CN114453113A - Preparation system and preparation method of alternative fuel for cement kiln - Google Patents
Preparation system and preparation method of alternative fuel for cement kiln Download PDFInfo
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- CN114453113A CN114453113A CN202011245652.3A CN202011245652A CN114453113A CN 114453113 A CN114453113 A CN 114453113A CN 202011245652 A CN202011245652 A CN 202011245652A CN 114453113 A CN114453113 A CN 114453113A
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- 239000004568 cement Substances 0.000 title claims abstract description 51
- 239000000446 fuel Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 101
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 51
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 51
- 238000000227 grinding Methods 0.000 claims abstract description 47
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 44
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000011343 solid material Substances 0.000 claims abstract description 17
- 239000007787 solid Substances 0.000 claims description 18
- 238000000926 separation method Methods 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 238000003860 storage Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims 1
- 238000003801 milling Methods 0.000 claims 1
- 239000011541 reaction mixture Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 22
- 239000002893 slag Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 8
- 239000002699 waste material Substances 0.000 description 8
- 239000002910 solid waste Substances 0.000 description 7
- 239000000428 dust Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000003570 air Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 3
- 101150054854 POU1F1 gene Proteins 0.000 description 3
- 238000001354 calcination Methods 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
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- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 150000004678 hydrides Chemical class 0.000 description 2
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 2
- 238000003746 solid phase reaction Methods 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
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- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
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- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- -1 river Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/30—Passing gas through crushing or disintegrating zone the applied gas acting to effect material separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
- B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Electrolytic Production Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a preparation system and a preparation method for preparing cement kiln alternative fuel by using electrolytic aluminum cathode carbon blocks. The preparation system comprises: the material receiving and crushing system at least comprises a crushing device, wherein the crushing device receives and crushes solid materials containing the electrolytic aluminum cathode carbon blocks into crushed materials; and the grinding system at least comprises a grinding device communicated with the crushing device, and the grinding device receives the crushed material and grinds the crushed material into powdery material, wherein the powdery material is used as alternative fuel of the cement kiln. The invention can utilize the cathode carbon block of the electrolytic aluminum to prepare the cement kiln alternative fuel by relying on the cement kiln system, realizes the effective utilization of resources, and can carry out harmless treatment on the cathode carbon block of the electrolytic aluminum.
Description
Technical Field
The invention relates to a preparation system and a preparation method of alternative fuel for a cement kiln, in particular to a preparation system and a preparation method for preparing the alternative fuel for the cement kiln by using cathode carbon blocks of electrolytic aluminum.
Background
In the electrolytic aluminum production process, need change or overhaul the electrolysis trough every 3 ~ 6 years, the change of electrolysis trough or the maintenance can produce a large amount of solid waste, and these solid waste no matter stack or landfill all can bring the pollution for ambient air, river, soil etc. again, cause the wasting of resources. According to statistics, in the production process of electrolytic aluminum, every 1 ten thousand tons of aluminum are produced, about 100 tons of waste cathode carbon blocks are generated in solid waste materials generated by replacement or maintenance of an electrolytic cell, the quantity of the waste cathode carbon blocks generated by the production of electrolytic aluminum in China per year is more than 25 ten thousand tons, and the current stock is more than 200 ten thousand tons. The stacking requirement of the cathode carbon blocks in China is very strict, and rain and water seepage are not allowed so as to avoid polluting the environment. Since 1996, the U.S. environmental protection agency forbids open-air stockpiling and soil burying of waste cathodes, and requires that an electrolytic aluminum plant must perform harmless treatment, so that the waste cathodes discharged by the U.S. electrolytic aluminum plant are basically treated in a harmless way.
The fluoride salt in the cathode carbon block accounts for 30 percent (wherein the soluble fluoride accounts for 25 percent, and the soluble hydride accounts for 0.02 percent), the cathode carbon block generates hydrolysis reaction when meeting water to generate toxic and harmful gases such as hydrogen fluoride, hydrogen cyanide, ammonia gas and the like to pollute the ambient air, and the liquid is a toxic solution of strong-alkaline fluorine-containing compounds, hydride and the like, so the waste solid cathode carbon block of the electrolytic cell belongs to dangerous solid waste, and is also clearly classified in the 'national dangerous waste record' 2016 edition.
The carbon in the main component of the cathode carbon block accounts for about 50 percent, has quite high calorific value and can be used as alternative fuel.
The treatment technology of the waste cathode carbon block generated in the electrolytic aluminum production process is difficult, the existing treatment technology, no matter a fire method or a wet method, has high treatment cost, low purity of recovered electrolyte, large content of metal elements in the carbon block and the like, the existing fire method process decomposes fluoride and cyanide at high temperature and the wet leaching process generates toxic and harmful gas, and partial recovery process is not effectively recovered and treated, thereby causing secondary pollution.
Since the 21 st century, the electrolytic aluminum industry in China is rapidly developed, the electrolytic aluminum yield in China reaches 3227 ten thousand tons in 2017, the capacity breaks through 4000 ten thousand tons, the electrolytic aluminum is continuously located in the world first, and the yield accounts for 57 percent of the total amount of the world. Meanwhile, the environmental pollution problem of the electrolytic aluminum industry has received a high degree of attention from the nation, industry and society. The overhaul slag is typical harmful solid waste discharged in the electrolytic aluminum production process, 20-30kg of overhaul slag is generated for each ton of electrolytic aluminum production on average, and the annual discharge amount reaches millions of tons. Because the overhaul residues contain soluble fluoride and cyanide with high toxicity, if the overhaul residues are not properly treated, the overhaul residues can be mixed into rivers along with rainwater and permeate into the underground to pollute surface water sources, underground water and soil, and great harm is caused to the surrounding ecological environment, human health and animal and plant growth. The harmless recycling treatment of the overhaul slag becomes one of the major problems to be solved urgently in the electrolytic aluminum industry.
At present, the treatment mode of the electrolytic bath overhaul slag in China mainly adopts landfill, and the construction of a landfill slag yard has high management requirements because of the risk of polluting an underground water system. The following difficulties mainly exist: 1. the site selection is difficult, particularly, the current environmental protection policy and standard are strict, the environment protection consciousness of residents is strong, and great difficulty is added to the site selection; 2. the construction seepage-proofing requirement is high, and the construction investment of a landfill site is large; 3. leachate is generated in the stacking process, and the risk of pollution of underground water and surface water exists when the leachate is not well treated. And the landfill is only a temporary disposal mode, is not a thorough disposal mode, and can leave a later history problem.
For example, the invention of application No. CN201310355679.1 discloses a method for treating carbon slag in an electrolytic cell, which comprises, during the electrode changing and edge trimming of the electrolytic cell, laying the carbon slag to be treated in the sealed ultrafine particles along with the conventional electrode sealing procedure, wherein the carbon slag spontaneously combusts to generate gas emission, and the electrolyte in the carbon slag condenses and enters the electrolytic cell, thereby maximally recovering the electrolyte in the carbon slag. The treatment method does not influence the normal operation of the electrolytic cell, reduces the procedures of stacking, transporting and treating the carbon slag, greatly reduces the labor intensity, saves the labor time, improves the production efficiency and eliminates the pollution of the procedures to the environment; the method has the advantages of simple process and convenient operation, realizes the recycling of the electrolyte in the carbon slag, does not need to invest any cost and equipment, and is suitable for large-scale industrial application.
However, how to fully utilize the existing equipment to carry out resource utilization and harmless treatment on the cathode carbon block of the electrolytic aluminum is also a problem to be solved in the field of pollutant cooperative control at present.
Disclosure of Invention
In view of the above-mentioned drawbacks, the present invention aims to provide a system and a method for preparing alternative fuel for cement kilns from cathode carbon blocks of electrolytic aluminum, which can realize effective utilization of resources and perform harmless disposal of the cathode carbon blocks of electrolytic aluminum.
In order to achieve the above object, the present invention provides a system for preparing cement kiln alternative fuel using electrolytic aluminum cathode carbon blocks, comprising: the material receiving and crushing system at least comprises a crushing device, wherein the crushing device receives and crushes solid materials containing the electrolytic aluminum cathode carbon blocks into crushed materials; and the grinding system at least comprises a grinding device communicated with the crushing device, and the grinding device receives the crushed material and grinds the crushed material into powdery material, wherein the powdery material is used as alternative fuel of the cement kiln.
In an embodiment of the present invention, the grinding system further includes a gas-solid separation device and a fan, the gas-solid separation device is communicated with the grinding device through a pipeline, and the fan is communicated with the gas-solid separation device, wherein the powdery material in the grinding device can enter the gas-solid separation device through the pipeline under the action of wind power of the fan and is separated to obtain a separated powdery material.
In an embodiment of the invention, the grinding device is a vertical roller mill, and the gas-solid separation device is a bag type dust collector.
In an embodiment of the invention, the material receiving and crushing system further includes a rotary feeder, a first conveying device for conveying the crushed material is disposed between the rotary feeder and the crushing device, and the crushed material is discharged into the grinding device after being locked by the rotary feeder.
In an embodiment of the present invention, the crushing device is a crusher, and a receiving hopper is configured above the crusher; the material receiving and crushing system further comprises a discharge pit for receiving the solid materials, and a grab bucket is arranged between the discharge pit and the receiving hopper and used for grabbing the solid materials in the discharge pit into the receiving hopper.
In an embodiment of the present invention, the preparation system further includes: and the kiln feeding system at least comprises a second conveying device, and the second conveying device receives the powdery material and conveys the powdery material into the cement kiln decomposing furnace.
In an embodiment of the present invention, the feeding system further includes: the storage bin is used for storing the alternative fuel and is arranged behind the grinding system.
In an embodiment of the present invention, the feeding system further includes: the metering device is used for controlling uniform discharging and is arranged behind the storage bin and in front of the first conveying device; and/or the scattering device for scattering materials is arranged at the kiln inlet of the cement kiln decomposing furnace.
In order to achieve the above object, the present invention further provides a method for preparing a cement kiln alternative fuel by using an electrolytic aluminum cathode carbon block, which is prepared by using the preparation system as described above, the method comprising: receiving a solid material containing electrolytic aluminum cathode carbon blocks through a material receiving and crushing system and crushing the solid material into a crushed material; and receiving the crushed material through a grinding system and grinding the crushed material into powdery material, wherein the powdery material is used as alternative fuel of the cement kiln.
In another embodiment of the present invention, the preparation method further comprises: and receiving the powdery material through a conveying kiln entering system and conveying the powdery material into a cement kiln decomposing furnace.
The invention realizes the purpose of preparing the alternative fuel of the cement kiln by utilizing the electrolytic aluminum cathode carbon block by utilizing the fuel characteristic of the cement kiln and relying on a cement kiln system. The invention also realizes the harmless disposal of the electrolytic aluminum cathode carbon block by utilizing the advantages of high temperature, alkaline environment and solid phase reaction of the cement kiln to solidify heavy metal. The invention also realizes that the cathode carbon block enters the kiln in a powdery form by adopting the pre-crushing and grinding pretreatment, and is more in line with the characteristics of the cement kiln calcination process. The invention also effectively improves the grinding efficiency by adopting the grinding mode of the vertical roller mill.
Drawings
FIG. 1 is a schematic structural diagram of a system for preparing cement kiln alternative fuel by using electrolytic aluminum cathode carbon blocks according to a preferred embodiment of the invention;
FIG. 2 is a schematic flow chart of the method for preparing cement kiln alternative fuel by using electrolytic aluminum cathode carbon blocks according to a preferred embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a preparation system for preparing cement kiln alternative fuel by using electrolytic aluminum cathode carbon blocks, which mainly comprises a material receiving and crushing system and a grinding system. The material receiving and crushing system at least comprises a crushing device, and the crushing device receives and crushes solid materials containing the electrolytic aluminum cathode carbon blocks into crushed materials. The grinding system at least comprises a grinding device communicated with the crushing device, and the grinding device receives the crushed materials and grinds the crushed materials into powdery materials, wherein the powdery materials are used as alternative fuels of the cement kiln. Preferably, the grinding device may be, for example, but not limited to, a vertical roller mill of a cement kiln system, and includes CO2The waste gas can be conveyed into the vertical roller mill。
In the present invention, the solid material includes, but is not limited to, cathode carbon blocks generated in the electrolytic process of electrolytic aluminum, such as electrolytic aluminum overhaul residues, for example, waste cathode carbon blocks removed from an aluminum electrolysis cell in a overhaul process after 4 to 7 years of operation, which are solid massive hard materials.
In an embodiment of the present invention, the grinding system may further include a gas-solid separation device and a fan, the gas-solid separation device is communicated with the grinding device through a pipeline, and the fan is communicated with the gas-solid separation device. The powder material in the grinding device can enter the gas-solid separation device through the pipeline under the action of the wind power of the fan and is separated to obtain the separated powder material. Preferably, the gas-solid separation device may be, for example, a bag-type dust collector, but is not limited thereto. By designing the fan, qualified products can be selected from the vertical roller mill, for example, powder particles with a certain particle size can be discharged out of the mill along with airflow and can be collected by the bag type dust collector, and the product is obtained. And C in the ground powdery material can replace fire coal to serve as a substitute fuel for a cement kiln, and inorganic components in the powdery material can serve as raw materials for cement production, so that the effective recycling of solid wastes such as overhaul residues and the like is realized.
In an embodiment of the present invention, the material receiving and crushing system may further include a rotary feeder, and a first conveying device, such as a belt conveyor, for conveying the crushed material is disposed between the rotary feeder and the crushing device, and the crushed material is discharged into the grinding device after being locked by the rotary feeder.
In an embodiment of the present invention, the crushing device is a crusher, and a receiving hopper is disposed above the crusher. The material receiving and crushing system can further comprise a discharge pit for receiving the solid materials, and a grab bucket is arranged between the discharge pit and the receiving hopper and used for grabbing the solid materials in the discharge pit into the receiving hopper.
In an embodiment of the present invention, the preparation system may further include a feeding system, which includes at least a second feeding device, and the second feeding device may receive the powdery material and feed the powdery material into the cement kiln decomposition furnace. The second conveying device may be, for example, a pneumatic conveying device, which may use compressed air as power for conveying, but is not limited thereto. Preferably, the feeding system further comprises a storage bin disposed behind the pulverizing system for storing the product as an alternative fuel. Preferably, the feeding system may further comprise a metering device and/or a scattering device. The metering device, such as but not limited to a belt scale, is disposed after the storage bin and before the first conveying device to control uniform discharge. The scattering device is arranged at the kiln inlet of the cement kiln decomposing furnace and is used for scattering materials. Wherein the input of compressed air is also acceptable in the breaking device.
Referring to fig. 1, there is shown a construction of a system for manufacturing alternative fuel for cement kiln using electrolytic aluminum cathode carbon blocks by means of a cement kiln system according to a preferred embodiment of the present invention. Preferably, the preparation system 100 comprises three subsystems: a material receiving and crushing system 101, a grinding system 102 and a conveying kiln-entering system 103.
The material receiving and crushing system 101 is composed of a discharge pit 1, a grab bucket 2, a receiving hopper 3, a crusher 4, a belt conveyor 5 and a rotary blanking device 6, and solid materials entering the system can be crushed into crushed materials through the system, for example, large cathode carbon blocks can be crushed into small blocky materials, so that basic conditions are provided for the material grinding effect, and in addition, the crushed materials can be conveyed to a grinding system.
The grinding system 102 is composed of a vertical roller mill 7, a bag type dust collector 8 and a fan 9, and the materials can be ground into powdery materials through the vertical roller mill 7, so that the particle size of the materials entering the kiln can be matched with the technological requirements of calcination in the cement kiln. The ground powdery material can be used as a substitute fuel for the cement kiln.
The conveying kiln-entering system 103 is composed of a storage bin 10, a belt weigher 11, a pneumatic conveying device 12 and a scattering device 13, and ensures that materials are uniformly dispersed and enter the kiln.
The invention can utilize cathode carbon blocks of electrolytic aluminum to prepare cement kiln alternative fuel by the preparation system shown in figure 1. As shown in fig. 2, a preparation method 200 according to a preferred embodiment of the present invention mainly includes the following steps:
In the present invention, the preparation method may further include:
and step 203, receiving the powdery material through a conveying kiln entering system and conveying the powdery material into a cement kiln decomposing furnace.
More specifically, referring to fig. 1, the preparation system of the present invention can prepare a cement kiln alternative fuel using solid waste such as cathode carbon blocks generated during the maintenance of electrolytic aluminum, which may include the following process steps:
a. the collected and transported cathode carbon blocks are firstly discharged into a discharge pit 1.
b. The grab bucket 2 lifts the cathode carbon blocks in the discharge pit 1 into the receiving hopper 3.
c. The receiving hopper 3 uniformly conveys the materials into the crusher 4.
d. The material crushed by the crusher 4 is conveyed into the rotary blanking device 6 by the belt conveyor 5, and the material is discharged into the vertical roller mill 7 after the air lock of the rotary blanking device 6.
e. The vertical roller mill 7 further grinds the crushed material into powdery particles, i.e., into a powdery material. The vertical roller mill 7 can grind materials by adopting a roller grinding and grinding mode.
f. The fan 9 provides wind power for the vertical roller mill 7, and powder materials are selected out through the wind power and are brought into the bag type dust collector 8 through a pipeline.
h. The bag type dust collector 8 is a gas-solid separation device and can separate out powdery materials in the waste gas.
i. The separated powdery material is a substitute fuel and can be conveyed to the storage bin 10 to be stored as a product.
k. The powdery material is discharged from the storage bin 10 to a belt weigher 11.
And l, controlling uniform discharging through a belt weigher 11, and conveying the prepared alternative fuel to a cement kiln decomposing furnace 14 through a pneumatic conveying device 12.
m. arranging a scattering device 13 at the kiln inlet of the cement kiln decomposing furnace 14 to ensure that the alternative fuel can be uniformly scattered and enter the kiln.
The invention can realize the purpose of comprehensively utilizing the cathode block as the alternative fuel of the cement kiln by utilizing the fuel characteristic of the cement kiln. The invention can realize harmless disposal of cathode carbon blocks of electrolytic aluminum by utilizing the advantages of high temperature, alkaline environment and solid-phase reaction of the cement kiln to solidify heavy metals. The invention can realize that the cathode carbon block enters the kiln in a powdery form by adopting the pre-crushing and grinding pretreatment, and is more in line with the characteristics of the cement kiln calcination process. The vertical roller mill is adopted for grinding, so that the grinding efficiency can be effectively improved.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A preparation system for preparing alternative fuel of a cement kiln by using electrolytic aluminum cathode carbon blocks is characterized by comprising the following components:
the material receiving and crushing system at least comprises a crushing device, wherein the crushing device receives and crushes solid materials containing the electrolytic aluminum cathode carbon blocks into crushed materials;
and the grinding system at least comprises a grinding device communicated with the crushing device, and the grinding device receives the crushed material and grinds the crushed material into powdery material, wherein the powdery material is used as alternative fuel of the cement kiln.
2. The preparation system of claim 1, wherein the grinding system further comprises a gas-solid separation device and a fan, the gas-solid separation device is communicated with the grinding device through a pipeline, and the fan is communicated with the gas-solid separation device, wherein the powdery material in the grinding device can enter the gas-solid separation device through the pipeline under the action of wind power of the fan and is separated to obtain the separated powdery material.
3. The manufacturing system of claim 2, wherein the milling device is a vertical roller mill, and the gas-solid separation device is a bag collector.
4. The preparation system of claim 1, wherein the material receiving and crushing system further comprises a rotary feeder, a first conveying device for conveying the crushed material is arranged between the rotary feeder and the crushing device, and the crushed material is discharged into the grinding device after being locked by the rotary feeder.
5. The preparation system according to claim 4, wherein the crushing device is a crusher, and a receiving hopper is arranged above the crusher; the material receiving and crushing system further comprises a discharge pit for receiving the solid materials, and a grab bucket is arranged between the discharge pit and the receiving hopper and used for grabbing the solid materials in the discharge pit into the receiving hopper.
6. The manufacturing system of claim 1 or 2 or 3 or 4 or 5, further comprising:
and the kiln feeding system at least comprises a second conveying device, and the second conveying device receives the powdery material and conveys the powdery material into the cement kiln decomposing furnace.
7. The manufacturing system of claim 6, wherein said feed-into-kiln system further comprises:
the storage bin is used for storing the alternative fuel and is arranged behind the grinding system.
8. The manufacturing system of claim 7, wherein said feed-into-kiln system further comprises:
the metering device is used for controlling uniform discharging and is arranged behind the storage bin and in front of the first conveying device; and/or the presence of a catalyst in the reaction mixture,
the scattering device is used for scattering materials and is arranged at the kiln inlet of the cement kiln decomposing furnace.
9. The preparation method for preparing the cement kiln alternative fuel by using the electrolytic aluminum cathode carbon block is characterized by being prepared by using the preparation system as claimed in any one of claims 1 to 8, and comprises the following steps:
receiving a solid material containing electrolytic aluminum cathode carbon blocks through a material receiving and crushing system and crushing the solid material into a crushed material;
and receiving the crushed material through a grinding system and grinding the crushed material into powdery material, wherein the powdery material is used as alternative fuel of the cement kiln.
10. The method of manufacturing according to claim 9, further comprising:
and receiving the powdery material through a conveying kiln entering system and conveying the powdery material into a cement kiln decomposing furnace.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011245652.3A CN114453113A (en) | 2020-11-10 | 2020-11-10 | Preparation system and preparation method of alternative fuel for cement kiln |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011245652.3A CN114453113A (en) | 2020-11-10 | 2020-11-10 | Preparation system and preparation method of alternative fuel for cement kiln |
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| CN114453113A true CN114453113A (en) | 2022-05-10 |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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