CN203642157U - Boiler tail flue gas heat recovery and low-temperature sulfur removal device - Google Patents
Boiler tail flue gas heat recovery and low-temperature sulfur removal device Download PDFInfo
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- CN203642157U CN203642157U CN201320788310.5U CN201320788310U CN203642157U CN 203642157 U CN203642157 U CN 203642157U CN 201320788310 U CN201320788310 U CN 201320788310U CN 203642157 U CN203642157 U CN 203642157U
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Abstract
The utility model relates to a boiler tail flue gas heat recovery and low-temperature sulfur removal device comprising a boiler tail flue gas channel provided with an insulating valve inside. The insulating valve partitions the flue gas channel into a waste flue gas incoming segment and a waste flue gas exhausting segment. A heat exchanger is arranged above the flue gas channel and is provided with a plurality of vertically-arranged heat exchanging tubes. The heat exchanging tubes are respectively located above the waste flue gas incoming segment and the waste flue gas exhausting segment. A fluid recovery groove is arranged on the lower portion of the flue gas channel.
Description
Technical field
The utility model relates to a kind of boiler tail flue gas energy recovery, low temperature desulfurizing device.
Background technology
Boiler is the production capacity equipment that is widely used in factory and enterprise and society, such as the boiler of thermal power plant generating use, plant produced are for generation of the boiler of steam and heat energy, heating boiler of people's lives heating etc.All there is the problem of a general character in these boilers, is exactly, national boiler design regulation and stipulation, and exhaust gas temperature is all at 150 ℃-160 ℃ Celsius.Each tonnage of boiler per hourly need to discharge the more than 150 ℃ waste hot gas Celsius of approximately 3500 cubic metres in atmosphere, the flue gas namely producing when boiler fuel combustion.The heat energy containing in flue gas enters along with the discharge of flue gas among atmosphere, cause the waste of energy, and among flue gas, also containing a certain amount of sulphur and other composition, sulphur is that the boiler fuel such as burning coal, diesel oil that are in operation produce, and has caused the pollution of environment.By the heat energy in the flue gas of boiler emission and sulfur recovery utilization, it is the technical problem of being badly in need of solution.
Existing solution is that boiler is transformed, and by calcium carbonate sulphur removal method, the sulfur dioxide of boiler discharge is separated, and then reclaim, but the heat energy that boiler is discharged can not get reclaiming and utilizing, and the method investment of recovery sulphur is large, and cost is high.Cause very large burden to enterprise.
Utility model content
Utility model object of the present utility model is to provide a kind of boiler tail flue gas energy recovery, low temperature desulfurizing device, and the smoke heat energy that can discharge boiler is recycled, and can effectively reclaim sulphur.
Realize the technical scheme of the present utility model object:
A kind of boiler tail flue gas energy recovery, low temperature desulfurizing device, comprise boiler back end ductwork, it is characterized in that: in flue, be provided with isolating valve, flue is separated into useless cigarette approach section flue to isolating valve and useless cigarette is discharged section flue; Flue top is provided with heat exchanger, and heat exchanger has the many vertical heat exchanger tubes that arrange, and heat exchanger tube lays respectively at the top of useless cigarette approach section flue and useless cigarette discharge section flue, and flue bottom is provided with liquid recovery.
Heat exchanger can be single-layer air heat exchanger or individual layer water-to-water heat exchanger, and air heat exchanger is connected to cold air inlet pipe and hot-air goes out pipe; Water-to-water heat exchanger is connected to low temperature water inlet pipe and high-temperature water outlet pipe; Heat exchanger can be the two-layer or sandwich construction being combined by single-layer air heat exchanger and individual layer water-to-water heat exchanger.
Single-layer air heat exchanger or individual layer water-to-water heat exchanger are made up of one or more heat exchanger units, heat exchanger unit is made up of casing and the vertical heat exchanger tube arranging of Duo Gen, heat exchanger tube is positioned at casing, heat exchanger tube top and bottom respectively with top and the bottom connection of casing, the corresponding through hole that has in the top of casing and bottom, through hole communicates with the suitable for reading and end opening of heat exchanger tube; Each heat exchange unit casing side is interconnected, and box top top is provided with connection smoke box lid, between connection smoke box lid and each heat exchange unit box top, leaves flow of flue gas space.
When heat exchanger is the two-layer or sandwich construction being combined by single-layer air heat exchanger and individual layer water-to-water heat exchanger, the through hole at the heat exchange unit casing top of lower floor's single-layer air heat exchanger or individual layer water-to-water heat exchanger is corresponding with the lead to the hole site of the heat exchange unit bottom half of last layer single-layer air heat exchanger or individual layer water-to-water heat exchanger and communicate, and the top of top layer heat exchange unit box top is provided with connection smoke box lid.
Isolating valve in flue is single valve or multiple valve composition, and isolating valve is positioned at the below at heat exchanger middle part.
Heat exchanger tube employing is corrosion-resistant, high-thermal conductive metal material is made.
The beneficial effect the utlity model has:
The utility model is provided with heat exchanger above flue, and heat exchanger can be air heat exchanger, water-to-water heat exchanger or the combination of the two, can be one or more layers.The flue gas that boiler is discharged carries out heat exchange by air heat exchanger and water-to-water heat exchanger.
The combustion air of existing boiler is outdoor normal temperature fresh air, summer 20 ℃ Celsius of average out to ,-20 ℃ Celsius of winter north average out to.The fresh cold air blowing into has reduced the indoor temperature of boiler combustion, the utility model outside air can form hot-air by air heat exchanger heat exchange, normal temperature fresh air is heated to 140 ℃ of left and right Celsius, hot-air enters in boiler furnace combustion-supporting, improve fire box temperature, strengthen combustion-supporting effect, effectively fuel saving.
The utility model low temperature backwater forms high-temperature water by water-to-water heat exchanger heat exchange, can be heated to 90 ℃ of left and right high-temperature water by 30 left and right degree low temperature backwater, then is delivered to boiler main pipeline and participates in heat supply directly, has effectively utilized boiler to discharge the heat energy of flue gas, fuel saving.
Sulfur dioxide in the useless cigarette of the utility model is met condensation and is formed water droplet in heat exchanger tube, water droplet falls into flue and realizes sulfur dioxide recovery, reclaim sulphur by low temperature process, compared with existing process for sulfur removal, sulfur limitation effect is good, and saving great amount of cost, but also can effectively utilize fuel saving to smoke heat energy simultaneously.
The flue gas of boiler, by the processing of the utility model device, finally forms the harmless flue gas of low temperature and discharges, and reaches environmental protection standard completely.The utility model is easy to boiler improvement, invests littlely, and income is large, through running experiment, can save boiler fired coal more than 25 percent.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
The specific embodiment
As shown in Figure 1, flue top is provided with heat exchanger, heat exchanger can be single-layer air heat exchanger, individual layer water-to-water heat exchanger, the two-layer or sandwich construction that can be combined by single-layer air heat exchanger and individual layer water-to-water heat exchanger, and heat exchanger is made up of corrosion-resistant high-thermal conductive metal material.In the present embodiment, heat exchanger is the double-layer structure being made up of single-layer air heat exchanger 2 and individual layer water-to-water heat exchanger 1.Individual layer water-to-water heat exchanger 1 is positioned at the top of air heat exchanger 2, and air heat exchanger is connected to air inlet pipe 6 and hot-air goes out pipe 7; Water-to-water heat exchanger is connected to low temperature water inlet pipe 4 and high-temperature water outlet pipe 5.
When enforcement, single-layer air heat exchanger or water-to-water heat exchanger are made up of multiple heat exchanger units, and in the present embodiment, air heat exchanger and water-to-water heat exchanger form by 4 heat exchanger units.Each heat exchanger unit is made up of casing and the vertical heat exchanger tube 3 arranging of Duo Gen, heat exchanger tube is positioned at casing, heat exchanger tube top and bottom respectively with top and the bottom connection of casing, the corresponding through hole that has in the top of casing and bottom, through hole communicates with the suitable for reading and end opening of heat exchanger tube; Each heat exchange unit casing side is interconnected, and the top of water heat exchange unit box top is provided with connection smoke box lid 11, between connection smoke box lid 11 and water heat exchange unit box top, leaves flow of flue gas space.The lead to the hole site of the through hole at lower floor's air heat-exchange unit box top and upper water heat exchange unit bottom half is corresponding and communicate.
In flue, be provided with isolating valve 8, when enforcement, isolating valve 8 adopts butterfly valve, and isolating valve is positioned at the below of air heat exchanger medium position, and isolating valve is isolated into useless cigarette by flue and enters flue 9 and useless cigarette discharge flue 10.The heat exchanger tube that useless cigarette enters flue 9 tops is identical with the heat exchanger tube quantity of useless cigarette discharge flue 10 tops.Flue bottom is provided with sulfur dioxide and other impurity accumulator tank.
When work, by air-introduced machine, useless boiler cigarette is introduced to useless cigarette and enter flue 9, useless cigarette is discharged Yan10 road by useless cigarette and is discharged after heat exchanger tube 3 heat exchange; By air-introduced machine, outside air is introduced in air heat exchanger 2, by air heat exchanger heat exchange, normal temperature fresh air is heated to 140 ℃ of left and right Celsius, hot-air by air blast enter in boiler furnace, realize combustion-supporting; Water at low temperature enters in water-to-water heat exchanger 1, and by water-to-water heat exchanger heat exchange, 30 left and right degree low temperature backwater are heated to 90 ℃ of left and right high-temperature water outputs;
Because cold air is taken away heat, Tube Sheet of Heat Exchanger is cooled, and the steam of flue gas the inside and impurity are met and formed water smoke after cold cooling and be attached on inside pipe wall more poly-manyly, and the heat of flue gas the inside constantly flows out and supplements exchange convection current from boiler tail.Sulfur dioxide in useless cigarette is met condensation and is formed water droplet in heat exchanger tube, declined by near the flue gas of lowering the temperature of gravity and tube wall and drives, and starts down to trickle, and water droplet drops in accumulator tank and flows out flue by pipeline with sulphur and other impurity, recycles.
The high-temperature water of output can, by open circulation or two kinds of modes of closed cycle, carry out heat supply.
Open circulation: boiler blow-down water enters water-to-water heat exchanger, after water-to-water heat exchanger heat exchange, high-temperature water can directly enter boiler main heat supply pipeline, realizes open circulation.
Closed cycle: high-temperature water enters hot and cold water heat exchanger, boiler blow-down water enters boiler main heat supply pipeline after heating by hot and cold water heat exchanger, and the water at low temperature of hot and cold water heat exchanger output enters water-to-water heat exchanger, realizes closed cycle.
Claims (6)
1. boiler tail flue gas energy recovery, a low temperature desulfurizing device, comprise boiler back end ductwork, it is characterized in that: in flue, be provided with isolating valve, flue is separated into useless cigarette approach section flue to isolating valve and useless cigarette is discharged section flue; Flue top is provided with heat exchanger, and heat exchanger has the many vertical heat exchanger tubes that arrange, and heat exchanger tube lays respectively at the top of useless cigarette approach section flue and useless cigarette discharge section flue, and flue bottom is provided with liquid recovery.
2. boiler tail flue gas energy recovery according to claim 1, low temperature desulfurizing device, is characterized in that: heat exchanger can be single-layer air heat exchanger or individual layer water-to-water heat exchanger, and air heat exchanger is connected to cold air inlet pipe and hot-air goes out pipe; Water-to-water heat exchanger is connected to low temperature water inlet pipe and high-temperature water outlet pipe; Heat exchanger can be the two-layer or sandwich construction being combined by single-layer air heat exchanger and individual layer water-to-water heat exchanger.
3. boiler tail flue gas energy recovery according to claim 2, low temperature desulfurizing device, it is characterized in that: single-layer air heat exchanger or individual layer water-to-water heat exchanger are made up of one or more heat exchanger units, heat exchanger unit is made up of casing and the vertical heat exchanger tube arranging of Duo Gen, heat exchanger tube is positioned at casing, heat exchanger tube top and bottom respectively with top and the bottom connection of casing, the corresponding through hole that has in the top of casing and bottom, through hole communicates with the suitable for reading and end opening of heat exchanger tube; Each heat exchange unit casing side is interconnected, and box top top is provided with connection smoke box lid, between connection smoke box lid and each heat exchange unit box top, leaves flow of flue gas space.
4. boiler tail flue gas energy recovery according to claim 3, low temperature desulfurizing device, it is characterized in that: when heat exchanger is the two-layer or sandwich construction being combined by single-layer air heat exchanger and individual layer water-to-water heat exchanger, the through hole at the heat exchange unit casing top of lower floor's single-layer air heat exchanger or individual layer water-to-water heat exchanger is corresponding with the lead to the hole site of the heat exchange unit bottom half of last layer single-layer air heat exchanger or individual layer water-to-water heat exchanger and communicate, and the top of top layer heat exchange unit box top is provided with connection smoke box lid.
5. boiler tail flue gas energy recovery according to claim 4, low temperature desulfurizing device, is characterized in that: the isolating valve in flue is single valve or multiple valve composition, and isolating valve is positioned at the below at heat exchanger middle part.
6. boiler tail flue gas energy recovery according to claim 5, low temperature desulfurizing device, is characterized in that: heat exchanger tube employing is corrosion-resistant, high-thermal conductive metal material is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320788310.5U CN203642157U (en) | 2013-11-25 | 2013-11-25 | Boiler tail flue gas heat recovery and low-temperature sulfur removal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320788310.5U CN203642157U (en) | 2013-11-25 | 2013-11-25 | Boiler tail flue gas heat recovery and low-temperature sulfur removal device |
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| CN203642157U true CN203642157U (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320788310.5U Expired - Fee Related CN203642157U (en) | 2013-11-25 | 2013-11-25 | Boiler tail flue gas heat recovery and low-temperature sulfur removal device |
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| CN (1) | CN203642157U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104654273A (en) * | 2013-11-25 | 2015-05-27 | 杨双来 | Boiler tail portion smoke heat energy recovery and low-temperature sulfur removal device and method |
-
2013
- 2013-11-25 CN CN201320788310.5U patent/CN203642157U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104654273A (en) * | 2013-11-25 | 2015-05-27 | 杨双来 | Boiler tail portion smoke heat energy recovery and low-temperature sulfur removal device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 Termination date: 20171125 |