CN201748154U - Large gasifier liquid-level control system - Google Patents
Large gasifier liquid-level control system Download PDFInfo
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- CN201748154U CN201748154U CN2010203017340U CN201020301734U CN201748154U CN 201748154 U CN201748154 U CN 201748154U CN 2010203017340 U CN2010203017340 U CN 2010203017340U CN 201020301734 U CN201020301734 U CN 201020301734U CN 201748154 U CN201748154 U CN 201748154U
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Abstract
The utility model relates to a large gasifier liquid-level control system. A liquefied gas-liquid phase tube enters into a gasifier through an inlet flange ball valve, a filter, a liquefied gas control valve and an outlet flange ball valve in turn; an output tube of the gasifier outputs the gaseous liquefied gas through a flange cut-off valve. a single circuit closed-loop negative feedback fixed value control system of liquefied gas-liquid level controls the liquefied gas-liquid level in the gasifier and the system is suitable for pressure and flow fluctuation of various loads and timely controls the liquefied gas volume in the gasifier and the liquefied gas-liquid level in the gasifier is controlled in the required range. The interlocking control function of the gasifier at relative low gas-phase temperature and over high liquefied gas-liquid level is intruded into the system, if only low-limit alarm of the liquefied gas-phase temperature occurs, the high-limit alarm of the liquefied gas-liquid level automatically closes a liquefied gas adjustment valve by a solenoid valve mounted on a gas path arranged between a valve positioner on the liquefied gas adjustment valve and a pneumatic actuator, so as to prevent liquid through and ensure safe and reliable operation of the gasifier.
Description
Technical field
The utility model belongs to chemical machinery, particularly a kind of large-scale vaporizer tank level control system.
Background technique
Liquefied gas gassifier air supply system in the industrial production, because the variation of user's gas consumption and other factors cause the change of the flow of air supply system output, can cause very big influence to industrial production, even can be because the control of vaporizer amount of vaporization imbalance, liquid or liquid gas gas phase temperature occurred and crossed low and influence is produced or caused the accident.Therefore large-scale vaporizer tank level control system is had higher requirement.General control system is owing to the restriction of structure and principle, and the control accuracy of amount of vaporization is relatively poor, and also very poor to the adaptability of fluctuation of load.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of large-scale vaporizer tank level control system is provided.
The technical solution of the utility model is:
A kind of large-scale vaporizer tank level control system, it is characterized in that: the liquid gas liquid-phase tube connects filter, filter connection liquid gas modulating valve LV, liquid gas modulating valve LV connection outlet(discharge) flange ball valve through the suction flange ball valve, and the outlet(discharge) flange ball valve connects large-scale vaporizer; The liquid gas liquid-phase tube is connected to the bypass of outlet(discharge) flange ball valve rear end as the liquid gas liquid-phase tube through suction flange ball valve front end through the bypass Flange Globe Valves; Large-scale vaporizer output tube connects gaseous liquefied gas output tube through Flange Globe Valves;
The level meter LT101 that is arranged on the large-scale vaporizer connects fluid level controller LICA101, and fluid level controller LICA101 connects valve positioner LY, and valve positioner LY connects solenoid valve SV, and solenoid valve SV connects liquid gas modulating valve LV through pneumatic actuator; Instrument air connects valve positioner LY through ball valve;
The gas phase temperature transmitter TT102 that is arranged on the large-scale vaporizer connects gas phase temperature controlling instrument TIA102, and gas phase temperature controlling instrument TIA102 connects interlock control system, and fluid level controller LICA101 connects interlock control system, and interlock control system connects solenoid valve SV;
Large-scale vaporizer is provided with thermometer T1, following thermometer T2 and pressure meter P3; Connecting pipeline is provided with pressure meter P1, P2, P4 and pressure transducer PT101, PT102; Pressure transducer PT101, PT102 connect pressure-display instrument PI101, PI102 respectively.
Its control system is connected to: the liquid gas liquid level object L101 in the large-scale vaporizer of main object connects level meter LT101, level meter LT101 output feedback connects fluid level controller LICA101 and measures input end, fluid level controller LICA101 output connects valve positioner LY, instrument air cut-in valve door holder LY, valve positioner LY connects solenoid valve SV, solenoid valve SV connects liquid gas modulating valve LV, and liquid gas modulating valve LV output connects liquid gas liquid level object L101; Liquid gas gas phase temperature object T102 in the large-scale vaporizer of main object connects gas phase temperature transmitter TT102, gas phase temperature transmitter TT102 connects gas phase temperature controlling instrument TIA102, gas phase temperature controlling instrument TIA102 output connects interlock control system, fluid level controller LICA101 output connects interlock control system, and interlock control system output connects solenoid valve SV.
The utility model effect is:
The large-scale vaporizer tank level control system of the utility model is a kind of large-scale vaporizer tank level control system of liquid level definite value control.Liquid lng enters vaporizer by the liquid gas modulating valve according to the needs of gas consumption, makes the amount of vaporization of vaporizer meet customer requirements, and output adapts to the gaseous liquefied gas of load variations.Because its unique control principle and structure adapt to the pressure of various loads, the fluctuation of flow, according to the variation of user's use amount, control liquid gas feed liquor amount in the vaporizer in time, and liquid gas liquid level in the vaporizer is controlled in the scope of requirement.Introduce the liquid gas gas phase temperature in this system and crossed low and the too high interlocked control function of liquid gas liquid level, then close the liquid gas modulating valve automatically as long as occur promptly that liquid gas gas phase temperature lower bound is reported to the police, the high limit of liquid gas liquid level is reported to the police by being installed on the liquid gas modulating valve valve positioner to the solenoid valve on the gas circuit between the pneumatic actuator, in case the liquid phenomenon occurred, guarantee large-scale vaporizer safe and reliable operation.
Large-scale vaporizer tank level control system advantage and effect:
(1) on system architecture, this control system is controlled the liquid gas liquid level with a single-circuit close loop negative feedback fixed set point control system, so the gas consumption that feedback load fluctuation in time causes changes, automatically control enters the amount of the liquid gas of vaporizer, make the liquid level that is maintained fixed in the vaporizer, to adapt to the needs of various loads.
(2) on system architecture, this control system has a cover interlock control system, liquid gas gas phase temperature lower bound is reported to the police, the high limit of liquid gas liquid level is reported to the police then closes the liquid gas modulating valve automatically by valve positioner to the solenoid valve on the gas circuit between the pneumatic actuator that is installed on the liquid gas modulating valve as long as promptly occur, in case the liquid phenomenon occurred, guarantee large-scale vaporizer safe and reliable operation.
Description of drawings
Fig. 1 is large-scale vaporizer tank level control system process pipe and control flow chart,
Fig. 2 is large-scale vaporizer tank level control system Block Diagram,
Fig. 3 is an interlock control system.
Among the figure: 1. Flange Ball Valves, 2 filters, 3 Flange Globe Valvess, 4 large-scale vaporizers, 5 interlock control systems, SV solenoid valve, the LY valve positioner, LV liquid gas modulating valve, T1 ~ T2 thermometer, P1 ~ P4 pressure meter, PT101 ~ PT102 pressure transducer, TT102 gas phase temperature transmitter, level meter LT101, TIA102 phase temperature controlling instrument, PI101 ~ PI102 pressure-display instrument, LICA101 fluid level controller, RT fus, D1 gas phase temperature lower bound tutorial light, the high limit of D2 liquid level tutorial light, D3 solenoid valve work indicator light, KA1-KA3 relay, PB ann silence button, the BZ alarm buzzer.
Embodiment
A kind of large-scale vaporizer tank level control system as shown in Figure 1, the liquid gas liquid-phase tube connects filter 2, filter connection LV liquid gas modulating valve, LV liquid gas modulating valve connection outlet(discharge) flange ball valve through suction flange ball valve 1, and the outlet(discharge) flange ball valve connects large-scale vaporizer 4; The liquid gas liquid-phase tube is connected to the bypass of outlet(discharge) flange ball valve rear end as the liquid gas liquid-phase tube through suction flange ball valve front end through bypass Flange Globe Valves 3; The vaporizer output tube connects gaseous liquefied gas output tube through Flange Globe Valves;
The LT101 level meter connects the LICA101 fluid level controller, and the LICA101 fluid level controller connects the LY valve positioner, and the LY valve positioner connects the SV solenoid valve, and the SV solenoid valve connects LV liquid gas modulating valve through pneumatic actuator; Instrument air connects the LY valve positioner through ball valve;
TT102 gas phase temperature transmitter connects TIA102 gas phase temperature controlling instrument, and TIA102 gas phase temperature controlling instrument connects interlock control system 5, and the LICA101 fluid level controller connects interlock control system 5, and interlock control system 5 connects the SV solenoid valve;
Large-scale vaporizer is provided with T1 ~ T2 thermometer and pressure meter P3, and pipeline is provided with P1, P2, P4 pressure meter, and PT101 ~ PT102 pressure transducer, PT101 ~ PT102 pressure transducer connect PI101 ~ PI102 pressure-display instrument respectively.
Its control system as shown in Figure 2 is connected to: the liquid gas liquid level object L101 in the large-scale vaporizer of main object connects level meter LT101, level meter LT101 output feedback connects fluid level controller LICA101 and measures input end, fluid level controller LICA101 output connects valve positioner LY, instrument air cut-in valve door holder LY, valve positioner LY connects solenoid valve SV, solenoid valve connects liquid gas modulating valve LV, and liquid gas modulating valve LV output connects liquid gas liquid level object L101; Liquid gas gas phase temperature object T102 in the large-scale vaporizer of main object connects gas phase temperature transmitter TT102, gas phase temperature transmitter TT102 connects gas phase temperature controlling instrument TIA102, gas phase temperature controlling instrument TIA102 output connects interlock control system, fluid level controller LICA101 output connects interlock control system, and interlock control system output connects solenoid valve SV.
Its large-scale vaporizer tank level control system:
Large-scale vaporizer tank level control system can be realized needing accurate control to enter the amount of the liquid gas of vaporizer according to the user, keeps certain liquid level, to reach the purpose that output adapts to the gaseous liquefied gas of different load requirement.
(1) single loop control system of liquid gas liquid level: the liquid gas tank level control system is a single-circuit close loop negative feedback fixed set point control system, realizes the definite value of the liquid gas liquid level in the vaporizer is regulated.Detect the measured value of the currency of liquid gas liquid level as fluid level controller LICA101 by level meter LT101, fluid level controller LICA101 compares this measured value and liquid gas liquid level setting value and obtains the liquid level deviation, and this deviation is carried out after P, I, the D computing output 4-20mA control signal deliver to the liquid gas modulating valve LV that is positioned on the vaporizer liquid phase pipeline, thereby its aperture is changed what of amount that control enters the liquid gas of vaporizer are realized regulating automatically continuously the liquid gas liquid level.
(2) large-scale vaporizer is reported to the police and safety interlocking: referring to accompanying drawing 3 interlock control systems.
Because large-scale vaporizer gas phase temperature is crossed low and the liquid gas liquid level is too high, all the liquid phenomenon may appear, and can influence the vaporizer safe and reliable operation, and user's production is impacted.Therefore, in control system, introduced interlock control system.
On large-scale vaporizer, be provided with liquid gas gas phase temperature transmitter TT102 and liquid gas level meter LT, on gas phase temperature controlling instrument TIA102, set temperature lower bound alarm point accordingly, on fluid level controller LICA101, set the high limit of liquid level alarm point, when liquid gas gas phase temperature lower bound, liquid gas liquid level height taking place in limited time, promptly send acoustooptic alarm, cut off the power supply of solenoid valve SV simultaneously, valve positioner LY is cut off to the instrument air between the pneumatic actuator, liquid gas modulating valve LV is closed fully, guarantee safety.Get rid of when fault, when overload alarm was removed, solenoid valve SV restored electricity, and liquid gas modulating valve LV can enter normal state of a control again.
Claims (2)
1. one kind large-scale vaporizer tank level control system, it is characterized in that: the liquid gas liquid-phase tube connects filter, filter connection liquid gas modulating valve (LV), liquid gas modulating valve (LV) connection outlet(discharge) flange ball valve through the suction flange ball valve, and the outlet(discharge) flange ball valve connects large-scale vaporizer; The liquid gas liquid-phase tube is connected to the bypass of outlet(discharge) flange ball valve rear end as the liquid gas liquid-phase tube through suction flange ball valve front end through the bypass Flange Globe Valves; Large-scale vaporizer output tube connects gaseous liquefied gas output tube through Flange Globe Valves;
The level meter (LT101) that is arranged on the large-scale vaporizer connects fluid level controller (LICA101), fluid level controller (LICA101) connects valve positioner (LY), valve positioner (LY) connects solenoid valve (SV), and solenoid valve (SV) connects liquid gas modulating valve (LV) through pneumatic actuator; Instrument air connects valve positioner (LY) through ball valve;
The gas phase temperature transmitter (TT102) that is arranged on the large-scale vaporizer connects gas phase temperature controlling instrument (TIA102), gas phase temperature controlling instrument (TIA102) connects interlock control system, fluid level controller (LICA101) connects interlock control system, and interlock control system connects solenoid valve (SV);
Large-scale vaporizer is provided with thermometer (T1), following thermometer (T2) and pressure meter (P3); Connecting pipeline is provided with pressure meter (P1, P2, P4) and pressure transducer (PT101, PT102); Pressure transducer (PT101, PT102) connects pressure-display instrument (PI101, PI102) respectively.
2. large-scale vaporizer tank level control system according to claim 1, it is characterized in that: its control system is connected to: the liquid gas liquid level object (L101) in the large-scale vaporizer of main object connects level meter (LT101), level meter (LT101) output feedback connects fluid level controller (LICA101) and measures input end, fluid level controller (LICA101) output connects valve positioner (LY), instrument air cut-in valve door holder (LY), valve positioner (LY) connects solenoid valve (SV), solenoid valve (SV) connects liquid gas modulating valve (LV), and liquid gas modulating valve (LV) output connects liquid gas liquid level object (L101); Liquid gas gas phase temperature object (T102) in the large-scale vaporizer of main object connects gas phase temperature transmitter (TT102), gas phase temperature transmitter (TT102) connects gas phase temperature controlling instrument (TIA102), gas phase temperature controlling instrument (TIA102) output connects interlock control system, fluid level controller (LICA101) output connects interlock control system, and interlock control system output connects solenoid valve (SV).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010203017340U CN201748154U (en) | 2010-01-28 | 2010-01-28 | Large gasifier liquid-level control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010203017340U CN201748154U (en) | 2010-01-28 | 2010-01-28 | Large gasifier liquid-level control system |
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| CN201748154U true CN201748154U (en) | 2011-02-16 |
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| CN2010203017340U Expired - Fee Related CN201748154U (en) | 2010-01-28 | 2010-01-28 | Large gasifier liquid-level control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984371A (en) * | 2021-01-11 | 2021-06-18 | 深圳新美装饰建设集团有限公司 | Medical gas bus device capable of being automatically controlled and switched |
-
2010
- 2010-01-28 CN CN2010203017340U patent/CN201748154U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984371A (en) * | 2021-01-11 | 2021-06-18 | 深圳新美装饰建设集团有限公司 | Medical gas bus device capable of being automatically controlled and switched |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TIANJIN AOLIDA GAS EQUIPMENT TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: AOLIDA EQUIPMENT ENGINEERING TECH. CO., LTD., TIANJIN CITY Effective date: 20140612 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 300385 XIQING, TIANJIN TO: 300384 NANKAI, TIANJIN |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140612 Address after: 300384 Tianjin high tech Zone Huayuan Industrial Zone (outer ring) two Haitai Development Road No. 3, No. 3 Building 1 layer Patentee after: TIANJIN OLIVE GAS EQUIPMENT & TECHNOLOGY CO., LTD. Address before: 300385 Tianjin Huayuan Industrial Park of Xiqing hi tech Development Zone 2 Road No. 3 Patentee before: Tianjin Olive Equipment Engineering & Technology CO., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110216 Termination date: 20160128 |
|
| EXPY | Termination of patent right or utility model |