481 results about "Marsh gas" patented technology

The present invention discloses a method for removing the hydrogen sulfide from the gas containing the hydrogen sulfide and for recycling the sulfur element with the catalytic oxidation effect, and discloses a device thereof. A catalytic oxidation system consisting of iron ion and ethylenediamine tetracetic acid is used, so that the hydrogen sulfide is transformed to the sulfur element so as to be removed from the air stream containing the hydrogen sulfide; the hydrogen sulfide removing rate reaches 99.9 percent. The method of the present invention not only can be used for removing the hydrogen sulfide in the gas from the manure processing field, the urban living garbage transshipping station, the public toilet, the sewage treatment plant, the solid waste processing field, the oil refining plant and the animal dead-body sanitary processing field, but also can be used for removing the hydrogen sulfide in the fuel gases such as the marsh gas, the land-filling gas, the natural gas, etc. During the treatment process, except the useful sulfur element is produced, no other product that influences the environment is produced.

The marsh gas fermentation process with composite microbial preparation treated stalk includes the following steps: crushing stalk material, wetting with water for 18 hr, adding composite microbial preparation and ammonium bicarbonate as the nitrogen source, replenishing water and mixing, stacking and covering with plastic foil, fermenting for 3-6 days and maintaining at temperature over 50 deg.c for 3 days, transferring to marsh gas tank, adding ammonium bicarbonate methane producing inoculum and sealing for 2-7 days to produce marsh gas. The present invention has fast marsh gas producing speed and raised marsh gas producing quantity.

A process for cleaning the marsh gas in order to use it as non-toxic fuel features that a membrane separation technique is used for separating CH4, CO2, H2O and H2S from marsh gas.

The invention provides a method for preparing natural gas without sulfur by marsh gas, which comprises the steps of: a, impurity removal; b, desulfurization; c, pressurized pushing; d, absorption displacement, namely carbon dioxide gas contained in the marsh gas processed by the steps is absorbed through an absorption tower in a solution displacement mode; e, cooling dehydration, namely the marsh gas processed by the steps is cooled and finishes the dehydration, and the water content of the marsh gas is controlled to be below 80 percent of relative humidity; and f, secondary filtration, namely the marsh gas processed by the step e is further filtered through a secondary filtration device to remove other impurities in the marsh gas to obtain the natural gas without the sulfur (the content of methane is between 85 and 99 percent). The invention also discloses a device for preparing the natural gas without the sulfur by the marsh gas. The method has the advantages that the marsh gas has high purity and is suitable to be massively and efficiently utilized, the utilization rate of raw materials for preparing the marsh gas is improved and the like.

A method for cyclic utilization of rejected biomass includes such steps as decomposing in a multi-class fermenting pool, gas-solid-liquid separation, desulfurizing the marsh gas containing H2 and methane, feeding the marsh gas in the fuel battery with anionic exchange membrane, generating CO2 at negative electrode, using the separated liquid for soilless culture of plants, using said fuel battery to power the artificial light source, and using the residual dregs as the crop culturing matrix or organic fertilizer.

The invention relates to the fields of environment friendliness and renewable energy source recycle. A method for separating and producing methane and carbon dioxide from marsh gas, which is realized through five steps as follows: pretreatment, methane separation, rich liquid flash vaporization, carbon dioxide recycle and adsorbent regeneration. The volume ratio of the separated methane is up to over 96%, and the volume ratio of the carbon dioxide is up to over 98%. The invention has the characters tics of simple process, low energy consumption, nontoxicity, high purity and safety process. Byusing the method, not only is low-carbon circular flow of economy realized, but also pollution to the environment is prevented.

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 present invention is one comprehensive innocuous city solid refuse treating system. In the system, the city solid refuse is first stoved, sterilized and sorted, then magnetically separated to separate out iron containing waste, and finally sieved into the undersize fed to one mixing tank and the oversize further sorted, with the rest matter being crushed and fed also to the mixing tank for fermentation to produce organic fertilizer. The sorted fabric, paper, iron, glass are reused; the sorted building refuses are crushed and further produced into no-burning brick; the waste battery is specially treated; the waste plastic and rubber are treated to produce oil; and the marsh gas generated in the fermentation process is used to provide heat for stoving refuse and refining oil. The present invention has excellent refuse treating effect.

The invention relates to a pollution-free synthetic treatment method for garbage in villages and towns, comprising: after collecting the garbage in the villages and towns, classifying biomass garbage and non-biomass garbage, then classifying the biomass garbage into non-perishable biomass garbage and perishable biomass garbage, crushing the non-perishable biomass garbage and pressing into blocks, further feeding into a pyrolytic gasification device to perform the pyrolytic gasification so as to be combustible biomass gas, and sewage of the perishable biomass garbage entering into an anaerobic fermentation device, being marsh gas after the anaerobic fermentation, slag charges thereof entering into a slag tank, slag liquid entering into a liquid storage tank to be field fertilizer, accessing the biomass gas and the marsh gas into a furnace, and using the high temperature of the hearth to effectively treat dioxin in the biomass gas. The usable material, charcoal, fuel, hot water reclaimed and produced in the treatment procedure can bring benefits for the processors, thereby forming a good recycle of the garbage treatment.

The invention provides an improved farming-above and fishing-below ecology breeding method in the saline-alkali land. A sunlight greenhouse (1), a fish pond (4), a livestock breeding house (2), a residence house (5), and a methane pond (3) are arranged concentratively. The dejection can be used for feeding the fish or be put into the methane pond, the marshy liquid and the marshy dregs can be used for fertilizing the field or fatting the fish, and the methane can be used for lighting or cooking. Through matching the agricultural integrated producing technologies, the invention can make up the deficiency of the own condition of the earthiness, and can ensure that the saline-alkali wasteland tends towards the virtuous ecological cycle after the project is put in practice. The forage grass planted in the cropland can be used to feed the livestock, the dejection of the livestock can be used to feed the fish or produce methane, the silt and the marshy liquid of the fishing pond can be used to fertilize the cropland. The greenhouse and the fishing pond can produce the pollution-free and green food, which can improve yield benefit of the soil maximally. The peasants in the area can be led to be rich and to live a relatively comfortable life.

Production of methane from land-filled garbage gas and its apparatus are disclosed. It is carried out by pressing the abstracted land-filled garbage gas, freezing drying, multi-stage filtering, pretreatment process of adsorption drying, high-pressure adsorbing, co-current pressure equalizing, constant-pressure recovering, and pressure varied adsorption circulating. The apparatus consists of compressors connected orderly, freezing direr, filter, drying tower and pressure varied adsorption circulating system with 2-6 parallel adsorbing columns. Its advantages include simple apparatus and operation, low cost and good flexibility.

The invention disclose a sludge phase-splitting slaking method of waste water disposing plant involving to a sludge disposing and resource utilization technology, which comprises the following steps: proceeding aerate hydrolytic slaking reaction 6d with dissolved oxygen at 1.5-2 mg/L, pH value at 5.5-6.0 and temperature at 30-35 deg.c; getting hydrolytic slaking product; entering into centrifugal machine; proceeding solid-liquid separation; getting hydrolysate and mud cake; entering hydrolysate into filling-type methanation reacting bed with temperature at 32-38 deg.c and cycling speed at 0.005-0.02m/s; proceeding methanation slaking with waterpower residence time at 3d; getting marsh gas and slaking yielding water; leading marsh gas to gas-fired boiler; producing vapor; refluxing slaking yielding water to distribution well of sewage disposal plant; mixing mud cake with dry sludge till moisture percentage at 50-60%; heating and drying with vapor producing by boiler in dehumidifier; getting dry sludge with moisture percentage at 32-38%; using to land.

The present invention discloses a method and a device for recycling the waste heat in the discharged smoke of marsh gas power generation. According to the method of the invention, the discharged smoke after power generation of a marsh gas internal combustion engine (3) enters a waste heat boiler (4) for heat exchanging with the water, and the smoke after temperature reduction is discharged; the steam generated after heat absorption of the water enter a screw bolt expansion power machine (6) and a generator (7) for expanding, work applying and power generating, the discharged steam enters a condenser (8), and the condensed water enter the waste heat boiler (4) for recycling. Compared with the prior art, the invention uses the waste heat of the discharged smoke after marsh gas power generation for generating the steam. Then the steam enters a low-grade heat energy power machine-screw bolt expansion power machine for expanding, work applying and power generating. The low-grade heat is directly converted to the electric energy. The generated electric power can be combined with the electric power generated by the marsh gas internal combustion engine and sent to the electric network. The method and the device of the invention have the advantages of easy implement, strong operability and no effect by the position of the marsh gas power generating plant. The heat can be directly converted to the electric power and transmitted to the outside. The limitation of waste gas utilization mode of traditional smoke discharging is overcome.

The invention relates to a heat pump marsh gas tank, in particular to an air energy, solar energy and ground source heat pump marsh gas tank, which belongs to environment engineering equipment. The heat pump marsh gas tank consists of an anaerobic digestion system, a heat insulation and thermal preservation system, a solar energy hot water system, an air energy heat pump system, a ground source heat pump system and a control system, wherein the tail end heat exchange equipment of the ground source heat pump system, solar energy hot water pipelines and the air energy heat pump system are connected with the heat insulation and thermal preservation system and the anaerobic digestion system through hot water circulation pipes, a hot water transit box arranged in the thermal preservation system is used for regulating and balancing the hot water of heat resource systems, hot water heats the anaerobic digestion tank through circulation pipes for promoting the anaerobic digestion, and the hot water circulation pipes can be arranged inside the anaerobic digestion tank and can also be arranged outside the anaerobic digestion tank. The marsh gas tank can also provide hot water and cold air at the same time of producing marsh gas, and the invention can solve the problems of high production cost, great energy consumption and the like of winter production of the marsh gas engineering, and can be popularized easily.

The invention discloses a fermenting method and product of algae methane power in the environment protective and new-energy technical domain, which comprises the following steps: adjusting the rate of carbon and nitrogen; controlling dried ferment; seeding microbe; controlling temperature; circulating ferment liquid; stirring; utilizing methane, liquid and slag effectively. The method makes methane content to 74%, which supplies gas stably.

A process for preparing organic liquid fertilizer from water hyacinth and the stem and leaf of agricultural crops includes breaking raw materials, squeezing, solid-liquid separation, sterilizing the liquid by ozone, microbial fermenting, and mixing with the dregs generating by fermentation to prepare marsh gas. Its advantages are high fertility and no environmental pollution.