CN203571777U - Flue gas treatment device - Google Patents
Flue gas treatment device Download PDFInfo
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- CN203571777U CN203571777U CN201320758140.6U CN201320758140U CN203571777U CN 203571777 U CN203571777 U CN 203571777U CN 201320758140 U CN201320758140 U CN 201320758140U CN 203571777 U CN203571777 U CN 203571777U
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- heat exchanger
- flue gas
- flue
- processing device
- circulating system
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Abstract
The utility model relates to a flue gas treatment device, in particular to a device for treating flue gas after a wet flue gas desulfurization process. Specifically, the flue gas treatment device is characterized in that the flue gas treatment device is a vapor compression cycle system comprising a first heat exchanger; the first heat exchanger is arranged in a flue between a wet desulfurization device and a chimney; the first heat exchanger is used as a condenser of the vapor compression cycle system, and used for heating the flue gas. According to the flue gas treatment device provided by the utility model, the temperature of the flue gas at the exit of the chimney is increased, so that dew formation is avoided, gypsum rain is prevented from occurring, the environment is well protected, the corrosion of the chimney is relieved, the operating duty of a cooling tower is reduced, and the generating efficiency of a unit is also improved.
Description
Technical field
The utility model relates to a kind of flue gas processing device, the device of particularly flue gas after wet fuel gas desulfurizing technology being processed.
Background technology
At present, flue gas desulphurization system has all been installed in most of power plants.Adopt wet fuel gas desulfurizing technology, specifically, as adopted limestone-gypsum sulfur removal technology, at flue gas, from chimney, in discharge process, be prone to gypsum rain phenomenon, i.e. the situation of " wet chimney ", not only the running in power plant is brought safely to certain harm, and ecological environment is around brought to pollution.Existing solution majority all adopts flue gas heat-exchange unit (GGH), and the employing boiler secondary air also having heats clean flue gas, increases electric heater unit, controls flue gas flow rate, strengthens demister effect.But problem is many, as large in high, the fluctuation of service of falling flat, consume energy, later maintenance amount etc.Therefore, find rationally effectively control measures, thereby can at utmost reduce the generation of gypsum rain phenomenon, be current or following all in the urgent need to.
Summary of the invention
The technical problems to be solved in the utility model is: solve the problem that above-mentioned prior art exists, and provide a kind of novel, effectively prevent the flue gas heating system that gypsum rain produces.
The technical solution adopted in the utility model is a kind of flue gas processing device, and described flue gas processing device is the steam compression circulating system that comprises First Heat Exchanger, and described First Heat Exchanger is arranged in the flue between wet desulfurizer and chimney; Described First Heat Exchanger is as the condenser of steam compression circulating system.
The refrigerant entrance of described First Heat Exchanger is connected with throttle part, and the refrigerant exit of First Heat Exchanger is connected with compressor, and is also connected with the second heat exchanger between compressor and throttle part.
The refrigerant medium that described steam compression circulating system adopts is CO2, and the CO2 in described First Heat Exchanger is supercriticality.
Described First Heat Exchanger is arranged in exhaust gases passes, and the refrigerant heat exchanger tube of First Heat Exchanger is vertically to arrange.
Described First Heat Exchanger is arranged in a by-pass flue, and flue gas after treatment mixes with other flue gases at meet.
In described steam compression circulating system, be provided with cross valve, this cross valve flows to and controls the refrigerant of First Heat Exchanger; Described steam compression circulating system comprises first state of First Heat Exchanger as evaporimeter; Described steam compression circulating system comprises second state of First Heat Exchanger as condenser.
The second heat exchanger in described steam compression circulating system is air heat exchanger, and under the first state status, the second heat exchanger is as condenser; Under the second state, in situation, the second heat exchanger is evaporimeter.
In described steam compression circulating system, also have the second heat exchanger using as evaporimeter, this second heat exchanger is arranged in the flue between First Heat Exchanger and wet desulfurizer.
Wherein, limestone-gypsum method flue gas desulfurization or ammonia type flue gas desulfurizing all belong to wet process of FGD, and through wet desulphurization, smoke moisture increases, and temperature reduces, and flue gas is very easily in inner wall of stack dewfall.Main because, smoke moisture after desulfurization is greater than saturated humidity, while entering chimney, atmospheric temperature outside chimney will be lower than the dew-point temperature of flue gas, so, will make the flue gas in chimney produce condensation, the utility model carries out cool-down dehumidification by First Heat Exchanger to flue gas exactly, reduce the absolute humidity of flue gas, or through heating, reduce in some cases the relative humidity of flue gas; Or dehumidifying and improve flue-gas temperature and combine, does not also reach in the situation of dew-point temperature flue gas in chimney and just leaves chimney, avoids occurring the phenomenon of wet chimney.
Fig. 1 is the structural representation of the utility model the first embodiment;
Fig. 2 is the structural representation of the utility model the second embodiment;
Fig. 3 is the structural representation of the utility model the 3rd embodiment;
Fig. 4 is the structural representation of the another kind of form of implementation of the utility model the 3rd embodiment;
Fig. 5 is the schematic diagram of the another kind of embodiment of the utility model.
Wherein: 1. flue gas processing device, 2. wet desulfurizer, 3. flue, 4. chimney, 5. First Heat Exchanger, 6. the second heat exchanger, 7. compressor, 8. throttle part, 9. cross valve, 10. heat exchange fan, 11. by-pass flues, 12. meets.
The specific embodiment
Below by the specific embodiment, introduce in detail the utility model
Embodiment mono-
As shown in Figure 1, in dotted line frame is flue gas processing device 1, this device 1 comprises steam compression circulating system, be compressor 7, First Heat Exchanger 5, throttle part 8 and the second heat exchanger 6 being linked in sequence by refrigerant pipe in Fig. 1, refrigerant by after First Heat Exchanger 5, throttle part 8 and the second heat exchanger 6, is got back to compressor 7 according to the outlet direction order of compressor 7.The refrigerant entrance that is First Heat Exchanger 5 is connected with compressor 7, and refrigerant exit is connected with throttle part 8, and is also connected with the second heat exchanger 6 between compressor 7 and throttle part 8.
Concrete, First Heat Exchanger 5 is arranged in the flue 3 between wet desulfurizer 2 and chimney 4, First Heat Exchanger 5 is as the condenser of steam compression circulating system, flue gas is heated, First Heat Exchanger 5 outsides are flue gas, by refrigerant medium, in steam compression circulating system, move in circles, thereby realize the heat treated to flue gas.Here the condenser of mentioning refers to, refrigerant carries out condensation in heat exchanger, is become the liquid of high pressure by the gas of high pressure, discharges a large amount of heat, refers to that refrigerant release heat heats flue gas here.
In the present embodiment, heat exchanger is as the condenser in steam compression circulating system, and compressor is discharged the cold media gas of high pressure-temperature, and this cold media gas heats flue gas in condenser, when the flue-gas temperature after heating exceedes after its dew-point temperature, flue gas can condensation.Concrete, after wet type desulfurizing, the actual temperature of flue gas is t1=52 degree, but dew-point temperature is at that time t2=62 degree, also at flue gas moisture content, exceeded the water capacity of saturated moist air, need to be heated to and exceed dew-point temperature and just likely avoid above condensation.And, chimney is in the uphill process of transmission flue gas, outer wall meeting and the extraneous air of chimney carry out heat exchange, when vertical height is higher, the temperature of chimney outer air can reduce, so general, in condenser, can arrive certain temperature by heating flue gas, can be higher than the dew-point temperature t2 of 62 degree in the temperature t 3 of chimney outlet thereby guarantee, thereby avoid flue gas condensation in chimney, the minimum of the chimney outlet not temperature difference of the dew-point temperature t2 of condensation temperature T and flue gas is determined by building enclosure and the outside air temperature of chimney.Generally, in order to reduce the energy consumption of heating flue gas, adopt actual t2=T+ (3 to 10) degree, the condenser temperature of First Heat Exchanger 5 is 90 degree in the present embodiment, the actual temperature of flue gas after treatment is 70 degree, even thereby flue gas in chimney, lower the temperature, its temperature also can be higher than dew-point temperature.
Further, the refrigerant medium that the steam compression circulating system of the present embodiment adopts is CO2, and because First Heat Exchanger is higher as the actual temperature of condenser, the CO2 in First Heat Exchanger is supercriticality.The CO2 of supercriticality is doing when mobile in pipe, the impact of the proportion of temperature on CO2 is comparatively obvious, particularly in the situation that heat exchanger tube vertically arranges, the CO2 of the supercriticality after cooling can form pipe side wall and ducted phase double replacement, thereby in VERTICAL TUBE, form the situation of outside wall temperature interval variation, thereby improved heat transfer effect.Concrete, in the present embodiment, the refrigerant heat exchanger tube in First Heat Exchanger 5 adopts vertically and arranges, and the rib of the outer enhanced heat exchange of pipe is horizontally disposed with.
Embodiment bis-
The scheme of Fig. 2, be with the difference of embodiment mono-, First Heat Exchanger 5 is arranged in by-pass flue 11, carry out heat exchange with the flue gas in this by-pass flue 11, a part of flue gas carries out after heat exchange through the First Heat Exchanger 5 in by-pass flue 11, and the flue gas of processing is mixed into temperature higher than the not flue gas of condensation temperature T of minimum at meet 12 and another part flue gas.
In actual flue gas is processed, often adopt the heat treatment apparatus of customization, in order to adapt to the designing requirement of flue gas processing device, can only to partial fume, process, then the form of mixing, improved the flexibility that flue gas processing device arranges.For another example, when the equipment in another flue overhauls, the heat exchanger in by-pass flue just can be shouldered the work of heating flue gas.
Embodiment tri-
As shown in Figure 3, the difference of the present embodiment and embodiment mono-is, in steam compression circulating system, be also provided with cross valve 9, this cross valve 9 flows to and controls the refrigerant of First Heat Exchanger, when cross valve 9 flows as the flow direction in Fig. 3, First Heat Exchanger 5 is used as condenser, and flue gas processing device comprises first state of First Heat Exchanger as condenser; When cross valve 9 flows as the flow direction in Fig. 4, First Heat Exchanger 5 is used as evaporimeter, and flue gas processing device comprises second state of First Heat Exchanger as evaporimeter.
In the present embodiment, the function of the second heat exchanger also can be along with corresponding variation occurs in the switching of cross valve 9, and when the first state, the second heat exchanger 6 uses as evaporimeter; During the second state, the second heat exchanger 6 uses as condenser.In Fig. 3 or Fig. 4, the second heat exchanger 6 is air heat exchanger, and wherein heat exchanger comprises the heat exchange fan 10 that drives Air Flow.Understandable the second heat exchanger 6 can be also the combination of two or more the heat exchanger that can mutually switch, and only needs to switch to evaporimeter or condenser according to the demand of steam compression cycle.
When First Heat Exchanger is used as condenser, can be with reference to specific embodiment one; When First Heat Exchanger is used as evaporimeter, still, with the flue gas of 52 degree, the dew-point temperatures of 62 degree are example, and evaporimeter can directly condense away the moisture content in flue gas, thereby reduce dew-point temperature.In the present embodiment, the evaporating temperature of First Heat Exchanger is 15 degree, and the flue-gas temperature after cooling is 35 degree, and dew-point temperature is 35 degree; The flue gas of this state and in addition a part of untreated flue gas mix, and producing temperature is 43 degree, and dew-point temperature is the flue gas of 40 degree, because 43 degree have approached the temperature of extraneous air, so heat transfer temperature difference is little, can't in chimney, produce condensation.Under the second state, First Heat Exchanger is used as evaporimeter, situation when flue gas actual temperature after treatment will be far smaller than the first state, but, concrete energy consumption, also needs to consider the water capacity of flue gas, if water capacity is larger, because need latent heat to be processed is large, and need more energy consumption.
Embodiment tetra-
As shown in Figure 5, the difference of the present embodiment and embodiment mono-is, the second heat exchanger 6 is arranged in the flue 3 between wet desulfurizer 2 and First Heat Exchanger 5, and second outlet of heat exchanger 6 connecting joint stream units 8 and the suction inlet of compressor 7, used as evaporimeter.Through the flue gas of wet type desulfurizing, before this through the cool-down dehumidification of the second heat exchanger 6, the moisture in can condensation flue gas, reduces the absolute moisture content of flue gas; Flue gas after treatment passes through the wet heating such as grade of First Heat Exchanger 5 again, when improving flue-gas temperature, can significantly improve relative humidity, makes to be difficult for condensation in chimney.Because First Heat Exchanger and the second heat exchanger are the parts as vapor-compression cycle system, by a compressor, completed simultaneously to the cool-down dehumidification of flue gas and etc. wet heating, than one of them heat exchanger of independent use, can reduce significantly energy consumption.
Concrete, still take the initial temperature of flue gas as 52 degree, dew-point temperature is 62 degree, and evaporating temperature 15 is spent, and condensation temperature 90 degree are example, flue gas is reduced to 35 degree from 52 degree, by condenser again from being newly heated to 55 degree, because the dew-point temperature in this time only has 35 degree, so, can mix with more untreated flue gas, improve the amount of the flue gas of processing.Adopt form as shown in Figure 5, be the best a kind of form of result of use, flue gas had both been carried out to evaporimeter dehumidifying, carried out again the heating of condenser, use same energy (operation of drive compression machine), evaporation and two effects of condensation all can be to flue gas its effects that dehumidifies.Required energy should reduce more than 40% than mode above.And the temperature of outlet flue gas can significantly reduce, external thermal pollution minimum.
Claims (8)
1. a flue gas processing device, is characterized in that, described flue gas processing device is the steam compression circulating system that comprises First Heat Exchanger, and described First Heat Exchanger is arranged in the flue between wet desulfurizer and chimney;
Described First Heat Exchanger is as the condenser of steam compression circulating system.
2. flue gas processing device according to claim 1, it is characterized in that, the refrigerant entrance of described First Heat Exchanger is connected with throttle part, and the refrigerant exit of First Heat Exchanger is connected with compressor, and is also connected with the second heat exchanger between compressor and throttle part.
3. flue gas processing device according to claim 1, is characterized in that, the refrigerant medium that described steam compression circulating system adopts is CO
2, and the CO in described First Heat Exchanger
2for supercriticality.
4. flue gas processing device according to claim 3, is characterized in that, described First Heat Exchanger is arranged in exhaust gases passes, and the refrigerant heat exchanger tube of First Heat Exchanger is vertically to arrange.
5. flue gas processing device according to claim 1, is characterized in that, described First Heat Exchanger is arranged in a by-pass flue, and flue gas after treatment mixes with other flue gases at meet.
6. according to the flue gas processing device described in any one in claim 1 to 5, it is characterized in that, in described steam compression circulating system, be provided with cross valve, this cross valve flows to and controls the refrigerant of First Heat Exchanger;
Described steam compression circulating system comprises first state of First Heat Exchanger as evaporimeter;
Described steam compression circulating system comprises second state of First Heat Exchanger as condenser.
7. flue gas processing device according to claim 6, is characterized in that, the second heat exchanger in described steam compression circulating system is air heat exchanger, and under the first state status, the second heat exchanger is as condenser; Under the second state status, the second heat exchanger is evaporimeter.
8. according to the flue gas processing device described in any one in claim 1 to 5, it is characterized in that, in described steam compression circulating system, also have the second heat exchanger using as evaporimeter, this second heat exchanger is arranged in the flue between First Heat Exchanger and wet desulfurizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320758140.6U CN203571777U (en) | 2013-11-27 | 2013-11-27 | Flue gas treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320758140.6U CN203571777U (en) | 2013-11-27 | 2013-11-27 | Flue gas treatment device |
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| Publication Number | Publication Date |
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| CN203571777U true CN203571777U (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320758140.6U Withdrawn - After Issue CN203571777U (en) | 2013-11-27 | 2013-11-27 | Flue gas treatment device |
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| CN (1) | CN203571777U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154553A (en) * | 2013-11-27 | 2014-11-19 | 北京大学工学院包头研究院 | Flue gas treatment device |
| CN104154552A (en) * | 2013-11-27 | 2014-11-19 | 北京大学工学院包头研究院 | Flue gas treatment device |
| CN106678856A (en) * | 2017-01-10 | 2017-05-17 | 深圳市捷晶能源科技有限公司 | Flue gas refrigerant compression dehumidification system |
-
2013
- 2013-11-27 CN CN201320758140.6U patent/CN203571777U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154553A (en) * | 2013-11-27 | 2014-11-19 | 北京大学工学院包头研究院 | Flue gas treatment device |
| CN104154552A (en) * | 2013-11-27 | 2014-11-19 | 北京大学工学院包头研究院 | Flue gas treatment device |
| CN104154553B (en) * | 2013-11-27 | 2018-07-03 | 北京大学包头创新研究院 | A kind of flue gas processing device |
| CN106678856A (en) * | 2017-01-10 | 2017-05-17 | 深圳市捷晶能源科技有限公司 | Flue gas refrigerant compression dehumidification system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 014010 room B, block, management committee, equipment manufacturing park, Qingshan District, the Inner Mongolia Autonomous Region, China Patentee after: Packet header innovation research institute of Peking University Address before: 014010 room B, block, management committee, equipment manufacturing park, Qingshan District, the Inner Mongolia Autonomous Region, China Patentee before: BAOTOU RESEARCH INSTITUTE, COLLEGE OF ENGINEERING, PKU |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20140430 Effective date of abandoning: 20180703 |
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| AV01 | Patent right actively abandoned |