A dual mode stirling engine with a preheater and method of implementing the same

Abstract

The application discloses a dual-mode Stirling engine with a preheater and an implementation method thereof, which comprises a combustion chamber and a preheater body, the combustion chamber has an air combustion mode and a pure oxygen combustion mode, the preheater body is arranged outside the combustion chamber, a plurality of pipelines are integrated in the preheater body, the plurality of pipelines are arranged around the circumferential direction of the combustion chamber, and the plurality of pipelines comprise an air pipeline, an oxygen pipeline, an exhaust pipeline, a cooling water pipeline and a condensed water pipeline. The preheater provided by the application is arranged outside the combustion chamber and is used for bearing the pressure generated during the operation of the combustion chamber. Meanwhile, the plurality of pipelines integrated in the preheater meet the requirements of the dual-mode Stirling engine on air and oxygen. The exhaust in the exhaust pipeline can preheat air, the cooling water can exchange heat with the exhaust so that the exhaust reaches a safe temperature and is discharged, and the condensed water can be collected and discharged. The application has the characteristics of compact structure, reasonable pipeline arrangement and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engine, in particular to a dual-mode Stirling engine with a preheater and an implementation method thereof. BACKGROUND

[0002] The Stirling engine first appeared in Europe and the United States, which is a device that converts heat energy into mechanical energy by burning fuel, has the advantages of low noise, smooth operation, wide application range, etc., and is suitable for various fuels and different air pressure environments.

[0003] With the continuous development of Stirling engine, the combustion-supporting agent of Stirling engine needs to be switched to external air or pure oxygen to cope with different working occasions. When external air is used as the combustion-supporting agent, a preheater is needed to preheat the air to improve the combustion efficiency of the engine and reduce the waste caused by the direct discharge of heat due to the long-time high temperature of the engine. When pure oxygen is used as the combustion-supporting agent, the fuel burns violently, and the pressure increases, so the engine needs to withstand a larger pressure.

[0004] Due to the size limitation of the Stirling engine, the Stirling engine urgently needs a preheater to meet the demand of external air or pure oxygen as the combustion-supporting agent. SUMMARY

[0005] In view of the above problems, the present application provides a dual-mode Stirling engine with a preheater and an implementation method thereof, which realizes the supply of air and oxygen required by the engine through one preheater, and also realizes the functions of air preheating and exhaust gas heat exchange cooling on one preheater, improves the combustion efficiency of the Stirling engine, and has the characteristics of compact structure, reasonable layout, small size, etc.

[0006] In order to achieve the above purpose, the present application provides a dual-mode Stirling engine with a preheater, which comprises:

[0007] a combustion chamber, the combustion chamber has an air combustion mode and a pure oxygen combustion mode;

[0008] a preheater body, the preheater body is arranged outside the combustion chamber, the preheater body is internally integrated with a plurality of pipelines, the plurality of pipelines are arranged around the circumferential direction of the combustion chamber, and the plurality of pipelines include an air pipeline, an oxygen pipeline, an exhaust gas pipeline, a cooling water pipeline and a condensate water pipeline;

[0009] In the air combustion mode, the exhaust gas in the exhaust gas pipeline preheats the air in the air pipeline, which is used to preheat the air before entering the combustion chamber for combustion, and the exhaust gas in the exhaust gas pipeline exchanges heat with the cooling water in the cooling water pipeline;

[0010] In the pure oxygen combustion mode, the oxygen in the oxygen pipeline is combusted in the combustion chamber, and the cooling water in the cooling water pipeline exchanges heat with the tail gas in the tail gas pipeline;

[0011] The condensate water pipeline is used to discharge condensate water from the preheater body.

[0012] In some embodiments, the air pipeline is provided in several, and one end of the several air pipelines is arranged on the preheater body and communicates with the external environment, and the other end communicates with the inside of the combustion chamber, for inputting external air into the combustion chamber;

[0013] The oxygen pipeline is provided in several, and one end of the several oxygen pipelines is arranged on the preheater body, and the other end communicates with the inside of the combustion chamber, for inputting oxygen into the combustion chamber;

[0014] The tail gas pipeline is provided in several, and one end of the several tail gas pipelines communicates with the inside of the combustion chamber, and the other end is arranged on the preheater body, for discharging tail gas;

[0015] The cooling water pipeline is provided in several, and the two ends of the cooling water pipeline are arranged on the preheater body;

[0016] One end of the condensate water pipeline is connected with the tail gas pipeline, and the other end is arranged on the preheater body, for collecting and discharging condensate water.

[0017] In some embodiments, the air pipeline includes an outer air pipeline, an air transition pipeline, an inner air pipeline, and an air nozzle pipeline, and communicates with each other;

[0018] and / or

[0019] The tail gas pipeline includes an outer tail gas pipeline, a tail gas transition pipeline, and an inner tail gas pipeline, and communicates with each other;

[0020] and / or

[0021] The cooling water pipeline includes an outer cooling water pipeline, an inner cooling water connecting pipeline, an inner cooling water transition pipeline, an inner cooling water pipeline, an inner cooling water outlet transition pipeline, and an inner cooling water converging pipeline, and communicates with each other;

[0022] and / or

[0023] The oxygen pipeline is also connected with an oxygen nozzle pipeline.

[0024] In some embodiments, the preheater body is divided into an inner heat exchange zone, an inner-outer transition zone and an outer heat exchange zone, which are sequentially sleeved around the combustion chamber.

[0025] In some embodiments, the inner-outer transition zone is provided with a plurality of mounting holes penetrating through the preheater body and arranged in a circle, for connecting and fixing external devices.

[0026] The inner layer cooling water connecting pipeline, the air transition pipeline, the tail gas transition pipeline and the inner layer cooling water outlet transition pipeline are arranged through the interval area of the mounting hole, and the number of the inner layer cooling water connecting pipeline, the air transition pipeline, the tail gas transition pipeline and the inner layer cooling water outlet transition pipeline is less than the number of adjacent pipelines.

[0027] In some embodiments, the air pipeline further comprises an air inlet ring cavity, an air outside transition ring cavity, an air inside transition ring cavity, a preheated air ring cavity and a preheated air uniform flow chamber.

[0028] The air inlet ring cavity is arranged at one end of the outer layer air pipeline, and the air inlet ring cavity is in communication with the external environment.

[0029] The air outside transition ring cavity is in communication with the other end of the outer layer air pipeline and one end of the air transition pipeline.

[0030] The other end of the air transition pipeline is in communication with the air inside transition ring cavity, and the air inside transition ring cavity is connected with one end of the inner layer air pipeline.

[0031] The other end of the inner layer air pipeline is connected with the preheated air ring cavity, the preheated air ring cavity is in communication with the preheated air uniform flow chamber, and the preheated air uniform flow chamber is in communication with one end of the air nozzle pipeline, and the other end of the air nozzle pipeline is in communication with the combustion chamber.

[0032] In some embodiments, the tail gas pipeline further comprises a tail gas inside transition ring cavity, a tail gas outside transition ring cavity and a tail gas exhaust ring cavity.

[0033] One end of the inner layer tail gas pipeline is in communication with the combustion chamber, and the other end is in communication with the tail gas inside transition ring cavity, and the tail gas inside transition ring cavity is in communication with one end of the tail gas transition pipeline.

[0034] The other end of the tail gas transition pipeline is in communication with the tail gas outside transition ring cavity, and the tail gas outside transition ring cavity is in communication with one end of the outer layer tail gas pipeline, and the other end of the outer layer tail gas pipeline is in communication with the tail gas exhaust ring cavity.

[0035] The tail gas exhaust ring cavity is in communication with the external environment.

[0036] In some embodiments, the cooling water pipeline further comprises an outer layer cooling water inlet ring cavity, a cooling water outlet ring cavity, an inner layer cooling water inlet ring cavity, an inner layer cooling water inner-outer connecting ring cavity, an inner layer cooling water inner side inlet transition ring cavity, an inner layer cooling water inner side outlet transition ring cavity, and an inner layer cooling water outer side transition ring cavity.

[0037] The outer layer cooling water inlet ring cavity is in communication with the external environment and is connected to one end of the outer layer cooling water pipeline. The other end of the outer layer cooling water pipeline is in communication with the cooling water outlet ring cavity. The cooling water outlet ring cavity is in communication with the external environment.

[0038] The inner layer cooling water inlet ring cavity is in communication with the external environment and is connected to one end of the inner layer cooling water connecting pipeline. The other end of the inner layer cooling water connecting pipeline is connected to the inner layer cooling water inner-outer connecting ring cavity.

[0039] The inner layer cooling water inner-outer connecting ring cavity is connected to one end of the inner layer cooling water transition pipeline. The other end of the inner layer cooling water transition pipeline is in communication with the inner layer cooling water inner side inlet transition ring cavity. The inner layer cooling water inner side inlet transition ring cavity is in communication with one end of the inner layer cooling water pipeline. The other end of the inner layer cooling water pipeline is connected to the inner layer cooling water inner side outlet transition ring cavity.

[0040] The inner layer cooling water inner side outlet transition ring cavity is in communication with one end of the inner layer cooling water outlet transition pipeline. The other end of the inner layer cooling water outlet transition pipeline is in communication with the inner layer cooling water outer side transition ring cavity. The inner layer cooling water outer side transition ring cavity is in communication with one end of the inner layer cooling water converging pipeline. The other end of the inner layer cooling water converging pipeline is in communication with the outer layer cooling water pipeline.

[0041] In some embodiments, the condensate water pipeline further comprises a condensate water ring cavity.

[0042] One end of the condensate water pipeline is in communication with the bottom of the outer layer tail gas pipeline. The other end of the condensate water pipeline is in communication with the condensate water ring cavity. The condensate water ring cavity is connected to the external environment.

[0043] In some embodiments, the oxygen pipeline further comprises an oxygen inlet ring cavity and an oxygen inner side ring cavity.

[0044] The oxygen inlet ring cavity is connected to the external oxygen pipeline and is connected to one end of the oxygen pipeline. The other end of the oxygen pipeline is connected to the oxygen inner side ring cavity.

[0045] The oxygen inner side ring cavity is connected to one end of the oxygen nozzle pipeline. The other end of the oxygen nozzle pipeline is connected to the oxygen nozzle.

[0046] In some embodiments, the inner layer air pipeline and the inner layer tail gas pipeline are arranged in a circumferential order alternately, for realizing heat exchange between air and tail gas.

[0047] The outer layer cooling water pipeline and the outer layer tail gas pipeline are arranged in a circumferential order alternately, for realizing heat exchange between cooling water and tail gas, so that the tail gas reaches a safe temperature.

[0048] The inner layer cooling water pipeline and the inner layer tail gas pipeline are arranged in a circumferential order alternately, for realizing heat exchange between cooling water and tail gas in the pure oxygen closed combustion mode.

[0049] In some embodiments, the inner diameter of the oxygen nozzle is smaller than the pipe diameter of the oxygen nozzle pipeline, for improving the flow rate of oxygen ejected from the oxygen nozzle.

[0050] In some embodiments, the air inner side transition ring cavity accounts for about 1 / 3 of the total height of the preheater body.

[0051] The application also provides an implementation method for the dual-mode Stirling engine with a preheater.

[0052] In the air combustion mode, cooling water is circulated in the cooling water pipeline, and air in the external environment is heated through heat exchange with the tail gas in the tail gas pipeline and then enters the combustion chamber to participate in combustion, the tail gas generated in the combustion chamber is heated through heat exchange with the air in the air pipeline and the cooling water in the cooling water pipeline and then is discharged to the outside of the preheater body, and the condensed water generated after heat exchange of the tail gas is discharged to the outside of the preheater body through the condensed water pipeline.

[0053] In the oxygen combustion mode, cooling water is circulated in the cooling water pipeline, and oxygen in the external environment enters the combustion chamber through the oxygen pipeline to participate in combustion, the tail gas generated in the combustion chamber is heated through heat exchange with the cooling water in the cooling water pipeline and then is discharged to the outside of the preheater body, and the condensed water generated after heat exchange of the tail gas is discharged to the outside of the preheater body through the condensed water pipeline.

[0054] The Stirling engine with a preheater and the implementation method thereof provided by the application have the following beneficial effects:

[0055] 1. The Stirling engine with a preheater and its implementation method provided by the present invention have various pipelines arranged on a preheater body. On the one hand, the preheater can preheat the air in the air environment combustion mode to improve the combustion efficiency of the Stirling engine. On the other hand, the preheater can exchange heat with the exhaust gas in the air environment combustion mode and the pure oxygen closed combustion mode, so that the exhaust gas is cooled to a safe temperature for discharge. The structure is compact and the layout is reasonable, which improves the applicability of the Stirling engine.

[0056] 2. The Stirling engine with a preheater and its implementation method provided by the present invention, wherein the inner heat exchange zone, the inner and outer transition zone and the outer heat exchange zone are sequentially arranged outside the combustion chamber, and the preheater serves to withstand the pressure generated by the Stirling engine in the pure oxygen closed combustion mode.

[0057] 3. The Stirling engine with a preheater and its implementation method provided by the present invention, wherein the preheater is provided with mounting holes to facilitate the installation of the Stirling engine onto other external devices. Attached Figure Description

[0058] The preferred embodiments will now be described in a clear and easy-to-understand manner, with reference to the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of this solution.

[0059] Figure 1 This is a three-dimensional structural diagram of a dual-mode Stirling engine with a preheater provided by the present invention;

[0060] Figure 2 This is a top view of a dual-mode Stirling engine with a preheater provided by the present invention;

[0061] Figure 3 This is a bottom view of a dual-mode Stirling engine with a preheater provided by the present invention;

[0062] Figure 4 This invention provides a dual-mode Stirling engine with a preheater. Figure 2 Cross-sectional view of AA;

[0063] Figure 5 This invention provides a dual-mode Stirling engine with a preheater. Figure 3 Cross-sectional view of CC;

[0064] Figure 6 This invention provides a dual-mode Stirling engine with a preheater. Figure 3 Cross-sectional view of DD;

[0065] Figure 7 This invention provides a dual-mode Stirling engine with a preheater.Figure 2 B-B is a sectional view of the preheater;

[0066] Figure 8 is a partial enlarged view of an oxygen nozzle of a dual-mode Stirling engine with a preheater provided by the present application.

[0067] BRIEF DESCRIPTION OF DRAWINGS

[0068] Preheater body 1000

[0069] Outer layer heat exchange zone 1100, air inlet annular chamber 1110, outer layer cooling water inlet annular chamber 1120, cooling water outlet annular chamber 1130, inner layer cooling water inlet annular chamber 1140, oxygen inlet annular chamber 1150, exhaust gas outlet annular chamber 1160, condensate water annular chamber 1170

[0070] Inner-outer transition zone 1200, air outer side transition annular chamber 1210, air inner side transition annular chamber 1220, inner layer cooling water inner-outer connection annular chamber 1230, inner layer cooling water outer side transition annular chamber 1240, exhaust gas inner side transition annular chamber 1250, exhaust gas outer side transition annular chamber 1260, inner layer cooling water inner side outlet transition annular chamber 1270, mounting hole 1280

[0071] Inner layer heat exchange zone 1300, preheated air annular chamber 1310, preheated air flow uniformizing chamber 1320, inner layer cooling water inner side inlet transition annular chamber 1330, oxygen inner side annular chamber 1340

[0072] Outer layer air pipeline 2100, air transition pipeline 2200, inner layer air pipeline 2300, air injection pipeline 2400

[0073] Outer layer exhaust gas pipeline 3100, exhaust gas transition pipeline 3200, inner layer exhaust gas pipeline 3300

[0074] Outer layer cooling water pipeline 4100, inner layer cooling water connection pipeline 4200, inner layer cooling water transition pipeline 4300, inner layer cooling water pipeline 4400, inner layer cooling water outlet transition pipeline 4500, inner layer cooling water confluence pipeline 4600

[0075] Oxygen pipeline 5100, oxygen nozzle pipeline 5200, oxygen nozzle 5300

[0076] Combustion chamber 6000 DETAILED DESCRIPTION

[0077] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0078] For the sake of simplicity of the drawings, only parts related to the present application are shown in each drawing, which do not represent the actual structure of the product. In addition, in order to make the drawings simple and easy to understand, in some drawings, only one of the components with the same structure or function is shown schematically, or only one of them is marked. In this document, "one" not only means "only one", but also means "more than one" situation.

[0079] It should be further understood that the term "and / or" used in the present application and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0080] In this document, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0081] In addition, in the description of the present application, the terms "first", "second", etc. are only used for differentiation and description, and cannot be understood as indicating or implying relative importance.

[0082] In one embodiment, with reference to the drawings Figures 1 to 8 A dual-mode Stirling engine with a preheater is described, the preheater body 1000 is suitable for the Stirling engine to run in air combustion mode and pure oxygen combustion mode, and various pipelines are integrated inside the preheater body 1000 to meet the supply of air and oxygen required by the dual-mode Stirling engine, and the air can be preheated and the exhaust gas can be exchanged, which has the characteristics of improving the efficiency of the Stirling engine and reducing heat loss.

[0083] Specifically, a Stirling engine with a preheater comprises a preheater body 1000 and a combustion chamber 6000. The combustion chamber 6000 can use air or oxygen as a combustion-supporting agent, and has an air-environment combustion mode and a pure-oxygen closed combustion mode. The preheater body 1000 is arranged outside the combustion chamber 6000 and communicates with the combustion chamber 6000.

[0084] Further, the preheater body 1000 is provided with multiple pipelines, including an air pipeline, an oxygen pipeline 5100, an exhaust pipeline, a cooling water pipeline, and a condensed water pipeline. The multiple pipelines are arranged inside the preheater body 1000 along the circumferential direction of the combustion chamber 6000. In the air combustion mode, the air in the air pipeline exchanges heat with the exhaust in the exhaust pipeline and then enters the combustion chamber 6000 to participate in combustion. In the pure-oxygen combustion mode, oxygen enters the combustion chamber 6000 through the oxygen pipeline 5100 to participate in combustion. In the air combustion mode or the pure-oxygen combustion mode, the exhaust in the exhaust pipeline can also exchange heat with the cooling water in the cooling water pipeline, so that the exhaust reaches a suitable temperature after heat exchange and is then discharged. When the Stirling engine is working, the condensed water produced by the exhaust after heat exchange with the condensed water is discharged from the preheater body 1000 through the condensed water pipeline.

[0085] In this embodiment, a dual-mode Stirling engine with a preheater can supply air and oxygen through one preheater, preheat air in the air combustion mode, and improve the working efficiency of the Stirling engine. In the pure-oxygen combustion mode, the fuel burns violently in the combustion chamber 6000, causing an increase in pressure. The preheater can function as a pressure shell to prevent mechanical damage to the combustion chamber 6000 caused by the increase in pressure. At the same time, the preheater can also cool the exhaust, so that the condensed water is discharged at a safe temperature.

[0086] In one embodiment, referring to the accompanying drawings Figures 1 to 8 In this embodiment, the air pipeline, the exhaust pipeline, the oxygen pipeline 5100, and the cooling water pipeline are each provided as a plurality of pipelines.

[0087] Specifically, one end of each of the plurality of air pipelines is arranged on the preheater body 1000 and connected to an external air pipeline for inputting external air. The air pipeline passes through the preheater body 1000 and communicates with the combustion chamber 6000, so that air enters the combustion chamber 6000 through the air pipeline to participate in combustion. Correspondingly, one end of each of the plurality of oxygen pipelines 5100 is arranged on the preheater body 1000 and connected to an external oxygen input pipeline for inputting external oxygen, and the other end of the oxygen pipeline 5100 communicates with the combustion chamber 6000, so that oxygen enters the combustion chamber 6000 through the oxygen pipeline 5100 to participate in combustion.

[0088] Further, several exhaust gas pipes are arranged through the preheater body 1000, one end of the exhaust gas pipes is communicated with the combustion chamber 6000, and the other end is arranged on the preheater body 1000. When the Stirling engine works, the exhaust gas generated can be discharged to the outside of the preheater body 1000 through the exhaust gas pipes.

[0089] Further, two ends of several cooling water pipes are arranged on the preheater body 1000, and the cooling water pipes are arranged in the preheater body 1000. Correspondingly, the cooling water flows into one end of the cooling water pipes and exchanges heat with the exhaust gas in the exhaust gas pipes, and then flows out from the other end of the cooling water pipes.

[0090] One end of the condensate pipe is connected with the exhaust gas pipe, and the other end is arranged at the bottom of the preheater body 1000, so that the condensate can be discharged from the preheater body 1000.

[0091] In one embodiment, referring to the drawings Figures 1 to 8 The preheater body 1000 is further described in the embodiment. The air pipes include an outer air pipe 2100, an air transition pipe 2200, an inner air pipe 2300 and an air nozzle pipe 2400, and the outer air pipe 2100, the air transition pipe 2200, the inner air pipe 2300 and the air nozzle pipe 2400 are communicated in sequence.

[0092] Further, the exhaust gas pipes include an outer exhaust gas pipe 3100, an exhaust gas transition pipe 3200 and an inner exhaust gas pipe 3300, and the outer exhaust gas pipe 3100, the exhaust gas transition pipe 3200 and the inner exhaust gas pipe 3300 are communicated in sequence.

[0093] Further, the cooling water pipes include an outer cooling water pipe 4100, an inner cooling water connecting pipe 4200, an inner cooling water transition pipe 4300, an inner cooling water pipe 4400, an inner cooling water outlet transition pipe 4500 and an inner cooling water converging pipe 4600, and the outer cooling water pipe 4100, the inner cooling water connecting pipe 4200, the inner cooling water transition pipe 4300, the inner cooling water pipe 4400, the inner cooling water outlet transition pipe 4500 and the inner cooling water converging pipe 4600 are communicated in sequence.

[0094] Further, the oxygen pipe 5100 is connected with an oxygen nozzle pipe 5200.

[0095] In one embodiment, referring to the drawings Figure 2The preheater body 1000 is further partitioned in this embodiment. The preheater body 1000 is divided into an outer heat exchange zone 1100, an inner-outer transition zone 1200 and an inner heat exchange zone 1300, and the outer heat exchange zone 1100 is arranged at the outermost side of the Stirling engine, and the inner-outer transition zone 1200 and the inner heat exchange zone 1300 are arranged in sequence.

[0096] In this embodiment, the outer heat exchange zone 1100, the inner-outer transition zone 1200 and the inner heat exchange zone 1300 are arranged in sequence outside the periphery of the combustion chamber 6000, for bearing the pressure of the combustion chamber 6000 in the oxygen combustion mode, improving the structural strength of the Stirling engine. At the same time, it can reduce the heat loss of the combustion chamber 6000. It is worth noting that, referring to the drawings of the specification Figures 1 to 8 , the outer air pipeline 2100, the outer exhaust pipeline 3100, the outer cooling water pipeline 4100, the inner cooling water connecting pipeline 4200, the inner cooling water converging pipeline 4600 and the condensed water pipeline are located in the outer heat exchange zone 1100, the air transition pipeline 2200, the inner cooling water outlet transition pipeline 4500 and the exhaust transition pipeline 3200 are located in the inner-outer transition zone 1200, and the inner air pipeline 2300, the inner exhaust pipeline 3300, the inner cooling water transition pipeline 4300 and the inner cooling water pipeline 4400 are located in the inner heat exchange zone 1300.

[0097] In one embodiment, referring to the drawings of the specification Figure 2 The inner-outer transition zone 1200 is provided with a plurality of mounting holes 1280 penetrating the preheater body 1000 and arranged in a circle, for connecting and fixing external devices.

[0098] Referring to the drawings of the specification Figures 1 to 8 The inner cooling water connecting pipeline 4200, the air transition pipeline 2200, the exhaust transition pipeline 3200 and the inner cooling water outlet transition pipeline 4500 are arranged through the spacing area of the mounting hole 1280, and the number of the inner cooling water connecting pipeline 4200, the air transition pipeline 2200, the exhaust transition pipeline 3200 and the inner cooling water outlet transition pipeline 4500 is less than the number of adjacent pipelines.

[0099] In this embodiment, the inner-outer transition zone 1200 is provided with the mounting hole 1280, and the Stirling engine can be mounted on the external device by cooperating the mounting hole 1280 with fasteners. The fasteners can be in various forms, such as bolts, screws, etc., which are not described one by one and are within the protection scope of the present application.

[0100] In one embodiment, referring to the drawings of the specification Figures 4 to 8The air pipeline further comprises an air inlet ring cavity 1110, an air outer transition ring cavity 1210, an air inner transition ring cavity 1220, a preheated air ring cavity 1310, an air injection pipeline 2400, and a preheated air flow uniformizing chamber 1320.

[0101] In the embodiment, the air inlet ring cavity 1110, the outer air pipeline 2100, the air outer transition ring cavity 1210, the air transition pipeline 2200, the air inner transition ring cavity 1220, the inner air pipeline 2300, the preheated air ring cavity 1310, the preheated air flow uniformizing chamber 1320, and the air injection pipeline 2400 are sequentially communicated.

[0102] Notably, the air inlet ring cavity 1110 is communicated with one end of the outer air pipeline 2100, and the air inlet ring cavity 1110 is provided with an opening communicated with the external environment, so that external air can be evenly distributed into the air inlet ring cavity 1110 and then into the plurality of outer air pipelines 2100 through the opening. Two ends of the plurality of air transition pipelines 2200 are respectively communicated with the air outer transition ring cavity 1210 and the air inner transition ring cavity 1220, two ends of the plurality of inner air pipelines 2300 are respectively communicated with the air inner transition ring cavity 1220 and the preheated air ring cavity 1310, and the preheated air ring cavity 1310 is communicated with the preheated air flow uniformizing chamber 1320.

[0103] Further, the preheated air flow uniformizing chamber 1320 is communicated with one end of the air injection pipeline 2400, the other end of the air injection pipeline 2400 is communicated with the combustion chamber 6000, and air can enter the combustion chamber 6000 through the air injection pipeline 2400.

[0104] In one embodiment, referring to the accompanying drawings Figures 1 to 8 The exhaust pipeline further comprises an exhaust inner transition ring cavity 1250, an exhaust outer transition ring cavity 1260, and an exhaust outlet ring cavity 1160.

[0105] One end of the inner exhaust pipeline 3300 is communicated with the combustion chamber 6000, and the other end is communicated with the exhaust inner transition ring cavity 1250. Two ends of the exhaust transition pipeline 3200 are respectively communicated with the exhaust inner transition ring cavity 1250 and the exhaust outer transition ring cavity 1260, then the exhaust outer transition ring cavity 1260 is further communicated with one end of the outer exhaust pipeline 3100, the other end of the outer exhaust pipeline 3100 is communicated with the exhaust outlet ring cavity 1160, and the exhaust outlet ring cavity 1160 is communicated with the external environment.

[0106] In the embodiment, the exhaust gas generated by the combustion in the combustion chamber 6000 enters the inner exhaust gas transition ring cavity 1250 through the inner exhaust gas pipeline 3300, and then is evenly distributed into the exhaust gas transition pipelines 3200, and then is evenly distributed into the outer exhaust gas transition ring cavity 1260, and then enters the outer exhaust gas pipelines 3100, and then enters the exhaust gas outlet ring cavity 1160, and finally is discharged out of the preheater body 1000.

[0107] In one embodiment, referring to the drawings Figures 4 to 7 , the cooling water pipeline further comprises an outer cooling water inlet ring cavity 1120, a cooling water outlet ring cavity 1130, an inner cooling water inlet ring cavity 1140, an inner cooling water inner-outer connection ring cavity 1230, an inner cooling water inner side inlet transition ring cavity 1330, an inner cooling water inner side outlet transition ring cavity 1270, and an inner cooling water outer side transition ring cavity 1240.

[0108] Specifically, referring to the drawings Figures 5 to 7 , the outer cooling water inlet ring cavity 1120 is in communication with one end of the outer cooling water pipeline 4100, and the other end of the cooling water pipeline is in communication with the cooling water outlet ring cavity 1130. It is worth noting that the outer cooling water inlet ring cavity 1120 and the cooling water outlet ring cavity 1130 are in communication with the external environment, and are respectively used for introducing cooling water and discharging cooling water.

[0109] Further, the inner cooling water inlet ring cavity 1140, the inner cooling water connection pipeline 4200, the inner cooling water inner-outer connection ring cavity 1230, the inner cooling water transition pipeline 4300, the inner cooling water inner side inlet transition ring cavity 1330, the inner cooling water pipeline 4400, the inner cooling water inner side outlet transition ring cavity 1270, the inner cooling water outlet transition pipeline 4500, the inner cooling water outer side transition ring cavity 1240, and the outer cooling water pipeline 4100 are sequentially communicated.

[0110] In one embodiment, referring to the drawings Figures 1 to 7 , the condensate pipeline further comprises a condensate ring cavity 1170. Among them, the bottom of the outer exhaust gas pipeline 3100 is in communication with one end of the condensate pipeline, the other end of the condensate pipeline is in communication with the condensate ring cavity 1170, and the condensate ring cavity 1170 is in communication with the external environment. The condensate generated after the heat exchange between the exhaust gas and the cooling water flows into the condensate pipeline from the bottom of the outer exhaust gas pipeline 3100, and then enters the condensate ring cavity 1170 and is discharged out of the preheater body 1000.

[0111] In one embodiment, referring to the drawings Figures 1 to 8 , the oxygen pipeline 5100 further comprises an oxygen inlet ring cavity 1150 and an oxygen inner side ring cavity 1340.

[0112] Further, the oxygen inlet ring cavity 1150 is connected with the external oxygen input pipeline and communicates with one end of the oxygen pipeline 5100. Correspondingly, the other end of the oxygen pipeline 5100 communicates with the oxygen inner ring cavity 1340. Then, one end of the oxygen nozzle pipeline 5200 communicates with the oxygen inner ring cavity 1340, and the other end is connected with the oxygen nozzle 5300, and the oxygen nozzle 5300 communicates with the combustion chamber 6000.

[0113] In the embodiment, the external oxygen passes through the oxygen inlet ring cavity 1150, the oxygen pipeline, the oxygen inner ring cavity 1340, the oxygen nozzle pipeline 5200 and the oxygen nozzle 5300 in sequence, and finally enters the combustion chamber 6000 to participate in combustion.

[0114] In one embodiment, referring to the drawings Figures 1 to 7 , the inner layer air pipeline 2300 and the inner layer tail gas pipeline 3300 are arranged alternately along the circumferential direction of the combustion chamber 6000. The tail gas generated by the combustion chamber 6000 during operation enters the inner layer tail gas pipeline 3300, and the air in the external environment moves into the inner layer air pipeline 2300. The inner layer air pipeline 2300 and the inner layer tail gas pipeline 3300 are arranged alternately, so that the heat of the tail gas can be transferred to the air in the adjacent inner layer air pipeline 2300, the temperature of the air is increased, and the working efficiency of the engine is enhanced.

[0115] Further, the outer layer cooling water pipeline 4100 and the outer layer tail gas pipeline 3100 are arranged alternately along the circumferential direction of the combustion chamber 6000. The cooling water in the outer layer cooling water pipeline 4100 exchanges heat with the tail gas in the adjacent outer layer tail gas pipeline 3100, and the heat of the tail gas is transferred to the cooling water, so that the tail gas can be discharged at a safe temperature.

[0116] Further, the inner layer cooling water pipeline 4400 and the inner layer tail gas pipeline 3300 are arranged alternately along the circumferential direction of the combustion chamber 6000, for heat exchange between the cooling water and the tail gas in the pure oxygen combustion mode.

[0117] In one embodiment, referring to the drawings Figure 8 , the inner diameter of the oxygen nozzle 5300 is smaller than the inner diameter of the oxygen nozzle pipeline 5200. When the oxygen enters the oxygen nozzle 5300 from the oxygen nozzle pipeline 5200, the oxygen can obtain a larger ejection speed, which is convenient for full combustion of the fuel.

[0118] In one embodiment, referring to the drawings Figures 1 to 7 , the air inner transition ring cavity 1220 accounts for about 1 / 3 of the total height of the preheater body 1000. The air inner transition ring cavity 1220 can separate the inner and outer regions and reduce the heat dissipation of the combustion chamber 6000 to the outside.

[0119] In one embodiment, the present embodiment provides a method for implementing the above-mentioned dual-mode Stirling engine with a preheater, comprising the following steps:

[0120] In the air combustion mode, the cooling water is circulated in the cooling water pipeline, and the air from the external environment is heated by the exhaust gas in the air pipeline and the exhaust gas pipeline, and then enters the combustion chamber 6000 to participate in combustion. The exhaust gas generated by the combustion chamber 6000 is heated by the air in the air pipeline and the cooling water in the cooling water pipeline, and then discharged outside the preheater body 1000. The condensed water generated after the exhaust gas is heated is discharged outside the preheater body 1000 through the condensed water pipeline.

[0121] In the oxygen combustion mode, the cooling water is circulated in the cooling water pipeline, and the oxygen from the external environment enters the combustion chamber 6000 through the oxygen pipeline 5100 to participate in combustion. The exhaust gas generated by the combustion chamber 6000 is heated by the cooling water in the cooling water pipeline, and then discharged outside the preheater body 1000. The condensed water generated after the exhaust gas is heated is discharged outside the preheater body 1000 through the condensed water pipeline.

[0122] Specifically, in the air combustion mode, the oxygen pipeline 5100 and the inner cooling water pipeline 4400 do not participate in the operation of the dual-mode Stirling engine. The air from the external environment enters the air inlet ring cavity 1110, and then sequentially passes through the air outside transition ring cavity 1210, the outer air pipeline 2100, the air transition pipeline 2200, the air inside transition ring cavity 1220, and the inner air pipeline 2300. At the same time, the exhaust gas generated by the operation of the combustion chamber 6000 enters the inner exhaust gas pipeline 3300. The air in the inner air pipeline 2300 is heated by the exhaust gas in the inner exhaust gas pipeline 3300, and then sequentially passes through the preheated air ring cavity 1310, the preheated air flow chamber 1320, and the air injection pipeline 2400, and finally enters the combustion chamber 6000 to participate in combustion. Correspondingly, the exhaust gas sequentially passes through the inner exhaust gas pipeline 3300, the exhaust gas inside transition ring cavity 1250, the exhaust gas transition pipeline 3200, the exhaust gas outside transition ring cavity 1260, and the outer exhaust gas pipeline 3100. At the same time, the cooling water sequentially enters the outer cooling water inlet ring cavity 1120 and the outer cooling water pipeline 4100. The exhaust gas in the outer exhaust gas pipeline 3100 is heated by the cooling water in the outer cooling water pipeline 4100, and then enters the exhaust gas outlet ring cavity 1160 and is finally discharged. After the cooling water flows out of the outer cooling water pipeline 4100, it enters the cooling water outlet ring cavity 1130 and is finally discharged. The condensed water generated when the exhaust gas in the outer exhaust gas pipeline 3100 is heated by the cooling water in the outer cooling water pipeline 4100 flows to the bottom of the outer exhaust gas pipeline 3100, and then sequentially passes through the condensed water pipeline and the condensed water ring cavity 1170 and is finally discharged.

[0123] In the pure oxygen combustion mode, the air pipe does not participate in the work of the dual-mode Stirling engine. The oxygen in the external oxygen input pipe enters the oxygen inlet ring cavity 1150, the oxygen pipe 5100, the air inner ring cavity, the oxygen nozzle pipe 5200 in turn, and finally enters the combustion chamber 6000 through the oxygen nozzle 5300 to participate in combustion. The exhaust gas generated by the work of the combustion chamber 6000 enters the inner exhaust pipe 3300.

[0124] At the same time, the cooling water enters the inner cooling water inlet ring cavity 1140, the inner cooling water connecting pipe 4200, the inner cooling water inner-outer connecting ring cavity 1230, the inner cooling water transition pipe 4300, the inner cooling water inner side inlet transition ring cavity 1330 and the inner cooling water pipe 4400 in turn. The exhaust gas in the inner exhaust pipe 3300 exchanges heat with the cooling water in the inner cooling water pipe 4400, and then enters the exhaust gas inner side transition ring cavity 1250, the exhaust gas transition pipe 3200, the exhaust gas outer side transition ring cavity 1260 and the outer exhaust pipe 3100 in turn. The exhaust gas exchanges heat and then enters the exhaust gas exhaust ring cavity 1160 and is finally discharged.

[0125] The cooling water in the inner cooling water pipe 4400 flows out of the inner cooling water pipe 4400 and enters the inner cooling water inner side outlet transition ring cavity 1270, the inner cooling water outlet transition pipe 4500, the inner cooling water outer side transition ring cavity 1240 and the inner cooling water merging pipe 4600 in turn. The cooling water flows out of the inner cooling water merging pipe 4600 and enters the outer cooling water pipe 4100, mixes and then enters the cooling water outlet ring cavity 1130 and is finally discharged. When the exhaust gas in the outer exhaust pipe 3100 exchanges heat with the cooling water in the outer cooling water pipe 4100, the condensed water generated flows to the bottom of the outer exhaust pipe 3100, and then passes through the condensed water pipe and the condensed water ring cavity 1170 in turn and is finally discharged.

[0126] It should be noted that the above embodiments can be freely combined as needed. The above description is only the preferred embodiments of the present application, and it should be noted that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A dual-mode Stirling engine with a preheater, characterized in that, include, The combustion chamber has an air combustion mode and a pure oxygen combustion mode; The preheater body is arranged outside the combustion chamber. The preheater body integrates a variety of pipelines inside the combustion chamber. The various pipelines are arranged around the circumference of the combustion chamber and include air pipelines, oxygen pipelines, exhaust gas pipelines, cooling water pipelines, and condensate pipelines. In air combustion mode, the exhaust gas in the exhaust gas pipeline preheats the air in the air pipeline, so that the preheated air enters the combustion chamber for combustion. The exhaust gas in the exhaust gas pipeline also exchanges heat with the cooling water in the cooling water pipeline. In pure oxygen combustion mode, oxygen in the oxygen pipeline enters the combustion chamber for combustion, and cooling water in the cooling water pipeline exchanges heat with exhaust gas in the exhaust gas pipeline. The condensate pipe is used to discharge condensate from the preheater body; The preheater body is divided into an inner heat exchange zone, an inner-outer transition zone, and an outer heat exchange zone, which are sequentially nested around the combustion chamber.

2. A dual-mode Stirling engine with a preheater according to claim 1, characterized in that, The air pipeline is configured as a plurality of lines, with one end of each air pipeline located on the preheater body and connected to the external environment, and the other end connected to the interior of the combustion chamber, for the purpose of inputting outside air into the combustion chamber; The oxygen pipeline is configured as several lines, with one end of each oxygen pipeline located on the preheater body and the other end connected to the interior of the combustion chamber for inputting oxygen into the combustion chamber. The exhaust gas pipeline is configured as several pipelines, with one end of each pipeline connected to the interior of the combustion chamber and the other end located on the preheater body for exhausting exhaust gas. The cooling water pipeline is configured as a plurality of pipelines, which are arranged in the preheater body, and both ends of the cooling water pipelines are arranged on the preheater body. One end of the condensate pipe is connected to the exhaust gas pipe, and the other end is located on the preheater body for collecting and discharging condensate.

3. A dual-mode Stirling engine with a preheater according to claim 1 or 2, characterized in that, The air duct includes an outer air duct, an air transition duct, an inner air duct, and an air nozzle duct, and they are interconnected. and / or The exhaust gas pipeline includes an outer exhaust gas pipeline, an exhaust gas transition pipeline, and an inner exhaust gas pipeline, which are interconnected. and / or The cooling water pipeline includes an outer cooling water pipeline, an inner cooling water connecting pipeline, an inner cooling water transition pipeline, an inner cooling water pipeline, an inner cooling water outlet transition pipeline, and an inner cooling water merging pipeline, and they are interconnected. and / or The oxygen pipeline is also connected to an oxygen nozzle pipeline.

4. A dual-mode Stirling engine with a preheater according to claim 3, characterized in that, The inner and outer transition zone has multiple mounting holes that penetrate the preheater body and are arranged in a circular pattern for connecting and fixing external devices. The inner cooling water connection pipe, air transition pipe, exhaust gas transition pipe, and inner cooling water outlet transition pipe are arranged through the interval area of ​​the mounting hole, and the number of the inner cooling water connection pipe, air transition pipe, exhaust gas transition pipe, and inner cooling water outlet transition pipe is less than the number of adjacent pipes.

5. A dual-mode Stirling engine with a preheater according to claim 4, characterized in that, The air pipeline also includes an air inlet annular cavity, an outer air transition annular cavity, an inner air transition annular cavity, a preheated air annular cavity, and a preheated air equalization chamber. The air inlet annular cavity is located at one end of the outer air duct, and the air inlet annular cavity is in communication with the external environment; The outer air transition annular cavity is connected to the other end of the outer air duct and to one end of the air transition duct; The other end of the air transition pipe is connected to the inner air transition ring cavity, and the inner air transition ring cavity is connected to one end of the inner air pipe. The other end of the inner air duct is connected to a preheated air annular cavity, which is connected to the preheated air equalization chamber. The preheated air equalization chamber is connected to one end of the air nozzle duct, and the other end of the air nozzle duct is connected to the combustion chamber.

6. A dual-mode Stirling engine with a preheater according to claim 5, characterized in that, The exhaust gas pipeline also includes an inner transition annular cavity for exhaust gas, an outer transition annular cavity for exhaust gas, and an exhaust gas outlet annular cavity. One end of the inner exhaust gas pipeline is connected to the combustion chamber, and the other end is connected to the inner transition ring cavity of the exhaust gas, and the inner transition ring cavity of the exhaust gas is connected to one end of the exhaust gas transition pipeline. The other end of the exhaust gas transition pipe is connected to the outer transition ring cavity of the exhaust gas, and the outer transition ring cavity of the exhaust gas is connected to one end of the outer exhaust gas pipe, and the other end of the outer exhaust gas pipe is connected to the exhaust gas outlet ring cavity. The exhaust outlet annular cavity is connected to the external environment.

7. A dual-mode Stirling engine with a preheater according to claim 6, characterized in that, The cooling water pipeline also includes an outer cooling water inlet annular cavity, a cooling water outlet annular cavity, an inner cooling water inlet annular cavity, an inner and outer connecting annular cavity for the inner cooling water, an inner inlet transition annular cavity for the inner cooling water, an inner outlet transition annular cavity for the inner cooling water, and an outer transition annular cavity for the inner cooling water. The outer cooling water inlet annular cavity is connected to the external environment and is connected to one end of the outer cooling water pipeline. The other end of the outer cooling water pipeline is connected to the cooling water outlet annular cavity, which is also connected to the external environment. The inner cooling water inlet annular cavity is connected to the external environment and to one end of the inner cooling water connecting pipe, and the other end of the inner cooling water connecting pipe is connected to the inner and outer connecting annular cavity of the inner cooling water. The inner layer cooling water inner and outer connecting ring cavity is connected to one end of the inner layer cooling water transition pipe, the other end of the inner layer cooling water transition pipe is connected to the inner inlet transition ring cavity of the inner layer cooling water, and the inner inlet transition ring cavity of the inner layer cooling water is connected to one end of the inner layer cooling water pipe, and the other end of the inner layer cooling water pipe is connected to the inner outlet transition ring cavity of the inner layer cooling water. The inner layer cooling water inner outlet transition ring cavity is connected to one end of the inner layer cooling water outlet transition pipe, the other end of the inner layer cooling water outlet transition pipe is connected to the inner layer cooling water outer transition ring cavity, and the inner layer cooling water outer transition ring cavity is connected to one end of the inner layer cooling water merging pipe, and the other end of the inner layer cooling water merging pipe is connected to the outer layer cooling water pipe.

8. A dual-mode Stirling engine with a preheater according to claim 7, characterized in that, The condensate pipeline also includes a condensate ring cavity; One end of the condensate pipe is connected to the bottom of the outer exhaust pipe, and the other end is connected to the condensate ring cavity, which is connected to the external environment.

9. A dual-mode Stirling engine with a preheater according to claim 8, characterized in that, The oxygen pipeline also includes an oxygen inlet annular cavity and an oxygen inner annular cavity; The oxygen inlet annular cavity is connected to an external oxygen pipeline and is connected to one end of the oxygen pipeline, while the other end of the oxygen pipeline is connected to an inner oxygen annular cavity. The oxygen inner annular cavity is connected to one end of the oxygen nozzle pipeline, and the other end of the oxygen nozzle pipeline is connected to an oxygen nozzle.

10. A dual-mode Stirling engine with a preheater according to any one of claims 3-9, characterized in that, The inner air duct and the inner exhaust duct are arranged alternately in a circular pattern to achieve heat exchange between the air and the exhaust gas. The outer cooling water pipeline and the outer exhaust gas pipeline are arranged alternately in a circle to facilitate heat exchange between the cooling water and the exhaust gas, so that the exhaust gas reaches a safe temperature. The inner cooling water pipeline and the inner exhaust gas pipeline are arranged alternately in a circle for heat exchange between cooling water and exhaust gas in pure oxygen closed combustion mode.

11. A dual-mode Stirling engine with a preheater according to claim 9, characterized in that, The inner diameter of the oxygen nozzle is smaller than the diameter of the oxygen nozzle pipeline, which is used to increase the flow rate of oxygen ejected from the oxygen nozzle.

12. A dual-mode Stirling engine with a preheater according to claim 5, characterized in that, The height of the inner air transition annular cavity accounts for 1 / 3 of the total height of the preheater body.

13. An implementation method, characterized in that: A method for implementing a dual-mode Stirling engine with a preheater according to any one of claims 1-12 includes the following steps: In air combustion mode, cooling water is introduced into the cooling water pipeline to participate in circulation, and air from the outside environment enters the combustion chamber to participate in combustion after exchanging heat with the exhaust gas in the exhaust gas pipeline through the air pipeline. The exhaust gas generated in the combustion chamber is discharged to the preheater body after exchanging heat with the air in the air pipeline and the cooling water in the cooling water pipeline through the exhaust gas pipeline. The condensate generated after the exhaust gas heat exchange is discharged to the preheater body through the condensate pipeline. In oxygen combustion mode, cooling water is introduced into the cooling water pipeline to participate in circulation, and oxygen from the external environment enters the combustion chamber through the oxygen pipeline to participate in combustion. The exhaust gas generated in the combustion chamber is discharged from the preheater body after exchanging heat with the cooling water in the cooling water pipeline. The condensate generated after the exhaust gas heat exchange is discharged from the preheater body through the condensate pipeline.

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