75results about How to "Improve gas production performance" patented technology

The invention discloses a cold-region methane accelerator and a preparation method of the cold-region methane accelerator and relates to a methane accelerator and a preparation method of the methane accelerator. The invention aims at solving the technical problems that the existing methane accelerators can not improve gas production rate at low temperature and are difficult to obtain. The cold-region methane accelerator provided by the invention comprises ferrum, cobalt, nickel, organic matters, an adsorbent and a filler. The preparation method comprises the following steps that: (1) ferrous sulfate, cobalt chloride, nickel chloride, the organic matters, the adsorbent and the filler are weighed; (2) distilled water is added to the weighed ferrous sulfate, cobalt chloride and nickel chloride to prepare saturated solution; the adsorbent is added; a crusher is used for crushing after drying to obtain powder; and (3) the organic matters and the filler are added to the powder and the mixture is evenly mixed to obtain the cold-region methane accelerator. The methane accelerator and the preparation method are applicable to the methane field.

A disclosed pretreatment method of promoting anaerobic fermentation of high-density sludge through alkaline-hydrolysis coupling ultrasonic processing comprises preparing sludge with the solid concentration TS of 7%-9% from dewatered sludge, adding calcium oxide powder according to the concentration of 0.01 g/g-TS, and stirring uniformly; and then pouring into a trough type ultrasonic generator for ultrasonic processing, and controlling the ultrasonic frequency to be 20 KHz, the power density to be 0.15 KW/L and the processing time to be 30 min. The dissolvable COD concentration and the dissolvable polysaccharide concentration of the sludge subjected to the above processing process are both substantially increased compared with those of sludge not subjected to pretreatment, the pH value is about 7.6, and the processed sludge can be directly poured for anaerobic reaction for fermentation and generating methane, and after the anaerobic fermentation reaction is performed for 25 d, the methane accumulated yield is improved by 55.1% compared with that of unprocessed sludge. The method is simple in operation, saves reagent usage amount and energy consumption, and does not influence subsequent processing and disposal, also the gas production performance of the sludge is improved and the anaerobic reaction period is shortened.

The invention discloses a device and a method for preparing a biological gas and a liquid organic fertilizer from fruit and vegetable wastes of a collecting and distributing center. The method comprises the following steps: squeezing and crushing the fruit and vegetable wastes collected by a collecting and distributing center to obtain a crushed solid raw material and a liquid, and directly feeding the liquid into an anaerobic fermentation reactor for fermentation; feeding the crushed solid raw material into a rotatable hollowed-out cylindrical hydrolyzing device arranged in a hydrolyzing and desilting basin for hydrolyzing and desilting, thereby obtaining a hydrolysate; and then feeding the hydrolysate into the anaerobic fermentation reactor for fermentation to generate methane, and sterilizing the digestive fluid left after fermentation at a high temperature to obtain a liquid fertilizer. According to the method, the fermentation period is shortened, the fermentation efficiency of the raw material is improved, the problems of difficult sorting of small impurities, huge influence on the anaerobic fermentation process, difficult degradation of high-fiber content wastes and the like are overcome, the impurities are prevented from entering the anaerobic fermentation reactor, and the fruit and vegetable waste processing capability and the gas producing capability are improved; meanwhile, the high-quality liquid organic fertilizer is produced, the cost is reduced and the efficiency is improved.

The invention discloses a biomass gasifier, comprising a gasifier body, a grate, an ash chamber, a support for supporting the gasifier and an ash discharging mechanism, wherein, the grate is arrangedin the gasifier body; the ash chamber is positioned below the gasifier body; the grate is in a flat structure with no hole in the middle; an ash discharging hole is arranged at the edge part at whichthe inner walls of the grate is connected with the gasifier body; an ash poking mechanism used for poking the ash residue on the grate into the ash discharging hole is additionally arranged on the grate; and the ash poking mechanism is connected with an ash poking drive mechanism which is arranged in a shield positioned below of the grate. By adopting the ash poking drive mechanism to drive the ash poking mechanism, the invention can realize the purpose of continuous ash discharge of ash residue on the grate, is beneficial for successfully carrying out the chemical reaction of biomass raw materials to improve the work efficiency of the gasifier, the middle part of the gasifier is in a flat structure with no hole, thereby avoiding the defect of materials leakage of the existing grate; and the shield arranged the ash chamber below the grate is used for protecting the ash poking drive mechanism.

The invention discloses a method for improving methane yield of corn straw anaerobic digestion by combined pretreatment of alkali and salt, and belongs to the technical field of anaerobic fermentation of agricultural organic solid wastes. The method comprises the following steps: crushing the corn straw, and carrying out pretreatment the corn straw by employing potassium hydroxide and metal salts as pretreatment agents, wherein the metal salts comprise ferrous chloride, cobalt chloride and nickel chloride; adding water, so that the total mass of the water and the water contained in the corn straw is six times of dry weight of the corn straw; fully stirring, and sealing by a sealing film; carrying out sealed storage at a room temperature for 3 days, and then carrying out anaerobic fermentation, wherein activated sludge is needed in the anaerobic fermentation process; adding activated sludge which is 12g TS relative to 52g of TS corn straw, and adding water to reach 80% of total volume of a reaction device; filling nitrogen, and sealing by virtue of a rubber stopper; and fixing the reactor in a table concentrator, and keeping the constant temperature of the table concentrator at 35+/-2 DEG C. According to the method, the anaerobic fermentation cycle can be shortened; the total gas production volume and the total methane production volume are greatly improved; and the removal rate of substances is significantly improved.

The invention discloses frozen bread dough containing compound plant antifreeze proteins, a preparing method thereof and a method for preparing bread through an optimized process. The frozen bread dough is prepared from, 40-50 wt% of bread special flour, 9-12 wt% of sugar, 0.5-1.5 wt% of yeast, 0.4-0.8 wt% of sodium chloride, 1.5-3 wt% of milk powder, 5-11 wt% of shortening, 0.05-0.15 wt% of fenugreek gum, 0.05-0.30 wt% of monoglycerides tartartaric acid diacetate, 20-30 wt% of water, 0.25-1.5 wt% of carrot antifreeze protein powder, 0.5-3 wt% of Tangut rhodiola rosea leaf antifreeze protein powder and 0.5-3 wt% of polygonum viviparum leaf antifreeze protein powder. The bread produced after the bread antifreeze dough is unfrozen, leavened and baked has the advantages of being large in specific volume, crispy, soft and delicious, and extremely excellent in sensory quality.

The invention relates to a fermentation reactor integrating functions of stirring and crusting breaking and a stirring crust-breaking method, and the problems in the prior art are solved that an anaerobic reactor is low in gas production rate and low in gas productivity during fermentation. The fermentation reactor comprises a digester, a heat tracing band, a heat-insulation layer and a protective layer; the fermentation reactor also comprises a digester upper cover, a first stirrer with a frequency converter, a charge level indicator, a second stirrer with a frequency converter and a third stirrer with a frequency converter; the digester upper cover is buckled on the digester; the protective layer, the outer side wall of the digester is successively sleeved by the heat-insulation layer and the heat tracing band from outside to inside; the inner side wall of the digester is provided with a feed inlet; and the first stirrer with the frequency converter and the third stirrer with the frequency converter are disposed on the digester; the second stirrer with the frequency converter is disposed on the bottom inner wall of the digester. The fermentation reactor integrating the functions of stirring and crusting breaking is applied to the field of full-mixing anaerobic fermentation.

The invention discloses a resource utilization method of sludge biogas residue. The resource utilization method comprises the steps that a flocculating agent is added to raw sludge from a sewage plantfor dehydration to obtain dehydrated sludge; the obtained dehydrated sludge is subjected to anaerobic digestion treatment to obtain digested sludge and generate biogas; the obtained digested sludge is dried, and obtained solid sludge biogas residue is subjected to low-temperature pyrolysis to obtain pyrolytic carbon; and the sludge biogas residue pyrolytic carbon is added to the dehydrated sludgefor anaerobic digestion treatment. According to the resource utilization method of the sludge biogas residue, the dehydrated sludge is subjected to anaerobic digestion treatment, so that centralizedtreatment of municipal sludge is facilitated, reduction of the sludge is realized, problems of existing anaerobic digestion sludge treatment are solved, and a new method is created; and by optimizingan anaerobic digestion treatment process of a sewage treatment plant, a novel treatment method for sludge treatment stabilization and reduction is provided, the effect of anaerobic digestion treatmentof the sludge is improved, the degree of stability of heavy metal pollutants is improved, "pollution control by pollution" cyclic utilization of resources is achieved, and the sludge production rateis reduced.

The invention discloses a low-temperature straw biogas fermentation promoter and a preparation method thereof, and relates to the technical field of agricultural production. The promoter is prepared from the following raw materials in parts by weight: 10 parts of FeCl2.4H2O, 2-4 parts of NiCl2.6H2O, 1-2 parts of CoCl2.6H2O, 44-67 parts of wheat bran and 20-40 parts of cellulose in dissolving and even mixing manners. The low-temperature straw biogas fermentation promoter has the advantages of being simple in ingredient, low in cost, easy to prepare, flexible to use, easy to regulate and control and the like, low-temperature inhibition is relieved by adding the promoter, and efficient gas production of the straw biogas is achieved.

The invention discloses a method for promoting anaerobic fermentation to produce biogas by alkali-pretreated banana straw cooperating with pig manure. The banana straw is subjected to alkali pretreatment, and then the banana straw after alkali pretreatment is mixed with the pig manure for anaerobic fermentation. The alkali pretreatment can greatly improve the raw material utilization rate and thegas production effect of the banana straw, shortens the start-up time of anaerobic fermentation, and makes the fermentation system more stable; then the banana straw after alkali pretreatment is mixedwith the pig manure for anaerobic fermentation, the total gas production amount can be further improved and the level of resource utilization of waste is improved. The problems of difficult degradation of cellulose, more inhibiting factors, unstable system and low gas production efficiency when the banana straw and the pig manure are treated separately are solved.

The invention discloses a method for improving the anaerobic digestion gas-production performance of maize straws through directional acidification pretreatment, and belongs to the field of efficient resource utilization of maize straws. The method comprises the following steps: carrying out pretreatment on maize straws by using sodium hydroxide; acidifying the maize straws, and adding activated sludge into the pretreated maize straws, wherein relatively, 10-50 g of TS activated sludge is added into 52 g of TS maize straws; adding tap water until the tap water accounts for 80% of the total volume of a reaction container, mixing the obtained object, filling nitrogen into the reaction container, and hermetically fixing the container in a shaking table, wherein the temperature of the shaking table is kept at 40+/-2 DEG C; measuring the pH value by using a pH meter every time, and when the pH value is less than 5.5, stopping acidifying; and after methanation startup is completed, by taking an acidified discharged material as a raw material, carrying out feeding and discharging once a day, wherein a fed material and the discharged material are same in volume, and the HRT (hydraulic retention time) is 40 days. According to the invention, the separation of an acidification stage and a methanation stage in biological sciences is realized, and the effects of acidification bacteria groups and methane-producing bacteria groups in respective stage are enhanced, thereby facilitating the stable and efficient operation of an acidification phase and a methane-producing phase, and greatly improving the biodegradability and gas production performance of maize straws.

The invention belongs to the field of natural gas hydrate exploitation, and provides a natural gas hydrate exploitation system and method based on CO2 fracturing, the system comprises a fracturing system, a gas production system, a data monitoring system and a main well, and fracturing wells and depressurization wells in the main well are alternately arranged in a star shape along the axis of the main well. The method comprises the steps that firstly, free gas in a reservoir is released, after the reservoir is stabilized, supercritical CO2 fluid is injected, heat is provided for the reservoir, CO2 hydrate is generated while hydrate decomposition is promoted, and the strength of the stratum is enhanced. And when the gas production rate is reduced again, the supercritical CO2 fluid is injected for the second time to carry out secondary fracturing and reservoir strengthening on the reservoir. The fracturing mode is carried out in the mode that fracturing fluid nozzles are spirally arranged on a fracturing well, and multi-angle transformation of the hydrate reservoir is achieved. The depressurization wells and the fracturing wells are separately arranged in a star-shaped arrangement mode, pressure regulation and control are facilitated, the mining range is effectively enlarged, the stability of gas production and the safety of the whole system are guaranteed, and the mining efficiency and the CO2 storage amount are improved through cooperation of multiple wells.