CN110203699A - A kind of dry powder fire extinguishing agent conveying experiment porch - Google Patents
A kind of dry powder fire extinguishing agent conveying experiment porch Download PDFInfo
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- CN110203699A CN110203699A CN201910392551.XA CN201910392551A CN110203699A CN 110203699 A CN110203699 A CN 110203699A CN 201910392551 A CN201910392551 A CN 201910392551A CN 110203699 A CN110203699 A CN 110203699A
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- dry powder
- fire extinguishing
- gas
- extinguishing agent
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Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/50—Testing or indicating devices for determining the state of readiness of the equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/16—Gas pressure systems operating with fluidisation of the materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/60—Devices for separating the materials from propellant gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
- G01G11/08—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers having means for controlling the rate of feed or discharge
- G01G11/12—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers having means for controlling the rate of feed or discharge by controlling the speed of the belt
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
- G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
- G01G17/06—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes having means for controlling the supply or discharge
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Air Transport Of Granular Materials (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The present invention relates to a kind of dry powder fire extinguishing agents to convey experiment porch, comprising: fluidisation blowing device, for generating the dry powder fire extinguishing agent for injection；Pipeline experimental rig is set to the outlet of the fluidisation blowing device, has removably pipe joint, to be tested transports pipeline to install；And recycling transfer device, it is set to the outlet of the pipeline experimental rig, the dry powder fire extinguishing agent can be collected, each ingredient in the dry powder fire extinguishing agent is disconnected from each other, and the dry powder formulation isolated is transported to the fluidisation blowing device.Based on the above-mentioned technical proposal, the recycling to dry powder at least may be implemented in the embodiment of the present invention, to reduce the cost that dry powder transports experiment, guarantees personnel and Environmental security in experimentation.
Description
Technical field
The present invention relates to fire-fighting domains more particularly to a kind of dry powder fire extinguishing agent to convey experiment porch.
Background technique
Using dry powder-nitrogen extinguishing agent as the fire-fighting quipment of representative, dry powder material therein can generate Chemical Inhibition and bear
Catalytic action is to interrupt chemical reaction, or forming vitreous coating under high-temperature operation keeps combustion zone isolated, and its
In high pressure nitrogen dry powder material can then uniformly sprayed with fluidized state with certain speed, and itself can also play centainly
The insulating effect of degree.Therefore, it can be used for fighting flammable liquid using dry powder-nitrogen two phase flow as the fire-fighting equipment of extinguishing chemical
(such as oils, liquid hydrocarbon, alcohol, ester, ether), fuel gas (such as liquefied petroleum gas, natural gas, coal gas) and electrical equipment fire
Deng with the extensive scope of application.
General dry powder fire-fighting equipment is equipped with dry powder fire extinguishing agent tank, connecting line and dry powder injection apparatus, works as fire extinguishing
Under conditions of the substance characteristics of agent have determined, extinguishing effect will depend on dry powder injection apparatus (including but not limited to dry powder
Big gun, powder fire branch or three-phase jet big gun) spray the parameters such as intensity, range and the covering range of dry powder fire extinguishing agent.And these parameters are then
It is determined by the dry powder before determining the dry powder injection apparatus of model specification and entering injection apparatus-nitrogen supply state coupling.
Wherein the matching type selecting of dry powder injection apparatus is based on dry powder injection apparatus institute mainly according to the extinguishing property requirement of fire-fighting equipment
The working pressure range of adaptation, equivalent spraying rate (unit: kg/s), range, injector pitching/rotary motion range and manipulation side
The corresponding dry powder injection apparatus of the selections such as formula.Therefore, once completing the matching type selecting to injection apparatus, the fire extinguishing effect of fire plant
Fruit will depend on dry powder-nitrogen supply state into before dry powder injection apparatus.
Before dry powder-nitrogen extinguishing agent is conveyed to dry powder injection apparatus, at least need following preparation step: streaming tank is filled out
Fill dry powder, high pressure nitrogen storage bottle is streaming tank inflation, the dry powder fluidisation in streaming tank, opens streaming tank outlet so that dry powder-nitrogen
Gas two phase flow enters transfer pipeline.It can be seen that the dry powder of injection apparatus entrance-nitrogen two phase flow supply state greatly takes
Certainly in streaming tank to the fluid effect and pipeline of dry powder to dry powder-nitrogen two phase flow conveying effect.
Based on this, in order to evaluate and optimize the effect of dry powder fire-fighting equipment, it is necessary to which foundation can study streaming tank to dry
Powder fluid effect and pipeline transport the experiment porch of effect to dry powder-nitrogen two phase flow, especially corresponding with entity size
Experiment porch.But the dry powder due to caused by the ejection of dry powder fire extinguishing agent, which diffuses, not only can cause dust pollution to environment,
It is also easy to cause experimenter serious sucking to injure, therefore currently without safe and reliable experiment porch.In addition, dry powder goes out
The higher cost (about 20,000 yuan/ton) of fiery agent will be completed to need anti-dry powder fluid effect and the test transported
Multiple injection, the cost of this process is excessively high, and causes the dry powder for lacking entity size to blow and convey the important of test platform
Reason.
Summary of the invention
To overcome the above technological deficiency, the technical problem to be solved by the present invention is to provide a kind of conveying experiment of dry powder fire extinguishing agent is flat
Platform can be realized the recycling to dry powder, to reduce the cost for transporting experiment to dry powder, guarantee the personnel in experimentation
With Environmental security.
In order to solve the above technical problems, the present invention provides a kind of dry powder fire extinguishing agents to convey experiment porch, comprising: fluidisation is blown
Device is sent, for generating the dry powder fire extinguishing agent for injection；Pipeline experimental rig is set to going out for the fluidisation blowing device
Mouthful, there is removably pipe joint, to be tested transport pipeline to install；And recycling transfer device, it is set to described
The outlet of pipeline experimental rig can collect the dry powder fire extinguishing agent, and each ingredient in the dry powder fire extinguishing agent is disconnected from each other,
And the dry powder formulation isolated is transported to the fluidisation blowing device.
Further, the recycling transfer device includes: separative unit, for separating the dry powder in the dry powder fire extinguishing agent
Ingredient and gas componant；And dry powder recovery bin, it is undertaken in the separative unit, for collecting storage by the separative unit point
The dry powder formulation separated out.
Further, the separative unit includes: extinguishing chemical import, for the dry powder fire extinguishing agent to be imported the separation
Unit；Gas vent, for gas componant after separation to be exported the separative unit；And dry powder outlet, along vertical side
To the lower section for being located at the gas vent, for dry powder formulation after separation to be exported the separative unit.
Further, the separative unit includes: cyclone separator, can be by turning effort by the gas-dry powder
Each ingredient in two-phase extinguishing chemical is separated by centrifugal force size；Inertial dust separator, can be by changing the gas-dry powder
The direction of motion of two-phase extinguishing chemical separates each ingredient by inertia size；And/or bag filter, it can be former based on filtering
Reason is separated each ingredient in the gas-dry powder two-phase extinguishing chemical by volume size.
Further, the separative unit includes: level-one separation equipment, is provided with the first mixing extinguishing chemical import, first
Gas vent and the outlet of the first dry powder；And the second-order separation equipment, it is provided with the second mixing extinguishing chemical import, second gas outlet
It is exported with the second dry powder；Wherein, the second mixing extinguishing chemical import and the first gas outlet, to make described two
Grade separation equipment carries out secondary separation to through the isolated gas componant of the level-one separation equipment.
Further, the level-one separation equipment includes: cyclone separator, for isolating in the dry powder fire extinguishing agent
The dry powder formulation of 5~15 microns of diameter of grain or more；The second-order separation equipment includes: bag filter, in the rotation
On the basis of the separation of stream separator, it is further separated out 0.4 micron of particle diameter or more of dry powder formulation.
Further, the experiment porch further include: pressure regulation piping installation is set to going out for the pipeline experimental rig
Mouthful, it is provided with the first ball valve, the pressure for flowing through the dry powder fire extinguishing agent of itself can be adjusted.
Further, the fluidisation blowing device includes: streaming tank, have dry powder formulation entrance, gas componant entrance with
And dry powder fire extinguishing agent outlet, for dry powder formulation to be fluidized；And high-pressure air source, institute is connected to by the second ball valve pressure-adjustable
State gas componant entrance.
Further, the recycling transfer device includes: screw conveyor, is driven by motor, to by dry powder formulation from
The dry powder recovery bin is delivered to the dry powder formulation entrance of the streaming tank；And electric cabinet, the motor control can be passed through
The operation and delivery rate of the spiral hauler.
Further, the dry powder formulation entrance of the streaming tank is located at the upper of the gas componant entrance along the vertical direction
Side, the spiral, which transports machine, can promote the height of the dry powder formulation, and along the vertical direction from top to bottom by the dry powder at
Divide stake to the dry powder formulation entrance of the streaming tank.
Further, it is provided with third ball valve between the spiral hauler and the dry powder recovery bin, to control
Dry powder formulation is stated from the dry powder recovery bin to the transhipment of the spiral hauler.Further, the experiment porch further includes
Detecting and controlling system, the detecting and controlling system include: the first weighing device, to weigh the weight of the dry powder recovery bin；
Second weighing device, to weigh the weight of the streaming tank；Pressure measuring unit, to measure the outlet of the pipeline experimental provision
Pressure；Speed measuring device, to measure the inlet velocity of the recycling transfer device；And data acquisition device, communication connection in
First weighing device, second weighing device, the pressure measuring unit and the speed measuring device, can acquire and pass through
Display show the weight of the dry powder recovery bin, the weight of the streaming tank, the pipeline experimental provision outlet pressure and
The inlet velocity of the recycling transfer device.
Further, the detecting and controlling system further include: control device, communication connection in the data acquisition device,
And be configured as: can weight based on the dry powder recovery bin, the weight of the streaming tank, the pipeline experimental provision go out
The inlet velocity of mouthful pressure and the recycling transfer device, the driving speed of motor described in the process control by setting, and control
Make the aperture of first ball valve, second ball valve and the third ball valve.
As a result, based on the above-mentioned technical proposal, one of following advantageous effects at least may be implemented in the embodiment of the present invention:
Dry powder fire extinguishing agent conveying experiment porch provided herein can on the basis of solving dry powder recycling problem, etc.
Size simulates the dry powder delivery system of fire fighting truck, Dual-Phrase Distribution of Gas olid in detection dry powder injection transfer rate, flow velocity, pressure and pipeline
Conveying characteristic carries out functional assessment and optimization design to the dry powder transport system of conventional dry powder fire fighting truck or elevating fire truck；
Recycling transfer device provided herein passes through the composition complementary of cyclone separator and bag filter, realization pair
The large scale recycling (recycling ratio is greater than 90%) of common dry powder and ultra-fine dry powder, makes the discharge gas of experiment porch meet environmental protection
It is required that and guarantee test personnel health；
Dry powder recovery bin provided herein can store simultaneously the isolate of cyclone separator and bag filter, and lead to
It crosses a screw elevator and the dry powder that recycling obtains is transported to streaming tank, make to recycle transfer device compact overall structure, recycling
Returning charge route is succinct, low cost, reliable for operation；
First weighing device and the second weighing device provided herein, can by directly measure dry powder recovery bin with
The load-carrying of streaming tank changes, and the accurate detection to dry powder injection transfer rate is not only realized from principle, but also can be with comparative analysis
The precipitating situation of change of Pipeline transport dry powder during spray feed.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description for explaining only the invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is that multiphase extinguishing chemical provided by the embodiment of the present invention transports experiment porch structural schematic diagram.
1, blowing device, 11, streaming tank, 12, high-pressure air source, the 13, second ball valve are fluidized；
2, pipeline experimental provision, 21, pressure regulation piping installation, the 211, first ball valve；
3, recycling transfer device, 31, separative unit, 32, dry powder recovery bin, 33, cyclone separator, the 331, first mixing are gone out
Fiery agent import, 332, first gas outlet, the 333, first dry powder outlet, 34, bag filter, 341, second mixing extinguishing chemical into
Mouthful, 342, second gas outlet, the outlet of the 343, second dry powder, 35, spiral hauler, 36, electric cabinet, 37, third ball valve；
4, detecting and controlling system, the 41, first weighing device, the 42, second weighing device, 43, pressure measuring unit, 44, test the speed dress
It sets, 45 data acquisition devices/numerical control device.
Specific embodiment
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
A specific embodiment of the invention be for the ease of to design of the invention, it is solved the technical issues of, constitute skill
The technical characteristic and bring technical effect of art scheme have further description.It should be noted that for these embodiment party
The explanation of formula does not constitute a limitation of the invention simultaneously.In addition, technical characteristic involved in following embodiments of the present invention is only
Not constituting a conflict with each other can be combined with each other.
As shown in Figure 1, the present invention provides a kind of dry powder fire extinguishing agents to convey experiment porch, comprising: fluidisation blowing device is used
In generation for the dry powder fire extinguishing agent of injection；Pipeline experimental rig is set to the outlet of the fluidisation blowing device, and having can fill
The pipe joint unloaded to be tested transports pipeline to install；And recycling transfer device, it is set to the pipeline experimental rig
Outlet, can be disconnected from each other by the dry powder fire extinguishing agent and its conveying gas, and the dry powder formulation isolated is transported to institute
State fluidisation blowing device.
Typical dry powder fire extinguishing agent includes using dry powder-nitrogen as the extinguishing chemical of ingredient, wherein between solid-state and gaseous composition
Cooperation can greatly optimize the fire extinguishing effectiveness of extinguishing chemical, and can be suitably used for multiplicity, the fire extinguishing demands under complex situations.Many institutes
Known, the course of injection of dry powder fire extinguishing agent is exactly a kind of process of pneumatic transmission, is passed through before extinguishing effect and entrance injection apparatus
Preparation, the mixing gone through are related to transport process.
Specifically, at least needing to undergo following steps before the injection of dry powder fire extinguishing agent: streaming tank fills dry powder, elevated pressure nitrogen
Gas storage bottle is streaming tank inflation, the dry powder fluidisation in streaming tank and opens streaming tank outlet so that dry powder-nitrogen two-phase flows into
Enter transfer pipeline.In view of this, the fluidisation blowing device 1 provided herein be used to complete streaming tank filling dry powder,
High pressure nitrogen storage bottle is that the dry powder in streaming tank inflation and streaming tank fluidizes these three steps, to generate for injection
Dry powder-nitrogen Dual-Phrase Distribution of Gas olid is in case subsequent transport experiment.
On 1 working foundation of fluidisation blowing device, the pipeline experimental provision 2 passes through dismountable pipe joint,
The installation position of experimental subjects is provided to transport experiment porch, to easily carry out with caliber, Guan Xiangwei variable, or with whole
Body pipe-line system transports experiment for variable.
Specifically, removably pipe joint can assemble with different tube diameters, different pipe to experiment pipeline, thus
Control the entry condition (i.e. the pressure of guarantee dry powder fire extinguishing agent, flow velocity, proportion and fluidisation degree) of the pipeline experimental provision 2
Under the premise of constant, the influence of the variable diameter, deflecting of pipeline to dry powder fire extinguishing agent transport property is studied, to set up all kinds of dry powder
The experimental data basis of pipeline in fire fighting truck blowing system.Correspondingly, passing through the experiment assembled in control piper experimental provision 2
Pipeline is constant, changes the suction parameter of the pipeline experimental provision 2, can study different inlet conditions, is i.e. dry powder fire extinguishing agent exists
Under different in flow rate, different pressures, different ratio and different fluidized states, transport property of the experiment pipeline to extinguishing chemical.
The change of the above-mentioned form parameter to experiment pipeline and the entry condition to pipeline experimental provision 2 can become in control
It is unfolded under the principle of amount method, to form the multiple combinations experiment between two class variables, goes out for subsequent pipeline of setting up with dry powder
Fiery agent transports empirical equation, the existing type selecting assembly for transporting pipeline of improvement and the fluidisation for optimizing dry powder fire extinguishing agent between feature
It blows effect and experimental data support is provided.In addition, the pipeline experimental provision 2 can also be by constituting the equivalent of dry powder fire-engine
It transports pipeline and does technology preview as principle prototype for all kinds of fire fighting truck powder extinguishing systems in existing or design, thus with
Lower cost and higher reduction degree provide the benchmark of optimization design or assessment.
Transport feature of the dry powder fire extinguishing agent in pipeline may include that mass transport, momentum-transport and energy are defeated
Fortune.Mass transport therein can be used to characterize pipeline to the transport capability of ingredient each in dry powder fire extinguishing agent, such as when unit
Deposition of the quality, dry powder that interior dry powder-nitrogen two phase flow is transported in unit length pipeline and gas-solid than with defeated
Transport the change rate of length of pipe；Momentum-transport therein can be used to characterization and transport pipeline to the resistance of the dry powder fire extinguishing agent
Effect；And energy transport therein can then be used to characterize the dry powder fire extinguishing agent in transporting the transmission process in pipeline,
The pressure loss caused by as factors such as resistance, sudden expansions.
Based on the experiment of above-mentioned dry powder fire extinguishing agent transport property in pipeline, researcher can be in given pipe to, caliber
And under conditions of line entry state, the important performance indexes of powder extinguishing system are obtained --- the injection speed of injection apparatus
The dry powder quality (kg/s) sprayed in rate, i.e. unit time, to measure the supply intensity of extinguishing chemical.
The recycling transfer device 3 is used to each ingredient in separation dry powder fire extinguishing agent, and the dry powder formulation that will be isolated
Transport back the fluidisation blowing device 1.Thus, it is possible to guarantee in the experimentation of the experiment porch, dry powder fire extinguishing agent is unlikely
Pollution is generated to environment in experimental place in diffusing, or the health of experimenter is damaged.
Specifically, wherein the main component of dry powder includes ammonium dihydrogen phosphate, carbonic acid by taking dry powder-nitrogen extinguishing agent as an example
Hydrogen sodium, a small amount of anti-blushing agent magnesium stearate and talcum powder etc., these ingredients itself be do not have it is virose.Common dry-chemical fire extinguishing
The particle of agent is generally bigger, and 40~80 μm of partial size average out to, only fraction belongs to respirable dust；And ultra-fine dry powder particle
It is relatively small, 5~20 μm of partial size average out to, it is then relatively more to belong to respirable dust.When dry powder fire extinguishing agent is in the stream of high pressure nitrogen
Change effect is lower when spraying, under normal circumstances if a small amount of sucking floating dust, to body be do not have it is prejudicial；But if being formed
Dust shrouds, and is easy to lead to aspiration pneumonia and chemical pneumonia after sucking excessive fine particle.In the case of dust shrouds
Dry powder route of entry include: suck, eat, percutaneous absorbtion, the corresponding health hazard generated includes: dry powder steam or mist pair
The stimulation of eyes, mucous membrane and the upper respiratory tract, and neurological dysfunction may be caused after contact.
In addition, the recycling transfer device also use the dry powder in dry powder fire extinguishing agent transport experiment during not with
Gas componant generation chemically reacts this characteristic and is effectively reduced and transports based on isolated mode by dry powder formulation recycling and reusing
The cost of experiment.
Further, the recycling transfer device includes: separative unit, for separating the dry powder in the dry powder fire extinguishing agent
Ingredient and gas componant；And dry powder recovery bin, it is undertaken in the separative unit, for collecting storage by the separative unit point
The dry powder formulation separated out.
The separative unit 31 can be different from the physical property of gas componant by dry powder formulation, such as with certain body
Product, density are larger etc. dry powder formulation therein is screened after separate.Certainly, for bulky grain dry powder-little particle dry powder-
Gas is the dry powder fire extinguishing agent of ingredient, and the separative unit 31 can also be had between ingredient each under physical state of the same race at this time
Different physical properties and carry out screening separation.
Specifically, the separative unit can pass through solid-state when the dry powder fire extinguishing agent is solid-gas two-phase extinguishing chemical
Ingredient is different from the physical property of gaseous composition, such as is sieved to solid state component therein with certain volume, density are larger etc.
Choosing.And when the multiphase extinguishing chemical is bulky grain dry powder-little particle dry powder-gas three-phase extinguishing chemical, the separative unit is then
Multi-step can be divided to separate its multiple component, such as first with the difference of density between gas component and solids fraction,
Gas component is separated, the characteristic that volume is different between bulky grain dry powder and little particle dry powder is recycled, by its screening and filtering point
From.
Further, the separative unit includes: extinguishing chemical import, for the dry powder fire extinguishing agent to be imported the separation
Unit；Gas vent, for gas componant after separation to be exported the separative unit；And dry powder outlet, along vertical side
To the lower section for being located at the gas vent, for dry powder formulation after separation to be exported the separative unit.
The dry powder fire extinguishing agent does not limit the type of wherein gas componant strictly, i.e. the gas can be nitrogen, dioxy
Change carbon, inert gas or other be able to suppress the gas of combustion reaction；Certainly, the dry powder be also not necessarily limited to ammonium phosphate dry-powder,
Sodium bicarbonate, magnesium stearate or talcum powder etc., can also the type based on combustion reaction and flexibly choose.
Based on this, the separative unit 31 can use between gas componant and dry powder formulation density or with certain shape
The difference of shape, the two is separated.At this point, the dry powder outlet on the separative unit 31 can be located at the lower section of gas vent, into
And by the spacing between gas vent and dry powder outlet in vertical direction, it is not easy to dry powder formulation from higher gas vent
It overflows, to improve the separative efficiency of separative unit 31.
Further, the separative unit includes: cyclone separator, can be by turning effort by the gas-dry powder
Each ingredient in two-phase extinguishing chemical is separated by centrifugal force size；Inertial dust separator, can be by changing the gas-dry powder
The direction of motion of two-phase extinguishing chemical separates each ingredient by inertia size；And/or bag filter, it can be former based on filtering
Reason is separated each ingredient in the gas-dry powder two-phase extinguishing chemical by volume size.
Wherein the cyclone separator is also referred to as cyclone dust collectors, is a kind of dust removal with machine dust-extraction unit, and dust removal mechanism is
So that dust-contained airflow is rotated, grit is separated to from air-flow by means of centrifugal force and is trapped in wall, then make by gravity
With making grit fall into ash bucket.The cyclone separator has structure simple, and small volume is not required to special auxiliary device, cost compared with
Low, resistance is medium, and movement-less part in device operates the advantages that easy to maintenance.
Wherein the inertial dust separator is also known as inertial dust separator, is that dusty gas and baffle is made to hit or sharply change gas
Direction is flowed, the cleaner of dust is separated and trapped using inertia force.Due in movement air flow grit and gas have it is different
Inertia force, dusty gas zig zag or when colliding with certain barrier, the motion profile of grit is by the motion profile of pre- gas
It mutually separates, so that gas be made to be purified.
The inertial dust separator is divided into collision type and two kinds rotary.The former is to install one or multi-channel gear along airflow direction
Plate, dusty gas, which collides, separates grit from gas on baffle, it is clear that gas speed before bumping against baffle is got over
Height, lower after collision, then the dust carried is fewer, and efficiency of dust collection is higher.The latter is to make dusty gas that direction be varied multiple times, and is being turned
To dust separation is come out in the process, in this course, the radius of curvature of gas turns is smaller, and turning velocity is more, then removes
Dirt efficiency is higher.
The bag filter is a kind of dry filter device, and working principle is to compile object system with fiber using work principle of filter
The bag type filtering unit of work traps the dust in ash-laden gas.After dusty gas enters sack cleaner, particle is big, specific gravity
Big dust falls into ash bucket since the effect of gravity settles down, and the gas containing relatively fine dust is when passing through filtrate, powder
Dirt is by detention.Under the muffin layer of filter bag surface is deposited in the mechanical oscillation or air-flow blowback the effects of, it is detached from filter bag face, falls into ash
Bucket.
Certainly, the separative unit is also an option that the separator that gas-particle separation is carried out according to other principles, such as also
Gravitational precipitator, or the combination using above-mentioned cyclone separator 33, inertial dust separator and bag filter can be selected.
Further, the separative unit includes: level-one separation equipment, is provided with the first mixing extinguishing chemical import, first
Gas vent and the outlet of the first dry powder；And the second-order separation equipment, it is provided with the second mixing extinguishing chemical import, second gas outlet
It is exported with the second dry powder；Wherein, the second mixing extinguishing chemical import and the first gas outlet, to make described two
Grade separation equipment carries out secondary separation to through the isolated gas componant of the level-one separation equipment.
It to those skilled in the art, can be on the basis of the two-stage separation equipment of series relationship disclosed above
Expect carrying out plural serial stage on the basis of two-stage series connection, can further strengthen solid-gas separation effect.And it puts out a fire for multiphase
It, can be according to separation equipment to dry powder for agent, such as bulky grain dry powder-little particle dry powder-nitrogen extinguishing agent
The separating capacity of grain is sequentially connected in series, such as little particle dry powder can be subsequently isolated according to bulky grain dry powder is first separated,
Finally the mode that gaseous composition is dusted successively is separated three kinds of ingredients, to realize that classification recycles.And in order to protect
The purity of isolated gas componant is demonstrate,proved, the experiment porch can be sealed strictly, be put down at this time by the experiment of encapsulation process
Platform can also further avoid the leakage of the outwardly environment of dry powder fire extinguishing agent during the experiment.
Further, the level-one separation equipment includes: cyclone separator, for isolating in the dry powder fire extinguishing agent
The dry powder formulation of 5~15 microns of diameter of grain or more；The second-order separation equipment includes: bag filter, in the rotation
On the basis of the separation of stream separator, it is further separated out 0.4 micron of particle diameter or more of dry powder formulation.
The application uses the eddy flow current divider as the pre- dedusting of the first order, has structure simple, small volume is not required to spy
Different auxiliary device, the lower resistance of cost is medium, and movement-less part in device operates the advantages that easy to maintenance, is mainly used for trapping 5
~15 μm or more particles, efficiency of dust collection is up to 90% or more.And bag filter 34 is used as second level device for phase saparation, is mainly used for
The particle of 0.4 μm of trapping or more, it is insensitive to Dust Characteristics, is not easy to be influenced by Dust, concentration etc., efficiency of dust collection
Height, discharge are stablized.When dry powder-nitrogen extinguishing agent enters bag filter 34, the content of the dust in gas has been substantially reduced,
Gas-solid ratio increases, therefore the size of sack cleaner can be designed smaller, and efficiency of dust collection can reach 99% or more.
Further, the experiment porch further include: pressure regulation piping installation is set to going out for the pipeline experimental rig
Mouthful, it is provided with the first ball valve, the pressure for flowing through the dry powder fire extinguishing agent of itself can be adjusted.
The pressure regulation piping installation 21 can imitate the load of injection apparatus in the outlet of the pipeline experimental provision 2, from
And the experiment condition of the experiment pipe-line system is made to approach the operative scenario of true extinguishing device.
Specifically, enter multiphase flow state after the dry powder formulation in dry powder fire extinguishing agent is via fluidization treatment, it can be by
Approximately regard fluid as, therefore under the principle of the conservation of mass, when caliber increases, the flow velocity of multiphase flow will drop in pipeline
It is low, and pressure will increase；Correspondingly, the flow velocity of multiphase flow will will increase in pipeline, and pressure can then drop when caliber reduces
It is low.
Based on this, the pressure regulation piping installation 21 can control the pressure of wherein dry powder fire extinguishing agent by pipeline reducing diameter,
Again by controlling the aperture of first ball valve 211, pass through the recycling pretreatment unit 4 and subsequent the pressure loss it
With the load being equivalent to when assembling injector pressure.Therefore, during the experiment, the pipe first by choosing pressure regulation piping installation
The outlet load of the pipeline experimental provision 2 is demarcated, then carries out needle by the aperture of diameter and adjustment first ball valve
The load feelings of injection apparatus under true fire extinguishing environment can be simulated for the test of experiment pipeline or dry powder fire extinguishing agent intake condition
Condition.
It further, is the fluidization treatment for realizing dry powder formulation in the multiphase extinguishing chemical, the fluidisation blowing device packet
Include: streaming tank has dry powder formulation entrance, gas componant entrance and dry powder fire extinguishing agent outlet, for fluidizing dry powder formulation；
And high-pressure air source, the gas componant entrance is connected to by the second ball valve pressure-adjustable.
Further, the recycling transfer device includes: screw conveyor, is driven by motor, to by dry powder formulation from
The dry powder recovery bin is delivered to the dry powder formulation entrance of the streaming tank；And electric cabinet, the motor control can be passed through
The delivery rate of the spiral hauler.
The spiral hauler 35 be by changing the mechanical equipment that is transported of potential energy, can be used for it is conveying powdered,
Graininess and small block material.The spiral hauler 35 has rotary shaft, and helical blade is configured in the rotary shaft, leads to
Material can be carried out passage conveying by the turning effort for crossing helical blade.Compared with other conveying equipments, the spiral is transported
Machine 35 has that complete machine sectional dimension is small, good seal performance, run smoothly reliable, safe operation, simple and convenient for maintenance.
According to the requirement of the characteristic of conveyed material and conveying capacity, the recycling transfer device 3 can choose big-elevation,
There is screw conveyor shaft, so that the dry powder in the dry powder recovery bin 32 is smoothly transported to the streaming tank 11.Certainly, institute
It states spiral hauler 35 level-one can be used and transport, multistage group can also be taken according to the practical composition and arrangement of dust pelletizing system
It closes.
In addition to this, the recycling transfer device 3 can also be substituted with pipeline chain conveyor.The pipeline chain conveyor is volume
Formula conveying device, it can be achieved that material conveying and metering, have many advantages, such as compact-sized, occupy little space.The pipe chain conveying
Machine can make the mode of movement of horizontal inclination and vertical cartel according to actual needs, to change conveying side for greater flexibility
To.
Further, in order to realize better fluid effect, the dry powder formulation entrance of streaming tank position along the vertical direction
In the top of the gas componant entrance, the spiral, which transports machine, can promote the height of the dry powder formulation, and along vertical side
To the dry powder formulation is bet to the dry powder formulation entrance of the streaming tank from top to bottom.
As shown in Figure 1, the dry powder formulation of the streaming tank and gas componant entrance are located at the upper/lower terminal of itself,
It is fluidized in the streaming tank via sufficient mixing.
Further, it is provided with third ball valve 37 between the spiral hauler and the dry powder recovery bin, to control
The dry powder formulation is from the dry powder recovery bin 32 to the transhipment of the spiral hauler 35.
Further, the experiment porch further includes detecting and controlling system, and the detecting and controlling system includes: the first weighing
Device 41, to weigh the weight of the dry powder recovery bin；Second weighing device 42, to weigh the weight of the streaming tank；
Pressure measuring unit 43, to measure the outlet pressure of the pipeline experimental provision；Speed measuring device 44, to measure the recycling transhipment
The inlet velocity of device；And data acquisition device 45, communication connection is in first weighing device 41, the second weighing dress
The 42, pressure measuring unit 43 and the speed measuring device 44 are set, can acquire and the dry powder recovery bin is shown by display
32 weight, the weight of the streaming tank 11, the pipeline experimental provision 2 outlet pressure and the recycling transfer device 3
Inlet velocity.
First weighing device 41 and second weighing device 42 respectively by the dry powder recovery bin 32 with
And the weighing sensor of four-point supporting is set at the support of the streaming tank 11, it realizes to the dry powder recovery bin 32 and described
The real-time weight detecting of streaming tank 11.Using the weighing sensor as first weighing device 41 and described second weighs
Device 42 makes weight signal that can be input to the data acquisition dress in real time in the conveying experimentation of dry powder fire extinguishing agent
It sets, so as to the measured value based on streaming tank and dry powder recovery bin mass change, effective injection rate of accurate measurement dry powder
And dry powder is transporting the deposition in pipeline.
Also, first weighing device 41 directly measures the load-carrying variation of dry powder recovery bin 32, fluidizes compared to measurement
The load-carrying of tank 11 changes, and the accurate detection to dry powder injection transfer rate is more able to achieve from principle, because from dry powder streaming tank 11
To during dry powder bleed pipe road, it is constantly present the dry powder precipitating of pipeline.
Based on pressure measuring unit 43 in the test platform, the detection input of speed measuring device 44 and the pressure regulation piping installation
Regulatory function is supplied to the pipeline experimental provision 2 to simulate the working condition of dry powder injector load.The data acquisition
System is arranged to that the measured value of the pressure measuring unit 43, speed measuring device 44 can be acquired, and is used to the pressure regulation piping installation
21 carry out calibration adjustment；The measuring signal that first weighing device 41, the second weighing device 42 can also be acquired, thus in real time
Detect effective injection rate of dry powder.
Further, the first ball valve 211 in the pressure regulation piping installation 21, second in the fluidisation blowing device 1
Electric-controlled ball valve can be used in third ball valve 37 in ball valve 13 and the recycling transfer device 3, is based on this, the detection control
System further include: control device, communication connection are configured as in the data acquisition device: it can be returned based on the dry powder
Receive weight, the weight of the streaming tank 11, the outlet pressure of the pipeline experimental provision and the recycling transhipment dress in storehouse 32
The inlet velocity set, the driving speed of motor described in the process control by setting, and control first ball valve 211, described
The aperture of two ball valves 13 and the third ball valve 37.
Further, the dry powder fire extinguishing agent with excess energy, which is directly entered the recycling transfer device 3, will affect
To the separating effect of the recycling transfer device 3, it is based on this, the experiment porch can also include recycling pretreatment unit, energy
Enough be adjusted into it is described recycling transfer device the dry powder fire extinguishing agent state, with meet it is described recycling transfer device 3 into
Mouth requires.
The import requirement of the recycling transfer device 3 may include the particle ruler of pressure requirements, rate request, solid state component
Very little requirement etc..By taking particle size requirements therein as an example, when the solid state component of oversized particles size enters institute with certain speed
When stating recycling transfer device 3, since the sharp edges that solid state component agglomerates and is formed may be to opposite on recycling transfer device 3
Fragile structure damages, it is therefore necessary to carry out smashing processing to it in the recycling pretreatment unit.
Further, the recycling pretreatment unit can also include speed regulation pipeline, be set to the recycling transfer device 3
Entrance, export bigger pipe diameter with the fluidisation blowing device 1, the dry powder fire extinguishing agent for flowing through itself can be adjusted
Speed.
The speed regulation pipeline can improve the state when dry powder fire extinguishing agent enters the recycling transfer device 3, for example,
When level-one device for phase saparation selects cyclone separator 33 in the separative unit 31 of the recycling transfer device 3, the prionotron
The multiphase extinguishing chemical can be entered best effort of the entrance velocity control in 10~20m/s of the cyclone separator 33 by road
In range.
1 pair of technical solution provided by the invention is illustrated in more detail with reference to the accompanying drawing.
As shown in Figure 1, transporting the structural schematic diagram of experiment porch for multiphase extinguishing chemical provided by the present invention.It is divided into figure
Two car bodies in left and right, are provided with streaming tank and elevated pressure nitrogen gas source in the car body of left side, to prepare dry powder-nitrogen extinguishing agent,
And separator, dry powder recovery bin and spiral conveyance are then provided in the car body of right side.Separator in figure includes simultaneously
Row is set at the top of the dry powder recovery bin, using cyclone separator as the first order, using bag filter as the two-stage of the second level
Separation process.And the spiral conveyance in figure then be used to be transported in streaming tank from the dry powder recovery bin by dry powder.It is based on
The above-mentioned component of two car bodies setting, is distinguished one another with function, facilitates transition transport and the separation behaviour of the experiment porch
Make.
Dry powder fire extinguishing agent conveying experiment porch provided herein can on the basis of solving dry powder recycling problem, etc.
Size simulates the dry powder delivery system of fire fighting truck, Dual-Phrase Distribution of Gas olid in detection dry powder injection transfer rate, flow velocity, pressure and pipeline
Conveying characteristic carries out functional assessment and optimization design to the dry powder transport system of conventional dry powder fire fighting truck or elevating fire truck；
Recycling transfer device provided herein passes through the composition complementary of cyclone separator and bag filter, realization pair
The large scale recycling (recycling ratio is greater than 90%) of common dry powder and ultra-fine dry powder, makes the discharge gas of experiment porch meet environmental protection
It is required that and guarantee test personnel health；
Dry powder recovery bin provided herein can store simultaneously the isolate of cyclone separator and bag filter, and lead to
It crosses a screw elevator and the dry powder that recycling obtains is transported to streaming tank, make to recycle transfer device compact overall structure, recycling
Returning charge route is succinct, low cost, reliable for operation；
First weighing device and the second weighing device provided herein, can by directly measure dry powder recovery bin with
The load-carrying of streaming tank changes, and the accurate detection to dry powder injection transfer rate is not only realized from principle, but also can be with comparative analysis
The embodiment more than the precipitating situation of change of Pipeline transport dry powder combined during spray feed makes embodiments of the present invention
It is described in detail, but the present invention is not limited to described embodiment.For a person skilled in the art, this is not being departed from
A variety of variations, modification, equivalence replacement and modification are carried out still to these embodiments in the case where the principle and connotation of invention
It falls within protection scope of the present invention.
Claims (13)
1. a kind of dry powder fire extinguishing agent conveys experiment porch characterized by comprising
Blowing device is fluidized, for generating the dry powder fire extinguishing agent for injection；
Pipeline experimental rig is set to the outlet of the fluidisation blowing device, has removably pipe joint, to install to
Test transports pipeline；And
Transfer device is recycled, the outlet of the pipeline experimental rig is set to, the dry powder fire extinguishing agent can be collected, it will be described dry
Each ingredient in powder extinguishing chemical is disconnected from each other, and the dry powder formulation isolated is transported to the fluidisation blowing device.
2. experiment porch according to claim 1, which is characterized in that the recycling transfer device includes:
Separative unit, for separating dry powder formulation and gas componant in the dry powder fire extinguishing agent；And
Dry powder recovery bin is undertaken in the separative unit, the dry powder formulation isolated for collecting storage by the separative unit.
3. experiment porch according to claim 2, which is characterized in that the separative unit includes:
Extinguishing chemical import, for the dry powder fire extinguishing agent to be imported the separative unit；
Gas vent, for gas componant after separation to be exported the separative unit；And
Dry powder outlet, is located at the lower section of the gas vent along the vertical direction, for dry powder formulation after separation to be exported institute
State separative unit.
4. experiment porch according to claim 3, which is characterized in that the separative unit includes:
Cyclone separator, can be big by centrifugal force by each ingredient in the gas-dry powder two-phase extinguishing chemical by turning effort
It is small to be separated；
Inertial dust separator can keep each ingredient big by inertia by changing the direction of motion of the gas-dry powder two-phase extinguishing chemical
It is small to be separated；And/or
Each ingredient in the gas-dry powder two-phase extinguishing chemical can be pressed volume size based on work principle of filter by bag filter
It is separated.
5. experiment porch according to claim 3, which is characterized in that the separative unit includes:
Level-one separation equipment is provided with the first mixing extinguishing chemical import, first gas outlet and the outlet of the first dry powder；And
The second-order separation equipment is provided with the second mixing extinguishing chemical import, second gas outlet and the outlet of the second dry powder；
Wherein, the second mixing extinguishing chemical import and the first gas outlet, to make the second-order separation equipment
Secondary separation is carried out to through the isolated gas componant of the level-one separation equipment.
6. experiment porch according to claim 5, which is characterized in that the level-one separation equipment includes:
Cyclone separator, for isolating 5~15 microns of particle diameter or more in the dry powder fire extinguishing agent of dry powder formulation；
The second-order separation equipment includes:
Bag filter, on the basis of the separation of the cyclone separator, be further separated out 0.4 micron of particle diameter and
Above dry powder formulation.
7. experiment porch according to claim 1, which is characterized in that further include:
Pressure regulation piping installation is set to the outlet of the pipeline experimental rig, is provided with the first ball valve, can adjust and flow through itself
The dry powder fire extinguishing agent pressure.
8. experiment porch according to claim 2, which is characterized in that the fluidisation blowing device includes:
Streaming tank has dry powder formulation entrance, gas componant entrance and dry powder fire extinguishing agent outlet, is used for dry powder formulation stream
Change；And
High-pressure air source is connected to the gas componant entrance by the second ball valve pressure-adjustable.
9. experiment porch according to claim 8, which is characterized in that the recycling transfer device includes:
Screw conveyor is driven by motor, dry powder formulation is delivered to the dry of the streaming tank from the dry powder recovery bin
Meal component entrance；And
Electric cabinet can pass through the operation and delivery rate of spiral hauler described in the motor control.
10. experiment porch according to claim 9, which is characterized in that it is vertical that the dry powder formulation of the streaming tank enters opening's edge
Direction is located at the top of the gas componant entrance, and the spiral, which transports machine, can promote the height of the dry powder formulation, and edge
Vertical direction from top to bottom bets the dry powder formulation to the dry powder formulation entrance of the streaming tank.
11. experiment porch according to claim 9, which is characterized in that the spiral hauler and the dry powder recovery bin
Between be provided with third ball valve, to control the dry powder formulation from the dry powder recovery bin to the spiral hauler turn
Fortune.
12. experiment porch according to claim 9, which is characterized in that it further include detecting and controlling system, the detection control
System includes:
First weighing device, to weigh the weight of the dry powder recovery bin；
Second weighing device, to weigh the weight of the streaming tank；
Pressure measuring unit, to measure the outlet pressure of the pipeline experimental provision；
Speed measuring device, to measure the inlet velocity of the recycling transfer device；And
Data acquisition device, communication connection in first weighing device, second weighing device, the pressure measuring unit and
The speed measuring device can acquire and show the weight of the dry powder recovery bin, the weight of the streaming tank, institute by display
State the outlet pressure of pipeline experimental provision and the inlet velocity of the recycling transfer device.
13. experiment porch according to claim 12, which is characterized in that the detecting and controlling system further include:
Control device, communication connection are configured as in the data acquisition device: can be based on the weight of the dry powder recovery bin
The inlet velocity of amount, the outlet pressure of the weight of the streaming tank, the pipeline experimental provision and the recycling transfer device,
The driving speed of motor described in process control by setting, and control first ball valve, second ball valve and the third
The aperture of ball valve.
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| CN201910392551.XA CN110203699B (en) | 2019-05-13 | 2019-05-13 | A dry powder fire extinguishing agent delivery experimental platform |
| DE112020002360.5T DE112020002360T5 (en) | 2019-05-13 | 2020-03-02 | Test platform for conveying dry powder fire extinguishing agent |
| PCT/CN2020/077503 WO2020228394A1 (en) | 2019-05-13 | 2020-03-02 | Experiment platform for conveying of dry powder fire suppression agent |
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| CN201910392551.XA CN110203699B (en) | 2019-05-13 | 2019-05-13 | A dry powder fire extinguishing agent delivery experimental platform |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020228394A1 (en) * | 2019-05-13 | 2020-11-19 | 应急管理部上海消防研究所 | Experiment platform for conveying of dry powder fire suppression agent |
| CN114470586A (en) * | 2022-01-28 | 2022-05-13 | 三一汽车制造有限公司 | Fire extinguishing system and working machine |
| CN116873260A (en) * | 2023-08-21 | 2023-10-13 | 济俊消防科技有限公司 | A high-efficiency ultra-fine dry powder fire extinguishing agent production and filling equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114751220A (en) * | 2021-12-28 | 2022-07-15 | 安徽东爵有机硅有限公司 | Powder material conveying device and method |
| CN115791554B (en) * | 2023-01-06 | 2023-05-12 | 南京理工大学 | Powder dynamic concentration measuring device and method |
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| CN210557980U (en) * | 2019-05-13 | 2020-05-19 | 应急管理部上海消防研究所 | Experiment platform for conveying dry powder extinguishing agent |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202366367U (en) * | 2011-12-02 | 2012-08-08 | 公安部天津消防研究所 | Superfine dry powder fire extinguishing agent detection device |
| CN206837310U (en) * | 2017-05-10 | 2018-01-05 | 南京工业大学 | Small-size experimental device for testing extinguishing efficiency of dry powder extinguishing agent |
| CN207856575U (en) * | 2017-12-13 | 2018-09-14 | 苏州吴越合成消防科技有限公司 | A kind of dust removal by ventilation equipment for dry powder fire extinguishing agent production equipment |
| CN207694140U (en) * | 2018-04-25 | 2018-08-07 | 南京都盟消防技术有限公司 | A kind of fire-fighting foams device for detecting flowing property |
| CN110203699B (en) * | 2019-05-13 | 2024-06-07 | 应急管理部上海消防研究所 | A dry powder fire extinguishing agent delivery experimental platform |
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2019
- 2019-05-13 CN CN201910392551.XA patent/CN110203699B/en active Active
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2020
- 2020-03-02 WO PCT/CN2020/077503 patent/WO2020228394A1/en not_active Ceased
- 2020-03-02 DE DE112020002360.5T patent/DE112020002360T5/en active Pending
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| JPS6329667A (en) * | 1986-07-23 | 1988-02-08 | 能美防災株式会社 | Tester of powder fire extinguishing equipment |
| CN104071575A (en) * | 2013-03-25 | 2014-10-01 | 北新集团建材股份有限公司 | Loading system and loading method |
| US20170259092A1 (en) * | 2016-03-11 | 2017-09-14 | Shlomo Lalouz | Dry chemical closed recovery system for fire extinguisher service and related methods |
| CN107896361A (en) * | 2017-11-30 | 2018-04-10 | 何世容 | A kind of dry powder extinguisher recovery system and recovery method |
| CN210557980U (en) * | 2019-05-13 | 2020-05-19 | 应急管理部上海消防研究所 | Experiment platform for conveying dry powder extinguishing agent |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020228394A1 (en) * | 2019-05-13 | 2020-11-19 | 应急管理部上海消防研究所 | Experiment platform for conveying of dry powder fire suppression agent |
| CN114470586A (en) * | 2022-01-28 | 2022-05-13 | 三一汽车制造有限公司 | Fire extinguishing system and working machine |
| CN116873260A (en) * | 2023-08-21 | 2023-10-13 | 济俊消防科技有限公司 | A high-efficiency ultra-fine dry powder fire extinguishing agent production and filling equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110203699B (en) | 2024-06-07 |
| DE112020002360T5 (en) | 2022-01-27 |
| WO2020228394A1 (en) | 2020-11-19 |
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