CN2172399Y

CN2172399Y - Horizontal internally burning 3-return wet back oil-burning boiler

Info

Publication number: CN2172399Y
Application number: CN 93234430
Authority: CN
Inventors: 李辉杰; 文任芝; 付家骝; 张佩兰
Original assignee: XIANGTAN BOILER FACTORY
Current assignee: XIANGTAN BOILER FACTORY
Priority date: 1993-07-31
Filing date: 1993-07-31
Publication date: 1994-07-20
Anticipated expiration: 2003-07-31

Abstract

The utility model relates to a horizontal internally burning 3-return wet back oil-burning boiler whose capacity is 4-10 t/h and whose pressure is 1.25-1.6 MPa. The pressure part of the boiler body of the horizontal internally burning 3-return wet back oil-burning boiler adopts a waveform internal boiler and a thread smoke pipe. A fire blocking wall is additionally built in the internal boiler. The tail portion of the horizontal internally burning 3-return wet back oil-burning boiler is designed into a full wet back rear smoke chamber. A 3-return is composed by adopting eccentric arrangement. The boiler shell, the internal boiler, the full wet back rear smoke chamber, and each pipe plate adopt the welding seam structure of a full butt joint type. The full wet back rear smoke chamber overcomes the phenomena of the short circuit of smoke and gas and the tail portion of the horizontal internally burning 3-return wet back oil-burning boiler burned out, enhances the heat efficiency, reduces the appearance temperature, and has good smoke eliminating and dust removing effect. The horizontal internally burning 3-return wet back oil-burning boiler has little steel consuming, light weight, compact structure, and convenient operation and maintenance.

Description

Horizontal internally burning 3-return wet back oil-burning boiler

The utility model is a kind of horizontal internal combustion three backhaul wetting back-type oil burning boilers.

The use of oil burning boiler is more and more at present, but the oil burning boiler that puts goods on the market now, the tail flue gas of its boiler body directly contacts with partition wall, partition wall perforation phenomenon often takes place easily, cause the flue gas short circuit, back smoke box burns out, and exhaust gas temperature increases suddenly, situations such as boiler capacity reduction are brought harmful effect to surrounding environment.For solving this shortcoming, the manufacturing firm that has takes at several water pipes of boiler back weldering, the introduction of foreign technology that has is welded a waterwall at afterbody, but these method effects are not ideal, high-temperature flue gas still flings the back wall, and the welding of waterwall plate and tube sheet can only be fillet welding, this in the requirement of strength of China's boiler pressure parts on never permission, because the suffered stress in commissure is too big, influence boiler life.The problems referred to above are deadly defects that oil burning boiler exists at present.

The purpose of this utility model provides a kind of high-temperature flue gas of avoiding and flings the back wall, can reduce boiler appearance temperature, improves the horizontal internal combustion three backhaul wetting back-type oil burning boilers of boiler thermal output.

The utility model is achieved in that horizontal internal combustion three backhaul wetting back-type oil burning boilers are by boiler body, combustion system, front smoke box, back smoke box, heat-insulation layer, chimney, carbonated drink instrumentation pipeline system and electric appliance control box constitute, the boiler body pressure-containing parts adopts corrugated flue and threaded flue, add in the flue and build a firebreak, be used for reflecting flue gas, to improve chamber temperature, afterbody is designed to full wetting back-type rear smoke chamber, take arranged off-centre, form three backhauls, shell, flue, rear smoke chamber adopts the full type welding line structure that docks with each tube sheet, thereby constitutes horizontal internal combustion three backhaul wetting back-type oil burning boilers.

This boiler is owing to adopt full wetting back-type rear smoke chamber, and high-temperature flue gas washes away the smoke-box inwall, and its heat is absorbed by the boiler water at the smoke-box back side, has reduced boiler appearance temperature, and flue gas again can't short circuit, so burnout phenomenon no longer appears in boiler tail.Improved boiler thermal output, the thermal efficiency is 91.1% high 9.1 percentage points with the ZBJ98011-88 regulation after tested, and energy-saving effect is remarkable, the annual over one hundred ton capable of saving fuel of every boiler, and social benefit is good.Because no longer short circuit of flue gas, smoke medicining dust-removing effect is good.Dust exhausting concentration 1.7-2.4mg/nm ³, the flue gas lingemann blackness is 0 degree, the boiler room noise is 79.7dB(A), meet national class area emission request.Boiler water level is carried out Automatic Control, and water inlet continuously makes steam pressure stable.This boiler stove internal combustion is stable, the foot of exerting oneself, and load adjustment ability is good, starts to boost soon.Boiler steel consumption is few, with the same parameter coal-burning boiler relatively, can consume 10 tons/platform of steel less, in light weight, compact conformation, operating maintenance are convenient.

Below in conjunction with accompanying drawing the utility model is described in further detail:

Fig. 1 is horizontal internal combustion three backhaul wetting back-type oil burning boiler structure charts

Fig. 2 is the boiler body cutaway view

With reference to Fig. 1, horizontal internal combustion three backhaul wetting back-type oil burning boilers by boiler body 1, combustion system 2, front smoke box 3, back smoke box 4, heat-insulation layer 5, chimney 6, carbonated drink instrumentation pipeline system 7, and electric appliance control box 8 constitute, its boiler body 1 pressure-containing parts adopts corrugated flue 9 and threaded flue 10, add in the middle of the flue 9 and build a firebreak 11, make the oil smoke gas after catching fire produce the reflection backflow in the combustion chamber, further improve chamber temperature, impel burning fully, firebreak 11 is the taper wall that a refractory brick is built into.Boiler body 1 afterbody is designed to full wetting back-type rear smoke chamber 12, rear smoke chamber 12 is made up of smoke-box front tube sheet 13 and smoke-box back tube sheet 14, the rear smoke chamber back side all is boiler water, high-temperature flue gas washes away the smoke-box inwall, its heat is absorbed by the boiler water of smoke-box periphery, flue gas again can't short circuit, make boiler tail burnout phenomenon no longer occur, and can reduce boiler appearance temperature, structure of boiler body is taked arranged off-centre (as shown in Figure 2), form three backhauls, make that the situation of being heated forms a high low area in the stove, the water cycle performance is good in the stove.Shell, flue, rear smoke chamber adopt the full type welding line structure that docks with each tube sheet, and the line expansion that produces because of temperature stress is absorbed by deformation, have reduced the stress of weld seam and have concentrated influence, have strengthened heat absorption capacity.For reducing boiler appearance temperature, adopt heat insulating material as heat-insulation layer 5, the appearance temperature is at 25 ° after tested--between 50 ℃, improved environmental condition.Boiler water level control is improved to Automatic Control by the two water level controls of original height and intakes continuously, makes steam pressure stable like this.Other modular construction is identical with existing oil burning boiler.Fuel oil sprays into after burner hearth catches fire via combustor, generates flue gas, and flue gas passes flue 9 and enters water back of the body smoke-box 12, is folded to enter the tube bank of first screw thread, changes the tube bank of second screw thread over to by front smoke box 3, flow to chimney 6 and discharges.The capacity of this oil burning boiler is 4--10T/h, and pressure is 1.25--1.6MPa.This boiler structure is simple, compact, in light weight, operating maintenance is convenient, applicable to departments such as light industry, weaving, food, chemical industry, hotel, hospitals.

Claims

1, a kind of horizontal internal combustion three backhaul wetting back-type oil burning boilers, it is by boiler body [1], combustion system [2], front smoke box [3], back smoke box [4], heat-insulation layer [5], chimney [6], carbonated drink instrumentation pipeline system [7] and electric appliance control box [8] constitute, it is characterized in that boiler body [1] adopts corrugated flue [9] and threaded flue [10], add in the flue [9] and build a firebreak [11], afterbody is designed to full wetting back-type rear smoke chamber [12], take arranged off-centre to form three backhauls, shell, flue, rear smoke chamber adopts the full type welding line structure that docks with each tube sheet, thereby constitutes horizontal internal combustion three backhaul wetting back-type oil burning boilers.

2, oil burning boiler according to claim 1 is characterized in that full wetting back-type rear smoke chamber ［ 12 ］ is made up of smoke-box front tube sheet ［ 13 ］ and smoke-box back tube sheet ［ 14 ］, and the back side of rear smoke chamber ［ 12 ］ is designed to the part of boiler body.

3, oil burning boiler according to claim 1 is characterized in that firebreak ［ 11 ］ is the taper wall that a refractory brick is built into.

4, oil burning boiler according to claim 1 is characterized in that boiler water level adopts Automatic Control to intake continuously.

5, oil burning boiler according to claim 1, the capacity that it is characterized in that this oil burning boiler is 4-10T/h, pressure is 1.25-1.6MPa.