Preparation method of novel bamboo salt with improved process

Abstract

The invention provides a process-improved novel bamboo salt preparation method which comprises the following steps: firstly, mixing crude salt and bamboo ash, and putting the mixture into a high-temperature smelting furnace for melting and calcining to remove heavy metals, so as to obtain reinforced enriched high-temperature calcined bamboo salt; and mixing the crude salt with the strengthened and enriched high-temperature calcined bamboo salt to adjust the water content, compactly loading into a bamboo tube, sealing, and baking to obtain the strengthened and enriched novel bamboo salt. The raw salt and the bamboo ash are mixed and melted to prepare reinforced enrichment type high-temperature calcined bamboo salt powder, then the reinforced enrichment type high-temperature calcined bamboo salt powder is added into the raw salt in a solid or liquid mode to be baked, non-water-soluble mineral substance melting and water-soluble mineral substance melting are superposed, and trace elements in bamboo materials and salt are efficiently fused, so that the content of water in the bamboo materials is increased, and the quality of the bamboo materials is improved. The penetration of mineral substances in the bamboo tube into the salt column is increased by assisting the modes of puncturing the inner wall of the bamboo tube and chamfering the upper end surface, the alkalinity and mineral content of the once-baked bamboo salt can reach the traditional multiple baking level, the bamboo salt quality is remarkably improved, the baking frequency and the production time are reduced, the production efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of bamboo salt, and in particular relates to a method for preparing a novel bamboo salt with improved process. Background Art

[0002] Bamboo salt originated from Taoist alchemy and was used to prevent and treat infectious diseases such as smallpox and malaria. It has the effect of detoxification and elimination. Bamboo salt is widely used in temples. In recent years, it has been spread to the people and has been widely popularized, especially in Japan and South Korea. Bamboo salt directly participates in human metabolism and can play a role in penetrating detoxification and regulating acidic constitution. Existing literature shows that bamboo salt has good preventive and therapeutic effects on inflammation, respiratory infectious diseases, diabetes, gastrointestinal diseases, blood circulation disorders and tumors. It also has good relief and conditioning for sub-health in modern lifestyles. Bamboo salt is also an excellent seasoning salt. In addition, it is widely used in snacks, beauty makeup, daily cleaning, etc. At present, Jiukao Bamboo Salt Solid Drink is added with ginger powder, selenium-rich mushroom powder, etc., and is directly brewed as a sub-health conditioning for intestinal detoxification, three highs, etc.

[0003] The current production method of bamboo salt has the following shortcomings:

[0004] 1. Bamboo salt is still a niche product, mainly produced in workshops, with low output, high prices, and difficult to control product quality.

[0005] 2. It requires long-term repeated high-temperature heating to increase the quality of bamboo salt by baking times. From bamboo cutting-filling-high-temperature calcination, baking once takes 2 to 3 days, and nine baking bamboo salts need about a month of continuous operation. The traditional production model of the workshop is time-consuming and labor-intensive, and it is difficult to achieve large-scale production. It has low production efficiency, high energy consumption, and high cost.

[0006] 3. The traditional method of preparing bamboo salt is to roast pine wood and melt calcinate with rosin. This is an extensive production method with a low degree of mechanization and the inability to accurately control process parameters. The quality stability of bamboo salt is poor and the product is difficult to standardize.

[0007] 4. The yield of bamboo salt is low, and the salt column strength is insufficient, which causes the salt to scatter or local high temperature during the production process, leading to the volatilization of sodium chloride and beneficial mineral elements. The yield of nine-roasted bamboo salt is very low, which greatly wastes raw materials and increases the production cost of bamboo salt. At present, the pure nine-roasted bamboo salt on the market is expensive. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a method for preparing a new type of bamboo salt with improved process in view of the deficiencies of the above-mentioned prior art. The key process of the preparation method is controllable, the energy consumption is low, and the production efficiency is high. The quality of the prepared new type of bamboo salt is close to that of the traditional nine-roasted bamboo salt, and the number of roasting times is greatly reduced.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for preparing a new type of bamboo salt with improved process, characterized in that the method comprises:

[0010] S1. Mix the raw salt and bamboo ash in a mass ratio of 10:1-10, place in a high-temperature furnace, heat to 800-850°C and keep warm for 0.5h-2h to melt, then continue to heat to 1000-1200°C, calcine to remove heavy metals, and finally cool and crystallize before crushing to obtain enhanced enrichment type high-temperature calcined bamboo salt powder; the bamboo ash is the inorganic matter remaining after burning the bamboo raw material;

[0011] S2, mixing the raw salt with the enhanced enriched high temperature calcined bamboo salt powder obtained in S1 at a mass ratio of 10:0.2-2, and adding water during the mixing process to obtain a mixed salt with a moisture content of 5-15%, and then densely packing the mixed salt into a bamboo tube with a moisture content of 10-100%, and sealing the top of the bamboo tube with yellow mud, and baking the mixed salt in the bamboo tube to obtain enhanced enriched bamboo salt;

[0012] S3. Place the enhanced enriched bamboo salt obtained in S2 in a high temperature furnace and keep it at 1000-1200° C. for 1 hour for melting treatment to obtain a new type of bamboo salt.

[0013] Preferably, the bamboo ash described in S1 is the inorganic matter remaining from the combustion of bamboo raw materials, and the specific preparation process is: the bamboo raw materials or firewood fuel are burned in the furnace, and the light ash floating out from the upper part of the furnace cavity is collected by a net and used as bamboo ash; or, the gray or black ash burned from the bamboo raw materials is calcined at above 800°C to grayish-white bamboo ash that does not contain organic matter.

[0014] Preferably, the inner wall of the bamboo tube in S2 is punctured with a pricking roller, the puncturing depth is 1-8 mm without penetrating the bamboo tube wall, and the hole spacing is 5-30 mm.

[0015] Preferably, the upper end surface of the bamboo tube in S2 is milled with an inner inclination angle, and the angle between the inclined surface and the outer wall of the bamboo tube is 60-30°.

[0016] Preferably, bamboo ash or wood ash is added to the yellow mud in S2. The bamboo ash or wood ash should be completely burned without organic matter and chemical pollution. The added amount is 0.1-0.3 of the mass of the yellow mud.

[0017] Preferably, the enhanced enriched high temperature calcined bamboo salt solution in S2 can be first dissolved in water and filtered to obtain the enhanced enriched high temperature calcined bamboo salt solution, and then mixed with the raw salt to obtain a mixed salt with a water content of 5-15%.

[0018] Preferably, step S2 can be repeated multiple times, wherein the bamboo salt obtained after the last roasting is used as the raw salt and is mixed with the enhanced enriched high-temperature calcined bamboo salt obtained in S1 in proportion, and the bamboo salt obtained from the last roasting is melt-treated in S3 to finally obtain a new type of multi-roasted bamboo salt.

[0019] Preferably, the fuel used for roasting in S2 is fuel processed from pine wood, miscellaneous wood or bamboo raw materials.

[0020] Preferably, the method for processing the bamboo raw material into fuel is: crushing the bamboo raw material to obtain bamboo crushed material, drying it to a moisture content of 5-15%, and then pressing it into a hollow rod A as a biomass fuel, and further processing the hollow rod A into bamboo charcoal; adding pine leaf powder and rosin or natural rosin to the bamboo crushed material, pressing it into a hollow rod C, and using the hollow rod C as an enhanced biomass fuel;

[0021] The mixed salt in S2 is densely filled into the bamboo tube, and then the baking process is specifically as follows: the bamboo tube filled with the mixed salt is baked at low temperature for 0.5-2h using bamboo charcoal to make the bamboo tube lose water and carbonize, and then the enhanced biomass fuel is used to bake until the bamboo tube burns, and then the bamboo biomass fuel or bamboo charcoal is used to continue baking for 1-3h to form a dense salt column, and the bamboo salt column is crushed to obtain a baked enhanced enriched bamboo salt.

[0022] Preferably, the inner diameter of the bamboo tube in S2 is 6-20 cm and the length is 10-100 cm, and only the bottommost bamboo node is retained.

[0023] Preferably, the baking time in S2 is generally 1-5 hours, depending on the amount of bamboo tubes baked each time, the water content of the bamboo tubes and salt, the choice of fuel and other factors. Carefully observe the condition of the salt column during the baking process, and end the baking when the bamboo tubes are burned out and the salt column is formed or extend the time for a certain period of time.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. The present invention first directly melts the inorganic matter remaining after burning the raw salt and bamboo raw materials, namely bamboo ash, at high temperature, and utilizes the chlorination metallurgy technology to volatilize and quickly remove the heavy metals in the salt or ash in the form of low-boiling chlorides in a high-temperature molten state. Putting the removal of heavy metals and organic pollutants at the front end can reduce the melting time of the enhanced enriched bamboo salt, reduce the volatilization of beneficial minerals brought by the baking of bamboo salt, improve the quality and yield of bamboo salt, and increase the content of potassium, magnesium, iron, zinc and calcium, especially the content of potassium and calcium.

[0026] 2. The present invention mixes and melts raw salt and bamboo ash to form an enhanced enriched high-temperature calcined bamboo salt powder, which is then added to the raw salt for baking. The melting and baking are superimposed, and the minerals in the bamboo ash are highly integrated with the salt, thereby realizing a rapid melting channel for the minerals in the bamboo material and the bamboo salt, thereby improving the quality of the bamboo salt, reducing the number of baking times and production time, improving production efficiency, and reducing costs.

[0027] 3. Since the liquid-conducting tissues inside the internodes of the bamboo stalks are arranged in parallel along the longitudinal direction and lack transverse conductive tissues, the bamboo nodes have transverse tissues, while the upper part of the bamboo tube containing salt has no bamboo nodes. During the heating process, a large part of the liquid in the bamboo material carries minerals and is enriched along the upper end of the bamboo tube, and is volatilized or ashed and lost during the baking process. Moreover, the inner wall of the bamboo is composed of dense, silicon-rich bamboo yellow, which has poor air permeability and water permeability. Based on this, the present invention provides a fast channel for the penetration of the liquid in the bamboo tube into the internal salt by piercing the inner wall of the bamboo tube and milling the inner bevel of the upper end face of the inner wall, improving the traditional bamboo tube baking process due to the lack of transverse conductive groups and hard inner walls. During the rapid heating process, the bamboo liquid directly migrates upward through the longitudinally connected vascular bundles, causing the minerals to be enriched and ashed at the upper end of the bamboo tube (without entering the bamboo salt) and causing bamboo juice loss, and significantly increasing the penetration of soluble mineral elements in the bamboo material into the salt column.

[0028] 4. The enhanced enriched bamboo salt after baking in the present invention is melt-treated to effectively remove heavy metals and organic pollutants in bamboo ash and raw salt, reduce the volatilization of elemental substances such as sodium chloride, and improve the yield of bamboo salt.

[0029] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a picture of the upper end surface of the bamboo tube being processed into a flat edge and an inner chamfered surface.

[0031] Figure 2 Combustion picture of the hollow rod C in Example 4 of the present invention at the later stage of baking. DETAILED DESCRIPTION

[0032] Example 1

[0033] This embodiment discloses a method for preparing a novel bamboo salt with improved process, the method comprising:

[0034] S1. Mix raw salt and bamboo ash in a mass ratio of 10:5, place in a high-temperature furnace, heat to 830°C and keep warm for 1.5 hours to melt, then heat to 1100°C, calcine to remove heavy metals, and finally cool and crystallize before crushing to obtain enhanced enriched high-temperature calcined bamboo salt powder;

[0035] S2, mixing the raw salt with the enhanced enriched high-temperature calcined bamboo salt powder obtained in S1 at a mass ratio of 10:1, and adding water during the mixing process to obtain a mixed salt with a moisture content of 10%, and then densely packing the mixed salt into a bamboo tube with a moisture content of 60%, and sealing the top of the bamboo tube with yellow mud, baking the mixed salt in the bamboo tube for about 2 hours to obtain a salt column, and crushing to obtain enhanced enriched bamboo salt;

[0036] S3. The enhanced enriched bamboo salt obtained in S2 is placed in a high temperature furnace and kept warm for 1 hour at 1100° C. for melting treatment to obtain a new type of bamboo salt.

[0037] In this embodiment, the bamboo tube in S2 has an inner diameter of 6-20 cm and a length of 10-100 cm. It is made from freshly cut bamboo. The bamboo tube contains at least one bamboo node, and only the bottom bamboo node is retained, and the other bamboo nodes are removed.

[0038] In this embodiment, the bamboo ash described in S1 is the inorganic matter remaining after the combustion of bamboo raw materials, and the specific preparation process is: the bamboo raw materials are burned into ash, and calcined at above 800°C to become grayish-white bamboo ash that does not contain organic matter; the bamboo raw materials can be any part of bamboo that is not contaminated by heavy metals and does not contain soil, such as bamboo leaves, bamboo shells, bamboo roots, bamboo branches, bamboo stalks, and can also be the residues after felled bamboos are processed into bamboo tubes.

[0039] In this embodiment, the fuel used in baking in S2 is pine wood; pine wood ash is added to the yellow mud in S2, and the amount of pine wood ash added is 0.2 of the mass of the yellow mud. The pine wood ash can come from the ash left after baking using pine wood as fuel during the baking process.

[0040] In this embodiment, the raw salt is sun-dried sea salt.

[0041] In this embodiment, the high temperature furnace is a heating device that can heat up quickly, with a heating rate of 10-15°C / min, a maximum temperature of not less than 1400°C, and no heavy metals and other harmful substances are released during the heating process. The high temperature furnace is a muffle furnace, a medium frequency furnace, a high frequency furnace, a tubular furnace, but is not limited to the above heating equipment.

[0042] In this embodiment, the composition of the bamboo ash used in S1 and the composition of the enhanced enriched high-temperature calcined bamboo salt powder obtained by mixing with raw salt and calcining at high temperature are shown in Table 1.

[0043] Table 1 Index values ​​of bamboo ash and mineral element contents

[0044]

[0045] From the data in Table 1, it can be seen that the bamboo ash used in S1 contains high concentrations of mineral elements such as potassium, calcium, and zinc, and heavy metal residues also exist, and the aqueous solution is alkaline. After adding salt and calcining, the minerals are enriched in the salt, the alkalinity of the aqueous solution increases, and the heavy metals are basically volatilized. This is because the heavy metals in the bamboo ash and raw salt are rapidly removed by volatilization in the form of low-boiling chlorides under high-temperature melting conditions using chlorination metallurgy technology. In this embodiment, the removal of heavy metals and organic pollutants is placed at the beginning of the preparation method, which can reduce the time for the subsequent enhanced enrichment bamboo salt melting in S3. This is because the content of beneficial minerals decreases with the increase of temperature and time during melting. Therefore, the heavy metals in the bamboo ash are first removed in S1, which saves time for the subsequent melting in S3 to prevent excessive volatilization of beneficial minerals, improve the quality and yield of bamboo salt, and the obtained new bamboo salt has a high content of potassium, magnesium, iron, zinc, and calcium, especially magnesium and potassium.

[0046] Example 2

[0047] The preparation method of this embodiment is the same as that of Embodiment 1, except that: the inner wall of the bamboo tube described in S2 is punctured with a pricking roller, the puncture depth is 5 mm, the spacing is 15 mm, the upper end surface of the bamboo tube is milled with an inner inclination angle, and the angle between the inclined surface and the outer wall of the bamboo tube is 45°.

[0048] Figure 1 The upper end of the bamboo tube is processed into a flat mouth (such as Figure 1 (a)) and the inner tilt angle (as shown in Figure 1 As shown in the picture (b), compared with the conventional method in which the upper end surface of the bamboo tube is flat, the use of an inner inclined angle surface can enable part of the liquid (containing minerals) in the salt and the bamboo tube to flow into the bamboo tube along the inner wall after being heated during the baking process, thereby fully moistening the salt and increasing the mineral content and strength of the salt column.

[0049] The composition data of the bamboo salt prepared in Examples 1 and 2 are shown in Table 2.

[0050] Table 2 Bamboo salt ingredients prepared in Examples 1 and 2

[0051]

[0052]

[0053] The traditional nine-baked bamboo salt is purchased from the market. The data in Table 2 show that the minerals such as potassium, calcium, magnesium, iron, zinc and pH value of the enhanced enriched bamboo salt obtained in S2 of Example 1 are higher than those of the traditional nine-baked bamboo salt. After high-temperature calcination in S3 of Example 1, the minerals such as potassium, calcium, magnesium, iron, zinc and pH value are reduced, and the heavy metals are basically volatilized. Under the same conditions, the mineral content of the new bamboo salt obtained in S3 of Example 2 after permeability enhancement treatment such as puncturing the bamboo tube wall is better than that of the new bamboo salt obtained in S3 of Example 1 where the bamboo tube is not treated. This shows that the present invention provides a fast channel for the penetration of the liquid in the bamboo tube to the internal salt by puncturing the inner wall of the bamboo tube and milling the inner bevel of the upper end face of the inner wall, improves the loss caused by the direct upward migration of the bamboo liquid through the longitudinally connected vascular bundles during the rapid heating process, and significantly increases the penetration of soluble mineral elements in the bamboo into the salt column.

[0054] Example 3

[0055] This embodiment discloses a method for preparing a novel bamboo salt with improved process, the method comprising:

[0056] S1. Mix the raw salt and bamboo ash in a mass ratio of 10:1, place in a high-temperature furnace, heat to 800°C and keep warm for 2 hours to melt, then continue to heat to 1200°C, calcine to remove heavy metals, and finally cool and crystallize before crushing to obtain enhanced enrichment high-temperature calcined bamboo salt powder;

[0057] The raw salt and the enhanced enriched high-temperature calcined bamboo salt powder obtained in S1 are mixed in a mass ratio of 10:0.2, and water is added during the mixing process to obtain a mixed salt with a moisture content of 5%, and then the mixed salt is densely packed into a bamboo tube with a moisture content of 10%, and the top of the bamboo tube is sealed with yellow mud, and the mixed salt packed in the bamboo tube is baked for about 1 hour to obtain a salt column, which is crushed to obtain the enhanced enriched bamboo salt;

[0058] S3. The enhanced enriched bamboo salt obtained in S2 is placed in a high temperature furnace and kept at 1000° C. for 1 hour for melting treatment to obtain a new type of bamboo salt.

[0059] In this embodiment, the bamboo ash described in S1 is the inorganic matter remaining from the combustion of bamboo raw materials, and the specific preparation process is: the bamboo raw materials and charcoal are burned in a furnace, and the light ash floating out from the upper part of the furnace cavity is collected by a net and used as bamboo ash; the bamboo raw materials can be any part of bamboo that is not contaminated by heavy metals and does not contain soil, such as bamboo leaves, bamboo shells, bamboo roots, bamboo branches, bamboo stalks, and can also be the residues after felled bamboos are processed into bamboo tubes.

[0060] In this embodiment, the inner wall of the bamboo tube described in S2 is punctured with a pricking roller, the puncture depth is 2 mm, the spacing is 5 mm, and the upper end surface of the bamboo tube is milled with an inner inclination angle, and the angle between the inclined surface and the outer wall of the bamboo tube is 60°.

[0061] In this embodiment, the bamboo tube in S2 has an inner diameter of 6-20 cm and a length of 10-100 cm. It is made from freshly cut bamboo. The bamboo tube contains at least one bamboo node, and only the bottom bamboo node is retained, and the other bamboo nodes are removed.

[0062] In this embodiment, the enhanced enriched high temperature calcined bamboo salt powder in S2 can be first dissolved in water and filtered to obtain an enhanced enriched high temperature calcined bamboo salt liquid, and then mixed with the raw salt to obtain a mixed salt with a moisture content of 5-15%.

[0063] In this embodiment, the raw salt is sun-dried sea salt.

[0064] In this embodiment, the high-temperature furnace is a heating device that can heat up quickly, with a heating rate of 5°C / min, a maximum temperature of not less than 1500°C, and no heavy metals and other harmful substances are released during the heating process. The high-temperature furnace is a muffle furnace, a medium frequency furnace, a high frequency furnace, or a tubular furnace, but is not limited to the above heating equipment.

[0065] In this embodiment, step S2 can be repeated twice, wherein the bamboo salt obtained after the last roasting is used as the raw salt and is mixed with the enhanced enriched high-temperature calcined bamboo salt powder obtained in S1 in proportion, and the bamboo salt obtained in the last roasting is melt-treated in S3 to obtain a new type of multi-roasted bamboo salt.

[0066] In this embodiment, the raw material used for baking in S2 is miscellaneous wood; miscellaneous wood ash is added to the yellow mud, and the amount of miscellaneous wood ash added is 0.1 of the mass of the yellow mud. The miscellaneous wood ash can be the miscellaneous wood ash baked using miscellaneous wood as fuel during the baking process.

[0067] In this embodiment, the prepared new bamboo salt is off-white in color and is configured into a 0.9% saline solution with a pH of 9.86. Its physical and chemical properties and heavy metal content meet national standards. The content of mineral elements such as potassium, calcium, magnesium, iron, and zinc is higher than that of bamboo salt roasted by traditional methods.

[0068] Example 4

[0069] This embodiment discloses a method for preparing a novel bamboo salt with improved process, the method comprising:

[0070] S1. Mix raw salt and bamboo ash in a mass ratio of 10:10, place in a high-temperature furnace, heat to 850°C and keep warm for 0.5h to melt, then heat to 1000°C, calcine to remove heavy metals, and finally cool and crystallize before crushing to obtain enhanced enriched high-temperature calcined bamboo salt powder;

[0071] S2. Dissolve the enhanced enriched high-temperature calcined bamboo salt powder obtained in S1 in water and filter it to obtain an enhanced enriched high-temperature calcined bamboo salt liquid, and then mix it with the raw salt to obtain a mixed salt with a moisture content of 15%. This method can reduce the acid-insoluble content in the product. The mass ratio of raw salt to enhanced enriched high-temperature calcined bamboo salt powder in the mixed salt is 10:2, and then the mixed salt is densely packed into a bamboo tube with a moisture content of about 100%, and the top of the bamboo tube is sealed with yellow mud, and the mixed salt in the bamboo tube is baked to obtain enhanced enriched bamboo salt;

[0072] S3. The enhanced enriched bamboo salt obtained in S2 is placed in a high temperature furnace and kept warm for 1 hour at 1100° C. for melting treatment to obtain a new type of bamboo salt.

[0073] In this embodiment, the raw salt in S1 is sun-dried sea salt, and the bamboo ash is the inorganic matter remaining from the combustion of bamboo raw materials. The specific preparation process is: the bamboo raw materials are burned into ash, and calcined at above 800° C. to obtain grayish white bamboo ash without organic matter.

[0074] In this embodiment, the inner wall of the bamboo tube described in S2 is punctured with a pricking roller, the puncture depth is 8 mm, and the hole spacing is 30 mm. The upper end surface of the bamboo tube described in S2 is milled with an inner inclination angle, and the angle between the inclined surface and the outer wall of the bamboo tube is 30°.

[0075] In this embodiment, the bamboo tube in S2 has an inner diameter of 10-20 cm and a length of 10-60 cm. It is made from freshly cut bamboo. The bamboo tube contains at least one bamboo node, and only the bottom bamboo node is retained, and the other bamboo nodes are removed.

[0076] In this embodiment, the high temperature furnace is a muffle furnace.

[0077] In this embodiment, step S2 can be repeated multiple times, preferably 1-2 times, wherein the bamboo salt obtained after the last roasting is used as the raw salt and is mixed with the enhanced enriched high-temperature calcined bamboo salt powder obtained in S1 in proportion, and the bamboo salt obtained in the last roasting is melt-treated in S3 to obtain a new type of multi-roasted bamboo salt.

[0078] In this embodiment, the fuel used for roasting in S2 is a fuel processed from bamboo raw materials, and the method for processing the bamboo raw materials into fuel is: crushing the bamboo raw materials to obtain bamboo crushed materials, drying to a moisture content of 15%, or 5%, 10%, 12%, etc., and then pressing them into hollow rods A as biomass fuel, and further processing the hollow rods A into bamboo charcoal; adding pine needle powder and rosin or natural rosin to the bamboo crushed materials, and pressing them into hollow rods C as enhanced biomass fuel;

[0079] The mixed salt in S2 is densely filled into the bamboo tube, and then the baking process is specifically as follows: the bamboo tube filled with the mixed salt is baked at a low temperature for 1.2 hours (0.5 hours, 1 hour, 2 hours can also be selected) using a bamboo charcoal making machine to make the bamboo tube lose water and carbonize, and then the enhanced biomass fuel is used to bake until the bamboo tube burns. Figure 2 As shown, bamboo biomass fuel or bamboo charcoal is used to continue baking for 2 hours (1 hour, 1.5 hours, 2.5 hours, and 3 hours can also be selected) to form a dense salt column, and the bamboo salt column is crushed to obtain a baked enhanced enriched bamboo salt.

[0080] In this embodiment, the bamboo raw material can be any part of bamboo that is free of heavy metal pollution and does not contain soil, such as bamboo leaves, bamboo shells, bamboo roots, bamboo branches, and bamboo stalks, or the residues after felled bamboo is processed into bamboo tubes. Using bamboo raw materials to process into fuel or prepare bamboo ash is conducive to recycling the remaining bamboo leaves, bamboo roots, bamboo branches, bamboo stalks, etc. after felled bamboo is processed into bamboo tubes, which is environmentally friendly and waste utilization.

[0081] In this embodiment, bamboo ash is added to the yellow mud in S2, and the amount of bamboo ash added is 0.3 of the mass of the yellow mud; the bamboo ash can be the bamboo ash processed from bamboo raw materials during the baking process and baked as fuel.

[0082] In this embodiment, the prepared new bamboo salt is off-white in color and is configured into a 0.9% saline solution with a pH of 10.69. Its physical and chemical properties and heavy metal content meet national standards. The content of mineral elements such as potassium, calcium, magnesium, iron, and zinc is higher than that of bamboo salt roasted by traditional methods.

[0083] Example 5

[0084] This embodiment discloses a method for preparing a novel bamboo salt with improved process, the method comprising:

[0085] S1. Mix raw salt and bamboo ash in a mass ratio of 10:8, place in a high-temperature furnace, heat to 850°C and keep warm for 1 hour to melt, then heat to 1150°C, calcine to remove heavy metals, and finally cool and crystallize before crushing to obtain enhanced enriched high-temperature calcined bamboo salt powder;

[0086] S2, mixing the raw salt with the enhanced enriched high-temperature calcined bamboo salt powder obtained in S1 at a mass ratio of 10:1.5, and adding water during the mixing process to obtain a mixed salt with a moisture content of 15%, and then densely packing the mixed salt into a bamboo tube with a moisture content of 60%, and sealing the top of the bamboo tube with yellow mud, and baking the mixed salt in the bamboo tube for about 2 hours to obtain enhanced enriched bamboo salt;

[0087] S3. The enhanced enriched bamboo salt obtained in S2 is placed in a high temperature furnace and kept warm for 1 hour at 1100° C. for melting treatment to obtain a new type of bamboo salt.

[0088] In this embodiment, the bamboo ash described in S1 is the inorganic matter remaining after the combustion of bamboo raw materials, and the specific preparation process is: the bamboo raw materials are burned into ash, and calcined at above 800°C to become grayish-white bamboo ash that does not contain organic matter; the bamboo raw materials can be any part of bamboo that is not contaminated by heavy metals and does not contain soil, such as bamboo leaves, bamboo shells, bamboo roots, bamboo branches, bamboo stalks, and can also be the residues after felled bamboos are processed into bamboo tubes.

[0089] In this embodiment, the fuel used for baking in S2 is pine wood, and pine ash is added to the yellow mud, and the amount of pine ash added is 0.2 of the mass of the yellow mud; the wood ash can be the pine ash baked using pine wood as fuel during the baking process.

[0090] In this embodiment, the bamboo tube in S2 has an inner diameter of 10-20 cm and a length of 50-100 cm. It is made from freshly cut bamboo. The bamboo tube contains at least one bamboo node, and only the bottom bamboo node is retained, and the other bamboo nodes are removed.

[0091] In this embodiment, the raw salt is sun-dried sea salt.

[0092] In this embodiment, the high temperature melting furnace is a tubular furnace.

[0093] The new bamboo salt prepared in this embodiment is off-white in color and is configured into a 0.9% saline solution with a pH of 10.48. Its physical and chemical properties and heavy metal content meet national standards. The content of mineral elements such as potassium, calcium, magnesium, iron, and zinc is higher than that of bamboo salt roasted by traditional methods.

[0094] The water used in the above embodiments is edible water, such as purified water, mineral water, well water, etc., preferably, mineral water.

[0095] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent change made to the above embodiment according to the technical essence of the invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A method for preparing a novel bamboo salt with improved process, characterized in that: The method is: S1. Mix the raw salt and bamboo ash in a mass ratio of 10:1-10, place in a high-temperature furnace, heat to 800-850°C and keep warm for 0.5h-2h to melt, then continue to heat to 1000-1200°C, calcine to remove heavy metals, and finally cool and crystallize before crushing to obtain enhanced enrichment type high-temperature calcined bamboo salt powder; the bamboo ash is the inorganic matter remaining after burning the bamboo raw material; S2, mixing the raw salt with the enhanced enriched high temperature calcined bamboo salt powder obtained in S1 at a mass ratio of 10:0.2-2, and adding water during the mixing process to obtain a mixed salt with a moisture content of 5-15%, and then densely packing the mixed salt into a bamboo tube with a moisture content of 10-100%, and sealing the top of the bamboo tube with yellow mud, and baking the mixed salt in the bamboo tube to obtain enhanced enriched bamboo salt; S3. Place the enhanced enriched bamboo salt obtained in S2 in a high temperature furnace and keep it at 1000-1200° C. for 1 hour for melting treatment to obtain a new type of bamboo salt.

2. The method for preparing a novel bamboo salt with improved process according to claim 1, characterized in that: The bamboo ash described in S1 is the inorganic matter remaining after the combustion of bamboo raw materials. The specific preparation process is: the bamboo raw materials are burned in a furnace, and the light ash floating out of the upper part of the furnace cavity is collected by a net and used as bamboo ash; or, the bamboo raw materials are burned into ash, and calcined at above 800°C to obtain gray-white bamboo ash that does not contain organic matter.

3. The method for preparing a novel bamboo salt with improved process according to claim 1, characterized in that: The inner wall of the bamboo tube in S2 is punctured with a pricking roller, the puncture depth is 1-8 mm, the bamboo tube wall is not penetrated, and the hole spacing is 5-30 mm.

4. The method for preparing a novel bamboo salt with improved process according to claim 1, characterized in that: The upper end surface of the bamboo tube in S2 is milled with an inner inclination angle, and the angle between the inclined surface and the outer wall of the bamboo tube is 30°-60°.

5. The method for preparing a novel bamboo salt with improved process according to claim 1, characterized in that: Bamboo ash or wood ash is added to the yellow mud in S2, and the bamboo ash or wood ash has no chemical pollution and does not contain organic matter. The added amount is 0.1-0.3 of the mass of the yellow mud.

6. The method for preparing a novel bamboo salt with improved process according to claim 1, characterized in that: The enhanced enriched high temperature calcined bamboo salt powder in S2 can also be dissolved and filtered in water to obtain enhanced enriched high temperature calcined bamboo salt liquid, and then mixed with raw salt to obtain mixed salt with a water content of 5-15%.

7. A method for preparing a novel bamboo salt with improved process according to any one of claims 1 to 6, characterized in that: Step S2 can be repeated multiple times, wherein the bamboo salt obtained after the last roasting is used as the raw salt and is mixed with the enhanced enriched high-temperature calcined bamboo salt obtained in S1 in proportion, and the bamboo salt obtained from the last roasting is melted in S3 to finally obtain a new type of multi-roasted bamboo salt.

8. The method for preparing a novel bamboo salt with improved process according to claim 1, characterized in that: The fuel used for roasting in S2 is fuel processed from pine wood, miscellaneous wood or bamboo raw materials.

9. The method for preparing a novel bamboo salt with improved process according to claim 7, characterized in that: The method for processing the bamboo raw material into fuel comprises: crushing the bamboo raw material to obtain bamboo crushed material, drying it to a moisture content of 5-15%, and then pressing it into a hollow rod A as a biomass fuel, and further processing the hollow rod A into bamboo charcoal; adding pine leaf powder and rosin or natural rosin to the bamboo crushed material, and pressing it into a hollow rod C as an enhanced biomass fuel; when using a bamboo fuel without chemical additives and pollution to burn, the ash generated can be used as the bamboo ash raw material of S1. The mixed salt in S2 is densely filled into the bamboo tube, and then the baking process is specifically as follows: the bamboo tube filled with the mixed salt is baked at low temperature for 0.5-2h using bamboo charcoal to allow the moisture in the bamboo tube to fully diffuse into the salt column, and at the same time the bamboo tube wall loses water and carbonizes, and then enhanced biomass fuel is used to bake until the bamboo tube burns, and then bamboo biomass fuel or bamboo charcoal is used to continue baking for 1-3h to form a dense salt column, and the bamboo salt column is crushed to obtain a baked enhanced enriched bamboo salt.

10. The method for preparing a novel bamboo salt with improved process according to claim 1, characterized in that: The inner diameter of the bamboo tube in S2 is 6-20 cm and the length is 10-100 cm, and only the bottom bamboo node is retained.

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