CN202152912U - Large-scale liquid ammonia carburetor - Google Patents
Large-scale liquid ammonia carburetor Download PDFInfo
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- CN202152912U CN202152912U CN2011200679762U CN201120067976U CN202152912U CN 202152912 U CN202152912 U CN 202152912U CN 2011200679762 U CN2011200679762 U CN 2011200679762U CN 201120067976 U CN201120067976 U CN 201120067976U CN 202152912 U CN202152912 U CN 202152912U
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- carburetor
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Abstract
The utility model discloses a large-scale liquid ammonia carburetor. An ammonia liquid phase pipeline enters a carburetor after passing an inlet flange ball valve, a filter, a liquefied gas adjusting valve and an outlet flange ball valve in sequence; and an output pipeline of the carburetor outputs gaseous ammonia by a flange cutoff valve. In the carburetor, a liquid inlet adjusting valve is controlled by the concatenation between the ammonia liquid level in the carburetor and outlet pressure so as to be applicable to pressure with various loads and fluctuation of flow; and according to the change of usage amount of a user, the liquid inlet amount of the liquid ammonia in the carburetor can be controlled timely, so that the outlet pressure of the carburetor and the liquid level of the liquid ammonia in the carburetor can be controlled in corresponding ranges. The large-scale liquid ammonia carburetor introduces an interlocking control function for the low gas phase temperature of the carburetor and the overhigh liquid level of the liquid ammonia, so that when the alarm happens for alarming the low limit of the phase temperature of the ammonia and for alarming the high limit of the liquid level of the liquid ammonia, an electromagnetic valve arranged on a gas circuit between a valve positioning device on a liquid ammonia inlet adjusting valve and a pneumatic actuating mechanism is used for closing an ammonia inlet adjusting valve, thereby avoiding the phenomenon of excessive liquid and ensuring the safe and reliable operation of the carburetor.
Description
Technical field
The utility model belongs to chemical machinery, particularly a kind of large-scale liquefied ammonia vaporizer.
Background technique
Liquefied ammonia vaporizer air feed system in the commercial production; Because the variation of user's gas consumption and other factors cause the flow of air supply system output and the change of pressure; Can cause very big influence to commercial production; Even can liquid appear because the control of vaporizer amount of vaporization imbalance, outlet pressure is too high or the ammonia temperature is crossed low and influence is produced or caused the accident.Therefore large-scale liquefied ammonia vaporizer 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
The utility model technical problem to be solved is: a kind of large-scale liquefied ammonia vaporizer is provided.
The technological scheme of the utility model is:
A kind of large-scale liquefied ammonia vaporizer is characterized in that: the ammonia liquid-phase tube connects filter, filter connection PLV liquefied ammonia modulating valve, PLV liquefied ammonia modulating valve connection suction flange ball valve two through suction flange ball valve one, and suction flange ball valve two connects vaporizers; The ammonia liquid-phase tube is connected to the bypass of outlet(discharge) flange ball valve rear end as the ammonia liquid-phase tube through suction flange ball valve one front end through the bypass Flange Globe Valves; The vaporizer output tube connects gaseous state ammonia output tube through Flange Globe Valves;
The PT102 pressure transmitter connects the PICA102 pressure controller; The LT101 level meter connects the LICA101 fluid level controller; The output of PICA102 pressure controller connects the input of LICA101 fluid level controller; The output of LICA101 fluid level controller connects the PLY valve positioner, and the PLY valve positioner connects the SV solenoid valve, and the SV solenoid valve connects PLV liquefied ammonia modulating valve through pneumatic actuator; Instrument air connects the PLY valve positioner through ball valve;
TT102 gas phase temperature transmitter connects TIA102 gas phase temperature controlling instrument; TIA102 gas phase temperature controlling instrument connects interlock control system; The LICA101 fluid level controller connects interlock control system, and the PICA102 pressure controller connects interlock control system, and interlock control system connects the SV solenoid valve;
Vaporizer is provided with T1～T2 thermometer, and pipeline is provided with P1～P4 pressure meter, PT101～PT102 pressure transducer, PI101～PI102 pressure-display instrument.
The utility model effect is:
The large-scale liquefied ammonia vaporizer of the utility model.Liquefied ammonia makes the amount of vaporization The profile of vaporizer through the needs entering vaporizer of liquefied ammonia modulating valve according to gas consumption, and output adapts to the ammonia 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 liquefied ammonia feed liquor amount in the vaporizer in time, and vaporizer outlet pressure and liquefied ammonia liquid level are controlled in the scope of requirement.Introduced the interlocked control function that the liquefied ammonia gas phase temperature is low excessively, the liquefied ammonia liquid level is too high and outlet pressure is too high in this system; Then the solenoid valve on the gas circuit cuts out automatically the liquefied ammonia modulating valve between valve positioner to the pneumatic actuator through being installed on the liquid gas modulating valve as long as occur promptly that liquefied ammonia gas phase temperature lower bound is reported to the police, the high limit of liquefied ammonia liquid level is reported to the police and the high limit of ammonia outlet pressure is reported to the police; In case the liquid phenomenon occurred, guarantee large-scale vaporizer safe and reliable operation.
Large-scale liquefied ammonia vaporizer advantage and effect:
(1) on system architecture; This control system is controlled liquid level and pressure with the cascade control system of a pressure definite value and liquid level servo-actuated; Therefore fluctuate the gas consumption pressure that causes and the variation of flow of feedback load in time; Automatically control gets into the amount of the liquefied ammonia of vaporizer, makes to keep certain liquid level and outlet pressure in the vaporizer, to adapt to the needs of various loads.
(2) on system architecture; This control system has a cover interlock control system; As long as then the solenoid valve on the gas circuit cuts out automatically the liquefied ammonia modulating valve between valve positioner to the pneumatic actuator on the liquefied ammonia modulating valve through being installed in the warning of ammonia gas phase temperature lower bound, the high limit warning of liquefied ammonia liquid level or gaseous phase outlet pressure alarm promptly to occur; In case the liquid phenomenon occurred, guarantee large-scale vaporizer safe and reliable operation.
Description of drawings
Fig. 1 is large-scale liquefied ammonia vaporizer pipeline and control flow chart,
Among the figure: 1 Flange Ball Valves, one, 2 filter, 3 Flange Ball Valvess, two, 4 Flange Globe Valvess, 5 large-scale vaporizers; 6 interlock control systems, the import of N1 instrument supply gas, N2 liquefied ammonia inlet, N3 gaseous state ammonia outlet, SV solenoid valve; The PLY valve positioner, PLV liquefied ammonia modulating valve, T1～T2 thermometer, P1～P4 pressure meter, PT102 pressure transducer; TT102 gas phase temperature transmitter, LT101 level meter, TIA102 gas phase temperature controlling instrument, PI101～PI102 pressure-display instrument, LICA101 fluid level controller.
Embodiment
A kind of large-scale liquefied ammonia vaporizer as shown in Figure 1, the ammonia liquid-phase tube connects filter, filter connection PLV liquefied ammonia modulating valve, PLV liquefied ammonia modulating valve connection suction flange ball valve two through suction flange ball valve one, and suction flange ball valve two connects vaporizers; The ammonia liquid-phase tube is connected to the bypass of outlet(discharge) flange ball valve rear end as the ammonia liquid-phase tube through suction flange ball valve one front end through the bypass Flange Globe Valves; The vaporizer output tube connects gaseous state ammonia output tube through Flange Globe Valves;
The PT102 pressure transducer connects the PICA102 pressure controller; The LT101 level meter connects the LICA101 fluid level controller; The output terminal of PICA102 pressure controller connects the set input of LICA101 fluid level controller; The LICA101 fluid level controller connects the PLY valve positioner, and the PLY valve positioner connects the SV solenoid valve, and the SV solenoid valve connects PLV liquefied ammonia modulating valve through pneumatic actuator; Instrument air connects the PLY valve positioner through ball valve;
TT102 gas phase temperature transmitter connects TIA102 gas phase temperature controlling instrument; TIA102 gas phase temperature controlling instrument connects interlock control system; The LICA101 fluid level controller connects interlock control system, and the PICA102 pressure controller connects interlock control system, and interlock control system connects the SV solenoid valve;
Large-scale vaporizer is provided with T1～T2 thermometer, and pipeline is provided with P1～P4 pressure meter, PT101～PT102 pressure transducer, PI101～PI102 pressure-display instrument.
Its control system is connected to: the outlet pressure object P102 in the large-scale liquefied ammonia vaporizer of main object connects pressure transducer PT102; Pressure transducer PT102 output feedback connects pressure controller PICA102 and measures input end; Liquefied ammonia liquid level object L101 in the vaporizer connects level meter LT101; Level meter LT101 output feedback connects fluid level controller LICA101 and measures input end; Pressure controller PICA102 output connects fluid level controller LICA101 set input, and fluid level controller LICA101 output connects valve positioner PLY, and valve positioner PLY connects solenoid valve SV; Solenoid valve connects liquefied ammonia modulating valve PLV, and liquefied ammonia modulating valve PLV output connects liquefied ammonia 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 pressure controller PICA102 output connects interlock control system, and interlock control system output connects solenoid valve SV.
Its large-scale liquefied ammonia vaporizer:
Large-scale liquefied ammonia vaporizer can be realized needing accurate control to get into the amount of the liquefied ammonia of vaporizer according to the user, keeps certain liquid level and pressure, to reach the purpose that output adapts to the gaseous state ammonia of different load requirement.
(1) cascade control system of liquefied ammonia pressure-liquid level: liquefied ammonia pressure-liquid level tandem is controlled to be the control system of pressure definite value liquid level servo-actuated, realizes the follow-up adjustment to outlet pressure definite value in the vaporizer and liquefied ammonia liquid level.Detect the measured value of the currency of vaporizer outlet pressure by pressure transducer PT102 as pressure controller PICA102; Pressure controller PICA102 does this measured value and outlet pressure setting value and relatively obtains pressure divergence; And this deviation carried out output 4-20mA control signal after P, I, the D computing; Level meter LT101 detects the measured value of the currency of vaporizer liquefied ammonia liquid level as fluid level controller LICA101; Fluid level controller LICA101 does the output of this measured value and pressure controller and relatively 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 liquefied ammonia modulating valve PLV that is positioned on the vaporizer liquid phase pipeline, thereby its aperture is changed what of amount that control gets into the liquefied ammonia of vaporizer are realized regulating automatically continuously the liquid gas liquid level.
Because large-scale liquefied ammonia vaporizer gas phase temperature is low excessively, the liquid gas liquid level is too high and outlet pressure is too high, all the liquid phenomenon possibly occur, 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 liquefied ammonia vaporizer, be provided with outlet pressure transmitter PT102, ammonia gas phase temperature transmitter TT102 and liquefied ammonia level meter LT101; On setting pressure lower bound alarm point, gas phase temperature controlling instrument TIA102 on the pressure controller PICA102, set temperature lower bound alarm point accordingly, on fluid level controller LICA101, set the high limit of liquid level alarm point; The high limit of outlet pressure, gas phase temperature lower bound or liquefied ammonia liquid level are in limited time high when taking place; Promptly send acoustooptic alarm, cut off the power supply of solenoid valve SV simultaneously, valve positioner PLY is cut off to the instrument air between the pneumatic actuator; Liquid gas modulating valve PLV is closed fully, guarantee safety.Get rid of when fault, when overload alarm was removed, solenoid valve SV restored electricity, and liquefied ammonia modulating valve PLV can get into normal state of a control again.
Claims (2)
1. one kind large-scale liquefied ammonia vaporizer is characterized in that: the ammonia liquid-phase tube connects through the suction flange ball valve that filter, filter connect PLV liquefied ammonia inlet adjusting valve, PLV liquefied ammonia inlet adjusting valve connects the outlet(discharge) flange ball valve, and the outlet(discharge) flange ball valve connects vaporizer; The ammonia liquid-phase tube is connected to the bypass of outlet(discharge) flange ball valve rear end as the ammonia liquid-phase tube through suction flange ball valve front end through the bypass Flange Globe Valves; The vaporizer output tube connects gaseous state ammonia output tube through Flange Globe Valves;
The PT101 pressure transducer connects the PICA102 pressure controller; The LT101 level meter connects the LICA101 fluid level controller; The output of PICA102 pressure controller connects the LICA101 fluid level controller; The LICA101 fluid level controller connects the PLY valve positioner, and the PLY valve positioner connects the SV solenoid valve, and the SV solenoid valve connects PLV liquid gas modulating valve through pneumatic actuator; Instrument air connects the PLY valve positioner through ball valve;
TT102 gas phase temperature transmitter connects TIA102 gas phase controller; TIA102 gas phase controller connects interlock control system; The LICA101 fluid level controller connects interlock control system, and the PICA102 pressure controller connects interlock control system, and interlock control system connects the SV solenoid valve;
Vaporizer is provided with T1～T2 thermometer, and pipeline is provided with P1～P4 pressure meter, PT101～PT102 pressure transducer, PI101～PI102 pressure-display instrument.
2. large-scale liquefied ammonia vaporizer according to claim 1; It is characterized in that: its control system is connected to: the ammonia gaseous phase outlet pressure object P102 in the large-scale liquefied ammonia vaporizer of main object connects pressure transducer PT102; Pressure transducer PT102 output feedback connects pressure controller PICA102 and measures input end, and liquefied ammonia liquid level object L101 connects level meter LT101, and level meter LT101 output feedback connects fluid level controller LICA101 and measures input end; Pressure controller PICA102 output connects fluid level controller LICA101 input end; LICA101 output connects valve positioner PLY, instrument air cut-in valve door holder PLY, and valve positioner PLY connects solenoid valve SV; Solenoid valve SV connects liquefied ammonia modulating valve PLV, and liquefied ammonia modulating valve PLV output connects liquefied ammonia liquid level object L101; Ammonia gas phase temperature object T102 in the large-scale liquefied ammonia 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; Pressure controller PICA102 output connects interlock control system, and 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 |
|---|---|---|---|
| CN2011200679762U CN202152912U (en) | 2011-03-15 | 2011-03-15 | Large-scale liquid ammonia carburetor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200679762U CN202152912U (en) | 2011-03-15 | 2011-03-15 | Large-scale liquid ammonia carburetor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202152912U true CN202152912U (en) | 2012-02-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200679762U Expired - Fee Related CN202152912U (en) | 2011-03-15 | 2011-03-15 | Large-scale liquid ammonia carburetor |
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| CN (1) | CN202152912U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676987A (en) * | 2013-12-18 | 2014-03-26 | 中煤第五建设有限公司 | Freezing station liquid ammonia automatic control system |
| CN104075107A (en) * | 2013-03-27 | 2014-10-01 | 上海飞奥燃气设备有限公司 | Technological process of LNG gasification |
| CN109621624A (en) * | 2018-12-18 | 2019-04-16 | 安徽海螺集团有限责任公司 | The control method of safety instrumented systems in carbon dioxide capture system liquefied ammonia region |
-
2011
- 2011-03-15 CN CN2011200679762U patent/CN202152912U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075107A (en) * | 2013-03-27 | 2014-10-01 | 上海飞奥燃气设备有限公司 | Technological process of LNG gasification |
| CN104075107B (en) * | 2013-03-27 | 2015-12-02 | 上海飞奥燃气设备有限公司 | A kind of technological process of LNG gasification |
| CN103676987A (en) * | 2013-12-18 | 2014-03-26 | 中煤第五建设有限公司 | Freezing station liquid ammonia automatic control system |
| CN109621624A (en) * | 2018-12-18 | 2019-04-16 | 安徽海螺集团有限责任公司 | The control method of safety instrumented systems in carbon dioxide capture system liquefied ammonia region |
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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 |
Granted publication date: 20120229 Termination date: 20160315 |
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| CF01 | Termination of patent right due to non-payment of annual fee |