CN111167771B - System and process method for online airtight cleaning and detection of flame arresters - Google Patents
System and process method for online airtight cleaning and detection of flame arresters Download PDFInfo
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- CN111167771B CN111167771B CN202010094890.2A CN202010094890A CN111167771B CN 111167771 B CN111167771 B CN 111167771B CN 202010094890 A CN202010094890 A CN 202010094890A CN 111167771 B CN111167771 B CN 111167771B
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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 detection of flame arresters, and provides a system and a process method for online airtight cleaning and detection of flame arresters. After the flame arrester is blocked, the scale removal problem of the flame arrester can be effectively solved without dismantling the flame arrester; according to the process route, by utilizing the characteristic of impurities which cause blockage in the flame arrester, through a reasonable design cleaning sequence, firstly, large-particle impurities attached to a flame retardant plate are removed by utilizing fresh water, viscous impurities in the flame retardant plate are removed again by utilizing high-temperature steam, and finally, purging of a pipeline and inspection of a descaling effect are completed by utilizing nitrogen; through the design of the process flow, the on-line airtight cleaning and the self-checking function of the state after cleaning of the flame arrester 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 safety and the reliability of the process 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 airtight cleaning and detection of flame arresters.
Background
The pipeline for conveying combustible gas of refining enterprises is required to be provided with a flame arrester according to standard requirements, when more impurities are conveyed in the gas, the flame arrester is extremely easy to block (for example, a gas-phase pipeline flame arrester of an original oil tank, a sewage oil tank and a middle oil tank), the blocking of the flame arrester causes unsmooth fluid circulation of a pipeline, and the pressure difference of the flame arrester is particularly increased. The only way current refining enterprises solve the blockage of flame arresters is to remove the flame arresters and then clean the flame arresters by a maintenance unit.
Because the steel strip gap of the fire-retardant plate is very small, the blocking phenomenon of the fire-retardant device mainly occurs in the first fire-retardant plate facing the wind. 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 if necessary. Because manual cleaning is large in disassembly workload, potential safety hazards exist during operation of media such as water and steam used during flushing, manual cleaning effects cannot be detected in real time, and actual purging effects cannot be guaranteed.
Disclosure of Invention
Aiming at the problems that disassembly and assembly are time-consuming and labor-consuming, safety risks exist in the cleaning process, the cleaning effect cannot be checked and the like in the conventional cleaning of the organic gas flame arresters in a refinery, the invention designs the system and the process for online airtight cleaning and detection of the flame arresters, which can avoid the problem that the flame arresters can be cleaned by removing the flame arresters, and reduce the construction risks of operators.
The invention adopts the following technical scheme:
the system 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 arrester further comprises a third cut-off valve, a fourth cut-off valve, a differential pressure meter, a fifth cut-off valve, a water pipe network and an oily sewage outlet, wherein the third cut-off valve and the fourth cut-off valve are respectively connected with the differential pressure meter between an inlet pipeline and an outlet pipeline of the fire arrester; the outlet pipeline of the flame arrester is connected with the water pipe network through a fifth cut-off valve; the bottom of the flame arrester is provided with a condensation outlet connected with an oily sewage outlet.
Further, the fire arrestor also comprises a steam tank and a sixth cut-off valve, wherein an outlet pipeline of the fire arrestor is connected with the steam tank through the sixth cut-off valve.
Further, the device also comprises a nitrogen tank and an eighth cut-off valve, wherein an inlet pipeline of the flame arrester is connected with the nitrogen tank through the eighth cut-off valve.
Further, the two discharging condensation ports comprise a first discharging condensation port and a second discharging condensation port, and the two discharging condensation ports are respectively arranged at two ends of the bottom of the flame arrester.
Further, the sewage treatment device also comprises a first sewage drain pipeline and a second sewage drain pipeline, wherein the first condensate drain port and the second condensate drain port are connected with the oily sewage outlet through the first sewage drain pipeline and the second sewage drain pipeline respectively.
Further, a seventh shut-off valve and a ninth shut-off valve are also included, which are disposed on the first drain line and the second drain line, respectively.
The technical method for on-line airtight cleaning and detection of the flame arrester is implemented based on the system for on-line airtight cleaning and detection of the flame arrester, and comprises the following steps of:
(1) When the fire arrestor works normally, the first cut-off valve, the second cut-off valve, the third cut-off valve and the fourth cut-off valve are normally open; 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 meter measures the pressure difference of the front and the rear of the flame arrester in real time;
when the pressure difference measured by the pressure difference meter reaches an alarm value, a cleaning process is carried out;
(2) The cleaning process comprises a water flushing process;
when water is flushed, 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 fire arrestor, and large particle attachments on the fire arrestor are flushed by the water and then discharged to an oily sewage outlet through the seventh cut-off valve, so that the oily sewage is discharged out of the system.
Further, the cleaning process also comprises a steam purging process;
during steam purging, the first shut-off valve, the second shut-off valve, the third shut-off valve and the fourth shut-off valve are closed, the eighth shut-off valve and the ninth shut-off valve are closed, and the fifth shut-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 viscous attachments attached to the flame arrester are heated and purged by the steam and then discharged to an oily sewage outlet through the seventh cut-off valve, so that the viscous attachments are discharged outside the system.
Further, the cleaning process also comprises a nitrogen purging process;
during nitrogen purging, the first shut-off valve, the second shut-off valve and the fifth shut-off valve are closed; the sixth shut-off valve and the seventh shut-off valve are closed; and opening a third cut-off valve, a fourth cut-off valve, an eighth cut-off valve and a ninth cut-off valve, decompressing by the eighth cut-off valve, and then enabling nitrogen to enter the cavity of the flame arrester, and discharging the nitrogen to an oily sewage outlet through the ninth cut-off valve, so that the nitrogen is discharged outside the system.
Further, when nitrogen is purged, the pressure difference meter measures the pressure difference between the front and the rear of the flame arrester, and if the pressure difference value of the pressure difference meter does not meet a set value, the cleaning process is continuously repeated; if the pressure difference value of the pressure difference meter meets the set value, the fire arrestor is cleaned qualified, the cleaning process of the fire arrestor is finished, 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 fire arrestor enters normal operation.
The invention has the beneficial effects that:
the online airtight descaling and detection method has the advantages that after the flame arrester is blocked, the descaling problem of the flame arrester can be effectively solved without dismantling the flame arrester; according to the process route, by utilizing the characteristic of impurities which cause blockage in the flame arrester, through a reasonable design cleaning sequence, firstly, large-particle impurities attached to a flame retardant plate are removed by utilizing fresh water, viscous impurities in the flame retardant plate are removed again by utilizing high-temperature steam, and finally, purging of a pipeline and inspection of a descaling effect are completed by utilizing nitrogen; can effectively improve the descaling efficiency of the flame arrester of the device, reduce the construction risk of operators, and ensure the safety and the reliable effect of the process. The disassembly-free cleaning and descaling method belongs to a flame arrester, is particularly applied to the flame arrester for conveying a gas pipeline containing VOCs, automatically cleans and removes scale on the flame arrester through cleaning mediums such as fresh water, high-pressure steam and the like of a system, and finally judges the cleaning effect of the flame arrester through a nitrogen purging self-checking system.
Drawings
FIG. 1 is a schematic diagram of a system for on-line closed cleaning and detection of a flame arrester.
Wherein ST-1001 is a flame arrestor; PDT is a differential pressure meter; v-1 is a first shut-off valve, V-2 is a second shut-off valve, V-3 is a third shut-off valve, V-4 is a fourth shut-off valve, V-5 is a fifth shut-off valve, V-6 is a sixth shut-off valve, V-7 is a seventh sixth shut-off valve, V-8 is an eighth shut-off valve, and V-9 is a ninth shut-off valve.
Detailed Description
The invention is described in detail below with reference to the attached drawings:
referring to fig. 1, a system for on-line closed cleaning and detection of a flame arrester includes a flame arrester, a first shut-off valve, a combustible gas inlet, a second shut-off valve, and a combustible gas outlet, wherein an inlet line of the flame arrester is connected with the combustible gas inlet through the first shut-off valve, and an outlet line of the flame arrester is connected with the combustible gas outlet through the second shut-off valve;
the fire arrester further comprises a third cut-off valve, a fourth cut-off valve, a differential pressure meter, a fifth cut-off valve, a water pipe network and an oily sewage outlet, wherein the third cut-off valve and the fourth cut-off valve are respectively connected with the differential pressure meter between an inlet pipeline and an outlet pipeline of the fire arrester; the outlet pipeline of the flame arrester is connected with the water pipe network through a fifth cut-off valve; the bottom of the flame arrester is provided with a condensation outlet connected with an oily sewage outlet.
As one embodiment, further comprising a steam tank and a sixth shut-off valve, the outlet line of the flame arrester is connected to the steam tank through the sixth shut-off valve.
As one embodiment, the device further comprises a nitrogen tank and an eighth shut-off valve, wherein the inlet pipeline of the flame arrester is connected with the nitrogen tank through the eighth shut-off valve.
As one embodiment, further, the two discharging condensation ports comprise a first discharging condensation port and a second discharging condensation port, which are respectively arranged at two ends of the bottom of the flame arrester.
As one embodiment thereof, further comprising a first drain line and a second drain line, the first drain and the second drain being connected to the oily wastewater outlet by the first drain line and the second drain line, respectively.
As one embodiment thereof, further comprising a seventh shut-off valve and a ninth shut-off valve, which are provided on the first drain line and the second drain line, respectively.
The technical method for on-line airtight cleaning and detection of the flame arrester is implemented based on the system for on-line airtight cleaning and detection of the flame arrester, and comprises the following steps of:
(1) When the fire arrestor works normally, the first cut-off valve, the second cut-off valve, the third cut-off valve and the fourth cut-off valve are normally open; 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 meter measures the pressure difference of the front and the rear of the flame arrester in real time;
when the pressure difference measured by the pressure difference meter reaches an alarm value, a cleaning process is carried out;
(2) The cleaning process comprises a water flushing process;
when water is flushed, 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 fire arrestor, and large particle attachments on the fire arrestor are flushed by the water and then discharged to an oily sewage outlet through the seventh cut-off valve, so that the oily sewage is discharged out of the system.
As one embodiment, further, the cleaning process further comprises a steam purge process;
during steam purging, the first shut-off valve, the second shut-off valve, the third shut-off valve and the fourth shut-off valve are closed, the eighth shut-off valve and the ninth shut-off valve are closed, and the fifth shut-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 viscous attachments attached to the flame arrester are heated and purged by the steam and then discharged to an oily sewage outlet through the seventh cut-off valve, so that the viscous attachments are discharged outside the system.
As one embodiment, further, the cleaning process further comprises a nitrogen purge process;
during nitrogen purging, the first shut-off valve, the second shut-off valve and the fifth shut-off valve are closed; the sixth shut-off valve and the seventh shut-off valve are closed; and opening a third cut-off valve, a fourth cut-off valve, an eighth cut-off valve and a ninth cut-off valve, decompressing by the eighth cut-off valve, and then enabling nitrogen to enter the cavity of the flame arrester, and discharging the nitrogen to an oily sewage outlet through the ninth cut-off valve, so that the nitrogen is discharged outside the system.
As one embodiment, further, when nitrogen is purged, the pressure difference meter measures the pressure difference before and after the flame arrester, if the pressure difference value of the pressure difference meter does not meet the set value, the cleaning process is continuously repeated; if the pressure difference value of the pressure difference meter meets the set value, the fire arrestor is cleaned qualified, the cleaning process of the fire arrestor is finished, 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 fire arrestor enters normal operation.
Example 1
(1) When the fire arrestor works normally, the first cut-off valve, the second cut-off valve, the third cut-off valve and the fourth cut-off valve are normally open; 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 working conditions, the combustible gas enters the flame arrester through the first cut-off valve, and flows out of the system through the second cut-off valve after passing through the flame arrester.
The differential pressure meter measures the pressure difference of the front and the rear of the flame arrester in real time; when the pressure difference measured by the pressure difference meter reaches an alarm value, the cleaning and descaling process is carried out;
(2) The cleaning and descaling process comprises a water flushing process, a steam purging process and a nitrogen purging process;
a. the water flushing working section is entered, at the moment, 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 in a closed state;
and 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 fire arrestor, flushing large-particle attachments on the fire arrestor by the water, and discharging the large-particle attachments to an oily sewage outlet through the seventh cut-off valve, so as to discharge the attachments out of the system.
b. After the water flushing working section is finished, the water flushing working section enters a steam purging working section, 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 shut-off valve; the seventh cut-off valve is kept in an open state;
and opening a sixth cut-off valve, reversely injecting steam in the steam tank into the cavity of the flame arrester, heating and blowing the viscous attachments attached to the flame arrester disk by the steam, and discharging the viscous attachments to an oily sewage outlet through a seventh cut-off valve, so as to discharge the viscous attachments out of the system.
c. After the steam purging working section is finished, entering a nitrogen purging working section, wherein 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 shut-off valve and the seventh shut-off valve;
and opening a third cut-off valve, a fourth cut-off valve, an eighth cut-off valve and a ninth cut-off valve, decompressing by the eighth cut-off valve, and then enabling nitrogen to enter the cavity of the flame arrester, and discharging the nitrogen to an oily sewage outlet through the ninth cut-off valve, so that the nitrogen is discharged outside the system.
Thus, the cleaning and descaling operation is completed once.
d. The differential pressure meter measures the front and rear differential pressure of the flame arrester, and if the differential pressure value of the differential pressure meter does not meet a set value, the cleaning process is continuously repeated;
if the pressure difference value of the pressure difference meter meets a set value, the fire arrestor is qualified to be cleaned, 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 fire arrestor enters normal operation. And the on-line airtight cleaning and the self-checking function of the cleaned state of the flame arrester are completed.
Example 2
The differential pressure meter measures the pressure difference of the front and the rear of the flame arrester in real time; when the pressure difference measured by the pressure difference meter reaches an alarm value, the cleaning and descaling process is carried out; in contrast to example 1, the water rinse section was ended and directly entered the nitrogen purge section in the absence of a steam purge process.
The first shut-off valve, the second shut-off valve, the fifth shut-off valve, the sixth shut-off valve and the seventh shut-off valve are closed; and opening a third cut-off valve, a fourth cut-off valve, an eighth cut-off valve and a ninth cut-off valve, decompressing by the eighth cut-off valve, and then enabling nitrogen to enter the cavity of the flame arrester, and discharging the nitrogen to an oily sewage outlet through the ninth cut-off valve, so that the nitrogen is discharged outside the system.
The differential pressure meter measures the front and rear differential pressure of the flame arrester, and if the differential pressure value of the differential pressure meter does not meet a set value, the cleaning process is continuously repeated;
if the pressure difference value of the pressure difference meter meets a set value, the fire arrestor is qualified to be cleaned, 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 fire arrestor enters normal operation. And the on-line airtight cleaning and the self-checking function of the cleaned state of the flame arrester are completed.
Example 3
The differential pressure meter measures the pressure difference of the front and the rear of the flame arrester in real time; when the pressure difference measured by the pressure difference meter reaches an alarm value, the cleaning and descaling process is carried out; in contrast to example 1, only a water rinse process was included.
Closing the first shut-off valve, the second shut-off valve, the third shut-off valve and the fourth shut-off valve, and keeping the sixth shut-off valve, the eighth shut-off valve and the ninth shut-off valve in a closed state;
and 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 fire arrestor, flushing large-particle attachments on the fire arrestor by the water, and discharging the large-particle attachments to an oily sewage outlet through the seventh cut-off valve, so as to discharge the attachments out of the system.
After washing 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; the fifth shut-off valve, the sixth shut-off valve, the seventh shut-off valve, the eighth shut-off valve, and the ninth shut-off valve are closed;
the combustible gas enters the flame arrester through the first cut-off valve, and flows out of the system through the second cut-off valve after passing through the flame arrester. The differential pressure meter measures the pressure difference of the front and the rear of the flame arrester in real time; if the differential pressure value of the differential pressure meter does not meet the set value, continuing to repeat the water flushing process; if the pressure difference value of the pressure difference meter meets the set value, the fire arrestor is qualified to clean, the system is recovered to be normal, and the fire arrestor enters normal operation. And the on-line airtight cleaning and the self-checking function of the cleaned state of the flame arrester are completed.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (2)
1. The technical method for online airtight cleaning and detection of the flame arresters is characterized by comprising a system for online airtight cleaning and detection of the flame arresters, wherein the system comprises the flame arresters, a first cut-off valve, a combustible gas inlet, a second cut-off valve and a combustible gas outlet, an inlet pipeline of the flame arresters is connected with the combustible gas inlet through the first cut-off valve, an outlet pipeline of the flame arresters is connected with the combustible gas outlet through the second cut-off valve, and the technical method is characterized by further comprising a third cut-off valve, a fourth cut-off valve, a differential pressure meter, a fifth cut-off valve, a water pipe network and an oily sewage outlet, wherein the differential pressure meter is respectively connected between the inlet pipeline and the outlet pipeline of the flame arresters through the third cut-off valve and the fourth cut-off valve; the outlet pipeline of the flame arrester is connected with the water pipe network through a fifth cut-off valve; the bottom of the flame arrester is provided with a condensation outlet connected with an oily sewage outlet; the two discharge condensation ports comprise a first discharge condensation port and a second discharge condensation port, the first discharge condensation port and the second discharge condensation port are respectively arranged at two ends of the bottom of the flame arrester, the first discharge condensation port is arranged at the left end of the bottom of the flame arrester, and the second discharge condensation port is arranged at the right end of the bottom of the flame arrester;
the fire arrester also comprises a steam tank and a sixth cut-off valve, wherein an outlet pipeline of the fire arrester is connected with the steam tank through the sixth cut-off valve;
the fire arrester also comprises a nitrogen tank and an eighth cut-off valve, wherein an inlet pipeline of the fire arrester is connected with the nitrogen tank through the eighth cut-off valve;
the system also comprises a first drain pipeline and a second drain pipeline, wherein the first drain condensation port and the second drain condensation port are respectively connected with the oily sewage outlet through the first drain pipeline and the second drain pipeline;
the system further comprises a seventh shut-off valve and a ninth shut-off valve, wherein the seventh shut-off valve and the ninth shut-off valve are respectively arranged on the first sewage drain pipeline and the second sewage drain pipeline;
the technological method for on-line airtight cleaning and detection of flame arresters comprises the following steps:
(1) When the fire arrestor works normally, the first cut-off valve, the second cut-off valve, the third cut-off valve and the fourth cut-off valve are normally open; 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 meter measures the pressure difference of the front and the rear of the flame arrester in real time;
when the pressure difference measured by the pressure difference meter reaches an alarm value, a cleaning process is carried out;
(2) The cleaning process comprises a water flushing process;
when water flushing 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 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 fire arrestor, and large particle attachments on the fire arrestor disk are discharged to an oily sewage outlet through the seventh cut-off valve after being flushed by the water, so that the large particle attachments are discharged outside the system;
the cleaning process further comprises a steam purging process;
during steam purging, the first shut-off valve, the second shut-off valve, the third shut-off valve and the fourth shut-off valve are closed, the eighth shut-off valve and the ninth shut-off valve are closed, and the fifth shut-off valve is closed; 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 viscous attachments attached to the flame arrester disk are heated and purged by the steam and then discharged to an oily sewage outlet through the seventh cut-off valve, so that the viscous attachments are discharged to the outside of the system;
the cleaning process also comprises a nitrogen purging process;
during nitrogen purging, the first shut-off valve, the second shut-off valve and the fifth shut-off valve are closed; the sixth shut-off valve and the seventh shut-off valve are closed; and opening a third cut-off valve, a fourth cut-off valve, an eighth cut-off valve and a ninth cut-off valve, decompressing by the eighth cut-off valve, and then enabling nitrogen to enter the cavity of the flame arrester, and discharging the nitrogen to an oily sewage outlet through the ninth cut-off valve, so that the nitrogen is discharged outside the system.
2. The process method for online airtight cleaning and detection of a flame arrester according to claim 1, wherein the pressure difference meter measures the pressure difference before and after the flame arrester when nitrogen is purged, and if the pressure difference value of the pressure difference meter does not meet a set value, the cleaning process is continuously repeated; if the pressure difference value of the pressure difference meter meets the set value, the fire arrestor is cleaned qualified, the cleaning process of the fire arrestor is finished, 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 fire arrestor enters normal operation.
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| 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 |
| 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 |
| CN113118149B (en) * | 2021-04-23 | 2022-10-14 | 中国海洋石油集团有限公司 | Disassembly-free online self-cleaning system and method for pipeline equipment |
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