CN104654273A - Boiler tail portion smoke heat energy recovery and low-temperature sulfur removal device and method - Google Patents
Boiler tail portion smoke heat energy recovery and low-temperature sulfur removal device and method Download PDFInfo
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- CN104654273A CN104654273A CN201310639189.4A CN201310639189A CN104654273A CN 104654273 A CN104654273 A CN 104654273A CN 201310639189 A CN201310639189 A CN 201310639189A CN 104654273 A CN104654273 A CN 104654273A
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Abstract
The invention relates to a boiler tail portion smoke heat energy recovery and low-temperature sulfur removal device and method. The boiler tail portion smoke heat energy recovery and low-temperature sulfur removal device comprises a boiler tail portion flue, wherein a partition valve is arranged in the flue and divides the flue into a waste smoke entering section flue and a waste smoke exhausting section flue. A heat exchanger is arranged above the flue and is provided with multiple heat exchange pipes arranged in the vertical direction, the heat exchange pipes are respectively located above the waste smoke entering section flue and the waste smoke exhausting section flue, and a liquid recovery groove is formed in the lower portion of the flue. Boiler waste smoke is led into the waste smoke entering section flue through an induced draft fan, and waste smoke is discharged through the waste smoke exhausting section flue through the heat exchanger. Sulfur dioxide in the waste smoke is subjected to cold condensation in the heat exchange pipes to form water drops, and the water drops fall into the liquid recovery groove formed in the lower portion of the flue to achieve recovery of sulfur dioxide and other impurities.
Description
Technical field
The present invention relates to a kind of boiler tail flue gas energy recovery, low temperature desulfurizing device and method.
Background technology
Boiler is the power plant being widely used in factory and enterprise and society, and the boiler that such as thermal power plant generates electricity, plant produced are for generation of steam and the boiler of heat energy, the heating boiler of people's lives heating etc.All there is the problem of a general character in these boilers, is exactly, and national boiler design specification regulation, exhaust gas temperature is all at 150 DEG C-160 DEG C Celsius.Each tonnage of boiler, needs per hour discharge more than the 150 DEG C waste hot gas Celsius of about 3500 cubic metres in air, the flue gas namely produced during boiler fuel combustion.The heat energy contained in flue gas enters along with the discharge of flue gas among air, cause the waste of energy, and also containing a certain amount of sulphur and other composition among flue gas, sulphur is that the boiler fuel such as burning coal, diesel oil etc. that is in operation produced, and causes the pollution of environment.Heat energy in the flue gas of boiler emission and sulfur recovery being utilized, is the technical problem being badly in need of solving.
Existing solution transforms boiler, separated by the sulfur dioxide that boiler is discharged, then reclaim by charcoal acid calcium sulphur removal method, but the heat energy that boiler is discharged can not get reclaiming and utilizing, and the method investment of reclaiming sulphur is large, and cost is high.Very large burden is caused to enterprise.
Summary of the invention
Goal of the invention of the present invention is to provide a kind of boiler tail flue gas energy recovery, low temperature desulfurizing device and method, and the smoke heat energy can discharged boiler is recycled, and effectively can reclaim sulphur.
Based on same inventive concept, the present invention has two independent technique schemes:
1, boiler tail flue gas energy recovery, a low temperature desulfurizing device, comprise boiler back end ductwork.It is characterized in that: be provided with isolating valve in flue, isolating valve flue is separated into useless cigarette approach section flue and useless cigarette discharges section flue; Be provided with heat exchanger above flue, heat exchanger has the many heat exchanger tubes vertically arranged, 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.
Energy recovery heat-exchanger rig 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; Energy recovery heat-exchanger rig can be the two-layer or sandwich construction combined by single-layer air heat exchanger and individual layer water-to-water heat exchanger.
Individual layer heat exchanger is made up of one or more heat exchanger unit, the heat exchanger tube that heat exchanger unit is vertically arranged by casing and Duo Gen forms, heat exchanger tube is positioned at casing, heat exchanger tube top and bottom respectively with top and the bottom connection of casing, the top of casing is corresponding with bottom has through hole, and through hole communicates with the suitable for reading of heat exchanger tube and end opening; Each heat exchange unit body side is interconnected, and is provided with connection smoke box lid, leaves flow of flue gas space between connection smoke box lid and each heat exchange unit box top above box top.
Heat exchanger be two-layer or sandwich construction time, the through hole at lower floor's heat exchange unit casing top is corresponding with the lead to the hole site of last layer heat exchange unit bottom half 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 in the middle part of heat exchanger.
Heat exchanger tube employing is corrosion-resistant, high-thermal conductive metal material is made.
2, utilize said apparatus to carry out a method for boiler tail flue gas energy recovery, low temperature sulphur removal, it is characterized in that: introduced useless cigarette entered flue by the air-introduced machine cigarette that to be given up by boiler, useless cigarette is discharged flue through heat exchanger by the cigarette that gives up and discharged; Sulfur dioxide in useless cigarette is met condensation and is formed water droplet in heat exchanger tube, and water droplet falls into flue lower liquid accumulator tank, realizes the recovery of sulfur dioxide and other impurity.
Energy recovery heat-exchanger rig can be single-layer air heat exchanger or individual layer water-to-water heat exchanger, also can be the two-layer or sandwich construction combined by single-layer air heat exchanger and individual layer water-to-water heat exchanger; By air-introduced machine, outside air is introduced in air heat exchanger, by air heat exchanger heat exchange heat outputting air, hot-air by air blast enter in boiler furnace realize combustion-supporting; Make water at low temperature enter in water-to-water heat exchanger by water pump, after water-to-water heat exchanger heat exchange, export high-temperature water.
Boiler blow-down water enters water-to-water heat exchanger, and after water-to-water heat exchanger heat exchange, high-temperature water can directly enter boiler main heat supply pipeline, realizes open circulation; High-temperature water can enter hot and cold water heat exchanger, and boiler blow-down water, by after the heating of hot and cold water heat exchanger, enters boiler main heat supply pipeline, and the water at low temperature that hot and cold water heat exchanger exports enters water-to-water heat exchanger, realizes closed cycle.
The beneficial effect that the present invention has:
The present invention 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 DEG C Celsius of average out to, winter-20 DEG C Celsius of the average out in the north.The fresh cold air blown into reduces the temperature of boiler combustion indoor, outside air of the present invention forms hot-air by air heat exchanger heat exchange, normal temperature fresh air is heated to about 140 DEG C Celsius, hot-air enters in boiler furnace combustion-supporting, improve fire box temperature, strengthen combustion-supporting effect, effective fuel saving.
Low-temperature return water of the present invention forms high-temperature water by water-to-water heat exchanger heat exchange, can spend low-temperature return water be heated to about 90 DEG C high-temperature water by about 30, then is delivered to boiler main pipeline and participates in heat supply directly, effectively make use of the heat energy that flue gas discharged by boiler, fuel saving.
The sulfur dioxide that the present invention gives up in cigarette is met condensation and is formed water droplet in heat exchanger tube, water droplet falls into flue and realizes sulfur dioxide recovery, namely sulphur is reclaimed by low temperature process, compared with existing process for sulfur removal, sulfur limitation effect is good, and save great amount of cost, but also can effectively utilize smoke heat energy, fuel saving simultaneously.
The flue gas of boiler, by the process of apparatus of the present invention, finally forms the harmless flue gas of low temperature and discharges, reach environmental protection standard completely.The present invention is easy to boiler improvement, invests little, and income is large, through running experiment, can save boiler fired coal more than 25 percent.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
As shown in Figure 1, heat exchanger is provided with above flue, heat exchanger can be single-layer air heat exchanger, individual layer water-to-water heat exchanger, and the two-layer or sandwich construction that can be combined by single-layer air heat exchanger and individual layer water-to-water heat exchanger, heat exchanger is made up of corrosion-resistant high-thermal conductive metal material.In the present embodiment, heat exchanger is the double-layer structure be 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 lines 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.
During enforcement, single-layer air heat exchanger or water-to-water heat exchanger are made up of multiple heat exchanger unit, and in the present embodiment, air heat exchanger and water-to-water heat exchanger form by 4 heat exchanger units.The heat exchanger tube 3 that each heat exchanger unit is vertically arranged by casing and Duo Gen forms, heat exchanger tube is positioned at casing, heat exchanger tube top and bottom respectively with top and the bottom connection of casing, the top of casing is corresponding with bottom has through hole, and through hole communicates with the suitable for reading of heat exchanger tube and end opening; Each heat exchange unit body side is interconnected, and the top of water heat exchange unit box top is provided with connection smoke box lid 11, leaves flow of flue gas space between connection smoke box lid 11 and water heat exchange unit box top.The through hole at lower air heat exchange unit casing top is corresponding with the lead to the hole site of last layer water heat exchange unit bottom half and communicate.
Be provided with isolating valve 8 in flue, during enforcement, isolating valve 8 adopts butterfly valve, and isolating valve is positioned at the below of air heat exchanger medium position, and flue is isolated into useless cigarette and enters flue 9 and useless cigarette discharge flue 10 by isolating valve.The useless cigarette heat exchanger tube entered above flue 9 discharge flue 10 with useless cigarette above heat exchanger tube quantity identical.Flue bottom is provided with sulfur dioxide and other impurity accumulator tank.
During work, introduced useless cigarette entered flue 9 by the air-introduced machine cigarette that to be given up by boiler, useless cigarette is discharged cigarette 10 road by useless cigarette and is discharged after heat exchanger tube 3 heat exchange; Introduce in air heat exchanger 2 by air-introduced machine by outside air, by air heat exchanger heat exchange, normal temperature fresh air is heated to about 140 DEG C 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, about 30 spend low-temperature return water is heated to about 90 DEG C high-temperature water outputs;
Because cold air takes away heat, Tube Sheet of Heat Exchanger is cooled, and the steam inside flue gas and impurity form water smoke and is attached on inside pipe wall more poly-more after meeting cold cooling, and the heat inside flue gas constantly flows out to supplement from boiler tail and exchanges convection current.Sulfur dioxide in useless cigarette is met condensation and is formed water droplet in heat exchanger tube, and declining by gravity and near-wall cooling flue gas drives, and start down to trickle, water droplet drops in accumulator tank with sulphur and other impurity and flows out flue by pipeline, recycles.
The high-temperature water exported can pass through open circulation or closed cycle two kinds of modes, carries 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, by after the heating of hot and cold water heat exchanger, enters boiler main heat supply pipeline, and the water at low temperature that hot and cold water heat exchanger exports enters water-to-water heat exchanger, realizes closed cycle.
Claims (9)
1. boiler tail flue gas energy recovery, a low temperature desulfurizing device, comprise boiler back end ductwork.It is characterized in that: be provided with isolating valve in flue, isolating valve flue is separated into useless cigarette approach section flue and useless cigarette discharges section flue; Be provided with heat exchanger above flue, heat exchanger has the many heat exchanger tubes vertically arranged, 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: energy recovery heat-exchanger rig 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; Energy recovery heat-exchanger rig can be the two-layer or sandwich construction 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: individual layer heat exchanger is made up of one or more heat exchanger unit, the heat exchanger tube that heat exchanger unit is vertically arranged by casing and Duo Gen forms, heat exchanger tube is positioned at casing, heat exchanger tube top and bottom respectively with top and the bottom connection of casing, the top of casing is corresponding with bottom has through hole, and through hole communicates with the suitable for reading of heat exchanger tube and end opening; Each heat exchange unit body side is interconnected, and is provided with connection smoke box lid, leaves flow of flue gas space between connection smoke box lid and each heat exchange unit box top above box top.
4. boiler tail flue gas energy recovery according to claim 3, low temperature desulfurizing device, it is characterized in that: heat exchanger be two-layer or sandwich construction time, the through hole at lower floor's heat exchange unit casing top is corresponding with the lead to the hole site of last layer heat exchange unit bottom half 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 in the middle part of heat exchanger.
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.
7. device carries out the method for boiler tail flue gas energy recovery, low temperature sulphur removal according to claim 1, it is characterized in that: introduced useless cigarette entered flue by the air-introduced machine cigarette that to be given up by boiler, useless cigarette is discharged flue through heat exchanger by the cigarette that gives up and discharged; Sulfur dioxide in useless cigarette is met condensation and is formed water droplet in heat exchanger tube, and water droplet falls into flue lower liquid accumulator tank, realizes the recovery of sulfur dioxide and other impurity.
8. method according to claim 7, is characterized in that: energy recovery heat-exchanger rig can be single-layer air heat exchanger or individual layer water-to-water heat exchanger, also can be the two-layer or sandwich construction combined by single-layer air heat exchanger and individual layer water-to-water heat exchanger; By air-introduced machine, outside air is introduced in air heat exchanger, by air heat exchanger heat exchange heat outputting air, hot-air by air blast enter in boiler furnace realize combustion-supporting; Make water at low temperature enter in water-to-water heat exchanger by water pump, after water-to-water heat exchanger heat exchange, export high-temperature water.
9. method according to claim 8, is characterized in that: boiler blow-down water enters water-to-water heat exchanger, and after water-to-water heat exchanger heat exchange, high-temperature water can directly enter boiler main heat supply pipeline, realizes open circulation; High-temperature water can enter hot and cold water heat exchanger, and boiler blow-down water, by after the heating of hot and cold water heat exchanger, enters boiler main heat supply pipeline, and the water at low temperature that hot and cold water heat exchanger exports enters water-to-water heat exchanger, realizes closed cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310639189.4A CN104654273A (en) | 2013-11-25 | 2013-11-25 | Boiler tail portion smoke heat energy recovery and low-temperature sulfur removal device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310639189.4A CN104654273A (en) | 2013-11-25 | 2013-11-25 | Boiler tail portion smoke heat energy recovery and low-temperature sulfur removal device and method |
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| CN104654273A true CN104654273A (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310639189.4A Pending CN104654273A (en) | 2013-11-25 | 2013-11-25 | Boiler tail portion smoke heat energy recovery and low-temperature sulfur removal device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111220002A (en) * | 2018-11-26 | 2020-06-02 | 宁波方太厨具有限公司 | Heat exchanger and water heater comprising same |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0691156A2 (en) * | 1994-07-05 | 1996-01-10 | THE BABCOCK & WILCOX COMPANY | Flue gas treatment |
| JP2004020106A (en) * | 2002-06-18 | 2004-01-22 | Mitsubishi Heavy Ind Ltd | Steam generator |
| CN201101945Y (en) * | 2007-10-11 | 2008-08-20 | 宋宝程 | Water-bath smoke removing and desulfurizing duster |
| CN101476717A (en) * | 2009-01-19 | 2009-07-08 | 高尔荣 | Flue gas processing equipment of boiler |
| CN101496989A (en) * | 2009-01-16 | 2009-08-05 | 贵阳云中节能设备制装厂 | High-efficient desulfurizing and dedusting energy-saving apparatuses |
| CN203099869U (en) * | 2013-02-04 | 2013-07-31 | 浙江德创环保科技有限公司 | Device using high-temperature smoke to heat baffle door sealing air |
| CN203148269U (en) * | 2013-01-11 | 2013-08-21 | 湖南三锦节能环保科技有限公司 | Energy-saving environment-friendly dust remover |
| CN203642157U (en) * | 2013-11-25 | 2014-06-11 | 杨双来 | Boiler tail flue gas heat recovery and low-temperature sulfur removal device |
-
2013
- 2013-11-25 CN CN201310639189.4A patent/CN104654273A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0691156A2 (en) * | 1994-07-05 | 1996-01-10 | THE BABCOCK & WILCOX COMPANY | Flue gas treatment |
| JP2004020106A (en) * | 2002-06-18 | 2004-01-22 | Mitsubishi Heavy Ind Ltd | Steam generator |
| CN201101945Y (en) * | 2007-10-11 | 2008-08-20 | 宋宝程 | Water-bath smoke removing and desulfurizing duster |
| CN101496989A (en) * | 2009-01-16 | 2009-08-05 | 贵阳云中节能设备制装厂 | High-efficient desulfurizing and dedusting energy-saving apparatuses |
| CN101476717A (en) * | 2009-01-19 | 2009-07-08 | 高尔荣 | Flue gas processing equipment of boiler |
| CN203148269U (en) * | 2013-01-11 | 2013-08-21 | 湖南三锦节能环保科技有限公司 | Energy-saving environment-friendly dust remover |
| CN203099869U (en) * | 2013-02-04 | 2013-07-31 | 浙江德创环保科技有限公司 | Device using high-temperature smoke to heat baffle door sealing air |
| CN203642157U (en) * | 2013-11-25 | 2014-06-11 | 杨双来 | Boiler tail flue gas heat recovery and low-temperature sulfur removal device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111220002A (en) * | 2018-11-26 | 2020-06-02 | 宁波方太厨具有限公司 | Heat exchanger and water heater comprising same |
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