557 results about "Superheater" patented technology

This invention discloses a supercritical carbon dioxide cycle generator set water spray desuperheating system, comprising a supercritical carbon dioxide cycle power generation system and a water spray desuperheating system; the supercritical carbon dioxide cycle power generation system includes a heater, a screen-type superheater, a final-stage superheater, and a turbine; the water spray desuperheating system includes a first desuperheating water injection point, a second desuperheating water injection point, and a liquid-water separation system; the heater outlet is sequentially connected to the turbine inlet via the first desuperheating water injection point, the screen-type superheater, the second desuperheating water injection point, and the final-stage superheater; the turbine outlet is connected to the inlet of the liquid-water separation system; the liquid outlet of the liquid-water separation system is connected to the first and second desuperheating water injection points; and the gas outlet of the liquid-water separation system is connected to the heater inlet. This system can solve various problems caused by carbon dioxide desuperheating.

The invention provides an energy gradient utilization steam Rankine cycle power generation system and method for nuclear fusion, and belongs to the field of nuclear fusion energy conversion and utilization. Different temperature heat of a cladding, a divertor and a vacuum chamber is guided into a high-temperature independent heat storage loop, a medium-temperature independent heat storage loop and a low-temperature independent heat storage loop respectively, an operation section stores heat, and a pause section releases heat; feed water is heated step by step through a multi-stage preheater, an evaporator and a superheater according to the sequence of low temperature, medium temperature and high temperature, and superheated steam of 550 DEG C is formed to continuously drive a turbine to generate power. Decoupling of intermittent output of the fusion reactor and continuous operation of the power generation system is achieved, steam extraction of a steam turbine is omitted, the structure is simplified, and the energy utilization rate and the circulation efficiency are improved.

The utility model provides a peak-shaving steam supply system for deep waste heat utilization of a thermoelectric unit, which deeply recovers cold end waste heat and flue gas waste heat of a cogeneration unit, is coupled with a two-stage compression heat pump, extracts waste heat to heat demineralized water, and serves as a primary heat source for supplying industrial steam, so that the waste heat participates in external heat supply; the superheater utilizes the generating capacity of the unit to enable industrial steam to reach steam supply parameters, the waste heat of the unit and the generating capacity are combined for external steam supply, the circulating heat efficiency is improved, the steam supply capacity is improved, meanwhile, the on-grid electricity is reduced, thermoelectric decoupling is achieved, the unit adjusting operation interval is expanded, the operation cost and pollutant emission are reduced, and peak regulation or spot transaction earnings are improved. And a clean, low-carbon, flexible, efficient, economical and energy-saving combined heat and power generation system is constructed.

The invention discloses a fused salt steam generation system and a control method thereof. A high-temperature molten salt tank, a salt feeding pump, a molten salt channel of a second-stage superheater, a molten salt channel of a first-stage superheater, a molten salt channel of an evaporator, a molten salt channel of a preheater and a low-temperature molten salt tank of the system are communicated in sequence; the water supply end, the water supply pump, a steam-water channel of the preheater, the steam pocket, the pressure regulating valve, a steam-water channel of the first-stage superheater, the water spraying and temperature reducing device, a steam-water channel of the second-stage superheater and the steam removal end are sequentially communicated, and a descending pipe and an ascending pipe of the steam pocket are communicated with a steam-water channel of the evaporator. The control method aims at the system. The method has the advantages that the steam pocket pressure is actively adjusted during load rising, the liquid working medium is flashed, a load instruction can be quickly responded, steam is stably generated according to the instruction and merged into the steam turbine, and the stability and safety of the steam turbine are improved; the steam pocket of the evaporation system is used as steam storage equipment, so that an independent steam storage pocket is prevented from being arranged in the evaporation system, the cost is reduced, and the control logic is simplified.

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.

The invention discloses a gas-liquid phase change compressed carbon dioxide energy storage system which comprises a gas storage unit, an energy storage unit, a liquid storage unit and an energy release unit which are sequentially connected in a closed loop mode, the energy release unit comprises a superheater, a high-pressure turbine, a reheater and a low-pressure turbine which are sequentially connected, and a second evaporator is arranged in an exhaust cylinder of the low-pressure turbine. The input end of the second evaporator is connected to the outlet end of the liquid storage unit, and the output end of the second evaporator is connected to the inlet end of the reheater. The second evaporator is configured to receive the liquid working medium from the liquid storage unit in the no-load starting stage of the energy release unit so that the liquid working medium can be evaporated and gasified, and therefore the exhaust temperature of the low-pressure turbine can be reduced, and the gaseous working medium formed through evaporation and gasification is input into the low-pressure turbine through the reheater to continue acting. Therefore, the risk of equipment damage caused by overhigh exhaust temperature during turbine operation is reduced, the exhaust heat of the turbine is recovered, the total air inflow of the turbine is reduced, and the overall efficiency of a system unit is improved.

The invention belongs to the technical field of alkane cracking processes, and provides an alkane raw material treatment device and method capable of efficiently recycling raw material cold energy, the alkane raw material treatment device comprises a gasification assembly, the gasification assembly comprises a throttle valve, the discharge end of the throttle valve is communicated with a cold end flow channel of a cold energy heat exchanger, and a hot end flow channel of the cold energy heat exchanger is circularly connected with a cold energy user; the gas-liquid separation assembly comprises a gas-liquid separation tank, a gas phase outlet of the gas-liquid separation tank is communicated with compression equipment, and a liquid phase outlet of the gas-liquid separation tank is communicated with a liquid alkane vaporizer; the raw material heating assembly comprises a raw material superheater, a feeding port of the raw material superheater is communicated with a discharging port of the compression equipment, and a discharging port of the raw material superheater is communicated with follow-up processing equipment. In the alkane gasification process, the alkane cooling capacity can be efficiently and stably recycled and utilized, and the purposes of reducing cost and improving efficiency can be achieved.

The invention provides a nickel-based protective coating as well as a preparation method and application thereof. The nickel-based protective coating comprises a Ni-Cr-Nb bonding layer and a Ni-Cr-Mo-W functional layer, the Ni-Cr-Nb bonding layer is prepared from, by mass, 58%-65% of Ni, 15%-22% of Cr, 2%-4% of Nb, 0.5%-1.5% of Ti and 0.05%-0.1% of rare earth elements. The Ni-Cr-Mo-W functional layer is prepared from, by mass, 52%-57% of Ni, 22%-25% of Cr, 4%-7% of Mo, 3%-5% of W, 0.8%-1.2% of B, 0.8%-1.3% of Si and 0.05%-0.12% of rare earth elements. The rare earth element comprises any one or a combination of at least two of Y, La, Ce or Gd. The nickel-based protective coating can be applied to a boiler superheater and a boiler reheater which serve under extreme working conditions such as high temperature of 600 DEG C or above, chlorine and sulfur synergistic corrosion and high-speed flue gas scouring for a long time, the service life of the boiler superheater and the boiler reheater is greatly prolonged, and the risk of unplanned shutdown is reduced.

The invention relates to a direct current furnace machine-furnace coordination system dynamic modeling method suitable for a wet condition. Based on the law of mass conservation and energy conservation, a lumped parameter method is adopted to construct a dynamic model comprising a coal pulverizing system, a coal economizer-water wall system, a water storage tank system, a superheater system and a steam turbine system; identifying parameters are optimized step by step by only utilizing unit variable load dynamic operation data and combining with the mechanism constraint that the heat absorption capacity of a working medium is monotonically increased along with the coal quantity as fired: static parameters are determined through dynamic data regression, nonlinear parameters are optimized based on a preset water-cooled wall outlet flow and dryness function structure, and the heat absorption capacity of the working medium is calculated. And finally, identifying dynamic parameters step by step by adopting an immune genetic algorithm. The dynamic characteristics and the physical consistency of the established model are verified through open-loop simulation, and the technical problems that dynamic description of the water level of the water storage tank is missing and the modeling precision is low under the wet working condition are solved.

The invention discloses a thermal power generating unit boiler wall temperature early warning method and device, and the method comprises the steps: determining a steady-state working condition according to boiler operation parameters; the boiler operation parameters comprise coal feeding quantity, water feeding quantity, primary air quantity and secondary air quantity; calculating the wall temperature change rate of each monitoring point in a preset time window; the time window is set according to a data smooth filtering requirement and an early warning response timeliness requirement, and the monitoring points comprise a superheater, a reheater and a water cooling wall; and if the wall temperature change rate of at least one monitoring point is greater than or equal to a preset early warning threshold value and the duration is greater than or equal to a corresponding time threshold value, executing a corresponding early warning strategy. Whether the boiler is in the steady-state operation state or not is recognized before early warning is triggered, so that wall temperature fluctuation interference in the normal dynamic process such as unit load adjustment and combustion working condition fine adjustment is eliminated, it is avoided that the normal working condition is misjudged to be abnormal, the early warning timeliness of the wall temperature of the boiler is improved, meanwhile, the misjudgment rate is reduced, and the early warning accuracy is improved.

The invention relates to a method for detecting microcracks on the inner wall of a wall enclosure superheater of a boiler. The method comprises the following steps: macroscopically identifying and preliminarily screening a high-risk area; creating an endoscope channel based on the primary suspicious area list and performing primary peeping on the inner wall; carrying out detection surface preparation and acoustic coupling optimization; data acquisition is carried out through accurate arrangement of the small-sound-velocity self-coupling phased array ultrasonic probe; extracting defect signal features and carrying out three-dimensional digital modeling; performing crack depth accurate quantization based on a time of flight diffraction mode; carrying out comprehensive data analysis and evaluating a security level; and integrating detection results, and generating a digital file based on the results. According to the invention, standardization of the detection process and systematization of data management can be realized, the detection efficiency and accuracy are greatly improved, a scientific basis is provided for equipment life prediction and maintenance decision, and the safe operation level of the boiler is effectively improved.

The invention discloses a multi-stage ammonia-doped combustion nitrogen and carbon reduction system for a coal-fired boiler. The system comprises an ammonia supply device and a boiler, the ammonia supply device is arranged on one outer side of the boiler; a pulverized coal burner, a pure ammonia burner, a first-stage ammonia gas multi-nozzle spray gun, a first-stage ammonia-hydrogen mixed gas multi-nozzle spray gun, a flue gas NOX concentration detector, a second-stage ammonia gas multi-nozzle spray gun, a second-stage ammonia-hydrogen mixed gas multi-nozzle spray gun and a platen superheater are arranged in the boiler; the ammonia supply device is respectively connected with the pure ammonia burner, the first-stage ammonia gas multi-nozzle spray gun, the first-stage ammonia-hydrogen mixed gas multi-nozzle spray gun, the second-stage ammonia gas multi-nozzle spray gun and the second-stage ammonia-hydrogen mixed gas multi-nozzle spray gun. According to the invention, the coal-fired unit is subjected to multi-stage blending combustion of ammonia gas and is provided with multi-stage SNCR denitration reaction zones, so that the replacement of zero-carbon fuel ammonia to coal is realized, the requirement on the concentration of nitrogen oxide in front of the inlet of the original SCR device of the unit is met, and a new way is provided for carbon emission reduction of a coal-fired boiler.

The invention relates to the technical field of industrial heat pumps, in particular to a transcritical CO2 circulation system capable of achieving 120 DEG C high-temperature heat tracing in a petroleum process and a control method of the transcritical CO2 circulation system. The circulating system comprises a water pump, a gas cooler, an air source evaporation part, a waste heat superheater and a compressor. The gas cooler, the air source evaporation component, the waste heat superheater and the compressor are sequentially connected, and the water pump is connected with the gas cooler. The water pump is used for providing to-be-heated water for the gas cooler; the gas cooler is used for heat exchange between the supercritical carbon dioxide working medium and water to be heated; the air source evaporation part is used for heat exchange between the external environment and the carbon dioxide working medium output by the gas cooler; the waste heat superheater is used for heat exchange between the waste heat resource and the carbon dioxide working medium output by the air source evaporation component; the compressor is used for compressing the carbon dioxide working medium output by the waste heat superheater to obtain the supercritical carbon dioxide working medium. According to the embodiment of the invention, the heat supply temperature and stability can be improved.

The embodiment of the present disclosure provides a molten salt-based gas-steam combined heat storage system and a capacity calculation method. The system comprises a gas turbine, a boiler, a gas heat exchanger, a steam heat exchanger, a high-temperature molten salt storage tank and a low-temperature molten salt storage tank. The outlet of the gas turbine is connected with the inlet of the flue of the boiler. The gas heat exchanger is connected with the flue between the gas turbine and the high-temperature reheater and the high-pressure superheater in the boiler. The steam heat exchanger is connected with the steam-water pipeline between the high-pressure superheater and the high-pressure drum and the low-pressure drum in the boiler. The low-temperature molten salt storage tank is connected with the high-temperature molten salt storage tank through a molten salt conveying pipeline. The molten salt conveying pipeline is sequentially connected with the steam heat exchanger and the gas heat exchanger. The low-temperature molten salt is heated to high-temperature molten salt when passing through the steam heat exchanger and the gas heat exchanger along the molten salt conveying pipeline. The system realizes reasonable distribution of steam flow and gas flow, significantly improves the heat exchange efficiency of the heat storage heat exchanger, improves the energy storage density per unit mass of the molten salt heat storage system, and reduces the cost.

The invention relates to an electric heating fused salt heat storage-heat supply system for quickly absorbing wind and light output fluctuation. The electric heating fused salt heat storage-heat supply system comprises a low-temperature fused salt tank, a high-temperature fused salt tank, a multi-stage electric heater array, a fused salt pump, a regulating valve, a switch valve, a temperature measuring point, a preheater, an evaporator, a superheater, a water supply pump, a water supply unit and a matched pipeline. The system adopts hierarchical control: a first-stage electric heater array operates at a constant flow within a set time so as to respond to power fluctuation from a second stage to a minute stage; and the second-stage electric heater array is used for coping with minute-level to hour-level power fluctuation by adjusting the flow of the molten salt and stabilizing the temperature of a molten salt outlet. In the occasion where the temperature of the high-temperature molten salt needs to be strictly controlled, the system can guarantee the temperature quality of the high-temperature molten salt by additionally arranging a molten salt loop. The heat sink effect of the molten salt in the low-temperature molten salt tank can effectively buffer temperature sudden change and stabilize a flow field. Qualified high-temperature fused salt can be continuously output under high-fluctuation electric energy input, and steam is stably supplied.

The invention relates to the technical field of physical engines, in particular to a boiler heat transfer inertia determination and boiler heat transfer inertia regulation and control analysis method and device, and the method comprises the following steps: discretizing a superheater tube wall and a header into Lagrange material points carrying mass, temperature and stress information according to the geometric structure and material physical property parameters of a boiler; according to the method, by analyzing the geometric structure and the material physical property parameters of the boiler, a heated part is dispersed into material points carrying mass, temperature and stress information, and coupling treatment is achieved in a grid covering a fluid domain and a solid domain, so that the heat transfer process can be continuously tracked on the global scale, and the heat transfer efficiency is improved. And by executing mapping between material point information and grid nodes under variable working conditions, distribution changes of momentum and energy can be synchronously obtained, and change results are returned and updated to the material points in real time, so that dynamic interaction of the position, the temperature and the stress is realized, and time sequence evolution of heat transfer inertia is described with higher precision.

This invention discloses a system for improving the efficiency of power generation and coupling heat supply using a gas-fired superheater with multiple steam sources. It belongs to the field of waste heat power generation technology in steel enterprises. To utilize waste heat steam sources of different qualities in steel enterprises for power generation, the system includes an electric furnace waste heat system (1), a converter waste heat system (2), a sintering waste heat system (3), a rolling mill heating furnace waste heat system (4), a steam storage tank (5), a gas-fired steam superheater (6), a power generation system (7), and a hot water storage tank (8). This system not only integrates waste heat steam sources of various parameters and qualities within the steel plant for power generation, but also recovers heat from the circulating cooling water of the generator set and supplies hot water externally, further improving the waste heat utilization rate.

This invention discloses a novel, low-load, high-efficiency thermoelectric decoupling heating system. The system is characterized by replacing the high-pressure bypass section with an extraction section. This extraction section extracts steam from the middle of the superheater and uses this steam to heat the secondary air or drive the induced draft fan. Compared to existing technologies, this invention, after heating the secondary air or driving the induced draft fan, returns the steam to the cold section, thus overcoming the problem of limited extraction capacity in conventional systems. It also allows for changes in the coal-to-water ratio within the boiler under low load conditions, increasing the outlet steam temperature of the superheater and reheater under low load conditions, and avoiding the widespread problem of underheating of main steam and hot reheat steam under low load conditions.

The utility model provides an electric power system based on fused salt energy storage power generation, which comprises a hot fused salt tank, a hot fused salt pump is arranged on one side of an outlet of the hot fused salt tank, a superheater and a reheater are arranged on one side of the hot fused salt pump, a preheating evaporator is arranged on one side of the superheater and one side of the reheater, and the preheating evaporator is arranged on one side of the hot fused salt tank. One side of the preheating evaporator is connected to a cold molten salt tank, a first heating pipeline and a second heating pipeline are arranged at an outlet of the cold molten salt tank, a first cold molten salt pump is arranged on the first heating pipeline, a first heating electric appliance is arranged on one side of the first cold molten salt pump, and a second heating electric appliance is arranged on the other side of the second cold molten salt pump. The second heating pipeline is provided with a second cold molten salt pump, and one side of the second cold molten salt pump is provided with a second electric heater. According to the scheme, the arrangement is flexible, the energy storage power generation capacity is determined according to the installed capacity of new energy, and wind energy is better consumed.

The invention discloses a non-freezing efficient cold energy recovery system and method for low-temperature liquid gasification, and the system comprises an evaporator which achieves the complete vaporization and overheating of a liquid phase through a plurality of recirculating air flows from the low-temperature liquid; the superheater is used for carrying out secondary heating on the vaporized gas by utilizing a thermal medium to generate first-stage high-temperature reflux; and the heat regenerator is used for carrying out reheating treatment on the cooled air flow after heat exchange is completed, so that the cooled air flow can reach a thermodynamic state that the cooled air flow can enter the evaporator again. The three parts of the system form a closed gas phase circulation structure, cold energy can be recycled in a multi-stage mode, low-temperature liquid is completely isolated from a thermal medium, and freezing is effectively avoided. By adjusting the cycle index and flow parameters, gas products with different temperatures can be output, available cooling heat media are generated at the same time, and the device is widely applied to the fields of LNG gasification, industrial refrigeration, cold-chain logistics and the like.

The invention relates to the technical field of tee joint repairing, and particularly discloses a final-stage superheater tee joint repairing device and method.The method comprises the steps that magnetic powder detection and phased array ultrasonic detection are adopted, defective weld joints of a final-stage superheater tee joint are detected, and the number, length and depth of crack defects are determined; on the basis of defect conditions detected in magnetic powder detection and phased array ultrasonic detection, a defect elimination mode is evaluated, and a U-shaped repair welding groove is prepared by polishing an area subjected to defect elimination; u-steel is adopted for fixing the positions, 2000 mm away from the two sides of a tee joint of the superheater tee joint collecting box, of the tee joint, and meanwhile a connecting pipe, connected with a main steam pipeline, of the tee joint is fixed to the position 300-350 mm away from a large cover wall; compared with the conventional single detection means, the combined detection mode of magnetic powder detection and phased array ultrasonic detection can comprehensively confirm the number, length, depth and specific position of crack defects, avoids the defect which is left in a detection blind area and is not cleared, and reduces the risk of secondary cracking after repair from the source.

The present application relates to a kind of tail flue and the flue gas outlet of combustion device are communicated boiler system and a kind of operation method of boiler system, the boiler system includes: boiler, is provided with heating surface, the heating surface includes the low-temperature superheater and / or low-temperature reheater being arranged in the tail flue of boiler;And combustion device, the combustion device is provided with combustion space independent of boiler furnace, the flue gas outlet of combustion space is communicated with tail flue, and the position communicated with tail flue is in the flow direction of boiler flue gas upstream low-temperature superheater and / or low-temperature reheater.The present application also relates to a kind of boiler-turbine equipment.

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.

This utility model discloses a regenerated steam superheating system for an energy-saving steam oven, including a superheater, a regenerated steam device, and a water supply pipeline. The superheater is equipped with a high-temperature, high-pressure steam outlet, and the regenerated steam device is equipped with a high-temperature, high-pressure steam inlet and a regenerated steam outlet. The high-temperature, high-pressure steam outlet is connected to both the high-temperature, high-pressure steam inlet and the water supply pipeline via a gas-liquid separator. The water supply pipeline is connected to the regenerated steam device, and the regenerated steam outlet is connected to the superheater. This utility model uses high-temperature, high-pressure steam as a heat source to heat the regenerated steam in the superheater, and separates the vapor phase of the high-temperature, high-pressure steam, returning it to the regenerated steam device for power steam recycling. The heated regenerated steam significantly reduces its moisture content while increasing its temperature. Compared with the prior art, the regenerated steam superheating system of this utility model produces steam with low moisture content and high temperature, meeting the specific process requirements of crispy noodle production.

The application discloses a steam temperature control method and device, a storage medium and an electronic device, relates to the technical field of control, and the method comprises the following steps: acquiring the current steam flow of a boiler, the current swing angle of a burner and the current flue gas temperature of a superheater inlet in a steam temperature control system of a thermal power plant; acquiring a superheater inlet and outlet enthalpy increase model; calculating the current steam flow, the current swing angle and the current flue gas temperature according to the superheater inlet and outlet enthalpy increase model to obtain the first inlet and outlet enthalpy increase of the superheater; calculating according to the first inlet and outlet enthalpy increase to obtain a target temperature value of the superheater inlet, and controlling the steam temperature of the superheater inlet according to the target temperature value. Through the application, the problem that the steam temperature is adjusted by a PID controller in the related art, resulting in relatively low accuracy of steam temperature control, is solved.

The application discloses a control system for inhibiting coking of a heating surface of a coal-fired boiler, and the control system comprises a first temperature measuring device for monitoring the flue gas temperature at the inlet of a partition screen superheater, a second temperature measuring device for monitoring the flue gas temperature at the inlet of a final-stage superheater, a third temperature measuring device for monitoring the flue gas temperature at the inlet of a final-stage reheater, and a nano-ceramic material spraying layer arranged on a water cooling wall; wherein, based on the initial temperature data monitored by the first temperature measuring device, the second temperature measuring device and the third temperature measuring device, the area of the nano-ceramic material spraying layer is set so that the water cooling wall has a suitable range of heat absorption, the flue gas temperature at the inlet of the partition screen superheater is T1, the flue gas temperature at the inlet of the final-stage superheater is T2, and the flue gas temperature at the inlet of the final-stage reheater is T3, thereby inhibiting the coking of the heating surface of the coal-fired boiler.

The invention relates to the field of oil field steam injection boiler equipment, in particular to a high-capacity subcritical coal-fired CFB type oil field steam injection boiler, the highest pressure of the boiler can reach subcritical pressure, the boiler comprises a steel frame, and a boiler barrel, a hearth water cooling wall and a flue are arranged on the steel frame. A superheater, an upper-level economizer, SCR equipment, a lower-level economizer and an air preheater are sequentially arranged on the flue, a softened water pipeline used for conveying oilfield sewage is arranged on the steel frame, the softened water pipeline is sequentially communicated with the lower-level economizer, the upper-level economizer and a bottom coil pipe of a hearth water cooling wall, and the middle and a top coil pipe of the hearth water cooling wall are communicated with a boiler barrel. A separating assembly used for separating saline water and steam is arranged in the boiler barrel, a steam pipeline is communicated between the top of the boiler barrel and the superheater, the bottom of the boiler barrel is communicated with a salt discharging pipe, and a pressure measuring piece used for monitoring pressure changes in a coil pipe is arranged on the coil pipe of the hearth water cooling wall. The method has the effect of reducing the equipment investment cost.

The present application relates to the technical field of noise reduction device, and particularly relates to a noise reduction structure and a waste heat boiler. The noise reduction structure is arranged on a superheater of the waste heat boiler, and comprises a noise reduction piece arranged on a finned tube of the superheater. The noise reduction piece is located at a leeward side of the finned tube and is arranged along the wind direction. The airflow itself has noise, and the airflow also generates a large noise when passing through the finned tube, so that the noise in the superheater is large. The noise reduction in the superheater can effectively reduce the overall noise of the waste heat boiler, so as to achieve the purpose of noise reduction of the waste heat boiler. Moreover, the noise reduction piece is arranged on the finned tube, compared with being arranged on the outside of the boiler body, the inside of the boiler body or the outside of the chimney, the installation and maintenance are more convenient, the material is saved, the cost is relatively low, and the overall performance of the waste heat boiler is not affected.

This utility model discloses a single-channel positive pressure gas waste heat boiler, specifically relating to the field of boiler technology. It includes a steam drum, a steam collector, a boiler body, and a pressure-bearing shell. The entire boiler body is housed within the circular pressure-bearing shell, while the steam drum and steam collector are located outside the shell and connected to the boiler body inside the shell via connecting pipes. The pipes are sealed at their penetration points into the shell. The boiler body is divided into upper and lower sections. The upper high-temperature zone is surrounded by a constant-temperature membrane water-cooled wall, while the lower low-temperature zone is constructed from welded steel plates. Two gas outlets connect the lower flue outlet to the pressure-bearing shell, forming a connecting layer. The inner wall of the pressure-bearing shell is insulated. A high-temperature superheater, a low-temperature superheater, and an evaporator are sequentially arranged at the top of the boiler body, while an economizer is arranged at the bottom. This utility model solves the problem of arranging the pressure-bearing and heating surfaces in traditional boilers, offering advantages such as reduced sealing difficulty, optimized heat exchange process, pressure balance, simplified insulation, and improved safety and energy efficiency.

The invention relates to the technical field of boiler equipment, in particular to a detachable layered shell electrode type boiler superheater which comprises a bottom frame, stand columns, coiled pipe discs, a mounting frame, a supporting frame, an air inlet pipe and an air outlet pipe, the bottom frame is of a square rigid structure, the stand columns are connected to the four corners of the bottom frame, and the coiled pipe discs are steam circulation pipe bundles; five coiled pipe discs are arranged in a layered mode in the vertical direction, the installation frame is assembled between the two symmetrical stand columns in a sliding mode, the supporting frames are arranged in a layered mode in a pairwise opposite attaching mode and support and limit the coiled pipe discs on each layer, and arc-shaped grooves are formed in the installation frame at intervals. The coiled pipe disc adopts a layered detachable design and is independently limited and fixed by the mounting rack, when the outer wall of the pipe disc is coked or accumulated with dust, the connection can be conveniently removed, and the mounting rack can be disassembled along the upright post, so that the single-layer or multi-layer pipe disc can be independently cleaned or replaced, the maintenance difficulty and the workload are obviously reduced, and the working efficiency is improved. And the long-term heat exchange efficiency and the operation safety of the superheater can be effectively ensured.