SU19208A1 - Low pressure water economizer - Google Patents

Description

In order to use the waste gas heat, at least not to the extent that was possible when installing high pressure economizers, instead of the latter, it is proposed to install low pressure, circulation type economizers in chimneys that can be built and installed by their own means without ordering to the plant.

In the proposed low pressure water economizer, the tank and the heating batteries are divided into separate circulation zones by installing in the tank partitions of different heights that do not reach the bottom of the tank and connecting the heating tubes into separate batteries, thus achieving the counterflow principle and the simplicity of circulation. a network in which water moves along the shortest path. In FIG. 1 shows a low pressure water economizer in a vertical longitudinal section; FIG. 2 - the same in cross section.

The heating elements are ordinary ribbed pipes used in steam heating, connected transversely, with respect to the flue, in rows into individual batteries 1. Such a battery with circulation pipes 2-h3, 4 - 5. connected to water tank 8.

forms a self circulating unit. The water tank 8, equipped with a lid with a tube 16 which communicates with the atmosphere, is respectively divided by partition walls 9–9 that do not reach the bottom into special circulation zones 10, 11 and 12. Starting from the chimney side (the flow of gases is indicated by arrows), the first Conservation zone 10 receives fresh, cold, feedwater, which circulates through the first heating battery from this side.

Heated in zone 10 water circulates in series again in zones 11 and 12 through heating batteries, for which the mouth of the descending pipes 4 and would be elevated higher than the mouth of pipes 2 and 4. Such sequential circulation follows the principle of counterflow and can be repeated repeatedly.

The water level in the tank can be maintained by an ordinary float valve 13 connected to the water mains or in some other way.

Hot water from zone 12 under natural pressure enters feed pump 14, which drives it into the steam boiler.

Used pump steam should be used to preheat the water before it enters the tank using a conventional tubular heater 15. Such heating (approximately 30 °) is highly desirable in order to avoid the tubes of the first battery and the dense soot deposits on the edges,

The tubes can be cleaned using an ordinary 1M 1 method 1i-g manually by disassembling the economizer, manually brushing through the doors in the walls of the economizer, blowing with steam or compressed air through the perforated tubes located between the heating tubes.

Such an economizer can be installed generally to produce hot water heated by the heat of the exhaust gases of steam boilers, metallurgical furnaces, etc.

The subject of the patent.

A low pressure water economizer, characterized by the use of tank 8 (Figs. 1 and 2), located above the economizer itself, communicated with each of the components of the last battery 1 by two circulation pipes 2, 3, 4-5 ... (Fig. 1 ) and divided by partitions 9 that do not reach to the bottom into zones 10, 11, 12 ... according to the battery pack, which partitions 9 and tube ends entering the tank 2, 3, 4, 5 ... are given different heights for partitions .- decreasing e, and for pipes - increasing in the direction of water movement.

Chip.