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978results about How to "No accumulation" patented technology

Non-contact photoelectric measurement method and device for bunker coal position

The invention provides a non-contact photoelectric measurement method and device, which obtains the depth value of materials in a bunker on the basis of the number of pixels between a laser facula imaging spot and an image center spot in an image, belonging to the technical field of material position measurement. The invention is especially suitable for measuring the depth of the bunker coal position. In the device of the invention, a digital camera and a laser emitter are fixed on the top of the principal axis of a barrel-shaped bunker, so that the light path of the camera is vertical to the surface of material. The laser emitter is arranged on the position at the angle theta with the horizontal direction so as to ensure that the imaging zone of the laser facula can be projected on the material surface within the field range of the camera. The camera focuses by N-gear segment so as to satisfy the situation that clear images can be shot on all different coal positions of the bunker. DSP (Digital Signal Processor) serves as the inner core of a processor. The number of pixels between the laser facula imaging spot and the image center spot is calculated, and a depth table which is calibrated in advance and corresponds to different pixel number mean values is inquired to finish depth detection. The measurement device is composed of the digital camera, the laser emitter, the image processor and a real-time display module.
Owner:CHINA UNIV OF MINING & TECH (BEIJING)

Hydraulic driven built-in rotation scraping type pipeline cleaning device

Disclosed is a hydraulic driven built-in rotation scraping type pipeline cleaning device. A main guide plate and an auxiliary guide plate are adopted to form a one-way pressure relief structure, the operating posture of a spindle on the inner central line of a pipeline is maintained through the guide plates, a sealed impeller and a positioning support frame, fluid kinetic energy is used for driving the impeller to drive a pipeline cleaning cutter to clean the pipeline circumferentially in the pipeline, meanwhile, a rim working portion of the composite pipeline cleaning cutter combining effective functions of various pipeline cleaners is further kept in the maximum and optimal contact with the inner wall of the pipeline, the axial portion adopts an alloy grinding head to remove large-particle dirt and metal scaling bonded on the inner wall of the pipeline, the kinetic energy of fluid is used for driving the pipeline cleaning cutter to work, the pipeline can still be in a normal operation state, cleaned dirt can be carried by the fluid quickly and cannot accumulate, and choking of the pipeline can be avoided. The pipeline cleaning device is compact in structure, convenient and flexible, safe and durable, high in popularity, simple to operate, convenient to implement, energy saving, high in cleaning speed, long in cleaning distance and free of damage to the pipeline wall.
Owner:钟平贵

Biodegradable coated carbamide and preparation method thereof

The invention relates to coated carbamide, in particular to a totally biodegradable coated carbamide and a preparation method thereof. The coated carbamide consists of a coated layer and a carbamide core. The main body of the coated layer is polylactic acid and / or polybutylene succinate. The coating process adopts fluidized bed spraying-coated technology, and comprises the following steps: dissolving polylactic acid and / or polybutylene succinate in trichloromethane, adding carboxymethylcellulose, organic and / or inorganic conditioner, urease and / or nitrification inhibitor in the solution, spraying and coating the surfaces of the fluidized carbamide after uniformly mixing the mixture under the stirring of a stirrer to form the uniform and complete organic polymeric membrane layer. The process has the advantages of easy implementation, and capacity of effectively slowing down the release of the nutrient to the outside and the conversion rate of nitrogen in soils, effectively controlling the release of the nitrogen nutrient in soils, and reducing the pressure on environment caused by the rapid release of nutrient. The coated material can be totally biodegradable, and the degradation products have no secondary pollution to the environment.
Owner:SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI

Advanced nitrogen and phosphorus removal device and process control method thereof

ActiveCN101570383ARealize denitrification and dephosphorizationBreaking through the bottleneck that is difficult to improve the efficiency of nitrogen and phosphorus removalTreatment with aerobic and anaerobic processesMultistage water/sewage treatmentLine sensorWater quality
The invention relates to an advanced nitrogen and phosphorus removal device and a process control method thereof, belonging to the technical field of biological sewage treatment by using a biochemical method. Aiming at the defects that the existing A / O step feed technology can not synchronously have advanced biological phosphorus removal, reverse A / O technology is high in energy consumption and complicated in operation and the like, the invention combines the reverse A / O technology and the step feed technology, nitrification liquid internal reflux does not needed to be set, a first section is provided with an anaerobic reactor, anoxic reactors at a second section and a third section are respectively installed on an ORP on-line sensor and a nitrate on-line sensor, and data obtained by collecting ORP and nitrate in an on-line way can be taken as input of a process controller, is output by fuzzification treatment and can act on opening and closing a frequency converter of an actuating mechanism and an external carbon source dosing metering pump so as to save the external carbon dosage. The invention can greatly improve the denitrification effect of the step feed technology, utilizes carbon source of raw water to the utmost extent, realizes synchronous nitrogen and phosphorus removal, and has the advantages of simple control structure and stable quality of yielding water.
Owner:BEIJING UNIV OF TECH

Casting carrying and separating equipment

PendingCN111776686ARealize automatic feeding processOrderly arrange the dischargeConveyor partsGear wheelWorkbench
The invention relates to the technical field of casting separation, in particular to casting carrying and separating equipment. The casting carrying and separating equipment comprises a supporting frame. A workbench is installed at the top of the supporting frame. A feeding mechanism is installed at one end of the workbench and comprises a fixed frame plate, two conveying rollers, a conveying beltand a transmission gear. An installation seat is installed at the output end of the conveying belt and is fixedly connected with the top of the workbench. A material separating mechanism is installedon the inner side of the installation seat and comprises a material separating disc. A rotary shaft is fixedly installed at the bottom of the material separating disc. A rotary seat is fixedly installed at the bottom end of the rotary shaft. A plurality of butt joint grooves are formed in the outer extending part of the rotary seat. A rotary disc is arranged on the outer extending part of the rotary seat. The bottom of the rotary disc is fixedly provided with a fixed plate. One end of the top of the fixed plate is fixedly provided with a lug. By means of the equipment, perfect cooperation ofautomatic feeding, automatic separating and automatic discharging of castings is achieved, the manual labor amount is greatly saved, the castings can be arranged and discharged in order, and accumulation is avoided.
Owner:林素芹

Chemical absorption and microbial fuel cell combined synchronous flue gas desulfurization and denitration technology

The invention provides a chemical absorption and microbial fuel cell combined synchronous flue gas desulfurization and denitration technology, and belongs to the field of industrial flue gas treatment. According to the characteristics of a microbial fuel cell, the regeneration regularity of a complexing agent in the complexing absorption-biological reduction denitration process and conversion of sulfate in the biological flue gas desulfurization process, SO2 and NOx in flue gas are sequentially absorbed by an alkaline solution and a Fe(II) solution, then desulfurization and denitrification washing solutions enter an anode chamber and a cathode chamber of a built double-chamber MFC respectively, desulfuration is achieved to generate sulfate bioconversion and generate elemental sulfur in the anode chamber, electrons generated by an anode are fed into a cathode through an external circuit, and biological reduction of Fe(II)-NO and Fe(III) generated by complexing denitration and regeneration of Fe(II) are achieved in the cathode chamber. The washing agents absorbing SO2 and NOx in flue gas synchronously achieve biological sulfate reduction, biological sulfide oxidation to generate elemental sulfur and biological regeneration of a complexing denitrification solution through an MFC system.
Owner:DALIAN UNIV OF TECH

System and method for adjusting indoor temperature

The invention discloses a system and method for adjusting the indoor temperature. The method is as follows: when the outdoor temperature is low, outdoor air is used as a heat exchange medium: the outdoor air is led into a gas guidance pipeline which is buried underground at a certain depth, the air temperature in the pipeline is adjusted by using the soil temperature around the gas guidance pipeline, and the cooled air in the pipeline is delivered to the interior, so that the cooled low-temperature air is utilized to directly cool the indoor high-temperature; and when the outdoor temperature is high, the outdoor air is not used as the heat exchange medium any longer, and cooling is carried out by an inner circulation mode, the indoor low-temperature air is fed back to the underground pipeline for cooling again, and later, the cooled low-temperature air is led into the interior. By using the inner circulation mode, outdoor air with a high temperature does not need to be led in all the time to serve as a heat exchange medium, thus, load can not be brought to the underground soil, excess heat accumulation is not generated, and the heat exchange efficiency of the system is improved inno need of utilizing underground water and surface water resources, thereby omitting air conditioners.
Owner:CHINA MOBILE GROUP SICHUAN

Water-bearing rock stratum borehole wall structure and construction method

ActiveCN105201514AImprove compactness and bond strengthHigh radial stiffness and bearing capacityShaft liningPre embeddingEnvironmental geology
The invention discloses a water-bearing rock stratum borehole wall structure and a construction method and belongs to a borehole wall structure and a construction method. The borehole wall is formed by an anchor pull rod I, an anchor pull rod II and a steel frame which are fixed on the surrounding rock, and concrete poured in a whole net frame to form a cylindrical borehole wall. The construction method comprises the following steps: manufacturing the anchor pull rod I and the anchor pull rod II on the surrounding rock body; then binding the borehole wall steel frame, connecting the anchor pull rod I and the anchor pull rod II with the steel frame, and connecting a pre-embedded grouting pipe; subsequently mounting a template and pouring the concrete; dismounting the template from the borehole wall and after the borehole wall reaches a certain strength, applying pre-tightening force to the anchor pull rod II by screwing an end nut; and finally grouting slurry via the pre-embedded grouting pipe in the anchor pull rod II, filling slurry liquid in holes in an interface between the borehole wall and the surrounding rock body through slurry transmission holes, and switching off a valve after finishing grouting the slurry. The water-bearing rock stratum borehole wall structure has the advantages that due to the fact that the borehole wall and the surrounding rock bear together, the radial stiffness of the borehole wall is improved, the accumulation of high-pressure water on the external surface of the borehole wall is avoided, and the structure has higher bearing force than that of a structure with the same section size and material, so the construction cost is greatly reduced, and the safety is improved.
Owner:CHINA UNIV OF MINING & TECH
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