CN101508899A - Fireproof combustion inhibitor special for forest steppe and method of preparing the same - Google Patents

Abstract

The invention discloses a special flame retardant used for the fire prevention in forest steppe and a preparation method thereof, wherein the special flame retardant comprises materials according to weight distribution ratio of 10-20 of phosphoric acid, 5-10 of carbamide and 0.04-0.079 of catalyst, and the phosphoric acid and the carbamide are polymerized by the action of the catalyst under the normal atmosphere to prepare powder agent or liquor agent. The special flame retardant has simple device, rapid preparation, convenient use, favorable flame-retarding fire-prevention and emergency fire-extinguishing effects, stronger adhesiveness and penetrability and durable fire-prevention effect. The special flame retardant is pre-sprayed on a fire-prevention strip covered by plants, such as flammable or sear trees, bushes and grassland vegetation, which can prevent fire hazards from happening from the origin; and the special flame retardant can also be confected rapidly into spraying medicament as emergency fire-extinguishing agent or temporary treatment emergency fire-prevention strip. The invention has high stability, environment protection, no toxicity and wide comfort zone, is suitable for territorial environments of different air temperature conditions and has long storage period, wherein, the powder agent can be stored for more than six years and the liquor agent can be stored for more than three years.

Description

Fireproof combustion inhibitor special for forest steppe and preparation method thereof

Technical field

The present invention relates to a kind of Forset and glassland fire generation that is used for taking precautions against in advance, delay, stop Forset and glassland fire to spread, the emergent preparation of Forset and glassland fire and preparation method thereof of putting out a fire to save life and property.

Background technology

According to statistics, the whole world is annual hill fire takes place to surpass 220,000 times, and 300,000,000 hectares～400,000,000 hectares of the total areas of overdoing burn area of woods more than 6,400,000 hectares, and about 9,000,000,000 tons phytomass is burnt.Occur in the forest fire in Greece, the U.S., Australia in the recent period, cause huge property damage and great international influence, the direct economic loss multi-million dollar has influence on normal production of millions of people and life, and the eco-catastrophe that causes can't be estimated especially.Over past ten years, be subjected to factor affecting such as climate warming especially, the occurrence frequency of global range hill fire and hazard rating obviously are expansion trend.

China takes place surplus the hill fire 10,000 every year, and more than 60 ten thousand hectares of the area of woods of being injured are because of calamity injures and deaths people more than 500.In March 2009 Winter Solstice in 2008, China part provinces and regions meet with the especially big damage caused by a drought that many decades is not met, and forest fire danger class continues higher, and hill fire continues to present and breaks out situation.

The hill fire that takes place because of factors such as thunders and lightnings originally is a kind of spontaneous phenomenon; but; the hill fire of China more than 99% is that production, the life owing to people causes accidentally with fire; its basic characteristics are: by the artificial naked light sylvosteppe surface-fire that ignites; surface-fire causes crown fire, will be if can not get timely control from little fire spreading to big fire at high-risk fire danger season, and in case form extra big forest fires; the intensity of a fire is promptly out of control, and countries in the world are all powerless at present.Therefore the control forest is with fiery, and spreading of surface-fire of control is China's sylvosteppe fp most important thing.

China's forest fire protection policy is " put prevention first, actively eliminate ", and the hill fire prevention is the prerequisite that prevents that hill fire from taking place.Than forestry developed countries such as the U.S., Canada, Portugal, China's forestry still is in the more rudimentary level of primary stage of socialism, forest fire protection work also is in primary level, the original backwardness of fire prevention means, prevention is defended to the last by extremely seeing, put out a fire to save life and property by tactics of human sea, though early warning technologies such as Forest Fire Using Satellite Data monitoring at present are applied, the anticipation and the precautionary measures of carrying out active for forest fires are still deficient.

Chemical is to utilize chemical agent or pulvis to put out a fire or block the method that hill fire spreads.

The fire-fighting principle of chemical is to play cooling, film forming, secluding air and dilution oxygen by fire-fighting medium decomposes after product, forest fires are suppressed or extinguish.

The chemical advantage is that blow-off velocity is fast, and effect is more much better than directly fire-fighting by water, and recrudescence rate is little.This method can be used for directly putting out multiple hill fires such as surface-fire, crown fire and underground fire, also can be used for offering the fire-blocking belt.Particularly meagrely-populated, ungetable remote districts utilize airplane spray chemical agent directly fire extinguishing or back-fire relief, are modern advanced measures.

Chemical is divided into fugitive fire-fighting medium and long-acting fire-fighting medium two classes.

Fugitive fire-fighting medium mainly changes the character (dilution and accent are glutinous) of water with chemical substance, just do not have the effect of fire extinguishing back-fire relief in case lose water.Behind the pharmacy application, cannot stand rain-out, can not be attached on the combustiblematerials for a long time, thereby the fire retardation of can not remaining valid for a long time.Customary thickeners has bentonite, phycocolloid, gill Ge Dejie rubber master batch to close Xylo-Mucine etc.

Long-acting fire-fighting medium is carrier with water, the main chemical agent that relies on is put out a fire, after water evaporates fully, chemical agent can be attached on the combustiblematerials, in some months, continue to play fire retardation, long-acting fire-fighting medium is a host with ammonium phosphate or ammonium sulfate, as: FOX is cut gram, Fa Erzhuoer, home-made " 704 " and " 75 " type fire-fighting medium etc.

Homemade " 704 " and " 75 " type fire-fighting medium are little because of viscosity, will make thickening material with bentonite etc. usually, need the configuration before Special Equipment be used, and time-consuming taking a lot of work is equipped with particular requirement to fire extinguishing during fire extinguishing, and perishable being difficult to of fire-protection equipment safeguards.

Long-term a large amount of chemical that uses can produce certain influence to the animals and plants of using in the regional ecosystem.The residual influence to environment of toxic substance is particularly far-reaching in sanitas in the chemical, thickening material, the pigment.

Chemical mainly shows following several respects to the influence of ecotope.

1) to the influence of plant and animal

After chemical is used in forest extinguishing, will certainly diffuse to soil, underground water and earth surface water source diffusion in every way, if the excessive use of fire-fighting medium and self degradative phase are long, can constitute greatly influence to soil chemistry elemental composition and water quality so, the consequence that is caused be exactly the soil nutrient composition by artificial destruction, directly influence growth and development of plants; Various source quality generation inversions, aquatic animals and plants nature living environment is on the hazard.

Long-term observation shows, is after the fire-fighting medium of host is sprayed on the vegetation in a large number with ammonium phosphate, ammonium sulfate, the trees blade face of can burning, and the blade face macula lutea occurs even comes off, and is can big area after green grass is excessively used withered; The plant that the generation animal is eaten spraying fire-extinguishing agent by mistake directly intoxicating phenomenon occurs behind the leaf.

In the period of 1987, the U.S. and Canada have used in forest extinguishing in a large number with ammonium phosphate, the poly-sour ammonium fire-fighting medium as host, find in the near future to use and occur a large amount of dead fish phenomenons in lake, region, the river, after testing, contain fire-fighting medium host composition in the dead fish, confirm that employed fire-fighting medium is dead fish arch-criminal.

2) to the influence of soil

With ammonium phosphate and ammonium sulfate is that the sulfate ion of fire-fighting medium can exist with the vitriolic form in soil, makes the reduction of P in soil H value, influences vegetation growth after the fire-fighting medium of host used; Elements such as iron, copper, zinc, magnesium combine in part of sulfuric acid root and the soil, form the solubility salt, are very easily taken away by rainwater in rainy season, cause the loss of soil nutrient elements.

Though the nitrogen element can not directly cause poisoning in the fire-fighting medium, under the effect of ground earth bacterium, can be transformed into nitric acid or nitrite, these salt are by plant absorbing and accumulation, and in the later stage of the season of growth, particularly dry season, vegetation can show intoxicating phenomenon.

3) to atmosphere and people's influence

The fire-fighting medium of ammonium salt-containing plays fire-retardant fireproof and does the time spent and can discharge the part ammonia, this is a kind of colourless and have the gas of intense stimulus stink, suck in a short time can occur shedding tears behind a large amount of ammonias, pharyngalgia, hoarseness, cough, sputum streaked with blood silk, uncomfortable in chest, expiratory dyspnea, with dizzy, headache, feel sick, vomiting, weak etc., pulmonary edema, adult respiratory distress syndrome can take place in severe patient; Simultaneously ammonia is a kind of alkaline matter, and it all has corrosion and hormesis to the skin histology that is contacted, but it is to atmospheric pollution level and to the influence of people, animal, much smaller than a large amount of poison gas that hill fire produced.

Fire-fighting medium is of a great variety, the fire-fighting medium that appears on the market at present all is to be used for fire extinguishing, only demand the loss that after fire takes place, as far as possible reduces fire, and really chemicals is applied to the fire-fighting medium that the prevention hill fire takes place, except that fire retardant of the present invention, application case still both at home and abroad.

Summary of the invention

The objective of the invention is at the above-mentioned existing problem that fire-extinguishing agent for forest exists that is used for, a kind of generation that is specifically designed to the prevention Forset and glassland fire is provided, fire retardant that delays, stops fire development and spread and preparation method thereof, this fire retardant environment-protecting asepsis, easily make easy-to-use and contain some fertilizer efficiency compositions, the growth that can be plant in the coming year provides certain nutrient.

For realizing the object of the invention, the invention provides a kind of fire retardant on the one hand, comprise following raw materials in weight portion: phosphatase 11 0-20; Urea: 5-10; Catalyzer: 0.04-0.07, wherein catalyzer comprises following raw materials in weight portion: sodium-chlor 0.5-0.7; Iron(ic) chloride 0.7-1; Zinc chloride 1.0-1.8; Tin chloride 0.3-0.6; Copper sulfate 1.0-1.35; Tai-Ace S 150 0.5-0.7; Boric acid 0.4-0.7.

Concentration of phosphoric acid selects 85%, and the concentration of urea selects 46%.

The auxiliary material that particularly also comprises following weight part proportioning: softening water 14-20 weight parts.

On the other hand, the invention provides the preparation method of above-mentioned fire retardant, comprise step: make under phosphoric acid and the effect of urea at atmospheric pressure state and carry out polyreaction at catalyzer.

Particularly, fire retardant method of the present invention comprises following step of carrying out in turn:

1) phosphoric acid is added in the reactor, heat when at the uniform velocity stirring, make temperature rise to 50-60 ℃;

2) in reactor, add urea, continue heated and stirred;

3) when temperature rises to 100-110 ℃, in reactor, add catalyzer, continue heated and stirred;

4) when temperature reaches 125-130 ℃, raw material reaction phenomenon in close observation still when continuing stirring, heating, the gas that question response still internal reaction thing produces because of reaction stops heating after making its volumetric expansion exhaust 3-5 times, opens the prolong cooling, continues to stir reactant is fully reacted;

5) when being cooled to 90-100 ℃, in reactor, add normal temperature softening water 14-20 weight parts, stir with prolong;

6) when temperature in the kettle to 70-80 ℃, to shut down and open the still sampling and detect, it is to be packaged that product is pumped into accumulator tank.

Particularly, fire retardant method of the present invention comprises following step of carrying out in turn:

1) phosphoric acid is added in the reactor, heat when at the uniform velocity stirring, make temperature rise to 50-60 ℃;

2) in reactor, add urea, continue heated and stirred;

3) when temperature rises to 100-110 ℃, in reactor, add catalyzer, continue heated and stirred;

4) when temperature reaches 125-130 ℃, continue to stir, raw material reaction phenomenon in the close observation still heating time, the gas that question response still internal reaction thing produces because of reaction stops heating after making its volumetric expansion exhaust 3-5 times, opens the prolong cooling, continue to stir, and pour out product;

5) the products therefrom crushed after being dried is encapsulated;

The concentration that wherein is used for sylvosteppe vegetation fire retardant behind the product thin up is preferably 20-25%.

Wherein, the speed control of stirring is at 75-80 rev/mins.

The advantage applies of fire retardant of the present invention is in the following areas:

1, highly effective flame-retardant: this fire retardant is sprayed onto the position that needs processing with common spraying equipment with it, can reaches good fire protection flame retarding and fire extinguishing effect.

2, environment-protecting asepsis: the main raw material of making fire retardant of the present invention is urea and industrial phosphoric acid, is the nontoxicity industrial chemicals, and releaser and finished product are all nontoxic in the production process.

3, smoke-suppressing is strong: the more important thing is that this fire retardant can significantly reduce the burst size of poison gas, alleviate poison gas disaster-stricken and the fire-fighting personnel that put out a fire to save life and property are injured, effectively reduce the pollution of poison gas to environment.

4, easily make easy-to-use: the production unit of this fire retardant is simple, only needs a urea glue reactor and supporting heating and cooling system just can produce, and the easy easy control of technology is reacted under the normal pressure, and security is high; This fire retardant finished product is as long as after adding cleaning water in proportion and being formulated into suitable concentration, agitation as appropriate evenly can be used, and is very convenient.

5, stable performance: this fire retardant storing temp is-12 ℃-50 ℃, and comfort zone is wide, and China various places all can be used; Stability is high, and the shelf lives is long, and pulvis can be stored more than 6 years, and liquor can store more than 3 years.

6, anti-pouncing on had both: fire retardant of the present invention can be sprayed at vegetation in advance; as: on inflammable, withered trees, the herbaceous vegetation; can control the generation of Forset and glassland fire from the source; also can be used as simultaneously emergent fire-fighting medium and emergent interim fire-blocking belt treatment agent, thus protection human valuable forest, range resource.

Fire retardant pulvis of the present invention is a water soluble preparation, can carry out the dissolving preparation of medicament under normal temperature condition

Embodiment

The invention will be further described below by embodiment.It should be understood that the described preparation method of the embodiment of the invention is only used for illustrating the present invention, rather than limitation of the present invention, the simple modifications to preparation method of the present invention under design prerequisite of the present invention all belongs to the scope of protection of present invention.

Embodiment 1

1) carrying out raw material by following weight proportion gets the raw materials ready:

Softening water 200kg

Phosphoric acid (concentration is 85%) 105kg

Urea (containing N amount 46%) 80kg

Catalyzer 0.5kg

Wherein, catalyzer is the light green pulvis of contriver's preparation, by with sodium-chlor 0.5 weight part; Iron(ic) chloride 0.7 weight part; Zinc chloride 1.2 weight parts; Tin chloride 0.4 weight part; Copper sulfate 1.2 weight parts; Tai-Ace S 150 0.5 weight part; Boric acid 0.6 weight part ground and mixed evenly forms.

2) phosphoric acid is added in the reactor, heat when at the uniform velocity stirring, make temperature rise to 50 ℃;

3) in reactor, add urea, continue heated and stirred;

4) when temperature rises to 110 ℃, in reactor, add catalyzer, continue heated and stirred;

5) when temperature reaches 125 ℃, raw material reaction phenomenon in close observation still when continuing stirring, heating, the gas that question response still internal reaction thing produces because of reaction stops heating after making its volumetric expansion exhaust 3-5 times, the cooling of unlatching prolong, continue to stir,, continue this moment to use prolong to carry out cooling in the still when temperature in the kettle shows in the still substance reaction climax mistake when vertex begins to descend, stir and do not stop, reactant is fully reacted;

6) when make temperature in the kettle to 100 ℃ with prolong cooling, in reactor, add the normal temperature softening water, stir;

7) when temperature in the kettle to 70 ℃, to shut down and open the still sampling and detect, it is to be packaged that product is pumped into accumulator tank.

During stirring, stirring velocity is controlled at 80 rev/mins.

The technical target of the product of products therefrom:

Outward appearance: colourless/light green liquid

Saturated solution concentration (%) 59

Admittedly contain (under the existing processing condition, %): 44

PH value (saturated aqueous solution, 22 ℃) 6.0

Viscosity (be coated with-4 glasss, 25 ℃, S) 11.20

Density (kg/cm ³) 1240

Fire retardant of the present invention before use, can be directly adding cleaning water by quality 1:1, to be diluted to concentration be 22%, stirs, and with atomizer it is sprayed directly on to need to handle on the vegetation get final product.

Embodiment 2

1) carrying out raw material by following weight proportion gets the raw materials ready:

Phosphoric acid (concentration is 85%) 105kg

Urea (containing N amount 46%) 65kg

Catalyzer 0.6kg

Wherein, catalyzer is the light green pulvis of contriver's preparation, by with sodium-chlor 0.6 weight part; Iron(ic) chloride 0.8 weight part; Zinc chloride 1.0 weight parts; Tin chloride 0.6 weight part; Copper sulfate 1.0 weight parts; Tai-Ace S 150 0.6 weight part; Boric acid 0.5 weight part ground and mixed evenly forms.

2) phosphoric acid is added in the reactor, heat when at the uniform velocity stirring, make temperature rise to 50 ℃;

3) in reactor, add urea, continue heated and stirred;

4) when temperature rises to 110 ℃, in reactor, add catalyzer, continue heated and stirred;

5) when temperature reaches 125 ℃, raw material reaction phenomenon in close observation still when continuing stirring, heating, the gas that question response still internal reaction thing produces because of reaction stops heating after making its volumetric expansion exhaust 3-5 times, the cooling of unlatching prolong, continue to stir, when beginning to descend, temperature in the kettle shows in the still substance reaction climax mistake, continue this moment to use prolong to carry out cooling in the still, and stir and do not stop, when 120 ℃ of temperature in the kettle, the observing response thing is discarded to mobile teel pallet under the reactant liquid state;

6) the mobile teel pallet that will carry reactant moves to the exhausting workshop and makes reactant reduce to normal temperature, takes out reactant, moves to the drying plant finish-drying and dries, and to the crushing packing workshop reactant is pulverized encapsulation again;

During stirring, stirring velocity is controlled at 80 rev/mins.

The technical target of the product of products therefrom:

Outward appearance: white powdery

Admittedly contain (%): 98

Bulk density (kg/cm ³) 750

PH value (saturated aqueous solution, 22 ℃) 6.0

Viscosity (saturated aqueous solution, 25 ℃, S) 11.20

Moisture (%)≤1

Fusing point (℃) 107

Fire retardant of the present invention before use, can directly adding cleaning water by quality 1:3 according to vegetation, to be diluted to concentration be 25%, perhaps adding cleaning water by quality 1:4, to be diluted to concentration be 20%, stirs, and with atomizer it is sprayed directly on to need to handle on the vegetation get final product.

Experimental example 1 (fire prevention demonstration)

Experiment title: Beijing's hill fire three of emergency preplan manoeuvre subject of putting out a fire to save life and property: the fire-retardant demonstration of fireproof combustion inhibitor special for forest steppe

Manoeuvre unit: Beijing's hill fire emergency preplan secondary response interlock department of putting out a fire to save life and property

Experimental period: on March 28th, 2007

Experiment place: combined training field, PLA sun mill

The place is described: mild soil, withered weeds about high 80cm, cover degree 80%, wind-force level Four

Experiment fire retardant: embodiment 1 flame retardant products is converted the fire retardant that cleaning water is mixed with 22% concentration by quality 1:1

Test instrument: power sprayer, gasoline lighter for ignition

Experiment purpose:

1, test is through with the target compound handled of experiment fire retardant, burns the combustion zone herbaceous plant and spreads to the target compound barriering effect to the intensity of a fire;

2, with power sprayer equipment experiment fire retardant, naked light in the manoeuvre is put out test, compare with the fire extinguishing effect of water.

Experimental design:

Burning word and fire-blocking belt is provided with

1, the fire prevention word is made: on the meadow with rope 10 meters square " fire prevention " two words of every word of drawing a design out, 4 meters of two word intervals, with the experiment fire retardant, the equipment power sprayer carries out atomized spray to the herbaceous plant in " fire prevention " two words, require to spray and accomplish that atomizing effect is good, target is evenly sprayed and do not had omission, and the experiment fire retardant after waiting to spray parches fully.

2, fire-retardant isolation strip is provided with: at 4 meters peripheries of " fire prevention " two word vertical ranges, with draw a design out the 2 meters wide fire-retardant isolation strip of closed rectangle of rope, 32 meters of fire-retardant isolation belt lengths, wide 18 meters, with the experiment fire retardant, the equipment power sprayer carries out atomized spray to herbaceous plant in the fire-retardant isolation strip, requires with experimental design 1;

3, the combustion zone is provided with: the combustion zone is the herbaceous plant of not spraying the experiment fire retardant in the fire-retardant isolation strip of rectangle; Ignition location is windward side, fire-retardant isolation strip in the combustion zone.

Experiment fire retardant sprinkling amount is 4 square metres/kilogram.

The experimenter lights sample prescription withered grass on every side with lighter for ignition in the windward side.

Experimental result:

1, " fire prevention " two words are intact substantially;

2, fire-retardant isolation strip is excellent;

3, all herbaceous plant are burned totally in the combustion zone.

4, with the water contrast test: fire retardant is sprayed at that naked light extinguishes at once on the naked light after atomizing, and no resume combustion phenomenon takes place, and the exhaust gas volumn of combustionmaterial generation obviously reduces than water extinguish open flame.

Experimental result shows that fireproof combustion inhibitor special for forest steppe of the present invention is very superior for the flame retardant properties of fire, and is used for emergent directly fire extinguishing effect also much larger than water.

Experimental example 2 (application test on the spot)

The experiment title: the fireproof combustion inhibitor special for forest steppe Hunchun is application test on the spot

Experimental unit: Yan Bianzhou Hunchun, Jilin Province Forest Fire Prevention Direction portion of forestry bureau

Experimental period: on October 7th, 2008

Letter forest farm 4 bottom classes of 110 blocks are respected by experiment place: E:130 ° 33 ' 19 " N:42 ° 31 ' 03 " Hunchun forestry bureau

The place is described: the mountain valley gently, 1.5 to 2M height grow thickly that reed, weeds are closely knit, fine, 3 grades of east wind, wind-force

Experiment fire retardant: embodiment 2 flame retardant products are converted the fire retardant that cleaning water is mixed with 25% concentration by quality 1:3

Test instrument: power sprayer, gasoline lighter for ignition

Experiment purpose:

The forest farm field test is through the target compound handled of experiment fire retardant, burns in the combustion zone vegetation and spreads to the target compound the obstructing capacity of the intensity of a fire, proves conclusively the effect on the spot of fire retardant.

Experimental design:

1, fire protection flame retarding isolation strip: with draw a design out 5 meters wide, the length of side of rope is 25 meters closed square fire protection flame retarding isolation strip, it in the isolation strip combustion zone, with the experiment fire retardant, the equipment power sprayer carries out atomized spray to herbaceous plant in the fire-retardant isolation strip, require to spray and accomplish that atomizing effect is good, target is evenly sprayed and do not had omission, and the experiment fire retardant after waiting to spray parches fully.

2, the combustion zone is provided with: the combustion zone is the square of length of side 20M, for not spraying the herbaceous plant of experiment fire retardant in 25 meters fire-retardant isolation strip of square of the length of side; Ignition location is windward side, fire-retardant isolation strip in the combustion zone.

Experiment fire retardant sprinkling amount is 2 square metres/kilogram.

The experimenter lights sample prescription withered grass on every side with lighter for ignition in the windward side.

Experimental result:

1, fire-retardant isolation strip is excellent;

2, herbaceous plant is burned totally substantially in the combustion zone.

Experimental result shows, fireproof combustion inhibitor special for forest steppe effect on the spot is fit to sylvosteppe fire prevention department and uses with to demonstrate test result early stage identical very much.

Experimental example 3 (weather conditions test)

This fire retardant is a water soluble preparation, and spontaneous phenomenons such as rain, snow, frost, dew produce influence in various degree will certainly for the flame retardant properties of fire retardant.For this reason, contriver and Sanhe City, Hebei forestry bureau cooperate, and year August in September, 2007 to 2008, carry out in Sanhe City, Hebei forestry bureau part woods pipe location.

Experimental design:

1, select the product of embodiment 2 for use, being mixed with concentration with cleaning water is 25% fire retardant;

2, select three place's forest form features to be mainly shrub, weeds (cover degree is 60～80%) woods pipe location in the Sanhe City, each is provided with 5 meters square sample ground everywhere, establishes 1 fire retardant 12 samples are altogether sprayed (numbering) with testing, and the sprinkling amount is 2 square metres/kilogram;

3, according to weather condition, as behind the sleet to the igniting test of sampling of numbering sample ground, with the flame retardant effect of detection fire retardant after above-mentioned inside even from weather.

Year August in September, 2007 to 2008 test period, the Sanhe City climate characteristic is: continue 10 days the historical same period of rare lasting dense fog in the historical same period of the rare cloudy weather for several days running that continues 15 days to mid-October in by the end of September, 2007, December; Interruption slight snow is arranged in January, 2008 to March frequently, mid-July to mid-August occurs repeatedly heavy showers.

Experimental result: under cloudy weather for several days running weather, the flame retardant effect of sample ground in the time of 10 days decreases, and the degree of overdoing is 48%, but still can play the effect of the fire-retardant isolation intensity of a fire; Under lasting dense fog situation, the flame retardant effect to fire of sample prescription is unaffected substantially; Many slight snows, the degree of overdoing on sample ground was 30% later to defrost end in the beginning of spring, and the flame retardant properties on sample ground is still good, and slight snow is also little to the influence of fire retardant; In the heavy showers process after in mid-July, 2008, extracted 6 sample ground and tested, the degree that overdoes is serious, test shows, and heavy showers repeatedly is bigger to the flame retardant properties influence of fire retardant.

Current description of test, do not having under the heavy showers situation, fire retardant (half a year) in a fire prevention phase can well play the effect that the intensity of a fire is isolated in fire preventing, from weather condition experimental period, fire retardant can adapt to local fire prevention phase planning (the fire prevention phase of northern China mostly be the 10 months first year at the beginning of by in by the end of May, second) well, cooperate local every measures for the prevention of fire, particularly fire retardant is sprayed in the planning in advance in emphasis fire prevention location, can play better and reduce fire generation probability, reduce the effect of fire losses.

" putting prevention first; actively eliminate " is the policy of China's forest fire protection, and the hill fire prevention is the prerequisite that prevents that hill fire from taking place, and fire retardant of the present invention is as the new technology of sylvosteppe fire-fighting, can make the fire-fighting work of China's sylvosteppe more positive, target is more run after fame really.

Claims (9)

1, a kind of fire retardant is characterized in that comprising following raw materials in weight portion: phosphatase 11 0-20; Urea: 5-10; Catalyzer: 0.04-0.07.

2, fire retardant as claimed in claim 1 is characterized in that: described catalyzer comprises following raw materials in weight portion: sodium-chlor 0.5-0.7; Iron(ic) chloride 0.7-1; Zinc chloride 1.0-1.8; Tin chloride 0.3-0.6; Copper sulfate 1.0-1.35; Tai-Ace S 150 0.5-0.7; Boric acid 0.4-0.7.

3, fire retardant as claimed in claim 1 or 2 is characterized in that also comprising the auxiliary material of following weight part: softening water 14-20.

4, a kind of preparation method as the arbitrary described fire retardant of claim 1 to 3 is characterized in that atmospheric pressure state makes phosphoric acid and urea carry out polyreaction under the effect of catalyzer.

5, a kind of preparation method of fire retardant as claimed in claim 1 or 2 is characterized in that comprising following step of carrying out in turn:

1) phosphoric acid is added in the reactor, heat when at the uniform velocity stirring, make temperature rise to 50-60 ℃;

2) in reactor, add urea, continue heated and stirred;

3) when temperature rises to 100-110 ℃, in reactor, add catalyzer, continue heated and stirred;

4) when temperature reaches 125-130 ℃, raw material reaction phenomenon in close observation still when continuing stirring, heating, the gas that question response still internal reaction thing produces because of reaction stops heating after making its volumetric expansion exhaust 3-5 times, opens the prolong cooling, continues to be stirred to reaction and finishes;

5) when being cooled to 90-100 ℃, in reactor, add normal temperature softening water 14-20 weight parts, stir with prolong;

6) treat temperature in the kettle to 70-80 ℃, shut down and open the still sampling and detect that it is to be packaged that product is pumped into accumulator tank.

6, method as claimed in claim 5 is characterized in that also comprising step: thin up is 40-50% to concentration in described product.

7, as claim 5 or 6 described methods, the speed control that it is characterized in that described stirring is at 75-80 rev/mins.

8, the preparation method of fire retardant as claimed in claim 1 or 2 is characterized in that comprising following step of carrying out in turn:

1) phosphoric acid is added in the reactor, heat when at the uniform velocity stirring, make temperature rise to 50-60 ℃;

2) in reactor, add urea, continue heated and stirred;

3) when temperature rises to 100-110 ℃, in reactor, add catalyzer, continue heated and stirred;

4) when temperature reaches 125-130 ℃, continue to stir, raw material reaction phenomenon in the close observation still heating time, the gas that question response still internal reaction thing produces because of reaction stops heating after making its volumetric expansion exhaust 3-5 times, opens the prolong cooling, continue to stir, and pour out product;

5) the products therefrom crushed after being dried is encapsulated.

9, method as claimed in claim 8, the speed control that it is characterized in that described stirring is at 75-80 rev/mins.