CN216131911U - Device based on boiler and stirling machine combine - Google Patents

Abstract

The utility model relates to a device based on combination of a boiler and a Stirling engine, which comprises a boiler furnace, a Stirling engine hot cavity, a Stirling engine cold cavity, a generator, a pure water tank, a pure water pump, a cold cavity cooling device, a deaerator, a water feeding pump, a water feeding backheating device, a boiler economizer and a boiler steam drum. The device utilizes high-temperature flue gas in a boiler hearth as a high-temperature heat source stably supplied to a heat cavity of the Stirling engine, and improves hot end parameters. The heat released by the cold cavity is fully absorbed by pure water and enters a boiler water supply regenerative system for recycling, and the cycle efficiency of the Stirling power generation device is greatly improved. The output line of the Stirling engine generator is connected to a low-voltage power distribution bus for service power of a boiler room, and the low-voltage power distribution bus is consumed on the spot, so that the service power consumption rate of the boiler is reduced.

Description

Device based on boiler and stirling machine combine

Technical Field

The utility model relates to a device based on combination of a boiler and a Stirling engine.

Background

In recent years, the stirling engine power generation technology has been rapidly developed and is mainly applied to the fields of small-sized biomass power generation, small-sized garbage power generation and small-sized solar photo-thermal power generation. The Stirling engine is a closed external combustion engine, an external combustion system is an important component of the Stirling engine, and the main function of the Stirling engine is to convert chemical energy of fuel into heat energy and transmit the heat energy to a working medium in a hot end machine through reasonably and efficiently organizing combustion and heat exchange, so that the working medium in the machine expands in the engine to work, and the heat energy is converted into mechanical energy to drive a generator to generate electricity. The efficiency of the Stirling engine is not only determined by the circulation efficiency of the engine, but also has great relation with the combustion efficiency of an external combustion system and the heat exchange efficiency of the hot end and the cold end. Therefore, to design an efficient and reliable stirling engine system, the design of an external combustion system and the heat exchange design of a cold end are very important. The traditional Stirling engine power generation system is low in comprehensive heat efficiency due to the fact that the traditional Stirling engine power generation system is small in size and limited in fuel type, an external combustion device is low in combustion efficiency and low in hot end temperature, and regenerative absorption after cold end heat exchange is insufficient.

Disclosure of Invention

The utility model aims to specially design an external combustion system and a cold end heat exchange device of a Stirling engine so as to improve the comprehensive thermal efficiency of a Stirling engine power generation system, and provides a device based on combination of a boiler and the Stirling engine.

The utility model adopts the technical scheme that a device based on combination of a boiler and a Stirling engine comprises a boiler hearth, a Stirling engine hot cavity, a Stirling engine cold cavity, a generator, a pure water tank, a pure water pump, a cold cavity cooling device, a deaerator, a water feeding pump, a water feeding heat regenerator, a boiler economizer and a boiler steam drum, boiler furnace is connected with the hot chamber of stirling, the cold chamber of stirling is installed outdoors, cold chamber surface connection has cold chamber cooling device, cold chamber cooling device inner medium is pure water (demineralized water), cooling device inlet end is connected in pure water pump exit end, the cooling device exit end is connected in the oxygen-eliminating device entrance point, the oxygen-eliminating device exit end is connected in the feed pump entrance point, feed pump inlet end is connected in the feed water backheat device entrance point, the feed water backheat device exit end is connected in boiler economizer entrance point, boiler economizer exit end is connected in boiler steam pocket entrance point.

Furthermore, the boiler is an industrial boiler or a power station boiler, the combustion efficiency is high, and the combustion temperature in the hearth is high.

Further, the pure water is softened water, demineralized water and the like, and is a heat absorption medium in various industrial boilers or power station boilers.

Further, the feed water heat recovery device is a high-pressure heater or a low-temperature economizer or the like.

Compared with the prior art, the utility model has the following obvious effects: the Stirling engine external combustion system has stable combustion, high combustion efficiency and high hot end parameter; and the heat radiation heat of the cold end of the Stirling engine is fully recycled. The generated energy of the Stirling engine generator is connected to a boiler station service low-voltage bus, so that the generated energy is consumed on the spot, and the station service power consumption rate is reduced.

Drawings

The utility model is further described with reference to the following figures.

Fig. 1 is a schematic structural diagram of the device.

In the figure: 1-boiler furnace; 2-boiler economizer; 3-boiler drum; 4-a deaerator; 5-a water supply pump; 6-a water supply heat regenerative device; 7-a pure water pump; 8-stirling machine device; 81-thermal chamber; 82-a cold chamber; 83-cold chamber cooling means; 84-a generator; 9-pure water tank.

Detailed Description

The utility model is further described with reference to the following figures and detailed description.

As shown in figure 1, the device based on combination of the boiler and the Stirling engine comprises a boiler furnace chamber, a Stirling engine hot chamber, a Stirling engine cold chamber, a generator, a pure water tank, a pure water pump, a cold chamber cooling device, a deaerator, a water feeding pump, a water feeding backheating device, a boiler economizer and a boiler steam drum, wherein the boiler furnace chamber (1) is connected with the Stirling engine hot chamber (81), the Stirling engine cold chamber (82) is arranged outdoors, the outer surface of the cold chamber is connected with the cold chamber cooling device (83), the medium in the cold chamber cooling device is pure water, the inlet end of the cooling device (83) is connected with the outlet end of the pure water pump (7), the outlet end of the cooling device (83) is connected with the deaerator (4), the outlet end of the deaerator (4) is connected with the inlet end of the water feeding pump (5), the inlet end of the water feeding pump (5) is connected with the inlet end of the water feeding backheating device (6), the outlet end of the water feeding backheating device (6) is connected with the boiler economizer (2), the outlet end of the boiler economizer (2) is connected with the inlet end of the boiler steam drum (2).

In the embodiment, a boiler furnace (1) is used as a stable external heat source of the Stirling engine to heat a Stirling engine hot cavity (81), the hot cavity (81) is heated to expand to push a piston to do work, and a cold cavity cooling device (83) continuously cools a cold cavity (82), so that a Stirling engine device (8) continuously reciprocates, and a Stirling engine generator (84) is ensured to continuously output a stable power supply.

In the embodiment, the medium in the cold cavity cooling device (83) of the Stirling engine is pure water, namely softened water or demineralized water for a boiler, and the pure water or the demineralized water is conveyed to the deaerator (4) after sufficient heat exchange in the cold cavity cooling device (83).

Any technical solution disclosed in the above patent, unless otherwise indicated, if a range of values is disclosed, then the range of values disclosed is a preferred range of values and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.

If this patent discloses or refers to parts or structures that are fixedly connected to each other, the fixedly connected may be understood as: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In the description of this patent, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the patent, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the patents and not for limiting the same; although the present patent is described in detail with reference to preferred embodiments, it should be understood by those of ordinary skill in the art that: modifications to the embodiments of the patent or equivalent replacements of some of the technical features; all such modifications are intended to be included within the scope of this patent without departing from the spirit of the claims.

Claims (5)

1. A device based on boiler and stirling machine combine which characterized in that: comprises a boiler, a Stirling engine, a pure water tank, a pure water pump, a deaerator and a boiler feed pump; the boiler is conventional boiler, including boiler furnace, economizer, steam pocket, feedwater backheating device, the economizer input is connected in feedwater backheating device exit end, feedwater backheating device input is connected in the feed-water pump exit end, feed-water pump entrance point is connected in the oxygen-eliminating device exit end.

2. The combination boiler and stirling machine based apparatus of claim 1 wherein: the Stirling engine comprises a hot cavity, a cold cavity cooling device and a generator, wherein the hot cavity of the Stirling engine is connected inside a boiler furnace, the cold cavity of the Stirling engine is installed outside the furnace, the medium of the cold cavity cooling device is pure water, the inlet end of the cooling device is connected to the outlet end of a pure water pump, and the outlet end of the cold cavity cooling device is connected to the inlet end of a deaerator.

3. The combination boiler and stirling machine based apparatus of claim 1 wherein: the inlet end of the pure water pump is connected with the outlet end of the pure water tank.

4. The combination boiler and stirling machine based apparatus of claim 1 wherein: and the outlet wire of the Stirling engine generator is connected to a low-voltage distribution bus for service power of a boiler room.

5. The combination boiler and stirling machine based apparatus of claim 1 wherein: the feed water heat recovery device is a high-pressure heater or a low-temperature economizer.

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