CN111853758B - Boiler system for waste heat steam heat storage utilization and operation method thereof - Google Patents
Boiler system for waste heat steam heat storage utilization and operation method thereof Download PDFInfo
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- CN111853758B CN111853758B CN202010844401.0A CN202010844401A CN111853758B CN 111853758 B CN111853758 B CN 111853758B CN 202010844401 A CN202010844401 A CN 202010844401A CN 111853758 B CN111853758 B CN 111853758B
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- 238000005338 heat storage Methods 0.000 title claims abstract description 59
- 239000002918 waste heat Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 266
- 239000002699 waste material Substances 0.000 claims abstract description 17
- 239000011449 brick Substances 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000011084 recovery Methods 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 2
- 238000010992 reflux Methods 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 description 7
- 238000007792 addition Methods 0.000 description 6
- 239000000356 contaminant Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000013049 sediment Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
-
- 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
- F22D1/24—Feed-water heaters, i.e. economisers or like preheaters with fire tubes or flue ways traversing feed-water vessels
-
- 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
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention provides a boiler system for waste heat steam heat storage utilization and an operation method thereof, which comprise a boiler body, an economizer, a condenser, a heat storage heat exchange tank, a condensate tank and a deoxidization water tank, wherein the heat storage heat exchange tank is connected with the economizer through a boiler water supply pipeline, an upper hot water area and a lower cold water area are divided into the condensate tank, a float water intake device is arranged in the upper part of the upper hot water area, a fin tube heat exchanger is arranged in the condensate tank, a waste steam heat exchange tube extends into the heat storage heat exchange tank, the steam outlet end of the waste steam heat exchange tube is connected with the fin tube heat exchanger, the float water intake device is connected with the heat storage heat exchange tank through a high-temperature water supply pipeline, the high-temperature water supply pipeline is connected with a boiler water supply pump in series, the deoxidization water tank is also connected with the high-temperature water supply pipeline in series, the lower cold water area of the condensate tank is connected with the condenser through a low-temperature water supply pipeline, the low-temperature water supply pipeline is connected with the condensate pump in series, and the condenser is connected with the upper hot water area through a warm water return pipeline.
Description
Technical Field
The invention belongs to the technical field of machinery, and relates to a boiler, in particular to a boiler system for heat storage and utilization of waste heat steam and an operation method thereof.
Background
In the process of manufacturing the aerated bricks in the building material industry, a large amount of low-pressure unsaturated waste heat steam is regularly generated, and the part of the waste heat steam is usually utilized in a boiler water supply tank to heat boiler water supply, but because the part of heat is greatly more than the heating allowance of the boiler supplementary water supply, most of the boiler water supply can only be heated to reach a boiling state at most.
Therefore, part of the water pump of the boiler generates cavitation phenomenon due to the temperature rise, so that the boiler can not normally operate; on the other hand, the water supply temperature of the boiler with the condenser is ultrahigh, the condensation recovery effect cannot be achieved, the exhaust gas temperature of the boiler is increased, and the thermal efficiency of the boiler is reduced.
Disclosure of Invention
The invention aims at solving the problems in the prior art, and provides a boiler system for carrying out countercurrent heat exchange in a heat storage heat exchange tank by utilizing waste heat steam and boiler feed water (deoxidized water), so that the heating temperature exceeds the temperature which can be raised under the normal pressure state, and the waste heat steam is used for periodically supplying steam, and the waste heat steam heat storage utilization of heat storage is carried out through the volume of the heat storage heat exchange tank, and an operation method thereof.
The aim of the invention can be achieved by the following technical scheme: the utility model provides a boiler system that waste heat steam heat accumulation utilized, includes the boiler body, set up the energy-saving appliance on the boiler body, energy-saving appliance afterbody connection condenser still includes heat accumulation heat transfer pot, condensate tank and deoxidization water tank, the boiler body passes through the pipe connection with the energy-saving appliance, heat accumulation heat transfer pot passes through boiler supply line with the energy-saving appliance and is connected, set up the float water intaking ware in the upper portion of upper hot water district in the condensate tank, the middle part of condensate tank still sets up the finned tube heat exchanger, stretch into the waste steam heat exchange tube in the heat accumulation heat transfer pot, the inlet steam head end of waste steam heat exchange tube is input and is heated brick waste heat steam, the steam end connection of waste steam heat exchange tube the finned tube heat exchanger, the float water intaking ware with the heat accumulation heat transfer pot passes through high temperature supply line connection, the boiler pump is established ties on the high temperature supply line, the high temperature supply line still establishes ties the deoxidization water tank, the high temperature supply line between condensate tank and the deoxidization water tank still establishes ties the water pump, the lower floor of condensate tank passes through the low temperature water supply line and condensate tank and water supply line.
In the boiler system for utilizing the waste heat steam for heat accumulation, a float water taking principle and a high-low temperature layering measure of the condensate water tank are adopted, so that the water temperature at the bottom of the condensate water tank is lower, and the system utilizes the characteristic that a part of condenser heating surfaces are arranged at the tail part of the boiler, so that the exhaust smoke temperature of the boiler is further reduced, and the comprehensive heat efficiency of the boiler is improved. And the steam condensate isolated from the heat storage and exchange tank has a certain temperature, the condensate water is used for continuously heating the condensate water tank, and finally the steam condensate water after heat exchange is discharged into a condensate water recovery tank for centralized utilization.
In the boiler system for heat storage and utilization of waste heat steam, the water vapor heat exchange air preheater is further arranged on the boiler body, and the water vapor heat exchange air preheater is connected in series on the boiler water supply pipeline.
In the boiler system for heat storage and utilization of waste heat steam, the steam outlet of the boiler body is connected with the sub-cylinder through the steam delivery pipe.
In the boiler system for heat storage and utilization of waste heat steam, the steam dividing cylinder is connected with the deoxidizing water tank through a steam pipe. The waste heat of the system is utilized, and the consumption of steam can be greatly reduced.
In the boiler system for heat storage and utilization of waste heat steam, the boiler body adopts a conventional boiler or a condensing boiler.
In the boiler system for heat storage and utilization of waste heat steam, the bottom of the finned tube heat exchanger is connected with a condensed water discharge tube, and the tail end of the condensed water discharge tube is connected with a condensed water recovery tank. Because of the large amount of sediment and contaminants in the waste heat steam of the brick industry, this portion of the condensate is typically utilized elsewhere in the normal system, such as by the addition of the stirring water required for the brick making powder.
The operation method of the boiler system for heat storage and utilization of waste heat steam comprises the following steps:
1) Firstly, pumping low-temperature water in a lower-layer cold water area in a condensing water tank into a condenser by a condensing water pump, and refluxing high-temperature water formed by heat exchange of the low-temperature water in the condenser to an upper-layer hot water area in the condensing water tank, so that the water temperature of the upper-layer hot water area is always kept at a higher temperature;
2) Then, the float water taking device is utilized to pump the high-temperature water in the upper layer hot water area into the deoxidizing water tank through the deoxidizing water pump so as to reduce the steam consumption of the deoxidizing device;
3) The deoxidized water from the deoxidized water tank is pumped into a heat storage heat exchange tank through a boiler feed pump to be heated by waste heat steam of the steam adding bricks, and then high-temperature water from the heat storage heat exchange tank flows through a steam heat exchange air preheater to heat combustion air and improve the enthalpy value of the air; and then the waste heat steam of the steam adding brick enters the finned tube heat exchanger to continuously heat the high-temperature water in the upper-layer hot water area;
4) And then the cooled deoxidized water enters the energy saver, further heats and enters the boiler body, and the boiler body generates steam and then is conveyed to the split cylinders, so that the steam is distributed to each steam utilization point for use, and the heating cycle of the system is completed.
In the operation method of the boiler system for heat storage and utilization of waste heat steam, in the step 4), deoxygenated water entering the energy saver also flows through the water vapor heat exchange air preheater, so that the heat exchange working condition of the energy saver is further improved.
Compared with the prior art, the boiler system for heat storage and utilization of waste heat steam and the operation method thereof have the following advantages:
The system utilizes waste heat steam and deoxidized water to carry out countercurrent heat exchange in the heat storage heat exchange tank, so that heat brought by the waste heat steam of the aerated brick can be stored in the heat storage heat exchange tank, the heating temperature exceeds the temperature which cannot be achieved by a common normal pressure water tank, the deoxidized water basically can reach more than 120 ℃, the temperature of air for combustion can be heated to a proper range by utilizing the temperature, the deoxidized water after cooling can keep a larger temperature difference in heat exchange of an energy saver, the temperature and pressure values of the flue gas side and the water side of the energy saver are increased, and the outlet flue gas temperature is reduced; the deoxidized water with a certain heat storage volume can be uniformly used for distributing the water supply amount of the boiler at each moment, so that the water supply temperature of the boiler is always kept at a higher temperature, the comprehensive heat efficiency of the boiler is improved, and the fuel consumption is reduced.
On the one hand, the heat storage and heat exchange tank can quickly absorb waste heat steam of the reaction kettle in a short time, and on the other hand, as the heat storage and heat exchange tank is arranged at the outlet of the boiler feed water pump, the increase of the heat storage temperature can not cause the boiler feed water pump to be inoperable any more, the temperature of the inlet of the boiler can be increased, and the fuel consumption of the boiler can be reduced.
Drawings
Fig. 1 is a block diagram of an embodiment of the present system.
Fig. 2 is a diagram of a second configuration of the present system.
Fig. 3 is a three-structure diagram of an embodiment of the present system.
Fig. 4 is a fourth block diagram of an embodiment of the present system.
In the figure, 1, a conventional boiler; 2. condensing boiler; 3. an energy-saving device; 4. a condenser; 5. a water vapor heat exchange air preheater; 6. a heat storage and exchange tank; 7. waste steam heat exchange tube; 8. a condensate tank; 9. a float water intake device; 10. a finned tube heat exchanger; 11. a condensate recovery tank; 12. a condensate pump; 13. deoxidizing water pump; 14. deoxidizing the water tank; 15. a boiler feed water pump; 16. and (5) dividing the air into air cylinders.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Example 1
As shown in fig. 1, the boiler system for waste heat steam heat storage utilization comprises a boiler body, an economizer 3 is arranged on the boiler body, the boiler system further comprises a heat storage heat exchange tank 6 and a condensate water tank 8, the boiler body is connected with the economizer 3 through a pipeline, the heat storage heat exchange tank 6 is connected with the economizer 3 through a boiler water supply pipeline, the interior of the condensate water tank 8 is divided into an upper hot water area and a lower cold water area, a float water intake 9 is arranged in the upper portion of the upper hot water area, a fin tube heat exchanger 10 is further arranged in the middle of the condensate water tank 8, waste steam heat exchange tubes 7 extend into the heat storage heat exchange tank 6, waste steam heat exchange tubes 7 are input into the inlet steam head ends of the waste steam heat exchange tubes 7, the outlet ends of the waste steam heat exchange tubes 7 are connected with the fin tube heat exchanger 10, the float water intake 9 and the heat storage heat exchange tanks 6 are connected through a high-temperature water supply pipeline, and the high-temperature water supply pipeline is connected with a boiler water supply pump 15 in series.
The boiler body adopts a conventional boiler 1.
The bottom of the fin tube heat exchanger 10 is connected with a condensate water discharge pipe, and the tail end of the condensate water discharge pipe is connected with a condensate water recovery tank 11. Because of the large amount of sediment and contaminants in the waste heat steam of the brick industry, this portion of the condensate is typically utilized elsewhere in the normal system, such as by the addition of the stirring water required for the brick making powder.
Example two
As shown in fig. 2, the boiler system for heat storage and utilization of waste heat steam comprises a boiler body, wherein an economizer 3 is arranged on the boiler body, the boiler body is connected with the economizer 3 through a pipeline, the heat storage and heat exchange tank 6 is connected with the economizer 3 through a boiler water supply pipeline, a hot water area at the upper layer and a cold water area at the lower layer are arranged in the condensed water tank 8, a float water intake 9 is arranged in the upper part of the hot water area at the upper layer, a fin tube heat exchanger 10 is further arranged in the middle part of the condensed water tank 8, a waste steam heat exchange tube 7 extends into the heat storage and heat exchange tank 6, steam is input into the head end of the waste steam heat exchange tube 7, the steam outlet end of the waste steam heat exchange tube 7 is connected with the fin tube heat exchanger 10, the float water intake 9 is connected with the heat storage and heat exchange tank 6 through a high-temperature water supply pipeline, the boiler water supply pump 15 is further connected on the high-temperature water supply pipeline in series, the deoxidization water tank 14 is further connected on the high-temperature water supply pipeline in series, and the high-temperature water supply pipeline between the condensed water tank 8 and the deoxidization water tank 14 is further connected in series.
The boiler body adopts a conventional boiler 1.
The bottom of the fin tube heat exchanger 10 is connected with a condensate water discharge pipe, and the tail end of the condensate water discharge pipe is connected with a condensate water recovery tank 11. Because of the large amount of sediment and contaminants in the waste heat steam of the brick industry, this portion of the condensate is typically utilized elsewhere in the normal system, such as by the addition of the stirring water required for the brick making powder.
Example III
As shown in fig. 3, the boiler system for heat storage and utilization of waste heat steam comprises a boiler body, wherein an economizer 3 is arranged on the boiler body, a condenser 4 is connected to the tail end of the economizer 3, the boiler body is connected with the economizer 3 through a pipeline, the heat storage and exchange tank 6 is connected with the economizer 3 through a boiler water supply pipeline, the interior of the condensate water tank 8 is divided into an upper hot water section and a lower cold water section, a floater water intake 9 is arranged in the upper portion of the upper hot water section, a fin tube heat exchanger 10 is further arranged in the middle of the condensate water tank 8, waste heat steam of a heating brick is input into the heat storage and exchange tank 6 through a steam inlet end of the waste heat exchange tube 7, a steam outlet end of the waste heat exchange tube 7 is connected with the fin tube heat exchanger 10, the floater water intake 9 is connected with the heat storage and exchange tank 6 through a high-temperature water supply pipeline, the high-temperature water supply pipeline is connected with a boiler water supply pump 15 in series, the high-temperature water supply pipeline is also connected with the condensate water tank 8 and the cold water section between the condensate water tank 14 in series, the lower water section of the condensate water tank 8 is also connected with the condensate water tank 4 in series with the cold water supply pipeline through the low-temperature water supply pipeline 12, and the condensate water tank 4 is connected with the upper cold water tank 4 in series through the condensate water return pipeline.
The boiler body adopts a condensing boiler 2.
The bottom of the fin tube heat exchanger 10 is connected with a condensate water discharge pipe, and the tail end of the condensate water discharge pipe is connected with a condensate water recovery tank 11. Because of the large amount of sediment and contaminants in the waste heat steam of the brick industry, this portion of the condensate is typically utilized elsewhere in the normal system, such as by the addition of the stirring water required for the brick making powder.
As shown in fig. 4, the boiler system for heat storage and utilization of waste heat steam comprises a boiler body, wherein an economizer 3 is arranged on the boiler body, a condenser 4 is connected to the tail end of the economizer 3, the boiler body is connected with the economizer 3 through a pipeline, the heat storage heat exchange tank 6 is connected with the economizer 3 through a boiler water supply pipeline, the interior of the condensate water tank 8 is divided into an upper hot water section and a lower cold water section, a floater water intake 9 is arranged in the upper portion of the upper hot water section, a fin tube heat exchanger 10 is further arranged in the middle of the condensate water tank 8, waste heat steam of a heating brick is input into the heat storage heat exchange tank 6, the tail end of steam inlet of the waste heat exchange tube 7 is connected with the fin tube heat exchanger 10, the floater water intake 9 is connected with the heat storage heat exchange tank 6 through a high-temperature water supply pipeline, the high-temperature water supply pipeline is connected with a boiler water supply pump 15 in series, the high-temperature water supply pipeline is also connected with the condensate water tank 8 and the deoxidization water tank 14 in series, the high-temperature water supply pipeline is also connected with a water pump 13 in series, the lower water section of the condensate water tank 8 is connected with the condensate water tank 4 in series with the low-temperature water supply pipeline 4 through the low-temperature water supply pipeline 12, and the condensate water tank 4 is connected with the upper cold water tank 4 in series.
The boiler body is also provided with a water vapor heat exchange air preheater 5, and the water vapor heat exchange air preheater 5 is connected in series on a boiler water supply pipeline.
The steam outlet of the boiler body is connected with the sub-cylinder 16 through a steam delivery pipe.
The split cylinders 16 are connected to the deaeration water tank 14 by steam pipes. The waste heat of the system is utilized, and the consumption of steam can be greatly reduced.
The boiler body adopts a condensing boiler 2.
The bottom of the fin tube heat exchanger 10 is connected with a condensate water discharge pipe, and the tail end of the condensate water discharge pipe is connected with a condensate water recovery tank 11. Because of the large amount of sediment and contaminants in the waste heat steam of the brick industry, this portion of the condensate is typically utilized elsewhere in the normal system, such as by the addition of the stirring water required for the brick making powder.
The boiler system for heat storage and utilization of waste heat steam and an operation method thereof are characterized in that firstly, low-temperature water in a lower cold water area in a condensate water tank 8 is pumped into a condenser 4 by a condensate water pump 12, high-temperature water formed by heat exchange of the low-temperature water in the condenser 4 flows back to an upper hot water area in the condensate water tank 8, so that the water temperature of the upper hot water area is always kept at a higher temperature, then the high-temperature water in the upper hot water area is pumped into an deoxidization water tank 14 by a floater water taking device 9 through an deoxidization water pump 13 to reduce deoxidization steam consumption, deoxidization water discharged from the deoxidization water tank 14 is pumped into a heat storage heat exchange tank 6 through a boiler water feeding pump 15 to be heated by waste heat of steam bricks, and then the high-temperature water in the heat storage heat exchange tank 6 flows through a steam heat exchange air preheater 5 for heating combustion air, and the enthalpy value of the air steam is improved; and then the waste heat steam of the added steam bricks enters the finned tube heat exchanger 10 to continuously heat the high-temperature water in the upper-layer hot water area; and then the cooled deoxidized water enters the energy saver 3 again, and enters the boiler body after being further heated, and the boiler body generates steam and then is conveyed to the sub-cylinders 16, and then is distributed to each steam utilization point for use, so that the heating cycle of the system is completed.
In the boiler system for utilizing the waste heat steam for heat accumulation and the operation method thereof, the float water taking principle and the high-low temperature layering measure of the condensate water tank 8 are adopted, so that the water temperature at the bottom of the condensate water tank 8 is lower, and the system utilizes the characteristic that a part of heating surfaces of the condenser 4 are arranged at the tail part of the boiler, thereby further reducing the exhaust smoke temperature of the boiler and improving the comprehensive heat efficiency of the boiler. The steam condensate isolated from the heat storage and exchange tank 6 has a certain temperature, the condensate water is used for continuously heating the condensate water tank 8, and finally the steam condensate water after heat exchange is discharged into the condensate water recovery tank 11 for centralized utilization.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although the conventional boiler 1 is used more herein; a condensing boiler 2; an economizer 3; a condenser 4; a water vapor heat exchange air preheater 5; a heat storage and exchange tank 6; a waste steam heat exchange tube 7; a condensate tank 8; a float water intake 9; a fin tube heat exchanger 10; a condensate recovery tank 11; a condensate pump 12; an oxygen scavenging water pump 13; a deoxygenated water tank 14; a boiler feed water pump 15; cylinder 16, etc., but does not exclude the possibility of using other terms. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.
Claims (7)
1. The boiler system for waste heat steam heat storage utilization comprises a boiler body, wherein an economizer is arranged on the boiler body, the tail part of the economizer is connected with a condenser, the boiler body is connected with the economizer through a pipeline, the heat storage heat exchange tank is connected with the economizer through a boiler water supply pipeline, the condensed water tank is divided into an upper hot water area and a lower cold water area, a floater water intake device is arranged in the upper part of the upper hot water area, a fin tube heat exchanger is further arranged in the middle part of the condensed water tank, a waste steam heat exchange tube extends into the heat storage heat exchange tank, the steam inlet head end of the waste steam heat exchange tube is connected with a heating brick waste heat steam, the steam outlet end of the waste steam heat exchange tube is connected with the fin tube heat exchanger, the floater water intake device is connected with the heat storage heat exchange tank through a high-temperature pipeline, the high-temperature water supply pipeline is connected with a boiler water supply pump in series, the high-temperature water supply pipeline is also connected with the deoxidization water tank in series, the condensed water tank is also connected with a deoxidization water supply pipeline between the cold water tank and the deoxidization water tank, the condensed water supply pipeline is connected with the cold water supply pipeline in series with the low-temperature water supply pipeline, and the condensed water tank is connected with the cold water supply pipeline in series with the cold water tank;
The operation method of the boiler system for heat storage and utilization of waste heat steam is characterized by comprising the following steps of:
1) Firstly, pumping low-temperature water in a lower-layer cold water area in a condensing water tank into a condenser by a condensing water pump, and refluxing high-temperature water formed by heat exchange of the low-temperature water in the condenser to an upper-layer hot water area in the condensing water tank, so that the water temperature of the upper-layer hot water area is always kept at a higher temperature;
2) Then, the float water taking device is utilized to pump the high-temperature water in the upper layer hot water area into the deoxidizing water tank through the deoxidizing water pump so as to reduce the steam consumption of the deoxidizing device;
3) The deoxidized water from the deoxidized water tank is pumped into a heat storage heat exchange tank through a boiler feed pump to be heated by waste heat steam of the steam adding bricks, and then high-temperature water from the heat storage heat exchange tank flows through a steam heat exchange air preheater to heat combustion air and improve the enthalpy value of the air; and then the waste heat steam of the steam adding brick enters the finned tube heat exchanger to continuously heat the high-temperature water in the upper-layer hot water area;
4) And then the cooled deoxidized water enters the energy saver, further heats and enters the boiler body, and the boiler body generates steam and then is conveyed to the split cylinders, so that the steam is distributed to each steam utilization point for use, and the heating cycle of the system is completed.
2. The method according to claim 1, wherein a water vapor heat exchange air preheater is further provided on the boiler body, and the water vapor heat exchange air preheater is connected in series to the boiler water supply pipe.
3. The method of claim 1, wherein the steam outlet of the boiler body is connected to the sub-cylinder via a steam pipe.
4. The method of claim 3, wherein the branch cylinder is connected to the deaeration water tank via a steam pipe.
5. The method of claim 1, wherein the boiler body is a conventional boiler or a condensing boiler.
6. The method of claim 1, wherein the bottom of the finned tube heat exchanger is connected to a condensate drain, and the end of the condensate drain is connected to a condensate recovery tank.
7. The method of claim 1, wherein in step 4), the deoxygenated water entering the economizer is further passed through a water-vapor heat exchange air preheater to further improve the heat exchange conditions of the economizer.
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| JP2012220077A (en) * | 2011-04-07 | 2012-11-12 | Mitsubishi Heavy Ind Ltd | Water supply pipe for steam generator |
| CN102330966B (en) * | 2011-08-17 | 2013-07-17 | 安阳方快锅炉有限公司 | Energy-saving heat-supplying device of condensation steam boiler |
| CN104006373A (en) * | 2014-05-30 | 2014-08-27 | 上海汇闵能源科技有限公司 | Device and method for recycling afterheat of smoke of steam boiler |
| CN204042946U (en) * | 2014-08-12 | 2014-12-24 | 天津诺能达能源科技有限公司 | Gas fired-boiler flue gas waste heat recovery and flue gas demister system |
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| CN111853758A (en) | 2020-10-30 |
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