CN203447792U - Device for measuring liquid level of evaporator - Google Patents
Device for measuring liquid level of evaporator Download PDFInfo
- Publication number
- CN203447792U CN203447792U CN201320545080.XU CN201320545080U CN203447792U CN 203447792 U CN203447792 U CN 203447792U CN 201320545080 U CN201320545080 U CN 201320545080U CN 203447792 U CN203447792 U CN 203447792U
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- Prior art keywords
- liquid level
- drainage tube
- evaporimeter
- limit
- material fully
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Abstract
The utility model discloses a device for measuring the liquid level of an evaporator. The device comprises the evaporator containing liquid; the side of the evaporator is connected with one opening of an upper limit liquid level drainage tube and one opening of a lower limit liquid level drainage tube, and the other openings of the upper and lower limit liquid level drainage tubes are respectively connected with a flange; the flanges are respectively connected with a liquid level limit valve by a connecting pipe; the liquid level limit valves are connected with a closed material box by the connecting pipes; the lower end of the closed material box is provided with a drain outlet which is connected with a sewage drainage tube with a blow-down valve; the upper end of the closed material box is provided with an inserting hole; a rod type capacitive liquid level gauge is inserted into the inserting hole; the rod type capacitive liquid level gauge is connected with a liquid level transmitter. The device is high in measurement accuracy, has a good negative pressure resistance effect, is not easily crystallized and blocked by sewage, and is simple to install and convenient to maintain.
Description
Technical field
The utility model relates to a kind of measurement mechanism, especially relates to a kind of evaporimeter liquid level emasuring device.
Background technology
Pretreatment is simple, operating temperature is low, heat transfer efficiency is high, power consumption is little owing to having for the low-temperature multi-effect/distillation seawater desalination technology of calming the anger, produce the good and security of operation of water water quality the feature such as stablizes, and has become one of desalination technology most with prospects.Evaporimeter, as the large-scale key equipment of the low-temperature multi-effect/distillation seawater desalination of calming the anger, need to carry out continuous measurement and monitoring in real time to process variables such as its liquid level, pressure, temperature, flows.Wherein evaporimeter liquid level parameter is particularly important, and the PID that its measurement result is participated in control system directly regulates and interlock protection, significant to automaticity and the safety and economic operation of raising unit.
Evaporimeter moves in the operating modes such as low temperature, negative pressure, deep-etching, easy crystallization and vapour-liquid two-phase mixed flow, in instrument selection, should be specifically noted that vacuum-resistant, the corrosion resistance of sensor, and the measure error problem causing due to factors such as steam-condensation, diaphragm crystallization, bridging; Evaporimeter internal structure is complicated, and level gauging scope is only equivalent to 1/8～1/6 of evaporimeter height, and error does not allow surpass ± 10mm.The too high heat transfer efficiency that affects of liquid level, too low spray flux deficiency or the water pump of easily causing of liquid level damages.Amid all these factors, several conventional level measuring methods have been carried out finding after screening: the measure error minimum of magnetic flap level gauge is ± 10mm; Differential pressure transmitter is had relatively high expectations to the installation of impulse pipeline, regular maintenance etc.; The mounting flange minimum diameter of teletransmission flange differential pressure transmitter is DN80, and capillary is subject to externally temperature influence larger, and conventional diaphragm can not be worked for a long time in negative pressure state; Radar level gauge existence measurement blind area and price are higher.Therefore be badly in need of exploitation and there is the evaporimeter liquid level emasuring device compared with high precision and stability.
Utility model content
The purpose of this utility model is the above-mentioned deficiency of the prior art of customer service, provide high, the resistance to negative pressure of a kind of certainty of measurement effective, be difficult for crystallization, be difficult for dirt and block up, install small-sized low-temperature multi-effect evaporimeter liquid level emasuring device simple, easy to maintenance and that cost performance is higher.
The purpose of this utility model is achieved by following technical proposals: a kind of evaporimeter liquid level emasuring device, comprise the evaporimeter that contains liquid, the sidepiece of described evaporimeter is connected with respectively upper limit liquid level drainage tube port and bottom limit level drainage tube port, the another port of described upper limit liquid level drainage tube and bottom limit level drainage tube is connected with respectively flange, described flange is connected with limit liquid level valve by tube connector, described limit liquid level valve is connected with material fully sheathed case by tube connector, the lower end of described material fully sheathed case is provided with sewage draining exit, described sewage draining exit is connected with the blowdown drainage tube with blowoff valve, the upper end of described material fully sheathed case is provided with jack, in described jack, be inserted with rod-type capacitance liquid level meter, described rod-type capacitance liquid level meter is connected with fluid level transmitter.
The degree of depth that described rod-type capacitance liquid level meter inserts material fully sheathed case is greater than evaporimeter level gauging scope, and its computational methods are: L=100mm+300mm, and described L is insertion depth, and described 100mm is effective screen layer, and described 300mm is actual measurement range.
The beneficial effects of the utility model are:
One. when small-sized low-temperature multi-effect by evaporimeter level gauging scope hour, improved liquid level measurement precision, deviation be less than actual measured value ± 1mm.
Two. evaporimeter adopts flange to be connected with liquid level emasuring device, has ensured the air-tightness of evaporimeter, and has been convenient to installation and maintenance.
Three. the utility model is applicable to 30t/d low-temperature multiple-effect seawater desalination pilot-plant, its measurement data is compared with glass tube liquid level show value with there being technology, be no more than ± 1mm of both errors, meets low-temperature multiple-effect seawater desalination evaporator level gauging completely and controls requirement.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Reference numeral: 1 evaporimeter 2 upper limit liquid level drainage tube 3 bottom limit level drainage tubes
4 flange 5 tube connector 6 limit liquid level valve 7 material fully sheathed cases
8 blowoff valve 9 blowdown drainage tubes, 10 rod-type capacitance liquid level meter 11 fluid level transmitters
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described:
As shown in Figure 1, a kind of evaporimeter liquid level emasuring device, comprise the evaporimeter 1 that contains liquid, the sidepiece of described evaporimeter 1 is connected with respectively upper limit liquid level drainage tube 2 ports and bottom limit level drainage tube 3 ports, the another port of described upper limit liquid level drainage tube and bottom limit level drainage tube is connected with respectively flange 4, described flange 4 is connected with limit liquid level valve 6 by tube connector 5, described limit liquid level valve 6 is connected with material fully sheathed case 7 by tube connector 5, the lower end of described material fully sheathed case 7 is provided with sewage draining exit, described sewage draining exit is connected with the blowdown drainage tube 9 with blowoff valve 8, the upper end of described material fully sheathed case 7 is provided with jack, in described jack, be inserted with rod-type capacitance liquid level meter 10, described rod-type capacitance liquid level meter 10 is connected with fluid level transmitter 11.The degree of depth that described rod-type capacitance liquid level meter 10 inserts material fully sheathed case 7 is greater than evaporimeter level gauging scope, its computational methods are: L=100mm+300mm, described L: be insertion depth, described 100mm: be effective screen layer, described 300mm: be actual measurement range.
The utility model in installation process, guarantee capacitance level gauge electrode bottom and reach the standard grade liquid level flange center line at same level line, and leaving certain distance with material fully sheathed case bottom.
Before the work of the utility model device, first to open blowoff valve, the solution of material fully sheathed case is emptying, and the air of take is done to initialize to capacitance as medium and is demarcated, and the value of correspondence 0% or 4mA is set.Then add detected solution to highest order measurement point, capacitance is now set as to 100% or value corresponding to 20mA, finally corresponding capacitance is input in fluid level transmitter as 0% and 100% respectively.
Claims (2)
1. an evaporimeter liquid level emasuring device, comprise the evaporimeter that contains liquid, it is characterized in that, the sidepiece of described evaporimeter is connected with respectively upper limit liquid level drainage tube port and bottom limit level drainage tube port, the another port of described upper limit liquid level drainage tube and bottom limit level drainage tube is connected with respectively flange, described flange is connected with limit liquid level valve by tube connector, described limit liquid level valve is connected with material fully sheathed case by tube connector, the lower end of described material fully sheathed case is provided with sewage draining exit, described sewage draining exit is connected with the blowdown drainage tube with blowoff valve, the upper end of described material fully sheathed case is provided with jack, in described jack, be inserted with rod-type capacitance liquid level meter, described rod-type capacitance liquid level meter is connected with fluid level transmitter.
2. a kind of evaporimeter liquid level emasuring device according to claim 1, it is characterized in that, the degree of depth that described rod-type capacitance liquid level meter inserts material fully sheathed case is greater than evaporimeter level gauging scope, its computational methods are: L=100mm+300mm, wherein L is insertion depth, described 100mm is effective screen layer, and described 300mm is actual measurement range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320545080.XU CN203447792U (en) | 2013-09-03 | 2013-09-03 | Device for measuring liquid level of evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320545080.XU CN203447792U (en) | 2013-09-03 | 2013-09-03 | Device for measuring liquid level of evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203447792U true CN203447792U (en) | 2014-02-26 |
Family
ID=50127697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320545080.XU Expired - Fee Related CN203447792U (en) | 2013-09-03 | 2013-09-03 | Device for measuring liquid level of evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203447792U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106855426A (en) * | 2015-12-09 | 2017-06-16 | 中核四○四有限公司 | Evaporator liquid level auxiliary monitoring system and method is put in one kind |
| CN107255499A (en) * | 2017-06-15 | 2017-10-17 | 甘肃蓝科石化高新装备股份有限公司 | Multi-effect evaporation system evaporative capacity measuring apparatus and measuring method |
| CN107702749A (en) * | 2017-10-16 | 2018-02-16 | 中国核动力研究设计院 | A kind of liquid waste evaporator multiparameter measuring device and measuring method |
-
2013
- 2013-09-03 CN CN201320545080.XU patent/CN203447792U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106855426A (en) * | 2015-12-09 | 2017-06-16 | 中核四○四有限公司 | Evaporator liquid level auxiliary monitoring system and method is put in one kind |
| CN107255499A (en) * | 2017-06-15 | 2017-10-17 | 甘肃蓝科石化高新装备股份有限公司 | Multi-effect evaporation system evaporative capacity measuring apparatus and measuring method |
| CN107702749A (en) * | 2017-10-16 | 2018-02-16 | 中国核动力研究设计院 | A kind of liquid waste evaporator multiparameter measuring device and measuring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140226 Termination date: 20180903 |