KR101693166B1 - Nutsche filtering and drying apparatus for liquid powder mixture - Google Patents

Abstract

The present invention relates to a Nutsche filtering and drying apparatus for a mixture of liquid and powder which filters and dries a mixture of liquid and powder to separate corresponding power while producing medicine or the like. The Nutsche filtering and drying apparatus for a mixture of liquid and powder prevents power and liquid from being discharged together while filtering, easily and quickly acquires solid powder from which water is removed, and comprises: a base frame; a main body including a body reversibly mounted on the base frame and provided with a storage unit to store a mixture of liquid and powder, and a lid mounted on the body to open and close an opening part of the storage unit and provided with an outlet disposed on one side thereof; a Nutsche filtering unit disposed between the body and the lid; and a drying means to dry the mixture of liquid and powder of the storage unit. While the main body is reversed, liquid of the mixture of liquid and powder passes through the Nutsche filtering unit to be discharged to the outlet to filter powder. Then the filtered powder is dried by the drying means.

Description

TECHNICAL FIELD [0001] The present invention relates to a NUTSCHE FILTERING AND DRYING APPARATUS FOR LIQUID POWDER MIXTURE,

The present invention relates to a liquid filtration and drying apparatus for a powdery liquid mixture capable of separating a powdery mixture by filtering and drying a mixture of liquid and powder during the production process of medicines and the like, A base frame so as to obtain a solid powder from which moisture has been removed more easily and quickly; A body reversibly coupled to the base frame, the body having a reservoir for storing the powdery liquid mixture, a lid connected to the body for opening and closing an upper opening of the reservoir and having a discharge port at one side; A body filtration unit provided between the body and the lid; And a drying means for drying the powdery liquid mixture of the storage portion, wherein, in a state where the main body is inverted, the liquid of the powdery liquid mixture passes through the filter portion and is discharged to the discharge port to filter the powder, Characterized in that the powder filtered by the means for drying is dried.

In a typical production process such as tablets, which are a form of medicines, powders are put into a mold having a desired shape and are produced by applying pressure. In order to add necessary components to powders, powder and liquid are first mixed and stirred, And the process of using it is preceded.

Conventionally, a drying apparatus for hot air or steam drying a powdery liquid mixture to separate and remove liquid from such a powdery liquid mixture has been mainly used.

Open No. 10-2016-0070960, Registered Patent No. 10-0887174, Registered Patent No. 10-1357756, Registered Patent No. 10-1475813, etc.,

In the conventional techniques, a hot liquid or a steam heat is applied to the inside of a drying apparatus in which a powdery liquid mixture as an object to be dried is dried to dry the powdered liquid mixture, and then the powder dried through a cyclone or the like is sucked and separated.

However, in the simple drying method as in the above-mentioned prior arts, there is a risk that impurities may be mixed during the mixing process of powders and liquids or during the process of putting the powdery liquid mixture into a dryer,

Particularly, since the dried powder has a high water content and a non-uniform particle size, it is difficult to completely separate the pure powder by the ascending current only using the cyclone, and since the boundary layer of moisture and air in the powder is not easily broken, The drying time required for completely removing moisture from the powder takes a long time and the productivity is deteriorated.

Accordingly, the present invention has been made to solve the above-mentioned problems,

A drying step of drying the powdery liquid mixture to shorten the drying time to improve the productivity, and a base frame to completely remove moisture from the powder through filtration and drying of the liquid by suction pressure; A body reversibly coupled to the base frame, the body having a reservoir for storing the powdery liquid mixture, a lid connected to the body for opening and closing an upper opening of the reservoir and having a discharge port at one side; A body filtration unit provided between the body and the lid; And a drying means for drying the powdery liquid mixture of the storage portion, wherein, in a state where the main body is inverted, the liquid of the powdery liquid mixture passes through the filter portion and is discharged to the discharge port to filter the powder, And drying the powder filtered by the means for drying the powdery liquid mixture.

The present invention relates to a method for manufacturing a powdery liquid mixture, which comprises mixing a powdery liquid with a liquid in a storage portion of a main body storing the powdery liquid mixture to prevent mixing of impurities and simplifying a working process, A stirrer for stirring is provided,

A frame portion fixedly coupled in the circumferential direction of the body so as to float the precipitated powder to improve the stirring efficiency of the powder and the liquid, a rotation shaft hinged to both the left and right ends of the frame portion, A driving member provided on the upper portion of the stirring member so as to reciprocate linearly in the forward and backward directions, and upper and lower ends of the driving member are hinged to the driving shaft and the stirring shaft of the stirring member, And an agitator constituted by a link member for switching the forward and backward swing motions of the agitating plate.

The top plate of the lid is formed to be inclined upward from the other end toward the one outlet so that the liquid passing through the body filtration unit can be completely discharged without remaining in the lid of the main body, Shaped body formed in a shape of '∧' having both left and right ends inclined downward relative to the body, and the liquid passing through the body filtration portion flows through the upper plate of the lid and is discharged to the discharge port in the state where the body is inverted, And to provide a drying apparatus.

In order to achieve the above-mentioned object, the present invention provides a device for drying a liquid filtrate,

A base frame;

A body reversibly coupled to the base frame, the body having a reservoir for storing the powdery liquid mixture, a lid connected to the body for opening and closing an upper opening of the reservoir and having a discharge port at one side;

A body filtration unit provided between the body and the lid;

And drying means for drying the powdery liquid mixture of the storage portion,

The liquid in the powdery liquid mixture passes through the non-filtered portion and is discharged to the discharge port to filter the powder, and then the powder filtered by the drying means is dried.

In the apparatus for drying a liquid filtrate for a powdery liquid mixture according to the present invention,

And a stirrer provided at a bottom portion of the storage portion for stirring the powdery liquid mixture.

Further, in the apparatus for drying a liquid filtrate for a powdery liquid mixture according to the present invention,

The stirrer may include:

A frame part fixedly coupled in the circumferential direction of the body,

A plurality of agitating members composed of a rotating shaft having both left and right ends hinged to the frame portion and a stirring plate connected to the lower portion of the rotating shaft,

A driving member provided to reciprocate linearly back and forth at an upper portion of the stirring member,

And a link member hinged to both the upper and lower ends of the driving member and the rotating shaft of the stirring member, respectively, so that the forward and backward linear movement of the driving member is switched to the forward and rearward swing motions of the stirring plate.

In addition, in the apparatus for drying a liquid filtrate for a powdery liquid mixture according to the present invention,

The upper plate of the lid is formed to be inclined upward from the other end toward the one outlet,

Wherein the top plate has a shape of '' 'formed such that its left and right ends are inclined downward with respect to the discharge port,

In the state that the main body is inverted, the liquid that has passed through the body filtration part flows through the upper plate of the lid to the discharge port and is discharged.

The apparatus for drying a liquid filtrate for a liquid mixture according to the present invention is characterized in that a simple drying is carried out by using a hot air or steam in a conventional drying apparatus and further a liquid is filtered by using a non- The powder remaining after filtration is dried to prevent simultaneous discharge of powder and liquid and to obtain solid powder from which moisture has been removed in a short period of time to improve productivity,

A stirrer is provided in a storage portion where the powdery liquid mixture is stored to stir the powder and the liquid in the storage portion to prevent mixing of impurities and improve the liquid absorption efficiency of the powder,

The plurality of agitating members are linked with one driving member and operate simultaneously, so that the agitator can be easily and quickly driven and the stirring efficiency can be improved,

The entire upper plate of the lid is formed to be inclined in the direction of the discharge port so that the liquid passed through the non-filtration section can be discharged completely and quickly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a liquid filtration dryer for a powdery liquid mixture according to the present invention. FIG.
2 is a vertical sectional perspective view showing a cross section of [A] in Fig. 1;
3 is a longitudinal sectional view showing [B] in Fig.
4 is an exploded perspective view of a main body according to the present invention.
5 is an exploded perspective view of the stirrer according to the present invention.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the numerals of the tens and the digits of the digits, the digits of the tens, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

 In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

It is to be understood that the first to second aspects described in the present specification are merely referred to in order to distinguish between different components and are not limited to the order in which they are manufactured, It may not match.

In describing the powdery liquid filtration and drying apparatus according to the present invention, when it is specified for the sake of convenience by referring to an unstable approximate direction reference with reference to FIG. 1 and FIG. 2, the direction in which the gravitational force is directed downward, The vertical direction described in accordance with the reversed state of the main body 100 can be changed in opposite directions from each other, and unless otherwise specified in the detailed description and claims of the invention relating to other drawings, .

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an apparatus for drying a liquid filtrate for a powdery liquid mixture according to the present invention will be described with reference to the accompanying drawings.

The present invention relates to a nasal filtration and drying apparatus for powdery liquid mixture capable of separating the powder by filtration and drying of a mixture of liquid and powder during the production process of medicines and the like,

[A] of FIG. 1, which is a perspective view showing an operating state before the main body 100 of the present invention is reversed, [B] and FIG. 1 of FIG. 1 which is a perspective view showing an inverted operating state of the main body 100 of the present invention (A) of FIG. 2, [B] of FIG. 2, and [B] of FIG. 1, which are cross-sectional perspective views of the cross- Fig. 4, which is an exploded perspective view showing the stirrer 150 of the present invention, and Fig. 5, which is an exploded perspective view showing the stirrer 150 of the present invention.

The apparatus for drying a liquid filtrate for a liquid liquid mixture according to the present invention comprises a base frame 10, a main body 100 coupled to the base frame 10 so as to be reversible, a body 110 of the main body 100, (Not shown) for drying the powdery liquid mixture in the storage part 110A of the main body 100, and a drying device (not shown) for drying the powdery liquid mixture, And a stirrer 150 for stirring the powdery liquid mixture of the portion 110A.

The base frame 10 is composed of an upper horizontal frame 11, a lower horizontal frame 12 and a vertical frame (not shown) connecting the upper and lower horizontal frames 11 and 12,

The upper horizontal frame 11 is provided with a shaft holder 14 to which the rotary shaft portion 116 for inverting the main body 100 is coupled, do.

Particularly, the upper and lower horizontal frames 11 and 12 have a square shape, and a part of the front, rear, left and right frames are cut to secure a space required for rotation of the main body 100.

The main body 100 is coupled to the base frame 10 so as to be reversible and includes a body 110 having a storage part 110A in which a powdery liquid mixture is stored, A lid 120 coupled to the body 110 and having a discharge port 122 at one side thereof and a lower plate 130 coupled to the body 110 to open and close a bottom opening of the storage unit 110A .

The body 110 is connected to drying means (not shown) for drying the powdery liquid mixture of the storage portion 110A. The drying means includes a hot air drier (not shown) for supplying hot air to the storage portion 110A of the body 110, (Not shown), or a steam dryer (not shown) that emits steam to the storage unit 110A of the body 110,

Since the liquid is filtered and discharged to the lower portion of the main body 100 through the inversion of the main body 100, in order to reduce the weight of the main body 100 and simplify the design structure for reversing the main body 100, Is more preferably used.

To this end, the body 110 includes a hot air supply pipe 111 through which hot air is blown to the storage unit 110A and a cylinder 112 for operating an opening and closing plate (not shown) for opening and closing the hot air supply pipe 111 do.

When the powder and the liquid are stirred in the storage part 110A, the drying device composed of the hot air dryer closes the hot air supply pipe 111 by the advancing operation of the cylinder 112, After the liquid used is filtered and discharged, the cylinder 112 is operated backward to open the hot air supply pipe 111. The hot air of the hot air dryer is blown into the storage part 110A to dry the powder.

The body 110 has a mounting portion 113 protruding from an inner surface of the body 110 to which the stirrer 150 is coupled and fixed by a ring 113a and a storage portion 110A can be visually confirmed at one side of the side wall portion A transparent window 114 is provided.

The body 110 is provided with a clamping member 115 for attaching and detaching the lid 120 and the lower plate 130 to the rims surrounding the upper and lower openings.

1 and 2, the reference numeral 116 denotes a rotary shaft portion 116 formed on a side wall portion of the body 110 and coupled to the axial holding portion 14 of the base frame 10.

Further, the body 110 further includes an inversion unit 117 for reversing the rotation of the main body 100 in the base frame 10.

The reversing means 117 includes a worm wheel 117A connected to the rotary shaft portion 116 and a worm gear 117a having a threaded portion (not shown) engaged with a toothed portion (not shown) formed on the outer peripheral surface of the worm wheel 117A And a driving rod 117B connected to the driving rod 117B,

The drive rod 117B includes a handle 117b for directly rotating the drive rod 117B by a user or a motor (not shown) for automatically rotating the drive rod 117B at the opposite end of the worm gear 117a. Can be connected.

The worm wheel 117A rotates together with the fixed worm gear 117a to rotate the rotary shaft 116 of the body 110 so that the worm wheel 117A is rotated from the base frame 10 to the main body 100) is rotated in the reverse direction.

The lid 120 is detachably attached to the upper surface opening of the body 110 by the clamping member 115 to open and close the storage unit 110A so that a discharge port 122 for discharging the liquid is formed on one side.

The discharge port 122 is connected to an air suction unit (not shown) for sucking and discharging the liquid in the storage unit 110A.

Also, the upper plate 121 of the lid 120 is sloped upward from the other end toward the one outlet 122,

The top plate 121 is formed in a shape of '∧' shape having right and left ends inclined downward with respect to the discharge port 122.

3, when the main body 100 is turned upside down, the entire top plate 121 of the lid 120 is inclined downward toward the ∧ -shaped bent portion 121a, (121a) is inclined downward toward the discharge port (122).

1, reference numeral 123 denotes a handle for mounting the lid 120. Fig.

The lower plate 130 is detachably attached to the bottom opening of the body 110 by the clamping member 115 to open and close the storage unit 110A.

The lower plate 130 separates from the body 110 after the filtration and drying of the powdery liquid mixture in the state where the main body 100 is inverted is completed, so that the powder remaining in the storage portion 110A can be obtained.

2, 3, and 4, the body filtration part 140 is coupled between the body 110 and the lid 120, and in a state in which the body 100 is inverted, Only the liquid in the powdery liquid mixture of the storage part 110A is passed through the non-body filtration part 140 and the powder is filtered by the suction pressure generated in the non-filtration part 122.

For reference, Nutsche funnel is a type of nutsche funnel that is made by putting a filter paper on the bottom of a small perforated plate, applying a decompression (suction pressure) to the bottom and pouring the solution over it, (Buchner funnel), which is a method by which a large amount of crystals or precipitates can be separated in a short time using the principle that the solute is passed and filtered.

The present invention can be applied to the first mesh network 141 functioning as a support plate and the second mesh network 142 functioning as a filter paper in close contact with the upper portion of the first mesh network 141 And a body filter unit 140 is provided between the lid 120 and the body 110,

If the air sucker connected to the discharge port 122 is operated to apply a reduced pressure to the space between the lid 120 and the body filtration part 140 while the main body 100 is turned upside down, The liquid is absorbed by the second mesh net 142 and passes through the non-body filtration unit 140 and is discharged to the discharge port 122 by the above- Only the powder remains and remains.

The body filtration part 140 includes the first and second mesh nets 141 and 142 which are fitted and fixed between the lid 120 and the body 110,

The lower part of the lid 120 is further provided with a supporting member (not shown) for supporting the nacelle filtering part 140 when the main body 100 is inverted to prevent the mesh nets from spreading while being worn.

Next, as shown in FIGS. 4 and 5, the stirrer 150 is rotated,

A frame part 151 fixedly coupled in the circumferential direction of the body 110,

A plurality of agitating members 152 composed of a rotating shaft 152A hinged to both sides of the frame 151 at both sides and a stirring plate 152B connected to the lower portion of the rotating shaft 152A,

A driving member 153 configured to reciprocate linearly back and forth on the agitating member 152,

The upper and lower ends of the driving member 153 are hinged to the driving member 153 and the rotating shaft 152A of the stirring member 152 so that the forward and backward linear movement of the driving member 153 is switched to the front and rear swing motions of the stirring plate 152B And the link member 154 is provided.

The frame part 151 is fixedly coupled to the mounting part 113 formed on the inner side surface of the body 110 with a ring 113a and is pivotally coupled to the rotary shaft 152A at positions symmetrical to each other along the circumferential direction A shaft hole 151a is formed.

The stirring member 152 stirs the powdered liquid mixture of the storage portion 110A by the swinging motion of the stirring plate 152B about the rotating shaft 152A axially coupled to the shaft hole 151a.

The driving member 153 includes a pressing portion 153a exposed to the outside of the body 110 and a link portion 153b having both front and rear ends hinged to the driving member 153 and the pressing portion 153a When the operator manually presses the pressing portion 153a back and forth or presses back and forth automatically using a motor or a cylinder or the like, the driving member 153 of the storage portion 110A linearly moves forward and backward.

The link member 154 is formed with an axial projection 154a which is axially coupled to the driving member 153 at an upper end thereof and is engaged with the stirring plate 152B while the rotating shaft 152A is fitted to the lower end thereof A groove 151b is formed.

Therefore, when the driving member 153 is linearly reciprocated by using the pressing portion 153a, the axial protrusion 154a of the link member 154 is accompanied by the reciprocating linear motion in the forward and backward directions, The link member 154 is moved in the forward and backward reciprocating swing motion by the axial projection 154a with the engagement groove 154b as an axis. (152B) to perform a reciprocating reciprocating swing motion, whereby the powdery liquid mixture is agitated.

At this time, the axial projection 154a varies in height during the forward and backward reciprocating swing motion. Since the driving member 153 and the pressing portion 153a are linked by the link portion 153b, the height change of the pressing portion 153a Only the driving member 153 is changed in height together with the axial projection 154a of the link member 154 to perform the reciprocating linear motion.

Hereinafter, the operation and effect of the apparatus for drying a liquid filtrate for a powdery liquid mixture having the above-described structure will be described.

The lid 120 is separated and the powder and the liquid are introduced into the storage portion 110A of the main body 100 while the main body 100 is fixed with the lid 120 facing upward.

At this time, powder and liquid before mixing can be separately supplied, or a mixture in which powder and liquid are mixed in the primary can be put together.

When the powdery liquid mixture is stored in the storage part 110A, the lid 120 is coupled to the body 110, and then the stirrer 150 is operated to mix the powder and the liquid thoroughly.

When the stirring of the powdery liquid mixture is completed, the main body 100 is rotated in the reverse direction so that the lid 120 faces downward by using the reversing means 117.

When the main body 100 is inverted and an air suction unit connected to the discharge port 122 is operated to apply a reduced pressure to the space between the lid 120 and the body filtration unit 140, Only the liquid passes through the non-body filtration part 140 and is discharged to the discharge port 122, and the powder is filtered.

At this time, the liquid passing through the non-body filtration part 140 and falling down to the upper plate 121 of the lid 120 is prevented from being stagnated by the ∧-shaped structure and the inclined structure of the upper plate 121 to the upper plate 121 Flows along the upper plate 121 to the discharge port 122, and is discharged.

After the filtration of the powder is completed, the hot air supply pipe 111 is opened and the hot air dryer is operated, so that the powder filtered by the hot air blown into the storage part 110A is dried to completely remove the moisture remaining in the powder.

At this time, the hot air supplied to the storage part 110A is discharged to the discharge port 122 by the air suction device connected to the discharge port 122, and the remaining amount of the powdery liquid mixture remaining in the storage part 110A is checked, Can be performed simultaneously.

After the powder is filtered and dried, the lower plate 130 is separated from the body 110, and solid powder is obtained to complete the operation. After completion of the operation, the body 100 is separated from the base frame 10, The body 110, the lower plate 130, and the stirrer 150 can be cleaned.

Accordingly, the present invention can improve the productivity by shortening the working time required for obtaining the solid powder through the non-filtration and drying of the powdery liquid mixture, increasing the stirring efficiency through the stirrer 150, The liquid can be completely discharged according to the structure of the body 121 and the drying operation can be carried out easily and quickly through the inversion of the body 100. The maintenance and use of the body filtration and drying apparatus This has a convenient effect.

While the present invention has been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the disclosed embodiments. It will be apparent to those skilled in the art that various modifications, , Changes and substitutions are to be construed as falling within the scope of protection of the present invention.

10: base frame 11: upper horizontal frame
12: lower horizontal frame 13: wheel
14:
100: Body 110: Body
110A: storage unit 111: hot air supply pipe
112: cylinder 113:
113a: collar 114: transparent window
115: clamping member 116:
117: inverting means 117A: worm wheel
117B: driving rod 117a: worm gear
117b: handle 120: lid
121: upper plate 121a: '?'
122: Outlet 123: Handle
130: lower plate 140:
141, 142 mesh network 150 stirrer
151: frame part 151a:
152: stirring member 152A:
152B: stirring plate 153: driving member
153a: pressing portion 153b:
154: Link member 154a: Axial projection
154b:

Claims (4)

A base frame 10;
A body 100 having a storage part 110A in which the powdery liquid mixture is stored so as to be vertically reversible in the base frame 10 and a body 100 to open and close an upper opening of the storage part 110A, And a lid (120) coupled to the one side and having an outlet (122) on one side;
A body filtration part 140 provided between the body 100 and the lid 120;
Drying means for drying the powdery liquid mixture of the storage portion (110A); And
And a stirrer (150) provided at the bottom of the storage part (110A) for stirring the powdery liquid mixture,
When the main body 100 is turned upside down so that the lid 120 faces downward and a reduced pressure is applied through the outlet 122, the liquid of the powdery liquid mixture is filtered by the filter portion 140, discharged to the discharge port (122), the powder is filtered, the powder filtered by the drying means is dried,

The stirrer 150 may be a so-
A plurality of agitating members 152 composed of a rotating shaft 152A and a stirring plate 152B connected to the lower portion of the rotating shaft 152A,
And a driving member (153) provided on the stirring member (152) for swinging the stirring plate (152B) back and forth.
The method according to claim 1,
The body filtration unit 140 includes a first mesh network 141 functioning as a support plate and a second mesh network 142 functioning as a filter paper in close contact with the first mesh network 141,
When the main body 100 is inverted in the vertical direction and the decompression is applied through the discharge port 122, the liquid passes through the first mesh net 141 and is absorbed by the second mesh net 142, , Only the liquid passes through the non-body filtration part (140) and is discharged to the discharge port (122), and only the powder remains in the storage part (110A) of the body (100) Filtration and drying device.
3. The method of claim 2,
The driving member 153 is provided so as to reciprocate linearly back and forth on the agitating member 152,

The stirrer 150 may be a so-
A frame part 151 fixedly coupled in the circumferential direction of the body 100 and hinged to both ends of the pivot shaft 152A,
The upper and lower ends of the driving member 153 are hinged to the driving member 153 and the rotating shaft 152A of the stirring member 152 so that the forward and backward linear motion of the driving member 153 can be performed by the front and rear swing motions of the stirring plate 152B And a link member (154) for allowing the liquid to be filtered and converted.
4. The method according to any one of claims 1 to 3,
The upper plate 121 of the lid 120 is sloped upward from the other end toward the one outlet 122,
The top plate 121 is formed in a shape of 'Λ' whose both ends are inclined downward with respect to the discharge port 122,
Wherein the liquid passing through the body filtration part (140) flows through the upper plate (121) of the lid (120) and flows into the discharge port (122) while the main body (100) Nasal filtration and drying equipment for liquid mixtures.

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