CN211625289U - Power plant's boiler is arranged sediment waste heat recovery and is utilized system - Google Patents

Abstract

The utility model discloses a power plant boiler deslagging waste heat recycling system, which is provided with a roller slag cooler, a first heat exchanger, a second heat exchanger and a third heat exchanger, wherein the water outlet and the water return port of the roller slag cooler are respectively connected with a water outlet pipeline and a water return pipeline, a first heat source medium inlet valve, a second heat source medium inlet valve and a third heat source medium inlet valve are respectively connected with a water outlet pipeline, the water-cooling system comprises a water storage tank, a first cold source medium inlet valve, a second cold source medium inlet valve, a third cold source medium inlet valve, a fourth heat exchanger and a water storage tank, wherein the water storage tank is communicated with the water inlet pipe and the water outlet pipe respectively, the fourth cold source medium inlet valve is communicated with the water outlet pipe through a hot water inlet pipeline, and the water outlet valve is communicated with the water return pipeline through a cold water outlet pipeline. Use the utility model discloses can make full use of power plant's slag waste heat afterwards.

Description

Power plant's boiler is arranged sediment waste heat recovery and is utilized system

Technical Field

The utility model relates to a boiler slag waste heat comprehensive utilization of power plant technique, specifically speaking relate to a boiler of power plant arranges sediment waste heat recovery and utilization system.

Background

The thermal power plant uses coal as fuel, the coal is burned in a boiler, water in the boiler is heated to generate steam, then the steam with certain temperature and pressure is sent into a turbine, the heat energy of the steam is converted into mechanical energy of the turbine, and a coupling drives a generator to generate electricity. The steam after expansion work is discharged from the steam exhaust part of the steam turbine, the steam is discharged to the condenser to form condensed water, and then the condensed water is sent to the heater and sent to the boiler through the water feeding pump to be continuously heated into steam, and the circulation is carried out. The working principle is an energy conversion process, namely chemical energy, thermal energy, kinetic energy, mechanical energy and electric energy. Slag after coal combustion is discharged from the bottom of the boiler. The slag belongs to the production waste material of thermal power factory, and the temperature of slag is high and output is big, is the important one of the heat dissipation loss of power plant to, along with the increase of the power plant's low grade coal blending burning dynamics, boiler slag output also is increasing, and the slag heat increases, how can make full use of slag heat, becomes a critical technology that thermal power plant needs the solution urgently.

The existing urban hot water supply stations have two types, one is to heat hot water by using a coal-fired boiler, and the boiler not only wastes energy but also causes pollution to the environment. The other is to directly use electric energy to heat hot water, and although the boiler does not cause environmental pollution, the energy consumption is relatively high and the water supply cost is also high. The above two ways of supplying hot water in a centralized manner have the disadvantages of energy waste, environmental pollution and high water supply cost.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a power plant's boiler of thermal power plant's slag waste heat can abundant recycle system of sediment waste heat recovery.

In order to solve the technical problem, the utility model discloses a power plant's boiler arranges sediment waste heat recovery and utilizes system has cold sediment ware of cylinder, first, second and third heat exchanger, and the heat source medium of first, second and third heat exchanger advances, the exit end is equipped with first, second and third heat source medium respectively and advances, the outlet end is equipped with first, second and third cold source medium respectively and advances, the exit end, the play, the return water mouth of cold sediment ware of cylinder links to each other respectively and goes out, the return water pipeline, first, second and third heat source medium inlet valve links to each other with water outlet pipe line respectively, and first, second and third heat source medium outlet valve link to each other with the return water pipeline respectively, still including steam turbine condensate water supply, return water pipeline and open water supply, return water pipeline, first cold source medium inlet valve links to each other with steam turbine condensate water supply line respectively, the first cold source medium outlet valve and the second cold source medium outlet valve are respectively connected with a condensate water return pipeline of the steam turbine, the third cold source medium inlet valve is connected with an open water supply pipeline, the third cold source medium outlet valve is connected with the open water return pipeline, a circulating water pump is arranged on a water outlet pipeline between the roller slag cooler and the first heat source medium inlet valve, a water inlet valve is arranged on the water outlet pipeline on the front side of the circulating water pump, and a check valve and a water outlet valve are sequentially arranged on a water outlet pipeline on the rear side of the circulating water pump; the water storage tank is connected with a softened water replenishing pipeline through a water tank inlet valve and is connected with a drainage pipeline through a water tank outlet valve, a heat source medium inlet end and a heat source medium outlet end of the fourth heat exchanger are respectively provided with a fourth heat source medium inlet, and the inlet end and the outlet end of a cold source medium of the fourth heat exchanger are respectively provided with a fourth cold source medium inlet valve and a fourth cold source medium outlet valve, the fourth cold source medium inlet valve is communicated with the upper part of the water storage tank through a water inlet pipe, a water inlet pump is arranged on the water inlet pipe, the fourth cold source medium outlet valve is communicated with the lower part of the water storage tank through a water outlet pipe, the fourth heat source medium inlet valve is communicated with a water outlet pipeline positioned between the water outlet valve and the first heat source medium inlet valve through a hot water inlet pipeline, and the fourth heat source medium outlet valve is communicated with a water return pipeline positioned between the roller slag cooler and the first heat source medium.

Adopt the power plant's boiler who constitutes of above-mentioned structure to arrange sediment waste heat recovery and utilization system, the slag waste heat is by connecting on the one hand the first, second heat exchanger heat transfer on the cold sediment ware of cylinder goes out, the return water line heats the recycle to steam turbine condensate water, and on the other hand is by connecting the fourth heat exchanger heat transfer on the cold sediment ware of cylinder goes out, the return water line is to the water heating recycle in the storage water tank, can provide hot water for city hot water supply station after the water heating in the storage water tank, and the corresponding design can be made according to the actual output of firepower plant's slag to the size of storage water tank volume, the third heat exchanger is reserve, when first, second and fourth heat exchanger heat transfer ability appear not enough or break down, can discharge the heat to external environment in by the third heat exchanger heat transfer.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of the structure of the slag discharge waste heat recovery system of the power plant boiler.

Detailed Description

Referring to fig. 1, the utility model relates to a power plant boiler slag discharge waste heat recycling system, which comprises a roller slag cooler 10, a first heat exchanger 20, a second heat exchanger 20, a third heat exchanger 30, a third heat exchanger 40, a first heat source medium inlet and outlet valve 21, a second heat source medium outlet and outlet valve 21, 22, 31, 32, 41, 42 are respectively installed at the heat source medium inlet and outlet ends of the first heat exchanger 20, the second heat exchanger 20, the third heat exchanger 30, 40, a first cold source medium inlet and outlet valve 23, a second cold source medium outlet and outlet valve 23, 24, 33, 34, 43, 44 are respectively installed at the cold source medium inlet and outlet ends of the first heat exchanger, the second heat exchanger 20, the third heat exchanger 30, 40, an outlet valve 21, a second heat source medium outlet valve 31, 41 are respectively connected with a water outlet pipeline 11, a first heat source medium, a second heat source medium 22, a third heat source medium outlet valve 32, 42 are respectively connected with a water return pipeline 12, also comprises condensed water supply and return pipelines 51 and 52 of the turbine and open water supply and return pipelines 53 and 54 which are generally connected with a circulating water tower to dissipate the heat of the third heat exchanger to the external environment, the first cold source medium inlet valve 23, the second cold source medium inlet valve 33 are respectively connected with a turbine condensed water supply pipeline 51, the first cold source medium outlet valve 24, the second cold source medium outlet valve 34 are respectively connected with a turbine condensed water return pipeline 52, the third cold source medium inlet valve 43 is connected with an open water supply pipeline 53, the third cold source medium outlet valve 44 is connected with an open water return pipeline 54, a water outlet pipeline 11 between the roller slag cooler 10 and the first heat source medium inlet valve 21 is provided with a circulating water pump 13, a water inlet valve 14 is arranged on a water outlet pipeline on the front side of the circulating water pump 13, and a check valve 15 and a water outlet valve 16 are sequentially arranged on a water outlet pipeline on the rear side of the circulating water pump 13; the system also comprises a fourth heat exchanger 60 and a water storage tank 70, wherein the water storage tank 70 is connected with a softened water replenishing water pipeline 72 through a water tank inlet valve 71 and is connected with a drain pipeline 74 through a water tank outlet valve 73, the inlet end and the outlet end of a heat source medium of the fourth heat exchanger 60 are respectively provided with a fourth heat source medium inlet valve 61 and a fourth heat source medium outlet valve 62, the inlet end and the outlet end of a cold source medium of the fourth heat exchanger 60 are respectively provided with a fourth cold source medium inlet valve 63 and a fourth cold source medium outlet valve 64, the fourth cold source medium inlet valve 63 is communicated with the upper part of the water storage tank 70 through a water inlet pipe 65, the water inlet pipe 65 is provided with a water inlet pump 66, the fourth cold source medium outlet valve 64 is communicated with the lower part of the water storage tank 70 through a water outlet pipe 67, the fourth heat source medium inlet valve 61 is communicated with a water outlet pipe 11 positioned between the water outlet valve 16 and the first heat source medium inlet valve The wires 12 are in communication.

Claims (1)

1. The utility model provides a power plant's boiler row sediment waste heat recovery utilizes system which characterized in that: the device is provided with a roller slag cooler, a first heat exchanger, a second heat exchanger and a third heat exchanger, wherein the heat source medium inlet end and the heat source medium outlet end of the first heat exchanger, the second heat exchanger and the third heat exchanger are respectively provided with a first heat source medium inlet valve, a second heat source medium outlet valve and a third heat source medium inlet valve, the cold source medium inlet end and the cold source medium outlet end of the first heat exchanger, the second heat exchanger and the third heat exchanger are respectively provided with a first cold source medium inlet valve and a third cold source medium outlet valve, the outlet and the return water port of the roller slag cooler are respectively connected with an outlet pipeline and a return pipeline, the first heat source medium inlet valve, the second heat source medium inlet valve and the third heat source medium outlet valve are respectively connected with the return pipeline, the device also comprises a turbine condensed water supply pipeline and a return pipeline, an open type water supply pipeline and an open type water return pipeline, the first cold source medium inlet valve and the second cold source medium outlet valve are respectively connected with the turbine condensed, a third cold source medium inlet valve is connected with an open water supply pipeline, a third cold source medium outlet valve is connected with an open water return pipeline, a water outlet pipeline positioned between the roller slag cooler and the first heat source medium inlet valve is provided with a circulating water pump, a water inlet valve is arranged on the water outlet pipeline at the front side of the circulating water pump, and a check valve and a water outlet valve are sequentially arranged on the water outlet pipeline at the rear side of the circulating water pump; the water storage tank is connected with a softened water replenishing pipeline through a water tank inlet valve and is connected with a drainage pipeline through a water tank outlet valve, a heat source medium inlet end and a heat source medium outlet end of the fourth heat exchanger are respectively provided with a fourth heat source medium inlet, and the inlet end and the outlet end of a cold source medium of the fourth heat exchanger are respectively provided with a fourth cold source medium inlet valve and a fourth cold source medium outlet valve, the fourth cold source medium inlet valve is communicated with the upper part of the water storage tank through a water inlet pipe, a water inlet pump is arranged on the water inlet pipe, the fourth cold source medium outlet valve is communicated with the lower part of the water storage tank through a water outlet pipe, the fourth heat source medium inlet valve is communicated with a water outlet pipeline positioned between the water outlet valve and the first heat source medium inlet valve through a hot water inlet pipeline, and the fourth heat source medium outlet valve is communicated with a water return pipeline positioned between the roller slag cooler and the first heat source medium.

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