CN101776379A

CN101776379A - Fume hollow blade drier

Info

Publication number: CN101776379A
Application number: CN200910095624A
Authority: CN
Inventors: 王绍良
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-13
Filing date: 2009-01-13
Publication date: 2010-07-14

Abstract

A fume hollow blade drier comprises a W-shaped shell with a jacket and two hollow shafts on which hollow blades are arranged, wherein the hollow shafts therein are provided with baffle plates which divide the inner cavities of the shafts into hot fume cavities and cold fume cavities, a hot fume inlet and a cold fume outlet are respectively arranged at the two ends of each shaft, the axial wall of the hot fume cavity side corresponding to each hollow blade and the axial wall of the cold fume cavity side are respectively provided with a fume inflow opening and a fume outflow opening, which pass through the inner cavities of the hollow blades; in addition, the jacket is also provided with a hot fume inlet and a cold fume outlet. The hot fume is used as a heat transfer medium, heat quantity is transferred to the sludge in the drier in a conduction manner by the hollow blades and the jacket, and the heating and drying processes of the sludge are completed under the stirring action and the alternate action of extrusion and looseness of the drier. The heat transfer warm pressing is improved, the purpose of reducing heat transfer area is achieved, and synchronously, the heat efficiency is improved and the system is simplified.

Description

A kind of flue gas hollow blade drying machine

Technical field

The present invention relates to a kind of drying equipment technical field, specifically is the hollow blade drying machine of the hot flue gas of a kind of usefulness as heat transfer medium, is applicable to the drying of materials such as mud.

Background technology

Existing hollow blade drying machine can only use steam, heat conduction wet goods as heat transfer medium, owing to limited by device structure and conduction oil character, general inlet steam temperature is lower than 180 ℃, the heat conductive oil inlet temperature is lower than 250 ℃, drying machine is huge because of the smaller structure that makes of heat transfer temperature and pressure, can't satisfy the requirement of maximizing to disposal ability in market; Be into condensed water and recycle owing to conduct heat to finish back steam, conduction oil also recycles, so the double evaporation-cooling and the heat radiation of the leakage vapour of drain valve, condensed water produced a large amount of heat loss, and this is the key factor that influences drying thermal efficiency; In mud independence burning scheme, the generation of steam and heating heat-conducting oil need expensive boiler (or heat-conducting oil furnace) and medium preliminary treatment, conveying, storage and control system, thereby have increased equipment manufacturing cost and system failure risk.

Summary of the invention

Technical problem to be solved by this invention is to provide the hollow blade drying machine of the hot flue gas of a kind of usefulness as heat transfer medium at the prior art present situation, and it not only improves the heat transfer temperature and pressure, reaches the purpose that reduces heat transfer area; The effect that improves the thermal efficiency and simplify system is also arranged simultaneously.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: this flue gas hollow blade drying machine, form by the W shape housing that has chuck and two hollow shafts, be arranged with hollow blade on the axle, it is characterized in that being provided with in the described hollow shaft dividing plate that the inner chamber of axle is divided into hot flue gas chamber and cold smoke air cavity, and the cold flue gas outlet that is respectively equipped with the hot gas approach that is communicated with hot flue gas chamber and is communicated with the cold smoke air cavity at the two ends of axle; And have flue gas ostium and the flue gas tap hole that connects the hollow blade inner chamber on the axial wall of the hot flue gas chamber side of corresponding each hollow blade and on the axial wall of cold smoke air cavity side, on described chuck, be provided with flue gas ostium and flue gas tap hole in addition.

Aforesaid drier structure, described hollow blade inside also is provided with deflector, is provided with blade face fin in the scalloped bevel fume side of hollow blade.

Aforesaid drier structure also is provided with in the described chuck and the chuck inner chamber can be divided into several independently dividing plates of smoke flow channels; Described chuck internal face fume side is provided with the chuck fin.

Compared with prior art, the invention has the advantages that: drying machine of the present invention is to adopt hot flue gas as heat transfer medium, be about to hot flue gas and divide two-way, the one tunnel sends into interior each hollow blade that also passes through equably of hollow shaft of hollow blade drying machine, with the heat transferred hollow blade; Another road is sent in the chuck of hollow blade drying machine, with the heat transferred chuck; The heat of hollow blade and chuck is passed to mud in the drying machine with conduction pattern, under effect that drying machine stirs and extruding, lax alternating action, finishes the heating and the dry run of mud.

According to the heat transfer formula: Q=K Δ tF, K is a heat transfer coefficient, Δ t is temperature and pressure, and the instant heating smoke entrance mean temperature and the material (mud) that is dried are imported and exported the difference of mean temperature, and F is a heat exchange area, because hot gas approach temperature generally can reach about 900 ℃, temperature and pressure are improved greatly, and heat exchange area effectively reduces, thereby has dwindled equipment volume, reduce cost, and make the capacity of equipment maximization have possibility.

Because the heat that the cold flue gas discharging is lost is this flue gas loss that just has in the combustion system, in the combustion system Efficiency Calculation, consider, can not repeat to count this part heat loss again in the heat loss of drying machine, only need to consider the radiation loss of drying machine, so the thermal efficiency of drying machine significantly improves.

Under mud independence burning situation, owing to only need incinerator, no longer need to produce the heating surface and the corresponding subsystem of steam or heating conduction oil, so reduced the cost and the reliability that has improved system of system.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention.

Fig. 2 is the A-A cutaway view of Fig. 1.

The specific embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

In conjunction with Fig. 1, shown in Figure 2, the housing of flue gas hollow blade drying machine of the present invention 1 mainly is made of W shape housing 14 that has chuck 4 and the preceding coverboard 11, back coverboard 13 and the last coverboard 12 that are located at its two ends and top.Two hollow shafts 2 are contained in the housing 1, drive by transmission device is rotatable, and be provided with dividing plate 21 in the inside of two hollow shafts 2, by this dividing plate 21 inner chamber of each hollow shaft is divided into hot flue gas chamber 22 and cold smoke air cavity 23, hot flue gas enters the hot flue gas chamber 22 of hollow shaft 2 by the hot gas approach that is located at the hollow shaft front end, and cold flue gas is then exported away by the cold flue gas that is located at the hollow shaft tail end by the cold smoke air cavity 23 of hollow shaft 2.Equal axially-aligned has several hollow blades 3 on two hollow shafts 2, and hollow blade 3 is the Wedge-shape structures that is made of front shroud 31, back shroud 32, scalloped bevel plate 33 and triangle circular arc cover plate 34.And in order to improve the fume side convective heat-transfer coefficient and to reduce wear, deflector 36 all is set in each hollow blade, and in blade scalloped bevel fume side blade face fin 35 is housed.And all there are a flue gas ostium and a flue gas tap hole in each hollow blade inside, and this flue gas ostium and flue gas tap hole are opened respectively on the wall of the hot flue gas of hollow shaft chamber side and cold smoke air cavity side.Like this, the hot flue gas in the hot flue gas chamber 22 is in ostium enters hollow blade 3, with the cold smoke air cavity 23 that enters hollow shaft after the exchange of hollow blade inner surface heat again from tap hole.

Hot flue gas one tunnel is to send in the above-mentioned hollow shaft 2, and another road is to send in the chuck 4, therefore is provided with the outlet of hot gas approach and cold flue gas on chuck 4.For improving the fume side convective heat-transfer coefficient, in chuck 4, be provided with dividing plate 42 simultaneously, chuck be divided into several independently smoke flow channels by the flow of flue gas requirement, in chuck internal face 41 fume side chuck fin 43 is housed in addition by dividing plate 42.

Its operation principle is as follows:

Hot flue gas is divided into two the tunnel, one the tunnel enters the hot flue gas chamber 22 of hollow shaft 2, flue gas ostium on hollow axial wall flows in the hollow blade 3, in the mode of convection current and radiation with heat transferred hollow blade inwall, the flue gas tap hole of cold flue gas on hollow axial wall of finishing heat delivery flows into the cold smoke air cavity 23 of hollow shaft, and flows out hollow shaft from the cold flue gas outlet; Another road enters chuck 4, in chuck 4 in the mode of convection current and radiation with heat transferred chuck inwall 41, the cold smoke air-flow of finishing heat delivery flows out chuck from the cold flue gas outlet on the chuck.The above-mentioned course of work and existing drying machine are diverse.The heat of hollow blade and chuck is passed to mud in the drying machine with conduction pattern, under effect that drying machine stirs and extruding, lax alternating action, finish the heating and the dry run of mud, the dry run of mud (wet stock) is identical with existing blade dryer in the drying machine, no longer narrates its process and principle here.

Drying machine of the present invention can be used as the drying equipment of wet stocks such as mud.

Claims

1. flue gas hollow blade drying machine, mainly form by the W shape housing that has chuck (4) and two hollow shafts (2), be arranged with hollow blade (3) on the axle, it is characterized in that: be provided with the dividing plate (21) that the inner chamber of axle is divided into hot flue gas chamber (22) and cold smoke air cavity (23) in the described hollow shaft (2), and the cold flue gas outlet that is respectively equipped with the hot gas approach that is communicated with hot flue gas chamber and is communicated with the cold smoke air cavity at the two ends of axle; And have flue gas ostium and the flue gas tap hole that connects the hollow blade inner chamber on the axial wall of the hot flue gas chamber side of corresponding each hollow blade and on the axial wall of cold smoke air cavity side; On described chuck, be provided with flue gas ostium and flue gas tap hole in addition.

2. flue gas hollow blade drying machine as claimed in claim 1 is characterized in that: described hollow blade (3) inside is provided with deflector (36), is provided with blade face fin (34) in the scalloped bevel fume side of hollow blade.

3. flue gas hollow blade drying machine as claimed in claim 1 or 2 is characterized in that: be provided with in the described chuck (4) the chuck inner chamber is divided into several independently dividing plates of smoke flow channels (42).

4. flue gas hollow blade drying machine as claimed in claim 1 or 2 is characterized in that: described chuck internal face (41) fume side is equipped with chuck fin (43).

5. flue gas hollow blade drying machine as claimed in claim 3 is characterized in that: described chuck internal face (41) fume side is equipped with chuck fin (43).