58results about How to "Guarantee long-term safe operation" patented technology

The invention relates to a method for examining and managing a thermodynamic system, which comprises the following main steps: scanning information of an examiner, inquiring records of an examining spot, inquiring an examining route, inquiring an examining position and equipment and recording data. Firstly, the information of a job number or a bar code of a working card of the examiner is scanned by a bar code scanner; secondly, the history records of the examining spot are inquired, if no examining spot is found, a prompting message is given, and if the examining spot is found, parameter details are displayed according to a reverse order mode of examining time; thirdly, the examining route is inquired, and the examined examining position is displayed on a display screen; fourthly, the examining position and the equipment are inquired; and finally, a bar code of the examining position is scanned by the bar code scanner to record the data. The invention has simple principle, safe and reliable operation, high degree of automation and wide application range.

The present invention relates to a submerged pipeline fixing contruction method and its equipment. Said method includes the following steps: firstly, prefabricating fixing equipment in plant, transporting it to seaside field and assembling it and fixing pile pipe into one body, shipping and transferring them to place, using floating crane to lift the piling machine, fixing device and fixing pile pipe together and make the fixing pile pipe come into centering guide, and using asdic method to guide the centering guide accurately be in place, using piling machine to drive fixing pile pipe into sea-bed and make fixing equipment be in place and fixing floating part of the pipeline. Said invented equipment includes hydraulic vibration piling machine, pile pipe centering guide, fixing equipment, fixing pile pipe and others.

The invention discloses a mixed-coal blending combustion prediction system with a post-evaluation system. During mixed-coal blending combustion of various kinds of coal in a power plant, design parameters, structure features and fuel feature data of the power plant are combined to pre-judging a blending combustion scheme for configuring different kinds of coal and blending combustion proportions for a unit, so burning tests can be reduced, environmental protection and safety risks are avoided and operation economy of the unit is improved. Post-evaluation is performed on the scheme about the mixed-coal blending combustion prediction suggestion through operation data of actual blending combustion to verify whether the scheme is feasible. According to the invention, proper, simple and effective decision technical support is provided for research of mixed coal blending combustion of a target power plant and theoretical and application foundation is laid for the development of the mixed-coal blending combustion technology.

The invention relates to an all-backheating drainage system of a heat supply network heater for a supercritical concurrent boiler thermal power plant. Condensed water in a condenser passes through a shaft seal cooler of a condensed water system and then enters into a condensed water precision processing device; a drainage water cooling section is arranged in the heat supply network heater, and drainage water in the heat supply network heater is cooled by the drainage water cooling section; the cooled drainage water is boosted by a drainage pump, then passes through a drainage water cooler and exchanges the heat with condensed water from the condensed water precision processing device in the drainage water cooler; the heat-exchanged drainage water and the condensed water from the shaft seal cooler of the condensed water system are mixed to enter the condensed water precision processing device; and the condensed water from the condensed water precision processing device returns to the system after heat exchange, therefore, the desalting of more than 80 percent of a unit steam-water system through a chemical processing system is ensured, the boiler feedwater quality is ensured, and the long-term safety operation of a supercritical concurrent boiler and the heat exchange between the drainage water of the heat supply network heater and the heat supply network are also ensured; and compared with schemes of partially recovering the heat and then discharging the heat to the condenser, the invention improves the efficiency by a larger extent.

The invention discloses a desulfurizing denitration defluorination dust particle removing device for flue gas in a coal-fired boiler, which comprises a lime water adding device, an automatic control system for catalyst, an automatic filter press and a tank body; the upper part of the tank body is spaced into three reaction chambers and a demisting chamber by a demarcation strip; on the tank body, a flue inlet and a flue outlet are arranged on the tank body; a channel is arranged between the reaction chamber and the demisting chamber; the lower part of the tank body is provided with a reaction fluid storing chamber and a demisting and defluiding chamber; a cycling pump is arranged outside the tank body, and is respectively communicated with nozzles arranged at the top of the reaction chamber by a fluid conveying tube; sewage draining exits are arranged at the lower ends of the reaction liquid storing chamber and the demisting and defluiding chamber; a cycling pool is arranged below the sewage draining exits; a cycling pump is arranged outside the cycling pool and is communicated with the reaction liquid storing chamber and demisting chamber; an oxidation pool is arranged below the cycling pool and is communicated with the filter press; the cycling pump is arranged outside the demisting and defluiding chamber and is communicated with the nozzles arranged above the demisting chamber. The desulfurizing denitration defluorination dust particle removing device can simultaneously desorb four pollutants in flue gas-fume, SO2, NOx and fluoride, and solves the problem that the function is single in the prior art.

An oil-immersed type high-overload power transformer is provided with an open transformer box body. A sealed cover plate is arranged above the box body. A transformer core is arranged in the box body. The oil-immersed type high-overload power transformer is characterized in that organic high-temperature-resisting paint is sprayed on the inner surface and the outer surface of the box body, a sealing cushion made of fluororubber is embedded between an opening edge on the upper portion of the box body and the sealing cover plate, dimethyl silicone oil is arranged in the box body to be used as transformer oil, a cylindrical box body is fixedly arranged on the sealing cover plate of the transformer, a partitioning plate is arranged in the middle of the cylindrical box body, and the partitioning plate divides the whole cylindrical box body into an oil storage box and an expanding box in a partitioning mode. According to the structure, performance is stable, materials has high temperature resistance and corrosion resistance, continuous working time of an oil-immersed transformer under an overload situation is greatly prolonged, meanwhile, the expanding box is added, the problem that inner temperature of the transformer is too high, pressure is increased, and accordingly explosion happens can be avoided, and normal working operation of the transformer and the personnel safety of a using person are guaranteed.

The invention relates to a precise ammonia spraying device and a method for thermal power plant denitration SCR reactors. The precise ammonia spraying device comprises a flue gas extraction and analysis system and an ammonia spraying grid partitioning system; the flue gas extraction and analysis system comprises a sampler; the sampler is connected with a sampling branch pipe; an analysis branch pipe is derived from the sampling branch pipe and is designed to stretch into an analyzer; an ammonia spraying grid subarea comprises an ammonia spraying main pipe, the ammonia spraying main pipe is divided into ammonia spraying subarea branch pipes, ammonia flowmeters and subarea leveling valves are arranged on the ammonia spraying subarea branch pipes, and the subarea leveling valves are connectedwith bypass subarea leveling valves in parallel; measurement data obtained by the flue gas extraction and analysis system is used for adjusting ammonia spraying grid ammonia spraying amount. According to the precise ammonia spraying device and the method for denitration SCR reactors, the sampling measurement value can represent the average NOX concentration and NOX concentration distribution of the whole section, and the ammonia spraying amount automatically tracked by an SCR system is coincide with the ammonia spraying amount actually needed on site.

The invention relates to a connecting method of polyethylene composite tubes of a steel wire gauze framework. The method comprises the following steps of: processing a turnup at 90 degrees at the end of a pipeline and adding a metal sleeve on the outer surface at the pipe end; buckling the two integrally; and connecting the turnup at 90 degrees and the metal sleeve by a metal hoop to enhance the strength of the turnup at 90 degrees. In addition, when the pipelines are connected, the metal hoop further has the effect of enhancing the strength of sealing gaskets among the pipe ends, so that the pressure bearing capacity in the connecting part is improved, and the pressure bearing capacity in the connecting part is greater than that of the tube product.

The invention discloses an anti-freezing expansion system for a catenary strut foundation and a preparation process thereof, and belongs to the technical field of civil engineering. The anti-freezingexpansion system comprises tube bottom sleeves, a frost heaving steel tube, a rolling structure, a strut outer casing pipe, a strut, a flange and a gravel layer, wherein a spring is installed betweena spring joint at the bottom of each tube bottom sleeve and a spring joint at the lower end of the frost heaving steel tube; and the periphery of the springs and the bottom tube sleeves are filled with flexible filling bodies. The anti-freezing expansion system for the catenary strut foundation provided by the invention is reasonable in structure and convenient to install, has excellent anti-freezing and expansion capacity, also has extremely convenient self-recovery function, and can be used for a long time; and the anti-freezing expansion system for the catenary strut foundation is very suitable for alleviating the frost heave and thawing settlement phenomenon in a frozen soil region, for keeping the stability of the building foundation and the long-term operation safety of the system inthe frozen soil region, and very suitable for the anti-freezing expansion projects of the catenary strut foundation in the frozen soil region.

The invention discloses a continuous packaging production process and in particular relates to a continuous nitrocotton packaging production process. The continuous nitrocotton packaging production process through which the occupied volume of the nitrocotton is reduced during packaging comprises the following steps of: dehydrating nitrocotton slurry or dewatering nitrocotton slurry through alcohol substance replacement; conveying the nitrocotton to a metal detector by utilizing a conveying mechanism, and removing metals mixed in the nitrocotton by utilizing the metal detector; feeding the nitrocotton in which the metals are removed into a tablet press for pressing tablets; and finally, packaging the pressed nitrocotton. Because the nitrocotton is pressed before packaging, the apparent density of the nitrocotton is improved, so that the occupied volume is greatly reduced during packaging, the more nitrocotton can be accommodated in the packaging structure with the same specification; and therefore, the storage and transportation cost is saved.

The invention discloses a solid-state oxygen control device. The device comprises a container, a flow rate adjusting unit and a replenishment mechanism, wherein a dissolution chamber for holding leadoxide pellets is arranged in the container, and an inlet and an outlet which are communicated with the dissolution chamber respectively are formed in two ends of the container; the flow rate adjustingunit is arranged on the container and used for controlling the flow rate of a coolant in the container; the replenishment mechanism is connected with the dissolution chamber to replenish the lead oxide pellets for the dissolution chamber. By means of the arrangement of the replenishment mechanism and a return pipe, the problem that current solid state oxygen control cannot realize online replenishment is solved, high-power oxygen supply of a reactor device and online replenishment of the lead oxide pellets are realized, the concentration of oxygen in the coolant can be accurately controlled,so that a layer of dense oxide film is formed on the surface of steel, lead-based alloy is prevented from further penetrating into the steel, an anticorrosion effect is realized, key technical difficulties of a lead-based fast reactor or an ADS system are overcome, and long-term safe operation of an experimental loop and the lead-based fast reactor is ensured.

The invention discloses a dynamic change balance compensation device for a traction elevator and a dynamic change balance compensation method. The dynamic change balance compensation device comprisesa lift car; a hoist rope is connected to the lift car, wound on a traction wheel and a beam pulley and then is connected to a counterweight device; the traction wheel and the beam pulley are fixed ina machine room of the top layer of the elevator room; a first liquid tank is arranged at the bottom of the counterweight device and is connected to a conveying pump through a connecting pipe; the conveying pump is further communicated with a second liquid tank, and the second liquid tank is fixed to the side shaft wall of the counterweight device; a first directional control valve and a second directional control valve are arranged at the end, close to the first liquid tank, of the connecting pipe and the end, close to the conveying pump, of the connecting pipe correspondingly; and the conveying pump, the first directional control valve and the second directional control valve are electrically connected to a controller respectively. According to the dynamic change balance compensation device and the dynamic change balance compensation method, a dynamic change compensation balance technology is utilized, so that the daily operation mode of the elevator is a favorable operation mode, thestarting current and the running current of the elevator are greatly decreased, so that the operation of the elevator can be more stable and energy-saving, and therefore the practicability is good, and the device and the method are worthy of popularization.

The invention provides a backpack type steel belt elevator. Car doors are arranged on the rest three vertical surfaces, except from the vertical surface connected to a bracket, of a car, so that taking comfort of an elevator is good, and long-term safe operation of the elevator is guaranteed. The backpack type steel belt elevator comprises the car, and a backpack frame, and further comprises a tractor which is positioned on the top of the well, wherein the backpack frame comprises a top horizontal frame, and a perpendicular vertical type frame; the top horizontal frame is fixedly connected with the perpendicular vertical type frame; the top of the car is fixedly connected with the top horizontal frame; a well, which corresponds to the corresponding surface of the perpendicular vertical type frame, is fixedly equipped with two groups of guide rail brackets which are arranged in a spaced mode; first guide rail structures are separately arranged at the outer sides of each group of the guide rail brackets; a corresponding stand column of the perpendicular vertical type frame is in blocking connection with a corresponding first guide rail structure through a guide shoe; second guide rail structures are separately arranged at the inner sides of the guide rail brackets; the two sides of a counterweight device are in blocking connection with corresponding second guide rail structures through perpendicular guide slots separately; and the counterweight device is positioned in the well.

The invention provides a self-stress and self-leveling grouting material for equipment. The grouting material consists of main materials and auxiliary materials, wherein the main materials comprise 30-45% of cement, 10-25% of mineral admixture and 35-45% of river sand, and the mineral admixture consists of pulverized coal ash, mineral powder and river sand powder which are in the mass ratio of (0.6-1.0): (1.6-2.0): (0.6-1.0); and the auxiliary materials comprise an expansion agent composition, a water retention thickener, an early strength agent and a powdered polycarboxylic acid water reducing agent and contain the ingredients in percentage by mass based on the sum of mass of cement and mineral admixture sequentially: 4%-8% of the expansion agent composition, 0.01%-0.05% of the water retention thickener, 2%-4% of the early strength agent and 0.2%-0.4% of the powdered polycarboxylic acid water reducing agent, wherein the expansion agent composition consists of rice hull ash, MgO and a UEA expansion agent which are in the mass ratio of (0.6-1.0): (0.6-1.0): (1.5-2.0), the water retention thickener is sodium alginate, and the early strength agent consists of gypsum powder, sodium carbonate and silica fume which are in the mass ratio of (0.8-1.0): (0.5-1.0): (0.6-1.0).

The invention discloses an offshore wind turbine foundation which is fixed into pipe columns with openings. The offshore wind turbine foundation comprises a first body, a connecting plate and a second body which are sequentially arranged from top to bottom. One side of the connecting plate is connected with the first body, and the other side of the connecting plate is connected with the second body. The ends, away from the connecting plate, of the second body extend into the openings and are connected with the pipe columns. When the pipe columns are deflected from the preset installation position and the deflection of the pipe columns exceeds the permitted construction error, the second body can be deflected from the connecting plate by a certain degree so that the second body can be smoothly inserted and fixed into the pipe columns. The offshore wind turbine foundation is simple in structure and high in operability, the situation that the deflection permitted column sinking error is large can be rapidly remedied, the smooth installation of the offshore wind turbine foundation can be ensured, and the offshore construction installation efficiency and reliability are improved; the pipe columns which are large in construction error do not need to be specially processed, and the economic benefits of the offshore wind turbine foundation are good.

The invention discloses a seamless switching circuit for a three-phase full-automatic alternating-current electricity-saving device. The circuit comprises a main circuit and a control circuit; functions of the three-phase full-automatic alternating-current electricity-saving device, such as energy saving, voltage stabilizing and high power supply quality, are realized by adopting technological means, such as seamless switching, three-phase balance, intelligent voltage adjustment and automatic capacity adjustment; the main circuit is mainly composed of a voltage adjustor, a transformer and a switch; seamless switching of an electricity-saving device bypass and an energy-saving state is realized by reasonably controlling closing and disconnection sequences of the switch in the main circuit; the control circuit is composed of a switching circuit, a clock signal generation circuit and a switch driving circuit; a drive signal is output to drive the switch of the control circuit; and ordered closing and disconnection of the switch of the main circuit are controlled through the switch of the control circuit. The seamless switching circuit disclosed by the invention can be automatically switched to commercial power supply under conditions that load electricity consumption is influenced or the device is further destroyed due to the fact that the electricity-saving device is failed; therefore, energy-saving and non-energy-saving automatic seamless switching can be realized; and thus, the power supply safety and stability are ensured.