CN103251123A - Waste heat recovery system of vacuum damping machine - Google Patents
Waste heat recovery system of vacuum damping machine Download PDFInfo
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- CN103251123A CN103251123A CN2013101975502A CN201310197550A CN103251123A CN 103251123 A CN103251123 A CN 103251123A CN 2013101975502 A CN2013101975502 A CN 2013101975502A CN 201310197550 A CN201310197550 A CN 201310197550A CN 103251123 A CN103251123 A CN 103251123A
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Abstract
一种真空回潮机余热回收系统，包括冷凝器和循环水箱，所述冷凝器的下部设有蒸汽入口、冷凝水出口、循环水入口、循环水出口，冷凝水出口、循环水出口通过管路与循环水箱连接，所述循环水入口通过循环泵与循环水箱连接，所述循环水箱内设有散热管，所述冷凝水出口通过管路与散热管连接。本发明以降低换热器管阻和提高换热效率为出发点，符合喷射式真空回潮机蒸汽引射排放的余汽具有瞬时、间歇和大流量特点，将散热器作为一种蒸汽余汽冷凝器进行结构设计，可作为该类型真空回潮机的配套产品使用。
A waste heat recovery system for a vacuum moisture conditioner, including a condenser and a circulating water tank. The lower part of the condenser is provided with a steam inlet, a condensed water outlet, a circulating water inlet, and a circulating water outlet. The condensed water outlet and the circulating water outlet are connected through a pipeline The circulating water tank is connected, the circulating water inlet is connected with the circulating water tank through a circulating pump, the circulating water tank is provided with a cooling pipe, and the condensed water outlet is connected with the cooling tube through a pipeline. The invention starts from reducing the tube resistance of the heat exchanger and improving the heat exchange efficiency, and conforms to the characteristics of instantaneous, intermittent and large flow of the residual steam discharged by the steam ejection of the jet vacuum humidifier, and uses the radiator as a steam residual steam condenser With structural design, it can be used as a supporting product for this type of vacuum conditioning machine.
Description
Technical field
The present invention relates to vacuum conditioner, relate in particular to a kind of waste heat recovery apparatus for vacuum conditioner.
Background technology
The injecting type vacuum conditioner is widely applied at present at the tobacco cutting production line, vacuum conditioner is the primary processing line key processing equipment, its effect is that the smoked sheet that will be stored in the cylindrical shell aspirates into the 9.80kpa(absolute pressure) negative-pressure vacuum, the expansion of finishing the sheet cigarette is loose, go blue foreign smell, desinsection, warming and humidifying technology.Aspiration vacuum relies on the steam ejection pump to realize, steam jet pump need consume steam 330 kg/batch (pot), the surplus vapour that these steam form is generally all introduced outdoor directly to the sky discharging as waste vapour, not only cause thermal waste but also environment is produced certain influence.At present, domestic and international surplus vapour energy recovery generally adopts dual mode, and the one, directly absorption, the 2nd, heat exchange is absorption, the former directly contacts with the cylindrical shell air of exhaust steam and suction by cooling water, heat energy is first to be reclaimed thoroughly, but the hot water that reclaims is contaminated, can not directly utilize, need the secondary heat exchange, the heat energy heat radiation is serious, though therefore there is cigar mill to use, applies being restricted; The latter absorbs by heat exchanger, and reclaiming hot water can directly be utilized, the organic efficiency height, but the resistance of heat exchanging organ pipe has the particular design requirement.
Summary of the invention
The object of the present invention is to provide a kind of vacuum conditioner residual neat recovering system, be used for injection type vacuum conditioner steam waste heat is carried out recuperation of heat, discharging causes energy waste and noise pollution, energy-conserving and environment-protective to sky to improve this kind equipment waste vapour.
Technical scheme of the present invention is:
A kind of vacuum conditioner residual neat recovering system, comprise condenser and cyclic water tank, the bottom of described condenser is provided with steam inlet, condensation-water drain, recirculated water entrance, circulating water outlet, condensation-water drain, circulating water outlet are connected with cyclic water tank by pipeline, described recirculated water entrance is connected with cyclic water tank by circulating pump, be provided with radiating tube in the described cyclic water tank, described condensation-water drain is connected with radiating tube by pipeline.
The bottom of described condenser vertically is provided with dividing plate, and described dividing plate both sides are respectively recirculated water entrance and circulating water outlet.
Described condenser is vertical.
Described condenser top is provided with floss hole.
Described condenser one side is provided with deflector.
Described circulating pump is two groups, adopts parallel way to connect.
Cyclic water tank is provided with water thermometer.
Described condenser is shell-and-tube heat exchanger.
Described condenser vertically is provided with heat exchanger tube, and heat exchanger tube adopts two backhaul transposition square arrangement.
Described adjacent heat exchange tube spacing is 1.4d, and d is the heat exchanger tube external diameter.
The present invention is starting point to reduce the Tube Sheet of Heat Exchanger resistance and to improve heat exchange efficiency, that the surplus vapour that meets injecting type vacuum conditioner steam ejection discharging has is instantaneous, intermittently and big flow characteristics, radiator is carried out structural design as the surplus vapour condenser of a kind of steam, the auxiliary products that can be used as the type vacuum conditioner use, the result shows, the steam waste heat temperature drops to 80 ℃ by 110-120 ℃, and coolant water temperature can be brought up to 60-70 ℃, reaches the energy-saving and emission-reduction purpose.
1. the waste vapour stram condenser of the present invention's manufacturing is applicable to the air-breathing injection type steam jet pump of vacuum conditioner waste vapour energy recovery, can be used as the auxiliary products of injecting type vacuum conditioner;
2. this condenser absorbs the characteristics with instantaneous, big flow, low pressure vapor, and the steam process pressure drop that is condensed is little, is easy to the discharging of air in the steam;
3. adopt the fixed tube sheet shell-and-tube heat exchanger, on the radiator lower end cap dismounting simple and easy, radiating tube is easy to clean;
4. it is strong that radiating tube design has the shrinkage of rising of expansion joint, heat resistanceheat resistant, and shelf life is long;
The present invention adopts vertical installation, and area of dissipation is big, recuperation of heat ability foot.
The present invention is tobacco cutting production line key processing equipment---injecting type vacuum conditioner, be equipped with steam waste heat and reclaim condenser, low pressure, the wink that is used for that this kind equipment steam ejection pump is discharged flows, flow, steam and air mixing used heat carry out waste heat recovery greatly, discharging causes energy waste and noise pollution to sky to improve this kind equipment waste vapour, realizes the industry energy conservation environmental protection.Adopt shell-and-tube fixed tube sheet condenser of the present invention, form heat reclaiming system, by the radiating tube cooling water condensation, waste heat is absorbed the surplus vapour of discharging through shell side, the steam condensation; The cooling water that absorbs heat energy circulates repeatedly through radiating tube, is stored in the water tank, and temperature can be brought up to 60-70 ℃, can be used as the moisturizing of bathing heat-exchange apparatus, thereby saves the bathing steam consumption.
Through certain cigar mill's test, average daily cigarette output 1100 casees of this cigar mill (about 40000 kg tobacco leaves), damping machine batch processed tobacco leaf ability is 2400 kg/pots, 15 pots of day productions, and it is 2 hours that accumulative total is discharged the surplus vapour time, after adopting the present invention, reclaim heat energy 2 * 2.23MW, 75 tons of day 60 ℃ of hot water of generation, hot water can be used for occasions such as bathing, heat energy, economic benefit and obvious social benefit that corresponding fuel combustion produces have been saved.
Description of drawings
Fig. 1 is waste heat recovery pipe network of the present invention and device layout schematic diagram;
Fig. 2 is structure of condenser schematic diagram of the present invention;
Fig. 3 is the schematic cross-section that the condenser radiating tube is arranged.
The specific embodiment
As shown in Figure 1, through the heat exchanger condensation, the heat energy water that is cooled absorbs with former surplus vapour to sky discharging in the present invention, and cooling water is by circulation heating repeatedly, improve the temperature of the cooling water after the heating after, cooling water can be re-used.
As shown in Figure 1, the present invention includes condenser 1 and cyclic water tank 2.
As shown in Figure 2, the bottom of condenser 1 is provided with four mouths, is respectively steam inlet 3, condensation-water drain 4, recirculated water entrance 5, circulating water outlet 6.Steam inlet 3 is connected with damping machine by steam pipework.Condensation-water drain 4, circulating water outlet 6 are connected with cyclic water tank 2 by pipeline.The top of condenser 1 is provided with floss hole 7.Be provided with deflector 8 near condenser 1 inner left wall place, vertically be provided with dividing plate 9 in centre position, condenser 1 bottom.
As shown in Figure 1, cyclic water tank 2 tops are provided with running water moisturizing water pipe and observe lid, the water return outlet 12 of cold water stretches into from cyclic water tank 2 tops, the bottom of cyclic water tank 2 is provided with the delivery port 11 of cold water, be wound with radiating tube 10 in cyclic water tank 2 bottom inside counter offers, the left end of radiating tube 10 and condensation-water drain 4 are communicated with by pipeline, and the right-hand member of radiating tube 10 stretches out from the right side of cyclic water tank 2.On cyclic water tank 2 outer right wall, also be provided with water level meter 15 and water thermometer 16, in order to sensed water level height and water temperature.
Adopt the binary channels way of supplying water between delivery port 11 and recirculated water entrance 5, adopt the circulating pump 13 of two groups of parallel connections, the left side entrance of circulating pump 13 is equipped with filter 14.
Condenser 1 is shell-and-tube heat exchanger, adopts vertically, and adopting vertical purpose is can reduce pipe resistance to the influence of discharge of steam, as carrying out two backhauls designs to the water circulation; Increase the water-circulating pipe journey, be complementary with former surplus vapour delivery pipe diameter.And design by special-purpose vacuum waste heat condenser, reduce the pipe resistance as far as possible and improve heat exchange area and heat exchange efficiency.
Shown in Fig. 2,3, for guaranteeing that steam has good heat radiation in condensation process, the heat pipe of condenser 1 adopts the welding copper pipe, for the ease of cleaning, 25 * 2(external diameter * thickness of employing standard) heat radiation copper pipe, heat exchanger tube adopts two backhaul transposition square arrangement, and adjacent heat exchange tube spacing is 1.4d (d is the heat exchanger tube external diameter), and its queueing discipline as shown in Figure 2.By this rule, can be φ 800 cylinder sections (tube sheet to be placed 2 * 181=362 root radiating tube), the tube sheet side-looking is as shown in Figure 3.
Use:
As shown in Figure 1, has temperature and is 110-120 ℃ the surplus vapour of vacuum conditioning two-stage injection pump, after discharging from vacuum conditioner, enter from the steam inlet 3 of condenser 1 bottom, steam is walked outside the radiating tube, under the water conservancy diversion of deflector 8, reduces flow velocity, increase tube side, its heat energy is absorbed by the water at low temperature that flows in the radiating tube, carries out heat exchange, and steam is condensed into water, condensate water is discharged from the condensation-water drain 4 of bottom, and the water vapour of total condensation is not drained from top discharge mouth 7; The recirculated water entrance 5 of the self cooling condenser of cold water bottom enters, in walking pipe, be heated, water is walked round trip in the pipe in condenser, plug is turned back at the top, carry out the secondary heat absorption, drain from condenser 1 after water is heated, condensed water is heat release again when cyclic water tank 2, and the condensed water heat energy that emits is fully utilized; Thereby cooling water constantly circulation improves its water temperature, thereby reaches the temperature that can utilize.
Relevant calculating
One, the calculating of area of dissipation A
A=πd (L-2δ-0.006)n
Wherein, d----radiating tube external diameter is got 0.025 m
L----radiating tube length is got 4m
δ----tube plate thickness is got 0.015m
N----pipe radical gets 362
A=3.14 * 0.025 (4-2 * 0.015-0.006) * 362=112.6(m then
2)
The tube side circulation area
S=【πd
2-π（d-2τ）
2】/4×n
Wherein, d----radiating tube external diameter is got 0.025 m
τ----radiating tube thickness is got 0.002 m
N----pipe radical gets 262
S=[3.14 * 0.025
2-3.14(0.025-2 * 0.002)
2]/4 * 181=0.026(m
2) (quite DN180)
The shell side circulation area
S=(πD
2-nπd
2)/4
Wherein, D----thimble diameter is got 0.6 m
D----radiating tube external diameter is got 0.025 m
N----pipe radical gets 472
S=(3.14 * 0.6
2-362 * 3.14 * 0.025
2)/4=0.105(m
2) (quite DN365)
Housing is the low-alloy steel cylinder, and φ 800 * 6,4 meters of length
The voltage drop value of steam is 15 ~ 35kPa, (0.015 ~ 0.035MPa)
Cooling water flow velocity: 0.7 ~ 1.0m/s
Steam flow rate in the pipe: greater than 1.5m/s
Two, the calculating of thermic load
The steam condensation process can be divided into two stages, and the phase I, latent heat discharges; 0.1MPa (gauge pressure) steam is down to 0 MPa(gauge pressure by 110 ℃) 100 ℃ of water vapours, its heat is released to total enthalpy poor of two states, is 2691.26 KJ/kg-2675.71 KJ/kg=15.55 KJ/kg; Second stage is by the 0bar(gauge pressure) 100 ℃ of saturated vapors are down to 60 ℃ of hot water and continue to discharge heat energy, poor for its enthalpy, 2675.71-376.96=2298.75KJ/kg, it is 2314.3 KJ/kg that two stages add up to heat releases.
Surplus vapour emission flow 3465kg/h, batch discharge capacity is 462 kg, then the heat of every pot of smoke condensation release is:
2314.3 KJ/kg×462 kg= 1069206.6 KJ
Its transient thermal load is: 1069206.6 KJ/480s=2227.5 KJ/s=2.23MW.
Wherein, Q----thermic load, J/s
The specific heat at constant pressure of----hot fluid, J/ (kg. ℃);
The outlet temperature of----hot fluid, ℃; 60 ℃
C-refrigerant body
The specific heat at constant pressure 4.2K J/ (kg. ℃) of water, the flow of water is 13.9 kg s;
Water heats up:
=38.1 ℃
Two fluid mean temperature differences
The temperature difference of water
: 38 ℃
The temperature difference of steam
=110-60=50 ℃
Mean temperature difference is 44 ℃
Wherein, Q----thermic load, W
The A----heat exchange area, m
2
K-overall heat-transfer coefficient, W/ m
2. ℃
Then overall heat-transfer coefficient K is:
2230000/(43*112.6)=450 W/ m
2. ℃.
Three, the type selecting of water circulating pump and pipeline
The specific heat at constant pressure 4.2 of water, the tube side circulation area of water is equivalent to the DN180 caliber, and the flow velocity control of water is at 0.5m/s, and then the tube side flow of water is
Q=πd
2/4×V=3.14×0.180
2×0.5/4=0.012717 m
3 /s=45 m
3 /h
Hydraulic pressure is 0.2 MPa, looks into Shanghai East Pump Co., Ltd Piping Centrifugal Pumps type selecting table, chooses Model of pump: DFG80-125/2 R/5.5 Piping Centrifugal Pumps, and the tubing pump of selecting for use, its metered flow is 50 m
3/ s, 20 meters of lifts, power of motor are 5.5KW, 2900 rev/mins of rotating speeds, the import and export diameter is DN80.
Being calculated as follows of caliber:
Wherein, Q----is by the flow (m of pipeline
3/ h), get 100
V-----flow velocity (m/s), getting 1.5-2.2 is economic velocity, gets 2.0 here
It is comparatively suitable to choose the DN80 caliber, and its corresponding pipeline is φ 89 * 3.5 hot rolled seamless steel tubes.
Claims (10)
1. vacuum conditioner residual neat recovering system, it is characterized in that: comprise condenser and cyclic water tank, the bottom of described condenser is provided with steam inlet, condensation-water drain, recirculated water entrance, circulating water outlet, condensation-water drain, circulating water outlet are connected with cyclic water tank by pipeline, described recirculated water entrance is connected with cyclic water tank by circulating pump, be provided with radiating tube in the described cyclic water tank, described condensation-water drain is connected with radiating tube by pipeline.
2. vacuum conditioner residual neat recovering system according to claim 1, it is characterized in that: the bottom of described condenser vertically is provided with dividing plate, and described dividing plate both sides are respectively recirculated water entrance and circulating water outlet.
3. vacuum conditioner residual neat recovering system according to claim 1, it is characterized in that: described condenser is vertical.
4. according to arbitrary described vacuum conditioner residual neat recovering system of claim 1 ~ 3, it is characterized in that: described condenser top is provided with floss hole.
5. according to arbitrary described vacuum conditioner residual neat recovering system of claim 1 ~ 3, it is characterized in that: described condenser one side is provided with deflector.
6. according to arbitrary described vacuum conditioner residual neat recovering system of claim 1 ~ 3, it is characterized in that: described circulating pump is two groups, adopts parallel way to connect.
7. according to arbitrary described vacuum conditioner residual neat recovering system of claim 1 ~ 3, it is characterized in that: cyclic water tank is provided with water thermometer.
8. according to arbitrary described vacuum conditioner residual neat recovering system of claim 1 ~ 3, it is characterized in that: described condenser is shell-and-tube heat exchanger.
9. according to arbitrary described vacuum conditioner residual neat recovering system of claim 1 ~ 3, it is characterized in that: described condenser vertically is provided with heat exchanger tube, and heat exchanger tube adopts two backhaul transposition square arrangement.
10. vacuum conditioner residual neat recovering system according to claim 9, it is characterized in that: described adjacent heat exchange tube spacing is 1.4d, and d is the heat exchanger tube external diameter.
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| CN201310197550.2A CN103251123B (en) | 2013-05-24 | 2013-05-24 | A kind of vacuum conditioner residual neat recovering system |
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| CN201310197550.2A CN103251123B (en) | 2013-05-24 | 2013-05-24 | A kind of vacuum conditioner residual neat recovering system |
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| CN103251123B CN103251123B (en) | 2016-03-02 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105962409A (en) * | 2016-07-18 | 2016-09-28 | 红塔烟草(集团)有限责任公司 | Condensate recovery device of vacuum moisture regaining machine and vacuum moisture regaining machine |
| CN109827454A (en) * | 2019-01-26 | 2019-05-31 | 杭州富阳永星化工有限公司 | A kind of vapor recycling system |
| CN111887462A (en) * | 2020-06-23 | 2020-11-06 | 河南中烟工业有限责任公司 | Cooling water circulation system of flexible energy-saving vacuum damping machine |
| CN112179160A (en) * | 2020-09-16 | 2021-01-05 | 安徽沛愉包装科技有限公司 | Control method of heat exchanger |
| CN113446619A (en) * | 2021-06-24 | 2021-09-28 | 华能秦煤瑞金发电有限责任公司 | Cold air steam heating device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105962409A (en) * | 2016-07-18 | 2016-09-28 | 红塔烟草(集团)有限责任公司 | Condensate recovery device of vacuum moisture regaining machine and vacuum moisture regaining machine |
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| CN109827454A (en) * | 2019-01-26 | 2019-05-31 | 杭州富阳永星化工有限公司 | A kind of vapor recycling system |
| CN109827454B (en) * | 2019-01-26 | 2021-01-08 | 杭州富阳永星化工有限公司 | Steam recycling system |
| CN111887462A (en) * | 2020-06-23 | 2020-11-06 | 河南中烟工业有限责任公司 | Cooling water circulation system of flexible energy-saving vacuum damping machine |
| CN112179160A (en) * | 2020-09-16 | 2021-01-05 | 安徽沛愉包装科技有限公司 | Control method of heat exchanger |
| CN113446619A (en) * | 2021-06-24 | 2021-09-28 | 华能秦煤瑞金发电有限责任公司 | Cold air steam heating device |
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|---|---|
| CN103251123B (en) | 2016-03-02 |
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Address after: 450000 Yulin South Road, Henan, Zheng Dong, No. 16 South Road, Zhengzhou Patentee after: China Tobacco Henan Industrial Co., Ltd. Address before: 450000 Henan province Zhengzhou guanchengou Longhai Road No. 72 (Zhengzhou factory) Patentee before: China Tobacco Henan Industrial Co., Ltd. |