11results about How to "Improve unit efficiency" patented technology

The present invention belongs to the technical field of biomass gasification and co-combustion power generation, and specifically relates to a biomass gas cooling system. The biomass gas cooling system provided by the present invention includes a gas heat exchange device and a deoxygenation device, and also includes a gas heat exchange pipeline, which is arranged in the gas heat exchange device, the deoxygenation device is provided with a deoxygenation water tank, the deoxygenation device has a second liquid inlet and a second liquid outlet, the second liquid outlet of the deoxygenation device is connected to the first liquid inlet of the gas heat exchange pipeline through a first pipeline, and the second liquid inlet of the deoxygenation device is connected to the first liquid outlet of the gas heat exchange pipeline through a second pipeline. The biomass gas cooling system provided by the present invention solves the current complex method of using heat transfer oil and other media as intermediate carriers, and achieves the purpose of efficient cooling without causing tar condensation and blockage.

This utility model discloses a flat-jaw vise with accurate positioning and high positioning precision. The lower end of the fixed jaw is fixedly installed on one end of the base, and the support of the pushing mechanism is slidably and fixedly installed on the base. The lower end of the movable jaw clamping block is slidably installed on the base, with a movable jaw fixed at one end and a mounting hole at the upper end and a threaded hole I at the lower end of the other end. A steel ball mounting groove is formed on the U-shaped groove wall near the movable jaw. The upper surface of the L-shaped angle block is provided with an inclined surface, which is placed in the U-shaped groove of the clamping block. Its lower end is slidably installed on the base, and its inclined surface presses against the steel ball. A set screw threaded into the threaded hole I of the clamping block is pressed against the end face of the L-shaped angle block away from the movable jaw. The lead screw passes through the mounting hole of the clamping block and abuts against the end face of the L-shaped angle block away from the movable jaw. This utility model has a good inclined pressing effect, accurate positioning, good stability, and high positioning precision, which can meet the needs of high-precision machining of workpieces.

The utility model discloses a novel radiation heat exchange structure, which belongs to the field of boilers and comprises a platen superheater mixing header. The two platen superheater mixing headers are respectively arranged in front of and behind the boiler; and the platen superheater mixing headers are symmetrically arranged by taking the center line of the hearth as a reference. The novel radiation heat exchange structure disclosed by the utility model can ensure that the heat exchange of the heating surface is uniform, the deviation is small, production and manufacturing are not easy to make mistakes, the production difficulty is reduced, the unit efficiency is improved, the power generation cost is reduced, and the operation safety of the heating surface is ensured.

The utility model discloses a novel innovative structure for controlling thermal load deviation of a heat convection device, which belongs to the field of boilers and comprises a high-temperature superheater tube panel system and a high-temperature reheater tube panel system. And a high-temperature superheater tube panel system is arranged at the bottom of the high-temperature reheater tube panel system. According to the novel innovative structure for controlling thermal load deviation of the convection heat exchange device, the problem of thermal load deviation of an existing boiler is solved, the temperature of main steam of the boiler is increased by 5 DEG C, the temperature of a reheat steam outlet is increased by 2 DEG C, the efficiency of a unit is increased by about 0.2%, the efficiency of the unit is improved, and the power generation cost is reduced.

The invention relates to a three-stage expansion and three-stage pressurization hydrogen and methane expansion compressor unit for an ethylene unit, and belongs to the technical field of multi-stage expansion machines. Main shafts and compression end impellers in a first-stage expansion compressor unit, a second-stage expansion compressor unit and a third-stage expansion compressor unit are of the same structure, and molded line equations adopted by the expansion end impellers in the first-stage expansion compressor unit are Yfw = 0.0003406 Z < 3 + > 1.53 and Ybw = 0.0003468 Z < 3 + > 1.53; an expansion end impeller in the second-stage expansion compressor unit adopts a molded line equation that Yfw is equal to 0.0006002 Z < 3 + > 1.5, and Ybw is equal to 0.0006103Z < 3 + > 1.5; and an expansion end impeller in the third-stage expansion compressor unit adopts a molded line equation that Yfw is equal to 0.0006593 Z < 3 + > 1.46, and Ybw is equal to 0.0006694 Z < 3 + > 1.46. Through reasonable matching design of the impeller at the expansion end, the flow channel loss is reduced, and the unit efficiency is improved.

The invention provides a hot rolling oxide scale control method for a cover-withdrawing deep-drawing structural steel strip and the cover-withdrawing deep-drawing structural steel strip. By controlling a cooling mode in a hot rolling process and combining rough rolling, finish rolling and coiling processes, the thickness of an oxidation layer of the obtained steel strip is smaller than or equal to 11 microns, the oxidation layer structure is a proeutectoid Fe3O4 + eutectoid structure (Fe + Fe3O4) + FeO, the oxidation layer is free of a Fe2O3 phase, the proportion of the proeutectoid Fe3O4 is 70-80%, the proportion of the eutectoid structure is 10-20%, the proportion of FeO is about 10%, and obvious precracks exist in the oxidation layer structure. On the basis, during acid rolling, the acid pickling speed can be increased to 160-180 m / min, the defects that in an original technology, an oxide layer is not prone to being completely washed, and the defects of over-acid pickling and under-acid pickling are likely to be formed are overcome, the problem that the environment is polluted by acid pickling rime fog does not exist, and the steel belt obtained after acid pickling is excellent in surface quality and good in technical and economic index.

The evaporator single-pass flow path structure of the centrifugal refrigerator comprises an evaporator body, a first pipeline and a second pipeline are arranged on one side of the evaporator body side by side, a water passing hole is formed in the other side of the evaporator body, and the water passing hole is communicated with a water inlet assembly. A U-shaped double-flow single-end inlet and outlet mode in a traditional evaporator is changed into a single-flow mode of one-section water inlet of the water inlet assembly and one-end water outlet of the first pipeline and the second pipeline, so that the problem of pressure blockage of a centrifugal machine when the water flow is large can be solved, the flow of low-temperature water is increased, the energy consumption is reduced, and the unit efficiency is improved; and the traditional evaporator structure can be directly modified, so that the use cost is lower.

The present application belongs to the technical field of stator manufacturing, and particularly relates to a stator design method for integrated general fluid machinery and a general fluid module. The stator design method for integrated general fluid machinery comprises the following steps: 1) determination of an electric drive diameter; 2) determination of an effective electric drive length; and 3) determination of a pole pitch. Through the above operation process, the operation efficiency and stability of the general fluid module applying the stator can be effectively ensured or even improved. Another object of the present application is to provide a general fluid module applying the stator design method, so that through integrated design, the intermediate connecting frame and the number of vulnerable components and friction loss are reduced, thereby further improving the overall efficiency of the unit.

The application discloses a design method and a sealing structure of a straight-through labyrinth sealing structure based on an agent model optimization and a non-uniform distribution of sealing teeth, and relates to a design method and a sealing structure of a straight-through labyrinth sealing structure. In order to solve the problems that the existing labyrinth sealing optimization depends on complex structure changes or additional components, is high in cost and is not suitable for old unit reconstruction, and a non-uniform distribution lacks a systematic design method and mechanism guidance, the design method comprises the following steps: determining design variables and constraint conditions, wherein the design variables comprise an axial total length L, a tooth number n and an axial coordinate of a middle tooth; generating sample points by using a Latin hypercube sampling; obtaining a leakage amount by CFD simulation; constructing a Kriging agent model; and optimizing by using a genetic algorithm and iteratively verifying until the accuracy is met. The application belongs to the technical field of rotary machinery sealing.

The invention provides a hot-rolled oxide scale control method for a steel strip for a cover withdrawing flux-cored wire and the steel strip for the cover withdrawing flux-cored wire. According to the control method, through a specific cooling mode in a hot rolling process, soaking, rough rolling, finish rolling and coiling processes are combined, the thickness of an oxidation layer of the obtained steel strip is smaller than or equal to 10 microns, the oxidation layer structure is proeutectoid Fe3O4 + eutectoid tissue (Fe + Fe3O4) + FeO, the oxidation layer does not contain Fe2O3 phase components, the proportion of proeutectoid Fe3O4 is about 20%, the proportion of eutectoid tissue is about 70%, the proportion of FeO is about 10%, and obvious precracks exist in the oxidation layer structure. In acid rolling, the acid pickling process speed can be increased to 170-190 m / min, the defects that in an original process technology, an oxide layer is not prone to being completely washed, and over-acid pickling is prone to being formed are overcome, the problem that the environment is polluted by acid pickling rime fog does not exist, and the steel belt obtained after acid pickling is excellent in surface quality and good in technical and economic index.

The invention discloses a galloping early warning method for a wind turbine generator group in the same offshore wind field, and the method comprises the following steps: 1, obtaining the operation data of a certain group of offshore wind turbine generators, carrying out the data preprocessing, correlation analysis and feature screening, and obtaining a data set; 2, constructing an XGBoost model, and carrying out training until the model prediction effect is optimal, so as to obtain an optimal XGBoost model; and step 3, through the optimal XGBoost model, predicting the average generator speed of the group of offshore wind turbine generators, and monitoring the difference value between a predicted value and a true value to complete galloping early warning of the group of offshore wind turbine generators. And 4, performing data filling through a GAIN network, and migrating the data to other offshore wind turbine generators of the same wind farm by utilizing migration learning to realize galloping early warning of all the offshore wind turbine generators of the whole wind farm. The galloping early warning and monitoring accuracy can be improved, and the galloping monitoring hidden danger and early warning cost of the offshore wind turbine generator can be reduced.