118 results about "Material cycle" patented technology

The invention relates to a spinel nickel manganese acid lithium and layered lithium-rich manganese-based composite cathode material with a core-shell structure and a preparation method thereof, which belongs to the technical field of material synthesis. The prepared lithium ion composite cathode material takes a layered lithium-rich manganese-based Li[Lia(NixCoyMnz)]O2 as a core material, takes spinel nickel manganese acid lithium LiNi0.5Mn1.5O4 as a shell material; a coprecipitation method is employed to obtain a core-shell precursor, the core-shell precursor and the lithium source are uniformly mixed and calcined to obtain the spinel nickel manganese acid lithium and layered lithium-rich manganese-based composite cathode material with the core-shell structure. According to the invention, the layered lithium-rich manganese-based is taken as the core material, and the spinel nickel manganese acid lithium is taken as the shell material; under the prerequisite that material gram capacity is kept, material structural stability is increased, material cycle, multiplying power and safety performances are improved, function composite and complementation of the core material and the shell layer material can be realized, and the problem that high capacity and high security can not be achieved simultaneously is solved. The composite cathode material has the advantages of simple process and obviously increased performance.

The invention discloses a functional bioorganic fertilizer and a semi-organic fertilizer and a preparation method thereof. The method comprises the following steps of: adding microzyme into livestock manure to perform anaerobic and aerobic fermentation; deodorizing, drying and crushing (after biogas slurry of residues after fermentation in a methane tank is separated, the biogas dregs are dried and crushed); adding a certain amount of humic acid, amino acid, borax, ammonium molybdate and zinc sulfate, or also adding nitrogen, phosphor and kalium inorganic nutrients; automatically blending materials by using a computer according to a proportion; after uniformly stirring, granulating by using a granulator, and drying, cooling and screening the grains; and coating a synergist and nitrogen-fixing, phosphorous-dissolving and potassium-releasing composite bacteria on qualified grains to prepare the functional bioorganic and semi-organic fertilizers. The product has the functions of preserving moisture and fertility, resisting drought, coldness, plant diseases and insect pests and the like, improves the soil structure, promoting the proliferation of beneficial microorganisms in soil, jointly participating substance circulation of a soil ecosystem and the like, has quick response and long effect, is mainly used as a base fertilizer for crops to save time and manpower, can realize waste recycling, protects ecological environment, integrates land utilization, land nourishment and land protection, and ensures constant soil productivity.

The invention relates to a high-capacity graphite material and a preparation method as well as application thereof. The high-capacity graphite material comprises artificial graphite and natural graphite, wherein the mass ratio of artificial graphite to natural graphite is 20:1 to 1:1. According to the preparation method, the artificial graphite and the natural graphite are uniformly mixed according to a certain mass ratio, and then surface modification is carried out on the mixture. The prepared graphite material has the advantages of high discharge capacity, high first efficiency, long cycle life, low cost and the like; the discharge capacity of the high-capacity graphite material can reach up to more than 350mAh / g (even reach up to more than 368mAh / g); a half-cell of the high-capacity graphite material charges and discharges at the 1C multiple power; after the high-capacity graphite material cycles for 100 times, the capacity retention ratio of the high-capacity graphite material is still more than 90% (even reaches up to more than 96.3%); the first efficiency reaches up to more than 95.5%; and the manufacturing cost is reduced by about 1-10%. The high-capacity graphite material provided by the invention not only can meet the requirement of a lithium ion power battery for the high multiplying power charge-discharge of the material, but also reduces the manufacturing cost of the cathode material of the lithium ion battery.

The invention discloses a method for preparing alkali sulphide by using sulfur dye waste gas, which is characterized in that the sulfur dye waste gas containing hydrogen sulfide is used as a raw material and added with alkali to perform reaction at the reaction temperature of between 60 and 85 DEG C, the reaction products are cooled to between 30 and 50 DEG C after the reaction reaches a final point, and the reaction products are filtered to form the alkali sulphide. The alkali added into the sulfur dye waste gas containing the hydrogen sulfide may be one or a mixture of more than two of sodium hydroxide, potassium hydroxide, sodium carbonate, sodium bicarbonate and potassium carbonate, and the ratio of the adding amount of the alkali to the weight of the waste gas is (0.8-1.4): 1. The pressure in the reaction process is -0.12 to -0.06MPa. The alkali sulphide is sodium sulphide and potassium sulfide. The method changes waste into valuable, effectively solves the problem that the sulfurdye waste gas is difficult to treat, reduces the discharge concentration of hydrogen sulfide in the waste gas, achieves the aims of environmental protection, energy conservation and discharge reduction, substance recycle and clean production, has large economic benefit and social benefit, and has the advantages of effectively reducing environment pollution and having less energy consumption.

The invention discloses a method for removing the pollutants in liquor and a system thereof. The method is to add a magnetic substance and a coagulant in the inlet water, and floccus is formed by stirring and mixing; after deposition, according to the proportion difference of different components in the deposit, a hydraulic power swirl separation method is adopted for separating the magnetic substances with high proportion in the deposit, and the left components are discharged as sludge; then the separated magnetic substances are recycled. The system finished according to the above method at least comprises a mixing tank and a deposition tank, and the lower outlet of the deposition tank is communicated with a hydraulic power swirl separation mechanism which can separate the magnetic substances from the deposit. The invention has simple process, can be operated easily, can improve the recovery rate of magnetic loading medium and lower the cost, therefore excellent operation effect of water treatment can be obtained, and market competitiveness can be improved.

The invention belongs to the technical field of recycling of resources, and in particular relates to a method for biologically purifying marsh gas and recycling waste of the marsh gas. The method comprises the following steps of: purifying carbon dioxide in the marsh gas by using a photo-bioreactor constructed by algae to obtain high-quality biomass energy methane; simultaneously, combining fermented liquid and residues which are residual after fermentation, and comprehensively recycling the algae proliferated in the photo-bioreactor to fulfill the aim of zero emission of the waste. By the method, the marsh gas has an obvious purification effect, the concentration of the methane in the marsh gas can be improved from the range of between 30 and 40 percent to 90 percent, the energy flow of solar energy from the algae to high-quality marsh gas and the matter cycle of nutrient elements such as C, N, P and the like are realized, and economic and social benefits are obvious.

The invention relates to a gasification system of an oxygen-enriched biomass circulating fluidized-bed. Biomass is fed from the middle-lower part of a gasification furnace, oxygen-enriched air preheated by a preheater and overheated water steam are fed from the bottom of the gasification furnace, the biomass is rapidly fluidized under the assistant action of a bed material to generate pyrolysis and gasification reactions, generated high-temperature fuel gas is subjected to gas-solid separation by using a cyclone separator, carbon residues in the fuel gas and the bed material are fed to the gasification furnace from the lower part of the gasification furnace by a material return device to continuously react, and the high-temperature fuel gas passes through a cyclone dust collector, a superheater, a waste heat boiler and the preheater in sequence and is then separated from the system. According to the gasification system, the volume fraction as well as the dust and tar concentration in the fuel gas can be effectively reduced, the heat value of the fuel gas is increased, and the high-quality clean fuel gas is obtained.

The invention relates to a preparation method for a LiLSX molecular sieve, which comprises the steps that LSX zeolite is prepared, LSX is exchanged into KLSX, K2SO3 solution is adopted and KOH solution is used for regulating the PH value to 8.5, a method of displacing for a plurality of times is used with 2 minutes of replacing time for each replacement and the temperature of the solution is about 80 DEG C, exchange liquid after being exchanged a plurality times is used in the next group of the exchange process of K<+>; then a method that is similar to the replacement of K<+> solution is adopted to exchange into NH4LSX, the PH value of the solution is 8.5; then LiOH solution is used for exchanging Li<+> into LiLSX at the temperature of 50 DEG C and air is added to discharging NH3 at the same time; finally, washing, drying, etc. are carried out and finished products are obtained. The method is characterized by adopting ion exchange in a short time, using substances exchanged circularly and having suitable temperature and PH values of exchange solutions and high utilization ratio of Li, and finally the LiLSX molecular sieve with high degree of crystallinity is obtained.

The present invention provides a circulating fluidized bed boiler furnace having heated screen, the heated screen is set between the furnace grid plate and the ceiling which height is identical to the furnace, the heated screen is made of membrane panel, membrane panel pipe has working substance un-down, the upper of the heated screen is vertical, the lower has space connected the front and the back screen formed by pipe; the heated screen is one or more plates. The circulating fluidized bed boiler furnace having heated screen gives space to the material cycle when the furnace provides extending heated surface, ensuring the uniformity of the material concentration, temperature and heat transfer; secondary air inlets in the center of the furnace, fullu burning, and has lower NOx drainage.

The present invention discloses a city domestic rubbish anaerobic schizolysis gasification processing apparatus and technical skill thereof, wherein the apparatus is composed by a rubbish storage hopper, a converting kiln, a compressor, an organic matter converting kiln and a sewage disposal system etc. The technical skill includes no exogenous source low energy consumption dispose and system secondary pollution control technique etc. Technical problems like system oxygen exhaust technology, domestic rubbish dehumidifying technology, flowing technology of solid material inside the system, heating technology during the process etc. are solved through the invention. Harmlessness and zero discharge, energy self-supply and basic energy source and substance recirculation in the process of production, social low cost input and facilitating operation of rubbish treatment, and every saving, exhaust reducing and material cycle in natural world can be realized.

The invention discloses a water quality improvement agent for aquaculture and a preparation method thereof. The water quality improvement agent is prepared from the following raw materials in percentage by weight: 5 percent to 10 percent of lactobacillus, 5 percent to 10 percent of photosynthetic bacteria, 5 percent to 10 percent of bacillus, 5 percent to 10 percent of brown sugar, 10 percent to 20 percent of activated carbon, 25 percent to 35 percent of zeolite powder, 3 percent to 5 percent of citric acid, 2 percent to 5 percent of sodium bicarbonate and 10 percent to 15 percent of calcium peroxide. According to the water quality improvement agent disclosed by the invention, organic matters in a water body of water for the aquaculture can be reduced, and the content of ammonia-nitrogen and nitrite is greatly reduced; the chemical oxygen consumption of pond bottom sludge is improved and oxygen debt of the pond bottom is alleviated; growth and proliferation of beneficial microorganismsand decomposition of organic pollutants are accelerated and the circulation of pond substances is accelerated; the proliferation of beneficial algae in a pond is accelerated so that the pond dissolved oxygen is increased; a culture water region environment is improved, healthy growth of aquatic animals is promoted, the feed coefficient is reduced and the economic benefits are increased.

The invention discloses a surface modifying method for a lithium nickel manganese oxide positive electrode material. The surface modifying method comprises the following steps: (1) soaking lithium nickel manganese oxide powder in an activating solution for 10-60 minutes, and washing until the solution is neutral; (2) heating activated lithium nickel manganese oxide obtained in the last step in a constant-temperature electric heating tank for 20-40 minutes at a heating temperature of 300-350 DEG C, thereby obtaining a lithium nickel manganese oxide substrate with elemental nickel on surface; (3) pouring the treated lithium nickel manganese oxide substrate with elemental nickel on surface into a chemical plating solution to obtain a mixture, magnetically stirring or ultrasonically dispersing the mixture for 20-60 minutes, then performing suction filtration, washing and vacuum-drying to obtain a nickel-coated lithium nickel manganese oxide material. The surface modifying method disclosed by the invention is used for uniformly coating and modifying the surface of the lithium nickel manganese oxide material through ultrasonic chemical nickel-coating; meanwhile, the nickel coating is an excellent conductor, so that the electrical conductivity of the material can be greatly increased after coating, and the material rate performance and the material cycle performance are improved in a facilitated manner.

The invention discloses a flower dedicated functional biological liquid fertilizer and a preparation method thereof. The flower dedicated functional biological liquid fertilizer is prepared through the following steps of: preparing clear liquid by separating biogas residues from biogas slurry obtained by fermenting livestock excrement through a methane tank; then degrading and adding photosynthetic bacterium strains to carry out amplification culture; and then mixing with chitosan, synergistic agents, trace element mixtures, nitrogen-phosphorus-potassium inorganic nutrients and natural plant essences in proportion. The flower dedicated functional biological liquid fertilizer has multiple functions of promoting rhizosphere soil substances of flowers to be transformed, improving the soil structures of potted flowers, enhancing the fertilizer preserving capability of soil, promoting the normal growth of the flowers, fixing nitrogen, enhancing the nitrogen level of the soil, promoting the proliferation of beneficial microorganisms of the soil, and participating in soil ecological substance circulation of the potted flowers together, and the like, prevents the troubles of turning over the soil and changing pots every year and reduces the labor intensity. The invention has small using amount of products, quick effect and long lasting effect, is mainly used for the spraying fertilization of the leaf surfaces of the flowers and the rushing fertilization of the roots of the flowers and enhances the cold resisting capability, the drought resisting capability and the disease resisting capability of the flowers and the fresh flower viewing period prolonging capability. The product plays a vital role on the regeneration utilization of finite resources, ecology protection and city garden environment beautification.

The invention belongs to the field of preparation of a lithium-sulfur battery cathode material, and particularly relates to a preparation method of a layered inorganic compound / conducting polymer / sulfur composite material used as the lithium-sulfur battery cathode material. According to the preparation method disclosed by the invention, a polymer and an inorganic layered compound are compounded in nanoscale, sulfur is coated and clamped between slice layers, so that a shuttling effect of sulfur is prevented; a layered material, e.g., a spring, can buffer a stress of volume expansion, keeps an inherent structure of the material, reduces active substance loss caused by volume expansion, and improves material cycle performance; the organic and inorganic composite layered material has a potential response cation exchange attribute, has a synergistic effect in the charging and discharging process when being compounded with sulfur, and improves rate capability of a battery; and a layer spacing of the layered compound can be regulated, and the suitable layer spacing is beneficial to transmission of Li+. The preparation method disclosed by the invention is simple in process step and convenient to operate; and the layered inorganic compound / conducting polymer / sulfur composite material has a wide application prospect in the lithium-sulfur battery cathode material.

The invention relates to a special ferment bacterium biological water cleaning agent for fish ponds, which comprises a culture medium base material, a microbian compound preparation, a feather meal, multivitamins and a compound enzyme preparation. The invention has the advantages that the ferment bacteria can quickly decompose hydrogen sulfide, ammonia gas, methane and other harmful gases in the rearing pond; the favorable conditions of the water quality in the rearing pond is kept, the photosynthetic bacteria can accelerate the circulation of nutrient substances, improve the pH value, enhance the oxygen content and reduce the oxygen consumption of organic substances, and therefore, the water cleaning agent can effectively promote the circulation of phosphonium and nitrogen and reduce the accumulation of the bottom mud; and photosynthetic bacteria are beneficial, and have the functions of promoting the digestive absorption of animals, stimulating the growth and development, enhancing the immunologic function and inhibiting various pathogenic bacteria. The water cleaning agent is very effective for improving the water quality; and the water quality starts to become clear 3 hours generally after the water cleaning agent is used. The water cleaning agent has favorable actions on preventing and treating myxobacteria, gill rot, stigmatosis, desquamation, red fin disease, enteronitis and graze; and the water cleaning agent can enhance the yield per mu by 15-23%, reduce the feed coefficient by 18-23%, enhance the survival rate by 20-60% and increase the individual weight by 15%.

A damping and shock absorbing method and apparatus for permanent or non-permanent use in the human body and having a shape memory alloy material cycled through stress-strain hysteresis to dissipate energy for effective damping. A sufficiently high pre-stress is applied to the damping element(s) to ensure that the damping working range is within the superelastic cycle. The damping apparatus can work in tension or compression or both in tension and compression. Moreover, damping elements from a shape memory alloy can also work in flexion and extension as well in rotation. The damping apparatus can have a stroke and force suitable for use in the human body by the design, the structure and the chemical composition of the shape memory alloy and their pre-set properties, such as plateau stresses of the superelastic cycle depend on the ambient temperature, the force of damping elements can also be changed in-situ by changing the temperature of the damping elements. The damping elements made out of a shape memory alloy can be combined with elastic elements made out of other materials to achieve stress-strain behavior more suitable for use in the individual human body.

The invention relates to a propylene polymerization production technology by a loop reactor batch liquid bulk method. With combination of a loop reactor and a batch liquid bulk reaction vessel, materials cycle between the loop reactor and the batch liquid bulk reaction vessel by an axial-flow pump of the loop reactor or with the addition of a pump, thus solving poor heat removing performance of the batch liquid bulk reaction vessel, controlling the pressure of the batch liquid bulk reaction vessel to be higher than the saturation pressure of the materials in the loop reactor, maintaining completely full state of the loop reactor and stabilizing the reaction pressure. In comparison with present production technologies, according to the invention, a reactor vacuum tank is canceled, the production capacity of devices is expanded, the utilization rate of a catalyst is raised, and a plurality of functions of production equipment is fully performed. The improved process is simple and easy to operate and the construction cycle is short; therefore, the production technology provided by the invention has a great economic benefit.

This invention relates to a kind esterification reaction technology of lactic acid, above all refer a coupling technology of adopting membrane course to integrate lactic acid esterification reaction. It takes lactic acid and alcohol as raw material. adding catalyzer and alcohol in reactor, adopting pressure actuated device to pressurize lactic acid, make lactic acid permeate porous membrane diverting device and enter liquid in reactor; heat reaction, at the same time adopt dehydration plant to deprive water from system; while reaction completed, adopt reduced pressure distillation method to separate mixed liquor of reaction which mostly contain lactic acid, alcohol, lactate as well as ounce water, to obtain high-purity lactate, and the rest materials for periodic duty. This invention solves a good many problems about low transformation efficiency, high dissipation of energy, equipment erosion and environmental pollution in existing esterification reaction craft.

The invention relates to an oil and smoke removing method and device with automatic cleaning function. The method is that: adopt a rotating structure to drive a filtering rotaing barrel made of filtering material to rotate and make the filtering material cycle through an air process zone, a liquid cleaning zone and an air back flushing zone in sequence; on the air process zone, the filtering material filters the oil and smoke in the air, the air after processed can be discharged out directly; on the liquid cleaning zone, adopting cleaning agent and spaying device to force the oil and smoke separated from the filtering material; on air back flushing zone, using high pressure air to blow away the cleaning agent remained on the filtering material. The device mainly comprises: a shell, a blower, filtering material and a rotating structure, the rotating structure comprises a wheel carrier, a filtering rotating barrel and a motor, the motor drives the filtering rotating barrel to rotate, the filtering material can rotate in the air process zone, the liquid cleaning zone and the air back flushing zone according to the pre-set speed. The device can work continuously and be under the situation of high efficiency and low flow resistance for a long time, which doesn't need manual regular cleaning and saves time and labour.

The invention provides a core-shell structure NCM (nickel manganese cobalt) ternary cathode material containing carbon nanotube and a preparation method thereof and belongs to the field of lithium ionbattery materials. The core-shell structure NCM ternary cathode material containing the carbon nanotube comprises a material body and a single-walled or multi-walled carbon nanotube, wherein the material body is composed of a core and a shell layer, and the carbon nanotube is contained on the surface of the shell layer. The preparation method thereof includes the steps of firstly preparing mixedsolution of a nickel compound and hydroxide, conducting coprecipitation reaction of mixed solution and the mixed solution of the nickel compound and the hydroxide to prepare nickel precursor core precipitate precursor solution, adding mixed solution of a nickel compound, a cobalt compound and a manganese compound to the prepared precursor solution for coprecipitation reaction to obtain a mixture of a lithium compound and a NCM compound containing the core-shell structure, roasting in air or oxygen to obtain the NCM ternary cathode material with the core-shell structure to be then fully mixed with the carbon nanotube, and finally obtaining the core-shell structure NCM ternary cathode material conntaining thecarbon nanotube. The core-shell structure NCM (nickel manganese cobalt) ternary cathode material containing carbon nanotube and the preparation method have the advantages of significantly improving material cycle performance while maintaining high capacity properties of the material,and having great application value in the field of energy storage.

The invention discloses an automatic hydrogen storage material cycle life tester and a testing method belonging to the technical field of hydrogen storage. The automatic tester comprises a gas sourcepart, a sample tank part and an evacuation system which are connected with a system main body, wherein a temperature control system is arranged outside the system main body and the sample tank part, and a computer, the temperature control system, the system main body, the gas source part, the sample tank part and the evacuation system are all connected with a data acquisition system and an automatic control system. According to the testing method, after sample loading, sample tank part volume calibration, system main body vacuumizing and parameter setting, subsequent hydrogen storage materialactivation and hydrogen charging and discharging circulation operation can be automatically carried out. According to the invention, hydrogen charging and discharging pressure and valve opening and closing are automatically controlled, test result deviation caused by manual operation system and data recording is avoided, manpower and time cost in long-time continuous cyclic test can be saved, andtest efficiency and test accuracy are improved.

The invention discloses a silicon carbon negative electrode material of a lithium ion battery and a preparation method of the silicon carbon negative electrode material, and mainly aims to improve thecomposite effect between silicon or oxide thereof and graphite by solving the technical problems so as to lower material polarization and improve material cycle performance. The negative electrode material is obtained by the steps of performing surface treatment and roasting and dispersing on silicon or oxide thereof, next, mixing with carbon micro powder and an organic carbon source, and performing coating, and finally carrying out carbonization treatment. Compared with the prior art, the silicon carbon negative electrode material prepared in the invention has relatively high cycling performance, excellent processability and easy batch production.

The invention provides a pool efficient ecological stereoscopic plantation and breeding method. A net cage is arranged in a pool, ricefield eel is bred in the net cage, water spinach is planted on the net cage, a bio-floating bed and the richfield eel breeding net cage are combined into one, a large quantity of freshwater fishes are bred and mandarin fishes are interbred outside the net cage, and thus an efficient ecological system with a material cycle and automatic purification is constructed. By utilizing solar energy, the water spinach absorbs nutrient materials of nitrogen, phosphorus and the like in pool water through developed root systems, the grown water spinach can serve as fish feed, and can also be used as a vegetable to be eaten by people. Through the purification effect of the water spinach on the water body, the water quality can be improved, the fish disease occurrence rate can be reduced, the medicine dose can be reduced, and the quality safety of the aquatic product can be improved. By breeding the ricefield eel in the net case, by stocking a large quantity of fishes in the pool and by interbreeding the mandarin fishes, the water surface resource is fully utilized, and the pool utilization rate is remarkably improved. The yields of famous and superior aquatic products and the water spinach are increased, the investment in water, electricity and medicine is reduced, and the economic benefit is increased by a large margin. Meanwhile, the pool efficient ecological stereoscopic plantation and breeding method has the effect of producing scenery, saving energy, reducing discharge and beautifying the environment.

The invention provides a comprehensive agricultural culture system which comprises a aquaculture system, a planting system, a livestock breeding system and a methane system, wherein the aquaculture system, the planting system and the livestock breeding system are connected with one another; the planting system and the livestock breeding system are also connected with the methane system; the methane system comprises a methane tank and a biogas power generation lighting lamp; the comprehensive agricultural culture system also comprises a plastic greenhouse; the plastic greenhouse covers the upper part of the planting system. After the comprehensive agricultural culture system is used, the multiple use of matter energy and the reasonable allocation of a biological structure can be realized according to the principles of material cycle and energy flow.

The invention relates to recycling of oil field vent natural gas, and particularly relates to a device for recycling vent natural gas in the production process of an oil-gas field. The device comprises a filter, a one-way gas valve, a gas buffer tank, a self-operated pressure valve, a compressor, an evaporator, a hydration separating unit, a gas storage tank, a bi-directional gas valve, a stop valve, a slurry pump, a screw pump, a laval spray valve, a surface active agent storage tank, a crusher, an ice-making device, a vertical type three-phase separator, a storage cavern, an air cooler, a throttle valve, a flow distributor, a water pump, a one-way valve, a bi-directional valve, a gas-liquid separator, a hydration recycling unit and a saturation stability unit. Through material cycle and refrigeration cycle of the device, the vent natural gas can be effectively recycled.

The present invention is method of preparing organic photosynthetic bacterial fertilizer with wastes from sugar-making and brewing industry. The fermented liquid, filter mud and slag from cane sugar and alcohol production used as materials are produced into organic photosynthetic bacterial fertilizer through material distribution, mixing, fermentation and other steps. The present invention realizes the high efficiency utilization and circular utilization of resource, and results in low consumption, low exhaust and high efficiency.

The invention relates to a completely-biodegradable casting polypropylene film and a manufacturing method thereof. The completely-biodegradable casting polypropylene film comprises an outer surface layer, a core layer and an inner surface layer, wherein 0.5-1.0 weight percent of completely-biodegradable material and other ingredients are respectively added into the outer surface layer, the core layer and the inner surface layer for preparation through the existing casting equipment and process. The completely-biodegradable material is a fused blend of a pre-oxidant A, a pre-oxidant B, a slow-release agent, a natural plant cellulose and polypropylene. The completely-biodegradable casting polypropylene film is abandoned to the natural environment to be degraded for two stages, wherein the first stage is oxidation fragmentation, and the second stage is biodegradation; finally, carbon dioxide, water and humus are generated, and thereby the purpose that plastics enters the natural material circulation system is achieved. The additive amount of the completely-biodegradable material is adjusted, so that the degradation cycle can be controlled, and the film does not influence the quality of soil after being completely biodegraded.

The invention discloses a harmless domestic sludge pyrolysis and carbonization treatment technique. The technique includes pre-stage domestic sludge premixing and standing treatment, pre-dehydration, shaping, dehumidification, granulation, pre-reaction, pre-pyrolysis reaction, full carbonization reaction and other treatment processes, the completely reacted solid carbonized matter is discharged out of a system by a discharger, and is then collected and stored, the gas generated in sludge pyrolysis is separated by a gas condensation and separation system, the uncondensed flammable gas is guided into a gas holder and stored as heat source for the system, and the condensed gas is centrally treated by a reclaimed water system. The invention realizes purposes such as harmless and zero discharge in the process of production, energy self-sufficiency and low consumption in the process of production, resource and basic energy substance recycling, energy saving, discharge reduction and natural substance recycling, and has the advantages of easy operation, low investment cost, remarkable economic benefit, significant discharge reduction effect for the environment and the like.