CN213221068U

CN213221068U - MVR evaporation equipment vapour and liquid separator's external defoaming device

Info

Publication number: CN213221068U
Application number: CN202021350247.3U
Authority: CN
Inventors: 张小江; 李敏; 陈竹林; 周齐; 马恩禄
Original assignee: Jiangsu Sunevar Energy Technology Co ltd
Current assignee: Jiangsu Sunevar Energy Technology Co ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-05-18
Anticipated expiration: 2030-07-10

Abstract

The utility model discloses an external defoaming device of a gas-liquid separator of MVR evaporation equipment, which comprises a gas-liquid separator body, a foam separator, a foam absorber and a circulating pump; the gas-liquid separator body is communicated with the foam separator; the foam separator is provided with a foam outlet and a liquid phase outlet; the foam separator is communicated with the foam absorber; the foam absorber is provided with a defoaming agent adding port; a defoaming circulating liquid outlet of the foam absorber is communicated with an inlet of the circulating pump; the outlet of the circulating pump is communicated with the defoaming circulating liquid inlet of the foam absorber; arranging an external foam separator and a foam absorber, separating the concentrated solution containing foam in the foam separator, sending the foam to the foam absorber, and eliminating and discharging the foam by selecting a proper defoaming agent; the device uses a small amount of defoaming agent to realize the elimination of foam under the condition of not influencing the stable operation of an evaporation system and the composition of materials, and has ingenious design and automatic continuous operation.

Description

MVR evaporation equipment vapour and liquid separator's external defoaming device

Technical Field

The utility model relates to a MVR evaporation equipment vapour and liquid separator's technical field especially relates to an MVR evaporation equipment vapour and liquid separator's external defoaming device.

Background

Microscopically, in a liquid containing an active agent component, the hydrophilic group of the active agent adsorbs to the liquid phase and the hydrophobic group adsorbs to the gas phase, and the active agents are closely arranged to each other. If bubbles are generated in the liquid phase, the hydrophilic group faces to the water side and the hydrophobic group faces to the bubbles side, a stable elastic film is formed on the gas-liquid interface, and the surface tension, the surface viscosity, the film elasticity, the thinning speed, the temperature and the like of the film influence the stability of the formed foam.

In the MVR evaporation process, superheated liquid formed by the gas-liquid separator after heat exchange of the heat exchanger enters the gas-liquid interface to be rapidly subjected to flash evaporation and gasification, and a large amount of bubbles are generated. Generally, bubbles exist for a short time in pure liquids, but exist for a long time in solutions containing surfactants, such as fermentation broth, wastewater, and biopharmaceuticals. If foam is not controlled, the foam can enter power equipment such as a compressor at the rear end of the system, and the system stops and even the equipment is damaged.

The existing defoaming measures mainly adopt that a defoaming agent is added in equipment, the method can cause the waste of the defoaming agent because the defoaming agent acts on all circulating liquid, and meanwhile, the method can not be suitable for the requirement that other impurities can not be introduced into some materials.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves is: the utility model provides an MVR evaporation equipment vapour and liquid separator's external defoaming device, under the condition that does not influence evaporating system steady operation, does not influence material composition, can realize automatic continuous operation simultaneously using the elimination that a small amount of defoaming agent can realize the foam.

In order to solve the main technical problems, the following technical scheme is adopted:

an external defoaming device of a gas-liquid separator of MVR evaporation equipment comprises a gas-liquid separator body, a foam separator, a foam absorber and a circulating pump; the gas-liquid separator body is provided with a foam liquid outlet; the foam liquid outlet is positioned in the middle of the gas-liquid separator body and is communicated with the foam liquid inlet at the top of the foam separator; the upper part of the foam separator is also provided with a foam outlet, and the bottom of the foam separator is provided with a liquid phase outlet; the foam outlet is communicated with the top of the foam absorber; the foam absorber is provided with a defoaming agent adding port; a defoaming circulating liquid outlet at the bottom of the foam absorber is communicated with an inlet of a circulating pump; and the outlet of the circulating pump is communicated with the defoaming circulating liquid inlet at the upper part of the foam absorber.

Preferably, the gas-liquid separator body is provided with a circulating liquid inlet, a circulating liquid outlet and a secondary steam outlet; the circulating liquid inlet is positioned at the lower part of the middle part of the gas-liquid separator body; the circulating liquid outlet is positioned at the bottom of the gas-liquid separator body; the foam liquid outlet is positioned above the circulating liquid inlet; the secondary steam outlet is positioned at the top of the gas-liquid separator body.

Preferably, the upper part of the gas-liquid separator body is also provided with a first gas-liquid balance port; and the top of the foam separator is also provided with a second gas-liquid balance port communicated with the first gas-liquid balance port.

Preferably, the foam outlet is provided with an annular baffle inside the foam separator; the top surface of the annular baffle is open, and the side wall of the annular baffle is communicated with the foam outlet.

Preferably, the liquid phase outlet is communicated with a U-shaped overflow line; a jumper is arranged at a certain height of the U-shaped overflow pipeline and provided with a first control valve; and an emptying valve is also arranged at the lower point of the U-shaped overflow pipeline.

Preferably, the defoaming circulating liquid inlet is provided with two ends extending into the foam absorber, and the end parts are connected with spray headers.

Preferably, the circulating pump outlet is further provided with an external discharge port.

Preferably, the gas-liquid separator body, the foam separator and the foam absorber are all provided with liquid level meters.

Preferably, the defoaming agent adding port is provided with a second control valve; and a pipeline between the defoaming circulating liquid inlet and the circulating pump outlet is provided with a third control valve.

Compared with the prior art, the utility model discloses be applied to MVR equipment vapour and liquid separator's defoaming utensil has following advantage:

arranging an external foam separator and a foam absorber, separating the concentrated solution containing foam in the foam separator, connecting the foam absorber with the foam separator, and eliminating and discharging the separated foam through the foam absorber by selecting a proper defoaming agent; the device uses a small amount of defoaming agent to realize the elimination of foam under the condition of not influencing the stable operation of an evaporation system and the composition of materials, and has ingenious design and automatic continuous operation.

Drawings

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

Fig. 1 is a schematic view of an overall flow structure provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a gas-liquid separator body according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a foam separator provided in an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a foam absorber according to an embodiment of the present invention.

In the figure: 1 is a gas-liquid separator body, 101 is a circulating liquid inlet, 102 is a circulating liquid outlet, 103 is a foam liquid outlet, 104 is a first gas-liquid balance port, 105 is a secondary steam outlet, 2 is a foam separator, 201 is a second gas-liquid balance port, 202 is a foam liquid inlet, 203 is a liquid phase outlet, 204 is a foam outlet, 205 is an annular baffle, 206 is a U-shaped overflow pipeline, 3 is a foam absorber, 301 is a foam inlet, 302 is a defoaming circulating liquid inlet, 303 is a defoaming agent inlet, 304 is a defoaming circulating liquid outlet, 4 is a circulating pump, 5 is a first control valve, 6 is a second control valve, 7 is a third control valve, 8 is an emptying valve, 9 is an outer discharge port, and 10 is a liquid level meter.

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 work belong to the protection scope of the present invention. In addition, all the connection relations mentioned herein do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions.

Referring to fig. 1-4, an external defoaming device for a gas-liquid separator of an MVR evaporation apparatus includes a gas-liquid separator body 1, a foam separator 2, a foam absorber 3, and a circulation pump 4; the gas-liquid separator body 1 is provided with a circulating liquid inlet 101, a circulating liquid outlet 102, a foam liquid outlet 103 and a secondary steam outlet 105; the circulating liquid inlet 101 is positioned at the lower part of the middle part of the gas-liquid separator body 1; the circulating liquid outlet 102 is positioned at the bottom of the gas-liquid separator body 1; the foam liquid outlet 103 is positioned in the middle of the gas-liquid separator body 1 and above the circulating liquid inlet 101; the secondary steam outlet 105 is positioned at the top of the gas-liquid separator body 1; the foam concentrate outlet 103 is communicated with a foam concentrate inlet 202 at the top of the foam separator 2; after heat exchange is carried out on the raw material liquid through a heat exchanger (not shown in the figure), the raw material liquid enters the gas-liquid separator body 1 through a circulating liquid inlet 101 and is gasified in the equipment to evaporate partial solution; most of the solution flows out through a circulating liquid outlet 102, the solution returns to the interior of the gas-liquid separator body 1 through a circulating liquid inlet 101 after being heated in a circulating mode, a small part of steam generated by evaporation is discharged out of the system through a secondary steam outlet 105, the solution containing foam overflows and is discharged to the foam separator 2 through a foam liquid outlet 103, and the foam liquid inlet 202 of the foam separator 2 is arranged at a height lower than the setting height of the foam liquid outlet 103 because the solution containing foam overflows into the foam separator 2 through the outlet; in order to ensure the pressure balance of the gas-liquid separator body 1 and the foam separator 2, the upper part of the gas-liquid separator body 1 is also provided with a first gas-liquid balance port 104; the top of the foam separator 2 is provided with a second gas-liquid balance port 201 communicated with the first gas-liquid balance port 104.

The top of the foam separator 2 is also provided with a foam outlet 204 and a liquid phase outlet 203, the foam outlet 204 is positioned at the upper part of the foam separator 2, and the liquid phase outlet 203 is close to the bottom surface of the foam separator 2; the foam outlet 204 is communicated with the top of the foam absorber 3; the foam outlet 204 is mainly used for sending the separated foam to the foam absorber 3, and the height of the foam outlet 204 is higher than that of the foam inlet 301 of the foam absorber 3; in order to further prevent the concentrated liquid from entering the foam absorber 3, an annular baffle 205 is arranged at the foam outlet 204, the annular baffle 205 is fixed on the inner wall of the foam separator 2, the annular baffle 205 is of a structure with an open top surface, the structure of the annular baffle 205 is similar to the shape of a water bucket, and the end part of the foam outlet 204 positioned in the foam separator 2 is inserted from the side wall of the annular baffle 205; the foam enters the annular baffle 205 from the top surface of the annular baffle 205 and then flows from the foam outlet 204 to the foam absorber 3; the liquid phase outlet 203 is mainly used for discharging the separated concentrated solution, an external discharge pipeline of the concentrated solution is a U-shaped overflow pipeline 206, one end of the U-shaped overflow pipeline 206 is communicated with the liquid phase outlet 203, and the other end of the U-shaped overflow pipeline is communicated with the outside; a jumper is arranged at a certain height of the U-shaped overflow pipeline 206, the jumper is provided with a first control valve 5, the jumper is close to the highest point of the U-shaped overflow pipeline 206, and the liquid level height of the foam separator 2 can be controlled through the first control valve 5; the low point of the U-shaped overflow pipeline 206 is also provided with an emptying valve 8.

The foam absorber 3 is also provided with a defoaming agent adding port 303, and the defoaming agent adding port 303 is provided with a second control valve 6; in order to improve the defoaming effect, a circulating pump 4 is arranged at the bottom of the foam absorber 3; the inlet of the circulating pump 4 is communicated with a defoaming circulating liquid outlet 304 at the bottom of the foam absorber 3, and the outlet of the circulating pump 4 is communicated with a defoaming circulating liquid inlet 302 at the top of the foam absorber 3; in order to enhance the contact between the defoaming agent and the foam and improve the defoaming effect of the defoaming agent, two defoaming circulating liquid inlets 302 are arranged, and the end parts extending into the foam absorber 3 are connected with spray headers; the spray header disperses and sprays the defoaming agent into the foam for defoaming; in order to facilitate the regulation and control of the defoaming circulating liquid, a third control valve 7 is arranged on a pipeline between the inlet 302 of the defoaming circulating liquid and the outlet of the circulating pump 4; an outlet of the circulating pump 4 is provided with an external discharge port 9 for discharging the absorbing liquid.

The gas-liquid separator body 1, the foam separator 2 and the foam absorber 3 are all provided with a liquid level meter 10; the liquid level meter 10 arranged on the gas-liquid separator body 1 controls the liquid level below the foam liquid outlet 103 to ensure the smooth outflow of foam; the system is also provided with an automatic control system for achieving the degree of automatic defoaming; the foam separator 2 is provided with a liquid level meter 10 and a first control valve 5 positioned at a liquid phase outlet 203, and the opening and closing of the first control valve 5 can be controlled according to the liquid level of the foam separator 2 and the foam condition, so that sufficient foam separation time is ensured; the foam absorber 3 is provided with a liquid level meter 10 and a control valve of an external discharge port 9, and the absorption liquid can be discharged according to the liquid level condition.

The utility model discloses a working process does: after heat exchange is carried out on the raw material liquid by a heat exchanger, the raw material liquid enters the gas-liquid separator body 1 through the circulating liquid inlet 101 and is gasified in the equipment to evaporate part of the solution; most of the solution flows out through a circulating liquid outlet 102, is circulated and heated again and then returns to the interior of the gas-liquid separator body 1 through a circulating liquid inlet 101, a small part of steam generated by evaporation is discharged out of the system through a secondary steam outlet 105, and the solution containing foam overflows through a foam liquid outlet 103 and is discharged to the foam separator 2; the foam separator 2 separates foam of the foam liquid from the concentrated liquid, the separated concentrated liquid is discharged through a liquid phase outlet 203, and the separated foam flows to a foam absorber 3 through a foam outlet 204; a certain amount of defoaming agent is added into the foam absorber 3 through the second control valve 6 of the defoaming agent adding port 303, and the circulating pump 4 circulates the liquid in the foam absorber 3, so that the defoaming effect is improved; and opening a control valve of the outer discharge port 9 according to the liquid level height in the foam absorber 3 to discharge the absorption liquid.

It should be noted that, in the present invention, "upper, lower, left, right, inner and outer" are defined based on the relative position of the components in the drawings, and are only for the clarity and convenience of describing the technical solution, it should be understood that the application of the directional terms does not limit the protection scope of the present application.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or some of the technical features may be substituted by equivalent substitutions, modifications and the like, all of which are within the spirit and principle of the present invention.

Claims

1. The utility model provides a MVR evaporation plant vapour and liquid separator's external defoaming device which characterized in that: comprises a gas-liquid separator body, a foam separator, a foam absorber and a circulating pump; the gas-liquid separator body is provided with a foam liquid outlet; the foam liquid outlet is positioned in the middle of the gas-liquid separator body and is communicated with the foam liquid inlet at the top of the foam separator; the upper part of the foam separator is also provided with a foam outlet, and the bottom of the foam separator is provided with a liquid phase outlet; the foam outlet is communicated with the top of the foam absorber; the foam absorber is provided with a defoaming agent adding port; a defoaming circulating liquid outlet at the bottom of the foam absorber is communicated with an inlet of a circulating pump; and the outlet of the circulating pump is communicated with the defoaming circulating liquid inlet at the upper part of the foam absorber.

2. The external defoaming device of the gas-liquid separator of the MVR evaporation equipment as claimed in claim 1, wherein: the gas-liquid separator body is provided with a circulating liquid inlet, a circulating liquid outlet and a secondary steam outlet; the circulating liquid inlet is positioned at the lower part of the middle part of the gas-liquid separator body; the circulating liquid outlet is positioned at the bottom of the gas-liquid separator body; the foam liquid outlet is positioned above the circulating liquid inlet; the secondary steam outlet is positioned at the top of the gas-liquid separator body.

3. The external defoaming device of the gas-liquid separator of the MVR evaporation equipment as claimed in claim 1, wherein: the upper part of the gas-liquid separator body is also provided with a first gas-liquid balance port; and the top of the foam separator is also provided with a second gas-liquid balance port communicated with the first gas-liquid balance port.

4. The external defoaming device of the gas-liquid separator of the MVR evaporation equipment as claimed in claim 1, wherein: the foam outlet is positioned on the inner side of the foam separator and is provided with an annular baffle; the top surface of the annular baffle is open, and the side wall of the annular baffle is communicated with the foam outlet.

5. The external defoaming device of the gas-liquid separator of the MVR evaporation equipment as claimed in claim 1, wherein: the liquid phase outlet is communicated with a U-shaped overflow pipeline; a jumper is arranged at a certain height of the U-shaped overflow pipeline and provided with a first control valve; and an emptying valve is also arranged at the lower point of the U-shaped overflow pipeline.

6. The external defoaming device of the gas-liquid separator of the MVR evaporation equipment as claimed in claim 1, wherein: the defoaming circulating liquid inlets are two and the end parts extending into the foam absorber are connected with spray headers.

7. The external defoaming device of the gas-liquid separator of the MVR evaporation equipment as claimed in claim 1, wherein: the outlet of the circulating pump is also provided with an external discharge port.

8. The external defoaming device of the gas-liquid separator of the MVR evaporation equipment as claimed in claim 1, wherein: the gas-liquid separator body, the foam separator and the foam absorber are all provided with liquid level meters.

9. The external defoaming device of the gas-liquid separator of the MVR evaporation equipment as claimed in claim 1, wherein: the defoaming agent feeding port is provided with a second control valve; and a pipeline between the defoaming circulating liquid inlet and the circulating pump outlet is provided with a third control valve.