RU10839U1 - TUBE BOILER - Google Patents

Abstract

A water tube boiler, including a burner, a radiation chamber with a front panel with openings for burners or loading solid fuel and with a rear panel, convection ducts with heating surfaces made in the form of sections with longitudinally mounted lower and upper collectors, with gas partitions, and fencing surface, characterized in that each section of convective flues has at least two rows of heat transfer pipes, and gas partitions are made of 0.2 - 0.9 length of the boiler and installed gas tightly in the rear part transversely to the plane of the rows of pipes, while spacers are affixed between the pipes on the outer surface of the boiler and in rows of pipes adjacent to the axis of the boiler, with openings between the pipes above the gas partitions of the rear of the boiler.

Description

MKI (6) P22 V21 / 02 F 22 V 21/22 F 22 V 21/34 F 23 S 1/04

TUBE BOILER

The utility model relates to the field of power engineering and can be used in water tube boilers for layer and chamber combustion of fuel.

The well-known water-tube heating boiler HP-18 is designed for layered and chamber combustion of fuel (see Borschev D.Ya., Cast-iron and steel heating boilers. M. Energoizdat, 1992). The boiler contains a firebox with grates or gas-oil burning. Heat exchange surfaces consist of two half sections with distributing and collecting headers. Each half-section consists of separate screen surfaces welded from F76 Straight pipes. Ф89 mm. The radiation chamber of the boiler is formed by the extreme pipes of each screen from the side of the boiler axis and the longitudinal gas partitions installed behind these pipes, the partitions being made of brick and in their lower part being the walls of the furnace. Other tubes of each screen serve as convective surfaces. The ceiling and the enclosing walls installed outside the pipe part are made of brick. The spaces between the longitudinal gas partitions and the longitudinal enclosing walls under the convective parts of the boiler serve as gas ducts for removing cooled gases.

The disadvantages of this design are: low efficiency of the boiler and low reliability of the heat transfer pipes in the dead ends of the water circulation, low manufacturability of the production of heat transfer surfaces, high specific metal consumption, the presence of a significant amount of brickwork and increased cost of the boiler due to the additional volume of construction work.

The closest in technical essence and the solved problem of the proposed facility is the well-known water-tube heating boiler KV-R-1,6100 (KV-TS-1), designed for layered combustion of fuel.

(Nomenclature reference. Dorogobuzhsky boiler plant. 1992)

The boiler contains a furnace with grates for burning solid fuel, a radiation chamber and convective heating surfaces. Heat exchange surfaces consist of separate sections containing lower and upper collectors installed along the longitudinal axis, interconnected by heat exchange pipes. Sections adjacent to the axis of the boiler (internal) form a radiation chamber, and the rest (external) serve as convective heat transfer surfaces. The inner and outer sections are separated by longitudinal gas partitions; made of brick. Enclosing walls and ceiling are installed outside the pipe part of the boiler. The spaces between the longitudinal gas partitions and the longitudinal enclosing walls, under the outer sections, are used to remove cooled gases from the boiler.

The disadvantages of this design are: low specific power of the boiler and high metal consumption, high unit costs during installation.

The technical problem, the solution of which is directed by a utility model: increasing specific heat production, reducing installation costs.

The stated technical problem is achieved by the fact that in the well-known water-tube boiler, including a radiation chamber, with a front panel with openings for burners or loading solid fuel and with a rear panel, gas flues

convection part, with heating surfaces made in the form of sections with longitudinally installed lower and upper collectors, with gas partitions, and enclosing surfaces:

- at least two longitudinal rows of heat exchange tubes are installed in each section;

-gas partitions with a length of 0.2 - 0.9 of the length of the boiler are installed gas tight in the rear of the boiler transverse to the plane of the rows of pipe sections

- spacers are gas tightly attached between the pipes on the outer surface of the boiler and in the rows of pipes adjacent to the axis of the boiler, with the formation of openings between the pipes above the gas partitions of the rear of the boiler.

The reliability of the technical task is ensured by: the movement of flue gases with transverse washing of the pipes of the heating surfaces, using membrane walls as enclosing surfaces, the manufacture of the boiler in aggregated units with a high degree of readiness for installation. Transverse washing of pipes is achieved by installing gas partitions transverse to the plane of the pipes. The minimum length is 0.2 (in fractions of the length of the boiler) and the maximum length of 0.9 of the gas partitions is determined by the optimal gas flow rates for the most efficient heat transfer and the permissible aerodynamic resistance of the smoke path of the boiler. The limit values of the lengths of the gas partitions are determined experimentally. The claimed utility model is illustrated by drawings, where

in FIG. 1 shows a water tube boiler in a front view and a cross section, FIG. 2 shows a water tube boiler in a longitudinal section; FIG. 3 shows a water tube boiler in horizontal section. t The water tube boiler contains a radiation chamber 1, with a front panel 2 with openings 3 for burners or loading solid fuel, with a rear panel 4. Radiation chamber 1 is formed by the front panel 2, rear panel 4, longitudinal rows 5 of heat transfer tubes 6 sections 7 of convective parts 8 adjacent to the axis of the boiler and the hearth 9, based on the supporting beams 10. Convective parts 8 consist of sections 7 containing the lower 11 and upper 12 collectors installed along the longitudinal axis of the boiler. At least two longitudinal rows 5 of heat transfer pipes 6 are connected to the lower 11 and upper 12 collectors. At the rear of the boiler, gas-tight gas partitions are installed between the rows of 5 heat-exchange pipes 6 of each section 7 and between the rows of 5 pipes of 6 adjacent sections 7 across the plane-legs of rows 5 13 0.2 - 0.9 length of the boiler. The partition walls 13 can be installed, for example, by welding to the heat exchange pipes 6. Between the heat exchange pipes 6 gas spacers 14 are fastened on the outer surface of the boiler, including the front 2 and rear panel 4, and in rows 5 of pipes 6 adjacent to the axis of the boiler with the formation of openings 15 between the pipes 6 above the gas partitions 13, the rear of the boiler. At the same time, in the lower part of the gaps between the last pipes 6 of the longitudinal rows 5 of the sections 7 of the spacer 14 are not tired; they are bent with the formation of openings 16 for the exit of gases from the boiler. Supports 17 are attached to the lower manifolds of 11 sections 7, through which the boiler rests on the foundations 18. Under 9, the boiler is made in the form of a surface lined with refractory material 19 or is made in the form of a grate (when burning solid fuel) and rests on supporting beams 10. External vertical and horizontal surfaces of the boiler are covered with heat-insulating 20 and integumentary 21 materials. . "

The boiler operates as follows.

Natural gas and air are fed through the burner or solid fuel is charged through openings of 3 pa under 9 of the boiler (not shown in FIGS. 1-3). In the radiation chamber 1, fuel is burned and heat is partially transferred through the walls of the heat exchange tubes 6 sections 7, the front tubes 2 and the rear panel 4. Partially cooled flue gases pass through the openings 15 of the radiation chamber 1 to the convective parts 8. Moving over the gas partitions 13 to the front flue gases transverse wash the heat transfer pipes of 6 sections 7, rounding the gas partition 13 by 180 at the front of the boiler, move under the gas walls 13 to the rear panel 4, washing the heat transfer pipes of 6 sections 7. Through the openings 16 smoke New gases are removed from the boiler.

Heat is transferred by gases through the walls of the pipes 6 in the radiation chamber 1 and in the convective parts 8 to the heat carrier circulating through the front 2, rear 4 panels and sections 7.

Working documentation has been developed for the proposed utility model. The implementation will be carried out at a number of facilities in the Urals in 1998.

Claims (1)

A water tube boiler, including a burner, a radiation chamber with a front panel with openings for burners or loading solid fuel and with a rear panel, convection ducts with heating surfaces made in the form of sections with longitudinally mounted lower and upper collectors, with gas partitions, and fencing surface, characterized in that each section of convective flues has at least two rows of heat transfer pipes, and the gas partitions are made of 0.2 - 0.9 length of the boiler and installed gas tightly in the rear part transversely to the plane of the rows of pipes, while spacers are affixed between the pipes on the outer surface of the boiler and in rows of pipes adjacent to the axis of the boiler, with openings between the pipes above the gas partitions of the rear of the boiler.