141 results about "True crabs" patented technology

The invention belongs to the field of feed and is particularly suitable for feeding crabs. The crab feed is mainly characterized in that: (1) various animal and vegetable proteins, starch, trace elements, an auxiliary agent, a feeding promotion agent and the like serving as raw materials are compounded, so that the nutrient contents of the crab feed are more balance and comprehensive, and the requirements of the crabs during different growing periods can be met only by adjusting the ration of relative raw materials in the formula; and (2) the modified plastic processing machinery and process are used, and simultaneously the processes of mixing, shearing, curing, swelling, granulating and the like of the raw materials are also completed. Under the joint action of the two factors, the shapeof the product is stable, the flexibility is adjustable, and the product is not loosened after being soaked in water for several hours, so that the product is in accordance with the feeding habit of the crabs. Because the raw materials comprise fly maggots and earthworms that provide a certain amount of natural antibiotic and immunological factor, the product is insusceptible to decay and deterioration and can improve the disease-resisting capability of the crabs taking the crab feed. The crabs cultivated by the crab feed have the advantages of quick growth, fresh and smooth meat and rich nutrition.

A trap for crabs or lobsters has a mesh extending over a trap frame, with at least one inlet opening provided with a one-way inlet gate spaced apart pins which are pivotable between open and closed positions. Pin retainers prevent spreading of the pins apart from one another when the pins are in the closed position and an undersized crab outlet opening, dimensioned to allow undersized crab or lobsters to escape from the interior chamber, is provided at a side of the trap and at the bottom of the trap. The frame includes an top peripheral frame portion and finger grip openings at the underside of the trap frame. The one-way inlet gate has first and second sets of spaced apart pins, each set being pivotable independently of the other between open and closed positions. Also, the one-way inlet gate has pairs of pins which are pivotable between the open and closed positions, each pair being formed by parallel legs of a U-shaped length of wire, with retainers engaging the legs of each pair to prevent spreading of the legs.

The invention relates to a health maintenance agent for waterweeds in an aquaculture pond of freshwater shrimps and crabs, belonging to the technical field of aquaculture. The health maintenance agent is characterized by comprising the following components in parts by weight; magnesium sulfate, potassium chloride, ferrous sulphate, boric acid and compound sodium nitrophenolate are weighed according to the percentage and uniformly mixed at the normal temperature; the components are uniformly mixed with the monocalcium phosphate, sodium humate, polyaluminum ferric silicate and zeolite powder according to the percentage and finally packaged. The invention is convenient to use and not influenced by the environmental condition and has low dosage; after use, the invention quickly becomes effective, has stable effect, and is capable of quickly improving the growth of the waterweeds in the pond and removing the sludge and attachments on the surfaces of the waterweeds, so that the waterweeds have developed root system, clear surface and dark green color and are healthy and stable. The contents of nitrogen and phosphorus in the pond water are reduced effectively; the environmental quality of the pond is improved; the survival condition of shrimps and crabs is improved, the calcium source of water is supplied reasonably, and the growth and the quality of the shrimps and crabs are improved.

The invention belongs to the technical field of equipment for hairy crab cultivation, and particularly relates to a high-efficiency stirring device for hairy crab bait. The high-efficiency stirring device comprises a stirring tank, wherein the stirring tank comprises an upper stirring tank and a lower stirring tank; the upper stirring tank is internally provided with an upper stirring unit for vertically stirring the bait; the lower stirring tank is internally provided with a lower stirring unit for vertically stirring the bait; and the lower stirring tank is further internally provided with a magnetic rotation unit for pushing the upper stirring unit and the lower stirring unit to perform vertical stirring in a magnetic repulsion manner. According to the device, the magnetic rotation unit, in a rotation process, repels and pushes the upper stirring unit and the lower stirring unit sequentially to accomplish stirring operation in a vertical stirring manner through the magnetic rotation unit, and the device has the advantages of being simple and effective in structure, convenient and quick in stirring operation, good in uniform stirring effect, appropriate in stirring intensity and low in energy consumption.

A method for packing and transporting the young scyllas without dead and erosion includes such steps as providing packing case and sponge, immersing the young scyllas in seawater twice, dripdrying, using seawater to wash rice husk, immersing for 24 hr, dripdrying, freezing for 10 hr, proportionally mixing it with young scyllas, loading the mixture in packing case, and spreading a layer of frozen rice husk.

A technology for unloading the material from ship by grab bucket features that the efficient grab bucket is chosen according to material properties, the grabbing position and method are chosen according to the surficial shape of material stack, and the proper weight of the material to be grabbed is chosen according to calculated weight information for high productivity.

The invention discloses chitin organic fertilizer produced by using livestock excrement and shrimp and crab shells and a preparation method thereof. The chitin organic fertilizer produced by using the livestock excrement and the shrimp and crab shells comprises, by weight percentage, the following raw materials of 65 to 84 % of the livestock excrement, 5 to 15 % of waste of the shrimp and crab shells, 10 to 20 % of straw and 0.5 to 1 % of microbial agent. The chitin organic fertilizer has the advantages that a strong induction effect in the respect of restraining tobacco bacterial wilt is achieved, the tobacco is promoted to generate system resistance under the environmental stress of soil-borne disease, the soil biological activity can be promoted to improve at the same time, the occurrence of the conditions of tobacco vascular bundle deformation and xylem blocking can be reduced to a certain extent, therefore the efficient prevention and control over the tobacco bacterial wilt are achieved, and the problems that the organic fertilizer is slow in taking effect, the effect is not obvious after the fertilizer is applied, and the fertilizer performance is not stable are solved. In addition, the invention further discloses the preparation method of the chitin organic fertilizer.

The invention discloses a crab cleaning machine, which comprises a shell and a transmission mechanism, wherein a water accommodating bucket body is sleeved on the shell to form a bucket body with a cavity structure at the bottom; a motor and a speed reducer of the transmission mechanism are arranged in the cavity; a rotating shaft at the upper end of the speed reducer penetrates through the center at the bottom of the water accommodating bucket body and is connected with an impeller shaft of an impeller at the bottom of a net bucket body in a spliced manner; the impeller shaft is arranged in a through hole in the center of a bearing at the bottom of the net bucket body and is matched with the through hole in a rotatable manner; the net bucket body is arranged in the water accommodating bucket body in an extractable manner; positioning blocks are arranged on two sides of an opening end of the net bucket body and are clamped into positioning slots in two inner sides of the upper opening edge of the water accommodating bucket body; and an ozone generator is arranged in the upper part of the shell. By the crab cleaning machine, the body surface of a crab is flushed by water flow impact wave produced by rotation of the impeller and is subjected to ozone sterilization, so that a plurality of crabs can be cleaned at one time; and the crab cleaning machine is high in speed, high in efficiency, labor-saving and practical.

A method of producing earthworm castings by feeding earthworms with feed prepared by mixing solid fuel ash with shells, crab shells and yellow earth and to an earthworm bed for producing earthworm castings, comprises the steps of: grinding solid fuel ash; washing shells and crab shells to remove salt, and then removing 80% or more of water therefrom; grinding the washed shells and crab shells; mixing 60-70 wt % of yellow earth, 20-30 wt % of the solid fuel ash and 10-20 wt % of the ground shells and crab shells; fermenting and maturing the mixture; and feeding the matured mixture to earthworms to allow the earthworms to produce earthworm castings. The earthworm bed (50) comprises: a feeding unit (52) through which feed prepared by mixing solid fuel ash with shells, crab shells and yellow earth is fed; a breeding chamber (51) in which earthworms are bred to produce earthworm castings; and a discharge unit (53) through which the earthworm castings produced in the breeding chamber (51) are discharged. According to the invention, ash from a solid fuel boiler is used as feed for earthworms to produce earthworm castings, whereby problems associated with the disposal of the solid fuel ash are solved in an environmentally friendly and economical manner. The produced earthworm castings are used as fertilizers, solid amendments and the like.

The invention relates to a method for discriminating Chinese mitten crabs in different producing areas, which is characterized by comprising the following steps of: fishing for the Chinese mitten crabs in different producing areas and then placing in a refrigerator for preservation; after thawing the crabs, taking the third ambulatory legs at the left sides of crab carapaces for element analysis,and then drying the third ambulatory legs in a drying oven to the constant weights; grinding dry samples by using agate mortars for homogenization, and then placing in the drying oven at room temperature; weighing and placing the dry samples into a digestion pipe, and adding concentrated nitric acid to the digestion pipe for digesting the dry samples; transferring the digested samples into a quantitating bottle, and then determining the volume of the samples by using pure water to obtain a solution to be measured; measuring the concentration values of trace elements in the solution to be measured and calculating the corresponding concentration values in the third ambulatory leg dry samples of the Chinese mitten crabs. The analysis method in the invention has reliability and favorable precision, and can effectively discriminate Chinese mitten crab crowds respectively produced in the Jiangsu Yangcheng Lake, the Yong Lake, the Changdang Lake and the Jiangxi Junshan Lake and establish a specific trace element geographical fingerprint library and a discrimination function equation of the Chinese mitten crabs in various areas.

The invention belongs to the field of comprehensive utilization of subsidiary agricultural products, and particularly relates to a method for preparing polypeptide and astaxanthin from shrimp and crab processing waste. The method particularly comprises the steps that the shrimp and crab processing waste serves as a raw material, cleaning and crushing are conducted, acid soaking is conducted, after enzymatic hydrolysis and centrifugation are conducted, supernatant is separated and concentrated through a membrane, and polypeptide is obtained; centrifugal sediments are dried, and astaxanthin is obtained after subcritical extraction and column chromatography isolation. Compared with traditional alkali extraction, the method has the advantages of being high in raw material utilization rate, energy-saving and environmentally-friendly in production process and high in product purity and additional value. By means of the method, comprehensive utilization of the shrimp and crab resource is promoted, the sources of the astaxanthin and polypeptide are enriched, and the positive economic value is achieved.

The invention relates to a method for mixed culturing of swimming crabs and palaemon carinicauda. The method belongs to the technical field of fishery industry and is characterized by comprising the following steps of (1) clearing up a pond; (3) putting swimming crab seedlings in mid-to-end of May, selecting III-period baby crabs cultivated in a soil pool, putting 1-1.5kg per mu, in the end of June, putting 1-2kg of lively-swimming egg-carried shrimps per mu, and planting submerged plant water caltrop in the bottom part of the pond for improving water quality; (4) replacing 70-80 percent of water at every 5-7 days, sterilizing in time after water replacement, and putting water quality modifying agent for one time at the second day; (5) feeding crab and shrimp mixed feed, and then feeding according to the conventional mixed culturing method of the swimming crabs and palaemon carinicauda. According to the method for the mixed culturing of the swimming crabs and the palaemon carinicauda, the nutrition is balanced, the daily demands of the swimming crabs and palaemon carinicauda can be met, the feed efficiency is high, the survival rate of the swimming crabs and palaemon carinicauda is high, the ponderal growth is quick, the immunity of crab bodies can be remarkably enhanced, and the capabilities of antibiosis and antiviral of the crab bodies are improved.

The invention relates to a quantitative determination method for migration speed and a course of Yangtze River Chinese mitten crab parent crabs. The number of sifted parent crabs is 5000-10000. The quantitative determination method for the migration speed and the course of the Yangtze River Chinese mitten crab parent crabs is characterized in that marks are coated on the parent crabs and lantern ring symbols are tied to the parent crabs. On the same day, the parent crabs are released in the river in the region which is overlapped with a migration locus of natural population parent crabs, and the longitude and the latitude of the release point and the time of release are recorded. Three monitoring sections of fixation gill nets are set in the lower course, 4-8 monitoring points are arranged on each monitoring section, the caught marked parent crabs by each monitoring point are checked each day, and the time and the quantity of catching are recorded. From the time that the first marked parent crab is caught, seven times are counted continuously, the migration speed V=S (T1-T2), S is the distance between the release point and the monitoring points, T1 is the time of catching the parent crabs, and T2 is the time of release. The fastest migration speed and the average migration speed are calculated, the quantity of the caught parent crabs of each monitoring point on the three monitoring sections is counted, and the release locus is connected with the monitoring points of catching the parent crabs and the migration course of the parent crabs and the proportion of the parent crabs are obtained.

The invention provides a plastic membrane for preventing cultured crabs escaping and a preparation method thereof. The plastic membrane comprises the components with the following weight portions: 70 to 90 portions of polyolefin base material, 2.5 to 3.5 portions of antioxidant 2, 6 di-butyl-p-cresol, 0.01 to 0.03 portions of isocyanuric three(3,3- di-butyl-4-hydroxy benzyl) ester, 5 to 10 portions of reinforcing agent nano-montmorilonite and 15 to 20 portions of the mixture of terpineol / rough dipentene with the weight ratio of 50:50. The polyolefin base material is preferably 55 to 65 weight portions of liner low density polyethylene and 15 to 25 weight portions of low density polyethylene. As the improvement of the invention, the raw material of the plastic membrane also comprises 10 to 25 weight portions of metallocene catalyst for liner low density polyethylene. With the invention, the plastic membrane has good aging inhibiting effect and better solves the problem that the plastic membrane is easy to age and deteriorate due to sun burning and watering outside for a long time.

In the prior art, during the extraction of chitin in processing of shrimp and crab shells, the use of a large amount of acids and alkalis for removing calcium and proteins can cause serious environmental pollution and the difficult high-value utilization of a large amount of calcium and proteins. A purpose of the present invention is to solve the problems in the prior art. The invention provides amethod for steam explosion cleaning refining polygeneration by using shrimp and crab shells. According to the method, after shrimp and crab shells are subjected to calcium extraction with an organicacid, and treatment is performed with a steam explosion method without the adding of inorganic acids and alkalis, such that the dense structure is destroyed so as to improve the possibility of the subsequent reaction; and the material being subjected to the steam explosion treatment is subjected to solid-state fermentation with proteinase or proteinase-producing microorganisms to further hydrolyzeproteins, such that the shrimp and crab shells are completely separated to obtain organic acids, calcium, proteins and chitin. According to the present invention, the shrimp and crab shells are subjected to steam explosion treatment, such that the influence of the dense structure on the biotransformation is released, the consumption of enzyme or bacteria is reduced, and the reaction time is shortened; the polygeneration of chitin, organic calcium and proteins in the shrimp and crab shells is achieved so as to improve the economic utilization value; and the treatment process avoids the use ofa large number of inorganic acids and alkalis, the process is clean and pollution-free, the process is easy to control, the product is stable, and the method is suitable for industrial production.

The invention discloses a fishery system for carrying out long range fishing operations by utilizing internet of things big data, and relates to an automatic long range fishing system. The fishery system for carrying out long range fishing operations by utilizing internet of things big data comprises a fishing boat; a power generation system, a communication system, a data processing system and afishing system are arranged on the fishing boat; the power generation system is used for providing power for the communication system and the data processing system through power cords; the power generation system comprises a power generator; the power generator is driven and generates power through a host on the fishing boat; the communication system is connected with the data processing system through a data line; the communication system comprises a transmission / reception antenna and a maritime phone, and is capable of accessing to an internet through a satellite; the data processing systemis capable of receiving and transmitting data information; and the data information comprises electronic charts of global sea areas and fishery resource distribution of related sea areas. According to the system provided by the invention, species and distribution conditions of fish schools, shrimps and crabs in each sea area, fishing information of former years and ocean current distribution of each sea area in different seasons can be known.

A semiautomatic mitten crab packaging machine comprises a mitten crab quick packager for packaging mitten crabs. The mitten crab quick packager comprises a middle cheliped part for being buckled to mitten crab cheliped, a left cheliped part for being bucked to left mitten crab cheliped, a right cheliped part for being buckled to right mitten crab cheliped, a machine frame, a mitten crab feeding mechanism, a mitten crab quick packager feeding mechanism, a mitten crab quick packager closing mechanism and a mitten crab quick packager fixing device, wherein the mitten crab feeding mechanism, the mitten crab quick packager feeding mechanism, the mitten crab quick packager closing mechanism and the mitten crab quick packager fixing device are installed on the machine frame; the mitten crab quick packager fixing device is used for containing the mitten crab quick packager; the mitten crab quick packager feeding mechanism is located above the mitten crab feeding mechanism; the mitten crab quick packager closing mechanism is located in front of the mitten crab feeding mechanism; and the mitten crab quick packager fixing device is located in front of the mitten crab quick packager closing mechanism. The semiautomatic mitten crab packaging machine is high in working efficiency, uniform in quality and safe.

Crabs are exposed to water at a temperature of 70-120° F. and a pressure of at least 35,000 psi, thereby denaturing the crab meat protein, allowing for the easy and complete removal of the meat as well as the visceral mass and gonadal materials from the exoskeleton and body cavities of the crabs, and preventing unwanted darkening of the meat. As a result, the quantity and quality of meat recovered from crabs are optimized, as opposed to conventional systems that involve cooking the meat to remove it from the crab.

The invention discloses a method for keeping crabs captured from the sea alive without water. The method comprises the following steps: (1) accumulating and culturing the crabs: bundling large pincers of captured live sea crabs with plastic ropes or rubber strings, and placing the live sea crabs of which the pincers are bundled in seawater added with a live-keeping agent for 1-2 days; (2) cooling and anaesthetizing the live sea crabs in seawater in a classifying manner: firstly placing the live sea crabs which are accumulated and cultured in the seawater of 7-8 DEG C, soaking the live sea crabs in the seawater of 7-8 DEG C for 1-2 minutes, then placing the live sea crabs in the seawater of 1-2 DEG C, and soaking the live sea crabs in the seawater of 1-2 DEG C for 1-2 minutes; (3) packaging the live sea crabs: firstly paving a layer of oxygenates on the bottom of a packaging box, then putting a waterishlogged sponge on the oxygenates, arranging a layer of the live sea crabs on the sponge, then putting another waterishlogged sponge, arranging a layer of the live sea crabs, putting another waterishlogged sponge on the on the oxygenates, filling two layers of swimming crabs altogether in the packaging box, finally sealing the packaging box, and placing the sealed packaging box in the environment of 2-5 DEG C for preservation. The method disclosed by the invention is convenient to operate and low in cost, the survival rate of the crabs captured from the sea can be effectively increased, the survival time of the crabs captured from the sea can be effectively prolonged, the long-distance long-time live-keeping transportation of the crabs captured from the sea is realized in a waterless packaging form, the economic benefits are notable, and the method is suitable for popularization and application.

A kit used for diagnosing reovirus of juyuanqin crab consists of a pair of primer designed according to RNA sequence of a reovirus separated out from ill juyuanqin crab. Its detection method utilizes reverse transcription - polymerase chain reaction technique to carry out qualitative detection on specific RNA nucleic acid section of reovirus on juyuanqin crab.

The prevent invention relates to a simple and quick detectino technique of shrimp-crab intravital blood lymph light microscope, including shrimp and crab living body blood-taking method: cleaning shrimp and crab body, disinfecting by using alcohol, using injector to needle into 7-10 mm of shrimp or crab body to draw blood; blood film preparation and staining method, using 0.05 ml of blood-lymph fluid, dropping on glass slide, adding 4% formaldehyde fixing fluid, drying, staining for 15-20 min. in Giemsa staining solution, washing film with water and making observation by using light microscope, covering with glass plate and making observation by using oil microscope. Said invention adopts meta-acid water flushing scheme to can quickly detect pathogen RLO (Rickettsia-like organism), therefore it possesses high practical value for culturing shrimp and crab.

The invention discloses a method for extracting chitin by comprehensively treating and utilizing shrimp and crab shells. The shrimp and crab shells are decalcified by utilizing glutamic acid and deproteinized by utilizing potassium hydroxide, so that chitin meeting an industrial-grade or food-grade requirement is obtained. According to the method, calcium carbonate in the shrimp and crab shells isfirstly converted into soluble calcium glutamate and is then converted into insoluble calcium hydrophosphate (which can be used as a feed additive) while chitin is extracted, so that the recycle of relatively expensive glutamic acid is realized; and meanwhile, an alkaline protein hydrolysate generated in the deproteinization step and an acidic filtrate containing an ammonium salt and phosphate are concentrated after being mixed to obtain a liquid fertilizer (which can be used as a foliage fertilizer for plant growth) containing amino acid nitrogen, phosphorus and potassium, so that various byproducts are obtained, many things are achieved at one stroke, the clean production of chitin as well as the all-component and high-value comprehensive treatment and utilization of the shrimp and crabshells are realized, no environmental pollution is caused, reaction conditions are appropriate, the problems of resource waste and environmental pollution in a traditional process are solved, and theapplication prospect is wide.

The invention relates to a compound fertilizer, in particular to a disposable special rice fertilizer for a crab raising rice field. The special fertilizer consists of organic fertilizer and inorganic fertilizer in a weight part ratio of 5-7: 3-5, wherein the organic fertilizer comprises 2 to 5 weight parts of livestock and poultry dung and 1 to 2.5 weight parts of humic acid; and the inorganic chemical fertilizer comprises 9 to 11 weight parts of nitrogenous fertilizer, 2 to 4 weight parts of phosphate fertilizer and 3 to 6 weight parts of potassium fertilizer. The yield of the rice is increased obviously after one-time application, any fertilizer does not need to be applied at the later stage, and the special fertilizer does not harm river crabs.

The invention discloses special fertilizer for water plants for a shrimp and crab culture pond. The fertilizer is prepared from raw materials in parts by weight as follows: 5-15 parts of monoammonium phosphate, 10-30 parts of urea, 5-20 parts of poly potassium phosphate, 5-15 parts of bentonite, 2-10 parts of pottery clay, 2-8 parts of zeolite powder, 2-10 parts of borax, 5-12 parts of weathered coal, 1-4 parts of nano calcium carbonate, 10-20 parts of molasses powder, 2-12 parts of fish meal, 5-15 parts of fermented cassava, 2-10 parts of chicken manure, 5-15 parts of honey, 0.5-1.5 parts of EDTA (ethylene diamine tetraacetic acid) chelated manganese, 0.5-1.5 parts of diaminoferric xanthohumate and 1-6 parts of an outer-layer coating agent. The fertilizer is environment-friendly, contains very rich nutritional substances, has the good slow-release effect and can meet requirements of the water plants in the whole growth period through one-time fertilizer application.

The invention relates to a rose planting method, and belongs to the field of flower planting. The method comprises the following steps: selecting a land suitable for planting roses, building a greenhouse, applying a self-made base fertilizer which is prepared by organic fertilizer, phosphatic fertilizer and magnesium fertilizer to the land and arranging furrows, transplanting the rose plants; using a self-made composite organic fertilizer prepared from the self-made organic fertilizer, the phosphate fertilizer, a potash fertilizer and the magnesium fertilizer in winter every year; frequently applying a thin fertilizer in the daily time, spraying a nutrient solution which is prepared by the self-made organic fertilizer, the phosphate fertilizer and the potash fertilizer at a certain time interval, wherein the self-made organic fertilizer is prepared by fermenting rose rot branches, soybean meal, peanut residue, pomelo peel, fish bone, crab shell and human excrement and urine according to specific proportion; finally performing pruning and pest killing. According to the overall planting method provided by the invention, the survival rate of the rose plants is high, diseases and insect pests can be prevented, the fertilizer is saved, the production cost is reduced, the yield of crops per mu is increased, the quality of the obtained roses is good, and the method is suitable for large-scale system reproduction and strong in actual operability.

The invention provides an armour crab seabed exploration and a drilling robot and belongs to the field of prospection devices. A walking device 2 is installed on the lower end of a vehicle body 1. Fixed devices 3 are installed on four corners of the vehicle body 1. A drilling device 4 is installed in the center position of the vehicle body 1. Inspection devices 8 are installed all around the bodyof the vehicle body 1. A hydraulic device 6 is installed in the vehicle body 1. The hydraulic device 6 is connected with the walking device 2, the fixed device and the drilling device 4. The robot issuitable for the sea area with the depth of water of 100m; automatic exploration of hard rock on the seabed can be achieved; drilling and sampling are performed on the seabed; the sampling length is 20m; the exploration cost is reduced; and sea resource development is accelerated.

The invention belongs to the field of micro-optical machine electricity, and specifically relates to an electromagnetic driving galvanometer and a driving magnetic circuit thereof. The driving magnetic circuit comprises a coil and an iron core. The iron core is shaped like a crab claw and comprises an iron yoke part and a stem part. The coil is wound on the stem part. The iron yoke part comprisesa first iron yoke part, a second iron yoke part and an open end, wherein the first iron yoke part, the second iron yoke part and the open end are integrally arranged in order. The first iron yoke partand the stem part are integrally arranged. The cross-sectional areas of the first iron yoke part, the second iron yoke part and the open end vary from large to small. The magnetic field of an electromagnet is concentrated on a permanent magnet to the greatest extent, which has the advantages of less energy loss and high energy utilization.

The invention relates to a technology for extracting chitin from shrimp and crab shells, which belongs to the technical field of chemical industry. The technology improves the prior technology for extracting the chitin from the shrimp and crab shells through a pickling tank and a soda boiling tank and can produce 1000kg of the chitin per day by washing and carrying out aeration in a decalcification kettle, being reacted with dilute hydrochloric acid, carrying out the aeration, adding soda liquid into a soda boiling kettle for heating and aeration, washing, carrying out the aeration and removing protein, ensure that the ignition residue is lower than 1% and fully achieve the requirements on foods and drugs. The technology is mostly used for producing health care products and can improve theutilization rate of acid-soda, be conducive to increasing the output and improving the product quality and be conductive to improving the enterprise efficiency.