CN210664896U - On-line ammonia leakage detection system - Google Patents
On-line ammonia leakage detection system Download PDFInfo
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- CN210664896U CN210664896U CN201921766992.3U CN201921766992U CN210664896U CN 210664896 U CN210664896 U CN 210664896U CN 201921766992 U CN201921766992 U CN 201921766992U CN 210664896 U CN210664896 U CN 210664896U
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- Prior art keywords
- nitrogen
- pipeline
- ammonia
- purging
- recovery
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 43
- 238000001514 detection method Methods 0.000 title claims abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 135
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 67
- 238000010926 purge Methods 0.000 claims abstract description 49
- 238000011084 recovery Methods 0.000 claims abstract description 33
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract description 5
- 239000004202 carbamide Substances 0.000 abstract description 5
- 230000001502 supplementing effect Effects 0.000 description 10
- 238000004064 recycling Methods 0.000 description 6
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Abstract
The utility model discloses an online ammonia leakage detection system has solved the problem that current urea high-pressure coil equipment corrodes and leads to the damaged safety accident that leaks and produce of lining. The technical scheme includes that the device comprises a nitrogen purging pipeline, a nitrogen recovery pipeline and a detection instrument, wherein the nitrogen purging pipeline is connected with a plurality of groups of purging branch pipelines connected in parallel; the nitrogen recovery pipeline is connected with a plurality of groups of associated recovery branch pipelines; the multiple groups of parallel purging branch pipelines are provided with a first flowmeter and a purging valve respectively, and the multiple groups of parallel recovery branch pipelines are provided with recovery valves respectively; and a heat exchanger, an ammonia detector, an ammonia filter and a fan are sequentially arranged on a pipeline connected between the nitrogen recovery pipeline and the nitrogen purging pipeline, and the ammonia detector is connected with an alarm unit of the DCS through a wired or wireless way. The utility model discloses the system is simple, can be fast the damaged ammonia that leads to of on-line measuring equipment inside lining leak and in time send the warning, be convenient for seek the leakage point, the operation is stable, the security is good, the reliability is high.
Description
Technical Field
The utility model relates to an equipment leak testing system, specific online ammonia leak testing system that says so.
Background
In order to prevent the special equipment of the urea high-pressure ring from being corroded by corrosive solution, the special high-pressure equipment generally adopts a carbon steel shell and a stainless steel lining (some of the special corrosion-resistant steel), if the lining is damaged, the leakage phenomenon occurs, and the carbon steel shell of the high-pressure equipment can be quickly corroded to cause serious accidents. Therefore, how to find ammonia leakage in time and avoid damage to personnel, equipment and environment is important for ensuring the safe production of the urea device.
Disclosure of Invention
The utility model aims at solving the technical problem, provide a system simple, can be fast the damaged ammonia that leads to of online detection equipment inside lining leak poor problem and in time send the warning, be convenient for seek leakage point, the system operation is stable, the security is good, the online ammonia leak testing system that the reliability is high.
The technical scheme includes that the device comprises a nitrogen purging pipeline and a nitrogen recovery pipeline, wherein a plurality of groups of purging branch pipelines connected in parallel are connected to the nitrogen purging pipeline, and a nozzle of each purging branch pipeline is positioned between an outer shell and an inner liner of the device; the nitrogen recovery pipeline is connected with a plurality of groups of associated recovery branch pipelines, and recovery ports of the recovery branch pipelines are positioned between the shell and the lining of the equipment; the multiple groups of parallel purging branch pipelines are provided with a first flowmeter and a purging valve respectively, and the multiple groups of parallel recovery branch pipelines are provided with recovery valves respectively; and a heat exchanger, an ammonia detector, an ammonia filter and a fan are sequentially arranged on a pipeline connected between the nitrogen recovery pipeline and the nitrogen purging pipeline, and the ammonia detector is connected with an alarm unit of the DCS through a wired or wireless way.
And a second flowmeter and a thermometer are also arranged on a pipeline between the heat exchanger and the ammonia detector.
The nitrogen purging pipeline is also connected with an inlet of the fan through a first pressure gauge and a first pressure regulating valve.
The nitrogen purging pipeline is also connected with a nitrogen supplementing pipeline, and a supplementing valve, a second pressure gauge and a second pressure regulating valve are arranged on the nitrogen supplementing pipeline.
The nitrogen purging pipeline is also connected with a breathing water tank.
The nitrogen purging pipeline is also connected with a U-shaped pipe pressure indicator.
Has the advantages that:
1) the system adds the circulating nitrogen into the space between the equipment shell and the lining through the nozzle of the blowing branch pipeline, and the circulating nitrogen is recycled by the recycling branch pipeline; when the equipment lining has the damage, circulation nitrogen gas can carry out the ammonia of revealing as the carrier gas, gets into the system and is detected by the ammonia detector after retrieving by retrieving the branch pipeline, and the ammonia that detects reveals that the signal accessible wired or wireless mode sends the warning to DCS monitored control system's alarm unit and reports to the police, realizes the long-range quick detection and the control of revealing urea high-pressure ring key equipment ammonia.
2) The nitrogen purging pipeline is connected with a plurality of groups of purging branch pipelines connected in parallel, and the corresponding nitrogen recovery pipeline is connected with a plurality of groups of associated recovery branch pipelines, so that nitrogen leakage can be synchronously monitored on line for a plurality of devices or a plurality of positions of the devices.
3) The recycled circulating nitrogen is connected with the nitrogen sweeping pipeline for recycling after ammonia is removed through the ammonia filter, and when the pressure is insufficient, the nitrogen can be supplemented through the nitrogen supplementing pipeline, so that the sweeping pressure is maintained.
4) The breathing water tank can control the pressure within a set range, and when the pressure exceeds the standard, the breathing water tank can perform pressure relief protection, so that the safety of the equipment lining is ensured.
5) The utility model discloses the system is simple, can be fast the damaged ammonia that leads to of on-line measuring equipment inside lining leak poor problem and in time send the warning, be convenient for seek leakage point, the system operation is stable, the security is good, the reliability is high, be applicable to long-range, convenient, quick detection and control that urea circle high-tension apparatus ammonia was revealed.
Drawings
Fig. 1 is a system diagram of the present invention.
The system comprises a nitrogen purging pipeline 1, a nitrogen purging branch pipeline 2, a nitrogen recycling pipeline 3, a nitrogen recycling branch pipeline 4, a recycling branch pipeline 5, a purging valve 6, a recycling valve 7, a heat exchanger 8, an ammonia detector 9, an ammonia filter 10, a fan 11, a DCS system 11, a second flowmeter 12, a thermometer 13, a first pressure gauge 14, a first pressure regulating valve 15, a nitrogen supplementing pipeline 16, a supplementing valve 17, a second pressure gauge 18, a second pressure regulating valve 19, a breathing water tank 20, a U-shaped pipe pressure indicator 21 and a first flowmeter 22.
Detailed Description
The invention will be further explained with reference to the drawings:
referring to fig. 1, a plurality of groups of parallel purging branch lines 2 are connected to a nitrogen purging line 1, and nozzles of the purging branch lines 2 are positioned between an outer shell and an inner liner (not shown in the figure) of the equipment; a plurality of groups of associated recovery branch pipelines 4 are connected to the nitrogen recovery pipeline 3, and recovery ports of the recovery branch pipelines 4 are positioned between an outer shell and an inner liner of the equipment (not shown in the figure); the multiple groups of parallel purging branch pipelines 2 are provided with a first flowmeter 22 and a purging valve 5, and the multiple groups of parallel recovery branch pipelines 4 are provided with a recovery valve 6; the pipeline connected between the nitrogen recovery pipeline 3 and the nitrogen purging pipeline 1 is sequentially provided with a heat exchanger 7, a second flowmeter 12, a thermometer 13, an ammonia detector 8, an ammonia filter 9 and a fan 10, wherein the ammonia detector 8 is connected with an alarm unit of a DCS (distributed control system) 11 of a factory in a wired or wireless mode.
The nitrogen purging pipeline 1 is also connected with an inlet of the fan 10 through a first pressure gauge 14 and a first pressure regulating valve 15.
The nitrogen purging pipeline 1 is also connected with a nitrogen supplementing pipeline 16, and a supplementing valve 17, a second pressure gauge 18 and a second pressure regulating valve 19 are arranged on the nitrogen supplementing pipeline 16.
The nitrogen purging pipeline is also connected with a breathing water tank 20 and a U-shaped pipe pressure indicator 21.
The working principle is as follows:
nitrogen enters a plurality of parallel purging branch pipelines 2 through a nitrogen purging pipeline 1, then enters a channel between an outer shell and an inner liner of the equipment through a nozzle through a first flowmeter 22 and a purging valve 5 respectively for purging, then enters a recovering branch pipeline 4 through a recovering port on the other side of the channel for recovering the nitrogen, the nitrogen in the plurality of parallel recovering branch pipelines 4 is collected through a nitrogen recovering pipeline 3, then is cooled through a heat exchanger to ensure the normal work of an ammonia detector 8, then enters the ammonia detector 8 through a second flowmeter 12 and a thermometer 13, measures ammonia in the circulating nitrogen in real time on line through the nitrogen detector 8, and then the circulating nitrogen is filtered through an ammonia filter 9 and then is pressurized and returned to the nitrogen purging pipeline 1 through a fan 10 for circulating purging so as to realize uninterrupted circulation of the nitrogen. When the pressure of the circulating nitrogen is insufficient, nitrogen is supplemented through a nitrogen supplementing pipeline 16 to ensure the purging pressure; the breathing water tank 20 controls the pressure of the nitrogen within a set range, and when the pressure exceeds the set range, the breathing water tank 20 can perform pressure relief protection, so that the safety of the lining of the equipment is ensured.
If ammonia leaks due to damage of the equipment lining, the ammonia detector 8 can detect in time and transmit a signal to an alarm unit of the DCS 11 to give an alarm. And at the moment, the system should be immediately stopped, and the recovery valves 6 of the recovery branch pipelines 4 are manually closed one by one to check the leakage loop, so that the position of the leakage point is found, and the equipment is overhauled.
Claims (6)
1. An online ammonia leakage detection system is characterized by comprising a nitrogen purging pipeline and a nitrogen recovery pipeline, wherein the nitrogen purging pipeline is connected with a plurality of groups of purging branch pipelines connected in parallel, and nozzles of the purging branch pipelines are positioned between an outer shell and an inner liner of equipment; the nitrogen recovery pipeline is connected with a plurality of groups of associated recovery branch pipelines, and recovery ports of the recovery branch pipelines are positioned between the shell and the lining of the equipment; the multiple groups of parallel purging branch pipelines are provided with a first flowmeter and a purging valve respectively, and the multiple groups of parallel recovery branch pipelines are provided with recovery valves respectively; and a heat exchanger, an ammonia detector, an ammonia filter and a fan are sequentially arranged on a pipeline connected between the nitrogen recovery pipeline and the nitrogen purging pipeline, and the ammonia detector is connected with an alarm unit of the DCS through a wired or wireless way.
2. The on-line ammonia slip detection system of claim 1 wherein a second flow meter and thermometer are also provided in the line between the heat exchanger and the ammonia detector.
3. The system for detecting ammonia leakage of the online type according to claim 1 or 2, wherein the nitrogen purge line is further connected with an inlet of the blower through a first pressure gauge and a first pressure regulating valve.
4. The system of claim 1 or 2, wherein the nitrogen purge line is further connected to a nitrogen make-up line, and the nitrogen make-up line is provided with a make-up valve, a second pressure gauge and a second pressure regulating valve.
5. The on-line ammonia leak detection system of claim 1 or 2, wherein the nitrogen purge line is further connected to a breathing water tank.
6. The on-line ammonia leak detection system of claim 1 or 2, wherein a U-tube pressure indicator is further connected to the nitrogen purge line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921766992.3U CN210664896U (en) | 2019-10-21 | 2019-10-21 | On-line ammonia leakage detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921766992.3U CN210664896U (en) | 2019-10-21 | 2019-10-21 | On-line ammonia leakage detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210664896U true CN210664896U (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921766992.3U Active CN210664896U (en) | 2019-10-21 | 2019-10-21 | On-line ammonia leakage detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115773845A (en) * | 2023-02-13 | 2023-03-10 | 上腾科技(广州)有限公司 | Electrolyte leakage standard calibrating device |
-
2019
- 2019-10-21 CN CN201921766992.3U patent/CN210664896U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115773845A (en) * | 2023-02-13 | 2023-03-10 | 上腾科技(广州)有限公司 | Electrolyte leakage standard calibrating device |
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