45results about How to "Ensure long-term safe operation" patented technology

The invention discloses an embedded deep cooler for boiler flue gas, which comprises a shell 11; the side close to an inlet flue in the shell 11 is a high temperature section, and the side close to an outlet flue is a low temperature section; and flue clapboards 14 and 16 divide an inner cavity of the shell 11 into an upper flue compartment 12, a middle flue and a lower flue compartment 15. The embedded deep cooler performs deep cooling on boiler flue gas, effectively recovers afterheat of the boiler flue gas, reduces the temperature of flue gas at an inlet of a desulfurizing tower, reduces water consumption of the desulfurizing tower, improves the boiler efficiency and desulfurization efficiency, and achieves the aims of saving energy, improving efficiency and saving water resource.

The invention provides a condensation recycling method and device of unloading tail gas-naphtha. The method comprises the following steps: starting a circulating pump to return a condensation medium-glycol solution to a glycol storage tank via a refrigerating machine and a condenser; a naphtha tank car entering into a platform to be in para position with a loading arm and then transferring naphtha to an oil storage tank via a submersible pump at the inlet of the loading arm and an unloading oil pump; starting a vacuum pump to absorb the residual naphtha in the tank car into a vacuum tank whenthe tank car oil level is lower than the inlet of the submersible pump; opening an outlet valve of a condensate recycling tank to absorb the recycled condensate into the vacuum tank when the condensate is 1 / 2-2 / 3 of the recycling tank by volume; and stopping the vacuum pump, opening an outlet value of the vacuum tank and transferring the naphtha and the condensate in the vacuum tank to the oil storage tank by the unloading oil pump.

The invention relates to a regenerative thermal oxidation device and process for processing electroplating sludge sintering waste gas. The temperature of the inlet waste gas entering an RTO heat storage bed and the flow rate of the waste gas flowing through the heat storage bed are flexibly adjusted by arranging an inlet fresh air fan. An RTO cold bypass regulating pipeline and heat bypass regulating pipeline are arranged to flexibly adjust the heat load distribution, so as to adjust the temperature of an RTO regenerator and combustion chamber and improve the heat recovery efficiency. Throughthe fresh air fan and the cold and heat bypass adjustment, the organic silicon burned in the middle of the heat storage body can be avoided, and at the same time, a replacement layer is arranged on the top of the heat storage bed to solve the problem that the bed is blocked and difficult to clean. Through targeted improvement of the RTO device and process, the regenerative thermal oxidation deviceand process can adapt to the characteristics of electroplating sludge sintering waste gas, solve existing practical problems, realize long-term safe and efficient operation, meet the requirements ofemission standards, remove more than 99% volatile organic compounds, and have good economic and environmental benefits.

The invention discloses a radiographic inspection method with a medium high-temperature pipeline. The radiographic inspection method comprises the radiographic inspection of a pipeline at 50 DEG C-80 DEG C and the radiographic inspection of a pipeline at 80 DEG C above. The radiographic inspection of the pipeline at 50 DEG C-80 DEG C comprises the steps of when the pipeline temperature is 50 DEG C-80 DEG C, adhering a photographic film to a tool frame, installing the tool frame on the pipeline, and photographing when a certain distance is formed between the photographic film and the pipeline. The radiographic inspection of the pipeline at 80 DEG C above comprises the steps of when the pipeline diameter is below 100mm, adding a thermal insulation material with the thickness of 5mm-10mm between a photographic film and a weld line, and photographing; when the pipeline diameter is 100mm above, adhering a thermal insulation layer to the inner side of a tool frame by adopting a mode of the tool frame and the thermal insulation layer, adhering a photographic film to the tool frame at the outer side of the thermal insulation layer, installing the tool frame on the pipeline, adding a thermal insulation material with the thickness of 5mm-10mm between the photographic film and the weld line through the tool frame, and photographing. According to the invention, time is saved for the comprehensive inspection of the pipeline, and the overhauling cost is reduced greatly.

The invention provides on-line monitoring device and method of the stress intensity of a pressure-containing member outside a station boiler. The device comprises a stress intensity calculating server which is connected with a station boiler decentralized control device through a factory level monitoring information device. The method comprises the steps of: reading the data of on-line monitored points of the station boiler, calculating the thermal stress of the pressure-containing member outside the station boiler; calculating the mechanical stress of the pressure-containing member outside the station boiler, which is caused by working medium pressure; calculating the combined stress of the pressure-containing member outside the station boiler; calculating the stress intensity monitoringvalue of the pressure-containing member outside the station boiler; determining the yield limit of materials at a working wall temperature; calculating the relative stress intensity of the pressure-containing member outside the station boiler on line; determining the maximum relative stress intensity of the pressure-containing member outside the station boiler; and controlling the stress intensity of the pressure-containing member outside the station boiler. The invention realizes on-line calculation and control on the stress intensity of the pressure-containing member outside the station boiler.

The invention discloses a heavy oil railway unloading system capable of predicting unloading completion. The heavy oil railway unloading system comprises a unloading crane pipe; a heavy oil outlet ofthe unloading crane pipe communicates with an oil collecting pipe; a lowest point of the oil collecting pipe is connected with an inlet of an oil transfer pump group through an oil conduit, and an outlet of the oil transfer pump group is connected with a destination oil tank through an oil delivery pipe; the oil collecting pipe has a certain slope in the direction of the oil conduit, and the partconnecting the oil conduit with the oil collecting pipe is a vertical pipe; the connection between the oil collecting pipe and the vertical pipe is provided with a double-flange liquid level gauge; and a low pressure side of the double-flange liquid level gauge is connected with the top of the inner wall of the lowest point of the oil collecting pipe, and a high pressure side of the double-flangeliquid level gauge is connected with a pressure measuring point in the vertical pipe. According to the invention, the pre-judgment of the completion of the unloading of the heavy oil in the oil collecting pipe can be realized, the completion of the unloading is not judged by pumping a machine pump any more, but judged by the liquid level of the heavy oil when the unloading is about to being completed, measures are taken in advance to avoid pumping the machine, and the long-term safe operation of the equipment is ensured.

The invention discloses a method for controlling the alkali-aggregate reaction deformation of high arch dam concrete, simulating the expansion deformation of arch dam concrete alkali-aggregate reaction: predicting the expansion deformation value that may be caused by the alkali-aggregate reaction of arch dam concrete, and adopting the overall temperature rise of the dam body Simulate the alkali-aggregate reaction expansion deformation of arch dam concrete by using the method; analyze the impact of alkali-aggregate reaction expansion deformation on the long-term safety of arch dams. Aiming at the alkali-aggregate reaction problem of high arch dams, the present invention establishes an analysis method considering the influence of alkali-aggregate reaction expansion and deformation on the long-term safety of arch dams, and proposes a control index for allowing alkali-aggregate reaction expansion and deformation of dam concrete, and inhibiting concrete Alkali-aggregate reaction has adverse effects on the dam, and then a set of high arch dam concrete alkali-aggregate reaction deformation control technology has been established, which has achieved a technological breakthrough in the combination of concrete alkali-aggregate reaction and arch dam structure design. It is of great significance to ensure the long-term safe operation of high arch dams.

The invention discloses a hot washing flue gas turbine descaling device based on a blade thermal expansion coefficient. The hot washing flue gas turbine descaling device comprises a flue gas turbine shell, a fixed ring, sliding rods and a water tank, wherein the interior of the flue gas turbine shell is connected with a protective cover through a fixing rod, the fixed ring is fixedly mounted in the flue gas turbine shell, a circular groove is formed in the upper surface of the fixed ring, a sealing plate is fixedly installed on the outer side face of a top transmission ring, a transmission gear and side bevel gears are welded to the outer side face of a bottom transmission ring, the sliding rods are symmetrically installed on the two sides of the interior of the fixed ring, and the water tank is fixedly installed in the middle of the interior of a dust collection box. According to the hot washing flue gas turbine descaling device based on the blade thermal expansion coefficient, the novel structural design is adopted, the device conducts descaling machining on a flue gas turbine in a working state in a heat treatment mode, and operation is convenient and fast; and a catalytic fluegas pretreatment structure is arranged in the device, the influence of catalytic flue gas on an impeller is reduced, and use functionality of the device is increased.

The invention provides a construction method. The construction method comprises the following steps that (1) sand blowing bags are loaded on a laying ship by a traffic ship, a working ship is dragged by an anchoring ship to a site for positioning and anchoring positioning, a sand transporting ship sucks and loads sand at a specified position and transports the sand to the laying ship for barging, and two 6-inch slurry pumps are hoisted into a sand blowing cabin by the working ship; (2) a worker on the laying ship binds the folded sand blowing bags to a ballast die bed through a polypropylene nylon rope and an adjustable rope in a buckling manner, the laying work ship sinks the sand blowing bags into a washed foundation pit at the pile root of a pile foundation through a crane, the sand bags are tightly attached to the seabed plane at the bottom of the bottom pit, cuffs are exposed out of the sea water surface, and sand conveying pipes of the slurry pumps directly stretch into the cuffs to be tightened; (3) sand blowing is started; and (4) the ballast die bed is hung on the working ship, and the sand blowing bags are bound continuously. The construction method for offshore wind power pile foundation protection, ballast die bed positioning and underwater sand blowing bag soil fixation is invented, the problem that a positioning method in deep water cannot be solved for many years is solved, and the effect is very good.

The invention belongs to the technical field of petrifaction expansion joint compensation, and provides an expansion joint used for a cyclone separator. The expansion joint used for the cyclone separator comprises an outlet end pipe (9), an inlet end pipe (1) and a corrugated tube (4). One end of the inlet end pipe (1) is connected with a device, the inner diameter of the inlet end pipe (1) is the same as the inner diameter of the device connected with the inlet end pipe (1), the other end of the inlet end pipe (1) is located in the outlet end pipe (9), and therefore smoke can stably pass through the expansion joint, and impact of high-speed smoke on the inlet end pipe (1) can be avoided. The two ends of the corrugated tube (4) are provided with a supporting annular plate I (7) and a supporting annular plate II (2) respectively. A gap exists between the supporting annular plate I (7) and the inlet end pipe (1), and therefore gas pressure can enter the gap, and the displacement compensation function can be achieved. A plurality of air holes (10) are formed in the supporting annular plate II (2), and therefore the internal pressure of the corrugated tube and the external pressure of the corrugated tube can be communicated, and the design pressure and the work pressure of the corrugated tube can be lowered.

The invention discloses an embedded deep cooler for boiler flue gas, which comprises a shell 11; the side close to an inlet flue in the shell 11 is a high temperature section, and the side close to an outlet flue is a low temperature section; and flue clapboards 14 and 16 divide an inner cavity of the shell 11 into an upper flue compartment 12, a middle flue and a lower flue compartment 15. The embedded deep cooler performs deep cooling on boiler flue gas, effectively recovers afterheat of the boiler flue gas, reduces the temperature of flue gas at an inlet of a desulfurizing tower, reduces water consumption of the desulfurizing tower, improves the boiler efficiency and desulfurization efficiency, and achieves the aims of saving energy, improving efficiency and saving water resource.

The invention relates to an intelligent adjustable and flexible sealing system for a rotary type air pre-heater used in a large and medium-sized thermal power generating unit. The sealing system comprises an adjustable and flexible sealing piece, a nonadjustable sector plate, a casing curved plate, a sealing piece guide groove, a sealing piece push-pull rod, a push-pull rod sealing component, a straight stroke actuating mechanism, a digital position sensor, a temperature sensor, a contact-type sonic sensor and an industrial PC (personal computer) provided with an I / O (input / output) connector. The quality of the adjustable and flexible sealing piece accounts for 1% or less of that of the nonadjustable sector plate, the controllability is good, and the actuating mechanism is light in weight, intelligent and low in energy consumption; the application is expanded to cold side radial sealing and axial sealing, the air leakage rate of the rotary type air pre-heater under various working conditions can be reduced remarkably, and the station service power consumption rate is decreased remarkably; non-contact operation is adopted, so that the overhaul period of the intelligent adjustable and flexible sealing system can be adapted to an overhaul period of a large boiler body; and the sealing system can be easily adapted to special deformation patterns of rotors in the air pre-heater for thermal ash removing on each side, and the serious ash fouling problem of a denitration air pre-heater is solved.

The invention relates to a thermal power generating unit component accumulated low-cycle fatigue life loss monitoring and control method. The thermal power generating unit component accumulated low-cycle fatigue life loss monitoring and control method is characterized in that the thermal power generating unit component accumulated low-cycle fatigue life loss monitoring and control method comprises the following steps that: online measurement point data of a thermal power generating unit is read; thermal stresses of important components are calculated; mechanical stresses of the important components are calculated; composite stresses of the important components are calculated; equivalent stresses of the important components are calculated; a maximum stress of three composite stresses is determined; a minimum stress of the three composite stresses is determined; real-number-field equivalent stresses of the important components are calculated; stress time intervals with the same sign are classified; and the peak stress of sigma ij >=0 time intervals is determined. The invention provides a thermal power generating unit important component accumulated low-cycle fatigue life loss online monitoring and control device and the thermal power generating unit important component accumulated low-cycle fatigue life loss online monitoring and control method. With the thermal power generating unit important component accumulated low-cycle fatigue life loss online monitoring and control device and method adopted, online calculation and control of accumulated low-cycle fatigue life losses of the important components of one or a plurality of thermal power generating units can be realized.

The invention discloses a scour protection structure for an offshore wind and power foundation single pile. The scour protection structure comprises bottom-layer sand, second-layer sand, third-layer sand, top-layer sand and a plurality of sand bags, and inner layers are arranged on the upper surfaces of the bottom-layer sand, the second-layer sand, the third-layer sand and the top-layer sand. Thebottom-layer sand is in a circular ring shape, the inner diameter of the bottom-layer sand is matched with the outer diameter of the bottom of the foundation single pile, and the outer diameter is larger than the inner diameter by 5 cm. The second-layer sand is also in a circular ring shape, the inner diameter of the second-layer sand is matched with the outer diameter of the bottom of the foundation single pile, and the outer diameter is larger than the inner diameter by 10 cm. The third-layer sand is in a rectangular shape and is formed by two pieces of small rectangular sand, wherein each of the middle portions of the opposite sides of the two pieces of small rectangular sand is provided with a kidney-shaped notch, and a circular hole is formed in the center after the two pieces of small rectangular sand are encircled to the bottom of the foundation single pile. The top-layer sand and the second-layer sand are the same in shape and specification. The sand bags are thrown to the top-layer sand in a filling manner along the foundation single pile. According to the scour protection structure, stability of the seabed around the foundation single pile can be better protected.

The invention belongs to the technical field of well drilling and discloses an underground natural gas storage injection-production pipe column designing method. By comprehensively considering the influence on a pipe column from self weight of a pipe body, the temperature effect, the pressure effect and the friction effect generated by fluid flowing, on the basis of design of an existing pipe column, compression loads are considered and matched with the compression efficiency of a pipe column connector to design an underground natural gas storage injection-production pipe column, it is ensured that the compression efficiency of a connector of the designed pipe column meets the operation compression load and sealing requirements, and meanwhile as the triaxial stress of the pipe column is considered for design, the overall structural intensity of the injection-production pipe column can meet the operation load requirement. The underground natural gas storage injection-production pipe column designing method not only can meet the airtightness under stretching loads, but also can meet the airtightness of the pipe column after stretching and compression loads interchange, improve the sealing performance of the pipe column under the interchanged loads and ensure long-term safety operation of the injection-production pipe column.

The invention relates to a device and a method for the on-line monitoring of the transient-state low-cycle fatigue life loss of a pressure-containing member outside a utility boiler. The device comprises a transient-state low-cycle fatigue life loss compute server, wherein the transient-state low-cycle fatigue life loss compute server is connected with a utility boiler decentralized control device through a factory-level monitoring information device. The method comprises the following steps: reading the data of the on-line measuring points of the utility boiler; calculating the heat stress and the mechanical stress of a pressure-containing member outside the utility boiler; calculating the stress intensity of the pressure-containing member outside the utility boiler; calculating the low-cycle fatigue strain amplitude of the pressure-containing member outside the utility boiler; calculating the low-cycle fatigue life of the pressure-containing member outside the utility boiler; determining the maximum transient-state low-cycle fatigue life loss of the pressure-containing member outside the utility boiler; determining the threshold value of the transient-state low-cycle fatigue life loss; and controlling the transient-state low-cycle fatigue life loss of the pressure-containing member outside the utility boiler. The invention realizes the on-line calculation and control of the transient-state low-cycle fatigue life loss of the pressure-containing member outside the utility boiler.

The invention provides a construction method for a lifting system of a hydraulic ship lift and a method for controlling the installation precision, and belongs to the technical field of ship lift installation construction. The lifting system of the hydraulic ship lift comprises buoys, movable pulley blocks, winding drums, safety brakes, connecting shafts and steel wire ropes. According to construction method for the lifting system, high-efficiency and high-quality installation of hydraulic floating type lifting equipment can be realized, and the key technical problem of installation of the lifting system for providing driving force for the ship lift can be solved. According to the method for controlling the installation precision, the installation precision of the lifting system is controlled, and therefore accurate control of the installation quality of the lifting equipment and integrated regulation of the lifting equipment after assembly can be realized, reliable guarantee can be provided for safe, smooth and steady operation of the hydraulic ship lift, and the operation efficiency of the ship lift can be improved.

The invention discloses a microalloyed 35Cr45NiNb alloy steel for ethylene cracking furnace tubes, which contains C: 0.40-0.50, Si: 1.20-1.80, Mn: 0.60-1.20, P: 0.001-0.020, S: 0.001 in mass percent ~0.010, Cr: 35~36, Ni: 45~46, Nb: 0.80~1.50, W: 0.005~0.20, Mo: 0.005~0.20, Cu: 0.005~0.30, Al: 0.005~0.20, Ti: 0.05~0.10 , Zr: 0.05-0.10, B: 0.0010-0.0050, As: 0-0.0020, Sn: 0-0.0020, Pb: 0-0.0020, Bi: 0-0.0001, and the balance is Fe. The alloy steel requires columnar grains to account for more than 70% of the wall thickness, and the grain size grade is 5-6. The invention can effectively improve the high-temperature durability performance of the ethylene cracking furnace tube, so that it meets the requirement of a high-temperature durable fracture time greater than 100 hours under the conditions of 1100°C and 17 MPa, thereby achieving the purpose of ensuring long-term safe operation of the ethylene cracking furnace device.