CN204142064U - A kind of flue gas heat-exchange unit - Google Patents
A kind of flue gas heat-exchange unit Download PDFInfo
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- CN204142064U CN204142064U CN201420561241.9U CN201420561241U CN204142064U CN 204142064 U CN204142064 U CN 204142064U CN 201420561241 U CN201420561241 U CN 201420561241U CN 204142064 U CN204142064 U CN 204142064U
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- flue
- flue gas
- exchange unit
- gas heat
- heat exchange
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 239000003546 flue gas Substances 0.000 title claims abstract description 83
- 239000004071 soot Substances 0.000 claims abstract description 45
- 238000004140 cleaning Methods 0.000 claims description 44
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 238000010926 purge Methods 0.000 description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 35
- 238000000034 method Methods 0.000 description 27
- 238000005406 washing Methods 0.000 description 21
- 230000003203 everyday effect Effects 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- 229910052602 gypsum Inorganic materials 0.000 description 5
- 239000010440 gypsum Substances 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 4
- 210000003298 dental enamel Anatomy 0.000 description 4
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000003442 weekly effect Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000013517 stratification Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model discloses a kind of flue gas heat-exchange unit, wherein, this flue gas heat-exchange unit comprises rotor (1), seal area (3), former flue (4) and clean flue (5), described former flue (4) and described clean flue (5) are separated by described seal area (3), (1) is provided with heat exchange element to described rotor, described former flue (4) and described clean flue (5) realize heat exchange by the heat exchange element on described rotor (1), hot junction and the cold junction of described former flue (4) are provided with at least one soot blower (11 separately, 12).The flue gas heat-exchange unit using the utility model to provide significantly can improve the security of desulphurization system equipment and improve the economy of desulphurization system operation, has a wide range of applications and promotional value.
Description
Technical field
The utility model relates to flue gas desulphurization system field, particularly, relates to a kind of new flue gas heat-exchange unit and on-line cleaning method thereof.
Background technology
Flue gas heat-exchange unit (GGH) is one of main device in flue gas desulphurization system.Its effect utilizes former flue gas to be heated by the neat stress after desulfurization, makes exhaust gas temperature reach on dew point, reduces pollutant levels, eliminates " gypsum rain " and " plume " phenomenon, alleviate the corrosion to clean flue and chimney; Reduce the flue-gas temperature entering absorption tower simultaneously, reduce in tower corrosion-resistant process specifications.
At present, in production, widely used GGH blow device and using method can not reach desirable purging and cleaning function.Along with the increase of service time, GGH heat exchange element can be easy to occur blocking because of dust stratification.GGH both sides flue gas differential pressure is caused to raise gradually, desulphurization system resistance rises, corrosion caused to flue and chimney and occurs " gypsum rain " and " plume " phenomenon, had a strong impact on the security of whole desulphurization system operation and increased maintenance and the operation and maintenance cost of desulphurization system.
In current GGH cleaning method, GGH manufacturing firm General Requirements strictly controls frequency of utilization and the washing time of water under high pressure, and washing time is generally 8 hours.Producer is thought: impurity and the water under high pressure hybrid reactions such as the gypsum that former flue gas carries, dust, form similar " cement " hard foulant, is difficult to remove.In addition, some power plant carries out the tackling of key scientific and technical problems that high-temperature steam is main purging, the powerful impact kinetic energy of high-temperature steam is utilized to remove the foulant of GGH, although alleviate GGH fouling and clogging phenomenon, but GGH heat exchange element can often be occurred by the situation of high-temperature steam blow loss, the life-span of equipment shortens dramatically, and cost is too high and power plant cannot accept.Current GGH pressure reduction height and fouling and clogging phenomenon seriously remain the universal phenomenon in power plant.
For improving GGH system long period safe and stable operation, this area is needed exploitation one badly and effectively can be solved structure blocking in GGH system, chimney corrosion and eliminate the flue gas heat-exchange unit of gypsum " plume " and the method for on-line cleaning.
Utility model content
The purpose of this utility model is to overcome the defect that effectively can not solve GGH fouling and clogging in existing flue gas heat-exchange unit and on-line cleaning method thereof, provides a kind of flue gas heat-exchange unit and the on-line cleaning method thereof that effectively can solve fouling and clogging.
To achieve these goals, on the one hand, the utility model provides a kind of flue gas heat-exchange unit, wherein, this flue gas heat-exchange unit comprises rotor, seal area, former flue and clean flue, and described former flue and described clean flue are separated by described seal area, and described rotor is provided with heat exchange element, described former flue and described clean flue realize heat exchange by described epitrochanterian heat exchange element, and hot junction and the cold junction of described former flue are provided with at least one soot blower separately.
On the other hand, the utility model provides a kind of on-line cleaning method of above-mentioned flue gas heat-exchange unit, and the method comprises: carry out high-temperature steam purging with the soot blower in hot junction and the soot blower in the hot junction that is optionally arranged at described clean flue that are arranged at described former flue to being arranged at described epitrochanterian heat exchange element; And carry out compressed air purging with the soot blower of cold junction and the soot blower of the cold junction that is optionally arranged at described clean flue being arranged at described former flue to being arranged at described epitrochanterian heat exchange element.
Hot junction and the cold junction of the former flue of the flue gas heat-exchange unit provided in the utility model arrange at least one soot blower separately, flue gas heat-exchange unit of the present utility model effectively can be removed the dust stratification on epitrochanterian heat exchange element and foulant etc., thus overcome the defect of the easy fouling and clogging of flue gas heat-exchange unit, there is longer service life, particularly, continuous cycle of operation of flue gas heat-exchange unit that the utility model provides reaches more than 18 months.
In addition, the on-line cleaning method of the flue gas heat-exchange unit using the utility model to provide, distinguishing purging is carried out to the heat exchange element of different piece on rotor, not only effectively can remove the dust stratification and foulant etc. on heat exchange element, and can not heat exchange element be damaged, thus reduce the fault rate of heat exchange element and the frequency of off-line cleaning, the continuous cycle of operation of flue gas heat-exchange unit is extended greatly, improves the security of desulphurization system equipment and the economy of desulphurization system operation.
Other feature and advantage of the present utility model are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for description, is used from explanation the utility model, but does not form restriction of the present utility model with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the flue gas heat-exchange unit of a kind of detailed description of the invention of the present utility model.
Fig. 2 is the flue gas heat-exchange unit of another kind of detailed description of the invention of the present utility model.
Description of reference numerals
1 rotor 2 shell
The former flue of 3 seal area 4
The former cigarette outlet of 41 former cigarette entrance 42
The clean cigarette entrance of 5 clean flues 51
52 clean cigarette outlet 11,12,13,14 soot blowers
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the utility model, is not limited to the utility model.
In the utility model, when not doing contrary explanation, term " hot junction " refers to the part that temperature is higher in the former flue and clean flue of flue gas heat-exchange unit, " cold junction " refers to the part that temperature is lower in the former flue and clean flue of flue gas heat-exchange unit, particularly, hot junction is the part near the neat stress outlet of part near the former smoke inlet of former flue and clean flue, and cold junction is the part near the neat stress entrance of part near the former exhanst gas outlet of former flue and clean flue.
On the one hand, the utility model provides a kind of flue gas heat-exchange unit, as shown in Figure 1, this flue gas heat-exchange unit comprises rotor 1, seal area 3, former flue 4 and clean flue 5, described former flue 4 is separated by described seal area 3 with described clean flue 5, described rotor 1 is provided with heat exchange element, and described former flue 4 realizes heat exchange with described clean flue 5 by the heat exchange element on described rotor 1, and the hot junction of described former flue 4 and cold junction are provided with at least one soot blower 11 and 12 separately.
In the utility model, described rotor 1 can be the rotor that this area routine uses, and comprises central shaft and cylindrical tube, and under preferable case, described rotor 1 stretches out from central shaft and rotor cylindrical shell is divided into 24 sectors, and the central angle of each sector is 15
°, comprise 14 heat exchange element boxes in each sector, described heat exchange element is assemblied in heat exchange element box.Described rotor 1 around central axis, in succession through former flue 4 and clean flue 5.Described heat exchange element can be the heat exchange element that this area routine uses, such as, can be the heat exchange element of compact corrugated plating (DU type, HS type etc.), major path through-type (L-type etc.).In order to reduce the fouling of heat exchange element and be convenient to the cleaning of heat exchange element, described heat exchange element all assembles in heat exchange element box.Described heat exchange element box can be the heat exchange element box that this area routine uses, such as corrugated boxes.
In the utility model, described rotor 1 slowly rotates around central shaft and makes heat exchange element successively through overheated former flue gas and cold neat stress.When heat exchange element is through former fume side, a part of heat that former flue gas carries just passes to heat exchange element; And when heat exchange element passes to neat stress through neat stress side heat.Like this, the heat that former flue gas carries just is reused and is used for increasing the neat stress temperature that will enter chimney, thus achieves heat exchange.
In the flue gas heat-exchange unit that the utility model provides, described former flue 4 is separated by described seal area 3 with described clean flue 5, described seal area 3 makes described rotor 1 can not leak gas former flue 4 and described clean flue 5 described in clean flue 5 rotation process from former flue 4 around center, and described gas leakage refers to that the neat stress that the former flue gas of former flue 4 enters clean flue 5 and/or clean flue 5 enters former flue 4.
According to the utility model, the flow direction through two strands of air-flows of former flue 4 and clean flue 5 is contrary, i.e. convection current.Such as, in FIG, the layout of air-flow can be under former flue gas flow direction, in the neat stress flow direction.Described former flue 4 is provided with former flue entrance 41 and former flue outlet 42; Described clean flue 5 is provided with clean flue entrance 51 and clean flue outlet 52.Described former flue entrance 41 is for receiving such as from the former flue gas in power plant, and described former flue outlet 42 leads to desulphurization system for discharging the former flue gas after cooling, reduces the flue-gas temperature entering desulfuration absorbing tower, reduces in tower corrosion-resistant process specifications; Described clean flue entrance 51 is for receiving the neat stress after desulfurization, and described clean flue outlet 52 is for discharging the neat stress after intensification.Neat stress after intensification, temperature reaches on dew point, alleviates the corrosion to flue and chimney, improves the diffusance of pollutant.
In the utility model, the soot blower being arranged at the hot junction of described former flue 4 and cold junction can be at least one separately, also can think one or more.Under preferable case, hot junction and the cold junction of described former flue 4 are provided with a soot blower separately.
In the utility model, in order to reduce the structure blocking of flue gas heat-exchange unit in operation further, improve the purging ability of flue gas heat-exchange unit, under preferable case, as shown in Figure 2, the hot junction of described clean flue 5 and cold junction are also provided with at least one soot blower 13 and 14 separately, also can think one or more.Under further preferable case, hot junction and the cold junction of described clean flue 5 are provided with a soot blower separately.
Described soot blower can be the soot blower that this area routine uses, and described soot blower can realize high-temperature steam and purge and compressed air purging.For the ease of operation, under preferable case, described soot blower is full retractable soot blower.
In the utility model, in order to reduce the structure blocking of flue gas heat-exchange unit further, under preferable case, the cold junction of described former flue 4 and/or the cold junction of clean flue 5 are also provided with at least one cleaning device, also can think one or more.Under further preferable case, the described cold junction of former flue 4 and the cold junction of clean flue 5 arrange a cleaning device separately.Described cleaning device is the cleaning device that this area routine uses, such as, can realize the cleaning device of high pressure water cleaning.
In the utility model, the size for described flue gas heat-exchange unit is not particularly limited, and can build according to the demand of reality.
On the other hand, the utility model additionally provides a kind of on-line cleaning method of above-mentioned flue gas heat-exchange unit, wherein, the method comprises: carry out high-temperature steam purging with the soot blower 11 in hot junction and the soot blower 13 in the hot junction that is optionally arranged at described clean flue 5 that are arranged at described former flue 4 to the heat exchange element be arranged on described rotor 1; And with the soot blower 12 of cold junction and the soot blower 14 of the cold junction that is optionally arranged at described clean flue 5 being arranged at described former flue 4, compressed air purging is carried out to the heat exchange element be arranged on described rotor 1.
In the utility model, each soot blower can control separately, also namely purges the high-temperature steam in the hot junction of former flue 4 and clean flue 5 and purges the compressed air of the cold junction of former flue 4 and clean flue 5, can carry out simultaneously, also can carry out separately.
According to the method that the utility model provides, in order to improve purging effect, under preferable case, the condition that described high-temperature steam purges comprises: the pressure of high-temperature steam is 0.5-2.0MPa, high-temperature steam temperature is 150-300 DEG C, and the flow of high-temperature steam is 20-80kg/min; The time that described high-temperature steam purges and frequency can be determined according to the ruuning situation of flue gas heat-exchange unit, such as, can carry out 2-3 high-temperature steam every day and purge, and within every 6-8 hour, carry out once, the time that each high-temperature steam purges is 2-3h.
According to the method that the utility model provides, purge effect to reduce the fouling and clogging problem of flue gas heat-exchange unit to improve further, the condition that described compressed air purges comprises: compressed-air actuated pressure is 500-900kPa, and compressed air require is 10-40m
3/ min; The time that described compressed air purges and frequency can be determined according to the ruuning situation of flue gas heat-exchange unit, such as, can carry out 6-8 second compression air every day and purge, and within every 2-3 hour, carry out once, the time that each compressed air purges is 2-3h.
In the utility model, the operation that described high-temperature steam purges and compressed air purges can be the method for operating of this area routine, such as, soot blower can be advanced former, clean flue inner, then starts to perform to purge and cleaning procedure.
In order to improve the effect of the on-line cleaning method that the utility model provides further, under preferable case, the method also comprises carries out high pressure water washing with the cleaning device of the cold junction being arranged at former flue 4 to the heat exchange element be arranged on described rotor 1, and carries out high pressure water washing with the cleaning device of the cold junction being arranged at clean flue 5 to the heat exchange element be arranged on described rotor 1.
In the utility model, in order to improve the effect of flushing, under preferable case, the pressure of the water under high pressure of described high pressure water washing is 8-40Mpa, and the flow of water under high pressure is 3-15m
3/ h.The time of described high pressure water washing and frequency can be determined according to the ruuning situation of flue gas heat-exchange unit, such as, carry out weekly 1-2 sub-high pressure water and rinse; Due to the magazine hybrid reaction such as gypsum, dust that water under high pressure and former flue gas carry, form hard foulant, be difficult to remove, the manufacturing firm of flue gas heat-exchange unit requires the strict restriction controlling water under high pressure, general washing time is 8 hours, and in the utility model, utility model people breaks through the restriction that producer strictly controls water under high pressure, by more than the time lengthening to 24 of high pressure water washing hour, obtain the effect of good flushing and softening foulant.
As shown in Figure 2, flue gas heat-exchange unit according to a kind of detailed description of the invention of the present utility model can comprise rotor 1, seal area 3, former flue 4 and clean flue 5, described former flue 4 is separated by described seal area 3 with described clean flue 5, described rotor 1 is provided with heat exchange element, described former flue 4 realizes heat exchange with described clean flue 5 by the heat exchange element on described rotor 1, the hot junction of described former flue 4 and cold junction are provided with a soot blower 11 separately, 12, the hot junction of described clean flue and cold junction are provided with a soot blower 13 separately, 14, the cold junction of described former flue 4 and clean flue 5 is also provided with a cleaning device separately.
According to the utility model, a kind of on-line cleaning method of above-mentioned flue gas heat-exchange unit can comprise: carry out high-temperature steam purging with the soot blower 11 in hot junction and the soot blower 13 in the hot junction that is arranged at described clean flue 5 that are arranged at described former flue 4 to the heat exchange element be arranged on described rotor 1, the condition that described high-temperature steam purges can comprise: the pressure of high-temperature steam is 0.5-2.0MPa, the temperature of high-temperature steam is 150-300 DEG C, and the flow of high-temperature steam is 20-80kg/min; With the soot blower 12 of cold junction and the soot blower 14 of the cold junction that is arranged at described clean flue 5 that are arranged at described former flue 4, compressed air purging is carried out to the heat exchange element be arranged on described rotor 1, the condition that described compressed air purges can comprise: compressed-air actuated pressure is 500-900kPa, and compressed air require is 10-40m
3/ min; And with the cleaning device of the cold junction being arranged at former flue 4, high pressure water washing is carried out to the heat exchange element be arranged on described rotor 1, with with the cleaning device of the cold junction being arranged at clean flue 5, high pressure water washing is carried out to the heat exchange element be arranged on described rotor 1, the pressure of the water under high pressure of described high pressure water washing is 8-40Mpa, and the flow of water under high pressure is 3-15m
3/ h.
Below will be described in detail the utility model by embodiment.
Embodiment 1
The present embodiment is for illustration of the on-line cleaning method of flue gas heat-exchange unit described in the utility model and this flue gas heat-exchange unit.
Flue gas heat-exchange unit in the present embodiment as shown in Figure 1, this flue gas heat-exchange unit can comprise rotor 1, seal area 3, former flue 4 and clean flue 5, described former flue 4 is separated by described seal area 3 with described clean flue 5, described rotor 1 is provided with heat exchange element, described former flue 4 realizes heat exchange with described clean flue 5 by the heat exchange element on described rotor 1, the hot junction of described former flue 4 and cold junction are provided with a soot blower 11 separately, 12, the cold junction of described former flue 4 and clean flue 5 is also provided with a cleaning device separately.
Described flue gas heat-exchange unit and desulphurization system are carried out coupling and are connected, and run continuously.
On-line cleaning method of the present utility model is adopted to carry out the on-line cleaning of flue gas heat-exchange unit: to carry out high-temperature steam purging with the soot blower 11 in the hot junction being arranged at described former flue 4 to the heat exchange element be arranged on described rotor 1, the condition that described high-temperature steam purges can comprise: the pressure of high-temperature steam is 1.0MPa, high-temperature steam temperature is 230 DEG C, the flow of high-temperature steam is 80kg/min, described high-temperature steam purges every 6 hours and purges once, the time of each purging is 2h, every day 3 times; Carry out compressed air purging with the soot blower 12 of the cold junction being arranged at described former flue 4 to the heat exchange element be arranged on described rotor 1, the condition that described compressed air purges can comprise: compressed-air actuated pressure is 780kPa, and compressed air require is 10m
3/ min, described compressed air purges every 2 hours and purges once, and each time purged is 2h, every day 8 times.
Flue gas heat-exchange unit runs 18 months continuously, and do not find that heat exchange element damages phenomenon, and flue gas heat-exchange unit fouling and clogging phenomenon is slight, heat exchange element surface energy is shown in enamel true qualities.
Embodiment 2
According to the flue gas heat-exchange unit in embodiment 1, unlike, the cold junction of described former flue 4 and clean flue 5 is also provided with a cleaning device separately.
Described flue gas heat-exchange unit and desulphurization system are carried out coupling and are connected, and run continuously.
On-line cleaning method of the present utility model is adopted to carry out the on-line cleaning of flue gas heat-exchange unit: to carry out high-temperature steam purging with the soot blower 11 in the hot junction being arranged at described former flue 4 to the heat exchange element be arranged on described rotor 1, the condition that described high-temperature steam purges can comprise: the pressure of high-temperature steam is 2.0MPa, high-temperature steam temperature is 150 DEG C, the flow of high-temperature steam is 20kg/min, described high-temperature steam purges every 8 hours and purges once, the time of each purging is 2h, every day 2 times; Carry out compressed air purging with the soot blower 12 of the cold junction being arranged at described former flue 4 to the heat exchange element be arranged on described rotor 1, the condition that described compressed air purges can comprise: compressed-air actuated pressure is 900kPa, and compressed air require is 20m
3/ min, described compressed air purges every 3 hours and purges once, and each time purged is 2h, purges 6 every day; And with the cleaning device of the cold junction being arranged at former flue 4, high pressure water washing is carried out to the heat exchange element be arranged on described rotor 1, with with the cleaning device of the cold junction being arranged at clean flue 5, high pressure water washing is carried out to the heat exchange element be arranged on described rotor 1, the pressure of the water under high pressure of described high pressure water washing is 10Mpa, and the flow of water under high pressure is 8.6m
3/ h, described high pressure water washing carries out 2 times weekly, carries out 36h at every turn.
Flue gas heat-exchange unit runs 18 months continuously, and do not find that heat exchange element damages phenomenon, heat exchange element surface energy is shown in enamel true qualities.
Embodiment 3
The flue gas heat-exchange unit of the present embodiment as shown in Figure 2, this flue gas heat-exchange unit can comprise rotor 1, seal area 3, former flue 4 and clean flue 5, described former flue 4 is separated by described seal area 3 with described clean flue 5, described rotor 1 is provided with heat exchange element, described former flue 4 realizes heat exchange with described clean flue 5 by the heat exchange element on described rotor 1, the hot junction of described former flue 4 and cold junction are provided with a soot blower 11 separately, 12, the hot junction of described clean flue and cold junction are provided with a soot blower 13 separately, 14, the cold junction of described former flue 4 and clean flue 5 is also provided with a cleaning device separately.
Described flue gas heat-exchange unit and desulphurization system are carried out coupling and are connected, and run continuously.
On-line cleaning method of the present utility model is adopted to carry out the on-line cleaning of flue gas heat-exchange unit: to carry out high-temperature steam purging with the soot blower 11 in hot junction and the soot blower 13 in the hot junction that is arranged at described clean flue 5 that are arranged at described former flue 4 to the heat exchange element be arranged on described rotor 1, the condition that described high-temperature steam purges is: the pressure of high-temperature steam is 0.5MPa, high-temperature steam temperature is 300 DEG C, the flow of high-temperature steam is 50kg/min, described high-temperature steam purges every 7 hours and purges once, the time of each purging is 3h, every day 3 times; With the soot blower 12 of cold junction and the soot blower 14 of the cold junction that is arranged at described clean flue 5 that are arranged at described former flue 4, compressed air purging is carried out to the heat exchange element be arranged on described rotor 1, the condition that described compressed air purges is: compressed-air actuated pressure is 500kPa, and compressed air require is 40m
3/ min, described compressed air purges every 3 hours and purges once, and each time purged is 3h, purges 7 every day; And with the cleaning device of the cold junction being arranged at former flue 4, high pressure water washing is carried out to the heat exchange element be arranged on described rotor 1, with with the cleaning device of the cold junction being arranged at clean flue 5, high pressure water washing is carried out to the heat exchange element be arranged on described rotor 1, the pressure of the water under high pressure of described high pressure water washing is 40Mpa, and the flow of water under high pressure is 15m
3/ h, described high pressure water washing carries out 1 time weekly, carries out 24h at every turn.
Flue gas heat-exchange unit runs 18 months continuously, and do not find that heat exchange element damages phenomenon, heat exchange element surface energy is shown in enamel true qualities.
Embodiment 4
Use the flue gas heat-exchange unit of embodiment 3, and clean according to the on-line cleaning method of embodiment 3, unlike, the pressure of the water under high pressure of described high pressure water washing is 28Mpa, and the flow of water under high pressure is 5m
3/ h, described high pressure water washing carries out 1 time weekly, carries out 35h at every turn.
Flue gas heat-exchange unit runs 18 months continuously, and do not find that heat exchange element damages phenomenon, heat exchange element surface energy is shown in enamel true qualities.
As can be seen from embodiment 1-4, the flue gas heat-exchange unit that the utility model provides and on-line cleaning method thereof significantly can improve the security of flue gas heat-exchange unit and the economy of flue gas heat-exchange unit operation, particularly, the flue gas heat-exchange unit continuous cycle of operation is increased to more than 18 months, and flue gas heat-exchange unit heat exchange element does not damage phenomenon; Fouling and clogging phenomenon is slight, and SR reduces, and desulfurization power consumption declines about 0.1-0.2%; Reduce the off-line Chemical cleaning of equipment fault probability and heat exchange element, overhaul of the equipments and operation and maintenance cost about 500,000 yuan can be saved every year.
Thus, the flue gas heat-exchange unit using the utility model to provide and on-line cleaning method thereof significantly can improve the security of desulphurization system equipment and improve the economy of desulphurization system operation, have a wide range of applications and promotional value.
Below preferred embodiment of the present utility model is described by reference to the accompanying drawings in detail; but; the utility model is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the utility model illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (4)
1. a flue gas heat-exchange unit, it is characterized in that, this flue gas heat-exchange unit comprises rotor (1), seal area (3), former flue (4) and clean flue (5), described former flue (4) and described clean flue (5) are separated by described seal area (3), (1) is provided with heat exchange element to described rotor, described former flue (4) and described clean flue (5) realize heat exchange by the heat exchange element on described rotor (1), the hot junction of described former flue (4) and cold junction are provided with at least one soot blower (11,12) separately.
2. flue gas heat-exchange unit according to claim 1, is characterized in that, the hot junction of described clean flue (5) and cold junction are provided with at least one soot blower (13,14) separately.
3. flue gas heat-exchange unit according to claim 1 and 2, is characterized in that, described soot blower is full retractable soot blower.
4. flue gas heat-exchange unit according to claim 1, is characterized in that, the cold junction of described former flue (4) and the cold junction of clean flue (5) also arrange at least one cleaning device separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420561241.9U CN204142064U (en) | 2014-09-26 | 2014-09-26 | A kind of flue gas heat-exchange unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420561241.9U CN204142064U (en) | 2014-09-26 | 2014-09-26 | A kind of flue gas heat-exchange unit |
Publications (1)
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|---|---|
| CN204142064U true CN204142064U (en) | 2015-02-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315908A (en) * | 2014-09-26 | 2015-01-28 | 中国神华能源股份有限公司 | Flue gas heat exchanger and online cleaning method thereof |
| CN104880123A (en) * | 2015-04-22 | 2015-09-02 | 大唐淮北发电厂 | Method for treating ash deposition and scaling of GGH (gas-gas heater) |
-
2014
- 2014-09-26 CN CN201420561241.9U patent/CN204142064U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315908A (en) * | 2014-09-26 | 2015-01-28 | 中国神华能源股份有限公司 | Flue gas heat exchanger and online cleaning method thereof |
| CN104880123A (en) * | 2015-04-22 | 2015-09-02 | 大唐淮北发电厂 | Method for treating ash deposition and scaling of GGH (gas-gas heater) |
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