CN213091326U - Online automatic digestion device - Google Patents
Online automatic digestion device Download PDFInfo
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- CN213091326U CN213091326U CN202021115264.9U CN202021115264U CN213091326U CN 213091326 U CN213091326 U CN 213091326U CN 202021115264 U CN202021115264 U CN 202021115264U CN 213091326 U CN213091326 U CN 213091326U
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Abstract
The utility model relates to an online automatic digestion device has combined online high temperature digestion ware and ultraviolet digestion ware to add corresponding agent of clearing up in the stage of clearing up of difference, clear up fastly, be used for with the cooperation of on-line monitoring instrument, realize the online continuous rapid monitoring of quality of water. The utility model discloses in, solid-liquid separator utilizes the toper cavity, and based on the effect of centrifugal force and the gravity that the fluid turned to, the separation is not cleared up into the granule of solution, avoids the granule to get into the on-line monitoring instrument. The utility model discloses need not to use many selector valves, first control valve, second control valve adopt check valve or ooff valve, allow the water sample liquid that contains suspended particles to pass through smoothly, and water sample liquid only flows in internal diameter 1mm ~ 8 mm's flow path, other parts such as syringe do not flow through, and then have eliminated the risk that suspended particles blockked up the pipeline basically.
Description
Technical Field
The utility model relates to a digestion device technical field, more specifically say, relate to an online automatic digestion device.
Background
In environmental water quality monitoring, total nitrogen, total phosphorus, heavy metals and the like are important parameters for evaluating the water quality. The eutrophication of water body is easily caused by too high content of total nitrogen and total phosphorus, and further the ecological balance of surface water environments such as rivers, lakes, near-shore seawater and the like is destroyed, and even life and property loss which is difficult to estimate is caused. The high concentration of mercury, arsenic, lead, cadmium, chromium, copper and other heavy metals in water directly affects the safety of drinking water and aquatic ecological environment, and is transferred to human beings and other animals through the enrichment of aquatic organisms and food chains, thus seriously harming human health and the survival of other animals. In view of this, comprehensive real-time online monitoring of total nitrogen, total phosphorus and heavy metals in water environments is necessary.
According to the national standard method, the total nitrogen and the total phosphorus are detected by adding an oxidant into a water sample and then carrying out high-temperature and high-pressure digestion, converting organic nitrogen, ammonia nitrogen, organic phosphorus, polyphosphate and the like in the water into nitrate and phosphate, and then carrying out analysis and detection. While heavy metals in water usually exist partially in the form of micro particles and colloid of organic complex, and a digestion reagent must be added for heating digestion and conversion into an ion form, so that accurate concentration data can be obtained.
The conventional manual sample digestion method needs complex and time-consuming operation processes such as water sample measurement, reagent addition, heating and pressurizing and the like, and cannot meet the requirements of an online monitoring instrument.
In order to solve the defects of manual digestion of samples, in the prior art, a sequencing batch digestion method combining an injection pump or a peristaltic pump, a multi-position selection valve and a high-temperature and high-pressure valve is used for solving the problem of online automatic digestion, but a large amount of time is consumed for heating, pressurizing, cooling and depressurizing, and the detection speed of an online instrument is limited; on the other hand, the application of the injection pump and the multi-position selection valve also determines that the technology cannot be used for digesting a water sample with higher suspended matter concentration, so that the representativeness of sampling by an online instrument is limited, and the monitoring result of the online instrument is often lower than that of a manual detection technology of a national standard method.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide an online automatic digestion device, it is fast to clear up, cooperates with the on-line monitoring instrument, realizes the online continuous quick monitoring of quality of water.
The technical scheme of the utility model as follows:
an on-line automatic digestion device comprises a bidirectional pump, a liquid storage coil, a high-temperature digestion device, an ultraviolet digestion device and a solid-liquid separator which are sequentially connected through a pipeline; the water sample inlet is communicated between the liquid storage coil and the high-temperature digestion device through a first three-way pipe; a first control valve is arranged between the water sample inlet and the first three-way pipe fitting, and a second control valve is arranged between the first three-way pipe fitting and the high-temperature digestion device; a first metering pump is connected between the second control valve and the inlet of the high-temperature digestion device through a second three-way pipe fitting and is used for pumping a first digestion solution and mixing the first digestion solution with a water sample; and a second metering pump is connected between the high-temperature digestion device and the ultraviolet digestion device through a third tee pipe fitting and is used for pumping a second digestion solution into the high-temperature digestion device and mixing the second digestion solution with a water sample flowing out of the high-temperature digestion device.
Preferably, the bidirectional pump is further connected with a three-way valve, one port of the three-way valve is communicated with the atmosphere, and the other port of the three-way valve is connected with the cleaning liquid.
Preferably, a plurality of first control valves which are arranged in sequence are arranged between the water sample inlet and the first three-way pipe, and a plurality of second control valves which are arranged in sequence are arranged between the first three-way pipe and the high-temperature digester.
Preferably, the first control valve is a first one-way valve, the second control valve is a second one-way valve, the flow direction of the first one-way valve is that the water sample inlet flows to the first three-way pipe, and the flow direction of the second one-way valve is that the first three-way pipe flows to the high-temperature digestion device.
Preferably, the water sample inlet, the liquid storage coil and the high-temperature digestion device are communicated in a crossing manner through a three-way electromagnetic valve or a three-way pinch valve.
Preferably, the high-temperature digestion device comprises a heat-preservation shell, a high-temperature digestion reaction coil and a heating rod, wherein the heating rod is arranged in the heat-preservation shell, the high-temperature digestion reaction coil is wound on the heating rod, and two ends of the high-temperature digestion reaction coil extend out of the heat-preservation shell.
Preferably, the ultraviolet digestion device comprises a shell with a totally reflected inner wall, an ultraviolet digestion reaction coil and an ultraviolet lamp tube, wherein the ultraviolet lamp tube is arranged in the shell with the totally reflected inner wall, the ultraviolet digestion reaction coil is wound around the ultraviolet lamp tube, and the shell with the totally reflected inner wall extends out of two ends of the ultraviolet digestion reaction coil.
Preferably, the solid-liquid separator comprises a conical cavity, a solid-liquid separation liquid inlet pipe, an atmosphere communicating pipe, a solid-liquid separation liquid outlet pipe and a waste liquid pipe, wherein the top end of the conical cavity is arranged downwards; a first switch valve is arranged on the air through pipe, a second switch valve is arranged on the solid-liquid separation liquid outlet pipe, and a third switch valve is arranged on the waste liquid pipe.
Preferably, the end part of the solid-liquid separation liquid inlet pipe extends to be close to the inner wall of the conical cavity.
Preferably, the inner diameters of the pipeline, the liquid storage coil, the high-temperature digestion reaction coil and the ultraviolet digestion reaction coil are 1-8 mm.
The utility model has the advantages as follows:
online automatic digestion device, online high temperature digestion ware and ultraviolet digestion ware have been combined to add corresponding agent of clearing up in the stage of clearing up of difference, clear up fastly, be used for with the cooperation of on-line monitoring instrument, realize the online continuous quick monitoring of quality of water. The utility model discloses in, solid-liquid separator utilizes the toper cavity, and based on the effect of centrifugal force and the gravity that the fluid turned to, the separation is not cleared up into the granule of solution, avoids the granule to get into the on-line monitoring instrument.
The utility model discloses need not to use many selector valves, first control valve, second control valve adopt check valve or ooff valve, allow the water sample liquid that contains suspended particles to pass through smoothly, and water sample liquid only flows in internal diameter 1mm ~ 8 mm's flow path, other parts such as syringe do not flow through, and then have eliminated the risk that suspended particles blockked up the pipeline basically.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural diagram of a high temperature digester;
FIG. 3 is a schematic structural diagram of a UV digester;
FIG. 4 is a schematic view of the structure of a solid-liquid separator;
in the figure: 10 is a bidirectional pump, 11 is a three-way valve, 20 is a liquid storage coil pipe, 30 is a high-temperature digestion device, 31 is a heat-insulating shell, 32 is a high-temperature digestion reaction coil pipe, 33 is a heating rod, 40 is an ultraviolet digestion device, 41 is a shell with total internal reflection, 42 is an ultraviolet digestion reaction coil pipe, 43 is an ultraviolet lamp tube, 50 is a solid-liquid separator, 51 is a conical cavity, 52 is a solid-liquid separation liquid inlet pipe, 53 is a through gas pipe, 54 is a solid-liquid separation liquid outlet pipe, 55 is a waste liquid pipe, 56 is a first switch valve, 57 is a second switch valve, 58 is a third switch valve, 61 is a first three-way pipe, 62 is a second three-way pipe, 63 is a third three-way pipe, 71 is a first control valve, 72 is a second control valve, 81 is a first metering pump, 82 is a second metering pump, 91 is a first digestion solution reagent bottle, 92 is a second digestion solution reagent bottle, 93 is a waste solution bottle, 94 is a current-carrying reagent bottle, and.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The utility model provides an on-line automatic digestion device, which comprises a bidirectional pump 10, a liquid storage coil pipe 20, a high temperature digestion device 30, an ultraviolet digestion device 40 and a solid-liquid separator 50 which are connected in sequence through pipelines (polytetrafluoroethylene pipes can be adopted), as shown in figure 1; the water sample inlet 100 is communicated between the liquid storage coil 20 and the high temperature digester 30 through a first tee pipe 61. A first control valve 71 is arranged between the water sample inlet 100 and the first three-way pipe 61, and a second control valve 72 is arranged between the first three-way pipe 61 and the high temperature digester 30, and is respectively used for controlling the flow direction of the water sample. In this embodiment, a plurality of first control valves 71 arranged in sequence are disposed between the water sample inlet 100 and the first tee pipe 61, and a plurality of second control valves 72 arranged in sequence are disposed between the first tee pipe 61 and the high temperature digester 30, so that influence of large particles possibly existing on the tightness of the first control valve 71 and the second control valve 72 can be avoided, and further the reliability of flow path control is ensured.
The second control valve 72 is connected with the inlet of the high-temperature digestion device 30 through a second three-way pipe 62 to form a first metering pump 81, and the first metering pump 81 is connected with a first digestion solution reagent bottle 91 filled with a first digestion solution and is used for pumping the first digestion solution and mixing the first digestion solution with a water sample; the second metering pump 82 is connected between the high-temperature digestion device 30 and the ultraviolet digestion device 40 through a third three-way pipe 63, and the second metering pump 82 is connected with a second digestion solution reagent bottle 92 filled with a second digestion solution and used for pumping the second digestion solution and mixing the second digestion solution with a water sample flowing out of the high-temperature digestion device 30.
In order to facilitate controlling the inflow of the water sample and simultaneously realize the cleaning after use, in this embodiment, the bidirectional pump 10 is further connected to the three-way valve 11, one port of the three-way valve 11 is connected to the atmosphere, and the other port is connected to the cleaning solution (connected to the current-carrying reagent bottle 94 containing the cleaning solution). The three-way valve 11 adopts a two-position three-way valve 11, which can be an electromagnetic three-way valve 11 or an electromagnetic pinch valve.
As shown in fig. 2, the pyrolysis device 30 includes a heat-insulating housing 31, a pyrolysis reaction coil 32, and a heating rod 33, wherein the heating rod 33 is disposed in the heat-insulating housing 31, the pyrolysis reaction coil 32 is wound around the heating rod 33, and two ends of the pyrolysis reaction coil 32 extend out of the heat-insulating housing 31. In this embodiment, in order to improve the application range of the high temperature digester 30 to different water samples, the heating rod 33 is implemented to be temperature controllable, and the temperature range can be controlled to be 30-250 ℃; the high-temperature digestion reaction coil 32 adopts a polytetrafluoroethylene tube or a quartz tube.
As shown in fig. 3, the ultraviolet digestion device 40 includes a housing 41 with a total internal reflection, an ultraviolet digestion reaction coil 42, and an ultraviolet lamp 43, the ultraviolet lamp 43 is disposed in the housing 41 with a total internal reflection, the ultraviolet digestion reaction coil 42 is wound around the ultraviolet lamp 43, and two ends of the ultraviolet digestion reaction coil 42 extend out of the housing 41 with a total internal reflection. In this embodiment, the ultraviolet lamp 43 is a quartz tube or other transparent tube that can transmit ultraviolet rays.
As shown in fig. 4, the solid-liquid separator 50 includes a conical cavity 51, a liquid inlet pipe 52 for solid-liquid separation, an atmosphere pipe 53, a liquid outlet pipe 54 for solid-liquid separation, and a waste liquid pipe 55, wherein the top end of the conical cavity 51 is disposed downward (i.e. the conical cavity 51 is inverted, the top end is downward, and the wide end is upward, in this embodiment, the conical cavity 51 is a cone), the waste liquid pipe 55 is disposed at the top end of the conical cavity 51, and the liquid inlet pipe 52 for solid-liquid separation and the atmosphere pipe 53 are disposed at the bottom end of the. The liquid inlet pipe 52 extends into the tapered cavity 51, and in order to generate a sufficient action effect of turning back upward after the water sample enters the tapered cavity 51, in the present embodiment, the end of the liquid inlet pipe 52 extends to be close to the inner wall of the tapered cavity 51. The solid-liquid separation liquid outlet pipe 54 is arranged at the waist part of the conical cavity 51. The atmospheric pipe 53 is provided with a first switch valve 56, the solid-liquid separation liquid outlet pipe 54 is provided with a second switch valve 57, the waste liquid pipe 55 is provided with a third switch valve 58, and the waste liquid pipe 55 can also be connected with a waste liquid bottle 93 for directly collecting waste liquid. The first switch valve 56, the second switch valve 57, and the third switch valve 58 are solenoid pinch valves or solenoid diaphragm valves.
In the utility model, the inner diameter of the pipeline, the liquid storage coil 20, the high temperature digestion reaction coil 32 and the ultraviolet digestion reaction coil 42 is 1 mm-8 mm, and the outer diameter is 1.5 mm-10 mm; furthermore, the water sample only flows in the flow path with the inner diameter of 1 mm-8 mm and does not flow through other parts such as an injector, and the risk that the suspended particles block the pipeline is basically eliminated.
In specific implementation, the first control valve 71 is a first one-way valve, the second control valve 72 is a second one-way valve, the flow direction of the first one-way valve is that the water sample inlet 100 flows to the first three-way pipe 61, and the flow direction of the second one-way valve is that the first three-way pipe 61 flows to the high temperature digestion device 30; the one-way valve is a one-way ball valve or a diaphragm valve made of polytetrafluoroethylene. Instead of a one-way valve, a switching valve, i.e. a solenoid pinch valve or a solenoid diaphragm valve, may also be used.
As another embodiment, a three-way electromagnetic valve or a three-way pinch valve may be used to replace the first three-way pipe 61, the first control valve 71, and the second control valve 72, that is, the water sample inlet 100, the liquid storage coil 20, and the high temperature digester 30 are in intersection communication through the three-way electromagnetic valve or the three-way pinch valve.
The bi-directional pump 10 employs a peristaltic pump, syringe pump or plunger pump with controllable direction. The metering pump adopts peristaltic pump, syringe pump or plunger pump etc. can accurate measurement flow rate and resistant chemical reagent's pump.
The working process of the embodiment is as follows:
the three-way valve 11 is switched to a valve position communicated with the atmosphere, the two-way pump 10 firstly runs leftwards, the first control valve 71 is automatically opened, the second control valve 72 is automatically closed, a water sample is sucked into the liquid storage coil pipe 20 from the water sample inlet 100, and the running speed and time of the two-way pump 10 are controlled, so that the volume of the water sample sucked into the liquid storage coil pipe 20 can be accurately controlled.
After a certain amount of water sample is sucked, the bidirectional pump 10 reversely rotates, the first control valve 71 is automatically closed, the second control valve 72 is automatically opened, the water sample in the liquid storage coil pipe 20 is pushed out to the second three-way pipe 62 through the first three-way pipe 61 and the second control valve 72, meanwhile, the first metering pump 81 is started, and the first digestion solution is pumped into the second three-way pipe 62 to be mixed with the water sample.
The mixed solution of the water sample and the first digestion solution flows out of the second three-way pipe 62 and enters the high-temperature digestion device 30 for high-temperature digestion reaction.
The solution after high temperature digestion flows out of the high temperature digestion device 30, the second metering pump 82 is started, the second digestion solution is pumped into the third three-way pipe 63, is mixed with the solution after high temperature digestion, and then enters the ultraviolet digestion device 40 for ultraviolet digestion.
The first switch valve 56 and the second switch valve 57 are opened, the third switch valve 58 is closed, the solution after ultraviolet digestion flows out from the ultraviolet digestor 40, flows into the conical cavity 51 through the solid-liquid separation liquid inlet pipe 52 of the solid-liquid separator 50, flows from top to bottom to the inner wall close to the top of the solid-liquid separator 50, returns back and flows upwards, is discharged from the solid-liquid separation liquid outlet pipe 54 through the second switch valve 57, and enters the online analyzer. In the process that the solution returns back to flow upwards, the residual particles which cannot be digested stay at the bottom of the solid-liquid separator 50, namely the top end of the conical cavity 51, under the action of gravity and centrifugal force, so that the particles are prevented from entering an online analysis instrument.
During this time, the bi-directional pump 10 is continuously operated to draw in air to continuously evacuate the liquid from the reservoir coil 20, the pyrometer 30 and the uv digestor 40.
The three-way valve 11 is switched to the cleaning solution valve position, the third on-off valve 58 of the solid-liquid separator 50 is opened, the bidirectional pump 10 continuously operates rightward, the first metering pump 81 and the second metering pump 82 stop, the cleaning solution is used for cleaning the liquid storage coil 20, the high-temperature digestion device 30, the ultraviolet digestion device 40 and the solid-liquid separator 50, and the particulate matter remaining at the bottom of the solid-liquid separator 50 is discharged to the waste liquid bottle 93 from the waste liquid pipe 55 of the solid-liquid separator 50.
The three-way valve 11 is switched to the atmospheric valve position, the bidirectional pump 10 is continuously operated to pump air, and the cleaning liquid in the liquid storage coil 20, the high-temperature digestion device 30, the ultraviolet digestion device 40 and the solid-liquid separator 50 is emptied.
Repeating the steps to start the digestion treatment of the next sample.
The above embodiments are merely illustrative, and not restrictive, of the present invention. Changes, modifications, etc. to the above-described embodiments are intended to fall within the scope of the claims of the present invention, as long as they are in accordance with the technical spirit of the present invention.
Claims (10)
1. An on-line automatic digestion device is characterized by comprising a bidirectional pump, a liquid storage coil, a high-temperature digestion device, an ultraviolet digestion device and a solid-liquid separator which are sequentially connected through pipelines; the water sample inlet is communicated between the liquid storage coil and the high-temperature digestion device through a first three-way pipe; a first control valve is arranged between the water sample inlet and the first three-way pipe fitting, and a second control valve is arranged between the first three-way pipe fitting and the high-temperature digestion device; a first metering pump is connected between the second control valve and the inlet of the high-temperature digestion device through a second three-way pipe fitting and is used for pumping a first digestion solution and mixing the first digestion solution with a water sample; and a second metering pump is connected between the high-temperature digestion device and the ultraviolet digestion device through a third tee pipe fitting and is used for pumping a second digestion solution into the high-temperature digestion device and mixing the second digestion solution with a water sample flowing out of the high-temperature digestion device.
2. The on-line automatic digestion device according to claim 1, characterized in that the bidirectional pump is further connected with a three-way valve, one port of the three-way valve is connected to the atmosphere, and the other port is connected to the cleaning solution.
3. The on-line automatic digestion device according to claim 1, characterized in that a plurality of first control valves arranged in sequence are arranged between the water sample inlet and the first three-way pipe, and a plurality of second control valves arranged in sequence are arranged between the first three-way pipe and the high temperature digestion device.
4. The on-line automatic digestion device according to claim 3, characterized in that the first control valve is a first one-way valve, the second control valve is a second one-way valve, the flow direction of the first one-way valve is that the water sample inlet flows to the first three-way pipe, and the flow direction of the second one-way valve is that the first three-way pipe flows to the high temperature digestion device.
5. The on-line automatic digestion device according to claim 1, characterized in that the water sample inlet, the liquid storage coil pipe and the high temperature digestion device are communicated by intersection of a three-way electromagnetic valve or a three-way pinch valve.
6. The on-line automatic digestion device according to claim 1, wherein the high temperature digestion device comprises a heat preservation shell, a high temperature digestion reaction coil and a heating rod, the heating rod is arranged in the heat preservation shell, the high temperature digestion reaction coil is wound around the heating rod, and two ends of the high temperature digestion reaction coil extend out of the heat preservation shell.
7. The on-line automatic digestion device according to claim 1, wherein the ultraviolet digestion device comprises a shell with total internal reflection, an ultraviolet digestion reaction coil and an ultraviolet lamp tube, the ultraviolet lamp tube is arranged in the shell with total internal reflection, the ultraviolet digestion reaction coil is wound around the ultraviolet lamp tube, and two ends of the ultraviolet digestion reaction coil extend out of the shell with total internal reflection.
8. The on-line automatic digestion device according to claim 1, characterized in that the solid-liquid separator comprises a conical cavity, a solid-liquid separation liquid inlet pipe, an atmospheric vent pipe, a solid-liquid separation liquid outlet pipe and a waste liquid pipe, wherein the top end of the conical cavity is arranged downwards, the waste liquid pipe is arranged at the top end of the conical cavity, the solid-liquid separation liquid inlet pipe and the atmospheric vent pipe are arranged at the bottom end of the conical cavity, the solid-liquid separation liquid inlet pipe extends into the conical cavity, and the solid-liquid separation liquid outlet pipe is arranged at the waist part of the conical cavity; a first switch valve is arranged on the air through pipe, a second switch valve is arranged on the solid-liquid separation liquid outlet pipe, and a third switch valve is arranged on the waste liquid pipe.
9. The on-line automatic digestion apparatus according to claim 8, characterized in that the end of the solid-liquid separation liquid inlet pipe extends to near the inner wall of the conical cavity.
10. The on-line automatic digestion device according to any one of claims 1 to 9, wherein the inner diameters of the pipeline, the liquid storage coil, the high temperature digestion reaction coil and the ultraviolet digestion reaction coil are 1mm to 8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021115264.9U CN213091326U (en) | 2020-06-16 | 2020-06-16 | Online automatic digestion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021115264.9U CN213091326U (en) | 2020-06-16 | 2020-06-16 | Online automatic digestion device |
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| Publication Number | Publication Date |
|---|---|
| CN213091326U true CN213091326U (en) | 2021-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021115264.9U Active CN213091326U (en) | 2020-06-16 | 2020-06-16 | Online automatic digestion device |
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| CN (1) | CN213091326U (en) |
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2020
- 2020-06-16 CN CN202021115264.9U patent/CN213091326U/en active Active
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