CN111167771A - Online closed cleaning and detecting system and technological method for flame arrester - Google Patents
Online closed cleaning and detecting system and technological method for flame arrester Download PDFInfo
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- CN111167771A CN111167771A CN202010094890.2A CN202010094890A CN111167771A CN 111167771 A CN111167771 A CN 111167771A CN 202010094890 A CN202010094890 A CN 202010094890A CN 111167771 A CN111167771 A CN 111167771A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/10—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing diffusion of components through a porous wall and measuring a pressure or volume difference
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Abstract
The invention relates to the technical field of cleaning and detecting of flame arresters, and provides a system and a process method for online closed cleaning and detecting of flame arresters. After the flame arrester is blocked, the descaling problem of the flame arrester can be effectively solved without detaching the flame arrester; the process route utilizes the characteristic of impurities causing blockage in the flame arrester, and through designing a reasonable cleaning sequence, large granular impurities attached to the flame retardant disc are removed by fresh water, viscous impurities in the flame retardant disc are removed by high-temperature steam again, and finally, purging of a pipeline and inspection of a descaling effect are completed by nitrogen; through the process flow design, the online closed cleaning of the flame arrester and the state self-checking function after cleaning can be completed, the descaling efficiency of the flame arrester of the device can be effectively improved, the construction risk of operators is reduced, and the process safety and the effect reliability are ensured.
Description
Technical Field
The invention relates to the technical field of cleaning and detection of flame arresters, in particular to a system and a process method for online closed cleaning and detection of flame arresters.
Background
The pipeline that the refinery enterprise carried combustible gas need set up the spark arrester according to standard requirement, very easily leads to the spark arrester to block up (for example, the gaseous phase pipeline spark arrester of crude oil jar, sump oil jar, middle oil jar) when impurity is more in the carrier gas, and the spark arrester blocks up and leads to pipeline fluid circulation not smooth, and differential pressure increases around the spark arrester specifically shows. The only current solution for the refinery to combat the plugging of the flame arrestors is to remove the flame arrestors and then clean them by a maintenance unit.
Because the steel strip clearance of the fire retardant plate is very small, the blockage phenomenon of the fire retardant device mainly occurs in the first fire retardant plate facing the wind direction. Because the main impurity causing the blockage of the flame arrester is oil sludge, the flame arrester is difficult to clean by fresh water in the cleaning process, and the oil sludge can be blown out after being heated by steam when necessary. Because the work load of not only dismantling of manual cleaning is big, has the potential safety hazard when the medium such as used water, steam is operated moreover when washing to manual cleaning effect real-time detection can't exist and actually sweep the condition that the effect can't be guaranteed.
Disclosure of Invention
Aiming at the problems that the existing refinery organic gas flame arrester is time-consuming and labor-consuming to disassemble and assemble, safe risk exists in the cleaning process, the cleaning effect cannot be checked and the like when the existing refinery organic gas flame arrester is cleaned, the invention designs the online closed cleaning and detecting system and process of the flame arrester, which can prevent the flame arrester from being removed to complete the cleaning of the flame arrester and reduce the construction risk of operators.
The invention adopts the following technical scheme:
a system for online airtight cleaning and detection of a flame arrester comprises the flame arrester, a first cut-off valve, a combustible gas inlet, a second cut-off valve and a combustible gas outlet, wherein an inlet pipeline of the flame arrester is connected with the combustible gas inlet through the first cut-off valve, and an outlet pipeline of the flame arrester is connected with the combustible gas outlet through the second cut-off valve;
the fire arrestor is characterized by further comprising a third stop valve, a fourth stop valve, a differential pressure gauge, a fifth stop valve, a water pipe network and an oily sewage outlet, wherein the inlet pipeline and the outlet pipeline of the fire arrestor are connected with the differential pressure gauge through the third stop valve and the fourth stop valve respectively; an outlet pipeline of the flame arrester is connected with a water pipe network through a fifth cut-off valve; the bottom of the fire arrester is provided with a condensation discharge port connected with the oily sewage outlet.
Further, still include steam drum and sixth trip valve, the outlet pipe line of spark arrester passes through the sixth trip valve and links to each other with the steam drum.
Further, still include nitrogen gas jar and eighth trip valve, the inlet line of spark arrester passes through the eighth trip valve and links to each other with the nitrogen gas jar.
Furthermore, arrange and congeal the mouth and have two, arrange and congeal the mouth including first row and arrange with the second, set up respectively in the both ends of the bottom of spark arrester.
And the first condensation discharge port and the second condensation discharge port are connected with the oily sewage outlet through the first sewage discharge pipeline and the second sewage discharge pipeline respectively.
Further, still include seventh trip valve and ninth trip valve, seventh trip valve and ninth trip valve set up respectively on first sewage pipes and second sewage pipes.
A process method for online closed cleaning and detection of a flame arrester is implemented based on the online closed cleaning and detection system for the flame arrester, and comprises the following steps:
(1) when the flame arrester normally works, the first cut-off valve, the second cut-off valve, the third cut-off valve and the fourth cut-off valve are normally opened; the fifth cut-off valve, the sixth cut-off valve, the seventh cut-off valve, the eighth cut-off valve and the ninth cut-off valve are normally closed; the differential pressure gauge measures the differential pressure before and after the flame arrester in real time;
entering a cleaning process when the differential pressure measured by the differential pressure gauge reaches an alarm value;
(2) the cleaning process comprises a water washing process;
when the water is washed, the first cut-off valve, the second cut-off valve, the third cut-off valve and the fourth cut-off valve are closed, the fifth cut-off valve and the seventh cut-off valve are opened, water in the water pipe network is reversely injected into the cavity of the flame arrester, and large-particle attachments on the fire resisting disc are flushed away by the water and then are discharged to an oily sewage outlet through the seventh cut-off valve, so that the large-particle attachments are discharged to the outside of the system.
Further, the cleaning process also comprises a steam purging process;
when steam purging is performed, the first cut-off valve, the second cut-off valve, the third cut-off valve and the fourth cut-off valve are closed, the eighth cut-off valve and the ninth cut-off valve are closed, and the fifth cut-off valve is closed; and the seventh cut-off valve is opened, the sixth cut-off valve is opened, steam in the steam tank is reversely injected into the cavity of the flame arrester, and the sticky attachments attached to the flame-retardant disc are heated and blown by the steam and then discharged to the oily sewage outlet through the seventh cut-off valve, so that the sticky attachments are discharged out of the system.
Further, the cleaning process also comprises a nitrogen purging process;
when nitrogen is blown, the first cut-off valve, the second cut-off valve and the fifth cut-off valve are closed; the sixth cut-off valve and the seventh cut-off valve are closed; and opening a third stop valve, a fourth stop valve, an eighth stop valve and a ninth stop valve, reducing the pressure of the nitrogen through the eighth stop valve, then entering a flame arrester cavity, and discharging the nitrogen to an oily sewage outlet through the ninth stop valve so as to discharge the nitrogen to the outside of the system.
Further, during nitrogen purging, a differential pressure gauge measures the pressure difference between the front and the back of the flame arrester, and if the pressure difference value of the differential pressure gauge does not meet a set value, the cleaning process is continuously repeated; if the differential pressure value of the differential pressure gauge meets a set value, the flame arrester is washed to be qualified, the cleaning process of the flame arrester is completed, the eighth cut-off valve and the ninth cut-off valve are closed, the first cut-off valve and the second cut-off valve are opened, the system is recovered to be normal, and the flame arrester enters into normal work.
The invention has the beneficial effects that:
the online closed descaling and detection method is provided, and the descaling problem of the flame arrester can be effectively solved without dismantling the flame arrester after the flame arrester is blocked; the process route utilizes the characteristic of impurities causing blockage in the flame arrester, and through designing a reasonable cleaning sequence, large granular impurities attached to the flame retardant disc are removed by fresh water, viscous impurities in the flame retardant disc are removed by high-temperature steam again, and finally, purging of a pipeline and inspection of a descaling effect are completed by nitrogen; the descaling efficiency of the flame arrester of the device can be effectively improved, the construction risk of operators is reduced, and the process safety and the effect are ensured to be reliable. The method belongs to a disassembly-free cleaning and descaling method of a flame arrester, and is particularly applied to the flame arrester for conveying a gas pipeline containing VOCs (volatile organic compounds), the flame arrester is automatically cleaned and descaled by cleaning media such as system fresh water, high-pressure steam and the like, and finally the cleaning effect of the flame arrester is judged by a nitrogen purging self-checking system.
Drawings
FIG. 1 is a schematic diagram of a system for online closed cleaning and detection of flame arrestors.
Wherein ST-1001 is a flame arrester; PDT is a differential pressure meter; v-1 is a first cut-off valve, V-2 is a second cut-off valve, V-3 is a third cut-off valve, V-4 is a fourth cut-off valve, V-5 is a fifth cut-off valve, V-6 is a sixth cut-off valve, V-7 is a seventh cut-off valve, V-8 is an eighth cut-off valve, and V-9 is a ninth cut-off valve.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
referring to fig. 1, the online closed cleaning and detecting system for the flame arrester comprises a flame arrester, a first cut-off valve, a combustible gas inlet, a second cut-off valve and a combustible gas outlet, wherein an inlet pipeline of the flame arrester is connected with the combustible gas inlet through the first cut-off valve, and an outlet pipeline of the flame arrester is connected with the combustible gas outlet through the second cut-off valve;
the fire arrestor is characterized by further comprising a third stop valve, a fourth stop valve, a differential pressure gauge, a fifth stop valve, a water pipe network and an oily sewage outlet, wherein the inlet pipeline and the outlet pipeline of the fire arrestor are connected with the differential pressure gauge through the third stop valve and the fourth stop valve respectively; an outlet pipeline of the flame arrester is connected with a water pipe network through a fifth cut-off valve; the bottom of the fire arrester is provided with a condensation discharge port connected with the oily sewage outlet.
As one of the embodiments, further, the steam cylinder and a sixth stop valve are included, and the outlet pipe line of the flame arrester is connected with the steam cylinder through the sixth stop valve.
As one of the embodiments, further, a nitrogen tank and an eighth shut-off valve are further included, and an inlet line of the flame arrester is connected to the nitrogen tank through the eighth shut-off valve.
As an example, there are two condensation discharge openings, including a first condensation discharge opening and a second condensation discharge opening, which are respectively disposed at two ends of the bottom of the flame arrester.
As an embodiment, the system further comprises a first sewage discharge pipeline and a second sewage discharge pipeline, wherein the first condensation discharge port and the second condensation discharge port are respectively connected with the oily sewage outlet through the first sewage discharge pipeline and the second sewage discharge pipeline.
As one embodiment, the sewage treatment device further comprises a seventh stop valve and a ninth stop valve, wherein the seventh stop valve and the ninth stop valve are respectively arranged on the first sewage draining pipeline and the second sewage draining pipeline.
A process method for online closed cleaning and detection of a flame arrester is implemented based on the online closed cleaning and detection system for the flame arrester, and comprises the following steps:
(1) when the flame arrester normally works, the first cut-off valve, the second cut-off valve, the third cut-off valve and the fourth cut-off valve are normally opened; the fifth cut-off valve, the sixth cut-off valve, the seventh cut-off valve, the eighth cut-off valve and the ninth cut-off valve are normally closed; the differential pressure gauge measures the differential pressure before and after the flame arrester in real time;
entering a cleaning process when the differential pressure measured by the differential pressure gauge reaches an alarm value;
(2) the cleaning process comprises a water washing process;
when the water is washed, the first cut-off valve, the second cut-off valve, the third cut-off valve and the fourth cut-off valve are closed, the fifth cut-off valve and the seventh cut-off valve are opened, water in the water pipe network is reversely injected into the cavity of the flame arrester, and large-particle attachments on the fire resisting disc are flushed away by the water and then are discharged to an oily sewage outlet through the seventh cut-off valve, so that the large-particle attachments are discharged to the outside of the system.
As an embodiment, further, the cleaning process further includes a steam purge process;
when steam purging is performed, the first cut-off valve, the second cut-off valve, the third cut-off valve and the fourth cut-off valve are closed, the eighth cut-off valve and the ninth cut-off valve are closed, and the fifth cut-off valve is closed; and the seventh cut-off valve is opened, the sixth cut-off valve is opened, steam in the steam tank is reversely injected into the cavity of the flame arrester, and the sticky attachments attached to the flame-retardant disc are heated and blown by the steam and then discharged to the oily sewage outlet through the seventh cut-off valve, so that the sticky attachments are discharged out of the system.
As an embodiment, the cleaning process further includes a nitrogen purge process;
when nitrogen is blown, the first cut-off valve, the second cut-off valve and the fifth cut-off valve are closed; the sixth cut-off valve and the seventh cut-off valve are closed; and opening a third stop valve, a fourth stop valve, an eighth stop valve and a ninth stop valve, reducing the pressure of the nitrogen through the eighth stop valve, then entering a flame arrester cavity, and discharging the nitrogen to an oily sewage outlet through the ninth stop valve so as to discharge the nitrogen to the outside of the system.
As one example, further, during nitrogen purging, a differential pressure gauge measures a differential pressure before and after the flame arrester, and if the differential pressure value of the differential pressure gauge does not meet a set value, the cleaning process is continuously repeated; if the differential pressure value of the differential pressure gauge meets a set value, the flame arrester is washed to be qualified, the cleaning process of the flame arrester is completed, the eighth cut-off valve and the ninth cut-off valve are closed, the first cut-off valve and the second cut-off valve are opened, the system is recovered to be normal, and the flame arrester enters into normal work.
Example 1
(1) When the flame arrester normally works, the first cut-off valve, the second cut-off valve, the third cut-off valve and the fourth cut-off valve are normally opened; the fifth cut-off valve, the sixth cut-off valve, the seventh cut-off valve, the eighth cut-off valve and the ninth cut-off valve are normally closed;
under normal operating mode, combustible gas gets into the spark arrester through first shut-off valve, and combustible gas flows outside the system by the second shut-off valve behind the spark arrester.
The differential pressure gauge measures the differential pressure before and after the flame arrester in real time; entering a cleaning and descaling process when the differential pressure measured by the differential pressure gauge reaches an alarm value;
(2) the cleaning and descaling process comprises a water washing process, a steam purging process and a nitrogen purging process;
a. when the water enters the water flushing section, the first cut-off valve, the second cut-off valve, the third cut-off valve and the fourth cut-off valve are closed, and the sixth cut-off valve, the eighth cut-off valve and the ninth cut-off valve are kept closed;
and (3) opening a fifth cut-off valve and a seventh cut-off valve, reversely injecting water in the water pipe network into the cavity of the flame arrester, flushing large-particle attachments on the flame-retardant disc away by water, and then discharging the large-particle attachments to an oily sewage outlet through the seventh cut-off valve to be discharged outside the system.
b. After the water washing working section is finished, the steam purging working section is started, and at the moment, the first cut-off valve, the second cut-off valve, the third cut-off valve, the fourth cut-off valve, the eighth cut-off valve and the ninth cut-off valve are kept in a closed state; closing the fifth cut-off valve; the seventh cut-off valve keeps an open state;
and (4) opening the sixth cut-off valve, reversely injecting steam in the steam tank into the cavity of the flame arrester, heating and blowing the adhered viscous attachments on the fire-blocking plate by the steam, and then discharging the heated and blown adhesive attachments to an oily sewage outlet through the seventh cut-off valve so as to discharge the heated and blown adhesive attachments to the outside of the system.
c. After the steam purging working section is finished, the nitrogen purging working section is started, and at the moment, the first cut-off valve, the second cut-off valve and the fifth cut-off valve are kept in a closed state; closing the sixth cut-off valve and the seventh cut-off valve;
and opening a third stop valve, a fourth stop valve, an eighth stop valve and a ninth stop valve, reducing the pressure of the nitrogen through the eighth stop valve, then entering a flame arrester cavity, and discharging the nitrogen to an oily sewage outlet through the ninth stop valve so as to discharge the nitrogen to the outside of the system.
Thus completing one cleaning and descaling operation.
d. The differential pressure gauge measures the front and back differential pressure of the flame arrester, and if the differential pressure value of the differential pressure gauge does not meet a set value, the cleaning process is continuously repeated;
if the differential pressure value of the differential pressure gauge meets a set value, the flame arrester is qualified in cleaning, the eighth cut-off valve and the ninth cut-off valve are closed, the first cut-off valve and the second cut-off valve are opened, the system is recovered to be normal, and the flame arrester enters normal work. And finishing the functions of online closed cleaning of the flame arrester and self-checking of the state of the cleaned flame arrester.
Example 2
The differential pressure gauge measures the differential pressure before and after the flame arrester in real time; entering a cleaning and descaling process when the differential pressure measured by the differential pressure gauge reaches an alarm value; compared with the embodiment 1, the method lacks a steam purging process, and directly enters a nitrogen purging working section after the water flushing working section is finished.
The first cut-off valve, the second cut-off valve, the fifth cut-off valve, the sixth cut-off valve and the seventh cut-off valve are closed; and opening a third stop valve, a fourth stop valve, an eighth stop valve and a ninth stop valve, reducing the pressure of the nitrogen through the eighth stop valve, then entering a flame arrester cavity, and discharging the nitrogen to an oily sewage outlet through the ninth stop valve so as to discharge the nitrogen to the outside of the system.
The differential pressure gauge measures the front and back differential pressure of the flame arrester, and if the differential pressure value of the differential pressure gauge does not meet a set value, the cleaning process is continuously repeated;
if the differential pressure value of the differential pressure gauge meets a set value, the flame arrester is qualified in cleaning, the eighth cut-off valve and the ninth cut-off valve are closed, the first cut-off valve and the second cut-off valve are opened, the system is recovered to be normal, and the flame arrester enters normal work. And finishing the functions of online closed cleaning of the flame arrester and self-checking of the state of the cleaned flame arrester.
Example 3
The differential pressure gauge measures the differential pressure before and after the flame arrester in real time; entering a cleaning and descaling process when the differential pressure measured by the differential pressure gauge reaches an alarm value; compared to example 1, only a water rinse process was included.
Closing the first cut-off valve, the second cut-off valve, the third cut-off valve and the fourth cut-off valve, and keeping the sixth cut-off valve, the eighth cut-off valve and the ninth cut-off valve in a closed state;
and (3) opening a fifth cut-off valve and a seventh cut-off valve, reversely injecting water in the water pipe network into the cavity of the flame arrester, flushing large-particle attachments on the flame-retardant disc away by water, and then discharging the large-particle attachments to an oily sewage outlet through the seventh cut-off valve to be discharged outside the system.
After washing with water for a certain time, opening a first cut-off valve, a second cut-off valve, a third cut-off valve and a fourth cut-off valve; closing the fifth cut-off valve, the sixth cut-off valve, the seventh cut-off valve, the eighth cut-off valve and the ninth cut-off valve;
combustible gas enters the flame arrester through the first cut-off valve, and the combustible gas flows out of the system through the second cut-off valve after passing through the flame arrester. The differential pressure gauge measures the differential pressure before and after the flame arrester in real time; if the differential pressure value of the differential pressure gauge does not meet the set value, the water washing process is continuously repeated; if the differential pressure value of the differential pressure gauge meets a set value, the flame arrester is qualified in cleaning, the system is recovered to be normal, and the flame arrester enters normal work. And finishing the functions of online closed cleaning of the flame arrester and self-checking of the state of the cleaned flame arrester.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (10)
1. The system for online airtight cleaning and detection of the flame arrester comprises a flame arrester, a first cut-off valve, a combustible gas inlet, a second cut-off valve and a combustible gas outlet, wherein an inlet pipeline of the flame arrester is connected with the combustible gas inlet through the first cut-off valve, an outlet pipeline of the flame arrester is connected with the combustible gas outlet through the second cut-off valve, and the system is characterized by further comprising a third cut-off valve, a fourth cut-off valve, a differential pressure gauge, a fifth cut-off valve, a water pipe network and an oily sewage outlet, wherein the inlet pipeline and the outlet pipeline of the flame arrester are connected with the differential pressure gauge through the third cut-off valve and the fourth cut-off valve respectively; an outlet pipeline of the flame arrester is connected with a water pipe network through a fifth cut-off valve; the bottom of the fire arrester is provided with a condensation discharge port connected with the oily sewage outlet.
2. The system for online closed cleaning and detection of flame arresters as claimed in claim 1, further comprising a steam drum and a sixth shut-off valve, the outlet line of the flame arrester being connected to the steam drum via the sixth shut-off valve.
3. The system for online closed cleaning and detection of the flame arrester as claimed in claim 2, further comprising a nitrogen tank and an eighth shut-off valve, wherein the inlet line of the flame arrester is connected with the nitrogen tank through the eighth shut-off valve.
4. The system for online closed cleaning and detection of the flame arrester as claimed in claim 3, wherein the two condensation discharge openings comprise a first condensation discharge opening and a second condensation discharge opening, which are respectively arranged at two ends of the bottom of the flame arrester.
5. The system for online closed cleaning and detection of a flame arrester as claimed in claim 4, further comprising a first and a second blowdown line, wherein the first and second drain and trap are connected to the oily sewage outlet via the first and second blowdown lines, respectively.
6. The system for online closed cleaning and detection of the flame arrester as claimed in claim 5, further comprising a seventh cut-off valve and a ninth cut-off valve, wherein the seventh cut-off valve and the ninth cut-off valve are respectively disposed on the first sewage drain line and the second sewage drain line.
7. A process method for online closed cleaning and detection of a flame arrester, which is implemented on the basis of the system for online closed cleaning and detection of a flame arrester as claimed in claim 6, is characterized by comprising the following steps:
(1) when the flame arrester normally works, the first cut-off valve, the second cut-off valve, the third cut-off valve and the fourth cut-off valve are normally opened; the fifth cut-off valve, the sixth cut-off valve, the seventh cut-off valve, the eighth cut-off valve and the ninth cut-off valve are normally closed; the differential pressure gauge measures the differential pressure before and after the flame arrester in real time;
entering a cleaning process when the differential pressure measured by the differential pressure gauge reaches an alarm value;
(2) the cleaning process comprises a water washing process;
when the water is washed, the first cut-off valve, the second cut-off valve, the third cut-off valve and the fourth cut-off valve are closed, the fifth cut-off valve and the seventh cut-off valve are opened, water in the water pipe network is reversely injected into the cavity of the flame arrester, and large-particle attachments on the fire resisting disc are flushed away by the water and then are discharged to an oily sewage outlet through the seventh cut-off valve, so that the large-particle attachments are discharged to the outside of the system.
8. The process method for the online closed cleaning and detection of the flame arrester as claimed in claim 7, wherein the cleaning process further comprises a steam purging process;
when steam purging is performed, the first cut-off valve, the second cut-off valve, the third cut-off valve and the fourth cut-off valve are closed, the eighth cut-off valve and the ninth cut-off valve are closed, and the fifth cut-off valve is closed; and the seventh cut-off valve is opened, the sixth cut-off valve is opened, steam in the steam tank is reversely injected into the cavity of the flame arrester, and the sticky attachments attached to the flame-retardant disc are heated and blown by the steam and then discharged to the oily sewage outlet through the seventh cut-off valve, so that the sticky attachments are discharged out of the system.
9. The process method for the online closed cleaning and detection of the flame arrester as claimed in claim 7 or 8, wherein the cleaning process further comprises a nitrogen purging process;
when nitrogen is blown, the first cut-off valve, the second cut-off valve and the fifth cut-off valve are closed; the sixth cut-off valve and the seventh cut-off valve are closed; and opening a third stop valve, a fourth stop valve, an eighth stop valve and a ninth stop valve, reducing the pressure of the nitrogen through the eighth stop valve, then entering a flame arrester cavity, and discharging the nitrogen to an oily sewage outlet through the ninth stop valve so as to discharge the nitrogen to the outside of the system.
10. The process method for online closed cleaning and detection of the flame arrester as claimed in claim 9, wherein during nitrogen purging, the differential pressure gauge measures the differential pressure before and after the flame arrester, and if the differential pressure value of the differential pressure gauge does not meet a set value, the cleaning process is repeated; if the differential pressure value of the differential pressure gauge meets a set value, the flame arrester is washed to be qualified, the cleaning process of the flame arrester is completed, the eighth cut-off valve and the ninth cut-off valve are closed, the first cut-off valve and the second cut-off valve are opened, the system is recovered to be normal, and the flame arrester enters into normal work.
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| CN202010094890.2A CN111167771B (en) | 2020-02-17 | 2020-02-17 | System and process method for online airtight cleaning and detection of flame arresters |
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| CN111167771B CN111167771B (en) | 2023-06-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111921996A (en) * | 2020-07-27 | 2020-11-13 | 烽火通信科技股份有限公司 | Online cleaning system and method suitable for OVD deposition equipment |
| CN113118149A (en) * | 2021-04-23 | 2021-07-16 | 中国海洋石油集团有限公司 | Disassembly-free online self-cleaning system and method for pipeline equipment |
| CN114112451A (en) * | 2020-09-01 | 2022-03-01 | 中国石油化工股份有限公司 | Flame arrester testing method and system |
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