189results about "Boiler water tubes" patented technology

The invention belongs to the technical field of fused salt energy storage, and particularly relates to a thermal power generating unit deep peak shaving system and method of a fused salt heat storage coupling high-temperature heat pump. In the high-generation time period of renewable energy sources, the load of a thermal power generating unit needs to be reduced, at the moment, a boiler operates at the lowest stable combustion load, a fused salt heat storage system is added, all main steam is extracted to enter the heat storage system to heat fused salt, a high-pressure cylinder of a steam turbine is stopped, and an intermediate-pressure cylinder and a low-pressure cylinder of the steam turbine operate under the low-load working condition; the output load of the unit only meets the plant power, and the load is not output to the power grid; in the load rising time period, heat stored by the fused salt heat storage system is used for generating steam in the unit load rising stage to increase the unit steam turbine load rising rate and peak power generation; the problems of operation safety and low energy grade in the unit peak regulation process are solved. In the peak period of electricity utilization, heat stored in the fused salt heat storage system is released into the unit, and the output load of the unit is rapidly increased. An outlet of the deaerator serves as a water taking point, part of supplied water is extracted to pass through the preheater, the evaporator and the superheater to generate high-temperature and high-pressure steam, the high-temperature and high-pressure steam enters a high-pressure cylinder of the steam turbine to do work, and therefore the output load of the steam turbine is rapidly increased. The invention provides a thermal power generating unit deep peak regulation system and method of a fused salt heat storage coupling high-temperature heat pump, and aims to realize deep peak regulation of a unit and power generation by absorbing renewable energy sources such as wind and light.

A system includes a heat exchanger having a plurality of tubes arranged in a tube bundle having opposite first and second sides, opposite third and fourth sides extending from the first side to the second side, and opposite fifth and sixth sides extending from the first side to the second side, wherein the fifth and sixth sides extend between the third and fourth sides. The heat exchanger further includes a plurality of external flow lanes extending across the tube bundle and between the fifth and sixth sides outside of the plurality of tubes. Each tube of the plurality of tubes comprises a plurality of tubing portions extending in opposite first and second directions between the first and second sides in a sequence, and each successive tubing portion in the sequence switches lanes between the plurality of external flow lanes relative to a preceding tubing portion.

To prevent dust from adhering to the interior of a boiler to protect the boiler.SOLUTION: A boiler includes: a heat radiation chamber having a heat transfer pipe which receives radiant heat of an exhaust gas circulating from a waste incinerator to generate steam, and a convective heat transfer chamber which overheats steam through heat exchange between the exhaust gas and the heat transfer pipe. The boiler has a plasma actuator, which generates airflow by an AC voltage being applied thereto, on a peripheral surface of the heat transfer pipe. Dust contained in the exhaust gas flows along the airflow generated by the plasma actuator. Thus, the structure can inhibit the dust contained in the exhaust gas from adhering to the heat transfer pipe and inhibit corrosion of the heat transfer pipe from being caused by the dust.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of boilers, in particular to a low-nitrogen gas steam boiler which comprises a boiler body, two groups of water pipes are arranged in the boiler body and include an ascending pipe and a descending pipe, the descending pipe is located on the periphery of the ascending pipe, a gas distributor is arranged on one side of the ascending pipe, and a burner is installed on the side, facing the ascending pipe, of the gas distributor. A preheater is arranged on the outer side of the furnace body, one side of the furnace body is connected with a flue, a smoke pipe is vertically installed in the middle of the interior of the preheater, the top end of the smoke pipe is connected with the flue, and the bottom end of the smoke pipe is connected with a chimney. According to the low-nitrogen gas-steam boiler, the boiler body and the combustor are integrally designed, so that complicated structures such as a return smoke tube and a reversal chamber in a traditional boiler are omitted, the overall size of the boiler is greatly reduced, the weight is reduced accordingly, and the boiler is convenient to install and transport.

The utility model relates to the technical field of sulfuric acid waste heat recovery, in particular to a tube bundle slideway device of a sulfuric acid HRS steam generator. Comprising a plurality of supporting plates arranged in parallel, mounting grooves are formed in the middles of the upper ends and the lower ends of the supporting plates correspondingly, rollers are arranged in the mounting grooves in the lower ends, mounting plates are arranged on the left sides and the right sides of the rollers correspondingly, and the lower ends of the rollers abut against sliding rails; angle steel sliding rails are arranged on the left side and the right side of the sliding rail respectively, and the supporting angle steel located in the angle steel groove at the lower end is pressed on the angle steel sliding rails. Compared with the prior art, the structure is simple, the performance is reliable, when the tube bundle of the HRS steam generator is installed in or drawn out of the shell, through rolling friction of the rollers, sliding friction of the left and right angle steel rails and guiding, the workload of installing or drawing out the tube bundle is greatly reduced, and deformation or damage caused by overlarge stress of the tube bundle is also avoided.

To improve heat exchange efficiency between a first fluid within heat transfer pipes and a second fluid at the outer side of the heat transfer pipes.SOLUTION: A heat exchanger includes: a pipe body formed with a passage to which a first fluid is supplied; a pair of partition plates which are disposed spaced apart from each other in an extension direction of the pipe body and define a closed space at a part of the passage; multiple heat transfer pipes which extend in the extension direction so as to penetrate through the pair of partition plates and arranged spaced apart from each other; a supply part which may supply a second fluid from the outside of the pipe body to the closed space; a discharge part which may discharge the second fluid in the closed space to the outside; and a passage formation part in which multiple small passage parts are formed between the heat transfer pipes located adjacent to each other with the closest spacing formed therebetween of the multiple heat transfer pipes. The second fluid circulates between the multiple heat transfer pipes so as to flow in an opposite direction of a circulation direction of the first fluid in the closed space. The multiple small passage parts are disposed at positions different from each other when viewed from a position where the discharge part is placed in the extension direction.SELECTED DRAWING: Figure 1

The invention provides a supercritical circulating fluidized bed unit dry and wet state automatic conversion and whole-course water supply control system and method, and belongs to the technical field of automatic control. The problems of low automatic input rate, complex and difficult wet state control strategy, large dry and wet state conversion disturbance, load control breakpoints and the like in once-through boiler feed water control in the deep peak regulation coordinated variable load process of the unit are solved; the main steam flow is corrected by introducing the enthalpy value of the last-stage superheater and the enthalpy value of the outlet of the separator on the basis of a self-balancing water supply control strategy, the heat released / absorbed by the boiler is dynamically reflected, the balance of the heat load and the evaporation capacity of the boiler is guaranteed, and meanwhile the boiler bed temperature and the wall temperature of a certain area of the boiler are corrected in real time; according to the method, the same set of control strategy is adopted for water supply control in the dry state and the wet state of the boiler, and switching and transformation of water supply control modes are not needed. Meanwhile, power control and dry-wet state conversion control are combined, and continuous power control in the dry-wet state conversion process is achieved.

The application relates to a boiler container, which comprises a container with a containing cavity, a plurality of openings in communication with the containing cavity, an inner wall of the container provided with a reflecting layer, and an outer wall of the container provided with a heat insulation layer; a plurality of boilers, at least one of which is arranged in the opening, and any two adjacent boilers are communicated through at least one heat transfer pipe, the heat transfer pipe is arranged in the containing cavity, and the reflecting layer is used for reflecting heat radiated outward by the heat transfer pipe to the heat transfer pipe. As known from the above, the boiler container in the embodiment can reduce the heat dissipation of the heat transfer pipe, reduce the heat energy loss of the boiler container, increase the number of the heat transfer pipes, and guarantee the energy conversion efficiency of the boiler container.

The invention discloses a water-cooled wall intermediate header flow distribution system of an ultra-supercritical coal-fired unit, which comprises an intermediate header and a collection header, a three-stage adjustable throttling orifice plate is arranged in an inlet pipeline of the intermediate header, a plurality of groups of cyclone flow deflectors are arranged in the intermediate header, the intermediate header is communicated with the collection header through a plurality of branch pipes, and the branch pipes are communicated with the collection header. The inlet of each branch pipe is provided with a Venturi pipe, and the outlet of each branch pipe is provided with a sensor probe of the control unit; the three-stage adjustable throttling orifice plate and the cyclone flow deflector are respectively in transmission connection with respective actuating mechanisms, and all the actuating mechanisms are in signal connection with the control unit. The invention further discloses a water-cooled wall intermediate header flow distribution method of the ultra-supercritical coal-fired unit. The invention belongs to the technical field of ultra-supercritical coal-fired power generation, and solves the problem that in the prior art, due to the limitation of structural design, the wide load range adjustment requirement cannot be met.

To provide a repair method of a hanging panel which enables easy repairing of the hanging panel, and to provide a hanging pipe alignment tool.SOLUTION: A hanging panel has a plurality of hanging pipes 14 arranged in a horizontal direction and is supported hanging from above. A repair method for repairing the hanging panel includes: an attachment step in which a hanging pipe alignment tool 2, including a plurality of sandwiching parts 3 each of which is arranged over the hanging pipes and sandwiches the hanging pipes from one side and the other side in a depth direction orthogonal to a vertical direction and an arrangement direction, is used and the sandwiching parts are attached to the upper side and the lower side of an area A to be repaired (a repaired area) of the hanging panel; and a repair step in which the hanging panel is repaired in the repaired area.SELECTED DRAWING: Figure 1

A system includes a heat exchanger having a plurality of tubes arranged in a tube bundle having opposite first and second sides, opposite third and fourth sides extending from the first side to the second side, and opposite fifth and sixth sides extending from the first side to the second side, wherein the fifth and sixth sides extend between the third and fourth sides. The heat exchanger further includes a plurality of external flow lanes extending across the tube bundle and between the fifth and sixth sides outside of the plurality of tubes. Each tube of the plurality of tubes comprises a plurality of tubing portions extending in opposite first and second directions between the first and second sides in a sequence, and each or at least one successive tubing portion in the sequence switches lanes between the plurality of external flow lanes relative to a preceding tubing portion.

To provide a method for forming a functional self-fluxing alloy coating, capable of exhibiting excellent wear resistance, corrosion resistance and lubricity and suppressing the suppression effect of the adhesion and deposition of ash (clinker) for a long period of time.SOLUTION: A method for forming a functional self-fluxing alloy coating comprises: the thermal spray coating formation step of forming a self-fluxing alloy thermal spray coating on the surface of a base material; the lubricant composition impregnation step; the drying step of drying the thermal spray coating including the impregnated lubricant composition to remove the solvent and form a thermal spray coating including the solid lubricant particles; and the self-fluxing alloy remelting step of heating the thermal spray coating including the solid lubricant particles to remelt the self-fluxing alloy.SELECTED DRAWING: Figure 1

The present invention discloses a control method for preventing oxide scale shedding from the heating surface during peak-shaving startup and shutdown of a coal-fired unit. By controlling the rate of change of steam temperature and pressure during startup and shutdown, sudden changes in steam and wall temperatures are prevented. The method also adjusts the opening of the boiler's additional air and fuel air dampers to control the flue gas temperature at the furnace outlet and prevent overheating and dry burning of the heating surface. The method also adjusts the opening of the high-pressure bypass to control the steam flow rate on the heating surface and prevent sudden changes in superheated steam temperature. During turbine run-up and generator grid connection, the method adjusts the reheat flue gas damper to prevent a sudden rise in reheated steam temperature. During shutdown, the method controls the superheat after the desuperheater to prevent water plugging in the superheater. Thus, without upgrading or renovating the heating surface materials, and only by optimizing the operation control method, it is possible to achieve a state where oxide scale is not detected on the heating surface throttle orifices and the bottom of the U-bend within a single maintenance cycle, and tube bursts are avoided.

The utility model belongs to a boiler main steam pipeline in the technical field of power generation systems. The main steam pipeline comprises a first pipeline assembly (1) and a second pipeline assembly (2), a first pipeline assembly flange (3) is arranged at one end of the first pipeline assembly (1), a second pipeline assembly flange (4) is arranged at one end of the second pipeline assembly (2), a communicating part is connected between the first pipeline assembly flange (3) and the second pipeline assembly flange (4), and the communicating part comprises a connecting straight pipe (5) and a connecting bent pipe (6). According to the main steam pipeline of the boiler, after a superheater of the boiler is replaced, purging can be conveniently carried out, relevant parts do not need to be disassembled, and operation convenience is improved.

A method of installing a liner assembly for pipeline repair or reinforcement includes: pulling a prepared liner assembly into position in the pipeline, the liner assembly including an outer tubular liner and an inner inflatable bladder positioned longitudinally within the tubular liner, the tubular liner being wetted with a curable compound; introducing fluid into the inflatable bladder so that the inflatable bladder expands to bring the tubular liner into firm contact with an interior surface of the pipeline; flowing the fluid continuously through the bladder and discharging the fluid into the pipeline, while maintaining the liner assembly in an inflated condition for a time period sufficient for the tubular liner to cure; and deflating the inflatable bladder and retrieving at least a portion of the liner assembly from the pipeline.

To provide a furnace wall in which corrosion is less likely to occur in a water-cooled wall even when components contained in furnace gas permeate through a refractory material.SOLUTION: A furnace wall 111 of a gasification furnace comprises: a water-cooled wall 112 having a plurality of heat transfer tubes 112a; a protective film 113 provided on a surface of the water-cooled wall 112 and having higher corrosion resistance than the water-cooled wall 112; and a protective material 114 provided on a surface of the protective film 113. The protective material 114 may contain slag generated in the gasification furnace.SELECTED DRAWING: Figure 3

The invention discloses a supercritical gas-fired boiler based on tower type arrangement and a thermal optimization control method, and relates to the field of supercritical gas-fired boilers, the supercritical gas-fired boiler comprises a hearth, a burner, a water cooling wall, a heating surface in the boiler, a header outside the boiler, an economizer and a tubular air preheater. The periphery of the hearth is wrapped by an ash bucket water-cooled wall, a spiral tube coil water-cooled wall and a vertical tube coil water-cooled wall, in-furnace heating surfaces are sequentially arranged in the smoke flowing direction and are suspended through in-furnace suspension tubes, and an out-furnace collecting box is suspended through out-furnace suspension tubes; the economizer is divided into an upper stage and a lower stage, is arranged by adopting sequential tube bundles and is provided with a bypass, and a denitration reactor is arranged between the upper stage and the lower stage; the suspension pipe is made of high-strength alloy steel, a working medium flows in the suspension pipe, and a heating surface and related parts are made of alloy materials with adaptive performance. The invention has the technical effects of high safety of the wall temperature of the heated surface, small deviation, small occupied area, low smoke, wind, steam and water resistance, smooth expansion system, adaption to the rapid variable load requirement, excellent environmental protection property, reliable operation and the like.

The invention provides a thermal stress self-release type steam generator heat transmission structure capable of achieving eddy current inspection, and relates to the technical field of nuclear reactor steam generators, and the thermal stress self-release type steam generator heat transmission structure capable of achieving eddy current inspection comprises an expansion supporting structure and a spiral heat transfer pipe; the expansion supporting structure comprises a center cylinder, an upper tube plate and a lower tube plate, the upper end of the center cylinder is connected with the upper tube plate, the lower end of the center cylinder is connected with the lower tube plate, and the center cylinder is provided with a thermal compensation structure; the spiral heat transfer pipe is wound on the periphery of the center cylinder. The device has the advantages of efficient heat transfer, stable structure and convenience in maintenance, heat stress is effectively released and structural deformation and damage are prevented through thermal compensation design in the expansion supporting structure, heat transfer efficiency is improved through design of the spiral heat transfer pipe, eddy current inspection is facilitated through the overall structure, maintenance difficulty is reduced, and the device is suitable for popularization and application. And the safety and the service life of the equipment are improved. According to the invention, in-service eddy current inspection can be efficiently and conveniently carried out, and high thermal stress can be effectively resisted.

The utility model provides a steam generating pipeline of a steam generator, and belongs to the technical field of heat energy engineering. The technical problems of low gas combustion utilization rate, low heating efficiency and the like in the prior art are solved. The steam generation pipeline of the steam generation furnace comprises an axial coil pipe which extends in the spiral axial direction, at least one end of the axial coil pipe is provided with a radial coil pipe set, one end of the axial coil pipe and one end of the radial coil pipe set are connected into a whole, the radial coil pipe set comprises a plurality of radial coil pipes distributed in the axial direction, and the radial coil pipes are arranged in the radial coil pipe set. And the inner end of one radial coil pipe of two axially adjacent radial coil pipes is connected with the outer end of the other radial coil pipe into a whole. The utility model has the advantages of high heating efficiency, high gas utilization rate, lower operation cost, long service life and the like, and is provided with a monitoring mechanism.

The application provides a gas cooled reactor nuclear power unit secondary loop and oxygenation treatment method, and relates to the technical field of oxygenation treatment of a gas cooled reactor nuclear power unit secondary loop. The oxygenation treatment method of the gas cooled reactor nuclear power unit secondary loop comprises a post-starting feedwater oxygenation conversion stage, a normal operation oxygenation control stage and a pre-shutdown feedwater oxygenation conversion stage. The oxygenation treatment method of the gas cooled reactor nuclear power unit secondary loop can effectively prevent dissolved oxygen from entering a steam generator heat transfer pipe during the starting and stopping stages, thereby avoiding intergranular corrosion and stress corrosion of the steam generator nickel-based alloy caused by the synergistic effect of dissolved oxygen and high-concentration anions.

The present invention is a method for feeding a chemical to a steam system that controls the injection of a water treatment chemical to the steam system, the method being for feeding a chemical to the steam system that comprises: a pressure sensor, a temperature sensor, or a steam trap as a steam circulation detection means provided to the steam system; and a chemical feed pump for injecting the water treatment chemical to the steam system, said steam system controlling the injection of the water treatment chemical by means of the chemical feed pump in accordance with the steam circulation detection status of the steam circulation detection means.

The utility model belongs to the technical field of boiler steam systems, and particularly relates to a steam generating device of a boiler steam system, which comprises a boiler and a gas-liquid separator connected with the boiler, a flue is arranged at the top of one side of the boiler, a material returning channel is arranged at the bottom of the boiler, a hearth is arranged in the boiler, and an air chamber is arranged at the bottom of the hearth. An air distribution plate is arranged between the hearth and the air chamber, a plurality of rows of air caps with different hole diameters are arranged on the air distribution plate, and the hole diameters of the air caps close to the front and rear walls of the boiler and the furnace walls on the left and right sides of the boiler are larger than those of the air caps in other areas. According to the air cap arrangement mode, the fluidization air volume is reduced, the fluidization effect is improved, and the carbon content is reduced.

A bottom seal for a boiler is provided that includes a first refractory layer, a second refractory layer, a plurality of anchors, and an alloy plate. The first refractory layer is made of a castable refractory material. The second refractory layer is positioned below the first refractory layer. The anchors are configured to support the first and second refractory layers. The alloy plate is configured to be positioned below and support the first and second refractory layers. The first and second refractory layers are configured to seal a bottom opening of the boiler.

The utility model discloses a waste heat boiler dense tube panel structure which comprises a plurality of tube panel sets arranged at intervals, a header assembly, an anti-vibration device and a connecting assembly, each tube panel set comprises a plurality of heat exchange tubes and a plurality of connecting tubes, the heat exchange tubes are sequentially arranged and communicated with one another, and the connecting tubes are used for being communicated with the heat exchange tubes in the same tube panel set. The anti-vibration device comprises first anti-vibration pieces arranged at the tops of the tube panel sets and at least one second anti-vibration piece arranged at the bottoms of the tube panel sets, and the connecting assembly comprises a plurality of first connecting plates arranged on the side faces of the tube panel sets in parallel and second connecting plates arranged at the bottoms of the tube panel sets. According to the utility model, the heat exchange efficiency and the heat economy can be improved, and the anti-vibration device which is convenient to disassemble is arranged, so that the efficiency of unit equipment can be prevented from being sacrificed during the maintenance operation, and the maintenance operation is convenient.

This coating film is formed on a surface of a base material (11) of a furnace, and has a coating layer (12) that contains 10%-30% by mass of molybdenum, 0.5%-2.5% by mass of silicon, 0.1%-1.0% by mass of boron, 0.1% by mass or less of carbon, 5.5%-15% by mass of cobalt, and nickel which is an element accounting for the largest mass ratio among the metal elements and the metalloid elements, in terms of ratio with respect to the total of the metal elements and the metalloid elements.

The invention provides a lining pipe structure for a heat exchange device and the heat exchange device. The lining pipe structure comprises one or more lining pipes, and the mounting structure is connected with the lining pipe, and the mounting structure is used for being connected or welded and fixed with the main steam pipe plate, so that the lining pipe is reliably fixed in the heat exchange pipe at the main steam pipe plate and / or the hole of the main steam pipe plate. Wherein the lining pipe is arranged in a heat exchange pipe at the main steam pipe plate and / or an open pore of the main steam pipe plate in a penetrating manner, a gap is formed between the lining pipe and the heat exchange pipe and / or the open pore, and fluid in the gap is in a stagnation state or the fluid speed is smaller than 2m / s, so that the thermal resistance between steam and the heat exchange pipe and / or the main steam pipe plate is increased. And / or, a heat insulation coating or structure is arranged on the surface of the lining pipe, so that the heat resistance between the steam and the heat exchange pipe and / or the main steam pipe plate is increased. Thus, the endurance capacity of structures such as the main steam pipe plate to the main steam temperature difference is enhanced, the operation margin of the steam generator is improved, the service life of the steam generator is prolonged, and the yield and quality of steam are improved.

This invention discloses an energy-saving boiler vehicle steam generator, relating to the field of energy-saving boiler technology. It includes a boiler drum with end caps fixedly installed at both ends. It also includes a heat exchange tube assembly located inside the boiler drum, comprising two support rings fixedly connected to the sides of the end caps facing the boiler drum. Four support plates are arranged in a rectangular array between the two support rings, with the length direction of the support plates aligned with the axial direction of the support rings. Each support plate has a U-shaped spring fixedly connected to one end facing the support ring, with the opening direction of the U-shaped spring aligned with the axial direction of the support ring. The side of each U-shaped spring away from the support plate is fixedly connected to the outer side of the corresponding support ring. By floating the spiral heat exchange tubes, the constraint force during thermal deformation is reduced, avoiding the cracking, water leakage, and air leakage that easily occur with traditional fixed-connection heat exchange tubes, ultimately leading to heat source waste.

The utility model provides a staged burner and a steam coil thereof. The steam coil pipe comprises a water inlet pipe, a heated coil pipe and a steam ejection ring pipe which are sequentially connected, the heated coil pipe is spiral, the diameter of the inner ring contour of the steam ejection ring pipe is larger than that of the outer ring contour of the heated coil pipe, and a plurality of steam outlet holes are formed in the steam ejection ring pipe. Water enters from a water inlet pipe of the steam coil pipe to cool primary flame combusted in the fire protection barrel, local high temperature is prevented, NOx emission of a primary combustion area is reduced, meanwhile, steam generated by heating is sprayed out from a steam outlet hole of the steam spraying ring pipe, and the steam and secondary air participate in secondary combustion after being mixed in a secondary air shell. OH and H groups generated by decomposition of the water vapor can be subjected to chain reaction with CO generated by primary combustion, the reducing atmosphere is enhanced, NO in-phase reduction reaction is facilitated, meanwhile, H and OH free radicals generated by dissociation of the water vapor can inhibit oxidation of HCN to NO, and the generation amount of NO is reduced under the combined action of the H and OH free radicals and the CO free radicals.

The application discloses a kind of early warning method, device, equipment and storage medium of heated surface tube screen state, by dividing into multiple tube screen nodes, obtain the multiple inner wall temperature information corresponding to the multiple tube screen nodes and the data information of control system, and then calculate the multiple outer wall temperature information corresponding to the multiple tube screen nodes;According to the multiple outer wall temperature information and the data information of control system, calculate the multiple oxide skin generation thickness corresponding to the multiple tube screen nodes;According to the multiple oxide skin generation thickness, preset first critical thickness value and preset second critical thickness value, obtain the multiple oxide skin accumulation thickness corresponding to the multiple tube screen nodes;When any one of the multiple oxide skin accumulation thickness reaches preset accumulation thickness value, generate the early warning information corresponding to the preset accumulation thickness value.The application can monitor the state of high-temperature heated surface tube screen in real time, effectively reduce the occurrence of tube screen explosion leakage accident.