KR101859511B1 - Mixture separating apparatus with bubble remover - Google Patents

Abstract

The present invention particularly relates to a mixed liquid separating apparatus having a defoaming unit for removing foam of a mixed liquid, comprising: a housing having a mixed liquid inlet, a gas outlet, and a residual liquid outlet; A heater disposed at an upper end of the heater for separating the gas to be separated from the mixed liquid by supplying heat to the mixed liquid supplied to the mixed liquid inlet to generate a separated residual liquid; The present invention is to provide a mixed liquid separator which is capable of stable separation of mixed liquor by removing bubbles and is capable of removing bubbles generated when carbon dioxide and rich amines meet without using an antifoaming agent.

Description

[0001] The present invention relates to a mixed liquid separating apparatus,

The present invention relates to a mixed liquid separating apparatus, and more particularly to a mixed liquid separating apparatus provided with a defoaming unit for removing bubbles of a mixed liquid.

The prior art chemical process for gas / liquid or liquid / liquid separation uses a distillation type tower, and a heating type reboiling device is provided in the distillation tower to heat the mixture to heat. Separate.

Generally, reboilering equipment is divided into several types and is divided into several types: Internal Reboiler, Kettle Reboiler, Vertical Thermosyphon Reboiler, and Horizontal Thermosyphon There is a Horizontal Thermosyphon Reboiler.

The internally boiler is the simplest type of equipment, with a hot-wire coil that can heat directly to the bottom of the tower. The gas evaporated by the heat generated at the bottom of the tower moves to the top of the tower, It is a way to move down through the tower. The biggest disadvantage of the internally boiler is the size of the distillation column. When the size of the distillation column is small, the installation capacity of the reboiler is limited, and the bubbles generated due to the rusting may rise to the inside of the distillation column Plate-pin type hot-wire coil is mainly used to reduce installation size of reboiler. In addition, the internal reboiler has the disadvantage that the amount of heat transferred per unit volume is very small.

Kettle boilers are the most widely used type because they have the best heat transfer efficiency among the boiler types. However, the liquid scale and the gas can interfere with each other to cause process abnormalities, and the solid scale that can be precipitated through long- There is a problem that it can be stacked inside the boiler.

The vertical thermosyphon reboiler has the advantage that the heating heat line is installed outside the distillation column and has better heat transfer efficiency and less solid fouling than the kettle type. However, there is an additional advantage that the reboiler is installed outside the distillation column There is a drawback in that a separate space is required, and there is a disadvantage that the material is overused due to the amount of the circulating fluid.

The horizontal type thermosyphon reboiler has a structure in which the horizontal type uses a heat exchanger, and has a lower headroom and natural circulation compared to a vertical thermosyphony boiler. However, there is a problem in fouling And the heat transfer effect is uncertain.

In recent years, as global warming and air pollution have become more serious, technology for suppressing the release of carbon dioxide has been actively developed. Especially, a lot of studies are being conducted to efficiently capture carbon dioxide emitted from a thermal power plant or a boiler facility .

Recently, it has been widely known that a chemical absorption method using an absorption liquid is suitable for capturing a large amount of carbon dioxide to capture carbon dioxide. According to the chemical absorption method, carbon dioxide emitted from a thermal power plant or a boiler facility is absorbed into an absorption liquid in an absorption tower, and a saturated absorption liquid which absorbs carbon dioxide is heated in a regeneration tower to separate carbon dioxide from an absorption liquid.

The regeneration tower is equipped with a reboiler for heating the absorption liquid as an energy source for regeneration. The reboiler heats up the absorption liquid to a regenerable temperature, separating the gas contained in the absorption liquid, and most kettle type reboilers are used for space saving and cost saving.

However, during the operation of the regeneration tower, the heat stable salt problem that may occur during long-term operation with the amine absorption liquid and the generation path of the carbon dioxide and steam dissolved in the liquid are overlapped with the rich amine (liquid) Bubbles may be generated, and level control problems may occur.

The bubbles generated by the carbon dioxide and rich amines separated from the reboiler are blocked by the residual liquid outlet, which makes the process unstable. In order to solve such a problem, the conventional reboiler injects the antifoaming agent into the mixed liquid to prevent foaming by the carbon dioxide gas. However, the antifoaming agent thus added serves as a catalyst for causing a side reaction, which is a reaction for allowing the separated carbon dioxide to bind again with the absorption liquid. That is, when the defoaming agent is used, the process is stabilized by breaking the foam, but the reaction efficiency is lowered due to the side reaction.

Therefore, there is a demand for a technology capable of removing bubbles generated by the presence of carbon dioxide and rich amines without using a defoaming agent. However, at present, there is no technology that can solve such a problem without using defoamer.

Patent Registration No. 10-1292488 (registered date: 2013.07.26)

Japanese Patent Application Laid-Open No. 10-2015-0084375 (published on July 21, 2015)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the problems of the prior art, and it is an object of the present invention to provide a method and apparatus for separating a mixed liquid from a vapor and a liquid, And a defoaming agent capable of eliminating bubbles generated when the rich amine is met.

In order to accomplish the above object, the present invention provides a mixed liquid separator comprising a housing having a mixed liquid inlet, a gas outlet, and a residual liquid outlet, and a separator disposed between the mixed liquid inlet and the residual liquid outlet, A heater disposed at an upper end of the heater for separating the gas to be separated from the mixed liquid by providing heat to the supplied mixed liquid and generating a separated residual liquid; And a defoaming group.

Here, the decomposer may preferably be a sieve.

Further, the decomposer may have a tip portion.

Preferably, the mixed liquid inlet port is formed in the lower portion or the side surface of the heater in the housing, and the residual liquid outlet port is formed in the upper portion of the heater in the housing.

In this case, the gas outlet is preferably formed at the upper portion of the residual liquid outlet port in the housing.

The mixed liquid separating apparatus provided with the defoaming unit according to the present invention can separate the mixed liquid from the path of the vapor and the liquid generated during the separation of the mixed liquid and can stably separate the mixed liquid, There is an effect that the generated foam can be removed.

1 is a front sectional view of a mixed liquid separator according to the present invention.
FIG. 2 is a front sectional view of the lower portion of FIG. 1 enlarged.
3 is a plan view and a side view showing a first embodiment of a sieve according to the present invention.
Fig. 4 is a side view showing the action of the sieve in the first embodiment of Fig. 3; Fig.
5 is a plan view showing a second embodiment of a sieve according to the present invention.
6A is a perspective view showing a third embodiment of a sieve according to the present invention.
FIG. 6B is a side view showing the action of the sieve in the third embodiment of FIG. 3; FIG.

The specific structure or functional description presented in the embodiment of the present invention is merely illustrative for the purpose of illustrating an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention can be implemented in various forms. And should not be construed as limited to the embodiments described herein, but should be understood to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an overall cross-sectional view of a mixed liquid separator according to the present invention, and FIG. 2 is an enlarged cross-sectional view of a mixed liquid separator according to the present invention.

1 and 2, the mixed liquid separating apparatus according to the present invention includes a housing 110 having a mixed liquid inlet 112, a gas outlet 132a and a residual liquid outlet 113, a mixed liquid inlet A heater 140 disposed between the liquid supply port 112 and the residual liquid discharge port 113 for supplying heat to the mixed liquid supplied to the mixed liquid inlet 112 to separate the gas to be separated from the mixed liquid and to produce separated residual liquid; And a decomposer 170 for breaking the foam formed by the gas to be separated separated from the mixed liquid by the heater 140.
6A and 6B, a plurality of bubble plates 170 are formed in a horizontal cross-sectional shape of the housing 110 and are stacked at predetermined intervals in the vertical direction, and a plurality of bubble plates 170, And a lower end of the tip end portion of each of the plurality of passage nozzles is attached to the bottom end of each of the plurality of passage nozzles, And needles 172b and 172c formed to be arranged one by one.
6B, the uppermost bubble plate among a plurality of bubble plates is referred to as a second sieve 170b as will be described later, and the bubble plate excluding the uppermost bubble plate is referred to as a thirdsieve 170c.
In this case, the second sieve 170b, which is the uppermost vesicle plate, is provided at the passage nozzle position instead of the passage nozzle in the upper surface, unlike the third sieve 170c which is the lower vesicle plate.
The mixing liquid supply unit 10 and the rectification unit 20 are disposed in the upper part of the upper part of the housing 110. The lower part of the rectification unit 20 is provided with a separator The heater 140 is disposed in a limited manner by the heater 130.

The mixed liquid supply unit 10 may include a mixed liquid supply line 11 and a mixed liquid supply unit 12. The mixed liquid supply unit 10 may include two liquid supply units 10, As shown in FIG.

The mixed liquid supply line 11 receives the mixed liquid from the absorption tower (not shown) or the condensed water from the condenser (not shown) or the heat exchanger (not shown), and the mixed liquid supplied to the mixed liquid supply line 11 and / Or the condensed water to the mixed liquid feeder (12).

The mixed liquid supplier 12 supplies the mixed liquid and / or the condensed water supplied from the mixed liquid supply line 11 into the housing 110 and the mixed liquid and / or the condensed water supplied through the mixed liquid supplier 12 are self- 110).

Reference numeral 13 denotes a fixed plate for fixing the mixed liquid feeder 12 to the housing.

The rectifying section 20 is for uniformly rectifying the flow of the mixed liquid and / or the condensed water, and may be formed by twisting an elongated wire into an irregular shape, or may be provided by a foam plastic having a large gap, It is not.

The rectifying unit 20 may be configured in the same manner as the mixed liquid supplying unit 10, and in the present embodiment, two rectifying units 20 are provided below the respective mixed liquid supplying units 10, respectively.

Here, the separating means for separating the gas to be separated from the mixed liquor can be formed like the separator 130 shown in Fig.

The separator 130 has a gas outlet 132a formed on the side thereof to restrictively separate the space between the rectifier 20 and the heater 140 located at the lowermost end, The mixed liquid in the upper space can not be directly transferred to the heater 140 through the separator 130. [

More specifically, the separator 130 includes a mounting plate 131 coupled to the housing 110 and having a through hole 131a through which the mixed gas flows to the mixed liquid outlet 111, A body 132 having a gas outlet 132a at a predetermined height from the gas outlet 131 and a roof 133 covering the gas outlet 132a to prevent the mixed liquid from flowing into the gas outlet 132a.

A plurality of gas outlets 132a may be formed in the body 132. The direction of the gas outlets 132a is preferably formed in a direction different from that of the mixed liquid outlets 111. [

The heater 140 is disposed at a lower portion of the separator 130 to provide heat to the mixed liquid. The heated mixed liquid evaporates in the space where the heater 140 is located, and a residual liquid is generated. The separated gas moves upward through the separator 130 and is discharged to the outside through the exhaust unit 101.

The housing 110 has a mixed liquid outlet 111 positioned between the rectifying unit 20 and the separator 130 positioned at the lowest position and a mixed liquid inlet 112 formed at a lower portion where the heater 140 is disposed, 111 and the mixed solution inlet 112 are connected by the mixed solution conduit 120.

The housing 110 is formed at a height between the separator 130 and the heater 140 to form a residue liquid outlet 113 through which the residual liquid separated from the mixture liquid can be discharged, 113 are located below the gas outlet 132a of the separator 130. The residual liquid outlet 113 may be connected to the residual liquid conduit 150 to discharge the residual liquid to the outside.

A burner 160 is installed above the heater 140 at a predetermined distance from the upper end of the heater 140.

When the bubbles are formed by the carbon dioxide gas separated from the heater 140, that is, the reboiler, the bubbles block the residual liquid outlet 113, and the process becomes unstable. In order to solve this problem, in the conventional reboiler, the antifoaming agent is mixed into the mixed liquid so as not to be bubbled by the carbon dioxide gas. However, the defoaming agent acts as a catalyst to cause a reaction (side reaction) that causes the separated carbon dioxide to bind again with the absorption liquid. That is, when the defoaming agent is used, the foam is broken to stabilize the process, but the reaction efficiency is lowered due to side reaction.

Therefore, in order to solve such a problem, in the present invention, a defoaming agent 170 for removing bubbles in a mechanical manner is installed in place of a defoaming agent for removing bubbles chemically, so that a solid or other material having adverse mechanical effects .

The desorber 170 may preferably be in the form of a sieve. The sieve shape may be a comb-shaped screen formed by arranging a plurality of comb-shaped flesh as shown in FIG. 3, or a net-like mesh formed by crossing a number of combs in a mesh shape as shown in FIG. 5, 6A and 6B. As shown in Fig. Therefore, the embodiment of the sieve is composed of the first embodiment of Figs. 3 and 4, the second embodiment of Fig. 5, and the third embodiment of Figs. 6A and 6B.

Hereinafter, each embodiment will be described in order.

≪ Embodiment 1 >

The first sieve 170a constituting the first embodiment is constituted by a plurality of first sieve fins 171a arranged parallel and closely to each other as shown in Fig. 3, and a plurality of first sieve fins 171a closely attached to the first sieve fins 171a 172a. Here, the space between each first sieve fins 171a becomes the first sieve eyes 173a in the first sieve 170a, and the liquid L, which forms the mixed liquid through the first sieve eyes 173a, can pass through.

The foam B floating on the upper surface of the mixed liquid and floated along with the mixed liquid is destroyed while colliding against the needle 172a provided on the first sieve 170a. Fig. 4 shows a process in which the floating foam B changes into the foam F which is broken while being in contact with the needle 172a.

Also, as shown in FIG. 4, the first sieve 170a may be installed so that two or more layers overlap. This allows the foam (B) to be thoroughly removed through two or more destructive processes.

In particular, when the first sieve 170a is installed so as to overlap two or more layers, the two first sieves 170a, which are vertically adjacent to each other, are automatically arranged in the vertical upper portion of the lower first sieve eye 173a by disposing the upper first sieve flesh 171a The needle 172a of the first upper first sieve 170a is also disposed vertically above the lower first sieve eye 173a so that the foam B facing the broken first sieve 170a contacts the lower first sieve eye 173a, And is destroyed while being in contact with the needle 172a of the first upper first sieve 170a. Therefore, the foam B can be more thoroughly broken by the overlapping arrangement of the first sieve 170a.

≪ Embodiment 2 >

The second sieve 170b constituting the second embodiment is formed in a shape in which the second sieve fins 171b intersect with each other to form a mesh shape as shown in Fig. 5 is a bottom plan view, the needle 172b in the second sieve 170b is not depicted in a three-dimensional manner, but the symbol 172b indicates the needle having the same shape as in Figs. 3 and 4.

In the second embodiment, more than two second sieves 170b are provided so as to overlap each other vertically, so that effective and thorough destruction of the foam B is possible. 5, the upper second sieve eye 173b is provided more closely than the lower second sieve eye 173b and the needle 172b of the upper second sieve 170b is inserted into the needle 172b of the lower second sieve 170b ), The foam B can be more thoroughly destroyed as the mixed liquid floats.

≪ Third Embodiment >

The third embodiment differs in shape from the ordinary mesh or screen, and the portion through which the mixed liquid passes is formed in a cubic shape, unlike the first sieve eye 173a or the second sieve eye 173b being formed in a plane. Specifically, in the third sieve 170c, the portion through which the mixed liquid passes is referred to as a passing nozzle since it is a cone shape rather than an eye. Therefore, in the third embodiment, the mixed liquid flows upward through the third sieve passage nozzle 173c.

In the third embodiment, the shape of the third sieve passage nozzle 173c is such that the foam B having passed through the third sieve passage nozzle 173c flows directly to the needle 172c closely disposed above the third sieve passage nozzle 173c The third sieve 170c is not installed, and at least two third sieves 170c are installed so as to overlap with each other.

As shown in FIG. 6B, the third sieve passage nozzle 173c forming the third sieve 170c has a shape in which the inner shape becomes narrower toward the upper portion, so that the foam B floating in the third sieve passage 173c passes through the third sieve passage nozzle 173c And is broken.

In particular, since the third sieve passage nozzle 173c becomes narrower toward the upper part, the flow rate of the absorbing liquid that floats is increased, while the liquid L forming the absorbing liquid is guided toward the upper center of the third sieve passage nozzle 173c, Passing foam nozzle 173c and the foaming B which is in contact with the tip of the needle 172c on the bottom surface of the upper third sieve 170c disposed at the center of the upper end of the third sieve passage nozzle 173c, The destruction of the bubble (B) is done thoroughly.

When the third sieve 170c is stacked in multiple stages, the bubble B is thoroughly broken. Therefore, the bubble B can be largely destroyed by the overlap of the second to third folds of the third sieve 170c, and the third sieve Since the nozzle 173c is not required, the second sieve 170b can be disposed as shown in FIG. 6B.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

B: foam L: liquid
F: Foam bursting
10: Mixed liquid supply part 11: Mixed liquid supply line
20: rectification part 101: exhaust part
110: housing 111: mixed liquid outlet
112: Mixed liquid inlet 113: Residual liquid outlet
120: mixed liquid conduit 130: separator
131: mounting plate 131a: through hole
132: body 132a: gas outlet
133: loop 140: heater
150: Residual liquid conduit 151: Water level sensor
160: Salt separation unit 170:
170a: 1st sieve 171a: 1st sieve
172a, 172b, 172c: Needle 173a: First sieve eye
170b: second sieve 171b: second sieve
173b: 2nd sieve eyes 170c: 3rd sieve
171c: third sieve 173c: third sieve passage nozzle

Claims (5)

A housing 110 in which a mixed liquid inlet 112, a gas outlet 132a, and a residual liquid outlet 113 are formed;
A heater 140 positioned between the mixed liquid inlet 112 and the residual liquid outlet 113 for supplying heat to the mixed liquid supplied to the mixed liquid inlet 112 to separate a gas to be separated from the mixed liquid and to generate a separated residual liquid;
And a decomposer 170 disposed at an upper end of the heater 140 and breaking the foam formed by the gas to be separated separated from the mixed liquid by the heater 140,
The freshener 170 is formed in a horizontal cross-sectional shape of the housing 110 and includes a plurality of bubble plates laminated at regular intervals above and below each bubble plate, (172b, 172c, 172c, 172c, 172d, 172c, 172d, 172d, 172d, 172d, 172d, 172d, 172d, 172d, 172d, ),
The uppermost bubble plate is provided with a through hole at the position of the passing nozzle instead of the passing nozzle on the upper surface,
Wherein the mixed liquid which floats at the bottom of any one vesicle plate is floated toward the upper end of the passing nozzle to increase the flow velocity and the bubble of the mixed solution is led to the tip of the needle. delete delete The method according to claim 1,
The mixed solution inlet 112 is formed on the lower side or the side surface of the heater 140 in the housing 110,
Wherein the residual liquid discharge port (113) is formed in the upper part of the heater (140) in the housing (110). 5. The method of claim 4,
Wherein the gas discharge port (132a) is formed on the upper portion of the residual liquid discharge port (113) in the housing (110).

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