CN109538920B - Air preheater drainage system for garbage incineration power generation - Google Patents
Air preheater drainage system for garbage incineration power generation Download PDFInfo
- Publication number
- CN109538920B CN109538920B CN201811209495.3A CN201811209495A CN109538920B CN 109538920 B CN109538920 B CN 109538920B CN 201811209495 A CN201811209495 A CN 201811209495A CN 109538920 B CN109538920 B CN 109538920B
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- China
- Prior art keywords
- pressure
- low
- pressure section
- pipe
- air preheater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000010248 power generation Methods 0.000 title claims abstract description 15
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000004056 waste incineration Methods 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000005871 repellent Substances 0.000 abstract 4
- 239000007789 gas Substances 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/38—Component parts; Accessories
-
- 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
-
- 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
Abstract
The invention discloses an air preheater drainage system for garbage incineration power generation, which belongs to the technical field of environmental protection, and comprises the following components: the device comprises a first air preheater, a second air preheater, a hydrophobic tank and a deaerator, wherein the interior of the first air preheater is divided into a first high-pressure section and a first low-pressure section; the left and right of the second air preheater are separated to form a second high-pressure section and a second low-pressure section; an inlet of the second high-pressure section is communicated with a high-pressure steam inlet pipe, and an outlet of the second high-pressure section is communicated with an inlet of the first low-pressure section; an inlet of the second low-pressure section is communicated with a low-pressure steam inlet pipe, and an outlet of the second low-pressure section is communicated with an inlet of the first high-pressure section; the outlet of the first high-pressure section is connected with the water-repellent tank and the deaerator in parallel through a high-pressure water-repellent pipe, and the outlet of the first low-pressure section is connected with the water-repellent tank and the deaerator in parallel through a low-pressure water-repellent pipe. The invention brings the efficiency of the high-low pressure heat exchanger into play, can ensure that the high-low pressure hydrophobic temperature is less than 96 ℃ and avoids the flash evaporation phenomenon.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to an air preheater drainage system for garbage incineration power generation.
Background
The primary air of the boiler is heated by adopting a steam air preheater, each boiler is provided with a group of primary air steam air preheaters, the air volume design value is 39800Nm < 3 >/h, and the steam air preheaters are divided into two stages. The first stage air preheater heats the air from 15 to 140 c using low pressure steam (1.1 Mpa (g) at 276 c) from a turbine. The second stage air preheater was heated with saturated steam (pressure 4.0Mpa (g), temperature 262.7 ℃). The upper air was heated from 140 ℃ to 230 ℃. However, the actual air preheater temperature can only reach around 190 ℃. The air preheater suffers from the following problems: the air preheater has more water drain steam, so that the problem of broken drain pipeline leakage is caused; the vaporization latent heat of the steam is not fully utilized, and the heating steam has low utilization efficiency; the deaerator pressure is higher; the low primary air temperature affects the tonnage and combustion quality of garbage incineration; the corrosion and leakage of the hydrophobic pipes increases the workload of the operators and service personnel.
Disclosure of Invention
The invention aims to solve the technical problem of providing an air preheater drainage system for garbage incineration power generation aiming at the defects in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme: an air preheater drainage system for waste incineration power generation, comprising: the device comprises a first air preheater, a second air preheater, a hydrophobic tank and a deaerator, wherein the first air preheater is internally divided into a first high-pressure section and a first low-pressure section; the left and right of the second air preheater are separated to form a second high-pressure section and a second low-pressure section; an inlet of the second high-pressure section is communicated with a high-pressure steam inlet pipe, and an outlet of the second high-pressure section is communicated with an inlet of the first low-pressure section; an inlet of the second low-pressure section is communicated with a low-pressure steam inlet pipe, and an outlet of the second low-pressure section is communicated with an inlet of the first high-pressure section; the first high-pressure section outlet is connected with the drain tank and the deaerator in parallel through a high-pressure drain pipe, and the first low-pressure section outlet is connected with the drain tank and the deaerator in parallel through a low-pressure drain pipe.
Preferably, the high-pressure drain pipe is provided with a high-pressure drain valve, a first bypass pipe is arranged beside the high-pressure drain valve, and a first stop valve is arranged on the first bypass pipe.
Preferably, the low-pressure drain pipe is provided with a low-pressure drain valve, a second bypass pipe is arranged beside the low-pressure drain valve, and a second stop valve is arranged on the second bypass pipe.
Preferably, the high-pressure water drain pipe and the low-pressure water drain pipe sequentially comprise a first water drain pipe, a second water drain pipe and a third water drain pipe along the steam flow direction.
Preferably, the pipe diameter of the first drain pipe is 108mm, the pipe diameter of the second drain pipe is 160mm, and the pipe diameter of the third drain pipe is 219mm.
Preferably, the first high-pressure section, the first low-pressure section, the second high-pressure section and the second low-pressure section are provided with fin tube heat exchangers.
Preferably, the fin tube heat exchanger is disposed at an inclination angle α, and the angle α is 10 ° to 30 °.
Preferably, the fin distance in the fin tube heat exchanger is 25mm, and the fin thickness is 3mm.
Preferably, the diameter of a gas collecting tube in the fin tube heat exchanger is 219mm, the diameter of a single tube is 50mm, and the pressure resistance of a pipeline is more than or equal to 6MPa.
The beneficial effects of the invention are as follows: according to the invention, through the arrangement of the first air preheater and the second air preheater, the efficiency of the high-low pressure heat exchanger is exerted to the greatest extent, and meanwhile, the high-low pressure hydrophobic temperature is ensured to be less than 96 ℃, so that the flash evaporation phenomenon is avoided; the flow velocity and impact force of the steam-water mixture are reduced through the gradual expansion treatment of the hydrophobic pipeline.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic illustration of a high pressure hydrophobic pipe and a low pressure hydrophobic pipe in accordance with the present invention;
FIG. 3 is a schematic view of a finned tube heat exchanger of the present invention;
FIG. 4 is a schematic view of another angle of the structure of the finned tube of the present invention.
Reference numerals illustrate:
1-a first air preheater; 2-a second air preheater; 3-a hydrophobic tank; 4-deaerator; 5-a first high pressure section; 6-a first low pressure section; 7-a second high pressure section; 8-a second low pressure section; 9-high pressure steam inlet pipe; 10-inlet of the second high pressure section; 11-the outlet of the second high-pressure section; 12-inlet of the first low pressure section; 13-low pressure steam inlet pipe; 14-inlet of the second low pressure section; 15-the outlet of the second low pressure section; 16-inlet of the first high pressure section; 17-a first high pressure section outlet; 18-a high-pressure drain pipe; 19-a first low pressure section outlet; 20-a low-pressure drain pipe; 21-a high pressure drain valve; 22-a first bypass pipe; 23-a first stop valve; 24-low pressure drain valve; 25-a second bypass pipe; 26-a second shut-off valve; 181-a first hydrophobic pipe; 182-a second hydrophobic pipe; 183-a third hydrophobic pipe; 51-fin tube heat exchanger; 52-a gas collecting tube; 53-fins; 54-single tube.
Detailed Description
The present invention is described in further detail below with reference to examples to enable those skilled in the art to practice the same by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 1, the present embodiment provides an air preheater drainage system for garbage incineration power generation, comprising: the air conditioning system comprises a first air preheater 1, a second air preheater 2, a drain tank 3 and a deaerator 4, wherein the inside of the first air preheater 1 is divided up and down to form a first high-pressure section 5 and a first low-pressure section 6; the left and right of the second air preheater 2 are separated to form a second high-pressure section 7 and a second low-pressure section 8; an inlet 10 of the second high-pressure section is communicated with the high-pressure steam inlet pipe 9, and an outlet 11 of the second high-pressure section is communicated with an inlet 12 of the first low-pressure section; an inlet 14 of the second low pressure section is communicated with the low pressure steam inlet pipe 13, and an outlet 15 of the second low pressure section is communicated with an inlet 16 of the first high pressure section; the first high-pressure section outlet 17 is connected with the drain tank 3 and the deaerator 4 in parallel through a high-pressure drain pipe 18, and the first low-pressure section outlet 19 is connected with the drain tank 3 and the deaerator 4 in parallel through a low-pressure drain pipe 20. The arrangement can bring the efficiency of the high-pressure and low-pressure waste heat exchangers into play, and can ensure that the high-pressure and low-pressure hydrophobic temperature is less than 95 ℃ and avoid the phenomenon of flash evaporation.
As shown in fig. 1, a high-pressure drain valve 21 is arranged on the high-pressure drain pipe 18, a first bypass pipe 22 is arranged beside the high-pressure drain valve 21, and a first stop valve 23 is arranged on the first bypass pipe 22; the low-pressure drain pipe 20 is provided with a low-pressure drain valve 24, a second bypass pipe 25 is arranged beside the low-pressure drain valve 24, and a second stop valve 26 is arranged on the second bypass pipe 25. The drain valve has the function of draining condensed water, air and carbon dioxide gas in the steam system as soon as possible, and simultaneously preventing the steam from leaking to the maximum extent; a stop valve is arranged on the upper side of the bypass pipe, and is normally manually opened at the early stage of steam delivery, so that the stored pressure and condensed water in the pipeline are rapidly discharged as soon as possible, and the stop valve is closed after a large amount of steam is discharged, so that the generated condensed water is discharged through the drain valve. The other effect of the bypass pipeline is that when the drain valve fails, the stop valve can be slightly opened when the steam is stopped temporarily, and the drain valve can be used for draining, so that the system operation can be ensured temporarily.
As shown in fig. 2, the high-pressure drain pipe 18 and the low-pressure drain pipe 20 sequentially comprise a first drain pipe 181, a second drain pipe 182 and a third drain pipe 183 along the steam flow direction, wherein the pipe diameter of the first drain pipe 181 is 108mm, the pipe diameter of the second drain pipe 182 is 160mm, and the pipe diameter of the third drain pipe 183 is 219mm. The hydrophobic pipeline is gradually expanded to reduce the flow velocity and impact force of the steam-water mixture.
As shown in fig. 3 and 4, the first high-pressure section, the first low-pressure section, the second high-pressure section and the second low-pressure section are respectively provided with a finned tube heat exchanger 51, the finned tube heat exchangers 51 are arranged at an inclined angle alpha of 10-30 degrees, the fins 53 in the finned tube heat exchangers are 25mm apart from each other, and the thickness of the fins 53 is 3mm; the diameter of the gas collecting tube 52 in the fin tube heat exchanger 51 is 219mm, the diameter of the single tube 54 is 50mm, the pressure resistance of the pipeline is more than or equal to 6MPa, and the contact area with flue gas is increased.
The direction of air entering the air preheater is shown by the arrow in fig. 1.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Although embodiments of the present invention have been disclosed above, it is not limited to the use of the description and embodiments, it is well suited to various fields of use for the invention, and further modifications may be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the particular details without departing from the general concepts defined in the claims and the equivalents thereof.
Claims (9)
1. An air preheater drainage system for waste incineration power generation, comprising: the device comprises a first air preheater, a second air preheater, a hydrophobic tank and a deaerator, and is characterized in that the inside of the first air preheater is divided into a first high-pressure section and a first low-pressure section; the left and right of the second air preheater are separated to form a second high-pressure section and a second low-pressure section; an inlet of the second high-pressure section is communicated with a high-pressure steam inlet pipe, and an outlet of the second high-pressure section is communicated with an inlet of the first low-pressure section; an inlet of the second low-pressure section is communicated with a low-pressure steam inlet pipe, and an outlet of the second low-pressure section is communicated with an inlet of the first high-pressure section; the first high-pressure section outlet is connected with the water drain tank and the deaerator in parallel through a high-pressure water drain pipe, and the first low-pressure section outlet is connected with the water drain tank and the deaerator in parallel through a low-pressure water drain pipe.
2. The air preheater drainage system for garbage incineration power generation according to claim 1, wherein a high-pressure drain valve is arranged on the high-pressure drain pipe, a first bypass pipe is arranged beside the high-pressure drain valve, and a first stop valve is arranged on the first bypass pipe.
3. The air preheater drainage system for garbage incineration power generation according to claim 1, wherein a low-pressure drain valve is arranged on the low-pressure drain pipe, a second bypass pipe is arranged beside the low-pressure drain valve, and a second stop valve is arranged on the second bypass pipe.
4. The system of claim 3, wherein the high-pressure water drain pipe and the low-pressure water drain pipe each comprise a first water drain pipe, a second water drain pipe and a third water drain pipe in sequence along the steam flow direction.
5. The air preheater drainage system for waste incineration power generation according to claim 4, wherein the pipe diameter of the first drainage pipe is 108mm, the pipe diameter of the second drainage pipe is 160mm, and the pipe diameter of the third drainage pipe is 219mm.
6. The air preheater drain system for waste incineration power generation according to claim 1, wherein finned tube heat exchangers are arranged in the first high-pressure section, the first low-pressure section, the second high-pressure section and the second low-pressure section.
7. The air preheater drainage system for garbage incineration power generation according to claim 6, wherein the fin tube heat exchanger is arranged at an inclined angle α, and the angle α is 10 ° to 30 °.
8. The air preheater drainage system for waste incineration power generation according to claim 7, wherein the fin distance in the fin tube heat exchanger is 25mm, and the fin thickness is 3mm.
9. The drainage system of the air preheater for the garbage incineration power generation according to claim 6, wherein the diameter of a gas collecting tube in the finned tube heat exchanger is 219mm, the diameter of a single tube is 50mm, and the pressure resistance of a pipeline is more than or equal to 6MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811209495.3A CN109538920B (en) | 2018-10-17 | 2018-10-17 | Air preheater drainage system for garbage incineration power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811209495.3A CN109538920B (en) | 2018-10-17 | 2018-10-17 | Air preheater drainage system for garbage incineration power generation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109538920A CN109538920A (en) | 2019-03-29 |
| CN109538920B true CN109538920B (en) | 2024-04-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811209495.3A Active CN109538920B (en) | 2018-10-17 | 2018-10-17 | Air preheater drainage system for garbage incineration power generation |
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| Country | Link |
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| CN (1) | CN109538920B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108167028A (en) * | 2018-01-02 | 2018-06-15 | 武汉都市环保工程技术股份有限公司 | A kind of waste incineration and generating electricity system |
| CN108167807A (en) * | 2018-01-02 | 2018-06-15 | 武汉都市环保工程技术股份有限公司 | Garbage incinerating power plant steam air heater draining system |
| CN108194821A (en) * | 2018-01-02 | 2018-06-22 | 武汉都市环保工程技术股份有限公司 | Garbage incinerating power plant high pressure draining system |
| CN209470013U (en) * | 2018-10-17 | 2019-10-08 | 苏州市朗吉科技有限公司 | Waste incineration and generating electricity air preheater draining system |
-
2018
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2867113Y (en) * | 2005-12-14 | 2007-02-07 | 中国神华能源股份有限公司 | Soot blowing and hydrophobic system used for coal-fired boiler |
| JP2009222285A (en) * | 2008-03-14 | 2009-10-01 | Tlv Co Ltd | Air heating device |
| JP2011157854A (en) * | 2010-01-29 | 2011-08-18 | Chugoku Electric Power Co Inc:The | Heat recovery device and heat recovery method for steam generator in power generation facility |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109538920A (en) | 2019-03-29 |
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Effective date of registration: 20230413 Address after: Building 3, No. 58 Tongxin Road, Tong'an Town, High tech Zone, Suzhou City, Jiangsu Province, 215011 Applicant after: Suzhou Yanjitong New Energy Technology Co.,Ltd. Address before: 215163 building 19, Longshan Industrial Park, 28 Xiexin Road, Dongzhu Town, high tech Zone, Suzhou City, Jiangsu Province Applicant before: SUZHOU LANGJI TECHNOLOGY Co.,Ltd. |
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