CN116085775A

CN116085775A - Passive exhaust steam absorption device, system and method for recycling intermittent exhaust steam

Info

Publication number: CN116085775A
Application number: CN202111304707.8A
Authority: CN
Inventors: 刘义达; 祁金胜; 胡训栋; 张斌; 杨俊波
Original assignee: Shandong Electric Power Engineering Consulting Institute Corp Ltd
Current assignee: Shandong Electric Power Engineering Consulting Institute Corp Ltd
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2023-05-09

Abstract

The invention discloses a passive exhaust steam absorption device, a passive exhaust steam absorption system and a passive exhaust steam absorption method for recycling intermittent exhaust steam, which comprise the following steps: a dead steam absorption water tank; the exhaust steam absorption water tank is respectively provided with a first interface and a second interface; the first interface is connected with a steam exhaust pipe, and the second interface is connected with a respiratory tube; intermittent exhaust steam enters the exhaust steam absorption water tank through a steam exhaust pipe, and one end of the respiratory pipe is communicated with the atmosphere. The passive exhaust steam absorbing device for recycling intermittent exhaust steam is simple in scheme, easy to implement, low in investment cost and low in operation energy consumption, not only can recycle the working medium of exhaust steam, but also can recycle the heat of the exhaust steam through temperature monitoring by absorbing and utilizing the exhaust steam in the drainage concentrated recycling device through the exhaust steam absorbing device arranged at a higher position.

Description

Passive exhaust steam absorption device, system and method for recycling intermittent exhaust steam

Technical Field

The invention relates to the technical field of exhaust steam recovery, in particular to a passive exhaust steam absorption device, a passive exhaust steam absorption system and a passive exhaust steam absorption method for recovering intermittent exhaust steam.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

The exhaust steam refers to the waste steam produced in the industrial production process, and is usually low in pressure and temperature. Such as: the flash evaporation process is easy to generate exhaust steam, and the flash evaporation process in the fixed-row flash evaporation container is easy to generate exhaust steam; the constant-discharge capacity expander mainly reduces the pressure and expands the capacity of the periodic sewage of the boiler, and the periodic sewage is boiled for the second time under lower pressure to obtain a part of secondary steam, and simultaneously reduces the temperature of the sewage; the secondary steam and the sewage are separated in the regular blowdown flash tank, the separated steam is discharged from an outlet at the upper part, and the sewage is discharged into a trench from a sewage port at the lower part.

At present, most of secondary steam of equipment such as fixed-row expanders, atmospheric drainage expanders, low-pressure steam headers or concentration funnels for drainage water in power plants is directly discharged into the atmosphere, and effective recovery cannot be realized; during the venting to the atmosphere, a mixture of steam and air, known as exhaust steam, is formed; wherein, the vapor in the exhaust steam belongs to the gas which can be absorbed, and the air in the exhaust steam is non-condensing gas.

The prior art discloses that the exhaust steam recovery of the power plant is realized by adding equipment such as a pump, a valve, a venturi tube and the like, but the added equipment increases the complexity of the system; in addition, in actual operation, because the exhaust steam is not always generated, the exhaust steam discharge is intermittent, so that the pump or the fan is frequently started and stopped, and the pump or the fan is easy to break down.

The prior art also discloses that the exhaust steam recovery is realized by means of cooling, compression or chemical adsorption, but the method is applied to large-scale equipment occasions such as thermal power plants, and the like, so that the equipment investment is high, the energy consumption is high, or the adsorption material needs to be frequently replaced in the operation, and the maintenance cost is high.

Disclosure of Invention

In order to solve the problems, the invention provides a passive exhaust steam absorption device and a passive exhaust steam absorption method for recycling intermittent exhaust steam, which recycle hydraulic medium, realize whitening and realize near zero running of secondary steam of thermal state drainage flash evaporation.

In order to achieve the above object, according to a first aspect of the present invention, the following technical solutions are disclosed:

a passive exhaust steam absorption device for recovering intermittent exhaust steam, comprising: a dead steam absorption water tank; the exhaust steam absorption water tank is respectively provided with a first interface and a second interface; the first interface is connected with a steam exhaust pipe, and the second interface is connected with a respiratory tube; intermittent exhaust steam enters the exhaust steam absorption water tank through a steam exhaust pipe, and the respiratory pipe is communicated with the atmosphere.

As a further scheme, the steam exhaust pipe is connected from the top, the side surface or the bottom of the steam exhaust absorption water tank, and extends into a position below the liquid level of the steam exhaust absorption water tank and close to the bottom of the water tank; the steam exhaust pipe is in a water seal structure with a set shape at the connection position with the first connector.

According to a second aspect of the invention, the following technical solution is disclosed:

a passive exhaust steam absorption device for recovering intermittent exhaust steam, comprising: a dead steam absorption water tank; the exhaust steam absorption water tank is internally provided with at least one partition board, the partition board divides the exhaust steam absorption water tank into a working cabin and a balance cabin, the working cabin is communicated with a steam exhaust pipe, and the balance cabin is communicated with a breathing pipe; the cabin dividing partition plate enables the working cabin and the balance cabin to be isolated at the upper part and communicated at the bottom;

the exhaust steam absorption water tank is respectively provided with a first interface and a second interface; the first interface is connected with a steam exhaust pipe, the second interface is connected with a respiratory tube, intermittent steam exhaust enters the exhaust steam absorption water tank through the steam exhaust pipe, and the respiratory tube is communicated with the atmosphere.

As a further scheme, the steam exhaust pipe is connected from the top, the side or the bottom of the exhaust steam absorption water tank;

when the steam exhaust pipe is connected from the top of the exhaust steam absorption water tank, the steam exhaust pipe stretches into the position below the liquid level of the working cabin of the exhaust steam absorption water tank, and the tail end position of the steam exhaust pipe is higher than the position where the working cabin and the balance cabin are communicated; or the steam exhaust pipe extends out of the position above the liquid level of the exhaust steam absorption water tank; the connecting position of the steam exhaust pipe and the first connector is a water seal structure with a set shape;

Or when the steam exhaust pipe is connected from the bottom of the exhaust steam absorption water tank, the steam exhaust pipe stretches into the position below the liquid level of the working cabin of the exhaust steam absorption water tank, and the tail end position of the steam exhaust pipe is higher than the position where the working cabin and the balance cabin are communicated; the connecting position of the steam exhaust pipe and the first connector is a water seal structure with a set shape;

or when the steam exhaust pipe is connected from the bottom of the exhaust steam absorption water tank, the steam exhaust pipe extends out of the position above the liquid level of the exhaust steam absorption water tank to form a self-water-sealing structure;

further, a plurality of through holes are formed in the set positions on the pipe wall of the exhaust pipe, when the exhaust pipe extends below the liquid level of the working cabin of the exhaust absorption water tank, part of exhaust steam exchanges heat with liquid in the exhaust absorption water tank and condenses, part of exhaust steam is discharged to a gas phase space above the liquid level through the through holes, and accordingly, unsmooth exhaust steam caused by pressure build-up in the exhaust pipe is prevented.

According to a third aspect of the present invention, the following technical solution is disclosed:

an intermittent exhaust steam recovery system for heat medium conduit drain water, comprising: the drainage concentration funnel is connected with the heat medium pipeline and is connected with the exhaust steam absorption device through a steam exhaust pipe; the exhaust steam absorbing device is higher than the water drainage concentration funnel.

As a further scheme, a first baffle plate is arranged at the upper part of the drainage concentration funnel, a plurality of breathing holes are formed in the first baffle plate, and the breathing holes are used for enabling the inside of the drainage concentration funnel to be communicated with the outside atmosphere;

or,

the upper part of the drainage centralized funnel is provided with a first baffle plate, and a plurality of breathing holes are formed in the first baffle plate; a second baffle is arranged on the first baffle and can rotate or slide relative to the first baffle; when the second partition board is positioned at the first position, the breathing holes can be completely opened; when the second partition board is positioned at the second position, the breathing holes can be completely blocked and incompletely closed by the second partition board; when the second partition board is positioned between the first position and the second position, the breathing holes can be incompletely blocked by the second partition board.

According to a fourth aspect of the present invention, the following technical solution is disclosed:

an intermittent exhaust steam recovery system for heat medium conduit drain water, comprising: the drainage expansion container is connected with the heat medium pipeline and is connected with the exhaust steam absorption device through a steam exhaust pipe; the position of the exhaust steam absorbing device is higher than that of the drainage expansion container.

As a further scheme, a temperature detection device and a liquid level detection device are arranged in the exhaust steam absorption water tank, and the top of the exhaust steam absorption water tank is connected with a cold water mixing pipeline;

the exhaust steam absorption water tank is connected with the hot water recovery device through a hot water recovery pipeline; or the exhaust steam absorption water tank is connected with a drainage water concentration funnel or a drainage expansion container through a hot water recovery pipeline;

further, the hot water recovery pipe comprises a vent pipe and/or an overflow pipe.

As a further scheme, a plurality of sections of cooling devices are arranged on the steam exhaust pipe, each section of cooling device is of a double-sleeve structure, and a cavity is formed between the inner sleeve and the outer sleeve;

further, a plurality of ribs are arranged on the inner sleeve of each section of double-sleeve structure according to the principle of upper thinning and lower thinning.

According to a fifth aspect of the present invention, the following technical solution is disclosed:

an intermittent exhaust steam recovery method of heat medium pipeline drain water based on the exhaust steam absorption device is characterized by comprising the following steps:

intermittent exhaust steam generated in the drainage concentration funnel or the drainage expansion container of the heat medium pipeline by drainage water enters the exhaust steam absorption device through the exhaust steam pipe;

The water vapor in the intermittent exhaust steam is cooled and condensed and adsorbed in the liquid water, and the non-condensed gas in the intermittent exhaust steam is exhausted into the atmosphere through the breathing tube.

According to a sixth aspect of the present invention, the following technical solution is disclosed:

intermittent exhaust steam generated in the drainage concentration funnel or the drainage expansion container of the heat medium pipeline enters a working cabin of the exhaust steam absorption device through the exhaust steam pipe;

the water vapor in the intermittent exhaust steam is cooled and condensed and adsorbed in the liquid water, and the non-condensed gas in the intermittent exhaust steam enters a gas phase space above the liquid level of the working cabin; along with the increase of non-condensable gas in the space, the pressure in the working cabin is increased, and then the water in the working cabin flows to the balance cabin to form a water seal; when the water seal height exceeds the set height, uncondensed gas in the gas phase space or vapor carried by the uncondensed gas and not condensed yet can enter the balance cabin and be discharged into the atmosphere through the breathing tube, so that automatic pressure relief is realized.

As a further scheme, the method further comprises the following steps:

the steam exhaust pipe is connected to the bottom of the exhaust steam absorption water tank, and forms a self-water-sealing structure when the steam exhaust pipe extends out of the position above the liquid level of the exhaust steam absorption water tank;

when the liquid level in the exhaust steam absorption water tank exceeds a set first threshold value, the exhaust steam pipe is also used as a hot water recovery branch pipe;

when the liquid level in the exhaust steam absorption water tank exceeds a set second threshold value, starting a liquid level alarm, and draining water outwards through the hot water recovery pipeline until the liquid level in the exhaust steam absorption water tank meets the set requirement.

Compared with the prior art, the invention has the beneficial effects that:

(1) The passive exhaust steam absorbing device for recycling intermittent exhaust steam is characterized in that exhaust steam in the drainage water centralized recycling device is absorbed and utilized through the exhaust steam absorbing device arranged at a higher position, the scheme is simple, the cost is low, the implementation is easy, gaseous water working medium in exhaust steam can be recycled through condensation, and the recycling can be realized through temperature monitoring after condensation heat is absorbed by water in the exhaust steam absorbing device.

(2) The passive exhaust steam absorption device for recycling intermittent exhaust steam is characterized in that a baffle plate is arranged in the exhaust steam absorption water tank, the exhaust steam absorption water tank is divided into a working cabin and a balance cabin, automatic pressure relief of the exhaust steam absorption water tank can be realized through a pressure self-balancing principle, and overpressure explosion is prevented.

(3) According to the invention, a passive design concept is adopted, and compared with the traditional technologies such as spraying or venturi ejectors, rotation equipment such as pumps and fans are not needed, components which are easy to damage such as spray nozzles, venturi tubes, complex valves and controllers thereof are not needed, and the start and stop of the pumps or fans are not needed to be controlled frequently, so that the intermittent exhaust steam can be automatically recovered, the energy consumption of exhaust steam recovery is reduced to the greatest extent, and the method is particularly suitable for popularization and application in the field of low-energy-density water-steam two-phase recovery represented by intermittent drainage and exhaust steam recovery.

(4) The exhaust steam absorbing device can adopt non-toxic and non-corrosive liquid water as a liquid adsorbent for cooling and condensing exhaust steam into liquid water and adsorbing the condensed liquid water; the equipment investment is low, the operation and maintenance cost is low, and the operation process is safe and reliable.

(5) On the system level, each component can be flexibly combined, and the system is suitable for various scenes with more or less water drainage quantity; the working conditions can be safely and reliably operated.

(6) By recycling the hydraulic medium in the exhaust steam and the heat carried by the hydraulic medium, the drainage and near zero running of the exhaust steam are realized, and the operation economy of the whole plant makeup water system and the thermodynamic system is improved to a greater extent.

Additional features and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIGS. 1 (a) - (c) are schematic diagrams of exhaust steam absorption tanks without baffles in the embodiments of the present invention, respectively;

FIGS. 2 (a) - (g) are schematic diagrams of exhaust steam absorption water tanks with partition plates according to embodiments of the present invention;

FIGS. 3 (a) - (c) are schematic views of openings of the partition walls, respectively;

FIG. 4 is a schematic view of a vent opening in an embodiment of the present invention;

FIGS. 5 (a) - (b) are schematic structural views of intermittent exhaust steam recovery systems for dredging water based on heat medium pipelines of dredging water concentration funnels in the embodiment of the invention;

FIG. 6 is a schematic diagram of an intermittent exhaust steam recovery system of the heat medium pipeline drain water with a self-water seal structure based on a drain water concentration funnel in the embodiment of the invention;

FIG. 7 is a schematic view of a hot water recovery pipeline according to an embodiment of the present invention;

FIGS. 8 (a) - (b) are front and left views, respectively, of a concentrate funnel structure for draining water in an embodiment of the present invention;

FIGS. 9 (a) - (b) are schematic diagrams illustrating the cooperation of a first separator and a second separator according to embodiments of the present invention;

FIGS. 10 (a) - (b) are schematic diagrams of intermittent steam extraction recovery systems for dredging water from a heat medium pipe based on a hydrophobic expansion vessel according to embodiments of the present invention;

FIGS. 11 (a) - (b) are schematic views of an intermittent steam exhaust recovery system for dredging water from a heat medium pipe with a hot water recovery structure according to an embodiment of the present invention, respectively;

the novel exhaust gas treatment device comprises a gas exhaust pipe, a 1-1 water seal structure, a 1-2 tail end of the gas exhaust pipe, a 2 breathing pipe, a 3 dead steam absorption water tank, a 4 first connector, a 5 second connector, a 6 partition board, a 6-1 working cabin, a 6-2 balance cabin, a 7 communication hole, a 7-1 upper edge of the communication hole, an 8 elbow, a 9 opening, a 10 through hole, a 11-1 water drainage concentration funnel, a 11-1 first partition board, a 11-2 dead steam exhaust pipe, a 11-3 second partition board, a 11-4 breathing hole, a 11-5 funnel cover, a 11-6 water drainage pipeline, a gas discharge pipeline, a 11-7 thick diameter water collecting pipe, a 11-8 filter screen, a 11-9 reducing pipe and a 11-10 thin diameter water collecting pipe. 12. The drainage pipe of the drain water concentration funnel, 13, the hot water recovery pipe, 14, the emptying pipe, 15, the overflow pipe, 16, the emptying valve, 17, the drain expansion container, 18, the drainage pipe of the drain expansion container, 19, the cooling device, 20, the hot water recovery main pipe.

Detailed Description

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. 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 application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

Example 1

In one or more embodiments, a passive exhaust steam absorption device for recovering intermittent exhaust steam is disclosed, comprising, in combination with fig. 1 (a) - (c): the exhaust steam absorption water tank 3, the position of the exhaust steam absorption water tank 3 is higher than the position for generating intermittent exhaust steam; the exhaust steam absorption water tank 3 is respectively provided with a first connector 4 and a second connector 5; the first interface 4 is connected with the steam exhaust pipe 1, and the second interface 5 is connected with the breathing pipe 2; intermittent exhaust steam enters the exhaust steam absorption water tank 3 through the exhaust steam pipe 1, one end of the breathing pipe 2 is connected with the second connector 5, and the other end is communicated with the atmosphere.

In this embodiment, when intermittent exhaust steam enters the exhaust steam pipe 1, the intermittent exhaust steam is mixed with air in the exhaust steam pipe 1, so that the gas component in the exhaust steam pipe 1 is a mixture of air and steam, hereinafter referred to as exhaust steam; wherein, the vapor in the exhaust steam belongs to the gas which can be absorbed, and the air in the exhaust steam is non-condensing gas.

Further, the water vapor is a secondary vapor of a thermal hydrophobic flash, and the discharge of the water vapor is intermittent.

In this embodiment, the first connector 4 is located on the top surface or the bottom surface or the side surface of the exhaust steam absorption water tank 3, and fig. 1 (a) - (c) respectively show schematic structural diagrams of the exhaust steam pipe 1 connected to the interior of the exhaust steam absorption water tank 3 from the top surface, the bottom surface and the side surface of the exhaust steam absorption water tank 3; the second connector 5 is positioned on the top surface or the side surface close to the top surface of the exhaust steam absorption water tank 3, and the breathing tube 2 is positioned above the liquid level of the exhaust steam absorption water tank 3.

At this time, the steam exhaust pipe 1 needs to be inserted below the liquid level of the steam exhaust absorption water tank 3, and the closer the tail end 1-2 of the steam exhaust pipe is to the bottom of the steam exhaust absorption device, the better, so as to increase the contact time of the steam exhaust and water in the steam exhaust absorption device. Because if the exhaust pipe 1 is inserted into the gas phase space above the liquid surface, it is easy to cause exhaust steam to flow from the exhaust pipe 1 to the breathing pipe 2 without passing through the absorption action of the liquid typified by water, thereby shorting the water washing process.

As shown in fig. 1 (a), the first connector 4 is located on the top surface of the exhaust steam absorption water tank 3, and at this time, the depth of the exhaust steam pipe 1 inserted into the exhaust steam absorption water tank 3 can affect the exhaust steam absorption effect; when the exhaust steam of the exhaust steam pipe 1 is discharged near the bottom of the exhaust steam absorption water tank 3 as much as possible, the washing effect on the water vapor in the exhaust steam is better. As shown in fig. 1 (b), the first connector 4 is located at the bottom surface of the exhaust steam absorption water tank 3, and the exhaust steam pipe 1 is connected from the bottom of the exhaust steam absorption water tank 3. As shown in fig. 1 (c), the first connector 4 is located at the side of the exhaust steam absorption water tank 3, and the exhaust steam pipe 1 is connected from the side of the exhaust steam absorption water tank 3.

Referring to fig. 1 (a) to (c), the steam exhaust pipe 1 is connected to the first port 4 in a predetermined shape; the set shape can be an L-shaped bent pipe, a U-shaped bent pipe, an inverted U-shaped bent pipe or a transverse S-shaped bent pipe, and the set shape is reasonably determined according to the position of the exhaust steam pipe 1 connected into the exhaust steam absorption water tank 3, for example: when the exhaust steam pipe 1 is connected from the bottom surface of the exhaust steam absorption water tank 3, in order to prevent water in the exhaust steam absorption water tank 3 from flowing downwards due to gravity, the exhaust steam pipe 1 at the inlet section of the exhaust steam absorption water tank 3 is arranged in a transverse S-shaped bent pipe form, so that a water seal structure 1-1 is formed; when the exhaust steam pipe 1 is connected from the top of the exhaust steam absorption water tank 3, the exhaust steam pipe 1 at the inlet section of the exhaust steam absorption water tank 3 is arranged in the form of an inverted U-shaped bent pipe.

In this embodiment, the exhaust steam absorption water tank 3 is a closed water tank, and in a normal operation state, other upper structures of the exhaust steam absorption water tank 3 except the breathing tube 2 are not opened to the atmosphere.

Intermittent exhaust steam enters the exhaust steam absorption water tank 3 through the exhaust steam pipe 1 and is firstly in direct contact with cold water in the exhaust steam absorption water tank 3, so that water vapor with higher temperature in the exhaust steam is condensed, air in the exhaust steam escapes from the water surface and is discharged to the atmosphere through the breathing pipe 2 above the liquid surface.

Example two

In one or more embodiments, a passive exhaust steam absorption device for recovering intermittent exhaust steam is disclosed, comprising: the exhaust steam absorption water tank 3, the position of the exhaust steam absorption water tank 3 is higher than the position for generating intermittent exhaust steam; the exhaust steam absorption water tank 3 is respectively provided with a first connector 4 and a second connector 5; the first interface 4 is connected with the steam exhaust pipe 1, and the second interface 5 is connected with the breathing pipe 2; intermittent exhaust steam enters the exhaust steam absorption water tank 3 through the exhaust steam pipe 1, one end of the breathing pipe 2 is connected with the second connector 5, and the other end is communicated with the atmosphere.

In this embodiment, referring to fig. 2 (a) - (e), at least one vertical partition board 6 is arranged in the exhaust steam absorption water tank 3, the partition board 6 is arranged at a position between the first interface 4 and the second interface 5, and the exhaust steam absorption water tank 3 is divided into a working cabin 6-1 and a balance cabin 6-2 by the partition board 6; wherein, the working cabin 6-1 is communicated with the steam exhaust pipe 1, and the balance cabin 6-2 is communicated with the breathing pipe 2; the working cabin 6-1 is connected with the exhaust pipe 1 and absorbs water vapor in exhaust steam; the purpose of the balancing pod 6-2 is to maintain pressure balance with the atmosphere via the breathing tube 2.

In the embodiment, the working cabin 6-1 and the balance cabin 6-2 are isolated at the upper part and communicated at the bottom through the cabin dividing partition plate 6; the specific implementation mode is as follows:

one end of a partition plate 6 is connected with the top end of the exhaust steam absorption water tank 3, the other end of the partition plate is connected with the bottom end of the exhaust steam absorption water tank 3, a communication hole 7 is formed in the lower portion of the partition plate 6, and the working cabin 6-1 and the balance cabin 6-2 are communicated at the bottom through the communication hole 7; referring to fig. 3 (a) - (c), the shape of the communication hole 7 may be various shapes such as a rectangular hole or a round hole, and a person skilled in the art may set the structure of the communication hole 7 according to actual needs; or one end of the partition plate 6 is connected with the top end of the exhaust steam absorption water tank 3, and the other end of the partition plate 6 is spaced from the bottom end of the exhaust steam absorption water tank 3 by a set distance; the working cabin 6-1 and the balance cabin 6-2 are isolated at the upper part and communicated at the bottom through the cabin dividing plate 6.

In this embodiment, the connection position of the steam exhaust pipe 1 and the first interface 4 is a structure with a set shape; the specific structure is the same as that in the first embodiment, and will not be described in detail here. The exhaust steam absorption water tank 3 is a closed water tank, and is the same as in the first embodiment, and will not be described in detail.

In the embodiment, the steam exhaust pipe 1 can be connected from the top, the side or the bottom of the exhaust steam absorption water tank 3; the exhaust pipe 1 can be inserted below the liquid level of the exhaust steam absorption water tank 3, or can be inserted in a gas phase space above the liquid level of the exhaust steam absorption water tank 3, specifically:

(1) When the steam exhaust pipe 1 is connected from the top of the steam exhaust absorption water tank 3, the steam exhaust pipe 1 stretches into the position below the liquid level of the working cabin 6-1 of the steam exhaust absorption water tank 3, and the tail end position of the steam exhaust pipe 1 is higher than the upper edge 7-1 of a communication hole between the working cabin 6-1 and the balance cabin 6-2; or the steam exhaust pipe 1 extends to a position above the liquid level of the exhaust steam absorption water tank 3;

at this time, the position where the steam exhaust pipe 1 is connected to the first port 4 is a water seal structure of a predetermined shape.

(2) When the steam exhaust pipe 1 is connected from the bottom of the steam exhaust absorption water tank 3, the steam exhaust pipe 1 stretches into the position below the liquid level of the working cabin 6-1 of the steam exhaust absorption water tank 3, and the tail end position of the steam exhaust pipe 1 is higher than the upper edge 7-1 of a communication hole between the working cabin 6-1 and the balance cabin 6-2;

(3) When the steam exhaust pipe 1 is connected to the bottom of the exhaust steam absorption water tank 3, the steam exhaust pipe 1 extends out of the position above the liquid level of the exhaust steam absorption water tank 3 to form a self-water-sealing structure.

As shown in fig. 2 (a), the first connector 4 is located on the top surface of the exhaust steam absorption water tank 3, the exhaust steam pipe 1 is connected from the top of the exhaust steam absorption water tank 3, and the exhaust steam pipe 1 is inserted into the gas phase space above the liquid surface. As shown in fig. 2 (b), the first connector 4 is positioned on the top surface of the exhaust steam absorption water tank 3, the exhaust steam pipe 1 is connected from the top of the exhaust steam absorption water tank 3, the exhaust steam pipe 1 is inserted below the liquid level, and the tail end position of the exhaust steam pipe 1 is higher than the upper edge 7-1 of the communication hole between the working cabin 6-1 and the balance cabin 6-2; as shown in fig. 2 (c) and 2 (d), the first connector 4 is located at the bottom surface of the exhaust steam absorption water tank 3, the exhaust steam pipe 1 is connected from the bottom surface of the exhaust steam absorption water tank 3, the exhaust steam pipe 1 is inserted below the liquid surface, and the tail end position of the exhaust steam pipe 1 is higher than the upper edge 7-1 of the communicating hole between the working cabin 6-1 and the balance cabin 6-2.

It should be specifically noted that fig. 2 (e) shows a schematic diagram in which the first connector 4 is located at the bottom surface of the exhaust steam absorption water tank 3, the exhaust steam pipe 1 is connected from the bottom surface of the exhaust steam absorption water tank 3, and the exhaust steam pipe 1 is inserted into the gas phase space above the liquid surface; at this time, the exhaust steam pipe 1 has a self-sealing function, when the liquid level in the exhaust steam absorption water tank 3 exceeds a set threshold value, the characteristic that the water in the exhaust steam absorption water tank 3 flows downwards due to gravity can be utilized, so that the exhaust steam pipe 1 also serves as a hot water recovery branch pipe (namely, the hot water in the exhaust steam absorption water tank 3 flows into a device (a drainage expansion container 17 or a drainage concentration funnel 11) for generating intermittent exhaust steam from the exhaust steam pipe 1).

As a further embodiment, referring to fig. 2 (f), the exhaust steam pipe 1 is provided with an elbow 8 at a position above the liquid surface of the exhaust steam absorption water tank 3; as a further embodiment, referring to fig. 2 (g), an opening 9 is provided at the top of the elbow 8. Wherein, the elbow 8 can guide the steam to contact with the liquid surface, so as to improve the condensing effect of the steam; the open hole 9 at the top of the elbow 8 enables exhaust steam to be discharged outwards from the tail end 1-2 of the steam exhaust pipe or from a hole at the top of the elbow; therefore, part of exhaust steam can be guided to the vicinity of the liquid level through the bent pipe, the steam condensation effect is improved, part of exhaust steam can be rapidly discharged to a gas phase space above the liquid level through a hole at the top of the bent pipe, and unsmooth steam discharge caused by pressure build-up in the steam discharge pipe 1 is prevented.

Intermittent exhaust steam is connected into a working cabin 6-1 of the exhaust steam absorption water tank 3 through a steam exhaust pipe 1, and the exhaust steam is absorbed by utilizing cold stored water in the water tank. When the proportion of the vapor in the dead steam in the working cabin 6-1 is not as high as that of the liquefied vapor or the uncondensed gases such as the air in the dead steam is high, or the quantity of the uncondensed gases such as the air in the gas phase space above the liquid level in the working cabin 6-1 and below the top of the water tank is large enough, the pressure in the working cabin 6-1 can be increased, so that the water is pressed to flow to the balance cabin 6-2 to form a water seal; when the water seal height exceeds the set height, non-condensable gases such as air in a gas phase space above the liquid level in the working cabin 6-1 and below the top of the water tank or vapor which is carried by the non-condensable gases and has not been condensed yet in a very small part can enter the balance cabin 6-2 through the communication hole 7, and then is discharged into the atmosphere through the breathing tube 2, overpressure explosion is prevented through automatic pressure relief, and the safety of equipment and pipelines is ensured.

As an alternative embodiment, referring to fig. 4, a plurality of through holes 10 are provided on the wall of the steam exhaust pipe 1 inserted into the steam exhaust absorption water tank 3, and the steam exhaust can be discharged from the tail end 1-2 of the steam exhaust pipe or discharged from the through holes 10 on the wall of the steam exhaust pipe. Therefore, when the exhaust steam pipe 1 stretches into the position below the liquid surface of the working cabin 6-1 of the exhaust steam absorption water tank 3, part of exhaust steam can be quickly condensed after being fully heat-exchanged in a mode of being contacted with liquid water, part of exhaust steam can be quickly discharged to a gas phase space above the liquid surface through holes in the pipe wall above the liquid surface, and the unsmooth exhaust steam caused by pressure holding in the exhaust steam pipe 1 is prevented.

Example III

In one or more embodiments, an intermittent exhaust steam recovery system of heat medium pipe drain is disclosed, the recovery system comprising a heat medium pipe, a recovery device of heat medium pipe drain, and a passive exhaust steam absorption device for recovering intermittent exhaust steam in embodiment one or embodiment two.

Wherein the heat medium pipe includes but is not limited to a steam pipe or a hot water pipe; the recovery device of the heat medium pipeline drain water comprises a fixed-row expansion vessel, an atmospheric drain expansion vessel, a low-pressure steam header or a concentration funnel for drain water and the like.

According to the volume of the container, the recycling device of the heat medium pipeline drain water is divided into two main types, namely a drain water concentration funnel 11 and a drain expansion container 17. The hydrophobic expansion vessel 17 comprises a fixed-row expansion vessel, an atmospheric hydrophobic expansion vessel, a low-pressure steam header and the like, and has larger volume, and is generally more than or equal to 0.3 cubic meter; the drainage connectors of the drainage expansion container 17 are small in number, but the pipe diameter of each drainage pipeline is thicker, so that the drainage connectors reach the national standard or industry standard of the pressure container in terms of manufacturing and use requirements, and the drainage connectors are prefabricated in factories with pressure container production qualification; the volume of the drain water concentration funnel 11 is smaller and is generally smaller than 0.3 cubic meter, the number of drain water connectors of the concentration funnel is large, the pipe diameter of each drain water pipeline is smaller, the requirements of manufacturing and using cannot meet the national standard or the industry standard of the pressure vessel, and the drain water concentration funnel can be manufactured and processed on a construction site.

In this embodiment, the drain concentration hopper 11 is used as a heat medium pipe drain recovery device.

Specifically, in connection with fig. 5 (a) - (b), an intermittent exhaust steam recovery system for heat medium conduit drain water, comprising: the drain water concentration funnel 11, the exhaust steam absorbing device described in the first or second embodiment and the auxiliary pipeline. Wherein the auxiliary pipelines comprise a cooling water supplementing pipeline of the exhaust steam absorbing device, a venting pipeline 14 and/or a overflow pipeline 15 of the exhaust steam absorbing device, a drainage pipeline 12 of a drainage concentration funnel and the like.

The drainage water concentration funnel 11 is connected with a heat medium pipeline, the drainage water concentration funnel 11 is provided with a waste steam discharge interface, the drainage water concentration funnel is connected with a waste steam pipe 1 through the waste steam discharge interface, and the waste steam pipe 1 is connected with a waste steam absorbing device.

To prevent the exhaust pipe 1 from vacuum (or negative pressure) and thus possibly cause liquid water to flow from the drainage concentration funnel 11 to the exhaust steam absorbing device, the exhaust steam absorbing device is arranged at a position higher than the drainage concentration funnel 11; thus, even if a certain range of vacuum (or called negative pressure) occurs in the steam exhaust pipe 1, the flow direction of the liquid water can only flow unidirectionally from the exhaust steam absorbing device to the drain water concentration funnel 11.

In the embodiment, the exhaust steam absorbing device can select the exhaust steam absorbing water tank 3 in the first embodiment, and the partition plate 6 is not arranged in the exhaust steam absorbing water tank 3; the exhaust steam absorbing device can also select the exhaust steam absorbing water tank 3 in the second embodiment, and a partition plate 6 is arranged in the exhaust steam absorbing water tank 3. The specific operation of the exhaust steam absorption tank 3 in the above two modes has been described in the first and second embodiments, and will not be described in detail here.

Referring to fig. 5 (a) - (b), when the steam exhaust pipe 1 is connected from the bottom of the exhaust steam absorbing device and does not extend above the liquid level, the connection position of the steam exhaust pipe 1 and the first connector 4 is a transverse S-shaped bent pipe, so that a water seal structure can be formed; when the exhaust steam pipe 1 is connected from the top of the exhaust steam absorbing device, the connection position of the exhaust steam pipe 1 and the first connector 4 is an inverted U-shaped bent pipe.

And under the condition that the partition plate 6 is arranged in the exhaust steam absorbing device, when the exhaust steam pipe 1 is connected in from the bottom of the exhaust steam absorbing device and stretches out of the liquid level, the exhaust steam pipe 1 can form a self-water-sealing structure in the exhaust steam absorbing water tank 3.

Based on this, as a preferred embodiment, with reference to fig. 6, at least one drainage concentration funnel 11 is connected with the exhaust steam absorption water tank 3 through the exhaust steam pipe 1, the exhaust steam absorption water tank 3 is divided into a working cabin 6-1 and a balance cabin 6-2 by a partition plate 6, and all the exhaust steam pipes 1 are connected into the working cabin 6-1 from the bottom of the exhaust steam absorption water tank 3 and extend above the liquid level; at this time, each steam exhaust pipe 1 forms a self-sealing structure in the exhaust steam absorption water tank 3.

A temperature detection point and a liquid level detection device are arranged in the exhaust steam absorption water tank 3, and the top of the exhaust steam absorption water tank 3 is connected with a cold water mixing pipeline; the bottom of the exhaust steam absorption water tank 3 is connected with a hot water recovery device through a hot water recovery pipeline 13; wherein, the hot water recovery device can select a condenser hot well;

when the thermal state drain water continuously enters the drain water concentration funnel 11 for a certain time, the water temperature in the exhaust steam absorption water tank 3 can be gradually increased, and the cooling adsorption capacity of water vapor in the exhaust steam is reduced, so that through temperature monitoring, when the temperature reaches a set temperature value, hot water is released to a hot water recovery device through a hot water recovery pipeline 13, a valve on a cold water mixing pipeline is opened, cold water mixing is injected into the exhaust steam absorption water tank 3, water quantity is supplemented on one hand, and the water temperature in the exhaust steam absorption water tank 3 is reduced on the other hand.

For monitoring the liquid level, when the liquid level in the exhaust steam absorption water tank 3 exceeds a set first threshold value, the characteristic that water in the exhaust steam absorption water tank 3 flows downwards under the gravity can be utilized, so that the exhaust steam pipe 1 can also serve as a hot water recovery branch pipe; when the liquid level in the exhaust steam absorption water tank 3 exceeds a set second threshold value, a liquid level alarm is started, and water is discharged to the hot water recovery device through the hot water recovery pipeline 13 until the liquid level in the exhaust steam absorption water tank 3 meets the set requirement.

Wherein, in combination with fig. 7, the hot water recovery pipeline can only include the blowdown pipeline 14, and blowdown pipeline 14 is connected with the bottom of exhaust steam absorption water tank 3, sets up the blowdown valve 16 on the blowdown pipeline 14, and the valve is closed under the normal condition, and the control valve is opened when needing the drainage. In some embodiments, the hot water recovery pipeline can also only comprise an overflow pipeline 15, wherein the overflow pipeline 15 is connected to a set height on the side surface of the exhaust steam absorption water tank 3, and when the liquid level exceeds the height, the liquid level automatically overflows to the hot water recovery device. Of course, the vent pipe 14 and the overflow pipe 15 may be simultaneously provided as required, and the vent pipe 14 and the overflow pipe 15 are merged into the main hot water recovery pipe 20 and then enter the hot water recovery device through the main hot water recovery pipe 20; in addition, when the steam exhaust pipe 1 also serves as a hot water recovery branch pipe, the steam exhaust pipe 1 also belongs to a hot water recovery pipeline at this time.

In summary, the vent line 14, the overflow line 15, the hot water recovery branch line and the main drain line all belong to the hot water recovery line.

In this embodiment, the drainage concentration funnel 11 is composed of a concentration funnel, a plurality of drainage pipeline interfaces, a deflation pipeline interface and a waste steam discharge interface. The drainage pipeline interface and the deflation pipeline interface are respectively connected with the drainage pipeline and the deflation pipeline 11-6. The exhaust steam discharge interface is connected with a steam discharge pipe 1.

Alternatively, the drainage collecting funnel 11 may adopt a structure of a collecting funnel described in patent ZL 201720034509.7;

the drainage concentration funnel 11 may also be configured as shown in fig. 8 (a) and 8 (b), and specifically includes: the funnel comprises a thick diameter water collecting pipe 11-7 of a funnel, a reducing pipe 11-9 of the funnel, a thin diameter water collecting pipe 11-10 of the funnel and a funnel outflow pipe which are connected in sequence, wherein a funnel filter screen 11-8 is arranged at the intersection of the thick diameter water collecting pipe 11-7 of the funnel and the reducing pipe 11-9 of the funnel, a plurality of interfaces are arranged on the side wall of the thick diameter water collecting pipe 11-7, one interface is communicated with a steam exhaust pipe 1, other interfaces can be connected with a drainage pipeline, a deflation pipeline and the like, and the top of the thick diameter water collecting pipe 11-7 of the funnel is covered by a funnel cover 11-5.

In order to avoid the problem of exhaust steam running, a first baffle plate 11-1 is arranged at the upper end close to the large-diameter water collecting pipe 11-7, a plurality of breathing holes 11-4 are arranged on the first baffle plate 11-1, and the breathing holes 11-4 can be round holes, elliptical holes, strip-shaped holes, star-shaped holes or crescent holes or holes with various shapes are mixed for use. The breathing holes 11-4 are used for communicating gas at two sides of the first baffle plate 11-1 when the pressure generated in the processes of dewatering, releasing air and flash evaporation in the large-diameter water collecting pipe 11-7 is unbalanced with the atmospheric pressure.

As a specific implementation mode, the large-diameter water collecting pipe 11-7 is divided into an upper part and a lower part, and the upper half part of the large-diameter water collecting pipe 11-7 is connected with the counter flange of the lower half part through a flange; the first baffle is positioned between the flange and the counter flange, and the first baffle is fixed by bolts between the flange and the counter flange.

In a specific embodiment, the first partition 11-1 is made of a transparent or semitransparent heat-resistant material and serves as an observation window.

As a further embodiment, in combination with fig. 9 (a) and 9 (b), a second partition 11-3 may be further provided above the first partition 11-1; the second partition board 11-3 is placed on the first partition board 11-1 by self gravity, and a connecting mode is not arranged, so that the second partition board 11-3 can freely rotate or slide relative to the first partition board 11-1; alternatively, the second partition 11-3 is connected to the first partition 11-1 by a rotation shaft, and can rotate with respect to the first partition 11-1. The second partition 11-3 is in the first position, so that the breathing hole 11-4 is completely opened; when the second partition 11-3 is in the second position, the breathing hole 11-4 can be completely blocked and incompletely closed by the second partition 11-3; the second partition 11-3 is positioned between the first position and the second position such that the breathing hole 11-4 is incompletely blocked by the second partition 11-3.

The communication area between the inside and the outside of the funnel can be adjusted by adjusting the opening or closing degree of the second partition 11-3; such as: when the second partition 11-3 is fully opened, the breathing holes 11-4 of the first partition 11-1 are fully opened; when the second partition 11-3 is completely closed, the breathing hole 11-4 of the first partition 11-1 is blocked by the second partition 11-3 and is incompletely sealed, and because of the incompletely sealed, the breathing hole 11-4 can still be opened to the atmosphere without causing overpressure explosion of the funnel, but most of exhaust steam can be blocked in the funnel by the composite partition consisting of the first partition 11-1 and the second partition 11-3 or further guided to the steam exhaust pipe 1, so that random running and overflowing cannot be caused in a main workshop.

As an alternative embodiment, the steam exhaust pipe 1 is provided with a plurality of sections of cooling devices 19, each section of cooling device 19 has a double-sleeve structure, and a cavity is formed between the inner sleeve and the outer sleeve; wherein the cooling device 19 with each section of double-sleeve structure can form a chimney effect for cooling in sections; in this embodiment, a cavity is formed between the inner sleeve and the outer sleeve; typically, the height of the exhaust pipe 1 is high enough to create a large suction force. From the angle of the temperature field, the bottom wall temperature of the inner sleeve is higher, so that the bottom air temperature of the gas column in the cavity is higher, the top air temperature is lower, and natural convection is facilitated. After natural convection is established, the air in the cavity cools the steam in the inner sleeve.

Compared with a double-sleeve structure with a long section, the embodiment is provided with a multi-section cooling device 19, which has more inlet sections, and the turbulence ratio is more in the convection state in the cavity between the inner sleeve and the outer sleeve and the heat exchange effect is better because of the more inlet sections according to the inlet effect of the convection heat exchange in the pipe groove; as a further implementation mode, for each section of double-sleeve structure, a plurality of ribs are arranged on the inner sleeve according to the principle of dense and sparse downwards, so that more heat dissipation is realized at the place with high wall temperature of the inner sleeve at the lower part, the temperature of hot air at the bottom is higher through heat conduction and local convection, and the heat dissipation is realized at the upper part; the air temperature at the upper part is lower, so that density difference is easier to induce and form, and further, large-range air convection in the cavity is induced and the exhaust steam is cooled through convection heat exchange.

Example IV

In connection with the explanation of the heat medium pipe and the recovery device of the heat medium pipe drain water in the third embodiment, this embodiment will be described taking the drain expansion tank 17 as an example of the recovery device of the heat medium pipe drain water.

Referring to fig. 10 (a) - (b), an intermittent exhaust steam recovery system for heat medium pipe drain water specifically includes: the steam exhaust absorption device and the auxiliary pipeline in the drainage expansion container 17, the first embodiment or the second embodiment are arranged, the drainage expansion container 17 is connected with the heat medium pipeline, the drainage expansion container 17 is provided with a steam exhaust emission interface, the steam exhaust expansion container is connected with the steam exhaust pipe 1 through the steam exhaust emission interface, and the steam exhaust pipe 1 is connected with the steam exhaust absorption device. The auxiliary pipelines comprise a cooling water supplementing pipeline of the exhaust steam absorbing device, a hot water recovery pipeline 13 of the exhaust steam absorbing device, a drainage pipeline 18 of the drainage expansion container, a cooling-doped cooling water pipeline and the like.

Based on the same principle as in implementation three, the position of the exhaust steam absorbing device is higher than that of the hydrophobic expansion vessel 17. The exhaust steam absorption water tank 3 can be provided with a partition plate 6 or not provided with the partition plate 6.

In this embodiment, the drainage expansion vessel 17 is composed of a large-sized vessel, a plurality of drainage pipeline interfaces, a deflation pipeline interface and a waste steam discharge interface. The drain pipeline interface and the air discharge pipeline interface are respectively connected with the drain pipeline and the air discharge pipeline 11-6, and the exhaust steam discharge interface is connected with the exhaust steam pipe 1.

In this embodiment, when the exhaust steam absorbing device is connected from the top of the exhaust steam absorbing device, the connection position of the exhaust steam pipe 1 and the first interface 4 is an inverted U-shaped bent pipe, as shown in fig. 10 (a); when the exhaust steam absorbing device is connected from the bottom of the exhaust steam absorbing device and does not extend out of the liquid level, the connecting position of the exhaust steam pipe 1 and the first connector 4 is a transverse S-shaped bent pipe, and a water seal structure can be formed, as shown in fig. 10 (b).

As an alternative implementation manner, referring to fig. 11 (a) - (b), a temperature detection point and a liquid level detection device are arranged in the exhaust steam absorption water tank 3, and the top of the exhaust steam absorption water tank 3 is connected with a cold water mixing pipeline; the exhaust steam absorption water tank 3 is connected with a hot water recovery device through a hot water recovery pipeline 13; the hot water recovery device may be a condenser heat well as shown in fig. 11 (a), or a hydrophobic expansion vessel 17, that is, the bottom of the exhaust steam absorption water tank 3 is connected with the hydrophobic expansion vessel 17 through a hot water recovery pipeline 13 as shown in fig. 11 (b).

As in the three-phase embodiment, the hot water recovery pipeline 13 may include only the vent pipeline 14, may include only the overflow pipeline 15, and may also include both the vent pipeline 14 and the overflow pipeline 15;

of course, when the exhaust steam absorption water tank 3 is provided with the partition plate 6, the intermittent exhaust steam recovery system of the heat medium pipeline drain water of the embodiment can also be designed into a structure form that at least one drain expansion container 17 is connected with the working cabin 6-1 of the exhaust steam absorption water tank 3 through the exhaust steam pipe 1; the steam exhaust pipe 1 is connected to the bottom of the exhaust steam absorption water tank 3 in the same way as in the third embodiment, and when the top end of the steam exhaust pipe 1 extends out of the liquid level, a self-water seal structure is formed, and the steam exhaust pipe 1 can be used as a hot water recovery branch pipe at the moment; the specific operation and the liquid level monitoring method are described in detail in the third embodiment, and will not be described in detail here.

As an alternative embodiment, the steam exhaust pipe 1 is provided with a multi-stage cooling device 19, and the specific structure is the same as that of the third embodiment, and will not be described in detail.

Example five

In one or more embodiments, a method for recovering intermittent exhaust steam of heat medium pipeline drain water is disclosed, and the method is based on the intermittent exhaust steam recovery system of heat medium pipeline drain water in the third embodiment or the fourth embodiment, and specifically comprises the following steps:

(1) The dredged water of the heat medium pipeline is connected to a recovery device of the dredged water of the heat medium pipeline through the dredged water pipeline; when the amount of the discharged water is small, the heat medium pipeline discharged water recovery device adopts a discharged water concentration funnel 11; when the amount of the drained water is large, the device for recycling the drained water of the heat medium pipeline adopts the drainage expansion container 17.

(2) The drain water of the heat medium pipeline is subjected to physical process of flash evaporation due to pressure dip in the drain water concentration funnel 11 or the drain flash container 17, so that a large amount of gaseous secondary steam is generated by liquid drain water. The flash secondary steam is mixed with the air in the steam exhaust pipe 1 to become "exhaust steam", and conventionally, exhaust steam is also called intermittent exhaust steam because the exhaust of the exhaust water is intermittent and the total amount of the thermal state exhaust water discharged from the plurality of exhaust water pipes is randomly varied.

(3) The density of the exhaust steam is lower, and the exhaust steam is upwards connected with the exhaust steam absorbing device along the exhaust steam pipe 1.

Further, when the double-sleeve cooling structure exists on the steam exhaust pipe 1, the steam exhaust flows in the steam exhaust pipe 1 from bottom to top, passive natural convection cooling is performed through the multi-section double-sleeve cooling structure of the steam exhaust pipe 1, and the steam exhaust completes the physical process of cooling and dehumidifying in the steam exhaust pipe 1.

(4) The water vapor in the exhaust steam is cooled and condensed in the exhaust steam absorbing device, and the non-condensed gases such as air in the exhaust steam are finally discharged to the atmosphere, specifically as follows:

1) When the exhaust steam absorbing device in the first embodiment is adopted, the partition plate 6 is not arranged in the exhaust steam absorbing device, the steam exhaust pipe 1 is inserted below the liquid level of the exhaust steam absorbing device, water vapor in the exhaust steam is cooled and condensed and adsorbed in liquid water after contacting with water below the liquid level in the exhaust steam absorbing device, non-condensed gases such as air in the exhaust steam pass through a water layer in the exhaust steam absorbing device and escape into a gas phase space above the liquid level, and then are communicated with the atmosphere through a unique outlet, namely the breathing pipe 2, and finally the non-condensed gases such as air in the exhaust steam are discharged to the atmosphere through the breathing pipe 2.

2) When the exhaust steam absorbing device in the second embodiment is adopted, a cabin dividing baffle plate 6 is arranged in the exhaust steam absorbing device; two cases were included at this time:

(1) the exhaust pipe 1 is inserted below the liquid level of the working cabin 6-1 of the exhaust steam absorbing device;

vapor in the dead steam is cooled and condensed and adsorbed in liquid water after contacting with water below the liquid level in the dead steam absorbing device, and non-condensed gases such as air in the dead steam pass through a water layer in the dead steam absorbing device and escape to a gas phase space above the liquid level of the working cabin 6-1, so that when the quantity of the non-condensed gases such as air accumulated in the gas phase space above the liquid level in the working cabin 6-1 and below the top of a water tank is large enough, the pressure in the working cabin 6-1 is increased, and then water in the working cabin 6-1 is pressurized and flows to the balance cabin 6-2 to form a water seal, and as the air pressure in the working cabin 6-1 is gradually increased, when the water seal height exceeds a set height (namely, the liquid level in the working cabin 6-1 reaches the lower edge of the partition 6, namely the upper edge 7-1 of a connecting hole), the non-condensed gases such as air in the gas phase space above the liquid level in the working cabin 6-1 and below the top of the water tank and the non-condensed gases carry a small amount of vapor which is not yet available, enter the balance cabin 6-2 through the connecting hole 7, and the safety vent system is realized, and the safety vent system is further realized.

Wherein, the set height is a critical condition, specifically, it is: when the liquid level in the working cabin 6-1 is level with the upper edge 7-1 of the communication hole of the partition plate 6, the non-condensable gas in the working cabin 6-1 has critical conditions for entering the balance cabin 6-2; when the air pressure in the working chamber 6-1 is further increased, the water seal height between the balance chamber 6-2 and the working chamber 6-1 exceeds the set height, and the non-condensable gas enters the balance chamber 6-2.

(2) The exhaust pipe 1 is inserted into a gas phase space above the liquid surface of the working cabin 6-1 of the exhaust steam absorbing device;

vapor in the dead steam is contacted with liquid water on the liquid surface of the working cabin 6-1 so as to be condensed and adsorbed, non-condensed gases such as air in the dead steam are continuously accumulated in a gas phase space above the liquid surface of the working cabin 6-1 in the dead steam absorbing device, and when the quantity of the non-condensed gases such as the gradually accumulated air in the gas phase space above the liquid surface and below the top of the water tank in the working cabin 6-1 is large enough, the pressure in the working cabin 6-1 is increased, the water in the working cabin 6-1 is pressurized and flows to the balance cabin 6-2 so as to form a water seal, and as the air pressure in the working cabin 6-1 is gradually increased, when the water seal height exceeds a set height (namely, the liquid surface in the working cabin 6-1 reaches the lower edge of the partition plate 6 and the upper edge of the communication hole 7), the dead steam or the non-condensed gases such as the air in the gas phase space above the liquid surface and below the top of the water tank in the working cabin 6-1 carry a small part of the non-condensed gases which are not yet entered into the balance cabin 6-2, and then the pressure relief system is automatically discharged into the atmosphere through the breathing pipe 2, so that safe operation is realized.

(5) When the hot drain water enters the drain water collecting funnel 11 or the drain expansion container 17 for a certain period of time, the non-condensable gases such as air in the steam exhaust pipe 1 are gradually exhausted to the atmosphere.

After the thermal state drainage water enters the recovery device of the thermal medium pipeline drainage water for a certain period of time, when the thermal state drainage water suddenly stops entering the recovery device of the thermal medium pipeline drainage water, short-time negative pressure or vacuum can occur in the steam exhaust pipe 1, and water in the exhaust steam absorption device is reversely absorbed into the steam exhaust pipe 1 through siphon action. Because the exhaust pipe 1 at the inlet section of the exhaust steam absorbing device adopts a transverse S-shaped bent pipe or an inverted U-shaped bent pipe, when the negative pressure is not very high, namely the negative pressure value does not exceed the pressure value generated by the water column of the bent pipe, the exhaust steam absorbing device is insufficient to reversely absorb water of the exhaust steam absorbing device into the recovery device of the heat medium pipeline drain water through the exhaust pipe 1.

(6) Since the recovery device of the heat medium pipe drain water is not completely sealed, the short-time negative pressure or vacuum in the steam exhaust pipe 1 in (5) is gradually relieved when no thermal drain water enters the drain water concentration funnel 11 or the drain expansion container 17 for a continuous period of time. The method comprises the following steps:

1) When the drain water collecting funnel 11 is adopted, because the funnel cover 11-5 is not completely connected with the funnel in a sealing way, air can pass through a gap between the funnel cover 11-5 and a water collecting pipe of the funnel to enter the interior of the funnel and then enter the exhaust steam pipe 1 (or called as exhaust steam discharge pipe 11-2), and then water absorbed into the water sealing structure of the exhaust steam pipe 1 returns to the exhaust steam recovery device again.

2) When the hydrophobic capacity-expansion container 17 is adopted, since the safety valve is arranged on the hydrophobic capacity-expansion container 17, and the steam exhaust pipe 1 is communicated with the gas phase space of the hydrophobic capacity-expansion container 17, when the negative pressure in the steam exhaust pipe 1 reaches the opening set value of the safety valve, the safety valve of the hydrophobic capacity-expansion container 17 is opened, so that the air in the atmosphere is absorbed into the gas phase space of the hydrophobic capacity-expansion container 17, and the water absorbed into the water seal structure of the steam exhaust pipe 1 returns to the exhaust steam recovery device again.

As an alternative implementation mode, when water in the exhaust steam absorbing device is absorbed into the exhaust steam pipe 1 due to siphoning, but air cannot enter the gas phase space of the recovery device of the heat medium pipeline drainage water through a gap between the funnel cover 11-5 and the funnel or a safety valve of the drainage expansion large container at a later time, a standby mode can be adopted, namely, the water in the exhaust steam absorbing device is firstly exhausted through the hot water recovery pipeline 13 of the exhaust steam absorbing device, and then the water is re-injected into the exhaust steam absorbing device through a cold water mixing pipeline of the exhaust steam absorbing device.

(7) The exhaust steam absorbing device is provided with an auxiliary pipeline, and the auxiliary pipeline comprises a cooling water supplementing pipeline of the exhaust steam absorbing device, a venting pipeline 14 and/or an overflow pipeline 15 of the exhaust steam absorbing device and the like. After the thermal state drain water enters the recovery device of the heat medium pipeline drain water for a certain time continuously, the water temperature in the exhaust steam absorption water tank 3 can be gradually increased, the cooling adsorption capacity of water vapor in the exhaust steam is reduced, so that through temperature monitoring, when the temperature reaches a set temperature value, a valve on the hot water recovery pipeline 13 is opened, hot water is released to the hot water recovery device (such as a condenser hot well or the hot water is directly released to the drain water concentration funnel 11 or the drain water expansion container 17), the valve on the cold water mixing pipeline is opened, cold water is injected into the exhaust steam recovery device, the water quantity is supplemented on one hand, and the water temperature in the exhaust steam recovery device is reduced on the other hand.

Under the condition that the partition plate 6 is arranged in the exhaust steam absorption device, when the exhaust steam pipe 1 is connected from the bottom of the exhaust steam absorption device and extends out of the liquid level, the exhaust steam pipe 1 can form a self-water-sealing structure in the exhaust steam absorption water tank 3; when the liquid level in the exhaust steam absorption water tank 3 exceeds a set first threshold value, the characteristic that water in the exhaust steam absorption water tank 3 flows downwards under gravity can be utilized, so that the exhaust steam pipe 1 can also serve as a hot water recovery branch pipe; when the liquid level in the exhaust steam absorption water tank 3 exceeds a set second threshold value, a liquid level alarm is started, and water is discharged to the hot water recovery device through the hot water recovery pipeline 13 until the liquid level in the exhaust steam absorption water tank 3 meets the set requirement.

While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.

Claims

1. A passive exhaust steam absorption device for recovering intermittent exhaust steam, comprising: a dead steam absorption water tank; the exhaust steam absorption water tank is respectively provided with a first interface and a second interface; the first interface is connected with a steam exhaust pipe, and the second interface is connected with a respiratory tube; intermittent exhaust steam enters the exhaust steam absorption water tank through a steam exhaust pipe, and the respiratory pipe is communicated with the atmosphere.

2. The passive exhaust steam absorption device for recovering intermittent exhaust steam according to claim 1, wherein the exhaust steam pipe is connected from the top, the side or the bottom of the exhaust steam absorption water tank, and extends to a position below the liquid surface of the exhaust steam absorption water tank and close to the bottom of the water tank; the steam exhaust pipe is in a water seal structure with a set shape at the connection position with the first connector.

3. A passive exhaust steam absorption device for recovering intermittent exhaust steam, comprising: a dead steam absorption water tank; the exhaust steam absorption water tank is internally provided with at least one partition board, the partition board divides the exhaust steam absorption water tank into a working cabin and a balance cabin, the working cabin is communicated with a steam exhaust pipe, and the balance cabin is communicated with a breathing pipe; the cabin dividing partition plate enables the working cabin and the balance cabin to be isolated at the upper part and communicated at the bottom;

4. A passive exhaust steam absorption device for recovering intermittent exhaust steam as claimed in claim 3, wherein the exhaust steam pipe is connected from the top, side or bottom of the exhaust steam absorption water tank;

when the steam exhaust pipe is connected from the top of the exhaust steam absorption water tank, the steam exhaust pipe stretches into the position below the liquid level of the working cabin of the exhaust steam absorption water tank, and the tail end position of the steam exhaust pipe is higher than the position where the working cabin and the balance cabin are communicated; or the steam exhaust pipe extends to a position above the liquid level of the exhaust steam absorption water tank; the connecting position of the steam exhaust pipe and the first connector is a water seal structure with a set shape;

5. An intermittent exhaust steam recovery system for heat medium pipe drain water, comprising: the exhaust steam absorbing device comprises a drainage concentration funnel and any one of claims 1-4, wherein the drainage concentration funnel is connected with a heat medium pipeline through a drainage pipeline, and the drainage concentration funnel is connected with the exhaust steam absorbing device through a steam exhaust pipe; the exhaust steam absorbing device is higher than the water drainage concentration funnel.

6. The intermittent exhaust steam recovery system for the dredged water of the heat medium pipeline according to claim 5, wherein a first partition plate is arranged at the upper part of the dredged water concentration funnel, a plurality of breathing holes are formed in the first partition plate, and the breathing holes are used for enabling the inside of the dredged water concentration funnel to be communicated with the outside atmosphere;

or,

7. An intermittent exhaust steam recovery system for heat medium pipe drain water, comprising: the exhaust steam absorbing device comprises a hydrophobic expansion container and any one of claims 1-4, wherein the hydrophobic expansion container is connected with a heat medium pipeline through a drainage pipeline, and the hydrophobic expansion container is connected with the exhaust steam absorbing device through a steam exhaust pipe; the position of the exhaust steam absorbing device is higher than that of the drainage expansion container.

8. The intermittent exhaust steam recovery system for the heat medium pipeline drain water according to claim 5 or 7, wherein a temperature detection device and a liquid level detection device are arranged in the exhaust steam absorption water tank, and the exhaust steam absorption water tank is connected with a cold water mixing pipeline;

9. An intermittent exhaust steam recovery system for heat medium pipeline drain water as claimed in claim 5 or 7, wherein the exhaust steam pipe is provided with a plurality of sections of cooling devices, each section of cooling device is of a double-sleeve structure, and a cavity is formed between the inner sleeve and the outer sleeve;

10. An intermittent exhaust steam recovery method of heat medium pipeline drain water based on the exhaust steam absorption device of claim 1, characterized in that the method comprises the following steps:

11. An intermittent exhaust steam recovery method of heat medium pipeline drain water based on the exhaust steam absorption device of claim 3, characterized in that the method comprises the following steps:

12. A method for intermittent steam recovery of heat medium pipe drain according to claim 10 or 11, further comprising:

The steam exhaust pipe is connected to the bottom of the exhaust steam absorption water tank, and forms a self-water-sealing structure when the steam exhaust pipe extends to a position above the liquid level of the exhaust steam absorption water tank;