SU1573307A1 - Regenerative heat-exchanger - Google Patents

Abstract

The invention relates to heat exchange technology and can be used in fuel combustion plants. The purpose of the invention is to reduce the flow of heat exchanging media. Flue gases (H) and outside air (B) are fed to compartments 4 and 5 from bottom to top under overpressure. Above the grid 2, the intermediate coolant (T) comes to a state of fluidization. In compartment 4, it is heated, captured by comb 10, and moved towards compartment 5. Passing overflow chamber 9, T is blown into B coming from compartment 5. At the same time, dust is blown out of layer 3 and cleaned T is fed to stack 5 heats up due to the heat accumulated by T. By adjusting the position of chamber 9, complete elimination of the flow G into compartment 5 is achieved. 1 sludge.

Description

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(21) 4380473 / 24-06

(22) 04.01.88

(46) 06.23.90. Bup. 23

(71) Minsk Scientific Research Institute of Building Materials

(72) D.Ya.Vainshtein, A.4.A. Zherko, V.M. Yukhovich, L.N. Khurovsky, D.T. Yakimovich, N.S.Nesdorovy, .A.I.Lyubarsky, M. Sh. Derechinsky and N.N. Vlasov

(53) 662.99 (088.8)

(56) USSR Author's Certificate No. 1015234, cl. F 28 C 3/12, 1981.

USSR Author's Certificate No. 118504J, class F 23 L 15/02, 1983.

(54) REGENERATIVE HEAT EXCHANGER

(57) The invention relates to a heat exchange technique and may be used in fuel combustion installations.

The purpose of the invention is to reduce the flow of heat exchanging media. Flue gases (H) and outside air (B) are fed to compartments 4 and 5 from bottom to top under overpressure. Above the grid 2, the intermediate coolant (T) comes to a state of fluidization. In compartment 4, it is heated, captured by comb 10, and moved toward compartment 5. Passage overflow chamber 9, T is blown into B coming from compartment 5. At the same time, dust is blown out of layer 3, and cleaned T is fed into compartment 5 heats up due to the heat accumulated by T. By adjusting the position of chamber 9, complete elimination of the flow G into compartment 5 is achieved. 1 sludge.

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The invention relates to a heat exchange technique and can be used in fuel combustion installations.

The purpose of the invention is to reduce the flow of heat exchanging media.

The drawing shows schematically a heat exchanger.

The regenerative heat exchanger comprises a housing 1 with a transverse perforated gas distribution grid 2, on which a layer 3 of a fluidized dispersed intermediate heat carrier is placed. The housing 1 is divided into compartments 4 and 5 of the heating and heated heat-exchanging media (flue gases and air, respectively) by longitudinal partitions 6-8. The partitions 7 and 8, installed in the zone above the grille 2, form an overflow box-shaped chamber 9 arranged for vertical movement, and its cross-sectional area is from 1/15 to 1/10 of the cross-sectional area of the housing 1.

A device is installed between the grid 2 and the chamber 9, for example, a plate-shaped sector comb 10, which provides for the movement of the intermediate coolant. The movement of the comb 10 is produced from the drive shaft 1

Regenerative heat exchanger works as follows.

Hot flue gases and outside air are supplied to compartments 4 and 5 from bottom to top under overpressure. Above the grill 2, an intermediate coolant, for example quartz sand, comes to a state of fluidization. In compartment 4, it is heated by flue gases, captured by the plates of the comb 10 and moves in the direction of the cooling compartment 5. The passage of the overflow chamber 9, the intermediate fluidized coolant is blown with clean air coming from the compartment 5. At the same time, the dust with corrosive impurities is blown out of the layer 3 with air and is removed from the chamber 9. Thus, the intermediate heat transfer fluid enters the cooling compartment 5 with purified from harmful impurities. In compartment 5, the outside air is heated by the heat accumulated by the moving intermediate heat carrier and directed to the consumer. In the following interval

the exact coolant is returned to the heating compartment 4. Then the cycle is repeated.

. It was established experimentally that when the cross-sectional area of chamber 3 is less than 1/15 of the cross-sectional area of the housing 1, the intermediate heat carrier is flushed

Q with clean air does not have a significant effect on the elimination of contamination leakage into the heated air. In the range of the cross-sectional area of the chamber 9 1/15 - 1/10

5 ° t of the cross-sectional area of the housing 1 ensures the elimination of flue gas leakage from the heating compartment 4 to the cooling compartment 5 with minimal loss of heat loss efficiency.

An increase in this area of more than 1/10 does not affect the degree of contamination of the heated air by flue gases, but leads only to a decrease in the working volume of the heat exchanger.

Thus, the presence of a purge chamber 9 with a cross-sectional area equal to 1 / 10-1 / 15 cross-sectional area of heat exchanger body 1 and making chamber 9 movable along the vertical axis of body 1 to ensure immersion in the intermediate fluidized coolant form a stable an adjustable aerodynamic shutter, which allows to eliminate flue gas leakage and loss of heated air.

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Claims (1)

Invention Formula Regenerative heat exchanger comprising a vertical housing with a transverse perforated gazoraspredeg-inflammatory grating on which is placed a layer of fluidized particulate intermediate heat medium, divided into compartments teploobmenivayuschihs environments longitudinal partitions mounted to form in the zone above the grid overflow box-like chamber, characterized in that, in order to reduce overflows heat exchanging media, said bypass chamber is vertically displaceable, and the area strand of its cross-section is from 1/15 to 1/10 of the cross sectional area of the housing.