34results about How to "Ensure a virtuous circle" patented technology

The invention discloses a fertilizer-generating method using organic waste of cattle farm, which comprises the following steps: adjusting ratio of C / N and moisture; adding aerobic fermenting organism preparation; treating the mixture with aerobic fermentation, second fermentation and disintegration; adding macro-element fertilizer or micro-element chemical fertilizer and modifier of fertilizer or vegetation; granulating and getting organic fertilizer or organic-inorganic compound fertilizer. The invention has property of convenient method, can treat organic waste in cattle farm one time; and products fertilizer with flexible nutrient ratio, high adaptability and significant production-increase effect.

An environmental protection type bast fibre film which is air permeable and impervious is prepared from bast fibres through opening fibres, removing dust and impurities, carding, stripping for netting, airflow netting, chemical sticking by adhesive to become film, applying the hydrophobic agent onto its surfaces, and cold rolling.

The invention discloses a graded sand taking and conveying system used for tailing reuse of a tailing pond. The system consists of a tailing input unit, a tailing grading and sand taking unit, a tail sand conveying unit, and a tail sludge output unit, wherein the tailing input unit consists of a sand pump and an input pipeline; the tailing grading and sand taking unit comprises a spiral grader special for tailing grading and sand taking; the tail sand conveying unit is a belt conveyor; and the tail sludge output unit consists of the sand pump and a tail sludge output pipeline. The distance between spiral leaf boards of the spiral body of the spiral grader is 290 to 320mm; the ratio of the height h of a downflow weir of a groove body to the spiral diameter D of the spiral body is between 1.2 and 1.4; the gradient of the groove body is 19 to 21 degrees; a motor adopts a frequency-variable speed-regulating motor; and the spiral leaf boards of the spiral body are made of manganese steel. The system can realize sand taking, grading and dewatering of the tailing pond; the reliability is high; the system is convenient to operate; product yield is higher; material can be fed continuously;and the requirement on large-scale production can be met.

The present invention discloses a low carbon and high efficiency pool for aquaculture that comprises a pool, a bottom of the pool is fixedly connected with a plurality of partitions, and the partition is disconnected with a circumference of the pool. An U-shaped groove is provided at the bottom between the partitions and between the partition and a side wall of the pool, and an oxygenation apparatus is provided in the U-shaped groove. A front end of the pool is fixedly connected with a water flow driving apparatus, a rear of the pool is a settling zone, a rail is disposed above the settling zone, and a crane-like absorption pump is disposed on the rail. At least two layers of metal blocking nets are provided between the settling zone of the pool and the partition. According to the pool of the structure in the present invention, compared with the traditional mode, cultured fishes in the poor live in the flowing water with high dissolved oxygen all the time, which results in a high growth rate, a high survival rate, a high per unit yield, a low forage coefficient, easy disease prevention and control, simple production and management, and convenient fishing. The pool is suitable to culture of various species and specifications, achieves equalization on the market, speeds up cash flow, and cuts the production cost by 35%.

The invention discloses a dissolution process and desulfurization method for producing aluminum oxide by using high sulfur bauxite. The method is characterized in that the sulfur content of a circulating mother liquor is controlled under the suitable conditions, bayer dissolution is performed on the high sulfur bauxite by adopting a 'low temperature and high alkali' process, sulfur in ores transferring into a sodium aluminate solution is reduced while obtaining a relatively high aluminum oxide dissolution rate, a part of sulfur is consumed through self-balancing of a system, and appropriate desulphurization is performed on a decomposition mother liquor or causticized liquid by using barium salt when the sulfur content in the system is accumulated to a certain extent so as to keep the virtuous circulation of the whole production process. The dissolution process and desulfurization method, disclosed by the invention, do not change the existing bayer-method aluminum oxide production process, are low in cost and simple and convenient in operation, and provide a good foundation for the industrialization of the high sulfur bauxite; desulfurization slag can be used as a raw material for preparing a barium salt desulfurizer so as to further reduce the production cost.

The invention relates to a technology for preparing calcium iodate by taking brine rinsed with crude zinc oxide as a raw material. The technology comprises the following steps: (1) evaporating and concentrating the brine rinsed with crude zinc oxide, and performing centrifugation to obtain iodine-containing brine; (2) adding hydrochloric acid to the iodine-containing brine, then dropwise adding hydrogen peroxide, when the pH value of the system is 1-2 and no iodine is formed, stopping reacting, and performing filtration to obtain iodine precipitate; (3) adding alkali liquor to the iodine precipitate, and when the pH value of the reaction liquid is 8-9, performing stirred dissolution and filtration to obtain an iodine-containing solution; (4) preparing a chlorate solution, then dropwise adding the iodine-containing solution to the chlorate solution, when the pH value of the system is less than or equal to 1, the temperature is 85-90 DEG C and the reaction liquid is colorless, stopping reacting, and performing filtration to obtain a hydrogen iodate solution; and (5) adding calcium salt to react to produce calcium iodate, filtering the calcium iodate, washing filter cakes, and then, drying the washed filter cakes to obtain a finished product. Technological processes realize the closed production of iodine, the technology and equipment are simple, the economic cost is low, and thetechnology is suitable for industrial automatic production.

The invention discloses a granular compound fertilizer prepared by using modified starch as a binder. The compound fertilizer is characterized by comprising the following raw materials in parts by weight: 15-40 parts of nitrogenous fertilizer, 20-40 parts of phosphatic fertilizer, 20-42 parts of potash fertilizer and 0.5-2.0 parts of binder. The raw materials of the binder consist of 35-45 parts by weight of starch, 1-5 parts by weight of phosphate, 0.1-3 parts by weight of oxidant, 0.1-1 part by weight of coupling agent and 40-60 parts by weight of water. The binder contained in the granular compound fertilizer has good adhesion capability, so the granular compound fertilizer disclosed by the invention has the advantage that adhesive capability is good, the rotary drum granulation pelletizing ratio is high and the material returning rate is reduced; the pertinence is strong and the fertilizer efficiency is completely releases, so that the soil is hard to harden and the yield-increasing effect is prominent; and the virtuous circle of the soil nutrient can be maintained, the water and nutrient retention capability of the soil is improved and the resistance of the crops is enhanced.

The invention discloses an ecological pond used for aquaculture. The ecological pond comprises a plurality of filter ponds which are divided by a dam, wherein a water pushing device is arranged on the dam among the filter ponds; and a pond is arranged in one of the plurality of filter ponds. In comparison with a conventional mode, the ecological pond with the structure enables fish cultured in the pond to grow in flowing water with high dissolved oxygen all the time, so that the fish is high in growth speed, high in rate of survival, high in yield per unit and low in feed coefficient; and the ecological pond is liable to prevent and cure diseases, simple for production management, and convenient for capturing the fish. Meanwhile, the filter ponds achieve the effect of purifying water, so that water is recycled, and therefore, effects of saving water sources are achieved. The ecological pond is suitable for multi-variety and multi-specification breeding, so that the fish appears on the market in a balanced mode; the turnover of capitals is accelerated; and the production cost can be reduced by 35%. The greatest advantage of the technology is that 75% of fish metabolite and residual feed can be effectively collected, the virtuous circle of the fish pond is guaranteed, energy conservation and emission reduction are realized, and the environment is protected, thereby realizing low-carbon, high-efficiency and sustainable development of the aquaculture industry.

The present invention relates to the application of azadirachtin in the preparation of seed coatings. The application of azadirachtin in seed coatings for the first time overcomes its photosensitivity weakness and is applied to soil, and its insecticidal effect is not washed by light, evaporation and rain. The influence of azadirachtin can protect the maximum amount of drug on the target body, thereby enhancing the stability of azadirachtin, prolonging the effective period, giving full play to the insecticidal and sterilizing functions of azadirachtin, and controlling various seed pests and diseases. At the same time, for the first time, sulfur powder is used as the active ingredient of the seed coating agent to give full play to its protective bactericidal and insecticidal properties and reduce the cost of the seed coating agent. In particular, it has a high co-toxicity coefficient with azadirachtin, which solves the defects that sulfur is easy to precipitate and agglomerate, and also ensures that azadirachtin has better stability.

The invention discloses a nanometer fluid self-dispersion device, which comprises a shell provided with an inlet and an outlet, and an impeller, a first revolving shaft, a first gear, a second gear, a second revolving shaft, a cutting blade, a sieving chamber and a mixing chamber which are positioned inside the shell. According to the self-dispersion device, agglomerated nanoparticles enter a cutting chamber under the sieving action of a sieve plate, and self-dispersion is performed by using the cutting movement provided by pressure difference, so that nanometer fluid has a self-dispersion function. The invention further discloses a lithium bromide absorption refrigeration circulating system, which comprises a condenser, a generator, an evaporator, an absorber, a heat exchanger, a U-shaped throttling tube, an anti-crystalizing tube, a generator pump, an absorber pump, the self-dispersion device, an evaporator pump, a vacuumizing device, a solution three-way valve, a high-pressure cylinder and a low-pressure cylinder. According to the lithium bromide absorption refrigeration circulating system, the absorber pump or the generator pump is used for driving the self-dispersion device to run, so that the stability and reliability of the lithium bromide absorption refrigeration circulating system are improved.

The invention provides a method for constructing a multi-objective medium- and long-term random dispatching model for ecological power generation of cascade reservoirs and an optimal dispatching method, including the following steps: 1. Analyzing the random inflow runoff of cascade reservoirs, and adopting the ecological water demand level index method Calculate the suitable ecological flow as the ecological flow reference value; 2. Establish a multi-objective medium- and long-term optimal dispatching model for cascade reservoir ecological power generation, which includes the objective function of the closeness degree of power generation of the cascade reservoir, the objective function of the closeness degree of ecological flow rate and constraints; 3. Adopt Reinforcement learning SARSA algorithm solves and learns the model under different random runoff scenarios, and introduces heuristic function and utility trace function to improve the accuracy and solution speed of the algorithm; 4. According to the scheduling rules learned by the algorithm, it is obtained that the ecological Medium- and long-term dispatching scheme of cascade reservoirs with the largest comprehensive closeness of power generation. The invention improves the comprehensive utilization benefit of water resources and improves the scheduling effect.