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236results about How to "Equipment is small" patented technology

In-situ injection of soil and groundwater - high pressure rotary jet grouting in-situ remediation system and method

An in-situ injection of soil and groundwater—high pressure rotary jet grouting in-situ remediation system and method. The system has an agent dispensing station, high pressure grouting pump, air compressor, rotary jet grouting drilling machine, second double-pipe water flow joint, automatic lifting mechanism for grouting drill pipe of rotary jet grouting drilling machine, high pressure jet drill pipe, inner tube for high pressure jet triple drill pipe, outer tube for high pressure jet triple drill pipe, agent jet nozzle, an air jet nozzle, cemented carbide block and a drill bit. Parameters are arranged according to the triangle method to ensure that the remediation area is covered within the diffusion radius of the agent. After positioning the GPS measuring point, a guided-boring rig is positioned at the center of the injection point. The high pressure injection remediation uses a double-pipe: using gas and liquid fluids to spread the soil while cutting the soil from bottom to top to achieve thorough mixing of the remediation agent with soil and groundwater; quickly combining laboratory testing to obtain parameters for remediation agent residues, pH values, and contaminant concentrations to verify the in-situ remediation effect and monitor the residual agent.
Owner:BCEG ENVIRONMENTAL REMEDIATION CO LTD

Wastewater advanced treatment equipment and method for catalytic ozonation membrane reactor

The present invention relates to wastewater advanced treatment equipment and a method for a catalytic ozonation membrane reactor and belongs to the field of wastewater treatment. The method comprises the steps of pretreating to-be-treated organic wastewater by means of a pre-processed filtering device and then leading the organic wastewater to one side of the catalytic ozonation membrane reactor; leading the ozone-containing gas to the other side of the membrane reactor at the same time; diffusing the ozone to the wastewater side through a hollow fiber membrane in the membrane reactor; and initiating the catalytic oxidation reaction between the surface of the membrane with a catalytic function layer and organic compounds in the wastewater. The above catalytic ozonation membrane reactor is immersed type and the membrane thereof is in the form of an oxidation-resistant hydrophobic hollow fiber organic catalytic membrane. The catalytic function layer of the membrane is at the surface of the membrane. Heterogeneous catalyst articles are adopted as the load. By means of the method, degradation-resistant industrial wastewaters in the fields of dyes, petrochemical engineering, pharmaceuticals and the like can be effectively treated. Meanwhile, the size of the reactor is reduced, and the length of the process route is shortened. The ozone transfer and the oxidation rate are increased. Moreover, the loss during the ozone transfer and reaction process is reduced.
Owner:RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI

Multi-stage drying method of sludge utilizing compressed secondary steam

The invention relates to a multi-stage drying method of sludge utilizing compressed secondary steam. In the existing drying methods, energy consumption is high and efficiency is low. The method provided by the invention comprises the following steps: firstly uniformly mixing dewatered sludge with oil in a weight ratio of (1-20):1 to obtain oily sludge, and then drying the oily sludge by utilizing secondary steam, separating oil and dry sludge from the dried oily sludge, and recycling the separated oil used as a raw material for the mixed oily sludge. The oily sludge is dried by a multi-stage dryer composed of 2-5 dryers connected in series; an external heat source is utilized by one of the dryers; and secondary steam is utilized by the remaining dryers, specifically saturated secondary steam is separated from the secondary steam generated in the drying process and compressed into superheated steam, and the superheated steam is introduced into heating chambers of the dryers to be used as a heat source. In the multi-stage drying method provided by the invention, the heat energy of the secondary steam is sufficiently utilized, and the energy consumption of the drying system is greatly reduced; and no dust entraining exists in the drying process, so that the heat transfer surface of the drying device is maintained clean, and the drying efficiency is high.
Owner:HANGZHOU DIANZI UNIV +1

A signal optical power detection device and detection method

The invention relates to a signal light power detection instrument and a detection method, the instrument is used to detect the power of a light signal transmitted in an optical network, wherein, a noise source exists in the optical network and the instrument is positioned at the receiving terminal in the optical network and includes: a photoelectric conversion and amplifying device, which is used to receive the light signal, convert the signal into an electrical signal and to amplify the electrical signal; a filter circuit, which is used to receiving the amplified electrical signal, to conduct high-pass filtering to filter the low frequency noise in the amplified electrical signal, and to output a high-frequency signal; and a high-frequency power detection circuit, which is electrically connected with the filter circuit, used to detect the power of the high-frequency signal to determine whether a high-frequency signal is available and/or the power value of the high-frequency signal. By making use of the filter circuit and conducting detection at the receiving terminal, the invention doesn't need establish a protocol among nodes, and doesn't need special light modulation technology. The invention has the advantages of strong adaptability, small instrument volume, low cost and fast scanning velocity, and can realize the same signal detection effect depending on the actual stateof different systems.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO

Self-driving tour control system and method based on unmanned plane

The invention belongs to the distance measurement navigation application and unmanned plane technology field and discloses a self-driving tour control system and method based on an unmanned plane. The system comprises a user terminal, a vehicle roof rising and landing platform and an unmanned plane terminal. According to the system, unmanned plane high precision position determination is realized through multi-point optimization configuration UWB high precision distance measurement, an unmanned plane docking platform is constructed, autonomous docking of the unmanned plane is realized, and autonomous flight is further realized; based on the docking platform, intercommunication between the platform and a handset is further realized, and intercommunication of data and images acquired by the unmanned plane with the user handset is realized; through a connection function between the platform and the handset, accurate landing, cruising and destination picture taking of the unmanned plane can be accurately commanded by a user through a handset map; autonomous charging of the unmanned plane can be realized through platform docking. The system is advantaged in that the required equipment volume is smaller, mass is lighter, power consumption is lower, improvement of travel experience of a driver can be facilitated, and self-driving tour contents are enriched.
Owner:XIDIAN UNIV

Device and method for monitoring neutral point earthing of secondary winding of electric power current and voltage mutual inductor

The invention provides a device and method for monitoring the neutral point earthing of a secondary winding of an electric power current and voltage mutual inductor. The device comprises a detection amplification module, a judgement processing module, a control circuit and an alarming circuit, wherein the detection amplification module is used for detecting and amplifying a current in the neutralpoint earthing wire of the secondary winding of an electric power current and voltage mutual inductor; the judgement processing module is used for judging whether the amplified current reaches an alarming current threshold value; if the amplified current reaches the alarming current threshold value, a control circuit switch is triggered to be closed; the control circuit comprises the control circuit switch and an alarm starting unit, the control circuit is conducted when the control circuit switch is closed, and the alarm starting unit triggers an alarming circuit switch to be closed; the alarming circuit comprises the alarming circuit switch and an alarm indicator light; and when the alarming circuit switch is closed, the alarming circuit is conducted, and the alarm indicator light is lightened. According to the device and the method provided by the invention, the neutral point earthing condition of the secondary winding of an electric power current and voltage mutual inductor can bemonitored in real time, the device gives out an alarm in time if multiple-point earthing is found, and maintenance staff are notified to process the earthing condition, thereby the potential safety hazard is eliminated.
Owner:SHENZHEN POWER SUPPLY BUREAU
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