CN112856475A - Auxiliary temperature rising device for air supply of boiler of thermal power plant and application method thereof - Google Patents
Auxiliary temperature rising device for air supply of boiler of thermal power plant and application method thereof Download PDFInfo
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- CN112856475A CN112856475A CN202011590404.2A CN202011590404A CN112856475A CN 112856475 A CN112856475 A CN 112856475A CN 202011590404 A CN202011590404 A CN 202011590404A CN 112856475 A CN112856475 A CN 112856475A
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- air
- pipeline
- switch valve
- boiler
- heating
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Supply (AREA)
Abstract
The invention relates to an auxiliary heating device for air supply of a boiler in a thermal power plant, which comprises an air conveying pipeline connected with the boiler, wherein an air feeder and an air preheater are sequentially connected to the air conveying pipeline, and a first switch valve and a second switch valve are respectively connected to the air conveying pipelines on two sides of the air preheater; an air inlet pipeline is connected to the air conveying pipeline between the first switch valve and the air blower, and an air outlet pipeline is connected to the air conveying pipeline between the second switch valve and the boiler. The setting through heating the mechanism plays the effect of replacement, compensation to air heater, can ensure cold air's normal supply when air heater trouble, under the unable condition that satisfies boiler temperature needs of air heater, can assist and heat for air temperature satisfies the needs.
Description
Technical Field
The invention relates to a heating device, in particular to an auxiliary heating device for air supply of a boiler of a thermal power plant and a using method thereof.
Background
A thermal power plant, referred to as a thermal power plant, is a plant that produces electric energy using a combustible (e.g., coal) as a fuel. The basic production process is as follows: when the fuel is burnt, water is heated to generate steam, chemical energy of the fuel is converted into heat energy, the steam pressure pushes a steam turbine to rotate, the heat energy is converted into mechanical energy, and then the steam turbine drives a generator to rotate, so that the mechanical energy is converted into electric energy.
In the thermal power generation process, cold air introduced into a boiler needs to be heated by an air preheater in advance, and sometimes the condition that the cold air supply needs to be stopped due to the fault of the air preheater or the temperature of the boiler cannot be met due to the limited hot air output of the air preheater exists in the production process.
In order to solve the problems, the application provides an auxiliary temperature rising device for air supply of a boiler of a thermal power plant and a using method of the auxiliary temperature rising device.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an auxiliary temperature rising device for air supply of a boiler of a thermal power plant and a using method thereof.
The invention provides a heat-engine plant boiler air supply auxiliary heating device, which comprises an air conveying pipeline connected with a boiler, wherein an air feeder and an air preheater are sequentially connected to the air conveying pipeline, and a first switch valve and a second switch valve are respectively connected to the air conveying pipelines on two sides of the air preheater; an air conveying pipeline between the first switch valve and the air feeder is connected with an air inlet pipeline, an air outlet pipeline is connected with an air conveying pipeline between the second switch valve and the boiler, a third switch valve is connected with the air inlet pipeline, and a fourth switch valve is connected with the air outlet pipeline; a heating mechanism is connected between the air inlet pipeline and the air outlet pipeline; the heating mechanism comprises a heating box, a combustion pipeline is arranged in the heating box, and the combustion pipeline extends out of the heating box and is connected with the combustor; the outlet of the combustion pipeline and the inside of the pipeline are respectively provided with a conical cap, the vertex of each conical cap is positioned at one side close to the combustor, and the diameter of the bottom surface of each conical cap is smaller than that of the combustion pipeline; the other side of the heating box opposite to the burner is provided with an induced draft fan, a motor of the induced draft fan is positioned outside the heating box, blades of the induced draft fan are positioned inside the heating box and opposite to an outlet of the combustion pipeline, a hot gas conveying pipeline is arranged in the heating box and communicated with a gas outlet pipeline, the blades of the induced draft fan are positioned inside the hot gas conveying pipeline, and a gas inlet is arranged on the position, opposite to the blades, of the hot gas conveying pipeline; the heating box is internally provided with a gas transmission coil which surrounds a combustion pipeline, the gas inlet end of the gas transmission coil is connected with a gas inlet pipeline, the gas outlet end of the gas transmission coil is communicated with the combustion pipeline, and the connecting position of the gas transmission coil and the combustion pipeline is positioned between a combustor and a conical cap in the pipeline.
Preferably, the combustion duct is mounted on a bracket fixedly attached to the bottom surface of the heating chamber.
Preferably, the conical cap is connected to the combustion pipe by a connecting strip.
Preferably, a heat insulation baffle is arranged between the conical cap and the blades and is fixedly connected with a bottom plate of the heating box.
The invention provides a use method of an auxiliary temperature rising device for air supply of a boiler of a thermal power plant, which comprises the following steps:
firstly, when the air preheater operates normally and can meet the heating requirement, a first switch valve and a second switch valve are both opened, a third switch valve and a fourth switch valve are both closed, and cold air is heated through the air preheater;
when the air preheater fails and cannot be used, closing the first switch valve and the second switch valve, opening the third switch valve and the fourth switch valve, and heating cold air through the heating mechanism;
and thirdly, when the air preheater normally works but cannot meet the heating requirement, the first switch valve, the second switch valve, the third switch valve and the fourth switch valve are all opened, and the air preheater and the heating mechanism are matched for heating.
The invention has the beneficial effects that:
1. the setting through heating the mechanism plays the effect of replacement, compensation to air heater, can ensure cold air's normal supply when air heater trouble, under the unable condition that satisfies boiler temperature needs of air heater, can assist and heat for air temperature satisfies the needs.
2. The gas transmission coil pipe is surrounded on the combustion pipeline, so that the air can be heated and heated in the transmission process, when the air in the gas transmission coil pipe is transmitted to the combustion pipeline, the air cannot be directly transmitted forwards due to the existence of the conical cap in the pipeline, and the detention time of the air in the combustion pipeline is prolonged. The air after the heating gets into between two toper caps for the air can not directly be carried forward because the existence of pipeline exit toper cap, and the dwell time of air in the combustion duct is prolonged once more, heats the back through twice extension, and the temperature of air is promoted rapidly. The cold air in the air conveying pipeline enters the heating box, the air in the heating box is heated by the burner, and the hot air is sent back to the air conveying pipeline again through the hot air conveying pipeline by the suction of the draught fan, so that the heating of the air is realized.
3. The blocking through the conical cap can change the spray direction of the flame, the flame is sprayed obliquely instead of linearly, and therefore the direct contact between the flame and the blades is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
shown in the figure:
1. boiler, 2, air conveying pipeline, 3, forced draught blower, 4, air heater, 5, first ooff valve, 6, second ooff valve, 7, the pipeline of giving vent to anger, 8, fourth ooff valve, 9, third ooff valve, 10, inlet duct, 11, the case that adds warms up, 12, combustor, 13, the combustion duct, 14, the toper cap, 15, connection slat, 16, thermal-insulated baffle, 17, the draught fan, 18, steam conveying pipeline, 19, the blade, 20, the air inlet, 21, the gas transmission coil pipe, 22, the support.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
An auxiliary temperature raising device for air supply of a boiler 1 of a thermal power plant comprises an air conveying pipeline 2 connected with the boiler 1, an air supply machine 3 and an air preheater 4 are sequentially connected onto the air conveying pipeline 2, and a first switch valve 5 and a second switch valve 6 are respectively connected onto the air conveying pipelines 2 on two sides of the air preheater 4. An air inlet pipeline 10 is connected to the air conveying pipeline 2 between the first switch valve 5 and the blower 3, an air outlet pipeline 7 is connected to the air conveying pipeline 2 between the second switch valve 6 and the boiler 1, a third switch valve 9 is connected to the air inlet pipeline 10, and a fourth switch valve 8 is connected to the air outlet pipeline 7. A heating mechanism is connected between the air inlet pipeline 10 and the air outlet pipeline 7.
The heating mechanism comprises a heating box 11, a combustion pipeline 13 is arranged in the heating box 11, the combustion pipeline 13 extends out of the heating box 11 and is connected with a combustor 12, the combustor 12 takes natural gas, liquefied petroleum gas and the like as fuel, and the combustor 12 adopts the existing structure. A conical cap 14 is respectively arranged at the outlet of the combustion pipeline 13 and in the pipeline, the vertex of each conical cap 14 is positioned at one side close to the combustor 12, and the diameter of the bottom surface of each conical cap 14 is smaller than that of the combustion pipeline 13. The direction of the flame spray can be changed by the obstruction of the conical cap 14, the flame spray obliquely rather than linearly, thereby reducing the direct contact of the flame with the blades 19. The opposite side of the warming box 11 opposite to the combustor 12 is provided with an induced draft fan 17, a motor of the induced draft fan 17 is positioned outside the warming box 11, blades 19 of the induced draft fan 17 are positioned inside the warming box 11 and opposite to an outlet of the combustion pipeline 13, a hot gas conveying pipeline 18 is installed in the warming box 11, the hot gas conveying pipeline 18 is communicated with the gas outlet pipeline 7, the blades 19 of the induced draft fan 17 are positioned inside the hot gas conveying pipeline 18, and a gas inlet 20 is arranged at a position, opposite to the blades 19, on the hot gas conveying pipeline 18. The heating box 11 is internally provided with a gas transmission coil 21, the gas transmission coil 21 surrounds the combustion pipeline 13, the gas inlet end of the gas transmission coil 21 is connected with the gas inlet pipeline 10, the gas outlet end of the gas transmission coil 21 is communicated with the combustion pipeline 13, and the connecting position of the gas transmission coil 21 and the combustion pipeline 13 is positioned between the combustor 12 and the conical cap 14 in the pipeline. The air conveying coil 21 is surrounded on the combustion pipe 13, so that the air can be heated and heated in the conveying process, when the air in the air conveying coil 21 is conveyed to the combustion pipe 13, the air cannot be conveyed forward directly due to the conical cap 14 in the pipe, and the residence time of the air in the combustion pipe 13 is prolonged. The heated air enters between the two conical caps 14, the air cannot be directly conveyed forwards due to the existence of the conical caps 14 at the outlet of the pipeline, the residence time of the air in the combustion pipeline 13 is prolonged again, and the temperature of the air is rapidly increased after the air is heated by two times of prolonging. The cold air in the air conveying pipeline 2 enters the warming box 11, the combustor 12 burns to heat the air in the warming box 11, and the hot air is sucked by the draught fan 17 and sent back to the air conveying pipeline 2 through the hot air conveying pipeline 18 to realize the heating of the air.
In the present embodiment, the combustion duct 13 is mounted on a bracket 22 fixed to the bottom surface of the heating chamber 11.
In the present embodiment, the cone cap 14 is connected to the combustion duct 13 by a connecting strip 15. The connecting strips 15 serve for the connection, but do not affect the output of hot gases and flames.
In this embodiment, a thermal insulation baffle 16 is disposed between the conical cap 14 and the blades 19, the thermal insulation baffle 16 is fixedly connected to the bottom plate of the warming box 11, and the thermal insulation baffle can reduce direct contact between flames and the blades 19 without affecting the flow of hot air.
A use method of an auxiliary temperature rising device for air supply of a boiler 1 of a thermal power plant comprises the following steps:
firstly, when the air preheater 4 operates normally and can meet the heating requirement, the first switch valve 5 and the second switch valve 6 are both opened, the third switch valve 9 and the fourth switch valve 8 are both closed, and cold air is heated through the air preheater 4;
secondly, when the air preheater 4 fails and cannot be used, the first switch valve 5 and the second switch valve 6 are closed, the third switch valve 9 and the fourth switch valve 8 are opened, and cold air is heated through the heating mechanism;
and thirdly, when the air preheater 4 normally works but cannot meet the heating requirement, the first switch valve 5, the second switch valve 6, the third switch valve 9 and the fourth switch valve 8 are all opened, and the air preheater 4 and the heating mechanism are matched for heating.
Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention can be implemented by or using the prior art, and will not be described herein again; the above embodiments and drawings are only for illustrating the technical solutions of the present invention and not for limiting the present invention, and the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that changes, modifications, additions or substitutions within the spirit and scope of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and shall also fall within the scope of the claims of the present invention.
Claims (5)
1. The utility model provides a supplementary rising temperature device of boiler air supply of thermal power plant which characterized in that: the system comprises an air conveying pipeline connected with a boiler, wherein an air feeder and an air preheater are sequentially connected to the air conveying pipeline, and a first switch valve and a second switch valve are respectively connected to the air conveying pipelines on two sides of the air preheater; an air conveying pipeline between the first switch valve and the air feeder is connected with an air inlet pipeline, an air outlet pipeline is connected with an air conveying pipeline between the second switch valve and the boiler, a third switch valve is connected with the air inlet pipeline, and a fourth switch valve is connected with the air outlet pipeline; a heating mechanism is connected between the air inlet pipeline and the air outlet pipeline; the heating mechanism comprises a heating box, a combustion pipeline is arranged in the heating box, and the combustion pipeline extends out of the heating box and is connected with the combustor; the outlet of the combustion pipeline and the inside of the pipeline are respectively provided with a conical cap, the vertex of each conical cap is positioned at one side close to the combustor, and the diameter of the bottom surface of each conical cap is smaller than that of the combustion pipeline; the other side of the heating box opposite to the burner is provided with an induced draft fan, a motor of the induced draft fan is positioned outside the heating box, blades of the induced draft fan are positioned inside the heating box and opposite to an outlet of the combustion pipeline, a hot gas conveying pipeline is arranged in the heating box and communicated with a gas outlet pipeline, the blades of the induced draft fan are positioned inside the hot gas conveying pipeline, and a gas inlet is arranged on the position, opposite to the blades, of the hot gas conveying pipeline; the heating box is internally provided with a gas transmission coil which surrounds a combustion pipeline, the gas inlet end of the gas transmission coil is connected with a gas inlet pipeline, the gas outlet end of the gas transmission coil is communicated with the combustion pipeline, and the connecting position of the gas transmission coil and the combustion pipeline is positioned between a combustor and a conical cap in the pipeline.
2. The auxiliary temperature rising device for the air supply of the boiler of the thermal power plant as claimed in claim 1, wherein: the combustion pipeline is arranged on a bracket fixedly connected with the bottom surface of the heating box.
3. The auxiliary temperature rising device for the air supply of the boiler of the thermal power plant as claimed in claim 2, wherein: the conical cap is connected with the combustion pipeline through the connecting ribbon board.
4. The auxiliary temperature rising device for the air supply of the boiler of the thermal power plant as claimed in claim 1, wherein: a heat insulation baffle is arranged between the conical cap and the blades and is fixedly connected with a bottom plate of the heating box.
5. The temperature elevating device as set forth in any one of claims 1 to 4, wherein the method of using the device comprises the steps of:
firstly, when the air preheater operates normally and can meet the heating requirement, a first switch valve and a second switch valve are both opened, a third switch valve and a fourth switch valve are both closed, and cold air is heated through the air preheater;
when the air preheater fails and cannot be used, closing the first switch valve and the second switch valve, opening the third switch valve and the fourth switch valve, and heating cold air through the heating mechanism;
and thirdly, when the air preheater normally works but cannot meet the heating requirement, the first switch valve, the second switch valve, the third switch valve and the fourth switch valve are all opened, and the air preheater and the heating mechanism are matched for heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011590404.2A CN112856475A (en) | 2020-12-29 | 2020-12-29 | Auxiliary temperature rising device for air supply of boiler of thermal power plant and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011590404.2A CN112856475A (en) | 2020-12-29 | 2020-12-29 | Auxiliary temperature rising device for air supply of boiler of thermal power plant and application method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112856475A true CN112856475A (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011590404.2A Pending CN112856475A (en) | 2020-12-29 | 2020-12-29 | Auxiliary temperature rising device for air supply of boiler of thermal power plant and application method thereof |
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| CN (1) | CN112856475A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113562412A (en) * | 2021-09-26 | 2021-10-29 | 龙口源美包装有限公司 | Automatic positioning and feeding device for plastic containers |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH588204A5 (en) * | 1974-03-23 | 1977-05-31 | Fischachtaler Maschinenbau Gmb | |
| GB8829086D0 (en) * | 1988-12-13 | 1989-01-25 | Nordsea Gas Tach | Space heating apparatus |
| CN201443867U (en) * | 2009-07-30 | 2010-04-28 | 闫明宇 | Full-automatic self-cooing direct heating type hot-blast stove |
| CN202470403U (en) * | 2012-03-08 | 2012-10-03 | 陈培德 | Hot air heating stove |
| CN104180524A (en) * | 2014-08-26 | 2014-12-03 | 唐山金沙燃烧热能科技有限公司 | High-temperature high-pressure indirect self-suspending hot-blast stove |
| CN212081304U (en) * | 2020-03-13 | 2020-12-04 | 中国能源建设集团江苏省电力设计院有限公司 | Secondary air system with double-row auxiliary boiler |
-
2020
- 2020-12-29 CN CN202011590404.2A patent/CN112856475A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH588204A5 (en) * | 1974-03-23 | 1977-05-31 | Fischachtaler Maschinenbau Gmb | |
| GB8829086D0 (en) * | 1988-12-13 | 1989-01-25 | Nordsea Gas Tach | Space heating apparatus |
| CN201443867U (en) * | 2009-07-30 | 2010-04-28 | 闫明宇 | Full-automatic self-cooing direct heating type hot-blast stove |
| CN202470403U (en) * | 2012-03-08 | 2012-10-03 | 陈培德 | Hot air heating stove |
| CN104180524A (en) * | 2014-08-26 | 2014-12-03 | 唐山金沙燃烧热能科技有限公司 | High-temperature high-pressure indirect self-suspending hot-blast stove |
| CN212081304U (en) * | 2020-03-13 | 2020-12-04 | 中国能源建设集团江苏省电力设计院有限公司 | Secondary air system with double-row auxiliary boiler |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113562412A (en) * | 2021-09-26 | 2021-10-29 | 龙口源美包装有限公司 | Automatic positioning and feeding device for plastic containers |
| CN113562412B (en) * | 2021-09-26 | 2021-12-07 | 龙口源美包装有限公司 | Automatic positioning and feeding device for plastic containers |
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Application publication date: 20210528 |