CN110578916A - Siphon type drainage device of horizontal boiler snakelike tubular economizer - Google Patents
Siphon type drainage device of horizontal boiler snakelike tubular economizer Download PDFInfo
- Publication number
- CN110578916A CN110578916A CN201910254723.7A CN201910254723A CN110578916A CN 110578916 A CN110578916 A CN 110578916A CN 201910254723 A CN201910254723 A CN 201910254723A CN 110578916 A CN110578916 A CN 110578916A
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- China
- Prior art keywords
- economizer
- channel
- horizontal
- drainage device
- siphon
- 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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- 239000003245 coal Substances 0.000 claims abstract description 13
- 230000008020 evaporation Effects 0.000 claims abstract description 10
- 238000001704 evaporation Methods 0.000 claims abstract description 10
- 230000001012 protector Effects 0.000 claims abstract description 10
- 230000035939 shock Effects 0.000 claims abstract description 5
- 239000004071 soot Substances 0.000 claims abstract description 5
- 238000004056 waste incineration Methods 0.000 claims abstract description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000004140 cleaning Methods 0.000 claims abstract description 3
- 239000003546 flue gas Substances 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 230000005484 gravity Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 4
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 3
- 230000002706 hydrostatic effect Effects 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 239000008400 supply water Substances 0.000 claims 1
- 239000010813 municipal solid waste Substances 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 6
- 230000008014 freezing Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Sink And Installation For Waste Water (AREA)
Abstract
The invention relates to the field of municipal solid waste incineration, in particular to a siphon drainage device for an emptying serpentine pipe type economizer of a horizontal boiler. The siphon type drainage device of the horizontal boiler snakelike tubular economizer comprises a first channel (2), a second channel connecting channel (3), a second channel (4), a third channel (5) and a horizontal channel (6) in sequence according to the flow direction of flue gas; wherein, an evaporation protector I (7), a high-temperature superheater (8), a medium-temperature superheater (9), a low-temperature superheater (10), an evaporation protector II (11), an economizer (12) and a siphon type drainage device (14) are sequentially arranged in the horizontal channel (6); the coal economizer (12) is positioned in a low-temperature area, and a shock wave soot blower (13) is adopted for cleaning ash so as to reduce the initial investment and the operation cost of equipment; the coal economizer (12) adopts a coiled pipe structure. The invention prolongs the service life of the economizer and can be used for the drainage problem of other serpentine tube structures.
Description
Technical Field
The invention relates to the field of municipal solid waste incineration, in particular to a horizontal boiler for incinerating municipal solid waste, which is a serpentine tube type economizer waste and can not be emptied of water after furnace shutdown or hydraulic pressure test.
Background
At present, domestic and foreign waste incineration power plant boilers have the defects of high leakage risk and inconvenient maintenance due to the fact that upper and lower header type coal economizer welded junctions are multiple, so that the coal economizers of partial waste boilers adopt coiled pipe type heat exchangers at present. The coiled pipe type heat exchanger has few welded junctions, simple processing and easy maintenance. Compared with a vertical boiler, the horizontal boiler has the advantages that the ash removal effect is good, the ash deposition degree is lighter relative to the vertical boiler, the later operation and maintenance are convenient, and the like. Some horizontal boilers adopt compressed air to blow or directly store water in a serpentine pipe after blowing out or hydraulic pressure test, and the chemical is added for storage, so that the risk of damaging the pipe bundle due to freezing expansion is not economical and exists in winter.
The invention relates to a siphon type drainage device for draining accumulated water in a horizontal boiler serpentine pipe type economizer after furnace shutdown or hydraulic pressure test by utilizing the siphon principle. Therefore, the problems that the water in the coiled pipe cannot be drained to cause corrosion, the pipe bundle is damaged by freezing and expansion in winter and the like are effectively solved, the service life of the economizer is prolonged, and long-term safe and stable operation is ensured.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a siphon type drainage device of a horizontal boiler snakelike tube type economizer, wherein the horizontal boiler is a conventional garbage incineration horizontal boiler and is of a single-drum horizontal suspension structure; according to the flowing direction of the smoke, a first channel (2), a second channel connecting channel (3), a second channel (4), a third channel (5) and a horizontal channel (6) are arranged in sequence; wherein, an evaporation protector I (7), a high-temperature superheater (8), a medium-temperature superheater (9), a low-temperature superheater (10), an evaporation protector II (11), an economizer (12) and a siphon type drainage device (14) are sequentially arranged in the horizontal channel (6); the coal economizer (12) is positioned in a low-temperature area, and a shock wave soot blower (13) is adopted for cleaning ash so as to reduce the initial investment and the operation cost of equipment; the coal economizer (12) adopts a serpentine tube structure, and has the advantages of low manufacturing cost, no fillet weld leakage risk, easiness in maintenance and the like compared with the conventional upper and lower header structures. Meanwhile, a siphon type drainage device (14) is arranged to solve the problem that accumulated water in the tube bundle of the economizer cannot be drained after furnace shutdown or hydraulic pressure test.
Furthermore, the feed water sequentially passes through the three-stage economizer from the economizer inlet header (19) and then enters the steam pocket through the economizer outlet header (20).
Furthermore, the siphon-type drainage device (14) consists of a pipeline (17) and a manual stop valve 1(16) and a manual stop valve 2(18), wherein the pipeline (17) is provided with a hole on an economizer inlet header (19). When the boiler starts to feed water, the manual stop valves 2(18) and 1(16) are closed in sequence after the pipeline (17) is filled with water. When the hydrostatic test is finished or the furnace is stopped, the electric regulating valve 1(22) is closed, then the air release valve (21), the manual stop valve 1(16) and the manual stop valve 2(18) are opened in sequence, water columns with the length of about 19m of the pipeline (17) fall down by gravity, and water in the serpentine type coal economizer is emptied by utilizing the siphon principle.
The technical effects are as follows:
1. The coal economizer adopts a coiled pipe structure, reduces the manufacturing cost, avoids the fillet weld leakage risk existing in an upper header structure and a lower header structure, and is convenient to overhaul.
2. The economizer is provided with a siphon type drainage device, so that the problems of corrosion caused by water accumulation, damage to a pipe bundle due to freezing expansion in winter and the like after the horizontal boiler coil type economizer is shut down or subjected to a hydraulic pressure test are solved.
3. The siphon type drainage device has simple structure and basically does not increase investment and operation cost.
4. The operation is simple, when the siphon type drainage device is used for feeding water to a boiler for the first time, the manual stop valves 2, 18 and 1, 16 are closed in sequence after the pipeline (17) is filled with water. After the furnace is stopped or the hydraulic pressure test is carried out, the electric regulating valve 1(22) is closed, the air release valve (21), the manual stop valve 1(16) and the manual stop valve 2(18) are opened in sequence, water columns with the diameter of about 19m in the pipeline (17) fall by gravity, and water in the economizer is emptied by siphoning.
5. The siphon type drainage device can be suitable for drainage of any serpentine tube type structure, compressed air purging is not needed, and operation and maintenance are simple.
In conclusion, the siphon drainage device of the economizer is simple in structure, accumulated water in the economizer is drained after a boiler is shut down or a hydraulic test is carried out, the problems that the accumulated water in the economizer cannot be drained to cause corrosion, a pipe bundle is damaged by freezing in winter and the like are solved, the service life of the economizer is prolonged, and long-term safe and stable operation is ensured.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of a horizontal boiler for incinerating garbage.
FIG. 2 is a schematic view of a siphonic drainage device.
In the figure 1, a combustion chamber, 2, a channel, 3, a second channel and a second channel are connected with a flue, 4, a second channel, 5, a third channel, 6, a horizontal channel, 7, an evaporation protector I, 8, a high-temperature superheater, 9, a medium-temperature superheater, 10, a low-temperature superheater, 11, an evaporation protector II, 12, an economizer, 13, a shock wave soot blower and 14, a siphon type drainage device.
In FIG. 2, 15 electric control valves 1 and 16, manual stop valves 1 and 17, a pipeline, 18, manual stop valves 2 and 19, an economizer inlet header, 20, an economizer outlet header, 21, a vent valve and 22 are electric control valves 2.
Detailed Description
In fig. 1, the garbage is burned in the incinerator system, the generated high-temperature flue gas enters the garbage incinerator for waste heat recovery, and high-quality steam is generated and sent to the steam turbine generator set. According to the flowing direction of the smoke, a first channel (2), a second channel connecting channel (3), a second channel (4), a third channel (5) and a horizontal channel (6) are arranged in sequence. Wherein, an evaporation protector I (7), a high-temperature superheater (8), a medium-temperature superheater (9), a low-temperature superheater (10), an evaporation protector II (11), an economizer (12) and a siphon type drainage device (14) are sequentially arranged in the horizontal channel (6). The coal economizer (12) is positioned in a low-temperature area, and a shock wave soot blower (13) is adopted for ash removal so as to reduce the initial investment and the running cost of equipment. The coal economizer (12) adopts a serpentine tube structure, and has the advantages of low manufacturing cost, no fillet weld leakage risk, easiness in maintenance and the like compared with the conventional upper and lower header structures. Meanwhile, a siphon type drainage device (14) is arranged to solve the problem that accumulated water in the tube bundle of the economizer cannot be drained after furnace shutdown or hydraulic pressure test.
In fig. 2, feed water sequentially passes through three stages of economizers from an economizer inlet header (19) and then enters a steam drum through an economizer outlet header (20).
The siphon type drainage device consists of a pipeline (17), a manual stop valve 1(16) and a manual stop valve 2(18), wherein the pipeline (17) is provided with a hole on an inlet header (19) of the economizer. When the boiler starts to feed water, the manual stop valves 2(18) and 1(16) are closed in sequence after the pipeline (17) is filled with water. When the hydrostatic test is finished or the furnace is stopped, the electric regulating valve 1(22) is closed, then the air release valve (21), the manual stop valve 1(16) and the manual stop valve 2(18) are opened in sequence, water columns with the length of about 19m of the pipeline (17) fall down by gravity, and water in the serpentine type coal economizer is emptied by utilizing the siphon principle.
The siphon principle is that after liquid is filled in an inverted U-shaped tubular structure by utilizing the action force phenomenon of liquid level difference, one end with a high opening is placed in a container filled with the liquid, and the liquid in the container can continuously flow out to a lower position through a siphon. The essence of siphoning is due to gravity and intermolecular cohesion. Liquid at the highest point in the pipe in the device moves towards the low-position pipe opening under the action of gravity, negative pressure is generated inside the U-shaped pipe, and the liquid at the high-position pipe opening is sucked into the highest point, so that the liquid can continuously flow into the low-position container.
The invention is composed of four manual stop valves and a section of pipeline from an economizer inlet header to 0m layer, has simple structure and low investment and operation cost, thoroughly solves the problems of corrosion caused by water accumulation in the pipeline and pipe bundle damage caused by freezing expansion in winter in the north after the horizontal boiler snakelike pipe type economizer is shut down and a hydraulic test, prolongs the service life of the economizer, and can be used for draining water in other snakelike pipe structures.
Claims (6)
1. A siphon type drainage device of a horizontal boiler snakelike tubular economizer is characterized in that a first channel (2), a second channel connecting channel (3), a second channel (4), a third channel (5) and a horizontal channel (6) are sequentially arranged in the flow direction of flue gas; wherein, an evaporation protector I (7), a high-temperature superheater (8), a medium-temperature superheater (9), a low-temperature superheater (10), an evaporation protector II (11), an economizer (12) and a siphon type drainage device (14) are sequentially arranged in the horizontal channel (6); the coal economizer (12) is positioned in a low-temperature area, and a shock wave soot blower (13) is adopted for cleaning ash so as to reduce the initial investment and the operation cost of equipment; the coal economizer (12) adopts a coiled pipe structure.
2. The siphon-type drain device of the horizontal boiler serpentine tube type economizer according to claim 1, wherein the feed water sequentially passes through three stages of economizers from an economizer inlet header (19) and then enters the steam drum through an economizer outlet header (20).
3. The siphon-type drainage device of the horizontal boiler serpentine economizer according to claim 1, wherein the siphon-type drainage device (14) comprises a pipe (17) and a manual stop valve 1(16), a manual stop valve 2(18), and the pipe (17) is provided with an opening on an economizer inlet header (19).
4. The siphonic drainage device of the horizontal boiler serpentine tube economizer according to claim 1, wherein the horizontal boiler is a waste incineration horizontal boiler.
5. The siphonic drainage device of the horizontal boiler serpentine pipe type economizer according to claim 4, wherein the horizontal waste incineration boiler is of a single-drum horizontal suspension structure.
6. A method for using the siphon-type drain device of the horizontal boiler serpentine tube economizer according to claim 3, wherein when the boiler starts to supply water, the manual cut-off valve 2(18) and the cut-off valve 1(16) are closed in sequence after the pipeline (17) is filled with water; when the hydrostatic test is finished or the furnace is stopped, the electric regulating valve 1(22) is closed, then the air release valve (21), the manual stop valve 1(16) and the manual stop valve 2(18) are opened in sequence, the water column of the pipeline (17) falls down by gravity, and the water in the coiled pipe type economizer is emptied by utilizing the siphon principle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910254723.7A CN110578916A (en) | 2019-03-31 | 2019-03-31 | Siphon type drainage device of horizontal boiler snakelike tubular economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910254723.7A CN110578916A (en) | 2019-03-31 | 2019-03-31 | Siphon type drainage device of horizontal boiler snakelike tubular economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110578916A true CN110578916A (en) | 2019-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910254723.7A Pending CN110578916A (en) | 2019-03-31 | 2019-03-31 | Siphon type drainage device of horizontal boiler snakelike tubular economizer |
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| CN (1) | CN110578916A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503532A (en) * | 2021-05-25 | 2021-10-15 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Boiler blow pipe method for preventing overtemperature of platen superheater |
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2019
- 2019-03-31 CN CN201910254723.7A patent/CN110578916A/en active Pending
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113503532A (en) * | 2021-05-25 | 2021-10-15 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Boiler blow pipe method for preventing overtemperature of platen superheater |
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