CN111996057A - Preparation method of roasted tea charcoal for tea baking - Google Patents
Preparation method of roasted tea charcoal for tea baking Download PDFInfo
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- CN111996057A CN111996057A CN202010897384.7A CN202010897384A CN111996057A CN 111996057 A CN111996057 A CN 111996057A CN 202010897384 A CN202010897384 A CN 202010897384A CN 111996057 A CN111996057 A CN 111996057A
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- charcoal
- tea
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- coke
- fruit
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
- C10L5/447—Carbonized vegetable substances, e.g. charcoal, or produced by hydrothermal carbonization of biomass
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2270/00—Specifically adapted fuels
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/24—Mixing, stirring of fuel components
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/28—Cutting, disintegrating, shredding or grinding
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/32—Molding or moulds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
A preparation method of roasted tea charcoal for baking tea leaves comprises the following steps: s1, grinding: grinding the semi-coke and the fruit charcoal to obtain mixed carbon powder of the semi-coke and the fruit charcoal with the granularity of 70-100 meshes; s2, mud making: adding a binder to enable the mass ratio of the binder to the mixed carbon powder to be 1.5-5:50-70, stirring and mixing for 5-60min, adding water accounting for 30-50% of the mass of the mixed carbon powder, and continuously stirring and mixing until the mixture is uniform to obtain mixed carbon pug; s3, molding: forming by any one of screw extrusion, punching and roll forming, and drying to obtain the roasted tea charcoal. The semi-finished product is prepared by grinding the semi-finished product and the fruit charcoal into fine powder, adding the binder and water into the fine powder to prepare a paste, and preparing the paste into particles with uniform preset shapes and sizes by adopting the modes of spiral extrusion, stamping, roll forming and the like, so that the production cost of the fruit charcoal can be reduced, and the stacking density of the charcoal and the semi-finished product can be improved (the stacking density is increased) so as to solve the problem that the time for baking tea leaves by using the existing pure fruit charcoal as tea baking charcoal is too short, thereby being beneficial to obtaining the tea leaves with higher quality and reducing the tea baking cost.
Description
Technical Field
The invention relates to a baking material, in particular to a preparation method of baked tea charcoal for baking tea.
Background
The charcoal baking of tea leaves is a key process for improving the quality of tea leaves, and the operation process comprises firing, burning, ash covering, temperature control and the like. The main purposes of the tea leaf charcoal cultivation are to reduce the water content in the tea leaves, prevent the quality of the tea leaves from being deteriorated in the storage period, accelerate the fermentation rate of the tea leaves and improve the fragrance of the tea leaves.
The tea leaf baking tea usually adopts pure fruit wood charcoal for tea leaf baking, because the pure fruit wood charcoal has the basic pore diameter structure of charcoal, the humidity can be automatically adjusted in the tea leaf baking process, and sulfide, hydride, methanol, phenol, pesticide residues and the like remained in the tea leaves can be adsorbed, so that the quality and the taste of the tea leaves are greatly improved. At present, the pure fruit tree charcoal serving as tea baking charcoal also has the following defects:
(1) because the pure fruit wood charcoal has higher moisture and volatile components, the internal fiber pore structure is too rich, and the porosity is too large, so the pure fruit wood charcoal has the defects of vigorous combustion and too fast combustion rate in the tea leaf baking process, and the combustion time is too short. However, when tea leaves are roasted, slow fire is required for slow burning, and generally, the longer the tea leaves are roasted in a certain period of time, the better the quality of the tea leaves is.
(2) The traditional charcoal production process needs to firstly carry out carbonization treatment on wood at high temperature to prepare charcoal, the charcoal yield is less than 1/4, and byproducts such as wood gas, wood tar, wood vinegar and the like which account for about 3/4 of raw materials are directly discharged, so that the environment is polluted, and most resources cannot be recycled. Taking the fruit tree charcoal production as an example, at least 3t of wood raw materials are needed for producing 1t of fruit tree charcoal, 600 yuan is needed for each ton of wood, and other expenses such as labor cost, electricity cost and the like needed for wood processing are 1200 yuan, so that the total cost of each ton of charcoal is 3000 yuan, namely, each 1t of charcoal product is produced, and the comprehensive energy isThe consumption reaches 14000MJ and simultaneously generates about 1.6tCO2And harmful gases. A large amount of fruit wood charcoal materials are consumed for baking tea every year, forest resources are inevitably damaged, the production cost of charcoal such as fruit charcoal is always high, and the price of only 1t of fruit wood charcoal on the market is 3000-4000 yuan.
Disclosure of Invention
Technical problem to be solved
In view of the above disadvantages and shortcomings of the prior art, the invention provides a preparation method of roasted tea charcoal for baking tea leaves, which solves the technical problems of too fast burning rate, too short burning time, too high cost and the like of the current common fruit wood charcoal.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
in a first aspect, an embodiment of the present invention provides a method for preparing roasted tea charcoal for baking tea leaves, which includes the following steps:
s1, grinding: grinding the semi-coke and the fruit tree coke to obtain mixed carbon powder of the semi-coke and the fruit tree coke with the granularity of 70-100 meshes;
s2, mud making: adding a binder to enable the mass ratio of the binder to the mixed carbon powder to be 1.5-5:50-70, stirring and mixing for 5-60min, adding water accounting for 30-50% of the mass of the mixed carbon powder, and continuously stirring and uniformly mixing to obtain mixed carbon pug;
s3, molding: forming by any one of screw extrusion, punching and roll forming, and drying to obtain the roasted tea charcoal.
According to a preferred embodiment of the present invention, in step S1, the semi-coke and the fruit charcoal are ground into charcoal powder respectively and then mixed according to a certain ratio, or the semi-coke and the fruit charcoal are blended and ground according to a certain ratio to obtain mixed charcoal powder.
According to a preferred embodiment of the present invention, in step S1, the mass ratio of the semi-coke to the fruit charcoal is 1: 1-3.
According to a preferred embodiment of the present invention, in step S2, the adhesive is pregelatinized starch, CMC or dextrin.
According to a preferred embodiment of the present invention, in step S2, the adhesive is pregelatinized corn starch.
According to the preferred embodiment of the invention, in step S3, the mixed carbon paste is prepared into a prismatic, cylindrical or thumb-shaped blank by using a spiral extrusion forming method; preparing a cylindrical or prismatic blank by adopting a stamping forming mode; and preparing an ellipsoidal, heart-like or pentagram-shaped blank by adopting double-roll forming.
(III) advantageous effects
(1) The semi-finished product is prepared by grinding the semi-finished product and the fruit charcoal into fine powder, adding the binder and water into the fine powder to prepare a paste, and preparing the paste into particles with uniform preset shapes and sizes by adopting the modes of spiral extrusion, stamping, roll forming and the like, so that the production cost of the fruit charcoal can be reduced, and the stacking density of the charcoal and the semi-finished product can be improved (the stacking density is increased) so as to solve the problem that the time for baking tea leaves by using the existing pure fruit charcoal as tea baking charcoal is too short, thereby being beneficial to obtaining the tea leaves with higher quality and reducing the tea baking cost.
(2) The semi-coke has a certain specific surface area and a microporous structure, can be used for flue gas adsorption, not only has the physical adsorption advantage of charcoal, but also has oxygen-containing functional groups such as carbonyl, hydroxyl and the like on the surface, and is beneficial to the chemical adsorption of the flue gas in the tea baking process. The invention firstly proposes that the semi-coke is used for preparing the roasted tea charcoal for roasting tea leaves, the semi-coke and the fruit tree charcoal are molded to prepare the roasted tea charcoal for roasting the tea leaves, and the detection result shows that the residual harmful ingredients in the tea leaves are lower than that of the pure fruit tree charcoal roasted tea.
(3) The roasted tea charcoal prepared by the method has the advantages of high heat value, moderate volatile matter and adsorbability, durable combustion, low production cost and the like, and meets the requirement of environmental protection.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention by way of specific embodiments thereof.
Aiming at the problems of over rich pores, over-vigorous combustion and over-short combustion time of pure fruit wood charcoal used for tea charcoal roasting in the prior art, the invention firstly prepares semi-coke and fruit wood charcoal into mixed charcoal powder, then adopts stamping or spiral extrusion to form a blank body with a preset shape under the action of an adhesive, and dries the blank body to prepare the tea charcoal with uniform size and shape. The scheme has the following technical effects:
firstly, the tea baking charcoal has smaller porosity than pure fruit tree charcoal, so that the problems of overlarge pores, excessive combustion and too short combustion time of the fruit tree charcoal can be solved, slow fire combustion can be achieved in the tea baking process, the baking time is longer, and the tea quality is better.
Secondly, the cost of tea charcoal is reduced, the using amount of fruit charcoal is saved, the development and waste of wood resources are reduced, and the tea charcoal has environmental protection significance.
The semi coke is a solid byproduct obtained by taking weak-viscosity coal and long-flame coal as raw materials, performing dry distillation carbonization at a medium-low temperature (500-. In recent years, the actual yield of the semi coke is about 2500 ten thousand tons/year, and the price of the semi coke is between 650 and 800 yuan. The semi-coke has the characteristics of high fixed carbon, high heat value, high chemical activity, low ash content, low aluminum, low volatile content, low sulfur and low phosphorus, has the characteristic of a certain amount of porosity, can be widely applied to the preparation of energy supply materials and adsorption materials, and is a carbon material with high added value. Therefore, the roasted tea charcoal prepared by doping the fruit charcoal and the semi coke can integrate the common advantages of the two raw materials to a certain extent. The method can save forest resources, reduce tree cutting, clean and utilize the semi-coke which is a byproduct in the coal chemical industry, and reduce the problems of environmental pollution and high energy consumption caused by the emission of the byproduct in the production process of the fruit tree charcoal.
And thirdly, the quality of the tea is improved, and the content of harmful ingredients in the baked tea is reduced. The semi-coke has a certain specific surface area and a microporous structure, can be used for flue gas adsorption, not only has the physical adsorption advantage of charcoal, but also has oxygen-containing functional groups such as carbonyl, hydroxyl and the like on the surface, and is beneficial to the chemical adsorption of the flue gas in the tea baking process. The invention firstly proposes that the semi-coke is used for preparing the roasted tea charcoal for roasting tea leaves, the semi-coke and the fruit tree charcoal are molded to prepare the roasted tea charcoal for roasting the tea leaves, and the detection result shows that the residual harmful ingredients in the tea leaves are lower than that of the pure fruit tree charcoal roasted tea.
The following are preferred examples and comparative examples of the present invention.
Example 1
The embodiment provides a preparation method of roasted tea charcoal for baking tea leaves, which comprises the following steps:
(1) respectively grinding the semi-coke and the fruit wood charcoal, sieving by a sieve of 80 meshes, mixing the sieved carbon powder according to the mass ratio of the semi-coke to the fruit wood charcoal of 1:3, stirring for 60min, adding pre-gelatinized corn starch accounting for 5% of the mass of the carbon powder, stirring and mixing for 30 min, adding water accounting for 30% of the mass of the carbon powder, and continuously mixing and stirring for 40min to be uniform to obtain the mixed carbon paste.
(2) And punching the blank into a cylindrical blank with the diameter of 6cm (8 cm) by using a punching die, and drying to obtain the roasted tea charcoal for baking tea leaves.
The clovershrub herb was baked with the baked tea charcoal and the pure fruit tree charcoal prepared in example 1, respectively. The results show that: (1) compared with the pure fruit tree charcoal baked tea, the tea baked by the baked tea charcoal has the advantages that the water content, the caffeine content and the theanine content in the two tea leaves are similar, and 16 polycyclic aromatic hydrocarbon components such as benzopyrene are not detected. (2) The contents of lead, copper, total arsenic and other heavy metals in tea baked by the baked tea charcoal are lower than those of pure fruit tree charcoal baked tea, which is related to that oxygen-containing functional groups such as carbonyl, hydroxyl and the like on the surface of semi-coke are beneficial to the chemical adsorption of smoke in the tea baking process. (3) As harmful substances, heavy metals (volatile metals) and the like are absorbed by the semi coke, the relative contents of catechin, crude fiber and tea polyphenol in the tea baked by the baking tea charcoal are higher than those of the tea baked by pure fruit tree charcoal. (4) Under the condition that the tea roasting furnace body is filled with the same volume of charcoal, the roasting time of the tea roasting charcoal of the invention is longer than that of pure fruit tree charcoal by 4 days. (5) Every time 1Kg of clovershrub is baked, the cost of charcoal burning can be saved by 50-70 yuan.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A preparation method of roasted tea charcoal for baking tea leaves is characterized by comprising the following steps:
s1, grinding: grinding the semi-coke and the fruit tree coke to obtain mixed carbon powder of the semi-coke and the fruit tree coke with the granularity of 70-100 meshes;
s2, mud making: adding a binder to enable the mass ratio of the binder to the mixed carbon powder to be 1.5-5:50-70, stirring and mixing for 5-60min, adding water accounting for 30-50% of the mass of the mixed carbon powder, and continuously stirring and mixing until the mixture is uniform to obtain mixed carbon pug;
s3, molding: forming by any one of screw extrusion, punching and roll forming, and drying to obtain the roasted tea charcoal.
2. The method of claim 1, wherein in step S1, the semi-coke and the fruit charcoal are ground into charcoal powder respectively and then mixed in proportion, or the semi-coke and the fruit charcoal are blended and ground in proportion to obtain the mixed charcoal powder.
3. The preparation method according to claim 1, wherein in the step S1, the mass ratio of the semi-coke to the fruit charcoal is 1: 1-3.
4. The method according to claim 1, wherein in step S2, the binder is pregelatinized starch, CMC, or dextrin.
5. The method according to claim 4, wherein in step S2, the binder is pregelatinized corn starch.
6. The method of claim 1, wherein in step S3, the mixed carbon paste is formed into a prism-shaped, cylindrical or thumb-shaped blank by screw extrusion; preparing a cylindrical or prismatic blank by adopting a stamping forming mode; and preparing an ellipsoidal, heart-like or pentagram-shaped blank by adopting double-roll forming.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010897384.7A CN111996057A (en) | 2020-08-31 | 2020-08-31 | Preparation method of roasted tea charcoal for tea baking |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010897384.7A CN111996057A (en) | 2020-08-31 | 2020-08-31 | Preparation method of roasted tea charcoal for tea baking |
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| CN111996057A true CN111996057A (en) | 2020-11-27 |
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| CN202010897384.7A Pending CN111996057A (en) | 2020-08-31 | 2020-08-31 | Preparation method of roasted tea charcoal for tea baking |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112538392A (en) * | 2020-12-03 | 2021-03-23 | 陕西煤业星炭能源有限公司 | Smoldering smokeless medium-high temperature ignition charcoal and preparation method thereof |
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| CN102925242A (en) * | 2012-11-29 | 2013-02-13 | 宁夏宝塔石化集团有限公司 | Production method of environment-friendly machine-made charcoal |
| CN105112116A (en) * | 2015-09-18 | 2015-12-02 | 内蒙古励泰生物能源有限责任公司 | Clean barbecue charcoal and preparation method thereof |
| CN209202031U (en) * | 2018-11-07 | 2019-08-06 | 黄锡标 | A kind of full-automatic pure charcoal-baked tea furnace |
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2020
- 2020-08-31 CN CN202010897384.7A patent/CN111996057A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925242A (en) * | 2012-11-29 | 2013-02-13 | 宁夏宝塔石化集团有限公司 | Production method of environment-friendly machine-made charcoal |
| CN105112116A (en) * | 2015-09-18 | 2015-12-02 | 内蒙古励泰生物能源有限责任公司 | Clean barbecue charcoal and preparation method thereof |
| CN209202031U (en) * | 2018-11-07 | 2019-08-06 | 黄锡标 | A kind of full-automatic pure charcoal-baked tea furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112538392A (en) * | 2020-12-03 | 2021-03-23 | 陕西煤业星炭能源有限公司 | Smoldering smokeless medium-high temperature ignition charcoal and preparation method thereof |
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Application publication date: 20201127 |