CN110361348B - Total nitrogen detection system for water quality detection and total nitrogen detection method thereof - Google Patents
Total nitrogen detection system for water quality detection and total nitrogen detection method thereof Download PDFInfo
- Publication number
- CN110361348B CN110361348B CN201910775988.1A CN201910775988A CN110361348B CN 110361348 B CN110361348 B CN 110361348B CN 201910775988 A CN201910775988 A CN 201910775988A CN 110361348 B CN110361348 B CN 110361348B
- Authority
- CN
- China
- Prior art keywords
- heating
- cavity
- sliding block
- sample
- heating wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 238000001514 detection method Methods 0.000 title claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 127
- 239000000463 material Substances 0.000 claims abstract description 46
- 238000012360 testing method Methods 0.000 claims abstract description 24
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 13
- 238000009413 insulation Methods 0.000 claims description 22
- 230000017525 heat dissipation Effects 0.000 claims description 13
- 230000000630 rising effect Effects 0.000 claims description 13
- 238000002835 absorbance Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 6
- 238000007865 diluting Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 238000011088 calibration curve Methods 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000012372 quality testing Methods 0.000 claims 1
- WABPQHHGFIMREM-AHCXROLUSA-N lead-203 Chemical compound [203Pb] WABPQHHGFIMREM-AHCXROLUSA-N 0.000 description 3
- WABPQHHGFIMREM-OIOBTWANSA-N lead-204 Chemical compound [204Pb] WABPQHHGFIMREM-OIOBTWANSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
Abstract
The invention discloses a total nitrogen detection system for water quality detection, which comprises a disinfection unit; the disinfection unit comprises a heating assembly and a material containing assembly; the heating component comprises a heating cavity, a heating wire and a sliding block; the sliding block is arranged in the heating cavity; the sliding block reciprocates along the length direction of the heating cavity; the sliding block is arranged in the heating cavity in a matching way; the sliding block is moved, and the heating area of the material containing assembly corresponding to the upper part of the heating wire is correspondingly changed, so that the heating range of the heating wire can be flexibly controlled, and the heat utilization efficiency is improved; when the previous heating is not completed and a new sample needs to be added, the size of the heated area of the material containing assembly can be expanded only by stretching the heating wire and adjusting the loading power of the heating wire, so that the sample is temporarily added in the middle of the test, the temporary addition of the sample is realized, the use fault tolerance of the equipment is increased, and the working efficiency of the disinfection unit is obviously improved.
Description
Technical Field
The invention relates to the field of water quality detection, in particular to a total nitrogen detection system for water quality detection.
Background
In domestic sewage, farmland drainage and many industrial wastewaters, there are a large amount of organic nitrogen and inorganic nitrides, which cause mass propagation of organisms and microorganisms, consume dissolved oxygen in water, and deteriorate the quality of water. And when the lake and the reservoir contain over-standard nitrogen, phytoplankton can be caused to propagate vigorously, and the eutrophication state can be generated. Therefore, total nitrogen is one of the important indicators for measuring water quality. Currently, ultraviolet spectrophotometry is mostly adopted for measuring total nitrogen, and a pressure steam sterilizer is needed to sterilize samples in the detection process. For a plurality of batches of samples, the traditional pressure steam sterilizer cannot increase or decrease the samples in real time once being started, which seriously limits the improvement of the utilization rate of the equipment. Therefore, it is necessary to invent a total nitrogen detection system for water quality detection, which can dynamically take and place samples.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a total nitrogen detection system for water quality detection, which can dynamically take and place samples.
The technical scheme is as follows: in order to achieve the above object, the present invention provides a total nitrogen detection system for water quality detection, comprising a disinfection unit; the disinfection unit comprises a heating assembly and a material containing assembly; the heating component comprises a heating cavity, a heating wire and a sliding block; the sliding block is arranged in the heating cavity; the sliding block reciprocates along the length direction of the heating cavity; the sliding block divides the heating cavity into a first cavity and a second cavity; the heating wire is arranged in the first cavity; one end of the heating wire, which is far away from the sliding block, is fixedly connected with the wall surface of the first cavity; one end of the heating wire close to the second cavity is connected with the sliding block and stretches synchronously along with the movement of the sliding block; a sample is placed in the material containing assembly; the material containing assembly is correspondingly arranged above the heating assembly; a heat-conducting plate is arranged between the material containing component and the heating component; and moving the sliding block, and correspondingly changing the heating area of the material containing assembly above the heating wire.
Further, protective gas is filled in the heating cavity; the protective gas is any one of nitrogen and inert gas; an air groove is formed in the outer side of the sliding block; two ends of the air groove are respectively communicated with the first cavity and the second cavity; the heat conducting plate comprises a plurality of unit plates; the plurality of unit plates are spliced end to end along the length direction of the heat conducting plate; and a heat insulation belt is arranged between the adjacent unit plates.
Furthermore, a first lead is connected to one end, fixed in position, of the heating wire; the first lead is embedded in the wall surface of the temperature rising cavity; one end of the first lead, which is far away from the heating wire, extends to the outside of the temperature rising cavity and is electrically connected with a power supply; a heat insulation pipe is connected and arranged on one side of the sliding block, which faces away from the first chamber; one end of the heat insulation pipe, which is far away from the sliding block, penetrates through the wall surface of the second chamber and extends to the outside of the second chamber; a second lead is arranged in the heat insulation pipe; the second lead is embedded in the sliding block and is connected with the corresponding end of the heating wire; one end of the second lead, far away from the sliding block, extends out of the temperature-raising cavity and is electrically connected with the power supply.
Furthermore, auxiliary heat conducting pieces are embedded on two side wall surfaces of the temperature rising cavity in the length direction; the upper end of the auxiliary heat conducting piece penetrates through the partition plate and vertically extends into the material containing assembly; the structure surface of the auxiliary heat conducting piece in the material containing assembly is sleeved with a heat dissipation cover; a plurality of heat dissipation holes are formed in the heat dissipation cover.
Further, the material containing assembly comprises a material cavity; the material cavity and the heating cavity are both of annular structures; the material cavity is formed by annularly splicing a plurality of bin bodies; a first heat insulation plate is arranged between the adjacent bin bodies; an end cover is arranged at the top of the bin body; the end cover is in sealing fit with the bin body; and the end cover is provided with an air outlet valve.
Furthermore, a first mounting table and a second mounting table are respectively arranged on two opposite sides of the top of the bin body; one side of the end cover is hinged and matched with the first mounting table, and the other side of the end cover is buckled with the second mounting table; and a connecting line between the central point of the first mounting platform and the central point of the second mounting platform is parallel to a rotating track tangent line at the center of the corresponding bin body.
Further, the test bed is further included; the test bed is arranged at the top of the heating assembly; a second heat insulation plate is arranged between the test bed and the heating assembly; the test bed comprises a cabinet body and a table top; the table top is arranged at the top of the cabinet body; the upper end of the table top is provided with a storage groove; the top of the storage groove is provided with a cover plate in a sliding fit manner; an inclined plane is arranged on one side, close to the experimenter, in the storage groove; the included angle between the inclined plane and the horizontal plane is 45-60 degrees; a drying plate is arranged above the bottom surface of the storage groove at intervals; a grid plate is embedded on the drying plate; and an air duct is communicated and arranged below the drying plate.
The detection method of the total nitrogen detection system for water quality detection comprises the following steps,
step one, taking a proper amount of water sample into a 25ml colorimetric tube, diluting the water sample to 10ml of marked line by using non-ammonia water, adding 5ml of alkaline potassium persulfate solution, plugging a ground plug, and tightly wrapping a tube plug by using gauze and a yarn rope to obtain a sample;
secondly, placing the sample into a bin body, closing an end cover, and then adjusting a heating wire to a corresponding position below the bin body for heating;
step three, continuously taking a next water sample, and repeating the operation of the step one to obtain a new sample; then, a new sample is placed in the bin body adjacent to the heating area, and the newly started bin body is encapsulated into the heating area by stretching the length of the heating wire; so as to heat two samples which are put in at different time;
step four, when the first sample is heated, other bin bodies are in a heat preservation state; then opening a bin body air outlet valve corresponding to the first sample, and opening an end cover to take out the sample after releasing steam; if a new sample is added in the midway, repeating the process of the third step;
step five, cooling the sample to room temperature, adding 1ml of hydrochloric acid, and diluting the solution to 25ml of marked line by using non-ammonia water; on an ultraviolet spectrophotometer, taking ammonia-free water as a reference, and measuring absorbance at wavelengths of 220nm and 275nm respectively by using 10ml quartz cuvettes;
replacing the water sample with ammonia-free water, and performing whole-process blank measurement;
step seven, calculating; and subtracting the absorbance of the blank test from the absorbance measured by the water sample, and checking the total nitrogen content from the calibration curve.
Has the advantages that: the invention discloses a total nitrogen detection system for water quality detection, which comprises a disinfection unit; the disinfection unit comprises a heating assembly and a material containing assembly; the heating component comprises a heating cavity, a heating wire and a sliding block; the sliding block is arranged in the heating cavity; the sliding block reciprocates along the length direction of the heating cavity; the sliding block is arranged in the heating cavity in a matching way; the sliding block is moved, and the heating area of the material containing assembly corresponding to the upper part of the heating wire is correspondingly changed, so that the heating range of the heating wire can be flexibly controlled, and the heat utilization efficiency is improved; when the previous heating is not completed and a new sample needs to be added, the size of the heated area of the material containing assembly can be expanded only by stretching the heating wire and adjusting the loading power of the heating wire, so that the sample is temporarily added in the middle of the test, the temporary addition of the sample is realized, the use fault tolerance of the equipment is increased, and the working efficiency of the disinfection unit is obviously improved.
Drawings
FIG. 1 is a schematic view of the internal structure of a heating assembly;
FIG. 2 is a detail view of the heating assembly;
FIG. 3 is a schematic view of the installation position of the material containing assembly;
FIG. 4 is a schematic structural view of an auxiliary heat-conducting member;
FIG. 5 is a detail view of the structure of the material holding assembly;
FIG. 6 is a schematic view of the overall structure of the test bed;
fig. 7 is a detail view of the structure in the storage tank.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
A total nitrogen detection system for water quality detection comprises a disinfection unit 1; the disinfection unit 1 comprises a heating assembly 2 and a material containing assembly 3; as shown in fig. 1 and 2, the heating assembly 2 includes a warming chamber 21, a heating wire 22 and a sliding block 23; the sliding block 23 is arranged in the warming cavity 21; the sliding block 23 reciprocates along the length direction of the warming cavity 21; the sliding block 23 divides the warming cavity 21 into a first cavity 201 and a second cavity 202; the heating wire 22 is arranged in the first chamber 201; one end of the heating wire 22 far away from the sliding block 23 is fixedly connected with the wall surface of the first chamber 201; one end of the heating wire 22 close to the second chamber 202 is connected with the sliding block 23 and stretches synchronously along with the movement of the sliding block 23; as shown in fig. 5, a sample 4 is placed inside the material containing assembly 3; the material containing assembly 3 is correspondingly arranged above the heating assembly 2; a heat conducting plate 25 is arranged between the material containing component 3 and the heating component 2; moving the sliding block 23, and correspondingly changing the heating area of the material containing assembly 3 above the heating wire 22; the material containing assembly 3 is internally provided with a plurality of mutually independent spaces, and the heating range of the heating wire 22 can be controlled according to the space occupied by the sample 4, so that the heat utilization efficiency is improved, the space utilization rate of the stored sample is improved, when the previous heating is not completed and a new sample needs to be added, the temporary addition of the sample in the middle of the test can be realized only by stretching the heating wire 22 and adjusting the loading power thereof, and the working efficiency of the disinfection unit is obviously improved; after the heating is finished, the heating part of the common pressure steam sterilizer still has residual temperature, so that the cooling speed of the sample in the closed container is prolonged; but the telescopic heating wires can be contracted after heating is finished, so that the continuous heating of the plurality of upper bin bodies 301 is avoided; the movement of the sliding block 23 can be realized by installing a driving wheel and a matched motor at the bottom of the sliding block, and the bidirectional movement required for the stretching or stretching state of the traction heating wire can be realized by a wireless control panel, and the control panel structure, the driving wheel and the motor can be directly purchased and obtained, which is not described herein; for the problem of the running environment of the motor, because the heating target temperature of the pressure steam sterilizer in the current market is generally below 110 ℃ in the full nitrogen detection, the insulating material part of the motor which is most prone to high-temperature aging only needs to be selected from B-grade insulating materials, and thus the motor can adapt to hot gas entering the second chamber 202 from the first chamber 201 through the gas tank; as shown in fig. 1, the heating assembly 2 further includes a buffer chamber 207 and an insulating chamber 208; the buffer cavity 207 and the dynamically-changed second cavity 202 clamp the first cavity 201 which generates heat in the middle, so that the temperature is well prevented from being conducted to the whole heating assembly, the second heat insulation plate 259 above the heat insulation cavity 208 is matched, the test bed 6 can be arranged in the area outside the material containing assembly 3 at the top of the heating assembly 2, the compact structure degree of the detection system is obviously improved, and the space utilization rate of a detection place is improved.
As shown in fig. 5, the material containing assembly 3 comprises a material cavity 31; the material cavity 31 and the heating cavity 21 are both of annular structures and correspond to each other in the vertical direction; the material cavity 31 is formed by annularly splicing a plurality of bin bodies 301; a first heat insulation plate 302 is arranged between the adjacent bin bodies 301, so that the situation that the bin bodies which are being heated conduct heat to the bin bodies which are not heated at the partition walls is avoided, and the heat efficiency is improved; the number of the upper bin bodies corresponding to the heating wires 22 can be changed by adjusting the heating wires in a telescopic way, so that the purpose of adjusting the heating area is achieved; an end cover 32 is arranged at the top of the bin body 301; the end cover 32 is in sealing fit with the bin body 301, so that the interior of the bin body can reach the temperature and pressure required by a test after being heated; the end cap 32 is provided with an air outlet valve 321 for discharging the high-pressure steam inside after the heating is stopped.
A first mounting table 307 and a second mounting table 308 are respectively arranged on two opposite sides of the top of the bin body 301; one side of the end cover 32 is hinged and matched with the first mounting table 307, the other side of the end cover is buckled with the second mounting table 308, and the buckled specific locking structure is widely applied to various test furnaces for heating and is not described herein; the connecting line between the central point of the first mounting table 307 and the central point of the second mounting table 308 is parallel to the tangent line of the rotating track at the center of the corresponding bin body 301, and for a tester standing in front of the material containing assembly 3, the end cover 32 is transversely opened, so that the situation that steam rushes to the face due to the fact that the end cover 32 is opened because steam is not released due to misoperation can be avoided, and the use safety is greatly improved.
The heating cavity 21 is filled with protective gas; the protective gas is any one of nitrogen and inert gas, and can prevent the heating wire from being exposed in the air to be oxidized when the temperature of the heating wire is increased, so that the service life of the heating wire is shortened; an air groove 231 is arranged on the outer side of the sliding block 23; two ends of the air groove 231 are respectively communicated with the first chamber 201 and the second chamber 202; the heat conducting plate 25 comprises a plurality of unit plates 251; the plurality of unit plates 251 are spliced end to end along the length direction of the heat conducting plate 25; an insulating belt 252 is arranged between the adjacent unit plates 251; each unit plate 251 corresponds to one bin body 301, and the heat insulation belt 252 can avoid the influence of heat conduction between the adjacent unit plates 251, so that the adjustment of heating areas with different numbers can be realized more accurately.
A first lead 203 is connected to one end of the heating wire 22 with a fixed position; the first lead 203 is embedded in the wall surface of the temperature rising cavity 21; one end of the first lead 203, which is far away from the heating wire 22, extends to the outside of the warming cavity 21 and is electrically connected with a power supply; a heat insulation pipe 232 is connected to one side of the sliding block 23, which is back to the first chamber 201; one end of the heat insulation pipe 232 far away from the sliding block 23 extends to the outside of the second chamber 202 through the wall surface of the second chamber; a second lead 204 is arranged in the heat insulation pipe 232; the second lead 204 is embedded in the sliding block 23 and is connected with the corresponding end of the heating wire 22; one end of the second wire 204, which is far away from the sliding block 23, passes through the wire slot 209 and then extends out of the temperature rising cavity 21, and is electrically connected with a power supply; the part of the insulating tube 232 positioned in the second chamber 202 can prevent the second lead 204 from being directly exposed to higher temperature, so that the working stability of the power supply circuit is improved; the heat insulation pipe 232 can be made of asbestos materials, so that the pipe has certain bending capacity and can meet the requirement of reciprocating motion in an annular space.
As shown in fig. 3 and 4, the two side wall surfaces of the temperature raising cavity 21 in the length direction are embedded with auxiliary heat conducting members 26; the upper end of the auxiliary heat conducting piece 26 vertically extends into the material containing assembly 3, so that heat in the first cavity 201 can be quickly conducted into the corresponding bin body 301, and is conducted with the heat conducting plate 25 together, the heating capacity can be obviously improved, and the detection efficiency is improved; the structure surface of the auxiliary heat conducting piece 26 in the material containing assembly 3 is sleeved with a heat radiating cover 261; a plurality of heat dissipation holes 262 are formed in the heat dissipation cover 261; the structure of the heat dissipation cover 261 can increase the contact area between itself and air, so that heat dissipation is better performed; the heat dissipation holes 262 further increase the surface area and enhance the heat dissipation effect while keeping the volume of the heat dissipation cover 261 unchanged.
As shown in fig. 6 and 7, the test bed 6 is also included; the test bed 6 is arranged at the top of the heating assembly 2; a second heat insulation plate 259 is arranged between the test bed 6 and the heating assembly 2, so that heat in the heating assembly is prevented from being conducted to the table top to influence the operation of a tester; the test bed 6 comprises a cabinet body 61 and a table board 62; the table board 62 is arranged at the top of the cabinet body 61; the upper end of the table board 62 is provided with a storage groove 63; a cover plate 64 is arranged at the top of the storage groove 63 in a sliding fit manner; the cabinet body 61 is used for storing various reagents, test tools and the like with a large quantity, and glassware with high use frequency, heat insulation tongs for taking out samples and the like can be placed in the storage groove 63; an inclined surface 65 is arranged on one side, close to the experimenter, in the storage groove 63; the included angle between the inclined plane 65 and the horizontal plane is 45-60 degrees; when an experimenter needs to take the articles, the experimenter only needs to hook the articles with fingers, then drag the articles along the inclined plane 65 onto the table top and hold the articles in hands, and compared with the grabbing action of stretching into the storage groove, the grabbing action is quicker and more labor-saving; a drying plate 66 is arranged above the bottom surface of the storage groove 63 at intervals; a grating plate 67 is embedded on the drying plate 66 to avoid water accumulation at the bottom of the tank; the lower part of the drying plate 66 is communicated with an air duct 8, and a fan is adopted to force air to flow, so that the bottom of the groove can be kept dry.
The detection method of the total nitrogen detection system for water quality detection comprises the following steps,
step one, taking a proper amount of water sample into a 25ml colorimetric tube, diluting the water sample to 10ml of marked line by using non-ammonia water, adding 5ml of alkaline potassium persulfate solution, plugging a ground plug, and tightly wrapping a tube plug by using gauze and a yarn rope to obtain a sample 4;
step two, placing the sample 4 into the bin body 301, closing the end cover 32, then adjusting the heating wire 22 to a corresponding position below the bin body 301 for heating, specifically, heating to 120-;
step three, continuously taking a next water sample, and repeating the operation of the step one to obtain a new sample 4; a new sample 4 is then placed in the cartridge body adjacent to the heating area, and the length of the stretching heating wire 22 encloses the newly activated cartridge body into the heating area; so as to heat two samples which are put in at different time;
step four, when the first sample 4 is heated, the other bin bodies 301 are in a heat preservation state; then opening a bin body air outlet valve corresponding to the first sample 4, and opening an end cover 32 to take out the sample 4 after releasing steam; if a new sample 4 is added in the midway, repeating the process of the third step; because the total heating time corresponding to one sample (4) is half more than an hour, in consideration of the time for making a new sample, only 2 groups of samples placed at different time points exist in the material containing assembly 3 at the same time, the power required by the newly placed sample during heat preservation is not high, and at the moment, the corresponding air outlet valve for placing the samples in advance is opened, so that the redundant heat loss caused by completely stopping the working of the heating wire can be ignored;
step five, cooling the sample 4 to room temperature, adding 1ml of hydrochloric acid, and diluting the hydrochloric acid to 25ml of marked line by using non-ammonia water; on an ultraviolet spectrophotometer, taking ammonia-free water as a reference, and measuring absorbance at wavelengths of 220nm and 275nm respectively by using 10ml quartz cuvettes; the ultraviolet spectrophotometer can be obtained by direct purchase and can be arranged on the table top of the test bed 6, thereby being convenient for centralized operation and avoiding the process that a laboratory technician rushes among a plurality of devices;
replacing the water sample with ammonia-free water, and performing whole-process blank measurement;
step seven, calculating; and subtracting the absorbance of the blank test from the absorbance measured by the water sample, and checking the total nitrogen content from the calibration curve.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (6)
1. A total nitrogen detecting system for water quality testing which characterized in that: comprising a sterilisation unit (1); the disinfection unit (1) comprises a heating assembly (2) and a material containing assembly (3); the heating component (2) comprises a temperature rising cavity (21), a heating wire (22) and a sliding block (23); the sliding block (23) is arranged in the temperature rising cavity (21); the sliding block (23) reciprocates along the length direction of the warming cavity (21); the sliding block (23) divides the temperature rising cavity (21) into a first cavity (201) and a second cavity (202); the heating wire (22) is arranged in the first chamber (201); one end of the heating wire (22) far away from the sliding block (23) is fixedly connected with the wall surface of the first cavity (201); one end of the heating wire (22) close to the second cavity (202) is connected with the sliding block (23) and stretches synchronously along with the movement of the sliding block (23); a sample (4) is placed in the material containing assembly (3); the material containing assembly (3) is correspondingly arranged above the heating assembly (2); a heat conducting plate (25) is arranged between the material containing component (3) and the heating component (2); the sliding block (23) is moved, and the heating area of the material containing assembly (3) corresponding to the upper part of the heating wire (22) is correspondingly changed;
protective gas is filled in the temperature rising cavity (21); the protective gas is any one of nitrogen and inert gas; an air groove (231) is formed in the outer side of the sliding block (23); two ends of the air groove (231) are respectively communicated with the first cavity (201) and the second cavity (202); the heat conducting plate (25) comprises a plurality of unit plates (251); the plurality of unit plates (251) are spliced end to end along the length direction of the heat-conducting plate (25); a heat insulation belt (252) is arranged between the adjacent unit plates (251);
the material containing assembly (3) comprises a material cavity (31); the material cavity (31) and the heating cavity (21) are both of annular structures; the material cavity (31) is formed by annularly splicing a plurality of bin bodies (301); a first heat insulation plate (302) is arranged between the adjacent bin bodies (301); an end cover (32) is arranged at the top of the bin body (301); the end cover (32) is in sealing fit with the bin body (301); an air outlet valve (321) is arranged on the end cover (32).
2. The total nitrogen detection system for water quality detection according to claim 1, wherein: one end of the heating wire (22) with a fixed position is connected with a first lead (203); the first lead (203) is embedded in the wall surface of the temperature rising cavity (21); one end of the first lead (203), which is far away from the heating wire (22), extends to the outside of the temperature rising cavity (21) and is electrically connected with a power supply; a heat insulation pipe (232) is connected to one side of the sliding block (23) back to the first cavity (201); one end of the heat insulation pipe (232) far away from the sliding block (23) passes through the wall surface of the second chamber (202) and extends to the outside of the second chamber; a second lead (204) is arranged in the heat insulation pipe (232); the second lead (204) is embedded into the sliding block (23) and is connected with the corresponding end of the heating wire (22); one end of the second lead (204) far away from the sliding block (23) extends out of the temperature rising cavity (21) and is electrically connected with a power supply.
3. The total nitrogen detection system for water quality detection according to any one of claims 1 to 2, wherein: auxiliary heat conducting pieces (26) are embedded on two side wall surfaces of the temperature rising cavity (21) in the length direction; the upper end of the auxiliary heat conducting piece (26) vertically extends into the material containing assembly (3); the surface of the structure of the auxiliary heat conducting piece (26) in the material containing assembly (3) is sleeved with a heat dissipation cover (261); a plurality of heat dissipation holes (262) are formed in the heat dissipation cover (261).
4. The total nitrogen detection system for water quality detection according to claim 1, wherein: a first mounting table (307) and a second mounting table (308) are respectively arranged on two opposite sides of the top of the bin body (301); one side of the end cover (32) is hinged and matched with the first mounting table (307), and the other side of the end cover is buckled with the second mounting table (308); the connecting line between the central point of the first mounting table (307) and the central point of the second mounting table (308) is parallel to the tangent line of the rotating track at the center of the corresponding cabin body (301).
5. The total nitrogen detection system for water quality detection according to claim 1, wherein: also comprises a test bed (6); the test bed (6) is arranged at the top of the heating assembly (2); a second heat insulation plate (259) is arranged between the test bed (6) and the heating assembly (2); the test bed (6) comprises a cabinet body (61) and a table top (62); the table board (62) is arranged at the top of the cabinet body (61); the upper end of the table top (62) is provided with a storage groove (63); a cover plate (64) is arranged at the top of the storage groove (63) in a sliding fit manner; an inclined plane (65) is arranged on one side, close to the laboratory technician, in the storage groove (63); the included angle between the inclined plane (65) and the horizontal plane is 45-60 degrees; a drying plate (66) is arranged above the bottom surface of the storage groove (63) at intervals; a grid plate (67) is embedded on the drying plate (66); an air duct (8) is communicated and arranged below the drying plate (66).
6. The detection method of the total nitrogen detection system for water quality detection according to claim 1, wherein: comprises the following steps of (a) carrying out,
step one, taking a proper amount of water sample into a 25ml colorimetric tube, diluting the water sample to 10ml of marked line by using non-ammonia water, adding 5ml of alkaline potassium persulfate solution, plugging a ground plug, and tightly wrapping a tube plug by using gauze and a yarn rope to obtain a sample (4);
secondly, placing the sample (4) into the bin body (301), closing the end cover (32), and then adjusting the heating wire (22) to a corresponding position below the bin body (301) for heating;
step three, continuously taking a next water sample, and repeating the operation of the step one to obtain a new sample (4); then a new sample (4) is placed in the cabin body adjacent to the heating area, and the length of the stretching heating wire (22) encapsulates the newly activated cabin body into the heating area; so as to heat two samples which are put in at different time;
step four, when the first sample (4) is heated, the other bin bodies (301) are in a heat preservation state; then opening a bin body air outlet valve corresponding to the first sample (4), and opening an end cover (32) to take out the sample (4) after steam is discharged; if a new sample (4) is added in the middle, repeating the process of the third step;
step five, cooling the sample (4) to room temperature, adding 1ml of hydrochloric acid, and diluting the solution to 25ml of marked line by using non-ammonia water; on an ultraviolet spectrophotometer, taking ammonia-free water as a reference, and measuring absorbance at wavelengths of 220nm and 275nm respectively by using 10ml quartz cuvettes;
replacing the water sample with ammonia-free water, and performing whole-process blank measurement;
step seven, calculating; and subtracting the absorbance of the blank test from the absorbance measured by the water sample, and checking the total nitrogen content from the calibration curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910775988.1A CN110361348B (en) | 2019-08-22 | 2019-08-22 | Total nitrogen detection system for water quality detection and total nitrogen detection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910775988.1A CN110361348B (en) | 2019-08-22 | 2019-08-22 | Total nitrogen detection system for water quality detection and total nitrogen detection method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110361348A CN110361348A (en) | 2019-10-22 |
| CN110361348B true CN110361348B (en) | 2021-12-03 |
Family
ID=68225094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910775988.1A Active CN110361348B (en) | 2019-08-22 | 2019-08-22 | Total nitrogen detection system for water quality detection and total nitrogen detection method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110361348B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9398640B2 (en) * | 2012-12-21 | 2016-07-19 | Halliburton Energy Services, Inc. | Digital multi-use thermo-cup |
| WO2018100017A1 (en) * | 2016-12-01 | 2018-06-07 | Ventana Medical Systems, Inc. | Method and system for treating biological samples |
| CN208568375U (en) * | 2018-07-11 | 2019-03-01 | 钟丽菊 | A kind of total phosphorus and total nitrogen on-line monitoring sampling system control cabinet |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980865A (en) * | 2012-11-17 | 2013-03-20 | 中国水产科学研究院渔业机械仪器研究所 | Measurement method for seawater total nitrogen content |
| US10775297B2 (en) * | 2016-08-24 | 2020-09-15 | Ecotec Solutions, Inc. | Laser absorption spectroscopy system and method for discrimination of a first and a second gas |
| US10228359B2 (en) * | 2017-03-16 | 2019-03-12 | Gecko Alliance Group Inc. | Method, device and apparatus for monitoring halogen levels in a body of water |
| CN107561237A (en) * | 2017-09-30 | 2018-01-09 | 浙江水知音检测有限公司 | Urban river water total nitrogen, ammonia nitrogen and total phosphorus content measure device |
| CN108303289A (en) * | 2018-03-05 | 2018-07-20 | 杭州微智兆智能科技有限公司 | Long-range water quality sampling Quality Control instrument |
-
2019
- 2019-08-22 CN CN201910775988.1A patent/CN110361348B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9398640B2 (en) * | 2012-12-21 | 2016-07-19 | Halliburton Energy Services, Inc. | Digital multi-use thermo-cup |
| WO2018100017A1 (en) * | 2016-12-01 | 2018-06-07 | Ventana Medical Systems, Inc. | Method and system for treating biological samples |
| CN208568375U (en) * | 2018-07-11 | 2019-03-01 | 钟丽菊 | A kind of total phosphorus and total nitrogen on-line monitoring sampling system control cabinet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110361348A (en) | 2019-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106092773A (en) | A kind of simulation soaks Soil Direct Shear assay device and the method air-drying Circulation | |
| CN205234999U (en) | B -ultrasonic probe disinfecting device | |
| CN206935975U (en) | A kind of test tube batch cleaning device | |
| CN110361348B (en) | Total nitrogen detection system for water quality detection and total nitrogen detection method thereof | |
| CN210221401U (en) | Pressure measuring and leakage detecting testing machine for water-cooled motor shell | |
| CN102147343A (en) | High-temperature stacking test device for packing container | |
| CN109398769B (en) | Normal-pressure thermal test system of large-scale walk-in manned spacecraft | |
| CN107490526B (en) | Nondestructive testing device and method for aging effect of high polymer material | |
| CN102608267A (en) | Artificial board VOC (Volatile Organic Compounds) releasing cabin capable of guaranteeing limit value of background gas concentration of cabin body | |
| US11460393B2 (en) | System and method for accelerated weathering testing of insulating glass units | |
| CN211461348U (en) | Equipment disinfection and sterilization device for microbial detection | |
| CN209802905U (en) | Full-automatic gas and shale gas adsorption constant tester | |
| CN112483898A (en) | Automatic nitrogen charging device and using method | |
| CN218014210U (en) | Intelligent ammeter electronic components sieving mechanism | |
| CN217900325U (en) | Drying device | |
| CN216669672U (en) | Paint film dry heat resistance test automatic equipment | |
| CN204461933U (en) | The weighing system of full-automatic many barrels textile ventilated oven | |
| CN104525283A (en) | Test chamber with reliability enhancement test function in ultra-high temperature microenvironment and test method thereof | |
| CN219038582U (en) | Temperature-control heating testing device for airtight coring sample | |
| CN111939681B (en) | Device for conveying normal-temperature liquid through pipeline and treating tail gas | |
| CN218646856U (en) | Mural paint color-changing reaction experimental device | |
| RU2579643C1 (en) | Apparatus for mechanical tests in conditions of low-cycle loading of samples from toxic materials | |
| CN215065076U (en) | Pressure vessel sealing inspection device | |
| CN212693585U (en) | Spectral detection hot table device | |
| CN215065924U (en) | Device for testing water absorption and/or saturated water absorption of rock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20211117 Address after: 570100 No. 112, building 3, Lin'an International Trade City, No. 361, Yehai Avenue, Longhua District, Haikou City, Hainan Province Applicant after: Hainan Juxing Environmental Protection Technology Co.,Ltd. Address before: 214200 Lixin Technology Co., Ltd., 1201 Science Park, No. 62 Xincheng Road, Yixing City, Wuxi City, Jiangsu Province Applicant before: Zhao Yunhong |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |