51results about How to "Reach recovery" patented technology

The invention belongs to the technical field of coal boiler flue gas emitting, in particular to an oxygen control and flame retardant system for secondary recycling coal boiler flue gas. The system comprises a coal-fired boiler, a warm-air pipe, a coal dryer, an exhaust duct, a gas exhausting chimney and a waste recovery pipe, wherein the exhaust emission mouth of the coal-fired boiler is connected to the air inlet of the coal dryer by the warm-air pipe, and the air outlet of the coal dryer is connected with the bottom mouth of the gas exhausting chimney by the exhaust pipe. And the gas exhausting chimney is provided with an electronic butterfly valve b, and an exhaust gas recycling mouth under the electronic butterfly valve b is placed on the side wall of the gas exhausting chimney, and the exhaust gas recycling pipe is connected with a furnace of the coal-fired boiler by the exhaust gas recycling pipe. The system realizes the oxygen control mode through taking back the CO2 recycling from the flue gas of the coal-fired boilers to the coal boiler, thereby preventing oxygen from entering the furnace to reduce the burning degree of the coal. Namely, there is no need to reduce coal and add slag. In this way, the workloads are reduced and the labor costs are saved.

The invention discloses an object digitized three-dimensional reconstruction system based on raster scanning. The object digitized three-dimensional reconstruction system based on the raster scanning comprises a management unit, a data collection unit, a data processing unit and a three-dimensional reconstruction unit. The management unit controls the work of the data collection unit, the data processing unit and the three-dimensional reconstruction unit. The data collection unit is used for collecting all-around image information of an object and transmitting the collected image information to the data processing unit. The data processing unit receives the image information and carries out denoising and compensation processing on the image information. The processed image information is further transmitted to the three-dimensional reconstruction unit. The three-dimensional reconstruction unit carries out position and direction calibration on the processed image information, the three-dimensional geometric structure of the object to be reconstructed is calculated by utilizing grating coding, and color texturing and material recover are carried out. Fine reconstruction of the object is carried out by utilizing the raster scanning equipment and software, and perfect revivification of the object on fineness, color and material aspects is achieved.

The invention discloses a treatment process for oil-contained sludge generated by oilfield wastewater treatment. The treatment process comprises the following steps: subjecting the oil-contained sludge to acidification deoiling treatment so as to obtain oil-reduced sludge; and subjecting the oil-reduced sludge to oxidation degradation treatment so as to obtain quantity-reduced oily sludge. The treatment process provided by the invention adjusts the oil-contained sludge in a range of neutral to weak acidity by utilizing acid, so a part of acid soluble inorganic matters in the oil-contained sludge is dissolved and corroded, and more importantly, crude oil adsorbed on clay can be desorbed and separated; thus, the purposes of recovering oil resources and improving oily sludge density can be easily achieved. Meanwhile, the treatment process provided by the invention can relieve cross-linking and adsorption states of high-molecular polymers, promotes oxidation degradation of polymers, facilitates to increasing migration space of free-state water molecules in the oily sludge, is favorable for solid-liquid separation of the oily sludge, and reduces energy consumption of centrifugal dehydration, thereby improving settleability of a solid phase in the oil-contained sludge and facilitating to realizing quantity reduction and even harmless discharge of sludge.

The invention relates to a purification method of a long-chain dicarboxylic acid, which comprises I, heating a terminated fermenting liquid for demulsification, filtering to obtain a fermenting clearliquid; II, stirring while adjusting pH of the fermenting clear liquid to acid level, adjusting pH to basic level, adding little surfactant, stirring for a while, and filtering to remove solid matters; III, adding activated carbon, stirring, decoloring, and filtering; IV, heating the clear liquid of step III for acidifying, cooling, filtering, and drying to obtain the finished long-chain dicarboxylic acid. Synergy of an acid, a base and a surfactant herein helps effectively reduce the nitrogen content in the bio-process long-chain dicarboxylic acid, so that a high-quality dicarboxylic acid isattained.