SU1464012A1 - Boiler unit - Google Patents

Abstract

The invention relates to a power system and n {can be used 8 boiler units equipped with regenerative air preheaters. the invention is to increase reliability by improving the operation of the seals of the air preheater. Flue gases are passed through regenerative air heaters 2, 3, 23, 24, 1 25 and 26, they give off heat to the heated air and enter the flue exhaust duct 11, From the latter by a gas blower 13, connected behind the valve 10, Exhaust flue gases are taken in the required amount and, through pipelines 6, 21 and 22, are injected into the location areas of the seals 4 in the air compartments 5 of the air heaters 2, 3, 23, 24, 25 and 26. The sealing gases enter through the gaps in the seals 4 air flow and, in a mixture with it - to boilers 1, 19 and 20. As a result, ensure aets selection exhaust flue gases from dymoudal common guide path 11 regardless of operating modes of the boiler 1, I9 and 20 and feed them in a desired amount without any restrictions to seal m3 povshaet that their reliability. 2 Il. 20 i (/)

Description

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The invention relates to a power system and can be used in boiler units equipped with regenerative air preheaters.

The purpose of the invention is to increase reliability by improving the operation of air heater seals.

FIG. 1 shows a pseudo unit; Fig. 2 shows a boiler plant, Q water flows to a common smoke exhaust path equipped with a boiler unit.

The boiler unit contains boiler 1 and regenerative rotary air heaters 2 and 3 with radial

and axial seals 4 between their 15 air paths 5 and the smoke paths 7 connected bypass pipe 6. The bypass pipe 6 is connected to paths 7 via seals 4. Each path 7 .20

: connected to boiler 8 using a steam generator I, and the exhaust chimney 9 with the valve 10 - to the common g of the smoke exhausting path P. To the bypass pipeline 6 through the bypass 25 nozzle 12 with the gas blower 13 the exhaust chimney 9 is connected to the air heater 3,

In addition, the unit contains a bypass line 14, connecting from-30 water shchi} 1 chimney 9 air heater 3 in the zone to jam 2 with path 11 ,, and the bypass duct 12

 with the gas blower 13 is connected to the chimney 9 in the area after the rear door 10. The T2 nozzle has a control valve 15 "For supplying air to the boiler 1 there are blower fans 16 connected to the air preheaters 2 and 3 with supply pipes 40 17, and air heaters 2 and 3 are connected, with boiler 1 by discharge lines 18.

If the boiler plant contains, in addition to boiler 1, boilers 19 and 20, then the inlet pipe 12 is connected to the bypass pipes 21 and 22 of their air preheaters 23-26 with line 27.

The work of the boiler unit is as follows.

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11 and further through the chimney to the at-: Mososphere.

The gas blower 13 takes in the required amount without any restrictions exhaust flue gases from the general smoke-removing tract 11 and injects them through pipelines 6.21 and 22 into the distribution zones of the seals 4 in the air compartments 5 of the regenerative air preheaters 2, 3, 23-26.

The pressure of sealing gases sets with higher than air pressure, and is regulated by valves 15. The sealing flue gases, when compacted, flow through the gaps in the seals 4 around the circumference of the rotors into the air and mixed with it to the boilers 1, 19

and 20.

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Thus, due to the connection of the gas blower suction 13 behind the shut-off valve 10, the passage of fume gases through line 14 after the air preheater 3 to the common exhaust pipe 11 and the supply of sealing gases to the seals 4 of all regenerative air preheaters, the exhaust smoke is removed. gases from the common smoke path 11, regardless of the operating modes of the boilers f 19 and 20, the technical condition and operating modes of their regenerative air preheaters, without any restrictions on the number of drawers gh gases.

Claims (1)

The formula of the invention. neither A boiler unit containing regenerative rotary air heaters with seals between their air: 1 gi And connected smoke pipelines bypass pipe, each of which is connected to the boiler through a chimney to the boiler, and a chimney with a valve to the common smoke pipe. th pipe bypass The flue gases formed during the burning of fuel lines pass through the heat exchange surface installed in the rotating rotors of the regenerative air heaters 2 3, 23-26 with heat recovered to the air pumped through them by the fan 16 to the chambers 1, 19 and 20 122 The shut-off valve 10 on the exhaust chimney 9 after the regenerative air heater 3 is closed by the HocTbio floor, the flue gases from it are discharged to the smoke exhaust tract 11 via the bypass line 14. From the remaining air heaters 2, 23-26, the gases directly through the chimneys 9 are discharged to the common smoke path 11 and further through the chimney to the at-: Mososphere. The gas blower 13 takes in the required amount without any restrictions exhaust flue gases from the common smoke path 11 and injects them through pipelines 6.21 and 22 into the expansion zones of seals 4 in the air compartments 5 of the regenerative air heaters 2, 3, 23-26. The pressure of the sealing gases is set higher than the air pressure, and is regulated by valves 15. The sealing flue gases during sealing flow through the gaps in the seals 4 around the circumference of the rotors into the air and mixed with it to the boilers 1, 19 and 20. I Thus, due to the connection of the gas blower suction 13 behind the shut-off valve 10, the passage of the fumes from the gases along the main line 14 after the air-. heating heater 3 to the common smoke exhaust path 11 and supplying sealing gases to the seals 4 of all regenerative air heaters provides for the removal of exhaust flue gases from the common smoke exhaust path 11, regardless of the operating modes of the f 19 and 20 boilers, technical condition and operating modes of their regene - air heaters without any restrictions on the amount of exhaust gases. The formula of the invention. neither A boiler unit containing regenerative rotary air heaters with seals between their air: 1 gi And connected smoke piping bypass pipe, each of which is connected to the boiler through a chimney to the boiler, and a chimney with a valve to a common smoke path. pipeline bypass31464012 A gas pipe with a gas blower is connected to the seals, it additionally has a flue pipe from one of the air preheaters, which is different in order to increase reliability by improving performance. There is a bypass line connecting the exhaust chimney of the aforementioned air heater to a damper with a dush-exhaust pipe before the valve. - / (  of the seals, it additionally contains a bypass line connecting the exhaust chimney of the aforementioned air preheater to the valve with the duster. s. / (