CN113203087B - Energy-saving water circulation heating system - Google Patents
Energy-saving water circulation heating system Download PDFInfo
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- CN113203087B CN113203087B CN202110475086.3A CN202110475086A CN113203087B CN 113203087 B CN113203087 B CN 113203087B CN 202110475086 A CN202110475086 A CN 202110475086A CN 113203087 B CN113203087 B CN 113203087B
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- pipeline
- smoke
- connecting pipeline
- raw water
- water circulation
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
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- 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chimneys And Flues (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses an energy-saving water circulation heating system, which comprises a flue gas pipeline, a water circulation loop and a raw water preheating pipeline, wherein the flue gas pipeline is connected with the water circulation loop; wherein the flue gas pipeline comprises a smoke exhaust pipeline, and a coal economizer is arranged in the smoke exhaust pipeline; the water circulation loop comprises a plate heat exchanger and a circulating pump, and the plate heat exchanger, the economizer body and the circulating pump are connected through water pipes to form a circulation loop; the raw water preheating pipeline comprises a cold raw water tank and a hot raw water tank, and the cold raw water tank and the hot raw water tank are respectively connected with the plate heat exchanger through water pipes.
Description
Technical Field
The invention belongs to the technical field of thermoelectricity, and particularly relates to an energy-saving water circulation heating system for a thermoelectricity plant.
Background
When the thermal power plant generates electricity, a large amount of high-temperature flue gas is discharged, the flue gas has high temperature, namely, high energy, and the flue gas is directly discharged, so that the environment is polluted, and energy is wasted.
Some thermal power plants add economizers in the flue gas duct to recover heat.
The Economizer (Economizer) is a device which is arranged at the lower part of a flue at the tail part of a boiler and is used for recovering the waste heat of exhausted smoke, water fed by the boiler is heated into a heating surface of saturated water under the pressure of a steam drum, and the Economizer absorbs the heat of high-temperature smoke, so that the exhaust temperature of the smoke is reduced, the energy is saved, and the efficiency is improved.
The existing coal economizer is directly arranged in a smoke exhaust pipeline, smoke passing through the coal economizer at present contains a large amount of dust and is easy to attach to the surface of a tube bundle of the coal economizer, so that the heat exchange efficiency is low, although some manufacturers add an acoustic wave soot blower or a fixed rotary steam soot blower at the coal economizer at present, the two modes have certain effects on clearing accumulated dust on the tube bundle of the low-temperature coal economizer, the cross section of the whole coal economizer needs to be covered, frequent soot blowing is needed, and the installation structure is high in cost and complex.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method which can recover the heat of flue gas generated by a thermal power plant, reduce the waste of heat and preheat the water for driving a steam turbine.
In order to achieve the purpose, the invention provides the following technical scheme: an energy-saving water circulation heating system comprises a flue gas pipeline, a water circulation loop and a raw water preheating pipeline; wherein the flue gas pipeline comprises a smoke exhaust pipeline, and a coal economizer is arranged in the smoke exhaust pipeline; the water circulation loop comprises a plate heat exchanger and a circulating pump, and the plate heat exchanger, the economizer body and the circulating pump are connected through a water pipe to form a circulation loop; the raw water preheating pipeline comprises a cold raw water tank and a hot raw water tank, and the cold raw water tank and the hot raw water tank are respectively connected with the plate heat exchanger through water pipes.
The further economizer includes the economizer body, advances cigarette connecting tube and goes out the cigarette connecting tube, advance the cigarette connecting tube and go out the cigarette connecting tube and be located the both sides of economizer body respectively, it is provided with the filter screen that the slope was arranged in the cigarette connecting tube to advance, the filter screen from top to bottom inclines to economizer body direction gradually, the bottom of advancing the cigarette connecting tube is provided with the ash collecting hopper, and the ash collecting hopper is located the filter screen below.
Further it all is provided with supporting spring to advance the upper and lower both sides department that cigarette connecting tube corresponds the filter screen, and the edge connection of filter screen is on supporting spring.
And further, a connecting plate is arranged on the supporting spring and is connected with the filter screen through a bolt.
Further, a baffle is arranged on the front side of the smoke inlet connecting pipeline corresponding to the supporting spring.
Further the filter screen is connected with a vibration motor.
Further, an assembly opening is formed in the side face of the smoke inlet connecting pipeline.
Furthermore, the bottom of the smoke inlet connecting pipeline is horizontally arranged and is flush with the bottom of the coal economizer body, the top of the smoke inlet connecting pipeline is obliquely arranged and is connected with one side of the coal economizer body to be higher than the other side, and the joint of the smoke exhaust pipeline and the smoke inlet connecting pipeline is obliquely upward.
The bottom of the smoke outlet connecting pipeline is obliquely arranged, and one side of the smoke outlet connecting pipeline, which is connected with the economizer body, is lower than the other side of the smoke outlet connecting pipeline.
Compared with the prior art, the invention has the beneficial effects that: the economizer is arranged in a smoke exhaust pipeline, a water circulation loop and a raw water preheating pipeline are arranged, the heat of exhausted high-temperature smoke is recovered, water for driving the turbine is preheated, a filter screen which is obliquely arranged is arranged in front of the economizer body, the smoke is intercepted by the filter screen before entering the economizer body, part of dust can fall into the ash collecting hopper along the oblique filter screen, most of dust on the filter screen can also fall into the ash collecting hopper when the flow rate of the smoke changes, the smoke can run for a long time without being cleaned, if the flow rate of the smoke is basically unchanged, the filter screen can also vibrate through the vibrating motor, the dust on the surface can be shaken off into the ash collecting hopper, the filter screen can also be taken out through an assembly port to be cleaned, the dust on the surface of a tube bundle of the economizer body is less in the process, and higher heat exchange efficiency is kept.
Drawings
FIG. 1 is a schematic structural diagram of a fluoroplastic steel low-temperature economizer;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic view of a heat recovery system with a fluoroplastic steel low-temperature economizer.
Reference numerals are as follows: 1. a smoke exhaust duct; 2. an economizer body; 3. a smoke inlet connecting pipeline; 4. a smoke outlet connecting pipeline; 5. filtering with a screen; 6. a vibration motor; 7. a dust collecting hopper; 8. a support spring; 81. a connecting plate; 85. a bolt; 9. a baffle plate; 10. a plate heat exchanger; 11. a circulation pump; 12. a cold and hot water tank; 13. a hot raw water tank.
Detailed Description
Embodiments of the fluoroplastic steel low-temperature economizer of the present invention are further described with reference to fig. 1 to 3.
In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present invention.
Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "a number" or "a number" means two or more unless explicitly specified otherwise.
The utility model provides a fluoroplastic steel low temperature economizer, fluoroplastic steel are structure of fluoroplastics membrane cladding nonrust steel pipe, include economizer body 2, still include into cigarette connecting tube 3 and play cigarette connecting tube 4, it is located the both sides of economizer body 2 respectively with play cigarette connecting tube 4 to advance cigarette connecting tube 3, it is provided with the filter screen 5 that the slope was arranged in 3 to advance cigarette connecting tube, filter screen 5 from top to bottom inclines to 2 directions of economizer body gradually, the bottom of advancing cigarette connecting tube 3 is provided with ash collecting bucket 7, and ash collecting bucket 7 is located filter screen 5 below.
The smoke inlet connecting pipeline 3 and the smoke outlet connecting pipeline 4 are respectively connected in the smoke exhaust pipeline 1.
As shown in fig. 1, it is a schematic diagram of the economizer body 2 installed in the heat absorption cycle system, and it includes a flue gas pipeline, a water circulation loop, and a raw water preheating pipeline.
The smoke pipeline comprises a smoke exhaust pipeline 1, and a coal economizer body 2 is arranged in the smoke exhaust pipeline 1;
the water circulation loop comprises a plate heat exchanger 10 and a circulating pump 11, and the plate heat exchanger 10, the economizer body 2 and the circulating pump 11 are connected through water pipes to form a circulation loop;
the raw water preheating pipeline comprises a cold raw water tank 12 and a hot raw water tank 13, the cold raw water tank 12 and the hot raw water tank 13 are respectively connected with the 81-type heat exchanger through water pipes, and a water pump is arranged on the water pipes to drive water to flow.
The circulating pumps 11 in this embodiment are provided with two groups, two groups of circulating pumps 11 are arranged in parallel in the water circulation loop, and one group is the standby circulating pump 11; and the circulation pump 11 is a variable frequency circulation pump 11.
Pressure sensors and temperature sensors are arranged in the smoke exhaust pipeline 1 and on the water circulation loop.
When the water circulation device is used, the water circulation loop is filled with clean water, and smoke is discharged from the smoke discharge pipeline 1 and passes through the coal economizer body 2; in the water circulation loop, a circulation pump 11 drives clean water to circulate in the water circulation loop, absorbs heat at the economizer body 2 and brings the heat to the plate heat exchanger 10; in the raw water preheating pipeline, a water pump leads water in the cold raw water tank 12 to reach the hot raw water tank 13 through the plate heat exchanger 10, absorbs the heat of the water in the water circulation loop when passing through the plate heat exchanger 10, and then heats the water in the cold raw water tank 12; the flue gas is absorbed heat after passing through the economizer body 2, so that the temperature of the discharged flue gas is reduced, and the water in the water circulation loop is recycled back to the economizer body 2 to absorb heat after the water releases heat through the plate heat exchanger 10.
As shown in fig. 1, the flue gas reaches the flue gas inlet connecting pipe 3 from the flue gas exhaust pipe 1, and the dust contained in the flue gas is intercepted by the filter screen 5, so that the flue gas reaching the economizer body 2 is cleaner, the dust falling on the tube bundle surface of the economizer body 2 is reduced, and the heat exchange efficiency of the economizer body 2 is ensured; meanwhile, the inclined filter screen 5 enables dust to fall into the dust collecting hopper 7 along the inclined direction, and particularly when the flow rate of flue gas changes, the surface of the filter screen 5 shakes to shake most of dust off, so that the filter screen 5 keeps smooth for a long time and does not need to be cleaned frequently; the dust collecting hopper 7 is cleaned only for a certain time.
The preferred cigarette connecting tube 3 that advances of this embodiment corresponds upper and lower both sides department of filter screen 5 and all is provided with supporting spring 8, and the edge connection of filter screen 5 is on supporting spring 8.
Wherein, the supporting spring 8 is preferably a compression spring, and a plurality of supporting springs are arranged on the upper and lower sides of the smoke inlet connecting pipe 3 along the transverse direction.
As shown in fig. 2, one end of the supporting spring 8 in this embodiment is connected to the inner wall of the smoke inlet duct, and the other end is provided with a connecting plate 81, and the connecting plate 81 is connected to the filter screen 5 through a bolt 85.
When the filter screen 5 is installed, the frame of the filter screen 5 and the connecting plate 81 are fixed through the bolts 85, and the installation is rapid and stable; the filter screen 5 is actually combined with the smoke inlet connecting pipeline 3 through the supporting spring 8, so that when the filter screen 5 shakes, the smoke inlet connecting pipeline 3 can be prevented from vibrating, the possibility that the filter screen 5 can shake is improved, and dust attached to the surface can smoothly shake down into the dust collecting hopper 7.
The cigarette inlet connecting pipe 3 is preferably provided with a baffle plate 9 corresponding to the front side of the supporting spring 8, and the baffle plate 9 is used for shielding the supporting spring 8 and reducing the smoke directly discharged from the supporting spring 8.
Wherein baffle 9 can adopt the concertina cloth to replace, and on one side of concertina cloth was connected into the inner wall of cigarette connecting tube, the opposite side was connected on the connecting plate, can block up the flue gas that leaks by making spring 8 completely like this.
In the embodiment, the vibration motor 6 is connected to the filter screen 5, and when there is more dust on the filter screen 5 to form a larger resistance, the vibration motor 6 can be started to actively drive the filter screen 5 to vibrate at a high frequency, so as to shake off all the dust on the surface, and the vibration motor 6 is preferably located at a higher position of the filter screen 5.
In the preferred embodiment, an assembly port is arranged on the side surface of the smoke inlet connecting pipeline 3, and is positioned on the transverse side surface of the smoke inlet connecting pipeline 3, so that the filter screen 5 is installed and disassembled at the assembly port, a cover plate is arranged at the assembly port, the assembly port is completely sealed by the cover plate in the smoke exhaust process, and the cover plate is opened when no smoke is exhausted and the filter screen 5 needs to be replaced; in addition, when the smoke exhaust is stopped, the cover plate of the assembly opening is opened, and the filter screen 5 is taken out from the smoke inlet connecting pipeline 3 and then cleaned.
In the embodiment, the bottom of the smoke inlet connecting pipeline 3 is horizontally arranged and is flush with the bottom of the economizer body 2, the top of the smoke inlet connecting pipeline 3 is obliquely arranged and is connected with one side of the economizer body 2 to be higher than the other side, and the joint of the smoke exhaust pipeline 1 and the smoke inlet connecting pipeline 3 is obliquely upward.
The bottom of the smoke outlet connecting pipe 4 is preferably arranged obliquely in the embodiment, and one side connected with the economizer body 2 is lower than the other side.
As shown in fig. 1, the flue gas flows along the direction of the arrow, which can improve the distribution uniformity of the flue gas when reaching the economizer body 2 and improve the heat exchange efficiency of the economizer.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and all technical solutions that belong to the idea of the present invention belong to the scope of the present invention. It should be noted that modifications and adaptations to those skilled in the art without departing from the principles of the present invention should also be considered as within the scope of the present invention.
Claims (5)
1. The utility model provides an energy-conserving water circulation heating system which characterized in that: comprises a flue gas pipeline, a water circulation loop and a raw water preheating pipeline; wherein the flue gas pipeline comprises a smoke exhaust pipeline, and a coal economizer is arranged in the smoke exhaust pipeline; the water circulation loop comprises a plate heat exchanger and a circulating pump, and the plate heat exchanger, the economizer body and the circulating pump are connected through water pipes to form a circulation loop; the raw water preheating pipeline comprises a cold raw water tank and a hot raw water tank, and the cold raw water tank and the hot raw water tank are respectively connected with the plate heat exchanger through water pipes;
the economizer comprises an economizer body, a smoke inlet connecting pipeline and a smoke outlet connecting pipeline, wherein the smoke inlet connecting pipeline and the smoke outlet connecting pipeline are respectively positioned at two sides of the economizer body;
the smoke inlet connecting pipeline is provided with supporting springs corresponding to the upper side and the lower side of the filter screen, and the edge of the filter screen is connected to the supporting springs;
the support spring is provided with a connecting plate, and the connecting plate is connected with the filter screen through a bolt;
the front side of the smoke inlet connecting pipeline corresponding to the supporting spring is provided with a telescopic cloth, one side of the telescopic cloth is connected to the inner wall of the smoke inlet connecting pipeline, and the other side of the telescopic cloth is connected to the connecting plate.
2. The energy-saving water circulation heating system according to claim 1, wherein: the filter screen is connected with a vibration motor.
3. The energy-saving water circulation heating system according to claim 2, wherein: and an assembly port is formed in the side surface of the smoke inlet connecting pipeline.
4. The energy-saving water circulation heating system according to claim 3, wherein: the bottom of the smoke inlet connecting pipeline is horizontally arranged and is flush with the bottom of the coal economizer body, the top of the smoke inlet connecting pipeline is obliquely arranged and is connected with one side of the coal economizer body to be higher than the other side, and the joint of the smoke exhaust pipeline and the smoke inlet connecting pipeline is obliquely upward.
5. The energy-saving water circulation heating system according to claim 4, wherein: the bottom of the smoke outlet connecting pipeline is obliquely arranged, and one side of the smoke outlet connecting pipeline, which is connected with the coal economizer body, is lower than the other side of the smoke outlet connecting pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110475086.3A CN113203087B (en) | 2021-04-29 | 2021-04-29 | Energy-saving water circulation heating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110475086.3A CN113203087B (en) | 2021-04-29 | 2021-04-29 | Energy-saving water circulation heating system |
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| Publication Number | Publication Date |
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| CN113203087A CN113203087A (en) | 2021-08-03 |
| CN113203087B true CN113203087B (en) | 2022-11-11 |
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| CN202110475086.3A Active CN113203087B (en) | 2021-04-29 | 2021-04-29 | Energy-saving water circulation heating system |
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| CN115532764A (en) * | 2022-08-01 | 2022-12-30 | 安徽丰运高分子材料有限公司 | A flue gas collection device for reclaimed rubber production |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103418195A (en) * | 2013-09-11 | 2013-12-04 | 湖南麓南脱硫脱硝科技有限公司 | Deashing and pre-dedusting device for SCR denitration system |
| CN106323058A (en) * | 2015-07-06 | 2017-01-11 | 天津华赛尔传热设备有限公司 | Heat exchange system of MGGH |
| FI126904B (en) * | 2015-12-09 | 2017-07-31 | Valmet Technologies Oy | Heater for feed water |
| CN107504476A (en) * | 2016-06-14 | 2017-12-22 | 天津华赛尔传热设备有限公司 | A kind of heat-exchange system of low-level (stack-gas) economizer |
| CN110925739B (en) * | 2019-12-04 | 2021-12-10 | 北方魏家峁煤电有限责任公司 | High-efficiency clean type economizer |
| CN211204029U (en) * | 2019-12-19 | 2020-08-07 | 江苏成华能源化工设备有限公司 | Energy-saving and environment-friendly economizer |
| CN212430823U (en) * | 2020-03-27 | 2021-01-29 | 山西国利天能科技有限公司 | Novel low-temperature economizer |
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