RU1806323C - Air heater - Google Patents

Abstract

Use: in heating systems. The inventive condensing and evaporative collectors 1 and 7 are connected by means of condensers 6. Their upper ends are located above the level of the coolant in the collector 7, and the lower ends are at the level of the upper wall of the collector 2. Additionally, the collectors 7 and 1 are interconnected by a lowering tube 8 The upper end it is located at the level of the bottom of the collector 7, and the lower one is below the level of the coolant in; collector 2.1. In it, channel 5 of a hot coolant in the form of a bundle of pipes is installed. Capacitors 6 are located in the duct. 1 ill. 7 /

Description

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The invention relates to power equipment of industrial power engineering and can be used in heating systems.

The purpose of the invention is to increase the efficiency and reliability of the air heater ..

The drawing shows a General view of the air heater.

The air heater comprises a horizontal evaporation collector 1, covered with an insulation layer 2, into which a tube bundle 3 is installed with nozzles for supplying 4 and removing hot heat carrier 5. In the horizontal evaporative collector 1, finned condensers 6 are inserted at the top, the upper ends of which are connected by a condensation collector 7 and installed therein above the level of the intermediate heat-transfer condenser, with the exception of at least one condenser - a downcomer pipe 8, the upper end of which is flush mounted - .tso with the inner shell of the condensation collector 7. The lower ends of the condensers B included in the horizontal evaporator collector 1 are installed flush with its inner shell, except the bottom of the condenser — a downcomer 8, the lower end of which is buried in the intermediate coolant layer and a cup 9 is installed with a gap. A filler pipe 10 with a valve 11 is installed on top of the condensation manifold 7.

The air heater operates as follows. The air heater is evacuated and then charged with an intermediate coolant (water, alcohol, freons, antifreezes, etc.) through the filling pipe 10 and valve 11. Which is then closed. The intermediate coolant is partially. It fills internally; horizontal volume of the evaporative collector 1 ...

Hot coolant (water, steam from the boiler room, thermal power station, etc.) is fed into the tube bundle 3 through the inlet pipe A and removed through the outlet pipe 5 ..

An intermediate coolant having a boiling point at a predetermined pressure below the outlet temperature of the hot coolant begins to boil around the tube bundle 3. The resulting intermediate coolant vapor moves upward and enters the condensers 6, which are washed with cold air from the outside. Steam, condensing inside the capacitors 6, gives off the heat of the phase transition through

their walls and fins in cold air. At a low vapor velocity at the initial time in the capacitors 6 there will be a countercurrent flow of steam and

capacitor. However, with increasing speed

the steam will come the moment when the steam stops

. condensate and then it will blow it

up, bare surface condensation and

thereby reducing the thermal resistance of the phase transition.

The condensate moves upward. It enters the condensation manifold 7 and flows down the recessed condenser - the downcomer 8 into the evaporator manifold. 1. WITH

5 to prevent steam from entering; it is inserted into the pipe 8 with a gap in the glass 9. As an intermediate coolant, low-freezing liquids - alcohols, - freons,

0 antifreeze. B. use, water c. As an intermediate coolant to prevent overcooling, the condensation collector 7 and the downcomer 8 can be insulated. During freezing of water (intermediate), the coolant in the evaporation collector 1 as a result of a long interruption. During operation in winter, its cavity will not rupture, since in the collector 1 in its upper part there is still a volume free of liquid.

Thus, the proposed air heater is a highly efficient and reliable device.

5 SUMMARY OF THE INVENTION

An air heater containing an air duct and a channel for hot heat carrier communicating with each other by means of heat pipes having evaporators

0 and condensers, the last of which are installed in the air duct, characterized in that, in order to increase efficiency and reliability, the upper and lower ends of the condensers are combined by condensation and evaporative collectors, respectively, interconnected additionally by means of a fall pipe, the upper end which is located at the level of the bottom of the condensation collector, and the bottom is installed with a gap in the glass and p-positioned below the level of the coolant in the evaporative collector, which is also located to anal hot of coolant with supply pipes and

5 branch, made in the form of a bundle of pipes, with

 the upper ends of the capacitors are located in the condensation collector above

level of the heat carrier, and the lower ends at the level of the upper wall of the evaporative

collector.