CN2175900Y - Vertical long-life blast heater - Google Patents

Abstract

The utility model relates to a vertical long-life hot-blast stove, being composed of a furnace body and a combustion chamber. The furnace body is composed of an internal heat exchanger and an external heat exchanger. The internal heat exchanger is composed of a detachable U-shaped tube bundle, and the external heat exchanger is composed of a thread smoke tube and three sleeve barrels. The internal heat exchanger and the external heat exchanger are respectively provided with a blast inlet and a blast outlet which can respectively output two series of hot blast with different wind temperature and different heat quantity and can also be connected in series to output high temperature hot blast. The utility model can be used for drying of the grain, the product of the chemical industry and the food of the light industry and can be used as the clean hot blast source of the heating and ventilation in the mine, etc. The hot-blast stove has the advantages of long service life, small size, small volume, less power consumption and high thermal efficiency.

Description

Vertical long-life blast heater

The utility model relates to a kind of hot-blast stove.

The hot-blast stove of existing operation exists in varying degrees that cooling condition is relatively poor, the high-temperature region flue bears whole combustion chamber weight, so that cause high-temperature region combustion chamber crackle, burn and come off, flue bubbling and burn down phenomenon and often take place, directly endanger service life, but also it is big to exist size, and body weight, blower fan power consumption are big, makes and the operating cost increase and cause.The patent No. be 92210045 " is the hot-blast stove of the energy with the fluid fuel " disclose adopt many groups by center sleeve, radiation sleeve, auxilliaryly penetrate an interior heat exchange body and the outer heat exchange body that pot is formed, the structure that combustion chamber etc. are formed, this technical scheme is owing to adopt higher exhaust gas temperature of multicenter sleeve pipe and high wind speed, make it that appearance and size reduces and weight saving, but because cooling condition is poor, reasons such as thermal expansion difference and technology cause down the bottom of a pan that obscission once took place.

In view of the deficiency that existing hot-blast stove exists, the purpose of this utility model be to provide a kind of life-span long, size is little, body is light, little power consumption, hot-blast stove that the thermal efficiency is high.

Technical solution of the present utility model in order to achieve the above object realizes in the following way.The utility model comprises the combustion chamber, interior heat exchanger, external heat exchanger, air inlet, air outlet, exhaust opening, interior heat exchanger is located on the combustion chamber, heat exchanger was made of the U-shaped tube bank that is suspended on the tube sheet in its main points were, the U-shaped pipe entad distributes, the two ends of U-shaped pipe are divided into two air compartments by demarcation strip, periphery communicates with air inlet, the middle part communicates with air outlet, external heat exchanger is by urceolus, the threaded flue bundle that is provided with on the two-layer sleeve that is provided with in the urceolus and urceolus and the formed passage of ground floor sleeve constitutes, be provided with air inlet and air outlet on the external heat exchanger in addition, urceolus and ground floor sleeve form the exogenous wind ring, ground floor and second layer sleeve form interior vane, outer vane communicates with air inlet, interior vane communicates with air outlet, flue gas is by first, two layers of many horizontal smoke pipe that upper cartridge is provided with, last smoke-box, threaded flue bundle, following smoke-box communicates with exhaust opening, and the tube sheet of interior heat exchanger and external heat exchanger fix with the flange of band angle steel.

The utility model is compared with the similar hot-blast stove of existing operation and is had the following advantages:

1, the U-shaped pipe is suspended on the tube sheet, thus the thermal expansion freedom, reliable operation; A small amount of damage can be blocked up, and damages interchangeablely in a large number, therefore prolongs complete machine service life.

2, because of having adopted threaded flue, can augmentation of heat transfer, exothermic coefficient can improve 1.5～1.8 times, because of having adopted the tube bank of minor diameter U-shaped, strengthens heating surface area in same space again, therefore improves the thermal efficiency, alleviates body of heater weight 40%, reduces about one meter of body of heater height.

3, adopted flue to bear deadweight, the double supporting structure that heat exchange was thought highly of in smoke pipe bore, the phenomenon that can avoid the flue bubbling or burn heap is so can improve functional reliability and service life.

4, adopt two air channel structures, can reduce duct resistance, and can supply with different wind-warm syndrome and different heating loads, reduce approximately 30%, save the distribution requirement so reduce the operation electricity charge according to requirement of engineering, also can be with the use of two kinds of hot blasts polyphones.

5, owing to adopt full symmetrical configuration, heat proof material is adopted in the high-temperature region, therefore prolongs whole service life.

Fig. 1 is a cross-sectional view of the present utility model.

Fig. 2 is the structural representation of combustion of liquid gaseous fuel Combustion of Hot Air Furnace chamber 1.

Fig. 3 is the A-A cutaway view of Fig. 2.

1 buring solid fuel hot-blast stove most preferred embodiment is described in conjunction with the accompanying drawings.As can be seen from Figure 1, this hot-blast stove is made up of body of heater and combustion chamber 2, and the combustion chamber has insulation material 5, backplate 6 to constitute outward by lining of fire brick 4, and its sidewall is provided with cast iron fire door 1, and fixed grate 3 is settled in the bottom.Body of heater is by external heat exchanger, interior heat exchanger, air inlet 14,26, air outlet 16,23, exhaust opening 7, time smoke-box 8, last smoke-box 18 are formed, external heat exchanger comprises three sleeves and threaded flue bundle, two layers of sleeve 10 and 11 are set again in the urceolus 9, ground floor sleeve 10 forms outer vane with urceolus 9, wherein is provided with the uniform threaded flue bundle 13 of same diameter again, and second layer sleeve 11 claims flue again, second layer sleeve and flue form interior vane, and furnace outer wall is provided with circumferentially uniform a plurality of fins 12.Interior heat exchanger is made of the entad uniform U-shaped tube bank 21 that is suspended on the tube sheet 24 of many rows, and U-shaped pipe high temperature section adopts the surface of heat proof material or pipe to scribble high-temperaure coating.Tube sheet and external heat exchanger fix with angle steel flange 20, and place on the combustion chamber 2, separating with demarcation strip 22 between every U-shaped pipe two ends, air enters annular air compartment 25 by air inlet 26, enter the outer end of U-shaped pipe 21 again, the inner end of process U-shaped pipe is collected to air outlet 23.The air inlet 14 of external heat exchanger is located on the ring eccentric inlet air plenum 15 of outer tube side wall, air outlet 16 is located on the sidewall of urceolus upper end, air is entered outer vane, following smoke-box 8 outsides, is entered interior vane by air inlet 14, inlet air plenum 15, enter out air compartment 17 by a plurality of horizontal smoke pipe 19 outer walls then, go out from air outlet 16.Coal on the fixed grate 3 through gas fume after burning by U-shaped restrain outer surface, laterally smoke pipe 19, go up smoke-box 18, threaded flue 13, smoke-box 8 down, discharge by exhaust opening 7, smoke evacuation is drawn by air-introduced machine.Threaded flue top is provided with the lid that can turn on as shown in the figure, not open whole external heat exchanger lid, just can clear up smoke pipe knot ash.

From Fig. 2 and 3 as can be seen, fuel oil, the combustion chamber 2 of the hot-blast stove of combustion gas, by refractory brick 4, insulation material 5 and stove plate 6, burner 27 constitutes, and burner 27 is arranged on two eccentric relatively sidewalls of combustion chamber, also can be arranged on and entad arrange on the sidewall.

Claims (4)

1, a kind of vertical high life hot-blast stove, comprise the combustion chamber, interior heat exchanger, external heat exchanger, air inlet, air outlet, exhaust opening, interior heat exchanger is located on the combustion chamber, heat exchanger is made of the U-shaped tube bank that is suspended on the tube sheet in it is characterized in that, the U-shaped pipe entad distributes, the two ends of U-shaped pipe are divided into two air compartments by demarcation strip, periphery communicates with air inlet, the middle part communicates with air outlet, external heat exchanger is by urceolus, the threaded flue bundle that is provided with on the two-layer sleeve that is provided with in the urceolus and urceolus and the formed passage of ground floor sleeve constitutes, be provided with air inlet and air outlet on the external heat exchanger in addition, urceolus and ground floor sleeve form the exogenous wind ring, and ground floor and second layer sleeve form interior vane, and outer vane communicates with air inlet, interior vane communicates with air outlet, flue gas is by first, two layers of many horizontal smoke pipe that upper cartridge is provided with, last smoke-box, threaded flue bundle, following smoke-box communicates with exhaust opening, and the tube sheet of interior heat exchanger and external heat exchanger fix with the flange of band angle steel.

2, hot-blast stove as claimed in claim 1 is characterized in that the high temperature section of the U-shaped tube bank of said interior heat exchanger adopts the surface of heat proof material or pipe to scribble high-temperaure coating.

3, hot-blast stove as claimed in claim 1 is characterized in that the air outlet of said external heat exchanger is located on the sidewall of body of heater upper end, and air inlet is located on the ring eccentric inlet air plenum of sidewall of the furnace body, and exhaust opening is located on the following smoke-box of sidewall of the furnace body lower end.

4, hot-blast stove as claimed in claim 1 is characterized in that threaded flue top is provided with the lid that can turn on.