KR20240030824A - Slurry Density Measuring Device And Density Measuring Method Using The Same - Google Patents

Abstract

The present invention relates to a slurry density measuring device and a slurry density measuring method using the same for accurately calculating the amount of chemicals or raw materials to be added in accordance with the density of the slurry.

Description

Slurry density measuring device and slurry density measuring method using the same {Slurry Density Measuring Device And Density Measuring Method Using The Same}

The present invention relates to a slurry density measuring device for accurately calculating the amount of chemicals or raw materials to be added in accordance with the density of the slurry and a method of measuring the density of the slurry using the same.

The application field of the present invention is the injection of chemicals to separate sludge from sewage in a sewage treatment facility, or the calculation of the amount of raw material (limestone) input to the relevant facility for desulfurization in a waste incinerator or power plant using fossil fuels. It may be employed in the technical field, but it will be described as an example of measuring the density of the slurry in the desulfurization facility to calculate the quantitative amount of raw material (limestone slurry or limestone) to be re-injected or introduced into the desulfurization facility of the above-mentioned power plant. It should be understood that this is not meant to limit the scope of application of the present invention.

The flue gas discharged from the boiler of the above-described thermal power plant has nitrous acid gas removed through a denitrification facility (Korea Published Patent 10-2022-0064060), dust removed through a dust collector (Korean Published Patent 10-2022-0064060), and desulfurization. After sulfur dioxide is removed through equipment (Korean registered patent 10-1739972, 10-2016-0010926), it is discharged into the atmosphere through a stack.

The limestone introduced into the above-mentioned desulfurization facility is used as a raw material for the desulfurization reaction, and the gel-type limestone (slurry) consumed through the desulfurization reaction is manufactured as an insulation material for the inner walls of buildings.

If the amount of raw materials input for the desulfurization reaction or the amount of slurry re-supplied through circulation to the relevant facility is excessive, operating costs increase, and in the opposite case, desulfurization efficiency decreases, causing air pollution, and during the manufacturing process of the inner wall insulation material. Dehydration problems lead to irregular thickness.

Due to this problem, the amount of raw materials supplied to the facility is calculated by sampling the slurry deposited in the desulfurization facility and measuring its density. However, since there is a deviation in the measured value depending on the location where the density of the slurry is sampled, the measured value It is difficult to trust. For this reason, the input amount of raw materials is calculated by taking into account the statistics, experience, and sensory tests of accumulated measurement values.

To more objectively check the density of slurry, slurry density measuring instruments such as the CORIOUS method, MICROWAVE method, dIFF PR' method, and VIBRATION FORK method are used. However, most density measuring devices have uncertainty in measured values due to changes in flow rate, and the measurement tube's Since the pipes are clogged by slurry or are worn out irregularly, it is difficult to clearly ensure the reliability of the measured values, and there is a problem that the measuring pipes must be cleaned from time to time.

The present invention was created to solve the problems described above, and has achieved remarkable results, so this is proposed through the present invention.

The present invention seeks to provide a slurry density measuring device that can easily and clearly measure the density of a slurry and a density measuring method using the same.

The solution for realizing the purpose of the present invention is,

A chamber equipped with a discharge system equipped with pipe opening and closing means and an outlet for discharging excess water, and measurably coupled to a weight sensor;

a slurry or washing water supply system provided with respective pipe opening and closing means and connected to the chamber;

a display unit including a driving mode selection icon, a display area that displays the setting value set in the setting unit, a measured value measured by a weight sensor, and a difference value between the measured value and the zero point value;

Setting means for setting a setting value according to the operating conditions for each operation mode provided in the display unit and storing the setting value in a recording unit;

a recording unit that stores (records) the measured value of the weight sensor and the zero point value by selecting a save icon;

It is characterized by a slurry density measuring device that includes a controller that controls the supply system and discharge system with operating conditions (set values) set in the setting unit in response to the selected operation mode.

The above-described chamber includes an overwater discharge port for discharging excessive inflow water (washing water or slurry).

The above-mentioned washing water supply system is connected to a water tank with built-in water pressure, and the water tank may be further coupled with a distribution pipe equipped with a pipe opening and closing means connected between the water tank and the discharge system connected to the chamber.

In this way, the slurry remaining in the interior of the chamber and the discharge system of the chamber can be cleaned.

The above-described pipe opening and closing means may be a pneumatic or electronic solenoid valve (hereinafter abbreviated as “sol valve”), and may be controlled by a controller according to the selection of an operation method provided on the display unit.

The above-described display unit is a touch pad and includes an icon for selecting a driving mode, a display area for displaying set values according to driving conditions, and an area for displaying measured values, average values, and zero values.

The above-mentioned controller controls the opening and closing of the corresponding pipe so that sludge or washing water flows into the chamber until the operating conditions according to the selected operation mode are satisfied.

The above-mentioned weight sensor may be composed of a plurality, and the measured values of the plurality of weight sensors are calculated as an average value by the calculation unit (coprocessor), and the calculated average value is displayed in real time on the display unit, and when the set time is reached, it is displayed in the recording unit. It can be recorded to be included in the same index file name.

The above-described chamber may further include means (hereinafter, zero point setting means) for setting a standard value (hereinafter, “zero point value (calibration)”) for the weight of the chamber.

An example of the above-mentioned zero point setting means can be implemented by adjusting the height of the volume in the water to match the weight value set in the recording book and recording the measured value as a zero point value in the recording book.

In another example, this can be implemented by repeatedly measuring the weight of a chamber at the same water level and recording the average value as a zero value in the recorder.

The aforementioned operation mode may be any one of “automatic measurement, cleaning, and zero point setting.”

The above-described controller may be a PLC (Programmable Logic Controller) equipped with control logic that can control the above-described pipe opening and closing means according to the operating conditions according to the above operation mode.

The measured value measured by the above-described weight sensor may be calculated as an average value by the above-described calculation unit and recorded in the recording unit, and the average values recorded in the recording unit may be calculated as an average value by the above-described calculation unit and displayed on the display unit. The average value can be set to zero in the log by selecting the “Save” icon.

The above-described setting values can be updated in the recorder through the input means of the display unit.

The above-mentioned setting values include the opening and closing time of the pipe opening and closing means, the number of times to measure, the number of times to wash, the time to measure, and the time to drain.

Among the set values, a digital timer may be employed as a driving means related to time.

The above-described recording unit may employ a hard disk.

The present invention provides a measuring device that sets the weight value of the washing water corresponding to the water level set in the chamber to the zero point value and measures the density of the slurry using the difference value of the weight value of the slurry at the water level corresponding to the zero point value. do.

In addition, since the inside of the chamber and the discharge system can be cleaned, the present invention not only eliminates the problem of clogging of the measuring tube as in conventional measuring devices, but also provides a reliable slurry density measuring device.

1 is a front view of a slurry density measuring device according to the present invention.
FIG. 2 is a rear view of the measuring device shown in FIG. 1, of which FIG. 2a is a view showing a machine room equipped with a washing water distribution device, and FIG. 2b is a view viewed from the side of FIG. 2a.
Figure 3 is a right side view of the measuring device shown in Figure 1.
FIG. 4 is a perspective view showing the chamber of the machine room seen from the plane of the measuring device shown in FIG. 1.
FIG. 5 is a cross-sectional view illustrating a chamber of the measuring device shown in FIG. 1.
FIG. 6 is a diagram illustrating a supply system for selectively supplying slurry or washing water into the chamber and a weight sensor for measuring the weight of the chamber among the measuring devices shown in FIG. 5.
Figure 7 is a diagram showing an excerpt of the washing water distribution device shown in Figure 2.
Figure 8 is a rear view of the chamber shown in Figure 5.
Figure 9 is a top view of the chamber shown in Figure 6.
FIG. 10 is a main sectional view showing the zero point setting device mounted on the chamber shown in FIG. 6.
Figure 11 is an enlarged view showing part A of Figure 5.
FIG. 12 is a block diagram showing the main configuration of the operation unit shown in FIG. 1.
FIG. 13 is a surface view showing the operation unit shown in FIG. 1.

In this specification, terms such as include, comprise, have, etc. are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

When a component is described as being connected, coupled, or mounted to another component, it may be directly connected to or coupled to that other component, but it also means that other components may be present in between. It can be understood.

In this specification, terms according to components according to embodiments are used only to describe illustrative embodiments, and are not limited to those terms. Additionally, singular expressions should be understood to include plural expressions, unless the context clearly indicates otherwise.

In addition, it should be understood that all conditional terms and examples listed in this specification are, in principle, merely described to facilitate easier explanation and understanding of the concept of the present invention and do not limit the illustrative examples.

Hereinafter, a preferred embodiment of the slurry density measuring device according to the present invention will be described in detail with reference to the attached drawings.

As shown in FIGS. 1 to 5, the slurry density measuring device 100 according to the present invention is installed in the cabinet 101.

The operating unit 110 is disposed on the front of the above-described cabinet 101, and the inside thereof is divided by a partition wall 102 (FIGS. 2 to 4) and has machine rooms (not indicated) in which doors (not indicated) are installed. It is provided.

In the above-described machine room, a slurry density measuring device 100 (FIGS. 4 and 5) and a water tank 151 for supplying washing water (FIG. 2) are installed.

The above-described slurry density measuring device 100 is equipped with an outlet 122b for discharging the amount of water flowing in above a certain level, as shown in FIGS. 5 and 8, and is measured by a weight sensor 140 fixed in the machine room. a chamber 121 possibly mounted;

Independently equipped with pipe opening and closing means (v1, v2, Figure 2), supply systems (S, W) for selectively supplying slurry or washing water into the above-described chamber 121, and a selected operation method and setting value Correspondingly, it includes a controller 200 that selectively controls the pipe opening and closing means (v1, v2, v3, FIG. 2).

The ends of the above-described supply systems (S, W) are connected within the chamber 121 in a non-contact manner so that their own weight is not applied to the chamber 121.

For reference, all pipe opening and closing means defined in the present invention can be either electric or pneumatic solenoid valves, and the opening and closing of the pipe is controlled (On/Off) by the controller 200.

The above-described chamber 121 is an empty container as shown in FIGS. 5, 8, and 9, and has a discharge system (124, FIG. 5) connected to the cover (121a, FIG. 8) and the overwater discharge port (122b). Including, the discharge system 124 is connected to the overwater discharge port 122b in a non-contact manner so that the dead weight of the discharge system 124 is not applied to the chamber 121.

The above-described chamber 121 is loaded on the weight sensor 140 through a connecting member `121b coupled to the chamber 121, as shown in FIGS. 5, 8, and 9, and the weight sensor 140 As shown in FIG. 6, is coupled to a bracket (FIG. 6, not indicated) fixed to the inner wall of the cabinet 101.

Therefore, the weight of the chamber 121 is measured by the weight sensor 140 while it is fixed in the air.

The above-mentioned weight sensor 140 may be employed in plurality as shown in FIGS. 4 and 5, and the measured values measured by the plurality of weight sensors are calculated as an average value by the calculation unit 207 and displayed on the display unit 201. is displayed, and when the set time has elapsed, it is recorded in the recorder 206 along with date information and measurement count value within the same index file name.

The measured values recorded in the above-described recording unit 206 are calculated in real time by the calculating unit 207 and the average value is displayed in the zero value display area 113 of the display unit 201, and the average value displayed in the corresponding area 113 is " The zero value can be set in the recording unit 206 by selecting (On) the “Save” icon. In other words, the weight measurement value of the chamber corresponding to the set water level can be set to zero.

The above-described discharge system is equipped with a pipe opening and closing means controlled by a controller as shown in FIGS. 5 and 12, and includes a main drain (124a) communicating with the drain 123 provided in the above-described chamber and the above-described overwater discharge port (122b). ) may include a bypass outlet (124b) in communication with.

Additionally, the bypass outlet 124b described above may be separated so as not to meet the main drain 124a. Therefore, excess water flowing into the chamber 121 can be immediately discharged out of the cabinet along the bypass outlet 124b.

As shown in FIGS. 5 and 8, a plurality of the above-described overwater discharge ports 122b may be provided in the chamber at different heights.

In this way, even if an excessive amount of slurry or washing water flows into the chamber at once, it is immediately discharged through both outlets 122b, so it can quickly reach the water level to be measured. This means the effect of shortening the time to set the zero point value of the chamber.

Meanwhile, the end of the distribution pipe connected to the water tank may be located at the connection portion in communication with the above-described discharge system 124 and the chamber, and more preferably, the nozzle (Z1) is coupled to the end of the distribution pipe to form the nozzle (Z1). Through this, the slurry remaining around the drain 123 and the overwater outlet 122b can be washed.

As shown in FIGS. 2 and 7, the washing water distribution device 150 is equipped with a water tank 151 with built-in water pressure and pipe opening and closing means (V1, V2, FIGS. 2 and 4), and the water tank 151, 2) and the chamber 121 (FIG. 5), the washing water supply system (c1) is connected between the above-described nozzle (Z1) and the water tank 151, and the pipe is controlled by the controller 200. It includes distribution pipes (c2 to c4) equipped with solvent valves (s1 to s3, Figure 7).

As shown in FIG. 13, the controller 200 described above may be a PLC (Programmable Logic Controller) equipped with control logic programmed to perform operating conditions (setting values) according to the operating method selected by the user.

The above-mentioned display unit 201 includes a display unit 201, a setting unit 203, a recording unit 206, an operation unit 207, and a digital timer (not shown in the drawing) that are circuitously connected to a printed circuit board (not shown in the drawing). ) includes.

The above-described display unit 201 is a touch pad, and as shown in FIG. 14, the operation mode selection of “automatic measurement, cleaning, and zero point setting” is displayed on the surface of the touch pad, and the controller (start) and stop of the selected operation mode is displayed. 200), a display area where each set value (operating condition) set in the setting unit 203 is output (this is referred to as the “set value display area 113”), and a weight sensor ( 140), a “measurement value display area 115” in which the average value calculated by the calculation unit 207 is displayed, and a display area in which operation information corresponding to the set value is displayed (this is called “operation a “status display area 114”), an average value display area (referred to as an “average value display area 116”) in which the average value of the measured values recorded in the recording unit 206 by the calculating unit 207 is displayed, It includes an icon 116a for storing the value displayed in the average value display area 116 in the recorder.

The above-described icon 112 can control the controller 200 through selection of an operation mode of the slurry density measuring device 100 and execution (start) and stop of the selected operation mode.

The above-mentioned setting unit 203 sets values preset by the user, that is, the number of measurements, the time to supply the washing water or slurry (opening time of the pipe opening and closing means), the weight value of the slurry or washing water, the time for the weight sensor to measure the weight, It includes means for setting the time to drain the washing water in the chamber (pipe opening and closing means) and the time to clean the chamber 121 (opening time of the pipe opening and closing means). As a preferred embodiment, the control of the controller 200 When programming logic, the above-described setting values can be programmed to be specified or a form for entering the above-mentioned setting values into the display unit 201 and a touch keyboard (not shown in the drawing) for entering values into the form. It can be set by loading the form on the screen (loading icon not shown in the drawing), entering values in each input box of the form, and storing them in the recorder 206.

The above-mentioned calculation unit 207 is a coprocessor that can perform real-time arithmetic on the measured values measured in real time by the weight sensor 140 and the values recorded in the recorder 206 into an average value, and the calculated measured values and average values are as described above. Each is output to the measured value display area 115 and the average value display area 116, and the value appearing in the average value display area 116 is entered as a “zero value” in the recorder 206 by setting the save icon 116a (On). It can be saved.

The information displayed in the above-mentioned operating status display area 114 includes the number of measurements compared to the set value, the remaining time to supply slurry, the measured weight value, the remaining time to measure, the remaining time to drain, the remaining time to wash, and the number of times to wash. can be displayed.

The above-described recording unit 206 is a recording device such as a hard disk, and stores setting values for controlling the above-described driving unit 204, measured values for each number of measurements, and the average value displayed in the average value display area 116.

The driving unit 204 shown in FIG. 13 is a general term for all pipe opening and closing means defined in the present invention.

The above-mentioned digital timer can set the operating time of the driving unit differently according to the operation mode selected in the icon 112, and is output to the display unit 201 in a way that counts down in reverse based on the set time, and the set time expires. When this happens, a termination signal is transmitted to the controller 200, and the controller controls (Off) the relevant pipe opening and closing means.

The above-mentioned measurement unit 205 is a general term for the single or plural weight sensors 140 described above. The measured value measured in real time by the weight sensor 140 is calculated as the average value by the calculation unit 207 and displayed on the display ( 201), and when the set measurement time is completed, the final measured value is recorded in the recorder 206.

The above-described controller 200 controls (On/Off) the driving unit 204 according to the operating conditions of the setting unit 203 for each operation mode among the icons 112.

The control process of the above-described controller 200 will be described.

First, select and execute (start) the “Zero point setting” mode in the icon (112) area.

The controller 200 controls (On) the pipe of the sol valve (V2) to be opened for the time set in the digital timer.

In this way, the washing water is supplied into the chamber 121 only for a set time, and the excessively flowing water, that is, the overwater flowing higher than the position of the overwater outlet (122b), naturally flows through the outlet (122b). It is maintained for the set time to be discharged in a nonpressure flow manner. In this way, when the set time elapses, only a certain amount of water remains in the chamber 121.

When the set time elapses, the number of measurements made by the weight sensor 140, the measurement value, and time information are recorded in the recorder 206 to be included in the index file name, and the controller 200 causes the sol valve s3 to be opened. Control (On) for the set drainage time.

In this way, all of the washing water (water) stored in the chamber 121 is drained through the discharge system 124.

The above-mentioned washing water weight measurement and drainage process repeatedly controls the pipe opening and closing means described above by the controller until the set number of measurements is satisfied.

The average value of the values measured by the weight sensor while repeatedly performed is sequentially recorded in the index file name together with the number of measurements in the recording unit 206, and the calculation unit 207 records the average value of all the measured values recorded in the index file name. It is calculated and output to the average value display area 116.

At this time, when the “save icon” 116a is executed, the value output in the average value display area 116 is set (recorded) as a zero value in the recording unit 206. This zero point value is used as a value to contrast with the measured value by slurry density measurement and can be displayed in the display unit of the difference between the measured value (sludge measured value) compared to the zero point value.

Above, a method of programmatically setting the zero point value of the slurry density measuring device 100 was described. However, as shown in FIGS. 5 and 10, a volume body 134 with a predetermined volume is installed in the chamber 121. After adjusting the weight of the chamber 121 containing the washing water by finely adjusting the height of the volume body 134 so that it reaches the preset weight value of the chamber 121, the measured value is recorded as a zero value in the recorder 206 by the method described above. It can be implemented by recording.

In this case, the slurry flows into the chamber 121 while the volume body 134 located in the chamber 121 is maintained and is measured by the weight sensor.

In FIG. 10, reference numeral 131 is a knob, 132 is a screw shaft, 133 is a nut coupled to the cover of the chamber 121 and the screw shaft is screwed, and 134 is a volume body 134 with an airtight interior.

When setting (selecting) the “washing” mode in the area of the icon 112 described above, the controller 200 controls (On) the pipes of the sol valves (v2, v3, s1 to s3) to be opened for a set time to maintain the washing water supply system. Washing water is supplied to the connection area between the chamber and the discharge system to clean it, and when the set time has elapsed, the piping of the sol valves (v2, v3, s1 ~ s3) is controlled to close, thereby establishing communication between the inside of the chamber 121 and the discharge system. The slurry remaining in the connection part of the pipe can be cleaned.

The above-described process is repeatedly performed until the number of washing times set in the setting unit is satisfied.

And, when setting (selecting) the “automatic measurement” mode in the area of the icon 112 described above, the controller 200 controls (On) the pipe of the sol valve (v1) to be open for the time set in the digital timer described above, and slurry The weight sensor 140 measures the weight of the slurry flowing into the chamber along the supply system and outputs the measured value to the measured value display area. When a set time has elapsed, the final measured value is recorded in the recorder 206, The controller 200 controls the pipe of the sol valve (v1) to be closed.

At this time, if the amount of slurry introduced into the chamber 121 is excessive, it is discharged along the discharge system 124 for a set time. Therefore, only the amount of slurry corresponding to the zero water level remains in the chamber 121, and when the time set in the digital timer has elapsed, the measured value is recorded in the recorder in the same manner as described above, and the controller 200 records the sol valve (S3). ) is controlled (On) so that the pipe is open for the set drainage time.

In this way, all of the slurry contained in the chamber 121 is discharged along the discharge system 124.

Accordingly, the difference between the measured value of the chamber containing the slurry compared to the zero point value set in the recording unit 206 is calculated by the calculating unit and output in the display unit.

The density of the slurry can be determined through the above difference value.

When operating the measuring device in the above-described “automatic measurement” mode, the control logic of the controller can be programmed to proactively perform the above-mentioned “cleaning” mode. In this way, the weight of the chamber is measured after cleaning is completed, thereby increasing the precision of the measurement value.

As described above, the present invention can be employed in various industrial fields that require measurement of the density of slurry in addition to the technical field.

Meanwhile, each display area of the above-described display unit has been described separately to facilitate understanding, but since its location or output form may be changed, it is sufficient that at least the values output within each display area are provided within the display unit.

In the above, preferred embodiments of the slurry density measuring device and its measuring method according to the present invention have been described in detail with reference to the attached drawings, but the described embodiments are only technical for the principles adopted to implement the problem of the present invention. It is only presented for the purpose of increasing thought and understanding, and anyone with ordinary knowledge in the technical field to which the present invention pertains will be able to make various modifications or application examples, but this does not reflect the true technical idea pursued by the present inventor. This is to clarify in advance that it is included in the scope of the patent claims defined in .

Claims (5)

A chamber equipped with a discharge system equipped with pipe opening and closing means and an outlet for discharging excess water, and measurably coupled to a weight sensor;
a slurry or washing water supply system provided with respective pipe opening and closing means and connected to the chamber;
a display unit including a driving mode selection icon, a display area that displays the setting value set in the setting unit, a measured value measured by a weight sensor, and a difference value between the measured value and the zero point value;
Setting means for setting a setting value according to the operating conditions for each operation mode provided in the display unit and storing the setting value in a recording unit;
a recording unit that stores the measured value of the weight sensor and a zero point value by selecting a save icon;
A slurry density measuring device comprising a controller that controls the supply system and discharge system with operating conditions (set values) set in the setting unit in response to the selected operation mode.
According to paragraph 1,
A slurry density measuring device, characterized in that a nozzle connected to a water tank is further coupled to a connection portion in communication with the discharge system.
According to paragraph 1,
A slurry density measuring device, characterized in that a plurality of overwater discharge outlets are coupled to the chamber at different heights.
When setting automatic measurement mode
The controller is,
Controls (On) the pipe of the sol valve (v1) to be open for a set time, measures the weight of the slurry flowing into the chamber through the slurry supply system with the weight sensor 140, and outputs the measured value to the display in real time. Steps and;
When the set time has elapsed, the final measurement value is recorded in the recorder 206, the pipe of the sol valve (v1) is controlled (Off) to be closed, and the pipe of the sol valve (v3) is controlled to be open for the set drain time (Off). On) step and;
A density measurement method of a slurry density measuring device, characterized in that it consists of outputting the difference between the measured value of the chamber and the zero point value set in the recording unit by the calculation unit to the display unit.
According to paragraph 3,
When setting the washing mode, the controller
The pipes of the sol valves (v2, v3, s1~s3) are controlled (On) to be open for a set time, and the sol valve is cleaned by supplying wash water to the connection area between the chamber and the discharge system through the wash water supply system. When the set time has elapsed, the sol valve is cleaned. Density measurement method of a slurry density measuring device, characterized in that the pipes of (v2, v3, s1 to s3) are controlled to be closed.

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