CN113587079A - Industrial boiler water circulation method and device - Google Patents
Industrial boiler water circulation method and device Download PDFInfo
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- CN113587079A CN113587079A CN202110830788.9A CN202110830788A CN113587079A CN 113587079 A CN113587079 A CN 113587079A CN 202110830788 A CN202110830788 A CN 202110830788A CN 113587079 A CN113587079 A CN 113587079A
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- heat
- energy saver
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000008234 soft water Substances 0.000 claims abstract description 66
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000003546 flue gas Substances 0.000 claims abstract description 47
- 239000010865 sewage Substances 0.000 claims abstract description 30
- 239000007789 gas Substances 0.000 claims abstract description 22
- 238000004321 preservation Methods 0.000 claims abstract description 22
- 239000000779 smoke Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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Classifications
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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
- F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
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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
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
-
- 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
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
-
- 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)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses a water circulation method and a device for an industrial boiler, which comprises a soft water pipeline, a sewage pipeline and a flue gas pipeline; the soft water pipeline means that soft water passes through the continuous heat exchanger, the secondary energy saver, the boiler heat-preservation water tank, the deaerator and the primary energy saver in sequence from the boiler soft water tank and then reaches the inside of the industrial boiler; the sewage pipeline is that sewage enters the continuous discharge heat exchanger from the industrial boiler and then is discharged into the trench, and the sewage can heat soft water for the first time in the continuous discharge heat exchanger; the flue gas pipeline is used for discharging tail flue gas of the industrial boiler from the industrial boiler to the primary energy saver and the secondary energy saver in sequence and then through a chimney; in the secondary economizer, the tail flue gas can heat the soft water for the second time; in the first-stage economizer, the tail flue gas can heat the soft water for the third time; this technical scheme makes the exhaust gas temperature of boiler further reduce to and the energy efficiency of boiler further improves.
Description
Technical Field
The invention relates to the field of energy conservation of heating equipment, in particular to a water circulation method and a water circulation device for an industrial boiler.
Background
As oil and gas fired boilers have gained wider and wider use in industry. Particularly, in the tobacco industry, most industrial enterprises adopt oil-gas fired boilers, but due to some defects of early design and insufficient energy-saving consciousness of the enterprises, the actual operating efficiency of most oil-gas fired boilers is below 90%, and at present, the efficiency of the oil-gas fired boilers is improved to about 95% abroad by various technical means.
The heat loss mode of the boiler mainly comprises the heat lost by insufficient combustion of fuel, the heat lost by pollution discharge of the boiler, the heat lost by smoke exhaust, heat radiation of a boiler body and the like; wherein, the estimated incomplete combustion heat loss is about 1%, the pollution discharge heat loss is about 1%, the smoke discharge heat loss is about 8-16%, and the heat dissipation of the furnace body is 1-2%; it follows that the specific gravity is the highest for smoke heat loss.
Therefore, reducing the exhaust gas temperature of the boiler is the most direct and effective measure for reducing the energy consumption of the boiler.
At present, the common method is to add an energy saver in the water circulation process of an industrial boiler so as to recycle the heat of exhaust smoke and further reduce the energy consumption of the boiler; for example, chinese patent publication No. CN205561586U discloses a boiler economizer system, which can introduce flue gas discharged from a boiler and water flowing out of a soft water tank into a boiler economizer respectively, and allow heat transfer between the flue gas and the water, so that the flue gas directly preheats the water in the soft water tank, the water heated in the soft water tank enters the boiler again for secondary heating, and the boiler economizer and the soft water tank are connected to form a circulation, so that the water in the soft water tank circulates and sufficiently absorbs heat of the flue gas discharged from the boiler; this patent not only can greatly reduced boiler exhaust gas's temperature promptly, reduces the heat loss extravagant, but also can preheat water, realizes energy reuse.
But the exhaust gas temperature of the boiler can be further reduced, and the energy efficiency of the boiler can be further improved.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a water circulation method and apparatus for an industrial boiler, so that the exhaust gas temperature of the boiler is further lowered and the energy efficiency of the boiler is further improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
an industrial boiler water circulation method comprises a soft water pipeline, a sewage pipeline and a flue gas pipeline;
the soft water pipeline means that soft water passes through the continuous heat exchanger, the secondary energy saver, the boiler heat-preservation water tank, the deaerator and the primary energy saver in sequence from the boiler soft water tank and then reaches the inside of the industrial boiler;
the sewage pipeline is that sewage enters the continuous discharge heat exchanger from the industrial boiler and then is discharged into the trench, and the sewage can heat soft water for the first time in the continuous discharge heat exchanger;
the flue gas pipeline is used for discharging tail flue gas of the industrial boiler from the industrial boiler to the primary energy saver and the secondary energy saver in sequence and then through a chimney; in the secondary economizer, the tail flue gas can heat the soft water for the second time; in the one-level economizer, the tail flue gas can carry out the heating to the soft water for the third time.
Preferably, the water outlet of the boiler soft water tank is connected with the water inlet of the row heat exchanger, the water outlet of the row heat exchanger is connected with the water inlet of the secondary energy saver, the water outlet of the secondary energy saver is connected with the water inlet of the boiler heat preservation water tank, the water outlet of the boiler heat preservation water tank is connected with the water inlet of the deaerator, the water outlet of the deaerator is connected with the water inlet of the primary energy saver, the water outlet of the primary energy saver is connected with the water inlet of the boiler, the sewage water outlet of the industrial boiler is connected with the sewage water inlet of the row heat exchanger, and the sewage water outlet of the row heat exchanger is communicated with a trench;
the gas outlet of the industrial boiler is connected with the gas inlet of the first-stage energy saver, the gas outlet of the first-stage energy saver is connected with the gas inlet of the second-stage energy saver, and the gas outlet of the second-stage energy saver is communicated with the chimney.
Preferably, the boiler is further provided with a return pipeline, the water inlet end of the return pipeline is communicated with a soft water pipeline between the secondary economizer and the boiler heat-preservation water tank, and the water outlet end of the return pipeline is communicated with the boiler soft water tank.
Preferably, the return pipeline is further provided with an electric valve, the boiler heat-preservation water tank is further provided with a liquid level sensor, and when the liquid level sensor detects that the water level in the boiler heat-preservation water tank is lower than a set value, the liquid level sensor sends a signal to open the electric valve.
Preferably, the secondary energy saver comprises a heat exchange channel, a heat exchanger electric baffle, a flue gas channel, a flue electric baffle and a coiled pipe, wherein two ends of the coiled pipe are respectively connected with a water outlet of the row heat exchanger and a water inlet of the boiler heat preservation water tank, the heat exchanger electric baffle is positioned at a gas inlet of the heat exchange channel, the flue electric baffle is positioned at a gas inlet of the flue gas channel, and when the heat exchanger electric baffle is opened and the flue electric baffle is closed, flue gas can enter the heat exchange channel and exchange heat with soft water in the coiled pipe; when the electric baffle of the heat exchanger is closed and the electric baffle of the flue is opened, the flue gas can enter the flue gas channel and is directly discharged to the chimney.
Preferably, the coiled pipe is further provided with a temperature sensor, and when the temperature sensor detects that the temperature of the soft water in the coiled pipe exceeds a set value, the temperature sensor sends a signal to close the electric baffle of the heat exchanger and open the electric baffle of the flue.
An industrial boiler water circulation device adopts the industrial boiler water circulation method.
The invention has the beneficial effects that:
1) the boiler soft water can be heated in the primary energy economizer and the secondary energy economizer by using the flue gas at the tail part of the industrial boiler, so that the flue gas temperature is reduced, and the efficiency of the industrial boiler is improved.
2) The continuous-discharge heat exchanger can heat water for the boiler by utilizing continuous sewage discharged by the industrial boiler, fully utilizes the heat of waste water, improves the soft water temperature of the industrial boiler and improves the efficiency of the industrial boiler.
3) When the industrial boiler load reduces and leads to holding water box inflow to reduce, the heat of row heat exchanger and second grade energy-saving appliance can not fully be absorbed by the soft water, sets up the return line back between second grade energy-saving appliance and holding water box, through the continuous circulation of return line water, locates continuous heat transfer at row heat exchanger and second grade energy-saving appliance, further improves industrial boiler soft water temperature, improves industrial boiler efficiency.
4) The secondary energy saver is designed to be integrated in the flue, can automatically switch flue gas passing modes according to actual conditions on site, and controls the flue gas to pass through the secondary energy saver or directly cross the secondary energy saver to be discharged into a chimney.
Drawings
FIG. 1 is a schematic diagram of an industrial boiler water cycle of the present invention;
fig. 2 is a schematic diagram of the two-stage economizer of the present invention.
Wherein, 1, a boiler soft water tank; 2. a continuous heat exchanger; 3. a secondary energy saver; 5. a boiler heat preservation water tank; 7. a deaerator; 8. a primary economizer; 9. an industrial boiler; 4. an electrically operated valve; 6. a liquid level sensor; 30. a heat exchange channel; 31. an electric baffle of the heat exchanger; 32. a flue gas channel; 33. a flue electric baffle; 34. a serpentine tube.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The first embodiment is as follows:
an industrial boiler water circulation device comprises a boiler softened water tank 1, a row heat exchanger 2, a secondary energy saver 3, a boiler heat preservation water tank 5, a deaerator 7, a primary energy saver 8 and an industrial boiler 9, the water outlet of the boiler soft water tank 1 is connected with the water inlet of the row heat exchanger 2, the water outlet of the row heat exchanger 2 is connected with the water inlet of the secondary energy saver 3, the water outlet of the secondary energy saver 3 is connected with the water inlet of the boiler heat preservation water tank 5, the water outlet of the boiler heat preservation water tank 5 is connected with the water inlet of the deaerator 7, the water outlet of the deaerator 7 is connected with the water inlet of the primary energy saver 8, the water outlet of the primary energy saver 8 is connected with the water inlet of the boiler, a sewage outlet of the industrial boiler 9 is connected with a sewage inlet of the continuous heat exchanger 2, and a sewage outlet of the continuous heat exchanger 2 is communicated with a trench;
an air outlet of the industrial boiler 9 is connected with an air inlet of a first-stage energy saver 8, an air outlet of the first-stage energy saver 8 is connected with an air inlet of a second-stage energy saver 3, and an air outlet of the second-stage energy saver 3 is communicated with a chimney.
Thus, the industrial boiler water circulation device comprises a soft water pipeline, a sewage pipeline and a smoke pipeline; wherein; the sewage pipeline means that sewage enters the continuous discharge heat exchanger 2 from the industrial boiler 9 and then is discharged into the trench, and the sewage can heat soft water for the first time in the continuous discharge heat exchanger 2; therefore, the heat of the waste water is fully utilized, the soft water temperature of the boiler is improved, and the boiler efficiency is further improved.
The flue gas pipeline refers to that the tail flue gas of the industrial boiler 9 sequentially enters the primary energy saver 8 and the secondary energy saver 3 from the industrial boiler 9 and is finally discharged through a chimney; in the secondary economizer 3, the tail flue gas can heat the soft water for the second time; in the first-stage economizer 8, the tail flue gas can heat the soft water for the third time; thus, the exhaust gas temperature is reduced, and the boiler efficiency is improved.
The soft water pipeline means that soft water passes through the continuous heat exchanger 2, the secondary energy saver 3, the boiler heat-preservation water tank 5, the deaerator 7 and the primary energy saver 8 in sequence from the boiler soft water tank 1 and then reaches the industrial boiler 9; compared with the original industrial boiler water circulation device with only one economizer, the temperature of the discharged smoke can be reduced from 105 ℃ to 85 ℃, and the thermal efficiency of the industrial boiler 9 is improved from 92% to 94%; the efficiency is improved by 2 percent by 1500 ten thousand per year of natural gas cost, and the natural gas cost saved per year is about 30 ten thousand.
In this embodiment, a return line is further provided, a water inlet end of the return line is communicated with a soft water pipeline between the secondary economizer 3 and the boiler heat-preservation water tank 5, and a water outlet end of the return line is communicated with the boiler soft water tank 1; like this, when boiler load reduces and leads to holding water box inflow to reduce, the heat of even heat exchanger 2 and second grade energy-saving appliance 3 can not fully be absorbed by the soft water, sets up the return line after between second grade energy-saving appliance 3 and boiler holding water box 5, through the continuous circulation of return line water, locates continuous heat transfer at even heat exchanger 2 and second grade energy-saving appliance 3, further improves boiler soft water temperature, improves boiler efficiency.
Further preferably, an electric valve 4 is further arranged on the return pipeline, a liquid level sensor 6 is further arranged on the boiler heat preservation water tank 5, and when the liquid level sensor 6 detects that the water level in the boiler heat preservation water tank 5 is lower than a set value, the liquid level sensor 6 sends a signal to open the electric valve 4.
In this embodiment, the secondary economizer 3 includes a heat exchange channel 30, a heat exchanger electric baffle 31, a flue gas channel 32, a flue electric baffle 33 and a coiled pipe 34, two ends of the coiled pipe 34 are respectively connected with a water outlet of the continuous heat exchanger 2 and a water inlet of the boiler heat-preservation water tank 5, the heat exchanger electric baffle 31 is located at an air inlet of the heat exchange channel 30, the flue electric baffle 33 is located at an air inlet of the flue gas channel 32, and when the heat exchanger electric baffle 31 is opened and the flue electric baffle 33 is closed, flue gas can enter the heat exchange channel 30 and exchange heat with soft water in the coiled pipe 34; when the heat exchanger electric damper 31 is closed and the flue electric damper 33 is opened, the flue gas can enter the flue gas channel 32 and be directly discharged to the chimney.
So set up because in soft water circulation process, just can lead to soft water to be detained in the heat exchanger very easily if water pump or pipeline go wrong, and then the phenomenon that the soft water is heated the vaporization in coiled pipe 34 appears, leads to the pressure rise in second grade economizer 3, then causes the incident.
Further preferably, a temperature sensor is further arranged on the coiled pipe 34, and when the temperature sensor detects that the temperature of the soft water in the coiled pipe 34 exceeds a set value, the temperature sensor sends a signal to close the heat exchanger electric baffle 31 and open the flue electric baffle 33.
An industrial boiler water circulation method comprises a soft water pipeline, a sewage pipeline and a flue gas pipeline;
the soft water pipeline means that soft water passes through the continuous heat exchanger 2, the secondary energy saver 3, the boiler heat-preservation water tank 5, the deaerator 7 and the primary energy saver 8 in sequence from the boiler soft water tank 1 and then reaches the industrial boiler 9;
the sewage pipeline is that sewage enters the continuous discharge heat exchanger 2 from the industrial boiler 9 and then is discharged into the trench, and the sewage can heat soft water for the first time in the continuous discharge heat exchanger 2;
the flue gas pipeline is used for discharging tail flue gas of the industrial boiler 9 from the industrial boiler 9 to the primary energy saver 8 and the secondary energy saver 3 in sequence and then through a chimney; in the secondary economizer 3, the tail flue gas can heat the soft water for the second time; in the first-stage economizer 8, the tail flue gas can heat the soft water for the third time.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A water circulation method of an industrial boiler is characterized in that; comprises a soft water pipeline, a sewage pipeline and a smoke pipeline;
the soft water pipeline means that soft water sequentially passes through the row-connected heat exchanger (2), the secondary energy saver (3), the boiler heat preservation water tank (5), the deaerator (7) and the primary energy saver (8) from the boiler soft water tank (1) and then reaches the industrial boiler (9);
the sewage pipeline is that sewage enters the continuous discharge heat exchanger (2) from the industrial boiler (9) and then is discharged into the trench, and the sewage can heat soft water for the first time in the continuous discharge heat exchanger (2);
the flue gas pipeline is characterized in that the flue gas at the tail part of the industrial boiler (9) sequentially enters the primary energy saver (8) and the secondary energy saver (3) from the industrial boiler (9) and is finally discharged through a chimney; in the secondary economizer (3), the tail flue gas can heat the soft water for the second time; in the first-stage economizer (8), the tail flue gas can heat the soft water for the third time.
2. An industrial boiler water circulation method in accordance with claim 1, characterized in that the water outlet of the boiler soft water tank (1) is connected with the water inlet of the row heat exchanger (2), the water outlet of the row heat exchanger (2) is connected with the water inlet of the secondary energy saver (3), the water outlet of the secondary energy saver (3) is connected with the water inlet of the boiler heat-preservation water tank (5), the water outlet of the boiler heat-preservation water tank (5) is connected with the water inlet of the deaerator (7), the water outlet of the deaerator (7) is connected with the water inlet of the primary energy saver (8), the water outlet of the primary economizer (8) is connected with the water inlet of the boiler, the sewage outlet of the industrial boiler (9) is connected with the sewage inlet of the continuous heat exchanger (2), and the sewage outlet of the continuous heat exchanger (2) is communicated with a trench;
the gas outlet of the industrial boiler (9) is connected with the gas inlet of the first-stage energy saver (8), the gas outlet of the first-stage energy saver (8) is connected with the gas inlet of the second-stage energy saver (3), and the gas outlet of the second-stage energy saver (3) is communicated with the chimney.
3. An industrial boiler water circulation method according to claim 1, characterized in that a return line is provided, the inlet end of which communicates with the soft water line between the secondary economizer (3) and the boiler holding water tank (5), and the outlet end of which communicates with the boiler soft water tank (1).
4. A method for water circulation in industrial boilers, according to claim 3, characterized in that there is also an electric valve (4) on the return line, and a level sensor (6) on the boiler holding water tank (5), and when the level sensor (6) detects that the water level in the boiler holding water tank (5) is lower than a set value, the level sensor (6) sends a signal to open the electric valve (4).
5. The industrial boiler water circulation method according to the claim 1, characterized in that the secondary economizer (3) comprises a heat exchange channel (30), a heat exchanger electric baffle (31), a flue gas channel (32), a flue electric baffle (33) and a serpentine pipe (34), wherein two ends of the serpentine pipe (34) are respectively connected with a water outlet of the row heat exchanger (2) and a water inlet of the boiler heat preservation water tank (5), the heat exchanger electric baffle (31) is positioned at an air inlet of the heat exchange channel (30), the flue electric baffle (33) is positioned at an air inlet of the flue gas channel (32), and when the heat exchanger electric baffle (31) is opened and the flue electric baffle (33) is closed, flue gas can enter the heat exchange channel (30) and exchange heat with soft water in the serpentine pipe (34); when the heat exchanger electric baffle (31) is closed and the flue electric baffle (33) is opened, the flue gas can enter the flue gas channel (32) and is directly discharged to a chimney.
6. An industrial boiler water circulation method according to claim 5, characterized in that the serpentine pipe (34) is further provided with a temperature sensor, and when the temperature sensor detects that the temperature of the soft water in the serpentine pipe (34) exceeds a set value, the temperature sensor sends out a signal to close the heat exchanger electric shutter (31) and open the flue electric shutter (33).
7. An industrial boiler water circulation apparatus, characterized in that the industrial boiler water circulation method according to any one of claims 1-6 is employed.
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| CN202110830788.9A CN113587079A (en) | 2021-07-22 | 2021-07-22 | Industrial boiler water circulation method and device |
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2021
- 2021-07-22 CN CN202110830788.9A patent/CN113587079A/en active Pending
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