阅读说明：本技术 温差发电系统及温差发电方法 (Thermoelectric power generation system and thermoelectric power generation method ) 是由 陈光进 董保灿 孙长宇 邓春 阚京玉 于 2019-11-08 设计创作，主要内容包括：本申请提供了一种温差发电系统及温差发电方法,其中,该系统包括：水合物生成装置,用于生成水合物；水合物解离装置,与水合物生成装置相连,以获取水合物生成装置生成的水合物,并对获得的水合物进行解离,生成气体和水；气体脱水装置,与水合物解离装置相连,以获取水合物解离装置生成的气体,并对获得的气体进行脱水；膨胀发电装置,与气体脱水装置相连,以获取气体脱水装置脱水后的气体,并对脱水后的气体进行膨胀降压,以将脱水后的气体的内能转化为电能。上述方案可以对海底与海平面天然的巨大温差进行转化利用,在有效降低自用电率的同时,能够大幅度地利用自然能量,提高发电稳定性和能力,节约资源和成本。(The application provides a thermoelectric generation system and a thermoelectric generation method, wherein, the system comprises: hydrate generating means for generating a hydrate; the hydrate dissociation device is connected with the hydrate generation device to obtain the hydrate generated by the hydrate generation device and dissociate the obtained hydrate to generate gas and water; the gas dehydration device is connected with the hydrate dissociation device to obtain gas generated by the hydrate dissociation device and dehydrate the obtained gas; and the expansion power generation device is connected with the gas dehydration device to obtain the gas dehydrated by the gas dehydration device, and the dehydrated gas is expanded and depressurized to convert the internal energy of the dehydrated gas into electric energy. The scheme can convert and utilize natural huge temperature difference between the sea bottom and the sea level, effectively reduce the self-power utilization rate, greatly utilize natural energy, improve the power generation stability and capacity and save resources and cost.)

1. A thermoelectric power generation system, comprising:

hydrate generating means for generating a hydrate;

the hydrate dissociation device is connected with the hydrate generation device to obtain the hydrate generated by the hydrate generation device and dissociate the obtained hydrate to generate gas and water;

the gas dehydration device is connected with the hydrate dissociation device so as to obtain the gas generated by the hydrate dissociation device and dehydrate the obtained gas;

and the expansion power generation device is connected with the gas dehydration device to obtain the gas dehydrated by the gas dehydration device, and the dehydrated gas is expanded and depressurized to convert the internal energy of the dehydrated gas into electric energy.

2. The system of claim 1, wherein the hydrate formation device is connected to the hydrate dissociation device to obtain water produced by the hydrate dissociation device; and/or

And the hydrate generating device is connected with the expansion generating device to obtain the gas expanded and depressurized by the expansion generating device.

3. The system of claim 2, wherein the hydrate dissociation device is connected to the hydrate generation device via a first pump to extract hydrate generated in the hydrate generation device by the first pump.

4. The system of claim 3, wherein the hydrate generating device comprises: the device comprises a hydrate generation kettle, a gas source, a heat exchange layer, a second pump, a cold water source, a condenser and a nozzle; wherein the content of the first and second substances,

the hydrate generating kettle is provided with a first air inlet, a first water inlet and a discharge hole; the gas source is connected with the first gas inlet through the nozzle so as to supplement gas required for generating the hydrate into the hydrate generating kettle through the nozzle through the first gas inlet, and the first gas inlet is also connected with the expansion power generation device through the nozzle so as to obtain the gas expanded and depressurized by the expansion power generation device; the first water inlet is connected with the hydrate dissociation device through the condenser, so that water generated in the hydrate dissociation device enters the hydrate generation kettle after being condensed by the condenser; the discharge port is connected with the hydrate dissociation device through the first pump so as to provide the hydrate dissociation device with the generated hydrate;

the heat exchange layer is arranged on the periphery of the hydrate generation kettle and is provided with a second water inlet and a first water outlet, the second water inlet is connected with the cold water source through the second pump so as to pump cold water in the cold water source into the heat exchange layer through the second pump, and the first water outlet is used for discharging water in the heat exchange layer;

the condenser is connected with the cold water source through the second pump, so that cold water in the cold water source is pumped into the condenser through the second pump.

5. The system of claim 4, wherein the hydrate dissociation device comprises a hydrate dissociation kettle, wherein the hydrate dissociation kettle is provided with a feed inlet, a first gas outlet and a second water outlet, the feed inlet is connected with the discharge outlet of the hydrate generation kettle through the first pump, the first gas outlet is connected with the gas dehydration device so as to release gas generated by dissociation into the gas dehydration device, and the second water outlet is connected with the first water inlet of the hydrate generation kettle through the condenser.

6. The system of claim 5, wherein the gas dehydration means comprises a gas dehydration tank provided with a second gas inlet and a second gas outlet;

the second gas inlet is connected with the first gas outlet of the hydrate dissociation kettle, and the second gas outlet of the gas dehydration tank is connected with the expansion power generation device.

7. The system of claim 6, wherein the expansion power generation device comprises a turbine generator provided with a third gas inlet connected to the second gas outlet of the gas dehydration tank and a third gas outlet connected to the first gas inlet of the hydrate formation tank via the nozzle.

8. The system of claim 1, wherein the gas comprises at least one of: methane, ethane, propane, carbon dioxide and nitrogen.

9. The system of claim 5, wherein the hydrate dissociation device is located at sea level, the hydrate dissociation device further comprising a pipeline, the hydrate dissociation vessel further being provided with first and second opposing openings, the pipeline passing through the hydrate dissociation vessel via the first and second openings, the pipeline being for passing seawater at sea level; and/or

The source of cold water comprises subsea cold water.

10. A thermoelectric power generation method based on the thermoelectric power generation system according to any one of claims 1 to 9, characterized by comprising:

generating a hydrate by a hydrate generating device;

acquiring hydrate generated in the hydrate generating device through a hydrate dissociation device, dissociating the acquired hydrate to generate gas and water, and releasing the generated gas to the gas dehydration device;

dehydrating the gas by the gas dehydration device, and releasing the dehydrated gas to an expansion power generation device;

and expanding and depressurizing the dehydrated gas through the expansion power generation device so as to convert the internal energy of the dehydrated gas into electric energy.

Technical Field

The application relates to the technical field of power generation, in particular to a temperature difference power generation system and a temperature difference power generation method.

Background

At present, electric energy is mainly obtained by thermal power generation and hydroelectric power generation. However, thermal power generation requires combustion of fossil fuels, generates a large amount of greenhouse gases, and causes greenhouse effect, acid rain, and other environmental problems; hydroelectric power generation requires the construction of dams, which can damage the environment and surrounding ecosystem. In recent years, with the development of new energy technologies, technologies of tidal power generation, solar power generation and wind power generation are becoming mature.

In the offshore environment, tidal energy and wind energy gradually become the primary new energy targets, and the natural huge temperature difference between the sea bottom and the sea surface is a potential huge energy. In addition, with the exhaustion of oil and gas resources, natural gas hydrates also enter the scope of people by virtue of the characteristics of wide distribution range, large scale, high energy density and the like.

Therefore, there is a need for a power generation system and method that can utilize temperature differentials and natural gas hydrates for power generation.

Disclosure of Invention

The embodiment of the application provides a temperature difference power generation system and a temperature difference power generation method, which can utilize temperature difference and natural gas hydrate to generate power.

The embodiment of the application provides a thermoelectric generation system, includes: hydrate generating means for generating a hydrate; the hydrate dissociation device is connected with the hydrate generation device to obtain the hydrate generated by the hydrate generation device and dissociate the obtained hydrate to generate gas and water; the gas dehydration device is connected with the hydrate dissociation device to obtain gas generated by the hydrate dissociation device and dehydrate the obtained gas; and the expansion power generation device is connected with the gas dehydration device to obtain the gas dehydrated by the gas dehydration device, and the dehydrated gas is expanded and depressurized to convert the internal energy of the dehydrated gas into electric energy.

In one embodiment, the hydrate generating device is connected with the hydrate dissociation device to obtain water generated by the hydrate dissociation device; and/or the hydrate generating device is connected with the expansion generating device to obtain the gas expanded and depressurized by the expansion generating device.

In one embodiment, the hydrate dissociation device is connected to the hydrate generation device via a first pump to extract the hydrate generated in the hydrate generation device by the first pump.

In one embodiment, a hydrate generating apparatus comprises: the device comprises a hydrate generation kettle, a gas source, a heat exchange layer, a second pump, a cold water source, a condenser and a nozzle; the hydrate generating kettle is provided with a first air inlet, a first water inlet and a discharge hole; the gas source is connected with the first gas inlet through the nozzle so as to supplement gas required for generating the hydrate into the hydrate generating kettle through the nozzle through the first gas inlet, and the first gas inlet is also connected with the expansion power generation device through the nozzle so as to obtain the gas expanded and depressurized by the expansion power generation device; the first water inlet is connected with the hydrate dissociation device through the condenser, so that water generated in the hydrate dissociation device enters the hydrate generation kettle after being condensed by the condenser; the discharge port is connected with the hydrate dissociation device through a first pump so as to provide generated hydrate for the hydrate dissociation device; the heat exchange layer is arranged at the periphery of the hydrate generation kettle and is provided with a second water inlet and a first water outlet, the second water inlet is connected with a cold water source through a second pump so as to pump cold water in the cold water source into the heat exchange layer through the second pump, and the first water outlet is used for discharging water in the heat exchange layer; the condenser is connected with the cold water source through a second pump, and cold water in the cold water source is pumped into the condenser through the second pump.

In one embodiment, the hydrate dissociation device comprises a hydrate dissociation kettle, wherein the hydrate dissociation kettle is provided with a feed inlet, a first gas outlet and a second water outlet, the feed inlet is connected with the discharge outlet of the hydrate generation kettle through a first pump, the first gas outlet is connected with the gas dehydration device so as to release gas generated by dissociation into the gas dehydration device, and the second water outlet is connected with the first water inlet of the hydrate generation kettle through a condenser.

In one embodiment, the gas dewatering apparatus comprises a gas dewatering tank provided with a second gas inlet and a second gas outlet; the second gas inlet is connected with the first gas outlet of the hydrate dissociation kettle, and the second gas outlet of the gas dehydration tank is connected with the expansion power generation device.

In one embodiment, the expansion power generation device comprises a turbine generator, the turbine generator is provided with a third air inlet and a third air outlet, the third air inlet is connected with the second air outlet of the gas dehydration tank, and the third air outlet of the turbine generator is connected with the first air inlet of the hydrate generation kettle through a nozzle.

In one embodiment, the gas comprises at least one of: methane, ethane, propane, carbon dioxide and nitrogen.

In one embodiment, the hydrate dissociation device is located at sea level, the hydrate dissociation device further comprises a pipeline, the hydrate dissociation kettle is further provided with a first opening and a second opening which are opposite, the pipeline penetrates through the hydrate dissociation kettle through the first opening and the second opening, and the pipeline is used for circulating seawater at sea level; and/or the cold water source comprises subsea cold water.

The embodiment of the present application further provides a thermoelectric generation method based on the thermoelectric generation system in the above embodiment, including: generating a hydrate by a hydrate generating device; acquiring hydrate generated in a hydrate generating device through a hydrate dissociation device, dissociating the acquired hydrate to generate gas and water, and releasing the generated gas to a gas dehydration device; dehydrating the gas through a gas dehydration device, and releasing the dehydrated gas to an expansion power generation device; and expanding and depressurizing the dehydrated gas through an expansion power generation device so as to convert the internal energy of the dehydrated gas into electric energy.

In an embodiment of the present application, a thermoelectric generation system is provided, wherein a hydrate generating device generates a hydrate, a hydrate dissociation device is connected to the hydrate generating device to obtain the hydrate generated by the hydrate generating device and dissociate the obtained hydrate to generate gas and water, a gas dehydration device is connected to the hydrate dissociation device to obtain the gas generated by the hydrate dissociation device and dehydrate the obtained gas, and an expansion power generation device is connected to the gas dehydration device to obtain the dehydrated gas from the gas dehydration device and expand and reduce the pressure of the dehydrated gas to convert the internal energy of the dehydrated gas into electric energy. According to the scheme, the hydrate is generated at a low temperature by the hydrate generation device, the hydrate is dissociated at a high temperature by the hydrate dissociation device to generate high-pressure gas and water, the generated high-pressure gas is dehydrated by the gas dehydration device, and the dehydrated high-pressure gas is expanded and depressurized by the expansion power generation device so as to convert the internal energy of the dehydrated high-pressure gas into electric energy, so that power generation is realized by using temperature difference and the hydrate, fossil fuel is not required to be combusted, a dam is not required to be built, the cost can be saved, and the environment is protected. Furthermore, the natural huge temperature difference between the sea bottom and the sea level is combined with the hydrate to generate electricity, the natural huge temperature difference between the sea bottom and the sea level can be converted and utilized, the self-electricity utilization rate is effectively reduced, meanwhile, the natural energy can be greatly utilized, the electricity generation stability and capacity are improved, and the resources and the cost are saved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application, are incorporated in and constitute a part of this application, and are not intended to limit the application. In the drawings:

FIG. 1 shows a schematic view of a thermoelectric generation system in an embodiment of the present application.

FIG. 2 illustrates a flow diagram of a thermoelectric generation system in an embodiment of the present application;

fig. 3 shows a flow chart of a thermoelectric generation method in an embodiment of the present application.

Description of reference numerals:

10. a thermoelectric power generation system; 100. a hydrate generating device; 200. a hydrate dissociation device; 300. a gas dehydration unit; 400. an expansion power generation device; 210. a first pump; 110. a hydrate generating kettle; 120. a gas source; 130. a heat exchange layer; 140. a second pump; 150. a source of cold water; 160. a condenser; 170. a nozzle; 111. a first air inlet; 112. a first water inlet; 113. a discharge port; 131. a second water inlet; 132. a first water outlet; 220. a hydrate dissociation kettle; 221. a feed inlet; 222. a first air outlet; 223. a second water outlet; 224. a pipeline; 225. a first opening; 226. a second opening; 310. a gas dehydration tank; 311. a second air inlet; 312. a second air outlet; 410. a turbine generator; 411. a third air inlet; 412. and a third air outlet.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The embodiment of the application provides a thermoelectric generation system, and fig. 1 shows a schematic structural diagram of the thermoelectric generation system provided in the embodiment of the application. As shown in fig. 1, the thermoelectric generation system 10 may include: a hydrate generating apparatus 100, a hydrate dissociation apparatus 200, a gas dehydration apparatus 300, and an expansion power generation apparatus 400.

The hydrate forming apparatus 100 is used for forming a hydrate. Wherein, the gas and water can generate hydrate under the conditions of low temperature and high pressure. Wherein the gas may comprise at least one of: methane, ethane, propane, carbon dioxide and nitrogen. For example, the gas may comprise only methane. For example, the gas may also include methane and ethane, with methane being the predominant component. For example, the hydrate may be natural gas hydrate, i.e. a hydrate of methane with water.

The hydrate dissociation device 200 is connected to the hydrate formation device 100, and can obtain the hydrate formed by the hydrate formation device 100. The hydrate dissociation device 200 dissociates the obtained hydrate to generate gas and water. Specifically, hydrates can dissociate under high temperature conditions, generating high pressure gas and water.

The gas dehydration unit 300 is connected to the hydrate dissociation unit 200, and can extract the gas generated by the hydrate dissociation unit 200 and dehydrate the extracted gas. The gas dehydration device 300 may dehydrate the gas generated in the hydrate dissociation device by using various known dehydration methods, which is not limited in the present application.

The expansion power generation device 400 is connected to the gas dehydration device 300 to obtain the gas dehydrated by the gas dehydration device 300, and expands and reduces the pressure of the dehydrated gas to convert the internal energy of the dehydrated gas into electric energy. Specifically, when the expansion power generation device expands and reduces the pressure of the gas, work Ws is applied to the outside, and after the power is output, the power generation device drives a generator to generate power, so that conversion from internal energy to electric energy is realized.

According to the scheme, the hydrate is generated at a low temperature by the hydrate generation device, the hydrate is dissociated at a high temperature by the hydrate dissociation device to generate high-pressure gas and water, the generated high-pressure gas is dehydrated by the gas dehydration device, and the dehydrated high-pressure gas is expanded and depressurized by the expansion power generation device so as to convert the internal energy of the dehydrated high-pressure gas into electric energy, so that power generation is realized by using temperature difference and the hydrate, fossil fuel is not required to be combusted, a dam is not required to be built, the cost can be saved, and the environment is protected. Furthermore, the power generation is carried out by combining the natural huge temperature difference between the sea bottom and the sea level with the hydrate, the natural huge temperature difference between the sea bottom and the sea level can be converted and utilized, the self-power utilization rate is effectively reduced, meanwhile, the natural energy can be greatly utilized, the power generation stability and power generation capacity are improved, the power generation device has good social and economic benefits, and the industrial application and popularization potential is huge.

In some embodiments of the present application, as shown in fig. 1, the hydrate formation apparatus 100 is connected to a hydrate dissociation apparatus 200 to obtain water produced by the hydrate dissociation apparatus 200. Through the mode, in the temperature difference power generation system, the liquid circulation channel is formed, so that water generated by the hydrate dissociation device 200 can enter the hydrate generation device 100 to participate in the generation of hydrates, the water can be recycled, water resources can be saved, and the power generation cost is reduced.

In some embodiments of the present application, as shown in fig. 1, the hydrate formation plant 100 is connected to an expansion power plant 400 to obtain gas that is expanded and depressurized by the expansion power plant 400. Through the mode, the gas circulation channel is formed in the temperature difference power generation system, so that the gas expanded and depressurized by the expansion power generation device 400 can enter the hydrate generation device 100 to participate in the generation of the hydrate, the gas can be recycled, the gas resource can be saved, and the power generation cost is reduced.

In some embodiments of the present application, the hydrate dissociation device 200 may be connected to the hydrate generation device 100 via a first pump. The hydrate dissociation device 200 may pump the hydrate generated in the hydrate generation device 100 through the first pump.

FIG. 2 illustrates a schematic diagram of a thermoelectric generation system in some embodiments of the present application. The arrows in fig. 2 are used to illustrate the flow direction of hydrates, water or gas, or to indicate power output. As shown in fig. 2, in some embodiments of the present application, a hydrate generating apparatus may include: hydrate formation kettle 110, gas source 120, heat exchange layer 130, second pump 140, cold water source 150, condenser 160, and nozzle 170.

As shown in fig. 2, the hydrate formation kettle 110 may be provided with a first gas inlet 111, a first water inlet 112, and a discharge port 113. The gas source 120 may be connected to the first gas inlet 111 via the nozzle 170, so that the gas required for generating the hydrate may be supplemented into the hydrate generating kettle 110 via the first gas inlet 111 via the nozzle 170, and the gas may be used to supplement the gas reduced due to the equipment problem in time. The gas is sprayed by the nozzle, so that the gas can be uniformly sprayed on one hand, and the gas can be sprayed at high speed and high pressure on the other hand, which is beneficial to accelerating the generation of the hydrate. The first gas inlet 111 may also be connected to the expansion power generation device via a nozzle 170 to obtain the gas expanded and depressurized by the expansion power generation device, so as to form a gas circulation channel, so that the gas can be recycled. The first water inlet 112 may be connected to the hydrate dissociation apparatus via a condenser 160, so that water generated in the hydrate dissociation apparatus enters the hydrate generation tank 110 after being condensed by the condenser, a circulating liquid channel is formed, and the hydrate generation tank generates hydrate under a low temperature condition. The outlet 113 is connected to the hydrate dissociation device via a first pump 210 to provide the hydrate dissociation device with the generated hydrate.

Further, as shown in fig. 2, the first gas inlet 111 may be disposed at the bottom of the hydrate generating kettle 110, the first water inlet 112 may be disposed at the right side of the hydrate generating kettle 110 near the top, and the discharge port 113 may be disposed at the left side of the hydrate generating kettle 110 near the bottom. The arrangement of the positions in the above embodiments is merely exemplary, and the present application is not limited thereto.

With continued reference to fig. 2, heat exchange layer 130 may be disposed around the periphery of hydrate formation kettle 110. The heat exchange layer 130 may be provided with a second water inlet 131 and a first water outlet 132. The second water inlet 131 may be connected to the cold water source 150 via the second pump 140, so that cold water in the cold water source 150 is pumped into the heat exchange layer 130 by the second pump 140, and heat released when the hydrate is generated in the hydrate generation kettle 110 can be timely taken away by the cold water in the heat exchange layer 130, thereby accelerating the generation of the hydrate. The first water outlet 132 may be used to discharge water having a temperature increased by absorbing heat in the heat exchange layer 130. The condenser 160 may be connected to the cold water source 150 via the second pump 140, so that the cold water in the cold water source 150 is pumped into the condenser 160 by the second pump 140, so as to cool the water entering the hydrate generation kettle 110 and participating in hydrate generation, thereby accelerating hydrate generation. The cold water source 150 may be subsea cold water, and the subsea cold water may be pumped by the second pump 140, and a portion of the subsea cold water enters the condenser 160 and another portion of the subsea cold water enters the heat exchange layer 130. For example, natural 3-4 ℃ cold water at the bottom of the sea can be fully utilized to cool the liquid in the circulating channel, which is beneficial to accelerating the formation of hydrate generating conditions and further accelerating the generation of hydrates.

Further, as shown in fig. 2, the second water inlet 131 may be disposed near the bottom of the heat exchange layer 130, and the first water outlet 132 may be disposed near the top of the heat exchange layer 130, so that the cold water can sufficiently take away heat generated when the hydrate is generated in the hydrate generation tank 110. The arrangement of the positions in the above embodiments is merely exemplary, and the present application is not limited thereto.

With continued reference to fig. 2, in some embodiments of the present disclosure, the hydrate dissociation apparatus includes a hydrate dissociation vessel 220. The hydrate dissociation kettle 220 is provided with a feed inlet 221, a first gas outlet 222 and a second water outlet 223. Wherein the feed port 221 is connected to the discharge port 113 of the hydrate formation tank 110 via the first pump 210 to extract the hydrate formed in the hydrate formation tank 110. The first gas outlet 222 is connected to the gas dehydration device to release the gas generated by dissociation in the hydrate dissociation kettle 220 into the gas dehydration device. The second water outlet 223 is connected to the first water inlet 112 of the hydrate generating kettle 110 via the condenser 160, so as to condense the generated water and release the condensed water to the hydrate generating kettle 110 to participate in hydrate generation.

In some embodiments of the present application, the hydrate dissociation device may be located at sea level. Referring to fig. 2, as shown in fig. 2, the hydrate dissociation apparatus may further include a line 224. The hydrate dissociation vessel 220 may also be provided with opposing first 225 and second 226 openings. Line 224 runs through hydrate dissociation vessel 220 via first opening 225 and second opening 226. Wherein the line 224 is used for circulating seawater at sea level. As shown in fig. 2, the right opening of the pipeline 224 may be a water inlet for inflow of seawater at sea level (i.e., sea level warm water). The left opening of the pipeline 224 may be a water outlet for flowing out the sea level warm water. The sea level warm water circulating in the pipeline 224 can sufficiently heat the hydrate in the hydrate dissociation kettle, and the dissociation of the hydrate is accelerated. For example, the hydrate dissociation kettle 220 may be located in a natural environment at sea level of 20-30 ℃, and the sea level warm water circulating in the pipeline may sufficiently heat the hydrate dissociation kettle 220 to accelerate the dissociation of the hydrate. One pipeline is exemplarily shown in fig. 2, it being understood that the hydrate dissociation device may further comprise a plurality of pipelines, e.g. 2 pipelines, 3 pipelines, 5 pipelines, etc. Accordingly, the hydrate dissociation vessel may be provided with a plurality of pairs of first and second openings. Further, the hydrate formation tank 110 may be located near the sea level to facilitate the extraction of the hydrate from the hydrate formation apparatus.

With continued reference to FIG. 2, in some embodiments of the present application, the gas dehydration engine includes a gas dehydration tank 310. The gas dewatering tank 310 is provided with a second gas inlet 311 and a second gas outlet 312. Wherein, the second gas inlet 311 is connected with the first gas outlet 222 of the hydrate dissociation kettle 220. The second gas outlet 312 of the gas dehydration tank 310 is connected to an expansion power generation device to release the dehydrated high-pressure gas into the expansion power generation device.

With continued reference to FIG. 2, in some embodiments of the present application, the expansion power plant includes a turbine generator 410. The turbine generator 410 is provided with a third inlet 411 and a third outlet 412. The third gas inlet 411 of the turbine generator 410 is connected to the second gas outlet 312 of the gas dewatering tank 310 to obtain the dewatered gas. A third outlet 412 of the turbine generator 410 is connected to the first inlet 111 of the hydrate formation kettle 110 via the nozzle 170 to release the expanded gas to the hydrate formation kettle, forming a gas circulation path so that the gas can be recycled. For example, a turbine generator can expand and reduce a high pressure of about 15MPa to about 5MPa, and the generated work Ws can be used for power generation.

Based on the same inventive concept, the embodiment of the present application further provides a thermoelectric generation method based on the thermoelectric generation system described in any of the above embodiments, as described in the following embodiments. Because the principle of solving the problem of the thermoelectric power generation method is similar to that of the thermoelectric power generation system, the implementation of the thermoelectric power generation method can refer to the implementation of the thermoelectric power generation system, and repeated parts are not described again. Fig. 3 is a flowchart of a thermoelectric power generation method according to an embodiment of the present application, and as shown in fig. 3, the method includes the following steps:

in step S301, a hydrate is generated by the hydrate generator.

Step S302, acquiring the hydrate generated in the hydrate generating device by the hydrate dissociation device, dissociating the acquired hydrate to generate gas and water, and releasing the generated gas to the gas dehydration device.

Specifically, hydrates can be generated from water and gas by a hydrate generating apparatus under low temperature conditions. The hydrate generating device is connected with the hydrate dissociation device. The hydrate dissociation device can obtain the hydrate generated in the hydrate generation device. The hydrate dissociation device may dissociate the generated hydrate to generate high pressure gas and water, and release the generated high pressure gas to the gas dehydration device. Wherein, the gas dehydration device is connected with the hydrate dissociation device.

Step S303, dehydrating the gas by the gas dehydration device, and releasing the dehydrated gas to the expansion power generation device.

The gas dehydration device may dehydrate the gas generated in the hydrate dissociation device and release the dehydrated gas to the expansion power generation device. Wherein, the expansion power generation device is connected with the gas dehydration device.

And step S304, expanding and depressurizing the dehydrated gas through an expansion power generation device so as to convert the internal energy of the dehydrated gas into electric energy.

The expansion power generation device can expand and reduce the pressure of the dehydrated gas, and the output power can be used for power generation, so that the content of the dehydrated gas is converted into electric energy.

According to the scheme, the hydrate is generated at a low temperature through the hydrate generation device, the hydrate is dissociated at a high temperature through the hydrate dissociation device to generate high-pressure gas and water, the generated high-pressure gas is dehydrated through the gas dehydration device, and then the dehydrated high-pressure gas is expanded and depressurized through the expansion power generation device so as to convert the internal energy of the dehydrated high-pressure gas into electric energy, so that power generation is realized by using the temperature difference and the hydrate, a dam is not required to be built even if fossil fuel is not combusted, the cost can be saved, and the environment is protected. Furthermore, the power generation can be carried out by combining the natural huge temperature difference between the sea bottom and the sea level with the hydrate, the natural huge temperature difference between the sea bottom and the sea level can be converted and utilized, the self-power utilization rate is effectively reduced, meanwhile, the natural energy can be greatly utilized, the power generation stability and power generation capacity are improved, the power generation device has good social and economic benefits, and the industrial application and popularization potential is huge.

In some embodiments of the present application, the hydrate formation device may be connected to a hydrate dissociation device to obtain water produced by the hydrate dissociation device; and/or the hydrate generating device can be connected with the expansion generating device to obtain the gas expanded and depressurized by the expansion generating device.

In some embodiments of the present application, the hydrate dissociation device may be connected to the hydrate generation device via a first pump to extract the hydrate generated in the hydrate generation device by the first pump.

In some embodiments of the present application, a hydrate generating apparatus may comprise: the device comprises a hydrate generation kettle, a gas source, a heat exchange layer, a second pump, a cold water source, a condenser and a nozzle; the hydrate generating kettle can be provided with a first air inlet, a first water inlet and a discharge hole; the gas source is connected with the first gas inlet through the nozzle so as to supplement gas required for generating the hydrate into the hydrate generating kettle through the nozzle through the first gas inlet, and the first gas inlet is also connected with the expansion power generation device through the nozzle so as to obtain the gas expanded and depressurized by the expansion power generation device; the first water inlet is connected with the hydrate dissociation device through the condenser, so that water generated in the hydrate dissociation device enters the hydrate generation kettle after being condensed by the condenser; the discharge port is connected with the hydrate dissociation device through a first pump so as to provide generated hydrate for the hydrate dissociation device; the heat exchange layer is arranged at the periphery of the hydrate generation kettle and is provided with a second water inlet and a first water outlet, the second water inlet is connected with a cold water source through a second pump so as to pump cold water in the cold water source into the heat exchange layer through the second pump, and the first water outlet is used for discharging water in the heat exchange layer; the condenser is connected with the cold water source through a second pump, and cold water in the cold water source is pumped into the condenser through the second pump.

In some embodiments of the present application, the hydrate dissociation device may include a hydrate dissociation kettle, wherein the hydrate dissociation kettle may be provided with a feed inlet, a first gas outlet, and a second water outlet, wherein the feed inlet is connected to the discharge port of the hydrate generation kettle via a first pump, the first gas outlet is connected to the gas dehydration apparatus to release the gas generated by dissociation into the gas dehydration apparatus, and the second water outlet is connected to the first water inlet of the hydrate generation kettle via a condenser.

In some embodiments of the present application, the gas dehydration apparatus may include a gas dehydration tank, and the gas dehydration tank may be provided with a second gas inlet and a second gas outlet; the second gas inlet is connected with the first gas outlet of the hydrate dissociation kettle, and the second gas outlet of the gas dehydration tank is connected with the expansion power generation device.

In some embodiments of the present application, the expansion power generation device may comprise a turbine generator, and the turbine generator may be provided with a third gas inlet connected to the second gas outlet of the gas dehydration tank and a third gas outlet connected to the first gas inlet of the hydrate formation tank via a nozzle.

In some embodiments of the present application, the gas may include at least one of: methane, ethane, propane, carbon dioxide and nitrogen.

In some embodiments of the present application, the hydrate dissociation apparatus may be located at sea level, the hydrate dissociation apparatus further includes a pipeline, the hydrate dissociation kettle is further provided with a first opening and a second opening which are opposite to each other, the pipeline passes through the hydrate dissociation kettle via the first opening and the second opening, and the pipeline is used for circulating seawater at sea level; and/or the cold water source may comprise subsea cold water.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the application should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the pending claims along with the full scope of equivalents to which such claims are entitled.

From the above description, it can be seen that the embodiments of the present application achieve the following technical effects: the hydrate is generated at low temperature by using the hydrate generating device, the hydrate is dissociated at high temperature by using the hydrate dissociating device to generate high-pressure gas and water, then the generated high-pressure gas is dehydrated by using the gas dehydrating device, and the dehydrated high-pressure gas is expanded and depressurized by using the expansion generating device so as to convert the internal energy of the dehydrated high-pressure gas into electric energy, thereby realizing the power generation by using the temperature difference and the hydrate, avoiding the need of burning fossil fuel and building a dam, saving the cost and protecting the environment. Furthermore, the power generation is carried out by combining the natural huge temperature difference between the sea bottom and the sea level with the hydrate, the natural huge temperature difference between the sea bottom and the sea level can be converted and utilized, the self-power utilization rate is effectively reduced, meanwhile, the natural energy can be greatly utilized, the power generation stability and power generation capacity are improved, the power generation device has good social and economic benefits, and the industrial application and popularization potential is huge.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and it will be apparent to those skilled in the art that various modifications and variations can be made in the embodiment of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.