CN205156019U - From opening and close formula boiler flue gas pressure relief device - Google Patents

Abstract

The utility model belongs to the technical field of a technique that the quick pressure release of boiler flue gas and specifically relates to a from opening and close formula boiler flue gas pressure relief device, include the explosion vent and pass the pressure releasing pathway that the sediment was fought, pressure releasing pathway set up being close to the inside wall department that the sediment was fought, still include breather pipe, drain and baffle, vertical, the slope of breather pipe set up on the inside wall that the sediment was fought, its lower extreme is located the sediment bottom of fighting, pressure releasing pathway mouth in the mouth of pipe of lower extreme is fought corresponding to the sediment and with the pressure releasing pathway intercommunication, the upper end of breather pipe is higher than sediment fill water level, fights the pressure releasing pathway bottom in the outside at the sediment and is provided with the drain. The utility model has the advantages of reasonable structure, prevent to block up the explosion vent, ensure the fast enough fast pressure release of flue gas pressure energy that the boiler produced in the twinkling of an eye to protection boiler safety steady operation.

Description

From open-close type boiler smoke pressure relief device

Technical field

The utility model relates to a kind of technical field for boiler smoke quick pressure releasing, specifically a kind of from open-close type boiler smoke pressure relief device.

Background technology

Adopt the station boiler of balanced draft mode, when boiler normally runs, after being sent to the air of burner hearth, fuel combustion, drain into chimney, keep certain pressure balance, due to the pulsation of burning, vacuum table has slight fluctuation, and combustion chamber draft generally maintains between-20 to-80Pa.When boiler combustion occurs abnormal, furnace pressure fluctuation scope is very large, can affect unit operation security, will cause chaser of putting out a fire time serious.

The bulk coking of boiler furnace is dropped suddenly in process, destroys burner hearth combustion and stablizes, cause negative pressure in burner hearth significantly to swing; When coke button falls into slag bucket sealing water; produce a large amount of steam to rise; form shock wave, put out the spraying burner fire nozzle that part is being burnt, cause local fire extinguishment or moment detonation in stove; cause flue gas pressures fluctuation in boiler; rise instantaneously when burner hearth flue gas pressures or decline excessive, meeting or exceeding protection act value (each power plant furnace pressure protection definite value is different, generally at ± about 2000Pa); trigger boiler main fuel trip, cause boiler extinguishment.Falling Jiao causes the time of disturbance in stove very short, generally only has 1.5-3 second, relies on personnel adjustment to come hardly may.Existing boiler bottom does not design flue gas pressure release and arranges, and how to be released fast by the boiler smoke pressure produced instantaneously is the technical issues that need to address.

Summary of the invention

The utility model is the flue gas pressures quick pressure relief device guaranteeing that boiler produces instantaneously, simple, practical, efficient.

The technical solution adopted in the utility model is: a kind of from open-close type boiler smoke pressure relief device, comprise explosion proof door and through slag bucket pressure release passage, explosion proof door is arranged on pressure release passage outboard end, it is characterized in that: described pressure release passage is arranged on the madial wall place near slag bucket, also comprise breather pipe, sewage draining exit and baffle plate, described breather pipe is vertical, be inclined on the madial wall of slag bucket, its lower end is positioned at bottom slag bucket, the mouth of pipe of lower end corresponds to the pressure release passage mouth in slag bucket and is communicated with pressure release passage, the upper end of breather pipe is higher than slag bucket water level, the cover plate preventing lime-ash from falling into is provided with in the upper end of breather pipe, cover plate is provided with passage, cover plate and breather pipe are for being articulated and connected, be provided with sewage draining exit bottom pressure release passage outside slag bucket, shutter is combined in sewage draining exit place, to open or close sewage draining exit, baffle plate is provided with sealing device, seals sewage draining exit during flapper closure sewage draining exit.

As a kind of preferred structure of the present utility model, breather pipe is that rectangular pipeline is established in cross section, and breather pipe and slag bucket madial wall are welded to connect, and arranges stiffener, at breather pipe outer setting flame retardant coating between that slag bucket wall that breather pipe is adjacent with slag bucket madial wall.

Further, described explosion proof door top is by the Flange joint of hinge and pressure release passage outer end, on flange, install the position of hinge leaf and be also provided with stopping means, the contact position of explosion proof door and flange is provided with the scraps of paper, and these scraps of paper are pasted on the outside of explosion proof door and flange.

Further, stretch out part pressure release passage outside burner hearth in the shape that is inclined upwardly, sewage draining exit is positioned at slag bucket place.

Coke button normally drops along slag bucket wall, produce a large amount of gases at high pressure instantaneously, breather pipe and pressure release passage are arranged on the madial wall place near slag bucket by the utility model, the position of breather pipe is comparatively near apart from the coke button position that falls, and produced high pressure gas physical efficiency can be entered pressure release passage by breather pipe fast and discharge through explosion proof door.Boiler can be quick by explosion proof door, instant open and carry out pressure release, significantly can reduce having a strong impact on of unit safety being caused because of combustion chamber draft unusual fluctuations.Breather pipe top is higher than slag bucket water level and arrange cover plate, can prevent pulp water or lime-ash from entering blocking breather pipe, causes breather pipe pressure release to lose efficacy; The utility model also arranges sewage draining exit bottom pressure release passage, by sewage draining exit, the coke button being deposited in pressure release passage mouth place can be disposed, prevent from blocking pressure release passage, guarantee that passage is unobstructed, make the gas pressure produced instantaneously discharge burner hearth fast, thus guarantee that boiler normally runs.

Accompanying drawing explanation

Fig. 1 is schematic diagram of the present utility model.

Detailed description of the invention

Now by reference to the accompanying drawings the utility model is further described, Fig. 1 is a kind of embodiment of the present utility model, comprise explosion proof door 1 and the pressure release passage 8 through slag bucket 2, explosion proof door 1 is arranged on pressure release passage 8 outboard end, described pressure release passage 8 is arranged on the madial wall place near slag bucket 2, and namely pressure release passage 8 is arranged on the edge of slag bucket 2.Also comprise breather pipe 3, sewage draining exit 5 and baffle plate, described breather pipe 3 is vertical, be inclined on the madial wall of slag bucket 2, its lower end is positioned at bottom slag bucket 2, and the mouth of pipe of lower end corresponds to the pressure release passage mouth in slag bucket 2 and is communicated with pressure release passage 8.The upper end of breather pipe 3, higher than slag bucket water level 4, is provided with the cover plate 6 preventing lime-ash from falling into, cover plate 6 is provided with passage in the upper end of breather pipe 3, cover plate 6 and breather pipe 3 are for being articulated and connected.Be provided with sewage draining exit 5 bottom pressure release passage 8 outside slag bucket 2, shutter is combined in sewage draining exit 5 place, to open or close sewage draining exit 5, baffle plate is provided with sealing device, seals sewage draining exit 5 during flapper closure sewage draining exit 5.

In the present embodiment, breather pipe 3 is for establishing rectangular pipeline in cross section, and breather pipe 3 and slag bucket madial wall are welded to connect, and leave appropriate expansion space between breather pipe 3 and slag bucket wall, and the breather pipe 3 of rectangle is convenient to manufacture, and also facilitates and is connected with slag bucket wall.Between that slag bucket wall that breather pipe 3 is adjacent with slag bucket madial wall, stiffener 7 is set, at breather pipe 3 outer setting flame retardant coating.At breather pipe 3 outer setting flame retardant coating.Described explosion proof door 1 top is by the Flange joint of hinge and pressure release passage 8 outer end, also stopping means is provided with at flange, hinge position, prevent dead-weight explosion proof door 1 from excessively causing explosion proof door 1 cannot to reset closedown because of pressure release action, stopping means can arrange parallel limiting plate in explosion proof door 1 hinge both sides and carry out mechanical position limitation, reset after explosion proof door 1 can be made to open closedown, prevents explosion proof door 1 from leaking gas.Explosion proof door 1 is provided with the scraps of paper with the contact position of flange, these scraps of paper are pasted on the outside of explosion proof door 1 and flange, whether arrange the scraps of paper to be conducive to observation and explosion-proof door 1 and to open, paper slip, operating personnel can judge pressure relief device whether action intuitively if disconnecting the mark as relief valve action.The utility model by the part pressure release passage 8 that stretches out outside burner hearth in the shape that is inclined upwardly, can also be shown in a angle in accompanying drawing.Sewage draining exit 5 is positioned at slag bucket 2 place, and the coke button of accumulation can be made all to be positioned near the lower position of pressure release passage 8 and sewage draining exit 5, is convenient to the long-pending coke button of thoroughly cleaning.

Cover plate 6 in the utility model can be plate armature, and also can be the structure of curved slab or conical plate, the cover plate in the present embodiment be conical plate structure.

The utility model have rational in infrastructure, prevent blocking, guarantee the feature that pressure releases fast.

Claims (4)

1. one kind from open-close type boiler smoke pressure relief device, comprise explosion proof door and the pressure release passage through slag bucket, explosion proof door is arranged on pressure release passage outboard end, it is characterized in that: described pressure release passage is arranged on the madial wall place near slag bucket, also comprise breather pipe, sewage draining exit and baffle plate, described breather pipe is vertical, be inclined on the madial wall of slag bucket, its lower end is positioned at bottom slag bucket, the mouth of pipe of lower end corresponds to the pressure release passage mouth in slag bucket and is communicated with pressure release passage, the upper end of breather pipe is higher than slag bucket water level, the cover plate preventing lime-ash from falling into is provided with in the upper end of breather pipe, cover plate is provided with passage, cover plate and breather pipe are for being articulated and connected, be provided with sewage draining exit bottom pressure release passage outside slag bucket, shutter is combined in sewage draining exit place, to open or close sewage draining exit, baffle plate is provided with sealing device, seals sewage draining exit during flapper closure sewage draining exit.

2. according to patent requirements 1 from open-close type boiler smoke pressure relief device, it is characterized in that: the cross section of described breather pipe is rectangle, breather pipe and slag bucket madial wall are welded to connect, and arrange stiffener, at breather pipe outer setting flame retardant coating between that slag bucket wall that breather pipe is adjacent with slag bucket madial wall.

3. according to patent requirements 1 from open-close type boiler smoke pressure relief device, it is characterized in that: described explosion proof door top is by the Flange joint of hinge and pressure release passage outer end, on flange, the position of hinge leaf is installed also is provided with stopping means, the contact position of explosion proof door and flange is provided with the scraps of paper, and these scraps of paper are pasted on the outside of explosion proof door and flange.

4. according to patent requirements 1 from open-close type boiler smoke pressure relief device, it is characterized in that: stretch out part pressure release passage outside burner hearth in the shape that is inclined upwardly, sewage draining exit is positioned at slag bucket place.