High-efficiency rectangular shell-and-tube heat exchangers for district heating
Technical field
The invention belongs to heat transmission equipment, particularly use the less steam-water heat exchanging equipment of end difference of rectangle tube sheet.
Background technology
Mostly its heating steam of carbonated drink heat exchangers for district heating that is used for city heat supply at present generally is superheated steam; The utilization of superheated steam generally be adopt the superheat section involucrum of sealing and feed temperature is improved reduce poor to water end (W.E.); And traditional heat exchangers for district heating becomes a unfavorable factor on the contrary owing to can not effectively utilize by the structural limitations superheated steam, makes the equipment thermal (temperature difference) stress increase and causes hidden danger; Save energy majority for the heat that utilizes steam fully simultaneously and require drain temperature low as far as possible, drain approach is less, generally about 10 degree.For realize this requirement a kind of in design be to adopt the drain cooler of connecting again, so just cause its system architecture comparatively complicated; Another kind is built-in hydrophobic cooling section just is provided with sealing in equipment a hydrophobic involucrum, so just causes the complex structure of equipment own, and thermal (temperature difference) stress take place to leak than Da Yi or hydrophobic security incident such as not smooth.For this reason, those skilled in the art were devoted in recent years to design and a kind ofly can make full use of the superheated steam degree of superheat and satisfy not only the little but also safe and practical new type heat exchanger of drain approach, but to ending at present, new breakthrough were not arranged as yet.
Summary of the invention
In order to overcome the deficiency of existing heat transmission equipment, the present invention provides a kind of high-efficiency rectangular shell-and-tube heat exchangers for district heating, and this high-efficiency rectangular shell-and-tube heat exchangers for district heating not only can make full use of the superheated steam degree of superheat, and drain approach is little, safe and practical.
The technical solution adopted for the present invention to solve the technical problems is: a kind of high-efficiency rectangular shell-and-tube heat exchangers for district heating; Comprise heater housing, heat-exchanging tube bundle, heat supply network circulating water intake, outlet; Superheated steam import, hydrophobic outlet; It is characterized in that: the rectangle heat-exchanging tube bundle that described heat-exchanging tube bundle is formed for the front end tube sheet that is welded on rectangle respectively by two ends and the heat exchanger tube of the laying of the level on the tube sheet of rear end; Tube sheet both sides, front and back are being welded side shield respectively, and semicylindrical front and back bobbin carriage is welded on the side shield two ends respectively, and the semicylindrical admission collection case that has steam inlet is equipped with in side shield and front and back end tube sheet top; The semicylindrical hydrophobic collection case that has hydrophobic outlet is equipped with in the below; Side shield, front and back bobbin carriage, admission collection case, hydrophobic collection case are formed the heater shell, and the horizontal pass partition of interlaced layout is equipped with in heat supply network circulating water intake, outlet that level is housed on the front header in the bobbin carriage of front and back.
1-2 deferent bundle support plate also is housed between the front and back tube sheet of described rectangle heat-exchanging tube bundle, and its two vertical long side is welded to connect with two side shields respectively.
Be drilled with the pore of vertical minute journey on the tube sheet of described front and back.
The air inlet below of described admission collection case is provided with the porous homogenizing plate of level.
The invention has the advantages that: thereby 1, adopt the rectangle tube sheet to make the arrangement of heat exchanger tube make full use of the space to greatest extent, under the situation in the identical space that holds heat-exchange tube, increased the quantity of heat exchanger tube, heat exchange area has been increased about 40%; 2, the support of heat exchanger tube relies on two ends tube sheet and middle tube bank support plate, has cancelled the traditional deflection plate or the supporting construction of rod baffle, and structure more simply supports more reliable; 3, recirculated water walks to manage side heat exchanger tube horizontal arrangement; Adopt the arrangement form that goes out on advancing under the short heat exchanger tube length multipaths; Steam gets into through top admission collection case, and heat exchange is flowed out by down hydrophobic collection case again through between the pipe of the uniform rectangular tube bundle in gap, with recirculated water formation countercurrent flow; 4, superheated steam also makes that to the water that is heated of low temperature thermal (temperature difference) stress is little to the condensate that is heated water low temperature of high temperature; 5, the degree of superheat of superheated steam makes full use of the superheat section involucrum that need not establish sealing and can obtain to make the effect of feed temperature raising reduction to the water end (W.E.) difference, and the hydrophobic cooling section involucrum that need not establish sealing simultaneously can obtain to reduce the effect that drain temperature is practiced thrift quantity of steam; 6, the admission space is strengthened significantly, has avoided the direct impact of steam exchange heat pipe in the prior art fully, has reduced the damage of heat exchanger tube, and the vibration of equipment, the service life of having improved equipment greatly; 7, saved a large amount of support components that use in the pipe heat exchanger, and made the simple installation of heat exchanger tube, manufacturing cost also significantly reduces; 8, the very convenient hydrophobic control of hydrophobic collection case of large space can be established drain trap no longer in addition; 9, the collection box-shaped formula of half and half cylinder type can conveniently be provided with manhole, is easy to equipment repair and maintenance, more can improve heat exchange efficiency greatly as adopting efficient heat-exchanging pipe; 10, between traditional heat exchangers vertical and horizontal between physical dimension be convenient to the installation and the layout of equipment; It is a kind of energy-efficient heat transmission equipment.
The invention has the beneficial effects as follows owing to adopt the rectangle tube sheet can make full use of the space and increase heat exchange area raising heat exchange efficiency; It is simple that heat exchanger tube length weak point is easy to supporting construction; Steam and recirculated water countercurrent flow; High-temperature steam end and hydrophobic side all can realize that the end difference is little, and employing admission collection case has increased the admission space and alleviated steam and exchange the direct impact of heat pipe and increase the service life.
Description of drawings
Fig. 1 is a structural representation of the present invention,
Fig. 2 is the A-A cutaway view of Fig. 1.
Fig. 3 is the B-B cutaway view of Fig. 1.
Among the figure, 1. front end bobbin carriage, 2. rear end bobbin carriage, 3. front end tube sheet, 4. rear end tube sheet, 5. tube bank support plate, 6. heat exchanger tube, 7. admission collection case, 8. hydrophobic collection case, 9. right side baffle plate, 10. left side baffle plate, 11. pass partitions, 12. homogenizing plates.
The specific embodiment
The specific embodiment of the present invention is, and is as shown in the figure:
Embodiment 1; A kind of high-efficiency rectangular shell-and-tube heat exchangers for district heating; Comprise heater housing, heat-exchanging tube bundle, heat supply network circulating water intake, outlet; Superheated steam import, hydrophobic outlet is characterized in that: the rectangle heat-exchanging tube bundle that the heat exchanger tube 6 that described heat-exchanging tube bundle is laid for the front end tube sheet 3 that is welded on rectangle by two ends respectively and the level on the rear end tube sheet 4 is formed, and tube sheet both sides, front and back are being welded right side baffle plate 9 and left side baffle plate 10 respectively; Semicylindrical front end bobbin carriage 1 rear end bobbin carriage 2 is welded on the side shield two ends respectively; The semicylindrical admission collection case 7 that has steam inlet is equipped with in side shield and front and back end tube sheet top, the below have hydrophobic outlet semicylindrical hydrophobic collection case 8, side shield, front and back bobbin carriage, admission collection case, hydrophobic collection case are formed the heater shell; Heat supply network circulating water intake, the outlet of level are housed on the front header, the horizontal pass partition 11 of interlaced layout is housed in the bobbin carriage of front and back.
1-2 deferent bundle support plate 5 also is housed between the front and back tube sheet of described rectangle heat-exchanging tube bundle, and its two vertical long side is welded to connect with two side shields respectively.
Be drilled with the pore of vertical minute journey on the tube sheet of described front and back.
The air inlet below of described admission collection case is provided with the porous homogenizing plate 12 of level.