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10471results about How to "Reduce moisture content" patented technology

Organic material based uniprill fertilizer

An organic-based uniprill fertilizer is provided. To produce the fertilizer, organic matter is sequentially pre-treated by first mixing it in a first grinder with a lime admixture, then adding a slurry of reagents and binders, followed by a mixture of acids. The acids can include sulfuric and phosphoric acids, in addition to nitric acid and various organic acids such as citric and fulvic acid, depending on the end requirements of the fertilizer product. Following the mixing of the pre-product with the mixture of acids and reagents, the resultant raw product is preferably processed through a second grinder. This grinding further dries, mixes and granulates the raw product. The particle size of the completed fertilizer is reduced into a flowable, user safe uniprill product that can be further ground to reduce its moisture. Further drying may be necessary for bag or bulk product, or it can be liquified by high speed blending or micro-fluidized for sprinkler or drip applications. The uniprill fertilizer comprises small, preferably microscopic particles that are homogenous in nature, in that any single particle is substantially identical in composition to all other particles of the fertilizer. Additionally, each uniprill particle contains substantially all sixteen nutriments and minerals required for the growth of healthy plants.
Owner:GREEN TRIANGLE

Method for preparing carbon materials by use of sludge

The invention provides a method for preparing carbon materials by use of sludge. The method comprises the following steps: preheating of high-water-content sludge to obtain preheated sludge; primary separation of water and solid particles: viscous organic matters in the preheated sludge are hydrolyzed, colloid structures and cell membrane walls of the sludge are destroyed, so that the bound water and the solid particles can be effectively separated; secondary separation of the water and the solid particles; dewatering to obtain dewatered sludge with the water content down to about 40%; and carbonization: preparation of biological carbon. The method also comprises further modification treatment of the biological carbon to prepare adsorption carbon materials. The method also comprises anaerobic fermentation of the dewatered sludge to produce biogas. The adsorption carbon materials prepared by the method can be recycled to a wastewater treatment plant for the adsorption of heavy metals, nitrogen and phosphorus and the organic matters in sewage, and cyclic utilization of the sludge in the wastewater treatment plant can be realized; and the combustible gas generated in the process can be used as a supplementary fuel of a pyrolysis carbonization furnace. The method has the advantages of cyclic utilization, recycle of waste materials and ecological environmental friendliness.
Owner:中科核润(陕西)生态环境有限公司

Natural gas hydrate water discharge gas production exploitation device and exploitation method of natural gas hydrate water discharge gas production exploitation device

The invention provides a natural gas hydrate water discharge gas production exploitation device and an exploitation method of the natural gas hydrate water discharge gas production exploitation device, and belongs to the technical field of natural gas hydrate exploitation. A feeding cavity (12) communicated with a natural gas hydrate layer (29) is connected with an in-well gas-liquid separator (7), an exhaust cavity (8) of the in-well gas-liquid separator (7) is communicated with a gas production sleeve pipe (17), and a water discharge opening of the in-well gas-liquid separator (7) is communicated with a liquid storage cavity (2) arranged at the lower part. According to the exploitation method adopting the device, the natural gas hydrate layer (29) is firstly heated, the in-well gas-liquid separator (7) is utilized for separating gas-water mixture generated in the natural gas hydrate decomposition process, meanwhile, a liquid level monitoring device is utilized for regulating the water discharge speed of an electric submersible pump (4), and the decomposition speed of the natural gas hydrate is controlled. The device and the method have the advantages that the natural gas hydrate exploitation well liquid accumulation can be effectively prevented, the gas production efficiency is improved, the work is safe and reliable, the environment is protected, the service life is long, and the like.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Alkali activated solidification and stabilization treatment method of refuse incineration fly ash

The invention relates to an alkali activated solidification and stabilization treatment method of refuse incineration fly ash. The method comprises the following steps of: A: carrying out a pretreatment on the refuse incineration fly ash; B, then adding water and heavy metal stabilizing agents and fully stirring so as to fully integrate soluble heavy metals in the fly ash with the heavy metal stabilizing agents and then realizing a mineralization stability; C, adding alkali activating agents into fly ash slurry after finishing the B step and fully stirring; D, carrying out a heating treatment on a water bath after finishing the C sep, controlling a heating temperature and a heating time, and aperiodically stirring so as to uniformly heat the fly ash slurry materials; and E, finally shaping and maintaining the mixed materials so as to further blockade mineralized heavy metals in the fly ash and simultaneously solidify dioxin in the fly ash, and finally realizing the harmless solidification and stabilization of the fly ash. According to the method provided by the invention, the gelling reaction of the fly ash is generated by using the alkali activating agents to activate the fly ash activity only on a base of regulating the fly ash activity, and the double-effect stabilization of the fly ash is obtained by simultaneously supplementing the heavy metal stabilizing agents; moreover, the method has the advantages of low cost, good effect, low increase-volume rate and no secondary pollution.
Owner:深圳市龙岗区东江工业废物处置有限公司
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