CN209876905U - Mixed smoke chamber ash handling equipment in boiler cyclone export - Google Patents

Abstract

The utility model relates to a mixed smoke-chamber ash handling equipment in boiler cyclone export, it belongs to cyclone ash handling field, installs in original mixed smoke-chamber, fixedly connected with annular soot blower on the bottom platform of mixed smoke-chamber, be equipped with the inlet port on the annular soot blower, the air inlet arrives the distance of mixing two walls of smoke-chamber equals, the air inlet is connected with L type soot blower, the L type soot blower other end is connected with outside air supply, all be equipped with the gas blow hole above annular soot blower, the L type soot blower, this device can avoid the flying dust to pile up at mixed smoke-chamber platform, has improved the fail safe nature of boiler, guarantees boiler normal operating.

Description

Mixed smoke chamber ash handling equipment in boiler cyclone export

Technical Field

The utility model relates to a cyclone removes ash field, concretely relates to mixed smoke chamber ash handling equipment in boiler cyclone export.

Background

The circulating fluidized bed boiler can realize in-furnace desulfurization, low nitrogen emission and wide application of fuels, so that the circulating fluidized bed boiler is widely selected, the outlet of the central cylinder of the cyclone separator and the mixed flue of the circulating fluidized bed boiler in the market have larger volumes, and the bottom of the circulating fluidized bed boiler is generally designed into a horizontal structure. When the boiler operates, particularly when the boiler operates at low load, fly ash particles carried by high-speed flue gas which is not separated by the cyclone separator (including secondary lifting) are instantaneously expanded due to the flue gas, the speed is reduced, the fly ash particles are deposited on a platform at the outlet of a central cylinder of the cyclone separator and the bottom of a mixing flue under the action of gravity, and along with the accumulation of the operating time, fly ash with the height of more than 1.5 meters is fully accumulated on the platform.

SUMMERY OF THE UTILITY MODEL

The utility model provides a boiler cyclone exports mixed smoke chamber ash handling equipment, the purpose can avoid the flying dust to pile up at mixed smoke chamber platform, has improved the fail safe nature of boiler, guarantees boiler normal operating.

The utility model adopts the technical scheme as follows:

the utility model provides a mixed smoke-chamber ash handling equipment in boiler cyclone export, includes original mixed smoke-chamber and cyclone export on the bottom platform of mixed smoke-chamber, cyclone export fixedly connected with annular soot blower pipe, be equipped with the air inlet on the annular soot blower pipe, the air inlet arrives the distance of mixing two walls of smoke-chamber equals, the air inlet is connected with L type soot blower pipe, the L type soot blower pipe other end is connected with outside air supply, all be equipped with the gas hole above annular soot blower pipe, the L type soot blower pipe.

Furthermore, the number of the annular soot blowing pipes is two, a connecting pipe is connected between the two annular soot blowing pipes, a partition plate is arranged in the middle of the connecting pipe, the partition plate is positioned on a vertical bisector of a central line of the boiler or an outlet central line of the cyclone separator, and an air blowing hole is formed in the upper surface of the connecting pipe.

Further, the annular soot blowing pipe is divided into a closed soot blowing pipe and a non-closed soot blowing pipe, and the non-closed soot blowing pipe is an annular pipe with a notch on one side.

Further, the gas adopted by the external gas source is compressed air.

Furthermore, the annular soot blowing pipe, the L-shaped soot blowing pipe and the connecting pipe are all fixed on a bottom platform of the mixed smoke chamber through U-shaped drag hooks.

Furthermore, the annular soot blower pipe, the L-shaped soot blower pipe and the connecting pipe are all made of heat-resistant and oxidation-resistant materials, and the U-shaped drag hook is made of heat-resistant ribs.

Further, the blowing holes in the annular soot blowing pipe blow air obliquely upwards outside the annular soot blowing pipe, and the included angle between the blowing direction of the blowing holes in the annular soot blowing pipe and the horizontal plane ranges from 45 degrees to 65 degrees.

Furthermore, the blowing holes on the L-shaped soot blowing pipe and the connecting pipe blow air obliquely upwards, and the included angle range between the blowing direction of the blowing holes on the L-shaped soot blowing pipe and the connecting pipe and the horizontal plane is 0-15 degrees.

Furthermore, a pneumatic valve is arranged on the L-shaped soot blowing pipe and is positioned outside the mixing smoke chamber.

The utility model discloses an useful part lies in:

(1) the utility model discloses the contained angle scope of the gas hole of annular soot blower pipe and horizontal plane is 45 degrees to 65 degrees, is responsible for blowing the peripheral accumulational flying dust of cyclone export (circular), and the gas hole on L type soot blower pipe and the contact pipe is 0 to 15 degrees with horizontal plane contained angle scope, is responsible for blowing the flying dust of platform bottom, annular soot blower pipe and L type soot blower pipe and contact pipe are mutually supported, blow up the flying dust, guarantee boiler normal operating.

(2) The utility model discloses utilize the pneumatic valve, the switch is convenient swift, utilizes high-pressure compressed air to blow up the deposition promptly, has avoided a large amount of air to get into again and has mixed the smoke chamber and make the flue gas oxygen content too big, and then influences the fume emission index.

Drawings

FIG. 1 is a schematic structural diagram of an ash removal device of a mixed smoke chamber at an outlet of a cyclone separator of a boiler.

Fig. 2 is a schematic diagram of the position of the mixing smoke chamber of the present invention.

FIG. 3 is a schematic view of the structure of a closed type annular lance tube and a non-closed type annular lance tube.

FIG. 4 is a sectional view of the blowing hole of the ring-shaped lance tube.

FIG. 5 is a schematic view of the air outlets on both sides of the L-shaped lance tube and the connecting tube.

FIG. 6 is a cross-sectional view of the U-shaped hook for fixing the lance tube or the interconnecting tube.

In the figure, 1, a cyclone separator outlet, 2, a mixed smoke chamber, 3, a tail flue, 4, a bottom platform, 5, an annular soot blowing pipe, 6, a U-shaped drag hook, 7, an L-shaped soot blowing pipe, 8, a pneumatic valve, 9, a wall, 10, a connecting pipe, 11, a partition board, 12 and an air inlet.

Detailed Description

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1-6, a mixed smoke chamber ash removing device in boiler cyclone export, install in original mixed smoke chamber 2, mixed smoke chamber 2 is located between original cyclone export 1 and afterbody flue 3 entry, fixedly connected with annular soot blower 5 on mixed smoke chamber 2's the bottom platform 4, be equipped with air inlet 12 on the annular soot blower 5, in order to balance the atmospheric pressure of annular soot blower 5, the distance of air inlet 12 to two walls 9 of mixed smoke chamber 2 equals, air inlet 12 is connected with L type soot blower 7, the L type soot blower 7 other end is connected with outside air supply, the gas that outside air supply adopted is compressed air, annular soot blower 5, all be equipped with the gas blow hole above the L type soot blower 7.

The utility model discloses annular soot blower pipe 5 is equipped with two, two be connected with between annular soot blower pipe 5 and manage 10, be equipped with baffle 11 in the middle of the pipe 10, on baffle 11 was located the central line of boiler or the perpendicular bisector of 1 central line of cyclone export, the upper face of pipe 10 was equipped with the gas hole of communicating.

The utility model discloses annular soot blower 5 divide into closed type annular soot blower and non-closed type annular soot blower, and non-closed soot blower is the annular pipe that one side has the breach. When the outlet 1 of the cyclone separator is tangent to the furnace wall of the mixing smoke chamber 2, a non-closed annular soot blowing pipe is adopted; when the outlet of the cyclone separator is at a certain distance from the front wall of the mixing smoke chamber, a closed annular soot blowing pipe is adopted.

The utility model discloses annular soot blower pipe 5, L type soot blower pipe 7, contact pipe 10 are all fixed on bottom platform 4 of mixing smoke chamber 2 through U type drag hook 6, and U type drag hook 6 that is equipped with can be outside at mixing smoke chamber 2 with annular soot blower pipe 5, L type soot blower pipe 7, contact pipe 10 firmly fix on bottom platform 4.

The utility model discloses ash handling equipment installs in mixing smoke chamber 2, and boiler flue gas and flying dust temperature are very high, very easily takes place pyroxidation and carbonization phenomenon, so annular soot blower pipe 5, L type soot blower pipe 7, contact pipe 10 all adopt heat-resisting anti-oxidant material to make, and U type drag hook 6 adopts heat-resisting muscle to make.

The utility model discloses blow in the hole of blowing on the annular soot blower pipe 5 upwards blows to annular soot blower pipe 5 is outer to one side, and the flying dust descends downwards in the top of bottom platform 4, in order to blow the flying dust that descends fully, and the hole of blowing on the annular soot blower pipe 5 direction of blowing is 45 degrees to 65 degrees with the contained angle scope of horizontal plane, reaches the biggest scope of blowing, and annular soot blower pipe 5 numerous holes become the horn shape when blowing the ash, breaks the decline state of flying dust.

The utility model discloses blow in the gas hole slant on L type blown ash pipe 7 and the contact pipe 10, blow up the flying dust that bottom platform 4 descended for cooperation annular blown ash pipe 5, the gas hole direction of blowing on L type blown ash pipe 7 and the contact pipe 10 is 0 to 15 degrees with the contained angle scope of horizontal plane, makes the flying dust that is close to bottom platform 4 blown.

The utility model discloses be equipped with pneumatic valve 8 on the L type soot blower 7, pneumatic valve 8 is located 2 outsides in the mixed smoke chamber, and pneumatic valve 8's electric control button installs and is controlled by the span on the boiler control panel, regularly blows the ash on every class.

The utility model discloses regard compressed air as the soot blowing medium, but not limited to the air, also can utilize steam etc..

It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes, modifications and/or alterations to the present invention may be made by those skilled in the art after reading the technical disclosure of the present invention, and all such equivalents may fall within the scope of the present invention as defined by the appended claims.

Claims (9)

1. The utility model provides a mixed smoke chamber ash handling equipment in boiler cyclone export, includes original mixed smoke chamber and cyclone export, its characterized in that: mix on the bottom platform of smoke box, cyclone export fixedly connected with annular soot blower pipe, be equipped with the air inlet on the annular soot blower pipe, the air inlet arrives the distance of two walls in mixed smoke box equals, the air inlet is connected with L type soot blower pipe, the L type soot blower pipe other end is connected with outside air supply, all be equipped with the gas hole above annular soot blower pipe, the L type soot blower pipe.

2. The boiler cyclone outlet mixing smoke chamber ash removing device of claim 1, characterized in that: the two annular soot blowing pipes are connected with one another through a connecting pipe, a partition plate is arranged in the middle of the connecting pipe and located on a central line of a boiler or a perpendicular bisector of an outlet central line of the cyclone separator, and an air blowing hole is formed in the connecting pipe.

3. The boiler cyclone outlet mixing smoke chamber ash removing device of claim 1, characterized in that: the annular soot blowing pipe is divided into a closed soot blowing pipe and a non-closed soot blowing pipe, and the non-closed soot blowing pipe is an annular pipe with a notch on one side.

4. The boiler cyclone outlet mixing smoke chamber ash removing device of claim 1, characterized in that: the gas adopted by the external gas source is compressed air or steam.

5. The boiler cyclone outlet mixing flue gas chamber ash removal device of claim 2, wherein: the annular soot blowing pipe, the L-shaped soot blowing pipe and the connecting pipe are all fixed on a bottom platform of the mixed smoke chamber through U-shaped drag hooks.

6. The boiler cyclone outlet mixing flue gas chamber ash removal device of claim 5, wherein: the annular soot blowing pipe, the L-shaped soot blowing pipe and the connecting pipe are all made of heat-resistant and oxidation-resistant materials, and the U-shaped drag hook is made of heat-resistant ribs.

7. The boiler cyclone outlet mixing smoke chamber ash removing device of claim 1, characterized in that: and the blowing holes in the annular soot blowing pipe blow air obliquely upwards outside the annular soot blowing pipe, and the included angle between the blowing direction of the blowing holes in the annular soot blowing pipe and the horizontal plane ranges from 45 degrees to 65 degrees.

8. The boiler cyclone outlet mixing flue gas chamber ash removal device of claim 6, wherein: and the blowing holes on the L-shaped soot blowing pipe and the connecting pipe blow air obliquely upwards, and the included angle between the blowing direction of the blowing holes on the L-shaped soot blowing pipe and the horizontal plane ranges from 0 degree to 15 degrees.

9. The boiler cyclone outlet mixing smoke chamber ash removing device of claim 1, characterized in that: and the L-shaped soot blowing pipe is provided with a pneumatic valve, and the pneumatic valve is positioned outside the mixed smoke chamber.