RU2236648C1 - Hot-water boiler - Google Patents

Abstract

FIELD: heat supply systems.

SUBSTANCE: proposed boiler has gas-tube and water-tube parts installed in one housing. Gas-tube part is provided with furnace in form of fire tube and gas-tube single-pass bank, and water-tube part is provided with convection chamber with heat-exchange heating surface. Boiler has front turnable chamber located on boiler front and it is provided with additional heating surfaces in form of front shield and front ring channel from side of front playing the part of manifolds of front shield and heat insulation of boiler housing. Heat exchange heating surface in convection chamber is made in form of detachable convection unit with flow of gases from top to bottom and consisting of flat sections, being tubular-diaphragm panels connected with rectangular manifolds. Convection chamber is provided with additional heating surface in form of rear ring channel playing simultaneously part of manifolds delivering water into detachable unit and water volume of gas-tube part of boiler and also heat insulation of boiler housing.

EFFECT: provision of reliability, repairability, efficiency and convenience in operation.

4 dwg

Description

The invention relates to the field of heat supply and can be used in steel hot water boilers.

There are known gas-tube water-heating boilers containing a firebox made in the form of a heat pipe or heat space, a one-way gas-tube convective bundle, and also “water-tube” elements (slotted, annular or box-shaped ones are possible) along which water moves with significant speeds significantly exceeding the speeds in the water jacket of the fire tube boilers. Moreover, all these elements are located inside a common cylindrical or box-shaped chamber (see USSR AS No. 779756, IPC F 24 H 1/28, bull. No. 42, 11/15/80, USSR AS No. 1744378, IPC F 24 H 1/38, bull. No. 24 dated 06/30/92; RF patent No. 2160874, IPC F 24 H 1/00 dated 12/20/2000).

The disadvantage of such boiler designs is the difficulty of performing such “water-tube” elements, as well as the fact that a certain element, as a rule, performs one or two of the following functions: water distribution, or increasing the heating surface, or increasing the reliability of operation, or improving the operating conditions of the boiler , or reduction of losses to the environment.

The closest analogue to the proposed technical solution is a hot water boiler containing a gas pipe and water pipe part, the gas pipe part having a fire tube and a one-way gas pipe bundle, and the water pipe part having a convection chamber with a heat exchange heating surface in communication with the convection beam and the furnace installed in one housing (see patent RU No. 2162574, IPC F 24 H 1/32, publ. 01.27.01).

The disadvantages of the prototype boiler are inseparability, poor accessibility to the elements, therefore, low maintainability of the convective heating surface, as well as high aerodynamic drag and the possibility of clogging of the convective heating surface.

The objective of the invention is to develop a simple, reliable, maintainable, efficient and easy to use boiler design.

The problem is solved using the signs specified in the claims common to the prototype, such as a hot water boiler containing a gas pipe and water pipe installed in one housing, the gas pipe having a fire tube and a one-way gas pipe, and the water pipe has a convection chamber with a heat-exchange heating surface in communication with a convective beam and a furnace installed in one housing, and distinctive essential features, such as: the boiler is equipped with a front rotary the first chamber located on the front of the boiler and on the front of the boiler has additional heating surfaces in the form of a front screen and a front annular channel, which simultaneously functions as front screen collectors and thermal insulation of the boiler body, and in the convection chamber the heat exchange heating surface is made in the form of a removable convection unit with the gas flow from top to bottom, consisting of flat sections, which are tubular-membrane panels connected to collectors of a rectangular shape, and in convection implicit chamber, an additional heating surface in the form of adjustable annular channel, while performing the functions of the water-dispensing reservoirs in the removable unit and the water volume of the boiler-tube, as well as thermal insulation of the boiler casing.

In this case, the task is solved using the following distinguishing features:

- the front pivoting chamber located on the front of the boiler is limited by the plane of the furnace output window and parts of the tube plate, the front door of the boiler and the inner ring located above the plane of the furnace output window;

- a one-way water-pipe heat exchange heating surface in a convection chamber with a gas flow from top to bottom is a removable block of flat sections connected by pipe elements;

- the flat section of the removable block is made in the form of tubular-membrane panels connected to collectors of a rectangular shape;

- additional “water-tube” heating surfaces from the front of the boiler, consisting of a front screen and a front annular channel, which at the same time acts as collectors of the front screen and thermal insulation of the boiler body from the hot gases of the furnace and the rotary chamber;

- an additional “water-tube” heating surface in the form of a rear annular channel around the convection chamber, which at the same time acts as collectors for distributing water to the removable unit and to the water volume of the gas pipe part of the boiler, as well as thermal insulation of the boiler body from the hot gases of the convection chamber;

Both annular channels front and rear are separated from the water volume of the gas-tube part of the boiler by the planes of tube sheets.

The above distinguishing features, which include a combination of a front pivoting chamber, a front screen with a front annular channel and a removable convection unit with a rear annular channel, along with features common to the prototype, allow to obtain the following technical result:

- - simplicity of manufacture and compactness of the boiler (the ratio of length to height and width is close to one);

- increase the maintainability of the boiler due to the removability of the convection unit and two-way access to the gas tube bundle for replacing pipes;

- improving the operating conditions of the boiler due to the fact that the annular channels reduce the temperature of the boiler body, the burner device is installed in a cooled front screen, and smoke tubes and sections of the convection unit are available for inspection and cleaning.

With the help of ring channels several functions are carried out at once: increasing the heating surface of the boiler, distributing water, increasing the reliability and service life of the boiler, increasing the efficiency, improving operating conditions.

The above distinguishing features, each individually and all together, are aimed at solving the task - the development of a simple, reliable, maintainable, efficient and easy-to-use boiler design, and are essential. The use of the proposed combination of significant distinguishing features in the prior art is not found, therefore, the proposed technical solution meets the patentability criterion of “novelty”.

A single set of new essential features with common known provides a solution to the problem, is not obvious to specialists in this field of technology and indicates compliance of the claimed technical solution with the patentability criterion of “inventive step”.

The invention is illustrated by the description of a specific, but not limiting example of implementation and the accompanying drawings, where

figure 1 - presents a General view of the boiler, a longitudinal section along aa;

figure 2 is a transverse section along BB of figure 1;

figure 3 is a cross section along bb In figure 1;

figure 4 is a section GG and view along the "D".

The boiler contains a firebox 1 in the form of a flame tube, a rotary gas chamber 2 in the front part of the boiler, a one-way gas tube convective bundle 3, a convective chamber 4, a removable convective block 5 of flat sections 6 containing tubular-membrane panels 7 and rectangular collectors 8, connecting pipes 9 of flat sections, the front annular channel 10 with dividing walls 11, the front screen 12 with the chamber 13 for the burner and water pipe elements 14, the rear annular channel 15 with dividing walls 16, the overflow pipe 17 from the front annular channel 10 to the rear annular channel 15, the bypass piping 27 from the rear annular channel 15 to a removable convective unit 5, the front tube plate 18, the rear tube plate 19 with holes 20 for water to exit from the rear annular chamber into the water volume 26 of the gas pipe part the boiler, the exhaust gas window 21, the rear door of the boiler 22, the front door of the boiler 23, the boiler body 28 itself, the water inlet 24, the water outlet 25.

The convection unit 5 is removed from the convection chamber of the boiler 4 through the rear door 22. The front annular channel 10 is connected to the rear annular channel 15 bypass pipe 17.

The boiler operates as follows: the flue gases generated during the combustion of fuel in the furnace 1 enter the rotary chamber 2 located on the front of the boiler, then, passing inside the tubes of the gas tube convective beam 3, they are sent to the convection chamber 4, pass from top to bottom through convective flat sections 6 removable convection unit 5, rotate 90 ° and leave the boiler through the outlet window 21. Water from the boiler room piping system enters the middle of the front annular channel 10 through the water inlet 24, passage um through the top of the annular channel and on the opposite side enters the pipes 14 of the front screen 12, passes the chamber 13 for the burner, the remaining pipe elements 14 of the front screen 12, and from the bottom of the front ring screen enters the bypass pipe 17.

The circulation in the tube elements of the front screen is organized using dividing walls 11 of the front annular channel 10.

From the bypass pipe 17, water enters the lower part of the rear annular channel 15, rises through it to the convection unit 5, passes through the bypass pipe 27, flat sections 6, their connecting pipes 9 and exits through the pipe 27 to the opposite side of the rear annular channel 15, then through holes 20 in the rear tube plate 19, into the water volume 26 of the gas pipe part of the boiler, rises upward and leaves the boiler body 28 through the outlet pipe 25 to the boiler piping system. The circulation in the rear annular channel 15 is carried out using dividing walls 16.

Claims (1)

A water boiler containing a gas pipe and a water pipe part installed in one housing, the gas pipe part having a fire tube and a one-way gas pipe bundle, and the water pipe part has a convection chamber with a heat exchange heating surface, characterized in that it is equipped with a front rotary chamber, located on the front of the boiler and has, on the front of the boiler, additional heating surfaces in the form of a front screen and a front annular channel, which simultaneously functions as front collectors of the screen and thermal insulation of the boiler body, and in the convection chamber, the heat exchange heating surface is made in the form of a removable convective block with the gas flow from top to bottom, consisting of flat sections, which are tubular-membrane panels connected to collectors of a rectangular shape, and in the convection chamber an additional heating surface in the form of a rear annular channel, simultaneously serving as collectors for distributing water to a removable unit and the water volume of the gas pipe part of the boiler, and ie thermal insulation of the boiler body.

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