Out-tubular condensing type uniform flow vapour-liquid heat exchanger
Technical field
Out-tubular condensing type uniform flow vapour-liquid heat exchanger belongs to the Thermal Equipment field.
Background technology
Heat exchanger is the infrastructure device that numerous industrial departments such as chemical industry, power, metallurgy, food, light industry, the energy, space flight generally use.In many industrial enterprises and technology, occupy the dominance status.And the urgent day by day device of heat exchanging in every respect of energy problem is had higher requirement, and core problem is that requirement improves heat exchanger heat exchange effect, promptly under the identical heat exchange area and the temperature difference, increases the heat of exchange.Researching and developing energy-efficient heat-exchange device, is various countries' one of emphasis solution routes aspect energy savings and protection environment.Therefore, invent a kind of energy-efficient heat exchanger and have very important meaning.
Traditional heat exchanger adopts horizontal tube to condense, and makes overheated or saturated vapor is condensed to the saturated of outlet always or crosses cold fluid.Except inducer can keep the very high coefficient of heat transfer, be decreased to the single-phase fluid interchange of fluid gradually, the liquid film progressive additive that condenses finally becomes monophasic fluid fluid interchange completely, and condensation effect is also just worse and worse.Along with condensing gradually of steam, quantity of steam reduces gradually, and flow velocity obviously descends, and the heat exchange effect worse and worse.Whole heat exchanger large tracts of land all is in the poor efficiency condensation process, greatly reduces the performance of phase-change heat-exchanger, and volume causes cost to increase less economical result greatly simultaneously.
The utility model content
The technical problems to be solved in the utility model is: a kind of the realize condensation water of whole process and in time separating of steam are provided, the liquid film that condenses on the heat-transfer surface is drained, minimizing reduction circulation area along with quantity of steam, steam flow rate is consistent, keep steam flow and have much at one perturbation action everywhere to condensing, can guarantee to have the high efficient heat exchanging form that makes full use of the phase transformation of condensing everywhere, effectively solve the out-tubular condensing type uniform flow vapour-liquid heat exchanger of set of heat exchange tubes expanded by heating problem in service.
The technical scheme that its technical problem that solves the utility model adopts is: this out-tubular condensing type uniform flow vapour-liquid heat exchanger, comprise upper and lower end socket, heat exchanger body, it is characterized in that: be provided with set of heat exchange tubes in the heat exchanger body, the staggered baffle groups of installing is equipped with floating installation between upper cover and the heat exchanger body on the set of heat exchange tubes.This edible new type heat exchanger adopts the vapour-liquid type of flow of out-tubular condensing, by deflection plate the set of heat exchange tubes long tube is divided into short tube, increased the flow process of steam side, guarantee to manage the outer same airflow effect that is subjected to everywhere through design rationally, strengthen the disturbance that steam flows steam is condensed, make steam transversal flow heat exchanger tube, form snakelike best condensation form, make full use of heat exchange surface, improved the coefficient of heat transfer effectively.Reasonably optimizing is provided with the development that deflection plate has destroyed the heat exchange pipe external surface liquid film, make heat exchanger tube keep the higher coefficient of heat transfer, improve the shortcoming of the coefficient of heat transfer decline that liquid film covering heat exchange surface causes in traditional condensing plant, regulate the interval between the deflection plate, can control gas flow rate flexibly, improve heat exchange efficiency effectively, make full use of the heat exchanger space, reduce heat exchanger volume and weight.
The low head top is provided with flange sleeve, and the centre is provided with dividing plate, settles tube sheet between flange sleeve and heat exchanger body, heat exchanger body one side is provided with steam inlet, opposite side is provided with the condensation water outlet, and flange sleeve one side is provided with cooling liquid outlet, and opposite side is provided with cooling liquid inlet.
Floating installation comprises: floating tubesheet, top are provided with header, the below is provided with floating tubesheet and supports, and header and floating tubesheet connect as one, and floating tubesheet supports and is welded on the upper flange.
It is stifled that blowdown is set in the middle of the low head, and the low head bottom is provided with base.
Be connected by upper and lower cover flange between upper and lower end socket and the heat exchanger body.
Be provided with steam in the steam inlet and divide plate.
The pore identical with the heat exchanger tube number is set on the deflection plate, and pore is with copper sheathing, is drilled with aperture around the pore.
Compared with prior art the beneficial effect that the utility model had is: utilize the deflection plate through optimal design that long tube is divided into short tube, adopt segmentation structure, utilize vertical short tube classification heat exchange, make full use of the enhanced heat exchange effect that the phase transformation of inducer thin liquid film is condensed, between every two-stage deflection plate, utilize gravity in time with liquid film and gas phase separation, by the aperture that bores all around on the deflection plate, condensation water is in time discharged, and the spacing between the appropriate design deflection plate, guarantee that steam keeps flow velocity constant substantially in whole flow process, make steam in omnidistance condensation process, can both effectively maintain the high efficient heat exchanging operating mode of thin liquid film condensation, can also utilize simultaneously the thickness of the attenuate liquid film that flows effectively, make whole heat transfer process maintenance condensation heat transfer effect much at one, give full play to the potentiality of heat exchanger tube.Adopt floating installation, reduce thermal deformation, the uneven thermal stress that produces of temperature reduces the requirement to processing technology when effectively reducing operation, has saved expansion joint, good looking appearance, generous.Under identical operating condition, use common working medium, more traditional heat exchanger improves the coefficient of heat transfer more than 10%; Improve 20% than traditional heat exchangers service life, and operating cost reduces more than 10% than traditional heat exchangers; Material consumption reduces greatly.It is simple that this heat exchanger has processing simultaneously, do not need any special processing technology, and cost is low, and the reliability height does not increase advantages such as any operating cost.
Description of drawings
Fig. 1 is that the structure of this out-tubular condensing type uniform flow vapour-liquid heat exchanger is cutd open and shown schematic diagram;
Fig. 2 is that the A-A of Fig. 1 cuts open and shows schematic diagram;
Fig. 3 is that B place steam divides plate local enlarged diagram;
Fig. 4 is the local enlarged diagram of C place deflection plate copper sheathing.
Fig. 1-the 4th, the most preferred embodiment of the utility model out-tubular condensing type uniform flow vapour-liquid heat exchanger, wherein: 1 base, 2 low heads, 3 flange sleeves, 4 cooling liquid inlets, 5 low head flanges, 6 tube sheets, 7 condensation waters export 8 heat exchanger bodies, 9 baffle groups, 10 set of heat exchange tubes, 11 upper flanges, 12 upper cover flanges, 13 floating tubesheets and support stifled 22 steam of 14 floating tubesheets, 15 upper covers, 16 headers, 17 vent valves, 18 steam inlets, 19 cooling liquid outlets, 20 dividing plates, 21 blowdowns and divide plate.
The specific embodiment
With reference to Fig. 1: this out-tubular condensing type uniform flow vapour-liquid heat exchanger, by base 1, low head 2, flange sleeve 3, cooling liquid inlet 4, low head flange 5, tube sheet 6, condensation water outlet 7, heat exchanger body 8, baffle groups 9, set of heat exchange tubes 10, upper flange 11, upper cover flange 12, floating tubesheet support 13, floating tubesheet 14, upper cover 15, header 16, vent valve 17, steam inlet 18, cooling liquid outlet 19, dividing plate 20, blowdown stifled 21 form.Be provided with set of heat exchange tubes 10 in the heat exchanger body 8, the staggered baffle groups 9 of installing on the set of heat exchange tubes 10, between upper cover 15 and the heat exchanger body 8 floating installation is installed, floating installation comprises: floating tubesheet 14, top are provided with header 16, the below is provided with floating tubesheet and supports 13, and floating tubesheet supports 13 and is welded on the upper flange 11.Low head 2 tops are provided with flange sleeve 3, and the centre is provided with dividing plate 20, and the stifled discharging tube 21 of blowdown is set in the middle of the low head 2, and low head 2 bottoms are provided with base 1.8 arrangement tube sheets 6 of flange sleeve 3 and heat exchanger body, heat exchanger body 8 one sides are provided with steam inlet 18, and opposite side is provided with condensation water outlet 7, and flange sleeve 3 one sides are provided with cooling liquid outlet 19, and opposite side is provided with cooling liquid inlet 4.Be provided with and the identical pore of set of heat exchange tubes 10 numbers on the baffle groups 9, set of heat exchange tubes 10 is inserted in the pore, and pore is with copper sheathing, is drilled with aperture around the pore and makes things convenient for condensation water to discharge.Be connected by upper and lower cover flange 12,5 between upper and lower end socket 15,2 and the heat exchanger body 8.
Heat exchanger body 8 downsides have steam inlet 18, and condensation water outlet 7 is arranged on lowermost end; Heat exchanger body 8 is provided with vent valve 17 topmost.Heat exchanger body 8 lower ends and tube sheet 6 welding, upper end and upper flange 11 welding; Positioned inside set of heat exchange tubes 10, baffle groups 9.Set of heat exchange tubes 10 adopts expanded joint or welding manner to be connected with tube sheet 6, floating tubesheet 14.
With reference to Fig. 2: floating tubesheet supports 13 and is welded on the upper flange 11, is supporting floating tubesheet 14, header 16, and floating tubesheet 14 and floating tubesheet support 13 and can without hindrancely slide.
With reference to Fig. 3: steam is set in the steam inlet 18 divides plate 22, prevent the direct impingement heat transfer pipe of steam group 10.
With reference to Fig. 4: on the deflection plate 9 copper sheathing is installed, prevents that set of heat exchange tubes 10 from damaging copper pipe when expanding.
Set of heat exchange tubes is making such as copper pipe, copper alloy tube, steel pipe, stainless steel tube.
The operation principle and the course of work of the utility model out-tubular condensing type uniform flow vapour-liquid heat exchanger are as follows:
Cooling fluid is entered in the set of heat exchange tubes 10 of heat exchanger body 8 by the cooling liquid inlet on the flange sleeve 34, carry out heat exchange with set of heat exchange tubes 10 parts, behind header 16 bafflings, carry out heat exchange with another part of set of heat exchange tubes 10 again after, finally discharge by the cooling liquid outlet on the flange sleeve 3 19.
Steam is entered by the steam inlet on the heat exchanger body 8 18, and the cooling fluid under the obstruct of deflection plate 9 in the part heat exchanger tube of snakelike flow process of formation and set of heat exchange tubes 10 is carried out heat exchange and partial condensation, and condensation water flows into condensation water outlet 7 under the effect of gravity; Steam under the obstruct of deflection plate 9 and heat exchanger body 8 up with the part heat exchanger tube of set of heat exchange tubes 10 in cooling fluid carry out heat exchange and further condensation.Condensation water by the aperture on the deflection plate, flows into condensation water outlet 7 flowing under the effect of gravity on the deflection plate 9 at last; Remaining steam again under the obstruct of deflection plate 9 and heat exchanger body 8 up with the part heat exchanger tube of set of heat exchange tubes 10 in cooling fluid carry out the final all condensations of heat exchange.Condensation water is back to final inflow condensation water outlet 7 on the deflection plate 9 under gravity, and all condensation waters are discharged by condensation water outlet 7.Stifled 21 lowermost ends at heat exchanger of blowdown are set on the low head 2, are convenient to blowdown.Cooling liquid inlet 4, cooling liquid outlet 19 are arranged on the bottom of heat exchanger, help the gas that is heated in the liquid is discharged through flowing.Floating tubesheet 14 and floating tubesheet can without hindrancely slide between supporting 13, and when adding steam, heat-transfer pipe will expand, and floating tubesheet 14 supports 13 without hindrance slip with floating tubesheet, has reduced swelling stress, has saved expansion joint, good looking appearance.When having incoagulable gas in the heat exchanger body 8, open vent valve 17 and drain incoagulable gas in the heat exchanger body 8, keep the high efficient heat exchanging of heat-transfer pipe.