CN211097592U

CN211097592U - Flash tower system

Info

Publication number: CN211097592U
Application number: CN201921805128.XU
Authority: CN
Inventors: 王声光; 刘祎; 邓宏卫; 刘毅; 於佳
Original assignee: Wuhan Zhongneng Hengxin Engineering Technology Co ltd
Current assignee: Kuitun Zhongneng New Material Technology Co ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-07-28
Anticipated expiration: 2029-10-24

Abstract

The utility model discloses a flash column system, flash column system includes flash column and falling liquid film reboiler, wherein, the flash column includes the tower body, the tower body comprises condensation zone, gathering layer and the flash layer that top-down communicates the setting in proper order, one side on flash layer is equipped with the introduction port, be equipped with the collection tank in the gathering layer, the collection tank is upwards opened and is used for receiving the gaseous phase condensate that the below export drippage of condensation zone, the collection tank is seted up and is communicated to the appearance mouth that goes out of tower body outer wall, the flash column still is equipped with external circulation entry end and external circulation exit end and external circulation entry end lies in the below of external circulation exit end; the falling film reboiler is communicated with the flash tower to form a circulation loop, the falling film reboiler is provided with an inlet positioned at the top and an outlet positioned at the bottom, the inlet is connected with an external circulation inlet end, and the outlet is connected with an external circulation outlet end. The utility model discloses aim at solving the big and easy hydrops or the problem of jam of appearing of pipeline of current flash vessel system occupation space.

Description

Flash tower system

Technical Field

The utility model relates to a gas-liquid separation technical field, in particular to flash column system.

Background

Gas-liquid separation is an important part in chemical processes, and the high-efficiency separation of components with large boiling point difference or the gas drying in a plurality of chemical processes needs to be carried out. The flash evaporator is one of the commonly used gas-liquid separators, and generally has a feed inlet, a gas phase outlet and a liquid phase outlet, wherein a high-temperature and high-pressure fluid enters into a low-pressure flash evaporator through the feed inlet, and substances in the fluid with a temperature higher than the boiling point of the fluid under the pressure of the flash evaporator are rapidly boiled and gasified, so that the fluid is separated into a gas phase and a liquid phase. At present, a common flash evaporator system combines a flash evaporator and a condenser, and a gas phase part is discharged through a gas phase outlet of the flash evaporator and then enters the condenser through a connecting pipeline to be condensed to form gas phase condensate which is then collected for use. The condenser and the flash evaporator are large in size, so that the occupied space of the flash evaporator system is large, and the gas phase partially condenses in the pipeline when flowing through the connecting pipeline, so that liquid accumulation or blockage in the pipeline is caused after the gas phase is used for a period of time.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a flash distillation tower system aims at solving the big and easy hydrops or the problem of jam of appearing of pipeline of current flash vessel system occupation space.

In order to achieve the above object, the utility model provides a flash tower system, flash tower system includes:

the flash tower comprises a tower body, wherein the tower body is composed of a condensation layer, a collection layer and a flash layer which are sequentially communicated from top to bottom, one side of the flash layer is provided with a sample inlet, a collection tank is arranged in the collection layer, the collection tank is upwards opened to receive gas-phase condensate dropping from a lower outlet of the condensation layer, the collection tank is provided with a sample outlet communicated to the outer wall of the tower body, the flash layer is also provided with an external circulation inlet end and an external circulation outlet end, and the external circulation inlet end is positioned below the external circulation outlet end; and the number of the first and second groups,

the falling film reboiler is communicated with the flash tower to form a circulation loop, the falling film reboiler is provided with an inlet positioned at the top and an outlet positioned at the bottom, the inlet is connected with the external circulation inlet end, and the outlet is connected with the external circulation outlet end.

Optionally, the flash column further comprises:

the feeding distribution pipe is arranged in the flash evaporation layer and is communicated with the sample inlet; and the number of the first and second groups,

a plurality of liquid baffles that remove, the interval is placed in the flash distillation layer and be located feeding distributor pipe below, it has the fender liquid level of a downward setting at least to remove the liquid baffle.

Optionally, the liquid removal baffle is herringbone.

Optionally, the liquid removing baffles are arranged in a layered manner in the up-down direction, each layer is provided with a plurality of liquid removing baffles, and the liquid removing baffles of two adjacent layers are staggered in the up-down direction.

Optionally, the liquid removal baffle is bent and extends in the vertical direction, and the plurality of liquid removal baffles are arranged in parallel at equal intervals.

Optionally, the liquid removal baffle still includes a plurality of edges remove the fin that liquid baffle surface interval set up, just the fin is located keep off the liquid level and certainly keep off the liquid level and extend the setting downwards.

Optionally, the flash tower further comprises a receiving pipe, the receiving pipe is located in the flash layer and located below the liquid removal baffle, the receiving pipe is provided with a receiving opening and a liquid discharge opening, the receiving opening is communicated with the external circulation outlet end, and the liquid discharge opening is arranged downwards.

Optionally, the harvesting layer further comprises a guide plate, the guide plate is arranged in the harvesting groove and extends upwards from the harvesting groove to form an upward guide surface, so as to guide the gas-phase condensate dropping on the guide plate to enter the harvesting groove.

Optionally, the flash tower system further comprises a circulation pump disposed on the circulation loop and disposed between the external circulation inlet end and the inlet.

In the technical scheme provided by the utility model, the condenser and the flash evaporator are integrated, the pipeline connected between the two containers is reduced, the pipeline resistance is further reduced, the gas phase part formed by flash evaporation is ensured to directly enter the condenser, and the gas phase is prevented from condensing in the pipeline to cause liquid loading or blockage; and introducing the liquid phase formed in the flash evaporator into a reboiler to carry out falling film circulation, returning the liquid phase to the flash evaporator from the bottom of the reboiler, and carrying out secondary separation on the liquid phase, so that the content of low-boiling-point components in the liquid phase is greatly reduced, and the gas-liquid separation effect of the material is better.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of a flash evaporator system provided by the present invention;

FIG. 2 is a schematic flow diagram of FIG. 1;

FIG. 3 is an enlarged detail view taken at A in FIG. 2;

FIG. 4 is an enlarged detail view of the liquid removal baffle shown in B of FIG. 2;

fig. 5 is a schematic structural diagram of another embodiment of a liquid removal baffle of a flash evaporator system provided by the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Flash tower	3021	Liquid blocking surface
1	Condensation layer	3022	Fin
				101	Refrigerant inlet	4	Sample inlet
102	Refrigerant outlet	5	Sample outlet
				2	Harvesting layer	6	External circulation inlet end
201	Collecting tank	7	External circulation outlet end
				202	Flow guide plate	8	Noncondensable gas outlet
3	Flash layer	20	Falling film reboiler
				301	Feed distribution pipe	30	Circulating pump
302	Liquid removing baffle

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The flash evaporator is one of the commonly used gas-liquid separators, and generally has a feed inlet, a gas phase outlet and a liquid phase outlet, wherein a high-temperature and high-pressure fluid enters into a low-pressure flash evaporator through the feed inlet, and substances in the fluid with a temperature higher than the boiling point of the fluid under the pressure of the flash evaporator are rapidly boiled and gasified, so that the fluid is separated into a gas phase and a liquid phase. At present, a common flash evaporator system combines a flash evaporator and a condenser, and a gas phase part is discharged through a gas phase outlet of the flash evaporator and then enters the condenser through a connecting pipeline to be condensed to form gas phase condensate which is then collected for use. The condenser and the flash evaporator are large in size, so that the occupied space of the flash evaporator system is large, and the gas phase partially condenses in the pipeline when flowing through the connecting pipeline, so that liquid accumulation or blockage in the pipeline is caused after the gas phase is used for a period of time.

In view of this, the utility model provides a flash tower system, fig. 1 to fig. 4 are the utility model provides an embodiment of flash tower system, fig. 5 is the utility model provides a flash tower system remove another embodiment of liquid baffle, please refer to fig. 1 to fig. 4, flash tower system includes flash tower 10 and falling film reboiler 20, the utility model discloses a main inventive point lies in the improvement to flash tower system, and the following is mainly explained flash tower system in combination with specific figure.

Referring to fig. 1, the flash column system of the present embodiment includes a flash column 10 and a falling film reboiler 20. Wherein, flash column 10 includes the tower body, and the tower body comprises condensation layer 1, the layer of gathering 2 and the flash distillation layer 3 that top-down communicates the setting in proper order. One side of flash layer 3 is equipped with introduction port 4, is equipped with in the layer 2 of gathering and gathers groove 201, gathers groove 201 and upwards opens the gas phase condensate that the below export drippage that is used for receiving from condensation layer 1, gathers groove 201 and offers intercommunication to tower body outer wall's appearance mouth 5, and flash layer 3 still is equipped with external circulation entry end 6 and external circulation exit end 7 and external circulation entry end 6 is located the below of external circulation exit end 7. The falling film reboiler 20 is externally connected to the flash tower 10 and is communicated with the flash tower 10 to form a circulation loop. The falling film reboiler 20 has an inlet at the top connected to the external circulation inlet port 6 and an outlet at the bottom connected to the external circulation outlet port 7.

The embodiment of the utility model integrates the condenser and the flash evaporator, reduces the pipeline connected between the two containers, further reduces the pipeline resistance, ensures that the gas phase part formed by flash evaporation directly enters the condenser, and avoids the gas phase from condensing in the pipeline to cause liquid loading or blocking; and introducing the liquid phase formed in the flash evaporator into a reboiler to carry out falling film circulation, returning the liquid phase to the flash evaporator from the bottom of the reboiler, and carrying out secondary separation on the liquid phase, so that the content of low-boiling-point components in the liquid phase is greatly reduced, and the gas-liquid separation effect of the material is better.

Specifically, referring to fig. 2, the flash vessel system of this example is comprised of a flash column 10 and a falling film reboiler 20.

Flash column 10 includes the tower body, and the tower body comprises condensation zone 1, harvest layer 2 and flash layer 3, and condensation zone 1,

harvest layer

2 and 3 top-down in proper order intercommunications in the flash layer. Specifically, one side of the flash evaporation layer 3 is provided with a sample inlet 4; the collecting layer 2 comprises an upper outlet, a lower inlet and a gas passing channel communicated with the upper outlet and the lower inlet, a collecting groove 201 is arranged in the gas passing channel, the collecting groove 201 is upwards opened to receive gas-phase condensate dripping from the condensing layer 1, the collecting groove 201 can be arranged in the middle of the gas passing channel and is connected with the side wall of the gas passing channel through a connecting piece, the collecting groove can also be arranged in an annular groove manner in an extending manner along the side wall of the gas passing channel, and meanwhile, the collecting groove 201 is provided with a sample outlet 5 communicated with the outer wall of the tower body to enable the gas-phase condensate to flow out from the sample outlet 5; condensation layer 1 is including a jar body and heat exchange tube, jar body bottom opening forms the below export and leads to with the top export of gathering layer 2, the heat exchange tube is established at the internal and snakelike sinuous setting of jar, refrigerant entry 101 is connected to the one end of heat exchange tube, refrigerant export 102 is connected to the other end, get into the internal gaseous phase of jar and carry out the heat exchange with the refrigerant of circulation in the heat exchange tube, the liquefaction forms the whereabouts of receiving the action of gravity behind the gaseous phase condensate, export the outflow from the below, and simultaneously, consider that there is the composition that can not condense in the gaseous phase, can also set up noncondensable gas export 8 on the lateral wall of the jar body of condensation layer 1, noncondensable gas export 8 can connect the vacuum pump, be used for. So, the material gets into flash layer 3 from introduction port 4, through 3 gas-liquid separation on flash layer, the gaseous phase part that forms rises and gets into harvesting layer 2 to get into the condenser through harvesting layer 2 and condense and form gaseous phase condensate, then receive the action of gravity to return in harvesting layer 2, and receive by locating the harvesting groove 201 in harvesting layer 2, discharge from appearance mouth 5 at last. The flash evaporation tower 10 has the integrated structure of the condenser and the flash evaporator, and a pipeline does not need to be arranged between the condenser and the flash evaporator, so that the pipeline cost is saved, and accumulated liquid or pipeline blockage caused by condensation of gas phase in the pipeline is avoided.

Meanwhile, the flash evaporator system of the embodiment is provided with the falling film reboiler 20, and the flash evaporation tower 10 is communicated with the falling film reboiler 20 to form a circulation loop, so that the liquid phase (the main component is the high boiling point component) primarily separated by the flash evaporation tower 10 enters the circulation loop to be gasified again, and the low boiling point component carried in the liquid phase is further separated, thereby improving the gas-liquid separation effect. Specifically, offer external circulation entry end 6 and external circulation exit end 7 in flash evaporation layer 3, and make external circulation entry end 6 connect in the entry of falling film reboiler 20, make external circulation exit end 7 connect in the export of falling film reboiler 20, and simultaneously, set up external circulation entry end 6 in the bottom of flash evaporation layer 3, establish external circulation exit end 7 on the lateral wall of flash evaporation layer 3, so, the liquid phase through flash evaporation tower 10 initial separation converges and gets into circulation circuit through external circulation entry end 6 in flash evaporation layer 3 bottom, get into the reboiler gasification back once more through the entry, flow through the export in proper order, external circulation exit end 7 gets into flash evaporation layer 3, then, the gasification part rises, liquid then falls to flash evaporation layer 3 bottom and joins the back and gets into the circulation once more. Thus, through multiple circulation, the liquid phase contains less and less vaporizable low-boiling-point components, and the gas-liquid separation effect of the flash evaporator system is improved.

Referring to fig. 2-4, the flash column 10 further includes a feed distribution pipe 301 and a plurality of liquid removal baffles 302. The feeding distribution pipe 301 is arranged in the flash layer 3 and is communicated with the sample inlet 4, a nozzle is arranged on the feeding distribution pipe 301 and is arranged upwards, and materials enter the feeding distribution pipe 301 through the sample inlet 4 and are sprayed out through the nozzle to be uniformly dispersed and gasified in the flash layer 3 to form a gas-liquid mixture; a plurality of liquid-removing baffles 302 are arranged at intervals in the flash layer 3 and below the feed distribution pipe 301, and the liquid-removing baffles 302 have at least one downwardly disposed liquid-blocking surface 3021. In the flash evaporator, a liquid removal baffle 302 is provided in the flow direction of the gas-liquid mixture, and a liquid blocking surface 3021 blocks the liquid phase component in the gas-liquid mixture from rising and causes the liquid phase component to agglomerate into large droplets and then fall downward, so that the gas phase rises and the liquid phase falls, thereby realizing gas-liquid separation.

As a preferred embodiment of the present invention, the liquid-removing baffle 302 is designed in a herringbone shape, as shown in FIG. 4, the liquid-removing baffle 302 is in a straight herringbone shape, and has two liquid-blocking surfaces 3021 disposed obliquely. Further, a plurality of liquid removing baffles 302 can be arranged in a layered manner in the vertical direction, each layer is uniformly and alternately provided with a plurality of liquid removing baffles 302, and in order to uniformly distribute the liquid removing baffles 302 in the flowing direction of the gas phase, the liquid removing baffles 302 of two adjacent layers are staggered in the vertical direction, namely, the liquid removing baffles 302 in one layer are arranged at intervals to form gaps, and the liquid removing baffles 302 are arranged at corresponding positions in the adjacent upper layer or the adjacent lower layer, so that the gas-liquid mixture can contact the liquid removing baffles 302 as much as possible when rising to pass through the liquid removing layer formed by the liquid removing baffles 302, and the separation effect is improved.

As another preferred embodiment of the present invention, the present embodiment designs the liquid-removing baffle 302 to be bent and extend in the up-down direction. As shown in fig. 5, the liquid-removing baffle 302 is S-shaped, and the plurality of liquid-removing baffles 302 are arranged in parallel at equal intervals. Further, the liquid removing baffle 302 further comprises a plurality of fins 3022 arranged at intervals along the surface of the liquid removing baffle 302, and the fins 3022 are arranged on the liquid blocking surface 3021 and extend downward from the liquid blocking surface 3021.

In addition, the flash tower 10 further includes a receiving pipe, and the pipe type of the receiving pipe may be a straight pipe, an elbow pipe, or an annular pipe. The receiver tube is located flash layer 3 and is located the below that removes liquid baffle 302, can set up on the inner wall of flash layer 3 through the connecting piece. The receiving pipe is provided with a liquid outlet and a receiving port, the liquid outlet is usually arranged on the pipe wall of the receiving pipe and is arranged downwards so that liquid entering the receiving pipe enters the flash evaporation layer 3 from the liquid outlet, and the receiving port is communicated with an external circulation outlet end 7 so as to receive liquid treated by a reboiler in the circulation loop.

Referring to fig. 3, harvesting layer 2 includes a harvesting tank 201 and a deflector 202. The guide plate 202 is arranged on the collecting groove 201 and extends upwards from the collecting groove 201, and the guide plate 202 is arranged on a flow path line of gas-phase condensate falling and has a guide surface facing upwards, so that the gas-phase condensate falling onto the guide surface can be guided to flow into the collecting groove 201 along the guide surface.

In addition, the flash tower system further comprises a circulating pump 30, wherein the circulating pump 30 is arranged on the circulating loop and between the external circulating inlet end 6 and the inlet of the falling film reboiler 20, and is used for supplying the liquid phase formed in the flash layer 3 and converged at the external circulating inlet end 6 to the falling film reboiler 20, so that the fluid in the circulating loop can circularly flow.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. A flash column system, comprising:

2. The flash column system of claim 1, wherein the flash column further comprises:

3. The flash column system of claim 2, wherein the liquid removal baffle is chevron shaped.

4. The flash column system of claim 3, wherein the liquid removal baffles are arranged in layers in the up-down direction, each layer is provided with a plurality of liquid removal baffles, and the liquid removal baffles of two adjacent layers are staggered in the up-down direction.

5. The flash column system of claim 2, wherein the liquid removal baffle is bent and extends in an up-down direction, and a plurality of the liquid removal baffles are arranged in parallel at equal intervals.

6. The flash column system of claim 5, wherein the liquid removal baffle further comprises a plurality of fins spaced along a surface of the liquid removal baffle, and wherein the fins are disposed at the liquid stop surface and extend downwardly from the liquid stop surface.

7. The flash column system of claim 2 further comprising a receiver tube positioned within the flash layer and below the liquid removal baffle, the receiver tube having a receiver port in communication with the external circulation outlet end and a liquid drain port positioned downwardly.

8. The flash column system of claim 1 wherein said recovery layer further comprises a deflector plate disposed above said recovery tank and extending upwardly from said recovery tank with an upwardly facing deflector surface to direct said vapor condensate dripping onto said deflector plate into said recovery tank.

9. The flash column system of claim 1, further comprising a circulation pump disposed on the circulation loop between the external circulation inlet end and the inlet.