RU181680U1 - Marine Recycling Steam Boiler - Google Patents

Abstract

The utility model relates to energy, in particular to recycling steam boilers with multiple forced circulation, utilizing the heat of exhaust gases of diesel engines, gas turbines and furnaces for various purposes and incorporating an economizer of circulating water. The objective of the utility model is to reduce the dimensions and weight of the boiler, simplify the manufacturing technology, install and repair the boiler, and exclude external bypass pipelines with fittings from the boiler design. The problem is solved by combining the distributing and collecting manifolds of the bundle of tubes of the economizer and the evaporation part into one collector of large diameter, which has access to the inside of the collector and located in the bosom between the economizer and evaporation bags. 3 ill.

Description

The utility model relates to energy, in particular, to recycling steam boilers with multiple forced circulation, utilizing the heat of exhaust gases of diesel engines, gas turbines and furnaces for various purposes with the supply of feed water directly to the steam separator.

Ship recycling boilers are known in which distributing and collecting collectors of heating surfaces (economizers, evaporative and superheaters) are located directly in the boiler flue. (one).

The collectors are located in the sinuses between the tube bundles. To ensure access to the collectors during manufacture, installation, operation and repair, the sinuses must be of substantial size (up to 70% of the volume and height of the boiler) in order to provide access to human collectors.

The objective of the utility model is to reduce the dimensions and weight of the boiler, simplify the manufacturing technology, install and repair the boiler, and exclude external bypass pipelines with fittings from the boiler design.

The task is achieved by combining distributing and collecting manifolds of packs of pipes of the economizer and the evaporation part into one collector of large diameter, which has access to the inside of the collector and located in the bosom between the economizer and evaporation bags.

This problem was solved by utility model patent No. 151157 “Ship recycling steam boiler” only for recycling boilers with feed water economizer, when feed water from a warm drawer is supplied by the feed pump directly to the recovery boiler economizer (see schemes of recycling boilers (2)).

For recycling boilers having circulating water economizers, when feed water is supplied directly to the steam separator (see the recycling boiler diagram (3)), the circulation pump supplies circulating water directly to the boiler economizer - this scheme is not acceptable.

To ensure the boiler’s operability, it is necessary to change the design and location of removable baffles inside the collector (as compared to patent No. 151157) and the connection diagram of the economizer pipe packages and the evaporator part to the collector.

Application of the proposed boiler design:

- reduce the dimensions and weight of the boiler due to a significant reduction in sinuses between pipe bundles;

- exclude external bypass pipelines with fittings between distributing and collecting manifolds from the boiler design;

- it will simplify the technology for finding and replacing damaged coils during repair, as well as the technology for manufacturing and installing the boiler, since all work will be carried out from inside the collectors.

The design of the shipboard recovery boiler is shown in FIG. 1, FIG. 2 and FIG. 3, where:

- in FIG. 1 - schematically shows a General view of a ship recycling boiler;

- in FIG. 2 is a view along arrow A - A in FIG. one;

- in FIG. 3 - shows a schematic diagram of a recycling plant, and in the boiler, one half is conventionally not shown.

The heating surface of a recycling steam boiler of a water-tube type with multiple forced circulation consists of two symmetric bundles of economizer tubes 1 located last along the gases, two bundles of pipes of the evaporator part 2, and also two bundles of tubes of the superheater 3 located first along the gases.

The breakdown of all pipe bundles into two symmetric sections connected in parallel through the steam-water duct was performed in order to simplify the manufacturing and installation technology of the boiler tubing.

The input and output ends of the tubes of the packages of the evaporator part 2 and the economizer 1 are welded from the inside to the collector 4, inside of which three removable baffles 5 and 6 are made along its entire length. The input ends of the bundles of tubes of the economizer 1 are connected to the insulated chamber formed by the collector 4 and in the chambers formed by the baffles 6, the input ends of the tubes of the packages of the evaporator part are connected and the output ends of the pipes of the packets of the economizer 1. The output ends of the tubes of the packages of the evaporator part 2 are connected to the free cavity of the collector 4, coupled with a steam separator.

Inside the large diameter collector of the superheater 7, a removable partition 8 is made along its entire length, which divides the collector 7 into two insulated chambers, to which the input and output ends of the pipes of the superheater packages 3 are connected.

In collector 4 and 7 there are manholes, not shown in the drawing, to provide access to the inside of the collectors. Removable partitions and partitions 5, 6, 8 are attached to the collectors, for example, using studs welded to the collector. For ease of installation and removal from the collector, these baffles can be made of several parts. All tube packages are enclosed in a common casing 9.

The inlet 4 of the circulating water 10, the outlet pipe of the steam-water mixture 11 are welded to the collector 4, and the saturated steam input pipe 12 and the superheated steam outlet pipe 13 are welded to the collector 7. All pipes are welded in pairs on both sides of the collectors to improve the distribution of the working medium through the pipes. The boiler fittings are conditionally not shown.

The composition of the recycling installation that ensures the operation of the boiler includes: a feed pump 14, a warm box 15, a steam separator 16, a circulation pump 17 and connecting piping with fittings not shown in the drawing.

During operation, the exhaust gases are washed outside the heating surface of the recovery boiler. Feed water from the warm drawer 15 by the feed pump 14 is fed to the steam separator 16. The water leaves the economizer with a slight under-heating to a boil and enters the chambers formed by the baffles 6.

The circulation pump 17, having a productivity several times higher than the steam capacity of the boiler, takes water from the separator 16 and through the nozzles 10 delivers it to the chamber formed by the baffle 5, from which water is distributed through the economizer pipes and then enters the chambers formed by the baffle 6. Next, the water from the economizer enters the inlet ends of the tubes of the evaporative bags 2. In the evaporative part, the hot water partially evaporates; steam-water mixture consisting of steam and water enters the free cavity of the collector 4 and through the nozzles 11 leaves the collector 4 and then enters the steam separator 16.

In the steam separator 16, steam and water are separated; saturated steam through the nozzles 12 enters the upper chamber of the collector of the superheater 7, is distributed through the pipes of the superheater and, after overheating to the required temperature, enters the lower chamber of the collector 7, from which it goes to the consumer through the nozzles 13.

Thus, the proposed design significantly reduces the dimensions and weight of the boiler, eliminates external bypass steam pipelines with fittings between the collectors from the boiler design, simplifies the manufacturing, installation and repair of the boiler and allows its use for recycling boilers with circulating water economizers when feeding feedwater directly to the separator couple.

References

1. Ship boiler installations. IN AND. Yenin, N.I. Denisenko, I.I. Kostylev. Moscow “Transport” 1993, p. 117, Fig. 7.12 (g), p. 119, Fig. 7.13, pp. 115-123.

2. Marine steam boilers. D.Kh. Milton, P.M. Lich Moscow “Transport” 1985, p. 113, Fig. 3.16, Fig. 3.17.

3. Ship boiler installations. IN AND. Yenin, N.I. Denisenko, I.I. Kostylev. Moscow “Transport” 1993, p. 120, Fig. 7.14.

Claims (1)

Ship recycling steam boiler with multiple forced circulation, with the supply of feed water directly to the steam separator, which includes an economizer of circulating water, vaporization and steam overheating packages of pipes made of two symmetric sections connected in parallel to the water supply path and enclosed in a common casing, different the fact that, in order to reduce the dimensions and weight of the boiler, as well as simplify its design, operation, manufacturing and repair technologies, distributing and collecting collectors of tube packages of the evaporator part and economizer are combined into one collector of large diameter, inside of which three removable baffles are made along the entire length, forming insulated chambers, one of which is connected to the input ends of the tube bundle of economizers, and the other two are connected to the output ends of the tube bundle of economizers water and the inlet ends of the pipe bundles of the evaporator part, the outlet ends of the pipe bundles of the evaporator part are connected to the free cavity of the collector, from which the steam-water mixture is supplied Xia in vapor separator.

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