CN102128445B - Method, device and system for recycling moisture and latent heat of vaporization in lignite smoke - Google Patents
Method, device and system for recycling moisture and latent heat of vaporization in lignite smoke Download PDFInfo
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- CN102128445B CN102128445B CN201010000696A CN201010000696A CN102128445B CN 102128445 B CN102128445 B CN 102128445B CN 201010000696 A CN201010000696 A CN 201010000696A CN 201010000696 A CN201010000696 A CN 201010000696A CN 102128445 B CN102128445 B CN 102128445B
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- 239000003077 lignite Substances 0.000 title claims abstract description 47
- 238000009834 vaporization Methods 0.000 title claims abstract description 33
- 230000008016 vaporization Effects 0.000 title claims abstract description 33
- 239000000779 smoke Substances 0.000 title abstract description 7
- 238000004064 recycling Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 title description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 108
- 238000010438 heat treatment Methods 0.000 claims abstract description 53
- 239000000428 dust Substances 0.000 claims abstract description 10
- 239000003546 flue gas Substances 0.000 claims description 67
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 64
- 238000011084 recovery Methods 0.000 claims description 27
- 239000002352 surface water Substances 0.000 claims description 13
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 7
- 238000010926 purge Methods 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 239000002244 precipitate Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 210000003298 dental enamel Anatomy 0.000 claims description 2
- 238000009833 condensation Methods 0.000 abstract description 4
- 230000005494 condensation Effects 0.000 abstract description 4
- 206010022000 influenza Diseases 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 13
- 239000003245 coal Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000000247 postprecipitation Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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Abstract
The invention provides a system for recycling moisture and latent heat of vaporization in lignite smoke. The system comprises a boiler, a heater, a steam engine, an air preheater, a dust catcher and a chimney, wherein the heater is connected with the boiler and the steam engine through water pipes; the boiler and the steam engine are connected through a steam pipeline; and the boiler, the air preheater, the dust catcher and the chimney are connected through flues. The system also comprises a latent heat recoverer, wherein the latent heat recoverer is connected between the outlet of the dust catcher and the inlet of the chimney, and is used for absorbing the smoke heat discharged by the dust catcher; and the latent heat recoverer is connected between the water side outlet of the steam engine and the inlet of the heater through water pipes, and is used for heating the condensation water or heat supply network back water discharged by the steam engine through the absorbed heat.
Description
Technical field
The present invention specifically, is recovery method, the Apparatus and system about the moisture and the latent heat of vaporization in a kind of brown coal flue gas about the brown coal field of combustion technology.
Background technology
Brown coal are the most shallow coals of colliery degree, account for about 12% of national coal reserves, will become the main source of China's energy.
As shown in Figure 1; Structural representation for brown coal combustion system in the prior art; The wherein boiler 103 hot water evaporation of brown coal that be used to burn so that a series of heaters 102 were heated; And the steam that is heated into HTHP delivers to steam turbine 101 acting, and the condensed cold water of the steam discharge of steam turbine 101 is sent boiler 103 back to after through heater 102 heating; Simultaneously, the boiler 103 coal-fired flue gases that produce are discharged by chimney 106 through air preheater 104 and deduster 105.
Wherein, because the brown coal water content is very big, so need be dried before the burning, being about to water evaporates is water vapour.And a large amount of heat that this process need absorbs, the heat of this part absorption is all lost along with boiler 103 smoke evacuations, causes boiler efficiency (ASME method) lower.
Therefore, if can reclaim this part heat and water, the effect that, precipitation energy-conservation to the power plant consumes, raises the efficiency will be very surprising.
Summary of the invention
In order to solve the lower defective of brown coal combustion system efficient in the prior art, the invention provides recovery method, the Apparatus and system of moisture and the latent heat of vaporization in a kind of brown coal flue gas.
On the one hand; The present invention provides the recovery system of moisture and the latent heat of vaporization in a kind of brown coal flue gas; This system comprises: be connected through water pipe between boiler, heater, steam turbine, air preheater, deduster and the chimney, said heater and boiler and steam turbine, connect through steam pipeline between said boiler and the steam turbine; Said boiler, air preheater, deduster and chimney are connected through flue, and said system also comprises: latent heat recover, heat supply network latent heat recover; Said latent heat recover is connected in through flue between the inlet of outlet and said chimney of said deduster, is used to absorb the heat that said deduster is discharged flue gas; Said latent heat recover also is connected between the inlet of water side outlet and said heater of said steam turbine through water pipe; Be used for condensate through the said steam turbine discharge of the heat that absorbs; Said heat supply network latent heat recover through flue be connected in said latent heat recover and the inlet of outlet and said chimney between; Be connected in heat network system through water pipe, be used to absorb the heat that said latent heat recover is discharged flue gas, and the heat that absorbs is delivered to said heat network system through water pipe.
On the other hand, the present invention provides a kind of latent heat recover, and this latent heat recover is connected in through flue between the inlet of outlet and chimney of the deduster in the brown coal combustion system, is used to absorb the heat that said deduster is discharged flue gas; Said latent heat recover also is connected between the inlet of water side outlet and heater of the steam turbine in the brown coal combustion system through water pipe, is used for the condensate of discharging through the said steam turbine of the heat that absorbs; This latent heat recover comprises: panel-pipe of heating surface; Be arranged in the flue of said latent heat recover and be connected between the inlet of water side outlet and heater of steam turbine through water pipe; Be used for that said deduster is discharged flue gas and cool off, and pass through the condensate of the said steam turbine discharge of heat of cooled flue gas absorption so that the steam of flue gas is condensed into water; The heating surface water collector is arranged at said panel-pipe of heating surface below, is used to collect the water that said flue gas cooling back produces.
Beneficial effect of the present invention is, through increasing the latent heat recover in moisture in brown coal and the latent heat of vaporization recovery system, has reclaimed heat and the water in the flue gas, has realized energy-saving and emission-reduction.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the brown coal combustion system that Fig. 1 provides for prior art;
Fig. 2 is the structural representation of the recovery system of moisture and the latent heat of vaporization in the brown coal flue gas provided by the invention;
Fig. 3 is the structural representation of the recovery system of moisture and the latent heat of vaporization in the brown coal flue gas provided by the invention;
Fig. 4 is the structural representation of latent heat recover provided by the invention;
Fig. 5 is the structural representation of latent heat recover provided by the invention;
The structural representation of therrmodynamic system in the brown coal unit that Fig. 6 provides for prior art;
The structural representation of the recovery system of the moisture and the latent heat of vaporization in Fig. 7 brown coal flue gas provided by the invention;
Fig. 8 is the recovery method flow chart of moisture and the latent heat of vaporization in the brown coal flue gas provided by the invention.
The specific embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Embodiment one
As shown in Figure 2; Structural representation for moisture and latent heat of vaporization recovery system in the brown coal flue gas provided by the invention; Moisture and latent heat of vaporization recovery system comprise in this brown coal flue gas: boiler 203, heater 202, steam turbine 201, air preheater 204, deduster 205 and chimney 206; Be connected through water pipe between said heater and boiler and the steam turbine; Connect through steam pipeline between said boiler and the steam turbine, said boiler, air preheater, deduster and chimney are connected through flue, and said system also comprises: the latent heat recover;
Said latent heat recover is connected in through flue between the inlet of outlet and said chimney of said deduster, is used to absorb the heat that said deduster is discharged flue gas;
Said latent heat recover also is connected between the inlet of water side outlet and said heater of said steam turbine through water pipe, is used for the condensate of discharging through the said steam turbine of the heat that absorbs.
In the present embodiment,, realized recovery, reached the effect of energy-saving and emission-reduction the heat in the flue gas through increasing the latent heat recover in traditional brown coal combustion system.
Embodiment two
As shown in Figure 3; Structural representation for moisture and latent heat of vaporization recovery system in the brown coal flue gas provided by the invention; Wherein, condenser 301 is connected in the low-temperature receiver end of steam turbine low pressure (LP) cylinder LP, is used for the steam of steam turbine low pressure (LP) cylinder outlet is condensed into water; Vapour volume die-offs in this process, has kept the pressure differential of high steam;
Latent heat recover 303 is connected in through flue between the inlet of outlet and hair-dryer 315 of deduster 314, is used to absorb the heat that said deduster 314 is discharged flue gases; Said latent heat recover 303 also is connected between the inlet of said outlet of coagulating pump 302 and oxygen-eliminating device 304 through water pipe, is used for coagulating the condensate that pump 302 is discharged through the heat that absorbs is said.
Oxygen-eliminating device 304, feed pump 305, high-pressure heater 306～308 have been formed the heating system step by step in the native system; At this step by step in the heating system; If than certain one-level heater more high pressure heater draw gas condense into water after; The pressure of its this level of pressure ratio is also high, in the hydrophobic heater that is pressed onto lower pressure that at this moment pressure differential is condensed in will the heater with high pressure, is called gravity flow step by step.
Wherein, Oxygen-eliminating device 304 is connected with steam turbine intermediate pressure cylinder IP, latent heat recover 303 and feed pump 305; Be used for through the drawing gas of steam turbine intermediate pressure cylinder IP, the feedwater that latent heat recover 303 is sent here, and high-pressure heater 306 is heated to 150 ~ 180 ℃ from the water that flow to oxygen-eliminating device 304.Oxygen-eliminating device 304 tops are designed with an osculum simultaneously, are used for making the minor amounts of oxygen that is dissolved in water together to be discharged in the atmosphere with steam and go.
High-pressure heater 306～308 is connected with steam turbine high pressure cylinder HP respectively, is heated to higher temperature through drawing gas of steam turbine high pressure cylinder HP with the feedwater that feed pump 305 is got.
In boiler; The hot water that high-pressure heater 308 is discharged is through economizer 309; Evaporimeter 310 and superheater 311 become steam, are delivered to steam turbine high pressure cylinder HP acting, and the steam discharge of high pressure cylinder HP is delivered to intermediate pressure cylinder IP acting after heating once more through the reheater 312 in the boiler.
Simultaneously, the flue gas that the burning brown coal produce by behind the latent heat recover 303 recovery heats, blows to smoke stack emission through induced-draught fan 315 after air preheater 313, deduster 314 are handled again.
Wherein, As shown in Figure 4; Said latent heat recover 303 further comprises: panel-pipe of heating surface 401; Be arranged in the flue of said latent heat recover and be connected between the inlet of water side outlet and heater of the steam turbine in the brown coal combustion system, be used for that said deduster is discharged flue gas and cool off so that the steam of flue gas is condensed into water through water pipe, and the condensate of discharging through the said steam turbine of heat that cooled flue gas absorbs; Heating surface water collector 402 is arranged at said panel-pipe of heating surface below, is used to collect the water that said flue gas cooling back produces;
Also can comprise water pump 403, be connected in said heating surface water collector and water pipe, be used for described water is transported to water pipe.
In the present embodiment,, realized recovery, reached the effect of energy-saving and emission-reduction the heat in the flue gas through in traditional boiler using brown coal, increasing the latent heat recover.
Embodiment three
As shown in Figure 5; The sectional structure chart of a kind of latent heat recover that provides for the embodiment of the invention; Wherein, panel-pipe of heating surface 502 connects on steam turbine condensate line or the heat exchangers for district heating pipeline, and is arranged in the flue 501 of said latent heat recover; Be used for that said deduster is discharged flue gas and cool off so that the steam of flue gas is condensed into water, thus absorbed the heat in the flue gas with in the heating panel-pipe of heating surface 502 from the water of steam turbine condensate line or heat exchangers for district heating pipeline; In a preferred version, panel-pipe of heating surface can be designed to the heat pipe form, also can be designed to conventional coiled pipe.Simultaneously, for anticorrosion, the base material of panel-pipe of heating surface is an ordinary carbon steel, and outer wall need plate enamel, and the transverse pitch of pipe is greater than 50mm simultaneously.
Wherein, flue 501 contains sour workspace owing to being operated in, so need inside to add anticorrosion process.
Heating surface water collector 503 is a sagging awl bucket, and the condensation flow on panel-pipe of heating surface 502 surfaces are in this water collector.
Wherein, if being used for the latent heat of the flue gas of fuel such as natural gas, reclaims by above-mentioned latent heat recover, because dust seldom, so can cancel agitating device.
Heating surface tube purging device 508 is by forming with the scavenging conduit of some small-bores on the long pipeline, and under the effect of elevated pressures, current can wash the outer surface of described panel-pipe of heating surface 502, prevent grey stick on top.
In the above-described embodiments, after the higher hot cigarette of water content gets into heater, receive the surface condensation Cheng Shui of cooling, 503 li of the heating surface water collectors below flowing at panel-pipe of heating surface 502.Stirring the maintenance dust through agitator 504 in the heating surface water collector 503 does not precipitate; And be driven in the heating surface tube purging device 508 by water pump 505; Heating surface tube purging device 508 can form thin current at a high speed; The heating surface surface is cleaned, and accelerated the cooling of flue gas, be brought into the heat in the part of smoke in the water.After the liquid level in the water collector was higher than certain certain value, first control gate 506 was opened, and more recycle-waters was sent to sedimentation basin and recycled.
Because the amount of the latent heat of vaporization is very big; The latent heat of vaporization that the water vapour of 1kg evaporates under normal pressure is about 2500kJ/kg; Like this, if moisture is high in the flue gas, through said apparatus can reclaim moisture in a large amount of low-temperature zone flue gases with the latent heat of vaporization and moisture.With typical China triumph coalfield brown coal is example, if can all reclaim heat and moisture content, and the recyclable caloric value that is equivalent to coal itself 10% of then every t coal; 0.34t water, the exhaust gas volumn volume reduces 17%, one 600MW unit oepration at full load 1 hour simultaneously; With consuming such 400t coal, the heat of recovery just is equivalent to the 40t coal, 130t water; Will be to the energy-saving and emission-reduction of China, particularly there is huge meaning the water-deficient area, the Northwest, and this coal Value Data is as shown in table 1:
| Project | Symbol | Unit | Check coal |
| Total moisture | Mar | % | 34.1 |
| Air-dried moisture | Mad | % | 19.56 |
| The As-received ash content | Aar | % | 15.58 |
| The dry ash free basis fugitive constituent | Vdaf | % | 44.37 |
| As-received carbon | Car | % | 34.83 |
| As-received hydrogen | Har | % | 2.89 |
| As-received oxygen | Oar | % | 10.79 |
| As-received nitrogen | Nar | % | 0.71 |
| The full sulphur of As-received | St.ar | % | 1.1 |
| The As-received low heat valve | Qnet.ar | kJ/kg | 12900 |
| The As-received high calorific power | Qnet.gw | kJ/kg | 14280 |
| The latent heat of vaporization that 1kg walks in the ribbing | Qqr | kJ/kg | 1380 |
| Reclaim heat and be equivalent to the raw coal heat | Qhs | % | 11 |
| Theoretical dry air amount | V0 | Nm 3/kg | 3.5264 |
| Theoretical dry flue gas amount | V0y | Nm 3/kg | 3.4457 |
| The smoke evacuation excess air coefficient | αpy | _ | 1.4 |
| The dry flue gas amount | Vgy | Nm3/kg | 4.8562 |
| Water vapour volume in the flue gas | VH2O | Nm3/kg | 0.8245 |
| Flue gas reduces ratio | VH2O/Vgy | % | 17 |
| The callable moisture weight of 1kg coal | GH2O | kg/kg | 0.34 |
The typical high-moisture brown coal of table 1 parameter
Embodiment four
At present general unit thermodynamic system is as shown in Figure 6, is made up of 8 grades of heaters, heats condenser with drawing gas and comes water, makes the latent heat of vaporization of this part steam can't help condensing with minimizing and takes away, but get back to boiler, thereby play energy-conservation effect, wherein h
1-h
8Be the enthalpy of bleeding, h
W0-h
W8Be feedwater enthalpy, h
S1-h
S4, h
S6-h
S8Be hydrophobic enthalpy.
With certain 600MW supercritical unit is example, and under the rated load, main stripping temperature is 24Pa; Main stripping temperature is 566 ℃, and main steam flow amount is 1755t/h, 41 ℃ of condenser temperatures; The saturated vapor enthalpy is 2575kJ/kg under this temperature, and the saturation water enthalpy is 171kJ/kg, and the parameter that each section heater draws gas is as shown in table 2:
Table 2
In order to save the steam that heat regenerative system is used for heated feed water, make it be used for acting, replace these to draw gas with the fume afterheat behind the deduster, and reclaim the moisture in the high-moisture flue gas.With the heating system calculation of parameter that above-mentioned 600MW steam turbine is a sample design, can replace 1 ~ 4 section to draw gas, the acting ability that every 1kg increases is the flow weighted averages of acting ability of drawing gas that are heated at different levels, that is:
1 ~ 4 section acting ability=∑ amount of drawing gas of drawing gas * (enthalpy-exhaust enthalpy draws gas)
This patent design can get every resulting income of 1kg Steam Recovery heat (merit) and is 37kJ (shown in the table 3) thus.With respect to unit shown in Figure 6; The unit that the embodiment of the invention provides is imported under the constant situation of heat (also importing steam turbine 1755t/h steam) at boiler; Per hour multiple electric weight is: 37*1755*1000=65MJ, and being equivalent to generator power has increased 65/3.6=18MW, and 3%.
Table 3
Match and to find with the brown coal of high-moisture shown in the table 1: if the latent heat of vaporization of brown coal all reclaims; It is equivalent to low heat valve increases by 11%; And said system can only reclaim 3%; Thereby high-moisture brown coal unit also is not enough to all reclaim these heats with such Steam Turbine, must be used again.Because the restriction of temperature, reclaim these heats with steam turbine and be difficult to so that allowance to be arranged again, thereby want to utilize these heats, must be arranged on the outer part of therrmodynamic system to heater.
As shown in Figure 7; Structural representation for moisture and latent heat of vaporization recovery system in the brown coal flue gas provided by the invention; Moisture and latent heat of vaporization recovery system comprise in these brown coal: condenser 301, coagulate pump 302, latent heat recover 303, oxygen-eliminating device 304, feed pump 305, high-pressure heater 306～308, economizer 309, evaporimeter 310, superheater 311, reheater 312, air preheater 313, deduster 314, hair-dryer 315 and chimney.Comprise in addition:
Heat supply network latent heat recover 316; Through flue be connected in said latent heat recover and the inlet of outlet and said chimney between; Be connected in heat network system through water pipe, be used to absorb the heat that said latent heat recover is discharged flue gas, and the heat that absorbs is delivered to said heat network system through water pipe.
The internal structure of said heat supply network latent heat recover 316 is identical with latent heat recover 303, and its delivery port and water inlet are connected in heat network system, through increasing heat supply network latent heat recover 316; Supply the heating backwater; Because the temperature of backwater is very low, its utilization for heat is a magnanimity, will require also not high to temperature; Also it doesn't matter than exhaust gas temperature height even leaving water temperature requires; Can further heat the water of this heater outlet (the outlet water temperature does not satisfy the heat supply requirement), or directly pass out to heat supply network (the outlet water temperature satisfies the heat supply requirement), reach and reclaim all latent heats of vaporization.
Embodiment five
As shown in Figure 8, reclaim the method for the latent heat of vaporization and moisture in a kind of brown coal flue gas that provides for the embodiment of the invention in moisture and the latent heat of vaporization recovery system, this method comprises:
Step 801 absorbs the heat of the flue gas that deduster is discharged in the moisture and latent heat of vaporization recovery system in the said brown coal flue gas;
Step 802 is through steam turbine condensate in moisture and the latent heat of vaporization recovery system in the said brown coal of heat that absorb.
The heat of the flue gas that in an embodiment of the present invention, deduster is discharged in moisture and the latent heat of vaporization recovery system in the said brown coal flue gas of said absorption comprises:
Said deduster is discharged flue gas to be cooled off so that the steam in the flue gas is condensed into water.
The detailed process of above-mentioned steps is similar with aforementioned means embodiment, repeats no more at this, through reclaiming the moisture and the latent heat of vaporization in the brown coal flue gas, has reached the effect of energy-saving and emission-reduction.
It will be appreciated by those skilled in the art that accompanying drawing is the sketch map of a preferred embodiment, unit in the accompanying drawing or flow process might not be that embodiment of the present invention is necessary.The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
Above embodiment is the preferred embodiments of the disclosure, and the common variation that the those skilled in the art carries out in the technical scheme of the embodiment of the invention, change or replacement all should be included within protection scope of the present invention.
Claims (8)
1. the recovery system of the moisture and the latent heat of vaporization in the brown coal flue gas; This system comprises: boiler, heater, steam turbine, air preheater, deduster and chimney; Be connected through water pipe between said heater and boiler and the steam turbine, connect through steam pipeline between said boiler and the steam turbine, said boiler, air preheater, deduster and chimney are connected through flue; It is characterized in that said system also comprises: latent heat recover, heat supply network latent heat recover;
Said latent heat recover is connected in through flue between the inlet of outlet and said chimney of said deduster, is used to absorb the heat that said deduster is discharged flue gas;
Said latent heat recover also is connected between the inlet of water side outlet and said heater of said steam turbine through water pipe, is used for the condensate of discharging through the said steam turbine of the heat that absorbs;
Said heat supply network latent heat recover is connected in through flue between the inlet of outlet and said chimney of said latent heat recover; Be connected in heat network system through water pipe; Be used to absorb the heat that said latent heat recover is discharged flue gas, and the heat that absorbs is delivered to said heat network system through water pipe.
2. moisture and latent heat of vaporization recovery system is characterized in that in the brown coal flue gas according to claim 1, and said latent heat recover comprises:
Panel-pipe of heating surface; Be arranged in the flue of said latent heat recover; And be connected in through water pipe between the inlet of water side outlet and heater of the steam turbine in the brown coal combustion system; Be used for that said deduster is discharged flue gas and cool off, and pass through the condensate of the said steam turbine discharge of heat of cooled flue gas absorption so that the steam of flue gas is condensed into water;
The heating surface water collector is arranged at said panel-pipe of heating surface below, is used to collect the water that said flue gas cooling back produces.
3. the recovery system of the moisture and the latent heat of vaporization is characterized in that in the brown coal flue gas according to claim 2, and said latent heat recover also comprises:
Agitator is arranged in the said water collector, be used for stirring said water collector water so that the dust in the water do not precipitate.
4. the recovery system of the moisture and the latent heat of vaporization is characterized in that in the brown coal flue gas according to claim 2, and said latent heat recover also comprises:
The panel-pipe of heating surface purging device is arranged at said panel-pipe of heating surface top and is connected in said heating surface water collector, is used for the water of heating surface water collector output is washed said panel-pipe of heating surface.
5. a latent heat recover is characterized in that, this latent heat recover is connected in through flue between the inlet of outlet and chimney of the deduster in the brown coal combustion system, is used to absorb the heat that said deduster is discharged flue gas;
Said latent heat recover also is connected between the inlet of water side outlet and heater of the steam turbine in the brown coal combustion system through water pipe, is used for the condensate of discharging through the said steam turbine of the heat that absorbs;
This latent heat recover comprises: panel-pipe of heating surface; Be arranged in the flue of said latent heat recover and be connected between the inlet of water side outlet and heater of steam turbine through water pipe; Be used for that said deduster is discharged flue gas and cool off, and pass through the condensate of the said steam turbine discharge of heat of cooled flue gas absorption so that the steam of flue gas is condensed into water;
The heating surface water collector is arranged at said panel-pipe of heating surface below, is used to collect the water that said flue gas cooling back produces.
6. latent heat recover according to claim 5 is characterized in that, said latent heat recover also comprises:
Agitator is arranged in the said water collector, be used for stirring said water collector water so that the dust in the water do not precipitate.
7. latent heat recover according to claim 5 is characterized in that, said latent heat recover also comprises:
The heating surface tube purging device is arranged at said panel-pipe of heating surface top and is connected in said heating surface water collector, is used for the water of heating surface water collector output is washed said heating surface tube.
8. latent heat recover according to claim 5 is characterized in that said panel-pipe of heating surface is made up of many heating surface tubes, and this heating surface tube is a coiled pipe, and outer wall is coated with enamel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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