Low resistance loss air-vapor heat exchanger
Technical field
The utility model relates to a kind of gas-vapour heat exchanger of Ferrous Metallurgy industry, particularly relates to gas-vapour heat exchanger that a kind of energy-conservation low-resistance is decreased.
Background technology
The present Ferrous Metallurgy already gas of usefulness-vapour heat exchanger generally adopts fin-tube heat exchanger or coiled heat exchanger.Fin-tube heat exchanger generally only is applicable to the low-pressure steam heat exchange, and steam pressure generally below 1.0Mpa, can not adapt to the too high operating mode of steam pressure, and flue gas, steam side drag losses are all bigger than normal.And the coiled heat exchanger generally is used for the overheated of steam boiler steam, and the drag losses of medium (especially steam) side is bigger, and the vapor (steam) temperature fluctuation is big, needs special Desuperheating device.
As shown in Figure 1, be the structural representation of coiled heat exchanger.It mainly comprises: housing 21, snakelike heat exchange tube 22, steam inlet 23, steam (vapor) outlet 24, gas approach 25, exhanst gas outlet 26, the shortcoming of this coiled heat exchanger is: steam side (in the pipe) actual internal area is little, and steam flow rate is too high, so steam side pressure falls excessive; The heat-transfer surface of separate unit heat exchanger is little in addition, is difficult for realizing large-area heat exchange.
As shown in Figure 2, be the structural representation of fin-tube heat exchanger.It mainly comprises: housing 31, fin heat exchange pipe 32, bobbin carriage 33, steam inlet 34, steam (vapor) outlet 35, gas approach 36, exhanst gas outlet 37, this fin-tube heat exchanger shortcoming is: steam side (in the pipe) actual internal area is little, and steam flow rate is too high, so steam side pressure falls excessive; Realize that the big temperature of flue gas falls, must increase row's number of a large amount of finned tubes, row's number of finned tube increases, and also corresponding increase falls in the pressure of fume side.
This shows that above-mentioned existing gas-vapour heat exchanger obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem that gas-vapour heat exchanger exists, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that above-mentioned existing gas-vapour heat exchanger exists, the design people is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of low resistance loss air-vapor heat exchanger of new structure, can improve general existing gas-vapour heat exchanger, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the utility model that has practical value finally.
Summary of the invention
Main purpose of the present utility model is, overcome the defective that existing gas-vapour heat exchanger exists, and provide a kind of new low resistance loss air-vapor heat exchanger, technical problem to be solved is to make it reduce the drag losses of steam side, fume side under the prerequisite of the heat exchange efficiency that guarantees gas-vapour heat exchanger as far as possible, satisfies the specific (special) requirements that UTILIZATION OF VESIDUAL HEAT IN equipment decreases low-resistance; Improve the pressure of equipment ability, satisfy the high steam pressure need of work; The simplified apparatus structure alleviates weight of equipment, reduces the repair and maintenance workload, improves system's operational reliability, prolongs equipment life, thereby is suitable for practicality more, and have the value on the industry.
The purpose of this utility model and to solve its technical problem be to adopt following technical scheme to realize.According to a kind of low resistance loss air-vapor heat exchanger that the utility model proposes, it comprises: tube sheet, heat exchanger tube, housing, deflection plate, bobbin carriage, steam inlet, steam (vapor) outlet, gas approach, exhanst gas outlet and waste liquid outlet; Wherein, be respectively arranged with tube sheet, bobbin carriage be installed, be provided with heat exchanger tube and deflection plate in the inside of housing on the top of housing upper end tube sheet in the bottom and the upper end of housing; Deflection plate is semicircle steel plate, is located on the heat exchanger tube; Upper portion side wall at housing is provided with steam inlet, is provided with steam (vapor) outlet at the lower part of frame sidewall; Bottom surface at housing is provided with gas approach, is provided with exhanst gas outlet on the top of bobbin carriage, is provided with the waste liquid outlet in the bottom of housing.
The purpose of this utility model and solve its technical problem and can also be further achieved by the following technical measures.
Aforesaid low resistance loss air-vapor heat exchanger, wherein said housing is columnar structured; Bobbin carriage is conical.
Aforesaid low resistance loss air-vapor heat exchanger, wherein said heat exchanger tube adopts straight tube.
Aforesaid low resistance loss air-vapor heat exchanger, the middle part of wherein said housing is provided with expansion joint, is provided with the ear seat in the middle and lower part of housing.
Aforesaid low resistance loss air-vapor heat exchanger, wherein said tube sheet is provided with pull bar, and this pull bar one end is welded on the tube sheet, and the other end is provided with screw thread, adopts nut to be fixed with deflection plate; Be arranged with a plurality of distance sink tubes on pull bar, this distance sink tube is the identical round steel pipe of a group length, between per two distance sink tubes deflection plate is installed.
Aforesaid low resistance loss air-vapor heat exchanger, the inside of wherein said housing, the position of corresponding steam inlet is provided with impingement baffle, and this impingement baffle is a circular arc steel plate.
The utility model compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, major technique of the present utility model thes contents are as follows:
The utility model proposes a kind of low resistance loss air-vapor heat exchanger, it mainly comprises: tube sheet, heat exchanger tube, housing, bobbin carriage, steam inlet, steam (vapor) outlet: gas approach, exhanst gas outlet, waste liquid outlet; Middle part at housing is provided with expansion joint, is provided with the ear seat in the middle and lower part of housing; Inside at housing also is provided with pull bar, distance sink tube, impingement baffle and deflection plate; Above-mentioned housing is designed to circular configuration, and bobbin carriage is designed to conical structure, and heat exchanger tube is selected tubular heat exchanger for use; Wherein heat exchanger tube adopts straight tube, not only greatly reduces the tube side resistance and decreases, and also is convenient to the replacing, cleaning of heat exchanger tube etc.; Adopt dismountable bobbin carriage, be convenient to the maintenance of equipment; Optimized the heat exchanger tube arrangement, improved heat exchange efficiency, laid the foundation for recycle flue gas heat as far as possible; The utility model equipment volume is little, and is in light weight, and operation maintenance is convenient, and operation and maintenance cost is low; Equipment life is long.
By technique scheme, the utility model low resistance loss air-vapor heat exchanger has following advantage at least:
1, the utility model low resistance loss air-vapor heat exchanger be designed to circular configuration, bobbin carriage is designed to conical structure, steam flows in case side, the raising of maximum limit the actual internal area of steam, thereby reduced the pressure pressure drop of steam side; This version is to lay a good foundation in raising equipment operating pressure, support equipment life-span.
2, heat exchanger tube of the present utility model is selected tubular heat exchanger for use, adopts straight tube, not only greatly reduces the tube side resistance and decreases, and also is convenient to the replacing, cleaning of heat exchanger tube etc.
3, adopt dismountable bobbin carriage, be convenient to the maintenance of equipment; Optimized the heat exchanger tube arrangement, improved heat exchange efficiency, laid the foundation for recycle flue gas heat as far as possible.
4, low resistance loss air-vapor heat exchanger thermal efficiency height can reduce by 300 ℃ of flue-gas temperatures; Resistance is decreased little, and energy-saving effect is better, has simplified system; The resistance of tube side steam side is decreased little, for advantage has been created in effective utilization of afterheat steam.
5, the utility model equipment volume is little, and is in light weight, and operation maintenance is convenient, and operation and maintenance cost is low; Equipment life is long.
In sum, the low resistance loss air-vapor heat exchanger of the utility model special construction, it has above-mentioned many advantages and practical value, and in like product, do not see have similar structural design to publish or use and really genus innovation, no matter it structurally or bigger improvement all arranged on the function, have large improvement technically, and produced handy and practical effect, and more existing gas-vapour heat exchanger has the multinomial effect of enhancement, thereby be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of specification, below with preferred embodiment of the present utility model and conjunction with figs. describe in detail as after.
The specific embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is the structural representation of prior art coiled heat exchanger.
Fig. 2 is the structural representation of prior art fin-tube heat exchanger.
Fig. 3 is the structural representation of the utility model low resistance loss air-vapor heat exchanger.
1: tube sheet 2: heat exchanger tube
3: housing 4: the ear seat
5: pull bar 6: expansion joint
7: distance sink tube 8: impingement baffle
9: deflection plate 10: bobbin carriage
11: steam inlet 12: steam (vapor) outlet
13: gas approach 14: exhanst gas outlet
15: the waste liquid outlet
21: housing 22: snakelike heat exchange tube
23: steam inlet 24: steam (vapor) outlet
25: gas approach 26: exhanst gas outlet
31: housing 32: fin heat exchange pipe
33: bobbin carriage 34: steam inlet
35: steam (vapor) outlet 36: gas approach
37: exhanst gas outlet
The specific embodiment
For further setting forth the utility model is to reach technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, to according to its specific embodiment of low resistance loss air-vapor heat exchanger, structure, feature and the effect thereof that the utility model proposes, describe in detail as after.
Low resistance loss air-vapor heat exchanger reduces the drag losses of steam side, fume side as far as possible under the prerequisite of the heat exchange efficiency that guarantees gas-vapour heat exchanger, to satisfy the specific (special) requirements that UTILIZATION OF VESIDUAL HEAT IN equipment decreases low-resistance; Improve the pressure of equipment ability, satisfy the high steam pressure need of work; The simplified apparatus structure alleviates weight of equipment, reduces the repair and maintenance workload, improves system's operational reliability, prolongs equipment life.
See also shown in Figure 3, the utility model low resistance loss air-vapor heat exchanger, it comprises tube sheet 1, heat exchanger tube 2, housing 3, ear seat 4, pull bar 5, expansion joint 6, distance sink tube 7, impingement baffle 8, deflection plate 9, bobbin carriage 10, steam inlet 11, steam (vapor) outlet 12: gas approach 13, exhanst gas outlet 14, waste liquid outlet 15;
Wherein, be respectively arranged with tube sheet 1 in the bottom and the upper end of housing 3, on the top of housing 3 upper end tube sheets 1 bobbin carriage 10 be installed, be provided with heat exchanger tube 2 and deflection plate 9 in the inside of housing 3, deflection plate is semicircle steel plate, is located on the heat exchanger tube; Upper portion side wall at housing 3 is provided with steam inlet 11, is provided with steam (vapor) outlet 12 at the lower sides of housing 3; Be provided with gas approach 13 in the bottom surface of housing 3, be provided with exhanst gas outlet 14, be provided with waste liquid outlet 15 in the bottom of housing 3 on the top of bobbin carriage 10;
Be provided with expansion joint 6 at the middle part of housing 3, be provided with ear seat 4 in the middle and lower part of housing 3;
The utility model also is provided with the distance sink tube 7 of pull bar more than 5, two more than two, impingement baffle 8 and the deflection plate more than two 9 in the inside of housing 3;
These pull bar 5 one ends are welded on the tube sheet 1, and the other end is provided with screw thread, adopt nut to be fixed with deflection plate 9; Be arranged with a plurality of distance sink tubes 7 on pull bar 5, this distance sink tube 7 is the identical round steel pipe of a group length, and 7 of per two distance sink tubes are installed deflection plate 9.
Above-mentioned pull bar 5 is that an end is welded on the tube sheet 1, and the threaded round steel of the other end is used for fixing distance sink tube 7, and by distance sink tube 7 deflection plate 9 is fixed on the position of requirement, satisfies steam circulation and heat exchange requirement;
Above-mentioned distance sink tube 7 is the identical round steel pipe of a group length, and distance sink tube 7 is enclosed within on the pull bar 5, and deflection plate 9 is equidistantly fixing, guarantees all even unimpeded of housing 3 circulation passages;
Above-mentioned impingement baffle 8 is circular arc steel plates, is installed in steam inlet 11 places, is in order to protect the heat exchanger tube 2 at steam inlet 11 places, to avoid the heat exchanger tube 2 at steam inlet 11 places to be subjected to washing away of high velocity vapor air-flow, prolonging the service life of this place's heat exchanger tube 2.
Above-mentioned deflection plate 9 is to be through on the heat exchanger tube 2, be evenly arranged in semicircle steel plate in the housing 3 by pull bar 5 and distance sink tube 7, guaranteed the even of housing 3 interior vapor stream circulation passage, impel steam baffling in housing 3 to flow, improved the velocity of liquid assets of steam, prolong the currency of steam in housing 3, thereby improved heat exchange efficiency greatly, lay a good foundation for reducing equipment volume.
The housing 3 of the utility model low resistance loss air-vapor heat exchanger is designed to columnar structured, and bobbin carriage 10 is designed to conical structure, and heat exchanger tube 2 is selected tubular heat exchanger for use, and its tube side selected materials is 20Gh and 16MnII.This version is to lay a good foundation in raising equipment operating pressure, support equipment life-span.The tube side heat exchanger tube adopts straight tube, not only greatly reduces the tube side resistance and decreases, and also is convenient to the replacing, cleaning of heat exchanger tube etc.Adopt dismountable bobbin carriage 10, be convenient to the maintenance of equipment.Optimize heat exchanger tube and arrange, improve heat exchange efficiency, lay the foundation for recycle flue gas heat as far as possible.Adopt circular configuration in addition, reduce weight of equipment.
Saturated vapor enters housing 3 from steam inlet 11, by deflection plate 9 steam is flowed at housing 3 bafflings, steam is by heat exchanger tube 2 and the abundant heat exchange of high-temperature flue gas, after reclaiming the most of heat of high-temperature flue gas, become superheated steam and flow out, satisfy the remote requirement of carrying of user's needs or steam from steam (vapor) outlet 12.
High-temperature flue gas enters heat exchanger tube 2 from gas approach 13 by lower end tube sheet 1, drops to the abundant heat exchange flue-gas temperature of steam and enters bobbin carriage 10 behind the suitable temperature and by exhanst gas outlet 14, finally enters atmosphere or recycles through chimney.
Go into operation initial stage at this equipment, the bottom of housing 3 may some condensate water of aggregation, by waste liquid outlet 15 in time with its eliminating.When the device systems water pressure test or flushing device, surplus liquid is discharged, guarantee the normal operation of equipment by waste liquid outlet 15.
The operation principle of this equipment is exactly to recycle the heat of high-temperature flue gas, and saturated vapor is heated to be superheated steam, satisfying the needs of steam user to superheated steam, or the remote requirement of carrying of steam.
The utility model low resistance loss air-vapor heat exchanger characteristics: steam is in the shell side side flow, the raising of maximum limit the actual internal area of steam, thereby reduced the pressure pressure drop of steam side; Flue gas flows in smooth straight, and it is minimum that its drag losses has been dropped to.
The utility model low resistance loss air-vapor heat exchanger thermal efficiency height can reduce flue-gas temperature 300C; Resistance is decreased little, and energy-saving effect is better, and resistance is decreased less than 530Pa as the tube side fume side, can not establish flue gas row air-introduced machine, has simplified system, has reduced energy resource consumption, and benefit is obvious; It also only is 17.35kPa that the resistance of tube side steam side is decreased, for advantage has been created in effective utilization of afterheat steam.This equipment volume is little, and operation maintenance is convenient, and operation and maintenance cost is low; Equipment life is long.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model, any those skilled in the art, in the scope that does not break away from technical solutions of the utility model, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solutions of the utility model content, foundation technical spirit of the present utility model is to above any simple modification that embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.