CN117287685A - Low NOx non-detection through-flow steam generator system with condensation function - Google Patents
Low NOx non-detection through-flow steam generator system with condensation function Download PDFInfo
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- CN117287685A CN117287685A CN202311314975.7A CN202311314975A CN117287685A CN 117287685 A CN117287685 A CN 117287685A CN 202311314975 A CN202311314975 A CN 202311314975A CN 117287685 A CN117287685 A CN 117287685A
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- water tank
- steam generator
- generator system
- temperature water
- low
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- 230000005494 condensation Effects 0.000 title claims abstract description 13
- 238000009833 condensation Methods 0.000 title claims abstract description 13
- 238000001514 detection method Methods 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 113
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000001704 evaporation Methods 0.000 claims abstract description 13
- 230000008020 evaporation Effects 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000007689 inspection Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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
- F22D1/08—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways the tubes having fins, ribs, gills, corrugations, or the like on their outer surfaces, e.g. in vertical arrangement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/26—Steam-separating arrangements
-
- 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
- F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
- F22D5/18—Controlling water feed or water level; Automatic water feeding or water-level regulators for varying the speed or delivery pressure of feed pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a low NOx non-detection tubular steam generator system with a condensation function, which comprises a water softening device, wherein the input end of the water softening device is connected with a water supply pipeline, the output end of the water softening device sequentially passes through a low-temperature water tank, a condensation heating surface and a high-temperature water tank and then enters the input end of an economizer, the output end of the economizer is divided into two paths, one path is connected to a gas-liquid separator after passing through a lower header, an evaporation heating surface and an upper header, the other path is connected to the upper header through a cooling heating surface of a combustor, a proportional control valve is arranged at the outlet of the high-temperature water tank, and the proportional control valve is connected with the high-temperature water tank through a heat exchanger arranged in the low-temperature water tank. The invention realizes that the water volume is less than 30 liters and the steam dryness is high.
Description
Technical Field
The invention belongs to the technical field of steam generation equipment, and particularly relates to a low-NOx non-detection through-flow steam generator system with a condensation function.
Background
At present, the steam generating equipment is accelerating to develop to high-efficiency low-emission full-premix condensing type, in particular to a full-premix through-flow type gas steam generator, compared with the traditional steam boiler, the steam generating speed is faster, the water volume can be smaller than 30 liters, the potential safety hazard is avoided, periodic annual inspection is not needed, the steam generating equipment is popular in the market, and the steam generating equipment is widely applied to the industries of national production and life, such as hotels, guesthouses, foods, textile, chemical industry, feed and the like.
However, the through-flow gas steam generator in the existing market has the defects of exceeding the standard of real water volume, high steam water content, large size, exceeding the standard of NOx emission and the like.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art, and provides a low NOx inspection-free through-flow type steam generator system with a condensing function, which is used for solving the technical problems of overhigh water volume, low steam dryness and excessive NOx emission of the existing steam generator, wherein the water volume is less than 30 liters, the water content of steam can be effectively reduced, and the steam dryness is improved.
The invention adopts the following technical scheme:
the low NOx non-detection through-flow steam generator system with condensation function includes water softening device, water feeding pipeline connected to the input end of the water softening device, low temperature water tank, condensation heating surface and high temperature water tank, economizer with two paths of output end connected to the gas-liquid separator, combustor cooling heat exchange surface connected to the upper header, and proportional regulating valve connected to the high temperature water tank via heat exchanger inside the low temperature water tank.
Specifically, the condensing heating surface adopts H-shaped finned tubes.
Specifically, the economizer is in the form of a finned tube.
Specifically, the inner part of the lower header is uniformly distributed with a central tube, and a plurality of small holes are formed around the central tube.
Further, the outer diameter of the central tube is smaller than the inner diameter of the lower header.
Specifically, a first water pump is arranged between the low-temperature water tank and the condensation heating surface, and a second water pump is arranged between the high-temperature water tank and the economizer.
Specifically, the evaporation heating surface is in the form of a finned tube.
Specifically, a regulating valve is arranged between the economizer and the cooling heat exchange surface of the combustor.
Specifically, folded plates are arranged in the upper header.
Further, uneven small holes are arranged at the two ends of the folded plate.
Compared with the prior art, the invention has at least the following beneficial effects:
the low NOx non-detection through-flow steam generator system with the condensation function has the advantages that the water at the outlet of the economizer is divided into two paths, and one path of water uniformly enters the lower header through the central pipe of the lower header, so that the water volume of the lower header can be reduced, and the central pipe uniformly discharges water like the lower header; the other path of the air enters the upper header after being cooled and heat exchanged by the burner, so that the flame temperature can be effectively controlled within a certain range, and the emission concentration of NOx can be reduced; the water fed into the condensing heating surface after heat exchange enters the high-temperature water tank, so that the heat efficiency of the boiler is effectively improved, the flow of the water of the heat exchanger in the low-temperature water tank can be controlled by the proportional control valve at the outlet of the high-temperature water tank, and the cavitation phenomenon can be prevented.
Furthermore, the condensing heating surface adopts an H-shaped finned tube, so that water vapor in the flue gas can be efficiently condensed.
Furthermore, the heat exchange efficiency of the economizer can be improved by adopting the finned tube, the heat exchange area is increased, the length of the heat exchange tube is reduced, and the water volume is also reduced.
Furthermore, the central tube is uniformly distributed in the lower header, and a plurality of small holes are formed around the central tube, so that water entering the lower header is uniformly distributed and then uniformly enters the evaporation heating surface, and the tube explosion of the evaporation heating surface due to overhigh local temperature is reduced.
Furthermore, the outer diameter of the central tube is smaller than the inner diameter of the lower header, and the central tube can be arranged in the lower header, so that the water space in the lower header is reduced, and the aim of reducing the water volume of the whole system is fulfilled.
Furthermore, the water volume of the inspection-free boiler can be effectively reduced by adopting the first water pump and the second water pump.
Furthermore, the evaporation heating surface adopts a fin tube form, so that the dryness of the steam entering the upper header can be improved.
Furthermore, the regulating valve can properly regulate the water quantity entering the cooling heat exchange surface of the burner according to the temperature of the hearth, so that the flame temperature is in a certain range, and the emission concentration of NOx is reduced.
Further, the uneven small holes are arranged on the two sides of the folded plate, so that the folded plates on the two sides in saturated steam enter the gas-liquid separator, a large amount of small holes densely arranged on the upper parts of the folded plates in the gas flow out, and water flows out from small holes sparsely arranged on the bottoms of the folded plates, so that fluctuation of the liquid level in the upper header can be prevented.
In conclusion, the invention can realize the advantages of exceeding the real water volume, high steam dryness, small size, standard NOx emission and the like.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a schematic diagram of a system according to the present invention;
fig. 2 is a schematic view of the structure of the folded plate of the present invention.
Wherein: 1. a water softening device; 2. a heat exchanger; 3. a low temperature water tank; 4. a first water pump; 5. condensing the heating surface; 6. a high temperature water tank; 7. a proportional control valve; 8. a second water pump; 9. an economizer; 10. a regulating valve; 11. the cooling heat exchange surface of the burner; 12. a central tube; 13. a lower header; 14. evaporating the heating surface; 15. a header is arranged; 16. a folded plate; 17. a gas-liquid separator.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", 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 devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Various structural schematic diagrams according to the disclosed embodiments of the present invention are shown in the accompanying drawings. The figures are not drawn to scale, wherein certain details are exaggerated for clarity of presentation and may have been omitted. The shapes of the various regions, layers and their relative sizes, positional relationships shown in the drawings are merely exemplary, may in practice deviate due to manufacturing tolerances or technical limitations, and one skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions as actually required.
Referring to fig. 1, the invention provides a low NOx inspection-free through-flow steam generator system with a condensing function, which comprises a water softening device 1, a low-temperature water tank 3, a condensing heating surface 5, a high-temperature water tank 6, an economizer 9, a lower header 13, an upper header 15 and a gas-liquid separator 17.
The input end of the water softening device 1 is connected with a water supply pipeline, the output end enters the economizer 9 after passing through the low-temperature water tank 3, the first water pump 4, the condensation heating surface 5, the high-temperature water tank 6, the proportional control valve 7 and the second water pump 8, the outlet of the economizer 9 is divided into two paths, one path is connected to the gas-liquid separator 17 after passing through the lower header 13, the evaporation heating surface 14 and the upper header 15, and the other path is connected to the upper header 15 after passing through the control valve 10 and the burner cooling heat exchange surface 11.
Wherein, be provided with heat exchanger 2 in the low temperature water tank 3, the import of heat exchanger 2 is connected with the export of a way of high temperature water tank 6, can reduce the temperature of high temperature water tank 6, prevents that cavitation from appearing in second water pump 8, and the export of heat exchanger 2 and the export of another way of high temperature water tank 6 are connected with the second water pump through proportional control valve 7. The proportional control valve 7 is arranged at the outlet of the other end of the high-temperature water tank 6 and the outlet of the heat exchange outlet 2.
The high-temperature water tank 3 and the low-temperature water tank 6 are both normal-pressure water tanks, and an overflow port of the high-temperature water tank 3 is connected with the low-temperature water tank.
The proportional control valve 7 at the outlet of the high-temperature water tank 6 can control the flow rate of the water of the heat exchanger 2 in the low-temperature water tank 3.
The condensing heating surface 5 adopts H-shaped finned tubes, so that water vapor in the flue gas can be efficiently condensed.
The economizer 9 adopts a fin tube form, increases the heat exchange coefficient, and then reduces the water volume.
The regulating valve 10 can properly regulate the water quantity entering the cooling heat exchange surface 11 of the burner according to the temperature of the hearth, so that the flame temperature is in a certain range, and the emission concentration of NOx is reduced.
The central tube 12 is uniformly distributed in the lower header 13, a plurality of small holes are formed around the central tube 12, and the outer diameter of the central tube 12 is smaller than the inner diameter of the lower header 13, so that the water volume of the lower header 13 can be reduced, and the central tube 12 uniformly discharges water like the lower header 13.
The evaporation heating surface 14 adopts a fin tube form, and the dryness of the evaporation heating surface entering the upper header 15 is improved.
A gas-liquid separator 17 and a folded plate 16 are arranged in the upper drum.
The gas-liquid separator is arranged in the upper drum and is provided with a plurality of layers of separating devices, so that the gas-liquid can be separated efficiently.
Please refer to fig. 2, please make additional explanation for the contents of fig. 2. Fig. 2 shows a folded plate 16, which is arranged in the upper drum, and uneven small holes are arranged on two sides of the folded plate 6, wherein the upper small holes have high dense steam flow and the lower small holes have Kong Xishu water flow, so that steam and water stably pass through the folded plate to prevent the fluctuation of the liquid level in the upper drum.
The invention relates to a low NOx non-detection through-flow steam generator system with condensing function, which comprises the following specific working processes:
the water supply enters a low-temperature water tank 3 after being treated by a water softening device 1, and enters a condensation heating surface 5 for heat exchange by a first water pump 4; the water after heat exchange enters a high-temperature water tank 6 and enters an economizer 9 through a second water pump 8; the water at the outlet of the economizer 9 is divided into two paths, one path enters the lower header 13 through the central pipe 12, the lower header 13 generates saturated steam through the evaporation heating surface 14 and enters the upper header 15, and the saturated steam is supplied to users after being subjected to steam-water separation through the gas-liquid separator 17; the other path enters the upper header 15 after heat exchange through the cooling heat exchange surface 11 of the burner.
When the temperature of the high-temperature water tank 6 is higher than the set value of 100 ℃, the proportional control valve 7 at the outlet of the high-temperature water tank 6 controls the flow of the water of the heat exchanger 2 in the low-temperature water tank 3, so that the water temperature entering the second water pump 8 is within less than 70 ℃, and the cavitation phenomenon of the second water pump 8 is prevented.
The regulating valve 10 is appropriately regulated according to the temperature of the furnace so that the flame temperature is within 800-1000 c, reducing the emission concentration of NOx.
The evaporation heating surface, the coal economizer and the condensation heating surface of the system all adopt high-efficiency finned tube heat exchangers, so that the heat exchange efficiency is improved, the heat exchange area is increased, the length of a heat exchange tube is reduced, the water volume is also reduced, a central tube is adopted in a lower header, the volume can be further controlled to be within 30L, and meanwhile, a folded plate for stabilizing the liquid level of the upper barrel and a high-efficiency gas-liquid separator with a multi-layer separation device are arranged in the upper barrel, so that the dryness of steam is improved.
In summary, the low NOx non-detection through-flow steam generator system with the condensing function realizes that the water volume is less than 30 liters and the steam dryness is high.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a take low NOx of condensation function to exempt from to examine through-flow steam generator system, a serial communication port, including water softener (1), water softener (1) input connection feed line, water softener (1) output is through low temperature water tank (3), condensate heating face (5) and high temperature water tank (6) back entering economizer (9) input in proper order, economizer (9) output divides two-way, connect to gas-liquid separator (17) after lower header (13), evaporation heating face (14) and upper header (15) one way, the other way is connected to upper header (15) through combustor cooling heat exchange face (11), the exit of high temperature water tank (6) is provided with proportional control valve (7), proportional control valve (7) are connected with high temperature water tank (6) through heat exchanger (2) that set up in low temperature water tank (3).
2. The low NOx inspection free through flow steam generator system with condensing function according to claim 1, characterized by the fact that the condensing heating surface (5) is an H-type finned tube.
3. The low NOx inspection free through flow steam generator system with condensing function according to claim 1, characterized by the fact that the economizer (9) takes the form of finned tubes.
4. The low NOx inspection-free through-flow steam generator system with condensing function according to claim 1, characterized in that the inside of the lower header (13) is uniformly distributed with a central tube (12), and the periphery of the central tube (12) is provided with a plurality of small holes.
5. The low NOx inspection free through flow steam generator system with condensing functionality of claim 4, characterized by the fact that the outside diameter of the center tube (12) is smaller than the inside diameter of the lower header (13).
6. The low-NOx non-detection through-flow steam generator system with the condensing function according to claim 1, characterized in that a first water pump (4) is arranged between the low-temperature water tank (3) and the condensing heating surface (5), and a second water pump (8) is arranged between the high-temperature water tank (6) and the economizer (9).
7. The low NOx inspection free through flow steam generator system with condensing functionality of claim 1, characterized by the fact that the evaporation heating surface (14) takes the form of finned tubes.
8. The low NOx inspection free through flow steam generator system with condensing function according to claim 1, characterized by the fact that a regulating valve (10) is arranged between the economizer (9) and the burner cooling heat exchange surface (11).
9. The low NOx inspection free through flow steam generator system with condensing functionality according to claim 1, characterized by the fact that flaps (16) are arranged in the upper header (15).
10. The low NOx inspection free through flow steam generator system with condensing functionality of claim 9, characterized by non-uniform apertures disposed on both sides of the flap (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311314975.7A CN117287685A (en) | 2023-10-11 | 2023-10-11 | Low NOx non-detection through-flow steam generator system with condensation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311314975.7A CN117287685A (en) | 2023-10-11 | 2023-10-11 | Low NOx non-detection through-flow steam generator system with condensation function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117287685A true CN117287685A (en) | 2023-12-26 |
Family
ID=89238826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311314975.7A Pending CN117287685A (en) | 2023-10-11 | 2023-10-11 | Low NOx non-detection through-flow steam generator system with condensation function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117287685A (en) |
-
2023
- 2023-10-11 CN CN202311314975.7A patent/CN117287685A/en active Pending
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