CN101907558A - Total organic carbon online analyzer and method for analyzing total organic carbon - Google Patents
Total organic carbon online analyzer and method for analyzing total organic carbon Download PDFInfo
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- CN101907558A CN101907558A CN 201010136954 CN201010136954A CN101907558A CN 101907558 A CN101907558 A CN 101907558A CN 201010136954 CN201010136954 CN 201010136954 CN 201010136954 A CN201010136954 A CN 201010136954A CN 101907558 A CN101907558 A CN 101907558A
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Abstract
The invention discloses a total organic carbon online analyzer for water, which mainly comprises an injection pump, a multi-ported valve, an oxygen diffusion pipe, a combustion furnace, a platinum catalyst, a condenser and a carbon dioxide gas detector (NDIR). The invention also relates to a method for analyzing the total organic carbon in the water by using the total organic carbon online analyzer for water. The total organic carbon online analyzer and the method can detect 0-2,000ppm water samples, and have the advantages of simple working principle, stability, reliability, low reagent consumption, no secondary pollution, simple and easy use, and wide application prospect in the water quality environment monitoring industry.
Description
Technical field
The present invention relates to a kind of total organic carbon (TOC) in-line analyzer of water quality, the invention still further relates to the method that a kind of total organic carbon in-line analyzer that utilizes this water quality is analyzed total organic carbon in the water quality.
Background technology
Total organic carbon (TOC:Total Organic Carbon) is the overall target that characterizes organic substance total amount in the water body, and it has represented the summation of organic substance in the water body.TOC not only can react water body and receive the degree that the machine material pollutes, and as a kind of source of students key element, can also react the situation of vital movement in the water body, and TOC has important effect for the whole world circulation of research carbon.At present, TOC measures and has been widely applied to aspects such as rivers, lake and marine monitoring, progressively becomes the conventional parameter of water quality monitoring.
The mensuration of TOC is made up of three steps usually in the water body: 1, the pre-service of water sample comprises sampling, filtration, acidifying and removes inorganic carbon; 2, the oxidation of TOC in the water sample, product are the CO that is easy to detect
2, this is the core of method; 3, the detection of oxidation product, the CO that the TOC oxidation produces
2Detection method is more, and NDIR (Non-Dispersive Infrared) absorption process (NDIR:non-dispersive infrared), conductance method, hydrogen flameionization method etc. are arranged, and wherein the NDIR (Non-Dispersive Infrared) absorption process is used the most general.
According to oxidation principle difference, usually the TOC assay method is divided three classes:
The potassium persulfate oxidizing process: this is the comparison classic methods, is called the wet-chemical oxidizing process again, and principle is: remove the inorganic carbon in the water sample, make oxygenant with potassium persulfate, heating (temperature is about 10CTC) in the sealed glass ampoule bottle with the TOC oxidation, is analyzed the CO that is produced
2Calculate the TOC concentration of water sample.This method equipment is simple, implements easily, but complex operation, precision is not very high, is difficult for realizing automatic METHOD FOR CONTINUOUS DETERMINATION.
Ultraviolet-potassium persulfate oxidizing process: in the presence of the oxygenant potassium persulfate,, make organism wherein decompose the generation inorganic carbon, according to the CO that is produced with high intensity ultraviolet rayed water sample
2Perhaps CH
4Analyze organic carbon content, the great advantage of this method is to be easy to automatic analysis.
Burning firing method (claiming dry type again): remove the water sample of inorganic carbon, inject the quartzy flame tube that catalyzer is housed, at high temperature organism quantitatively is oxidized to CO
2, CO
2Concentration is directly proportional with organic carbon in the water sample.Combustion oxidation-non-dispersion infrared absorption process only needs disposable conversion, simple, the favorable reproducibility of flow process.This method is complete to oxidation operation, but shortcoming is that the consumptive material of needs is too much when measuring water sample, and price is expensive.
The instrument that utilizes these principles to make has been arranged in the market, and mainly have following problem: 1, domestic equipment precision is low, detects limit for height, can only be used for the mensuration of fresh water system middle and high concentration TOC such as industrial sewage, can not satisfy the analysis of low concentration TOC in the water; 2, external import instrument costs an arm and a leg, and the key position oxidation tube needs often to change, and not only causes cost of determination too high, and has increased the maintenance difficulties of instrument, has influenced the continuity of data; 3, present commercially available instrument all less than the automatic on-line monitoring that well realizes TOC, especially can not be realized The real time measure, can not satisfy comprehensive, three-dimensional monitoring needs.And conductance method generally only is applicable to the water quality that saliferous is lower, and hydrogen flameionization cost height is not suitable for on-line monitoring.
Summary of the invention
From the problems referred to above, the object of the present invention is to provide a kind of total organic carbon (TOC) in-line analyzer of water quality and the method that a kind of total organic carbon in-line analyzer that utilizes this water quality is analyzed total organic carbon in the water quality, wherein, this analytical approach and analyser stable and reliable operation, simple to operate, maintenance cost is low, and is highly sensitive, and adaptability is good.
In order to achieve the above object, the present invention proposes the method that a kind of total organic carbon in-line analyzer that utilizes water quality is analyzed total organic carbon in the water quality, the total organic carbon in-line analyzer of described water quality comprises sample introduction portion, cycle detection portion and central control unit,
Wherein, described sample introduction portion comprises sample introduction pipe, multiport valve, demijohn, syringe pump, first flow meter and first solenoid valve, wherein, described multiport valve comprises first gateway, second gateway, the 3rd gateway, the 4th gateway, the 5th gateway, the 6th gateway and the 7th gateway at least;
Described cycle detection portion comprises carrier gas input pipe, pressure-regulating valve, tensimeter, second solenoid valve, second flowmeter, Aeration pipe, burner sample injection unit, burner, Filter dryer and gas analyzer, wherein, described burner comprises flame tube, has platinum catalyst in described flame tube;
Described central control unit communicates to connect with described sample introduction portion and described cycle detection portion respectively,
Described method comprise the following steps: successively to take a sample blend step, combustion step and carbon dioxide quantitative test step,
Wherein,
In described sampling blend step, carry out sampling and offer described syringe pump by described sample introduction portion; After sampling, switch described multiport valve, so that the acid solution in the described demijohn is offered described syringe pump; Carrying composition via described carrier gas input pipe, described tensimeter, described first solenoid valve and described first flow meter to described syringe pump successively then is the carrier gas of inert gas, so that obtained water sample fully mixes with described acid solution; Described syringe pump switches described multiport valve subsequently once more, so that can be sent to the described burner sample injection unit of described cycle detection portion with obtained water sample with described acid solution; Again described acid solution is sent into described burner with obtained water sample by described burner sample injection unit;
In described combustion step, described cycle detection portion utilizes Aeration pipe to mix oxygen to carrier gas, and utilize described burner sample injection unit that the carrier gas that is mixed with oxygen is provided to described burner, so that make the water sample burning that has mixed acid solution under the effect of oxygen in described platinum catalyst and carrier gas, and the gas after will burning is sent into, and Filter dryer filters and drying;
In described carbon dioxide quantitative test step, utilize described gas analyzer to carrying out quantitative test through the carbon dioxide in the gas of filtration drying, and the result after will analyzing offers described central control unit, result after to this analysis carries out further processing by described central control unit, and described central control unit is preserved and the output result.Can when carrying out burning repeatedly and detect, cycle detection portion utilize sample introduction portion to send into water sample at any time by method of the present invention, thus the total organic carbon in can online detection water quality.Preferably, platinum catalyst is housed in flame tube, thereby can improves the oxidation operation burning efficiency and can reduce the temperature of when burning heating furnace.
According to a second aspect of the invention, described sampling blend step also comprises the steps:
-switch multiport valve, so that first gateway of described multiport valve and second gateway communicate with each other, thereby can enter described syringe pump via described second gateway and described first gateway via the water sample that described sample introduction pipe enters;
-finishing the back at sample introduction switches described multiport valve, so that described first gateway and the 3rd gateway communicate with each other, thereby can make the acid solution in the described demijohn enter the described syringe pump that has water sample via described the 3rd gateway and described first gateway;
-after the input acid solution, open described first solenoid valve, so that enter described syringe pump, thereby make acid solution fully mix with water sample via the carrier gas of described carrier gas input pipe input;
-after mixing, switch described multiport valve, so that described first gateway and described the 7th gateway communicate with each other;
-described syringe pump is sent to described burner sample injection unit with scheduled volume with the mixed water sample of acid solution.
According to a third aspect of the invention we, wherein, described method also comprises demarcating steps, and wherein, described demarcating steps comprises the steps:
Switch described multiport valve, so that the titer in the described standard jar enters described syringe pump via described the 3rd gateway and described first gateway;
Carry out described combustion step and described carbon dioxide quantitative test step;
By described central control unit the result of described carbon dioxide quantitative test step is further handled and stores this result as reference value.
According to a forth aspect of the invention, described method also comprises cleans and mark zero step, and wherein, described cleaning and mark zero step comprise the steps:
Switch described multiport valve, so that the distilled water in the pure water bottle enters described syringe pump via described the 5th gateway and described first gateway;
Carry out described combustion step and described carbon dioxide quantitative test step;
Carry out above-mentioned steps repeatedly repeatedly, after carrying out carbon dioxide quantitative test step, the carbon dioxide values in the gas after described central control unit is determined to burn is lower than in the predetermined threshold, finishes described cleaning and mark zero step.
According to a fifth aspect of the invention, the invention also discloses a kind of total organic carbon in-line analyzer that is suitable for carrying out the water quality of the method for total organic carbon in the described analysis water quality, it comprises sample introduction portion, cycle detection portion and central control unit, wherein, described sample introduction portion comprises sample introduction pipe, multiport valve, demijohn, syringe pump, first flow meter and first solenoid valve, wherein, described multiport valve comprises first gateway, second gateway, the 3rd gateway, the 4th gateway, the 5th gateway, the 6th gateway and the 7th gateway at least;
Described cycle detection portion comprises carrier gas input pipe, pressure-regulating valve, tensimeter, second solenoid valve, second flowmeter, Aeration pipe, burner sample injection unit, burner, Filter dryer and gas analyzer, wherein, described burner comprises flame tube, has platinum catalyst in described flame tube;
Described central control unit communicates to connect with described sample introduction portion and described cycle detection portion respectively, and described central control unit is responsible for: the sample introduction of controlling described sample introduction portion; Control the switching of described multiport valve; Control the injection and the emptying of described syringe pump; Control the burning of described burner; And the result to described gas analyzer further handles,
Wherein,
Described sample introduction portion is responsible for water sample is mixed with the acid solution that is provided by described demijohn, and will offer described cycle detection portion with the mixed water sample of acid solution;
Described cycle detection portion carries out repeatedly successively: burning, to the gas filtration drying after the burning and measure carbon dioxide content in the dried gas;
Described central control unit also is responsible for after the result to described gas analyzer further handles, and preserves and the output result; And
Described central control unit can calculate total content of organic carbon according to described result, in conjunction with the metering result of syringe pump.
According to a sixth aspect of the invention, described sample introduction portion also comprises mark liquid bottle and pure water bottle, by the described multiport valve of suitable switching and utilize described pure water bottle can clean the total organic carbon analyzer of described water quality, and by the described multiport valve of suitable switching and utilize described mark liquid bottle can demarcate the total organic carbon analyzer of described water quality.
According to a seventh aspect of the invention, described syringe pump is connected with described first gateway of described multiport valve;
The sample introduction pipe that is used to import water sample is connected with described second gateway of described multiport valve;
An end that is used to import the acid solution input pipe of acid solution is connected described demijohn, and the other end is connected on described the 3rd gateway of described multiport valve;
An end that is used to import the titer input pipe of titer is connected described mark liquid bottle, and the other end is connected on described the 4th gateway of described multiport valve;
An end that is used to import the pure water input pipe of pure water is connected described pure water bottle, and the other end is connected on described the 5th gateway of described multiport valve;
An end that is used to export the discharging tube of unnecessary liquid is connected described the 6th gateway of described multiport valve, and the other end leads to waste liquid tank;
Liquid guiding tube is used for guiding the liquid of described syringe pump output into described burner sample injection unit, and an end of described liquid guiding tube is connected on described the 7th gateway of described multiport valve, and the other end is connected with described burner sample injection unit;
Described multiport valve comprises following several connected state at least: first connected state that described first gateway is communicated with described second gateway; Second connected state that described first gateway is communicated with described the 3rd gateway; The third connecting state that described first gateway is communicated with described the 4th gateway; The 4th connected state that described first gateway is communicated with described the 5th gateway; The 5th connected state that described first gateway is communicated with described the 6th gateway; The 6th connected state that described first gateway is communicated with described the 7th gateway;
Described carrier gas input pipe is connected with the carrier gas input port of described syringe pump via described pressure-regulating valve, described tensimeter, described first flow meter and described first solenoid valve, and described carrier gas input pipe also is connected on the described burner sample injection unit via described pressure-regulating valve, described tensimeter, described second solenoid valve, described second flowmeter and described Aeration pipe;
The delivery outlet of described burner is connected on the described gas analyzer via described Filter dryer.
According to an eighth aspect of the invention, described central control unit can be monitored the state of described Filter dryer, and can be when described Filter dryer is aging, and information gives a warning.
According to a ninth aspect of the invention, be provided with wash-bottle and halogen wash-bottle successively in described Filter dryer upstream.
According to the tenth aspect of the invention, described gas analyzer is a kind of in the following analyser: non-dispersion infrared gas analyzer, pump suction type infrared gas analyzer and laser gas analyzer.
Be according to the total organic carbon in-line analyzer of water quality of the present invention and the advantage of utilizing the total organic carbon in-line analyzer of this water quality to analyze the method for total organic carbon in the water quality: principle of work is simple, reliable and stable, reagent consumes little, there is not secondary pollution, be simple and easy to usefulness, have wide practical use in water quality environment monitoring industry.
Description of drawings
Below in conjunction with a unique accompanying drawing and according to embodiment the present invention is described.
Fig. 1 is the synoptic diagram of the explanation principle of the invention.
The Reference numeral complete list
1, syringe pump; 2, multiport valve; 3, burner; 4, device for drying and filtering; 5, non-dispersion infrared carbon dioxide analyzer (NDIR); 6, central control unit; 7, first solenoid valve; 8, first flow meter; 9, second flowmeter; 10, Aeration pipe; 11, second solenoid valve; 12, tensimeter; 13, pressure-regulating valve; 14, carrier gas input pipe; 15, carbon dioxide absorption bottle; 16, wash-bottle; 17, connecting pipe; 18, discharge opeing bottle; 19, discharging tube; 20, halogen wash-bottle; 21, halogen sluicing pipe; 22, burner sample injection unit; 23, sample introduction pipe; 24, mark liquid bottle; 25, demijohn; 26, titer input pipe; 27, acid solution input pipe; 28, pure water input pipe; 29, pure water bottle; 30, the communications cable; 31, discharging tube; 32, liquid guiding tube; 33, platinum catalyst; 34, flame tube; 35, discharging tube
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described.
Here provide a kind of total organic carbon in-line analyzer that preferably utilizes water quality and analyzed the method for total organic carbon in the water quality, the total organic carbon in-line analyzer of this water quality comprises sample introduction portion, cycle detection portion and central control unit 6, wherein, described sample introduction portion comprises sample introduction pipe 23, multiport valve 2, demijohn 25, syringe pump 1, first flow meter 8 and first solenoid valve 7, wherein, multiport valve 2 comprises first gateway, second gateway 202, the 3rd gateway 203, the 4th gateway 204, the 5th gateway 205, the 6th gateway 206 and the 7th gateway 207 at least; Cycle detection portion comprises carrier gas input pipe 14, pressure-regulating valve 13, tensimeter 12, second solenoid valve 11, second flowmeter 9, Aeration pipe 10, burner sample injection unit 22, burner 3, Filter dryer 4 and gas analyzer 5, wherein, burner 3 comprises flame tube 34, has platinum catalyst 33 in flame tube; Central control unit 6 communicates to connect with sample introduction portion and cycle detection portion respectively, method comprise the following steps: successively to take a sample blend step, combustion step and carbon dioxide quantitative test step,
Wherein,
In the sampling blend step, carry out sampling and offer syringe pump 1 by sample introduction portion; After sampling, switch multiport valve 2, so that the acid solution in the demijohn 25 is offered syringe pump 1; Carrying composition via carrier gas input pipe 14, tensimeter 12, first solenoid valve 7 and first flow meter 8 to syringe pump 1 successively then is the carrier gas of inert gas, so that obtained water sample fully mixes with acid solution; Syringe pump 1 switches multiport valve 2 subsequently once more, so that can be sent to the burner sample injection unit 22 of cycle detection portion with obtained water sample with acid solution; Again acid solution is sent into burner 3 with obtained water sample by burner sample injection unit 22;
In combustion step, cycle detection portion utilizes Aeration pipe to mix oxygen to carrier gas, and utilize burner sample injection unit 22 that the carrier gas that is mixed with oxygen is provided to burner 3, so that make the water sample burning that has mixed acid solution under the effect of oxygen in platinum catalyst and carrier gas, and the gas after will burning is sent into, and Filter dryer 4 filters and drying;
In carbon dioxide quantitative test step, utilize the carbon dioxide in 5 pairs of processes of gas analyzer gas of filtration drying to carry out quantitative test, and the result after will analyzing offers central control unit 6, carry out further processing by the result after 6 pairs of these analyses of central control unit, and central control unit 6 is preserved and the output result.
According to a preferred implementation, this sampling blend step also comprises the steps:
-switch multiport valve 2, so that first gateway of multiport valve 2 and second gateway 202 communicate with each other, thereby can enter syringe pump 1 via second gateway 202 and first gateway via the water sample that sample introduction pipe 23 enters;
-finishing the back at sample introduction switches multiport valve, so that first gateway and the 3rd gateway 203 communicate with each other, thereby can make the acid solution in the demijohn 25 enter the syringe pump 1 that has water sample via the 3rd gateway 203 and first gateway;
-after the input acid solution, open first solenoid valve 7, so that enter syringe pump 1, thereby make acid solution fully mix with water sample via the carrier gas of carrier gas input pipe 14 inputs;
-after mixing, switch multiport valve 2, so that first gateway and the 7th gateway 207 communicate with each other;
-syringe pump 1 is sent to burner sample injection unit 22 with scheduled volume with the mixed water sample of acid solution.
According to a preferred implementation, method of the present invention also comprises demarcating steps, and wherein, demarcating steps comprises the steps:
Carry out combustion step and carbon dioxide quantitative test step;
Result by 6 pairs of carbon dioxide quantitative test of central control unit step further handles and stores this result as reference value.
According to a preferred implementation, method of the present invention also comprises cleans and mark zero step, wherein,
Cleaning and mark zero step comprises the steps:
Carry out combustion step and carbon dioxide quantitative test step;
Carry out above-mentioned steps repeatedly repeatedly, after carrying out carbon dioxide quantitative test step, the carbon dioxide values in the gas after central control unit 6 is determined to burn is lower than in the predetermined threshold, finishes to clean and mark zero step.
The present invention adopts a kind of total organic carbon in-line analyzer that is suitable for carrying out the water quality of the method for total organic carbon in the described analysis water quality, the total organic carbon in-line analyzer of this water quality comprises sample introduction portion, cycle detection portion and central control unit 6, wherein, sample introduction portion comprises sample introduction pipe 23, multiport valve 2, demijohn 25, syringe pump 1, first flow meter 8 and first solenoid valve 7, wherein, multiport valve 2 comprises first gateway, second gateway 202, the 3rd gateway 203, the 4th gateway 204, the 5th gateway 205, the 6th gateway 206 and the 7th gateway 207 at least;
Cycle detection portion comprises carrier gas input pipe 14, pressure-regulating valve 13, tensimeter 12, second solenoid valve 11, second flowmeter 9, Aeration pipe 10, burner sample injection unit 22, burner 3, Filter dryer 4 and gas analyzer 5, wherein, burner 3 comprises flame tube 34, has platinum catalyst 33 in flame tube;
Central control unit 6 communicates to connect with sample introduction portion and cycle detection portion respectively, and central control unit 6 is responsible for: the sample introduction of control sample introduction portion; The switching of control multiport valve 2; The injection and the emptying of control syringe pump 1; The burning of control burner 3; And the result to gas analyzer 5 further handles,
Wherein,
Sample introduction portion is responsible for water sample is mixed with the acid solution that is provided by demijohn 25, and will offer cycle detection portion with the mixed water sample of acid solution;
Cycle detection portion carries out repeatedly successively: burning, to the gas filtration drying after the burning and measure carbon dioxide content in the dried gas;
Central control unit 6 also is responsible for after the result to gas analyzer 5 further handles, and preserves and the output result; And
Central control unit 6 can calculate total content of organic carbon according to result, in conjunction with the metering result of syringe pump 1.
According to a preferred implementation, burner sample injection unit 22 also links to each other with discharging tube 35, so that discharge excess liquid and gas when needed.
According to a preferred implementation, central control unit 6 is connected to each other by the communications cable 30 and gas analyzer 5, and central control unit 6 communicates with one another with each parts of sample introduction portion and cycle detection portion by unshowned mode (as: radio communication, wire communication or optical communication) and is connected.
According to a preferred implementation, sample introduction portion also comprises mark liquid bottle 24 and pure water bottle 29, by suitable switching multiport valve 2 and utilize pure water bottle 29 can clean the total organic carbon analyzer of water quality, and by suitable switching multiport valve 2 and utilize mark liquid bottle 24 can demarcate the total organic carbon analyzer of water quality.
According to a preferred implementation, syringe pump 1 is connected with first gateway of multiport valve 2;
The sample introduction pipe 23 that is used to import water sample is connected with second gateway 202 of multiport valve 2;
An end that is used to import the acid solution input pipe 27 of acid solution is connected demijohn 25, and the other end is connected on the 3rd gateway 203 of multiport valve 2;
An end that is used to import the titer input pipe 26 of titer is connected mark liquid bottle 24, and the other end is connected on the 4th gateway 204 of multiport valve 2;
An end that is used to import the pure water input pipe 28 of pure water is connected pure water bottle 29, and the other end is connected on the 5th gateway 205 of multiport valve 2;
An end that is used to export the discharging tube 31 of unnecessary liquid is connected the 6th gateway 206 of multiport valve 2, and the other end leads to waste liquid tank;
Liquid guiding tube 32 is used for guiding the liquid of syringe pump 1 output into burner sample injection unit 22, and an end of liquid guiding tube 32 is connected on the 7th gateway 207 of multiport valve 2, and the other end is connected with burner sample injection unit 22;
Carrier gas input pipe 14 is connected with the carrier gas input port of syringe pump 1 via pressure-regulating valve 13, tensimeter 12, first flow meter 8 and first solenoid valve 7, and carrier gas input pipe 14 also is connected on the burner sample injection unit 22 via pressure-regulating valve 13, tensimeter 12, second solenoid valve 11, second flowmeter 9 and Aeration pipe 10;
The delivery outlet of burner 3 is connected on the gas analyzer 5 via Filter dryer 4.
According to a preferred implementation, between exsiccator 4 and gas analyzer 5, be connected with halogen sluicing pipe 21.
According to a preferred implementation, the state that central control unit 6 can monitoring filtering exsiccator 4, and can be when Filter dryer 4 is aging, information gives a warning.
According to a preferred implementation, be provided with wash-bottle 16 and halogen wash-bottle 20 successively in Filter dryer 4 upstreams, wash-bottle 16 and halogen wash-bottle 20 utilize connecting pipe 17 to be connected to each other.
According to a preferred implementation, be connected with discharge opeing bottle 18 in Filter dryer 4 downstreams, this discharge opeing bottle 18 is connected with discharging tube 19.
According to a preferred implementation, gas analyzer 5 is a kind of in the following analyser: non-dispersion infrared gas analyzer, pump suction type infrared gas analyzer and laser gas analyzer.
Specific embodiment described herein only is that the present invention's spirit is illustrated.The technician of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described embodiment, and can be individually or adopt above-mentioned each feature in combination, do not depart from spirit of the present invention, do not exceed the appended claims restricted portion yet.
Claims (10)
1. a total organic carbon in-line analyzer that utilizes water quality is analyzed the method for total organic carbon in the water quality, and the total organic carbon in-line analyzer of described water quality comprises sample introduction portion, cycle detection portion and central control unit (6), wherein:
Described sample introduction portion comprises sample introduction pipe (23), multiport valve (2), demijohn (25), syringe pump (1), first flow meter (8) and first solenoid valve (7), wherein, described multiport valve (2) comprises first gateway, second gateway (202), the 3rd gateway (203), the 4th gateway (204), the 5th gateway (205), the 6th gateway (206) and the 7th gateway (207) at least;
Described cycle detection portion comprises carrier gas input pipe (14), pressure-regulating valve (13), tensimeter (12), second solenoid valve (11), second flowmeter (9), Aeration pipe (10), burner sample injection unit (22), burner (3), Filter dryer (4) and gas analyzer (5), wherein, described burner (3) comprises flame tube (34), has platinum catalyst (33) in described flame tube;
Described central control unit (6) communicates to connect with described sample introduction portion and described cycle detection portion respectively;
Described method comprise the following steps: successively to take a sample blend step, combustion step and carbon dioxide quantitative test step wherein, in described sampling blend step, are carried out sampling and are offered described syringe pump (1) by described sample introduction portion; After sampling, switch described multiport valve (2), so that the acid solution in the described demijohn (25) is offered described syringe pump (1); Carrying composition via described carrier gas input pipe (14), described tensimeter (12), described first solenoid valve (7) and described first flow meter (8) to described syringe pump (1) successively then is the carrier gas of inert gas, makes obtained water sample fully mix with described acid solution; Switch described multiport valve (2) subsequently once more, described acid solution is sent to the described burner sample injection unit (22) of described cycle detection portion with obtained water sample by described syringe pump (1); Again described acid solution is sent into described burner (3) with obtained water sample by described burner sample injection unit (22);
In described combustion step, described cycle detection portion utilizes Aeration pipe (10) to mix oxygen to carrier gas, and utilize described burner sample injection unit (22) to provide the carrier gas that is mixed with oxygen to described burner (3), in described platinum catalyst and carrier gas, make the water sample burning that has mixed acid solution under the effect of oxygen, and the gas after will burning is sent into, and Filter dryer (4) filters and drying;
In described carbon dioxide quantitative test step, utilize described gas analyzer (5) to carrying out quantitative test through the carbon dioxide in the gas of filtration drying, and the result after will analyzing offers described central control unit (6), result after to this analysis carries out further processing by described central control unit (6), and described central control unit (6) is preserved and the output result.
2. method according to claim 1 is characterized in that, described sampling blend step also comprises the steps:
-switching multiport valve (2), first gateway and second gateway (202) of described multiport valve (2) are communicated with each other, thereby can enter described syringe pump (1) via described second gateway (202) and described first gateway via the water sample that described sample introduction pipe (23) enters;
-finishing the back at sample introduction switches described multiport valve (2), described first gateway and the 3rd gateway (203) are communicated with each other, thereby make the acid solution in the described demijohn (25) enter the described syringe pump (1) that has water sample via described the 3rd gateway (203) and described first gateway;
-after the input acid solution, open described first solenoid valve (7), make carrier gas enter described syringe pump (1), thereby make acid solution fully mix with water sample via described carrier gas input pipe (14) input;
-after mixing, switch described multiport valve (2), described first gateway and described the 7th gateway (207) are communicated with each other; With
-described syringe pump (1) is sent to described burner sample injection unit (22) with scheduled volume with the mixed water sample of acid solution.
3. method according to claim 1 and 2, wherein, described method also comprises demarcating steps, wherein, described demarcating steps comprises the steps:
Switch described multiport valve (2), so that the titer in the described standard jar enters described syringe pump (1) via described the 3rd gateway (203) and described first gateway;
Carry out described combustion step and described carbon dioxide quantitative test step;
By described central control unit (6) result of described carbon dioxide quantitative test step is further handled and stores this result as reference value.
4. method according to claim 1 and 2, wherein, described method also comprises cleans and mark zero step, wherein,
Described cleaning and mark zero step comprise the steps:
Switch described multiport valve (2), so that the distilled water in the pure water bottle (29) enters described syringe pump (1) via described the 5th gateway (205) and described first gateway;
Carry out described combustion step and described carbon dioxide quantitative test step;
Carry out above-mentioned steps repeatedly repeatedly, after carrying out carbon dioxide quantitative test step, the carbon dioxide values in the gas after described central control unit (6) is determined to burn is lower than in the predetermined threshold, finishes described cleaning and mark zero step.
5. one kind is used for the total organic carbon in-line analyzer that enforcement of rights requires the water quality of one of 1 to 4 described method, and it comprises sample introduction portion, cycle detection portion and central control unit (6), wherein,
Described sample introduction portion comprises sample introduction pipe (23), multiport valve (2), demijohn (25), syringe pump (1), first flow meter (8) and first solenoid valve (7), wherein, described multiport valve (2) comprises first gateway, second gateway (202), the 3rd gateway (203), the 4th gateway (204), the 5th gateway (205), the 6th gateway (206) and the 7th gateway (207) at least;
Described cycle detection portion comprises carrier gas input pipe (14), pressure-regulating valve (13), tensimeter (12), second solenoid valve (11), second flowmeter (9), Aeration pipe (10), burner sample injection unit (22), burner (3), Filter dryer (4) and gas analyzer (5), wherein, described burner (3) comprises flame tube (34), has platinum catalyst (33) in described flame tube;
Described central control unit (6) communicates to connect with described sample introduction portion and described cycle detection portion respectively, and is responsible for by described central control unit (6): the sample introduction of controlling described sample introduction portion; Control the switching of described multiport valve (2); Control the injection and the emptying of described syringe pump (1); Control the burning of described burner (3); And the result to described gas analyzer (5) further handles,
It is characterized in that,
Described sample introduction portion is responsible for water sample is mixed with the acid solution that is provided by described demijohn (25), and will offer described cycle detection portion with the mixed water sample of acid solution;
Described cycle detection portion carries out repeatedly successively: burning, to the gas filtration drying after the burning and measure carbon dioxide content in the dried gas;
Described central control unit (6) also is responsible for after the result to described gas analyzer (5) further handles, and preserves also output result, and according to the metering result of described result and syringe pump (1), calculates total content of organic carbon.
6. the total organic carbon analyzer of water quality according to claim 5, it is characterized in that, described sample introduction portion also comprises mark liquid bottle (24) and pure water bottle (29), by switching described multiport valve (2) and utilize described pure water bottle (29) to clean the total organic carbon analyzer of described water quality, and by switching described multiport valve (2) and utilizing described mark liquid bottle (24) to demarcate the total organic carbon analyzer of described water quality.
7. according to the total organic carbon analyzer of claim 5 or 6 described water quality, it is characterized in that,
Described syringe pump (1) is connected with described first gateway of described multiport valve (2);
The sample introduction pipe (23) that is used to import water sample is connected with described second gateway (202) of described multiport valve (2);
An end that is used to import the acid solution input pipe (27) of acid solution is connected described demijohn (25), and the other end is connected on described the 3rd gateway (203) of described multiport valve (2);
An end that is used to import the titer input pipe (26) of titer is connected described mark liquid bottle (24), and the other end is connected on described the 4th gateway (204) of described multiport valve (2);
An end that is used to import the pure water input pipe (28) of pure water is connected described pure water bottle (29), and the other end is connected on described the 5th gateway (205) of described multiport valve (2);
An end that is used to export the discharging tube (31) of unnecessary liquid is connected described the 6th gateway (206) of described multiport valve (2), and the other end leads to waste liquid tank;
Liquid guiding tube (32) is used for guiding the liquid of described syringe pump (1) output into described burner sample injection unit (22), one end of described liquid guiding tube (32) is connected on described the 7th gateway (207) of described multiport valve (2), and the other end is connected with described burner sample injection unit (22);
Described multiport valve (2) comprises following several connected state at least: first connected state that described first gateway is communicated with described second gateway (202); Second connected state that described first gateway is communicated with described the 3rd gateway (203); The third connecting state that described first gateway is communicated with described the 4th gateway (204); The 4th connected state that described first gateway is communicated with described the 5th gateway (205); The 5th connected state that described first gateway is communicated with described the 6th gateway (206); The 6th connected state that described first gateway is communicated with described the 7th gateway (207);
Described carrier gas input pipe (14) is connected via described pressure-regulating valve (13), described tensimeter (12), described first flow meter (8) and the carrier gas input port of described first solenoid valve (7) with described syringe pump (1), and described carrier gas input pipe (14) also is connected on the described burner sample injection unit (22) via described pressure-regulating valve (13), described tensimeter (12), described second solenoid valve (11), described second flowmeter (9) and described Aeration pipe (10);
The delivery outlet of described burner (3) is connected on the described gas analyzer (5) via described Filter dryer (4).
8. according to the total organic carbon analyzer of claim 5 or 6 described water quality, it is characterized in that, monitor the state of described Filter dryer (4) by described central control unit (6), and when described Filter dryer (4) is aging, by described central control unit (6) information that gives a warning.
9. according to the total organic carbon analyzer of claim 5 or 6 described water quality, it is characterized in that, be provided with wash-bottle (16) and halogen wash-bottle (20) successively in described Filter dryer (4) upstream.
10. according to the total organic carbon analyzer of claim 5 or 6 described water quality, it is characterized in that described gas analyzer (5) is a kind of in the following analyser: non-dispersion infrared gas analyzer, pump suction type infrared gas analyzer and laser gas analyzer.
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| CN 201010136954 CN101907558A (en) | 2010-03-31 | 2010-03-31 | Total organic carbon online analyzer and method for analyzing total organic carbon |
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