RU2480679C1 - Condensation hot-water boiler for external arrangement - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: boiler includes a hydrothermoinsulated housing with a stack base, two heat exchangers, which are parallel connected as per a straight-flow downward scheme and made from various materials. External heat exchanger is made for example from carbon steel, and internal heat exchanger is made from noncorroding materials.

EFFECT: cheaper heat and higher condensation use effect both at natural, and forced circulation of heat carrier with preservation of the boiler operability at blackout.

2 cl, 1 dwg

Description

The invention relates to the production of hot water boilers, in particular to condensation boilers for outdoor and indoor use, using the latent heat of vaporization of water vapor in flue gases with an increase in efficiency, due to the additional capture of thermal energy during condensation of water vapor.

State of the art

A boiler plant is known, comprising a boiler equipped with a contact air heater and an economizer, connected in parallel to the supply and exhaust lines to the heating paths of the heat network and the surface heat exchanger, the heating path of which is connected to the contact air heater and equipped with a flow regulator, and the economizer is in communication with the boiler supply line, the installation also contains air temperature sensor (see AC SU 1666855, class F22D 1/36).

The disadvantage of this boiler installation is the high cost of heat.

A well-known outdoor boiler containing a gas burner, a boiler heat exchanger, a three-way valve with direct and reverse lines, a chimney, while at the base of the chimney there is a hatch for cleaning soot and a condensate pipe, and the building heating system contains a vertical riser connected to a straight a boiler line, a deaeration expansion tank, distributing risers with heating devices, a return line to the heating system, a circulation pump, a mud filter (see Condensing boiler l, RGU-M1 operating instructions for Ca 2.574.023. RE of Starorusspribor Plant OJSC, 175200, Staraya Russa, Novgorod Region, Mineralnaya St. 24).

The disadvantage of this boiler is its high cost and the cost of heat production, low efficiency.

The closest in technical essence and the achieved positive effect and accepted by the authors for the prototype is an outdoor condensation boiler containing a gas burner device, a boiler heat exchanger, a three-way valve with direct and reverse lines, a chimney, while a hatch for cleaning soot is installed at the base of the chimney condensate drain pipe, and a straight line is connected to the vertical riser of the building heating system, which contains distributing risers with heating devices, the return line of the system from a boiler and a circulation pump, wherein the boiler in the lower inner part of the chimney is equipped with a heat exchanger of the condensate part, and a fairing is installed inside the heat exchanger of the condensate part, made to evenly distribute the flue gas flow, while the upper part of the heat exchanger of the condensate part is connected to the return line of the heating system, containing a deaeration-expansion tank and a mud filter, and the lower part of the heat exchanger is connected to the return line of the boiler (see US Pat. RU No. 2395042, class F24H 1/00).

The disadvantage of this boiler is its large dimensions, as well as its complete dependence on electric energy, since in the absence of electric energy the circulation pump stops, the heating system turns off.

Disclosure of invention

The objective of the invention is the development of a condensation hot-water boiler for outdoor use, having a cheaper heat, an increase in the effect of using condensation in both natural and forced circulation of the coolant, while maintaining the boiler’s efficiency when the power is turned off.

The technical result that can be obtained using the present invention is to reduce the cost of heat and increase the effect of using condensation in both natural and forced circulation of the coolant while maintaining the boiler’s efficiency when the power is turned off.

The technical result is achieved by using a condensation boiler for outdoor use, containing a thermally insulated body with a chimney base containing a carbon black and a device to prevent blowing out of the flame of the gas burner, direct and return pipes, an air intake grille, while the condensing boiler is installed inside the thermally insulated housing and consists of at least two heat exchangers connected in parallel through a straight-through circuit from the bottom up, In this case, the external and internal heat exchangers are made of dissimilar materials.

In an outdoor condensing boiler, the external heat exchanger is made of carbon steel, for example, and the internal heat exchanger is made of non-corrosive materials.

Thus, the technical result is achieved due to the fact that the boiler heat exchanger is made in the form of parts — heat exchangers from non-corrosive materials with a condensate collection and removal device and a heat exchanger from ordinary materials containing a furnace with a gas burner device, direct and return pipes, while all heat exchangers are connected according to a parallel straight-through flow diagram of the coolant from bottom to top, which allows to obtain the condensation effect both during pumping and during natural circulation.

Brief Description of the Drawings

The drawing shows a condensation boiler outdoor installation, General view, section.

The implementation of the invention

The outdoor condensation hot water boiler consists of a thermally insulated housing 1, inside of which there is installed an indoor water tube boiler 2, a chimney base 3 (not shown), while the internal tube water boiler 2 contains a gas burner device 4 and at least two heat exchangers 5, 6, which are connected in parallel according to a straight-through circuit from the bottom up and made of dissimilar materials, while the external heat exchanger 5 is made, for example, of carbon steel, and the internal the heat exchanger 6 is made of non-corrosive materials, the heat exchanger 7 is made of ordinary materials, while the heat exchangers 5, 6, 7 are connected according to a parallel straight-through flow diagram of the heat carrier, and the heat exchanger 7 contains a tray 8 for collecting condensate with a condensate pipe 9, a straight pipe 9 and a return pipe a pipe 11, a carbon black 12, while a fairing 13 is installed along the axis of the heat exchangers 5 and 6, and the base 3 of the chimney contains a hatch 14 for cleaning soot and a device 15 to prevent blowing of the flame of the gas burner device 4 reverse flow, intake grille 16 for air to enter combustion.

The condensation boiler outdoor installation works as follows.

Cold outside air enters through the intake grille 16, washes the carbon black 12 and, when heated, enters the gas burner 4, where it mixes with the gas and burns, while the flue gases wash the cowl 13, heat exchangers 5 and 6 and the upper part of the heat exchanger 7, are collected in the carbon black 12 and through the base 3 of the chimney are discharged into the atmosphere, and with strong gusts of wind and the occurrence of reverse thrust device 15 to prevent blowing of the flame of the gas burner device 4 under the influence of reverse flow and it opens slightly, reducing the likelihood of blowing out the gas burner device 4, the hatch 14 is used for periodic cleaning of soot, while the coolant through the return pipe 11 enters the water pipe boiler 2 for internal placement and rises upward in parallel flows through heat exchangers 7, 6, 5 under the influence of the pump pressure (not shown) or natural circulation, where the flows are combined and through a straight pipe 10 enter the building heating system (not shown), and the coolant entering the heat exchanger 7 is heated by radiation the flame of the gas burner device 4 to a temperature above the “dew point” in its upper part and when washing off this part with flue gases, condensation does not occur on its surface, which allows it to be made from ordinary materials, while the coolant entering the heat exchangers 5 and 6 has a temperature below the "dew point" and active condensate formation occurs on their surfaces, condensate is collected in a drip tray 8 for collecting condensate and is removed from the boiler via a condensate drain pipe 9, thus achieving better the heat production of the outdoor condensing boiler and the condensing mode of the boiler both during pumping and during natural circulation of the coolant, and the pump circulation is carried out by a pump with half the productivity, since the temperature difference between the direct and return pipes 10 and 11 can be 30-40 degrees., Instead of the usual 20 degrees.

The invention in comparison with the prototype and other known technical solutions has the following advantages:

- cheaper heat production;

- increase in boiler efficiency by 10-15% due to the use of latent heat of vaporization of water vapor in flue gases and additional energy capture during condensation of water vapor;

- increasing the effect of the use of condensation in both natural and forced circulation of the coolant while maintaining the efficiency of the boiler when the power is turned off.

Claims (2)

1. A condensation boiler for outdoor use comprising a thermally insulated body with a chimney base containing a carbon black and a device for preventing blowing out of a flame of a gas burner device, direct and return pipes, an air intake grill, characterized in that the condensation boiler is installed inside a thermally insulated housing and consists of at least two heat exchangers connected in parallel through a straight-through circuit from the bottom up, while the external and internal heat oobmenniki made of dissimilar materials. 2. The condensation boiler for outdoor use according to claim 1, characterized in that the external heat exchanger is made of carbon steel, for example, and the internal heat exchanger is made of non-corrosive materials.

Images