CN219414720U - Supercritical gas boiler with evaporation screen - Google Patents
Supercritical gas boiler with evaporation screen Download PDFInfo
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- CN219414720U CN219414720U CN202320232303.0U CN202320232303U CN219414720U CN 219414720 U CN219414720 U CN 219414720U CN 202320232303 U CN202320232303 U CN 202320232303U CN 219414720 U CN219414720 U CN 219414720U
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Abstract
The utility model relates to a supercritical gas boiler with an evaporation screen, and belongs to the technical field of electric power and thermal energy. The problems that the phenomenon of poor steam-water separation effect easily occurs during low-load operation, superheated steam is brought with water, and the safe operation of a boiler is affected are solved. The system comprises an economizer system, a water-cooled wall system, an evaporation screen system, a superheater system and a reheater system, wherein the economizer system, the water-cooled wall system, the evaporation screen system and the superheater system are sequentially connected, and the superheater system is connected with the reheater system through a steam turbine. The utility model improves the outlet steam temperature of the supercritical gas boiler burning the low-calorific-value fuel, ensures good steam-water separation effect, ensures safe and stable operation of the boiler, improves safety and economy, and has good application prospect.
Description
Technical Field
The utility model relates to a supercritical gas boiler, and belongs to the technical field of electric power and thermal energy.
Background
The safe operation of the boiler is always a long-term concern in the fields of electric power and thermal energy, the supercritical gas boiler burning low-heat-value fuel has the advantages that due to the inherent characteristics of the fuel, the theoretical combustion temperature is low, the heat absorption capacity of a water-cooled wall of a hearth evaporation heating surface is low, when the boiler operates under the BMCR working condition, the outlet steam temperature of a separator is about 390 ℃, the critical point temperature of water is 374 ℃, the allowance is small, and the phenomenon of poor steam-water separation effect is easy to occur during low-load operation, so that superheated steam is brought with water to influence the safe operation of the boiler.
Therefore, there is a need to provide a supercritical gas boiler with an evaporation screen to solve the above technical problems.
Disclosure of Invention
The utility model solves the problems that the phenomenon of poor steam-water separation effect easily occurs during low-load operation, so that superheated steam brings water and affects the safe operation of a boiler. The following presents a simplified summary of the utility model in order to provide a basic understanding of some aspects of the utility model. It should be understood that this summary is not an exhaustive overview of the utility model. It is not intended to identify key or critical elements of the utility model or to delineate the scope of the utility model.
The technical scheme of the utility model is as follows:
the supercritical gas boiler with the evaporation screen comprises an economizer system, a water-cooled wall system, an evaporation screen system, a superheater system and a reheater system, wherein the economizer system, the water-cooled wall system, the evaporation screen system and the superheater system are sequentially connected, and the superheater system is connected with the reheater system through a steam turbine.
Preferably: the economizer system comprises a lower-stage economizer inlet header, a lower-stage economizer tube panel, a lower-stage economizer outlet header, an economizer connecting pipe, an upper-stage economizer inlet header, an upper-stage economizer tube panel, an upper-stage economizer outlet header and an economizer descending pipe, wherein the lower-stage economizer tube panel is connected with the upper-stage economizer tube panel through the economizer connecting pipe, the upper-stage economizer tube panel is connected with the water-cooled wall system, the lower-stage economizer inlet header and the lower-stage economizer outlet header are respectively arranged at two ends of the lower-stage economizer tube panel, the upper-stage economizer inlet header and the upper-stage economizer outlet header are respectively arranged at two ends of the upper-stage economizer tube panel, the lower-stage economizer outlet header is connected with the upper-stage economizer inlet header through the economizer connecting pipe, and the upper-stage economizer outlet header is connected with the water-cooled wall system through the economizer descending pipe.
Preferably: the lower-level economizer tube panels and the upper-level economizer tube panels are arranged in sequence, and the lower-level economizer tube panels and the upper-level economizer tube panels adopt light tubes or fin tubes.
Preferably: the water-cooling wall system comprises a water-cooling wall inlet header, a spiral pipe ring water-cooling wall, a water-cooling wall middle header, a vertical pipe ring water-cooling wall, a water-cooling wall outlet header, a side wall outlet small header, a partition wall inlet header, a partition wall pipe, a partition wall outlet header, an external furnace suspension pipe inlet header, an external furnace suspension pipe, an internal furnace suspension pipe inlet header, an internal furnace suspension pipe and an internal furnace suspension pipe outlet header, wherein the water-cooling wall inlet header, the spiral pipe ring water-cooling wall, the water-cooling wall middle header and the vertical pipe ring water-cooling wall are sequentially connected, the water-cooling wall inlet header is connected with a coal economizer downcomer, the vertical pipe ring water cooling wall is respectively connected with a water cooling wall outlet header and a side wall outlet small header, the water cooling wall outlet header is connected with an external hanging pipe inlet header, an external hanging pipe and an internal hanging pipe inlet header, the side wall outlet small header, a partition wall inlet header, a partition wall pipe, a partition wall outlet header, an external hanging pipe inlet header, an external hanging pipe and an internal hanging pipe inlet header, the internal hanging pipe and the internal hanging pipe outlet header are sequentially connected, and the internal hanging pipe outlet header is connected with the evaporation screen system.
Preferably: the evaporation screen system comprises an evaporation screen inlet header, an evaporation screen and an evaporation screen outlet header, wherein the evaporation screen inlet header and the evaporation screen outlet header are respectively arranged at two ends of the evaporation screen, and the in-furnace suspension pipe outlet header is connected with the evaporation screen inlet header.
Preferably: the superheater system comprises a low-temperature superheater inlet header, a low-temperature superheater tube panel, a low-temperature superheater outlet header, a low-temperature superheater-to-panel superheater tube panel, a superheater primary desuperheater, a panel-type superheater inlet header, a panel-type superheater tube panel, a panel-type superheater outlet header, a panel-type superheater-to-high-temperature superheater tube panel, a superheater secondary desuperheater, a high-temperature superheater inlet header, a high-temperature superheater tube panel, a low-temperature superheater outlet header, a low-temperature superheater-to-panel superheater tube panel, a low-temperature superheater tube panel, a panel-type superheater outlet header, a panel-type superheater-to-high-temperature superheater tube panel, a high-temperature superheater outlet header are sequentially connected, a low-temperature superheater-to-panel-type superheater primary desuperheater tube panel is arranged on the panel-type superheater-to-high-temperature superheater tube panel, a superheater secondary desuperheater panel is arranged on the panel-type superheater-to-high-temperature superheater tube panel, a low-temperature superheater-outlet header is connected with a low-temperature superheater inlet header, a high-temperature superheater inlet and a high-temperature superheater tube panel, a high-temperature superheater inlet is connected with a high-temperature cylinder system.
Preferably: the reheater system comprises a low-temperature reheater inlet header, a low-temperature reheater tube panel, a low-temperature reheater outlet header, a low-temperature reheater-to-high-temperature reheater connecting tube, a high-temperature reheater inlet header, a high-temperature reheater tube panel and a high-temperature reheater outlet header, wherein the low-temperature reheater inlet header, the low-temperature reheater tube panel, the low-temperature reheater outlet header, the low-temperature reheater-to-high-temperature reheater connecting tube, the high-temperature reheater inlet header, the high-temperature reheater tube panel and the high-temperature reheater outlet header are sequentially connected, a reheater desuperheater is arranged on the low-temperature reheater-to-high-temperature reheater connecting tube, and the high-temperature superheater outlet header is connected with a medium pressure cylinder of the steam turbine.
Preferably: the system also comprises a starting system, wherein the starting system comprises an integrated separator water storage tank, an atmospheric expansion container and a drain tank, the evaporation screen system, the integrated separator water storage tank and the superheater system are sequentially connected, and the integrated separator water storage tank, the atmospheric expansion container and the drain tank are sequentially connected.
Preferably: the flue outlet side of the flue gas and air system is provided with an economizer system, the flue gas and air system comprises a lower hearth, an upper hearth, a horizontal flue, a vertical flue and a flue gas baffle, the lower hearth, the upper hearth, the horizontal flue and the vertical flue are sequentially connected, and the inlet of the horizontal flue is provided with the flue gas baffle; the low-temperature superheater inlet header, the low-temperature superheater tube panel and the low-temperature superheater outlet header are arranged on one side of the upper hearth, and the low-temperature reheater inlet header, the low-temperature reheater tube panel and the low-temperature reheater outlet header are arranged on the other side of the upper hearth.
The utility model has the following beneficial effects:
the utility model improves the steam temperature of the outlet of the supercritical gas boiler burning the low-calorific-value fuel, ensures good steam-water separation effect, ensures safe and stable operation of the boiler, ensures that the steam parameters of the main steam outlet reach rated parameters, improves the operation safety and economy of the boiler, and has good application prospect.
Drawings
FIG. 1 is a schematic structural view of a supercritical gas boiler with an evaporation screen;
FIG. 2 is a schematic structural view of the economizer system;
FIG. 3 is a schematic diagram of a water wall system;
FIG. 4 is a schematic view of the structure of the evaporation screen system;
FIG. 5 is a schematic structural view of a superheater system;
FIG. 6 is a schematic structural view of a reheater system;
FIG. 7 is a schematic diagram of a smoke system;
fig. 8 is a schematic diagram of an arrangement of an integrated separator reservoir, atmospheric diffuser and hydrophobic tank.
In the figure: 1-economizer system, 2-water-cooled wall system, 3-evaporation screen system, 4-superheater system, 5-reheater system, 6-start system, 7-combustion system, 8-flue gas system, 9-lower economizer inlet header, 10-lower economizer tube panel, 11-lower economizer outlet header, 12-economizer connecting tube, 13-upper economizer inlet header, 14-upper economizer tube panel, 15-upper economizer outlet header, 16-economizer downcomer, 17-water-cooled wall inlet header, 18-spiral tube coil water-cooled wall, 19-water-cooled wall intermediate header, 20-vertical tube coil water-cooled wall, 21-water-cooled wall outlet header, 22-side wall outlet small header, 23-inlet header, 24-partition wall tube, 25-partition wall outlet header, 26-external hanging pipe, 27-internal hanging pipe inlet header, 28-internal hanging pipe, 29-internal hanging pipe outlet header, 30-evaporation screen inlet header, 31-evaporation screen, 32-evaporation screen outlet header, 33-low temperature superheater inlet header, 34-low temperature superheater pipe screen, 35-low temperature superheater outlet header, 36-low temperature superheater to screen superheater connecting pipe, 37-superheater primary desuperheater, 38-screen superheater inlet header, 39-screen superheater pipe screen, 40-screen superheater outlet header, 41-screen superheater to high temperature superheater connecting pipe, 42-superheater secondary desuperheater, 43-high temperature superheater inlet header, 44-high temperature superheater tube panel, 45-high temperature superheater outlet header, 46-low temperature reheater inlet header, 47-low temperature reheater tube panel, 48-low temperature reheater outlet header, 49-low temperature reheater to high temperature reheater connecting tube, 50-reheater desuperheater, 51-high temperature reheater inlet header, 52-high temperature reheater tube panel, 53-high temperature reheater outlet header, 54-lower furnace, 55-upper furnace, 56-horizontal flue, 57-denitration reactor, 58-vertical flue, 59-air preheater, 60-flue gas baffle, 61-outside hanging tube inlet header, 62-integrated separator water storage tank, 63-atmospheric expansion vessel, 64-hydrophobic tank.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The first embodiment is as follows: 1-8, the supercritical gas boiler with the evaporation screen in the embodiment comprises an economizer system 1, a water-cooled wall system 2, an evaporation screen system 3, a superheater system 4 and a reheater system 5, wherein the economizer system 1, the water-cooled wall system 2, the evaporation screen system 3 and the superheater system 4 are sequentially connected, working medium is introduced into a turbine high-pressure cylinder from a superheater outlet, working is performed in the turbine high-pressure cylinder, then introduced into a boiler reheater system 5 from a turbine high-pressure cylinder outlet, and working is introduced into the turbine medium-pressure cylinder from a reheater system 5 outlet; the utility model improves the steam temperature of the outlet of the supercritical gas boiler burning the low-calorific-value fuel, meets the requirements of the outlet parameters of the boiler, can improve the temperature by about 20 ℃, improves the safety and the economical efficiency of the operation of the boiler, and has good application prospect.
The economizer system 1 comprises a lower-stage economizer inlet header 9, a lower-stage economizer tube panel 10, a lower-stage economizer outlet header 11, an economizer connecting pipe 12, an upper-stage economizer inlet header 13, an upper-stage economizer tube panel 14, an upper-stage economizer outlet header 15 and an economizer descending pipe 16, wherein the lower-stage economizer tube panel 10 is connected with the upper-stage economizer tube panel 14 through the economizer connecting pipe 12, the upper-stage economizer tube panel 14 is connected with the water-cooled wall system 2, the lower-stage economizer inlet header 9 and the lower-stage economizer outlet header 11 are respectively arranged at two ends of the lower-stage economizer tube panel 10, the upper-stage economizer inlet header 13 and the upper-stage economizer outlet header 15 are respectively arranged at two ends of the upper-stage economizer tube panel 14, the lower-stage economizer outlet header 11 is connected with the upper-stage economizer inlet header 13 through the economizer connecting pipe 12, and the upper-stage economizer outlet header 15 is connected with the water-cooled wall system 2 through the economizer descending pipe 16; boiler feed water enters the inlet header 9 of the lower-stage economizer, flows through the pipe screen 10 of the lower-stage economizer, flows from the outlet header 11 of the lower-stage economizer to the inlet header 13 of the upper-stage economizer, flows through the pipe screen 14 of the upper-stage economizer, is led out from the outlet header 15 of the upper-stage economizer, and is led into the water-cooled wall system 2 from top to bottom through the down pipe 16 of the economizer.
The lower-stage economizer tube panels 10 and the upper-stage economizer tube panels 14 are arranged in line, and the lower-stage economizer tube panels 10 and the upper-stage economizer tube panels 14 adopt light tubes or fin tubes.
The water-cooled wall system 2 comprises a water-cooled wall inlet header 17, a spiral pipe ring water-cooled wall 18, a water-cooled wall middle header 19, a vertical pipe ring water-cooled wall 20, a water-cooled wall outlet header 21, a side wall outlet small header 22, a partition wall inlet header 23, a partition wall pipe 24, a partition wall outlet header 25, an external furnace suspension pipe 26, an internal furnace suspension pipe inlet header 27, an internal furnace suspension pipe 28, an internal furnace suspension pipe outlet header 29, wherein the outlet of the water-cooled wall inlet header 17, the spiral pipe ring water-cooled wall 18, the water-cooled wall middle header 19 and the inlet of the vertical pipe ring water-cooled wall 20 are sequentially connected, the inlet of the water-cooled wall inlet header 17 is connected with the outlet of the economizer downcomer 16, the outlet of the vertical pipe ring water-cooled wall 20 is respectively connected with the water-cooled wall outlet header 21 and the side wall outlet small header 22, the water-cooled wall outlet header 21 is sequentially connected with the external furnace suspension pipe inlet header 61, the external furnace suspension pipe 26, the internal furnace suspension pipe inlet header 27, the side wall outlet small header 22, the partition wall inlet header 23, the partition wall pipe 24, the partition wall outlet header 25 and the internal furnace suspension pipe inlet header 27 are sequentially connected with the internal furnace suspension pipe inlet header 27; the working medium is led into the spiral pipe coil water-cooling wall 18 by the water-cooling wall inlet header 17, then enters the water-cooling wall middle header 19, is led out by the vertical pipe coil water-cooling wall 20 after being mixed by the water-cooling wall middle header 19, part of the working medium of the vertical pipe coil water-cooling wall 20 sequentially enters the external suspension pipe inlet header 61 through the water-cooling wall outlet header 21, the external suspension pipe 26 and the internal suspension pipe inlet header 27, the other part of the working medium of the vertical pipe coil water-cooling wall 20 sequentially flows through the side wall outlet small header 22, the partition wall inlet header 23, the partition wall pipe 24 and the partition wall outlet header 25, sequentially enters the external suspension pipe inlet header 61, the external suspension pipe 26 and the internal suspension pipe inlet header 27, sequentially flows through the internal suspension pipe 28 and the internal suspension pipe outlet header 29, and the working medium of the internal suspension pipe outlet header 29 enters the evaporation screen system 3.
The evaporation screen system 3 comprises an evaporation screen inlet header 30, an evaporation screen 31 and an evaporation screen outlet header 32, wherein the evaporation screen inlet header 30 and the evaporation screen outlet header 32 are respectively arranged at two ends of the evaporation screen 31, and the outlet of the in-furnace suspension pipe outlet header 29 is connected with the inlet of the evaporation screen inlet header 30; the working medium enters the steam-water separator to carry out steam-water separation after being heated by the evaporation screen, the evaporation screen system 3 can raise the temperature of the working medium led out by the water-cooled wall system 2 by about 20 ℃, so that good steam-water separation effect is ensured, safe and stable operation of the boiler is ensured, meanwhile, the steam parameters of the main steam outlet are ensured to reach rated parameters, the operation safety and economy of the boiler are improved, and the method has good application prospect.
The superheater system 4 includes a low temperature superheater inlet header 33, a low temperature superheater tube panel 34, a low temperature superheater outlet header 35, a low temperature superheater to screen superheater connecting tube 36, a superheater primary attemperator 37, a screen superheater inlet header 38, a screen superheater tube panel 39, a screen superheater outlet header 40, a screen superheater to high temperature superheater connecting tube 41, a superheater secondary attemperator 42, a high temperature superheater inlet header 43, a high temperature superheater tube panel 44 and a high temperature superheater outlet header 45, the low-temperature superheater inlet header 33, the low-temperature superheater tube panel 34, the low-temperature superheater outlet header 35, the low-temperature superheater-to-panel superheater connecting tube 36, the panel-type superheater inlet header 38, the panel-type superheater tube panel 39, the panel-type superheater outlet header 40, the panel-type superheater-to-high-temperature superheater connecting tube 41, the high-temperature superheater inlet header 43, the high-temperature superheater tube panel 44 and the high-temperature superheater outlet header 45 are sequentially connected, the low-temperature superheater-to-panel superheater connecting tube 36 is provided with a superheater primary attemperator 37, the panel-type superheater-to-high-temperature superheater connecting tube 41 is provided with a superheater secondary attemperator 42, the evaporator-panel inlet header 30 outlet is connected with a separator inlet, the separator outlet is connected with the low-temperature superheater inlet header 33, and the high-temperature superheater outlet header 45 outlet is connected with the reheater system 5; the working medium is led to the low-temperature superheater inlet header 33 through the separator, is heated through the low-temperature superheater tube panel 34, flows through the superheater primary attemperator 37, is heated through the superheater secondary attemperator 42 after being heated through the superheater tube panel 39, and finally enters the high-pressure cylinder of the steam turbine after being heated through the high-temperature superheater tube panel 44.
The reheater system 5 comprises a low-temperature reheater inlet header 46, a low-temperature reheater tube panel 47, a low-temperature reheater outlet header 48, a low-temperature reheater-to-high-temperature reheater connecting tube 49, a high-temperature reheater inlet header 51, a high-temperature reheater tube panel 52 and a high-temperature reheater outlet header 53, wherein the low-temperature reheater inlet header 46, the low-temperature reheater tube panel 47, the low-temperature reheater outlet header 48, the low-temperature reheater-to-high-temperature reheater connecting tube 49, the high-temperature reheater inlet header 51, the high-temperature reheater tube panel 52 and the high-temperature reheater outlet header 53 are sequentially connected, a reheater attemperator 50 is arranged on the low-temperature reheater-to-high-temperature reheater connecting tube 49, an outlet header 45 is connected with the low-temperature reheater inlet header 46, an outlet of the high-temperature superheater outlet header 45 is connected with a steam turbine inlet, and a steam turbine outlet is connected with the low-temperature reheater inlet header 46; the working medium from the steam turbine exhaust is heated by the low-temperature reheater tube panel 47, flows through the reheater desuperheater 50, enters the high-temperature reheater tube panel 52, is heated and is led out to enter the steam turbine intermediate pressure cylinder.
The system also comprises a starting system 6, wherein the starting system 6 comprises an integrated separator water storage tank 62, an atmospheric expansion vessel 63 and a drain tank 64, the direct current operation stage evaporation screen system 3, the integrated separator water storage tank 62 and the superheater system 4 are sequentially connected, and the starting stage integrated separator water storage tank 62, the atmospheric expansion vessel 63 and the drain tank 64 are sequentially connected.
The flue gas treatment device comprises a flue gas treatment system, and is characterized by further comprising a flue gas system 8, wherein an economizer system 1 is arranged at the flue outlet side of the flue gas system 8, the flue gas system 8 comprises a lower hearth 54, an upper hearth 55, a horizontal flue 56, a vertical flue 58 and a flue gas baffle 60, the lower hearth 54, the upper hearth 55, the horizontal flue 56 and the vertical flue 58 are sequentially connected, the lower hearth 54 is surrounded by a spiral pipe ring water-cooled wall 18, the upper hearth 55 is surrounded by a vertical pipe ring water-cooled wall 20 and a partition pipe 24, the flue gas baffle 60 is arranged at the inlet of the horizontal flue 56, a denitration reactor 57 is arranged between the horizontal flue 56 and the vertical flue 58, a lower-stage economizer pipe screen 10 and an upper-stage economizer pipe screen 14 are respectively arranged at the inlet and outlet of the denitration reactor 57, and an air preheater 59 is arranged at the end part of the vertical flue 58; the low-temperature superheater inlet header 33, the low-temperature superheater tube panel 34 and the low-temperature superheater outlet header 35 are arranged on one side of the upper hearth 55, the low-temperature reheater inlet header 46, the low-temperature reheater tube panel 47 and the low-temperature reheater outlet header 48 are arranged on the other side of the upper hearth 55, and the baffle 28 can adjust the flue gas proportion on two sides of the upper hearth 55 so as to regulate the temperature; after combustion, high temperature flue gas is generated and enters the lower hearth 54, and flows through the screen superheater 39, the high temperature superheater 44, the high temperature reheater 52, the low temperature superheater 34 and the low temperature reheater 47 in the upper hearth 55, the evaporation screen 31, the horizontal flue 56 flue gas baffle 60, the upper-level economizer 14 in the vertical flue 58, the denitration reactor 57 and the air preheater 59.
It should be noted that, in the above embodiments, as long as the technical solutions that are not contradictory can be arranged and combined, those skilled in the art can exhaust all the possibilities according to the mathematical knowledge of the arrangement and combination, so the present utility model does not describe the technical solutions after the arrangement and combination one by one, but should be understood that the technical solutions after the arrangement and combination have been disclosed by the present utility model.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (9)
1. The utility model provides a take supercritical gas boiler of evaporation screen which characterized in that: the system comprises an economizer system (1), a water-cooled wall system (2), an evaporation screen system (3), a superheater system (4) and a reheater system (5), wherein the economizer system (1), the water-cooled wall system (2), the evaporation screen system (3) and the superheater system (4) are sequentially connected, and the superheater system (4) is connected with the reheater system (5) through a steam turbine.
2. The supercritical gas boiler with an evaporation screen according to claim 1, wherein: the economizer system (1) comprises a lower-stage economizer inlet header (9), a lower-stage economizer tube panel (10), a lower-stage economizer outlet header (11), an economizer connecting tube (12), an upper-stage economizer inlet header (13), an upper-stage economizer tube panel (14), an upper-stage economizer outlet header (15) and an economizer descending tube (16), wherein the lower-stage economizer tube panel (10) is connected with the upper-stage economizer tube panel (14) through the economizer connecting tube (12), the upper-stage economizer tube panel (14) is connected with a water-cooled wall system (2), the lower-stage economizer inlet header (9) and the lower-stage economizer outlet header (11) are respectively arranged at two ends of the lower-stage economizer tube panel (10), the upper-stage economizer inlet header (13) and the upper-stage economizer outlet header (15) are respectively arranged at two ends of the upper-stage economizer tube panel (14), the lower-stage economizer outlet header (11) and the upper-stage economizer inlet header (13) are connected with the upper-stage economizer inlet header (12) through the upper-stage economizer connecting tube (12), and the lower-stage economizer outlet header (15) is connected with the water-cooled wall system (2).
3. The supercritical gas boiler with an evaporation screen according to claim 2, wherein: the lower-level economizer tube panels (10) and the upper-level economizer tube panels (14) are arranged in sequence, and the lower-level economizer tube panels (10) and the upper-level economizer tube panels (14) adopt light tubes or fin tubes.
4. The supercritical gas boiler with an evaporation screen according to claim 2, wherein: the water-cooled wall system (2) comprises a water-cooled wall inlet header (17), a spiral pipe ring water-cooled wall (18), a water-cooled wall middle header (19), a vertical pipe ring water-cooled wall (20), a water-cooled wall outlet header (21), a side wall outlet small header (22), a partition wall inlet header (23), partition wall pipes (24), a partition wall outlet header (25), an external furnace suspension pipe inlet header (61), an external furnace suspension pipe (26) and an internal furnace suspension pipe inlet header (27), an internal furnace suspension pipe (28), an internal furnace suspension pipe outlet header (29), wherein the water-cooled wall inlet header (17), the spiral pipe ring water-cooled wall (18), the water-cooled wall middle header (19) and the vertical pipe ring water-cooled wall (20) are sequentially connected, the water-cooled wall inlet header (17) is connected with a coal economizer downcomer (16), the vertical pipe ring water-cooled wall (20) is respectively connected with the water-cooled wall outlet header (21), the side wall outlet small header (22), the water-cooled wall outlet header (21) is connected with the external furnace suspension pipe inlet header (61), the external furnace suspension pipe (26), the external furnace suspension pipe (27), the internal furnace suspension pipe (27), the external furnace suspension pipe (24), the external furnace suspension pipe (25), the partition wall (25) and the external furnace suspension pipe (25) The in-furnace suspension pipe inlet header (27) is connected, the in-furnace suspension pipe inlet header (27), the in-furnace suspension pipe (28) and the in-furnace suspension pipe outlet header (29) are sequentially connected, and the in-furnace suspension pipe outlet header (29) is connected with the evaporation screen system (3).
5. The supercritical gas boiler with an evaporation screen according to claim 4, wherein: the evaporation screen system (3) comprises an evaporation screen inlet header (30), an evaporation screen (31) and an evaporation screen outlet header (32), wherein the evaporation screen inlet header (30) and the evaporation screen outlet header (32) are respectively arranged at two ends of the evaporation screen (31), and the in-furnace suspension pipe outlet header (29) is connected with the evaporation screen inlet header (30).
6. The supercritical gas boiler with an evaporation screen according to claim 5, wherein: the superheater system (4) comprises a low-temperature superheater inlet header (34), a low-temperature superheater tube panel (34), a low-temperature superheater outlet header (35), a low-temperature superheater-to-panel superheater connecting tube (36), a superheater primary desuperheater (37), a panel-type superheater inlet header (38), a panel-type superheater tube panel (39), a panel-type superheater outlet header (40), a panel-type superheater-to-high-temperature superheater connecting tube (41), a superheater secondary desuperheater (42), a high-temperature superheater inlet header (43), a high-temperature superheater tube panel (44) and a high-temperature superheater outlet header (45), wherein the low-temperature superheater inlet header (33), the low-temperature superheater tube panel (34), the low-temperature superheater outlet header (35), the low-temperature superheater-to-panel superheater connecting tube (36), the panel-type superheater inlet header (38), the panel-type superheater tube panel (39), the panel-type superheater outlet header (40), the panel-type superheater-to-high-temperature superheater connecting tube (41), the high-temperature superheater inlet header (43), the high-temperature superheater tube panel (44), the high-temperature superheater outlet (45) and the panel-type superheater primary desuperheater (36) are sequentially connected to the panel-type superheater tube (41), the evaporation screen inlet header (30) is connected with the low-temperature superheater inlet header (33), and the high-temperature superheater outlet header (45) is connected with the high-pressure cylinder of the steam turbine.
7. The supercritical gas boiler with an evaporation screen according to claim 6, wherein: the reheater system (5) comprises a low-temperature reheater inlet header (46), a low-temperature reheater tube panel (47), a low-temperature reheater outlet header (48), a low-temperature reheater-to-high-temperature reheater connecting tube (49), a high-temperature reheater inlet header (51), a high-temperature reheater tube panel (52) and a high-temperature reheater outlet header (53), wherein the low-temperature reheater inlet header (46), the low-temperature reheater tube panel (47), the low-temperature reheater outlet header (48), the low-temperature reheater-to-high-temperature reheater connecting tube (49), the high-temperature reheater inlet header (51), the high-temperature reheater tube panel (52) and the high-temperature reheater outlet header (53) are sequentially connected, a reheater attemperator (50) is arranged on the low-temperature reheater connecting tube (49), and the high-temperature superheater outlet header (45) is connected with the low-temperature reheater inlet header (46).
8. The supercritical gas boiler with an evaporation screen according to claim 7, wherein: the system also comprises a starting system (6), wherein the starting system (6) comprises an integrated separator water storage tank (62), an atmospheric expansion vessel (63) and a drain tank (64), the evaporation screen system (3), the integrated separator water storage tank (62) and the superheater system (4) are sequentially connected, and the integrated separator water storage tank (62), the atmospheric expansion vessel (63) and the drain tank (64) are sequentially connected.
9. The supercritical gas boiler with an evaporation screen according to claim 7, wherein: the flue gas treatment device comprises a flue gas treatment system, and is characterized by further comprising a flue gas system (8), wherein an economizer system (1) is arranged at the flue outlet side of the flue gas system (8), the flue gas system (8) comprises a lower furnace chamber (54), an upper furnace chamber (55), a horizontal flue (56), a vertical flue (58) and a flue gas baffle (60), the lower furnace chamber (54), the upper furnace chamber (55), the horizontal flue (56) and the vertical flue (58) are sequentially connected, and a flue gas baffle (60) is arranged at the inlet of the horizontal flue (56); the low-temperature superheater inlet header (33), the low-temperature superheater tube panel (34) and the low-temperature superheater outlet header (35) are arranged on one side of the upper hearth (55), and the low-temperature reheater inlet header (46), the low-temperature reheater tube panel (47) and the low-temperature reheater outlet header (48) are arranged on the other side of the upper hearth (55).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320232303.0U CN219414720U (en) | 2023-02-16 | 2023-02-16 | Supercritical gas boiler with evaporation screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320232303.0U CN219414720U (en) | 2023-02-16 | 2023-02-16 | Supercritical gas boiler with evaporation screen |
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