CN209819873U - Flow state balance water coal slurry circulating fluidized combustion hot water boiler - Google Patents
Flow state balance water coal slurry circulating fluidized combustion hot water boiler Download PDFInfo
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- CN209819873U CN209819873U CN201821620788.6U CN201821620788U CN209819873U CN 209819873 U CN209819873 U CN 209819873U CN 201821620788 U CN201821620788 U CN 201821620788U CN 209819873 U CN209819873 U CN 209819873U
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Abstract
The utility model discloses a flow state balance water-coal-slurry circulating fluidized combustion hot water boiler, which comprises a hearth, a high-temperature heat-insulation cyclone separator and a flue; the flue is sequentially provided with an economizer and an air preheater from top to bottom; the bottom of the hearth is provided with a fluidized bed combustion chamber; a coal water slurry spreader connecting pipe is arranged in the side wall of the hearth and connected with a slurry supply pump and the coal water slurry spreader; a medium bed material connecting pipe and a desulfurizer inlet connecting pipe are arranged in the middle of the inner part of the front wall of the hearth, and the medium bed material connecting pipe and the desulfurizer inlet connecting pipe are both communicated with the fluidized bed combustion chamber; the high-temperature heat-insulation cyclone separator is connected to an upper outlet of the hearth, an upper central outlet cylinder of the high-temperature heat-insulation cyclone separator is connected to the flue, the lower part of the upper central outlet cylinder of the high-temperature heat-insulation cyclone separator is connected with the self-balancing return valve, and the self-balancing return valve is connected to the fluidized bed combustion chamber through the separation return channel. The boiler adopts a self-balancing technology of a circulating fluidized state, and can realize low pollutant emission.
Description
Technical Field
The utility model relates to the technical field of boilers, in particular to flow state equilibrium coal water slurry circulating fluidized combustion boiler.
Background
The water-coal-slurry hot water boiler is a boiler with wide application prospect. However, in the existing water-coal-slurry hot water boiler, the unburned materials in the hearth are more, and the unburned materials can directly enter a flue along with flue gas, so that more pollutants are discharged.
Therefore, how to provide a low pollutant emission hot water boiler is a technical problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a flow state equilibrium coal water slurry circulation fluidization combustion boiler can realize low pollutant emission to realize material fluidization state self-balancing, have the characteristics of the interior desulfurization nitrogen reduction of stove.
In order to achieve the above object, the utility model provides a following technical scheme:
a fluidized-state balance coal water slurry circulating fluidized combustion hot water boiler comprises a hearth, a high-temperature heat-insulation cyclone separator and a flue; the flue is sequentially provided with an economizer and an air preheater from top to bottom; the bottom of the hearth is provided with a fluidized bed combustion chamber, a coal water slurry spreader connecting pipe is arranged in the side wall of the hearth, and the coal water slurry spreader connecting pipe is connected with a slurry supply pump and a coal water slurry spreader; a media bed material connecting pipe and a desulfurizer inlet connecting pipe are arranged in the middle of the inner part of the front wall of the hearth, and the media bed material connecting pipe and the desulfurizer inlet connecting pipe are both communicated with the fluidized bed combustion chamber; the high-temperature heat-insulation cyclone separator is connected to an upper outlet of the hearth, an upper central outlet cylinder of the high-temperature heat-insulation cyclone separator is connected to the flue, the lower portion of the high-temperature heat-insulation cyclone separator is connected with a self-balancing return valve, and the self-balancing return valve is connected to the fluidized bed combustion chamber through a separation return channel.
Preferably, a primary air chamber is arranged below the fluidized bed combustion chamber, a secondary air pipe is arranged on the side wall of the hearth, an outlet of the secondary air pipe is oval, the secondary air pipe is arranged in a double-layer mode in the height direction, and the secondary air pipe is connected to the secondary fan.
Preferably, the height difference between the bed surface at the bottom of the fluidized bed combustion chamber and the outlet of the secondary air pipe at the upper layer ranges from 3m to 4 m.
Preferably, the heating surface of the economizer is horizontally arranged.
Preferably, the air preheater is a shell and tube air preheater.
The utility model provides a flow state balance water-coal slurry circulating fluidized combustion hot water boiler, which comprises a hearth, a high-temperature heat insulation cyclone separator and a flue; the flue is sequentially provided with an economizer and an air preheater from top to bottom; the bottom of the hearth is provided with a fluidized bed combustion chamber, a coal water slurry spreader connecting pipe is arranged in the side wall of the hearth and is connected with a slurry supply pump and a coal water slurry spreader; a medium bed material connecting pipe and a desulfurizer inlet connecting pipe are arranged in the middle of the inner part of the front wall of the hearth, and the medium bed material connecting pipe and the desulfurizer inlet connecting pipe are both communicated with the fluidized bed combustion chamber; the high-temperature heat-insulation cyclone separator is connected to an upper outlet of the hearth, an upper central outlet cylinder of the high-temperature heat-insulation cyclone separator is connected to the flue, the lower portion of the high-temperature heat-insulation cyclone separator is connected with the self-balancing return valve, and the self-balancing return valve is connected to the fluidized bed combustion chamber through the separation return channel.
In the flow state balance water-coal-slurry circulating fluidized combustion hot water boiler, a circulating fluidized state self-balancing technology is adopted, and meanwhile, an efficient high-temperature heat-insulation cyclone separator and a self-balancing return valve are adopted, so that the separation efficiency is high, the grading cutting particle size is greatly reduced compared with that of a conventional circulating fluidized bed boiler, and the self-balancing of the material fluidized state can be realized by operating in a thin material layer and a low bed pressure. Meanwhile, the high-temperature heat-insulation cyclone separator can capture carbon particles which are not burnt out and return to a hearth for secondary combustion, can solve the problem of high content of residual carbon in fly ash caused by low-temperature combustion, has the characteristics of desulfurization and nitrogen reduction in a furnace, can realize low pollutant emission, and can ensure the high-efficiency combustion of the water-coal-slurry fuel. Meanwhile, the water-coal-slurry spreader, the media bed material connecting pipe and the desulfurizer inlet connecting pipe are used for respectively supplying materials into the hearth, so that the water-coal-slurry fuel and the media material can be ensured to uniformly enter the hearth, and various fuels for combustion can timely enter the hearth.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural view of the flow state balance coal water slurry circulating fluidized combustion hot water boiler provided by the present invention.
In the figure: the device comprises a material discharging pipe 1, a primary air chamber 2, a fluidized bed combustion chamber 3, a media bed material connecting pipe 4, a desulfurizer inlet connecting pipe 5, a secondary air pipe 6, a coal water slurry sprayer connecting pipe 7, a hearth 8, a high-temperature heat-insulating cyclone separator 9, a flue 10, an economizer 11, an air preheater 12 and a self-balancing return valve 13.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide a flow state equilibrium coal water slurry circulation fluidization combustion boiler can realize the low pollutant and discharge to realize material fluidization state self-balancing, have the characteristics that the interior desulfurization of stove falls nitrogen.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a flow state balance coal water slurry circulating fluidized combustion hot water boiler provided by the present invention.
The utility model provides a boiler's a concrete embodiment, including furnace 8, high temperature adiabatic cyclone 9 and flue 10.
Wherein, the flue 10 is provided with a coal economizer 11 and an air preheater 12 from top to bottom in sequence. The bottom of the hearth 8 is provided with a fluidized bed combustion chamber 3. In addition, a coal water slurry spreader connecting pipe 7 is arranged in the side wall of the hearth 8, the coal water slurry spreader connecting pipe 7 is connected with the slurry supply pump and the coal water slurry spreader so as to provide the coal water slurry for the fluidized bed combustion chamber 3, and the coal water slurry can be uniformly spread to the bottom of the fluidized bed combustion chamber 3 through the slurry supply pump and the coal water slurry spreader. Alternatively, the height of the nozzle of the coal-water slurry spreader nozzle 7 from the bed surface at the bottom of the fluidized bed combustion chamber 3 can be in the range of 2m to 4 m. The middle part in the front wall of the hearth 8 can be provided with a media bed material connecting pipe 4 and a desulfurizer inlet connecting pipe 5, and the media bed material connecting pipe 4 and the desulfurizer inlet connecting pipe 5 are both communicated with the fluidized bed combustion chamber 3 so as to correspondingly supply media bed materials and desulfurizer to the fluidized bed combustion chamber 3, wherein the desulfurizer inlet connecting pipe 5 provides desulfurizer, and the media bed material connecting pipe 4 provides media bed materials.
The water-coal-slurry spreader, the media bed material connecting pipe 4 and the desulfurizer inlet connecting pipe 5 respectively supply materials into the hearth 8, so that the water-coal-slurry fuel and the media material can be ensured to uniformly enter the hearth, and various fuels for combustion can enter the hearth 8 in time.
The high-temperature heat-insulation cyclone separator 9 is connected to an upper outlet of the hearth 8, an upper central outlet cylinder of the high-temperature heat-insulation cyclone separator 9 is connected to the flue 10, the lower part of the high-temperature heat-insulation cyclone separator 9 is connected with the self-balancing return valve 13, and the self-balancing return valve 13 is connected to the fluidized bed combustion chamber 3 through a separation return channel.
In the embodiment, a self-balancing technology of a circulating fluidized state is adopted, and meanwhile, the high-efficiency high-temperature heat-insulation cyclone separator 9 and the self-balancing return valve 13 are adopted, so that the separation efficiency is high, the grading cutting particle size is greatly reduced compared with that of a conventional circulating fluidized bed boiler, and the self-balancing of the fluidized state of the materials can be realized by operating in a thin material layer and at low bed pressure. Meanwhile, the high-temperature heat-insulation cyclone separator 9 can capture carbon particles which are not burnt out and return to the hearth 8 for secondary combustion, can solve the problem of high content of residual carbon in fly ash caused by low-temperature combustion, has the characteristics of desulfurization and nitrogen reduction in the furnace, can realize low pollutant emission and can ensure the high-efficiency combustion of the water-coal-slurry fuel.
In addition to the above embodiments, the primary air chamber 2 is provided below the fluidized-bed combustor 3. The middle part of the fluidized bed combustion chamber 3 can be provided with a discharge pipe 1, and one end of the discharge pipe 1 extends out of the primary air chamber 2. Be equipped with secondary air pipe 6 on furnace 8's the side wall, secondary air pipe 6's export is oval and secondary air pipe 6 is double-deck setting in the direction of height, and secondary air pipe 6's export is linked together with fluidized bed combustion chamber 3 and furnace 8, and secondary air pipe 6 connects in secondary fan. Wherein, the quantity of secondary tuber pipe 6 can set up according to actual need, for example, can be equipped with secondary tuber pipe 6 on two opposite side walls of furnace 8 respectively, and on every side wall, secondary tuber pipe 6 all sets up two-layerly on the direction of height, and simultaneously, secondary tuber pipe 6's export specifically can set up the middle and lower part at furnace 8 side wall.
In a flow state balance coal water slurry circulating fluidized combustion hot water boiler, hot water is produced by matching a medium material circulating combustion system, a gas supply and distribution system and a heat exchange system. Wherein, the medium material circulating combustion system comprises a hearth 8; the air supply and distribution system comprises a primary air system and a secondary air system, the primary air system comprises a primary air chamber 2, and the secondary air system comprises a secondary air pipe 6 and a secondary fan; the heat exchange system comprises a membrane wall and a flue 10 in the hearth 8, and the membrane wall can be a water-cooling membrane wall.
In this embodiment, the primary air chamber 2 is disposed below the fluidized bed combustion chamber 3, and primary air enters the fluidized bed combustion chamber 3 from bottom to top, so that the materials are fluidized and the coal water slurry is subjected to anoxic combustion. Secondary air pipe 6 lets in the overgrate air to furnace 8 to make the formation oxygen boosting burning atmosphere above furnace 8, the sufficiency that the coal slurry burning can be improved in the cooperation of air and overgrate air, the overgrate air penetrating power is strong, send the effect of joining in marriage wind better, simultaneously, because the export of secondary air pipe 6 is oval, the air inlet resistance is less, is favorable to the high-efficient burning of coal slurry, and is favorable to practicing thrift the required energy of consuming of secondary fan and whole boiler.
Alternatively, the economizer 11 and the air preheater 12 may both be arranged horizontally.
In addition to any of the above embodiments, the height difference between the bottom surface of the fluidized bed combustion chamber 3 and the outlet of the upper secondary air duct 6 may be in the range of 3m to 4m, for example, 3m, 3.5m, and 4m or other height values in this range.
On the basis of any of the above embodiments, the heating surface of the economizer 11 may be arranged horizontally, which is beneficial to reducing the smoke resistance.
Based on any of the above embodiments, the air preheater 12 can be a tubular air preheater, and the air preheater 12 has good sealing performance, high heat transfer efficiency, and easy manufacture and processing.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
It is right above that the utility model provides a flow state equilibrium coal water slurry circulation fluidization combustion boiler has carried out the detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (5)
1. A fluidized-state balance coal water slurry circulating fluidized combustion hot water boiler is characterized by comprising a hearth (8), a high-temperature heat-insulation cyclone separator (9) and a flue (10); the flue (10) is sequentially provided with a coal economizer (11) and an air preheater (12) from top to bottom; the bottom of the hearth (8) is provided with a fluidized bed combustion chamber (3); a coal water slurry spreader connecting pipe (7) is arranged in the side wall of the hearth (8), the coal water slurry spreader connecting pipe (7) is connected with a slurry supply pump and a coal water slurry spreader, and the coal water slurry can be uniformly spread to the bottom of the fluidized bed combustion chamber (3) through the slurry supply pump and the coal water slurry spreader; a media bed material connecting pipe (4) and a desulfurizer inlet connecting pipe (5) are arranged in the middle of the inner part of the front wall of the hearth (8), the media bed material connecting pipe (4) and the desulfurizer inlet connecting pipe (5) are communicated with the fluidized bed combustion chamber (3) so as to correspondingly supply media bed materials and desulfurizer to the fluidized bed combustion chamber (3), wherein the desulfurizer inlet connecting pipe (5) provides desulfurizer, and the media bed material connecting pipe (4) provides media bed materials; the high-temperature heat-insulation cyclone separator (9) is connected to an upper outlet of the hearth (8), an upper central outlet cylinder of the high-temperature heat-insulation cyclone separator (9) is connected to the flue (10), the lower part of the high-temperature heat-insulation cyclone separator (9) is connected with a self-balancing return valve (13), and the self-balancing return valve (13) is connected to the fluidized bed combustion chamber (3) through a separation return channel;
the height range of the distance between the pipe orifice of the water-coal-slurry sprinkler connecting pipe (7) and the bed surface at the bottom of the fluidized bed combustion chamber (3) can be 2m to 4 m;
a primary air chamber (2) is arranged below the fluidized bed combustion chamber (3), secondary air pipes (6) are arranged on the side walls of the hearth (8), the outlet of each secondary air pipe (6) is oval, the secondary air pipes (6) are respectively arranged on the two opposite side walls of the hearth (8), and the secondary air pipes (6) are connected to a secondary fan;
the coal water slurry sprinkler connecting pipe (7) is arranged above the secondary air pipe (6).
2. The fluidized equilibrium water-coal-slurry circulating fluidized combustion hot water boiler according to claim 1, wherein the secondary air pipe (6) is provided in two layers in the height direction.
3. The fluidized equilibrium water-coal-slurry circulating fluidized combustion hot water boiler according to claim 2, wherein the height difference between the bed surface at the bottom of the fluidized bed combustion chamber (3) and the outlet of the secondary air pipe (6) at the upper layer is 3m to 4 m.
4. The fluidized equilibrium water-coal-slurry circulating fluidized combustion hot water boiler according to claim 1, wherein the heated surface of the economizer (11) is arranged horizontally.
5. The fluidized equilibrium water-coal-slurry circulating fluidized combustion hot water boiler according to claim 1, wherein the air preheater (12) is a shell and tube air preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821620788.6U CN209819873U (en) | 2018-09-29 | 2018-09-29 | Flow state balance water coal slurry circulating fluidized combustion hot water boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821620788.6U CN209819873U (en) | 2018-09-29 | 2018-09-29 | Flow state balance water coal slurry circulating fluidized combustion hot water boiler |
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| Publication Number | Publication Date |
|---|---|
| CN209819873U true CN209819873U (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821620788.6U Active CN209819873U (en) | 2018-09-29 | 2018-09-29 | Flow state balance water coal slurry circulating fluidized combustion hot water boiler |
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| CN (1) | CN209819873U (en) |
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2018
- 2018-09-29 CN CN201821620788.6U patent/CN209819873U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210218 Address after: 266000 room 402, Block E, No. 67 and 69, Yinchuan West Road, Shinan District, Qingdao City, Shandong Province Patentee after: Qingdao Trier Technology Co.,Ltd. Address before: 266073 E402, 403, 67, 69 Yinchuan West Road, Shinan District, Qingdao City, Shandong Province Patentee before: QINGDAO CLEAR ENVIRONMENTAL PROTECTION GROUP Co.,Ltd. |
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| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20220331 Granted publication date: 20191220 |