CN216222954U - Low temperature sample enrichment facility - Google Patents
Low temperature sample enrichment facility Download PDFInfo
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- CN216222954U CN216222954U CN202023082176.6U CN202023082176U CN216222954U CN 216222954 U CN216222954 U CN 216222954U CN 202023082176 U CN202023082176 U CN 202023082176U CN 216222954 U CN216222954 U CN 216222954U
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Abstract
The utility model relates to the technical field of sample water treatment for concentration and extraction, and discloses a low-temperature sample concentration device, which comprises an evaporation tank, a sample water inlet pipeline connected to the evaporation tank, a condensing tank and a negative pressure suction pipeline connected to the condensing tank, wherein the sample water inlet pipeline is connected to the evaporation tank; the sample water inlet pipeline is communicated with the negative pressure suction pipeline; the bottom of the evaporation tank is connected with a concentrated sample sampling pipeline, and the bottom of the condensation tank is connected with a discharge pipeline; and a semiconductor refrigerator for heating the evaporating tank and refrigerating the condensing tank is arranged between the evaporating tank and the condensing tank. This low temperature sample enrichment facility can be in vacuum low temperature steady operation, and evaporative concentration is efficient, and the maintenance cost is low, and long service life has formed one set of vacuum low temperature evaporative concentration system, has realized getting rid of vapor, condensate water and noncondensable gas, has improved the evaporative concentration efficiency of evaporating pot.
Description
Technical Field
The utility model relates to the technical field of concentrated extracted sample water treatment, in particular to a low-temperature sample concentrating device.
Background
In the prior art, a heat pump vacuum low-temperature evaporation concentration system comprises an evaporation tank, a heating circulation system, a negative pressure suction pipeline and a clean water circulation system. The upper part of the evaporating pot is connected with a water inlet pipe and a steam discharge pipe, and a water inlet heating system is arranged between the bottom and the water inlet pipeline. The clean water circulating system comprises a water tank, a water pump, a venturi and a heat dissipation and cooling device which are sequentially connected through pipelines. One end of the negative pressure suction pipeline is connected with the steam discharge pipe, the other end of the negative pressure suction pipeline is connected with the venturi inlet pipe, and the negative pressure suction pipeline is provided with a stop valve. The heat release side inlet of the evaporator in the heating circulating system is connected with the water outlet end pipeline of the venturi, and the heat release side outlet of the evaporator is connected to the water tank.
For the heating circulation system, most of mechanical energy input to a compressor in the heating circulation system for doing work is converted into heat energy input, and water vapor formed by evaporation of sample water after heat absorption is sucked by a Venturi to form vacuum and sucked into the distilled water circulation system, so that the water temperature of the distilled water is increased. In order to avoid the rise of water temperature, the heated distilled water and the refrigerator in the middle cylinder are subjected to heat exchange to achieve the purpose of temperature reduction, and most of heat is recycled into the circulating system. If effective heat dissipation measures cannot be taken, the working temperature of the whole heat absorption-evaporation concentration-condensation system is continuously increased until the temperature is increased until the heat dissipation loss of the whole circulating system is equal to the electric power input by the compressor, which causes the low-temperature evaporation concentration system to be incapable of working in a low-temperature environment.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a low temperature sample concentrating device to solve the above problems in the prior art.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a low-temperature sample concentration device comprises an evaporation tank, a sample water inlet pipeline connected to the evaporation tank, a condensation tank and a negative pressure suction pipeline connected to the condensation tank; the sample water inlet pipeline is communicated with the negative pressure suction pipeline; the bottom of the evaporation tank is connected with a concentrated sample sampling pipeline, and the bottom of the condensation tank is connected with a discharge pipeline; and a semiconductor refrigerator for heating the evaporating tank and refrigerating the condensing tank is arranged between the evaporating tank and the condensing tank.
According to the low-temperature sample concentrating device, the PTC constant-temperature heating sheet is arranged at the bottom of the evaporation tank.
According to the low-temperature sample concentrating device, the sample water inlet pipeline is communicated with the negative pressure suction pipeline through the steam pipeline.
According to the low-temperature sample concentrating device, the sample water inlet pipeline is connected with the water inlet valve.
According to the low-temperature sample concentration device, the negative pressure suction pipeline is connected with the vacuum pump, the negative pressure gauge and the exhaust valve.
According to the low-temperature sample concentrating device, the concentrated sample sampling pipeline is provided with the sampling valve.
According to the low-temperature sample concentrating device, the discharge pipeline is provided with the discharge valve.
The utility model has the beneficial effects that:
by applying the technical scheme of the utility model, the sample water enters the evaporation tank through the sample water inlet pipeline, and the semiconductor refrigerator heats the evaporation tank and simultaneously refrigerates the condensation tank. Because the negative pressure is in the system, the boiling point of the sample water is reduced, low-temperature evaporation is realized, steam is generated after the water is boiled and enters a condensing tank, and then the steam is pre-cooled and condensed in the condensing tank. Wherein, concentrated appearance water is discharged through the concentrated sample pipeline of evaporating pot bottom, and the comdenstion water is discharged through the emission pipeline of condensing pot bottom. This low temperature sample enrichment facility can be in vacuum low temperature steady operation, and evaporative concentration is efficient, and the maintenance cost is low, and long service life has formed one set of vacuum low temperature evaporative concentration system, has realized getting rid of vapor, condensate water and noncondensable gas, has improved the evaporative concentration efficiency of evaporating pot.
Drawings
FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;
FIG. 2 is an electrical schematic of FIG. 1;
reference numerals:
1-an evaporation tank; 2-a condensation tank; 3-a TEC controller; 4-an insulating layer; 5-a steam pipeline; 6-negative pressure gauge; 7-a vacuum pump; 8-a temperature sensor; 9-analog quantity level meter; 10-a water inlet valve; 11-an exhaust valve; 12-a sampling valve; 13-a discharge valve; 14-a filter; 15-PTC constant temperature heating sheet; 16-PLC; 17-negative pressure suction line; 18-sample water inlet pipe; 19-concentrated sample sampling line; 20-discharge line.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to the attached drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Examples
Referring to fig. 1, the present invention provides a low temperature sample concentration device, which includes an evaporation tank 1, a sample water inlet pipeline 18 connected to the evaporation tank 1, a condensation tank 2, and a negative pressure suction pipeline 17 connected to the condensation tank 2; the sample water inlet pipeline 18 is communicated with the negative pressure suction pipeline 17; the bottom of the evaporation tank 1 is connected with a concentrated sample sampling pipeline 19, and the bottom of the condensation tank 2 is connected with a condensed water discharge pipeline 20; and a semiconductor refrigerator for heating the evaporation tank 1 and the refrigeration condensation tank 2 is arranged between the evaporation tank 1 and the condensation tank 2.
In the above warm sample concentrating apparatus, there are further specifically the following improvements:
the bottom of the evaporation tank 1 is provided with a PTC constant temperature heating sheet 15.
The sample water inlet pipeline 18 is communicated with the negative pressure suction pipeline 17 through the steam pipeline 5. And the sample water inlet pipeline 18 is connected with the water inlet valve 10.
The negative pressure suction pipeline 17 is connected with a vacuum pump 7, a negative pressure gauge 6 and an exhaust valve 11. The negative pressure suction line 17 is provided with a filter 14 in cooperation with the vacuum pump 7.
The concentrated sample sampling pipeline 19 is provided with a sampling valve 12. And a discharge valve 13 is arranged on the discharge pipeline 20.
The above technical solutions combine production practices specifically (and may be accompanied by some technical improvements): the low-temperature sample concentration device comprises an evaporation tank 1, a condensation tank 2 and a negative pressure suction pipeline 17. A TEC thermoelectric cooling plate (a semiconductor refrigerator) is attached to the outer wall of the evaporation tank 1 for heating, and a PTC constant temperature heating plate 15 is arranged at the bottom of the evaporation tank 1. The bottom in the evaporating pot 1 is provided with a temperature sensor 8, and the top of the evaporating pot 1 is connected with a sample water inlet pipeline 18 and a steam pipeline 5. The outer wall of the condensing tank 2 is pasted with the TEC thermoelectric refrigerating sheet corresponding to the evaporating tank 1 for refrigerating. Specifically, the hot end and the cold end of the TEC thermoelectric refrigeration sheet are respectively and correspondingly attached to the heat conduction surface of the evaporation tank 1 and the cold conduction surface of the condensation tank 2, that is, the TEC thermoelectric refrigeration sheet is fixedly arranged between the evaporation tank 1 and the condensation tank 2. The TEC thermoelectric cooling plate is connected with a TEC controller 3, and the TEC controller 3 is connected with the PLC 16. An analog quantity liquid level meter 9 is arranged at the bottom in the condensing tank 2, and an exhaust valve 11 and a steam pipeline 5 are connected to the top of the condensing tank 2. The outer wall surface of the evaporating pot 1 and the outer wall surface of the steam pipeline 5 between the condensing pot 2 and the evaporating pot 1 are coated with a layer of heat-insulating layer 4. Therefore, the bottom of the evaporation tank 1 is connected with a concentrated sample sampling pipeline 19, and the concentrated sample sampling pipeline 19 is also provided with a sampling valve 12. The bottom of the condensing tank 2 is connected with a discharge pipeline 20, and the discharge pipeline 20 is also provided with a discharge valve 13.
The vacuum pump 7 arranged on the negative pressure suction pipeline 17 pumps out the atmosphere in the low-temperature sample concentration device, and the vacuum pump 7 stops after the negative pressure meter 6 detects that the pressure value reaches-98 kpa. Pouring the sample water into the water inlet valve 10 (the water inlet valve 10 is not opened), then opening the valve and adding the sample water while pouring, and no air can enter. The TEC thermoelectric refrigerating sheets on the outer wall of the evaporating pot 1 start to heat, the PTC constant-temperature heating sheets 15 at the bottom of the evaporating pot 1 heat, and the TEC thermoelectric refrigerating sheets on the outer wall of the condensing pot 2 start to refrigerate at the same time. Because the pressure in the whole device is-98 kpa, the boiling point of sample water is reduced, and low-temperature evaporation is realized; the temperature sensor 8 records the numerical value of the sample water temperature in the tank in real time, steam generated after water is boiled enters the condensing tank 2 through the steam pipeline 5, and the steam is pre-cooled and condensed in the condensing tank 2. After the analog quantity liquid level meter 9 is reached, the PLC16 (programmable controller) controls the TEC thermoelectric refrigerating sheet and the PTC constant temperature heating sheet 15 to stop working, the indicator light is turned on after the working is finished, the exhaust valve 11 is opened, concentrated sample water is discharged from the concentrated sample sampling pipeline 19 at the bottom of the evaporation tank 1, and condensed water is discharged from the discharge pipeline 20 at the bottom of the condensation tank 2.
The working principle of the low-temperature sample concentration device is as follows: when the pressure in the whole device reaches-98 kpa, pouring sample water (such as 2L) into the evaporation tank 1, starting heating in the tank, generating steam, entering the condensation tank 2, and pre-cooling and condensing the steam; and after the liquid level is reached, discharging the concentrated sample water and the condensed water. The heat energy absorbed by the low-temperature evaporation and concentration of the sample water comes from the TEC thermoelectric refrigerating sheet and the PTC constant-temperature heating sheet 15, and the evaporated water vapor rises to enter the vapor pipeline 5 and then enters the condensing tank 2 to be liquefied. The vacuum pump 7 is used for pumping out the atmosphere in the whole device, so that the generation of non-condensable gas during condensation is reduced, and the purpose is to improve the sample water evaporation efficiency and the steam condensation efficiency. The evaporation tank 1, the steam pipeline 5 and the condensing tank 2 are covered with the heat-insulating layer 4, so that the evaporation tank 1 and the condensing tank 2 are not influenced by the external environment temperature, and the working efficiency of the device is ensured; the concentration efficiency can be prevented from being reduced because the evaporated water vapor is condensed on the wall surface of the evaporation tank 1 and then reflows to the sample water.
Fig. 2 is an electrical schematic diagram of the low-temperature sample concentrating device, wherein the names corresponding to the part numbers are as follows.
| Numbering | Name (R) |
| TC | Temperature controller |
| HEA | Heating device |
| VPM | Vacuum pump |
| VF | Negative pressure gauge |
| SL | Analog quantity liquid level meter |
| PLC | Programmable controller |
| QF-1 | Switch with a switch body |
| P1 | Switching power supply |
| KA1-KA3 | Intermediate relay |
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
1. A low-temperature sample concentration device comprises an evaporation tank, a sample water inlet pipeline connected to the evaporation tank, a condensation tank and a negative pressure suction pipeline connected to the condensation tank; the sample water inlet pipeline is communicated with the negative pressure suction pipeline; the device is characterized in that the bottom of the evaporation tank is connected with a concentrated sample sampling pipeline, and the bottom of the condensation tank is connected with a discharge pipeline; and a semiconductor refrigerator for heating the evaporating tank and refrigerating the condensing tank is arranged between the evaporating tank and the condensing tank.
2. The apparatus for concentrating a low-temperature sample according to claim 1, wherein a PTC constant-temperature heating plate is provided on the bottom of the evaporation tank.
3. The cryogenic sample concentrating device of claim 1, wherein the sample water inlet line is in communication with the negative pressure suction line via a steam line.
4. A cryogenic sample concentrating device according to claim 1 or 3, wherein the sample water inlet line is connected to a water inlet valve.
5. A cryogenic sample concentrating device according to claim 1 or 3, wherein a vacuum pump, a negative pressure gauge and an exhaust valve are connected to the negative pressure suction line.
6. The cryogenic sample concentrating device of claim 1, wherein a sample valve is provided on the concentrated sample sampling line.
7. The cryogenic sample concentrating device of claim 1, wherein the vent line is provided with a vent valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023082176.6U CN216222954U (en) | 2020-12-18 | 2020-12-18 | Low temperature sample enrichment facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023082176.6U CN216222954U (en) | 2020-12-18 | 2020-12-18 | Low temperature sample enrichment facility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216222954U true CN216222954U (en) | 2022-04-08 |
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ID=80938586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023082176.6U Active CN216222954U (en) | 2020-12-18 | 2020-12-18 | Low temperature sample enrichment facility |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216222954U (en) |
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2020
- 2020-12-18 CN CN202023082176.6U patent/CN216222954U/en active Active
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