CN115124037A - High-sugar honey briquette crushed charcoal and method for producing high-sugar honey briquette crushed charcoal - Google Patents
High-sugar honey briquette crushed charcoal and method for producing high-sugar honey briquette crushed charcoal Download PDFInfo
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Abstract
The invention relates to high-sugar-honey briquette crushed charcoal and a method for producing the high-sugar-honey briquette crushed charcoal, wherein the high-sugar-honey briquette crushed charcoal is prepared by mixing weakly caking coal A and weakly caking coal B as initial materials; wherein the weakly caking coal A is weakly caking coal of a Shenmu coal 3-1 coal bed, and the weakly caking coal B is weakly caking coal of a Shenmu coal 2-2 coal bed. According to the scheme of the invention, the weakly caking coal of the Shenmu coal 2-2 coal layer is added into the weakly caking coal of the Shenmu coal 3-1 coal layer in a certain proportion, and the requirement of improving the molasses value index of the generated briquette crushed carbon is realized through the processes of forming, carbonizing and activating.
Description
Technical Field
The invention relates to the technical field of briquette crushed charcoal, in particular to high-sugar honey briquette crushed charcoal and a production method thereof.
Background
The briquette crushed carbon is used as an active carbon product, and the production raw materials mostly adopt a single coal type with certain cohesiveness as a raw material to be mixed with caking materials such as coal pitch and the like, and the coal-based briquette active carbon is produced by grinding, briquetting, carbonization and activation processes, or by referring to a coal blending coking technology, gas coal and fat coal with special cohesiveness are matched with other coal types such as anthracite, lignite and the like, sometimes binders such as coal pitch or coal tar and the like are added and mixed evenly, or before activation after carbonization, the coal-based briquette active carbon is produced by the briquetting, drying, carbonization and activation processes.
The residues of coal-based briquette crushed carbon, coal pitch and the like produced by the method usually block the pores of the activated carbon, so the molasses value of the produced activated carbon is less than 160, even the molasses value is 0, the requirement of removing organic macromolecules is difficult to meet, and the decolorizing effect is poor. In addition, the process flow is complex, and gas coal and fat coal with high quality and special caking property are used, so the production cost of the activated carbon is high. In the existing method, in order to enlarge the aperture of the activated carbon and improve the proportion of medium and large pores of the activated carbon, the method of prolonging the activation time is generally adopted, thereby causing the burning loss of the activated carbon in an activation furnace to be increased, the strength to be reduced and the service life to be shortened. In the preparation process of the raw material coal, other substances which are beneficial to improving the porosity in the preparation process of the activated carbon, such as nitrates of iron, cobalt and the like, are added, so that the cost of the produced activated carbon product is increased, and large-scale production cannot be realized, or the cost is increased by soaking magnesium nitrate and the like before activation after carbonization, the process flow is lengthened, and the production efficiency is reduced.
Disclosure of Invention
The invention aims to provide high-sugar honey briquetting crushed carbon and a production method thereof, and solves the problems that the molasses value of the briquetting crushed carbon is low, and the activation time is prolonged in order to improve the molasses value of the activated carbon in the conventional method, so that the burning loss of the activated carbon in an activation furnace is increased, the strength is reduced, and the service life is shortened.
In order to achieve the above object, the present invention provides a high molasses briquette crushed charcoal, wherein the starting material for preparing the high molasses briquette crushed charcoal is a mixture of weakly caking coal A and weakly caking coal B; wherein the weakly caking coal A is weakly caking coal of a Shenmu coal 3-1 coal bed, and the weakly caking coal B is weakly caking coal of a Shenmu coal 2-2 coal bed.
According to one aspect of the invention, the weakly caking coal B is present in the starting material in an amount of 20% to 40% by mass.
According to one aspect of the invention, the high molasses briquette crushed charcoal has a molasses number greater than 200, methylene blue greater than 180mg/g, drum strength greater than 94%, and iodine number greater than 950 mg/g.
According to one aspect of the invention, the fineness of the initial charge satisfies a sieve fraction of more than 80% on a 325 mesh tyler standard sieve.
According to one aspect of the present invention, the weakly caking coal a satisfies: ash content is less than or equal to 4.5 percent (wt%), volatile matter is 33-38 percent (wt%), the coke slag is characterized by 3-4 type, and the stacking specific weight is 800-;
the weakly caking coal B satisfies: ash content is less than or equal to 4.5 percent (wt%), volatile matter is 33-38 percent (wt%), the coke slag is characterized by 3-4 type, and the stacking specific weight is 700-780 g/l.
In order to realize the aim, the invention provides a method for producing high-sugar honey briquette crushed charcoal, which comprises the following steps:
s1, mixing and grinding weakly caking coal A and weakly caking coal B to obtain powdery initial materials;
s2, carrying out extrusion forming on the basis of the initial material through a briquetting machine to obtain a forming material;
s3, carrying out carbonization treatment based on the molding material to obtain a carbonized material;
and S4, activating the carbonized material to obtain the high-sugar honey briquette crushed carbon.
According to one aspect of the present invention, in step S1, the weakly caking coal B is present in the starting material in an amount of 20% to 40% by mass.
According to one aspect of the invention, the high molasses briquettes have a molasses number greater than 200 for crushed char.
According to one aspect of the invention, the high sugar honey compact broken methylene blue is greater than 180 mg/g.
According to one aspect of the invention, the roller strength of the crushed coal of the high-sugar honey briquettes is greater than 94%.
According to one aspect of the invention, the iodine value of the crushed charcoal of the high-sugar honey briquettes is greater than 950 mg/g.
According to one aspect of the invention, the fineness of the initial charge satisfies a sieving rate of more than 80% on a 325 mesh tyler standard sieve.
According to one aspect of the invention, the roller strength of the molding compound is greater than 85%.
According to an aspect of the invention, in the step S3, in the step of obtaining the carbonized material based on the molding material, the molding material is carbonized and dry distilled in a carbonization furnace to obtain the carbonized material;
the temperature of the furnace tail of the carbonization furnace is controlled to be 260-350 ℃, the temperature of the furnace is controlled to be 450-500 ℃, and the temperature of the furnace head is controlled to be 550-620 ℃;
the power of a transmission motor of the carbonization furnace is 11KW, and the frequency is set to be 20-26 Hz.
According to an aspect of the present invention, in the step of activating the carbonized material to obtain the crushed high sugar honey briquettes in step S4, the activating agents used are steam and flue gas.
According to an aspect of the present invention, in the step S4, in the step of obtaining the high molasses briquetting crushed charcoal based on the activation treatment of the carbonized material, the carbonized material is activated in an activation furnace to obtain the high molasses briquetting crushed charcoal;
the activation furnace comprises: the device comprises a preheating section, a supplementary carbonization section, an activation section, a first cooling section, a second cooling section, an upper connecting flue, a lower connecting flue and a regenerative chamber;
the activation section is provided with a fifth point position, a sixth point position, a seventh point position and an eighth point position which are used for controlling temperature.
According to an aspect of the present invention, the control temperatures of the fifth point location, the sixth point location, the seventh point location, and the eighth point location are: 920 to 970 ℃.
According to one aspect of the invention, the steam pressure of the activation furnace is 0.35-0.5MPa, and the steam flow is 1.5-3.0m 3 Air flow rate of 500- 3 The furnace pressure is 55-95Pa, and the suction force is 120-160 Pa.
According to one aspect of the invention, in step S1, the weakly caking coal a is weakly caking coal of a 3-1 coal seam of sago coals, and satisfies the following conditions: ash content is less than or equal to 4.5 percent (wt%), volatile matter is 33-38 percent (wt%), the coke slag is characterized by 3-4 type, and the stacking specific weight is 800-;
the weakly caking coal B is weakly caking coal of a 2-2 coal bed of the Shenmu coal, and meets the following requirements: ash content is less than or equal to 4.5 percent (wt%), volatile matter is 33-38 percent (wt%), the coke slag is characterized by 3-4 type, and the stacking specific weight is 700-.
Beneficial effect behind the above-mentioned technical scheme:
by adding a certain amount of weakly caking coal of the shenmuke coal layer 2-2 in weakly caking coal of the shenmuke coal layer 3-1, the molasses value index of the briquette crushed carbon (namely, activated carbon) prepared by performing dry powder compression molding on the weakly caking coal without adding any caking materials such as coal pitch, fat coal and the like is higher, and the high molasses crushed carbon with the strength of more than 94% and higher iodine value can be obtained.
The briquette crushed carbon generated by the scheme has the characteristics of large adsorption capacity, high adsorption speed, high organic macromolecule removal rate and strong decoloring capacity.
The fineness of the initial material of the invention reaches the fineness, so that the method is favorable for generating pores and strength of subsequently generated high-sugar honey briquette crushed carbon and ensuring the high performance of the product of the invention.
The prepared briquette crushed carbon product has a molasses value of more than 200, methylene blue of more than 180mg/g, an iodine value of more than 950mg/g and roller strength of more than 94 percent, namely the activated carbon product has developed medium and large pores and a high iodine value.
The preparation method is simple in preparation process, and any viscous materials such as coal pitch and fat coal are not added in the traditional preparation process of the coal-based activated carbon in the forming process, so that the problems of product quality reduction caused by nonuniform mixing due to the use of the viscous materials, environmental pollution in the production process caused by large dust emission in the use of the coal pitch and high cost caused by addition of the viscous materials are solved, and the production efficiency can be improved.
The product prepared by the method can eliminate the mixing and stirring process, the sedimentation process, the filter-pressing separation process and the slag removal process for preparing the traditional high-sugar wood activated carbon; a large number of personnel can be reduced, the production period is shortened, the energy is saved, and the yield is improved; the strength of the prepared high-sugar honey briquette crushed carbon is more than 94 percent, the requirements of activated carbon regeneration equipment and regeneration technology are met, the used briquette crushed carbon can be repeatedly used after regeneration, and the material cost is greatly reduced.
Through scientific coal dressing, formula optimization and exploration process, the molasses value of the briquetted crushed carbon can reach more than 200, can replace wood powder activated carbon produced by a chemical method to decolor, and completely meets the index requirements of sugar factories, pharmaceutical factories and beverage factories.
Drawings
FIG. 1 is a block diagram schematically illustrating the process steps for producing a high sugar honey briquette crushed charcoal according to an embodiment of the present invention.
Detailed Description
The present invention is described in detail below with reference to the drawings and the specific embodiments, which are not repeated herein, but the embodiments of the present invention are not limited to the following embodiments.
High-molasses briquetting crushing carbon
According to one embodiment of the invention, in the high-sugar-honey briquette crushed charcoal, the initial material for preparing the high-sugar-honey briquette crushed charcoal is a mixture of weakly caking coal A and weakly caking coal B; wherein the weakly caking coal A is weakly caking coal of a Shenmu coal 3-1 coal bed, and the weakly caking coal B is weakly caking coal of a Shenmu coal 2-2 coal bed.
According to one embodiment of the invention, the weakly caking coal B is present in the starting material in an amount of 20% to 40% by mass.
According to one embodiment of the invention, the high molasses briquettes have a molasses number greater than 200, methylene blue greater than 180mg/g, drum strength greater than 94%, and iodine number greater than 950 mg/g.
According to one embodiment of the invention, the fineness of the initial charge satisfies a sieving rate of more than 80% on a 325 mesh tyler sieve.
According to one embodiment of the present invention, weakly caking coal a satisfies: ash content is less than or equal to 4.5 percent (wt%), volatile matter is 33-38 percent (wt%), the coke slag is characterized by 3-4 type, and the stacking specific weight is 800-900 g/l;
the weakly caking coal B satisfies: ash content is less than or equal to 4.5 percent (wt%), volatile matter is 33-38 percent (wt%), the coke slag is characterized by 3-4 type, and the stacking specific weight is 700-.
Preparation process of high-sugar honey briquetting crushed charcoal
As shown in fig. 1, according to an embodiment of the present invention, a method for producing a high molasses briquette crushed charcoal according to the present invention comprises the steps of:
s1, adding weakly caking coal (weakly caking coal B) of a Shenmu coal layer 2-2 into weakly caking coal (weakly caking coal A) of a Shenmu coal layer 3-1, and grinding to obtain a powdery initial material;
s2, performing extrusion forming on the basis of the initial material through a briquetting machine to obtain a forming material;
s3, carbonizing based on the molding material to obtain a carbonized material;
and S4, activating based on the carbonized material to obtain high-molasses pressed block crushed carbon.
According to one embodiment of the invention, in step S1, the weakly caking coal of the shenmuke 3-1 coal seam satisfies: ash content is less than or equal to 4.5 percent, volatile matter is 33-38 percent, and the coke residue is characterized by 3-4 types; the weakly caking coal of the 2-2 coal seams of the Shenmu coal meets the following requirements: ash content is less than or equal to 4.5 percent (wt%), volatile matter is 33-38 percent (wt%), the coke slag is characterized by 3-4 type, and the stacking specific weight is 700-.
As shown in fig. 1, according to an embodiment of the present invention, in step S1, the content of weakly caking coal in the coal seam of 2-2 of shenmuke in the starting material is 20-40% by mass.
Through the arrangement, the weakly caking coal of the shenmuke coal layer 2-2 is added into the weakly caking coal of the shenmuke coal layer 3-1, so that mesopores and macropores are easily formed during the activation reaction, and the method is favorable for effectively improving the performance of a finished product.
Through the arrangement, the weakly caking coal of the Shenmu coal 2-2 coal layer is added to the weakly caking coal of the Shenmu coal 3-1 coal layer, so that the requirement for improving the molasses value index of the generated briquetted crushed carbon (namely, activated carbon) is met.
According to one embodiment of the invention, the briquette crushed charcoal has a molasses number greater than 200. In the present embodiment, the iodine value of the briquette crushed charcoal is more than 950 mg/g. In this embodiment, the methylene blue of the briquette crushed carbon is greater than 180 mg/g. In the present embodiment, the drum strength of the briquette crushed charcoal is more than 94%.
High molasses briquetting broken carbon product index determination
The roller strength is a standard term, and the detection is that a sample is weighed and then placed into an instrument for vibration, friction and impact, then the sample is sieved according to a specified sieve, and the weight of the residual sample in the sieve is divided by the mass of the original sample by 100%, so the roller strength is the mass fraction. In the invention, the roller strength measuring method is implemented in GB/T7702.3-2008.
The methylene blue adsorption value can be used for representing the adsorption performance of a sample, and GB/T7702.6-2008 is adopted for measuring the methylene blue adsorption value.
The iodine value can be used for characterizing the development condition of the pore structure of the activated carbon and analyzing the adsorption performance of the activated carbon on other substances. In the invention, the method for measuring the iodine value of the activated carbon is implemented in GB/T7702.7-1987.
The molasses number is a measure of the relative decolorization capacity of activated carbon in boiling molasses solution. The molasses number means that the minimum pore size capable of entering the activated carbon is 2.8 nm. The molasses value is obtained by treating molasses with a standard sample of activated carbon and a sample of activated carbon to be tested, by calculating the ratio of the optical densities of the filtrates. In the present invention, the molasses value measuring method for activated carbon is carried out as follows.
Method for measuring molasses value of activated carbon
1. Preparation and calibration of caramel stock solution
Weighing 250g of glucose and 250ml of distilled water, dissolving the glucose and the distilled water in a 1L beaker, placing the beaker in a glycerol solution, stirring, adding 5g of anhydrous calcium carbonate when the temperature rises to 105 ℃, adding 5g of ammonium chloride when the temperature of sugar liquor rises to 110 ℃, keeping the temperature of the sugar liquor at 125 ℃ for 30 minutes, then slowly adding a sodium carbonate solution, continuously stirring until foams disappear, and cooling and placing the mixture into a refrigerator for later use.
Taking out from a refrigerator, weighing 20g of caramel stock solution, measuring 100ml of distilled water until the caramel stock solution is completely dissolved, taking 25ml of distilled water, adding 5ml of diluted sugar solution, and measuring the absorbance of the solution to 0.670-0.690 by using a spectrophotometer.
Heating the prepared sugar solution to 90 deg.C, taking off, cooling the ice-water mixture under stirring, cooling to 20 deg.C, cooling in refrigerator for 30min, and taking out.
2. Preparation and measurement of samples
Grinding an activated carbon sample to 90 percent, enabling the sample to pass through a 325-mesh sieve, drying the sample for 2 hours at 150 ℃, weighing 0.92g of the sample, adding 100ml of sugar solution, boiling the sample on an electric furnace for 30min, cooling and filtering the sample, measuring the sample by using a 5 x 10 cuvette, and measuring a standard sample by using the same method.
Calculating the molasses value as absorbance of standard sample/absorbance of test value
The briquette crushed carbon generated by the scheme has the characteristics of high proportion of medium and large pores, high removal rate of organic macromolecules and strong decoloring capacity.
As shown in fig. 1, according to one embodiment of the present invention, the fineness of the starting material satisfies a sieve fraction of more than 80% on a 325 mesh taylor standard sieve.
Through the arrangement, the fineness of the initial material reaches the fineness, so that the pore generation and the strength of the subsequently generated pressed and crushed carbon are facilitated, and the high performance of the product is ensured.
As shown in fig. 1, according to one embodiment of the present invention, the roll strength of the molding material is greater than 85%. In the present embodiment, the starting material is press-molded by a briquetting machine to obtain a molding material having a strength of more than 85%.
Through the setting, through the intensity of guaranteeing the shaping material in this scheme, and then it is beneficial to the off-the-shelf intensity and the finished product yield of follow-up formation.
As shown in fig. 1, in step S3, in the step of obtaining the carbonized material based on the molding material, the molding material is carbonized and retorted in a carbonization furnace to obtain the carbonized material. In the embodiment, the temperature of the furnace tail of the carbonization furnace is controlled to be 260-350 ℃, the temperature of the furnace is controlled to be 450-500 ℃, and the temperature of the furnace head is controlled to be 550-620 ℃. In the embodiment, the carbonization furnace is a rotary carbonization furnace, the power of a transmission motor of the carbonization furnace is 11KW, and the rotation frequency is set to be 20-26 Hz.
Through the arrangement, the working temperature and the motor frequency in the carbonization furnace are set within the range, so that the generated product has a high-strength effect.
According to one embodiment of the present invention, in step S4, in the step of obtaining the high molasses briquette crushed charcoal by performing the activation treatment based on the carbonized material, the activating agents used are water vapor and flue gas.
According to an embodiment of the present invention, in the step of performing an activation process based on the carbonized material to obtain the high molasses briquette crushed carbon, the carbonized material is subjected to an activation process in an activation furnace to obtain the high molasses briquette crushed carbon in step S4. In this embodiment, the activation furnace includes: the device comprises a preheating section, a supplementary carbonization section, an activation section, a first cooling section, a second cooling section, an upper connecting flue, a lower connecting flue and a regenerative chamber;
the first cooling section is provided with a first point position and a second point position for controlling temperature;
the second cooling section is provided with a third point position and a fourth point position for controlling temperature;
the activation section is provided with a fifth point position, a sixth point position, a seventh point position and an eighth point position which are used for controlling the temperature;
the supplementary carbonization section is provided with a ninth point and a tenth point for controlling the temperature;
the upper flue connecting section is provided with an eleventh point position and a twelfth point position for controlling temperature;
the heat storage section is provided with a thirteenth point and a fourteenth point for controlling temperature;
and the lower connecting flue connecting section is provided with a fifteenth point for controlling temperature.
As shown in fig. 1, according to one embodiment of the present invention, the control temperatures of the first and second sites are: 780-800 ℃;
the control temperatures of the third point location and the fourth point location are as follows: 880 to 900 ℃;
the control temperatures of the fifth point location, the sixth point location, the seventh point location and the eighth point location are as follows: 920 to 970 ℃;
the control temperature of the ninth point and the tenth point is as follows: 940-960 ℃;
the control temperature of the eleventh point and the twelfth point is as follows: 880-930 deg.C
The control temperature at the thirteenth point and the fourteenth point is as follows: 1020-1060 ℃.
The control temperature at the fifteenth point is as follows: 780-800 ℃.
According to one embodiment of the invention, the pressure of the steam (using water vapor) in the activation furnace is 0.35-0.5MPa, and the steam flow is 1.5-3.0m 3 Per, air (adopting air introduced from the outside) flow rate is 500- 3 The pressure of the furnace is 55-95Pa, the suction force is 120-160 Pa, and the activation time is 24-26 h. It should be noted that, during the activation treatment, the air flow and the steam flow can be adjusted according to the temperature and the furnace pressure.
Through the arrangement, the proportion of the medium and large pores of the product obtained by the scheme is improved, the form and the number of the pores meet the requirements, and the adsorption and decoloration effects in the using process are achieved. In addition, the activated material is the high-molasses pressed block crushed charcoal, and then the high-molasses pressed block crushed charcoal is obtained through screening, so that the effects that the molasses value of the product is more than 200, the methylene blue is more than 180mg/g, the iodine value is more than 950mg/g, the roller strength is more than 94% and the packing density is more than 380g/l are achieved.
To further illustrate the present invention, a number of examples are set forth below for further illustration.
Examples
Example 1
Taking weakly caking coal of a coal bed of Shenmu coal 3-1, grinding the weakly caking coal by a grinding machine until the fineness of an initial material meets the requirement that the sieving rate on a 325-mesh Taylor standard sieve is more than 80%, carrying out extrusion forming on a briquetting machine (the current requirement of the briquetting machine is 110-150A, the working pressure is 15MPa), then carrying out dry distillation carbonization treatment in a rotary carbonization furnace (the power of a transmission motor of the carbonization furnace is 11KW, the frequency is set to be 20-26 Hz) at the temperature of 300-620 ℃, obtaining a carbonized material after 30-40min, activating the carbonized material in an activation furnace by using water vapor and flue gas at the temperature of 920-970 ℃ for 24-26h to obtain activated carbon, measuring the molasses value, iodine value, strength and other indexes of the product, and finding out the molasses value 158 of the activated carbon to be lower than 200.
Example 2
Providing a coal type formula different from that of example 1 for experiment, mixing 10% of weakly caking coal of 2-2 coal bed of the nakedfish coal with 90% of weakly caking coal of 3-1 coal bed of the nakedfish coal by mass percent, preparing briquetted crushed carbon by grinding, molding, carbonizing and activating, wherein the process conditions are the same as those of example 1, and the molasses value, iodine value, strength and other indexes of the product are measured, and the molasses value of the activated carbon is found to be 192 and is lower than 200.
Example 3
Providing a coal type formula different from that of example 1 for experiment, mixing 20 mass percent of weakly caking coal of a 2-2 coal layer of the shenmuke coal with 80 mass percent of weakly caking coal of a 3-1 coal layer of the shenmuke coal, preparing briquetted crushed carbon by grinding, molding, carbonizing and activating, wherein the process conditions are the same as those of example 1, and the molasses value, the iodine value, the strength and other indexes of the product are measured to find that the molasses value of the activated carbon is 205, and other indexes are qualified, so that the briquetted crushed carbon with high molasses is obtained.
Example 4
Providing a coal type formula different from that of example 1 for experiment, mixing 30 mass percent of weakly caking coal of a 2-2 coal layer of the shenmuke coal with 70 mass percent of weakly caking coal of a 3-1 coal layer of the shenmuke coal, preparing briquetted crushed carbon by grinding, molding, carbonizing and activating, wherein the process conditions are the same as those of example 1, and the molasses value 211 of the activated carbon is found by measuring the molasses value, the iodine value, the strength and other indexes of the product, and the other indexes are qualified, so that the briquetted crushed carbon with high molasses is obtained.
Example 5
Providing a coal type formula different from that of example 1 for experiment, mixing 40 mass percent of weakly caking coal of a 2-2 coal layer of the shenmuke coal with 60 mass percent of weakly caking coal of a 3-1 coal layer of the shenmuke coal, preparing briquetted crushed carbon by grinding, molding, carbonizing and activating, wherein the process conditions are the same as those of example 1, and the molasses value 215 of the activated carbon is found by measuring the molasses value, the iodine value, the strength and other indexes of the product, and the other indexes are all qualified, so that the briquetted crushed carbon with high molasses is obtained.
Example 6
Providing a coal type formula different from that in example 1 for experiment, mixing 50% of weakly caking coal in a 2-2 coal layer of the nakeus coal with 50% of weakly caking coal in a 3-1 coal layer of the nakeus coal by mass percent, grinding, molding, carbonizing and activating to prepare briquetted crushed carbon, wherein the process conditions are the same as those in example 1, and the molasses value of the product is determined to be more than 200, the iodine value is less than 950mg/g, and the filling density is less than 380g/l (GB/T7701.2-2008 requires that the filling density is more than or equal to 380g/l), so that the briquetted crushed carbon is an unqualified product.
Example 7
Providing a coal type formula different from that of example 1 for experiment, mixing 60% of weakly caking coal of a 2-2 coal bed of the nakedfish coal with 40% of weakly caking coal of a 3-1 coal bed of the nakedfish coal, grinding, molding, carbonizing and activating to prepare briquetted crushed carbon, wherein the process conditions are the same as those of example 1, and the determined molasses value of the product is more than 200, the iodine value is less than 950mg/g, and the packing density is less than 380g/l (GB/T7701.2-2008 requires that the packing density is more than or equal to 380g/l), so that the product is a rejected product.
Example 8
Providing a coal type formula different from that of example 1 for experiment, mixing 70% of weakly caking coal of a 2-2 coal bed of the nakedfish coal with 30% of weakly caking coal of a 3-1 coal bed of the nakedfish coal by mass percent, grinding, molding, carbonizing and activating to prepare briquetted crushed carbon, wherein the process conditions are the same as those of example 1, and the measured molasses value of the product is more than 200, the iodine value is less than 950mg/g, and the packing density is less than 380g/l (GB/T7701.2-2008 requires that the packing density is more than or equal to 380g/l), so that the product is a rejected product.
Example 9
Providing a coal type formula different from that of example 1 for experiment, mixing 80% of weakly caking coal of a 2-2 coal bed of the nakedfish coal with 20% of weakly caking coal of a 3-1 coal bed of the nakedfish coal, grinding, molding, carbonizing and activating to prepare briquetted crushed carbon, wherein the process conditions are the same as those of example 1, and the determined molasses value of the product is more than 200, the iodine value is less than 950mg/g, and the packing density is less than 380g/l (GB/T7701.2-2008 requires that the packing density is more than or equal to 380g/l), so that the product is a rejected product.
Example 10
Providing a coal type formula different from that in example 1 for experiment, mixing weakly caking coal in a 2-2 coal layer of the shenmuke coal with the mass percent of the weakly caking coal in a 3-1 coal layer of the shenmuke coal with the mass percent of 10%, grinding, molding, carbonizing and activating to prepare briquetted crushed carbon, wherein the process conditions are the same as those in example 1, and the molasses value of the product is determined to be more than 200, the iodine value is less than 950mg/g, and the filling density is determined to be less than 380g/l (GB/T7701.2-2008 requires that the filling density is more than or equal to 380g/l), so that the briquetted crushed carbon is an unqualified product.
Example 11
Providing a coal type formula different from that of example 1, carrying out an experiment, taking weakly caking coal of a 2-2 coal bed of the nakedfish coal with the mass percent of 100%, preparing briquetting crushed carbon by grinding, molding, carbonizing and activating, wherein the process conditions are the same as those of example 1, and the measured product has the molasses value of more than 200, the iodine value of less than 950mg/g and the loading density of less than 380g/l (GB/T7701.2-2008 requires the loading density of more than or equal to 380g/l), and is a rejected product.
Table 1 shows the product properties of the briquetted crushed charcoal produced in examples 1 to 11. Table 1 is as follows:
TABLE 1
The data in Table 1 show that when the addition proportion of the weakly caking coal in the Shenmu 2-2 coal bed is 20-40%, the prepared briquetted crushed carbon has the best quality, the molasses value is more than 200, the iodine value is more than 950mg/g, the methylene blue is more than 180mg/g, the roller strength is more than 94%, the filling density is more than 380g/L, and the briquette coal is superior to the GB/T7701.2-2008 coal granular activated carbon standard.
Example 12
Mixing weakly caking coal of 30% of Shenmu 2-2 coal bed with weakly caking coal of 70% of Shenmu 3-1 coal bed, grinding to obtain powder material, setting the pressure of a briquetting machine to be 12MPa and the current to be 110A, and measuring the strength of the molding material.
Example 13
The briquette strength was measured using the same coal type formulation as in example 12, with a briquetting machine pressure of 15MPa and a current of 110A, which were different from those of example 12.
Example 14
The briquette strength was measured using the same coal type formulation as in example 12, with a briquetting machine pressure of 18MPa and a current of 110A, which were different from those of example 12.
As analyzed in examples 12 to 14, the briquetting machine pressure was 15 to 18MPa, the current was set to 110A, and the strength of the molding material was more than 85%, so that the briquetting machine pressure was best at 15 to 18 MPa.
Example 15
Mixing weakly caking coal of 30% of Shenmu 2-2 coal bed with weakly caking coal of 70% of Shenmu 3-1 coal bed, grinding to obtain powder material, setting the pressure of a briquetting machine to be 15MPa and the current to be 90A, and measuring the strength of the molding material.
Example 16
The briquette strength was measured by using the same coal type formulation as in example 15, providing a briquetting machine current different from that in example 15, and setting the briquetting machine pressure at 15MPa and the current at 110A.
Example 17
The briquette strength was measured by using the same coal type formulation as in example 15, providing a briquetting machine current different from that in example 15, and setting the briquetting machine pressure at 15MPa and the current at 130A.
Example 18
The briquette strength was measured by using the same coal type formulation as in example 15, providing a briquetting machine current different from that in example 15, and setting the briquetting machine pressure at 15MPa and the current at 150A.
Table 2 shows the product properties of the briquette crushed carbon molding materials produced in examples 12 to 18. Table 2 is as follows:
TABLE 2
As is clear from the analysis of the data in Table 2, the briquette strength was more than 85% when the briquetting machine pressure was 15MPa and the current was set to 110A-150A, and therefore the briquetting machine current was set to 110A-150A, which was the best.
Example 19
Mixing weakly caking coal of 30% of Shenmu 2-2 coal bed with weakly caking coal of 70% of Shenmu 3-1 coal bed, grinding to obtain powder material, setting the pressure of a briquetting machine to 15MPa and the current to 110A to obtain a molding material, feeding the molding material into a carbonization furnace, and measuring the strength and the volatile component of the carbonization material by adjusting the tail temperature of the carbonization furnace and keeping the temperature of the furnace and the furnace head unchanged.
Example 20
The difference from example 19 is that the temperature of the tail of the carbonization furnace, the formula of the coal type, the molding process and the temperature of the head of the carbonization furnace were unchanged, and the strength and the volatile content of the carbonized material were measured.
Example 21
The difference from example 19 is that the temperature of the tail of the carbonization furnace, the formula of the coal type, the molding process and the temperature of the head of the carbonization furnace were unchanged, and the strength and the volatile content of the carbonized material were measured.
Table 3 shows the properties of the briquetted crushed charcoal briquettes produced in examples 19 to 21. Table 3 is as follows:
TABLE 3
From the examples 19 to 21, it can be seen that the index of the carbonized material is the best when the temperature of the tail of the carbonization furnace is 260-.
Example 22
Mixing weakly caking coal of 30% of Shenmu 2-2 coal bed with weakly caking coal of 70% of Shenmu 3-1 coal bed, grinding to obtain powder material, setting the pressure of a briquetting machine to 15MPa and the current to 110A to obtain a molding material, feeding the molding material into a carbonization furnace, and measuring the strength and the volatile component of the carbonization material by adjusting the temperature in the carbonization furnace and keeping the temperature at the tail and the head of the furnace unchanged.
Example 23
The difference from the example 22 is that the temperature in the carbonization furnace, the coal type formula, the molding process and the temperatures of the tail and the head of the carbonization furnace are unchanged, and the strength and the volatile content of the carbonized material are measured.
Example 24
The difference from the example 22 is that the temperature in the carbonization furnace, the coal type formula, the molding process and the temperatures of the tail and the head of the carbonization furnace are unchanged, and the strength and the volatile content of the carbonized material are measured.
Table 4 shows the product properties of the briquetted crushed charcoal briquettes produced in examples 22 to 24. Table 4 is as follows:
TABLE 4
As can be seen from examples 22 to 24, the index of the carbonized material is the best when the temperature in the carbonization furnace is 450-.
Example 25
Mixing weakly caking coal of 30% of Shenmu 2-2 coal bed with weakly caking coal of 70% of Shenmu 3-1 coal bed, grinding to obtain powder material, setting the pressure of a briquetting machine to 15MPa and the current to 110A to obtain a molding material, feeding the molding material into a carbonization furnace, and measuring the strength and the volatile component of the carbonization material by adjusting the temperature of a carbonization furnace head, and keeping the temperature of a furnace tail and the temperature in the furnace unchanged.
Example 26
The difference from the example 25 is that the temperature of the carbonization furnace head, the formula of the coal type, the forming process and the temperature of the carbonization furnace tail and the furnace are unchanged, and the strength and the volatile content of the carbonization material are measured.
Example 27
The difference from the example 25 is that the temperature of the carbonization furnace head, the formula of the coal type, the forming process and the temperature of the carbonization furnace tail and the furnace are unchanged, and the strength and the volatile content of the carbonization material are measured.
Table 5 shows the product properties of the briquetted crushed charcoal briquettes produced in examples 25 to 27. Table 5 is as follows:
TABLE 5
From the examples 25 to 27, it can be seen that the index of the carbonized material is the best when the temperature of the carbonization furnace is 550-620 ℃ under the condition that the molding process is not changed and the temperatures of the carbonization furnace tail and the furnace are not changed.
Example 28
Mixing weakly caking coal of 30% of Shenmu 2-2 coal bed with 70% of weakly caking coal of Shenmu 3-1 coal bed, grinding to obtain powder material, setting the pressure of a briquetting machine to 15MPa, setting the current to 110A, making the formed material enter a carbonization furnace, controlling the temperature at the tail of the carbonization furnace to be 260-plus-350 ℃, the temperature in the furnace to be 450-plus-500 ℃, the temperature at the head of the carbonization furnace to be 550-plus-620 ℃, and detecting the indexes of iodine value, methylene blue, molasses value, strength and the like of the finished product briquette crushed carbon by adjusting the activation temperature.
Example 29
The difference from the example 28 is that the activation temperature, the coal type formula, the molding process and the temperature of the carbonization furnace are unchanged, and the indexes of iodine value, methylene blue, molasses value, strength and the like of the finished product briquette crushed carbon are detected.
Example 30
The difference from the example 28 is that the activation temperature, the coal type formula, the molding process and the temperature of the carbonization furnace are unchanged, and the indexes of iodine value, methylene blue, molasses value, strength and the like of the finished product briquette crushed carbon are detected.
Example 31
The difference from the example 28 is that the activation temperature, the coal type formula, the molding process and the temperature of the carbonization furnace are unchanged, and the indexes of iodine value, methylene blue, molasses value, strength and the like of the finished product briquette crushed carbon are detected.
Example 32
The difference from the example 28 is that the activation temperature, the coal type formula, the molding process and the temperature of the carbonization furnace are unchanged, and the indexes of iodine value, methylene blue, molasses value, strength and the like of the finished product briquette crushed carbon are detected.
Table 6 shows the product properties of the briquetted crushed charcoal produced in examples 28 to 32. Table 6 is as follows:
TABLE 6
From the examples 28-32, it can be seen that when the activation temperature is 920-.
According to the data in tables 1 to 6, in the scheme, weakly caking coal of Shenmu 2-2 coal seam and weakly caking coal of Shenmu 3-1 coal seam are mixed, pulverized and molded, when the mass percent of the weakly caking coal added in the Shenmu 2-2 coal seam is 20-40%, the pressure of a briquetting machine is 15-18MPa, the current is set to be 110A, the temperature of the tail of a carbonization furnace is 260-. The molasses value of the briquette crushed carbon prepared by using a single coal type is obviously lower, such as Shenmu 3-1 weakly caking coal, and the molasses value of an activated carbon product is less than 160, or the iodine value and the packing density are lower, such as the weakly caking coal of a Shenmu coal 2-2 coal bed, and the iodine value of the activated carbon product is less than 950 mg/g.
As the active carbon prepared from the Shenmu 2-2 coal bed weakly caking coal has developed macropores, the mesopore volume and the total pore volume are more developed than those of the active carbon prepared from the 3-1 coal bed weakly caking coal, the adsorption capacity is large, and the adsorption speed is high. However, the activated carbon prepared by only adopting 2-2 coal bed weakly caking coal has low filling density and iodine value and higher molasses value; the iodine value and the filling density of the activated carbon prepared by only adopting 3-1 coal bed weakly caking coal are higher, and the molasses value is lower. After two kinds of coal are mixed and blended according to a certain proportion, two kinds of weakly caking coal particles can be fused with each other, the advantages of the two kinds of coal are fully exerted, and various indexes of molasses value, methylene blue, iodine value, roller strength, filling density and the like of the prepared activated carbon are all qualified.
The molasses value is an important index of the decolorizing capacity of the activated carbon, the product pressed and crushed carbon obtained by the scheme not only has the methylene blue of more than 180mg/g, the iodine value of more than 950mg/g and the roller strength of more than 94 percent, and the product strength meets the requirements, reaches the first-grade standard of coal granular activated carbon for domestic water purification, but also has higher molasses value of more than 200, and proves that the activated carbon has excellent decolorizing capacity and can meet the requirement of removing organic macromolecules in the sugar, pharmaceutical and beverage industries. The foregoing is merely exemplary of particular aspects of the present invention and devices and structures not specifically described herein are understood to be those of ordinary skill in the art and are intended to be implemented in such conventional ways.
The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (19)
1. A high-sugar honey briquetting crushed charcoal is characterized in that the initial material for preparing the high-sugar honey briquetting crushed charcoal is a mixture of weakly caking coal A and weakly caking coal B; wherein the weakly caking coal A is weakly caking coal of a Shenmu coal 3-1 coal bed, and the weakly caking coal B is weakly caking coal of a Shenmu coal 2-2 coal bed.
2. The high sugar honey briquette crushed charcoal according to claim 1, wherein the content of the weakly caking coal B in the starting material is 20-40% by mass.
3. The high molasses briquette crushed charcoal according to claim 1, wherein the high molasses briquette crushed charcoal has a molasses number of more than 200, methylene blue of more than 180mg/g, roller strength of more than 94%, and iodine number of more than 950 mg/g.
4. The high molasses briquette crushed charcoal of claim 1, wherein the fineness of the starting material satisfies a sieve ratio of greater than 80% on a 325 mesh tyler standard sieve.
5. The high sugar honey briquette crushed charcoal according to claim 1, wherein the weakly caking coal A satisfies: ash content is less than or equal to 4.5 percent (wt%), volatile matter is 33-38 percent (wt%), the coke slag is characterized by 3-4 type, and the stacking specific weight is 800-;
the weakly caking coal B satisfies: ash content is less than or equal to 4.5 percent (wt%), volatile matter is 33-38 percent (wt%), the coke slag is characterized by 3-4 type, and the stacking specific weight is 700-.
6. A method for producing high-sugar honey briquetting crushed charcoal comprises the following steps:
s1, mixing and grinding weakly caking coal A and weakly caking coal B to obtain powdery initial materials;
s2, carrying out extrusion forming on the basis of the initial material through a briquetting machine to obtain a forming material;
s3, carrying out carbonization treatment based on the molding material to obtain a carbonized material;
and S4, activating the carbonized material to obtain the high-sugar honey briquette crushed carbon.
7. The method according to claim 6, wherein in step S1, the weakly caking coal B is contained in the starting material in an amount of 20% to 40% by mass.
8. The method of claim 6, wherein the high molasses briquetting crushed char has a molasses value of greater than 200.
9. The method of claim 6, wherein the high molasses briquetting broken carbon methylene blue is greater than 180 mg/g.
10. The method of claim 7, wherein the high molasses briquette crushed charcoal has a roller strength of greater than 94%.
11. The method of claim 8, wherein the iodine value of the high molasses briquetted crushed carbon is greater than 950 mg/g.
12. The method according to any one of claims 6 to 10, characterized in that the fineness of the initial charge satisfies a screening rate of more than 80% on a 325 mesh tyler standard sieve.
13. The method of claim 11, wherein the roll strength of the molding compound is greater than 85%.
14. The method according to claim 12, wherein in the step of obtaining the carbonized material based on the molded material in step S3, the molded material is carbonized and dry distilled in a carbonization furnace to obtain the carbonized material;
the temperature of the furnace tail of the carbonization furnace is controlled to be 260-350 ℃, the temperature of the furnace is controlled to be 450-500 ℃, and the temperature of the furnace head is controlled to be 550-620 ℃;
the power of a transmission motor of the carbonization furnace is 11KW, and the frequency is set to be 20-26 Hz.
15. The method of claim 13, wherein in step S4, the step of obtaining the high sugar honey briquette crushed charcoal by activating treatment based on the carbonized material uses water vapor and flue gas as activating agents.
16. The method as claimed in claim 14, wherein in the step of obtaining the high molasses briquette crushed charcoal by performing an activation process based on the carbonized material in step S4, the carbonized material is subjected to an activation process in an activation furnace to obtain the high molasses briquette crushed charcoal;
the activation furnace comprises: the device comprises a preheating section, a supplementary carbonization section, an activation section, a first cooling section, a second cooling section, an upper connecting flue, a lower connecting flue and a regenerative chamber;
the activation section is provided with a fifth point position, a sixth point position, a seventh point position and an eighth point position which are used for controlling temperature.
17. The method of claim 16, wherein the controlled temperatures at the fifth point location, the sixth point location, the seventh point location, and the eighth point location are: 920 to 970 ℃.
18. The method of claim 16, wherein the activation furnace has a steam pressure of 0.35-0.5MPa and a steam flow of 1.5-3.0m 3 Air flow rate of 500- 3 The furnace pressure is 55-95Pa, and the suction force is 120-160 Pa.
19. The method according to claim 16, wherein in step S1, the weakly caking coal a is a weakly caking coal of a shenmuke 3-1 coal seam, which satisfies: ash content is less than or equal to 4.5 percent (wt%), volatile matter is 33-38 percent (wt%), the coke slag is characterized by 3-4 type, and the stacking specific weight is 800-;
the weakly caking coal B is weakly caking coal of a 2-2 coal bed of the Shenmu coal, and meets the following requirements: ash content is less than or equal to 4.5 percent (wt%), volatile matter is 33-38 percent (wt%), the coke slag is characterized by 3-4 type, and the stacking specific weight is 700-780 g/l.
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