CN2083734U - Single tube insert type bar-shaped heat exchanger - Google Patents

Abstract

The utility model discloses a single pipe insert type spray-flow heat exchanger, belonging to a heat exchange element. The utility model is characterized in that an air inlet pipe, a conical spray-flow pipe, and a first stage spray-flow pipe are welded according to sequence to form an inner pipe. The inner pipe is coaxially sheathed with a heat exchange outer pipe. More than one-stage spray-flow pipe with an interlayer can be installed between the air inlet pipe and the heat exchange pipe. The whole heat exchange pipe can be fixed on the single pipe insert type spray-flow heat exchanger by a flange and a screw bolt. The free end of the inner pipe is fixed positioned by a position fixing column. The single pipe insert type spray-flow heat exchanger adopts double pass heat exchange and not less than once spray-flow heat exchange manner. The utility model has the advantages of high thermal efficiency, convenient manufacture, convenient maintenance, and convenient replacement, and has the advantage that the damage which is caused by heat distortion can be avoided.

Description

Single tube insert type bar-shaped heat exchanger

Single tube plug-in type clavate efflux heat-exchanger belongs to heat exchange elements.

Have following shortcoming when giving hot-air or coal gas by large-scale and centralized heat exchanger with high-temperature flue gas: thermal stress can strengthen and proportional rising along with the swell increment of heat exchanger; The skewness of cooling medium can make heat exchanger hot-spot and distortion; The detection of making, maintenance, thermal current, distribution and adjusting are all had any problem, especially flue-gas temperature surpass 1000 ℃ and when using a plurality of burner more very, so the thickness of material is thickened along with the increase of heat exchanger volume.Thereby use the middle-size and small-size industrial furnace of a plurality of burners at present, beginning develops to the distributing heat exchanger, a kind of single tube plug-in type sleeve-shaped heat exchanger has abroad appearred at present, pipe returned along the inwall of heat exchanger tube in its cold air passed always, it is the round trip double pipe heat exchanger, its shortcoming is to compare with the injection heat transfer mode, and its coefficient of heat transfer is lower.

For the further adverse effect that improves heat exchange efficiency and eliminate thermal expansion heat exchanging device.The utility model proposes a kind of single tube plug-in type clavate efflux heat-exchanger.

Of the present utility model being characterised in that: its interior pipe is by air inlet pipe, the side has the taper diffusion type jet pipe of spurt hole and side and bottom all to have the first order jet pipe of spurt hole to be welded successively, when cold air therefrom passes through successively, spray to by the gas that will give heat of spurt hole ejection and to be returned by shelves behind exchanger head and the tube wall thereof and turn back along the interlayer between heat exchanger tube and the interior pipe, with that the spurt hole of an interlayer jet pipe by being enclosed within air inlet pipe outside again directive heat exchanger tube inwall carry out secondary and give heat and flow out from the gas outlet, this interlayer jet pipe can be provided with one-level incessantly, respectively weld with the heat exchanger tube inboard mutually with an annular seal head at two ends at it, interlayer jet pipe one end in the middle of being positioned at will weld mutually with the outside of air inlet pipe, the openend of heat exchanger tube is by the solid weldering of the blue dish of a method and use gasket seal, weld mutually with a back cover ring flange in the outside of air inlet pipe, weld bolt on it then welds mutually with an above-mentioned ring flange, can be fixed on whole heat exchanger tube on the device with bolt by the latter.The free end of interior pipe is located by reference column.Like this, just thoroughly eliminated the influence of thermal expansion, reduced the requirement of heat exchanging tubing matter and intensity, and owing to realized that round trip is conducted heat and multi-stage jet has also improved heat exchange efficiency widely, even the heat exchange area of heat exchanger tube end socket also is fully utilized.

Facts have proved: its heat exchange efficiency is very high, and under the situation with Reynolds (Reynold's) criterion, its heat transfer coefficient value is than an almost big order of magnitude when tube wall flows.

For the utility model being narrated in more detail, now as follows employed accompanying drawing title of present specification and numbering brief introduction in conjunction with the following examples:

Accompanying drawing 1: the single tube plug-in type is sprayed the heat exchanger profilograph.

Embodiment:

Ask for an interview Fig. 1.Wherein, the 1st, short tube, it is given the escape pipe of hot gas; The 2nd, end socket is made with heat resisting steel; The 3rd, end socket with holes; The 4th, reference column, its material and 2 with, totally 4; The 5th, first order jet pipe, the 6th, heat exchanger tube, its material is with 2; The 7th, conical nozzle; 8, the 9th, annular seal head, the 10th, second level jet pipe, i.e. interlayer jet pipe, the 11st, air inlet pipe; The 12nd, packing ring; The 13rd, the blue dish of back cover method; The 14th, ring flange, the 15th, pad, the 16th, hex nut, the 17th, weld bolt, the 18th, spurt hole, wherein 11 is A ₃Water gas pipe.11 and 77 and 5 all is that welding connects, each welds 10 two ends with the inboard of heat exchanger tube 6 with 9 mutually with an annular seal head 8, the outer wall cover of air inlet pipe 11 has welded a back cover ring flange 13, weld bolt 17 on 13 weld mutually with the openend of heat exchanger tube 6 with one and empty be enclosed within on the air inlet pipe outer wall ring flange 14 solid welderings and with hex nut 16 pinnings, pad 12 is arranged with anti-gas-leak between 13 and 14, the free end of interior pipe is then lived surely by four reference columns that are welded on heat exchanger tube 6 inwalls.Whole heat exchanger can be fixed by bolts on the device by 14, allows its other end free wxpansion to eliminate the influence of thermal stress.When cold air passes through from interior pipe successively, the gas that gives heat when spurt hole 18 sprays to heat exchanger tube by heat exchanger tube end socket 2 and tube wall keeps off back and turn back along the interlayer between heat exchanger tube and the interior pipe, spray to once more by the spurt holes 18 above the sandwich nozzle 10 that is enclosed within air inlet pipe outside with that the heat exchanger tube inwall carries out heat exchange second time and from the gas outlet outflow, this sandwich nozzle also can be provided with multistage.Because it is round trip heat exchange and secondary or the above heat exchange of secondary, thereby heat exchange efficiency greatly improves; Secondly because heat exchanger tube and in Guan Yiduan fix, the other end can free wxpansion, has thoroughly eliminated the influence that thermal expansion produces.Intensity is lower, the thickness materials with smaller is made heat exchanger tube so can adopt; Because the good cooling results of injection heat transfer makes the heat exchanger tube temperature lower, further reduce requirement to material; Heat exchanger tube and interior pipe wait all cylindrical, easy to process; As long as hex nut 16 and back cover ring flange 13 are unloaded and can take out interior pipe, if the nut on other four bolts that are used for fixing on 14 (among the figure picture) is unloaded next can taking off whole single tube efflux heat-exchanger, thereby maintain and replace is all very convenient.

Claims (1)

1, a kind of single tube plug-in type clavate heat exchanger, it comprises heat exchanger tube and has the interior pipe of spurt hole, both coaxial sockets, of the present utility model being characterised in that, interior pipe is by air inlet pipe, taper diffusion type jet pipe and tube wall and the pipe end, all have the first order jet pipe of spurt hole to be welded successively, in the interlayer between air inlet pipe and the heat exchanger tube, also can be equipped with the interlayer jet pipe that is no less than one-level, its two ends respectively are welded with an annular seal head and weld mutually with the heat exchanger tube inwall by them, the outer wall cover of air inlet pipe has welded one can make the securing back cover ring flange of air inlet pipe one end, weld bolt on it and a ring flange are fixed and are welded and pin with nut, this ring flange is to weld mutually with the openend of heat exchanger tube and empty being enclosed within on the air inlet pipe outer wall, between back cover ring flange and this ring flange, gasket seal is housed, then with the reference column location that is welded on the heat exchanger tube inwall, whole heat exchanger tube is fixed by bolts on the device by ring flange the free end of interior pipe.

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