CN2573872Y

CN2573872Y - Circulating fluidized-bed boiler dryoff over fuel oil lance

Info

Publication number: CN2573872Y
Application number: CN 02259333
Authority: CN
Inventors: 朱润保
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-10-14
Filing date: 2002-10-14
Publication date: 2003-09-17
Anticipated expiration: 2012-10-14

Abstract

The utility model relates to a drying furnace oil gun for a circulating fluidized bed boiler. An axis of a mixing pipe is provided with a blind hole, the left end of the blind hole is provided with a diffusion chamber, and the right end of the blind hole is provided with a mixing chamber. An ejector nozzle extends into the mixing chamber in a seal mode from the axis of the right end wall of the mixing pipe, and an oil supply pipe also extends into the mixing chamber from the right end wall of the mixing pipe. A rotational flow pipe with the open left end and the sealed right end is fixed outside the mixing pipe in the mode of the same axis, a secondary wind channel for rotational flow is formed between the inner hole wall of the rotational flow pipe and the outer cylindrical surface of the mixing pipe, and a plurality of baffles which are inclined in opposite directions are fixed between the mixing pipe at an outlet and the rotational flow pipe. One end of a secondary wind pipe for the rotational flow extends into the secondary wind channel for rotational flow in the seal mode from the right end wall of the rotational flow pipe, and the other end is communicated with compressed air. A straight flow pipe with the open left end and the sealed right end is fixed outside the rotational flow pipe in the mode of the same axis, the secondary wind channel for straight flow is formed between the straight flow pipe and the rotational flow pipe, one end of the secondary wind pipe for the straight flow extends into the secondary wind channel for straight flow in the seal mode from the right end wall of the straight flow pipe, and the other end is communicated with the compressed air. The utility model has the advantages of convenient control, high efficiency, energy saving and low manufacturing expenses, the utility model which can achieve the temperature needed by the drying furnace (drying) can be repeatedly used.

Description

The circulating fluidized bed boiler oil gun for drying out

(1), technical field

The utility model relates to a kind of circulating fluidized bed boiler oil gun for drying out, be mainly used in newly-built circulating fluidized bed boiler baker (doing), boil stove, combustion-supporting under daily open, come to a complete stop combustion and the accident conditions that also can be used for all kinds coal-fired power station boiler, coal-burned industrial boiler, or other needs interim equipment and the occasion of using oil gun.

(2), background technology

Equipment surface such as the slag cooler of newly-built CFBB are coated with one deck abrasionproof grog, for strengthening the abrasionproof clinker strength, prolong its service life, in the baking of intensification gradually (doing) that must carry out the abrasionproof grog after the construction about 50 ℃～800 ℃.

Present baker (doing) to newly-built circulating fluidized bed boiler, the general firewood top-pour oil method of using is carried out baker (doing), adopt this method to have many drawbacks: 1, in baker (doing) process because difficult control of temperature, furnace wall are heated inequality, so the furnace wall crackle that very easily causes, giving from now on, equipment safety operation stays accident potential.2, firewood baker (doing) is difficult to reach the high temperature about 800 ℃, so baker (doing) effect is bad.

If use the existing mechanical atomized oil gun to carry out baker (doing), also can't satisfy the baker (doing) that begins from low temperature.The mechanical atomization oil gun is to carry by oil feed pump pressure, mechanical atomization, exerts oneself that big (it is reported that present China mechanical atomization oil gun minimum is exerted oneself is about 1000kg/h～1200kg/h), thereby can't satisfy from 50 ℃ of initial bakers (doing) at all.The mechanical atomization Oil Gun is big, very easily causes device damage.The mechanical atomization oil gun needs huge and complicated systems such as oil feed pump, oil tank and oil-piping, very inconvenience of on-the-spot use.

(3), summary of the invention

In order to overcome the shortcoming of prior art, the utility model provides a kind of circulating fluidized bed boiler oil gun for drying out, and it not only can reach the required temperature of baker (doing), and control is convenient, and efficient, energy-conservation, can use repeatedly, and manufacturing expense is low.

The technical scheme in the invention for solving the technical problem is: there is the big blind hole in little two ends, centre of opening left in columned mixing tube axle center, the blind hole left end is a diffuser casing, right-hand member is a mixing chamber, one end of jet nozzle stretches into mixing chamber from the right-hand member wall axle center sealing of mixing tube, the other end communicates with compressed air by airduct of jet, one end of fuel feed pump also stretches into mixing chamber from the right-hand member wall sealing of mixing tube, and the other end communicates with fuel tank; The outer concentric of mixing tube is the cyclone pipe shut of left end opening right-hand member fixedly, form the swirl secondary air road between the external cylindrical surface of cyclone pipe inner hole wall and mixing tube, between the mixing tube in exit and cyclone pipe, fix the baffle plate of a plurality of opposite tilts, one end of swirl secondary air pipe stretches into the swirl secondary air road from the right-hand member wall sealing of cyclone pipe, and the other end communicates with compressed air; The outer concentric of cyclone pipe is the DC tube shut of left end opening right-hand member fixedly, forms the direct current secondary air duct between the two, and an end of direct current secondary air channel seals from the right-hand member wall of DC tube and stretches into the direct current secondary air duct, and the other end communicates with compressed air.

The utility model compared with prior art has following advantage:

1,, thereby do not need complex apparatus such as oil feed pump because utility model is to utilize wind of jet to produce negative pressure suction fuel oil.2, very easy to use, simple.When circulating fluidized bed boiler needs baker (doing) or boils stove, only need compressed air is connected to respectively the control valve of wind of jet, swirl secondary air, direct current secondary wind, oil tank fuel is connected to fuel regulator valve simultaneously, just can use.When not using, can very conveniently remove.3, oil pipe configuration adjustment valve can be regulated the amount of fuel size, can be at 8kg/h～400kg/h or regulate arbitrarily in larger scope according to need of work, thereby can very convenient control oven drying temperature.4, fuel feed pump does not have the operation of pressing, and guarantees that oil gun at the scene or other occasion security and the randomness used.5, because fuel feed pump does not have the operation of pressure, thereby can use general flexible pipe as fuel feed pump, for example fire welds the oxygen belt of usefulness etc.6, She Ji swirl secondary air, direct current secondary wind can in time be adjusted according to the flame combustion situation, guarantee that flame combustion is stable, and fuel oil reaches completing combustion, and is efficient, energy-conservation.7, can use environmental protection gases such as diesel oil, kerosene, gasoline or coal gas as fuel, also can use other flammable discarded poor oil.8, can use repeatedly, to compare manufacturing expense cheap with the mechanical atomization oil gun.9, this oil gun also can be used for the steady combustion of Industrial Boiler or station boiler or combustion-supporting.

(4), description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model jet nozzle first embodiment side view;

Fig. 3 is the utility model jet nozzle second embodiment side view;

Fig. 4 is the utility model jet nozzle the 3rd embodiment side view;

Fig. 5 is the utility model jet nozzle the 4th embodiment side view;

Fig. 6 is the utility model baffle arrangement schematic diagram;

Fig. 7 is the utility model fuel feed pump jet first embodiment side layout drawing;

Fig. 8 is the utility model fuel feed pump jet second embodiment side layout drawing;

Fig. 9 is the utility model fuel feed pump jet the 3rd embodiment side layout drawing;

Figure 10 is the utility model fuel feed pump jet the 4th embodiment side layout drawing.

(5), the specific embodiment

There is the big blind hole in little two ends, centre of opening left in columned mixing tube 4 axle center, and the blind hole left end is a diffuser casing 15, and right-hand member is a mixing chamber 14, as shown in Figure 1.Diffuser casing 15 reduces the gas mixture movement velocity, and with radial ejection, helps burning.Mixing chamber 14 effects are to make fuel oil fully to mix with high velocity air, and fuel oil is well atomized.One end of jet nozzle 13 stretches into mixing chamber 14 from the right-hand member wall axle center sealing of mixing tube 4, and the other end communicates with compressed air 10 by airduct 19 of jet.Described jet nozzle 13 can be the single injector of single hole, as shown in Figure 2, also can be the built up nozzle in 3,4,5 holes, shown in Fig. 3,4,5.Can use according to the Oil Gun size design, adopt built up nozzle to be intended to improve pumping efficiency.Behind jet nozzle 13 ejection high-speed airs, high velocity air produces negative pressure around the air-flow in the process of advancing, because the effect of negative pressure, fuel oil is inhaled into mixing chamber.

One end of fuel feed pump 7 stretches into mixing chamber 14 from the right-hand member wall sealing of described mixing tube 4, and the other end communicates with fuel tank 9.Oil-in can be designed to multiple modes such as single oil-in, end face honeycomb dish 16 oil-ins, circumference honeycomb circle 17 oil-ins and mixed-arrangement honeycomb coil 18 oil-ins, shown in Fig. 6,7,8,9.Its purpose is exactly for strengthening the atomizing of fuel oil.

Mixing tube 4 outer concentrics are the cyclone pipe 3 shut of left end opening right-hand member fixedly, form swirl secondary air road 6 between the external cylindrical surface of cyclone pipe 3 inner hole walls and mixing tube 4, between the mixing tube 4 in exit and cyclone pipe 3, fix the baffle plate 1 of a plurality of opposite tilts, as shown in Figure 6.One end of swirl secondary air pipe 12 stretches in the swirl secondary air road 6 from the right-hand member wall sealing of cyclone pipe 3, and the other end communicates with compressed air 10.12 effects of swirl secondary air pipe are timely aftercombustion required air, make fuel oil completing combustion.Design baffle plate 1 tangentially enters swirl secondary air, and effect is to strengthen the disturbance to flame, entrainments high-temperature flue gas simultaneously, and the gas mixture of heating oil gun spout makes the air quantity of spout ejection reach uniformity substantially, prevents that the spout local air flow is excessive.Controllable register 1 can be regulated the swirl strength of swirl secondary air.

Cyclone pipe 3 outer concentrics are the DC tube 2 shut of left end opening right-hand member fixedly, forms direct current secondary air duct 5 between the two, and an end of direct current secondary air channel 11 stretches in the direct current secondary air duct 5 from the right-hand member wall sealing of DC tube 2, and the other end communicates with compressed air 10.The effect of DC tube 2 is that according to combustion case in time the aftercombustion required air to reach purpose stable, completing combustion, cools off oil gun simultaneously when high temperature, prevents that oil gun from burning out.

Claims

1, a kind of circulating fluidized bed boiler oil gun for drying out, it is characterized in that: there is the big blind hole in little two ends, centre of opening left in columned mixing tube (4) axle center, the blind hole left end is diffuser casing (15), right-hand member is mixing chamber (14), one end of jet nozzle (13) stretches into mixing chamber (14) from the right-hand member wall axle center sealing of mixing tube (4), the other end communicates with compressed air (10) by an airduct of jet (19), one end of fuel feed pump (7) also stretches into mixing chamber (14) from the right-hand member wall sealing of mixing tube (4), and the other end communicates with fuel tank (9); The outer concentric of mixing tube (4) is the cyclone pipe (3) shut of left end opening right-hand member fixedly, form swirl secondary air road (6) between the external cylindrical surface of cyclone pipe (3) inner hole wall and mixing tube (4), between the mixing tube (4) in exit and cyclone pipe (3), fix the baffle plate (1) of a plurality of opposite tilts, one end of swirl secondary air pipe (12) stretches into swirl secondary air road (6) from the right-hand member wall sealing of cyclone pipe (3), and the other end communicates with compressed air (10); The outer concentric of cyclone pipe (3) is the DC tube (2) shut of left end opening right-hand member fixedly, form direct current secondary air duct (5) between the two, one end of direct current secondary air channel (11) stretches into direct current secondary air duct (5) from the right-hand member wall sealing of DC tube (2), and the other end communicates with compressed air (10).

2, oil gun according to claim 1 is characterized in that: described jet nozzle (13) can be the single injector of single hole, also can be the built up nozzle in 3,4,5 holes.

3, oil gun according to claim 1 is characterized in that: the oil-in of fuel feed pump (7) can be designed to single oil-in, end face honeycomb dish (16) oil-in, circumference honeycomb circle (17) oil-in and mixed-arrangement honeycomb coil (18) oil-in.