CN105241812A - Water quality chemical oxygen demand (COD) detection device - Google Patents
Water quality chemical oxygen demand (COD) detection device Download PDFInfo
- Publication number
- CN105241812A CN105241812A CN201510639296.6A CN201510639296A CN105241812A CN 105241812 A CN105241812 A CN 105241812A CN 201510639296 A CN201510639296 A CN 201510639296A CN 105241812 A CN105241812 A CN 105241812A
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- China
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- reaction chamber
- heater strip
- temperature sensor
- heating wire
- oxygen demand
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Abstract
The invention discloses a water quality COD detection device. The device comprises a ventilation hood and a reaction chamber arranged in the ventilation hood; the inner wall of the ventilation hood is provided with a thermal insulation layer, the reaction chamber is used to store reagents and test a water sample, the periphery of the reaction chamber is provided with a semiconductor heating wire, the center of the internal bottom of the reaction chamber is provided with a temperature sensor, the semiconductor heating wire and the temperature sensor are both electrically connected to a controller; the semiconductor heating wire is winded around the periphery of the reaction chamber, a distance exists between the semiconductor heating wire and the external wall of the reaction chamber; and the periphery of the semiconductor heating wire is provided with a layer of shielding membrane, which is used to reflect thermo-electron sent by the semiconductor heating wire. The provided water quality COD detection device has the advantages of simple structure, reasonable design, user-friendliness, convenience, low carbon, and energy saving, can maintain a constant target temperature in the device, and thus can guarantee the stability and reliability of ammonia-nitrogen detection.
Description
Technical field
The invention belongs to ambient water quality online measuring technique field, be specifically related to a kind of water chemical oxygen demand pick-up unit.
Background technology
Along with the development of society, economic prosperity, modernization science and technology obtains applying more and more widely.In ambient water quality detection technique field, being also badly in need of using modernization science and technology means to save human and material resources, by computing machine and electronic technology integrated use, realizing detection technique modernization.
When carrying out ambient water quality chemical oxygen demand detection, national standard use potassium dichromate oxidation organism institute value is chemical oxygen demand (COD) in general sense, and available CODCr represents.This index is the important pollutant monitoring index in water quality standard, it reflects the degree that water body pollutes by reducing substances (especially organism), therefore existing oxidizing temperature and heat time become to measure chemical oxygen demand (COD) (CODcr) key point.Therefore, the direction becoming these those skilled in the art and make great efforts how is solved the problems of the technologies described above.
Summary of the invention
The object of the invention is to solve the problem, a kind of water chemical oxygen demand pick-up unit of temperature constant is provided.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of water chemical oxygen demand pick-up unit, comprise vent cabinet and the reaction chamber being located at vent cabinet inside, the inwall of vent cabinet is provided with thermofin, reaction chamber is used for placing response reagent and test water sample, the outer of described reaction chamber is arranged with semiconductor heater strip, and the center of inner bottom part is provided with temperature sensor, and semiconductor heater strip and temperature sensor are all electrically connected with controller;
Described semiconductor heater strip is wrapped in around reaction chamber, and between reacting outdoor wall between be separated with certain distance;
The outer of described semiconductor heater strip is arranged with a circle screened film, for the thermion that reflective semiconductor heater strip sends.
Preferably, the upper end of described vent cabinet is connected with vent fan.
Preferably, described reaction chamber is made up of quartz material.
Preferably, described temperature sensor is thermistor temperature sensor.
The invention has the beneficial effects as follows: water chemical oxygen demand pick-up unit provided by the present invention, controller is connected with temperature sensor with semiconductor heater strip, for constant reaction chamber temperature; Semiconductor heater strip and reaction chamber are non-contact thermal, can ensure that heating effect is more even; Screened film is used for the thermion that reflective semiconductor heater strip sends, and makes heating effect more immediate stability, and the thermofin of vent cabinet arranges and also prevent scattering and disappearing of heat, makes test environment more comfortable simultaneously.Structure of the present invention is simple, reasonable in design, uses flexibly, conveniently, low-carbon energy-saving, energy holding device internal temperature constant, in target setting temperature, ensures the reliability and stability that Water quality ammonia nitrogen detects.
Accompanying drawing explanation
Fig. 1 is the structural representation of water chemical oxygen demand pick-up unit of the present invention;
Fig. 2 is semiconductor heater strip of the present invention and reaction chamber position relationship schematic diagram.
Description of reference numerals: 1, vent cabinet; 2, reaction chamber; 3, semiconductor heater strip; 4, temperature sensor; 5, controller; 6, vent fan; 7, screened film.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described further:
As shown in Figure 1 to Figure 2, water chemical oxygen demand pick-up unit of the present invention, comprises the vent cabinet 1 of a rectangular parallelepiped, and the upper end of vent cabinet 1 is connected with vent fan 6, and the inwall of vent cabinet 1 is provided with thermofin, and thermofin can be heat-preservation cotton; Vent cabinet 1 inside is provided with reaction chamber 2, in the present embodiment, reaction chamber 2 is the hollow cylindrical structure be made up of quartz material, there is the characteristic of high temperature high voltage resistant, be applicable to the heating detected temperatures (165 DEG C) of chemical oxygen demand (COD), reaction chamber 2 upper end open, for placing response reagent and test water sample; The outer of reaction chamber 2 is arranged with semiconductor heater strip 3, and the center of inner bottom part is provided with temperature sensor 4, and semiconductor heater strip 3 is all connected with controller 5 by wire with temperature sensor 4.
Temperature sensor 4 is thermistor temperature sensor, and its precision is 1%, and length is 26mm, and diameter is 5mm, for the temperature data of detection reaction room 2 internal liquid; The power 150W of semiconductor heater strip 3, operating voltage 24V, maximum operating currenbt 5A, for heating reaction chamber 2; Controller 5 temperature resolution 0.1 DEG C, control accuracy 0.1 DEG C, target setting temperature range-50 ~ 1000 DEG C, return difference temperature range is 0.1 ~ 5 DEG C, and export and control contact capacity 10A/30V, the two-way automatic control of heating and cooling, is set as 165 DEG C by target temperature usually.
Traditional semiconductor heater strip 3 often directly and the wall contacts of reaction chamber 2, such advantage is that heating effect is fast, but reaction chamber 2 be heated and uneven, in the present embodiment, semiconductor heater strip 3 is wrapped in around reaction chamber 2, and and between reaction chamber 2 outer wall between be separated with certain distance, this distance is greater than 5mm, can according to the size adjustment of the winding density of semiconductor heater strip 3 and reaction chamber 2; The heat that semiconductor heater strip 3 sends is indirectly transferred to reaction chamber 2 by air, and heating effect is more even; The outer of semiconductor heater strip 3 is arranged with a circle screened film 7, and for the thermion that reflective semiconductor heater strip 3 sends, screened film 7 can not only increase the efficiency of heating surface of semiconductor heater strip 3, can also place scattering and disappearing of heat, make reaction chamber 2 temperature more constant.
Below the use procedure of above-mentioned detection device is described in further detail, to represent its principle of work and advantage:
In use, it is inner that chemical oxygen demand detection spectrophotometer, signal conditioning circuit, potassium dichromate reagent and detected water sample are all placed in reaction chamber 2, temperature sensor 4 gathers the temperature of reaction chamber 2 internal mix liquid, the temperature that controller 5 records according to temperature sensor 4, compare with target setting temperature, control the mode of operation of semiconductor heater strip 3, and then the temperature of reaction chamber 2 inside is in a constant state, thus ensures the reliability and stability that water chemical oxygen demand detects.It should be noted that, the controller 5 in the present embodiment is prior art.
Water chemical oxygen demand pick-up unit provided by the present invention, controller is connected with temperature sensor with semiconductor heater strip, for constant reaction chamber temperature; Semiconductor heater strip and reaction chamber are non-contact thermal, can ensure that heating effect is more even; Screened film is used for the thermion that reflective semiconductor heater strip sends, and makes heating effect more immediate stability, and the thermofin of vent cabinet arranges and also prevent scattering and disappearing of heat, makes test environment more comfortable simultaneously.Structure of the present invention is simple, reasonable in design, uses flexibly, conveniently, low-carbon energy-saving, energy holding device internal temperature constant, in target setting temperature, ensures the reliability and stability that Water quality ammonia nitrogen detects.
Those of ordinary skill in the art will appreciate that, embodiment described here is to help reader understanding's principle of the present invention, should be understood to that protection scope of the present invention is not limited to so special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combination of not departing from essence of the present invention according to these technology enlightenment disclosed by the invention, and these distortion and combination are still in protection scope of the present invention.
Claims (4)
1. a water chemical oxygen demand pick-up unit, it is characterized in that: comprise vent cabinet (1) and be located at the inner reaction chamber (2) of vent cabinet (1), the inwall of vent cabinet (1) is provided with thermofin, reaction chamber (2) is for placing response reagent and test water sample, the outer of described reaction chamber (2) is arranged with semiconductor heater strip (3), the center of inner bottom part is provided with temperature sensor (4), and semiconductor heater strip (3) and temperature sensor (4) are all electrically connected with controller (5);
Described semiconductor heater strip (3) is wrapped in reaction chamber (2) around, and between reaction chamber (2) outer wall between be separated with certain distance;
The outer of described semiconductor heater strip (3) is arranged with a circle screened film (7), for the thermion that reflective semiconductor heater strip (3) sends.
2. water chemical oxygen demand pick-up unit according to claim 1, is characterized in that: the upper end of described vent cabinet (1) is connected with vent fan (6).
3. water chemical oxygen demand pick-up unit according to claim 1, is characterized in that: described reaction chamber (2) is made up of quartz material.
4. water chemical oxygen demand pick-up unit according to claim 1, is characterized in that: described temperature sensor (4) is thermistor temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510639296.6A CN105241812A (en) | 2015-09-30 | 2015-09-30 | Water quality chemical oxygen demand (COD) detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510639296.6A CN105241812A (en) | 2015-09-30 | 2015-09-30 | Water quality chemical oxygen demand (COD) detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105241812A true CN105241812A (en) | 2016-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510639296.6A Pending CN105241812A (en) | 2015-09-30 | 2015-09-30 | Water quality chemical oxygen demand (COD) detection device |
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| CN (1) | CN105241812A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201569630U (en) * | 2009-12-11 | 2010-09-01 | 熊猫电子集团有限公司 | COD measuring color comparison device |
| CN101900681A (en) * | 2010-07-23 | 2010-12-01 | 哈尔滨工业大学 | Water body chemical oxygen demand rapid measurement device |
| CN102519780A (en) * | 2011-10-29 | 2012-06-27 | 重庆川仪分析仪器有限公司 | Digestor for chemical oxygen demand (COD) water quality automatic analyzer |
| JP2013142680A (en) * | 2012-01-12 | 2013-07-22 | Kmew Co Ltd | Evaluation method of pulp for cement hardened body |
| CN104849422A (en) * | 2015-03-11 | 2015-08-19 | 中国农业大学 | Ammonia nitrogen on-line monitoring system and method thereof |
| CN204989005U (en) * | 2015-09-30 | 2016-01-20 | 成都源溢科技有限公司 | Water quality chemical oxygen demand detection device |
-
2015
- 2015-09-30 CN CN201510639296.6A patent/CN105241812A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201569630U (en) * | 2009-12-11 | 2010-09-01 | 熊猫电子集团有限公司 | COD measuring color comparison device |
| CN101900681A (en) * | 2010-07-23 | 2010-12-01 | 哈尔滨工业大学 | Water body chemical oxygen demand rapid measurement device |
| CN102519780A (en) * | 2011-10-29 | 2012-06-27 | 重庆川仪分析仪器有限公司 | Digestor for chemical oxygen demand (COD) water quality automatic analyzer |
| JP2013142680A (en) * | 2012-01-12 | 2013-07-22 | Kmew Co Ltd | Evaluation method of pulp for cement hardened body |
| CN104849422A (en) * | 2015-03-11 | 2015-08-19 | 中国农业大学 | Ammonia nitrogen on-line monitoring system and method thereof |
| CN204989005U (en) * | 2015-09-30 | 2016-01-20 | 成都源溢科技有限公司 | Water quality chemical oxygen demand detection device |
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Application publication date: 20160113 |