CN110699150A - Environment-friendly decoking agent and preparation method thereof - Google Patents
Environment-friendly decoking agent and preparation method thereof Download PDFInfo
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- CN110699150A CN110699150A CN201911032395.2A CN201911032395A CN110699150A CN 110699150 A CN110699150 A CN 110699150A CN 201911032395 A CN201911032395 A CN 201911032395A CN 110699150 A CN110699150 A CN 110699150A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
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Abstract
The invention discloses an environment-friendly decoking agent and a preparation method thereof, wherein the decoking agent comprises the following components, by mass, a denitration auxiliary agent for assisting NO generated by reduction in the reaction process, aluminum hydroxide for slowing the cohesive force of coking positions, a surfactant for improving the surface activity of the decoking agent components to improve the combustion rate, a catalyst for supporting combustion, wherein the content of the denitration auxiliary agent is 20% ~ 50%, the content of the aluminum hydroxide is 10% ~ 20%, the content of the surfactant is 3% ~ 6%, the content of the catalyst is 3% ~ 6%, and the balance is water.
Description
Technical Field
The invention relates to the technical field of fuel cleaning, in particular to an environment-friendly decoking agent and a preparation method thereof.
Background
The coal has high ash content and low ash melting point, and is one of the reasons for easy coking of the boiler. Whether coking occurs also depends on the mineral nature of the coal. Normally, the slag cools to a solid before leaving the center of combustion of the boiler and hitting the heated surface, which causes only wear and does not lead to coking. If the molten slag is still in a molten state when colliding with the heated surface, the molten slag adheres to the pipe wall to form coke. When the load is high and high-sulfur coal is used, the temperature of a hearth rises to form a large amount of molten fluid which flows along the heating surface of the boiler, at the moment, the heating surface of the boiler is coked seriously and forms compact coke blocks with strong cohesiveness, the coke blocks are gradually connected into sheets and fall down after forming huge coke blocks, a large amount of water vapor is generated instantly to destroy the water seal of a slag conveyor, a large amount of cold air leaks into the bottom of the furnace at the same time, the pulverized coal flame ignition condition of a burner area (particularly a burner area at the lower row) is seriously worsened, and the negative pressure of the hearth can generate severe fluctuation (overrun) to cause the fire extinguishing of the boiler in serious cases.
In the prior art, the coking and the dust deposition of a boiler are removed mainly by adding a decoking agent into fire coal. Most of the existing coal-fired decoking agents are powder type and also have partial liquid type. The main active ingredients of the powder decoking agent are chloride, metal oxide, kaolin, chromium salt, rare earth oxide and the like, the existing powder decoking agent has certain effect on preventing coking, but the powder decoking agent has the defects that firstly, a large amount of the powder decoking agent is needed to be added to achieve the ideal effect, the relative adding amount is large, and the decoking cost is undoubtedly increased; secondly, the powder added into the fire coal is generally manually operated, so that the uniformity of the added agent is difficult to ensure, even if mechanical addition is adopted, advanced and complex equipment needs to be matched, the cost is high, the adding is labor-consuming and troublesome, the requirement on adding equipment is high, and the cost is additionally increased; thirdly, the boiler corrosion is aggravated by adding chloride, and the chromium salt is large in toxicity and not safe enough. The liquid coke removing agent has less dosage and low cost, and the spraying and adding are more feasible compared with the powder adding. The existing liquid decoking agent is comprehensively analyzed, mostly nitrate is used as a basic active ingredient, the 'micro-explosion' effect and the combustion-supporting characteristic of the liquid decoking agent are utilized to promote the loosening and falling of the coke slag, a large amount of NOx can be generated by the decomposition of the nitrate at high temperature, the emission of pollutants can be increased by NOx generated by the decomposition of the nitrate, the aim of decoking is achieved by a boiler, the emission of NOx is increased, and the difficulty of denitration and the cost of denitration are increased.
In view of the above, there is a need for a new environmentally friendly decoking agent that can reduce NOx emissions.
Disclosure of Invention
The invention mainly aims to provide an environment-friendly decoking agent and a preparation method thereof, and aims to solve the problem of NO emission in the decoking process.
In order to achieve the purpose, the invention provides an environment-friendly decoking agent, which comprises the following components in percentage by mass:
the denitration auxiliary agent is used for assisting NO generated by reduction in the reaction process, the aluminum hydroxide and/or the aluminum oxide for slowing the binding power of a coking part, the surfactant for improving the surface activity of the decoking agent component to improve the combustion rate, and the catalyst for supporting combustion;
wherein the content of the denitration auxiliary agent is 20% ~ 50%;
the content of the aluminum hydroxide and/or the aluminum oxide is 10 percent ~ 20 percent;
the content of the surfactant is 3 percent ~ 6 percent;
the content of the catalyst is 3 percent ~ 6 percent;
the balance of water;
the denitration auxiliary agent comprises acetate, nitric acid, copper nitrate and ammonium nitrate.
Preferably, the denitration aid includes:
5% of calcium acetate ~ 25%, 5% of nitric acid ~ 10%, 5% of copper nitrate ~ 10%, and 5% of ammonium nitrate ~ 15%.
Preferably, the surfactant comprises 3.2% ~ 4.3.3% by mass of sodium dodecylbenzene sulfonate.
Preferably, the catalyst comprises 1.2% ~ 3.5.5% titania, 1.2% ~ 3.5.5% barium molybdate, 1.2% ~ 3.5.5% cobalt sulfate, and 1.2% ~ 3.5.5% vanadium pentoxide.
Preferably, the components of the decoking agent and the mass percentages of the components are as follows:
10% of calcium acetate, 5% of nitric acid, 5% of copper nitrate, 5% of ammonium nitrate, 10% of aluminum hydroxide, 3.2% of sodium dodecyl benzene sulfonate, 1.2% of titanium dioxide, 1.2% of barium molybdate, 1.2% of cobalt sulfate, 1.2% of vanadium pentoxide and the balance of water.
Preferably, the components of the decoking agent and the mass percentages of the components are as follows:
17% of calcium acetate, 5.5% of nitric acid, 5.2% of copper nitrate, 6.2% of ammonium nitrate, 12% of aluminum hydroxide, 3.8% of sodium dodecyl benzene sulfonate, 1.5% of titanium dioxide, 1.5% of barium molybdate, 1.5% of cobalt sulfate, 1.5% of vanadium pentoxide and the balance of water.
In addition, in order to achieve the purpose, the invention also provides a preparation method of the environment-friendly decoking agent, which comprises the following steps:
taking an aluminum oxide solution as an aluminum source and ammonia as a precipitator, and obtaining dry aluminum hydroxide through precipitation reaction, aging, refrigeration, filtration, washing and drying;
adding 20% of ~ 50% of denitration auxiliary agent, 10% of ~ 20% of aluminum hydroxide, 3% of ~ 6% of surfactant and 3% of ~ 6% of catalyst into water in parts by weight, and stirring and mixing to obtain an environment-friendly decoking agent;
wherein the denitration auxiliary agent comprises acetate, nitric acid, copper nitrate and ammonium nitrate.
Preferably, the decoking agent comprises the following components in percentage by mass:
10% of calcium acetate, 5% of nitric acid, 5% of copper nitrate, 5% of ammonium nitrate, 10% of aluminum hydroxide, 3.2% of sodium dodecyl benzene sulfonate, 1.2% of titanium dioxide, 1.2% of barium molybdate, 1.2% of cobalt sulfate, 1.2% of vanadium pentoxide and the balance of water.
Preferably, 17% of calcium acetate, 5.5% of nitrate, 5.2% of copper nitrate, 6.2% of ammonium nitrate, 12% of aluminum hydroxide, 3.8% of sodium dodecylbenzene sulfonate, 1.5% of titanium dioxide, 1.5% of barium molybdate, 1.5% of cobalt sulfate and 1.5% of vanadium pentoxide, and the balance being water.
The environment-friendly decoking agent comprises, by mass, a denitration auxiliary agent for assisting NO generated by reduction in the reaction process, aluminum hydroxide for slowing the binding power of a coking part, a surfactant for improving the surface activity of the decoking agent component to improve the combustion rate, and a catalyst for supporting combustion, wherein the denitration auxiliary agent comprises 20% of ~ 50%, the aluminum hydroxide comprises 10% of ~ 20%, the surfactant comprises 3% of ~ 6%, the catalyst comprises 3% of ~ 6%, and the balance of water.
Detailed Description
The technical problems solved, the technical solutions adopted and the technical effects achieved by the embodiments of the present invention are clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few, and not all, of the embodiments of the present application. All other equivalent or obviously modified embodiments obtained by the person skilled in the art on the basis of the embodiments presented in the present application fall within the scope of protection of the invention without inventive step. The embodiments of the invention can be embodied in many different ways as defined and covered by the claims.
It should be noted that in the following description, numerous specific details are set forth in order to provide an understanding. It may be evident, however, that the subject invention may be practiced without these specific details.
It should be noted that, unless explicitly defined or conflicting, the embodiments and technical features in the present invention may be combined with each other to form a technical solution.
The invention mainly aims to provide an environment-friendly decoking agent, aiming at solving the problem of NO emission in the decoking process.
The components of the decoking agent in the embodiment of the invention and the mass percentages of the components are as follows:
the denitration auxiliary agent is used for assisting NO generated by reduction in the reaction process, the aluminum hydroxide is used for slowing the binding power of a coking part, the surfactant is used for improving the surface activity of the decoking agent component so as to improve the combustion rate, and the catalyst is used for supporting combustion;
wherein the content of the denitration auxiliary agent is 20% ~ 50%;
the content of the aluminum hydroxide is 10 percent ~ 20 percent;
the content of the surfactant is 3 percent ~ 6 percent;
the content of the catalyst is 3 percent ~ 6 percent;
the balance of water;
the denitration auxiliary agent comprises acetate, nitric acid, copper nitrate and ammonium nitrate.
The calcium acetate mainly has the effects of improving the ash melting point and realizing synergistic denitration, and after the calcium acetate is added into a hearth, the calcium acetate is quickly decomposed at high temperature to generate nano CaO and Hydrocarbon (CHi), the CaO has a high melting point and can react with a low melting point compound in ash slag to generate a high melting point compound, so that the ash slag is not easy to coke, and the generated nano CaO can be used as a catalytic carrier for denitration reaction to promote the denitration of the CHi; CHi produced by decomposition has strong reducibility and can react with NO to produce HCN, and the HCN further reduces NO to N2. The whole reaction process can be simply described as follows: calcium acetate is decomposed at high temperature to generate CHi and CaO, and hydroxyl is reacted by the following reaction processes:
the NO is reduced, and the generated CaO can be used as a catalytic carrier of the reduction reaction to promote the reduction reaction.
Nitrate such as copper nitrate, ammonium nitrate and the like plays a role of a strong oxidant and a combustion improver, and copper brought by the nitrate can reduce the ignition point of the formed carbon compound and play a role of catalyzing the combustion of the formed carbon compound, so that the utilization rate of the fire coal is improved; nitrate can be decomposed at high temperature in the hearth and collides and rubs with carbon powder, sulfur and other combustible substances in the coke layer under the action of airflow, and a micro-explosion effect is generated on the coke surface, so that the coke layer is loosened and disintegrated to have the effect similar to mechanical coking; meanwhile, the oxygen of pyrolysis and combustible materials in the coke slag are fully combusted, so that the cohesiveness of a coke layer is reduced, a large coke block is not easy to form, the large coke block falls off, the boiler is accidentally extinguished or a slag conveyor is blocked and chain broken to cause unplanned shutdown, and meanwhile, the content of the combustible materials in the slag can be reduced.
The cerium nitrate mainly plays a role in supporting combustion and catalyzing combustion, and the specific cerium nitrate is decomposed to generate the rare earth cerium oxide, so that the ignition point of fixed carbon can be effectively reduced, a combustion-supporting effect is achieved, the coal powder can be promoted to be fully combusted, and unburned carbon in a coke layer can be fully combusted to enable the coke layer to become loose.
Ammonium nitrate is used as a denitrifying agent, has a denitrifying effect and can decompose ammonia gas at high temperature to release ammonia gas, the ammonia gas reacts with NOx through amino functional groups of ammonium salt under the action of catalysts of titanium dioxide, barium molybdate, cobalt sulfate and vanadium pentoxide, NO with low activity is oxidized to generate NO2 with high activity, and nitrogen oxide reacts with ammonia gas to generate nitrogen gas and water, so that the denitrifying effect is achieved.
The titanium dioxide, barium molybdate, cobalt sulfate and vanadium pentoxide are used as catalysts, and the addition of the catalysts can increase the activity of the fire coal, strengthen the combustion of the fire coal, and play a role in strong combustion supporting, energy increasing and denitration. After the catalyst is added, the crystal lattice of the carbon is distorted, the carbon-metal complex is easy to separate from the crystal lattice, and the activity of the carbon is improved.
Sodium dodecyl benzene sulfonate is a surfactant, and when the sodium dodecyl benzene sulfonate is mixed with a liquid carrier and sprayed on fire coal, the sodium dodecyl benzene sulfonate can be quickly dispersed among coal particles, so that the fire coal particles are mutually adsorbed, new combustion points are increased, and the combustion area of the fire coal is enlarged.
The aluminum oxide is an inhibitor of calcium sulfate, the embodiment of the invention improves the reduction of NO by adding calcium acetate, but in the reaction process, calcium ions may be combined with sulfate ions remained in a boiler at high temperature to form calcium sulfate, and further may be decomposed into SO2 at high temperature, and the aluminum oxide is added for inhibiting the generation of the calcium sulfate.
The scheme of the invention is described in detail by the following examples:
example 1:
100kg of decoking agent is prepared, and the components and the formula are as follows:
10kg of calcium acetate, 5kg of nitric acid, 5kg of copper nitrate, 5kg of ammonium nitrate, 10kg of aluminum hydroxide, 3.2kg of sodium dodecyl benzene sulfonate, 1.2kg of titanium dioxide, 1.2kg of barium molybdate, 1.2kg of cobalt sulfate, 1.2kg of vanadium pentoxide and the balance of water.
The preparation process comprises the following steps:
a stirring barrel is arranged, and a vertical liquid stirrer is arranged at the top of the barrel; adding water into a stirring barrel according to the preparation proportion, adding cerium nitrate, copper nitrate and ammonium nitrate, stirring until all components are completely dissolved, adding aluminum hydroxide, titanium dioxide, barium molybdate, cobalt sulfate and 1 vanadium pentoxide, finally adding calcium acetate, and stirring until all components are completely dissolved to prepare the liquid boiler decoking agent. The decoking agent is poured into the pressure spraying tank, compressed air is introduced into the pressure spraying tank, the spray gun is connected with the pressure spraying tank, the spray gun is inserted into a fire observation opening or a coking opening of a hearth, and the spray gun is opened to utilize the compressed air to atomize, spray and feed the decoking agent into a coal-fired boiler.
In this embodiment, a 100MW coal powder furnace is taken as an example, the decoking agent is added three times per day, 25kg is added each time, the adding duration time of each time is controlled to be 30min, and the adding amount of the decoking agent is 0.5 per mill of the coal burning amount. If the adding times of the boiler which does not use the decoking agent in the first week are doubled, the adding times can be further increased or correspondingly reduced according to the coking condition of the hearth. The decoking agent can effectively remove coking, improve the thermal efficiency of the boiler, reduce the exhaust gas temperature, and simultaneously has the denitration effect and can effectively inhibit the initial discharge of NOx.
The decoking agent is subjected to a fixed-dose test on a 75t/h pulverized coal furnace, the test period is 30 days, the decoking agent is not added in the first 15 days, the decoking agent is added in the last 15 days, and the decoking agent is added for 30min at a time of 25kg three times every day. The results of the 30-day continuous test show that: the decoking agent can effectively inhibit coking, and after the decoking agent is matched with soot blowing of a hearth, about 90% of coking in a furnace can be visually observed to be removed through a fire observation opening, so that the decoking effect is obvious; the decoking agent promotes the sufficient combustion of coal powder, improves the heat transfer efficiency of a hearth, reduces the exhaust gas temperature, can reflect the more sufficient combustion in a furnace by reducing the exhaust gas temperature, and has high heat efficiency.
Example 2:
100kg of decoking agent is prepared, and the components and the formula are as follows:
17kg of calcium acetate, 5.5kg of nitric acid, 5.2kg of copper nitrate, 6.2kg of ammonium nitrate, 12kg of aluminum hydroxide, 3.8kg of sodium dodecyl benzene sulfonate, 1.5kg of titanium dioxide, 1.5kg of barium molybdate, 1.5kg of cobalt sulfate, 1.5kg of vanadium pentoxide and the balance of water.
The preparation method, the application method, the addition amount and the addition frequency are as shown in example 1.
Example 3:
100kg of decoking agent is prepared, and the components and the formula are as follows:
15kg of calcium acetate, 5.5kg of nitric acid, 5.2kg of copper nitrate, 6.2kg of ammonium nitrate, 20kg of aluminum hydroxide, 3.8kg of sodium dodecyl benzene sulfonate, 1.5kg of titanium dioxide, 1.5kg of barium molybdate, 1.5kg of cobalt sulfate, 1.5kg of vanadium pentoxide and the balance of water.
The preparation method, the application method, the addition amount and the addition frequency are as shown in example 1.
Example 4:
100kg of decoking agent is prepared, and the components and the formula are as follows:
20kg of calcium acetate, 5.5kg of nitric acid, 5.2kg of copper nitrate, 6.2kg of ammonium nitrate, 15kg of aluminum hydroxide, 3.8kg of sodium dodecyl benzene sulfonate, 1.5kg of titanium dioxide, 1.5kg of barium molybdate, 1.5kg of cobalt sulfate, 1.5kg of vanadium pentoxide and the balance of water.
The preparation method, the application method, the addition amount and the addition frequency are as shown in example 1.
Example 5:
100kg of decoking agent is prepared, and the components and the formula are as follows:
25kg of calcium acetate, 5.5kg of nitric acid, 5.2kg of copper nitrate, 6.2kg of ammonium nitrate, 20kg of aluminum hydroxide, 3.8kg of sodium dodecyl benzene sulfonate, 1.5kg of titanium dioxide, 1.5kg of barium molybdate, 1.5kg of cobalt sulfate, 1.5kg of vanadium pentoxide and the balance of water.
The preparation method, the application method, the addition amount and the addition frequency are as shown in example 1.
Example 6:
100kg of decoking agent is prepared, and the components and the formula are as follows:
17kg of calcium acetate, 5.5kg of nitric acid, 5.2kg of copper nitrate, 6.2kg of ammonium nitrate, 12kg of aluminum hydroxide, 6.5kg of alumina, 3.8kg of sodium dodecyl benzene sulfonate, 1.5% of titanium dioxide, 1.5% of barium molybdate, 1.5% of cobalt sulfate, 1.5% of vanadium pentoxide and the balance of water.
The preparation method, the application method, the addition amount and the addition frequency are as shown in example 1.
Comparative example 1
100kg of decoking agent is prepared, and the components and the formula are as follows:
5kg of nitric acid, 5kg of copper nitrate, 5kg of ammonium nitrate, 10kg of aluminum hydroxide, 3.2kg of sodium dodecyl benzene sulfonate, 1.2kg of titanium dioxide, 1.2kg of barium molybdate, 1.2kg of cobalt sulfate, 1.2kg of vanadium pentoxide and the balance of water.
Comparative example 2
100kg of decoking agent is prepared, and the components and the formula are as follows:
15kg of calcium acetate, 5.5kg of nitric acid, 5.2kg of copper nitrate, 6.2kg of ammonium nitrate, 3.8kg of sodium dodecyl benzene sulfonate, 1.5kg of titanium dioxide, 1.5kg of barium molybdate, 1.5kg of cobalt sulfate, 1.5kg of vanadium pentoxide and the balance of water.
Comparative example 3
100kg of decoking agent is prepared, and the components and the formula are as follows:
5kg of nitric acid, 5kg of copper nitrate, 5kg of ammonium nitrate, 3.2kg of sodium dodecyl benzene sulfonate, 1.2kg of titanium dioxide, 1.2kg of barium molybdate, 1.2kg of cobalt sulfate, 1.2kg of vanadium pentoxide and the balance of water.
And (3) analyzing an experimental result:
| serial number | Decoking rate | NO emission/PPM | Exhaust gas temperature |
| Example 1 | 91% | 85 | 165 |
| Example 2 | 93.4% | 65 | 163 |
| Example 3 | 91.8% | 81 | 164 |
| Example 4 | 90% | 82 | 167 |
| Example 5 | 86.2% | 78 | 163 |
| Example 6 | 93% | 70 | 165 |
| Comparative example 1 | 65% | 95 | 172 |
| Comparative example 2 | 68% | 88 | 175 |
| Comparative example 3 | 50% | 98 | 170 |
From the experimental results, the decoking effect of the decoking agent of the embodiment of the invention is better than that of the comparative example 1 ~ 3, and particularly, the decoking effect of the embodiment 2 is the best in the embodiment of the invention.
In addition, the embodiment of the invention also adopts materials which can support combustion, such as a surfactant, a catalyst and the like, so that the exhaust gas temperature is reduced.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. The environment-friendly decoking agent is characterized by comprising the following components in percentage by mass:
the denitration auxiliary agent is used for assisting NO generated by reduction in the reaction process, the aluminum hydroxide and/or the aluminum oxide for slowing the binding power of a coking part, the surfactant for improving the surface activity of the decoking agent component to improve the combustion rate, and the catalyst for supporting combustion;
wherein the content of the denitration auxiliary agent is 20% ~ 50%;
the content of the aluminum hydroxide and/or the aluminum oxide is 10 percent ~ 20 percent;
the content of the surfactant is 3 percent ~ 6 percent;
the content of the catalyst is 3 percent ~ 6 percent;
the balance of water;
the denitration auxiliary agent comprises acetate, nitric acid, copper nitrate and ammonium nitrate.
2. The environment-friendly decoking agent according to claim 1, wherein the denitration aid comprises:
5% of calcium acetate ~ 25%, 5% of nitric acid ~ 10%, 5% of copper nitrate ~ 10%, and 5% of ammonium nitrate ~ 15%.
3. The environment-friendly decoking agent as defined in claim 1, wherein the surfactant comprises 3.2% ~ 4.3.3% by mass of sodium dodecylbenzene sulfonate.
4. The environment-friendly decoking agent as defined in claim 1, wherein the catalyst comprises 1.2% ~ 3.5.5% titanium dioxide, 1.2% ~ 3.5.5% barium molybdate, 1.2% ~ 3.5.5% cobalt sulfate and 1.2% ~ 3.5.5% vanadium pentoxide.
5. The environment-friendly decoking agent as defined in claim 1, wherein the components of the decoking agent and the mass percentages of the components are as follows:
10% of calcium acetate, 5% of nitric acid, 5% of copper nitrate, 5% of ammonium nitrate, 10% of aluminum hydroxide, 3.2% of sodium dodecyl benzene sulfonate, 1.2% of titanium dioxide, 1.2% of barium molybdate, 1.2% of cobalt sulfate, 1.2% of vanadium pentoxide and the balance of water.
6. The environment-friendly decoking agent as defined in claim 1, wherein the components of the decoking agent and the mass percentages of the components are as follows:
17% of calcium acetate, 5.5% of nitric acid, 5.2% of copper nitrate, 6.2% of ammonium nitrate, 12% of aluminum hydroxide, 3.8% of sodium dodecyl benzene sulfonate, 1.5% of titanium dioxide, 1.5% of barium molybdate, 1.5% of cobalt sulfate, 1.5% of vanadium pentoxide and the balance of water.
7. The preparation method of the environment-friendly decoking agent is characterized by comprising the following steps:
taking an aluminum oxide solution as an aluminum source and ammonia as a precipitator, and obtaining dry aluminum hydroxide through precipitation reaction, aging, refrigeration, filtration, washing and drying;
adding 20% of ~ 50% of denitration auxiliary agent, 10% of ~ 20% of aluminum hydroxide, 3% of ~ 6% of surfactant and 3% of ~ 6% of catalyst into water in parts by weight, and stirring and mixing to obtain an environment-friendly decoking agent;
wherein the denitration auxiliary agent comprises acetate, nitric acid, copper nitrate and ammonium nitrate.
8. The preparation method of the environment-friendly decoking agent as claimed in claim 7, wherein the decoking agent comprises the following components in percentage by mass:
10% of calcium acetate, 5% of nitric acid, 5% of copper nitrate, 5% of ammonium nitrate, 10% of aluminum hydroxide, 3.2% of sodium dodecyl benzene sulfonate, 1.2% of titanium dioxide, 1.2% of barium molybdate, 1.2% of cobalt sulfate, 1.2% of vanadium pentoxide and the balance of water.
9. The preparation method of the environment-friendly decoking agent as claimed in claim 7, wherein the decoking agent comprises the following components in percentage by mass:
17% of calcium acetate, 5.5% of nitric acid, 5.2% of copper nitrate, 6.2% of ammonium nitrate, 12% of aluminum hydroxide, 3.8% of sodium dodecyl benzene sulfonate, 1.5% of titanium dioxide, 1.5% of barium molybdate, 1.5% of cobalt sulfate, 1.5% of vanadium pentoxide and the balance of water.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113088361A (en) * | 2021-04-01 | 2021-07-09 | 廊坊宏悦化工有限责任公司 | Three-in-one efficient environment-friendly energy-saving agent for boiler |
| CN114317062A (en) * | 2022-01-26 | 2022-04-12 | 华润电力（渤海新区）有限公司 | Coke inhibiting and removing agent and method for removing coke between screens by using same |
| CN114907899A (en) * | 2022-06-10 | 2022-08-16 | 南方电网电力科技股份有限公司 | Composite decoking agent for household garbage incineration boiler |
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| CN113088361A (en) * | 2021-04-01 | 2021-07-09 | 廊坊宏悦化工有限责任公司 | Three-in-one efficient environment-friendly energy-saving agent for boiler |
| CN113088361B (en) * | 2021-04-01 | 2022-08-16 | 廊坊宏悦化工有限责任公司 | Energy-saving agent for boiler |
| CN114317062A (en) * | 2022-01-26 | 2022-04-12 | 华润电力（渤海新区）有限公司 | Coke inhibiting and removing agent and method for removing coke between screens by using same |
| CN114907899A (en) * | 2022-06-10 | 2022-08-16 | 南方电网电力科技股份有限公司 | Composite decoking agent for household garbage incineration boiler |
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