CN218470122U - High-sensitivity online monitoring system without leakage of dangerous media in water discharged outside - Google Patents
High-sensitivity online monitoring system without leakage of dangerous media in water discharged outside Download PDFInfo
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- CN218470122U CN218470122U CN202222609082.2U CN202222609082U CN218470122U CN 218470122 U CN218470122 U CN 218470122U CN 202222609082 U CN202222609082 U CN 202222609082U CN 218470122 U CN218470122 U CN 218470122U
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Abstract
The utility model discloses an online monitoring system for dangerous medium leakage in water with high sensitivity and no external discharge, which comprises a water inlet pipeline, a gas-liquid separation tank, a gas leakage monitoring sensor and an enterprise torch system which are connected in sequence; when a medium enters the gas-liquid separation tank through a water inlet pipeline, nitrogen or instrument wind is introduced into the lower part of the gas-liquid separation tank to blow out the gas in the gas-liquid separation tank, the gas is carried into the gas leakage monitoring sensor to be monitored, and the monitored gas is sent into an enterprise torch system. The system can realize early warning of leakage of the dangerous medium in the cooling water system, realize non-discharge of the dangerous medium, ensure the safety of the device and meet the requirement of environmental protection.
Description
Technical Field
The utility model belongs to the technical field of aquatic combustible gas leakage monitoring, in particular to flammable explosive gas leakage on-line monitoring technique is fired in petrochemical industry aquatic.
Background
The water cooler of the petrochemical device is essential key equipment for realizing energy recovery, process temperature and product temperature control. The leakage phenomenon of the water cooler is serious due to the influences of factors such as corrosion of cold exchange media, corrosion of circulating water, low quality of equipment maintenance and construction, unstable operation of production process, poor quality of sealing elements and the like, and becomes one of the main problems influencing normal production. The water cooler is subject to double corrosion by the circulating water and the cooled medium, and leakage often occurs. If the medium leaked in the cooling water contains oil, solvent and flammable, explosive and toxic gas, the water quality of the cooling water system is deteriorated to aggravate equipment corrosion, and the leaked flammable, explosive and other dangerous gases enter a water field cooling tower, the flammable, explosive and other dangerous gases are accumulated in the cooling tower, and when the concentration reaches the explosion limit, the dangerous gases are easy to explode when meeting static electricity or sparks, so that major safety production accidents are caused.
Currently, most hazardous gas monitoring is diffusion type or pump type, but both are hazardous gas monitoring in the atmospheric environment. The gas leakage monitoring in the existing circulating water is to separate out hazardous gas and water from water-gas mixture, then the separated hazardous gas enters a hazardous gas sensor for monitoring by utilizing concentration diffusion, the monitored hazardous gas is directly discharged to the atmosphere, and the separated water is directly discharged. The method has the advantages of poor monitoring stability, short service life of the sensor and high maintenance cost, the circulating water cooling system is forbidden to be discharged outside due to environmental protection requirements, the separated dangerous gas is forbidden to be directly discharged to the atmosphere, and the current circulating water gas leakage monitoring system cannot meet the actual practical requirements on site.
Therefore, how to provide a gas leakage monitoring system which has good stability, can realize early warning and meet the environmental protection requirement is a technical problem which needs to be solved urgently in the field at present.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a sensitivity is high, no outer dangerous medium leakage on-line monitoring system in water of arranging, and this system can realize the early warning that the dangerous medium of cooling water system leaked, realizes the outer row of non-of dangerous medium simultaneously, ensures device safety and satisfies the environmental protection requirement.
The utility model provides a following technical scheme:
an online monitoring system for dangerous medium leakage in water with high sensitivity and no discharge comprises a water inlet pipeline, a gas-liquid separation tank, a gas leakage monitoring sensor and an enterprise torch system which are sequentially connected, wherein nitrogen or instrument wind provided by a gas source device is introduced into the lower part of the gas-liquid separation tank; wherein, the medium gets into gas-liquid separation jar through the pipeline of entrying, and nitrogen gas or instrument wind are blown out the gas in the gas-liquid separation jar, carry and monitor in the gas leakage monitoring sensor, and the gas after the monitoring is sent into enterprise torch system.
The utility model discloses in, nitrogen gas or instrument wind are provided by the air supply unit of petrochemical industry enterprise, and the air supply unit provides the process unit of air supply for instrument or the actuating mechanism operation of petrochemical industry device. According to the petrochemical instrument gas supply design specification SH/T3020-2013, a gas source device of a petrochemical device can provide a required gas source for a whole instrument.
The utility model discloses in, enterprise's torch system is the special combustion facilities who is used for handling the combustible and combustible toxic gas and the steam that petrochemical plant, oil refinery, chemical plant and other mills or devices can't retrieve and reprocess, is the important measure of guaranteeing the safety in production of mill, reducing environmental pollution.
Preferably, a filter and a pressure reducing valve are sequentially distributed on the water inlet pipeline, and the medium sequentially passes through the filter and the pressure reducing valve and then enters the gas-liquid separation tank through the spray head.
The gas-liquid separation tank comprises a liquid level sensor for monitoring the liquid level of liquid in the gas-liquid separation tank, the bottom of the gas-liquid separation tank is connected with a water return pipeline, and a centrifugal pump is arranged on the water return pipeline.
The utility model discloses in, level sensor can the liquid level information in the real-time supervision gas-liquid separation jar to liquid according to the liquid level height of level sensor monitoring is beaten back to return water pipeline with gas-liquid separation jar's liquid through the centrifugal pump, thereby guarantees that the medium is not arranged outward.
A level sensor is a pressure sensor that measures the level of a liquid. The liquid level sensor is suitable for liquid level measurement of various media in systems and industries such as petrochemical industry, metallurgy, electric power, pharmacy, water supply and drainage, environmental protection and the like. And the water pump is automatically controlled to start and stop and drain water through the lifting of the liquid level.
Preferably, a bypass line is arranged between the water inlet line and the water return line and is used for supplementing liquid to the water return line. The suction volume of the centrifugal pump is relatively large, and the suction volume of the pump is met by introducing a bypass pipeline, so that the situation that liquid in the gas-liquid separation tank is completely sucked by the centrifugal pump is prevented.
Preferably, a shunt pipeline is arranged between the gas-liquid separation tank and the enterprise flare system, the gas in the gas-liquid separation tank is blown out by nitrogen or instrument wind and then is distributed to the gas leakage monitoring sensor for monitoring, and the other part of the gas is connected to the enterprise flare system through the shunt pipeline. Further preferably, the split ratio of the split line is 4:1. The nitrogen or the gas blown out by the instrument wind is divided, so that the flow impact on the instrument caused by overlarge gas quantity can be prevented.
And data monitored by the gas leakage monitoring sensor is displayed or output to the DSC system in real time on line.
The system comprises an electric control cabinet, wherein the electric control cabinet comprises a power supply and a controller: the controller controls the medium electromagnetic valve to be fully opened, and the medium enters the gas-liquid separation tank through the water inlet pipeline; the controller transmits data monitored by the gas leakage monitoring sensor to the DSC system; and the power supply is used for supplying power to the gas leakage monitoring sensor.
Wherein, the power supply can provide the instrument electricity among the instruments of the petrochemical plant.
Compared with the prior art that the leakage monitoring is carried out by adopting a separated gas concentration diffusion mode, and the environmental protection problem is caused by directly discharging the monitored gas and water to the atmosphere. The utility model discloses utilize gas-liquid separation technique to combine hazardous gas leakage monitor as cooling water system hazardous medium to leak on-line monitoring's main means: the form of utilizing nitrogen gas or instrument wind will separate the gas and bulge and carry and monitor in the gas leakage monitoring sensor, than the mode that utilizes concentration diffusion at present gets into the sensor, its detectivity is higher to carry dangerous medium to enterprise torch system, utilize effective means to get back the water of separation to original pipeline, thereby realize the early warning of cooling water system dangerous medium leakage, realize the non-outer row of dangerous medium simultaneously, ensure device safety and satisfy the environmental protection requirement.
Drawings
Fig. 1 is the utility model provides a prior monitoring system's of aquatic hazardous medium leakage structural schematic.
Detailed Description
The present invention provides an online monitoring system for dangerous media leakage in water, which is further described below with reference to the accompanying drawings and embodiments.
Referring to fig. 1, the system for online monitoring leakage of hazardous media in water provided by this embodiment includes: the system comprises a water inlet pipeline, a gas-liquid separation tank 19, a gas leakage monitoring sensor 26 and an enterprise torch system 21 which are connected in sequence; when the medium enters the gas-liquid separation tank 19 through a water inlet pipeline, nitrogen or instrument wind is introduced into the lower part of the gas-liquid separation tank 19 to blow out the gas in the gas-liquid separation tank, the gas is carried into the gas leakage monitoring sensor 26 to be monitored, and the monitored gas is sent into the enterprise torch system 21. The device also comprises an electric control cabinet 5, wherein the electric control cabinet 5 controls the medium electromagnetic valve 3 to be fully opened, and a medium enters the gas-liquid separation tank 19 through a water inlet pipeline; the electric control cabinet 5 can transmit the data monitored by the gas leakage monitoring sensor 26 to the DSC system; the electric control cabinet 5 is also used for supplying power to the gas leakage monitoring sensor 26.
The specific working process comprises the following steps:
in this embodiment, the medium is circulating water in a petrochemical plant water cooler.
The automatically controlled cabinet 5 control medium solenoid valve 3 is wide open, the medium passes through filter 4 and relief pressure valve 6 and gets into gas-liquid separation jar 19 through shower nozzle 15, the ball valve 29 of nitrogen gas or instrument wind interface, 30 are opened entirely, nitrogen gas or instrument wind pass through filter 28, flowmeter 27 and check valve 20 back get into gas-liquid separation jar 19 through shower nozzle 14, gas in the gas-liquid separation jar 19 is blown out, carry and monitor in the gas leakage monitoring sensor 26, the real-time online demonstration of data of monitoring also can export to device DCS system through 4 ~ 20mA, the gas access device's after the monitoring enterprise torch system 21. The medium that gets into gas-liquid separation jar 19 passes through level sensor 32 and monitors the liquid level size in the gas-liquid separation jar 19, and when the medium liquid level was too high the controller in automatically controlled cabinet 5 closed solenoid valve 3, opens centrifugal pump 11 simultaneously and beats liquid back to medium return water pipeline, and when the liquid level was low in the gas-liquid separation jar 19, the controller in automatically controlled cabinet 5 closed centrifugal pump 11, opened solenoid valve 3 simultaneously. The introduction, filtration, decompression, separation, beating back, etc. of the medium can be realized by the above arrangement.
The power supply in the electric control cabinet 5 supplies power to the gas leakage monitoring sensor 26 all the time, and transmits the data monitored by the gas leakage monitoring sensor 26 to the DCS system through the I/O port.
Specifically, the medium passes through a circulating water medium inlet 1, a ball valve 2, an electromagnetic valve 3, a filter 4 and a pressure reducing valve 6 and then enters a gas-liquid separation tank 19 through a spray head 15.
Specifically, nitrogen or instrument wind enters the gas-liquid separation tank 19 through the nozzle 14 after passing through a nitrogen or instrument wind inlet 31, a ball valve 29, a filter 28, a flow meter 27 and a one-way valve 20; the gas in the gas-liquid separation tank 19 is blown out and then carried into a gas leakage monitoring sensor 26 through a flowmeter 25 for monitoring, and an alarm is given after the early warning limit is reached. The instrument air inlet 31, the ball valve 29, the filter 28, the flow meter 27, the one-way valve 20, the spray head 14 and the flow meter 25 form an air blowing device, nitrogen/instrument air is filtered and limited by a gas source device connected with a petrochemical enterprise and then is introduced into the gas-liquid separation tank 19, and the separated gas is blown out to the gas leakage monitoring sensor 26.
Specifically, the gas monitored by the gas leakage monitoring sensor 26 is connected to the enterprise flare system 21 through the check valve 24, the ball valve 23 and the ball valve 22.
Specifically, a shunt line is provided on a line for bubbling the gas in the gas-liquid separation tank 19 to the gas leakage monitoring sensor 26, and most of the gas after the gas bubbling in the gas-liquid separation tank 19 is shunted is connected to the enterprise flare system 21 through the flowmeter 18, the check valve 17, the ball valve 16, and the ball valve 22. The flow dividing ratio can be 4:1, and the gas leakage monitoring sensor 26 can be prevented from causing flow impact on the instrument due to overlarge gas quantity by introducing a small amount of gas.
Specifically, when the liquid level sensor 32 monitors that the liquid level in the gas-liquid separation tank 19 is too high (specifically, according to a high liquid level and a low liquid level which are specifically marked in the used liquid level sensor, the liquid level is too high, which means that the liquid level reaches the high liquid level of the liquid level sensor), the liquid is sent to the circulating water medium outlet 8 through the check valve 13, the ball valve 12, the centrifugal pump 11, the check valve 10 and the ball valve 9 which are arranged on the water return pipeline in sequence. In addition, the present embodiment is obtained by introducing a bypass line, in which the ball valve 7 is disposed, between the ball valve 2 and the ball valve 12: because the suction volume of the centrifugal pump 11 is relatively large, a bypass pipeline is introduced to meet the suction volume of the centrifugal pump 11, and the situation that the liquid in the gas-liquid separation tank 19 is completely sucked by the centrifugal pump 11 is prevented.
The utility model discloses at the during operation, automatically controlled cabinet 5 passes through explosion-proof solenoid valve 3 control medium and gets into the monitor cabinet body (including gas-liquid separation jar 19, gas leakage monitoring sensor 26 and enterprise torch system 21), and the medium that gets into the monitor cabinet body is through filtering, after the step-down is handled, gets into gas-liquid separation jar 19 through the shower nozzle, and gas medium in gas-liquid separation jar 19 is blown out through a certain amount of nitrogen gas or instrument wind bottom gas-liquid separation jar 19, carries to in the gas leakage monitoring sensor 26 to carry the gas after monitoring to torch system 21, in order to reach environmental protection emission requirement; the water separated in the gas-liquid separation tank 19 is pumped back to the medium outlet pipeline through the centrifugal pump 11, so that the medium is prevented from being discharged outside. The utility model discloses utilize nitrogen gas or instrument wind to carry the gas of separation to gas leakage monitoring sensor in, more the current mode that utilizes concentration diffusion gets into the sensor, its monitoring sensitivity is higher to gas after the monitoring can carry to enterprise torch system through nitrogen gas or instrument wind, satisfies the environmental protection monitoring requirement. In addition, the separated water is pumped back to a medium pipeline through a pump, so that the non-discharge of the medium is realized.
Through the setting, the utility model provides a system can realize the function that medium autoinjection, separation, drum gas, monitoring, medium were beaten back.
Above only do the preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above embodiment, all belong to the technical scheme of the present invention all belong to the protection scope of the present invention. For those skilled in the art, numerous modifications and adaptations can be made without departing from the principles of the invention and are intended to be within the scope of the invention.
Claims (8)
1. An online monitoring system for dangerous medium leakage in water with high sensitivity and no outward discharge is characterized by comprising a water inlet pipeline, a gas-liquid separation tank, a gas leakage monitoring sensor and an enterprise torch system which are sequentially connected, wherein nitrogen or instrument wind provided by a gas source device is introduced into the lower part of the gas-liquid separation tank; wherein, the medium gets into the gas-liquid separation jar through the water inlet pipeline, and nitrogen gas or instrument wind are bloated the gas in the gas-liquid separation jar, carry and monitor in the gas leakage monitoring sensor, and the gas after the monitoring is sent into enterprise torch system.
2. The high-sensitivity online monitoring system for the leakage of the dangerous media in the water without discharging outside according to claim 1, wherein a filter and a pressure reducing valve are sequentially arranged on the water inlet pipeline, and the media sequentially pass through the filter and the pressure reducing valve and then enter the gas-liquid separation tank through a spray head.
3. The high-sensitivity online dangerous medium leakage monitoring system without discharging outside water as claimed in claim 2, wherein the gas-liquid separation tank comprises a liquid level sensor for monitoring the liquid level in the gas-liquid separation tank, the bottom of the gas-liquid separation tank is connected with a water return pipeline, and a centrifugal pump is arranged on the water return pipeline.
4. The high-sensitivity online monitoring system for the leakage of the hazardous medium in the water without discharging outside according to claim 3, wherein a bypass pipeline is arranged between the water inlet pipeline and the water return pipeline and used for supplementing liquid to the water return pipeline.
5. The high-sensitivity online monitoring system for the leakage of the hazardous media in water without discharging outside of the water tank as claimed in claim 1, wherein a shunt pipeline is arranged between the gas-liquid separation tank and the enterprise torch system, the gas in the gas-liquid separation tank is blown out by nitrogen or instrument wind and then is sent to the gas leakage monitoring sensor for monitoring, and the other part of the gas is connected to the enterprise torch system through the shunt pipeline.
6. The high-sensitivity online dangerous medium leakage monitoring system without discharging outside water as claimed in claim 5, wherein the split ratio of the split pipeline is 4:1.
7. The high-sensitivity online dangerous medium leakage monitoring system without discharging outside water as claimed in claim 1, wherein the data monitored by the gas leakage monitoring sensor is displayed or output to the DSC system in real time on line.
8. The high-sensitivity online monitoring system for the leakage of the dangerous media in the water without discharging outside of the water as claimed in claim 1, wherein the system comprises an electric control cabinet, the electric control cabinet comprises a power supply and a controller: the controller controls the medium electromagnetic valve to be fully opened, and the medium enters the gas-liquid separation tank through the water inlet pipeline; the controller transmits data monitored by the gas leakage monitoring sensor to the DSC system; and the power supply is used for supplying power to the gas leakage monitoring sensor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220945751 | 2022-04-22 | ||
| CN2022209457510 | 2022-04-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218470122U true CN218470122U (en) | 2023-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222609082.2U Active CN218470122U (en) | 2022-04-22 | 2022-09-30 | High-sensitivity online monitoring system without leakage of dangerous media in water discharged outside |
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| Country | Link |
|---|---|
| CN (1) | CN218470122U (en) |
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2022
- 2022-09-30 CN CN202222609082.2U patent/CN218470122U/en active Active
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