CN202304938U - Measuring device of high-temperature viscous material liquid level for negative pressure system - Google Patents
Measuring device of high-temperature viscous material liquid level for negative pressure system Download PDFInfo
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- CN202304938U CN202304938U CN2011203282270U CN201120328227U CN202304938U CN 202304938 U CN202304938 U CN 202304938U CN 2011203282270 U CN2011203282270 U CN 2011203282270U CN 201120328227 U CN201120328227 U CN 201120328227U CN 202304938 U CN202304938 U CN 202304938U
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- liquid level
- single flange
- level transmitter
- fluid level
- transmitter
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Abstract
The utility model discloses a measuring device of high-temperature viscous material liquid level for a negative pressure system, which is characterized by including a single flange liquid level transmitter I (1) and a single flange liquid level transmitter II (2), wherein the single flange liquid level transmitter I (1) and the single flange liquid level transmitter II (2) are mounted at the vertically opposite positions of the side surface of a pressure reducing tower kettle; and the mounting distance between the single flange liquid level transmitter I (1) and the single flange liquid level transmitter II (2) is the liquid level measurement range of the to-be-measured high-temperature viscous material. By utilizing the two single flange liquid level transmitters in a matched way, the pressure exerted on the pressure reducing tower in the negative system is removed, so that the system is free from the influence of the negative pressure; as long as the pressure exerted on the two single flange liquid level transmitters is calculated, the liquid level of the to-be-measured material is obtained; the measuring result is precise; and the single flange liquid level transmitter has a simple structure, is convenient to maintain, reduces the production cost, and improves the working efficiency.
Description
Technical field
The utility model relates to the petrochemical technology field, is a kind of measurement mechanism of negative pressure system high temperature sticky material liquid level specifically.
Background technology
Especially in the extractive process of asphaltic products, major part is materials such as the higher pitch of viscosity, carbolineum, naphthalene in decompression Tata still material in petrochemical complex and Coal Chemical Industry.In negative pressure system, adopt electric float level meter or two flange fluid level transmitter to measure the liquid level of material in decompression (negative pressure) system at present usually.But, because the softening point and the solidifying point of pitch is all higher, must remain under the condition of high temperature, meet and coldly very easily solidify, and lasting heating can make asphalt coking.And temperature under vacuum state, is difficult to guarantee the stability of vacuum at 310 ~ 350 ℃ in the actual production process in the vacuum distillation tower negative pressure system.The measuring method that generally adopts at present is that electricity consumption float level meter or two flange fluid level transmitter are measured.
The electricity float level meter is to utilize to become law of buoyancy, makes and produces moment on the lever, and through the anti-twisting force variation of torque tube, thereby the measuring liquid level variation.Its mounting means has two kinds, and a kind of is interior float-type, and a kind of is outer float-type.Interior float-type is at device interior, and floating drum is fragile can't be changed; The asphalt solidification that makes easily of outer float-type stops up, and upper end pressure place receives the vacuum variable effect to make the float buoyancy measure of the change not accurate enough.The floating drum measurement has static material inner at floating drum, for a long time may crystallization and freezing, and possibly cause high-temperature coking with electrically heat tracing means heating, and the cost input is huge.
The measurement instrument of the another kind of closed container sticky material liquid level of using always is two flange fluid level transmitters; Because technical limitation; Can accomplish that high temperature and the measuring diaphragm level gauging instrument produced worldwide producer under negative pressure state is very few; And two flange fluid level transmitters receive the influence of fluctuations of suction side vacuum tightness to be difficult to accurate the measurement, tend to bring great hidden because the inaccurate appearance decompression Tata still of measuring is found time and the situation of flooding to production; And the two flange fluid level transmitter prices of this kind are very expensive, and fabrication cycle is also very long.
Summary of the invention
For solving the technical matters of above-mentioned existence, the utility model provides a kind of measurement mechanism of negative pressure system high temperature sticky material liquid level, and measurement result is accurate, and is easy to maintenance.
For achieving the above object, the technical scheme that the utility model adopts is following:
The measurement mechanism of negative pressure system high temperature sticky material liquid level; Include single flange fluid level transmitter I and single flange fluid level transmitter II; Said single flange fluid level transmitter I and single flange fluid level transmitter II are installed on the up and down vertical opposite position, side of decompression Tata still, and the mounting distance between said single flange fluid level transmitter I and the single flange fluid level transmitter II is a liquid level range of treating the pyrometry sticky material.
The utility model adopts two single flange fluid level transmitters to be used, thereby the pressure that vacuum distillation tower in the negative pressure system is suffered eliminates, and makes system not receive the influence of negative pressure; Only need two suffered pressure of single flange fluid level transmitter are done computing; Can obtain the liquid level of material to be measured, measurement result is accurate, and single flange liquid level meter is simple in structure, easy to maintenance; Reduce production cost, improved work efficiency.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is described in detail:
Shown in accompanying drawing 1; The utility model includes single flange fluid level transmitter I 1 and single flange fluid level transmitter II 2; Said single flange fluid level transmitter I 1 and single flange fluid level transmitter II 2 are installed on the up and down vertical opposite position, side of decompression Tata still 3, and the mounting distance between said single flange fluid level transmitter I 1 and the single flange fluid level transmitter II 2 is a liquid level range of treating the pyrometry sticky material.
In the actual installation process, respectively open the measuring port of a diameter 80mm in the decompression Tata still 3 up and down vertical opposite positions that needs are measured, the distance between the upper and lower opening is the liquid level range of treating the pyrometry sticky material.Welding straight length 120mm on measuring port, the length of straight length is moderate, oversize material easy and crystalline, it is too high to have lacked very much temperature of charge, influential serviceable life to single flange fluid level transmitter.Respectively weld single flange fluid level transmitter I 1 and single flange fluid level transmitter II 2 behind the upper and lower opening welding straight length, the pressure that transmitter is measured carries out following calculation process, can obtain the level value of material to be measured.
The pressure of measuring with single flange fluid level transmitter II 2 deducts pressure differential that the pressure of single flange fluid level transmitter list flange fluid level transmitter I 1 obtains and is and treats the suffered static pressure of pyrometry sticky material liquid level; The suffered negative pressure in Tata still 3 tops wherein reduces pressure; The process of subtracting each other at two pressure eliminates, and promptly system no longer receives the influence of negative pressure.Pass through formula: P=ρ gh derives
P
Down---the pressure that single flange fluid level transmitter II 2 is measured, the Pa of unit
P
On---the pressure that single flange fluid level transmitter I 1 is measured, the Pa of unit
ρ---treat the density of pyrometry sticky material
G---treat the acceleration of gravity that the pyrometry sticky material is suffered
Analysis has two kinds of situation to take place.
First kind of situation, liquid level are higher than single flange fluid level transmitter I 1 position.
P is last=and P1+ P is true
Under the P=P2+ P is true
Promptly this moment, system's liquid level exceeded the liquid level gauge range, and system is flooding.
Second kind of situation, liquid level are lower than single flange fluid level transmitter I 1 position, are higher than single flange fluid level transmitter II 2 positions, and this also is the normal run time behaviour of system.
P is last=and P is true
Under the P=P2+ P is true
The height h of liquid level can measure.
Claims (1)
1. the measurement mechanism of a negative pressure system high temperature sticky material liquid level; It is characterized in that; Include single flange fluid level transmitter I (1) and single flange fluid level transmitter II (2); Said single flange fluid level transmitter I (1) and single flange fluid level transmitter II (2) are installed on the up and down vertical opposite position, side of decompression Tata still (3), and the mounting distance between said single flange fluid level transmitter I (1) and the single flange fluid level transmitter II (2) is a liquid level range of treating the pyrometry sticky material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203282270U CN202304938U (en) | 2011-09-03 | 2011-09-03 | Measuring device of high-temperature viscous material liquid level for negative pressure system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203282270U CN202304938U (en) | 2011-09-03 | 2011-09-03 | Measuring device of high-temperature viscous material liquid level for negative pressure system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202304938U true CN202304938U (en) | 2012-07-04 |
Family
ID=46373815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203282270U Expired - Lifetime CN202304938U (en) | 2011-09-03 | 2011-09-03 | Measuring device of high-temperature viscous material liquid level for negative pressure system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202304938U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113670406A (en) * | 2021-10-24 | 2021-11-19 | 胜利油田东强机电设备制造有限公司 | Liquid level transmitter capable of preventing probe from being blocked |
-
2011
- 2011-09-03 CN CN2011203282270U patent/CN202304938U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113670406A (en) * | 2021-10-24 | 2021-11-19 | 胜利油田东强机电设备制造有限公司 | Liquid level transmitter capable of preventing probe from being blocked |
| CN113670406B (en) * | 2021-10-24 | 2022-01-28 | 胜利油田东强机电设备制造有限公司 | Liquid level transmitter capable of preventing probe from being blocked |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |