CN214468533U - Steam-water flow system for high-temperature ultrahigh-pressure biomass CFB boiler - Google Patents
Steam-water flow system for high-temperature ultrahigh-pressure biomass CFB boiler Download PDFInfo
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- CN214468533U CN214468533U CN202120617367.3U CN202120617367U CN214468533U CN 214468533 U CN214468533 U CN 214468533U CN 202120617367 U CN202120617367 U CN 202120617367U CN 214468533 U CN214468533 U CN 214468533U
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Abstract
A steam-water flow system for a high-temperature ultrahigh-pressure biomass CFB boiler belongs to the field of boiler equipment. The utility model provides a CFB boiler receive the problem that there is the potential safety hazard when the cooling effect is poor, the operation. The utility model discloses a steam pocket, low temperature economizer, high temperature economizer, water circulating system, steam flow system, water feeding port and steam turbine, the entry of steam pocket passes through the tube coupling with the export of high temperature economizer, and high temperature economizer is connected with low temperature economizer, and the entry and the water feeding port of low temperature economizer are connected, and the water route exit linkage of steam pocket has water circulating system, and the steam route exit linkage of steam pocket has steam flow system, and the exit linkage of steam flow system has the steam turbine. The utility model discloses a soda flow system can the active cooling receive the hot side when the CFB boiler operation, makes the CFB boiler safety and stability when the running state, reaches the purpose of boiler safe operation.
Description
Technical Field
The utility model belongs to a soda flow system of living beings CFB boiler belongs to the boiler equipment field.
Background
The biomass circulating fluidized bed boiler is called CFB boiler for short. Circulating fluidized bed CFB combustion technology is receiving increasing attention from various countries due to its unique advantages over other combustion technologies in terms of fuel replacement, disposal of various wastes, and environmental protection. The technology for processing biomass is started in the end of the 80 th 20 th century, has considerable scale and certain operation experience abroad, and is just started to be applied in China.
The biomass energy is renewable energy, has rich sources, is the energy which is second to coal, petroleum and natural gas but is in the fourth place of the total energy consumption of the world, has high volatile content, low moisture and low heat value, has much lower density than the conventional pulverized coal fuel, does not have deflagration characteristic and needs longer residence time during combustion, so that the fluidization speed value is smaller than the fluidization speed value of the conventional CFB boiler during CFB boiler design, and the carbon loss caused by incomplete combustion is prevented from increasing;
in view of the above, a steam-water flow system for a high-temperature ultrahigh-pressure biomass CFB boiler is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a CFB boiler receive the problem that there is the potential safety hazard when the cooling effect is poor, the operation. Further discloses a steam-water flow system for the high-temperature ultrahigh-pressure biomass CFB boiler. A brief summary of the present invention is provided below in order to provide a basic understanding of some aspects of the present invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention.
The technical scheme of the utility model:
a steam-water flow system for a high-temperature ultrahigh-pressure biomass CFB boiler comprises a steam drum, a low-temperature economizer, a high-temperature economizer, a water circulation system, a steam flow system, a water feeding port and a steam turbine, wherein an inlet of the steam drum is connected with an outlet of the high-temperature economizer through a pipeline, the high-temperature economizer is connected with the low-temperature economizer, an inlet of the low-temperature economizer is connected with the water feeding port, a waterway outlet of the steam drum is connected with the water circulation system, a steam passage outlet of the steam drum is connected with the steam flow system, and an outlet of the steam flow system is connected with the steam turbine;
the steam flow system comprises a left separator inlet flue, a right separator inlet flue, a left separator, a right separator, a convection bag wall partition wall, a convection bag wall front and back wall, a left bag wall, a right bag wall, a low-temperature superheater, a medium-temperature superheater and a high-temperature superheater, wherein a steam outlet of a steam bag is respectively connected with the left separator inlet flue and the right separator inlet flue, the left separator inlet flue is connected with the left separator, the right separator inlet flue is connected with the right separator, an outlet of the left separator and an outlet of the right separator are connected with the convection bag wall partition wall, the convection bag wall partition wall is connected with the convection bag wall front and back wall, the convection bag wall front and back wall are respectively connected with the left bag wall and the right bag wall, air outlets of the left bag wall and the right bag wall are commonly connected with the low-temperature superheater, an outlet of the low-temperature superheater is connected with an inlet of the medium-temperature superheater through a pipeline, the outlet of the medium-temperature superheater is connected with the inlet of the high-temperature superheater, and the outlet of the high-temperature superheater is connected with a steam turbine.
Furthermore, the separator types of the left separator and the right separator are the same, and the left separator and the right separator are both steam-cooled cyclone separators.
Further, the low-temperature superheater comprises a low-temperature superheater inlet collection box, a low-temperature superheater outlet collection box and a low-temperature superheater U-shaped tube panel, the low-temperature superheater inlet collection box is respectively connected with the left side wrapping wall and the right side wrapping wall, the low-temperature superheater inlet collection box is connected with the low-temperature superheater outlet collection box through the low-temperature superheater U-shaped tube panel, and the low-temperature superheater outlet collection box is connected with the medium-temperature superheater.
Furthermore, a first-stage water spray desuperheater is arranged on a pipeline between the low-temperature superheater and the medium-temperature superheater.
Furthermore, the high-temperature superheater comprises a high-temperature superheater inlet collection box, a high-temperature superheater outlet collection box and a high-temperature superheater tube panel, the high-temperature superheater inlet collection box is connected with an outlet of the medium-temperature superheater, the high-temperature superheater inlet collection box is connected with the high-temperature superheater outlet collection box through the high-temperature superheater tube panel, and the high-temperature superheater outlet collection box is connected with the steam turbine through a pipeline.
Furthermore, a secondary water spray desuperheater is arranged on a pipeline between the high-temperature superheater inlet collection box and the medium-temperature superheater.
Furthermore, the water circulation system comprises a centralized descending pipe, a water-cooled wall lower header, a water-cooled wall upper header and a steam-water lead-out pipe, the water-cooled wall is connected with the steam drum through the centralized descending pipe, the water-cooled wall lower header and the water-cooled wall upper header are fixedly installed on the water-cooled wall, a steam-water lead-out pipe is connected with an outlet of the water-cooled wall, and the other end of the steam-water lead-out pipe is connected with an inlet of the steam drum.
The utility model has the advantages that:
1. by the steam-water flow system for the high-temperature ultrahigh-pressure biomass CFB boiler, the heating surface can be effectively cooled when the CFB boiler operates, so that the CFB boiler is safe and stable in an operating state, and the aim of safe operation of the boiler is fulfilled;
2. the utility model discloses a soda flow system for high temperature superhigh pressure living beings CFB boiler sets up two-stage water spray desuperheater between low temperature over heater, middle temperature over heater and high temperature over heater, spouts the cooling atomized water to the temperature regulating water vapour that flows to middle temperature over heater and high temperature over heater, keeps and controls the temperature of temperature regulating water vapour, guarantees the safe operation of over heater;
3. an upper water-cooled wall header and a lower water-cooled wall header are respectively arranged in front of and behind the water-cooled wall, so that the number of transmission connecting pipelines of working media is reduced, and the safety performance of the water-cooled wall during operation is improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a steam-water flow system for a high-temperature ultrahigh-pressure biomass CFB boiler;
FIG. 2 is a schematic view of a water recycling system;
FIG. 3 is a schematic view of a steam flow system;
FIG. 4 is a schematic view of the overall construction of a low temperature superheater;
FIG. 5 is a schematic view of the overall construction of a high temperature superheater.
In the figure, 1-steam drum, 2-centralized downcomer, 3-water wall, 4-water wall lower header, 5-water wall upper header, 6-steam-water outlet pipe, 7-low-temperature economizer, 8-high-temperature economizer, 9-left separator inlet flue, 10-right separator inlet flue, 11-left separator, 12-right separator, 13-convection drum wall middle partition wall, 14-convection drum wall front and back wall, 15-left drum wall, 16-right drum wall, 17-low-temperature superheater, 18-primary water spray desuperheater, 19-medium-temperature superheater, 20-secondary water spray desuperheater, 21-high-temperature superheater, 22-water circulation system, 23-steam flow system, 24-water supply port, 25-steam turbine, 26-low-temperature superheater inlet header, 27-a low-temperature superheater outlet collection box, 28-a low-temperature superheater U-shaped tube panel, 29-a high-temperature superheater inlet collection box, 30-a high-temperature superheater outlet collection box and 31-a high-temperature superheater tube panel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described below with reference to specific embodiments shown in the accompanying drawings. It should be understood that the description is intended to be exemplary, and not to limit the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 3, and the steam-water flow system for a high-temperature and ultrahigh-pressure biomass CFB boiler of the embodiment comprises a steam drum 1, a low-temperature economizer 7, a high-temperature economizer 8, a water circulation system 22, a steam flow system 23, a water feed port 24 and a steam turbine 25, wherein an inlet of the steam drum 1 is connected with an outlet of the high-temperature economizer 8 through a pipeline, the high-temperature economizer 8 is connected with the low-temperature economizer 7, an inlet of the low-temperature economizer 7 is connected with the water feed port 24, a waterway outlet of the steam drum 1 is connected with the water circulation system 22, a steam outlet of the steam drum 1 is connected with the steam flow system 23, an outlet of the steam flow system 23 is connected with the steam turbine 25, boiler feed water sequentially enters the low-temperature economizer 7 and the high-temperature economizer 8 through the water feed port 24, the low-temperature economizer 7 and the high-temperature economizer 8 heat the water and then input the steam drum 1, and the steam-water is separated in the steam drum 1, the water is respectively input into a water circulation system 22 and a steam flow system 23, the water flows back into the steam drum 1 after circulating through the water circulation system 22, and the saturated steam flows through the steam flow system 23 and is finally input into a steam turbine 25;
the steam flow system 23 comprises a left separator inlet flue 9, a right separator inlet flue 10, a left separator 11, a right separator 12, a convection bag wall middle partition wall 13, a convection bag wall front and rear wall 14, a left bag wall 15, a right bag wall 16, a low temperature superheater 17, a medium temperature superheater 19 and a high temperature superheater 21, a steam outlet of a steam bag 1 is respectively connected with the left separator inlet flue 9 and the right separator inlet flue 10, the left separator inlet flue 9 is connected with the left separator 11, the right separator inlet flue 10 is connected with the right separator 12, outlets of the left separator 11 and the right separator 12 are connected with the convection bag wall middle partition wall 13, the convection bag wall middle partition wall 13 is connected with the superheater front and rear wall 14, the convection bag wall front and rear wall 14 are respectively connected with the left bag wall 15 and the right bag wall 16, air outlets of the left bag wall 15 and the right bag wall 16 are jointly connected with the low temperature 17, an outlet of the low-temperature superheater 17 is connected with an inlet of the medium-temperature superheater 19 through a pipeline, an outlet of the medium-temperature superheater 19 is connected with an inlet of the high-temperature superheater 21, an outlet of the high-temperature superheater 21 is connected with a steam turbine 25, saturated steam in the steam pocket 1 enters the left separator 11 and the right separator 12 through the left separator inlet flue 9 and the right separator inlet flue 10 respectively, the saturated steam is separated by the left separator 11 and the right separator 12 and then converges into the convection pocket wall middle partition wall 13 and the convection pocket wall front and rear walls 14, the saturated steam enters the low-temperature superheater 19 through the convection pocket wall front and rear walls 14 and then enters the left pocket wall 15 and the right pocket wall 16 respectively, the saturated steam is further heated, the heated steam enters the medium-temperature superheater 19 and the high-temperature superheater 21 in sequence to heat the steam into superheated steam, the superheated steam is finally output to the steam turbine 25 through a pipeline, and the separator inlet flue and the body are made of a model wall, the saturated steam led out from the steam pocket 1 is used as a cooling medium to further cool the flue gas, the flue gas in the medium running pipe is flushed outside the pipe, the cooling capacity of the separator is considered, and the requirement of certain mass flow rate must be met, so that the separator adopts a double-flow-path design in a split mode.
The second embodiment is as follows: the embodiment is described with reference to fig. 1 to fig. 3, and the steam-water flow system for the high-temperature ultrahigh-pressure biomass CFB boiler of the embodiment is characterized in that the left separator 11 and the right separator 12 are of the same type, and the left separator 11 and the right separator 12 are steam-cooled cyclone separators.
The third concrete implementation mode: the present embodiment is described with reference to fig. 1 to 4, and the low-temperature superheater 17 of the present embodiment includes a low-temperature superheater inlet collection tank 26, a low-temperature superheater outlet collection tank 27, and a low-temperature superheater U-shaped tube panel 28, where the low-temperature superheater inlet collection tank 26 is connected to the left side enclosure wall 15 and the right side enclosure wall 16, the low-temperature superheater inlet collection tank 26 is connected to the low-temperature superheater outlet collection tank 27 through the low-temperature superheater U-shaped tube panel 28, and the low-temperature superheater outlet collection tank 27 is connected to the medium-temperature superheater 19.
The fourth concrete implementation mode: the embodiment is described with reference to fig. 1 to 4, and a steam-water flow system for a high-temperature ultrahigh-pressure biomass CFB boiler of the embodiment is characterized in that a first-stage water spray desuperheater 18 is installed on a pipeline between a low-temperature superheater 17 and a medium-temperature superheater 19, and the first-stage water spray desuperheater 18 sprays cooling atomized water into temperature-adjusting steam flowing into the medium-temperature superheater 19, and the temperature of the cooling atomized water is melted with the temperature-adjusting steam to reduce the temperature of the temperature-adjusting steam in order to prevent the temperature of the temperature-adjusting steam from being too high to affect the normal operation of equipment.
The fifth concrete implementation mode: the present embodiment is described with reference to fig. 1 to 5, and the high temperature superheater 21 of the present embodiment includes a high temperature superheater inlet header 29, a high temperature superheater outlet header 30, and a high temperature superheater tube panel 31, the high temperature superheater inlet header 29 is connected to an outlet of the medium temperature superheater 19, the high temperature superheater inlet header 29 is connected to the high temperature superheater outlet header 30 through the high temperature superheater tube panel 31, and the high temperature superheater outlet header 30 is connected to the steam turbine 25 through a pipeline.
The sixth specific implementation mode: the present embodiment is described with reference to fig. 1 to 5, and a steam-water flow system for a high-temperature and ultra-high pressure biomass CFB boiler of the present embodiment is characterized in that a second-stage water spray attemperator 20 is installed on a pipeline between a high-temperature superheater inlet header 29 and a medium-temperature superheater 19, and the second-stage water spray attemperator 20 is installed between the medium-temperature superheater 19 and the high-temperature superheater 29, so as to reduce the temperature of temperature-regulated steam and prevent the temperature-regulated steam from overheating and affecting normal operation of equipment.
The seventh embodiment: the embodiment is described with reference to fig. 1 to 5, and the steam-water flow system for the high-temperature ultrahigh-pressure biomass CFB boiler of the embodiment comprises: the water circulation system 22 comprises a centralized downcomer 2, a water-cooled wall 3, a water-cooled wall lower header 4, a water-cooled wall upper header 5 and a steam-water outlet pipe 6, the water-cooled wall 3 is connected with the steam drum 1 through the centralized downcomer 2, the water-cooled wall 3 is fixedly provided with the water-cooled wall lower header 4 and the water-cooled wall upper header 5, an outlet of the water-cooled wall 3 is connected with the steam-water outlet pipe 6, the other end of the steam-water outlet pipe 6 is connected with an inlet of the steam drum 1, the water-cooled wall upper header 5 and the water-cooled wall lower header 4 are respectively welded at the front end and the rear end of the water-cooled wall 3, a conveying connecting pipeline of a working medium is reduced, the safety performance of the water-cooled wall 3 in operation is improved, water in the steam drum 1 enters the water-cooled wall 3 and a water-cooled screen through the centralized downcomer 2 arranged outside the boiler, absorbs heat in the water-cooled wall 3 and the water-cooled screen, and returns to the steam pocket 1 through the steam-water eduction tube 6 after rising once under the action of density, thereby completing the water circulation process.
This embodiment is only illustrative of the patent and does not limit the scope of protection thereof, and those skilled in the art can make modifications to its part without departing from the spirit of the patent.
Claims (7)
1. The utility model provides a soda flow system for high temperature superhigh pressure living beings CFB boiler which characterized in that: the steam-water boiler comprises a steam drum (1), a low-temperature economizer (7), a high-temperature economizer (8), a water circulation system (22), a steam flow system (23), a water feeding port (24) and a steam turbine (25), wherein an inlet of the steam drum (1) is connected with an outlet of the high-temperature economizer (8) through a pipeline, the high-temperature economizer (8) is connected with the low-temperature economizer (7), an inlet of the low-temperature economizer (7) is connected with the water feeding port (24), a waterway outlet of the steam drum (1) is connected with the water circulation system (22), a steam passage outlet of the steam drum (1) is connected with the steam flow system (23), and an outlet of the steam flow system (23) is connected with the steam turbine (25);
the steam flow system (23) comprises a left separator inlet flue (9), a right separator inlet flue (10), a left separator (11), a right separator (12), a convection wrapped wall middle partition wall (13), a convection wrapped wall front and rear wall (14), a left wrapped wall (15), a right wrapped wall (16), a low-temperature superheater (17), a medium-temperature superheater (19) and a high-temperature superheater (21), wherein a steam outlet of a steam pocket (1) is respectively connected with the left separator inlet flue (9) and the right separator inlet flue (10), the left separator inlet flue (9) is connected with the left separator (11), the right separator inlet flue (10) is connected with the right separator (12), an outlet of the left separator (11) and the right separator (12) is connected with the convection wrapped wall middle partition wall (13), the convection wrapped wall middle partition wall (13) is connected with the convection wrapped wall front and rear partition wall (14), the convection bag wall front and rear walls (14) are respectively connected with the left bag wall (15) and the right bag wall (16), the air outlets of the left bag wall (15) and the right bag wall (16) are jointly connected with the low-temperature superheater (17), the outlet of the low-temperature superheater (17) is connected with the inlet of the medium-temperature superheater (19) through a pipeline, the outlet of the medium-temperature superheater (19) is connected with the inlet of the high-temperature superheater (21), and the outlet of the high-temperature superheater (21) is connected with a steam turbine (25).
2. The steam-water flow system for the high-temperature ultrahigh-pressure biomass CFB boiler according to claim 1, characterized in that: the left separator (11) and the right separator (12) are both steam-cooled cyclone separators.
3. The steam-water flow system for the high-temperature ultrahigh-pressure biomass CFB boiler according to claim 1, characterized in that: the low-temperature superheater (17) comprises a low-temperature superheater inlet collection box (26), a low-temperature superheater outlet collection box (27) and a low-temperature superheater U-shaped tube panel (28), the low-temperature superheater inlet collection box (26) is respectively connected with a left side wrapping wall (15) and a right side wrapping wall (16), the low-temperature superheater inlet collection box (26) is connected with the low-temperature superheater outlet collection box (27) through the low-temperature superheater U-shaped tube panel (28), and the low-temperature superheater outlet collection box (27) is connected with the medium-temperature superheater (19).
4. The steam-water flow system for the high-temperature ultrahigh-pressure biomass CFB boiler according to claim 3, characterized in that: a first-stage water spray desuperheater (18) is arranged on a pipeline between the low-temperature superheater (17) and the medium-temperature superheater (19).
5. The steam-water flow system for the high-temperature ultrahigh-pressure biomass CFB boiler according to claim 1 or 3, characterized in that: the high-temperature superheater (21) comprises a high-temperature superheater inlet collection box (29), a high-temperature superheater outlet collection box (30) and a high-temperature superheater tube panel (31), the high-temperature superheater inlet collection box (29) is connected with an outlet of the medium-temperature superheater (19), the high-temperature superheater inlet collection box (29) is connected with the high-temperature superheater outlet collection box (30) through the high-temperature superheater tube panel (31), and the high-temperature superheater outlet collection box (30) is connected with the steam turbine (25) through a pipeline.
6. The steam-water flow system for the high-temperature ultrahigh-pressure biomass CFB boiler according to claim 5, characterized in that: and a secondary water spray desuperheater (20) is arranged on a pipeline between the high-temperature superheater inlet collection box (29) and the medium-temperature superheater (19).
7. The steam-water flow system for the high-temperature ultrahigh-pressure biomass CFB boiler according to claim 1, characterized in that: the water circulation system (22) comprises a concentrated descending pipe (2), a water-cooled wall (3), a water-cooled wall lower header (4), a water-cooled wall upper header (5) and a steam-water eduction pipe (6), the water-cooled wall (3) is connected with the steam pocket (1) through the concentrated descending pipe (2), the water-cooled wall (3) is fixedly provided with the water-cooled wall lower header (4) and the water-cooled wall upper header (5), an outlet of the water-cooled wall (3) is connected with the steam-water eduction pipe (6), and the other end of the steam-water eduction pipe (6) is connected with an inlet of the steam pocket (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120617367.3U CN214468533U (en) | 2021-03-26 | 2021-03-26 | Steam-water flow system for high-temperature ultrahigh-pressure biomass CFB boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120617367.3U CN214468533U (en) | 2021-03-26 | 2021-03-26 | Steam-water flow system for high-temperature ultrahigh-pressure biomass CFB boiler |
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| CN214468533U true CN214468533U (en) | 2021-10-22 |
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| CN202120617367.3U Active CN214468533U (en) | 2021-03-26 | 2021-03-26 | Steam-water flow system for high-temperature ultrahigh-pressure biomass CFB boiler |
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- 2021-03-26 CN CN202120617367.3U patent/CN214468533U/en active Active
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