CN113559452A - Aqueous film-forming foam extinguishing agent and preparation method thereof - Google Patents
Aqueous film-forming foam extinguishing agent and preparation method thereof Download PDFInfo
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- CN113559452A CN113559452A CN202110923124.7A CN202110923124A CN113559452A CN 113559452 A CN113559452 A CN 113559452A CN 202110923124 A CN202110923124 A CN 202110923124A CN 113559452 A CN113559452 A CN 113559452A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/0028—Liquid extinguishing substances
- A62D1/0035—Aqueous solutions
- A62D1/0042—"Wet" water, i.e. containing surfactant
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/0064—Gels; Film-forming compositions
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/0071—Foams
Abstract
The invention relates to the technical field of fire extinguishing agent preparation, in particular to an aqueous film-forming foam extinguishing agent and a preparation method thereof, which are characterized in that: the composition of the fire-extinguishing agent comprises, by weight, 5-15% of a combined hydrocarbon surfactant, 5-20% of a hydrocarbon surfactant without perfluorooctane sulfonyl compounds, 15-25% of a foaming agent, 0.3-0.9% of a protective colloid, 5-70% of urea, 5-8% of a foam stabilizer, 5-15% of an antifreeze agent, 3-5% of a solubilizer, 3-10% of a fire retardant and 20-40% of water, wherein the PFOS-free fluorocarbon surfactant is used, and the fire-extinguishing agent can be automatically degraded in a certain period of time, so that the fire-extinguishing agent has higher environmental friendliness, remarkably reduces environmental pollution and has excellent performance.
Description
Technical Field
The invention relates to the technical field of fire extinguishing agent preparation, in particular to an aqueous film-forming foam extinguishing agent and a preparation method thereof.
Background
The water film-forming foam extinguishing agent, also called light water foam extinguishing agent, has the best fire extinguishing effect due to the double fire extinguishing functions of the water film-forming and the foam. And because most of components in the water film-forming foam extinguishing agent are water, the foam extinguishing agent is taken as an ideal substitute of a Halon fire extinguishing agent in the international 'elimination of Halon action', and becomes a fire extinguishing agent which is mainly developed internationally.
The water film-forming foam extinguishing agent (AFFF for short) is a foam extinguishing agent which takes hydrocarbon surfactant and fluorocarbon surfactant as base materials and can form a water film on the surface of certain hydrocarbon liquids. The water film can play a role in extinguishing fire from three aspects: firstly, the contact between oil products and oxygen can be blocked, so that oil fire is extinguished due to oxygen deficiency; secondly, the evaporation of the water film can absorb a large amount of heat, so that the surface temperature of the oil product is greatly reduced; thirdly, the water film itself can restrain the volatilization of oil, further plays the effect of putting out a fire. In addition, the foam has a shielding effect on flame, and can effectively reduce heat radiation.
The aqueous film-forming foam extinguishing agent is suitable for extinguishing fire caused by water-insoluble liquid fuel, can be used together with a dry powder extinguishing agent, can be applied together with most fire-fighting foam extinguishing agents in the fire extinguishing process, can also be used for extinguishing large-scale oil tank fire in a submerged injection mode, and is widely suitable for preventing and extinguishing fires in airports, oil fields, large-scale chemical plants, chemical warehouses, oil depots, ships, docks and the like.
The fluorocarbon surfactant adopted in the existing aqueous film-forming foam extinguishing agent has extremely strong durability and can ensure that the extinguishing agent has high stability in various environments; however, the fluorocarbon surfactant has extremely poor degradation performance, is an organic pollutant which is difficult to decompose, and has great pollution to the environment, and when the aqueous film-forming foam extinguishing agent is prepared, the existing preparation method has low stirring efficiency in the process of mixing and stirring the materials, and often cannot achieve the expected mixing effect during stirring.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an aqueous film-forming foam extinguishing agent and a preparation method thereof, so as to solve the problems in the background technology.
The technical scheme of the invention is realized as follows: an aqueous film-forming foam extinguishing agent is characterized in that: the composition comprises, by weight, 5-15% of a combined hydrocarbon surfactant, 5-20% of a hydrocarbon surfactant without perfluorooctane sulfonyl compounds, 15-25% of a foaming agent, 0.3-0.9% of a protective colloid, 5-70% of urea, 5-8% of a foam stabilizer, 5-15% of an antifreeze agent, 3-5% of a solubilizer, 3-10% of a flame retardant and 20-40% of water.
Preferably: the composite hydrocarbon surfactant is alkyl glycoside and cocamidopropyl betaine, the hydrocarbon surfactant contains a fluorine polymer product, the foaming agent is alkyl glycoside and sodium dodecyl sulfate, the protective colloid is composed of microcrystalline chitin, sesbania gum and hydroxyethyl cellulose, the foam stabilizer is one or more of xanthan gum polysaccharide, alginate, carboxylated methyl cellulose, hydroxylated methyl cellulose, polyacrylate, polymaleate, polyvinylpyrrolidone, polyethylene glycol, polyvinyl alcohol and bentonite, the antifreeze agent is ethylene glycol, the solubilizer is diethylene glycol monobutyl ether, and the flame retardant is sodium tripolyphosphate.
A preparation method of an aqueous film-forming foam extinguishing agent is characterized by comprising the following steps:
s1, pre-watering: adding half of water with the mass fraction ratio into the reaction kettle;
s2, adding 1: weighing and adding a foaming agent, a combined hydrocarbon surfactant, a protective colloid and a hydrocarbon surfactant without perfluorooctane sulfonyl compound into a reaction kettle according to the mass fraction ratio, and then stirring;
s3, feeding 2: after the components in the step S2 are completely dissolved, weighing the components according to the mass fraction ratio, adding urea, a foam stabilizer and an antifreeze into the reaction kettle, and continuing stirring;
s4, feeding 3: after the components in the step S3 are completely dissolved, weighing the components according to the mass fraction ratio, adding the solubilizer and the flame retardant into the reaction kettle, and continuing stirring;
s5, supplementing water: supplementing and adding the rest water with the mass fraction ratio into the reaction kettle;
s6, fully stirring: stirring the mixture in the reaction kettle for 1 hour at a stirring speed of 500r/min to uniformly disperse the raw materials, and standing to obtain the product.
Preferably: the reation kettle in step S1 includes the cauldron body and locates the internal rabbling mechanism of cauldron, the rabbling mechanism includes fixed mounting in the first motor at cauldron body top, one end and first motor output pass through shaft coupling fixed connection and the other end runs through the first bull stick that extends to the internal portion of cauldron, be fixed in the liquid paddle that returns on the lateral wall of first bull stick lower extreme, locate the cauldron internal and with first bull stick upper end lateral wall fixed connection ' S commentaries on classics board, locate a plurality of rotatory cavitys on the commentaries on classics board, locate in every rotatory cavity and one end and rotatory cavity ' S inner wall rotate the link the puddler that the link extends to the rotatory cavity outside and locate in the rotatory cavity and the inner wall fixed connection other end of one end and rotatory cavity and the lateral wall fixed connection ' S of puddler torsion spring, the liquid paddle that returns is used for making the mixed liquid of cauldron body bottom upwards flow.
Preferably: the outer side wall of the stirring rod is fixedly connected with a plurality of connecting rods, stirring claws are abutted between adjacent connecting rods, the stirring claws are fixedly connected to a second rotating rod vertically arranged in the kettle body, a fixed plate fixedly connected to the inner walls of the two sides of the kettle body is horizontally arranged in the kettle body, one end of the second rotating rod penetrates through the fixed plate and is fixedly connected to the upper end surface of a supporting plate, the lower end of the supporting plate is fixedly connected with a movable rod, one end of the movable rod, far away from the supporting plate, is connected with a vibration assembly, the bottom of the vibration assembly is connected with a matching plate, the upper end surface of the matching plate is provided with a plurality of chopping grooves, each chopping groove is internally provided with a chopping rod, one end, far away from the chopping grooves, of the chopping rod is fixed on the lower end surface of the supporting plate, a first gear is fixed on the first rotating rod, and a second gear meshed with the first gear is fixed on the second rotating rod, the second rotating rod is fixedly connected with a penetrating position on the fixing plate.
Preferably: the utility model discloses a vibrations subassembly, including the upper end fixed connection vibrations casing with the cooperation board, install the vibrations seat in the vibrations casing, the upper end of vibrations seat and the one end fixed connection of keeping away from the backup pad of movable rod, fixedly connected with slider around the vibrations seat, set up the spout that can supply the slider embedding on the inner wall of vibrations casing, a plurality of telescopic links of lower extreme fixedly connected with of vibrations seat, and the other one end fixed connection of telescopic link is on the interior diapire of vibrations casing, the outside cover of telescopic link has return spring, return spring's both ends respectively with the lower extreme of vibrations seat and the interior diapire fixed connection of vibrations casing.
Preferably: a discharging mechanism is arranged at the bottom of the kettle body; the discharging mechanism comprises a liquid guide body which is arranged at the bottom of the kettle body and the side wall of which is of a hollow structure and an adjusting valve which is connected in the hollow structure of the liquid guide body in a sliding way, the regulating valve comprises a rotating pipe, a circle of tooth sheets arranged on the outer side of the upper part of the rotating pipe and a circle of through holes arranged on the lower part of the rotating pipe, the outer side wall of the upper part of the liquid guide body is provided with a ring-shaped groove which is convenient for exposing the tooth sheet, the inner side wall of the lower part of the liquid guide body is provided with an inner liquid outlet hole, the outer side wall is provided with an outer liquid outlet hole, the positions of the inner liquid outlet holes and the positions of the outer liquid outlet holes are matched with the positions of the through holes on the rotary tubes, the distance between every two adjacent inner liquid outlet holes or adjacent outer liquid outlet holes is equal to the distance between every two adjacent through holes on the rotary tubes, the outer side of the liquid guide body is uniformly provided with a plurality of split charging pipes connected with the outer liquid outlet holes, a second motor is fixed outside the liquid guide body, and a driving gear capable of being meshed with the tooth sheets is fixed on an output shaft of the second motor.
Preferably: the top of the cauldron body is equipped with feed mechanism, feed mechanism includes solid feed arrangement and liquid feed arrangement, solid feed arrangement include with the solid inlet pipe of cauldron body intercommunication, install the quantitative control subassembly that is used for controlling solid ration unloading in the solid inlet pipe, the quantitative control subassembly includes that fixed mounting just the output extends to the third motor in the solid inlet pipe on solid inlet pipe lateral wall, level set up in the inner wall rotation cylinder of being connected of the output coaxial center fixed connection other end of solid inlet pipe and one end and third motor and solid inlet pipe and set up on the side of cylinder and around the material receiving recess of the central pin isogonism of cylinder.
Preferably: the liquid feeding device comprises a feeding valve body group formed by a plurality of feeding valve bodies in an integrated mode, a water inlet and a discharge port arranged on the feeding valve body group, an electromagnetic control assembly arranged in each feeding valve body, and a negative pressure pump with an input end communicated with the discharge port, wherein the electromagnetic control assembly comprises an electromagnetic coil, a piston and an iron core arranged in a guide sleeve of the electromagnetic coil, a compression spring arranged between the piston and the iron core, and a piston cap arranged at the front end of the piston.
Preferably: the feeding valve comprises a feeding hole, a valve seat I, a valve seat II, an inner cavity and a channel, wherein the inlet side of the valve seat I is communicated with the feeding hole, one end of the channel is communicated with the water inlet, the other end of the channel is communicated with an inlet of the second valve seat, outlet sides of the first valve seat and the second valve seat are communicated with the inner cavity, the first valve seat and the second valve seat correspond to the electromagnetic control assembly, the outlet side of the first valve seat and the outlet side of the second valve seat coaxially correspond to each other in the inner cavity in an opposite way and are separated by a distance, a piston cap of the electromagnetic control assembly is positioned in the range of the separated distance between the outlet side of the first valve seat and the outlet side of the second valve seat, and the piston closes the first valve seat and opens the second valve seat under normal conditions, the inner cavity can be communicated with the discharge hole, the inner cavity of the feed valve split body can be communicated with the channel of the adjacent feed valve split body, and a flow meter is arranged in the feed port of each feed valve split body.
Has the advantages that: the invention uses PFOS-free fluorocarbon surfactant, the fire extinguishing agent can be degraded automatically in a certain period, thus having higher environmental protection, obviously reducing pollution to environment and having excellent performance, when preparing products, the adopted reaction kettle can flow the mixed liquid at the bottom of the kettle body upwards through the liquid return paddle to accelerate the turning and stirring speed of the mixed liquid, the combination of the arranged rotating plate and the stirring rod can accelerate the stirring effect, the combination of the arranged stirring claw and the second rotating rod can play the stirring effect, the matching of the arranged connecting rod and the stirring claw can enable the stirring rod to achieve the rotating effect through the interference of the stirring claw and the connecting rod, thereby further achieving the stirring effect through the rotation of the connecting rod, the combination of the arranged supporting plate, the matching plate, the chopping tank, the chopping rod, the movable rod and the vibration component, the device can play a role in stirring, the graduation can drive the mixed liquid in the kettle body to turn over, and further accelerate the stirring and mixing speed, the feeding mechanism arranged on the reaction kettle is divided into a solid feeding device and a liquid feeding device, so that the dry-wet separation before feeding is realized, the raw materials are prevented from being mixed and adhered to the pipe wall of the feeding pipe in advance, meanwhile, a quantitative control assembly is arranged in the arranged solid feeding device, the quantitative feeding of the solid raw materials can be realized, the manual weighing error is reduced, the accuracy of the product raw material proportioning is improved, the product quality is improved, the arranged liquid feeding device can respectively communicate various liquid raw materials to the feeding valve body group, each liquid raw material is in one-to-one correspondence with each feeding valve body and is respectively communicated with the feeding port on each feeding valve body, the liquid raw materials are fed into the primary stirrer by generating negative pressure when the liquid raw materials work through the negative pressure pump by controlling the electromagnetic control assembly on each feeding valve body, the efficiency of liquid raw material's feeding is improved, set up the flowmeter and can detect and mark the liquid raw material that gets into from the feed inlet, flowmeter and solenoid electric component's cooperation, the weight that every liquid raw material of steerable gets into one-level mixer, improve the accuracy of product raw material ratio, promote the quality of product, furthermore, each adjacent feed valve components of a whole that can function independently intercommunication sets up, when liquid raw material passes through each feed valve components of a whole that can function independently, each liquid raw material is premixed each other, improve each liquid raw material get into behind the one-level mixer with the misce bene speed of solid starting material, the effect of mixing has been improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the internal structure of a reaction vessel in an embodiment of the present invention;
FIG. 2 is a schematic diagram of an internal structure of a vibration assembly according to an embodiment of the present invention;
FIG. 3 is a sectional view of a connection structure of a control valve and a fluid guide according to an embodiment of the present invention;
FIG. 4 is a view showing the internal structure of a feed valve block according to an embodiment of the present invention;
fig. 5 is an enlarged view of a portion a in fig. 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Reference is made in detail to fig. 1-4 of the drawings for various embodiments of the invention.
The invention discloses an aqueous film-forming foam extinguishing agent, which comprises, by weight, 5-15% of a combined hydrocarbon surfactant, 5-20% of a hydrocarbon surfactant without perfluorooctane sulfonyl compounds, 15-25% of a foaming agent, 0.3-0.9% of a protective colloid, 5-70% of urea, 5-8% of a foam stabilizer, 5-15% of an antifreeze agent, 3-5% of a solubilizer, 3-10% of a flame retardant and 20-40% of water.
In a specific embodiment of the present invention, the combined hydrocarbon surfactant is alkyl glycoside and cocamidopropyl betaine, the hydrocarbon surfactant is a fluorine-containing polymer product, the foaming agent is alkyl glycoside and sodium dodecyl sulfate, the protective colloid is composed of microcrystalline chitin, sesbania gum and hydroxyethyl cellulose, the foam stabilizer is any one or more of xanthan gum polysaccharide, alginate, carboxylated methyl cellulose, hydroxylated methyl cellulose, polyacrylate, polymaleate, polyvinylpyrrolidone, polyethylene glycol, polyvinyl alcohol and bentonite, the antifreeze agent is ethylene glycol, the solubilizer is diethylene glycol monobutyl ether, and the flame retardant is sodium tripolyphosphate.
Example 1
An aqueous film-forming foam extinguishing agent comprises, by weight, 8% of a combined hydrocarbon surfactant, 12% of a hydrocarbon surfactant without perfluorooctane sulfonyl compounds, 15% of a foaming agent, 0.5% of a protective colloid, 25.5% of urea, 5% of a foam stabilizer, 5% of an antifreeze agent, 4% of a solubilizer, 3% of a flame retardant and 30% of water.
The preparation method of the aqueous film-forming foam extinguishing agent is characterized by comprising the following steps:
s1, pre-watering: adding half of water with the mass fraction ratio into the reaction kettle;
s2, adding 1: weighing and adding a foaming agent, a combined hydrocarbon surfactant, a protective colloid and a hydrocarbon surfactant without perfluorooctane sulfonyl compound into a reaction kettle according to the mass fraction ratio, and then stirring;
s3, feeding 2: after the components in the step S2 are completely dissolved, weighing the components according to the mass fraction ratio, adding urea, a foam stabilizer and an antifreeze into the reaction kettle, and continuing stirring;
s4, feeding 3: after the components in the step S3 are completely dissolved, weighing the components according to the mass fraction ratio, adding the solubilizer and the flame retardant into the reaction kettle, and continuing stirring;
s5, supplementing water: supplementing and adding the rest water with the mass fraction ratio into the reaction kettle;
s6, fully stirring: stirring the mixture in the reaction kettle for 1 hour at a stirring speed of 500r/min to uniformly disperse the raw materials, and standing to obtain the product.
By adopting the technical scheme, the PFOS-free fluorocarbon surfactant is used, and the fire extinguishing agent can be automatically degraded in a certain period, so that the environment-friendly fire extinguishing agent has higher environmental protection performance, obviously reduces the pollution to the environment and has excellent performance.
In a specific embodiment of the present invention, the reaction kettle in the step S1 includes a kettle body 1 and a stirring mechanism 2 disposed in the kettle body 1, where the stirring mechanism 2 includes a first motor 21 fixedly mounted on the top of the kettle body 1, a first rotating rod 22 having one end fixedly connected to an output end of the first motor 21 through a coupling and the other end extending into the kettle body 1, a liquid returning paddle 23 fixed to a lower end side wall of the first rotating rod 22, a rotating plate 24 disposed in the kettle body 1 and fixedly connected to an upper end side wall of the first rotating rod 22, a plurality of rotating cavities 25 disposed on the rotating plate 24, a stirring rod 26 disposed in each rotating cavity 25 and having one end rotatably connected to an inner wall of the rotating cavity 25 and extending to an outer side of the rotating cavity 25, and a torsion spring 27 disposed in the rotating cavity 25 and having one end fixedly connected to an inner wall of the rotating cavity 25 and the other end fixedly connected to a side wall of the stirring rod 26, the liquid returning paddle 23 is used for enabling the mixed liquid at the bottom of the kettle body 1 to flow upwards.
Through adopting above-mentioned technical scheme, after opening first motor, the output of first motor drives first bull stick and rotates, commentaries on classics board and the synchronous rotation of liquid paddle leaf and first bull stick on the first bull stick, connect the puddler in the rotatory cavity of commentaries on classics board and change the synchronous rotation of board, and then, the mixed liquid integument of cauldron body bottom returns the stirring of liquid paddle leaf and mixes, and simultaneously, make the mixed liquid of cauldron body bottom upwards flow, the puddler stirs with the combination of commentaries on classics board, mixed liquid integument stirs, can accelerate stirring effect.
In the embodiment of the invention, a plurality of connecting rods 28 are fixedly connected to the outer side wall of the stirring rod 26, a stirring claw 29 is abutted between adjacent connecting rods 28, the stirring claw 29 is fixedly connected to a second rotating rod 30 vertically arranged in the kettle body 1, a fixing plate 31 fixedly connected to the inner walls of two sides of the kettle body 1 is horizontally arranged in the kettle body 1, one end of the second rotating rod 30 penetrates through the fixing plate 31 and is fixedly connected to the upper end surface of a supporting plate 32, the lower end of the supporting plate 32 is fixedly connected with a movable rod 33, one end of the movable rod 33 far away from the supporting plate 32 is connected with a vibration assembly 34, the bottom of the vibration assembly 34 is connected with a matching plate 35, a plurality of chopping grooves 36 are arranged on the upper end surface of the matching plate 35, a chopping rod 37 is arranged in each chopping groove 36, one end of the chopping rod 37 far away from the chopping groove 36 is fixed on the lower end surface of the supporting plate 32, a first gear 38 is fixed on the first rotating rod 22, a second gear 39 meshed with the first gear 28 is fixed on the second rotating rod 30, and the second rotating rod 30 is fixedly connected with a penetrating part on the fixing plate 31.
By adopting the technical scheme, the matching plate generates tremor through the vibration assembly, a better stirring effect is achieved under the combined action of the chopping tank and the chopping rod, meanwhile, the moving of the matching plate can also bring the mixed liquid at the bottom of the kettle body to achieve the stirring effect, the chopping tank and the chopping rod can also chop aggregates in the mixed liquid, so that all raw materials are dissolved and mixed more thoroughly, the generation of conglomerate blocks in the mixed liquid is reduced, the combination of the arranged stirring claw and the second rotating rod can achieve the stirring effect, the matching of the arranged connecting rod and the stirring claw can enable the stirring rod to achieve the rotating effect through the collision of the stirring claw and the connecting rod, thereby further achieving the stirring effect through the rotation of the connecting rod, the arranged supporting plate, the matching plate, the chopping tank, the chopping rod, the movable rod and the vibration assembly can achieve the stirring effect, the mixed liquid in the kettle body can be driven to turn over from graduation, and the stirring and mixing speed is further increased.
In an embodiment of the present invention, the vibration assembly 34 includes a vibration housing 341 fixedly connected to an upper end surface of the matching plate 35, a vibration seat 342 is installed in the vibration housing 341, an upper end of the vibration seat 342 is fixedly connected to an end of the movable rod 33 far away from the supporting plate 32, a slider 343 is fixedly connected to a periphery of the vibration seat 342, a sliding groove 344 into which the slider 343 is inserted is formed in an inner wall of the vibration housing 341, a plurality of telescopic rods 345 are fixedly connected to a lower end of the vibration seat 342, another end of the telescopic rod 345 is fixedly connected to an inner bottom wall of the vibration housing 341, a return spring 346 is sleeved outside the telescopic rod 345, and two ends of the return spring 346 are respectively fixedly connected to a lower end of the vibration seat 342 and an inner bottom wall of the vibration housing 341.
Through adopting above-mentioned technical scheme, realized the upper and lower vibrations of cooperation board to reach efficient stirring effect, through the reciprocal flexible of telescopic link, make the vibrations seat in the vibrations casing produce reciprocating movement, and then make the vibrations casing produce the tremble, drive the cooperation board and shake from top to bottom, the return spring of setting, with the effect that the telescopic link produced, make the tremble effect of vibrations seat better.
In the specific embodiment of the invention, a discharging mechanism is arranged at the bottom of the kettle body 1; the discharging mechanism comprises a liquid guiding body 4 and a regulating valve 41, wherein the liquid guiding body 4 and the regulating valve 41 are arranged at the bottom of the kettle body 1, the side wall of the liquid guiding body is of a hollow structure, the regulating valve 41 comprises a rotating pipe 411, a circle of tooth sheets 412 arranged on the outer side of the upper part of the rotating pipe 411 and a circle of through holes 413 arranged on the lower part of the rotating pipe 411, the outer side wall of the upper part of the liquid guiding body 4 is provided with an annular groove 42 convenient for exposing the tooth sheets, the inner side wall of the lower part of the liquid guiding body 4 is provided with inner liquid outlet holes 43, the outer side wall of the upper part of the rotating pipe 411 is provided with outer liquid outlet holes 44, the positions of the inner liquid outlet holes 43 and the outer liquid outlet holes 44 are matched with the positions of the through holes 413 on the rotating pipe 411, the distance between the inner liquid outlet holes 43 or the outer liquid outlet holes 44 is equal to the distance between the adjacent two through holes 413 on the rotating pipe 411, the outer side of the liquid guiding body 4 is uniformly provided with a plurality of sub-distributing pipes 45 connected to the outer part of the outer liquid outlet holes 44, the liquid guiding body 4 is fixed with a second motor 46, a drive gear 47 capable of meshing with the teeth 412 is fixed to an output shaft of the second motor 46.
Through adopting above-mentioned technical scheme, start step motor after the stirring ratio, utilize step motor to drive the governing valve and rotate, and then the outer, interior liquid hole of going out of interval a period intercommunication, the intercommunication time is used for the partial shipment consuming time, and the interval time is used for carrying, convenient operation, effectively realizes mixing liquid's quick automatic partial shipment through this kind of low-cost mode.
In a specific embodiment of the present invention, a feeding mechanism 5 is disposed at the top of the kettle body 1, the feeding mechanism 5 includes a solid feeding device 51 and a liquid feeding device 52, the solid feeding device 51 includes a solid feeding pipe 511 communicated with the kettle body 1, a quantitative control component 512 for controlling quantitative solid feeding is installed in the solid feeding pipe 511, the quantitative control component 512 includes a third motor 5121 fixedly installed on the outer side wall of the solid feeding pipe 511, an output end of the third motor 5121 extends into the solid feeding pipe 511, a drum 5122 horizontally disposed on the solid feeding pipe 511, one end of the drum 5122 is coaxially and fixedly connected with the output end of the third motor 5121, and the other end of the drum 5122 is rotatably connected with the inner wall of the solid feeding pipe 511, and a material receiving groove 5123 opened on the side surface of the drum 5122 and equiangularly arranged around the central axis of the drum 5122.
Through adopting above-mentioned technical scheme, the feed mechanism who sets up on the reation kettle divide into solid feed arrangement and two kinds of modes of liquid feed arrangement, make dry wet separation before reinforced, prevent that the raw materials from mixing in advance and gluing on the pipe wall of filling tube, and simultaneously, be provided with quantitative control subassembly in the solid feed arrangement of setting, can carry out the ration to the raw materials of solid and annotate, reduce artificial weighing error, improve the accuracy of product raw materials ratio, promote the quality of product, open the third motor, the output of third motor drives the cylinder and rotates, solid raw materials drops in connecing the material recess, through the rotation of the output of third motor, make and connect the solid raw materials in the material recess to fall in the guide tube, through the number of turns of rotation of control third motor output, reach the quantitative unloading of control solid raw materials.
In the embodiment of the present invention, the liquid feeding device 52 includes a feeding valve body group 521 integrally formed by a plurality of feeding valve sub-bodies 6, a water inlet 522 and a discharge outlet 523 provided on the feeding valve body group 521, an electromagnetic control assembly 524 provided in each feeding valve sub-body 6, and a negative pressure pump 525 having an input end communicated with the discharge outlet 523, where the electromagnetic control assembly 524 includes an electromagnetic coil 5241, a piston 5242 and an iron core 5243 provided in a guide sleeve of the electromagnetic coil 5241, a compression spring 5244 provided between the piston 5242 and the iron core 5243, and a piston cap 5245 provided at a front end of the piston 5242.
In the embodiment of the present invention, the inlet valve split bodies 100 each include an inlet 101, a first valve seat 102, a second valve seat 103, an inner cavity 104 and a passage 105, an inlet side of the first valve seat 102 communicates with the inlet 101, one end of the passage 105 communicates with the inlet 522, the other end of the passage 105 communicates with the inlet of the second valve seat 103, outlet sides of the first valve seat 102 and the second valve seat 103 communicate with the inner cavity 104, the first valve seat 102 and the second valve seat 103 correspond to the solenoid control assembly 524, an outlet side of the first valve seat 102 and an outlet side of the second valve seat 103 coaxially correspond to each other in the inner cavity at a distance, a piston cap 5245 of the solenoid control assembly 524 is located in a range of the distance between the outlet side of the first valve seat 102 and the outlet side of the second valve seat 103, and in a normal state, the piston 5242 closes the first valve seat 102 and opens the second valve seat 103, the inner cavity 104 can communicate with the outlet 523, the inner cavity 104 of the inlet valve split body 100 can communicate with the passage 105 of the adjacent inlet valve split body 100, a flow meter 200 is arranged in the feed port 101 of each feed valve split body 100.
By adopting the technical scheme, various liquid raw materials can be respectively communicated to the feeding valve body group, each liquid raw material is in one-to-one correspondence with each feeding valve split body and is respectively communicated with the feeding hole on each feeding valve split body, and the liquid raw materials are fed into the primary stirrer by generating negative pressure when the liquid raw materials work through the negative pressure pump by controlling the electromagnetic control assembly on each feeding valve split body, so that the feeding efficiency of the liquid raw materials is improved;
when the electromagnetic coil is electrified, the piston is attracted by the magnetic iron core, the compression spring is compressed, the piston retracts, the rear side of the piston cap is close to the outlet side of the valve seat II, the front side of the piston cap leaves the outlet side of the valve seat I, namely the piston cap closes the valve seat II to open the valve seat I, the negative pressure pump is started to generate negative pressure, so that liquid raw materials can enter the inner cavity from the feeding hole, enter the inner cavity through the valve seat I, enter the channel of the adjacent feeding valve split bodies and then enter the inner cavity of the adjacent feeding valve split bodies, sequentially pass through the plurality of feeding valve split bodies, and are guided into the discharging hole from the inner cavity of the last feeding valve split body until entering the material guide pipe; when the electromagnetic coil is not electrified, the piston and the iron core extend forwards under the action of the compression spring, the front side of the piston cap is close to the outlet side of the first valve seat, the rear side of the piston cap leaves the outlet side of the second valve seat, the first valve seat is closed by the machine piston cap, the second valve seat is opened, water is introduced into the water inlet pipe, enters the inner cavity through the first valve seat via the channel, enters the channel of the adjacent feed valve split body, enters the inner cavity of the adjacent feed valve split body via the channel of the adjacent feed valve split body, sequentially passes through the plurality of feed valve split bodies, is introduced into the discharge port from the inner cavity of the last feed valve split body until entering the material guide pipe, and then cleaning of the pipeline is completed, the flow meter is arranged to detect and calibrate the liquid raw materials entering from the feed port, and the matching of the flow meter and the electromagnetic control assembly can control the amount of each liquid raw material entering the primary stirring machine, the accuracy of product raw material ratio is improved, and the quality of the product is improved.
It should be noted that: when liquid raw materials are fed, the water inlet pipe is in a sealed state.
In conclusion, the invention provides an aqueous film-forming foam extinguishing agent and a preparation method thereof, the PFOS-free fluorocarbon surfactant is used, the extinguishing agent can be automatically degraded in a certain period, so that the aqueous film-forming foam extinguishing agent has higher environmental protection performance, obviously reduces the pollution to the environment and has excellent performance, and the product obtained by the preparation method has uniform mixing, high precision of raw material proportioning and no aggregation and agglomeration phenomenon during mixing and stirring.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. An aqueous film-forming foam extinguishing agent is characterized in that: the composition comprises, by weight, 5-15% of a combined hydrocarbon surfactant, 5-20% of a hydrocarbon surfactant without perfluorooctane sulfonyl compounds, 15-25% of a foaming agent, 0.3-0.9% of a protective colloid, 5-70% of urea, 5-8% of a foam stabilizer, 5-15% of an antifreeze agent, 3-5% of a solubilizer, 3-10% of a flame retardant and 20-40% of water.
2. An aqueous film-forming foam fire suppressant according to claim 1 wherein: the composite hydrocarbon surfactant is alkyl glycoside and cocamidopropyl betaine, the hydrocarbon surfactant contains a fluorine polymer product, the foaming agent is alkyl glycoside and sodium dodecyl sulfate, the protective colloid is composed of microcrystalline chitin, sesbania gum and hydroxyethyl cellulose, the foam stabilizer is one or more of xanthan gum polysaccharide, alginate, carboxylated methyl cellulose, hydroxylated methyl cellulose, polyacrylate, polymaleate, polyvinylpyrrolidone, polyethylene glycol, polyvinyl alcohol and bentonite, the antifreeze agent is ethylene glycol, the solubilizer is diethylene glycol monobutyl ether, and the flame retardant is sodium tripolyphosphate.
3. The method of claim 1, wherein the method comprises the steps of:
s1, pre-watering: adding half of water with the mass fraction ratio into the reaction kettle;
s2, adding 1: weighing and adding a foaming agent, a combined hydrocarbon surfactant, a protective colloid and a hydrocarbon surfactant without perfluorooctane sulfonyl compound into a reaction kettle according to the mass fraction ratio, and then stirring;
s3, feeding 2: after the components in the step S2 are completely dissolved, weighing the components according to the mass fraction ratio, adding urea, a foam stabilizer and an antifreeze into the reaction kettle, and continuing stirring;
s4, feeding 3: after the components in the step S3 are completely dissolved, weighing the components according to the mass fraction ratio, adding the solubilizer and the flame retardant into the reaction kettle, and continuing stirring;
s5, supplementing water: supplementing and adding the rest water with the mass fraction ratio into the reaction kettle;
s6, fully stirring: stirring the mixture in the reaction kettle for 1 hour at a stirring speed of 500r/min to uniformly disperse the raw materials, and standing to obtain the product.
4. The method of claim 3 wherein the foam extinguishing agent is prepared by the following steps: the reaction kettle in the step S1 comprises a kettle body and a stirring mechanism arranged in the kettle body, wherein the stirring mechanism comprises:
the first motor is fixedly arranged at the top of the kettle body;
one end of the first rotating rod is fixedly connected with the output end of the first motor through a coupler, and the other end of the first rotating rod penetrates through the kettle body and extends into the kettle body;
the liquid return paddle is fixed on the side wall of the lower end of the first rotating rod;
the rotating plate is arranged in the kettle body and is fixedly connected with the side wall of the upper end of the first rotating rod;
a plurality of rotating cavities arranged on the rotating plate;
the stirring rods are arranged in each rotary cavity, and one end of each stirring rod is rotatably connected with the inner wall of each rotary cavity and extends to the outer side of each rotary cavity;
the torsion spring is arranged in the rotary cavity, one end of the torsion spring is fixedly connected with the inner wall of the rotary cavity, and the other end of the torsion spring is fixedly connected with the side wall of the stirring rod;
wherein, the liquid return paddle is used for enabling the mixed liquid at the bottom of the kettle body to flow upwards.
5. The method of claim 4 wherein the agitation mechanism further comprises:
the connecting rods are provided with a plurality of connecting rods and fixedly connected to the outer side wall of the stirring rod;
the stirring claws are abutted between the adjacent connecting rods;
the fixing plates are horizontally arranged in the kettle body and fixedly connected to the inner walls of the two sides of the kettle body;
the second rotating rod is vertically arranged in the kettle body, one end of the second rotating rod penetrates through the fixed plate and is fixedly connected to the upper end surface of a supporting plate for fixedly connecting the stirring claw;
one end of the movable rod is fixedly connected to the lower end of the supporting plate;
the vibration assembly is connected to one end, far away from the supporting plate, of the movable rod;
the matching plate is connected to the bottom of the vibration assembly;
a plurality of shredding grooves provided on the upper end surface of the mating plate;
the chopping rods are correspondingly arranged in the chopping grooves, and one end of each chopping rod, which is far away from the chopping grooves, is fixed on the lower end surface of the supporting plate;
the first gear is fixedly sleeved on the first rotating rod;
the second gear is fixedly sleeved on the second rotating rod and is meshed with the first gear;
wherein, the second bull stick is fixed connection with the department of running through on the fixed plate.
6. The method of claim 5 wherein the vibrating assembly comprises:
the vibration shell is fixedly connected with the upper end face of the matching plate;
the vibration seat is arranged in the vibration shell, and the upper end of the vibration seat is fixedly connected with one end of the movable rod, which is far away from the supporting plate;
the sliding block is fixedly connected to the periphery of the vibration seat;
the sliding groove is formed in the inner wall of the vibration shell and can be used for being embedded by the sliding block;
the plurality of telescopic rods are arranged, one end of each telescopic rod is fixedly connected to the lower end of the vibration seat, and the other end of each telescopic rod is fixedly connected to the inner bottom wall of the vibration shell;
and the return spring is sleeved on the outer side corresponding to the telescopic rod, and two ends of the return spring are respectively fixedly connected with the lower end of the vibration seat and the inner bottom wall of the vibration shell.
7. The method for preparing the aqueous film-forming foam extinguishing agent according to claim 4, wherein a discharging mechanism is arranged at the bottom of the kettle body; the discharge mechanism comprises:
the liquid guide body is arranged at the bottom of the kettle body, and the side wall of the liquid guide body is of a hollow structure;
the regulating valve is connected in the hollow structure for guiding the liquid in a sliding way;
the regulating valve includes:
pipe rotation;
the tooth sheets are provided with a plurality of tooth sheets and are arranged on the outer side of the upper part of the rotating pipe around the axis of the rotating pipe;
the through holes are provided with a plurality of through holes and are arranged at the lower part of the rotating pipe around the axis of the rotating pipe;
the annular groove is formed in the outer side wall of the upper part of the liquid guide body, and is convenient for exposing the tooth piece;
the inner liquid outlet hole is formed in the inner side wall of the lower part of the liquid guide body;
the liquid outlet hole is formed in the outer side wall of the lower part of the liquid guide body;
the sub-packaging pipes are correspondingly connected with the outer liquid outlet holes and are uniformly arranged on the outer side of the liquid guide body;
the second motor is fixed outside the liquid guide body;
the driving gear is fixedly sleeved on an output shaft of the second motor and can be meshed with the tooth sheet;
wherein, interior play liquid hole, go out the position of liquid hole and through-hole on the rotary pipe and cooperate, adjacent two interior play liquid hole or the interval of going out the liquid hole equals with adjacent two the interval of through-hole on the rotary pipe.
8. The method for preparing the aqueous film-forming foam extinguishing agent according to claim 4, wherein the top of the kettle body is provided with a feeding mechanism, and the feeding mechanism comprises: a solid feed device and a liquid feed device;
the solid feed device comprises:
the solid feeding pipe is communicated with the kettle body;
the quantitative control assembly is arranged in the solid feeding pipe and is used for controlling the quantitative blanking of the solid;
the quantitative control assembly comprises:
the third motor is fixedly arranged on the outer side wall of the solid feeding pipe, and the output end of the third motor extends into the solid feeding pipe;
the roller is horizontally arranged in the solid feeding pipe, one end of the roller is fixedly connected with the output end of the third motor coaxially, and the other end of the roller is rotatably connected with the inner wall of the solid feeding pipe;
connect the material recess, set up on the side of cylinder and around the equal angle setting of the center pin of cylinder.
9. The method of claim 8 wherein the liquid feed means comprises:
the feeding valve body group is formed by a plurality of feeding valves in a split and integrated mode;
the water inlet and the discharge port are arranged on the feeding valve body group;
the electromagnetic control assembly is arranged in each feeding valve sub-body;
the input end of the negative pressure pump is communicated with the discharge hole;
the electromagnetic control assembly comprises:
an electromagnetic coil having a guide sleeve thereon;
the piston and the iron core are arranged in the guide sleeve of the electromagnetic coil;
a compression spring disposed between the piston and the core;
and the piston cap is arranged at the front end of the piston.
10. The method of claim 9 wherein the inlet valve segments each comprise an inlet port, a first valve seat, a second valve seat, an interior chamber and a passageway; the inlet side of the first valve seat is communicated with the feed inlet, one end of the channel is communicated with the water inlet, the other end of the channel is communicated with the inlet of the second valve seat, the outlet sides of the first valve seat and the second valve seat are communicated with the inner cavity, the first valve seat and the second valve seat correspond to the electromagnetic control assembly, the outlet sides of the first valve seat and the second valve seat correspond to each other in the inner cavity in a coaxial line mode and are spaced by a distance, a piston cap of the electromagnetic control assembly is located in the range of the spaced distance between the outlet side of the first valve seat and the outlet side of the second valve seat, the first valve seat is closed by a piston in a normal state, the second valve seat is opened, the inner cavity can be communicated with the discharge port, the inner cavity of the split feed valve can be communicated with the channel of the split adjacent feed valve, and a flow meter is arranged in the feed port of the split feed valve.
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