CN114620883A - Automatic real-time control system for halogenated hydrocarbon in tap water - Google Patents
Automatic real-time control system for halogenated hydrocarbon in tap water Download PDFInfo
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- CN114620883A CN114620883A CN202210408101.7A CN202210408101A CN114620883A CN 114620883 A CN114620883 A CN 114620883A CN 202210408101 A CN202210408101 A CN 202210408101A CN 114620883 A CN114620883 A CN 114620883A
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- 150000008282 halocarbons Chemical class 0.000 title claims abstract description 47
- 239000008399 tap water Substances 0.000 title claims abstract description 37
- 235000020679 tap water Nutrition 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 78
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 31
- 230000005264 electron capture Effects 0.000 claims abstract description 29
- 238000005660 chlorination reaction Methods 0.000 claims abstract description 25
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000460 chlorine Substances 0.000 claims abstract description 22
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 22
- 235000020188 drinking water Nutrition 0.000 claims abstract description 15
- 239000003651 drinking water Substances 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 150000005826 halohydrocarbons Chemical class 0.000 claims abstract description 10
- 238000012546 transfer Methods 0.000 claims abstract description 9
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 17
- 239000002274 desiccant Substances 0.000 claims description 15
- 239000000945 filler Substances 0.000 claims description 13
- 238000005485 electric heating Methods 0.000 claims description 9
- 239000004743 Polypropylene Substances 0.000 claims description 8
- -1 polypropylene Polymers 0.000 claims description 8
- 229920001155 polypropylene Polymers 0.000 claims description 8
- 230000002572 peristaltic effect Effects 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 238000004659 sterilization and disinfection Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 208000003200 Adenoma Diseases 0.000 description 1
- 206010001233 Adenoma benign Diseases 0.000 description 1
- 208000032791 BCR-ABL1 positive chronic myelogenous leukemia Diseases 0.000 description 1
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 208000010833 Chronic myeloid leukaemia Diseases 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 208000033761 Myelogenous Chronic BCR-ABL Positive Leukemia Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 208000009956 adenocarcinoma Diseases 0.000 description 1
- FMWLUWPQPKEARP-UHFFFAOYSA-N bromodichloromethane Chemical compound ClC(Cl)Br FMWLUWPQPKEARP-UHFFFAOYSA-N 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 208000032839 leukemia Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention provides an automatic real-time control system for halogenated hydrocarbons in tap water, and relates to the technical field of drinking water detection equipment. The tap water halohydrocarbon automatic real-time control system comprises a heater, a stripping tower, a nitrogen supply source, a dehydrator, an electronic capture detector, a chlorinator and a controller for controlling the chlorinator; one end of the heater is connected with the chlorination tank of the water plant through a water inlet pipeline, and the other end of the heater is connected with the stripping tower so as to heat the drinking water from the chlorination tank of the water plant and transfer the heated drinking water into the stripping tower; the stripping tower is connected with the electron capture detector through a dehydrator so as to enable nitrogen flow containing halohydrocarbon generated in the stripping tower to be dehydrated and then transferred into the electron capture detector for detection; the electron capture detector is electrically connected with the controller, so that the controller adjusts the chlorine adding amount of the chlorine adding machine according to the detection result of the electron capture detector. The technical effect of adjusting the chlorine adding amount of the chlorine adding machine of the water plant in real time is achieved.
Description
Technical Field
The invention relates to the technical field of drinking water detection equipment, in particular to an automatic real-time control system for halogenated hydrocarbons in tap water.
Background
The chlorination disinfection is a disinfection mode commonly adopted by most waterworks at home and abroad due to the advantages of convenient operation, quick sterilization, continuous disinfection of residual chlorine and the like. However, in the chlorination process of drinking water, some natural organic matters in raw water react with chlorine to generate chlorination byproducts such as dichloromethane and chloroform, and further halogenated hydrocarbons in the drinking water are polluted. The halogenated hydrocarbon has obvious harm to human body, and the cancer society discovers that the halogenated hydrocarbon has carcinogenicity to animals through experiments as early as 1976, wherein the induction rate of monobromo dichloromethane to male rat adenoma or adenocarcinoma reaches 90%; foreign scholars study the relationship between the exposure of drinking water chlorination disinfection byproducts and the risk of adult leukemia, and the results show that the incidence of chronic granulocytic leukemia is remarkably increased when people contact tap water with halohydrocarbon of more than 40 mu g/L for a long time. Control of halogenated hydrocarbons in tap water is therefore of particular importance.
The amount of halogenated hydrocarbon produced in tap water is directly related to the amount of added chlorine, and the larger the amount of added chlorine, the more halogenated hydrocarbon is produced, so that adjusting the amount of added chlorine is the main way to control the content of halogenated hydrocarbon in tap water. The traditional halogenated hydrocarbon control mode is realized by firstly quantitatively detecting the trihalomethane content of tap water by a laboratory, informing a water plant after exceeding the standard and reducing the chlorine adding amount by the water plant. However, the frequency of monitoring halogenated hydrocarbons in water plants is low, usually several weeks to one month, which means that most of the time, halogenated hydrocarbons in tap water are in an uncontrolled state and it is difficult to judge whether there is an excessive risk. Moreover, the time for quantitatively detecting the content of the halogenated hydrocarbon in the tap water in a laboratory is long, usually several hours are needed, and after the trihalomethane is found to be out of standard, a water plant is informed to control chlorination, and a large amount of tap water which is out of standard is used by residents in the period.
Therefore, it is an important technical problem to be solved by those skilled in the art to provide an automatic real-time control system for halogenated hydrocarbons in tap water with high timeliness.
Disclosure of Invention
The invention aims to provide an automatic real-time control system for tap water halogenated hydrocarbon, which is used for relieving the technical problem of weak timeliness of drinking water detection in the prior art.
In a first aspect, an embodiment of the present invention provides an automatic real-time control system for halogenated hydrocarbons in tap water, including a heater, a stripping tower, a nitrogen gas supply source, a dehydrator, an electron capture detector, a chlorinator, and a controller for controlling the chlorinator;
one end of the heater is connected with a chlorination tank of a water plant through a water inlet pipeline, and the other end of the heater is connected with the stripping tower so as to heat drinking water from the chlorination tank of the water plant and transfer the drinking water into the stripping tower;
the nitrogen supply source is connected with a stripping cavity of the stripping tower, and the stripping tower is connected with the electron capture detector through the dehydrator so as to dehydrate the nitrogen flow containing the halogenated hydrocarbon generated in the stripping tower and transmit the nitrogen flow into the electron capture detector for detection;
the electron capture detector is electrically connected with the controller, so that the controller adjusts the chlorine adding amount of the chlorine adding machine according to the detection result of the electron capture detector.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein a peristaltic pump is disposed on the water inlet pipeline.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the heater includes a housing and an electric heating element, the electric heating element is disposed in the housing, a water inlet of the housing is connected to the water inlet pipeline, and a water outlet of the housing is connected to a water inlet of the stripping tower.
In combination with the first aspect, the present invention provides a possible implementation manner of the first aspect, wherein the heater heats the water sample to 60 ℃ to 80 ℃.
In combination with the first aspect, the present invention provides a possible implementation manner of the first aspect, wherein the heater heats the water sample to 65 ℃ to 75 ℃.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the nitrogen gas supply source employs a high-pressure nitrogen gas tank.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the stripping tower includes an outer shell and a filler for increasing a gas-liquid mass transfer area, and a cavity inside the outer shell forms the stripping cavity;
the water inlet of the stripping tower is connected with the water outlet of the heater, the air inlet of the stripping tower is connected with the nitrogen supply source, and the air outlet of the stripping tower is connected with the dehydrator;
the water inlet is located above the air inlet, filler is filled between the water inlet and the air inlet, and the air outlet is located above the water inlet.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the filler is raschig rings, polypropylene pall rings, and/or polypropylene polyhedral hollow spheres.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the dehydrator includes a box and a desiccant, the desiccant is disposed in the box, an air inlet of the box is connected to an air outlet of the stripping tower, and an air outlet of the box is connected to an air inlet of the electron capture detector.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the drying agent is a solid drying agent.
Has the advantages that:
the embodiment of the invention provides an automatic real-time control system for halogenated hydrocarbon in tap water, which comprises a heater, a stripping tower, a nitrogen supply source, a dehydrator, an electronic capture detector, a chlorinator and a controller for controlling the chlorinator; one end of the heater is connected with the chlorination tank of the tap water plant through a water inlet pipeline, and the other end of the heater is connected with the stripping tower so as to heat the drinking water from the chlorination tank of the tap water plant and transfer the heated drinking water into the stripping tower; the nitrogen supply source is connected with a stripping cavity of the stripping tower, and the stripping tower is connected with the electron capture detector through a dehydrator so as to dehydrate the nitrogen flow containing the halogenated hydrocarbon generated in the stripping tower and transmit the nitrogen flow into the electron capture detector for detection; the electron capture detector is electrically connected with the controller, so that the controller adjusts the chlorine adding amount of the chlorine adding machine according to the detection result of the electron capture detector.
Specifically, a water sample in a chlorination tank of a water plant is continuously transmitted into a heater by the water pressure of the chlorination tank, then the water sample is heated to a set temperature by the heater and then transmitted into a stripping tower, then high-pressure nitrogen is continuously introduced into a stripping cavity of the stripping tower through a nitrogen supply source to sweep the water sample, halogenated hydrocarbon is separated from the water sample to form a nitrogen flow containing halogenated hydrocarbon, the nitrogen provided by the nitrogen supply source generates positive pressure in the stripping cavity to isolate external air to form a low-oxygen environment so as to avoid a large amount of oxygen from entering an electronic capture detector along with the nitrogen flow to influence subsequent measurement, the nitrogen flow containing halogenated hydrocarbon enters a dehydrator to remove water and then enters the electronic capture detector, the halogenated hydrocarbon generates a signal value in the electronic capture detector, the strength of the signal value is positively correlated with the concentration of the halogenated hydrocarbon in water, and the controller can adjust the chlorination amount of the chlorination machine according to the size of the signal value of the halogenated hydrocarbon, thereby controlling the production amount of the halogenated hydrocarbon in the tap water in real time and ensuring that the concentration of the halogenated hydrocarbon is at a safe level.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic flow chart of an automatic real-time control system for halogenated hydrocarbons in tap water according to an embodiment of the present invention.
Icon:
100-a heater;
200-a stripping tower;
300-nitrogen gas supply;
400-a dehydrator;
500-an electron capture detector;
600-a chlorinator;
700-a controller;
800-chlorination tank of water works;
900-peristaltic pump.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention is described in further detail below by means of specific embodiments and with reference to the attached drawings.
Referring to fig. 1, an embodiment of the present invention provides an automatic real-time control system for halogenated hydrocarbons in tap water, including a heater 100, a stripping tower 200, a nitrogen gas supply source 300, a dehydrator 400, an electron capture detector 500, a chlorinator 600, and a controller 700 for controlling the chlorinator 600; one end of the heater 100 is connected with the chlorination tank 800 of the water plant through a water inlet pipeline, and the other end is connected with the stripping tower 200, so that drinking water from the chlorination tank 800 of the water plant is heated and then is transferred into the stripping tower 200; the nitrogen gas supply source 300 is connected with the stripping cavity of the stripping tower 200, and the stripping tower 200 is connected with the electron capture detector 500 through a dehydrator 400, so that the nitrogen gas flow containing the halogenated hydrocarbon generated in the stripping tower 200 is dehydrated and then is transmitted into the electron capture detector 500 for detection; the electron capture detector 500 is electrically connected to the controller 700 such that the controller 700 adjusts the chlorine addition amount of the chlorine adding machine 600 according to the detection result of the electron capture detector 500.
Specifically, a water sample in the chlorination tank 800 of the water plant is continuously transmitted into the heater 100 by the water pressure thereof, then the water sample is heated to a set temperature by the heater 100 and then transmitted into the stripping tower 200, then high-pressure nitrogen is continuously introduced into the stripping cavity of the stripping tower 200 through the nitrogen supply source 300 to purge the water sample, halohydrocarbon is separated from the water sample to form a nitrogen flow containing halohydrocarbon, the nitrogen provided by the nitrogen supply source 300 generates positive pressure in the stripping cavity to isolate external air to form a low-oxygen environment, so that a large amount of oxygen is prevented from entering the electronic capture detector 500 along with the nitrogen flow to influence the precision of subsequent measurement, the nitrogen flow containing halohydrocarbon enters the water remover 400 to remove moisture and then enters the electronic capture detector 500, the halohydrocarbon generates a signal value in the electronic capture detector 500, and the intensity of the signal value is positively correlated with the concentration of the halohydrocarbon in the water, the controller 700 can adjust the chlorine adding amount of the chlorine adding machine 600 according to the signal value of the halogenated hydrocarbon, thereby controlling the generation amount of the halogenated hydrocarbon in the tap water in real time and ensuring that the concentration of the halogenated hydrocarbon is at a safe level.
The automatic real-time control system for halogenated hydrocarbons in tap water provided by the embodiment can monitor the chlorine content in the chlorination tank 800 of the tap water plant in real time, so that the chlorine adding amount of the chlorination machine 600 of the water plant is controlled, the water quality of tap water is guaranteed, automatic real-time control on halogenated hydrocarbons in the tap water plant can be realized, and the timeliness is high.
Referring to fig. 1, in an alternative embodiment, a peristaltic pump 900 is disposed in the water inlet line.
Specifically, the water sample from the chlorination tank 800 of the waterworks can be continuously transferred to the heater 100 through the peristaltic pump 900.
In addition, a person skilled in the art can set a power component for continuously transmitting the water sample in the chlorination tank 800 of the waterworks to the heater 100 according to actual requirements, and details are not described herein.
Referring to fig. 1, in an alternative embodiment, the heater 100 includes a housing and an electric heating element, the electric heating element is disposed in the housing, a water inlet of the housing is connected to a water inlet pipeline, and a water outlet of the housing is connected to a water inlet of the stripping tower 200.
Specifically, the electric heating element can heat a water sample in the housing, and then the heated water flows into the stripping tower 200 from the water outlet of the housing.
In an alternative to this embodiment, the heater 100 heats the water sample to 60-80 ℃.
Specifically, the heater 100 may heat the water sample to 60-80 ℃. Wherein, a temperature sensor is provided in the case of the heater 100 so that the worker can detect the temperature of the water sample in the heater 100, thereby adjusting the power of the electric heating member.
In an alternative to this embodiment, the heater 100 heats the sample water to 65-75 ℃.
Specifically, the heater 100 may heat the water sample to 65-75 ℃. Wherein, a temperature sensor is provided in the case of the heater 100 so that the worker can detect the temperature of the water sample in the heater 100, thereby adjusting the power of the electric heating member.
In an alternative of this embodiment, the nitrogen gas supply source 300 employs a high pressure nitrogen gas tank.
Specifically, nitrogen gas supply source 300 can adopt high-pressure nitrogen gas jar, utilizes high-pressure nitrogen gas jar to blow in high-pressure nitrogen gas in to the air stripping tower 200, guarantees to blow and takes off and produces the malleation in the chamber to isolated outside air forms the low oxygen environment, avoids a large amount of oxygen to follow nitrogen gas stream entering electron capture detector 500 and influences the precision of follow-up measurement.
In an alternative of this embodiment, the stripping tower 200 includes a shell and a filler for increasing the gas-liquid mass transfer area, and a cavity inside the shell forms a stripping cavity; the water inlet of the stripping tower 200 is connected with the water outlet of the heater 100, the air inlet of the stripping tower 200 is connected with the nitrogen supply source 300, and the air outlet of the stripping tower 200 is connected with the dehydrator 400; the water inlet is located the top of air inlet, and is filled with the filler between water inlet and the air inlet, and the gas outlet is located the top of water inlet.
Specifically, after entering the stripping tower 200 from the water inlet of the stripping tower 200, the water sample falls on the filler, and then the mass transfer area between the water sample and nitrogen is increased through the guiding diffusion of the filler, so that more halohydrocarbon is separated out, and the measurement accuracy is improved.
In the alternative of this embodiment, the packing is Raschig rings, polypropylene Bohr rings and/or polypropylene polyhedral hollow spheres.
Specifically, the filler can be one or more of raschig ring, polypropylene pall ring and polypropylene polyhedral hollow sphere, and the type of the filler can be selected by a person skilled in the art according to the requirement, so long as the selected filler can improve the mass transfer area of the water sample and the nitrogen, and the details are not repeated herein.
In an alternative of this embodiment, the dehydrator 400 includes a box and a desiccant, the desiccant is disposed in the box, an air inlet of the box is connected to an air outlet of the stripping tower 200, and an air outlet of the box is connected to an air inlet of the electron capture detector 500.
Specifically, moisture in the nitrogen gas flow is removed by the dehydrator 400, thereby improving the detection result of the electron capture detector 500.
In an alternative to this embodiment, the desiccant is a solid desiccant.
Specifically, the desiccant may be a solid desiccant.
In addition, the type of the desiccant can be selected by those skilled in the art according to the needs, and will not be described herein.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An automatic real-time control system for halogenated hydrocarbons in tap water, which is characterized by comprising: the system comprises a heater (100), a stripping tower (200), a nitrogen gas supply source (300), a dehydrator (400), an electron capture detector (500), a chlorinator (600) and a controller (700) for controlling the chlorinator (600);
one end of the heater (100) is connected with the chlorination tank (800) of the water plant through a water inlet pipeline, and the other end of the heater is connected with the stripping tower (200) so as to heat the drinking water from the chlorination tank (800) of the water plant and transfer the heated drinking water into the stripping tower (200);
the nitrogen supply source (300) is connected with a stripping cavity of the stripping tower (200), the stripping tower (200) is connected with the electron capture detector (500) through the dehydrator (400), so that the nitrogen flow containing the halogenated hydrocarbon generated in the stripping tower (200) is dehydrated and then is transferred into the electron capture detector (500) for detection;
the electron capture detector (500) is electrically connected with the controller (700) so that the controller (700) adjusts the chlorine adding amount of the chlorine adding machine (600) according to the detection result of the electron capture detector (500).
2. The automatic real-time control system for halogenated hydrocarbons in tap water according to claim 1, characterized in that a peristaltic pump (900) is arranged on the water inlet pipeline.
3. The automatic real-time control system for halogenated hydrocarbons in tap water as claimed in claim 2, wherein the heater (100) comprises a housing and an electric heating element, the electric heating element is disposed in the housing, the water inlet of the housing is connected with the water inlet pipeline, and the water outlet of the housing is connected with the water inlet of the stripping tower (200).
4. The tap water halocarbon automatic real-time control system according to claim 3, wherein the heater (100) heats the water sample to 60-80 ℃.
5. The tap water halocarbon automatic real-time control system according to claim 4, wherein the heater (100) heats the water sample to 65-75 ℃.
6. The automatic real-time control system for halogenated hydrocarbons in tap water according to claim 5, characterized in that the nitrogen gas supply source (300) is a high-pressure nitrogen tank.
7. The tap water halohydrocarbon automatic real-time control system according to claim 6, wherein the stripping tower (200) comprises a shell and a filler for increasing gas-liquid mass transfer area, and a cavity inside the shell forms the stripping cavity;
a water inlet of the stripping tower (200) is connected with a water outlet of the heater (100), a gas inlet of the stripping tower (200) is connected with the nitrogen supply source (300), and a gas outlet of the stripping tower (200) is connected with the dehydrator (400);
the water inlet is located above the air inlet, filler is filled between the water inlet and the air inlet, and the air outlet is located above the water inlet.
8. The automatic real-time tap water halocarbon control system according to claim 7, wherein said filler is Raschig rings, polypropylene Bohr rings and/or polypropylene polyhedral hollow spheres.
9. The automatic real-time control system for halogenated hydrocarbons in tap water according to claim 8, characterized in that the dehydrator (400) comprises a box and a desiccant, the desiccant is disposed in the box, the air inlet of the box is connected to the air outlet of the stripping tower (200), and the air outlet of the box is connected to the air inlet of the electron capture detector (500).
10. The automatic real-time tap water halocarbon control system according to claim 9, wherein the drying agent is a solid drying agent.
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Application publication date: 20220614 |