CN2202130Y

CN2202130Y - Long-life horizontal hot-blast stove

Info

Publication number: CN2202130Y
Application number: CN 94219836
Authority: CN
Inventors: 包传福; 张泽清
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-08-24
Filing date: 1994-08-24
Publication date: 1995-06-28
Anticipated expiration: 2004-08-24

Abstract

The utility model relates to a long-life horizontal hot-blast stove, comprising a coal hod, a stove body, a grate, a hot-blast passage, a gas passage, an air inlet, an air outlet and a smoke vent. The hot-blast passage is composed of a group of or more groups of U-shaped tube bundles which are arranged at the upper part of the grate, and the two ends of the tube bundle are respectively hung on the tube plate of an air-in box and the tube plate of an air-out box. The air inlet and the air outlet, which are communicated, are respectively arranged at the top or one side of the air-in box and the air-out box The flue gas passes through a throat of the furnace chamber which is composed of a tilting type face arch and a step type rear arch, transversely washes the external surface of the U-shaped tube bundles and then is expelled. The utility model can provide different air temperature and different heating load and has the advantages of long service life, high thermal efficiency, small size, less power consumption and low cost.

Description

Long-life horizontal hot-blast stove

The utility model relates to a kind of horizontal high life hotblast stove.

Horizontal hot air furnace mostly adopts the transverse pipe type heat transfer device at present, smoke pipe adopts boiler structure commonly used, easily cause the tube sheet hot tearing or burn curved heat transfer tube and reduction of service life, in order to address these problems, Chinese patent 91209513 provides " a kind of hotblast stove that overcomes the thermal distortion damage ", it can be because of thermal stresses hot tearing tube sheet when long term high temperature is worked, long service life, but this structure difficulty of processing is big, heat-transfer effect is poor, heat interchanging area is little, only is applicable to the low profile thermal wind furnace, and a kind of wind-warm syndrome and heat supplied are provided.

In view of above the deficiencies in the prior art, the purpose of this utility model is to provide a kind of life-span long, and size is little, little power consumption, and the thermo-efficiency height provides the horizontal high life hotblast stove of multiple wind-warm syndrome simultaneously.

The purpose of this utility model realizes in the following way: the utility model has coal bunker, body of heater, fire grate, hot-air channel, exhaust gases passes, blast inlet, air outlet and smoke outlet, hot-air channel is made up of the U-shaped tube bank that one or more groups two ends that place fire grate top are suspended on respectively on inlet box and the air outlet box tube sheet, blast inlet and air outlet communicate in inlet box and air outlet box top center respectively or a side communicates, said exhaust gases passes is the burner hearth throat that forms by by tilting face arch and staged or tilting rear arch, after the transversal flow U-shaped tube bank outside surface, discharge from the smoke outlet that is located at rear portion or side lower part.

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

1, U-shaped tube bank is suspended on the tube sheet of bellows, so the thermal expansion freedom, reliable operation, a small amount of damage can be blocked up, damage in a large number interchangeable, so prolonged complete machine work-ing life.

2, because of having adopted enhancement of heat transfer measure such as threaded pipe, can improve 1.5～1.8 times of coefficient of heat emission, because of having adopted the tube bank of minor diameter U-shaped, in same space, can increase heating surface area again, therefore improve thermo-efficiency, weight reduction and size.

3, adopt the multiple duct structure, can reduce duct resistance, and can provide stable different wind-warm syndrome and different heat supplieds simultaneously,, also the air channel series connection can be used, required wind-warm syndrome is provided so can reduce the operation electricity charge and save the distribution requirement according to requirement of engineering.

The accompanying drawings preferred embodiment of the utility model.

Fig. 1 is a Facad structure synoptic diagram of the present utility model.

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

Fig. 3 is a vertical view of the present utility model.

Fig. 4 is a shell-and-tube preheater structural representation.

Fig. 5 is a heat pipe-type preheating tube structural representation.

As Figure 1-3, the utility model is made up of coal bunker 1, body of heater 18, fire grate 4, blast inlet 10, air outlet 11, slag notch 8, smoke outlet 9, fire door 2 etc.U type tube bank 6 is located at the top of fire grate 4, can form by one or more groups, every group by inlet box 15, air outlet box 13 and the U-shaped tube bank of hanging thereon constitute, the two ends of U-shaped pipe are welded in respectively by advancing that division plate 14 separates, air outlet box (also can be independent advancing, air outlet box) on the tube sheet 12, blast inlet 10 and air outlet 11 communicate in inlet box and air outlet box top center respectively or side communicates (among the figure 10 ', 11 '), this structure can provide different wind-warm syndrome and different heat supplieds simultaneously according to user's needs, and also the air channel series connection can be used provides required wind-warm syndrome.The transverse ends of U-shaped tube bank tube sheet is fixed on the steelframe 16 with bolt 19.The U-shaped tube bank can adopt threaded pipe to make to improve heat transfer coefficient, and the U-shaped pipe of high-temperature zone can adopt on heat-stable material or the common steel tube and be coated with high-temperature resistant coating, can be arch casing 17 into and out of bellows, also can be rectangular box.The utility model burner hearth also can be tilting by tilting face arch 3 with staged rear arch 7() to form, flue gas is by discharging from the smoke outlet 9 that is located at stove rear portion or side lower part after the burner hearth throat 5 transversal flow U-shapeds tube bank outside surface.Shown in Fig. 3,4,5, the utility model is provided with shell-and-tube preheater 20 or heat pipe-type preheater 21 at the smoke outlet place, with the waste heat of recovery flue gas, and further improves thermo-efficiency.As shown in Figure 4, air W _KAdopt three backhauls (also can adopt two return formula or four backhauls) to enter,, deliver to the blast inlet 10 of hot-air channel from the wind of lower air outlet 24 output preheatings through behind three transversal flow threaded flues from top blast inlet 23, or heat supply separately, flue gas W _YMake progress by smoke pipe from following smoke-box 25, discharge from smoke outlet 22.Equally as shown in Figure 5, the heat pipe heating zone 28 that the flue gas that comes out from smoke outlet 9 directly washes away heat pipe-type preheater 21, leading to smoke outlet 29 then discharges, the cooling section 27 of air transversal flow heat pipe-type preheater, lead to air outlet 26, the air of preheating is sent into again in the blast inlet 10 of hot-air channel, or heat supply separately.The utility model can move to hot-air channel the rear of fire grate from fire grate top, make it to reduce the height of hotblast stove.

Claims

1, a kind of horizontal high life hotblast stove, have body of heater, coal bunker, fire grate, hot-air channel, exhaust gases passes, blast inlet, air outlet and smoke outlet, it is characterized in that said hot-air channel is made up of the U-shaped tube bank that one or more groups two ends that place fire grate top are suspended on respectively on inlet box and the air outlet box tube sheet, blast inlet and air outlet communicate in inlet box and air outlet box top center respectively or a side communicates, said exhaust gases passes is the burner hearth throat that forms by by tilting face arch and staged or tilting rear arch, after the transversal flow U-shaped tube bank outside surface, discharge from the smoke outlet that is located at rear portion or side lower part.

2, hotblast stove as claimed in claim 1 is characterized in that the U-shaped pipe adopts threaded pipe (or seamless tube) to make.

3,, it is characterized in that the smoke outlet place is provided with shell-and-tube or heat pipe-type preheating tube as claim 1,2 described hotblast stoves.

4, hotblast stove as claimed in claim 3 is characterized in that hot-air channel is located at the rear of fire grate.