KR102259840B1 - Small pressure type apparatus for evaluating efficiency of liquid-solid separation and method therefor - Google Patents

Abstract

A compact pressurized solid-liquid separation efficiency evaluation device and evaluation method are introduced.
Among them, the compact pressurized solid-liquid separation efficiency evaluation device includes a container that provides an accommodation space for a sample solution and is capable of attaching and detaching a filter cloth, an actuator for pressurizing the sample solution accommodated in the accommodation space, and the sample solution by the actuator. When pressurized, it may include a measurement unit for measuring the filtration amount and filtration rate of the sample solution passing through the filter cloth, and a controller for predicting the moisture content of the sample solution using the filtration amount measured by the measurement unit.

Description

Small pressurized solid-liquid separation efficiency evaluation device and evaluation method {SMALL PRESSURE TYPE APPARATUS FOR EVALUATING EFFICIENCY OF LIQUID-SOLID SEPARATION AND METHOD THEREFOR}

The present invention relates to a compact pressurized solid-liquid separation efficiency evaluation apparatus and evaluation method.

In general, solid-liquid separation is one of the important unit processes essential for wastewater treatment plants, public resource recycling facilities, chemical processes, and food processes.

A filter press is widely used as a device used for solid-liquid separation and dehydration in the production process of the environment, chemical engineering, food, civil engineering, construction fields, etc. or in the water treatment field. The filter press uses a plurality of filter plates and a hydraulic unit to pressurize the sludge located between each filter plate to a certain high pressure, so that liquid and solid can be separated.

However, in the case of designing a conventional filter press, in order to obtain the design factors of the filter press, a dehydrator equipped with a pressurization facility larger than a lab scale is required, and the design factors of the filter press could be derived only through the dehydrator test. In particular, a filter press equipped with a high-pressure compression function requires a trial run using a complex equipment configuration and a large amount of samples, and a lot of manpower and control process are required to derive the design factors of the filter press.

In addition to the solid-liquid separation efficiency of the sample to be applied, design factors (filtration speed, filter cloth type, moisture content of dehydrated cake, thickness of dewatering cake, SS concentration of desorption filtrate, etc.) can be easily derived when designing a commercial-grade membrane filter press. technology is required.

Domestic Registered Patent Publication No. 10-1022815 (Registered on March 9, 2011)

Embodiments of the present invention are intended to provide a compact pressurized solid-liquid separation efficiency evaluation apparatus and evaluation method capable of simply deriving design factors necessary for designing a filter press as well as solid-liquid separation efficiency of a sample to be applied.

A solid-liquid separation efficiency evaluation apparatus according to an aspect of the present invention includes: a container that provides a receiving space for a sample solution, and that a filter cloth is detachably provided; an actuator for pressurizing the sample solution accommodated in the receiving space; a measurement unit for measuring a filtration amount and a filtration rate of the sample solution passing through the filter cloth when the sample solution is pressurized by the actuator; and a controller for predicting the moisture content of the sample solution by using the filtration amount measured by the measurement unit.

In this case, the container may include an upper container into which the sample solution is introduced; For filtration of the sample solution, the filter cloth is detachable filter plate; and a lower container coupled to the upper container with the filter plate interposed therebetween and discharging the sample solution passing through the filter cloth to the measurement unit.

In addition, the upper container may include an upper housing providing an accommodating space therein; a pressing piece connected to the actuator to be driven and installed along the inner wall of the upper housing; and a supply port connected to the pressing piece so that the sample solution is supplied to the receiving space.

In addition, the lower container may include a lower housing provided with a support jaw on which the filter plate can be seated; a discharge port provided on a lower side of the lower housing; and a guide plate that is inclinedly disposed inside the lower housing so that the sample solution passing through the filter cloth is guided to the discharge port.

In addition, the measuring unit includes a pressure gauge for measuring the internal pressure of the receiving space; a weighting machine for measuring the weight of the sample solution passing through the filter cloth; a timer for measuring the filtration time of the sample solution through the filter cloth; and a volume gauge for measuring the volume of the sample solution that has passed through the filter cloth.

In addition, the controller may predict the filtration area of the filter cloth that matches the design capacity of the pressure dehydrator to be designed by using the filtration rate measured by the measurement unit.

In addition, the controller may predict the moisture content (Y) of the dehydrated cake of the sample solution through Equation 1 below.

<Equation 1> Y = -1.44333*exp(-X/-201.33999)+78.81423

<Y: Moisture content (%) , X: Desorption filtrate weight (g)>

In addition, the controller may predict the filtration area corresponding to the design capacity through Equation 2 below.

<Equation 2>

A solid-liquid separation efficiency evaluation method according to an aspect of the present invention comprises: supplying a sample solution to a container equipped with a filter cloth; filtering the sample solution by pressing the sample solution against the filter cloth; measuring a filtration amount and a filtration rate of the sample solution passing through the filter cloth; and predicting the moisture content of the sample solution by using the filtration amount measured by the measurement unit.

At this time, after the step of measuring the filtration amount and the filtration rate of the sample solution, the method further includes the step of predicting a filtration area of the filter cloth that matches the design capacity of the pressure dehydrator to be designed using the filtration rate measured by the measurement unit. can do.

In addition, in the predicting of the moisture content of the sample solution, the moisture content (Y) of the dehydrated cake of the sample solution may be predicted through Equation 1 below.

<Equation 1>

Y = -1.44333*exp(-X/-201.33999)+78.81423

<Y: Moisture content (%) , X: Desorption filtrate weight (g)>

In addition, in the step of predicting the filtration area of the filter cloth, the filtration area corresponding to the design capacity may be predicted through Equation 2 below.

<Equation 2>

Embodiments of the present invention have the advantage that it is possible to very simply evaluate the solid-liquid separation efficiency test in the pressurized condition and derive design factors.

In addition, the embodiments of the present invention have the advantage that it is possible to select an optimal filter cloth by performing an evaluation on solid-liquid separation at high pressure even with only the type of filter cloth.

In addition, since the embodiments of the present invention can evaluate the change in moisture content according to the thickness of the final dehydrated cake according to the solid-liquid separation and the efficiency by pressure conditions within a short time (within 30 minutes), design factors of various conditions for various samples There is an advantage that it can be applied to a derivation experiment.

1 is a block diagram illustrating an apparatus for evaluating solid-liquid separation efficiency according to an embodiment of the present invention.
Figure 2 is an exploded view showing the separation of the container of the solid-liquid separation efficiency evaluation apparatus according to an embodiment of the present invention.
3 is a block diagram illustrating a control logic of an apparatus for evaluating solid-liquid separation efficiency according to an embodiment of the present invention.
4 is a flowchart illustrating a solid-liquid separation efficiency evaluation method according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the configuration and operation according to the embodiment of the present invention will be described in detail. The following description is one of several aspects of the present invention that is claimable, and the following description may form a part of the detailed description of the present invention. However, in describing the present invention, detailed descriptions of known configurations or functions may be omitted for clarity of the present invention.

The present invention is capable of making various changes and may include various embodiments, and specific embodiments are illustrated in the drawings and described in the detailed description. However, this is not intended to limit the present invention to a specific embodiment, it should be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

In addition, terms including an ordinal number such as 1st, 2nd, etc. may be used to describe various components, but the components are not limited by these terms. These terms are only used for the purpose of distinguishing one component from another. When an element is referred to as being'connected' or'connected' to another element, it is understood that it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

1 is a block diagram illustrating a solid-liquid separation efficiency evaluation device according to an embodiment of the present invention, and FIG. 2 is an exploded view showing a container of the solid-liquid separation efficiency evaluation device according to an embodiment of the present invention, 3 is a block diagram illustrating a control logic of an apparatus for evaluating solid-liquid separation efficiency according to an embodiment of the present invention.

1 to 3 , the solid-liquid separation efficiency evaluation apparatus according to an embodiment of the present invention may include a container 100 , an actuator 200 , a measurement unit 300 and a controller 400 . have.

Specifically, the container 100 may receive a sample solution from a separate solution supply device (not shown), and temporarily store the supplied sample solution in the receiving space 101 . Here, the sample solution is a sample for evaluating the solid-liquid separation efficiency (water content, filtration area for design capacity...) of the solution to be used, and may include sewage, wastewater, and various sludges.

The container 100 may include an upper container 110 , a filter plate 120 , and a lower container 120 .

The upper container 110 includes an upper housing 111 that provides a receiving space 101 therein, a pressing piece 112 that is installed so as to be liftable along the inner wall of the upper housing 111 , and a pressing piece 112 . It may include a supply port 113 for supplying the sample solution to the receiving space 101 through.

Here, the upper housing 111 may be provided as a hollow housing into which the sample solution is injected. The upper housing 111 may have a cylindrical shape in which upper and lower portions are opened. Inside the upper container 110, the receiving space 101 in which the sample solution can be accommodated between the pressing piece 112 and the filter plate 120 may be created.

The pressing piece 112 may be raised and lowered inside the upper housing 111 by the actuator 200 . The pressing piece 112 may have an area corresponding to the outer diameter of the upper housing 111 , and an upper portion of the pressing piece 112 may be driven and connected to the actuator 200 , and the edge of the pressing piece 112 may have an area corresponding to the outer diameter of the pressing piece 112 . An O-ring and a seal for sealing the upper portion of the upper housing 111 from the outside may be provided.

Accordingly, when the pressing piece 112 is lowered from the upper housing 111 by the actuator 200 , the sample solution in the accommodation space 101 may be pressed by the pressing piece 112 , and the pressing piece 112 . ), the sample solution having a particle size or less pressurized may pass through the filter cloth 140 and the filter plate 120 to move to the lower housing 131 .

In addition, the supply port 113 and the pressure gauge 310 may be connected to the upper portion of the pressing piece 112 . The supply port 113 may provide a sample solution supplied from a separate solution supply device (not shown) to the receiving space 101 of the upper housing 111 through the pressing piece 112 . The pressure gauge 310 is a pressure measuring device for measuring the internal pressure of the upper housing 111, and communicates with the receiving space 101 through the pressing piece 112, so that the internal pressure of the upper housing 111 can be measured. have.

To this end, in the inside of the pressing piece 112, the first through-hole 112a that communicates between the supply port 113 and the receiving space 101, and the pressure gauge 310 and the receiving space 101 to communicate between the A second through hole 112b may be formed.

The filter plate 120 is a plate having a plurality of slits for filtration of the sample solution, and a filter cloth 140 may be placed on the upper surface of the filter plate 120 . Accordingly, when the sample solution is pressurized by the actuator 200 , the sample solution in the receiving space 101 may be filtered while passing through the filter cloth 140 .

The lower container 120 may be fastened to the upper container 110 through the fastening bolt 102 with the filter plate 120 interposed therebetween. In addition, the lower container 120 may discharge the sample solution that has passed through the filter cloth 140 to the measurement unit 300 .

To this end, the lower container 120 includes a lower housing 131 coupled to the upper housing 111 , a discharge port 132 provided on one lower side of the lower housing 131 , and a sample that has passed through the filter cloth 140 . It may include a guide plate 133 which is inclinedly disposed inside the lower housing 131 so that the solution is guided to the discharge port 132 . At this time, since the support jaw 131a on which the filter plate 120 can be seated is provided on the upper portion of the lower housing 131 , the filter plate 120 can be stably fixed between the upper housing 111 and the lower housing 131 . .

The measuring unit 300 may measure the filtration amount and the filtration speed of the sample solution passing through the filter cloth 140 when the sample solution is pressurized by the actuator 200 . Information on the amount of filtration and the filtration rate measured by the measurement unit 300 may be applied to the controller 400 .

The measurement unit 300 includes a pressure gauge 310 for measuring the internal pressure of the receiving space 101 , a weighting machine 320 for measuring the weight of the sample solution passing through the filter cloth 140 , and the sample solution using the filter cloth It may include a timer 330 for measuring the filtration time through 140 and a volume cage 340 for measuring the volume of the sample solution that has passed through the filter cloth 140 .

For example, the measurement unit 300 may measure the filtration amount of the sample solution through the volume cage 340 , and measure the filtration rate of the sample solution through the volume cage 340 and the timer 330 . Of course, the measurement unit 300 may provide various measurement values required by the user through the pressure gauge 310 and the weighting machine 320 in addition to the filtration amount and the filtration speed.

The controller 400 controls the above-described components, for example, the actuator 200, the measurement unit 300, the solution supply device, etc. as a whole, in order to evaluate the water content of the sample solution and the filtration area for the design capacity. can

For example, the controller 400 may supply a sample solution into the container 100 by applying an operation signal to the solution supply device, and apply an operation signal to the actuator 200 to pressurize the sample solution in the container 100 to a predetermined pressure. It is possible to measure various information about the sample solution by applying an operation signal to the measurement unit 300 .

In particular, the controller 400 can store the information on time, pressure, and weight given in the present invention in real time, and the measured value provided to the measurement unit 300 is expressed in the following formulas 1 and 2 By linking to , it is possible to predict the moisture content and filtration area (the number of filter cloths in a certain area) according to the operation of the facility.

For example, the controller 400 may predict the moisture content (Y) of the dehydrated cake of the sample solution by using the filtration amount measured by the measurement unit 300 . In this case, the controller 400 may use Equation 1 below. Equation 1 is a derivation equation when the moisture content of the sample solution is 80%, and the equation according to the change in moisture content of the sample solution is automatically derived as shown in Equation 1 in the program and the equation can be applied.

<Equation 1>

Y = -1.44333*exp(-X/-201.33999)+78.81423

<Y: Moisture content (%) , X: Desorption filtrate weight (g)>

For example, when 1 L of the sample solution (based on the moisture content of 80%) is provided, the controller 400 may calculate the moisture content of the sample solution using <Equation 1>. As shown in Table 1 below, the controller 400 may predict the weight of the desorption filtrate permissible in the pressurized dehydrator using the calculated moisture content. Table 1 is a theoretical value, and the moisture content derived value by the derived formula is shown as in Table 2. It can be seen that the error range is within 3%.

[Table 1]

[Table 2]

In addition, the controller 400 can calculate a filtration area that matches the design capacity using the filtration rate measured by the measurement unit 300, and the required number of filter plates (filter cloths) can be predicted through the calculated filtration area. .

Here, since the quantity of the filter plate 120 is changed according to the filtration area, the size (standard) of the pressure dehydrator can be designed as desired by specifying the size (eg, diameter 110 mm) or quantity of the filter plate 120 as needed. can At this time, the required quantity of the filter plate 120 may utilize the following Equation 2 according to the design capacity and operating time desired by the consumer.

<Equation 2>

(Filtration speed: kg.ds/m ² hr, design capacity: L, operating time (hr), filtration area: m ² )

On the other hand, the determination of whether a coagulant is necessary is applied differently depending on the final target (moisture content of the dehydrated cake) for each process (sewage-wastewater treatment process, food process, chemical process, etc.) to be applied. As shown in Table 3 below, the moisture content of the dewatering cake for each pressure condition may vary depending on the thickness of the dewatering cake.

[Table 3]

(Experimental data of the present invention: 10kgf/cm ² standard, operating time 10 minutes, sample solution (pre-treatment concentrated sewage sludge))

Filtration speed and efficiency in solid-liquid separation decrease as the thickness of the dewatering cake increases due to resistance within the cake. Therefore, the thickness of the dehydrated cake can be calculated according to the design target condition of the consumer.

As in the above conditions, when the pressure conditions applied to the present invention are changed at the same thickness of the dewatering cake, the higher the pressure, the lower the moisture content of the dehydrated cake, and as a result, the pressure dewatering device to be designed using the data (for example, , can be selected by designing the pressure conditions and operating pressure of the pressurized filter press).

4 is a flowchart illustrating a solid-liquid separation efficiency evaluation method according to an embodiment of the present invention.

As shown in FIG. 4 , the evaluation method of the motor core according to an aspect of the present invention includes the steps of supplying a sample solution to a container equipped with a filter cloth (S100), filtering the sample container (S200), It may include the steps of measuring the filtration amount and filtration rate of the sample solution (S300), predicting the moisture content of the sample solution (S400), and predicting the filtration area of the filter cloth.

In the step of supplying the sample solution to the container provided with the filter cloth (S100), a predetermined amount of the sample solution is supplied into the receiving space 101 of the container. At this time, the sample solution may be supplied from the solution supply device to the receiving space 101 of the container through the supply port 113, and the filter cloth may be maintained in a state supported by the filter plate in the container.

In the step of filtering the sample container (S200), the sample solution contained in the receiving space 101 of the container is pressurized to pass the filter cloth. The pressurization of the sample solution against the filter cloth may be provided by a press piece that is raised and lowered by an actuator. For example, when the pressure piece is lowered by the actuator, the sample solution is filtered in the filter cloth by the pressure of the pressure piece, and the sample solution having a predetermined particle size or less may pass through the filter cloth.

In the step of measuring the filtration amount and the filtration rate of the sample solution (S300), the filtration amount and the filtration rate of the sample solution passing through the filter cloth are measured. For example, the filtration amount of the sample solution may be measured through a volume gauge of the measurement unit, and the filtration rate of the sample solution may be measured through a volume gauge and a timer of the measurement unit. .

In the step of predicting the moisture content of the sample solution ( S400 ), the moisture content of the sample solution is predicted using the filtration rate of the sample solution. The moisture content of the sample solution may be calculated through Equation 1 described above.

In the step of predicting the filtration area of the filter fabric, the filtration area of the filter fabric that matches the design capacity of the pressure dehydrator to be designed is predicted using the filtration rate of the sample solution. The filtration area of the filter cloth can be calculated through Equation 2 described above.

Since the filtration area of the filter cloth can be adjusted by changing the number of filter plates (filter cloth), the size (standard) of the pressurized dehydrator can be set as desired by specifying the size (eg, diameter of 110 mm) or quantity of the filter plate 120 as needed. can be designed

As described above, the present invention can very simply evaluate the solid-liquid separation efficiency test in the pressurized condition, derive design factors, and select the optimal filter cloth by conducting the evaluation of solid-liquid separation at high pressure even with only the filter cloth type. This is possible, and the change in moisture content according to the thickness of the final dehydrated cake according to solid-liquid separation and the efficiency of each pressure condition can be evaluated within a short time (within 30 minutes), so it is applied to the experiment of deriving design factors under various conditions for various samples It has excellent advantages such as being possible.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can be implemented in other specific forms without changing the technical spirit or essential features. You will be able to understand. For example, those skilled in the art may change the material, size, etc. of each component according to the field of application, or combine or substitute the embodiments in a form not clearly disclosed in the embodiment of the present invention, but this is also the present invention is not outside the scope of Therefore, the embodiments described above should not be understood as illustrative and limiting in all respects, and it should be said that these modified embodiments are included in the technical spirit described in the claims of the present invention.

100: container 110: upper container
111: upper housing 112: press piece
113: supply port 120: filter plate
130: lower container 131: lower housing
132: exhaust port 133: guide plate
200: actuator 300: measuring unit
310: pressure gauge 320: weighting machine
330: timer 340: volume gauge
400 : controller

Claims (12)

A container that provides a receiving space for the sample solution, and is provided so that the filter cloth is detachable;
an actuator for pressurizing the sample solution accommodated in the receiving space;
a measuring unit for measuring a filtration amount and a filtration rate of the sample solution passing through the filter cloth when the sample solution is pressurized by the actuator; and
And a controller for predicting the filtration area of the filter cloth that matches the design capacity of the pressure dehydrator to be designed using the filtration rate measured by the measurement unit,
the container
The upper container into which the sample solution is introduced, a filter plate with a removable filter cloth for filtration of the sample solution, and the upper container with the filter plate interposed therebetween, the sample solution passing through the filter cloth is measured Including a lower container for discharging to the unit,
The upper container
An upper housing providing a receiving space inside, a pressing piece that is driven and connected to the actuator, is installed to be lifted and lowered along an inner wall of the upper housing, and is connected to the pressing piece so that the sample solution is supplied to the receiving space It includes a supply port, and a first through-hole communicating between the supply port and the receiving space and a second through-hole communicating between the pressure gauge and the receiving space are formed inside the pressing piece,
The lower container
A lower housing provided with a support jaw on which the filter plate can be mounted, a discharge port provided on a lower side of the lower housing, and the sample solution passing through the filter cloth are guided to the discharge port inside the lower housing. A compact pressurized solid-liquid separation efficiency evaluation device including a guide plate disposed at an angle. delete delete delete The method of claim 1,
The measuring unit is
a pressure gauge for measuring the internal pressure of the accommodating space;
a weighting machine for measuring the weight of the sample solution passing through the filter cloth;
a timer for measuring the filtration time of the sample solution through the filter cloth; and
A compact pressurized solid-liquid separation efficiency evaluation device comprising a volume gauge for measuring the volume of the sample solution passing through the filter cloth. delete delete The method of claim 1,
the controller is
A compact pressurized solid-liquid separation efficiency evaluation device for predicting the filtration area corresponding to the design capacity through Equation 2 below.
<Equation 2>

supplying the sample solution to a container equipped with a filter cloth;
filtering the sample solution by pressing the sample solution against the filter cloth;
measuring a filtration amount and a filtration rate of the sample solution passing through the filter cloth in a measuring unit; and
Predicting the filtration area of the filter cloth that matches the design capacity of the pressure dehydrator to be designed using the filtration rate measured by the measurement unit,
the container
The upper container into which the sample solution is introduced, a filter plate with a removable filter cloth for filtration of the sample solution, and the upper container with the filter plate interposed therebetween, the sample solution passing through the filter cloth is measured Including a lower container for discharging to the unit,
The upper container
An upper housing providing a receiving space inside, a pressing piece connected to an actuator and installed to be able to move up and down along an inner wall of the upper housing, and a supply connected to the pressing piece so that the sample solution is supplied to the receiving space A port is included, and a first through hole communicating between the supply port and the receiving space and a second through hole communicating between the pressure gauge and the receiving space are formed inside the pressing piece,
The lower container
A lower housing provided with a support jaw on which the filter plate can be mounted, a discharge port provided on a lower side of the lower housing, and the sample solution passing through the filter cloth are guided to the discharge port inside the lower housing. A small pressurized solid-liquid separation efficiency evaluation method comprising a guide plate disposed at an angle. delete delete The method of claim 9,
The step of predicting the filtration area of the filter cloth,
A small pressurized solid-liquid separation efficiency evaluation method for predicting the filtration area corresponding to the design capacity through Equation 2 below.
<Equation 2>

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