SU10591A1 - Steam overheating method - Google Patents

Description

The previously proposed overheating of the working steam of boiler plants or an intermediate steam of multistage steam engines, by means of the heat-carrying vaporous medium, has not been put into practice, owing to the too low efficiency factor of the steam generator especially heated for the production of this intermediate medium. In the present invention, the steam generator for the intermediate medium is placed in the furnace and chimneys of the boiler intended for the production of working steam, thereby eliminating the aforementioned decrease in the efficiency of the installation.

The drawing shows: a) FIG. The implementation of the proposed method of overheating in a ship boiler with three flame tubes, wherein in FIG. Figure 1 shows an external view of the device (the left side of the figure) and a cross-section through the fire box along the line ab (Fig. 2); in fig. 2 is a longitudinal section of the device along the line cd (FIG. 1); in fig. 3-cross-section of the steam generator water reservoirs for the intermediate medium.

and in FIG. 4 is a longitudinal section of the same tanks; b) FIG. 5-7 is the method proposed by the invention in water tube boilers, with FIG. Figure 5 shows a cross-section of the boiler and steam generator for the intermediate medium; in fig. 6 is a front view of the upper drums of the boiler with a schematic depiction of pipelines and valves; and FIG. 7 is a longitudinal section of FIG. 6 along the line cd; c) FIG. 8-10-spring gate valve, and FIG. 8 and 9 show vertical sections of the valve, and FIG. 10-cross-section of the cylindrical spool overflow body placed in the bush.

The proposed method is carried out in the following form: a) applied to the ship-borne fire-tube boiler (Fig. 1-4) - the steam generator for the intermediate medium (Fig. 3 and 4) is attached to the back side of the boiler and, thus, is a back wall flue gas return chamber; it consists of two water tanks 1 and 2 and the heating tubes 3 connecting these tanks, bent in such a way that they

they form a solid wall, perceiving part of the radiant heat of the furnace, and the heating surface of the steam generator, if necessary, can be increased by holding a larger number of heating tubes between the two tanks 1 and 2. Combustible gases from the flame tubes 6 flow into the three divisions 9 of the return chamber of combustible gases and from here through the fire tubes 11 into the smoke chamber 12, giving up part of their heat formed from the tubes 3 to the wall of the steam generator and through it in addition, a portion of the radiant heat of the furnace is transmitted in the same way. As a consequence, the pressure in the intermediate medium booster rapidly rises and when it reaches the permissible limit, the fireman by means of the handwheel 13, screw 14 and transfer of the conical wheels 15 and 16 opens the control valve 18 located in the pipe 17 (valve 19 is constantly open and serves only for the shutter pipeline 17 in the event of malfunction). When the boiler is flooded, the valve 20 remains closed, as a result of which the steam enters the serpentine tubes 21 located in the boiler water and gives up its heat to the boiler water; the resulting co-condensation of the pipes 21 through the pipeline 22 flows back into the lower water tank 2, due to the fact that the lowest places of the serpentine tubes lie above the water level in the intermediate agent steam generator.

Under the normal operation of the boiler, the adjusting valve 18 is closed and the steam generator through the open valve 20 and the pipe 23 passes into the superheater installed at the machine, where it gives its heat to the overheated working steam and returns back to the condensate through the pipes 24 and 22 the lower reservoir by gravity, for which the superheater when the machine is installed at such a height that the condensate formed in it will flow back into the α-generator (which, of course, is not necessary: the superheater during the can be installed below and condensate from it can be transferred back to the steam generator by means of a pump). To eliminate the risk of explosion, the steam generator is equipped with a double safety valve 25, which, when the pressure rises above the low limit, blows through the pipe 26 to the working boiler. The addition of liquid to the steam generator, which is necessary when, due to inattention of the stoker, the safety valves are purged, produced by means of a feed pump or some other feeding device.

b) As applied to water tube cats (Figs. 5--7), the intermediate medium generator described above is placed in the combustion space in such a way that the latter is divided in half and formed from Tpjr6oK 3 boiling wall. parties, acts quite strongly. The action of the entire device is generally the same as in the first example. When the boiler is flooded, valve 20 is closed. The valve 19 in this case serves only to switch off the heating surfaces 21, therefore, it is closed only in the event of a malfunction. When the vapor pressure increases above the permissible limit, the self-acting adjustment device, which in this case consists of the closure member 18, opens and drains the steam into serpentine tubes 21 lying in the water of the upper drums, where the steam will give its heat to the boiler water and the condensate that forms through the tube 22 flows back into the upper water tank 1, the water level in which lies below the serpentine tubes 21. During operation, the valve 20 is open and the superheating steam produced in the steam generator through the pipe 23 is reheated Placed at the car, it will give up its heat and in the form of condensate through pipelines 24 and 22 will flow back to the steam generator. In order to ensure complete safety and reliability, a double safety valve 25 is provided in this case, which, if the spring bypass valve 18 for any reason fails to work, opens and the pipe 26 removes steam from the steam generator to the upper drum of the working boiler.

The above spring overflow valve 18 in FIG. 8, 9 n 10

shown on a larger scale is as follows: the box 27 is divided into two compartments by means of the wall 28 and the insertable axle box 29, in which the cylindrical piston slide 30 moves, and the axle box itself is provided with two rows of slots 31, which in the position shown in the drawing are blocked by a spool 30 placed on the spindle 32, which is impermeable to the cusp 33, and on its upper end rests the spring plate 34, which is under the action of the spring 35, which balances the vapor pressure acting on the spindle. As the vapor pressure increases above the limit valve 30 opens the slots 31 and the excess steam through the left nozzle passes from the steam generator to the pipes 21, where it condenses and transfers its heat to the boiler water.

The subject of the patent.

1. The method of steam overheating in boiler plants and steam-intermediate

pressure in steam power plants using an intermediate medium that evaporates the environment, characterized by the fact that excess vapors of the intermediate medium consumed by the superheat are directed to use their heat, into heating elements located inside the boiler, in the furnace and chimneys of which is a steam generator for intermediate medium.

2. A device for carrying out the steam generator 1, 2, 3 located on the branch line of the steam line for intermediate medium (Fig. 1-4 or 5-7) connecting the steam generator with elements 21 inside the spring-loading boiler (Fig. 8-10), provided with a cylindrical spool overflow body 30, which valve is intended for bypassing the intermediate medium steam into the heating elements with increasing pressure in the steam generator 1.

M, Sh. E

Fig1

{f

FIGE I .4 patent of the company “Society of superheated steam Schmidt e ogre. rep. M 10591 to

F and D.6

Fig.7, the lateate of the company "Society neperpeioPf pair Schmidt with ogre. rep. P 10591 E

F and g 8 F and g. 10 F and g. 9 to the patent of the company of the company of the superheated steam Schmidt with ogre. rep. No. 10591