73results about "Boiler drums/headers" patented technology

The utility model provides an independent circulation pipeline evaporator which comprises an ascending pipe connected to a steam pocket; the first evaporation screen is communicated with the ascending pipe through a first ascending communicating pipe, the first evaporation screen comprises a plurality of first pipe pieces, and the first pipe pieces are arranged on two flues in parallel; each first duct piece is arranged in a bow shape in the vertical direction, so that the heating area of each first duct piece is increased, and meanwhile, a steam soot blower can penetrate through each first duct piece and carry out decoking and soot cleaning on each first duct piece; the first descending communicating pipe is connected between the first evaporation screen and a descending pipe, and the descending pipe is connected to the bottom of the steam pocket and used for conveying water in the steam pocket to the first descending communicating pipe and then conveying the water to the first evaporation screen. The problems of overtemperature and high-temperature corrosion of the superheater mentioned in the background technology are solved.

A fully premixed combustion low-nitrogen steam boiler relates to the technical field of steam boilers and comprises a box body and a plurality of standardized boiler modules sequentially arranged along a mounting cavity of the box body. The boiler module is composed of a boiler body, a full premixing burner, a negative pressure steam pocket and a symmetrical tubular heat exchanger. Spiral grooves are formed in the walls of the furnace body combustion cavities and communicated with the water heating cavities, so that water flow forms a thin-layer water film to strengthen heat exchange and prevent local dry burning, and the adjacent furnace body combustion cavities are communicated to realize smoke cascade transmission; hot air flow spirally circulates to prolong the heat exchange time, the full-premixing combustor is combined with the impeller to diffuse fuel gas, the metal fiber net forms low-temperature diffusion flames, and generation of nitric oxide is remarkably inhibited; the negative-pressure steam pocket accelerates evaporation in a negative-pressure environment, so that the steam production rate is increased; flue gas forms a U-shaped loop through the flow guide structure and flows through the tubular heat exchanger. The modular design supports on-demand combination and later expansion, the overall structure is high in heat efficiency, low in emission and safe and reliable in operation, and the multi-working-condition load requirement is met.

The invention relates to the technical field of boilers, in particular to a boiler header which comprises a body, the body comprises at least two barrels, and multi-screen tube rows are arranged in the extending direction of any barrel at equal intervals. In a factory, the multi-screen tube row is welded to the barrel in advance to form a split structure of the header, then the split structure is transported to a construction site, the barrel of the split structure is welded on the construction site, and finally manufacturing of the header is completed. The split structures of the header are transported to the construction site, compared with an overall transportation mode of the header, the split structures are small in size, the split structures can be fully fixed, impact force of jolting on weld joints in the transportation process is small, the weld joints are not prone to cracking, the split structures are convenient to assemble and disassemble, and the assembly and disassembly are convenient. Therefore, the transportation difficulty is greatly reduced.

This invention discloses a waste heat steam boiler system, including a steam drum and a heating boiler shell. The steam drum is equipped with a main steam outlet and a water inlet. The heating boiler shell contains a cylindrical heating chamber. Several parallel and spaced waste heat flue gas heat exchange tubes pass through the heating chamber laterally, forming a flue gas heat exchange tube array. The lower part of the inner cavity of the steam drum is connected to the lower end of the heating chamber through a downcomer, and the upper end of the heating chamber is connected to the inner cavity of the steam drum through a riser. The heating chamber is equipped with a labyrinthine steam dissipation structure, thereby improving the overall heat utilization efficiency of high-temperature flue gas.

The utility model relates to the technical field of boilers, in particular to a four-mode boiler structure which comprises a boiler body, a smoke outlet and an ash outlet. A smoke outlet is welded to the middle of the top end of the boiler body, and ash discharging openings are formed in the middles of the left side and the right side of the boiler body. The furnace doors are mounted at the lower parts of the left and right sides of the boiler main body and are positioned at the two ends of the hearth; the gas pipes are welded to the middle positions of the inner walls of the front end and the rear end of the boiler body, and a plurality of gas nozzles are evenly welded to the gas pipes in a transverse interval arrangement mode. Through the improvement on the structure, the boiler has the advantages of hearth dry burning prevention function, effective improvement of the service life of the hearth, high heat energy utilization rate, higher practical performance, higher practical value and the like, so that the problems and defects in the prior art and equipment are effectively solved and overcome.

The application discloses a kind of gas steam boiler tail gas waste heat recycling regulation and control system, it includes: low-pressure steam pocket;Water supply pump is used to water supplement in low-pressure steam pocket;Flue gas temperature monitor is used to monitor the flue gas temperature value of the tail of boiler in real time;Water level monitor is used to monitor the water level value in low-pressure steam pocket in real time;Hot water heater is connected between water supply pump and low-pressure steam pocket, for using the flue gas waste heat of the tail of boiler to preheat water body before entering low-pressure steam pocket;Water temperature monitor is used to monitor the water body temperature value at hot water heater outlet in real time;Control unit is used to comprehensively regulate and control the water body flow that is preheated by hot water heater according to the data collected by instrument.The water supplement of low-pressure steam pocket is heated by hot water heater before being sent into low-pressure steam pocket to continue to carry out steam-water circulation, which can reduce the flue gas temperature of boiler, improve the thermal efficiency of boiler, and the water body flow that needs to be preheated can also be accurately regulated and controlled by control unit using relevant data.

The utility model discloses a novel gas turbine waste heat boiler header which comprises a header body, the header body is divided into a header left barrel and a header right barrel through a middle partition plate, a high-pressure cavity and a medium-pressure cavity which are independent are formed, and the high-pressure cavity and the medium-pressure cavity are connected with heating surface tube bundles of a high-pressure economizer and a medium-pressure economizer respectively. The left header barrel and the right header barrel are located on the same axis. The header structure is shared by the high-pressure economizer and the medium-pressure economizer, double-system splicing is achieved by segmenting the header and using the middle partition plate, traditional modular limitation is broken through, the transverse row number of the heating surface of the medium-pressure economizer can be dynamically adjusted, and therefore the approaching point temperature is accurately controlled, and the waste heat utilization efficiency is improved.

The utility model belongs to the technical field of waste heat recycling, and particularly relates to a steam waste heat boiler which comprises a supporting frame, a boiler body, a top boiler barrel, a plurality of upper boiler barrels, a plurality of pairs of U-shaped rods, a plurality of lower boiler barrels, a plurality of pairs of elastic supporting pieces, a slag discharging hopper, a plurality of conveying pipes, a plurality of heat exchange pipes and a plurality of lower conveying pipes. The two ends of the upper boiler barrel are hung below the two second cross beams respectively through the U-shaped rods, and then the two ends of the lower boiler barrel are flexibly supported on the two third cross beams respectively through the elastic supporting pieces, so that the boiler body is fixed and supported; by means of the characteristics that the U-shaped rod allows the upper boiler barrel to slightly displace during thermal expansion and cold contraction and the elastic supporting piece absorbs displacement of the lower boiler barrel and buffers stress, thermal expansion and cold contraction caused by temperature changes in the operation process of the boiler can be adapted, and therefore damage of displacement and stress to the boiler structure is dispersed and reduced; and the stability and the safety of the whole structure of the boiler are ensured.

The utility model relates to the technical field of hearths, and discloses a hearth assembly of a coal-fired power generation boiler, which comprises a hearth mechanism, a feeding door and an air inlet pipe, the feeding door and the air inlet pipe are respectively communicated with the front side and the left side of the hearth mechanism, the right side of the hearth mechanism is communicated with a square pipe, and a filter module is inserted in an inner cavity of the square pipe. An air outlet of the square pipe is communicated with a three-way valve set, the back face of the three-way valve set is communicated with a bent pipe, the bent pipe is communicated with the air inlet pipe, a limiting mechanism is inserted into the top of the filtering module and comprises a T-shaped arm, and a spring is connected between the T-shaped arm and the filtering module. According to the hearth assembly of the coal-fired power generation boiler, the combustion effect of fuel is improved, then waste gas is recycled, energy loss is reduced, the filtering module is rapidly assembled and disassembled from the interior of the square pipe through the additionally-arranged T-shaped arm, spring, connecting rod, clamping block and clamping frame, and therefore the assembling and disassembling speed of the filtering module is increased, and the assembling and disassembling efficiency of the filtering module is improved. And a worker can conveniently maintain and overhaul the filtering module.

The utility model discloses a steam header for a multi-stage energy-saving steam system, which comprises a body, an air inlet and a sealing cover are respectively arranged on two sides of the body, an air outlet with the caliber decreasing in sequence is arranged at the top of the body from the air inlet to the sealing cover, a water outlet pipe is arranged at the bottom of the body close to the sealing cover, and a water inlet pipe is arranged at the bottom of the body. A flange cover is arranged on the water outlet pipe, a drainage pipe is arranged on one side of the water outlet pipe, and a filter screen, a steam trap and a liquid pump are sequentially arranged on the drainage pipe. The steam distribution device is simple in structure, utilizes one header to replace a plurality of steam boxes to respectively distribute steam to different pipelines, and is good in using effect.

The invention relates to the field of steam generators, and provides an in-pipe evaporation winding pipe type steam generator in order to solve the problems that an existing steam generator is large in occupied area and high in manufacturing cost, and when the density difference between steam and liquid is small, gas-liquid separation is difficult to achieve effectively. Comprising a shell, a liquid pipe, a vapor-liquid separator, a return pipe and a liquid level measuring cylinder, and the shell is provided with a heating medium outlet and a heating medium inlet; the liquid pipe is arranged in the shell, and a heating medium runner is formed between the outer wall of the liquid pipe and the inner wall of the shell; the vapor-liquid separator is communicated with the heating medium flow channel; the upper end of the return pipe is communicated with a liquid outlet of the vapor-liquid separator; and the lower end of the return pipe is communicated with the liquid level measuring cylinder. By means of the structure, direct-current evaporation of liquid can be effectively achieved, and operation control is convenient and fast. When the heat provided by the heat medium is insufficient, the heat condition of the heating medium can be judged by monitoring the liquid level change.

The application provides a boiler intermediate mixing header system and a boiler water circulation system, wherein the boiler intermediate mixing header system comprises a header structure, the header structure comprises an inlet box section and an outlet box section in communication with the inlet box section, a first channel is arranged in the inlet box section, a second channel is arranged in the outlet box section, and the cross-sectional area of the first channel is smaller than that of the second channel in the direction perpendicular to the extension direction of the first channel to the second channel; a plurality of inlet portions are arranged on the header structure at intervals and in communication with the inlet box section; and a plurality of outlet portions are arranged on the header structure at intervals and in communication with the outlet box section. Therefore, the technical scheme of the application effectively solves the problem of large outlet steam-water temperature deviation of the boiler spiral pipe ring in the related art, and further causes the uniformity of the steam-water temperature entering the vertical pipe ring water wall to be poor.

The invention provides an anti-tension-crack structure for a tube panel and a header, and relates to the technical field of power station boilers. Comprising a plurality of heating surface tube panels and a header, and one end of each heating surface tube panel is inserted into a water cooling wall; the header is communicated with a plurality of pipe joints, and the other end of the heating surface pipe panel is connected with the pipe joints; the heating surface tube panel comprises a horizontal section and an inclined section, the horizontal section is inserted into the water cooling wall, and the inclined section is located outside the water cooling wall; one end of the inclined section is connected with the horizontal section, and the other end is connected with the pipe joint; the vertical distance between the end, close to the pipe joint, of the inclined section and the boiler center line is smaller than that between the end, close to the horizontal section, of the inclined section and the boiler center line. According to the invention, the heating surface tube panel is arranged in an offset manner, so that after the normal operation of the boiler, the inclined tensile stress concentration caused by the expansion difference between the heating surface tube panel and the pipe joint of the header can be effectively eliminated, the problem that the pipe joint of the header is easy to crack due to tension is effectively solved, and the safety and stability of the boiler are improved.

The utility model discloses a household steam cleaner water-saving water tank structure which comprises a machine shell, a control panel is arranged on the top of the machine shell, a water-saving mechanism is arranged in the machine shell, the control panel and the water-saving mechanism are arranged, a water tank is used for storing cleaning water, the water tank is connected with a water control valve through a guide pipe, and the water control valve is connected with the water-saving mechanism. Water is conveyed to the output pipe by means of the water pump, in the process, the flow sensing valve and the water control valve on the output pipe cooperatively operate, which is the core for accurately controlling the water yield, compared with a traditional water tank structure, the water yield can be flexibly adjusted according to the actual cleaning condition, and the water yield can be accurately controlled just like in the typical scene of cleaning small objects. A traditional cleaning machine supplies water according to a default large water yield, a large amount of water is not fully converted into steam and then is discharged, water resources are lost, the situation of excessive water supply can be effectively avoided through cooperative operation of a flow sensing valve and a water control valve, and waste of the water resources is reduced to a great extent.

The invention provides a high-capacity shell boiler which comprises a hearth, an upper shell, a middle shell and a lower shell, and the upper shell, the middle shell and the lower shell are transversely arranged on the right side of the hearth from top to bottom. The upper boiler shell is communicated with the middle boiler shell through a steam communicating pipe, the middle boiler shell is communicated with the lower boiler shell through a steam communicating pipe, and a plurality of transverse smoke pipes are arranged in the upper boiler shell, the middle boiler shell and the lower boiler shell; a front smoke box is arranged at the left end of the upper boiler shell, a rear smoke box is arranged at the right end of the upper boiler shell, a rear smoke box is arranged at the left end of the middle boiler shell, a front smoke box is arranged at the right end of the middle boiler shell, and a front smoke box is arranged at the left end of the lower boiler shell. A burnout chamber is arranged at an outlet of the hearth and communicated with the front smoke box of the upper boiler shell through a high-temperature flue, the rear smoke box of the upper boiler shell is communicated with the front smoke box of the middle boiler shell through a high-temperature flue, the rear smoke box of the middle boiler shell is communicated with the front smoke box of the lower boiler shell through a high-temperature flue, and the rear smoke box of the lower boiler shell is communicated to a smoke outlet. The capacity of the boiler can be increased, and transportation and installation are convenient.

The embodiment of the present disclosure provides a water-cooled gas boiler with reinforced heat exchange, comprising: a furnace body, comprising a membrane water wall and a convection heat exchange tube bundle which are oppositely and radially spaced, and a furnace chamber surrounded by the membrane water wall and the convection heat exchange tube bundle; the membrane water wall is provided with a combustion hole, and the outer side of the convection heat exchange tube bundle is provided with a spoiler column; the boiler further comprises an upper steam drum arranged at the top of the furnace body, a lower header arranged at the bottom of the furnace body, and a flange arranged on the upper steam drum; wherein the boiler feed water is distributed through the upper steam drum, flows downward through the membrane water wall and the convection heat exchange tube bundle and absorbs heat therein, and the generated steam-water mixture is collected in the lower header and then returns upward to the upper steam drum for steam-water separation, so that the separated saturated steam is output through the flange.

An embodiment of this application provides a pool-type steam generator, comprising: an inner cylinder forming a accommodating space suitable for housing a reactor core and shell-side medium; at least one shell-side medium inlet is provided at the upper part of the inner cylinder for introducing shell-side medium heated by the reactor core; and a shell-side medium outlet is provided at the bottom of the inner cylinder, wherein the shell-side medium is liquid metal; an outer cylinder fitted inside the inner cylinder, forming an annular space between the outer cylinder and the inner cylinder; a plurality of threaded pipes disposed within the annular space, each threaded pipe including a tube-side medium inlet at the bottom and a steam outlet at the top, wherein the tube-side medium flowing upward within the threaded pipe undergoes countercurrent heat exchange with the shell-side medium to become steam, which flows out from the steam outlet; and a pumping assembly connected to the shell-side medium inlet, the pumping assembly being suitable for pumping the shell-side medium heated by the reactor core from the shell-side medium inlet into the annular space.

The application discloses a SHS gas boiler with straight fin tube special-shaped combined multi-mechanism coupled enhanced heat exchange, which comprises a full premix water-cooled burner, upper and lower boiler drums, a furnace membrane water-cooled wall, a front light tube bundle and a straight fin tube special-shaped combined tube bundle group. The full premix water-cooled burner ignites and burns after mixing air and gas on the inner surface of a water-cooled combustion head; high flue gas is cooled by the furnace membrane water-cooled wall and the front light tube bundle, and then enters a straight fin tube special-shaped combined tube bundle group formed by symmetric fork-shaped straight fin tubes and front and rear double-wing-shaped longitudinal flat fin tubes to form a multi-mechanism coupled enhanced heat exchange tube row, and the flue gas is discharged from the boiler body after being gathered. x The full premix water-cooled combustion reduces the combustion temperature to realize ultra-low NOx emission, the flame length is short, and the depth of the furnace is only one tenth of that of a traditional diffusion combustion boiler; the straight fin tube special-shaped combined tube bundle group significantly improves the heat exchange coefficient of the tube bundle group, greatly reduces the longitudinal row number of the water pipes, is only one tenth of that of a traditional SZS longitudinal row number, and significantly reduces the steel consumption of the boiler, welding workload, manufacturing cost and carbon emission.

The invention relates to the technical field of waste incineration, in particular to a heat conduction oil heating system and a heat conduction oil temperature control method. Comprising a garbage grate, a boiler hearth, a high-temperature superheater, a medium-temperature superheater, a high-temperature heat-conducting oil heat exchanger, a low-temperature superheater, a low-temperature heat-conducting oil heat exchanger, an economizer, a flue gas preheater and a flue gas purification system which are sequentially arranged along the flue gas flow. According to the system, a flue gas backflow system is arranged in front of an inlet of a flue gas purification system and used for extracting low-temperature flue gas and conveying the low-temperature flue gas to the front of an inlet of a high-temperature heat conduction oil heat exchanger so as to regulate and control the flue gas temperature of the inlet, and through integrated arrangement of multiple stages of heating surfaces, high-quality steam and industrial heat conduction oil are efficiently produced while waste heat of waste incineration is achieved; after the high-temperature heat conduction oil heat exchanger is arranged in a high-temperature flue gas area, the pipe wall abrasion and pipe explosion risks are avoided; and active and accurate control of the temperature of the heat conduction oil is realized through a flue gas backflow mechanism, so that over-temperature cracking and coking of the heat conduction oil are effectively prevented, and the operation safety and stability of the system are remarkably improved.

The application discloses a kind of converter waste heat boiler scale blowing cleaning method, the method comprises the following steps: S1, after the end of the maintenance furnace base converter item repair, the corresponding waste heat boiler is boiled, closes the steam regulating valve (3) of the steam drum (1) outside sending to regenerator, opens steam drum (1) steam is dispersed by dispersing valve (2);S2, close dispersing valve (2) after the water temperature of steam drum (1) is reduced to 100 degrees;S3, using gas welding to open mobile section flue blowout hole (17) of mobile section lower annular tube, open fixed first section flue blowout hole (22) of fixed first section flue lower annular tube, open fixed second section flue blowout hole (23) of fixed second section flue lower annular tube, open fixed third section flue blowout hole (11) of fixed third section flue lower annular tube;S4, close the inlet electric valve (19) of two middle pressure pumps (20) of middle pressure forced circulation, outlet electric valve (21);S5, open the steam regulating valve (3) of the steam drum (1) outside sending to regenerator.

The invention discloses a boiler water-vapor separation steam pocket, which belongs to the technical field of boilers and comprises a shell, a closed cavity is formed in the shell, a primary water-vapor separation device and a secondary water-vapor separation device are mounted in the cavity, the secondary water-vapor separation device is positioned above the primary water-vapor separation device, and a plurality of input pipes are arranged on the bottom wall of the shell at intervals. The bottom wall of the shell is further provided with a water outlet pipe, the inner opening end of the water outlet pipe is provided with an anti-vortex device, the top wall of the shell is provided with a plurality of air outlet pipes at intervals, and the inner opening end of each air outlet pipe is located above the second-stage water vapor separation device. And through multi-stage water-vapor separation, the steam dryness is greatly improved, and meanwhile, the good water circulation working condition can be guaranteed. In addition, the steam pocket is simple in structure and convenient to manufacture, install and overhaul.

The invention provides a water cooling wall device of a boiler, which comprises a water cooling wall main body, the water cooling wall main body is composed of two groups of boiler barrels in a parallel state, a plurality of groups of water cooling pipelines are communicated between the two groups of boiler barrels, and communicating holes are formed in the positions, in contact with the end parts of the water cooling pipelines, of the outer walls of the boiler barrels; a windward area is arranged at the position, making contact with smoke, of the front face of the outer wall of the water-cooling pipeline, the outer wall of the other side of the water-cooling pipeline is a leeward area, and anti-abrasion protection tiles used for protecting the water-cooling pipeline are assembled on the outer wall of the windward area. According to the embodiment, the water cooling pipeline is designed to be of the structure with the end face in the water drop shape, compared with a traditional round steel pipe, on the premise that the same liquid flow is kept, the windward area of the pipeline is greatly reduced, smoke can smoothly pass through gaps between the water cooling wall pipelines at the joint of the bypass flue and the furnace wall, and therefore the heat exchange efficiency is improved. And the cross section area through which flue gas can pass is effectively increased, so that the resistance and the energy consumption of the system are reduced.

The utility model discloses a fastening device for a steam pocket manhole door, the fastening device is used for fixedly welding a manhole cover, the fastening device comprises a panel, connecting plates and end reinforcing plates, the two ends of the panel are fixedly connected with the end reinforcing plates respectively, the connecting plates are fixedly installed on the two sides of the panel and the two sides of the end reinforcing plates respectively, and the connecting plates are fixedly connected with the panel. The two ends of the panel are each provided with a half-kidney-shaped hole used for being matched with installation of a fastening bolt of the manhole door. The utility model has simple and reasonable structure, can be matched with various steam pocket manhole doors to be installed and used, improves the stability of the whole structure through the combination of the panel, the end reinforcing plate and the internal reinforcing plate, has higher bearing capacity, and improves the service life of the steam pocket in the installation and operation process of the steam pocket. And a higher fastening load of a fastening bolt and an impact load generated in the operation process of equipment can be borne without falling off and deforming.

The utility model belongs to the technical field of power generation industrial equipment, and particularly relates to a fixing device for replacing an upper header of a waste heat boiler suspension type module, the fixing device comprises a supporting structure and an anti-roll structure, the supporting structure is arranged at the bottom of the specified suspension type module, and a base frame, an adjusting rib plate and a protection base plate form a whole; the adjusting rib plate is composed of a first height adjusting rib plate and a second height adjusting rib plate, and the first height adjusting rib plate and the second height adjusting rib plate are arranged at the joint of the base frame and the bottom of the specified suspended module to form a height-adjustable fulcrum; the anti-roll structure comprises a first structure part, a second structure part and a third structure part, and the front face of the suspension type module is connected with a shockproof support adjacent to the suspension type module in the waste heat boiler through the first structure part so as to prevent the suspension type module from roll or deviation. The device has the characteristic of preventing the suspended module from shifting after the upper header is cut and moved away.

The utility model provides a front evaporator for a boiler, which comprises an evaporator box body and an evaporation module, the evaporation module fixedly penetrates through the evaporator box body, high-temperature flue gas is introduced into the evaporator box body, the evaporation module comprises a first header, a second header and a plurality of evaporation pipes, the first collecting box and the second collecting box are fixedly installed on the two corresponding side faces of the evaporator box body, a plurality of water outlets are formed in the first collecting box, a plurality of water inlets are formed in the second collecting box, and the two ends of each evaporation pipe penetrate through the evaporator box body and communicate with the first collecting box and the second collecting box correspondingly; the first collecting box is higher than the second collecting box, water enters the second collecting box through the water inlet and enters the first collecting box through the multiple evaporation pipes, and high-temperature smoke makes contact with the evaporation pipes in the evaporator box so as to heat and evaporate water in the pipes. Through the design of the evaporation module and the cooperation of the evaporation module and the evaporator box body, the integrated front evaporator is provided, the structure is simple, and rapid installation and connection are facilitated.

The utility model relates to the technical field of fuel gas steam boxes, and discloses a fire tube type water tank for a fuel gas steam box, a fuel gas steam box cover and a fuel gas steam box shell are provided with fixing mechanisms, the water tank and the fuel gas steam box shell are provided with mounting mechanisms, each mounting mechanism comprises a moving assembly and a limiting assembly, each moving assembly comprises a limiting seat, and each limiting seat is provided with a limiting groove. The other sides of the springs are fixedly connected with moving plates, and the outer sides of the front and rear moving plates are fixedly connected with inserting blocks. According to the fire tube type water tank for the gas steam box, when a mounting seat moves, a moving seat can slide on the surface of a long rod until the moving seat drives an inserting rod to move out of an inserting hole groove, limitation on the position of a moving plate can be canceled, and when the moving plate is pushed to slide on the surface of a connecting rod in the later period to extrude a spring, the moving plate can drive an inserting block to move out of an inserting groove; the water tank can be taken out from the bottom end of the gas steam box shell, so that water resources in the water tank can be conveniently replaced in the later period, and meanwhile, scale on the inner wall of the water tank can be regularly treated.

The invention discloses a three-ladle water feeding flow limit value control method and system of a gas-steam combined cycle unit, and relates to the technical field of thermal control of the gas-steam combined cycle unit, the method comprises the following steps: obtaining inlet flows and outlet evaporation capacities of high, medium and low ladles in real time, and calculating net flows and total net flows of the ladles; calculating a flow static limit value setting according to a preset net flow fixed limit value of each packet, and generating a flow limit value margin in combination with the total net flow; and finally, the net flow fixed limit value of each packet is corrected according to the flow limit value allowance, and a self-adaptive limit value is generated, so that more accurate three-packet water feeding flow limit value control is realized. The problem that the dynamic working condition adaptability is insufficient due to the fact that an existing control strategy mostly adopts static methods such as flow average distribution, fixed proportion distribution or fixed limit value control is solved.

The invention discloses a waste heat boiler header convenient to assemble, and relates to the field of boilers, the waste heat boiler header convenient to assemble comprises a box body and a plurality of inlet and outlet pipes arranged on the box body, a communicating opening is formed in the inner side face of the box body, a butt joint groove communicated with the communicating opening is formed in the side face of the box body, and a connecting plate is embedded in the inner wall of the butt joint groove; the inlet and outlet pipes are installed on the connecting plate at equal intervals in the length direction of the connecting plate. And locking mechanisms located on the two sides of the butt joint groove are arranged on the surface of the box body and comprise cover plates installed at the two ends of the butt joint groove, and sliding grooves are formed in the cover plates. According to the waste heat boiler header convenient to assemble, the inlet and outlet pipe and the connecting plate are integrally arranged, so that under the cooperation effect of the locking mechanism, the waste heat boiler header can be conveniently and rapidly assembled, meanwhile, when the inlet and outlet pipe is damaged subsequently, the inlet and outlet pipe can be conveniently disassembled for maintenance, and the waste heat boiler header is more convenient to use.

This invention relates to the field of steam boiler technology, specifically a single-drum biomass steam boiler, comprising a furnace shell, a combustion structure, a heat exchange structure, a water circulation structure, a pipe structure, an installation structure, and a boiler drum body. The pipe structure can scrape away soot from the inner walls of the first and second pass flue pipes. Its rotating and opening / closing parts cooperate to close the flue gas passage during ash removal and automatically open it after cleaning, without interfering with the normal exhaust of the boiler. The installation structure allows for quick disassembly and assembly of the front and rear smoke boxes, improving the convenience of equipment maintenance. The waste heat treatment component uses the waste heat of the discharged flue gas to preheat the cold water in the inlet pipe, increasing the inlet water temperature and reducing the boiler drum heating energy consumption. The water circulation structure adopts a header, downcomer, and symmetrical water-cooled wall tube layout to form a circulation loop, avoiding local water shortage and overheating in the boiler drum. The combustion structure can agitate the biomass fuel in the combustion drawer to prevent accumulation and agglomeration, ensuring full contact between the fuel and air and improving the boiler's thermal efficiency.