71results about How to "Less ash" patented technology

The invention relates to machine-spraying-type plastering gypsum and a preparation technology thereof and belongs to the technical field of building materials. The machine-spraying-type plastering gypsum is characterized by being prepared from the following raw materials: 200-400 parts of gypsum, 10-60 parts of cement, 520-650 parts of fine aggregate, 80-160 parts of heavy calcium powder, 2-4 parts of redispersible emulsion powder, 2-4 parts of hydroxypropyl methyl cellulose ether, 0.15-0.25 part of an air entraining agent, 5-10 parts of expanded perlite, 0.3-0.8 part of a gypsum retarder and 200-300 parts of water. The machine-spraying-type plastering gypsum is applicable to being directly sprayed to a wall surface by adopting a mortar spraying machine, both time and labour are saved, construction efficiency can be improved, and cost is reduced; bonding performance with the wall surface is good, rebounce is not caused, anti-sagging performance is good, both bonding strength and compressive strength can meet requirements, and cracking of a wall body can be reduced; and usage amount of gypsum is low, and cost can be effectively reduced.

Solid waste that includes a mixture of wet organic material and dry organic material can be are separated using mechanical separation to produce a wet organic stream enriched in wet organics and a dry organic stream enriched in dry organics. The separated wet organic stream and dry organic stream are separately converted to renewable or recyclable products using different conversion techniques particularly suited for the separated wet and dry organic streams.

The invention discloses solid fuel manufactured by municipal solid wastes without manual classification. The solid fuel is manufactured by the following components in percentage by weight: 75%-85% of treated municipal solid wastes, 2%-7% of coal dust containing fixed carbon and 10%-20% of mixed additives. The invention aims at overcoming the defects in the prior art and increasing a novel treatment technology taking a biotechnology as a main technology to carry out advanced treatment on the municipal solid wastes, thereby providing the solid fuel which turns wastes into useful things by taking the municipal solid wastes as raw materials, has low production cost and little pollution, is beneficial to the environmental protection and has high combustion efficiency; and in addition, the invention has an other purpose of additionally providing a method which has simple process and environmental protection and is used for producing the solid fuel for changing a biochemical treatment methodof percolate generated in the wastes treatment process, wherein the biochemical treatment method has high production cost.

The invention provides low-sulfur and environment-friendly coal which mainly comprises, by weight, 40-70 parts of semi coke powder, 20-50 parts of coal slime, 20-50 parts of pulverized coal, 1-5 parts of a binder and 2-6 parts of an additive. The semi coke is a novel carbon material which is obtained through carbonization and pyrolysis of cohesionless or weak-viscosity high volatile bituminous coal at the medium and low temperature, and the fixed carbon amount of the semi coke is larger than or equal to 82%. The coal slime is sticky waste produced in the coal washing and dressing process, and the fixed carbon content of the coal slime is 30-52%. The invention further provides a processing method of the low-sulfur and environment-friendly coal. In-place optimization of the semi coke powder is achieved, resource utilization is achieved for coal slime solid waste, and pollution caused by the waste to the environment is reduced. The total sulfur of briquette coal is smaller than or equal to 0.4, smoke and SO2 emission can be effectively reduced in the combustion process of briquette coal, and pollution to the atmosphere is reduced.

The invention discloses a biomass fuel boiler with a rotatable fire grate. The biomass fuel boiler comprises a furnace body, wherein the furnace body comprises a first furnace body and a second furnace body which are arranged in a sleeved mode; the rotatable fire grate, wherein the rotatable fire grate is vertically arranged in the first furnace body in a rotating mode through a rotating shaft, the rotatable fire grate comprises multiple fuel trays, and the fuel trays are sequentially arranged in the axial direction of the rotating shaft at intervals; a pair of fins, wherein the pair of fins are spirally and symmetrically arranged on two sides of the rotating shaft, and sequentially penetrate through the multiple fuel trays; and pneumatic biomass powder feeding pipes, wherein one ends of the pneumatic biomass powder feeding pipes penetrate through the furnace body and extend to be opposite to the fins. A biomass particle feeding hole is formed in the top part of the furnace body; a mode water cooling wall is arranged on the side wall of the furnace body; a slag collecting tank is detachably arranged at the bottom part of the rotatable fire grate; multiple circulating ports are annularly and uniformly arranged on the side wall, close to the first furnace body, of the bottom of the second furnace body at intervals; and the biomass fuel boiler further comprises a smoke outlet anda base. According to the biomass fuel boiler, biomass powder and biomass particle fuel can be fully mixed and combusted, combustion is sufficient, the heat utilization rate is high, and energy-savingand environment-friendly effects are achieved.

The invention provides a microwave plasma pyrolysis gasification technology, and relates to the technical field of garbage decomposition gasification. The microwave plasma pyrolysis gasification technology and application thereof comprise the following steps: S1, conveying to-be-treated garbage into a preheating drying tower for pre-drying treatment; s2, transporting the pre-dried garbage into a microwave plasma cracking treatment device through a propelling device; s3, cracking, by the microwave plasma cracking treatment device, the garbage in a vacuum environment for gasification; s4, introducing the generated gas into a gas purification device through a special channel for secondary cracking purification; and S5, extracting and recovering the gas after secondary cracking through an airextracting pump to obtain a product after garbage gasification. Through the microwave plasma pyrolysis gasification technology provided by the invention, the plastic garbage can be completely decomposed and gasified and converted into useful gas to be recycled; in addition, the recycled gas does not contain harmful substances, so that the technology is very environment-friendly.

A continuous negative pressure carbonization apparatus includes a material feeding device, a carbonizing chamber and a material collecting device. The material feeding device feeds the raw material. The carbonizing chamber receives and carbonizes the raw material and it includes a carbonization device and two buffering devices. The carbonization device has a carbonization chamber. The carbonization chamber has a material inlet and a material outlet. The buffering devices are respectively mounted and connected to the material inlet and the material outlet. The material collecting device collects the carbonized product from the carbonization chamber. When the raw material is carbonized in the carbonization chamber, the pressure of the carbonization chamber is kept at a negative pressure state smaller than the atmospheric pressure.

Solid waste that includes a mixture of wet organic material and dry organic material can be are separated using mechanical separation to produce a wet organic stream enriched in wet organics and a dry organic stream enriched in dry organics. The separated wet organic stream and dry organic stream are separately converted to renewable or recyclable products using different conversion techniques particularly suited for the separated wet and dry organic streams.

The invention discloses a method for reducing porosity of a surface coating of a neodymium iron boron permanent magnet material, belonging to the field of surface treatment of sintered neodymium ironboron permanent magnet materials. The method is characterized by comprising the steps of 1) deashing a neodymium iron boron permanent magnet material; 2) soaking the neodymium iron boron permanent magnet material in a sealant, and then carrying out water washing, wherein the sealant is an alcohol amine compound; 3) sequentially cleaning the wahsed neodymium iron boron permanent magnet material through an oil removal agent and an acid; and 4) activating the neodymium iron boron permanent magnet material, and then carrying out electroplating. According to the method for reducing the porosity ofthe surface coating of the neodymium iron boron permanent magnet material, hole sealing treatment is carried out before electroplating, water is sucked into gaps through capillary action, and oxide inthe gaps generates hydrated oxide through hydration, so that the volume of the oxide is increased, and the gaps are sealed; and furthermore, the porosity of the coating can be reduced, the coating isrelatively smooth and bright, and the magnetic flux loss of the magnet can be reduced.

A preignition chamber with surrounding air suitable for a rotational flow pulverized coal burner relates to the technical field of coal powder boilers. The invention aims to solve the problems of easiness in ash accumulation and easiness in slagging of the existing preignition chamber, so as to ensure long-term stable operation of the preignition chamber. The preignition chamber comprises a preignition chamber and a plurality of surrounding air nozzles, the rotational flow pulverized coal burner is arranged in the middle of the bottom end of the preignition chamber, a plurality of surroundingair nozzles are uniformly distributed in the bottom end of the preignition chamber along a circumferential direction, the surrounding air nozzles are inserted in the bottom surfaces of the preignitionchamber, the inside ends of the surrounding air nozzles are tightly attached to the inner drum wall of the preignition chamber, and gas is conveyed in the surrounding air nozzles. The invention is suitable for the rotational flow pulverized coal burner.

The invention relates to a distributed low-temperature plasma tubular accelerator straw fertilizer manufacturing machine, which comprises a high-temperature field sedimentation furnace, high-temperature plasma accelerators, a sealed water tank and a distributed low-temperature plasma tubular accelerator, wherein the high-temperature field sedimentation furnace is provided with a straw powder feeding hole, a tail gas discharging hole and an ash discharging hole; the flame nozzle of each high-temperature plasma accelerator communicates with the hearth of the high-temperature field sedimentationfurnace; the sealed water tank is provided with a liquid feeding and discharging valve and an air outlet and is filled with a preset water level of aqueous solution; the distributed low-temperature plasma tubular accelerator is used for manufacturing the tail gas of the high-temperature field sedimentation furnace into soluble fertilizers, and the soluble fertilizers are dissolved in the aqueous solution in the sealed water tank; and a condenser is arranged between the tail gas discharging hole and the sealed water tank. The hearth of the high-temperature field sedimentation furnace formed bythe high-temperature plasma accelerators generates a high-temperature even thermal force field; when straw powder particles fall to the high-temperature even thermal force field, the straw powder particles are instantaneously gasified, ashes sink to form soluble macroelement, medium element and trace element fertilizers, the tail gas is processed by the distributed low-temperature plasma tubular accelerator, nitrogen and sulfur gases condense and fall into water, and macroelement and medium element fertilizers are formed.