KR101916388B1 - Filtering apparatus and method for moisture content monitoring using the same - Google Patents

Abstract

The present invention relates to a filtration apparatus. The filtration apparatus according to the present invention comprises: a main body for performing a dewatering operation of sludge; a sludge injection pipe for injecting sludge into the main body; a sludge measuring sensor for measuring information on the sludge to be injected; a filtrate discharge pipe for discharging the filtrate dewatered from the sludge; a filtrate measuring sensor for measuring information on the filtrate dewatered from the sludge; a calculator for calculating the moisture content of a cake by collecting the information measured from the sludge measuring sensor ad the filtrate measuring sensor; and a control unit for controlling a process of dewatering the sludge.

Description

FIELD OF THE INVENTION [0001] The present invention relates to filtration apparatuses,

The present invention relates to a filtration apparatus capable of monitoring the water content of a cake in which filtrate is dewatered in real time, and a water content monitoring method using the same.

In general, the industrial filtration system is a post-treatment facility for discharging the wastewater that has been subjected to physical treatment or microbiological treatment during the wastewater treatment process, and the mixture after the pre-treatment in the chemical process is formed into a cake state by filtration and dehydration treatment .

In such an industrial filtration device, the filtrate is dewatered from the sludge to form the solid contained in the sludge into a cake state.

An important point in the filtration device is to reduce the moisture content in the cake, which is a separate solid. Moisture content refers to the amount of moisture contained in the cake. Reducing the moisture content can reduce the weight of the cake and lighten the waste. In the production process, it is necessary to dry the powder requiring the secondary drying. It is possible to improve the processing cost and the productivity. If the water content becomes higher than a predetermined value, the performance of the filtration apparatus is suspected to be degraded. Therefore, it is necessary to immediately start maintenance and maintain the water content of the cake within an appropriate range.

Conventionally, the water content of the cake can not be measured in real time, and the driving time and the number of driving times of the filtration device are used as a reference, but the maintenance and inspection are periodically performed. However, regular maintenance is difficult to cope with sudden performance abnormality, and unnecessary maintenance is caused, resulting in poor management efficiency.

The present invention is to provide a filtration device capable of detecting a failure or a performance deterioration in an early stage by monitoring the water content of a cake in which dehydration has occurred in real time.

The objects of the present invention are not limited thereto, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

The present invention provides a filtration apparatus.

According to an embodiment of the present invention, there is provided a sludge dewatering apparatus comprising: a main body for performing a dewatering operation of sludge; A sludge injection pipe for injecting sludge into the main body; A sludge measuring sensor for measuring information on the sludge to be injected; A filtrate discharge pipe for discharging the filtrate dewatered from the sludge; A filtrate measurement sensor for measuring information on the filtrate dehydrated from the sludge; A calculator for calculating a moisture content of the cake by collecting information measured from the sludge measurement sensor and the filtrate measurement sensor; And a control unit for controlling a process of dewatering the sludge.

According to one embodiment, the sludge measuring sensor measures the volume, density, and concentration of the sludge to be injected, and the filtrate measuring sensor measures the volume and density of the discharged filtrate. The calculating unit calculates the volume and density of the sludge, The moisture content of the cake is measured from the density, the concentration, and the volume and density of the filtrate.

According to one embodiment, the sludge measurement sensor measures the concentration and mass of the sludge to be injected, and the filtrate measurement sensor measures the mass of the discharged filtrate, and the operation unit calculates the concentration and mass of the sludge measured, The moisture content of the cake is measured from the mass of the cake.

According to one embodiment, the sludge measuring sensor further measures the temperature of the sludge to be injected, and the filtrate measuring instrument further measures the temperature of the discharged filtrate, and the calculating section calculates the volume, density, concentration , The temperature and the moisture content of the cake from the volume, density and temperature of the filtrate.

According to an embodiment, the alarm unit further includes an alarm unit for generating an alarm when the water content of the cake measured by the operation unit is out of the setting range.

According to one embodiment, when the water content of the cake measured by the operation unit is out of the set range, the control unit stops the sludge dewatering process of the filtration apparatus.

The present invention provides a water content monitoring method using a filtration apparatus.

According to an embodiment of the present invention, A discharge filtrate measuring step; And measuring a moisture content of the cake from information measured in the sludge information measuring step and the discharged filtrate measuring step.

According to an embodiment of the present invention, the method further includes an alarm step of stopping the operation of the filtration device and generating an alarm when the water content of the cake obtained in the moisture content measurement step is out of the set range.

According to one embodiment of the present invention, by monitoring the water content of the cake in which dehydration has occurred, in real time, it is possible to detect a failure or deterioration early and to prepare for it.

The effects of the present invention are not limited to the above-mentioned effects, and the effects not mentioned can be clearly understood by those skilled in the art from the present specification and attached drawings.

1 is a perspective view showing a filter press as an example of a filtration apparatus according to the present invention.
2 is a view showing a sludge dewatering process of the filtration apparatus according to the present invention.
3 is a flow chart showing the process of the water content monitoring method according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the following embodiments. This embodiment is provided to more fully describe the present invention to those skilled in the art. The shape of the elements in the figures is therefore exaggerated to emphasize a clearer description.

Hereinafter, an example of the present invention will be described in detail with reference to FIG. 1 to FIG. The filtration device 1 according to the present invention may be various kinds of filtration devices such as a filter press, a centrifugal dehydrator, a belt press dehydrator, and a screw press dehydrator. That is, the present invention can be applied to all kinds of filtration apparatuses for dewatering a filtrate while filtering sludge and solidifying it with a cake.

In the filtration apparatus (1) according to the present invention, the sludge that has passed through the wastewater treatment system is dewatered to form a cake. The sludge contains solids, and when the sludge is dewatered, the filtrate is discharged and forms a cake.

1 is a view showing a filter press as an example of a filtration apparatus according to the present invention. 1 shows a filter press as an example of a filtration device, the filtration device according to the present invention is not limited to a filter press, and can be applied to other types of filtration devices as described above.

2 is a view showing a sludge dewatering process of the filtration apparatus according to the present invention.

1 to 2, a filtration apparatus 1 according to the present invention includes a sludge tank 10, a main body 100, a sludge injection pipe 200, a sludge measurement sensor 300, a filtrate tank 20, An outlet pipe 400, a filtrate measurement sensor 500, an operation unit 600, a control unit 700, and an alarm unit 800.

The sludge tank (10) stores the sludge that has passed through the wastewater treatment device. The sludge in the sludge tank 10 is dehydrated through the sludge inlet pipe 200 and the filter plate 110.

The main body 100 serves to dewater the sludge in the filtration apparatus 1. [ The main body 100 is connected to a sludge injection pipe 200 to be described later. The main body 100 injects sludge from the sludge injection pipe 200 to dewater the sludge.

Further, the main body 100 is connected to the filtrate discharge pipe 400 to be described later. That is, the filtrate dehydrated in the main body 100 is discharged through the filtrate discharge pipe 400.

The sludge injection tube (200) injects sludge into the main body (100). The sludge contains solids.

The sludge measurement sensor 300 measures information of the sludge injected into the filter plate 110. The information of the sludge may be the volume, density, concentration and temperature of the sludge. The measuring sensors for measuring each of them may be provided separately or may be provided as an integrated sensor for measuring them together.

Alternatively, the mass and temperature of the sludge to be injected may be measured. By measuring the temperature, it is possible to take into account the difference in density depending on the temperature, so that more accurate information measurement is possible.

The sludge measurement sensor 300 may be installed in the sludge injection pipe 200. Alternatively, the sludge measuring sensor 300 is not necessarily limited to this, and the sludge measuring sensor 300 may be installed in the main body 100. It may be installed anywhere as long as information on the sludge injected into the main body 100 can be measured before the sludge is filtered and dewatered.

The filtrate tank 20 stores the filtrate dehydrated from the sludge.

The filtrate discharge pipe 400 discharges the filtrate dewatered from the sludge to the outside. When the sludge is dehydrated through the filtration process, a filtrate is formed. The dehydrated filtrate can be discharged to the filtrate tank 20.

The filtrate measurement sensor 500 measures information of the filtrate to be discharged. The information of the filtrate may be the volume, density, temperature and concentration of the filtrate to be discharged. Each measurement sensor may be provided separately or may be provided as an integrated sensor.

Alternatively, the mass and temperature of the filtrate to be discharged may be measured. By measuring the temperature, it is possible to take into account the difference in density depending on the temperature, so that more accurate information measurement is possible.

The filtrate measurement sensor 500 may be installed in the filtrate discharge pipe 400. However, the present invention is not limited thereto, and the filtrate measurement sensor 500 may be installed in the main body 100. If it is possible to measure the information of the filtrate dehydrated from the sludge, it can be installed anywhere.

The calculating unit 600 calculates sludge information measured from the sludge measuring sensor 300 and filtrate information measured from the filtrate measuring sensor 500 and calculates a moisture content of the cake from the collected sludge information. The moisture content of a cake is the ratio of water (moisture) contained in the cake. Here, water (moisture) means that the sludge becomes a filtrate when dewatered. The calculations performed by the calculation unit 600 are mathematical, and briefly described below.

① Measure the volume and density of the sludge to be injected and determine the mass of the sludge to be injected. Alternatively, the mass of the sludge can be measured directly as described above.

② Calculate the mass of the injected solid by multiplying the sludge concentration by the sludge concentration. The concentration of sludge is the ratio of the solids contained in the sludge. That is, the concentration of sludge (mass of solid / mass of sludge) means. On the other hand, when the sludge is composed of solids and water, the mass of water = sludge mass X (100% - concentration of sludge).

③ Measure the volume and density of the filtrate to be discharged and determine the mass of the filtrate to be discharged. Alternatively, the mass of the filtrate can be measured directly.

In addition, the concentration of the filtrate may be directly measured in order to measure the solid matter that leaks out due to the breakage of the fine solid matter discharged from the filtrate or the filter cloth. Here, the solids contained in the filtrate can be obtained in the same manner as the solids contained in the sludge. That is, the filtrate concentration is multiplied by the mass of the filtrate. The concentration of the filtrate is the ratio of the solids contained in the filtrate. That is, the concentration of the filtrate means (mass of solids / mass of filtrate).

④ Mass of the injected sludge - Determine the mass of the cake from the mass of the discharged filtrate.

(5) The moisture content of the cake can be measured by 1 - {(solids injected solid - solids mass in filtrate) / cake mass}, where solids mass = (filtrate volume x density) - mass of water in the filtrate.

The control unit 700 can control the driving of the filtration device 1. [ Specifically, the controller 700 can control the sludge dewatering process of the filtration device 1. [ That is, it is possible to control the injection of the sludge into the main body 100, or to control the dewatering drive in the main body 100.

The control unit 700 receives the moisture content of the cake measured by the operation unit 600. If the moisture content of the cake is within the setting range, the present operation state of the filtration apparatus (1) sludge dewatering process can be continuously maintained and the current operation state can be changed if the water content is out of the setting range. For example, the controller 700 may stop the dewatering process. The control unit 700 can stop and terminate both the sludge injection and the main body 100 driving.

If an abnormality occurs in the filtration apparatus 1, the dehydration is not performed properly, so the water content generally increases. For example, assuming that the range of the water content during normal operation of the filtration apparatus 1, that is, the setting range of the water content ratio during normal operation is 70% or less, if the filtration apparatus 1 has an abnormality, Is shown as a value exceeding 70%.

Therefore, when the water content exceeds 70%, which is the set range, it exceeds 70%, the controller 700 can stop the sludge dewatering process of the filtration device 1. [ After the dehydration process is stopped, the administrator can start maintenance work.

The termination of the sludge dewatering process may be to stop the sludge injection into the sludge injection tube 200. Or to stop the dewatering operation in the main body 100. In this way, the sludge dewatering process can be stopped in various forms such as stopping the operation of each component to be driven or turning off the power.

The alarm unit 800 can generate an alarm when an abnormality occurs in the dewatering process of the filtration apparatus 1. [ In this case, an alarm is transmitted to the control center or the administrator. The alarm unit 800 can be operated by the control unit 700.

The terminal unit 900 is interlocked with the operation unit 600, the control unit 700, and the alarm unit 800. The terminal unit 900 can display the water content to the administrator in real time and enable the remote operation of the filtration device 1. [ That is, while the dehydration process is being performed, the water content of the cake calculated from the information of the sludge to be injected and the information of the discharged filtrate can be transmitted to the manager in real time in the time information or the auditory information. The administrator can confirm in real time whether the filtration device 1 is operating normally, while checking the water content of the filtration device 1 in real time through the terminal unit 900. When the moisture content exceeds the setting range and the alarm unit 800 generates an alarm, an alarm signal is also transmitted to the terminal unit 900. Accordingly, the terminal unit 900 generates an alarm, So that it can be recognized. In the case where a water content abnormality occurs, the administrator can stop the operation of the filtration apparatus 1 like the function of the control unit 700 through the operation of the terminal unit 900.

Hereinafter, a method of monitoring the water content of the cake in real time using the above-described filtration apparatus 1 will be described. 3 is a flow chart showing the process of the water content monitoring method according to the present invention. Referring to FIG. 3, the water content monitoring method of the present invention includes a sludge information measuring step S100, a discharged filtrate measuring step S200, a water content measuring step S300, and an alarm step S400.

In the sludge information measuring step S100, information on the sludge injected into the main body 100 is measured by using the sludge measuring sensor 300.

When the sludge is injected into the main body 100 through the sludge injection pipe 200, the sludge measurement sensor 300 installed in the sludge injection pipe 200 measures information on the sludge. As described above, the information on the sludge is the volume, density, concentration, temperature, and mass of the sludge to be injected.

In the discharge filtrate measurement step S200, information on the filtrate discharged from the main body 100 is measured using the filtrate measurement sensor 500. [

When the sludge is squeezed and dewatered to form a solid cake and the filtrate is discharged, the filtrate measurement sensor 500 installed in the filtrate discharge pipe 400 measures information on the filtrate. As described above, the information on the filtrate is the volume, density, temperature, and mass of the filtrate to be discharged.

In the moisture content measuring step (S300), the water content of the cake is measured and calculated based on the sludge information and the filtrate information. It is possible to grasp that there is a problem in the filtration apparatus 1 when the filtration apparatus 1 sets the water content at the time of normal operation and, compared with the above, the water content exceeds the setting range.

In the alarm step S400, when the moisture content measured in the moisture content measuring step S300 is out of the setting range, the control unit 700 stops the operation of the filtration device 1, and the alarm unit 800 generates an alarm . The manager can perform maintenance of the filtration apparatus 1 through this.

In the above-described embodiment, as shown in FIG. 1, the filter apparatus is a filter press. However, it is a matter of course that the filtration apparatus capable of monitoring the water content according to the present invention can be applied not only to the filter press but also to all the filtration apparatuses for dewatering the filtrate from the sludge.

The foregoing detailed description is illustrative of the present invention. In addition, the foregoing is intended to illustrate and explain the preferred embodiments of the present invention, and the present invention may be used in various other combinations, modifications, and environments. That is, it is possible to make changes or modifications within the scope of the concept of the invention disclosed in this specification, within the scope of the disclosure, and / or within the skill and knowledge of the art. The above-described embodiments illustrate the best mode for carrying out the technical idea of the present invention, and various modifications required for specific application fields and uses of the present invention are also possible. Accordingly, the detailed description of the invention is not intended to limit the invention to the disclosed embodiments. It is also to be understood that the appended claims are intended to cover such other embodiments.

1: Filtration device 10: Sludge tank
200: Sludge injection tube 300: Sludge measurement sensor
400: filtrate discharge pipe 500: filtrate measurement sensor
600: operation unit 700:
800: Alarm section

Claims (9)

A filtration device capable of monitoring the water content of a cake from which the filtrate is dehydrated from sludge,
A main body for performing a dewatering operation of the sludge;
A sludge injection pipe for injecting sludge into the main body;
A sludge measurement sensor installed in the sludge injection pipe and measuring the volume, density, and concentration of the injected sludge;
A filtrate discharge pipe for discharging the filtrate dewatered from the sludge;
A filtrate measurement sensor for measuring the volume, density, and concentration of the filtrate discharged from the filtrate discharge pipe;
The mass of the sludge is calculated by calculating the volume and density of the sludge connected to the sludge measurement sensor and the filtrate measurement sensor to calculate the volume and the density of the filtrate, The mass of the cake is obtained through the difference between the mass of the sludge and the mass of the filtrate,
The mass of the solids injected is multiplied by the mass of the sludge, multiplied by the concentration of the sludge, and the mass of the solids contained in the filtrate is obtained by multiplying the mass of the calculated filtrate by the concentration of the filtrate
An operation unit for dividing the mass of the solids contained in the sludge by the mass of the cake minus the mass of the solids contained in the filtrate, and calculating the ratio of the water content of the cake through the value obtained by subtracting 1 from the mass; And
And a control unit for controlling the process of dewatering the sludge by the main body.
The method according to claim 1,
Wherein,
If the water content of the cake measured by the operation unit is within the set range,
And changes the current operation state when the water content of the cake measured by the operation unit is out of the setting range.
delete delete 3. The method of claim 2,
The sludge measurement sensor further measures the temperature of the sludge to be injected,
The filtrate measurement sensor further measures the temperature of the discharged filtrate,
Wherein the calculation unit measures the volume, density, concentration, temperature of the sludge, and the moisture content of the cake from the volume, density, and temperature of the filtrate.
The method according to any one of claims 1, 2, and 5,
And an alarm unit for generating an alarm when the water content of the cake measured by the operation unit is out of the setting range.
The method according to claim 6,
Wherein,
And stops the sludge dewatering process of the filtration apparatus if the water content of the cake measured by the operation unit is out of the set range.
A method for monitoring the water content of a cakes in which a filtrate is dewatered from injected sludge using a filtration apparatus according to claim 1,
Measuring the volume, density, and concentration of the sludge installed in the sludge injection tube;
Measuring the volume, density and concentration of the filtrate to be dehydrated; And
The mass of the sludge is calculated by calculating the volume and density of the sludge connected to the sludge measurement sensor and the filtrate measurement sensor to calculate the volume and the density of the filtrate, The mass of the cake is obtained through the difference between the mass of the sludge and the mass of the filtrate,
The mass of the solids injected is multiplied by the mass of the sludge, multiplied by the concentration of the sludge, and the mass of the solids contained in the filtrate is obtained by multiplying the mass of the calculated filtrate by the concentration of the filtrate
A moisture content measuring step of measuring a moisture content ratio of the cake through a mass obtained by subtracting the mass of the solids contained in the filtrate from the mass of the solids contained in the sludge by the mass of the cake and subtracting the value from 1, How to monitor.
9. The method of claim 8,
And an alarm step of stopping the operation of the filtration device and generating an alarm if the moisture content of the cake obtained in the moisture content measurement step is out of the set range.

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