KR20190142836A - Apparatus for measuring total phosphorus and total nitrogen - Google Patents

Abstract

According to an embodiment of the present invention, provided is an apparatus for measuring total phosphorus and total nitrogen, capable of improving maintenance convenience and predicting the malfunction of a component. The apparatus includes a first treatment part, a second treatment part and a measurement part. The first treatment part includes: a plurality of first inflow paths into which a first sample and a plurality of first reagents flow; a first branch channel selectively opening or closing the first inflow paths; a first syringe module enabling the first sample and at least one of the first reagents, which flow in quantitively through the first branch channel, to be created as a first measurement sample through pretreatment; and a first supply path supplying the first measurement sample. The second treatment part includes: a plurality of second inflow paths into which a second sample and a plurality of second reagents flow; a second branch channel selectively opening or closing the second inflow paths; a second syringe module enabling the second sample and at least one of the second reagents, which flow in quantitively through the first branch channel, to be created as a second measurement sample through pretreatment; and a second supply path supplying the second measurement sample. The measurement part measures total phosphorus from the first measurement sample supplied through the first supply path, and measures total nitrogen from the second measurement sample supplied through the second supply path.

Description

Total phosphorus and total nitrogen measuring device {APPARATUS FOR MEASURING TOTAL PHOSPHORUS AND TOTAL NITROGEN}

The present invention relates to a total phosphorus and total nitrogen measurement apparatus, and more particularly to a total phosphorus and total nitrogen measurement apparatus that can improve the maintenance convenience, and can predict the failure of parts.

In general, phosphorus (P) and nitrogen (N) components in the field of environmental water quality are known to be the main cause of the rapid growth of algae in the summer due to eutrophication.

The eutrophication is a salt, such as nitrate, ammonia, phosphate flows into rivers, rivers, lakes and the like to release nutrients (nitrogen, phosphorus) in the water, the growth of phytoplankton in water rich in nutrients The breeding process is very rapid, causing a red tide phenomenon in which a large amount of phytoplankton grows and turns black in a short time.

This eutrophication reduces the aesthetic value of rivers or streams due to the growth of adherent algae, and in the case of using river or river waters as monastic waters, the filter paper is closed during tap water production. It can also be a cause.

In addition, high-end fish species are extinguished, fish are less economically valuable, and when large quantities of algae or aquatic plants die, they rapidly decompose, produce odors, consume large amounts of dissolved oxygen, and multiply algae to other organisms. Deteriorates water quality by producing inhibitors that affect it.

In addition to inorganic carbon, the growth of algae or aquatic organisms due to eutrophication includes nitrogen (N), phosphorus (P), iron (Fe), magnesium (Mg), potassium (K), sodium (Na), sulfur (S), Salts such as calcium (Ca) are required, and in addition, molybdenum (Mo), cobalt (Co), manganese (Mn), zinc (Zn), copper (Cu) and the like may be required. Except for the relatively large amount of components needed are phosphorus (P) and nitrogen (N).

Therefore, the water quality measuring device for measuring the amount of phosphorus (P) and nitrogen (N) contained in the water has been used for continuous water quality management in consideration of the river's self-cleaning ability.

The water quality measuring device automatically measures the water quality in real time and transmits the result value to a control center or a smart phone, thereby real-time monitoring of water quality.

 The water quality measuring devices used in Korea are most applied to the monitoring of sewage or wastewater treatment plant effluent, and the monitoring items are pH (hydrogen ion concentration), SS (floating matter), COD (organic matter), TN (total nitrogen) and TP ( If the water quality measurement value of the water quality measuring instrument exceeds the water quality standard, a fine will be imposed.

The total phosphorus and total nitrogen measuring instruments used in Korea operate the respective measuring instruments to monitor the total phosphorus and total nitrogen. In the case of operating the total phosphorus and total nitrogen measuring instruments, the space occupied by the measuring instrument is 2 to 3 times more than the total phosphorus and total nitrogen measuring instruments, and the purchase cost of the measuring instrument is about 1.5 to 2 times more expensive than the simultaneous measuring instrument.

In addition, the measuring equipment for monitoring the discharged water quality of sewage and wastewater treatment plants is a system that operates continuously for 365 days, depending on the system, at least two to four days in the event of parts failure. System must be stopped). This can lead to the situation that can not monitor the water quality, and eventually there is a limit to the accurate monitoring of the water quality discharged from the sewage and wastewater treatment plant.

Republic of Korea Patent No. 1194333 (2012.10.24. Notification)

In order to solve the above problems, the technical problem to be achieved by the present invention is to provide a total phosphorus and total nitrogen measuring apparatus that can improve the maintenance convenience, predict the failure of the parts.

The technical problem to be achieved by the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned above may be clearly understood by those skilled in the art from the following description. There will be.

In order to achieve the above technical problem, an embodiment of the present invention provides a plurality of first inflow passages through which a first sample sample and a plurality of first reagents are respectively introduced, and are connected to the plurality of first inflow passages. At least one of a first branch channel for selectively opening and closing a first inflow channel, the first sample sample and the plurality of first reagents connected to the first branch channel and quantitatively introduced through the first branch channel are pretreated. A first processing module having a first syringe module connected to the first branch channel and supplying the first measurement sample so that the total phosphorus is measured to be generated as the first measurement sample; A plurality of second inflow passages through which a second sample sample and a plurality of second reagents are respectively introduced, a second branch channel connected to the plurality of second inflow passages to selectively open and close the plurality of second inflow passages; A second syringe module connected to the second branch channel and at least one of the second sample sample and the plurality of second reagents quantitatively introduced through the second branch channel to be pre-processed to generate a second measurement sample; A second processor connected to the second branch channel and having a second supply passage for supplying the second measurement sample so that total nitrogen is measured; And the second measurement sample connected to the first supply channel and the second supply channel and measuring total phosphorus from the first measurement sample supplied through the first supply channel, and supplied through the second supply channel. It provides a total phosphorus and total nitrogen measuring apparatus including a measuring unit for measuring the total nitrogen from.

In an embodiment of the present invention, the measuring unit accommodates a first receiving cell in which the first measurement sample supplied through the first supply passage is accommodated, and the second measurement sample supplied through the second supply passage. A second light receiving cell, a light source for generating light, a light reflector provided between the first light receiving cell and the second light receiving cell, reflecting light emitted from the light source, and rotating the light reflector. A motor for changing the path of the light irradiated from the first accommodation cell or the second accommodation cell, a first output unit calculating a concentration of total phosphorus based on the amount of light passing through the first measurement sample; And, it may have a second calculation unit for calculating the concentration of total nitrogen based on the amount of light passing through the second measurement sample.

In one embodiment of the present invention, the measuring unit may be provided between the reflector and the first receiving cell, and may have a first band filter passing only light having a wavelength of 880 nm among the light reflected from the reflector.

In an embodiment of the present invention, the measurement unit may be provided between the reflector and the second receiving cell, and may have a second band pass filter that passes only light having a wavelength of 220 nm among the light reflected from the reflector.

In one embodiment of the present invention, one end is connected to the first variable valve connected to the first supply passage, the other end is connected to the connection channel connected to the second variable valve connected to the second supply passage, the connection The first measurement sample or the first measurement channel connected to the flow path and connected to the third inflow path and remaining in the first supply path by the operation of the first variable valve and the second variable valve; A cleaning unit having a pump for selectively sucking the second measurement sample remaining in the supply passage, and a discharge passage connected to the pump and discharging the first measurement sample or the second measurement sample sucked into the pump; It may include.

In an embodiment of the present invention, a first measurement measured by the measuring unit when the first processing unit stops supplying the first sample sample and supplies only the first distilled water of the plurality of first reagents at a first time point. Comparing the amount of light and the second measured light quantity measured by the measuring unit when the first processor stops supplying the first sample sample and supplies only the first distilled water again at a second time different from the first time point. And a first determination unit determining that the light source of the measurement unit needs to be replaced when the first measurement light amount and the second measurement light amount deviate from a first allowable error range.

In an exemplary embodiment of the present invention, a third measurement measured by the measuring unit when the second processing unit stops supplying the second sample sample and supplies only the second distilled water of the plurality of second reagents at a third time point. Comparing the amount of light and the amount of fourth measured light measured by the measuring unit when the second processing unit stops supplying the second sample sample and supplies the second distilled water again at a fourth time different from the third time point. The first determination unit may include a first determination unit determining that the light source of the measurement unit needs to be replaced when the third measurement light amount and the fourth measurement light amount deviate from a second allowable error range.

In an embodiment of the present invention, a first included in the first syringe module to generate a suction force for quantitatively introduced into the first branch channel of at least one of the first sample and the plurality of first reagents In order to control the driving of the plunger, the number of first command pulses added during the first period and the actual measured first measurement pulses added during the first period are compared, and the sum of the first command pulses and the sum of the first command pulses. The second determination unit may determine that the replacement of the first plunger is necessary when the number of the first measurement pulses is outside the third allowable error range.

In an embodiment of the present invention, a second included in the second syringe module to generate a suction force for quantitatively introduced into the second branch channel at least one of the second sample sample and the plurality of second reagents In order to control the driving of the plunger, the number of second command pulses summed over the second period and the actual measured second measurement pulses summed over the second period are compared, and the sum of the second command pulses summed and summed The second determination pulse may include a second determination unit determining that the replacement of the second plunger is necessary when the number of the second measurement pulses is out of the fourth allowable error range.

According to the embodiment of the present invention, since the first processing unit and the second processing unit are configured independently of each other, even if one processing unit fails, the other side can be operated. Measurement of water quality may be possible.

In addition, according to an embodiment of the present invention, by using a single light source, and by changing the path of the light irradiated from the light source using a single reflector, it is possible to measure the total phosphorus or total nitrogen. This reduces maintenance and reduces the use of parts, while reducing the cost of replacing parts.

In addition, according to an embodiment of the present invention, the first determination unit is to supply only distilled water to measure the amount of light measured at different points in time and compare them with each other, and if the comparison result is outside the tolerance range, it is necessary to replace the light source of the measuring unit. It can be determined. Also, in order to control the operation of the plunger, the second judging unit compares the sum of the command pulses and the actually measured measurement pulses over a period of time, and if the sum of the command pulses and the measured measurement pulses is outside the tolerance range, It may be determined that replacement of the plunger is necessary. Through this, the user may know when the light source and the plunger need to be replaced, and by replacing the parts that need to be replaced, the operation rate of the total phosphorus and total nitrogen measuring device may be secured, and accurate water quality monitoring may be possible.

It is to be understood that the effects of the present invention are not limited to the above effects, and include all effects deduced from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a block diagram showing a total phosphorus and total nitrogen measuring apparatus according to an embodiment of the present invention.
Figure 2 is a flow diagram showing a total phosphorus and total nitrogen measuring apparatus according to an embodiment of the present invention.
3 and 4 is an exemplary view showing a measuring unit of the total phosphorus and total nitrogen measuring apparatus according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to be "connected (connected, contacted, coupled)" with another part, it is not only "directly connected" but also "indirectly connected" with another member in between. Also includes the case where In addition, when a part is said to "include" a certain component, this means that unless otherwise stated, it may further include other components rather than excluding the other components.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, the terms “comprise” or “have” are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

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

1 is a block diagram showing a total phosphorus and total nitrogen measuring apparatus according to an embodiment of the present invention, Figure 2 is a flow chart showing a total phosphorus and total nitrogen measuring apparatus according to an embodiment of the present invention, Figure 3 and Figure 4 is an exemplary view showing a measuring unit of the total phosphorus and total nitrogen measuring apparatus according to an embodiment of the present invention.

First, as shown in FIGS. 1 and 2, the total phosphorus and total nitrogen measuring apparatus may include a first processing unit 100, a second processing unit 200, and a measuring unit 300.

The first processor 100 may have a first inflow channel 130, a first branch channel 140, a first syringe module 150, and a first supply channel 160.

The first inflow passage 130 may be provided in plurality, and each first inflow passage 130 may be connected to the first sample sample 110 and the plurality of first reagents 120.

The first sample sample 110 refers to a sample collected from sewage or sewage, and may be accommodated in the first reservoir 111.

The plurality of first reagents 120 include ascorbic acid 121, potassium persulfate 122, P-standard solution 123, first wash water 124, first distilled water 125, and ammonium molybdate 126. Ascorbic acid (121), potassium persulfate (122), P-standard solution (123), the first washing water (124), the first distilled water (125) and ammonium molybdate (126) Each may be housed in a separate container.

The first branch channel 140 may be connected to the plurality of first inflow passages 130. The first branch channel 140 may have a plurality of channels, and each first inflow channel 130 may be connected to each channel. The first branch channel 140 may selectively open and close the plurality of first inflow passages by opening and closing each channel.

The first air channel 131 may be further coupled to the first branch channel 140 so that air is introduced or discharged.

The first syringe module 150 may be connected to the first branch channel 140. The first syringe module 150 may allow one or more of the first sample sample 110 and the plurality of first reagents 120 to be quantitatively introduced into the first branch channel 140.

The first syringe module 150 may have a first plunger 151. The first plunger 151 may generate a suction force for quantitatively introducing one or more of the first sample sample 110 and the plurality of first reagents 120 into the first branch channel 140.

At least one of the first sample sample 110 and the plurality of first reagents 120 may be quantitatively introduced through the first branch channel 140 and supplied to the first syringe module 150.

The first syringe module 150 performs a pretreatment process for applying an appropriate reagent from the first sample 110 and the first reagent 120 to the first sample 110 to measure the total phosphorus. The measurement sample S1 may be generated. That is, the first measurement sample S1 may refer to a sample that is appropriately pretreated by applying the first reagent 120 to the first sample sample 110 so that the total measurement can be performed by the measurement unit 300.

Referring to the pretreatment process for generating the first measurement sample (S1), first the first sample sample 110 and potassium persulfate 122 through the first inflow passage 130 as the oxidant first syringe module ( 150). The first sample 110 and the potassium persulfate 122 may be mixed and heated for 29 to 31 minutes at a temperature of 115 to 125 ° C. to decompose the organic matter. Subsequently, ascorbic acid is reacted with ammonium molybdate 126 supplied through the first inflow channel 130 through a cooling process to form ammonium molybdate, and is supplied through the first inflow channel 130 ( 121), the compound which is molybdenum blue may be obtained, and the compound which is molybdenum blue may be the first measurement sample S1.

The first measurement sample S1 may be supplied to the first supply passage 160 through the first branch channel 140.

The first supply channel 160 may be connected to the first branch channel 140, and may supply the first measurement sample S1 preprocessed to measure the total phosphorus to the measurement unit 300.

The first supply passage 160 may be provided with a first variable valve 161. The first variable valve 161 may be provided at the front end of the measuring unit 300 so that the first measuring sample S1 supplied through the first supply passage 160 selectively enters the measuring unit 300. Can be controlled. The first variable valve 161 may be a 3-way valve.

The second processor 200 may have a second inflow passage 230, a second branch channel 240, a second syringe module 250, and a second supply passage 260.

The second inflow passage 230 may be provided in plurality, and each second inflow passage 230 may be connected to the second sample sample 210 and the plurality of second reagents 220.

The second sample sample 210 may mean a sample taken from sewage or sewage, and may be accommodated in the second reservoir 211. The second sample sample 210 may be the same as the first sample sample 110.

The plurality of second reagents 220 may include hydrochloric acid 221, alkaline potassium persulfate 222, N-standard solution 223, second wash water 224, and second distilled water 225. 221, the alkaline potassium persulfate 222, the N-standard solution 223, the second washing water 224, and the second distilled water 225 may be accommodated in separate containers.

The second branch channel 240 may be connected to the plurality of second inflow passages 230. The second branch channel 240 may have a plurality of channels, and each second inflow channel 230 may be connected to each channel. The second branch channel 240 may selectively open and close the plurality of second inflow passages by opening and closing each channel.

The second air channel 231 may be further coupled to the second branch channel 240 so that air is introduced or discharged.

The second syringe module 250 may be connected to the second branch channel 240. The second syringe module 250 may allow one or more of the second sample sample 210 and the plurality of second reagents 220 to be quantitatively introduced into the second branch channel 240.

The second syringe module 250 may have a second plunger 251. The second plunger 251 may generate a suction force for quantitatively introducing one or more of the second sample sample 210 and the plurality of second reagents 220 into the second branch channel 240.

One or more of the second sample sample 210 and the plurality of second reagents 220 may be quantitatively introduced through the second branch channel 240 and supplied to the second syringe module 250.

The second syringe module 250 performs a pretreatment process for applying an appropriate reagent from the second sample 210 and the second reagent 220 to the second sample 210 to measure the total nitrogen. Two measurement sample (S2) can be generated. That is, the second measurement sample S2 may refer to a sample that is appropriately pretreated by applying the second reagent 220 to the second sample sample 210 so that the total nitrogen can be measured by the measurement unit 300.

Referring to the pretreatment process for generating the second measurement sample (S2), first, the second sample sample 210 and the alkaline potassium persulfate 222 through the second inflow passage 230, the second syringe module 250 ) Can be supplied. The second sample sample 210 and the alkaline potassium persulfate 222 may be mixed and heated for 29 to 31 minutes at a predetermined temperature to decompose inorganic nitrogen and organic nitrogen compounds and oxidize the nitrate ions. Thereafter, the mixture is cooled to room temperature and adjusted to acid by hydrochloric acid 221 supplied through the second inflow passage 230, and the state adjusted to acid by hydrochloric acid 221 is the second measurement sample (S2). Can be

The second measurement sample S2 may be supplied to the second supply passage 260 through the second branch channel 240.

The second supply channel 260 may be connected to the second branch channel 240, and may supply the second measurement sample S2 preprocessed to measure total nitrogen, to the measurement unit 300.

The second supply passage 260 may be provided with a second variable valve 261. The second variable valve 261 may be provided at the front end of the measuring unit 300 so that the second measuring sample S2 supplied through the second supply passage 260 is selectively introduced into the measuring unit 300. Can be controlled. The second variable valve 261 may be a 3-way valve.

Hereinafter, a description will be made further including FIGS. 3 and 4.

As shown in FIGS. 1 to 4, the measurement unit 300 may be connected to the first supply passage 160 and the second supply passage 260, and the first measurement may be supplied through the first supply passage 160. The total phosphorus may be measured from the sample S1, and the total nitrogen may be measured from the second measurement sample S2 supplied through the second supply passage 260.

The measuring unit 300 includes a first receiving cell 310, a second receiving cell 320, a light source 330, a reflector 340, a motor 350, a first calculating unit 360, and a second calculating unit ( 370).

The first receiving cell 310 may be connected to the first supply passage 160, and the first measurement sample S1 supplied through the first supply passage 160 may be accommodated.

The second receiving cell 320 may be connected to the second supply passage 260, and the second measurement sample S2 supplied through the second supply passage 260 may be accommodated.

The light source 330 may emit light L1 to irradiate the light.

The reflector 340 may be provided between the first accommodating cell 310 and the second accommodating cell 320, and may reflect light L1 emitted from the light source 330.

The motor 350 may rotate the reflector 340 so that the path of the light L1 irradiated from the light source 330 is changed to the first accommodation cell 310 or the second accommodation cell 320. can do.

The first output unit 360 may be provided at one side of the first receiving cell 310, and is based on the amount of light passing through the first measurement sample S1 accommodated in the first receiving cell 310. The concentration of can be calculated. When the first calculation unit 360 includes a photodiode, the first calculation unit 360 may calculate the concentration of total phosphorus based on a voltage value according to the amount of light passing through the first measurement sample S1. have.

The first drain passage 162 may be connected to the first receiving cell 310, and the measured first measurement sample S1 may be discharged through the first drain passage 162.

The second output unit 370 may be provided at one side of the second receiving cell 320 and is based on the amount of light passing through the second measurement sample S2 accommodated in the second receiving cell 320. The concentration of nitrogen can be calculated. When the second output unit 760 includes a photodiode, the second output unit 370 may calculate the concentration of total nitrogen based on the voltage value according to the light quantity of the light passing through the second measurement sample S2. Can be.

In addition, a second drain passage 262 may be connected to the second receiving cell 320, and the second measurement sample S2 after the measurement may be discharged through the second drain passage 262.

In addition, the measurement unit 300 may have a first band filter 380. The first band filter 380 may be provided between the reflector 340 and the first accommodating cell 310, and may pass only light having a wavelength of 880 nm in the light L1 reflected from the reflector 340. Therefore, the light L2 passing through the first band pass filter 380 and passing through the first measurement sample S1 may be light having a wavelength of 880 nm.

In addition, the measurement unit 300 may have a second band filter 390. The second band filter 390 may be disposed between the reflector 340 and the second receiving cell 320, and may pass only light having a wavelength of 220 nm among the light L1 reflected by the reflector 340. Therefore, the light L3 passing through the second band filter 390 and passing through the second measurement sample S2 may be light having a wavelength of 220 nm.

According to the present invention, the measurement unit 300 uses one light source 330 and changes the path of the light L1 irradiated from the light source 330 by using one reflector 340 to measure the total phosphorus. Or total nitrogen.

The light source 330 may generate light having a wavelength ranging from 120 nm to 2,000 nm, including a wavelength range of 220 nm and 880 nm. Therefore, while using a single light source 330, the first band filter 380 and the second band filter 390 can generate light having a wavelength of 880nm or 220nm suitable for measuring the total phosphorus or total nitrogen. Xenon lamp may be used as the light source 330.

According to the present invention, since the first processing unit 100 and the second processing unit 200 each have a syringe module and a branch channel independently, even if one of the syringe modules or the branch channel fails, the other side is inoperable. It is possible through this, it is possible to measure the water quality in the processing unit does not occur failure.

In addition, the phosphorus and total nitrogen measuring apparatus may include a washing unit 400.

The cleaning unit 400 may have a connection passage 410, a third inflow passage 420, a pump 430, and a discharge passage 440.

The connection passage 410 may have one end connected to the first variable valve 161 and the other end connected to the second variable valve 261. In addition, the third inflow passage 420 may be connected to the connection passage 410.

The pump 430 may be connected to the third inflow passage 420.

The second supply passage 260 and the connection passage 410 are blocked by the second variable valve 261, and the first supply passage 160 and the measurement unit 300 are blocked by the first variable valve 161. 1 when the receiving cell 310 is blocked, but the pump 430 generates a suction force while the first supply passage 160 and the connection passage 410 are connected, the first remaining in the first supply passage 160 The measurement sample may be sucked into the pump 430 through the connection passage 410 and the third inflow passage 420.

At this time, the first washing water 124 flows into the first branch channel 140 through the first inflow channel 130 and then is supplied through the first supply channel 160 to thereby supply the first supply channel 160. The interior can be cleaned.

In the same manner, the first supply passage 160 and the connection passage 410 are blocked by the first variable valve 161, and the second supply passage 260 and the measuring unit 2 are blocked by the second variable valve 261. When the second receiving cell 320 of the 300 is blocked, and the pump 430 generates a suction force while the second supply passage 260 and the connection passage 410 are connected, the second supply passage 260 is connected to the second supply passage 260. The remaining second measurement sample may be sucked into the pump 430 through the connection passage 410 and the third inflow passage 420. Then, the second washing water 224 flows into the second branch channel 240 through the second inflow passage 230 and then is supplied through the second supply passage 260 so that The interior can be cleaned.

The discharge passage 440 may be connected to the pump 430, and the first measurement sample or the second measurement sample, or the first washing water and the second washing water sucked into the pump 430 may be discharged through the discharge passage 440. It can be discharged to the outside.

The cleaning unit 400 cleans the interior of the first supply passage 160 and the second supply passage 260 so that accurate measurement of total nitrogen, which is total through the first measurement sample and the second measurement sample, is then performed. Can help.

In addition, the total phosphorus and total nitrogen measuring apparatus may include a first determination unit 500.

When the first determination unit 500 supplies only the first distilled water 125 of the plurality of first reagents 120 while the first processing unit 100 stops the supply of the first sample sample at the first time point. The first processing unit 100 stops supplying the first sample sample 110 at a second time different from the first time and the first measurement light quantity measured by the measuring unit 300, and again only the first distilled water 125 is returned. When supplied, the second measurement light quantity measured by the measuring unit 300 may be compared. Here, the second time point may be a time point after the first time point. In addition, when the first and second measurement light amounts are outside the first allowable error range, the first determination unit 500 may determine that the light source 330 of the measurement unit 300 needs to be replaced. That is, since the measured light quantity under the same conditions at different time points is outside the tolerance range, the performance of the light source may be deteriorated or it may be regarded as a failure. Therefore, the first determination unit 500 needs to replace the light source 330. Can be determined and displayed.

Meanwhile, when the first calculator 360 includes a photodiode, the first measured voltage value may be calculated based on the first measured light quantity, and the second measured voltage value may be calculated based on the second measured light quantity. .

The first determination unit 500 measures the first measured voltage value, and when the range of the output voltage value according to the concentration range of the total phosphorus is determined in this state, the output voltage value calculated at a later measurement is determined as the output voltage. If it is out of the range of values, it may be determined that the replacement of the light source is necessary. For example, when the first measured voltage value is 4,800 mV and the total phosphorus is in the range of 0.1 to 1 mg / L, the output voltage value has a range of 4,114 to 1,099 mV. If more than or less than 1,099mV, it may be determined that the replacement of the light source 330 is necessary.

In addition, the first determination unit 500 stops the supply of the second sample sample 210 by the second processing unit 200 at the third time point, and supplies only the second distilled water 225 of the plurality of second reagents 220. When the third measurement light quantity measured by the measuring unit 300 and the fourth time point different from the third time point, the second processing unit 200 stops supplying the second sample sample 210 to the second distilled water 225. Only when it is supplied again, the fourth measurement light quantity measured by the measuring unit 300 may be compared. Here, the fourth time point may be a time point after the third time point. In addition, when the third measured light amount and the fourth measured light amount are outside the second allowable error range, the first determination unit 500 may determine that the light source 330 of the measurement unit 300 needs to be replaced.

In addition, when the second calculator 370 includes a photodiode, a third measured voltage value may be calculated based on the third measured light amount, and a fourth measured voltage value may be calculated based on the fourth measured light amount. .

When the third determination voltage value is measured and the range of the output voltage value according to the concentration range of the total nitrogen is determined in this state, the first determination unit 500 outputs the output voltage value calculated at the time of subsequent measurement. If it is out of the range of the voltage value, it may be determined that the replacement of the light source is necessary. For example, when the third measured voltage value is 3,200 mV and the total nitrogen is in the range of 1 to 10 mg / L, the output voltage value is in the range of 3,091 to 2,265 mV. If it exceeds mV or less than 2,265mV, it may be determined that the light source 330 needs to be replaced.

In addition, the total phosphorus and total nitrogen measuring apparatus may include a second determination unit 600.

The second determination unit 600 compares the number of first command pulses summed during the first period with the number of actual measured first measurement pulses summed during the first period to control the driving of the first plunger 151. When the sum of the first command pulses and the sum of the first measurement pulses exceeds the third allowable error range, it may be determined that the first plunger 151 needs to be replaced.

In addition, the second determination unit compares the number of second command pulses summed during the second period with the number of actual measured second measurement pulses summed during the second period in order to control the driving of the second plunger 251, and sums them up. It may be determined that the replacement of the second plunger 251 is necessary if the number of the second command pulses and the sum of the second measurement pulses that are added are outside the fourth allowable error range.

Through this, the user can know when the light source 330, the first plunger 151 and the second plunger 251 need to be replaced, and secure the operation rate of the total phosphorus and total nitrogen measuring device by replacing the parts requiring replacement. And accurate water quality monitoring may be possible.

The total phosphorus and total nitrogen measuring device may further include a display unit for displaying the determination result of the first determination unit 500 and the determination result of the second determination unit 600.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the invention is indicated by the following claims, and it should be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalents are included in the scope of the invention.

100: first processing unit
130: first inflow channel
140: first branch channel
150: first syringe module
160: first supply channel
200: second processing unit
230: second inflow channel
240: second branch channel
250: second syringe module
260: second supply channel
300: measuring unit
330: light source
340: reflector
350: motor
400: cleaning unit
500: First Court
600: Second Judgment
S1: first measurement sample
S2: second measurement sample

Claims (9)

A plurality of first inflow passages through which a first sample sample and a plurality of first reagents are respectively introduced, a first branch channel connected to the plurality of first inflow passages to selectively open and close the plurality of first inflow passages; A first syringe module connected to the first branch channel and at least one of the first sample sample and the plurality of first reagents quantitatively introduced through the first branch channel to be pre-processed to be generated as a first measurement sample; A first processor connected to the first branch channel and having a first supply passage for supplying the first measurement sample so that total phosphorus is measured;
A plurality of second inflow passages through which a second sample sample and a plurality of second reagents are respectively introduced, a second branch channel connected to the plurality of second inflow passages to selectively open and close the plurality of second inflow passages; A second syringe module connected to the second branch channel and at least one of the second sample sample and the plurality of second reagents quantitatively introduced through the second branch channel to be pre-processed to generate a second measurement sample; A second processor connected to the second branch channel and having a second supply passage for supplying the second measurement sample so that total nitrogen is measured; And
A total phosphorus is measured from the first measurement sample connected to the first supply channel and the second supply channel and supplied through the first supply channel, and from the second measurement sample supplied through the second supply channel. Total phosphorus and total nitrogen measuring device comprising a measuring unit for measuring the total nitrogen. The method of claim 1,
The measuring unit
A first receiving cell in which the first measurement sample supplied through the first supply passage is accommodated;
A second receiving cell in which the second measurement sample supplied through the second supply passage is accommodated;
A light source for generating light,
A reflector disposed between the first accommodation cell and the second accommodation cell and reflecting light emitted from the light source;
A motor for rotating the reflector to change the path of the light irradiated from the light source into the first accommodation cell or the second accommodation cell;
A first calculating unit calculating a concentration of total phosphorus based on the amount of light passing through the first measurement sample;
Total phosphorus and total nitrogen measuring device having a second calculation unit for calculating the concentration of total nitrogen based on the light amount of light passing through the second measurement sample. The method of claim 2,
The measuring unit has a total phosphorus and total nitrogen measuring device provided between the reflector and the first receiving cell, characterized in that having a first band filter for passing only the light of 880nm wavelength of the light reflected from the reflector. The method of claim 2,
The measuring unit is provided between the reflector and the second receiving cell, total phosphorus and total nitrogen measuring apparatus, characterized in that having a second band filter for passing only the light of 220nm wavelength in the light reflected from the reflector. The method of claim 1,
One end is connected to the first variable valve connected to the first supply passage, and the other end is connected to the second variable valve connected to the second supply passage;
A third inflow channel connected to the connection channel,
The second measurement connected to the third inflow passage and remaining in the first measurement sample or the second supply passage remaining in the first supply passage by the operation of the first variable valve and the second variable valve; A pump for selectively sucking the sample,
And a cleaning unit connected to the pump and having a discharge passage for discharging the first measurement sample or the second measurement sample sucked into the pump. The method of claim 1,
A first measurement light quantity measured by the measuring unit when the first processing unit stops supplying the first sample sample and supplies only the first distilled water among the plurality of first reagents at a first point of time; At another second time point, when the first processor stops supplying the first sample sample and supplies only the first distilled water again, the first measurement light quantity and the first measurement light quantity are compared with each other. And a first determination unit which determines that the light source of the measurement unit needs to be replaced when the second measurement light amount is out of the first allowable error range. The method of claim 1,
A third measurement light quantity measured by the measuring unit when the second processing unit stops supplying the second sample sample and supplies only the second distilled water of the plurality of second reagents at a third time point; At another fourth time point, when the second processing unit stops supplying the second sample sample and supplies only the second distilled water again, the third measurement light quantity and the third measurement light quantity are compared with each other. And a first determination unit which determines that the light source of the measurement unit needs to be replaced when the fourth measurement light amount is out of the second allowable error range. The method of claim 1,
A first syringe module included in the first syringe module to control driving of the first plunger to generate a suction force for quantitatively introducing one or more of the first sample sample and the plurality of first reagents into the first branch channel; The number of first command pulses summed for one period and the actual measured first measured pulse counts summed for the first period are compared, and the first number of command pulses summed and the first measured pulse counts summed are third; And a second determination unit which determines that the first plunger needs to be replaced when it is out of the tolerance range. The method of claim 1,
A second syringe module included in the second syringe module to control driving of the second plunger to generate a suction force for quantitatively introducing one or more of the second sample sample and the plurality of second reagents into the second branch channel; Comparing the number of second command pulses summed over two periods with the number of actual measured second measurement pulses summed over the second period, wherein the sum of the second command pulses summed and the sum of the second measured pulse numbers summed over a fourth period; And a second determination unit which determines that the second plunger needs to be replaced when it is out of the tolerance range.

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