RU2150051C1 - Fire-tube vertical water-heating boiler - Google Patents

Abstract

FIELD: heating and water-supply systems. SUBSTANCE: boiler has furnace with burner device, vertical cluster of fire tubes positioned inside external tube and branch pipes of forward and return water. Upper part of boiler is made as a tank containing overflow tube mounted between external tube of boiler and tank body, and air tube with pressure gauge positioned at the height equal to or larger than relation of increase in hot water volume in heating system to cross-sectional area in upper part of boiler between vertical cluster of fire tubes and external tube. Overflow and air tubes are fitted with shut-off devices, which makes use of electric pumps in heating system unnecessary. EFFECT: simplified construction. 1 dwg

Description

 The invention relates to water heating systems and hot water supply and can be used to heat the internal volumes of buildings.

 A boiler plant is known, comprising a sealed electrode boiler with a steam outlet pipe, equipped with a shut-off valve located at the height of the boiler, connected by a feed pipe to a feed tank installed under the boiler, equipped with a feed water level controller, the installation is further equipped with an expansion tank, a steam pipe in the zone to the shut-off valve is made with a U-shaped section, the upper part of which is located above the level regulator of the feed tank, and the expansion the tank is removable and included in the cut of this pipe (see ed. St. USSR N 1666848, class F 22 B 1/30).

 The disadvantage of this boiler installation is the high cost of its manufacture, cumbersome, low reliability.

 Known combined boiler containing a combustion device and autonomous inlet and outlet pipes, fixed in the tube sheets of the upper and lower drums with the formation of a hot water and steam circuits, the upper drum of the steam circuit is partially filled with water, while it is equipped with a partially filled water tank-battery, placed in the upper drum of the water-heating circuit, and pipelines, each of which is equipped with its own locking element, and the storage tank and the upper drum of the steam circuit are communicated with I’m through the mentioned pipelines, one of which is connected below the water levels in the tank and drum, and the other is above these levels, and the furnace device is made in the form of a rectangular chamber placed above the burners in the area of one of the ends of the lower drum with the formation of side channels for cooling medium, while the boiler is equipped with a grate and a screen made of horizontal pipes and placed behind the combustion device (see RF patent N 2037093, Cl. F 22 B 33/02).

 The disadvantage of this boiler is the design complexity, high costs of heat production, low reliability.

 The closest analogue of the claimed invention is a boiler containing a furnace with a burner, a vertical bundle of flame tubes installed inside the outer pipe, a pipe for direct and return water and an expansion tank in the upper part (patent SU 573, F 22 H 1/22).

 The disadvantage of this boiler is the high cost of heat production, the use of electric pumps serving the boiler and heating system.

 The aim of the invention is to reduce the cost of heat production, simplifying the design, eliminating the use of electric pumps in the heating system.

 This goal is achieved by the fact that in a vertical tube hot water boiler containing a furnace with a burner, a vertical bundle of flame tubes installed inside the outer pipe, a direct and return water pipe, the upper part of the boiler is made in the form of a tank containing an overflow pipe installed between the external boiler pipe and the tank body and the air tube with a pressure gauge installed at a height equal to or greater than the ratio of the increase in the volume of hot water in the heating system to the cross-sectional area in the upper part the boiler between the vertical bundle of flame tubes and the outer pipe, and the overflow and air tube are equipped with locking devices.

 The drawing shows a General view of the vertical tube fire tube, section.

 The vertical tube hot water boiler consists of a furnace 1 with a burner 2, a vertical bundle of flame tubes 3, an external pipe 4, a tank 5, including a supply pipe 6. The tank 5 contains an overflow pipe 7 with a locking device 8 and an air pipe 9 with a locking device 10 and with a manometer 11, the air tube 9 is located at a height H from the insert of the overflow tube 7, while the sealed tank 5 together with the outer pipe 4 and the vertical bundle of flame tubes 3 form a closed volume of air 12, the furnace 1 contains a return pipe 13.

 Fire tube vertical hot water boiler operates as follows. The heating system is filled with cold water to the level of the overflow tube 7, after which the shut-off device 8 is closed, the shut-off device 10 of the air tube 9 is closed, the burner 2 with the furnace 1 is turned on, the water is heated, expands and rises between the bundle of vertical flame tubes 3 and the external pipe 4 in the upper part of which a closed volume of air 12 is formed and at the same time through the supply pipe 6 enters the heating system, water, which, cooling down, returns to the boiler through the return pipe 13. Due to the rise of additional circulating pressure arises up to level H equal to the hydrostatic pressure of a hot water column of height H, which is calculated as the ratio of the increase in the volume of hot water in the heating system to the cross-sectional area in the upper part of the boiler between the vertical bundle of flame tubes 3 and the outer pipe 4, This causes a natural circulating pressure in the heating system increased to 0.1 - 0.3 atm due to the additional potential energy of the column H of hot water above the supply pipe 6, hot water, p sitting down to level H, reduces the closed volume of air 12, there is an increased air pressure in the closed volume of air 12 formed by the sealed tank 5 together with the outer pipe 4 and the vertical bundle of flame tubes 3. The shut-off device 10 sets the operating overpressure in the heating system according to the pressure gauge 11 . Thus, a sealed heating system is formed with increased natural circulation pressure up to 0.1 - 0.3 atm, without the use of electricity and electric pumps.

Claims (1)

 A vertical tube boiler containing a furnace with a burner, a vertical bundle of flame tubes installed inside the outer pipe, a direct and return water pipe, the upper part of the boiler being made in the form of a tank, characterized in that the tank contains an overflow pipe installed between the outer pipe of the boiler and a tank body and an air tube with a manometer installed at a height equal to or greater than the ratio of the increase in the volume of hot water in the heating system to the cross-sectional area in the upper part of the boiler between the vertical a full bundle of flame tubes and an external tube, while the overflow and air tubes are equipped with locking devices.