65results about How to "Reduce heavy metals" patented technology

The invention provides an environment-friendly antibacterial water paint and a preparation method thereof. The components include deionized water, germicide, assistant for film forming, defoaming agent, wetting agent, dispersant, nanometer TiO2, emulsion or water dispersoid resin, filler, anti-settling agent, flatting agent, thickener, pH regulator, scratch resistance agent or slipping agent, pigment or coloring agent, additive with special function and the like. The preparation method includes the steps of: A. preparing the water dispersoid; B. adding the water dispersoid obtained in the step A into the stirred emulsion, then adding the assistant for film forming, the flatting agent, the thickener, the anti-settling agent, and the pH regulator and uniformly stirring and dispersing the components; C. adding the pigment or the coloring agent; and D. charging water and adjusting the Stormer viscosity at the temperature of 25 DEG C to be 65-90KU, thus obtaining the water paint. The water paint provided in the invention has good adhesion to wood materials, full paint films with certain hardness, low VOC, no heavy metal, and the antibacterial and mildewproof functions, and belongs to the environment-friendly and safe children woodwork water paint.

The invention relates to freely-blended instant substitutional tea and a making method thereof. The substitutional tea is composed of one or more natural plant essences. A making method of the natural plant essences includes the following steps that S1, effective portions of natural plants are smashed to be 60-200 mesh, and water is added for soaking; S2, material liquid obtained in S1 is subjected to homogeneous wall-breaking extraction at the temperature of 30-55 DEG C, filtering for impurity removal is carried out, and filtrate is obtained for use; S3, the filtrate obtained in S2 is subjected to filtering separation sequentially through a micro-filtration membrane, an ultrafiltration membrane and a nanofiltration membrane, and effective ingredient enriched products are obtained; S4, the enriched products obtained in S3 are subjected to vacuum drying and smashed to be 50-100 mesh, and the natural plant essences are obtained. Each single plant of traditional substitutional tea is extracted into an instant powder product, the size of the products is effectively reduced, the products are conveniently carried by a customer, and the customer can freely blend the products according to the taste and health maintenance requirement of the customer.

An adsorbent composition of a carrier coated with nanoparticles of zerovalent iron (“NZVI”) is disclosed. The NZVI are synthesized in situ using a tannin extract. Methods of making the adsorbent composition comprise providing a liquid stream; dispersing iron salts in the liquid stream to form an iron salt solution; adding a carrier to the iron salt solution to form a prepared stream; adding a tannin extract to the prepared stream to form a reaction stream; and forming the adsorbent composition in the reaction stream. Methods of reducing toxic metal ions in an aqueous stream are also disclosed. The methods comprise providing said aqueous stream; providing an adsorbent composition having a carrier coated with in situ nanoparticles of zerovalent iron (“NZVI”) therein; and contacting the aqueous stream with the adsorbent composition.

The invention relates to an ecological planting method of panax notoginseng and belongs to the technical field of planting of traditional Chinese medicinal materials. The method comprises specific steps as follows: land selection and preparation; ditching and plot arrangement; planting of panax notoginseng; piling and shed building; net and film covering; field management (including film uncovering for germination, weed removal, irrigation and drainage, shade frame adjustment, removal of flower buds, fertilization, disease and pest prevention and control as well as stalk cutting for passing of the winter); digging of the panax notoginseng. The method is based on the bionic cultivation principle of the traditional Chinese medicinal materials, physiological and biological characteristics of the panax notoginseng are combined, the ecological environment suitable for growth and development of the panax notoginseng is created, the resistance of the panax notoginseng is enhanced through agricultural comprehensive prevention and control measures, field diseases and pests are reduced, high-quality and green panax notoginseng is produced, and the method is simple and easy to implement, conforms to the development direction of ecological planting of medicinal plants at home and abroad and is a technological revolution in cultivation of the panax notoginseng.

The invention discloses a multifunctional bio-organic fertilizer and a preparation method thereof, and relates to the technical field of agricultural fertilizers. The multifunctional bio-organic fertilizer is prepared from the following raw materials in parts by weight: 40-60 parts of forestry and agricultural residues, 10-16 parts of active humic acid, 5-15 parts of degreased tea-seed pancake, 0.5-1.5 parts of expanded vermiculite, 0.2-0.8 part of abscisic acid, 0.2-0.8 part of zymophyte, 0.2-0.8 part of beneficial bacterium, 0.2-0.8 part of degrading bacteria, 5-9 parts of urea, 8-12 parts of calcium magnesium phosphate fertilizer, 4-8 parts of potassium sulfate, and 0.5-1.5 parts of medium and trace element. The multifunctional bio-organic fertilizer has the characteristics that the nutritional elements for plant growing are contained; the organic substances are rich; in addition, the contaminated oil can be remediated; the soil structure can be activated; the multifunctional bio-organic fertilizer is applicable to the planting of crops such as rice of southern China, vegetables, watermelon, tobacco, fresh ginger, rape and tea, fruits such as naval orange, grapefruit and pear, garden nursery stock and flowers.

The invention discloses a wood-vinegar-containing biological compound fertilizer. The biological compound fertilizer is mainly prepared from the following raw materials in parts by weight: 10-15 parts of microbial inoculant, 20-30 parts of urea, 5-10 parts of diammonium phosphate, 10-20 parts of potassium chloride, 4-8 parts of calcium magnesia phosphate fertilizer, 10-15 parts of biochar, 1-3 parts of nano titanium dioxide, 0.5-1.5 parts of zinc sulfate, 0.2-1 part of copper sulfate and 2-5 parts of wood vinegar. The biological compound fertilizer is capable of enhancing the utilization ratio of the fertilizer, saving the raw materials and increasing the crop yield, and is also capable of supplying comprehensive nutrients required by crop growth, regulating plant growth and development, killing and resisting bacteria, expelling pests, effectively lowering the disease and pest morbidity and reducing the pesticide use.

The invention discloses a municipal solid waste heat accumulating type gasification and melting incineration system comprising a gasification and melting incinerator; the gasification and melting incinerator comprises a high-temperature air inlet and a high-temperature smoke outlet; the high-temperature smoke outlet is connected with the inlet of a high-temperature cyclone dust collector; the outlet of the high-temperature cyclone dust collector is divided into two paths, wherein one path is connected with the smoke side inlet of a first high-temperature air heat accumulating device and the other path is connected with the smoke side inlet of an exhaust-heat boiler; the smoke side outlet of the exhaust-heat boiler is connected with the smoke side inlet of a second high-temperature air heat accumulating device; the smoke side outlet of the second high-temperature air heat accumulating device and the smoke side outlet of the first high-temperature air heat accumulating device are combined into a whole and are connected with a bag type dust collector, a draught fan, a desulfurizing tower and a chimney in sequence. A heat accumulating type high-temperature air burning technology and a gasification and melting incineration technology are combined, and two sets of high-temperature air heat accumulating devices sufficiently absorb burning heat, and thereby, auxiliary fuel consumption is low, and the content of heavy metals and dioxins in ash smoke is low.

The invention discloses an electrolytic manganese residue harmless treatment and resource utilization method. The electrolytic manganese residue harmless treatment and resource utilization method comprises the steps that firstly, a calcium oxide additive and a calcium carbonate additive are added into leaching liquid, and impurities such as iron, magnesium and calcium in the leaching liquid are effectively removed; secondly, the pH value of the leaching liquid is regulated through sodium hydroxide, sodium carbonate is added to react, and thus a manganese carbonate product is obtained; and finally, by adding calcium oxide, high-concentration ammonia nitrogen in filtrate is removed in an air stripping mode, escaping gas is absorbed through clear water, and the filtrate is reused. According to the electrolytic manganese residue harmless treatment and resource utilization method, the contents of heavy metal and the ammonia nitrogen in electrolytic manganese residues are effectively decreased, the manganese and ammonia nitrogen leaching time is shortened, and the leaching rates of manganese and the ammonia nitrogen in the electrolytic manganese residues are increased; and manganese in the leaching liquid is mainly recycled as manganese carbonate, a product can be directly used as electrolytic manganese residue raw materials, and in addition, the leaching liquid after a stripping reaction can be recycled.

The process of treating heavy metals in sludge includes pre-treatment and post-treatment, and the post-treatment includes a pyrolysis step, a spraying and aerating step, a dewatering step, a neutralizing and dewatering step, an ammonia fixing step and a fertilizer producing step. The neutralizing and dewatering step includes adding organic extractant into liquid from the pyrolysis step and the dewatering step until generating no precipitate, filtering, dewatering the filtered liquid to water content lower than 40 %, and feeding the concentrated liquid to the ammonia fixing step. Compared with available technology, the present invention has the advantage of selecting proper efficient extractant for desorbing heavy metals to produce harmless fertilizer.

The present invention relates to a silkworm cocoon shell containing tea containing products, tea substitute drinks, or traditional Chinese medicine drink tablets, and a preparation method and use thereof. The present invention uses the following specific methods: one sides of silkworm cocoons or wild silkworm cocoons are cut open with knives, silkworm chrysalises are moved out, or silkworm cocoons with naturally moths flying away are selected; the silkworm cocoon shells are oven-dried and sterilized, the tea containing products, tea substitute drinks, or traditional Chinese medicine drink tablets are filled into the silkworm cocoons and pressed tightly; the openings of the silkworm cocoon shells are sutured with threads and a number of small holes are drilled on the surface of the silkworm cocoons with a special drill, and thereby the finished product. The prepared silkworm cocoon shells having adsorption functions and containing tea containing products, tea substitute drinks, or traditional Chinese medicine drink tablets can effectively reduce the contents of heavy metals and pesticide residues in the water decoction and better protect public health.

The invention provides a preparation method of producing high-quality Anhua fu brick tea, and discloses a technology system and a standard method of producing the high-quality Anhua fu brick tea. The preparation method of producing the high-quality Anhua fu brick tea can effectively control the quality of the Anhua fu brick tea so as to ensure that produced Anhua fu brick tea is flourishing in bloom, and accords with a quality standard system which is low in pesticide residue, fluorine and heavy metal and high in amino acid content.

The invention discloses an environment-friendly processing method of agricultural class-A sludge biochar fertilizer, which includes: precipitating and concentrating dilute sludge from a domestic wastewater treatment plant to obtain concentrated sludge with water content of 95-96%; dewatering the concentrated sludge under high pressure to obtain dewatered sludge with water content of 48-52%, addingcertain humic acid, and mixing and drying with a double-shaft forced sludge stirrer to obtain semi-dried mixed sludge with water content of 23-38%; using an environment-friendly rotary sludge drier to heat and dry the semi-dried mixed sludge with water content of 23-38%; using an environment-friendly rotary sludge carbonizer to heat and carbonize the crushed dried sludge with water content of 7-10%; using a biochar humidifier to humidify sludge biochar, and mixing well to obtain the agricultural class-A sludge biochar fertilizer. The invention also discloses an environment-friendly processingsystem of agricultural class-A sludge biochar fertilizer, and an environment-friendly rotary sludge dryer used therein. Sludge treatment herein is environmentally friendly, economical and efficient.

The invention discloses a composite chemical leaching method for remediation of heavy metal contaminated soil. The method includes: leaching heavy metal contaminated soil 1-3 times by a composite leacheate prepared from ferric chloride and an organic acid, then further conducting leaching 1-3 time with distilled water, and finally separating the leacheate from soil. The method provided in the invention has the advantages of good treatment effect, short leaching time, no secondary pollution, simple operation, relative low cost, a highest cadmium removal rate of over 80%, and a highest lead removal rate of over 55%. The iron-containing compound involved in the invention is used as an improver of paddy soil. The residue of ferric chloride has a positive effect on chemical properties of soil, and cannot destroy the soil structure. The used organic acid is easy to degrade, and the degradation product can become nutrients of plants and is environment-friendly. The final leaching by water can reduce the content of metal ions and the leacheate residue in the remedied soil, thus being in favor of later crop tilling.

The invention discloses a method for producing a ferric trichloride solution through industrial automatic control. The method comprises the following steps of S1, pumping waste hydrochloric acid, generated after steel pickling, into a plate-and-frame filter press through a sealed pipeline, and filtering; S2, feeding filtered waste hydrochloric acid and excessive scrap iron into a reaction tank, and carrying out replacement reaction; S3, adding a ferrous chloride solution subjected to replacement reaction in the step S2 and quantitative scrap iron into a filler absorption tower, and feeding chlorine for carrying out chlorination reaction; S4, filtering the solution subjected to reaction in the step S3, thus obtaining the ferric trichloride solution. The method for producing the ferric trichloride solution through industrial automatic control, provided by the invention, has the advantages that an automatic chlorine feeding method is directly used, so that the method has the advantages oflow production pollution, simple operation, and benefit to reducing direct contact of people and chemical raw materials, has a role in protecting workers and an environment, is a promising hazardouswaste treatment process, and helps to solve troubles of a steel pickling industry.

A method for reducing heavy metals, in particular in mercury, present in flue gases, includes the step of bringing the flue gases into contact with a particular class of sorbent material in the dry state. A preferred class of dry sorbent materials can be provided from a mineral compound selected from among halloysites and phyllosilicates of the palygorskite subgroup and the sepiolite subgroup of the palygorskite-sepiolite group according to the Dana classification. Mineral compounds of this group have been shown to provide a reduction in heavy metals, in particular in mercury, present in flue gases.

The invention relates to the field of wastewater treatment, and particularly discloses a method for recovering ammonia nitrogen in livestock and poultry breeding wastewater. An exchanger and an ammonia nitrogen analysis solution in step c), step d) and step e) in the method can sufficiently recover most of ammonia nitrogen in the livestock and poultry breeding wastewater, and the ammonia nitrogen recovered in the exchanger and the ammonia nitrogen analysis solution can be produced into products as needed, such as ammonium chloride, ammonium sulfate and the like, and can also be used as a nitrogen source for fermentation of agricultural straws. Moreover, after most of the ammonia nitrogen in the livestock and poultry breeding wastewater is recovered, a ratio of C / N in the livestock and poultry breeding wastewater is increased, so as to facilitate biochemical treatment of the livestock and poultry breeding wastewater in a later period, so that the treatment cost of the livestock and poultry breeding wastewater can be effectively reduced. The scheme can reduce the recovery cost of the ammonia nitrogen in the livestock and poultry breeding wastewater.

The invention provides a soil conditioner. The soil conditioner comprises: 30-40% by weight of modified diatomite, 30-40% by weight of calcium salt, 10-20% by weight of humic acid, 5-10% by weight ofmagnesium salt, 2-5% by weight of ammonium molybdate, 3-10% by weight of boric acid and 10-20% by weight of composite microbial agent, wherein the composite microbial agent contains 2*10<8>-1*10<9> cuf / g of composite microbial bacteria, and the composite microbial bacteria contain bacillus cereus, bacillus subtilis, trichoderma and phosphate solubilizing bacteria. The invention also provides a preparation method and application of the soil conditioner. The soil conditioner disclosed by the invention can be used for remarkably reducing the content of heavy metals in soil and increasing the yield.

The invention belongs to the technical field of agriculture, and particularly relates to a biochar-based fertilizer as well as a preparation method and an application thereof. The invention provides the biochar-based fertilizer. The biochar-based fertilizer comprises biochar, urea, calcium superphosphate, potassium chloride, magnesium sulfate, a soil conditioner and clay minerals. The invention further discloses the preparation method of the biochar-based fertilizer, which comprises the following steps: step 1, mixing biochar, urea, calcium superphosphate, potassium chloride, magnesium sulfateand a soil conditioner, and sequentially drying and crushing to obtain a mixture; and step 2, mixing the mixture with clay minerals, and granulating to obtain the biochar-based fertilizer. The invention provides the application of the biochar-based fertilizer in treatment of acidified soil and improvement of crop yield and vitamin C content. The invention provides the biochar-based fertilizer which can treat polluted soil and is suitable for crops, and the technical defects that an existing biochar-based fertilizer is single in function and cannot be suitable for various crops and soil improvement are overcome.

The invention relates to a UV (Ultraviolet) curable coating as well as a preparation method and application thereof. The UV curable coating is prepared from the following components in percentage by weight: 30 to 40 percent of high-functionality polyurethane acrylate, 10 to 20 percent of trifunctional polyurethane acrylate, 10 to 20 percent of bifunctional polyurethane acrylate, 3 to 5 percent of trimethylolpropane triacrylate, 2 to 4 percent of photosensitizer and 10 to 15 percent of solvent. The UV curable coating disclosed by the invention is sprayed on the surface of single-fluid type colored paint, is used for glazing the single-fluid type colored paint surface, and can form a layer of tough coating film on the single-fluid type colored paint surface; the UV curable coating has the characteristics of good adhesion, good flexibility and good bending resistance for the single-fluid type colored paint and has no influence on the single-fluid type colored paint; a product is enabled not to be easy to bend and burst in the use process.

The invention belongs to the field of agricultural means of production, and particularly relates to a plant source humic acid long-acting slow-release urea fertilizer and a production process thereof.The plant source humic acid long-acting slow-release urea fertilizer is prepared from plant source humic acid urea; the plant source humic acid urea is suitable for the reactive synthesis of plant source humic acid and urea, the content of humic acid and fulvic acid in the plant source humic acid urea is improved, and the long-acting slow-release effect of the urea fertilizer is improved, meanwhile, the content of heavy metals and impurities in urea fertilizer can be further reduced, and the use effect is improved.

The invention discloses a steam fungus bag cultivation method of black fungi. The method includes the steps that orange peel, radix angelicae dahuricae and wheat bran are crushed to obtain a crushed material; fructus momordicae extracts, pearl powder, wormcast and lotus leaf powder are mixed to be uniform, milk and tree sap are added, the mixture is boiled, a first mixture is obtained, water and the crushed material are added to the first mixture, the mixture is stirred to be uniform, a second mixture is obtained, then vacuum concentration is conducted, and a culture medium is obtained; the culture medium is put into a fungus bag, holes are formed in the side face and the bottom face of the fungus bag in a pierced mode, the culture medium accounts for 3 / 5 the internal space of the fungus bag, and a layer of pretreated sweet wormwood herbs is laid on the upper surface of the culture medium in the fungus bag; in the bacterium-free environment where the temperature is 25 DEG C, the black fungus strain is put into the fungus bag in an inoculation mode, the surface of the fungus bag is covered with a layer of nonwoven cloth soaked with lime water, and cultivation is conducted in a dark environment. The steam fungus bag cultivation method has the advantages of being rapid, the yield is high, the heavy metal content is low, and quality is high.

The invention provides a wet-method zinc oxide preparation method comprising the steps that: (1) a mixed oxide comprising zinc element is subjected to acid leaching, a substitution reaction, an oxidation reaction, and salting-out, such that a salting-out solution and zinc salt are obtained; (b) the zinc salt is subjected to thermal decomposition, such that zinc oxide is obtained; and (c) other product obtained by thermal decomposition in the step (b) except zinc oxide are prepared into a mother liquor with the salting-out solution obtained by the salting-out process in the step (a), and the operation of the step (a) is repeated. With the method provided by the invention, the zinc oxide purity is high, and circular preparation can be realized. No neutralization agent is needed, such that cost is reduced, and a process is simple.

The invention discloses a municipal solid waste heat accumulating type gasification and melting incineration system comprising a gasification and melting incinerator; the gasification and melting incinerator comprises a high-temperature air inlet and a high-temperature smoke outlet; the high-temperature smoke outlet is connected with the inlet of a high-temperature cyclone dust collector; the outlet of the high-temperature cyclone dust collector is divided into two paths, wherein one path is connected with the smoke side inlet of a first high-temperature air heat accumulating device and the other path is connected with the smoke side inlet of an exhaust-heat boiler; the smoke side outlet of the exhaust-heat boiler is connected with the smoke side inlet of a second high-temperature air heat accumulating device; the smoke side outlet of the second high-temperature air heat accumulating device and the smoke side outlet of the first high-temperature air heat accumulating device are combined into a whole and are connected with a bag type dust collector, a draught fan, a desulfurizing tower and a chimney in sequence. A heat accumulating type high-temperature air burning technology and agasification and melting incineration technology are combined, and two sets of high-temperature air heat accumulating devices sufficiently absorb burning heat, and thereby, auxiliary fuel consumptionis low, and the content of heavy metals and dioxins in ash smoke is low.

The invention discloses standard quantitative-matching instant green tea and a preparation method thereof. The instant green tea comprises 62 to 68 percent of tea polyphenol enrichment, 5 to 7 percent of caffeine enrichment, 22 to 26 percent of tea polysaccharide enrichment and 10 to 15 percent of other beneficial ingredients. By determining the quantity of beneficial ingredients in excellent green tea after the beneficial ingredients are separated and extracted, the proportional situation of ingredients in the excellent green tea can be obtained, and then an ordinary tealeaf raw material is separated and extracted according to the same way and is quantificationally matched according to the proportion so as to obtain the instant green tea having similar characteristics to the excellent green tea. Through the method, the ordinary green tealeaves can be prepared into the instant green tea having characteristics which are similar to that of the excellent green tea through a quantitative matching way, so the production cost can be reduced, and a high economic and practical value can be realized. The instant green tea has the advantages of standardization, fixed ingredients, low residue of heavy metal and farm chemicals and the like. The preparation method of the instant green tea is easy to realize the industrialized mass production.

The invention provides an ecological organic fertilizer containing a nano-humus soil organic conditioning agent. The ecological organic fertilizer has functions of pollution control, water retention, drought resistance and comprehensive nutrient supplement. The ecological organic fertilizer comprises 1 to 20 parts of a conditioner, 20 to 90 parts of fermented animal feces, 5 to 70 parts of grass soil and 1 to 5 parts of a formalin aqueous solution with a concentration of 0.15%. Through use of the nano-humus soil organic conditioning agent, the ecological organic fertilizer greatly reduces heavy metal content of crops after the application, preserves soil moisture for a long time, can give comprehensive nutrients for crops, improves the soil, realizes crop luxuriant foliage, prevents pests and diseases, and greatly improves agricultural product quality and yield.

The invention relates to a fertilizer combined application method for improving the yield and quality of radix curcumae longae. On the basis of base fertilizer application, the following fertilizers are applied in proportion: 16.11-22.64 kg of nitrogen fertilizer, 67.96-92.04 kg of phosphorus fertilizer, 12.35-22.48 kg of potassium fertilizer and 35.82-53.24 kg of organic fertilizer in each 667 m<2> of cultivated land. By adopting the fertilizer combined application method, the obtained radix curcumae longae is high in yield and good in quality, wherein the yield per mu of the radix curcumae longae is 120 kg or above, the total ash content of the radix curcumae longae is lower than 9%, and meets the total ash content index of the medicinal material radix curcumae longae specified by the 2015 edition of Chinese pharmacopoeia, the content of extract is greater than 20%, and the content of curcumin is greater than 0.08%. The fertilizer combined application method is applied in productionpractice, the yield can be improved, and furthermore, the contents of the extract and the curcumin can be improved, and the fertilizer combined application method is a combined application method withrelatively high safety.

The invention discloses a water storage irrigation system of ecological safety type resistant starch rice. The water storage irrigation system comprises a water storage pool and an irrigation canal; awater inlet pipe and a water outlet pipe are arranged on the water storage pool, and a first volcanic rock layer is laid at the bottom of the water storage pool; and one end of the irrigation canal is communicated with the water outlet pipe of the water storage pool, and the other end of the irrigation canal extends to a rice planting field. The invention also discloses a growth method of the ecological safety type resistant starch rice. The growth method is based on the water storage irrigation system and comprises the following steps of irrigating and immersing planting land soil for threedays by using irrigation water of the water storage pool; conducting water draining, and drying the field for five days; conducting soil preparation, and adding a soil remediation agent and an organicfertilizer into the soil, wherein 50%-70% of the soil remediation agent and the organic fertilizer are kept between 15 cm and 25 cm on the surface layer of the soil, and the rest 30%-50% of the soilremediation agent and the organic fertilizer are kept between 0 cm and 15 cm on the surface layer of the soil; transplanting resistant starch rice seedlings into the soil; and applying tillering fertilizer after the resistant starch rice seedlings are transplanted for 5-7 days. According to the growth method of the ecological safety type resistant starch rice, pesticide residue heavy metal is reduced, and the method is environmentally friendly and safe.

The invention belongs to the technical field of agricultural fertilizer, and more specifically relates to a soil improvement agent, and a preparation method thereof. The soil improvement agent comprises following raw materials, by weight, straw powder, walnut shell powder, decomposed sawdust, modified cyclodextrin, and seconary alkane sulphonate sodium. The soil improvement agent is simple in composition, and abundant in nutrients, is capable of improving the acidity of acid soil effectively, reducing crop aluminium poisoning risk, promoting absorption and utilization of crops on nutrients, and increasing fertilizer utilization rate.

The invention discloses a method for freeze-drying radix salvia miltiorrhiza, and belongs to the technical field of traditional Chinese medicinal material processing. The method comprises the following steps of, removing soil and fibrous roots from harvested fresh radix salviae miltiorrhizae, washing the radix salviae miltiorrhizae, slicing the radix salviae miltiorrhizae until the thickness is 2-3mm, pre-freezing the radix salviae miltiorrhizae for 3-6 hours at the temperature of-20 to-5 DEG C, putting the radix salviae miltiorrhizae into a freeze dryer, setting the vacuum degree to be 5-100Pa, controlling the temperature from -65 - -30 DEG C to 40-50 DEG C, and carrying out staged vacuum drying treatment to obtain the freeze-dried radix salviae miltiorrhizae. The method can retain the effective components and curative effects of traditional Chinese medicinal materials to the greatest extent, avoids the defects of large workload, long period, low drying efficiency, high labor cost and the like of a traditional drying method, and can directly reduce the labor cost.

The invention belongs to the technical field of extraction and purification of plant effective components, and discloses a pomegranate peel extracting solution heavy metal treatment and punicalagin purification method. The method comprises the following steps of preparing a pomegranate peel extracting solution by using continuous countercurrent extraction equipment, adsorbing the pomegranate peel extracting solution by using a heavy metal special adsorbent, separating punicalagin in the pomegranate peel extracting solution through column chromatography, decolorizing with activated carbon, and purifying with acetone to obtain the punicalagin. The punicalagin is extracted in a continuous countercurrent extraction mode, and heavy metals in the pomegranate peel extracting solution are adsorbed in combination with the special heavy metal adsorbent, so that the limitation of selection of high-quality pomegranate peel raw materials is broken through, the prepared punicalagin is high in content, the heavy metals meet the use requirements of food addition and cosmetics, the method provides data support for producing punicalagin products by large flat-turn extraction equipment, is simple and feasible in process, adopts purified water for extraction and separation, and is suitable for industrial production.