Summary of the invention
The object of the present invention is to provide a kind of vacuum conditioner residual neat recovering system, for carrying out recuperation of heat to injection type vacuum conditioner steam waste heat, improving this kind equipment waste vapour and energy waste and noise pollution are caused, energy-conserving and environment-protective to sky discharge.
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 described cyclic water tank, described condensation-water drain is connected with radiating tube by pipeline.
The bottom of described condenser is vertically 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 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 is vertically provided with heat exchanger tube, and heat exchanger tube adopts double back journey transposition square arrangement.
Described adjacent heat exchange tube spacing is 1.4d, d is heat exchanger tube external diameter.
The present invention is to reduce Tube Sheet of Heat Exchanger resistance and to improve heat exchange efficiency for starting point, meet injecting type vacuum conditioner steam ejection discharge remaining vapour have instantaneous, interval and large discharge feature, radiator is carried out structural design as vapour condenser more than a kind of steam, the auxiliary products that can be used as the type vacuum conditioner use, result shows, steam waste heat temperature drops to 80 DEG C by 110-120 DEG C, and coolant water temperature can bring up to 60-70 DEG C, reaches energy-saving and emission-reduction object.
1. the waste vapour stram condenser of the present invention's manufacture, is applicable to vacuum conditioner air-breathing injection type steam jet pump waste vapour energy recovery, can be used as the auxiliary products of injecting type vacuum conditioner;
2. this condenser absorbs and has instantaneous, large discharge, low pressure vapor feature, and the steam process pressure drop that is condensed is little, is easy to the discharge of air in steam;
3. adopt fixed tube sheet shell-and-tube heat exchanger, on radiator, lower end cap dismounting is simple and easy, and radiating tube is easy to cleaning;
4. radiating tube is designed with expansion joint, and anti-rising-heat contracting-cold is strong, and shelf life is long;
The present invention adopts vertical installation, and area of dissipation is large, recuperation of heat ability foot.
The present invention is tobacco cutting production line key processing equipment---injecting type vacuum conditioner, be equipped with steam heat recovery condenser, for this kind equipment steam ejection pump is discharged low pressure, wink stream, large discharge, steam and air mixing used heat carries out waste heat recovery, improve this kind equipment waste vapour and energy waste and noise pollution are caused to sky discharge, realize industry energy conservation environmental protection.Adopt shell-and-tube fixed tube sheet condenser of the present invention, composition heat reclaiming system, the remaining vapour of discharge is through shell side by radiating tube cooling water condensation, and waste heat is absorbed, steam-condensation; Absorb the cooling water of heat energy through radiating tube iterative cycles, be stored in water tank, temperature can bring up to 60-70 DEG C, can be used as the moisturizing of bathing heat-exchange apparatus, thus saves bathing steam consumption.
Test through certain cigar mill, this cigar mill average daily cigarette output 1100 case (about 40000kg tobacco leaf), damping machine batch processed tobacco leaf ability is 2400kg/ pot, produces 15 pots day, and the accumulative discharge remaining vapour time is 2 hours, after adopting the present invention, reclaim heat energy 2 × 2.23MW, produce 60 DEG C of hot water 75 tons day, hot water can be used for the occasions such as bathing, saved the heat energy that corresponding fuel combustion produces, economic benefit and social benefit remarkable.
Detailed description of the invention
As shown in Figure 1, the present invention by former to sky discharge more than vapour through heat exchanger condensation, heat energy be cooled water absorb, cooling water is heated by iterative cycles, improve heating after cooling water temperature 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, bottom condenser 1, centre position is vertically provided with dividing plate 9.
As shown in Figure 1, cyclic water tank 2 top is provided with running water moisturizing water pipe and observes lid, the water return outlet 12 of cold water stretches into from cyclic water tank 2 top, the bottom of cyclic water tank 2 is provided with the delivery port 11 of cold water, radiating tube 10 is wound with in the counter offer of cyclic water tank 2 bottom inside, the left end of radiating tube 10 and condensation-water drain 4 are by pipeline communication, and the right-hand member of radiating tube 10 stretches out from the right side of cyclic water tank 2.Cyclic water tank 2 outer right wall is also provided with water-level gauge 15 and water thermometer 16, in order to sensed water level height and water temperature.
Between delivery port 11 and recirculated water entrance 5, adopt binary channels way of supplying water, adopt the circulating pump 13 of two groups of parallel connections, the left hand inlet port of circulating pump 13 is equipped with filter 14.
Condenser 1 is shell-and-tube heat exchanger, adopts vertical, adopts vertical object to be to reduce the impact of pipe resistance on discharge of steam, as carried out two backhaul design to water circulation; Increase water circulation tube side, match with former remaining vapour delivery pipe diameter.And design by Special vacuum waste heat condensation device, reduce pipe resistance as far as possible and improve heat exchange area and heat exchange efficiency.
As shown in Figure 2,3, for ensureing that steam has good heat radiation in condensation process, the heat pipe of condenser 1 adopts welding copper pipe, for the ease of cleaning, 25 × 2(external diameter × thickness of employing standard) heat dissipation copper pipe, heat exchanger tube adopts double back journey transposition square arrangement, and adjacent heat exchange tube spacing is 1.4d (d is heat exchanger tube external diameter), and its queueing discipline as shown in Figure 2.By this rule, can φ 800 cylinder section (2 × 181=362 root radiating tube to be placed by tube sheet), tube sheet side-looking is as shown in Figure 3.
As shown in Figure 1, having temperature is vapour more than the vacuum conditioning two-stage injection pump of 110-120 DEG C, after discharging from vacuum conditioner, enter from the steam inlet 3 of condenser 1 bottom, steam is walked outside 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 of the Bottomhole pressure that dispels the heat, and carries out heat exchange, steam-condensation Cheng Shui, condensate water is discharged from the condensation-water drain 4 of bottom, and the water vapour of non-total condensation is drained from top discharge mouth 7; Recirculated water entrance 5 bottom cold water condenser enters, heated in walking to manage, water walks round trip in pipe within the condenser, at top, plug is turned back, carry out secondary heat absorption, water is drained after being heated from condenser 1, and condensed water is heat release again when cyclic water tank 2, and the condensed water heat energy emitted is fully utilized; Cooling water constantly circulates thus improves its water temperature, thus reaches the temperature that can utilize.
One, the calculating of area of dissipation A
Wherein, d----radiating tube external diameter, gets 0.025m
L----radiating tube length, gets 4m
δ----tube plate thickness, gets 0.015m
N----pipe radical, gets 362
Then A=3.14 × 0.025 (4-2 × 0.015-0.006) × 362=112.6(m
Tube side circulation area
Wherein, d----radiating tube external diameter, gets 0.025m
τ----radiating tube thickness, gets 0.002m
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) (suitable DN180)
Shell side circulation area
Wherein, D----thimble diameter, gets 0.6m
D----radiating tube external diameter, gets 0.025m
N----pipe radical, gets 472
S=(3.14 × 0.6
2-362 × 3.14 × 0.025
2) (suitable DN365)
Housing is low-alloy steel cylinder, φ 800 × 6, length 4 meters
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 pipe: be greater than 1.5m/s
Two, the calculating of thermic load
Condensation can be divided into two stages, first stage, latent heat treatment; 0.1MPa (gauge pressure) steam is down to 0MPa(gauge pressure by 110 DEG C) 100 DEG C of water vapours, its thermal release is the difference of the total enthalpy of two states, is 2691.26KJ/kg-2675.71KJ/kg=15.55KJ/kg; Second stage is by 0bar(gauge pressure) 100 DEG C of saturated vapors are down to 60 DEG C of hot water and continue release heat energy, and be the difference of its enthalpy, 2675.71-376.96=2298.75KJ/kg, two stages add up to heat releases to be 2314.3KJ/kg.
Remaining vapour emission flow 3465kg/h, batch discharge capacity is 462kg, then the heat of every pot of smoke condensation release is:
Its transient thermal load is: 1069206.6KJ/480s=2227.5KJ/s=2.23MW.
Wherein, Q----thermic load, J/s
---the mass flow of-hot fluid, kg/s;
---the specific heat at constant pressure of-hot fluid, J/ (kg. DEG C);
---the inlet temperature of-hot fluid, DEG C; 110 DEG C
---the outlet temperature of-hot fluid, DEG C; 60 DEG C
The specific heat at constant pressure 4.2KJ/ (kg. DEG C) of water, the flow of water is 13.9kgs;
Water heats up:
=38.1 DEG C
Two fluid mean temperature differences
The temperature difference of water
: 38 DEG C
The temperature difference of steam
=110-60=50 DEG C
Mean temperature difference is 44 DEG C
Wherein, Q----thermic load, W
A----heat exchange area, m
----carry out heat exchange two fluid mean temperature difference, DEG C
K-overall heat-transfer coefficient, W/m
2. DEG C
Then overall heat-transfer coefficient K is:
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 DN180 caliber, and the flow control of water is at 0.5m/s, then the tube side flow of water is
Hydraulic pressure is 0.2MPa, and look into Shanghai East Pump Co., Ltd Piping Centrifugal Pumps type selecting table, choose Model of pump: DFG80-125/2R/5.5 Piping Centrifugal Pumps, the tubing pump selected, its metered flow is 50m
3/ s, lift 20 meters, power of motor is 5.5KW, rotating speed 2900 revs/min, and 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
Choose DN80 caliber comparatively suitable, the pipeline of its correspondence is φ 89 × 3.5 hot rolled seamless steel tube.