CN109764328B - Application method of supercritical carbon dioxide boiler - Google Patents
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- CN109764328B CN109764328B CN201811517334.0A CN201811517334A CN109764328B CN 109764328 B CN109764328 B CN 109764328B CN 201811517334 A CN201811517334 A CN 201811517334A CN 109764328 B CN109764328 B CN 109764328B
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Abstract
The invention discloses a using method of a supercritical carbon dioxide boiler, which comprises a hearth and a flue, wherein eight cooling walls are arranged in the hearth, each cooling wall comprises an upper header, a middle header, a bottom header, a plurality of first cooling pipes and a plurality of second cooling pipes, two ends of each first cooling pipe are respectively communicated with the upper header and the middle header, two ends of each second cooling pipe are respectively communicated with the middle header and the bottom header, the middle header is provided with a working medium inlet of the cooling wall, the upper header and the bottom header are provided with working medium outlets of the cooling wall, or the upper header and the bottom header are provided with working medium inlets of the cooling wall, and the middle header is provided with a working medium outlet of the cooling wall. According to the invention, the working medium in the boiler is freely distributed according to the pressure drop in the first cooling pipe and the second cooling pipe, so that the overlarge pressure caused by large flow in the cooling wall is reduced, and the safety of boiler operation is improved.
Description
Technical Field
The invention relates to the technical field of supercritical carbon dioxide coal-fired boilers, in particular to a supercritical carbon dioxide boiler cooling wall, a supercritical carbon dioxide boiler cooling wall and a supercritical carbon dioxide boiler using method.
Background
Supercritical carbon dioxide brayton coal-fired power generation has become the current research hotspot. Compared with the conventional steam Rankine cycle, the power generation system using the supercritical carbon dioxide as the working medium has the characteristics of smaller system size, more compact structure, capability of saving floor area and reduction in manufacturing cost. Due to the special physical properties of supercritical carbon dioxide, the energy flow density of the supercritical carbon dioxide is larger than that of water, and the flow of fluid flowing through the cooling wall area is 8 times larger than that of a water steam boiler, so that the arrangement of the cooling wall of the boiler becomes the technical difficulty of a boiler system.
The Chinese invention patent CN101586802B discloses a once-through boiler water-cooled wall, working medium flowing out of an economizer flows into a cooling wall of a boiler from a cold ash bucket area at the bottom of the boiler, so that the heat flow density of a boiler hearth area is very high, local overtemperature tube explosion is easily caused, the service life of the cooling wall of the boiler is shortened, and the thermal performance requirement of the cooling wall material of the boiler is very strict.
Chinese patent CN106090865B discloses a method for arranging radiation heating surfaces of a supercritical carbon dioxide boiler, wherein a reheating working medium radiation heating surface is arranged in an ash cooling bucket area, so that the wall temperature difference of the wall temperature of the heating surface along the height direction of a hearth is reduced to a certain extent, but forced convection circulation is adopted in the working medium circulation in the boiler, the working medium on the heating surface has large in-range resistance, and the flow of the working medium in a tube bundle can not be effectively adjusted along with the load of the boiler.
Therefore, it is necessary to provide a cooling wall which can effectively solve the technical problem of uneven wall surface temperature and can flexibly regulate and control the flow rate of the working medium in the cooling wall.
Disclosure of Invention
In order to achieve the technical effects, the invention provides a supercritical carbon dioxide boiler cooling wall, a boiler and a use method thereof, which are suitable for a supercritical carbon dioxide Brayton cycle thermal power generation system, can effectively control the wall surface temperature of the cooling wall, and flexibly solve the technical problem of uneven temperature distribution of the cooling wall, and adopt the technical scheme that:
the utility model provides a supercritical carbon dioxide boiler stave, its characterized in that, includes upper portion header, middle part header, bottom header, many first cooling tubes and many second cooling tubes, upper portion header, middle part header and bottom header set up at interval from top to bottom in proper order along vertical direction, many first cooling tube arranges and distributes upper portion header with between the middle part header, its both ends respectively with upper portion header and middle part header intercommunication, many the vertical range of second cooling tube distributes between middle part header and the bottom header, its both ends respectively with middle part header and bottom header intercommunication.
Further, the included angle between each first cooling pipe and each second cooling pipe and the vertical line is respectively alpha, wherein the range of alpha is as follows: alpha is more than or equal to 0 and less than 30 degrees.
According to the supercritical carbon dioxide boiler cooling wall, the working medium is freely distributed according to the pressure drop, the wall temperature difference value of the cooling wall along the height direction of the hearth is reduced, the pressure caused by large flow in the cooling wall is reduced, and the operation safety of the boiler is improved.
The utility model provides a supercritical carbon dioxide boiler, includes furnace and flue, the stave is equipped with eight, eight the stave divide into four groups stave groups, and two staves in every group stave group are main working medium stave and reheat working medium stave respectively, four main working medium stave sets up respectively furnace around to all be located the combustor and the cold ash bucket department of boiler, four reheat working medium stave sets up respectively furnace around, and all be located the combustor top extremely between the furnace export.
Furthermore, at least one and at most three of the four reheating working medium cooling walls are primary reheating working medium cooling walls, and the rest are secondary reheating working medium cooling walls.
According to the supercritical carbon dioxide boiler, the cooling working medium is introduced from the combustion area with larger specific heat, so that the higher wall surface temperature of the cooling wall in the area with larger specific heat is effectively reduced, the problem that the wall surface of the cooling wall is heated unevenly along the height direction of the hearth is solved, the running safety of the boiler is improved, the requirement on the thermal property of the material of the cooling wall is lowered, and the investment cost of the boiler is lowered.
A working medium flows in from an inlet of the middle header, flows into the upper header and the bottom header through the first cooling pipe and the second cooling pipe respectively, and then flows out from outlets of the upper header and the bottom header respectively.
Working media respectively flow in from inlets of the upper header and the bottom header, are respectively collected to the middle header through the first cooling pipe and the second cooling pipe, and flow out from an outlet of the middle header.
The method for using the cooling wall of the boiler comprises the steps of flowing into the middle header and then shunting to the upper header and the bottom header, or flowing into the middle header and then converging to the upper header and the bottom header.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a cooling wall of a supercritical carbon dioxide boiler according to the present invention;
FIG. 2 is a second schematic structural diagram of a cooling wall of a supercritical carbon dioxide boiler according to the present invention;
FIG. 3 is a schematic structural view of the supercritical carbon dioxide boiler according to embodiment 1 of the present invention;
FIG. 4 is a schematic structural view of the supercritical carbon dioxide boiler according to embodiment 2 of the present invention;
FIG. 5 is a schematic structural view of the supercritical carbon dioxide boiler according to embodiment 3 of the present invention;
fig. 6 is a schematic structural diagram of the supercritical carbon dioxide boiler according to embodiment 4 of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The principles and features of the present invention are described below in conjunction with the accompanying fig. 1-6, which are provided by way of example only and are not intended to limit the scope of the invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to fig. 1, the supercritical carbon dioxide boiler cooling wall of the present invention includes an upper header 101, a middle header 102, a bottom header 103, a plurality of first cooling pipes 104 and a plurality of second cooling pipes 105, where the upper header 101, the middle header 102 and the bottom header 103 are sequentially arranged at intervals from top to bottom along a vertical direction, the plurality of first cooling pipes 104 are arranged and distributed between the upper header 101 and the middle header 102, two ends of each first cooling pipe are respectively communicated with the upper header 101 and the middle header 102, the plurality of second cooling pipes 105 are vertically arranged and distributed between the middle header 102 and the bottom header 103, and two ends of each second cooling pipe 105 are respectively communicated with the middle header 102 and the bottom header 103.
The working principle of the cooling wall of the supercritical carbon dioxide boiler in the embodiment is as follows:
supercritical carbon dioxide working medium flows in from the inlet of the middle header 102 and freely distributes and flows according to pressure drop, and the working medium respectively flows into the upper header 101 and the bottom header 103 and flows out from the outlets of the upper header 101 and the bottom header 103;
or supercritical carbon dioxide working medium flows in from the inlets of the upper header 101 and the bottom header 103 and freely distributes and flows according to pressure drop, and the working medium is collected in the middle header 102 and flows out from the outlet of the middle header 102.
The supercritical carbon dioxide working medium in the cooling wall is influenced by the heat flux density of different positions of the boiler, the pressure drop of the supercritical carbon dioxide working medium is reduced due to the fact that the buoyancy lift force of a high heat flux density area of the boiler is increased, therefore, in the high heat flux density area of the boiler, the mass flow of the supercritical carbon dioxide working medium in the cooling wall is increased, the influence of different boiler heat flux densities on the temperature difference of supercritical carbon dioxide working medium inlets in the plurality of first cooling pipes 104 and the plurality of second cooling pipes 105 is reduced, the temperature of the cooling wall is adjusted, meanwhile, the supercritical carbon dioxide working medium in the cooling wall is freely distributed in the first cooling pipes and the second cooling pipes according to the pressure drop, the pressure caused by large flow in the cooling wall is reduced, and the operation safety of the boiler is improved.
The first cooling pipe 104 and the second cooling pipe 105 are both fin pipes, a plurality of first cooling pipes 104 and a plurality of second cooling pipes 105 are respectively arranged and distributed, and the adjacent first cooling pipes 104 or the adjacent second cooling pipes 105 are welded; the first cooling pipe 104 and the second cooling pipe 105 may also be light pipes, a plurality of the first cooling pipes 104 and a plurality of the second cooling pipes 105 are respectively arranged and distributed, and adjacent first cooling pipes 104 or adjacent second cooling pipes 105 are connected by flat steel welded with the adjacent first cooling pipes 104 or the adjacent second cooling pipes 105.
The two adjacent first cooling pipes 104 and the two adjacent second cooling pipes 105 are connected in a sealing manner, so that the air tightness is good, the heat loss caused by smoke exhaust is reduced, the heat efficiency of the boiler is improved, the cooling wall tightly surrounds the hearth, the furnace wall of the boiler does not need to be coated with refractory materials, the structure of the furnace wall is simplified, and the total weight of the boiler is reduced.
Preferably, each of the first cooling pipes 104 and each of the second cooling pipes 105 respectively form an angle α with a vertical line, wherein α is greater than or equal to 0 ° and less than 30 °.
As shown in fig. 1, the included angles α between the first cooling pipe 104 and the second cooling pipe 105 and the vertical plane are both 0 °, that is, the first cooling pipe 104 and the second cooling pipe 105 are both vertically arranged, so that the structure is simple and the installation is convenient.
As shown in fig. 2, when the first cooling pipe 104 or the second cooling pipe 105 is obliquely arranged, and the included angle α between the first cooling pipe 104 or the second cooling pipe 105 and the vertical surface is 0< α <30, the oblique first cooling pipe 104 or the second cooling pipe 105 is wound around the furnace chamber, so that the furnace chamber can bear a larger mass flow rate, the flow deviation is small, the working medium synchronously passes through the region with the strongest heating and the region with the hottest heating, the thermal deviation is small, and therefore, the working medium circulation power stability is high, and the furnace chamber is suitable for variable-pressure operation of the cooling wall.
And the included angles between the first cooling pipe 104 and the second cooling pipe 105 and the vertical surface are in the range of 0-30 degrees, so that the working medium stagnation caused by overlarge included angles between the first cooling pipe 104 and the vertical surface and the second cooling pipe 105 is avoided, and the phenomenon of overtemperature tube explosion caused by heat accumulation in the pipes is avoided.
As shown in fig. 3, the supercritical carbon dioxide boiler comprises a hearth and a flue, the hearth is square, burners 3 are arranged in the hearth, the number of the cooling walls is eight, the eight cooling walls are divided into four cooling wall groups, two cooling walls in each cooling wall group are respectively a main working medium cooling wall 1 and a reheating working medium cooling wall 2, the four main working medium cooling walls 1 are respectively arranged around the hearth, the burners 3 are positioned between the four main working medium cooling walls 1, the lower ends of the four main working medium cooling walls 1 extend to the lower end of the hearth, and the lower ends of the four main working medium cooling walls 1 form an ash cooling hopper; the four reheating working medium cooling walls 2 are respectively arranged on the periphery of the hearth and are positioned between the upper part of the burner 3 and the outlet of the hearth, so that the working medium in each main working medium cooling wall 1 is uniformly distributed, and the phenomenon of tube explosion caused by uneven working medium distribution is avoided.
At least one and at most three of the four reheating working medium cooling walls 2 are primary reheating working medium cooling walls, and the rest are secondary reheating working medium cooling walls.
Will main working medium stave 1 sets up in the combustor 3 region and the cold ash bucket region of boiler to introduce working medium from the great combustion area of specific heat, the effectual stave wall temperature that has reduced big specific heat region has solved the stave and has avoided being heated uneven along furnace direction of height, is favorable to prolonging the life of boiler stave, has reduced the too high requirement to boiler stave material, has reduced the cost of boiler.
Be equipped with the stave in the furnace, the stave includes main working medium stave 1 and reheat working medium stave 2, main working medium stave 1 sets up combustor 3 and the regional department of cold ash bucket of furnace, reheat working medium stave 2 is located 3 tops of combustor extremely between the furnace export.
The primary reheating working medium cooling wall and the secondary reheating working medium cooling wall can be respectively provided with two, the two primary reheating working medium cooling walls are arranged at the front wall and the left wall of the boiler, the two secondary reheating working medium cooling walls are arranged at the rear wall and the right wall of the boiler, or the two primary reheating working medium cooling walls are arranged at the front wall and the rear wall of the boiler, and the two secondary reheating working medium cooling walls are arranged at the left wall and the right wall of the boiler.
The number of the primary reheating working medium cooling walls can be three, the number of the secondary reheating working medium cooling walls is one, the three primary reheating working medium cooling walls are respectively arranged on the front wall, the rear wall and the left wall of the boiler, and the one reheating working medium cooling wall 2 is arranged on the right wall of the boiler.
As shown in fig. 3, the upper end of the furnace is communicated with the inlet of the flue, a platen superheater 4, a high-temperature superheater 5, a primary high-temperature reheater 6, a secondary high-temperature reheater 7, a primary low-temperature reheater 8, a primary low-temperature superheater 9, a low-temperature superheater 10, an economizer 11 and an air preheater 12 are sequentially arranged in the flue along the direction away from the furnace, wherein the supercritical carbon dioxide boiler adopts a four-corner tangential firing manner.
The first cooling pipe and the second cooling pipe of the main working medium cooling wall 1 are vertically arranged, and the first cooling pipe and the second cooling pipe of the reheating working medium cooling wall 2 are vertically arranged.
The inlet of the middle header of the main working medium cooling wall 1 is communicated with the outlet of the economizer 11, and the outlets of the upper header and the bottom header are respectively communicated with the inlet of the platen superheater 4.
The working medium flowing out of the outlet of the economizer 11 flows into the middle header of the main working medium cooling wall 1, flows into the upper header and the bottom header of the main working medium cooling wall 1 from the first cooling pipe and the second cooling pipe of the main working medium cooling wall 1 respectively, and flows into the inlet of the platen superheater 4 from the outlets of the upper header and the bottom header of the main working medium cooling wall 1 respectively.
And the inlet of the middle header of the primary reheating working medium cooling wall is communicated with the outlet of a high-pressure cylinder of the steam turbine, and the outlets of the upper header and the bottom header of the primary reheating working medium cooling wall are respectively communicated with the inlet of a primary high-temperature reheater 6.
Working medium flowing out of an outlet of a high-pressure cylinder of the steam turbine flows into a middle header of the primary reheating working medium cooling wall, flows into an upper header and a bottom header of the primary reheating working medium cooling wall from the first cooling pipe and the second cooling pipe, and then flows into the primary high-temperature reheater 6 through outlets of the upper header and the bottom header of the primary reheating working medium cooling wall respectively.
And the inlet of the middle header of the secondary reheating working medium cooling wall is communicated with the outlet of a middle pressure cylinder of the steam turbine, and the outlets of the upper header and the bottom header of the secondary reheating working medium cooling wall are respectively communicated with the inlet of a secondary high-temperature reheater 7.
The working medium flowing out of the outlet of the intermediate cylinder of the steam turbine flows into the middle header of the secondary reheating working medium cooling wall, flows into the upper header and the bottom header of the secondary reheating working medium cooling wall from the first cooling pipe and the second cooling pipe respectively, and flows into the secondary high-temperature reheater 7 from the outlets of the upper header and the bottom header of the secondary reheating working medium cooling wall.
Example 2
As shown in fig. 4, unlike embodiment 1, the first cooling pipe and the second cooling pipe of the main working medium cooling wall 1 are both obliquely arranged, and the first cooling pipe and the second cooling pipe of the reheat working medium cooling wall are both vertically arranged.
And inlets of an upper header and a bottom header of the secondary reheating working medium cooling wall are respectively communicated with an outlet of the steam turbine intermediate pressure cylinder, and an outlet of a middle header of the secondary reheating working medium cooling wall is communicated with an inlet of a secondary high-temperature reheater 7.
The working medium flowing out of the outlet of the intermediate cylinder of the steam turbine flows into the upper header and the bottom header of the secondary reheating working medium cooling wall, flows into the middle header of the secondary reheating working medium cooling wall from the first cooling pipe and the second cooling pipe, is collected in the middle header of the secondary reheating working medium cooling wall, and then flows into the secondary high-temperature reheater 7 through the outlet of the middle header of the primary reheating working medium cooling wall.
Example 3
As shown in fig. 5, unlike embodiment 1, the inlets of the upper header and the bottom header of the main working fluid cooling wall 1 are respectively communicated with the outlet of the economizer 11, and the outlet of the middle header is communicated with the inlet of the platen superheater 4.
The working medium flowing out of the outlet of the economizer 11 flows into the upper header and the bottom header of the main working medium cooling wall 1, flows into the middle header of the main working medium cooling wall 1 from the first cooling pipe and the second cooling pipe, is collected in the middle header of the main working medium cooling wall 1, and then flows into the platen superheater 4 through the outlet of the middle header of the main working medium cooling wall 1.
Example 4
As shown in fig. 6, unlike embodiment 1, the inlets of the upper header and the bottom header of the main working fluid cooling wall 1 are respectively communicated with the outlet of the economizer 11, and the outlet of the middle header is communicated with the inlet of the platen superheater 4.
The working medium flowing out of the outlet of the economizer 11 flows into the upper header and the bottom header of the main working medium cooling wall 1, flows into and is collected in the middle header of the main working medium cooling wall 1 under the action of the pressure of the first cooling pipe and the second cooling pipe, and then flows into the platen superheater 4 through the outlet of the middle header of the main working medium cooling wall 1.
And inlets of an upper header and a bottom header of the primary reheating working medium cooling wall are respectively communicated with an outlet of a high-pressure cylinder of the steam turbine, and an outlet of a middle header of the primary reheating working medium cooling wall is communicated with an inlet of a primary high-temperature reheater 6.
Working medium flowing out of an outlet of a high-pressure cylinder of the steam turbine flows into an upper header and a bottom header of the primary reheating working medium cooling wall, flows into and is collected in a middle header of the primary reheating working medium cooling wall from the first cooling pipe and the second cooling pipe, and then flows into the primary high-temperature reheater 6 through an outlet of the middle header of the primary reheating working medium cooling wall.
And inlets of an upper header and a bottom header of the secondary reheating working medium cooling wall are respectively communicated with an outlet of the steam turbine intermediate pressure cylinder, and an outlet of a middle header of the secondary reheating working medium cooling wall is communicated with an inlet of a secondary high-temperature reheater 7.
The working medium flowing out of the outlet of the intermediate cylinder of the steam turbine flows into the upper header and the bottom header of the secondary reheating working medium cooling wall, flows into the middle header of the secondary reheating working medium cooling wall from the first cooling pipe and the second cooling pipe, is collected in the middle header of the secondary reheating working medium cooling wall, and then flows into the secondary high-temperature reheater 7 through the outlet of the middle header of the secondary reheating working medium cooling wall.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; the present invention may be readily implemented by those of ordinary skill in the art as illustrated in the accompanying drawings and described above; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (3)
1. A using method of a supercritical carbon dioxide boiler is characterized by comprising a hearth and a flue, wherein a combustor (3) is arranged in the hearth, eight cooling walls are arranged in the hearth, each cooling wall comprises an upper header (101), a middle header (102), a bottom header (103), a plurality of first cooling pipes (104) and a plurality of second cooling pipes (105), the upper headers (101), the middle headers (102) and the bottom headers (103) are sequentially arranged from top to bottom at intervals along a vertical direction, the plurality of first cooling pipes (104) are arranged and distributed between the upper headers (101) and the middle headers (102), two ends of each first cooling pipe (104) are respectively communicated with the upper headers (101) and the middle headers (102), and the plurality of second cooling pipes (105) are vertically arranged and distributed between the middle headers (102) and the bottom headers (103), the two ends of the furnace are respectively communicated with the middle header (102) and the bottom header (103), the middle header (102) is provided with a working medium inlet of a cooling wall, the upper header (101) and the bottom header (103) are provided with working medium outlets of the cooling wall, or the upper header (101) and the bottom header (103) are provided with working medium inlets of the cooling wall, the middle header (102) is provided with working medium outlets of the cooling wall, the eight cooling walls are equally divided into four groups of cooling wall groups, two cooling walls in each group of cooling wall group are respectively a main working medium cooling wall (1) and a reheating working medium cooling wall (2), the four main working medium cooling walls (1) are respectively arranged on the periphery in the furnace chamber, the burner (3) is positioned between the four main working medium cooling walls (1), and the four reheating working medium cooling walls (2) are respectively arranged on the periphery in the furnace chamber, working media flow in from an inlet of the middle header (102), flow in from the first cooling pipe (104) and the second cooling pipe (105) to the upper header (101) and the bottom header (103), and flow out from outlets of the upper header (101) and the bottom header (103), or flow in from inlets of the upper header (101) and the bottom header (103), flow in from inlets of the first cooling pipe (104) and the second cooling pipe (105), collect in the middle header (102), and flow out from an outlet of the middle header (102).
2. The method for using a supercritical carbon dioxide boiler according to claim 1, characterized in that each of the first cooling tubes (104) and each of the second cooling tubes (105) respectively has an angle α with the vertical line, where α is in the range of: alpha is more than or equal to 0 and less than 30 degrees.
3. The use method of the supercritical carbon dioxide boiler according to claim 1 is characterized in that at least one and at most three of the four reheating working medium cooling walls (2) are primary reheating working medium cooling walls, and the rest are secondary reheating working medium cooling walls.
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| CN112116493B (en) * | 2020-10-29 | 2021-09-14 | 南方电网电力科技股份有限公司 | Flow adjusting method and system for superheater of coal-fired power plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| NL129291C (en) * | 1961-07-27 | |||
| CH398183A (en) * | 1962-09-03 | 1965-08-31 | Escher Wyss Ag | Gas heater with parallel combustion chamber tubes that are arranged in a ring |
| US3545409A (en) * | 1969-05-07 | 1970-12-08 | Babcock & Wilcox Co | Offset mix tubes |
| JP3020262B2 (en) * | 1990-09-06 | 2000-03-15 | バブコツク日立株式会社 | Pulverized coal-fired boiler |
| JP3085873B2 (en) * | 1995-03-02 | 2000-09-11 | 三菱重工業株式会社 | Supercritical pressure once-through boiler |
| JPH08327007A (en) * | 1995-06-01 | 1996-12-10 | Mitsubishi Heavy Ind Ltd | Supercritical variable pressure once-through boiler |
| JP3810560B2 (en) * | 1998-06-09 | 2006-08-16 | 三菱重工業株式会社 | Fluid mixing and dispensing device |
| CN1831426A (en) * | 2005-03-10 | 2006-09-13 | 三井巴布科克能源公司 | Supercritical downshot boiler |
| CN101586802B (en) * | 2009-06-23 | 2011-05-11 | 东方锅炉（集团）股份有限公司 | Water wall of monotube boiler |
| CN102730345B (en) * | 2011-04-15 | 2014-11-26 | 宁波乐惠食品设备制造有限公司 | Clamping sleeve and clamping sleeve tank |
| CN204404152U (en) * | 2014-12-28 | 2015-06-17 | 哈尔滨锅炉厂有限责任公司 | Low-quality flow ultra-supercritical boiler water EGR |
| CN105485654A (en) * | 2016-01-18 | 2016-04-13 | 西安交通大学 | Boiler water circulation device with middle mixing headers and pressure balance pipes |
| CN106949451A (en) * | 2017-04-26 | 2017-07-14 | 华中科技大学 | A kind of double reheat ultra-supercritical boiler and its heated surface arrangement method |
| CN106979512B (en) * | 2017-04-26 | 2023-05-23 | 华中科技大学 | Supercritical carbon dioxide secondary reheating coal-fired power generation boiler system |
| CN107676769A (en) * | 2017-09-28 | 2018-02-09 | 哈尔滨锅炉厂有限责任公司 | A kind of arrangement of U-shaped boiler and its unit suitable for ultra supercritical Large Copacity coal unit |
| CN107883365A (en) * | 2017-10-11 | 2018-04-06 | 华中科技大学 | A kind of supercritical carbon dioxide reheating coal fired power generation face-fired boiler system |
| CN108534118B (en) * | 2018-03-30 | 2023-10-31 | 东方电气集团东方锅炉股份有限公司 | Water-cooled wall structure of supercritical or ultra-supercritical once-through boiler |
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