RU2559226C1 - Heat generating unit - Google Patents

Abstract

FIELD: power industry.

SUBSTANCE: heat generating unit containing high and low pressure boilers with steam extraction pipelines, two deaerators with heating medium supply pipelines. Deaerators are connected with the boilers by means of feedwater pipelines with the pumps installed on them, the purge water pipeline of the high pressure boiler is connected to the heating medium supply pipeline of the deaerator of the low pressure boiler, also there are the shock assembly, the pulse supercharger with a diaphragm and two check valves, while the shock assembly is installed in the feedwater pipeline of the high pressure boiler, and the pulse supercharger is installed between series connected check valves installed in the purge water pipeline and the feedwater pipeline of the high pressure boiler.

EFFECT: increase of power efficiency of the unit due to providing of pulse purging of the boiler drum.

1 dwg

Description

The invention relates to a power system, where it can be used in heat supply systems as a heat source of increased energy efficiency.

Known drum-separator of a steam boiler with separation devices, including intra-drum cyclones with pallets, the lower part of the pallets is made in the form of a duct more than 100 mm high, the edge of which is separated from the cyclone by at least 50 mm, while the walls of the duct are made with an inclination to the horizontal axis at an angle of 30-90 °, and in its lower part a purge line was made with the drum going out (RU No. 2151950, IPC F22B 37/26, publ. June 27, 2000).

Among the disadvantages, it should be noted the low efficiency of the steam boiler, working in conjunction with this drum-separator, due to the relatively large component of the loss of heat balance for purging and its irrational use. This entails the loss of heat and condensate, as well as the time of the kindling of the boiler due to the delay in the stabilization time of its mode.

The closest technical solution for the totality of the essential features is a heat-generating installation containing steam boilers with connected pipelines of steam, feed water, purge water, deaerators of feed water with pipelines for supplying a heating medium, the purge pipe of steam boilers of higher working pressure is connected to the supply pipe the heating medium of the deaerators of feedwater of steam boilers of lower working pressure (RU No. 2230254, IPC F22B 33/14, F22B 37/54, publ. 20.01.2004). The named design is selected for the prototype.

Among the disadvantages, it can be noted that the use of purge water from a high-pressure boiler is more appropriate for the heating medium of a deaerator of a low-pressure boiler than for receiving steam from a second boiler, since it has a higher salt content. In ensuring the operability of the above-described scheme, the need arises for continuous purging, which also leads to significant heat losses relative to periodic purging.

An object of the invention is to increase the energy efficiency of a heat generating installation from the implementation of pulsed purge of the drum of a steam boiler and the use of its potential in the generation of steam.

The technical result is achieved due to the fact that the heat generating installation containing steam boilers high and low pressure with pipelines for steam extraction, two deaerators with pipelines for supplying a heating medium, while the deaerators are connected to steam boilers through pipelines of feed water with pumps installed on them, a purge pipe the water of the steam boiler of high pressure is connected to the pipeline for supplying the heating medium of the deaerator of the steam boiler of low pressure, further comprises an impact assembly, and a pulse supercharger with a diaphragm and two non-return valves, the shock assembly being installed in the feed water pipe of the high pressure steam boiler, and the pulse supercharger is connected between the check valves in series installed in the purge water pipeline and the feed water pipe of the high pressure steam boiler.

The proposed version of the heat generating installation is presented in the drawing, where it is indicated: 1 - high pressure steam boiler; 2 - steam boiler low pressure; 3 - pipeline for the selection of high pressure steam; 4 - pipeline selection of low pressure steam; 5 - deaerator steam boiler 1 high pressure; 6 - deaerator steam boiler 2 low pressure; 7 - pipeline supply of heating medium to the deaerator 5 of the steam boiler 1 high pressure; 8 - pipeline supply of heating medium to the deaerator 6 of the steam boiler 2 low pressure; 9 - feedwater pipe of the steam boiler 1 high pressure; 10 - feed water pipe of a low pressure steam boiler 2; 11 - feed pump of the steam boiler 1 high pressure; 12 - feed pump steam boiler 2 low pressure; 13 - purge pipe of a steam boiler 1 high pressure; 14 - shock node; 15 - pulse supercharger; 16 - diaphragm pulse supercharger 15; 17, 18 - check valves.

Heat-generating installation works as follows. Initially, they ensure that the coolant fills the internal spaces of the high pressure steam boiler 1 and low pressure steam boiler 2, as well as the pipelines of the circuit shown in the drawing. Then, the coolant is heated in steam boilers 1 and 2 of high and low pressure with a gradual exit to steam generation by using the heat of the burned fuel, electric heating or other, including non-traditional, methods involved in heat supply. High pressure steam is taken through pipe 3, and low pressure steam is taken through pipe 4. In deaerator 5, the source water (not shown in the drawing is the source water supply pipe) due to the use of heating medium energy supplied through the heating medium supply pipe 7, it is deaerated and a feed pump 11 is transported through a feed water pipe 9 to a high pressure steam boiler 1. In deaerator 6, the source water (the source water supply pipe is not indicated in the drawing) due to the use of the heating medium energy supplied through the heating medium supply pipe 8 is deaerated and transported by the feed pump 12 through the feed water pipe 10 to the low pressure steam boiler 2. The purge water pipe 13 of the high pressure steam boiler 1 is connected to the heating medium supply pipe 8 of the deaerator 6 of the low pressure steam boiler 2. This allows the deaerator 6 of the low pressure steam boiler 2 to be used as a continuous blowdown expander for the high pressure steam boiler 1. In this case, the use of purge water of the high pressure steam boiler 1 as a heating medium of the deaerator 6 of the low pressure steam boiler 2 does not preclude the use of steam for the same purpose, but only reduces its consumption as much as the deaeration process allows.

The shock assembly 14, installed in the feedwater pipe 9 of the high pressure steam boiler 1, generates pulses of the feedwater movement by organizing local water shocks when the section of the feedwater pipe 9 is partially or completely blocked. Impulses of the amount of movement of feed water provide the return movement of the diaphragm 16 of the pulse blower 15 when using the energy of positive and negative waves of local hydraulic shocks, which is converted by check valves 17, 18 into a pulsed pumping (purging) of purge water through the pipe 13 of the high-pressure boiler 1 to the supply pipe 8 heating medium to the deaerator 6 of the steam boiler 2 low pressure.

The process of generating thermal energy will occur until there is a supply of source water to deaerators 5 and 6, as well as the selection of steam through pipelines 3 and 4.

This heat-generating installation, with respect to well-known technical solutions, has increased energy efficiency, which is characterized by the fact that:

- the quality of the generated steam is improved by providing effective removal with a pulsed feed water supply and a pulsed purge of suspended particles from the drum of the steam boiler, which allows you to blow less water, which determines the amount of heat and condensate loss, as well as its kindling time;

- the process of heat transfer and deaeration in the deaerator from the use of purge water as a heating medium in a pulsating flow mode is forcibly intensified;

- the stabilization time of water and steam regimes is reduced, as a result of which the efficiency and environmental friendliness of the operation of the heat generating installation are ensured.

Claims (1)

A heat generating installation comprising high and low pressure steam boilers with steam extraction pipelines, two deaerators with heating medium supply pipelines, while the deaerators are connected to steam boilers via feed water pipelines with pumps installed on them, and the purge water pipeline of the high pressure steam boiler is connected to the pipeline supply of a heating medium for the deaerator of a low pressure steam boiler, characterized in that it further comprises a shock assembly, a pulse supercharger with diaphragms gmoy and two check valves, wherein the shock assembly is installed in feedwater piping high pressure steam boiler, a pulse plenum connected between series-connected check valve installed in the pipeline blowdown and feedwater pipe of high pressure steam boiler.

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