CN201016610Y - Easily processing cleaning UNF heat transfer element assembly - Google Patents

Abstract

A UNF flat heat transfer element component UNF which is easy to be processed and cleaned (UNDULATED-NOT CHED FLAT) includes a corrugated positioning plate and a plate. The corrugated positioning plate is rolled to position a big corrugation based on a corrugated plate and the plate is an ordinary plate. A big wave crest of the corrugated positioning plate joins any part of the plate. The corrugation direction and an end form an arbitrary angle and the big positioning wave crest and the end form a right angle. The joining place between the plate and the corrugated positioning plate is contracted by a line; the lap joint is any surface of the plate. The space between all the lap joints is in the same shape and is all contracted by lines. A heat transfer element component, which forms a sealed passage, consists of a plurality of pairs and is placed in a heat transfer element box. The heat transfer element component, used in a flue gas desulfurization heater (GGH) and a denitrated air preheater, is easy to be cleaned and has a better heat transferring effect than NF6.

Description

A kind of easy processing, easy cleaning UNF heat-transfer subassembly

Technical field

The utility model relates to a kind of heat transfer element, what be particularly related to is UNF (UNDULATED-NOTCHED FLAT) the template heat transfer element that a kind of easy processing and manufacturing of multiple layer combination has the easy cleaning characteristic again, particularly suitable thermal power plant desulphurization denitration flue gas heater GGH and denitration preheater also are applicable to any rotary regenerative air preheater.

Background technology

The heat transfer element template is varied, every kind of effect that has every kind, commonly used have a DU, NF6, FNC, templates such as DU3, but be applicable to that the air preheater after flue gas desulfurization flue gas heater (GGH) and the denitration is few, see also shown in Figure 1, it is existing NF6 plate, it comprises location-plate 1 and flat board 2, and described location-plate 1 is big waveform, is overlapped on described dull and stereotyped 2, though therefore the heat transfer element after the combination cleans easily, but heat-transfer effect is poor, is used for flue gas heater (GGH) or denitration air preheater, because of the heat-transfer effect difference increases many heat transfer elements, so exist resistance big, easily block up problems such as ash;

Heat-transfer effect DU3 plate had preferably appearred coming again afterwards, its structure as shown in Figure 2, comprise ripple location-plate 11 and corrugated plating 21, described corrugated plating 21 since its be the Wave crest and wave trough structure, though improved heat-transfer effect, easy cleaning not, the decay of cleansing medium pressure is too fast, can not blow through, cleaning performance is very bad, be used for flue gas heater (GGH) or denitration air preheater because of stifled ash not the resistance that exists of easy cleaning increase and influence the recuperation of heat effect.The final demand that still can't satisfy the user.

For addressing the above problem, the utility model creator obtains this creation-Yi processing, easy cleaning UNF heat-transfer subassembly finally through comparative study of several heat transfer element template and test.

Summary of the invention

The purpose of this utility model is, a kind of easy processing is provided, easy cleaning UNF heat-transfer subassembly, compare with prior art NF and DU template, as using in the air preheater after flue gas desulfurization flue gas heater (GGH) and denitration, compare with NF6, owing to increased ripple, make heat exchange area increase, reach the good and cleaning easily of heat-transfer effect, and processing and manufacturing is simple, the Master Cost purpose of saving 15%, on flue gas heater (GGH) or denitration air preheater, use, simultaneously also solved stifled grey problem, it is little to have reached the long-time running resistance, the purpose that recuperation of heat is effective.More particularly, the heat transfer element that is used for rotary type heat exchanger has many forms, as NF, DU or the like, by further research, test, final determine easily processing, that easy cleaning UNF heat-transfer subassembly can reach heat exchange property is good, cleans easily during operation, processing and manufacturing is easy.

For achieving the above object, the technical solution adopted in the utility model is, a kind of easy processing, easy cleaning UNF heat-transfer subassembly are provided, it comprises a ripple location-plate and a flat board, wherein said ripple location-plate is a rolling bigger waveform on the corrugated plating basis, described flat board is simple, the crest of described ripple location-plate overlaps mutually with any place of described flat board, described flat board is a plurality of clinch in the lap-joint with described ripple location-plate, described overlapping part is the plane, and the contact position is the line contact.The trend of ripple becomes arbitrarily angled with the end, locatees big crest and end at an angle of 90, and the wave-like between described each clinch is identical.Described end is meant and the big vertical end of crest, many such combinations are packed into and have promptly been formed heat-transfer subassembly in the subassembly wrapper, because this assembly is a closed channel, and there is ripple to increase heat exchange area again, so reached existing good heat transfer characteristic, easy cleaning being arranged again, easily make advantage, is very practical combination.

Description of drawings

Fig. 1 is the structural representation of existing NF6 template;

Fig. 2 is the structural representation of existing DU3 template;

Fig. 3 is the utility model UNF template heat transfer element structural representation.

The specific embodiment

Below in conjunction with accompanying drawing, this novel above-mentioned technical characterictic and advantage with other are described in more detail.

See also shown in Figure 3, it is the utility model UNF template heat transfer element structural representation, it comprises a ripple location-plate 111 and a flat board 211, wherein said location-plate 111 is a waveform, described dull and stereotyped 211 ordinary flat, the crest of described ripple location-plate 111 contacts with described dull and stereotyped 211, described dull and stereotyped 211 is a plurality of clinch 211 in the lap-joint with described ripple location-plate 111, described clinch 211 is any position, plane, and the wave-like between described some clinch 211 is identical.The trend of ripple location-plate 111 ripples becomes arbitrarily angled with the end, and ripple location-plate 111 big crests in location and end are at an angle of 90.

The utility model UNF template heat transfer element is by a rolling again ripple location-plate that forms of corrugated plating, described ripple location-plate 111 is with dull and stereotyped 211 any positions placements and form independently medium channel, the ripple location-plate, because of its disturbance and mixed heat transfer medium strong, so heat transfer efficiency is than the NF6 height, simultaneously independently medium closed channel is arranged again, blow grey pressure medium decay slowly, so clean easily.This heat-transfer subassembly of processing and manufacturing can be saved Master Cost more than 15%, therefore, the utility model template heat transfer element can substitute present flue gas heater (GGH) denitration preheater DU3, NF6 template heat transfer element commonly used, under the prerequisite that guarantees thermal parameter, the utility model template heat transfer element is than the easier cleaning of heat transfer element of adopting the DU3 template, thereby can reduce flue gas heater (GGH) or denitration air preheater because of the resistance that stifled ash increases, can increase the recuperation of heat effect.

Through actual applied statistics, the utility model template heat transfer element is applied in the air preheater after a boiler unit of joining 600MW has denitration and replaces the NF6 plate, the height that has heat transfer element now can be reduced to 1600mm from 1700mm, make the heat transfer element height save 100mm.With the identical thermodynamic property of former heat transfer element the time, can make total pressure loss (flue gas resistance) reduce 10%.The annual subsidiary engine power consumption expense that can save surplus in the of 40 ten thousand yuans for power plant.If change cold junction layer heat transfer element the heat transfer element of the utility model template heat transfer element of equal altitudes into by the NF6 plate, its result increases by 2% but reduce exhaust gas temperature significantly and improve the recuperation of heat amount in the pressure loss (flue gas resistance).Boiler efficiency can increase about 0.1% like this.Ten thousand yuans fuel cost surplus the annual saving 200.Be used for GGH and avoid also surplus 50 ten thousand yuans of expenses that the heat transfer element box remove is cleaned.

Claims (1)

1. easily processing, easy cleaning UNF heat-transfer subassembly, this template heat transfer element is characterized in that: it comprises a ripple location-plate (111) and a flat board (211), wherein said ripple location-plate (111) is ripple and the combination of crest greatly, described flat board (211) is an ordinary flat, the big crest of described ripple location-plate (111) overlaps mutually with any place of described flat board (211), described ripple location-plate (111) and flat board (211) any part lap-joint be a plurality of clinch, described clinch is that the plane contacts with the line of circular arc, clinch and adjacent clinch composition closed channel, closed channel is at random, locate big crest and end at an angle of 90, described end is meant and the big vertical end of crest.

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