CN114806670A - Energy-saving and environment-friendly catalyst for coal combustion - Google Patents
Energy-saving and environment-friendly catalyst for coal combustion Download PDFInfo
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- CN114806670A CN114806670A CN202210456436.6A CN202210456436A CN114806670A CN 114806670 A CN114806670 A CN 114806670A CN 202210456436 A CN202210456436 A CN 202210456436A CN 114806670 A CN114806670 A CN 114806670A
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- 239000003245 coal Substances 0.000 title claims abstract description 67
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 66
- 239000003054 catalyst Substances 0.000 title claims abstract description 62
- 238000003756 stirring Methods 0.000 claims abstract description 64
- 238000003851 corona treatment Methods 0.000 claims abstract description 38
- 238000000227 grinding Methods 0.000 claims abstract description 29
- 238000002791 soaking Methods 0.000 claims abstract description 27
- 239000011812 mixed powder Substances 0.000 claims description 36
- 238000009210 therapy by ultrasound Methods 0.000 claims description 25
- 239000012141 concentrate Substances 0.000 claims description 17
- 239000011259 mixed solution Substances 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 239000002270 dispersing agent Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000004113 Sepiolite Substances 0.000 claims description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 11
- 238000002390 rotary evaporation Methods 0.000 claims description 11
- 229910052624 sepiolite Inorganic materials 0.000 claims description 11
- 235000019355 sepiolite Nutrition 0.000 claims description 11
- 239000011593 sulfur Substances 0.000 claims description 11
- 229910052717 sulfur Inorganic materials 0.000 claims description 11
- 239000004575 stone Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 239000012466 permeate Substances 0.000 claims description 8
- 150000003384 small molecules Chemical class 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims 4
- 230000000694 effects Effects 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 7
- 238000010304 firing Methods 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 230000036541 health Effects 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 6
- 239000010908 plant waste Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000003250 coal slurry Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
Classifications
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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
-
- 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
- C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
- C10L2230/04—Catalyst added to fuel stream to improve a reaction
-
- 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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/22—Impregnation or immersion of a fuel component or a fuel as a whole
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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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/24—Mixing, stirring of fuel components
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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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/28—Cutting, disintegrating, shredding or grinding
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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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/34—Applying ultrasonic energy
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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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/38—Applying an electric field or inclusion of electrodes in the apparatus
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Abstract
The invention discloses an energy-saving and environment-friendly catalyst for coal combustion, which relates to the technical field of coal combustion catalysts and comprises the following steps: (1) ultrasonic stirring treatment; (2) micronizing; (3) carrying out corona treatment; (4) soaking; (5) and (5) carrying out cryogenic grinding. This application has contrasted the effect of catalyst to four kinds of coals, and firing temperature is showing and is reducing, because the decline of firing temperature makes coal easily catch fire burning and burn out, is favorable to the improvement of coal utilization ratio to the effect of four kinds of coals all is showing comparatively, and the catalyst that also this application method prepared has fine universality. In addition, the solid is easier to store, the performance is more stable, and the catalyst also has the effects of improving the environment and protecting the human health.
Description
Technical Field
The invention belongs to the technical field of coal combustion catalysts, and particularly relates to an energy-saving and environment-friendly catalyst for coal combustion.
Background
The coal combustion catalyst has excellent combustion promoting effect and excellent desulfurization and denitrification effects, can reduce the pollution of coal combustion to the environment, and has important significance for the current energy conservation and emission reduction needs of China, so that the coal combustion catalyst draws extensive attention of a plurality of scientific and technological workers, performs a large amount of theoretical and experimental researches, and obtains good research effects. Coal combustion is a complex oxidation process that can be generally divided into volatilization, combustion (homogeneous combustion) and ignition of char particles (heterogeneous combustion). The combustion catalyst can reduce the apparent activation energy of coal combustion, reduce the ignition point of coal and accelerate the combustion rate of coal; can accelerate the fracture of various bond bonds in the coal pyrolysis process and improve the separation speed of coal volatile components. The coal combustion catalyst can reduce the emission of sulfur dioxide in the combustion process of coal; the coal combustion catalyst can reduce the emission of dust in the combustion process of coal, so that the combustion efficiency of the coal can be improved and the emission of pollutants in the combustion process of the coal can be reduced by adding the combustion catalyst in the combustion process of the coal. In recent years, studies on coal combustion catalysts and combustion improvers have been reported.
If the application number is: CN200810025850.1 discloses an energy-saving and environment-friendly coal combustion catalyst, and the invention discloses an energy-saving and environment-friendly coal combustion catalyst, which is prepared by dissolving the following raw materials in parts by mass in 100 parts of water and uniformly mixing: 20-30 parts of sulfuric acid plant waste residues, 20-35 parts of electroplating plant waste liquid, 25-30 parts of electrolytic copper plant waste liquid, 5-10 parts of nitrated rare earth, 3-5 parts of anionic surfactant and 2-5 parts of soluble calcium salt. When in use, the coal combustion catalyst only needs to be uniformly sprayed on the surface of coal and fully and uniformly mixed by a stirrer. The coal combustion catalyst is suitable for various pulverized coal injection boilers, water-coal slurry boilers, chain boilers, fluidized bed boilers, other forms of coal-fired boilers and civil bulk coal, is convenient to use and low in price, can improve the combustion strength and the hearth temperature of coal, improve the combustion performance of coal, reduce the exhaust emission, save coal by 10-30% and the like. Although the application improves the combustion performance of coal, the liquid catalyst has the problems of inconvenient storage and relatively poor stability, and in addition, the application does not have the effect of actively improving the environment although reducing the exhaust emission, so that the environment cannot be optimized while pollution is reduced.
Disclosure of Invention
The invention aims to provide an energy-saving and environment-friendly catalyst for coal combustion, aiming at the existing problems.
The invention is realized by the following technical scheme:
an energy-saving and environment-friendly catalyst for coal combustion is prepared by the following steps:
(1) ultrasonic stirring treatment:
adding micromolecular permeate water into a stirring tank, starting the stirring tank, sequentially adding a catalyst, a combustion improver, a sulfur-fixing agent and a dispersing agent under the condition of continuous stirring, stirring for 1-2 hours to obtain a mixed solution for later use, and performing ultrasonic treatment while stirring;
(2) superfine grinding:
putting sepiolite and loess stone together in a weight ratio of 1: 7-9 into an ultrafine grinder for ultrafine grinding treatment, and obtaining mixed powder for later use;
(3) corona treatment:
placing the mixed powder obtained in the step (2) in a corona discharge instrument for corona treatment, and taking out for later use after the corona treatment is finished;
(4) soaking:
immersing the mixed powder subjected to corona treatment in the step (3) into the mixed liquid obtained in the step (1), performing ultrasonic treatment while immersing, placing the mixed powder into a rotary evaporator for rotary evaporation treatment after the ultrasonic treatment is finished, and obtaining a concentrate for later use;
(5) cryogenic crushing:
and (4) placing the concentrate obtained in the step (4) into a cryogenic crusher to carry out cryogenic crushing treatment.
Further, in the step (1), the weight percentages of the catalyst, the combustion improver, the sulfur fixing agent, the dispersing agent and the small molecule permeable water are as follows: 2-6% of catalyst, 0.2-0.5% of combustion improver, 0.6-0.8% of sulfur fixing agent and 0.1-0.5% of dispersing agent.
Further, the rotating speed of the stirring tank is controlled to be 120-200 rpm when the stirring is continuously performed in the step (1).
Furthermore, the power of the ultrasonic wave in the step (1) is 100-120W, and the frequency is 40-50 kHz.
Further, the rotation speed of the pulverizer is controlled to be 20000 to 24000rpm during the ultrafine grinding treatment in the step (2), and the time of the grinding treatment is 30 to 40 min.
Further, the working voltage is controlled to be 10-14 kV during the corona treatment in the step (3), and the corona treatment time is 2-4 min.
Further, the soaking time in the step (4) is 8-12 h.
Furthermore, the power of the ultrasonic wave in the step (4) is 400-600W, and the frequency is 30-50 kHz.
Further, the temperature in the pulverizer is controlled to be-80 to-60 ℃ during the deep cooling crushing treatment in the step (5), the rotating speed of the pulverizer is 1000 to 3000rpm during the crushing treatment, and the time of the crushing treatment is 20 to 30 min.
Compared with the prior art, the invention has the following advantages:
1. this application has contrasted the effect of catalyst to four kinds of coals, and firing temperature is showing and is reducing, because the decline of firing temperature makes coal easily catch fire burning and burn out, is favorable to the improvement of coal utilization ratio to the effect of four kinds of coals all is showing comparatively, and the catalyst that also this application method prepared has fine universality.
2. This application has broken traditional catalyst's too form, sepiolite and loess stone carry out the super little mixed crushing this application, then carry out corona treatment to the mixed powder, the surface tension of mixed powder improves, simultaneously can also form a lot of slightly concave intensive holes on the surface, when soaking, sepiolite can absorb mixed liquid rapidly, when carrying out the rotary evaporation again, moisture is evaporated, and the active ingredient in the mixed liquid remains in the hole of mixed powder, smash through cryrogenic at last, obtain the catalyst that the homogeneity refines, because it is solid more easily to store, the performance is more stable, and this catalyst still has the improvement environment, the effect of protection health.
Detailed Description
For further explanation of the present invention, reference will now be made to the following specific examples.
Example 1:
an energy-saving and environment-friendly catalyst for coal combustion is prepared by the following steps:
(1) ultrasonic stirring treatment:
adding micromolecular permeate water into a stirring tank, starting the stirring tank, controlling the rotating speed of the stirring tank to be 120rpm, sequentially adding a catalyst, a combustion improver, a sulfur fixing agent and a dispersing agent under the condition of continuous stirring, stirring for 1h to obtain a mixed solution for later use, and performing ultrasonic treatment while stirring, wherein the power of ultrasonic waves is 100W, and the frequency is 40 kHz.
(2) Superfine grinding:
putting sepiolite and loess stone in a weight ratio of 1:7 into an ultrafine grinder for ultrafine grinding treatment, controlling the rotation speed of the grinder to 20000rpm, and grinding for 30min to obtain mixed powder for later use;
(3) corona treatment:
placing the mixed powder obtained in the step (2) in a corona discharge instrument for corona treatment, controlling the working voltage to be 10kV, and taking out for later use after corona treatment for 2 min;
(4) soaking:
soaking the mixed powder subjected to corona treatment in the step (3) in the mixed solution obtained in the step (1) for 8 hours, performing ultrasonic treatment while soaking, wherein the power of ultrasonic is 400W, the frequency is 30kHz, placing the mixed powder in a rotary evaporator for rotary evaporation treatment after the ultrasonic treatment is finished, and obtaining a concentrate for later use;
(5) cryogenic crushing:
and (4) placing the concentrate obtained in the step (4) into a cryogenic crusher to carry out cryogenic crushing treatment, wherein the temperature in the crusher is controlled to be-80 ℃, the rotating speed of the crusher during crushing treatment is 1000rpm, and the time of crushing treatment is 20 min.
Example 2:
an energy-saving and environment-friendly catalyst for coal combustion is prepared by the following steps:
(1) ultrasonic stirring treatment:
adding micromolecular permeate water into a stirring tank, starting the stirring tank, controlling the rotating speed of the stirring tank to be 160rpm, sequentially adding a catalyst, a combustion improver, a sulfur fixing agent and a dispersing agent under the condition of continuous stirring, treating for 1.5 hours to obtain a mixed solution for later use, and performing ultrasonic treatment while stirring, wherein the power of ultrasonic waves is 110W, and the frequency is 45 kHz.
(2) Superfine grinding:
putting sepiolite and loess stone in a weight ratio of 1:8 into an ultrafine grinder for carrying out ultrafine grinding treatment, controlling the rotation speed of the grinder to be 22000rpm, and grinding for 35min to obtain mixed powder for later use;
(3) corona treatment:
placing the mixed powder obtained in the step (2) in a corona discharge instrument for corona treatment, controlling the working voltage to be 12kV, and taking out for later use after corona treatment for 3 min;
(4) soaking:
soaking the mixed powder subjected to corona treatment in the step (3) in the mixed solution obtained in the step (1) for 10 hours, performing ultrasonic treatment while soaking, wherein the power of ultrasonic is 500W, the frequency is 40kHz, placing the mixed powder in a rotary evaporator for rotary evaporation treatment after the ultrasonic treatment is finished, and obtaining a concentrate for later use;
(5) cryogenic crushing:
and (4) placing the concentrate obtained in the step (4) into a cryogenic crusher to carry out cryogenic crushing treatment, wherein the temperature in the crusher is controlled to be-70 ℃, the rotating speed of the crusher during crushing treatment is 2000rpm, and the time of crushing treatment is 25 min.
Example 3:
an energy-saving and environment-friendly catalyst for coal combustion is prepared by the following steps:
(1) ultrasonic stirring treatment:
adding micromolecular permeate water into a stirring tank, starting the stirring tank, controlling the rotating speed of the stirring tank to be 200rpm, sequentially adding a catalyst, a combustion improver, a sulfur fixing agent and a dispersing agent under the condition of continuous stirring, stirring for 2 hours to obtain a mixed solution for later use, and performing ultrasonic treatment while stirring, wherein the power of ultrasonic waves is 120W, and the frequency is 50 kHz.
(2) Superfine grinding:
putting sepiolite and loess stone in a weight ratio of 1:9 into an ultrafine grinder for ultrafine grinding treatment, controlling the rotation speed of the grinder to 24000rpm, and grinding for 40min to obtain mixed powder for later use;
(3) corona treatment:
placing the mixed powder obtained in the step (2) in a corona discharge instrument for corona treatment, controlling the working voltage to be 14kV, and taking out for later use after corona treatment for 4 min;
(4) soaking:
soaking the mixed powder subjected to corona treatment in the step (3) in the mixed solution obtained in the step (1) for 12 hours, performing ultrasonic treatment while soaking, wherein the power of ultrasonic is 600W, the frequency is 50kHz, placing the mixed powder in a rotary evaporator for rotary evaporation treatment after the ultrasonic treatment is finished, and obtaining a concentrate for later use;
(5) cryogenic crushing:
and (4) placing the concentrate obtained in the step (4) into a cryogenic crusher to carry out cryogenic crushing treatment, wherein the temperature in the crusher is controlled to be-60 ℃, the rotating speed of the crusher during crushing treatment is 3000rpm, and the time of crushing treatment is 30 min.
Comparative example 1:
an energy-saving and environment-friendly catalyst for coal combustion is prepared by the following steps:
(1) stirring treatment:
adding micromolecular permeating water into a stirring tank, starting the stirring tank, controlling the rotating speed of the stirring tank to be 160rpm, sequentially adding a catalyst, a combustion improver, a sulfur fixing agent and a dispersing agent under the condition of continuous stirring, and stirring for 1.5 hours to obtain a mixed solution for later use.
(2) Superfine grinding:
putting sepiolite and loess stone in a weight ratio of 1:8 into an ultrafine grinder for ultrafine grinding treatment, controlling the rotation speed of the grinder to be 22000rpm, and grinding for 35min to obtain mixed powder for later use;
(3) corona treatment:
placing the mixed powder obtained in the step (2) in a corona discharge instrument for corona treatment, controlling the working voltage to be 12kV, and taking out for later use after corona treatment for 3 min;
(4) soaking:
soaking the mixed powder subjected to corona treatment in the step (3) in the mixed solution obtained in the step (1) for 10 hours, performing ultrasonic treatment while soaking, wherein the power of ultrasonic is 500W, the frequency is 40kHz, placing the mixed powder in a rotary evaporator for rotary evaporation treatment after the ultrasonic treatment is finished, and obtaining a concentrate for later use;
(5) cryogenic crushing:
and (4) placing the concentrate obtained in the step (4) into a cryogenic crusher to carry out cryogenic crushing treatment, wherein the temperature in the crusher is controlled to be-70 ℃, the rotating speed of the crusher during crushing treatment is 2000rpm, and the time of crushing treatment is 25 min.
Comparative example 2:
an energy-saving and environment-friendly catalyst for coal combustion is prepared by the following steps:
(1) ultrasonic stirring treatment:
adding micromolecular permeate water into a stirring tank, starting the stirring tank, controlling the rotating speed of the stirring tank to be 160rpm, sequentially adding a catalyst, a combustion improver, a sulfur fixing agent and a dispersing agent under the condition of continuous stirring, stirring for 1.5 hours to obtain a mixed solution for later use, and performing ultrasonic treatment while stirring, wherein the power of ultrasonic waves is 110W, and the frequency is 45 kHz.
(2) Superfine grinding:
putting sepiolite and loess stone in a weight ratio of 1:8 into an ultrafine grinder for ultrafine grinding treatment, controlling the rotation speed of the grinder to be 22000rpm, and grinding for 35min to obtain mixed powder for later use;
(3) soaking:
soaking the mixed powder obtained in the step (2) in the mixed liquid obtained in the step (1) for 10 hours, performing ultrasonic treatment while soaking, wherein the power of ultrasonic waves is 500W, the frequency is 40kHz, placing the powder in a rotary evaporator for rotary evaporation treatment after the ultrasonic treatment is finished, and obtaining a concentrate for later use;
(4) cryogenic crushing:
and (4) placing the concentrate obtained in the step (3) into a cryogenic crusher to carry out cryogenic crushing treatment, wherein the temperature in the crusher is controlled to be-70 ℃, the rotating speed of the crusher during crushing treatment is 2000rpm, and the time of crushing treatment is 25 min.
Comparative example 3:
an energy-saving and environment-friendly catalyst for coal combustion is prepared by the following steps:
(1) ultrasonic stirring treatment:
adding micromolecular permeate water into a stirring tank, starting the stirring tank, controlling the rotating speed of the stirring tank to be 160rpm, sequentially adding a catalyst, a combustion improver, a sulfur fixing agent and a dispersing agent under the condition of continuous stirring, stirring for 1.5 hours to obtain a mixed solution for later use, and performing ultrasonic treatment while stirring, wherein the power of ultrasonic waves is 110W, and the frequency is 45 kHz.
(2) Superfine grinding:
putting sepiolite and loess stone in a weight ratio of 1:8 into an ultrafine grinder for ultrafine grinding treatment, controlling the rotation speed of the grinder to be 22000rpm, and grinding for 35min to obtain mixed powder for later use;
(3) corona treatment:
placing the mixed powder obtained in the step (2) in a corona discharge instrument for corona treatment, controlling the working voltage to be 12kV, and taking out for later use after corona treatment for 3 min;
(4) soaking:
soaking the mixed powder subjected to corona treatment in the step (3) into the mixed liquid obtained in the step (1) for 10 hours, placing the mixed powder into a rotary evaporator for rotary evaporation treatment after the soaking is finished, and obtaining a concentrate for later use after the rotary evaporation treatment is finished;
(5) cryogenic crushing:
and (4) placing the concentrate obtained in the step (4) into a cryogenic crusher to carry out cryogenic crushing treatment, wherein the temperature in the crusher is controlled to be-70 ℃, the rotating speed of the crusher during crushing treatment is 2000rpm, and the time of crushing treatment is 25 min.
Comparative example 4:
an energy-saving and environment-friendly catalyst for coal combustion is prepared by the following steps:
(1) ultrasonic stirring treatment:
adding micromolecular permeate water into a stirring tank, starting the stirring tank, controlling the rotating speed of the stirring tank to be 160rpm, sequentially adding a catalyst, a combustion improver, a sulfur fixing agent and a dispersing agent under the condition of continuous stirring, stirring for 1.5 hours to obtain a mixed solution for later use, and performing ultrasonic treatment while stirring, wherein the power of ultrasonic waves is 110W, and the frequency is 45 kHz.
(2) Superfine grinding:
putting sepiolite and loess stone in a weight ratio of 1:8 into an ultrafine grinder for ultrafine grinding treatment, controlling the rotation speed of the grinder to be 22000rpm, and grinding for 35min to obtain mixed powder for later use;
(3) corona treatment:
placing the mixed powder obtained in the step (2) in a corona discharge instrument for corona treatment, controlling the working voltage to be 12kV, and taking out for later use after corona treatment for 3 min;
(4) soaking:
and (3) soaking the mixed powder subjected to corona treatment in the step (3) in the mixed solution obtained in the step (1) for 10 hours, performing ultrasonic treatment while soaking, wherein the power of ultrasonic waves is 500W, the frequency is 40kHz, placing the mixture in a rotary evaporator for rotary evaporation treatment after the ultrasonic treatment is finished, and drying the concentrate after the ultrasonic treatment is finished.
Control group:
the application numbers are: CN200810025850.1 discloses an energy-saving and environment-friendly coal combustion catalyst.
In order to compare the technical effects of the present application, catalysts were prepared by the methods of example 2, comparative examples 1 to 4, and the control group, respectively, and then the ignition temperature of coal was measured by a thermogravimetry method (the addition amount of the catalyst was 1%).
The specific experimental comparative data are shown in the following table 1:
TABLE 1
Note: the ignition temperature of each raw coal is as follows: the coal blend is 480 ℃, the Jinzhou coal is 520 ℃, the Taixi coal is 560 ℃, and the Yongan coal is 624 ℃.
As can be seen from the table 1 above, the application compares the effect of the catalyst on four kinds of coal, the ignition temperature is obviously reduced, and the coal is easy to ignite, burn and burn out due to the reduction of the ignition temperature, so that the improvement of the coal utilization rate is facilitated, and the effect of the four kinds of coal is obvious, namely the catalyst prepared by the application method has good universality.
Claims (9)
1. The energy-saving and environment-friendly catalyst for coal combustion is characterized by comprising the following steps:
(1) ultrasonic stirring treatment:
adding micromolecular permeate water into a stirring tank, starting the stirring tank, sequentially adding a catalyst, a combustion improver, a sulfur fixing agent and a dispersing agent under the condition of continuous stirring, stirring for 1-2 hours to obtain a mixed solution for later use, and performing ultrasonic treatment while stirring;
(2) superfine grinding:
putting sepiolite and loess stone together in a weight ratio of 1: 7-9 into an ultrafine grinder for ultrafine grinding treatment, and obtaining mixed powder for later use;
(3) corona treatment:
placing the mixed powder obtained in the step (2) in a corona discharge instrument for corona treatment, and taking out for later use after the corona treatment is finished;
(4) soaking:
immersing the mixed powder subjected to corona treatment in the step (3) into the mixed liquid obtained in the step (1), performing ultrasonic treatment while immersing, placing the mixed powder into a rotary evaporator for rotary evaporation treatment after the ultrasonic treatment is finished, and obtaining a concentrate for later use;
(5) cryogenic crushing:
and (4) placing the concentrate obtained in the step (4) into a cryogenic crusher to carry out cryogenic crushing treatment.
2. The coal combustion energy-saving environment-friendly catalyst as claimed in claim 1, wherein the weight percentages of the catalyst, the combustion improver, the sulfur-fixing agent, the dispersant and the small molecule permeable water in the step (1) are as follows: 2-6% of catalyst, 0.2-0.5% of combustion improver, 0.6-0.8% of sulfur fixing agent and 0.1-0.5% of dispersing agent.
3. The coal combustion energy-saving and environment-friendly catalyst according to claim 1, characterized in that the rotation speed of the stirring tank is controlled to be 120-200 rpm during the continuous stirring in the step (1).
4. The coal combustion energy-saving environment-friendly catalyst according to claim 1, characterized in that the power of the ultrasonic wave in the step (1) is 100-120W, and the frequency is 40-50 kHz.
5. The energy-saving and environment-friendly catalyst for coal combustion as claimed in claim 1, wherein the rotation speed of the pulverizer is controlled to be 20000 to 24000rpm during the ultrafine grinding treatment in the step (2), and the time of the pulverizing treatment is 30 to 40 min.
6. The coal combustion energy-saving environment-friendly catalyst according to claim 1, characterized in that the working voltage during the corona treatment in the step (3) is controlled to be 10-14 kV, and the time of the corona treatment is 2-4 min.
7. The coal combustion energy-saving environment-friendly catalyst according to claim 1, characterized in that the soaking time in the step (4) is 8-12 h.
8. The coal combustion energy-saving environment-friendly catalyst according to claim 1, characterized in that the power of the ultrasonic wave in the step (4) is 400-600W, and the frequency is 30-50 kHz.
9. The coal combustion energy-saving environment-friendly catalyst according to claim 1, characterized in that the temperature in the pulverizer is controlled to be-80 to-60 ℃ during the cryogenic pulverization treatment in the step (5), the rotation speed of the pulverizer is 1000 to 3000rpm during the pulverization treatment, and the pulverization treatment time is 20 to 30 min.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105969442A (en) * | 2016-03-22 | 2016-09-28 | 安徽徽明建设集团有限公司 | Biomass briquette containing oil sludge and manufacturing method thereof |
| CN112852517A (en) * | 2019-11-12 | 2021-05-28 | 张义 | Efficient and environment-friendly coal-saving combustion improver |
| CN113337483A (en) * | 2021-06-02 | 2021-09-03 | 河南净然环保科技有限公司 | Biological catalase preparation, preparation method thereof and application of biological catalase preparation in removing formaldehyde and peculiar smell |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105969442A (en) * | 2016-03-22 | 2016-09-28 | 安徽徽明建设集团有限公司 | Biomass briquette containing oil sludge and manufacturing method thereof |
| CN112852517A (en) * | 2019-11-12 | 2021-05-28 | 张义 | Efficient and environment-friendly coal-saving combustion improver |
| CN113337483A (en) * | 2021-06-02 | 2021-09-03 | 河南净然环保科技有限公司 | Biological catalase preparation, preparation method thereof and application of biological catalase preparation in removing formaldehyde and peculiar smell |
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