阅读说明：本技术 通过兰炭制备高粘度型煤的制造方法及型煤 (Manufacturing method for preparing high-viscosity briquette through semi coke and briquette ) 是由 李建军 李鑫 刘卫星 刘明锐 李改艳 于 2019-11-26 设计创作，主要内容包括：本发明公开一种通过兰炭制备高粘度型煤的制造方法及型煤,其包括将兰炭、腐殖酸盐颗粒、聚乙烯醇颗粒、膨润土颗粒、固体膨松剂、羧甲基纤维素钠颗粒以及固体固硫剂均研磨成粉末；将兰炭粉末投入至搅拌机中并持续进行搅拌,随后依次投入聚乙烯醇粉末、羧甲基纤维素钠粉末、膨润土粉末、膨松剂粉末以及固硫剂粉末,且每两个物料的投入均间隔一定的时间；将混合粉末通过轮碾碾压后放入挤棒机中挤压形成型煤。本发明公开的通过兰炭制备高粘度型煤的制造方法将腐殖酸盐、羧甲基纤维素钠等与兰炭混合,随后将聚乙烯醇、膨润土、氢氧化钙和氯化钠研磨后一同混合后通过挤压成型的型煤具有强度高、燃烧效果好且固硫率高的优点。(The invention discloses a method for preparing high-viscosity briquette by using semi-coke and the briquette, which comprises the steps of grinding semi-coke, humate particles, polyvinyl alcohol particles, bentonite particles, a solid swelling agent, sodium carboxymethylcellulose particles and a solid sulfur-fixing agent into powder; adding semi-coke powder into a stirrer, continuously stirring, sequentially adding polyvinyl alcohol powder, sodium carboxymethylcellulose powder, bentonite powder, leavening agent powder and sulfur fixing agent powder, and adding every two materials at a certain interval; and (3) rolling the mixed powder by a wheel mill, and then putting the rolled mixed powder into a rod extruding machine to extrude the mixed powder to form the shaped coal. The method for preparing the high-viscosity briquette by using the semi-coke disclosed by the invention mixes humate, sodium carboxymethylcellulose and the like with the semi-coke, then grinds polyvinyl alcohol, bentonite, calcium hydroxide and sodium chloride, mixes the ground polyvinyl alcohol, bentonite, calcium hydroxide and sodium chloride together, and then extrudes the formed briquette by extrusion, and has the advantages of high strength, good combustion effect and high sulfur fixation rate.)

1. A method for manufacturing high-viscosity briquette coal by semi coke, which is characterized by comprising the following steps:

step one, grinding semi-coke, humate particles, polyvinyl alcohol particles, bentonite particles, a solid leavening agent, sodium carboxymethyl cellulose particles and a solid sulfur-fixing agent into powder;

step two, putting the semi-coke powder into a stirrer and continuously stirring, and then sequentially putting polyvinyl alcohol powder, sodium carboxymethylcellulose powder, bentonite powder, leavening agent powder and sulfur-fixing agent powder, wherein the putting interval of every two materials is a certain time;

and step three, placing the mixed powder obtained in the step two into a rod extruding machine for extrusion to form the coal after wheel milling and rolling.

2. The method for manufacturing a high viscosity briquette through semi coke according to claim 1, wherein the first step comprises:

taking 12-24 parts of humate particles, 2-4 parts of polyvinyl alcohol particles, 4-8 parts of bentonite particles, 1-3 parts of solid leavening agent, 1-3 parts of solid sulfur-fixing agent, 2-4 parts of sodium carboxymethylcellulose particles and 800-1000 parts of semi coke by mass fraction, and grinding into powder with 50-150 meshes.

3. The method for manufacturing high viscosity briquettes according to claim 1, wherein the second step comprises:

adding semi-coke powder into a stirrer, continuously stirring, and then sequentially adding polyvinyl alcohol powder, sodium carboxymethyl cellulose powder, bentonite powder, leavening agent powder and sulfur fixing agent powder, wherein the interval between the two materials is 10-20 minutes.

4. The method for manufacturing a high-viscosity briquette through semi coke as set forth in claim 1, wherein the humate comprises sodium humate or ammonium humate.

5. The method of making a high viscosity briquette through semi-coke as claimed in claim 1, wherein the leavening agent is sodium chloride.

6. The method of claim 1, wherein the sulfur-fixing agent is sodium hydroxide or calcium oxide.

7. The method for manufacturing high-viscosity coal briquettes according to claim 1, wherein the content of humic acid in the humate is 4% to 10%.

8. A briquette, characterized in that the briquette is made by a method according to any one of claims 1-7.

Technical Field

The invention relates to the field of molded coal, in particular to a method for preparing high-viscosity molded coal by semi coke and the molded coal.

Background

The production of the briquette coal needs to be added with an adhesive, which is a core technology of the briquette coal technology, but in the existing briquette coal, the cold strength is often very low, so that a large amount of damage of the briquette coal can be caused in the processes of transportation, relocation and the like, and the problems of poor combustion effect, low sulfur fixation rate and the like in the combustion process are all existed in the manufacturing of the existing briquette coal.

Disclosure of Invention

The invention mainly aims to provide a method for preparing high-viscosity briquette by using semi-coke and the briquette, and aims to provide the briquette with high strength, good combustion effect and high sulfur fixation rate.

In order to achieve the aim, the invention provides a manufacturing method for preparing high-viscosity briquette coal by semi coke, which comprises the following steps:

step one, grinding semi-coke, humate particles, polyvinyl alcohol particles, bentonite particles, a solid leavening agent, sodium carboxymethyl cellulose particles and a solid sulfur-fixing agent into powder;

step two, putting the semi-coke powder into a stirrer and continuously stirring, and then sequentially putting polyvinyl alcohol powder, sodium carboxymethylcellulose powder, bentonite powder, leavening agent powder and sulfur-fixing agent powder, wherein the putting interval of every two materials is a certain time;

and step three, placing the mixed powder obtained in the step two into a rod extruding machine for extrusion to form the coal after wheel milling and rolling.

In one embodiment, the first step includes:

taking 12-24 parts of humate particles, 2-4 parts of polyvinyl alcohol particles, 4-8 parts of bentonite particles, 1-3 parts of solid leavening agent, 1-3 parts of solid sulfur-fixing agent, 2-4 parts of sodium carboxymethylcellulose particles and 800-1000 parts of semi coke by mass fraction, and grinding into powder with 50-150 meshes.

In one embodiment, the second step includes:

adding semi-coke powder into a stirrer, continuously stirring, and then sequentially adding polyvinyl alcohol powder, sodium carboxymethyl cellulose powder, bentonite powder, leavening agent powder and sulfur fixing agent powder, wherein the interval between the two materials is 10-20 minutes.

In one embodiment, the salt of humic acid comprises sodium or ammonium humate.

In one embodiment, the leavening agent is sodium chloride.

In one embodiment, the sulfur-fixing agent is sodium hydroxide or calcium oxide.

In one embodiment, the content of humic acid in the humate is 4-10%

The invention also provides the briquette prepared by the method for preparing the high-viscosity briquette by using the semi-coke.

According to the technical scheme, in the process of manufacturing the briquette, the humate is added to ensure that the coal dust can be fully polymerized, so that the subsequently produced briquette has higher strength, a large amount of damage can not be caused in the processes of transportation, movement and the like, and the integrity of the briquette is ensured.

The initial mechanical strength of the molded coal can be effectively improved by adding the sodium carboxymethyl cellulose, and meanwhile, the polyvinyl alcohol is a tackifier, so that the adhesive has strong adsorption capacity and high thermal stability, and the purpose of improving the bonding effect is achieved.

Meanwhile, in the manufacturing process of the molded coal, the bulking agent and the sulfur fixing agent are added, so that sulfur dioxide generated during combustion of the molded coal is reduced, the sulfur fixing rate of the molded coal is improved, and meanwhile, the ignition speed of the molded coal can be increased during combustion of the molded coal, so that the molded coal has a better combustion effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic flow chart of a manufacturing method of high-viscosity briquette coal by semi coke according to an embodiment of the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.

The invention provides a method for preparing high-viscosity briquette by semi coke, which comprises the following steps:

s1, taking 12-24 parts of humate particles, 2-4 parts of polyvinyl alcohol particles, 4-8 parts of bentonite particles, 1-3 parts of solid leavening agent, 1-3 parts of solid sulfur-fixing agent, 2-4 parts of sodium carboxymethylcellulose particles and 800-1000 parts of semi coke, and grinding into powder with 50-150 meshes;

step S2, adding semi-coke powder into a stirrer and continuously stirring, and then sequentially adding polyvinyl alcohol powder, sodium carboxymethyl cellulose powder, bentonite powder, leavening agent powder and sulfur-fixing agent powder, wherein the interval between the two materials is 10-20 minutes;

and S3, rolling the mixed powder obtained in the step S2 through a wheel mill, and then putting the rolled mixed powder into a rod extruding machine to extrude and form the molded coal.

Wherein, because calcium ion and magnesium ion can generate calcium humate or magnesium humate when reacting with humic acid, because its hydrophilicity is not as sodium humate, thereby can reduce the bonding effect by necessity, and the sediment can appear when the concentration is higher, the amount of effective humic acid has been lost, thereby can cause the cohesiveness of buggy between the moulded coal to be lower, and then the intensity of moulded coal has been weakened, consequently in optional embodiment, the humate can be through adopting sodium humate or ammonium humate, can effectively promote the intensity of moulded coal, simultaneously because the hydrophilicity order of humate is: the ammonium salt is more than the aluminum salt, the ferric salt is more than the calcium salt, and the sodium salt is less than the calcium salt, so that the sodium humate can be preferably used as the adhesive to ensure the strength of the briquette. And the moulded coal prepared by the humate can be dried after being used and manufactured, and when the moulded coal is dried, the moisture in the moulded coal can be evaporated, so that the humate can form a colloidal substance, and finally the moulded coal is shrunk and cured, so that the pulverized coal can be further firmly bonded, and the moulded coal has higher strength.

The briquette produced by the sodium humate and the coal has higher mechanical strength, and not only has molecular force, capillary force and friction force between the insides of the briquettes, but also has cementing capacity, adsorption capacity, complexing action and chelating action.

The adhesive solution prepared from the sodium humate is a viscous colloidal substance, has high viscosity, and can bond the coal dust particles together under the action of external force (such as a ball press, a rod extruder and the like). Meanwhile, the adhesive can ensure that the water in the molded coal is uniformly distributed, so that the surface of the coal particles (or the pulverized coal) is effectively wetted, the coal particles (or the pulverized coal) are adsorbed, the pulverized coal particles are tightly adsorbed together, and the mechanical strength of the subsequently manufactured molded coal can be improved.

Meanwhile, some reactive functional groups, such as "-OOCH", "-OH", etc., are included in the molecular structure of the adhesive,these reactive functional groups can react with metal ions (e.g., Fe) in the coal fines³⁺、Al³⁺、Ca²⁺、Mg²⁺) And oxides (e.g. Fe)₂O₃、Al₂O₃Etc.) to form stable complex and chelate, thereby providing strong binding force between coal particles (pulverized coal).

Preferably, the leavening agent is sodium chloride, and the sulfur-fixing agent is sodium hydroxide. The added sodium hydroxide can further react with humic acid contained in the sodium humate, the cold strength of the briquette can be obviously enhanced, and the calcium hydroxide can be used as a sulfur-fixing agent to reduce the generation of sulfur dioxide during the combustion of the briquette, thereby improving the sulfur-fixing rate of the briquette. The sodium chloride can promote ash on the surface of the coal briquette to fall off during combustion, and the bentonite is used for providing heat strength for the coal briquette.

Simultaneously, the initial mechanical strength of the molded coal can be effectively improved by adding the sodium carboxymethyl cellulose, and the polyvinyl alcohol is a tackifier, has strong adsorption capacity and high thermal stability, so that the purpose of improving the bonding effect is achieved.