CN115899568A - Sealed exhaust gas recovery steam power system - Google Patents

Abstract

The invention discloses a sealed tail gas recovery steam-driven system, which relates to the technical field of steam power systems and mainly comprises a vaporization device, a steam working device, a tail gas recovery device, a pressurization device, a liquefaction device and a liquid recovery device. The invention utilizes the principle that the boiling point of liquid is increased along with the increase of pressure of general liquid, and the tail gas is pressurized by the tail gas recovery device to improve the boiling point, so that the tail gas is recovered in a sealing way, the closed circulation of liquid media is realized, the dependence on the external environment is eliminated, and the pneumatic system works in a sealing environment. Because the tail gas is not re-liquefied by depending on the external environment temperature, a steam-driven system suitable for a low-temperature environment can be manufactured by selecting liquid with a lower boiling point under the conventional atmospheric pressure as a medium for liquid-vapor conversion and additionally arranging an air heat exchanger in a vaporizing device, and the purpose of converting heat energy in air energy into kinetic energy is realized.

Description

Sealed exhaust gas recovery steam power system

technical field

The invention relates to the technical field of gas power systems, in particular to a sealed exhaust gas recovery gas power system.

Background technique

The traditional principle used to drive gas to do work is that the liquid medium is vaporized in a certain container, causing the pressure in the container to rise, and there is a pressure difference with the outside world. The gas flows from the inside of the high-pressure container to the low-pressure area outside, pushing the gas to do work. The device moves, thereby realizing the conversion from thermal energy to mechanical energy.

Because the tail steam after passing through the gas work device, the tail steam refers to the gas output from the output end of the gas work device. Although its pressure and temperature are reduced, it is still in a vaporized state. The current technology for these tail steam is generally Dispose of it, discharge it directly into the atmosphere, or continue to cool down through other media, such as heat exchange, and recycle it after liquefaction, but these methods do not get rid of the dependence on the working environment. Generally, you can only choose As water is its liquid medium, the overall working environment is also maintained at atmospheric pressure. Therefore, the operating temperature of the steam engine driven by the traditional gas work device generally needs to be 100°C higher than the boiling point of water at atmospheric pressure, which cannot be achieved in a low temperature environment. In normal operation, it cannot effectively convert heat energy in the air into kinetic energy.

Contents of the invention

The purpose of the present invention is to provide a sealed exhaust gas recovery steam-driven system, which can efficiently recover and utilize the exhaust gas and is suitable for low-temperature working environments.

The above-mentioned technical purpose of the present invention is achieved by the following technical solutions: the sealed exhaust gas recovery steam-driven system includes a vaporization device, a gas work device, an exhaust gas recovery device, a pressurizing device, a liquefaction device, and a liquid recovery device. The vaporization device can change the medium of the liquid form into a vapor state, and the steam outlet end and the liquid inlet end are respectively connected to the steam inlet end of the gas work device and the liquid outlet end of the liquid recovery device through a sealed connection. connected, the vapor working device communicates with the exhaust gas recovery device and/or is located inside the exhaust gas recovery device, one end of the exhaust gas recovery device communicates with the pressurizing device, and/or the The pressure device is located inside the exhaust gas recovery device. The pressurization device can be driven to pressurize the gas delivered by the exhaust gas recovery device. It is connected with the liquefaction device. The liquefaction device can pass through the exhaust gas recovery device. The gas pressurized by the pressurizing device changes from a vapor state to a liquid state, which is connected to the liquid recovery device, and the liquefaction recovery device can retransmit the liquid liquefied by the liquefaction device to the vaporization inside the device.

As an example, it also includes a liquid medium for vaporizing circulation within the vaporizing device.

As an example, the outlet end of the exhaust gas recovery device is connected to the steam inlet end of the pressurizing device, and the output end of the pressurizing device is connected to the steam inlet end of the liquefaction device.

As an example, the pressurizing device includes a sealed cylinder body 1 and a piston 1 slidably arranged inside it, and one end of the sealed cylinder body 1 is provided with a steam inlet check valve 1 and a steam outlet check valve 1 in sequence, the The other end of the sealed cylinder body is provided with a steam inlet check valve 2 and a steam outlet check valve 2 in sequence.

As an example, the tail gas recovery device communicates with the steam inlet one-way valve one and the steam inlet one-way valve two respectively through branch pipe one, and the liquefaction device communicates with the steam outlet one-way valve one through branch pipe two It communicates with the second steam outlet check valve respectively.

As an example, the first piston is connected with a power device one.

As an example, a steam injection control valve is provided on the steam outlet end of the vaporization device, and a liquid control valve is provided at the connection between the liquid recovery device and the liquefaction device.

As an example, the vaporization device includes an air heat exchanger and a pressure vessel, and the air heat exchanger communicates with the pressure vessel.

As an example, it also includes a self-pressurizing device, which is driven by the high-pressure gas in the vaporization device, and can pressurize the gas delivered by the exhaust gas recovery device, which is connected with the liquefaction device connected.

As an example, the liquid medium is a liquid with a relatively low boiling point at normal atmospheric pressure.

Beneficial effects of the present invention: Compared with the prior art, the present invention utilizes the principle that the boiling point of the general liquid increases with the increase of the pressure, and pressurizes the tail steam through the exhaust steam recovery device to increase the boiling point , the exhaust gas is sealed and recovered to avoid the leakage of the exhausted exhaust gas, realize the closed cycle of the liquid medium, and get rid of the dependence on the external environment, so that it can work in a sealed environment, because the exhaust gas is no longer dependent on the external environment temperature. Liquefaction, in the present invention, a liquid with a lower boiling point under conventional atmospheric pressure is selected as the medium for liquid-vapor conversion, and an air heat exchanger is installed in the vaporization device, so that a steam-driven system suitable for low-temperature environments can be manufactured, and the air energy can be converted into The purpose of converting thermal energy into kinetic energy.

The features and advantages of the present invention will be described in detail with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram for illustrating connections between devices in an embodiment of the present invention;

Fig. 2 is an enlarged view of part A in Fig. 1 .

Reference signs: 1. Vaporization device; 101. Pressure vessel; 102. Air heat exchanger; 103. Electric water pump; 2. Gas work device; 3. Tail steam recovery device; 4. Pressurization device; Check valve one; 402, steam inlet check valve two; 403, power unit one; 404, steam outlet check valve one; 405, piston one; 406, steam outlet check valve two; 407, sealing cylinder body one; 5. Liquefaction device; 501. Liquid control valve; 6. Liquid recovery device; 601. Steam inlet check valve 3; 602. Power device 2; 603. Liquid outflow check valve 1; 604. Piston 2; 605. Steam inlet One-way valve four; 606, liquid outflow one-way valve two; 607, sealed cylinder two; 7, liquid medium; 8, steam injection control valve; 9, self-pressurizing device; 901, six-way valve; 902, steam inlet Check valve five; 903, steam inlet check valve six; 904, steam outlet check valve three; 905, piston three; 906, steam outlet check valve four; 907, sealed cylinder three; 908, sealed cylinder four ; 909, four pistons; 10, connecting rod; 11, power output device; 12, one branch pipe; 13, two branch pipes.

Detailed ways

The following description is only a preferred embodiment of the present invention, and the scope of protection is not limited to this embodiment. All technical solutions belonging to the thinking of the present invention should belong to the scope of protection of the present invention. As far as personnel are concerned, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

It should be noted that, in this article, "vapor" refers to the gaseous substance that becomes from the liquid after being heated, "vaporization" refers to changing the liquid substance into a vapor state substance, and "liquefaction" refers to changing the vapor state substance into a gaseous substance. In this article, the orientation words mentioned in this embodiment, such as "up, down, left, right", etc., are only used in conjunction with the drawings to enable those skilled in the art to understand the relationship between each feature or part, etc. connection between.

As shown in Figure 1, a sealed exhaust gas recovery steam-driven system includes a vaporization device 1. In this embodiment, the vaporization device 1 is composed of a pressure vessel 101 and an air heat exchanger 102, wherein the air heat exchanger 102 flows to An electric water pump 103 is fixed on the pipeline of the pressure vessel 101, and the pressure vessel 101 is a sealed container made of a high-pressure resistant material, which is communicated with a steam outlet and a liquid inlet, and the steam outlet on the right side passes through a gas flow pipe ( (not marked in the accompanying drawings) are respectively connected with the air intake end of the gas work device 2 and communicated with the six-way valve 901, and the steam injection control valve 8 is fixed at the connection between the gas flow pipe and the gas work device 2. In this example, The steam injection control valve 8 can adjust the frequency and size of the opening and closing of the inner aperture of the control valve, and control the size of the gas flow through its interior, so as to achieve the purpose of adjusting the output power of the system.

The liquid inlet end above the pressure vessel 101 is connected with the liquid outlet end of the liquid recovery device 6. The air heat exchanger 102 in the vaporization device 1 adopts an air-conditioning condenser structure and communicates with the pressure vessel 101 through a metal flow pipe. The electric water pump 103 Installed between the air heat exchanger 102 and the pressure vessel 101, so that the liquid medium 7 can flow between the two.

Including a vapor work device 2 and an exhaust gas recovery device 3, the vapor work device 2 adopts a steam turbine structure, and its output end is provided with a power output device 11, and its purpose is to use the vapor work device 2 as a driving method. In this embodiment , The exhaust gas recovery device 3 adopts a closed container to seal the vapor work device 2 in its interior as a whole.

It includes a pressurizing device 4. In this embodiment, the pressurizing device 4 is composed of a sealed cylinder body 407 and a piston 405 slidingly arranged inside it. The outer upper end of the sealed cylinder body 407 is welded and fixed in sequence from right to left. Directional valve 1 401 and steam outlet check valve 1 404, the outer lower ends of which are sequentially welded and fixed with steam inlet check valve 2 402 and steam outlet check valve 2 406, steam inlet check valve 1 401 and steam inlet check valve 2 402 communicates with the exhaust gas recovery device 3 through the first branch pipe 12 , and the first steam outlet check valve 404 and the second steam outlet check valve 406 communicate with the inside of the liquefaction device 5 through the second branch pipe 13 . The pressurizing device 4 also includes a power unit one 403. In this example, the power unit one 403 adopts an electric motor, and its output end is penetrated into the inside of the sealed cylinder body one 407 to be connected with the piston one 405. Device 1 403 drives the piston 1 405 connected to it to reciprocate, pressurizes the gas delivered by the exhaust gas recovery device 3, and passes the pressurized gas through the steam outlet check valve 1 404 and the steam outlet check valve The second 406 is transported to the inside of the liquefaction device 5 through the branch pipe two 13 .

In this embodiment, the liquefaction device 5 adopts a sealed container made of a high-pressure-resistant material. The liquid recovery device 6 is located below the liquefaction device 5 , a liquid control valve 501 is fixed on the outer wall of the liquefaction recovery device 6 , and the other end of the liquid control valve 501 communicates with the liquefaction device 5 . The liquid recovery device 6 also includes a power unit 2 602 , a sealed cylinder 2 607 , and a piston 2 604 located inside the sealed cylinder 607 and horizontally sliding along its length. The power device 2 602 is set outside the sealed cylinder 607, and its output end extends into the inside of the sealed cylinder 607 to connect with the piston 2 604. The upper side of the outer wall of the sealed cylinder 607 is welded and fixed with a steam inlet unidirectional valve from left to right. Valve three 601 and steam inlet one-way valve four 605 are welded and fixed with liquid outflow one-way valve one 603 and liquid outflow one-way valve two 606 on the lower side of the outer wall from left to right. When the power device 2 602 drives the piston 2 604 to move, the liquid collected in the liquid recovery device 6 can be re-transported to the pressure vessel 101 in the vaporization device 1 through the liquid outflow check valve 1 603 and the liquid outflow check valve 2 606 middle.

Including the self-pressurizing device 9, in this embodiment, the self-pressurizing device 9 is composed of a six-way valve 901, a sealed cylinder three 907, a piston three 905 slidably arranged inside it, a sealed cylinder four 908 and a slidingly arranged inside it Composed of piston four 909, piston three 905 is provided with a connecting rod 10 connected with piston four 909, and the upper end of the outer wall of the sealed cylinder three 907 is welded and fixed from left to right with steam outlet check valve three 904 and steam inlet check valve five 902 , the lower end of the outer wall is welded and fixed with steam outlet check valve four 906 and steam inlet check valve six 903 from left to right.

The six-way valve 901 has six ventilation holes in total, as shown in Figure 1, the lower two ventilation holes are respectively connected to the steam outlet end of the vaporization device 1 and the steam inlet end of the gas work device 2, and the upper four ventilation holes, from left to Arrange right, the first and the third are a group, the second and the fourth are a group, respectively connected to the upper and lower ends of the sealed cylinder three 907. The six-way valve 901 has three states, one state is the closed state, that is, the lower two air holes are closed, the second state is that the first and third groups are closed, and the others are opened, and the third state is that the second and fourth groups are closed, and the others are opened. The self-pressurizing device 9 introduces the high-pressure gas in the vaporization device 1 into the sealed cylinder 4 908 through the six-way valve 901, drives the piston 3 905 to move indirectly by driving the piston 4 909, and carries out the gas delivered by the exhaust gas recovery device 3 Pressurize, and deliver the pressurized gas to the inside of the liquefaction device 5 through the steam outlet check valve three 904 and the steam outlet check valve four 906.

A liquid medium 7 is stored inside the vaporization device 1. In this embodiment, a freon with a boiling point of -29.8°C under atmospheric pressure is used as the liquid medium 7. In this embodiment, the vaporization device 1, the gas work device 2, and the exhaust gas recovery device 3. Pressurization device 4, liquefaction device 5, liquid recovery device 6.

Combined with the example diagram, select a Freon with a boiling point of -29.8°C under atmospheric pressure as the liquid medium 7, set the initial vacuum inside the system, and inject an appropriate amount of liquid medium 7-Freon to ensure that the vaporization device 1 can operate at the rated maximum operating temperature. There is still liquid Freon in the pressure vessel 101.

The initial state of the system is set as follows: the steam injection control valve 8 and the six-way valve 901 are in the closed state, the power unit 1 403 and the power unit 2 602 are in the closed state, the liquid control valve 501 is in the open state, and the electric water pump 103 is in the closed state.

In order to simplify the following description, it is assumed that the pressure in vaporization device 1 is P1 and the temperature is T1; the exhaust pressure of steam power device 2 is P2 and the temperature is T2; the pressure in exhaust gas recovery device 3 is P3 and the temperature is T3; the pressure in the liquefaction device 5 is P4, and the temperature is T4. It should be noted that these values do not specifically refer to one or several constant numbers.

Working mode one: the single working mode of power device one 403 .

The first step is to start the electric water pump 103, pump the liquid medium 7 stored in the pressure vessel 101 of the vaporization device 1 to the air heat exchanger 102, and let the liquid medium 7 continue to flow between them, and the liquid medium flowing through 7-Freon absorbs heat in the air through the air heat exchanger 102, and the temperature is heated to be close to the air temperature at that time. The heated Freon flows into the pressure vessel 101, and the overall temperature of the liquid medium 7 in the pressure vessel 101 continues to increase. When The temperature of the liquid medium 7 in the container rises to the boiling point of Freon under the pressure at that time, and the Freon begins to vaporize. As the Freon continues to vaporize, the pressure in the pressure vessel 101 continues to rise until the temperature of the Freon in the pressure vessel 101 is equal to the boiling point temperature under the pressure. Consistent, reaching a saturated vaporization state, the vaporization will temporarily stop.

The second step is to start the power unit 1 403 and adjust the pressure P3 in the exhaust gas recovery device 3 to keep it at the pressure requirement under the rated working condition. The power unit 1 403 pushes the piston 1 405 in the pressurizing device 4 to reciprocate, and the tail steam entering through the steam inlet check valve 1 401 or the steam inlet check valve 2 402 at the end of the piston 405 passes through the steam outlet check valve 1 404 or the steam outlet check valve 2 406 discharges to the inside of the liquefaction device 5 .

The third step is to control the steam injection control valve 8 to open, and the gas in the vaporization device 1 is ejected. At this time, the temperature of the gas is T1, and the pressure is P1. Since the exhaust gas recovery device 3 is covered outside the gas work device 2 , the gas work device 2 tail pressure value P2 is the same as P3, lower than P1, therefore, the ejected gas moves to the gas work device 2 tail, drives the gas work device 2 - the impeller in the steam turbine rotates to do work, and outputs power , transforming the thermal energy in the gas into kinetic energy. As the thermal energy in the gas is continuously converted into kinetic energy, the atmospheric pressure and temperature of the gas decrease continuously, and its volume increases. After passing through the gas work device 2, the atmospheric pressure P2 and temperature T2, at this time P2<P1, T2<T1.

The exhaust steam enters the exhaust steam recovery device 3 under the action of steam pressure and mixes with the gas therein. The atmospheric pressure P3 and temperature T3 rise, and the elevated P3 and T3 are close to the values of P2 and T2. Since the exhaust steam recovery device 3 and The pressurizing device 4 is connected, and part of the exhaust steam after mixing enters the inside of the sealed cylinder 1 407 of the pressurizing device 4 through the steam inlet check valve 1 401 or the steam inlet check valve 2 402 .

Keep the power unit 1 403 working continuously, push the piston 1 405 in the pressurizing device 4 to reciprocate, and discharge the gas at the end of the piston 405 to the liquefaction device 5 through the steam outlet check valve 1 404 or the steam outlet check valve 2 406 Inside, the internal pressure of the liquefaction device 5 is P4, and the internal temperature is T4. Since there is no heating and liquefaction begins, T4 is initially the value of T3. With the continuous reciprocating movement of the piston-405, the gas in the liquefaction device 5 continues to increase, and the pressure P4 continues to rise, when the pressure of P4 rises to the pressure value when the boiling point of the liquid medium 7 is T4, the gas in the liquefaction device 5 begins to liquefy, and releases heat at the same time, the volume decreases, P4 decreases, and T4 rises. When the liquefaction device 5 The reduced volume and increased temperature are just offset by the continuous entry of new gas. At this time, P4 and T4 in the liquefaction device 5 remain stable and are in a saturated state of vaporization, and the liquefaction continues. The work done by device 2 reduces the heat energy contained inside it compared to the initial stage. Therefore, the saturated vapor pressure in liquefaction device 5 must be lower than that in vaporization device 1, and the temperature T4 of the liquefied liquid must also be lower than T1.

Under the action of gravity, the liquefied liquid passes through the opened liquid control valve 501 and gathers in the liquid recovery device 6 located at the lower part of the liquefaction device 5 .

In the fourth step, the control system (not shown in the drawings) detects that the liquid recovery device 6 is full of liquid. It should be noted that the liquid control valve 501 can also be closed in a timing manner, and the power device 2 602 is started to drive the piston 2. 604 movement, the liquid in the liquid recovery device 6 flows out of the one-way valve 603 or out of the one-way valve 606 through the liquid, and reinjects into the inside of the vaporization device 1 to complete a cycle. Since the recovered liquid temperature is T4, low Based on the temperature T1 in the vaporization device 1, the temperature of the liquid medium 7 in the vaporization device is lowered to complete a cycle process of converting heat into kinetic energy.

Working mode two: power unit one 403 and self-pressurizing unit 9 dual working modes.

The first step is to start the electric water pump 103, pump the liquid medium 7 stored in the pressure vessel 101 of the vaporization device 1 to the air heat exchanger 102, and let the liquid medium 7 continue to flow between them, and the liquid medium 7 flowing through - Freon absorbs heat in the air through the air heat exchanger 102, and the temperature is heated to be close to the air temperature at that time. The heated Freon flows into the pressure vessel 101, and the overall temperature of the liquid medium 7 in the pressure vessel 101 is continuously increased. When the container The temperature of the internal liquid medium 7 rises to the boiling point of Freon under the pressure at that time, and Freon begins to vaporize. As Freon continues to vaporize, the pressure in the pressure vessel 101 continues to rise until the temperature of Freon in the pressure vessel 101 is equal to the boiling point temperature under the pressure. Consistent, reaching a saturated vaporization state, the vaporization will temporarily stop.

At the same time, the control system (not shown in the drawings) detects the value of the pressure P3 in the exhaust gas recovery device 3 through the air pressure sensor (not shown in the drawings), if the value of P3 is higher than the required air pressure value during rated work , start the power device one 403, drive the pressurizing device 4 to work, reduce the pressure P3 in the exhaust gas recovery device 3, and adjust the pressure of P3 to an appropriate level. Under working conditions, the value of P3 should be smaller than the pressure P1 in the vaporization device 1.

The second step is to open the air hole of the six-way valve 901, keep the two air holes below the six-way valve 901 respectively connected to the vaporization device 1 and the gas work device 2 to keep unblocked, and push the slider in the six-way valve 901 to move, Let one or three groups of vent holes or one of two or four groups of vent holes inside it be opened, and the other group be closed, and the high-pressure gas in the vaporization device 1 enters the sealed cylinder four 908 through one or two vent holes in the six-way valve 901 One end of the inner piston four 909, the other end of the piston four 909 in the sealed cylinder four 908 High-pressure gas flows into the gas work device 2 through the three or four vent holes in the six-way valve 901, and the high-pressure gas pushes the sealed cylinder Piston 4 909 in 4 908 moves toward one end, thereby driving piston 3 905 connected to it to move in sealed cylinder 3 907, and as piston 3 905 moves in sealed cylinder 3 907, the piston 3 905 passes through one end The tail steam entered by the steam check valve five 902 or the steam inlet check valve six 903 is discharged to the inside of the liquefaction device 5 through the steam outlet check valve three 904 or the steam outlet check valve four 906 .

The high-pressure gas flowing from the three or four vent holes in the six-way valve 901 to the gas work device 2 completes the process of converting heat into kinetic energy through the gas work device 2, and the exhaust gas enters the tail steam recovery device 3, and at the same time, According to the needs of power, the steam injection control valve 8 can be controlled to open, and the high-pressure gas in the vaporization device 1 can be ejected to perform work at the same time.

In addition, the control system (not shown in the drawings) detects the values of the pressures P3 and P4 in the exhaust gas recovery device 3 and the liquefaction device 5 through the air pressure sensors (not shown in the drawings), if the values of P3 and P4 Higher or lower than the required air pressure value during rated work, start the power unit 1 403, drive the pressurization device 4 to work, reduce the pressure P3 in the exhaust gas recovery device 3, and increase the pressure value of P4 in the liquefaction device 5 at the same time, the The values of P3 and P4 were kept at appropriate levels.

The third step is to control the six-way valve 901 to continuously switch between the first and third groups of vent holes and the second and fourth groups of vent holes, and determine whether to maintain the power unit 1 403 to work according to the state of the pressure P3 and P4 values.

Through the reciprocating motion of the piston three 905 in the self-pressurizing device 9 and the piston one 405 in the pressurizing device 4, the exhaust steam in the exhaust steam recovery device 3 is pressurized, and passes through the steam outlet check valve three 904 or the steam outlet single valve. Direction valve four 906, and steam outlet one-way valve one 404 or steam outlet one-way valve two 406 discharge to the inside of the liquefaction device 5 . In this embodiment, steam outlet one-way valve 404, steam outlet one-way valve two 406, steam outlet one-way valve three 904, and steam outlet one-way valve four 906 share a steam outlet pipe, that is, branch pipe two 13; Check valve one 401 , steam inlet check valve two 402 , steam inlet check valve five 902 , and steam inlet check valve six 903 share a steam inlet pipe, namely branch pipe one 12 . The internal pressure of the liquefaction device 5 is P4, and the internal temperature is T4. Since there is no heating and the liquefaction starts, T4 is initially the value of T3. With the continuous reciprocating motion of the piston 3 905 and the piston 1 405, the gas in the liquefaction device 5 continues to increase , the pressure continues to rise, when the internal pressure P4 of the liquefaction device 5 rises to the air pressure value when the boiling point of the liquid medium 7 is T4, the gas in the liquefaction device 5 starts to liquefy, releases heat at the same time, and the volume decreases, resulting in a decrease in P4 and T4 liters High, when the reduced volume and increased temperature in the liquefaction device 5 are just offset by the continuous entry of new gas, at this time the P4 and T4 in the liquefaction device 5 remain stable, in a saturated state of vaporization, and the liquefaction continues.

Under the action of gravity, the liquefied liquid passes through the opened liquid control valve 501 and gathers in the liquid recovery device 6 located at the lower part of the liquefaction device 5 .

Step 4: When the control system (not shown in the accompanying drawings) detects that the liquid inside the liquid recovery device 6 is full, it should be noted that the liquid control valve 501 can also be closed in a timing manner, and the power device 2 602 is started to pass through the piston. Two 604 moves, and the liquid in the liquid recovery device 6 flows out of the one-way valve 603 or the one-way valve 606 through the liquid, and reinjects the liquid into the vaporization device 1 to complete a recycling. Since the temperature of the recovered liquid is T4, which is lower than the temperature T1 in the vaporization device 1, the temperature of the liquid medium 7 in the vaporization device 1 is reduced, and a cycle process of converting heat into kinetic energy is completed.

The above-mentioned embodiment is an illustration of the present invention, not a limitation of the present invention, and any solution after a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims (10)

1. The sealed exhaust gas recovery steam-driven system is characterized in that it includes a vaporization device (1), a gas work device (2), an exhaust gas recovery device (3), a pressurization device (4), and a liquefaction device (5) , liquid recovery device (6); The vaporization device (1) can change the medium in the liquid form into a vapor state, and its steam outlet end and liquid inlet end are respectively connected with the steam inlet end of the gas work device (2) and the gas inlet end through a sealed connection. The liquid outlet of the liquid recovery device (6) is connected; The gas working device (2) is connected with the exhaust gas recovery device (3) and/or is located inside the exhaust gas recovery device (3), and one end of the exhaust gas recovery device (3) is connected to the pressurizing device (4) communicate with each other, and/or the pressurizing device (4) is located inside the exhaust gas recovery device (3); The pressurizing device (4) is driven to pressurize the gas delivered by the exhaust gas recovery device (3), and communicates with the liquefaction device (5); The liquefaction device (5) can change the gas pressurized by the pressurizing device (4) from a vapor state to a liquid state, and it is in communication with the liquid recovery device (6); The liquefaction recovery device can retransmit the liquid liquefied by the liquefaction device (5) to the vaporization device (1). 2. The sealed exhaust gas recovery aerodynamic system according to claim 1, characterized in that it further comprises a liquid medium (7) located in the vaporization device (1) for vaporization and circulation. 3. The sealed exhaust steam recovery aerodynamic system according to claim 1, characterized in that, the steam outlet end of the exhaust steam recovery device (3) communicates with the steam inlet end of the pressurizing device (4), The output end of the pressurizing device (4) communicates with the steam inlet end of the liquefaction device (5). 4. The sealed exhaust gas recovery aerodynamic system according to claim 1, characterized in that the pressurizing device (4) includes a sealed cylinder body (407) and a piston (405) slidingly arranged inside it , one end of the sealed cylinder body one (407) is provided with a steam inlet check valve one (401) and a steam outlet check valve one (404) in sequence, and the other end of the sealed cylinder body one (407) is sequentially provided with a steam inlet valve one (404). Check valve two (402) and steam outlet check valve two (406). 5. The sealed exhaust gas recovery aerodynamic system according to claim 4, characterized in that, the exhaust gas recovery device communicates with the inlet one-way valve (401) and the inlet valve through a branch pipe one (12). The two steam check valves (402) communicate with each other respectively, and the liquefaction device (5) is respectively connected with the first steam outlet check valve (404) and the second steam outlet check valve (406) through the second branch pipe (13). connected. 6 . The sealed exhaust gas recovery aerodynamic system according to claim 1 , characterized in that, the first piston ( 405 ) is connected with the first power device ( 403 ). 7. The sealed exhaust steam recovery steam-driven system according to claim 1, characterized in that a steam injection control valve (8) is arranged on the steam outlet end of the vaporization device (1), and the liquid recovery device (6 ) is provided with a liquid control valve (501) at the communication point with the liquefaction device (5). 8. The sealed exhaust gas recovery aerodynamic system according to claim 1, characterized in that, the vaporization device (1) comprises an air heat exchanger (102) and a pressure vessel (101), and the air heat exchanger (102) communicates with said pressure vessel (101). 9. The sealed exhaust gas recovery aerodynamic system according to claim 1, characterized in that it also includes a self-pressurizing device (9), and the self-pressurizing device (9) passes through the vaporization device (1) Driven by high-pressure gas, the gas delivered by the exhaust gas recovery device (3) can be pressurized, and it communicates with the liquefaction device (5). 10. The sealed exhaust gas recovery aerodynamic system according to claim 2, characterized in that the liquid medium (7) is a liquid with a relatively low boiling point under normal atmospheric pressure.

Images