SU932114A2 - Regenerative rotary water heater - Google Patents

Description

(B) REGENERATIVE ROTATING AIR HEATER The invention relates to heat generation, namely, regenerative rotating air preheaters, and can be used in boiler units of thermal power plants. St. No. 879158 is known for a regenerative rotary air heater containing a rotor and end sealing plates installed in a housing, dividing the shell into an air and gas compartment, and a recirculation pipe with a discharge and suction nozzle, the latter of which is adjacent to the end plate, and on the suction nozzle side On the cold side of the rotor, at the entrance to the gas compartment, an additional sealing plate O is installed. This air preheater provides a sufficiently complete suction of the flow shrinking it and returning it to the air path, thereby reducing the total flow of heat-exchanging media and increasing its efficiency, but does not prevent the flue gas from flowing into the air compartment, which, when present in ash particles and abrasive dust, causes accelerated wear of instruments and devices installed in the air truck The purpose of the invention is to reduce the flow of heat exchanging media, in particular - air and flue gases at the same time, and to increase the efficiency of the air preheater. This goal is achieved by the fact that the discharge pipe of the recirculation pipe is adjacent to the sealing plate located on the cold side of the rotor when it passes from the gas compartment to the air one, and an additional sealing plate is installed on the side of the pressure pipe. The drawing shows the development of the lateral surface of the rotor and its direction;

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neither the rotation of the rotor nor the movement of flue gas and air flows.

The regenerative rotating air preheater includes a housing 1 in which a rotor 2 and end sealing plates 3 are installed, and arranged in pairs against each other on opposite sides of the rotor 2, mounted on radial bridges 5 and 6 of housing 1 and separating the housing

I gas 7 and air 8 compartments. At the entrance to the gas compartment 7 of the housing 1 (a house with a sealing plate, an additional seal is installed, on the plate 9 so that the gap between these plates forms the sector slit 10) 11 recycle pipe 12. nozzle

II is made in the form of an adapter, which has been ejected through the radial jumper 6 and the housing 1 beyond the limits of the latter.

On the recirculation duct 12, a fan 13 of overflow air is installed. To limit the flow of flue gases into the air compartment 8, the outlet seal 1 of the recirculation pipe 12 adjoins the gas compartment 7 at the exit of the gas compartment 7. To limit the exhaust gas supplied by the fan 13 of the overflow air adjacent to the end sealing plate at the exit from the gas compartment 7, an additional sealing plate 15 is installed so that the gap between these plates forms a sector gap 16. The Il pipe fittings adjoins the sealing plates and 15 along the perimeter sector th gap 16. It is also made in the form of an adapter and through the radial jumper 6 and the housing 1 is brought out of the latter. The rotor 2 is divided by radial partitions 17 into sector chambers 18 for placing its gaskets. To reduce the flow of air into the gas compartment 7 of the end sealing plate 3, when passing from the air compartment 8 to the gas compartment 7, it can be made wider than the opposite plate, at least to the width of the sector gap 10 and. must cover this gap | this option is not shown).

The air heater is barely blowing.

As the rotor 2 rotates, its chambers 18 move out of the air compartment.

8 into the dead zone between the sealing plates 3 and when moving to the gas compartment 7. In this position, in the chambers 18 of the rotor 2, the air is still under some excessive pressure. Upon further movement of the chambers 18 of the rotor 2, each of them simultaneously opens on the cold side of the rotor 2 through the sector slit 10 to the suction nozzle 11, and on the hot side of the rotor 2 to the gas compartment 7. Under the action of the vacuum generated by the fan 13 chambers 18 enter recirculation duct 12, and flue gases from gas compartment 7 enter chambers 18. At the same time rotor chambers 18 coming out of gas compartment 7 turn off on the cold side of rotor 2 with additional sealing plate 15 | and the movement of flue gases through them is practically stopped. Then the chambers 18 begin to open on the cold side of the rotor 2 through the sector slit 16 into the discharge nozzle T, leaving open on the hot side into the gas compartment 7. At the same time, the overflow air supplied by the fan 13 through the recirculation duct 12 and the discharge nozzle 1 starts enter into chambers 18 rotrar 2 displaced the flue gases containing ash and dust particles into the gas compartment 7-. By the time the rotor chambers 18 come out of the sector slot 10 zone, chambers 18 should be filled with flue gases, and pumped out by fan 13. The flue gases enter the recirculation pipe 12 and are prevented by adjusting the operating mode of the fan 13 and the controlled dampers on the recirculation pipe 12. By the time the rotor 2 chambers 18 exit the sector gap 16, the flue gases from chambers 18 are completely expelled The gas compartment 7, and the chambers themselves, are filled with restraining air supplied by the fan 13. With further rotation of the pofopa 2, its chambers 18, leaving the gas compartment 7, fall into the dead zone between the sealing plates 3 U on this site, and air movement in them is practically no. There is no leakage of air from them into the gas compartment 7, since at this time pressure is generated in the previous chamber by supplying the air 13 by the fan 13

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The chambers 18 of the rotor 2 entering the gas compartment after leaving the zone of the sector gap 10 on the cold side of the rotor 2 are blocked by an additional sealing plate 9. In this position, there is practically no movement of flue gases through the chambers 18 of the rotor 2. Upon further rotation of the rotor 2, the chambers 18 entering the gas compartment 7 and the chambers 18 entering the air compartment 8 open on both sides, and the respective heat transfer fluids are pumped through them.

The implementation of the discharge pipe of the recirculation pipe adjacent to the sealing plate located on the cold side of the rotor when moving from the gas compartment to the air, and the installation of an additional sealing plate on the side of the discharge pipe provide a significant reduction in the flow of both heat exchangers

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environments and increased efficiency of your air heater.

Claims (1)

Invention Formula Regenerative rotary air preheater St. W 879158, characterized in that, in order to reduce the flow of heat exchanging media, the discharge pipe of the recirculation pipe is adjacent to the sealing plate located on the cold side of the rotor when passing from the gas compartment to the air, and an additional sealing plate is installed on the side of the discharge pipe. Sources of information taken into account in the examination I. USSR Copyright Certificate IP 879158, cl. F 23 L 15/02, 197.6.