RU2270404C1 - Hot-water boiler - Google Patents

Abstract

FIELD: heating of water, applicable in heat supply systems.

SUBSTANCE: the hot-water boiler has a base, furnace with a gas burner, radiation and convectional heating surfaces, gas conduit with a gas-exhaust branch, in which a draught control damper is installed. The damper is made in the form of a heated section having a body with a rotary tubular frame installed in it, the frame consists of vertical and horizontal tubes, pipe connection for delivery of heated circulating water and a pipe connection for discharge of heated circulating water to the boiler tubular system, installed at the frame inlet and outlet respectively, coupled to the body for turning in the bearing assemblies and provided with sealing components. The total area of the slots between the frame tubes and the body corresponds to the minimum flow section of the closed damper.

EFFECT: enhanced efficiency, durability, reliability, and simplified servicing of the boiler.

3 cl, 3 dwg

Description

The invention relates to a power system and can be used, for example, in heat supply systems of individual residential buildings, cottages, small industrial and residential buildings.

Known hot water boiler containing a frame mounted on it a hard wired unit, including a furnace with a loading door, a convective part, a grate, a flue with a gas outlet equipped with a gate. Part of the front surface of the furnace is partially shielded by pipes connected with the convective part of the boiler, which is installed on a previously prepared base before operation [1].

The boiler is reliable in operation, it is quite simple in technical and preventive maintenance, however, the capital costs of constructing a concrete base increase the cost of the boiler as a whole, in addition, the flue gases at the gate have a rather high (about 200 ° C) temperature and are not used for increase boiler efficiency.

A sectional hot water boiler is known, each section of which includes the main elements of the boiler: base, combustion chamber with a gas burner, radiation and convection heating surfaces, flues with a gas outlet, in which a gate is installed to regulate traction during operation of the boiler [2].

The main disadvantage of the boiler is the high aerodynamic resistance of its gas paths, which requires the mandatory installation of a smoke exhaust, at the entrance to which the temperature of the exhaust gases should not exceed 250 ° C, and the bearing units of the latter are equipped with forced cooling [3]. This complicates the design of the boiler as a whole, and in addition, as in the boiler according to [1], high-temperature flue gases are not used to increase the efficiency of the boiler.

Known hot water boiler containing a base, a combustion chamber with a gas burner, radiation and convective heating surfaces, a flue with a gate for regulating traction during operation of the boiler [4]. The boiler on the set of essential features is closest to the claimed invention and adopted as a prototype.

In the boiler, the CO ₂ content is reduced at least three times lower than normal, however, the complexity of the boiler design determines the high complexity of preventive and repair work, and in addition, as in boilers according to [1] and [2], high temperature flue gases leaving the boiler are not used to increase the boiler efficiency.

The objective of the invention is to create a hot water boiler that runs primarily on natural gas, high efficiency, durability and reliability of which would be combined with the simplification of its operational and preventive maintenance and repair work.

The problem is solved in that in a water boiler containing a base, a combustion chamber with a gas burner, a radiation and convection heating surface, a gas duct with a gas outlet in which a gate is installed to regulate the draft, according to the invention, the gate is made in the form of a heated section including a housing with an installed in it a rotary tubular frame consisting of vertical and horizontal pipes, a pipe for supplying heated return water and a pipe for removing heated return water to the boiler pipe system is installed s, respectively, the inlet and outlet box, connected to the housing rotatably in bearing units and provided with sealing elements, the total area of the gaps between the tubes and the housing frame is formed corresponding to the minimum flow cross section of the closed gate.

It is advisable to connect the horizontal tubes of the frame to its vertical tubes in a checkerboard pattern.

It is advisable to make a frame in the form of a coil with a sequential movement of the coolant between the nozzles.

When using the invention, a technical result can be obtained, expressed in:

- increasing the boiler efficiency by 1.0-1.5%, which is due to the installation of a virtually additional convective section in the exhaust pipe, which serves simultaneously as a rotary gate and is connected by an output to the boiler pipe system and an input to the return water of the heating system;

- increasing the durability of the boiler, which is due to reliable prevention of corrosion of its pipe system due to the constant heating of the return water in the tubular frame above the dew point and the subsequent flow of this water into the pipe system (radiation and convection parts) of the boiler;

- facilitating the controllability of the gate when regulating traction, which is due to the flushing of the gas flow of each of the tubes of the frame while passing through the flow through its body.

Other advantages of the claimed invention will be visible from the description and drawings, in which Fig. 1 shows a general view of the boiler, Fig. 2 shows a design of a gate installed in a gas outlet pipe of a boiler duct, and Fig. 3 shows an arrangement of horizontal pipes in a frame.

The hot water boiler is made in the form of a block, on the basis of 1 of which a combustion chamber 2 with a gas burner 3, a radiation chamber 4 and a convective 5 heating surfaces, a gas duct 6 with a gas outlet pipe 7, in which a gate 8 for regulating traction is mounted, is made in the form of a housing 9 ( figure 2) with a rotatable tubular frame installed in it, including horizontal pipes 10 and vertical pipes 11, a pipe 12 for supplying a heated coolant - return water of the heating system and a pipe 13 for removing heated return water to the pipe system boilers connected to the housing 9 with the possibility of rotation in the bearing assemblies 14 and provided with sealing elements 15. Thus, the nozzles serve simultaneously as trunnions of the frame, the pipes 10 in which can be located either in a row or in a checkerboard pattern, as shown in FIG. .3. In a simplified version, the frame can be made in the form of a coil with a sequential movement of the coolant between the pipes, and through pipes 10 it can be arranged either in parallel flows in figure 2, or as in a coil (not shown).

This design of the gate 8 forms an additional heated section of the heat carrier in the boiler, installed in the gas outlet pipe at the outlet of the gas duct, connected inlet with the heating system and providing a guaranteed supply of the return water heated above the dew point to the boiler pipe system due to the exhaust gases passing through the slots of the frame, they are inhibited, as a result of which their thermal energy is efficiently removed, and then the cooled ones will enter the chimney. The control of the frame during operation of the boiler can be carried out manually by the handle 16 (Fig. 1), or in automatic mode when the boiler is equipped with the corresponding automation elements, while regardless of the control method, the force required to rotate the frame is reduced, which is confirmed by the tests of the boiler.

The boiler with the gate of the claimed design can operate both on liquid and solid fuel, for which the combustion chamber 2 is supplied with parts corresponding to the type of fuel (nozzle, grate).

Information sources

1. Hot water boiler KV-R. Manual. KV-R.00.00.ORE.

2. D.Ya. Borshchov. The device and operation of heating boilers of low power. M .: Stroyizdat, 1989, p. 72-74, GAZ-900 boiler.

3. The same, p. 95. Smoke exhausters.

4. Boiler 2k-VK. Prospect CJSC NEST, Udmurt Republic, Izhevsk, tel / fax. (3412) 203-996 - prototype.

Claims (3)

1. A water boiler containing a base, a combustion chamber with a gas burner, radiation and convective heating surfaces, a gas duct with a gas outlet pipe, in which a slide for regulating the draft is installed, characterized in that the slide is made in the form of a heated section, including a housing with an installed a rotatable tubular frame consisting of vertical and horizontal pipes, a pipe for supplying heated return water and a pipe for removing heated return water into the pipe system of the boiler, respectively installed on the input de and output frame connected to the housing rotatably in bearing units and provided with sealing elements, the total area of the gaps between the tubes and the housing frame is formed corresponding to the minimum flow cross section of the closed gate. 2. The boiler according to claim 1, characterized in that the horizontal pipes of the frame are connected to its vertical pipes in a checkerboard pattern. 3. The boiler according to claim 1, characterized in that the frame is made in the form of a coil with a sequential movement of the coolant between the nozzles.

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