CN2270888Y

CN2270888Y - Shell type fire-tube heating furnace

Info

Publication number: CN2270888Y
Application number: CN 96210730
Authority: CN
Inventors: 于守智; 林兆坤
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-05-04
Filing date: 1996-05-04
Publication date: 1997-12-17
Anticipated expiration: 2006-05-04

Abstract

The utility model discloses a pot shell formula fire tube heating furnace, including pot shell, stove courage bearing structure, middle smoke box, tobacco pipe, bellows and back smoke chamber, the key feature is that the stove courage comprises major diameter stove courage and the eccentric series connection of minor diameter stove courage, sets up a concentrated axial expansion festival at path stove courage rear portion, and middle smoke box is at the pot shell middle part, and many tobacco pipes are connected between middle smoke box and back smoke chamber, the utility model discloses capacious, can reach 7MW, manufacturing process is simple, uses the automated control of being convenient for, requires wide to used working medium, is suitable for using the raw water, and the oil field of oily sewage and crude oil is defeated for the technology heating furnace is gathered.

Description

The pan shell type fire barrel heating furnace

The utility model is a kind of burner that uses liquid fuel, gaseous fuel or oil-gas mixed burning, specifically a kind of pan shell type fire barrel heating furnace.

Existing heating furnace, as the used heating furnace of the mutual skill of oil field oil recovery, the flue diameter is little, the combustion space is little, fuel combustion is incomplete, peak power only reach 2,000,000 kilocalories/time, the exhaust gas temperature height, heat loss due to exhaust gas is big, the thermal efficiency is low, and design efficiency is at 70-80%, and operational efficiency only has 50-60%, undercapacity, waste of fuel is serious, often adopts 20-30 platform stove parallel for satisfying the demand, and this has also brought the low deficiency of automatic control level, because of adopting flame, it directly burns flue again, the overheated bulge of flue often occurs and burst, stipulate on the smaller hard flour pancake boiler standard for this reason, flue should add an expansion loop every 1 meter on structural design, to increase its rigidity, this makes the processing of flue become complicated undoubtedly.

The purpose of this utility model is, provides a kind of fuel combustion complete, thermal efficiency height, flue intensity height, pan shell type fire barrel heating furnace simple in structure.

Following mode can realize the utility model:

Form and comprise shell, flue, flue supporting construction, middle smoke box, smoke pipe, bellows and rear smoke chamber, its flue is made of major diameter flue and the eccentric series connection of minor diameter flue, a concentrated axial expansion joint is set at path flue rear portion, middle smoke box has many smoke pipes at the shell middle part between middle smoke box and shell rear head.

On big footpath flue and the path furnace outer wall a plurality of stiffening rings are set, to increase the rigidity of flue, stiffening ring horizontal side both sides are provided with annular ear, are installed with cylinder axis in the annular earhole, the cylinder axle bed is on the supporting construction that is fixed on the shell inwall, and this also is the supporting construction of flue.

For atmospheric pressure kiln, be provided with expansion tank on heating furnace top, the stokehold is provided with little water tank, and little water tank is communicated with expansion tank, also is provided with overflow pipe on the shell, and middle smoke box is by the steel plate welding fabrication, and inspection manhole is located at middle smoke box top.

The utility model capacity reach 6,000,000 kilocalories/time (7 megawatt), efficient is up to 92-94%, using under former water, oil-polluted water and the oil condition, the annual operational efficiency reaches 85-90%, flue intensity height, and furnace outer wall fouling, coking are few, and loosen easily to fall, smoke pipe need not remove cigarette ash, flue gas flow rate height, reach the 18-22 meter per second, use relatively primely to require widely, this heating furnace structure is simple, be convenient to automatic management, can move under normal pressure, or the operation of pressure is arranged, pressure can be 0.4MPa, 0.7MPa.

Fig. 1 has the operating structure of pressure schematic diagram for the utility model;

Fig. 2 is that the A of Fig. 1 is to view;

Fig. 3 is the utility model normal pressure operating structure schematic diagram;

Fig. 4 is the supporting construction schematic diagram.

Embodiment 1:

With pan shell type fire barrel heating furnace that the operation of pressing is arranged is example, big footpath flue 5 is preceding, at the flue 5 afterbody ellipse head lower eccentric path flue 16 of connecting, flue 16 rear portions are provided with a concentrated axial expansion joint 18, in order to eliminate the thermal expansion of big path flue, this has fundamentally changed current smaller hard flour pancake boiler flue has an expansion joint every 1 meter need design, for increasing the rigidity of flue, on the outer wall of big footpath flue 5 and path flue 16, a stiffening ring 13 is set every 150-240cm, stiffening ring 13 is formed by being welded in the floor that becomes to connect the preface weldering on the furnace outer wall, stiffening ring 13 both sides are welded with the porose annular ear 14 of horizontal direction, be installed with cylinder axis 15 in the annular earhole, the cylinder axle bed is on supporting construction, when big path flue 5 and 16 expands, earrings 14 slides on cylinder axis 15, no matter flue is subjected to buoyancy, still gravity effect, the supporting structure that is welded on the shell inwall passes through cylinder axis 15, make big path flue 5 and 16 keep stable, and expand reposefully, middle smoke box 10 is arranged on the shell middle part, middle smoke box 10 is that two ends are the cylindrical vessel of ellipsoidal head, between middle smoke box 10 and shell 7 rear heads, be welded with the smoke pipe 11 that several seamless steel tube for boiler are formed, smoke pipe 11 also can be the spiral smoke pipe, to improve the biography one hot coefficient of smoke pipe, middle smoke box 10 links to each other with inspection manhole 8 by an expansion joint, smoke box 10 in the middle of the people can enter by manhole 8, maintenance smoke pipe 11 weld bonds, be provided with rear smoke chamber 17 at the heating furnace rear portion, rear smoke chamber 17 is divided into two parts by dividing plate, a part is the turning exhaust gases passes of the path flue and the second backhaul smoke pipe, another part is the exhaust gases passes of the 3rd backhaul smoke pipe and chimney, make smoke pipe become double-current journey, rear smoke chamber 17 high-temperature part tops are provided with big explosion proof door 9, on rear smoke chamber's 17 walls peep-hole is housed, observe combustion chamber 5 flame status by path flue 16,10 of middle smoke boxes are being slided on the rod by the round steel of channel-section steel supporting, middle smoke box 10 can slide on sliding rod, absorb the thermal expansion of smoke pipe 11, operational process: air is introduced into preceding bellows 2, during by burner 1, fully mix with the fuel that enters by burner 1, in the flue 5 of big footpath, reach completing combustion, flue gas enters rear smoke chamber 17 by path flue 16, smoke box 10 in the middle of entering by smoke pipe 11 again, flue gas returns rear smoke chamber 17 by middle smoke box 10 again by smoke pipe 11 again and is discharged to chimney, be heated and relatively primely enter in the shell 7 by inlet tube 4, the heating back is discharged by outlet 3,6 is the little explosion proof doors of bellows, prevent that flue gas explosion from damaging heating furnace, 12 is the heating furnace bearing.

Embodiment 2:

With the utility model shown in Figure 2 run time organization under normal pressure is example, this heating furnace shell communicates with atmosphere, its basic structure is identical with embodiment 1, different is to be provided with expansion tank 21 on heating furnace top, a little water tank 22 that is connected with expansion tank 21 is established in the stokehold, on the little water tank 22 water gage is housed, because be that normal pressure is done mutually, middle smoke box 10 is welded by steel plate and gets final product, be welded into square in the present embodiment, the top of smoke box 10 also was provided with overflow pipe 19, automatic overflow when water level exceeds the overflow mouth of pipe in the middle of inspection manhole 8 was located on the shell.

Water inlet pipe 4 of the present utility model is located at shell 7 bottoms; outlet pipe 3 is located at shell 7 tops; at smoke pipe 11 with above the flue 5 of big footpath; when the heating furnace lack of water, water pump is found time, and dry combustion method phenomenon in combustion chamber can not take place; play the self-shield of heating furnace lack of water; hand hole, emptying, annex such as hydrophobic also are set on the heating furnace, enough spaces are arranged in the heating furnace, the people can enter boiler and clear up and keep in repair.

Claims

1, a kind of pan shell type fire barrel heating furnace, form and comprise shell, flue, flue supporting construction, middle smoke box, smoke pipe, preceding bellows and rear smoke chamber, it is characterized in that: described flue is made of major diameter flue and the eccentric series connection of minor diameter flue, a concentrated axial expansion joint is set at path flue rear portion, middle smoke box has many smoke pipes at the shell middle part between middle smoke box and shell rear head.

2, heating furnace according to claim 1 is characterized in that: on the outer wall of big footpath flue and path flue a plurality of stiffening rings are set, the stiffening ring both sides are provided with annular ear, are installed with cylinder axis in the annular earhole, and the cylinder axle bed is on supporting construction.

3, heating furnace according to claim 2 is characterized in that: stiffening ring becomes the floor of sequential welding to constitute by being welded on the furnace outer wall.

4, heating furnace according to claim 1 is characterized in that: it is the cylindrical vessel of a two ends band end socket that the middle smoke box of the heating furnace of pressure is arranged.

5, heating furnace according to claim 4 is characterized in that: middle smoke box links to each other with expansion joint with inspection manhole.

6, heating furnace according to claim 1 is characterized in that: little explosion proof door is set on the preceding bellows, and rear smoke chamber establishes on high-temperature part top a big explosion proof door.

7, heating furnace according to claim 1 is characterized in that: atmospheric pressure kiln is provided with expansion tank at an upper portion thereof, and the stokehold is provided with little water tank, little water tank is communicated with expansion tank, also be provided with overflow pipe on the shell, middle smoke box is by the steel plate welding fabrication, and inspection manhole is located at middle smoke box top.