CN117414598A - Reboiler and rectifying column - Google Patents

Abstract

The embodiment of the invention provides a reboiler and a rectifying tower, wherein the reboiler comprises a body, a heating device and a differential pressure type liquid level meter. The body is equipped with evaporating chamber, pressure measurement chamber and shifts the chamber, and evaporating chamber and pressure measurement chamber all are located the below that shifts the chamber, and the top of both all with shift the chamber intercommunication, shift the chamber and be equipped with the inlet, the inlet is arranged in condensate in the rectifying column and gets into and shift the chamber, the bottom in evaporating chamber and the bottom intercommunication in pressure measurement chamber. The differential pressure type liquid level meter is used for acquiring a liquid pressure value of the bottom wall of the pressure measuring cavity and a gas pressure value in the transferring cavity. The heating device is used for heating and vaporizing condensate in the evaporating cavity. According to the embodiment of the invention, the liquid level in the evaporation cavity can be indirectly obtained by measuring the liquid level in the pressure measuring cavity, so that the probability of serious distortion in liquid level detection caused by the influence of gasified substances on condensate density is effectively reduced, and the measurement accuracy of the liquid level in the reboiler is improved.

Description

Reboiler and rectifying column

Technical Field

The embodiment of the invention relates to the technical field of rectification, in particular to a reboiler and a rectifying tower.

Background

The rectifying tower is a tower type gas-liquid contacting device for rectifying. The rectifying tower is provided with a reboiler, liquid flowing back from the rectifying tower flows into the reboiler, wherein one part of liquid is heated and gasified by the reboiler and then returns to the rectifying tower for circulating rectification, and the other part of liquid is gasified and then discharged from a discharge port of the rectifying tower.

The reboiler is provided with a differential pressure sensor. The pressure difference sensor obtains the liquid level of the liquid in the reboiler through obtaining the pressure difference of different positions in the reboiler, so that the yield is controlled based on the liquid level, and the operation safety is improved.

The gas generated by heating and gasifying can be mixed with the liquid, so that the density of the liquid is changed, and the pressure of the liquid is changed, so that the deviation between the liquid level height calculated by the pressure difference sensor based on the pressure value and the actual liquid level height is large, and the accurate liquid level height value cannot be obtained.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a reboiler and a rectifying column capable of improving the accuracy of measuring the liquid level of a liquid.

In order to achieve the above object, the technical solution of the embodiment of the present invention is as follows:

the invention provides a reboiler for a rectifying tower, which comprises:

the liquid inlet is used for enabling condensate in the rectifying tower to enter the transfer cavity, and the bottom of the evaporation cavity is communicated with the bottom of the pressure measuring cavity;

the differential pressure type liquid level meter is used for acquiring a liquid pressure value of the bottom wall of the pressure measuring cavity and a gas pressure value in the transferring cavity;

and the heating device is used for heating and vaporizing the condensate in the evaporation cavity.

In some embodiments, a bottom wall of the transfer chamber is provided with a first communication hole, and the first communication hole extends along a vertical direction to communicate the transfer chamber and the pressure measuring chamber;

and/or the bottom wall of the transferring cavity is provided with a second communication hole which extends along the vertical direction to communicate the transferring cavity and the evaporating cavity.

In some embodiments, the liquid inlet is located at a top wall of the transferring cavity, and at least part of the projection of the liquid inlet is located in a projection range of a communication position of the pressure measuring cavity and the transferring cavity on a projection plane along a horizontal direction;

and/or the projection of the communication position of the pressure measuring cavity and the transferring cavity is positioned outside the projection range of the liquid inlet.

In some embodiments, the evaporation cavity is annularly arranged on the outer side of the pressure measuring cavity along the horizontal direction.

In some embodiments, the liquid inlet is located at a top wall of the transferring cavity, the transferring cavity is in a cone shape, and the area of the cross section of the transferring cavity along the horizontal direction is gradually increased downwards along the vertical direction.

In some embodiments, the transferring cavity is provided with a discharge hole, the discharge hole is arranged on one side inner wall of the transferring cavity along the horizontal direction, and the discharge hole is used for discharging gas generated by gasification in the evaporating cavity out of the body.

In some embodiments, the low pressure detection area of the differential pressure type liquid level meter is arranged on one side inner wall of the transfer cavity along the horizontal direction.

In some embodiments, the body further comprises a transition chamber that communicates with the evaporation chamber and the pressure measurement chamber such that liquid in the pressure measurement chamber and liquid in the evaporation chamber are exchanged through the transition chamber.

In some embodiments, the bottom of the transition chamber is in communication with the bottom of the pressure measurement chamber and the bottom of the evaporation chamber, respectively.

In some embodiments, the transition chamber and the pressure measurement chamber are in communication via a first channel, the transition chamber and the pressure measurement chamber are in communication via a second channel, the first channel and the second channel each extending in a horizontal direction;

the first channel and the second channel are staggered in the vertical direction;

and/or the transition cavity is arranged on the outer side of the pressure measuring cavity along the horizontal direction in a surrounding manner, the evaporation cavity is arranged on the outer side of the transition cavity along the horizontal direction in a surrounding manner, and the first channel and the second channel are arranged in a staggered manner along the circumferential direction.

In some embodiments, the body includes shell, housing and tubular column, be equipped with the first cavity that extends along vertical direction in the shell, the top side of first cavity is opened, the housing cover is located the open position of cavity, be equipped with the second cavity that link up along vertical direction in the housing, the second cavity with first cavity intercommunication, the tubular column extends along vertical direction and is located in the first cavity, the bottom of tubular column with the diapire of first cavity is connected, the inboard space of tubular column forms the pressure measurement chamber, the outer wall of tubular column along the horizontal direction with the inner wall of first cavity along the horizontal direction forms at least part interval of inner wall of horizontal direction forms the evaporation chamber, the tubular column with the inner wall interval of second cavity sets up, at least part of second cavity forms the transfer chamber.

In some embodiments, a third cavity is arranged in the pipe wall of the pipe column, and the bottom communicated with the third cavity is communicated with the pressure measuring cavity and the evaporation cavity.

The embodiment of the invention also provides a rectifying tower, which comprises the reboiler of any one of the previous embodiments.

According to the reboiler provided by the embodiment of the invention, the evaporation cavity and the pressure measuring cavity which are communicated with each other are arranged, so that the liquid level in the evaporation cavity can be indirectly obtained by measuring the liquid level in the pressure measuring cavity, the probability of serious distortion of liquid level detection caused by the influence of gasified gasification substances on condensate density is effectively reduced, the measurement precision of the liquid level in the reboiler is improved, the capacity of condensate in the reboiler is easily mastered in real time in the production process, the probability of dry burning phenomenon of a heating device is easily reduced, and an effective reference basis is provided for controlling the production speed and the product quality.

Drawings

FIG. 1 is a schematic view of a reboiler in a vertical direction according to an embodiment of the present invention;

FIG. 2 is a schematic view of a reboiler in a vertical direction according to another embodiment of the present invention;

fig. 3 is a schematic view of the embodiment of fig. 2 in a horizontal section.

Description of the reference numerals

10. A body; 10a, an evaporation cavity; 10b, pressure measuring cavity; 10c, a transfer chamber; 10d, a liquid inlet; 10e, a first communication hole; 10f, a second communication hole; 10g, a discharge hole; 10h, a third communication hole; 10i, a transition cavity; 10j, a first channel; 10k, a second channel; 11. a housing; 11a, a first cavity; 12. a housing; 12a, a second cavity; 13. a tubular column; 13a, a third cavity; 20. differential pressure type liquid level gauge; 20a, a low pressure detection area; 20b, a high voltage detection area; 30. a heating device.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments of the present invention and the technical features of the embodiments may be combined with each other, and the detailed description in the specific embodiments should be construed as an explanation of the gist of the embodiments of the present invention and should not be construed as undue limitation on the embodiments of the present invention.

In the description of the embodiments of the present invention, the "vertical", "lower", "bottom", "top", "horizontal" orientation or positional relationship is based on the orientation or positional relationship shown in fig. 1 and 2, and it should be understood that these orientation terms are merely for convenience of description of the present application and for simplicity of description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention.

The embodiment of the invention provides a reboiler which is used for a rectifying tower, condensate generated by the rectifying column in the rectifying tower enters the reboiler to be reheated, boiled and gasified, so that a product in a gaseous form can be discharged out of the rectifying tower. Referring to fig. 1 and 2, the reboiler comprises a body 10, a heating device 30 and a pressure differential level gauge 20.

The body 10 is provided with an evaporation cavity 10a, a pressure measuring cavity 10b and a transferring cavity 10c, wherein the evaporation cavity 10a and the pressure measuring cavity 10b are both positioned below the transferring cavity 10c, the tops of the evaporation cavity 10a and the pressure measuring cavity are both communicated with the transferring cavity 10c, the transferring cavity 10c is provided with a liquid inlet 10d, the liquid inlet 10d is used for enabling condensate in the rectifying tower to enter the transferring cavity 10c, and the bottom of the evaporation cavity 10a is communicated with the bottom of the pressure measuring cavity 10b.

The differential pressure gauge 20 is used to acquire the liquid pressure value of the bottom wall of the pressure measuring chamber 10b and the gas pressure value in the transfer chamber 10c.

The heating device 30 serves to heat and vaporize the condensate in the evaporation chamber 10a.

The top of the pressure measuring cavity 10b is communicated with the transferring cavity 10c, that is, a channel is arranged on the top wall of the pressure measuring cavity 10b along the vertical direction and is communicated with the transferring cavity 10c, or a channel is arranged on the top end of the side wall of the pressure measuring cavity 10b along the horizontal direction and is communicated with the transferring cavity 10c.

In this way, condensate that has entered the transfer chamber 10c can enter the pressure measuring chamber 10b, and condensate in the pressure measuring chamber 10b accumulates at one end that is away from the position where the pressure measuring chamber 10b communicates with the transfer chamber 10c in the vertical direction under the action of gravity, and is difficult to enter the transfer chamber 10c.

The condensate in the evaporation chamber 10a is heated up by the heating means 30 until it is higher than the boiling point of the condensate, so that the condensate is gasified into gaseous substances, which transpire to rise toward the top of the evaporation chamber 10a.

The top of the evaporation chamber 10a is communicated with the transfer chamber 10c, which means that a channel is arranged on the top wall of the evaporation chamber 10a along the vertical direction to be communicated with the transfer chamber 10c, or a channel is arranged on the top end of the side wall of the evaporation chamber 10a along the horizontal direction to be communicated with the transfer chamber 10c.

In this way, the gaseous substances in the evaporation cavity 10a can enter the transfer cavity 10c through the communication position of the evaporation cavity 10a and the transfer cavity 10c, and be discharged out of the reboiler through the transfer cavity 10c or returned to the rectifying column of the rectifying column through other channels such as the liquid inlet 10d for rectification again.

The vertical direction refers to the straight line direction in which the gravitational direction is located.

The bottom of the evaporation cavity 10a is communicated with the bottom of the pressure measuring cavity 10b, on one hand, condensate can realize free flow between the evaporation cavity 10a and the pressure measuring cavity 10b under the action of gravity; on the other hand, in the case where there is less condensate in both the pressure measuring chamber 10b and the evaporating chamber 10a, the condensate can still flow therebetween, thereby facilitating the level of the condensate in the pressure measuring chamber 10b to be flush with the level in the evaporating chamber 10a.

It will be appreciated that as the evaporation of condensate in the evaporation chamber 10a decreases, condensate in the pressure measurement chamber 10b can continuously flow into the evaporation chamber 10a to be replenished, thereby reducing the probability of dry burning in the evaporation chamber 10a.

In this way, the condensate enters the transfer chamber 10c through the liquid inlet 10d and can at least enter the pressure measuring chamber 10b, the condensate in the pressure measuring chamber 10b enters the evaporating chamber 10a again, the condensate in the evaporating chamber 10a is evaporated under the heating effect of the heating device 30 to form gaseous substances, and the gaseous substances rise upwards to enter the transfer chamber 10c, are discharged through the transfer chamber 10c or return to the rectifying column of the rectifying tower again.

The differential pressure type liquid level meter 20 is used for measuring the pressure value of the gas phase and the pressure value of the liquid phase at different positions, so as to obtain the liquid level by measuring the differential pressure value between the gas phase and the liquid phase.

The pressure at any depth in the liquid is related to the density and depth of the liquid.

The condensate in the vapour chamber has a density which differs considerably from the actual density of the condensate, due to the influence of gaseous substances generated by vaporization in the vapour chamber. Whereas the condensate in the pressure measuring chamber 10b is less affected by gaseous substances, as it is not directly heated by the heating means 30, the condensate in the pressure measuring chamber 10b. Thus, the density of the condensate in the pressure measuring chamber 10b can more truly reflect the actual density of the condensate.

The level value in the pressure measuring chamber 10b can be calculated from the liquid pressure value of the bottom wall of the pressure measuring chamber 10b and the gas pressure value in the transfer chamber 10c in combination with the actual density of the condensate. The liquid level in the evaporation chamber 10a is obtained by the difference in dimension in the vertical direction between the pressure measuring chamber 10b and the evaporation chamber 10a.

According to the reboiler provided by the embodiment of the invention, the evaporation cavity 10a and the pressure measuring cavity 10b which are communicated with each other are arranged, so that the liquid level in the evaporation cavity 10a can be indirectly obtained by measuring the liquid level in the pressure measuring cavity 10b, the probability of serious distortion in detection of the liquid level caused by the influence of gasified gasification substances on condensate density is effectively reduced, the measurement precision of the liquid level in the reboiler is improved, the capacity of condensate in the reboiler is easily mastered in real time in the production process, the probability of dry burning phenomenon of the heating device 30 is easily reduced, and an effective reference basis is provided for controlling the production speed and the product quality.

It should be noted that, the specific structure of the differential pressure type liquid level meter 20 for measuring the differential pressure is disclosed in the related art, and will not be described herein.

The specific number of the liquid inlets 10d is not limited, and may be one or a plurality.

In some embodiments, both the evaporation chamber 10a and the manometric chamber 10b are of the same dimension in the vertical direction and are located at the same height.

It will be appreciated that it is desirable to have as much condensate in the transfer chamber 10c as possible flow into the evaporation chamber 10a and the pressure measurement chamber 10b as quickly as possible.

For example, referring to fig. 1 and 2, the bottom wall of the transfer chamber 10c is provided with a first communication hole 10e, and the first communication hole 10e extends in the vertical direction to communicate the transfer chamber 10c with the pressure measuring chamber 10b.

That is, the first communication hole 10e communicates the bottom wall of the transfer chamber 10c with the top wall of the pressure measuring chamber 10b.

In this way, on the one hand, the condensate in the transfer chamber 10c can directly pass through the first communication hole 10e into the pressure measuring chamber 10b under the action of gravity, so that the residue of the condensate in the transfer chamber 10c is reduced; on the other hand, the probability of condensate in the pressure measuring chamber 10b re-entering the transfer chamber 10c is also reduced.

The specific number of the first communication holes 10e is not limited, and may be one or a plurality.

As another example, referring to fig. 1 and 2, the bottom wall of the transfer chamber 10c is provided with a second communication hole 10f, and the second communication hole 10f extends in the vertical direction to communicate the transfer chamber 10c with the evaporation chamber 10a.

That is, the second communication hole 10f communicates the bottom wall of the transfer chamber 10c and the top wall of the evaporation chamber 10a.

In this way, on the one hand, the condensate in the transfer chamber 10c is allowed to pass directly through the second communication hole 10f into the steam chamber under the action of gravity, thereby reducing the residue of condensate in the transfer chamber 10 c; on the other hand, the gaseous substances formed by vaporization of the condensate after heating and evaporation can rise upward and directly enter the transfer chamber 10c, thereby being beneficial to improving the evaporation efficiency in the evaporation chamber 10a.

The specific number of the second communication holes 10f is not limited, and may be one or a plurality.

In some embodiments, the liquid inlet 10d is disposed at the top of the transferring chamber 10c, so that, on one hand, the condensate is beneficial to enter the transferring chamber 10c under the action of gravity, but is difficult to flow back into the rectifying column of the rectifying tower; on the other hand, a part of the gaseous substances generated by evaporation in the evaporation chamber 10a is facilitated to rise and enter the rectification column through the liquid inlet 10 d.

The top of the transfer chamber 10c refers to the top wall of the transfer chamber 10c in the vertical direction or the top end of the side wall of the evaporation chamber 10a in the horizontal direction.

It will be appreciated that if condensate in the transfer chamber 10c enters the evaporation chamber 10a, the temperature within the evaporation chamber 10a will be reduced, thereby reducing the evaporation efficiency in the evaporation chamber 10a and even allowing the gaseous species formed by the vaporisation to re-liquid. Therefore, it is necessary to suppress the condensate in the transfer chamber 10c from entering the evaporation chamber 10a so that as much condensate as possible enters the pressure measuring chamber 10b.

In some embodiments, referring to fig. 1 and 2, the liquid inlet 10d is located at the top wall of the transfer chamber 10c, and at least part of the projection of the liquid inlet 10d is located within the projection range of the communication position between the pressure measuring chamber 10b and the transfer chamber 10c on the projection plane along the horizontal direction.

The horizontal projection plane refers to a projection plane perpendicular to the vertical direction.

Condensate passes through the liquid inlet 10d directly into the transfer chamber 10c under the influence of gravity, and at least part of the condensate entering the transfer chamber 10c can pass directly downwards through the transfer chamber 10c into the pressure measuring chamber 10b via the communication position of the pressure measuring chamber 10b and the transfer chamber 10c.

In this way, on the one hand, the efficiency of the condensate entering the pressure measuring chamber 10b is improved, so that the condensate residue in the transfer chamber 10c is reduced; on the other hand, more condensate is allowed to directly enter the pressure measuring chamber 10b, thereby contributing to a reduction in the amount of condensate flowing from the transfer chamber 10c into the evaporation chamber 10a, thereby reducing the adverse effect of condensate on the evaporation efficiency in the evaporation chamber 10a.

In some embodiments, referring to fig. 1 and 2, the liquid inlet 10d is located at the top wall of the transfer chamber 10c, and the projection of the communication position between the pressure measuring chamber 10b and the transfer chamber 10c is located outside the projection range of the liquid inlet 10d on the projection plane along the horizontal direction.

In this way, the condensate that enters the transfer chamber 10c cannot directly enter the evaporation chamber 10a through the communication position of the evaporation chamber 10a and the transfer chamber 10c, thereby contributing to suppressing the amount of condensate that enters the evaporation chamber 10a, and contributing to enabling the evaporation efficiency in the evaporation chamber 10a to meet the production requirements.

In some embodiments, referring to fig. 1 and 2, the projection of the liquid inlet 10d is located entirely within the projection range of the communication position of the pressure measuring chamber 10b and the transfer chamber 10c on the projection plane in the horizontal direction. In this way, it is advantageous to enable condensate to fall directly into the pressure measuring chamber 10b after entering from the liquid inlet 10d, thereby further reducing the amount of condensate flowing from the transfer chamber 10c into the evaporation chamber 10a.

The relative positions of the evaporation chamber 10a and the pressure measuring chamber 10b are not limited.

Illustratively, referring to fig. 3, the evaporation chamber 10a is disposed around the outside of the pressure measuring chamber 10b in the horizontal direction. Therefore, under the condition that the volumes of the evaporation cavity 10a and the pressure measuring cavity 10b are fixed, the overall outline size of the body 10 is reduced, the reboiler is compact in structure, and the installation convenience of the reboiler is improved.

The specific shape form of the transfer chamber 10c is not limited.

Illustratively, referring to FIGS. 1 and 2, the liquid inlet 10d is located at the top wall of the transfer chamber 10c, the transfer chamber 10c is tapered, and the cross-sectional area of the transfer chamber 10c in the horizontal direction gradually increases downward in the vertical direction.

In this way, after the gaseous substances generated by the vaporization of the evaporation cavity 10a enter the transfer cavity 10c, the gaseous substances can flow to the liquid inlet 10d under the guiding action of the side wall of the transfer cavity 10c along the horizontal direction, so that the gaseous substances can flow to other parts in the rectifying tower such as the rectifying column again through the liquid inlet 10d, the residence time of the gaseous substances in the transfer cavity 10c is reduced, and the evaporation efficiency in the evaporation cavity 10a is improved.

The transfer chamber 10c may have a pyramid or a cone.

In some embodiments, the transfer chamber 10c has a right circular cone shape, which is beneficial to making the gas pressure on the inner wall of the transfer chamber 10c uniform and reducing the probability of breakage and leakage due to stress concentration.

It will be appreciated that the vaporized gaseous material in the vaporization chamber 10a is the final product required for the rectifying column.

In some embodiments, referring to fig. 1 and 2, the transfer chamber 10c is provided with a discharge port 10g, and the discharge port 10g is used to discharge the gas generated by gasification in the evaporation chamber 10a out of the body 10.

That is, a part of the gaseous substances generated by the evaporation in the evaporation chamber 10a can be redirected to other parts in the rectifying column such as the rectifying column through the liquid inlet 10d, and another part can be discharged through the discharge port 10g to obtain a rectified product.

It will be appreciated that the outlet 10g is provided with a flow control valve to control the flow of the rectification product required for output.

In some embodiments where the discharge port 10g is provided, the transfer chamber 10c is tapered and the liquid inlet port 10d is located in the top wall of the transfer chamber 10c, referring to fig. 1 and 2, the discharge port 10g is provided in the inner wall of one side of the transfer chamber 10c in the horizontal direction.

On the one hand, the probability that condensate flowing in from the liquid inlet 10d enters the discharge port 10g and is directly discharged due to splashing and the like is reduced, and the flow rate of discharged gaseous substances is conveniently controlled from the discharge port 10 g; on the other hand, in the process that the gaseous substance rises under the guiding action of the side wall of the transferring cavity 10c along the horizontal direction, part of the gaseous substance can directly enter the discharging hole 10g, so that the discharging efficiency is improved.

The specific number of the discharge ports 10g is not limited, and may be one or a plurality.

The differential pressure type liquid level meter 20 is provided with a low pressure detection area 20a and a high pressure detection area, wherein the high pressure detection area is arranged on the bottom wall of the pressure measuring cavity 10b so as to acquire the liquid pressure value of the bottom wall of the pressure measuring cavity 10 b; a low pressure detection area 20a is located in the transfer chamber 10c to acquire a gas pressure value in the transfer chamber 10c.

In some embodiments in which the transfer chamber 10c is tapered and the liquid inlet 10d is located at the top wall of the transfer chamber 10c, referring to fig. 1 and 2, the low pressure detection area 20a of the differential pressure gauge 20 is provided at one side inner wall of the transfer chamber 10c in the horizontal direction.

In this way, the low pressure detection area 20a can detect the gas pressure in the transfer cavity 10c, and meanwhile, the adverse effect of condensate in the transfer cavity 10c on the low pressure detection area 20a is reduced, which is beneficial to improving the detection precision of the differential pressure type liquid level meter 20.

The specific manner of achieving communication between the evaporation chamber 10a and the pressure measuring chamber 10b is not limited, and the two may be direct communication or indirect communication through other structures. For example, referring to fig. 1, the body 10 is further provided with a third communication hole 10h, the third communication hole 10h extends in the horizontal direction, one end of the third communication hole 10h is opened on one side wall of the evaporation chamber 10a in the horizontal direction, and the other end is opened on one side wall of the pressure measuring chamber 10b in the horizontal direction. In this way, direct communication between the evaporation chamber 10a and the pressure measuring chamber 10b is achieved, facilitating the flow of condensate in the third communication hole 10h, reducing obstruction.

It will be appreciated that the heating means 30 heats the condensate in the evaporation chamber 10a, and the heated condensate can exchange heat with the condensate in the pressure measurement chamber 10b through the communication position between the evaporation chamber 10a and the pressure measurement chamber 10b. The condensate in the pressure measuring chamber 10b absorbs heat to cause a temperature rise, and there is a possibility that evaporation vaporization occurs to cause a change in density of the condensate in the pressure measuring chamber 10b, and there is a risk that a high-pressure detection area in the bottom wall of the pressure measuring chamber 10b is caused to distort measurement. Accordingly, an auxiliary structure may be provided so that there is indirect communication between the evaporation chamber 10a and the pressure measurement chamber 10b to reduce heat transfer from the condensate in the evaporation chamber 10a to the condensate in the pressure measurement chamber 10b.

Specifically, referring to fig. 2 and 3, the body 10 further includes a transition chamber 10i, and the transition chamber 10i communicates with the evaporation chamber 10a and the pressure measurement chamber 10b such that the liquid in the pressure measurement chamber 10b and the liquid in the evaporation chamber 10a are exchanged through the transition chamber 10i.

That is, condensate in the pressure measuring chamber 10b first enters the transition chamber 10i, and then flows from the transition chamber 10i into the evaporation chamber 10 a; likewise, condensate in the evaporation chamber 10a enters the transition chamber 10i first and then flows from the transition chamber 10i into the pressure measuring chamber 10b. Thereby achieving indirect communication between the evaporation chamber 10a and the pressure measuring chamber 10b.

The heat of the condensate in the evaporation chamber 10a needs to be transferred to the condensate in the transition chamber 10i first, the condensate in the transition chamber 10i warms up and transfers a part of the heat to the condensate in the pressure measuring chamber 10b. In this way, the condensate in the evaporating cavity 10a cannot directly transfer heat to the condensate in the pressure measuring cavity 10b, and the condensate in the transition cavity 10i shares the heat transferred by a part of the condensate in the evaporating cavity 10a, so that the heat transferred to the condensate in the pressure measuring cavity 10b is effectively reduced, the probability that the condensate in the pressure measuring cavity 10b is heated and evaporated to become a gaseous substance is reduced, and the liquid level height measured by the differential pressure type liquid level meter 20 is favorable for meeting the precision requirement.

It will be appreciated that the location of the transition chamber 10i in communication with the pressure sensing chamber 10b and the evaporation chamber 10a, respectively, should advantageously be such that the liquid levels of the pressure sensing chamber 10b and the evaporation chamber 10a are level.

Illustratively, the bottom of the transition chamber 10i communicates with the bottom of the pressure measuring chamber 10b and the bottom of the evaporation chamber 10a, respectively. In this way, even with less condensate in the pressure sensing chamber 10b and the evaporation chamber 10a, condensate is still able to pass through the transition chamber 10i while a flow is achieved between the pressure sensing chamber 10b and the evaporation chamber 10a.

The bottom of the transition chamber 10i refers to the bottom wall of the transition chamber 10i in the vertical direction or the bottom end of the side wall of the transition chamber 10i in the horizontal direction.

The manner in which the transition chamber 10i communicates with the pressure measuring chamber 10b and the evaporation chamber 10a, respectively, is not limited.

For example, referring to fig. 2 and 3, the transition chamber 10i and the pressure measuring chamber 10b communicate through a first passage 10j, the transition chamber 10i and the pressure measuring chamber 10b communicate through a second passage 10k, and the first passage 10j and the second passage 10k each extend in the horizontal direction.

In this manner, condensate flow is facilitated between evaporation chamber 10a and transition chamber 10i, and between transition chamber 10i and pressure measurement chamber 10b, to maintain the condensate level in evaporation chamber 10a flush with the condensate level in pressure measurement chamber 10b.

It will be appreciated that it is desirable to minimize the likelihood of condensate in the evaporation chamber 10a entering the pressure measurement chamber 10b after entering the transition chamber 10i via the communication location of the transition chamber 10i and the pressure measurement chamber 10b.

In some embodiments, referring to fig. 2, in embodiments where first channels 10j and second channels 10k are provided, first channels 10j and second channels 10k are arranged offset in the vertical direction.

That is, the first channel 10j may be higher than the second channel 10k, or the second channel 10k may be higher than the first channel 10j.

In this way, the flow path of condensate in the vertical direction between the first channel 10j and the second channel 10k is prolonged, thereby facilitating the extension of the residence time of condensate entering the transition chamber 10i from the evaporation chamber 10a in the transition chamber 10i, thereby transferring more heat to condensate in the transition chamber 10i, and reducing the probability of condensate in the evaporation chamber 10a directly passing through the first channel 10j and the second channel 10k into the pressure measuring chamber 10b.

In some embodiments, the height of the second channel 10k is greater than the height of the first channel 10j, which advantageously inhibits condensate from entering the transition chamber 10i into the pressure chamber 10b, while facilitating condensate in the transition chamber 10i to enter the evaporation chamber 10a to replenish condensate consumption in the evaporation chamber 10a.

In some embodiments, referring to fig. 3, in the embodiment provided with the first channel 10j and the second channel 10k, the transition chamber 10i is annularly disposed outside the pressure measuring chamber 10b in the horizontal direction, the evaporation chamber 10a is annularly disposed outside the transition chamber 10i in the horizontal direction, and the first channel 10j and the second channel 10k are circumferentially staggered.

In this way, the flow path of condensate in the horizontal direction between the first channel 10j and the second channel 10k is prolonged, thereby facilitating the extension of the residence time of condensate entering the transition chamber 10i from the evaporation chamber 10a in the transition chamber 10i, thereby transferring more heat to condensate in the transition chamber 10i, and reducing the probability of condensate in the evaporation chamber 10a directly passing through the first channel 10j and the second channel 10k into the pressure measuring chamber 10b.

It will be appreciated that the transition chamber 10i is not in direct communication with the transfer chamber 10c.

The specific physical structures of the evaporation chamber 10a, the pressure measuring chamber 10b, and the transfer chamber 10c formed in the body 10 are not limited.

1-3, the body 10 includes a housing 11, a casing 12, and a pipe column 13, a first cavity 11a extending along a vertical direction is disposed in the housing 11, a top side of the first cavity 11a is open, the casing 12 is covered at an open position of the cavity, a second cavity 12a penetrating along a vertical direction is disposed in the casing 12, the second cavity 12a is communicated with the first cavity 11a, the pipe column 13 extends along the vertical direction and is located in the first cavity 11a, a bottom end of the pipe column 13 is connected with a bottom wall of the first cavity 11a, a pressure measuring cavity 10b is formed in an inner space of the pipe column 13, an evaporation cavity 10a is formed by an outer wall of the pipe column 13 along a horizontal direction and an inner wall of the first cavity 11a along the horizontal direction at least partially at intervals, the pipe column 13 is disposed at an inner wall of the second cavity 12a at least partially forms a transfer cavity 10c.

The space of the first cavity 11a is partially used for accommodating the pipe pile, and the other part is used for forming the evaporation cavity 10a.

The space inside the pipe column 13 refers to a space formed by surrounding the pipe wall of the pipe column 13.

The column 13 is spaced apart from the inner wall of the second cavity 12a so that the gaseous substances formed by vaporization and evaporation formed in the evaporation chamber 10a can enter the transfer chamber 10c through a gap formed by the space therebetween.

It will be appreciated that the connection between the pipe string 13 and the housing 11 is a sealed connection to prevent condensate from also flowing between the evaporation chamber 10a and the pressure measurement chamber 10b through the joint therebetween.

Thus, by the cooperation of the housing 11, the column 13 and the casing 12, the evaporation chamber 10a, the pressure measuring chamber 10b and the transfer chamber 10c are formed.

The specific materials of the housing 11, the casing 12 and the pipe column 13 are not limited, and may be different. In some embodiments, the housing 11, the casing 12, and the tubular string 13 are all stainless steel.

It will be appreciated that the tubular string 13 may extend vertically into the second cavity 12a or may be located entirely within the first cavity 11a only.

It will be appreciated that in the embodiment in which the third communication hole 10h is provided, the third communication hole 10h is located on the pipe string 13 and penetrates the pipe wall of the pipe string 13 in the horizontal direction.

In some embodiments, housing 12 is a thin-walled structure that is tapered such that second cavity 12a is tapered, thereby facilitating tapered transfer chamber 10c.

In some embodiments, the cross section of the pipe column 13 along the horizontal direction is circular, and the shape of the first cavity 11a is a cylinder, so that the pressure of gas and the pressure of liquid on the inner walls of the pipe column 13 and the first cavity 11a are uniform, and the probability of damage to the pipe column 13 and the casing 11 is reduced.

In some embodiments, the outer wall of the pipe column 13 in the horizontal direction is completely spaced from the inner wall of the first cavity 11a in the horizontal direction, so that the evaporation chamber 10a is disposed around the outside of the pressure measuring chamber 10b in the horizontal direction.

In some embodiments, the pipe string 13 is located below the liquid inlet 10d, so that condensate can directly enter the space inside the pipe string 13 after entering the second cavity 12 a.

The specific manner in which the transition chamber 10i is formed is not limited.

For example, referring to fig. 2 and 3, a third cavity 13a is provided in the pipe wall of the pipe column 13, and the bottom communicated with the third cavity 13a is communicated with the pressure measuring cavity 10b and the evaporation cavity 10a.

That is, the pipe wall of the pipe string 13 is hollow, and the third cavity 13a forms the transition chamber 10i in the foregoing embodiment.

It will be appreciated that the first passage 10j and the second passage 10k are both provided in the tubular string 13.

The specific heating means of the heating device 30 to heat the condensate in the evaporation chamber 10a is not limited, and for example, infrared heating, resistance wire heating, and the like.

The specific location of the heating region of the heating device 30 is not limited.

For example, the heating region of the heating device 30 is located in the evaporation chamber 10a to improve heating efficiency and reduce heat loss of the heating device 30.

For another example, referring to fig. 1 and 2, the heating device 30 is disposed on the outer wall of the housing 11, and the heating area of the heating device 30 is attached to the housing 11, so that the maintenance of the heating device 30 is facilitated, meanwhile, the corrosion of the gas and the liquid in the body 10 to the heating device 30 is avoided, and the service life of the heating device 30 is prolonged.

The embodiment of the invention also provides a rectifying tower, which comprises the reboiler of any one of the previous embodiments.

The reboiler is located in the bottom of the rectifying column, and the liquid inlet 10d is communicated with the rectifying column of the rectifying column, so that condensate generated by the rectifying column in the rectifying column can flow into the reboiler under the action of gravity.

The rectifying tower also comprises a distributor for guiding condensate generated by the rectifying column into the reboiler.

It should be noted that the specific structures of the distributor and the rectification column and the corresponding principles for realizing the functions thereof are already applied in the related art, and are not described herein in detail.

The various embodiments/implementations of the invention may be combined with one another without contradiction.

The above description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, so that various modifications and variations can be made to the embodiments of the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims (13)

1. A reboiler for a rectifying column, said reboiler comprising:

the liquid inlet is used for enabling condensate in the rectifying tower to enter the transfer cavity, and the bottom of the evaporation cavity is communicated with the bottom of the pressure measuring cavity;

the differential pressure type liquid level meter is used for acquiring a liquid pressure value of the bottom wall of the pressure measuring cavity and a gas pressure value in the transferring cavity;

and the heating device is used for heating and vaporizing the condensate in the evaporation cavity.

2. The reboiler according to claim 1, wherein a bottom wall of the transfer chamber is provided with a first communication hole extending in a vertical direction to communicate the transfer chamber and the pressure measurement chamber;

and/or the bottom wall of the transferring cavity is provided with a second communication hole which extends along the vertical direction to communicate the transferring cavity and the evaporating cavity.

3. The reboiler of claim 1, wherein the liquid inlet is located at a top wall of the transfer chamber, and at least part of the projection of the liquid inlet is located within a projection range of a communication position of the pressure measurement chamber and the transfer chamber on a projection plane along a horizontal direction;

and/or the projection of the communication position of the pressure measuring cavity and the transferring cavity is positioned outside the projection range of the liquid inlet.

4. The reboiler of claim 1 wherein the evaporation chamber is positioned circumferentially outside the pressure measurement chamber in the horizontal direction.

5. The reboiler of claim 1 wherein the liquid inlet is located at a top wall of the transfer chamber, the transfer chamber is tapered, and the cross-sectional area of the transfer chamber in the horizontal direction increases gradually downward in the vertical direction.

6. The reboiler according to claim 4, wherein the transfer chamber is provided with a discharge port provided at an inner wall of one side of the transfer chamber in a horizontal direction, the discharge port being for discharging gas generated by gasification in the evaporation chamber out of the body.

7. The reboiler of claim 4, wherein the low pressure detection zone of the pressure differential gauge is provided on an inner wall of one side of the transfer chamber in the horizontal direction.

8. The reboiler of claim 1 wherein the body further comprises a transition chamber that communicates with the evaporation chamber and the pressure chamber such that liquid in the pressure chamber and liquid in the evaporation chamber are exchanged through the transition chamber.

9. The reboiler of claim 8 wherein the bottom of the transition chamber is in communication with the bottom of the pressure measurement chamber and the bottom of the evaporation chamber, respectively.

10. The reboiler of claim 9 wherein the transition chamber and the pressure chamber are in communication via a first passageway, the transition chamber and the pressure chamber are in communication via a second passageway, the first passageway and the second passageway each extending in a horizontal direction;

the first channel and the second channel are staggered in the vertical direction;

and/or the transition cavity is arranged on the outer side of the pressure measuring cavity along the horizontal direction in a surrounding manner, the evaporation cavity is arranged on the outer side of the transition cavity along the horizontal direction in a surrounding manner, and the first channel and the second channel are arranged in a staggered manner along the circumferential direction.

11. The reboiler according to claim 1, wherein the body comprises a housing, a cover shell and a pipe column, a first cavity extending along the vertical direction is arranged in the housing, the top side of the first cavity is open, the cover shell is arranged at the open position of the cavity, a second cavity penetrating along the vertical direction is arranged in the cover shell and communicated with the first cavity, the pipe column extends along the vertical direction and is positioned in the first cavity, the bottom end of the pipe column is connected with the bottom wall of the first cavity, the inner space of the pipe column forms the pressure measuring cavity, the outer wall of the pipe column along the horizontal direction and the inner wall of the first cavity along the horizontal direction are at least partially separated to form the evaporating cavity, the pipe column and the inner wall of the second cavity are arranged at intervals, and at least part of the second cavity forms the transferring cavity.

12. The reboiler of claim 11 wherein a third cavity is provided in the wall of the tubular column, the bottom of the third cavity communication communicating with the pressure measuring chamber and the evaporation chamber.

13. A rectifying column, characterized in that it comprises the reboiler of any one of claims 1-12.