooth in texture, a plurality of through holes can be formed in large slag at the bottom of the furnace during sliding, and finally the hardness of the large slag at the bottom of the furnace is low, so that the slag remover is convenient to carry out slag removal.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
In embodiment 1, an environment-friendly and energy-saving boiler decoking slag remover comprises the following substances in parts by weight: 60 parts of magnesium compound, 9 parts of oxidant, 0.3 part of catalyst, 2 parts of swelling agent, 3 parts of corrosion inhibitor, 8 parts of copper compound, 40 parts of nitrate compound, 4 parts of zinc stearate and 7 parts of boron nitride.
Further, the magnesium compound is one or more of magnesium hydroxide, magnesium oxide and magnesium chloride.
Further, the oxidant is potassium permanganate.
Further, the catalyst is one or a mixture of titanium dioxide, nickel chloride, nickel nitrate or nickel oxide.
Further, the swelling agent is composed of bentonite, ground calcium carbonate, silicon micropowder and diatomite, and the mass ratio of the bentonite, the ground calcium carbonate, the silicon micropowder and the diatomite is 6:5:3: 2.
Further, the corrosion inhibitor is one of borate and phosphate.
Further, the copper compound is one or more of copper sulfate, copper chloride and copper oxide.
Further, the nitrate compound is one or a mixture of sodium nitrate, potassium nitrate, copper nitrate and zinc nitrate.
Further, the preparation process comprises the following steps:
s1, weighing a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound, a nitrate compound, zinc stearate and boron nitride;
s2, adding solid materials of a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound, a nitrate compound and boron nitride into deionized water, stirring for 40min, and uniformly stirring to obtain a mixture A, wherein the mass ratio of the deionized water to the solid materials is 4: 1;
s3, adding zinc stearate into the mixture A, and continuing stirring for 20min to obtain a mixture B;
s4, drying the mixture B, crushing into powder, and sieving to obtain the decoking slag-cleaning agent. In the S4, the mesh number of the screen is 80 meshes.
In embodiment 2, an environment-friendly and energy-saving boiler decoking slag remover comprises the following substances in parts by weight: 80 parts of magnesium compound, 16 parts of oxidant, 1.5 parts of catalyst, 6 parts of swelling agent, 5 parts of corrosion inhibitor, 15 parts of copper compound, 60 parts of nitrate compound, 12 parts of zinc stearate and 9 parts of boron nitride.
Further, the magnesium compound is one or more of magnesium hydroxide, magnesium oxide and magnesium chloride.
Further, the oxidant is potassium permanganate.
Further, the catalyst is one or a mixture of titanium dioxide, nickel chloride, nickel nitrate or nickel oxide.
Further, the swelling agent is composed of bentonite, ground calcium carbonate, silicon micropowder and diatomite, and the mass ratio of the bentonite, the ground calcium carbonate, the silicon micropowder and the diatomite is 6:5:3: 2.
Further, the corrosion inhibitor is one of borate and phosphate.
Further, the copper compound is one or more of copper sulfate, copper chloride and copper oxide.
Further, the nitrate compound is one or a mixture of sodium nitrate, potassium nitrate, copper nitrate and zinc nitrate.
Further, the preparation process comprises the following steps:
s1, weighing a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound, a nitrate compound, zinc stearate and boron nitride;
s2, adding solid materials of a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound, a nitrate compound and boron nitride into deionized water, stirring for 60min, and uniformly stirring to obtain a mixture A, wherein the mass ratio of the deionized water to the solid materials is 6: 1;
s3, adding zinc stearate into the mixture A, and continuing stirring for 30min to obtain a mixture B;
s4, drying the mixture B, crushing into powder, and sieving to obtain the decoking slag-cleaning agent.
Further, in S4, the mesh number of the mesh was 120 mesh.
In embodiment 3, an environment-friendly and energy-saving boiler decoking slag remover comprises the following components in parts by weight: 70 parts of magnesium compound, 12 parts of oxidant, 0.9 part of catalyst, 4 parts of swelling agent, 4 parts of corrosion inhibitor, 12 parts of copper compound, 50 parts of nitrate compound, 8 parts of zinc stearate and 8 parts of boron nitride.
Further, the magnesium compound is one or more of magnesium hydroxide, magnesium oxide and magnesium chloride.
Further, the oxidant is potassium permanganate.
Further, the catalyst is one or a mixture of titanium dioxide, nickel chloride, nickel nitrate or nickel oxide.
Further, the swelling agent is composed of bentonite, ground calcium carbonate, silicon micropowder and diatomite, and the mass ratio of the bentonite, the ground calcium carbonate, the silicon micropowder and the diatomite is 6:5:3: 2.
Further, the corrosion inhibitor is one of borate and phosphate.
Further, the copper compound is one or more of copper sulfate, copper chloride and copper oxide.
Further, the nitrate compound is one or a mixture of sodium nitrate, potassium nitrate, copper nitrate and zinc nitrate.
Further, the preparation process comprises the following steps:
s1, weighing a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound, a nitrate compound, zinc stearate and boron nitride;
s2, adding solid materials of a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound, a nitrate compound and boron nitride into deionized water, stirring for 50min, and uniformly stirring to obtain a mixture A, wherein the mass ratio of the deionized water to the solid materials is 5: 1;
s3, adding zinc stearate into the mixture A, and continuously stirring for 25min to obtain a mixture B;
s4, drying the mixture B, crushing into powder, and sieving to obtain the decoking slag-cleaning agent.
Further, in S4, the mesh number of the mesh was 120 mesh.
In comparative example 1, the environment-friendly and energy-saving boiler decoking slag remover consists of the following substances in parts by weight: 70 parts of magnesium compound, 12 parts of oxidant, 0.9 part of catalyst, 4 parts of swelling agent, 4 parts of corrosion inhibitor, 12 parts of copper compound, 50 parts of nitrate compound and 8 parts of boron nitride.
Further, the magnesium compound is one or more of magnesium hydroxide, magnesium oxide and magnesium chloride.
Further, the oxidant is potassium permanganate.
Further, the catalyst is one or a mixture of titanium dioxide, nickel chloride, nickel nitrate or nickel oxide.
Further, the swelling agent is composed of bentonite, ground calcium carbonate, silicon micropowder and diatomite, and the mass ratio of the bentonite, the ground calcium carbonate, the silicon micropowder and the diatomite is 6:5:3: 2.
Further, the corrosion inhibitor is one of borate and phosphate.
Further, the copper compound is one or more of copper sulfate, copper chloride and copper oxide.
Further, the nitrate compound is one or a mixture of sodium nitrate, potassium nitrate, copper nitrate and zinc nitrate.
Further, the preparation process comprises the following steps:
s1, weighing a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound, a nitrate compound and boron nitride;
s2, adding solid materials of a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound, a nitrate compound and boron nitride into deionized water, stirring for 50min, and uniformly stirring to obtain a mixture A, wherein the mass ratio of the deionized water to the solid materials is 5: 1;
s3, continuing stirring for 25min to obtain a mixture B;
s4, drying the mixture B, crushing into powder, and sieving to obtain the decoking slag-cleaning agent.
Further, in S4, the mesh number of the mesh was 120 mesh.
In comparative example 2, the environment-friendly and energy-saving boiler decoking slag remover consists of the following substances in parts by weight: 70 parts of magnesium compound, 12 parts of oxidant, 0.9 part of catalyst, 4 parts of swelling agent, 4 parts of corrosion inhibitor, 12 parts of copper compound, 50 parts of nitrate compound and 8 parts of zinc stearate.
Further, the magnesium compound is one or more of magnesium hydroxide, magnesium oxide and magnesium chloride.
Further, the oxidant is potassium permanganate.
Further, the catalyst is one or a mixture of titanium dioxide, nickel chloride, nickel nitrate or nickel oxide.
Further, the swelling agent is composed of bentonite, ground calcium carbonate, silicon micropowder and diatomite, and the mass ratio of the bentonite, the ground calcium carbonate, the silicon micropowder and the diatomite is 6:5:3: 2.
Further, the corrosion inhibitor is one of borate and phosphate.
Further, the copper compound is one or more of copper sulfate, copper chloride and copper oxide.
Further, the nitrate compound is one or a mixture of sodium nitrate, potassium nitrate, copper nitrate and zinc nitrate.
Further, the preparation process comprises the following steps:
s1, weighing a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound, a nitrate compound and zinc stearate;
s2, adding solid materials of a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound and a nitrate compound into deionized water, stirring for 50min, and uniformly stirring to obtain a mixture A, wherein the mass ratio of the deionized water to the solid materials is 5: 1;
s3, adding zinc stearate into the mixture A, and continuously stirring for 25min to obtain a mixture B;
s4, drying the mixture B, crushing into powder, and sieving to obtain the decoking slag-cleaning agent.
Further, in S4, the mesh number of the mesh was 120 mesh.
In comparative example 3, the environment-friendly and energy-saving boiler decoking slag remover consists of the following substances in parts by weight: 70 parts of magnesium compound, 12 parts of oxidant, 0.9 part of catalyst, 4 parts of swelling agent, 4 parts of corrosion inhibitor, 12 parts of copper compound and 50 parts of nitrate compound.
Further, the magnesium compound is one or more of magnesium hydroxide, magnesium oxide and magnesium chloride.
Further, the oxidant is potassium permanganate.
Further, the catalyst is one or a mixture of titanium dioxide, nickel chloride, nickel nitrate or nickel oxide.
Further, the swelling agent is composed of bentonite, ground calcium carbonate, silicon micropowder and diatomite, and the mass ratio of the bentonite, the ground calcium carbonate, the silicon micropowder and the diatomite is 6:5:3: 2.
Further, the corrosion inhibitor is one of borate and phosphate.
Further, the copper compound is one or more of copper sulfate, copper chloride and copper oxide.
Further, the nitrate compound is one or a mixture of sodium nitrate, potassium nitrate, copper nitrate and zinc nitrate.
Further, the preparation process comprises the following steps:
s1, weighing a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound and a nitrate compound;
s2, adding solid materials of a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound and a nitrate compound into deionized water, stirring for 50min, and uniformly stirring to obtain a mixture A, wherein the mass ratio of the deionized water to the solid materials is 5: 1;
s3, continuing stirring for 25min to obtain a mixture B;
s4, drying the mixture B, crushing into powder, and sieving to obtain the decoking slag-cleaning agent.
Further, in S4, the mesh number of the mesh was 120 mesh.
In comparative example 4, the environment-friendly and energy-saving boiler decoking slag remover consists of the following substances in parts by weight: 70 parts of magnesium compound, 12 parts of oxidant, 4 parts of swelling agent, 4 parts of corrosion inhibitor, 12 parts of copper compound, 50 parts of nitrate compound, 8 parts of zinc stearate and 8 parts of boron nitride.
Further, the magnesium compound is one or more of magnesium hydroxide, magnesium oxide and magnesium chloride.
Further, the oxidant is potassium permanganate.
Further, the swelling agent is composed of bentonite, ground calcium carbonate, silicon micropowder and diatomite, and the mass ratio of the bentonite, the ground calcium carbonate, the silicon micropowder and the diatomite is 6:5:3: 2.
Further, the corrosion inhibitor is one of borate and phosphate.
Further, the copper compound is one or more of copper sulfate, copper chloride and copper oxide.
Further, the nitrate compound is one or a mixture of sodium nitrate, potassium nitrate, copper nitrate and zinc nitrate.
Further, the preparation process comprises the following steps:
s1, weighing a magnesium compound, an oxidant, a swelling agent, a corrosion inhibitor, a copper compound, a nitrate compound, zinc stearate and boron nitride;
s2, adding solid materials of a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound, a nitrate compound and boron nitride into deionized water, stirring for 50min, and uniformly stirring to obtain a mixture A, wherein the mass ratio of the deionized water to the solid materials is 5: 1;
s3, adding zinc stearate into the mixture A, and continuously stirring for 25min to obtain a mixture B;
s4, drying the mixture B, crushing into powder, and sieving to obtain the decoking slag-cleaning agent.
Further, in S4, the mesh number of the mesh was 120 mesh.
In comparative example 5, the environment-friendly and energy-saving boiler decoking slag remover consists of the following substances in parts by weight: 70 parts of magnesium compound, 12 parts of oxidant, 0.9 part of catalyst, 4 parts of corrosion inhibitor, 12 parts of copper compound, 50 parts of nitrate compound, 8 parts of zinc stearate and 8 parts of boron nitride.
Further, the magnesium compound is one or more of magnesium hydroxide, magnesium oxide and magnesium chloride.
Further, the oxidant is potassium permanganate.
Further, the catalyst is one or a mixture of titanium dioxide, nickel chloride, nickel nitrate or nickel oxide.
Further, the corrosion inhibitor is one of borate and phosphate.
Further, the copper compound is one or more of copper sulfate, copper chloride and copper oxide.
Further, the nitrate compound is one or a mixture of sodium nitrate, potassium nitrate, copper nitrate and zinc nitrate.
Further, the preparation process comprises the following steps:
s1, weighing a magnesium compound, an oxidant, a catalyst, a corrosion inhibitor, a copper compound, a nitrate compound, zinc stearate and boron nitride;
s2, adding solid materials of a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound, a nitrate compound and boron nitride into deionized water, stirring for 50min, and uniformly stirring to obtain a mixture A, wherein the mass ratio of the deionized water to the solid materials is 5: 1;
s3, adding zinc stearate into the mixture A, and continuously stirring for 25min to obtain a mixture B;
s4, drying the mixture B, crushing into powder, and sieving to obtain the decoking slag-cleaning agent.
Further, in S4, the mesh number of the mesh was 120 mesh.
The test method comprises the following steps: the decoking and slag removing agents of the embodiments 1 to 3 and the comparative examples 1 to 5 are applied to high-sodium coal for decoking, the decoking and slag removing agents are respectively added into a coal dust air duct through compressed air, the addition amount of the decoking and slag removing agents is 0.5 per mill of the weight of the high-sodium coal, the decoking and slag removing agents and the coal dust are uniformly mixed in the conveying process, the mixture is conveyed into a furnace for combustion, a sampling pipe is used for sampling after the working condition is stabilized, sampling and comparison are carried out in a test boiler under the same working condition, the dust deposition in unit area of the decoking and slag removing agents of the embodiments 1 to 3 and the comparative examples 1 to 5 is respectively compared, and the Mohs hardness of slag at the bottom of the furnace is detected:
TABLE 1
As can be seen from Table 1, in examples 1-3, after 30min of operation, the amount of reduction of ash deposition per unit area reaches more than 39.6, the Mohs hardness of the large slag on the bottom of the furnace is lower than 3.5, the large slag on the bottom of the furnace is easy to crush and convenient to clean, in comparative example 1, after 30min of operation, the amount of reduction of ash deposition per unit area is not as that in examples 1-3, which shows that the amount of ash deposition is increased without adding zinc stearate, in comparative example 2, boron nitride is not added, the Mohs hardness of the large slag on the bottom of the furnace is obviously higher than that in examples 1-3, which shows that boron nitride has a significant effect on reducing the Mohs hardness of the large slag on the bottom of the furnace, in comparative example 3, zinc stearate and boron nitride are not added, the amount of reduction of ash deposition per unit area and the Mohs hardness of the large slag on the bottom of the furnace are not ideal, in comparative example 4, the amount of ash deposition is obviously higher, the effect of the catalyst is obviously better than that of zinc stearate, but the effect of zinc stearate on clearing deposited ash is still obvious, in the comparative example 5, no swelling agent is added, the Mohs hardness of the bottom slag is between the comparative example 2 and the example 2, and the swelling agent can reduce the Mohs hardness of the bottom slag to a certain extent, but the effect is not as good as that of boron nitride.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The environment-friendly energy-saving boiler decoking slag remover is characterized by comprising the following substances in parts by weight: 60-80 parts of magnesium compound, 9-16 parts of oxidant, 0.3-1.5 parts of catalyst, 2-6 parts of swelling agent, 3-5 parts of corrosion inhibitor, 8-15 parts of copper compound, 40-60 parts of nitrate compound, 4-12 parts of zinc stearate and 7-9 parts of boron nitride.
2. The environment-friendly energy-saving boiler decoking slag remover according to claim 1, wherein the magnesium compound is a mixture of one or more of magnesium hydroxide, magnesium oxide and magnesium chloride.
3. The environment-friendly energy-saving boiler decoking slag remover according to claim 1, wherein the oxidant is potassium permanganate.
4. The environment-friendly energy-saving boiler decoking slag remover according to claim 1, wherein the catalyst is one or a mixture of titanium dioxide, nickel chloride, nickel nitrate or nickel oxide.
5. The environment-friendly energy-saving boiler decoking slag remover according to claim 1, wherein the swelling agent is composed of bentonite, ground calcium carbonate, silica micropowder and diatomite in a mass ratio of 6:5:3: 2.
6. The environment-friendly energy-saving boiler decoking and slag removing agent as claimed in claim 1, wherein the corrosion inhibitor is one of borate and phosphate.
7. The environment-friendly energy-saving boiler decoking slag remover according to claim 1, wherein the copper compound is a mixture of one or more of copper sulfate, copper chloride and copper oxide.
8. The environment-friendly energy-saving boiler decoking slag remover according to claim 1, wherein the nitrate compound is one or a mixture of sodium nitrate, potassium nitrate, copper nitrate and zinc nitrate.
9. The environment-friendly energy-saving boiler decoking slag remover according to any one of claims 1 to 8, wherein the preparation process comprises the following steps:
s1, weighing a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound, a nitrate compound, zinc stearate and boron nitride;
s2, adding solid materials of a magnesium compound, an oxidant, a catalyst, a swelling agent, a corrosion inhibitor, a copper compound, a nitrate compound and boron nitride into deionized water, stirring for 40-60min, and uniformly stirring to obtain a mixture A, wherein the mass ratio of the deionized water to the solid materials is 4-6: 1;
s3, adding zinc stearate into the mixture A, and continuously stirring for 20-30min to obtain a mixture B;
s4, drying the mixture B, crushing into powder, and sieving to obtain the decoking slag-cleaning agent.
10. The environment-friendly energy-saving boiler decoking slag remover according to claim 9, wherein in S4, the mesh number of the screen is 80-120 meshes.
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