CN111174097A - Fire retardant system with dredging function and use method thereof - Google Patents
Fire retardant system with dredging function and use method thereof Download PDFInfo
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- CN111174097A CN111174097A CN202010124588.7A CN202010124588A CN111174097A CN 111174097 A CN111174097 A CN 111174097A CN 202010124588 A CN202010124588 A CN 202010124588A CN 111174097 A CN111174097 A CN 111174097A
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000010926 purge Methods 0.000 claims abstract description 112
- 238000007664 blowing Methods 0.000 claims description 26
- 229920006395 saturated elastomer Polymers 0.000 claims description 7
- 230000000979 retarding effect Effects 0.000 claims 2
- 238000010408 sweeping Methods 0.000 abstract description 12
- 230000008676 import Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 298
- 230000002000 scavenging effect Effects 0.000 description 56
- 239000011521 glass Substances 0.000 description 8
- 229910001220 stainless steel Inorganic materials 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical group N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
- A62C4/02—Flame traps allowing passage of gas but not of flame or explosion wave in gas-pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0325—Control mechanisms therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention relates to a fire retardant system with a dredging function and a use method thereof, wherein the fire retardant system with the dredging function comprises a tail gas conveying unit, a sweeping gas conveying unit, a fire retardant unit, a sweeping gas collecting unit and a tail gas collecting unit; the tail gas conveying unit and the purge gas conveying unit are respectively and independently connected with an air inlet of the fire retardant unit; the sweep gas collection unit and the tail gas collection unit are respectively and independently connected with the gas outlet of the fire retardant unit. The fire retardant system with the dredging function is simple in structure, the fire retardant device is dredged through switching of the valve, and equipment cost is low; the fire retardant system with dredging function can be through designing multiunit parallel connection's spark arrester to set up independently respectively and import and export the pipeline, can make tail gas treatment go on in succession, improved the efficiency of tail gas treatment.
Description
Technical Field
The invention belongs to the technical field of explosion prevention, relates to a fire retardant system and a using method thereof, and particularly relates to a fire retardant system with a dredging function and a using method thereof.
Background
A flame arrestor is a device for preventing the spread of a flame of flammable gases and flammable liquids, typically installed in an inlet or outlet or duct of the device, which functions to allow the medium to pass through, but must be capable of extinguishing the flame. The key to the flame arrester is the flame arresting element, whose principle of extinguishing the flame is to reduce the flame temperature rapidly mainly by the medium heat transfer effect, and at the same time to reduce the concentration of active radicals in the flame by the wall effect, so that the chemical reaction in the flame is slowed down to stop, and the flame spread is prevented.
For example, CN 203154665U discloses a special spark arrester of pipeline, and this spark arrester includes inner shell and shell, and the both ends of inner shell and shell are provided with the ring flange, have the back-fire relief core in the inner shell, are equipped with the steel wire area in the inner shell at both ends about the back-fire relief core, and the back-fire relief core left and right sides is provided with holding ring and solid fixed ring respectively, all is provided with the side baffle between back-fire relief core and the holding ring and between back-fire relief core and the solid fixed ring, and shell one end upper portion and shell other end lower part. The fire arrester prevents high-speed flame through a steel wire belt in the inner shell and side clapboards arranged at the left end and the right end of the fire retardant core.
However, in the course of use of flame arrestors, flame arrestor filter elements are prone to clogging, requiring periodic inspection and cleaning, which can interfere with the proper operation of the flame arrestor system in use.
CN 110013630 a discloses a flame arrester with self-cleaning function, which comprises a flame arrester housing, flame arresting elements, a gas injection channel, and a gas throttle valve, wherein the number of the flame arresting elements is at least two, the flame arresting elements are respectively distributed on two sides of the flame arrester, the gas injection channel is arranged between the flame arresting elements, the gas injection channel is provided with a gas injection pipeline, and the gas injection pipeline outside the flame arrester housing is provided with the gas throttle valve. This spark arrester utilizes the outside gas filling opening to pour into fresh nitrogen gas into between the back-fire relief component, utilizes nitrogen gas to sweep the back-fire relief component on the one hand, makes it have the automatically cleaning effect, and the while that lasts sweeps can guarantee that the back-fire relief component has lower temperature, has improved its back-fire relief efficiency. However, the flame arrester needs to continuously introduce external gas in the use process, and the cost is high.
CN 206007846U discloses an anti-clogging flue flame arrester, including chimney, automatic descaling mechanism, support and top cap. The support is welded on the upper part of the chimney, and the top cover is arranged on the upper part of the support; the automatic descaling mechanism comprises a lower stainless steel wire mesh, a stainless steel brush, a rotating shaft, an upper stainless steel wire mesh, a flange plate, a bearing, a bottom plate and an arrow-shaped vane, wherein the stainless steel brush is fixed with the lower part of the rotating shaft through a bolt; the lower layer stainless steel wire mesh is arranged below the stainless steel brush; the rotating shaft is connected with a flange plate with a plurality of holes through a bearing. Although the blockage problem of the flame arrester can be relieved through the stainless steel mesh and the stainless steel brush, the pressure drop at the flame arrester is large, and the gas treatment efficiency is not improved.
Therefore, the fire retardant system with the dredging function and the use method thereof are high in fire retardant efficiency and do not affect tail gas emission, and have important significance for improving the emission efficiency of combustible tail gas, and further the production efficiency of enterprises can be improved.
Disclosure of Invention
The invention aims to provide a fire retardant system with a dredging function and a using method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a fire retardant system with a dredging function, which comprises a tail gas conveying unit, a purge gas conveying unit, a fire retardant unit, a purge gas collecting unit and a tail gas collecting unit;
the tail gas conveying unit and the purge gas conveying unit are respectively and independently connected with an air inlet of the fire retardant unit;
the sweep gas collection unit and the tail gas collection unit are respectively and independently connected with the gas outlet of the fire retardant unit.
Impurities in the tail gas can block the fire retardant unit, the fire retardant unit is blown by the blowing gas conveying unit, and blown gas is collected by the blowing gas collecting unit, so that the purpose of dredging the fire retardant unit is achieved.
Preferably, the tail gas conveying unit comprises a tail gas conveying pipeline and a tail gas conveying valve arranged on the tail gas conveying pipeline.
Preferably, the exhaust gas delivery valve comprises an exhaust gas delivery solenoid valve and/or an exhaust gas delivery pneumatic valve.
According to the invention, the electromagnetic valve and/or the pneumatic valve for controlling tail gas delivery are/is arranged on the tail gas delivery pipeline, so that the quick control of the opening and closing of the tail gas delivery pipeline can be realized. Preferably, the opening and closing of the solenoid valve and/or the pneumatic valve are controlled by a control unit, and the control unit includes, but is not limited to, a PLC control unit and/or a DCS control unit, which is not described herein again.
Preferably, the purge gas delivery unit comprises a purge gas delivery pipe and a purge gas delivery valve arranged on the purge gas delivery pipe.
Preferably, the purge gas delivery valve comprises a purge gas delivery solenoid valve and/or a purge gas delivery pneumatic valve.
According to the invention, the electromagnetic valve and/or the pneumatic valve for controlling the delivery of the purge gas are/is arranged on the purge gas delivery pipeline, so that the rapid control of the opening and closing of the purge gas delivery pipeline can be realized. Preferably, the opening and closing of the solenoid valve and/or the pneumatic valve are controlled by a control unit, and the control unit includes, but is not limited to, a PLC control unit and/or a DCS control unit, which is not described herein again.
Preferably, the purge gas conveying unit further comprises a purge gas bypass, a manual valve arranged on the purge gas bypass, and manual valves arranged on the purge gas conveying pipeline and arranged on two sides of the purge gas conveying valve;
when a scavenging gas conveying valve on the scavenging gas conveying pipeline normally operates, a manual valve on a scavenging gas bypass is closed, and meanwhile, manual valves on two sides of the scavenging gas conveying valve are opened; when the scavenging gas delivery valve on the scavenging gas delivery pipeline fails and cannot normally operate, the manual valve on the scavenging gas bypass is opened, and meanwhile, the manual valves on two sides of the scavenging gas delivery valve are closed.
Preferably, the gas inlet of the flame arrester unit is provided with a gas nozzle. By the arrangement of the nozzles, it is possible for the gas to better come into contact with the wire in the flame arrester unit.
Preferably, the exhaust gas collection unit comprises an exhaust gas collection pipeline and an exhaust gas collection valve arranged on the exhaust gas collection pipeline.
Preferably, the exhaust gas collecting valve comprises an exhaust gas collecting solenoid valve and/or an exhaust gas collecting pneumatic valve.
According to the invention, the electromagnetic valve and/or the pneumatic valve for controlling tail gas collection are/is arranged on the tail gas collection pipeline, so that the quick control of the opening and closing of the tail gas collection pipeline can be realized. Preferably, the opening and closing of the solenoid valve and/or the pneumatic valve are controlled by a control unit, and the control unit includes, but is not limited to, a PLC control unit and/or a DCS control unit, which is not described herein again.
Preferably, the purge gas collecting unit includes a purge gas collecting pipe and a purge gas collecting valve provided on the purge gas collecting pipe.
The purge gas collecting pipeline is connected with a connecting pipeline of the tail gas collecting valve and the fire retardant unit.
Preferably, the purge gas collecting valve comprises a purge gas collecting solenoid valve and/or a purge gas collecting pneumatic valve.
Preferably, a sight glass is further arranged on the purge gas collecting pipeline. According to the invention, through arranging the sight glass, technicians in the field can observe the condensation condition of the purge gas through the sight glass, so that the cleanness degree of the purge gas is judged visually, and then the dredging effect of the flame arrester is judged.
According to the invention, the electromagnetic valve and/or the pneumatic valve for controlling the collection of the purge gas is/are arranged on the purge gas collecting pipeline, so that the rapid control of the opening and closing of the purge gas collecting pipeline can be realized. Preferably, the opening and closing of the solenoid valve and/or the pneumatic valve are controlled by a control unit, and the control unit includes, but is not limited to, a PLC control unit and/or a DCS control unit, which is not described herein again.
Preferably, the purge gas collecting unit further comprises a purge gas collecting bypass, a manual valve arranged on the purge gas collecting bypass, and manual valves arranged on the purge gas collecting pipeline and on two sides of the purge gas collecting valve; the purge gas collection bypass and the manual valve are provided to prevent the purge gas collection valve from malfunctioning.
When the purge gas collecting valve on the purge gas collecting pipeline normally operates, the manual valve on the purge gas collecting bypass is closed, and meanwhile, the manual valves on two sides of the purge gas collecting valve are opened; when the scavenging gas collecting valve on the scavenging gas collecting pipeline fails and cannot normally operate, the manual valve on the scavenging gas collecting bypass is opened, and meanwhile, the manual valves on two sides of the scavenging gas collecting valve are closed.
Preferably, the fire retardant unit comprises at least one fire retardant and pressure gauges independently arranged at two ends of each fire retardant respectively; the pressure gauge is used for measuring the pressure difference between the air inlet of the flame arrester and the air outlet support.
The flame arresting unit comprises at least one flame arrester, which may be, for example, 1, 2, 3, 4, 5 or 6 flame arresters connected in series and/or in parallel, including but not limited to the values recited, and other values within the range of values not recited are equally applicable. Preferably at least two flame arresters connected in parallel and pressure gauges independently arranged at two ends of each flame arrester respectively, the pressure gauges are used for measuring the pressure difference between the air inlet and the air outlet support of the flame arresters.
And the tail gas conveying unit and the purge gas conveying unit are respectively and independently connected with the air inlet of each flame arrester.
The tail gas conveying unit and the sweeping gas conveying unit are respectively and independently connected with the gas inlet of each flame arrester, namely, when the flame arrester unit comprises two flame arresters connected in parallel, the tail gas conveying unit comprises two independent tail gas conveying pipelines which are respectively connected with the gas inlets of the corresponding flame arresters; the sweeping gas collecting unit comprises two independent sweeping gas conveying pipelines, and the two independent sweeping gas conveying pipelines are respectively connected with the air inlets of the corresponding flame arresters.
When the fire retardant unit comprises three fire retardants connected in parallel, the tail gas conveying unit comprises three independent tail gas conveying pipelines which are respectively connected with the gas inlets of the corresponding fire retardants; the scavenging gas collection unit comprises three independent scavenging gas conveying pipelines which are respectively connected with the air inlets of the corresponding flame arresters.
The sweep gas collection unit and the tail gas collection unit are respectively and independently connected with the gas outlet of each flame arrester.
The tail gas collecting unit and the sweep gas collecting unit are respectively and independently connected with the gas inlet of each flame arrester, namely, when the flame arrester unit comprises two flame arresters which are connected in parallel, the tail gas collecting unit comprises two independent tail gas collecting pipelines which are respectively connected with the gas inlets of the corresponding flame arresters; the sweeping gas collecting unit comprises two independent sweeping gas collecting pipelines, and the two independent sweeping gas collecting pipelines are respectively connected with the air inlets of the corresponding flame arresters.
When the fire retardant unit comprises three fire retardants connected in parallel, the tail gas collecting unit comprises three independent tail gas collecting pipelines which are respectively connected with the gas inlets of the corresponding fire retardants; the scavenging gas collection unit comprises three independent scavenging gas collection pipelines which are respectively connected with the air inlets of the corresponding flame arresters.
In a second aspect, the invention provides a method of using a flame arrestor with a deoccluding function as described in the first aspect, the method comprising the steps of: and (4) blowing the flame arrester by using the blowing gas, and collecting the gas of the blowing gas.
Preferably, the purge gas is saturated steam with a temperature of 100 to 150 ℃ and an absolute pressure of 0.1 to 0.5MPa, the saturated steam having a temperature of 100 ℃, 110 ℃, 120 ℃, 130 ℃, 140 ℃ or 150 ℃, but not limited to the recited values, and other values not recited in the numerical range are equally applicable; the absolute pressure of the saturated steam is 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa or 0.5MPa, but the absolute pressure is not limited to the values listed, and other values not listed in the numerical range are also applicable.
Preferably, the specific operation of purging the flame arrester with the purge gas is: judging the pressure difference of the inlet and the outlet of the flame arrester according to the reading of pressure gauges on the two sides of the flame arrester, and when the pressure difference reaches over 800Pa, indicating that the flame arrester is blocked; at this moment, close tail gas pipeline and tail gas collecting pipe through control valve opens and close, simultaneously, open purge gas pipeline and purge gas collecting pipe, use the purge gas to sweep the spark arrester, when the pressure differential of spark arrester exit reduces to below 700Pa, the mediation is accomplished to the spark arrester, observes clean comdenstion water in the sight glass, and at this moment, open and close through control valve and close purge gas pipeline and purge gas collecting pipe, simultaneously, open tail gas pipeline and tail gas collecting pipe.
Preferably, when the flame arrester unit comprises at least two flame arresters connected in parallel, when one of the flame arresters becomes blocked, the blocked flame arrester is purged while the other unblocked flame arresters are opened, thereby ensuring the continuity of the exhaust gas treatment. When the blockage of the flame arrester is finished, the flame arrester is ready for use.
Compared with the prior art, the invention has the following beneficial effects:
(1) the fire retardant system with the dredging function is simple in structure, the fire retardant device is dredged through switching of the valve, and equipment cost is low;
(2) the fire retardant system with the dredging function provided by the invention can enable tail gas treatment to be continuously carried out by designing a plurality of groups of fire retardants connected in parallel and respectively arranging independent inlet and outlet pipelines, so that the tail gas treatment efficiency is improved;
(3) the fire retardant system with the dredging function provided by the invention can improve the safety of the system by arranging the bypass.
Drawings
FIG. 1 is a schematic structural view of a firestop system with a deoccluding function provided in example 1;
FIG. 2 is a schematic structural view of a firestop system with deoccluding functionality as provided in example 2;
FIG. 3 is a schematic illustration of the firestop system with deoccluding functionality provided in example 3;
fig. 4 is a schematic structural diagram of a fire retardant system with a dredging function provided in example 4.
Wherein: 1-1, a first tail gas delivery valve; 1-2, a second tail gas delivery valve; 2-1, a first tail gas collecting valve; 2-2, a second tail gas collecting valve; 3-1, a first purge gas delivery valve; 3-2, a second purge gas delivery valve; 4-1, a first purge gas collection valve; 4-2, a second purge gas collection valve; 5-1, a first flame arrestor; 5-2, a second flame arrestor; 6, a manual valve; and 7, viewing the glasses.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
The embodiment provides a fire retardant system with mediation function, the schematic structural diagram of fire retardant system with mediation function is shown in fig. 1, including tail gas conveying unit, purge gas conveying unit, fire retardant unit, purge gas collection unit and tail gas collection unit.
The fire retardant unit comprises a first fire retardant device 5-1 and pressure gauges respectively arranged at an inlet and an outlet of the first fire retardant device 5-1, and an air inlet nozzle is arranged at an air inlet of the first fire retardant device 5-1; the tail gas conveying unit comprises a tail gas conveying pipeline and a first tail gas conveying valve 1-1 arranged on the tail gas conveying pipeline; the purge gas conveying unit comprises a purge gas conveying pipeline and a first purge gas conveying valve 3-1 arranged on the purge gas conveying pipeline; the tail gas conveying unit and the purge gas conveying unit are respectively and independently connected with an air inlet of the fire retardant unit.
The tail gas collecting unit comprises a tail gas collecting pipeline and a first tail gas collecting valve 2-1 arranged on the tail gas collecting pipeline; the purge gas collecting unit comprises a purge gas collecting pipeline and a first purge gas collecting valve 4-1 arranged on the purge gas collecting pipeline; the sweep gas collection unit and the tail gas collection unit are respectively and independently connected with the gas outlet of the fire retardant unit.
The first tail gas delivery valve 1-1, the first tail gas collection valve 2-1, the first purge gas delivery valve 3-1 and the first purge gas collection valve 4-1 are respectively and independently electromagnetic valves and/or pneumatic valves.
When the fire retardant system with the dredging function is applied, whether the first fire retardant device 5-1 is blocked is judged according to pressure gauges on two sides of the first fire retardant device 5-1, when the pressure difference on two sides of the first fire retardant device 5-1 is more than 800Pa, the first tail gas conveying valve 1-1 and the first tail gas collecting valve 2-1 are closed, the first blowing gas conveying valve 3-1 and the first blowing gas collecting valve 4-1 are opened simultaneously, and saturated steam with the absolute pressure of 0.1-0.5MPa and the temperature of 100-150 ℃ is used for blowing the first fire retardant device 5-1. When the pressure difference between two sides of the first flame arrester 5-1 is reduced to be less than 600Pa, the first tail gas delivery valve 1-1 and the first tail gas collection valve 2-1 are opened, and the first blowing gas delivery valve 3-1 and the first blowing gas collection valve 4-1 are closed at the same time, so that the first flame arrester 5-1 is blown.
Example 2
The embodiment provides a fire retardant system with mediation function, the schematic structural diagram of fire retardant system with mediation function is shown in fig. 2, including tail gas conveying unit, purge gas conveying unit, fire retardant unit, purge gas collection unit and tail gas collection unit.
The flame retardant unit comprises a first flame arrester 5-1 and a second flame arrester 5-2 which are connected in parallel, and pressure gauges which are respectively and independently arranged on two sides of the first flame arrester 5-1 and the second flame arrester 5-2, and air inlet nozzles are arranged at air inlets of the first flame arrester 5-1 and the second flame arrester 5-2; the tail gas conveying unit comprises two independent tail gas conveying pipelines, and a first tail gas conveying valve 1-1 and a first tail gas conveying valve 1-2 are respectively and independently arranged on the two tail gas conveying pipelines; the scavenging gas conveying unit comprises two scavenging gas conveying pipelines which are respectively and independently arranged, and a first scavenging gas conveying valve 3-1 and a second scavenging gas conveying valve 3-2 are respectively and independently arranged on the two scavenging gas conveying pipelines; and the tail gas conveying pipeline and the purge gas conveying pipeline are respectively and independently connected with the air inlets of the corresponding flame arresters.
The tail gas collecting unit comprises two independent tail gas collecting pipelines, and a first tail gas collecting valve 2-1 and a second tail gas collecting valve 2-2 are respectively and independently arranged on the two tail gas collecting pipelines; the scavenging gas collecting unit comprises two scavenging gas collecting pipelines which are respectively and independently arranged, and a first scavenging gas collecting valve 4-1 and a second scavenging gas collecting valve 4-2 are respectively and independently arranged on the two scavenging gas collecting pipelines; and the tail gas collecting pipeline and the scavenging gas collecting pipeline are respectively and independently connected with the gas outlets of the corresponding flame arresters.
The first tail gas conveying valve 1-1, the first tail gas conveying valve 1-2, the first tail gas collecting valve 2-1, the second tail gas collecting valve 2-2, the first scavenging gas conveying valve 3-1, the second scavenging gas conveying valve 3-2, the first scavenging gas collecting valve 4-1 and the second scavenging gas collecting valve 4-2 are respectively and independently electromagnetic valves and/or pneumatic valves.
When the fire retardant system with the dredging function is applied, the first fire retardant device 5-1 and the second fire retardant device 5-2 are opened and closed. Judging whether the first flame arrester 5-1 is blocked according to pressure gauges on two sides of the first flame arrester 5-1, closing the first tail gas conveying valve 1-1 and the first tail gas collecting valve 2-1 when the pressure difference on two sides of the first flame arrester 5-1 is more than 800Pa, simultaneously opening the first blowing gas conveying valve 3-1 and the first blowing gas collecting valve 4-1, and blowing the first flame arrester 5-1 by using saturated steam with the absolute pressure of 0.1-0.5MPa and the temperature of 100-150 ℃.
Meanwhile, the first tail gas delivery valve 1-2 and the second tail gas collection valve 2-2 are opened, so that the tail gas flows through the second flame arrester 5-2.
When the pressure difference between two sides of the first flame arrester 5-1 is reduced to be less than 600Pa, the first blowing gas delivery valve 3-1 and the first blowing gas collection valve 4-1 are closed, the first flame arrester 5-1 is blown and cleaned, and the first flame arrester 5-1 is reserved. When the pressure difference between two sides of the second flame arrester 5-2 is more than 800Pa, the second flame arrester 5-2 is blown and the tail gas flows through the first flame arrester 5-1.
Example 3
The embodiment provides a fire retardant system with mediation function, the schematic structural diagram of fire retardant system with mediation function is shown in fig. 3, and the fire retardant system comprises a tail gas conveying unit, a purge gas conveying unit, a fire retardant unit, a purge gas collecting unit and a tail gas collecting unit.
Compared with the embodiment 2, in the fire retardant system with the dredging function provided by the embodiment, the purge gas conveying unit further comprises a purge gas bypass, a manual valve 6 arranged on the purge gas bypass, and manual valves 6 arranged on two sides of the purge gas conveying valve on the purge gas conveying pipeline; the scavenging gas collecting unit also comprises a scavenging gas collecting bypass, a manual valve 6 arranged on the scavenging gas collecting bypass and manual valves 6 arranged on two sides of the scavenging gas collecting valve on the scavenging gas collecting pipeline; the rest is the same as in example 2.
The scavenging gas bypass and the manual valve 6 are reserved to prevent the scavenging gas delivery valve from malfunctioning, when the scavenging gas delivery valve on the scavenging gas delivery pipeline normally operates, the manual valve 6 on the scavenging gas bypass is closed, and meanwhile, the manual valves 6 on two sides of the scavenging gas delivery valve are opened; when the scavenging gas delivery valve on the scavenging gas delivery pipeline fails and cannot normally operate, the manual valve 6 on the scavenging gas bypass is opened, and meanwhile, the manual valves 6 on two sides of the scavenging gas delivery valve are closed.
The scavenging gas collecting bypass and the manual valve 6 are reserved to prevent the scavenging gas collecting valve from being out of order, when the scavenging gas collecting valve on the scavenging gas collecting pipeline normally operates, the manual valve 6 on the scavenging gas collecting bypass is closed, and meanwhile, the manual valves 6 on two sides of the scavenging gas collecting valve are opened; when the scavenging gas collecting valve on the scavenging gas collecting pipeline fails and cannot normally operate, the manual valve 6 on the scavenging gas collecting bypass is opened, and meanwhile, the manual valves 6 on two sides of the scavenging gas collecting valve are closed.
Example 4
The embodiment provides a fire retardant system with mediation function, the schematic structural diagram of fire retardant system with mediation function is shown in fig. 4, and the fire retardant system comprises a tail gas conveying unit, a purge gas conveying unit, a fire retardant unit, a purge gas collecting unit and a tail gas collecting unit.
Compare with embodiment 3, among the back-fire relief system with mediation function that this embodiment provided, still be provided with sight glass 7 on the sweeping gas collecting pipe, sight glass 7 is used for technical staff in the field to observe the sweeping gas condensation condition to the realization is through the clean degree of visual judgement sweeping gas, and then judges the mediation effect of spark arrester.
When the fire retardant system with the dredging function is applied, the first fire retardant device 5-1 and the second fire retardant device 5-2 are opened and closed. Judging whether the first flame arrester 5-1 is blocked according to pressure gauges on two sides of the first flame arrester 5-1, closing the first tail gas conveying valve 1-1 and the first tail gas collecting valve 2-1 when the pressure difference on two sides of the first flame arrester 5-1 is more than 800Pa, simultaneously opening the first blowing gas conveying valve 3-1 and the first blowing gas collecting valve 4-1, and blowing the first flame arrester 5-1 by using saturated steam with the absolute pressure of 0.1-0.5MPa and the temperature of 100-150 ℃.
Meanwhile, the first tail gas delivery valve 1-2 and the second tail gas collection valve 2-2 are opened, so that the tail gas flows through the second flame arrester 5-2.
When the crystallization of the blowing gas condensate is observed in the sight glass 7, the first flame arrester 5-1 finishes blowing, the first blowing gas delivery valve 3-1 and the first blowing gas collection valve 4-1 are closed, the blowing of the first flame arrester 5-1 is finished, and the first flame arrester 5-1 is reserved. When the pressure difference between two sides of the second flame arrester 5-2 is more than 800Pa, the second flame arrester 5-2 is blown and the tail gas flows through the first flame arrester 5-1.
In conclusion, the fire retardant system with the dredging function is simple in structure, the fire retardant device is dredged through switching of the valve, and the equipment cost is low; the fire retardant system with the dredging function provided by the invention can enable tail gas treatment to be continuously carried out by designing a plurality of groups of fire retardants connected in parallel and respectively arranging independent inlet and outlet pipelines, so that the tail gas treatment efficiency is improved; the fire retardant system with the dredging function provided by the invention can improve the safety of the system by arranging the bypass.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The fire retardant system with the dredging function is characterized by comprising a tail gas conveying unit, a purge gas conveying unit, a fire retardant unit, a purge gas collecting unit and a tail gas collecting unit;
the tail gas conveying unit and the purge gas conveying unit are respectively and independently connected with an air inlet of the fire retardant unit;
the sweep gas collection unit and the tail gas collection unit are respectively and independently connected with the gas outlet of the fire retardant unit.
2. The fire retardant system with the dredging function as claimed in claim 1, wherein the tail gas conveying unit comprises a tail gas conveying pipeline and a tail gas conveying valve arranged on the tail gas conveying pipeline;
preferably, the exhaust gas delivery valve comprises an exhaust gas delivery solenoid valve and/or an exhaust gas delivery pneumatic valve.
3. The fire retardant system with the dredging function as claimed in claim 2, wherein the purge gas conveying unit comprises a purge gas conveying pipeline and a purge gas conveying valve arranged on the purge gas conveying pipeline;
preferably, the purge gas delivery valve comprises a purge gas delivery solenoid valve and/or a purge gas delivery pneumatic valve.
4. The fire retardant system with dredging function as claimed in claim 3, wherein the purge gas delivery unit further comprises a purge gas bypass, a manual valve arranged on the purge gas bypass, and manual valves arranged on the purge gas delivery pipeline on two sides of the purge gas delivery valve;
the purge gas bypass and manual valve are provided to prevent failure of the purge gas delivery valve.
5. The fire retardant system with the dredging function as claimed in any one of claims 1 to 4, wherein the exhaust gas collecting unit comprises an exhaust gas collecting pipeline and an exhaust gas collecting valve arranged on the exhaust gas collecting pipeline;
preferably, the exhaust gas collecting valve comprises an exhaust gas collecting solenoid valve and/or an exhaust gas collecting pneumatic valve.
6. The fire retardant system with dredging function as claimed in claim 5, wherein the sweep gas collecting unit comprises a sweep gas collecting pipeline and a sweep gas collecting valve arranged on the sweep gas collecting pipeline;
preferably, the purge gas collecting valve comprises a purge gas collecting solenoid valve and/or a purge gas collecting pneumatic valve;
preferably, a viewing mirror is further arranged on the purge gas collecting pipeline;
preferably, the purge gas collecting unit further comprises a purge gas collecting bypass, a manual valve arranged on the purge gas collecting bypass, and manual valves arranged on the purge gas collecting pipeline and on two sides of the purge gas collecting valve; the purge gas collection bypass and the manual valve are provided to prevent the purge gas collection valve from malfunctioning.
7. The system for retarding fire with a dredging function as claimed in any one of claims 1 to 6, wherein the fire retarding unit comprises at least one fire arrestor and pressure gauges independently provided at both ends of each fire arrestor;
the pressure gauge is used for measuring the pressure difference between the air inlet of the flame arrester and the air outlet support.
8. The fire retardant system with the dredging function as claimed in claim 7, wherein the fire retardant unit comprises at least two fire retardants connected in parallel and pressure gauges independently arranged at two ends of each fire retardant respectively, and the pressure gauges are used for measuring the pressure difference between an air inlet and an air outlet support of each fire retardant;
the tail gas conveying unit and the purge gas conveying unit are respectively and independently connected with the gas inlet of each flame arrester;
the sweep gas collection unit and the tail gas collection unit are respectively and independently connected with the gas outlet of each flame arrester.
9. A method of using a flame arrestor with deoccluding functionality as in any one of claims 1-8, comprising the steps of: and (4) blowing the flame arrester by using the blowing gas, and collecting the gas of the blowing gas.
10. Use according to claim 9, characterized in that the purge gas is saturated steam at a temperature of 100-150 ℃ and an absolute pressure of 0.1-0.5 MPa.
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| CN202010124588.7A CN111174097A (en) | 2020-02-27 | 2020-02-27 | Fire retardant system with dredging function and use method thereof |
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| CN202010124588.7A CN111174097A (en) | 2020-02-27 | 2020-02-27 | Fire retardant system with dredging function and use method thereof |
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| CN111804678A (en) * | 2020-07-17 | 2020-10-23 | 提技贸易(上海)有限公司 | Automatic cleaning system for central calandria and control method |
| CN114100028A (en) * | 2021-10-29 | 2022-03-01 | 东明中信国安瑞华新材料有限公司 | Intelligent anti-polymerization detonation-resistant flame arrester |
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