CN106563246B - It is a kind of using water mist as the hydro carbons ignition inhibitor of carrier - Google Patents

Abstract

The invention discloses a kind of using water mist as the soluble ignition inhibitor of carrier.The inhibitor includes following each component: potassium iodide, potassium bromide, sodium iodide, sodium bromide, any one or any two or more mixtures in urea: accounting for inhibitor solution mass percent is 20%-35%；Ethylenediamine tetra-acetic acid: accounting for inhibitor solution mass percent is 0.1%-0.5%；Sodium bicarbonate: accounting for inhibitor solution mass percent is 0.5%-1.0%；Rest part is water；Finally carbon dioxide is filled in inhibitor solution, pressure 0.7MPa-1.0MPa.The present invention successfully develops the soluble ignition inhibitor for being suitable for reducing the maximum explosion pressure of gaseous hydrocarbons, when exploding once being formed, can weaken blast pressure, to reduce injury of the explosion to periphery personnel and finance.

Description

It is a kind of using water mist as the hydro carbons ignition inhibitor of carrier

Technical field

The present invention relates to fire-fighting inhibitor, more particularly to a kind of using water mist as the hydro carbons ignition inhibitor of carrier.

Background technique

The gaseous hydrocarbons such as natural gas, liquefied petroleum gas are easy concurrent with air pre-mixing in the case where being abnormal leakage Raw explosion.The mode of fire department processing gas leakage at present is toward gas leakage region water spray.And generate the side of water mist Formula is usually generated using high pressure mode, the water mist that the water mist that this mode generates is generated relative to ultrasonic wave, water mist flow Greatly, it is easy to extinguish potential ignition source to avoid explosion；But the water mist partial size that this mode generates is relatively thick.Slightly The water mist of partial size is easy to be stirred the fuel gas leaked, makes itself and air pre-mixing, also, water mist will increase explosion The turbulent extent of cloud cluster.Therefore, once water mist is without that can extinguish potential ignition source and cause explosion, simultaneously because the work of water mist With gas burst pressure has rise phenomenon instead.This is totally unfavorable to fire-fighting rescue behavior.

It is mostly used superfine spray and superfine spray containing additive at present to inhibit gas burst.This kind of water mist producing method is general It is to be generated using ultrasonic activation water, water mist partial size is about 10 μm or so.This water mist yield is typically small, and partial size is small, holds Easily wave.And during fire-fighting rescue, in order to reach the purpose of Far Range, big yield (cool down, extinguish potential ignition source etc.), one As use the water mist that is generated by pressure.This water mist is generally relatively thicker, generally mostly at 200 μm or more.But the water of this partial size Mist can premix explosion gas, and explosion time once occurs and will increase explosion turbulent flow, thus cause blast pressure rising, This is totally unfavorable to fire-fighting emergency worker, to be improved.

Summary of the invention

In view of the problems existing in the prior art, the present invention researches and develops a kind of using water mist as the hydro carbons ignition inhibitor of carrier.

The present invention develops a series of using water mist as the hydro carbons ignition inhibitor of carrier on the basis of test of many times.It should Inhibitor is suitable for reducing the maximum explosion pressure of gaseous hydrocarbons, when exploding once being formed, can weaken blast pressure, to drop Injury of the low explosion to periphery personnel and property.The mechanism of this inhibitor is: since explosive reaction belongs to radical reaction, when When water mist is in explosive flame, water-soluble ignition inhibitor can adsorb the free radical that explosion generates, and cause radical chain anti- Partial interruption is answered, thus cut-off parts explosive reaction；Meanwhile high pressure carbon dioxide soluble in water can be after water mist jetting nozzle Extraneous additonal pressure is lost, and is quickly escaped in explosion high temperature, achievees the purpose that cooling and inerting explosion environment.These machines Reason synergistic effect achievees the purpose that reduce blast pressure.

The technical solution adopted by the present invention is that: it is a kind of using water mist as the hydro carbons ignition inhibitor of carrier, which is characterized in that should Inhibitor is made of following each component:

(1), potassium iodide, potassium bromide, sodium iodide, sodium bromide, the mixture of any one or more in urea: inhibition is accounted for Agent solution mass percent is 20%-35%；

(2), ethylenediamine tetra-acetic acid: accounting for inhibitor solution mass percent is 0.1%-0.5%；

(3), sodium bicarbonate: accounting for inhibitor solution mass percent is 0.5%-1.0%；

(4), rest part is water；

(5), carbon dioxide, pressure 0.7MPa-1.0MPa are filled in inhibitor solution.

The mechanism of action of each component in soluble ignition inhibitor is summarized as follows:

Datonation-inhibition medicament based on component (1), for the main component for interrupting explosion chain reaction free radical；Component (2) purpose is The calcium ions and magnesium ions in water are removed, the case where water mist equipment forms scale plug nozzle when used for a long time is slowed down；Component (3) is PH tune Agent is saved, water is adjusted to neutrality alkalescent, prevents the acidity of water from leading to the decomposition of component (1)；Component (4) is water, as molten Each component is dissolved in agent；There are two the purposes of component (5): first is the datonation-inhibition medicament of auxiliary, plays the role of that collaboration is datonation-inhibition, and reason is CO₂(carbon dioxide) under pressure can formation H soluble in water₂CO₃(carbonic acid) and CO₂Aqueous solution, the solution can be sprayed from nozzle Out, as water mist flies to explosion gas region, due to impressed pressure disappearance and the influence of blast process high temperature, CO₂It can be from Escaped in water, the oxygen content reduced in explosive gas forms quick inerting to explosion space, and test proves, component (1) and The datonation-inhibition effect of the collaboration of component (5) is significant, and effectiveness of explosion suppression is far longer than the effectiveness of explosion suppression that component (1) or component (5) is used alone. Second, compress the CO of storage₂As source pressure, the power of water spray is provided.

The beneficial effect comprise that: successfully develop be suitable for reduce gaseous hydrocarbons maximum explosion pressure can Dissolubility ignition inhibitor, so that blast pressure can be weakened when exploding once being formed, to reduce explosion to periphery personnel and wealth The injury of object.

Detailed description of the invention

Fig. 1 is the test equipment schematic diagram that the present invention uses:

Fig. 2 is 10% methane-air mixture unrestraint explosion overpressure curve graph；

Fig. 3 is 10% methane-air mixture explosion overpressure curve graph under the effect of simple water mist；

Fig. 4 is explosion overpressure curve graph of the present invention using formula 1；

Fig. 5 is explosion overpressure curve graph of the present invention using formula 6；

Fig. 6 is explosion overpressure curve graph of the present invention using comparison with formula 7；

Fig. 7 is explosion overpressure curve graph of the present invention using comparison with formula 8.

Specific embodiment

(1) it prepares main datonation-inhibition medicament: first proportionally calculating, get out water, EDTA(ethylenediamine tetraacetic is then added into water Acetic acid) 0.1%-0.5% stirring 3min after, add NaHCO₃(sodium bicarbonate) 0.5%-1.0% stirs 3min, adds KI(iodine Change potassium), KBr(potassium bromide), NaI(sodium iodide), NaBr(sodium bromide), urea any one either two or more mixtures 20%-35% is configured to inhibitor solution.

(2) prepared inhibitor solution is poured into autoclave, closed tank simultaneously accesses CO from pipeline₂Gas source, CO₂Meeting Inhibitor solution is gradually dissolved under high pressure, and CO is continuously replenished₂, so that pressure is stablized between 0.7MPa-1.0MPa.

(3) in use, nozzle is aligned and close to gaseous hydrocarbons dissipation region, water spray valve is opened, so that inhibitor It is sprayed onto gaseous hydrocarbons dispersive region from nozzle in a manner of water mist, to protect to explosive gas leakage region.

Test explanation explanation:

During the test that the present invention inhibits gas explosion, use closed explosive test case empty as explosion Between, water mist is generated using pressure-resistant tank body and subsidiary pipeline, hydraulic spray nozzle, uses air compressor machine or CO₂Gas cylinder comes to autoclave It pressurizes, pressure acquisition uses high-frequency pressure sensor (sample frequency 20000HZ, pressure limit -0.1MPa-1.5MPa). Test equipment is as shown in Figure 1.

For nozzle used under the pressure of 0.80MPa, particle size parameters are as shown in table 1, and flow is 1.31 L/min.

Table 1

Test 1: no inhibitor explosion

Medium is exploded with 10% Methane/air of premix to be tested.Condition of the simple premixed gas in unrestraint Lower explosion, explosion average pressure is about 0.64MPa, add simple water mist (partial size is about 200 μm, unchecked dose, atomisation pressure After 0.80MPa), test explosion average pressure is about 0.70MPa.The superpressure curve graph for listing two groups of Exploding tests, such as Fig. 2 and figure Shown in 3.Fig. 2 and Fig. 3 explanation, adds simple water mist after-explosion pressure to have the possibility of rising.This is because water mist is to explosion environment Stirring action, and the promotion to explosion environment turbulent flow, cause blast pressure to rise.This is unfavorable for fire-fighting rescue worker Factor.

Two groups of average burst pressures of gained as not plus datonation-inhibition medicament a reference value, for it is quick-fried after subsequent inhibiting Fried pressure compares.

Test 2: the explosion overpressure after addition inhibitor

Average explosion overpressure after being formulated using different agents is as shown in table 2.

Table 2

Note: (1) constituent mass percentage is the mass percent before adding carbon dioxide in solution in being respectively formulated.

(2) in source data blast pressure unit be bar, 1bar=0.1MPa, it is inverted in table 1, similarly hereinafter.

Effect is best to be formulated 1 in the above formula, lists one group of explosion overpressure curve, as shown in Figure 4.In formula 1 In Fig. 4 test, the blast pressure under the conditions of same explosion gas is reduced to 0.40MPa.Multiple groups explosion is done to formula 1 to survey Examination, average explosion overpressure are 0.45MPa.Inhibit relative to simple water mist, average burst pressure decline about 35.7%.

Test 3: as shown in table 3 using explosion overpressure average after inhibitor compound prescription.

Table 3

Note: constituent mass percentage is the mass percent before adding carbon dioxide in solution in formula.

6 one groups of explosion overpressure curves of formula are enumerated, as shown in Figure 5.Formula 6 is relative to formula 1, to the datonation-inhibition ability of methane It is weaker, but still have the function of certain inhibition explosion.

Test 4:CO₂Synergistic effect

By taking 30% potassium iodide as an example, under conditions of other conditions are constant, comparison dissolution CO₂Aqueous solution afterwards be free of CO₂The effect of aqueous solution.List file names with individual CO₂Aqueous solution effectiveness of explosion suppression is as a comparison.Test discovery: formula 1 in KI and CO₂The effect of synergistic effect is better than simple KI effectiveness of explosion suppression, also superior to simple CO₂The inhibitory effect of aqueous solution.Two groups pairs It is more as shown in table 4 than with the component of formula and average explosion overpressure.

Table 4

Note: (1) constituent mass percentage is the mass percent before adding carbon dioxide in solution in being respectively formulated.

(2) "-" is meant without the substance.

One group of blast pressure curve is enumerated respectively with formula 8 for comparison formula 7 and comparison, as shown in Fig. 6 and Fig. 7. As can be seen from Table 4, simple CO₂It pressurizes soluble in water, it is smaller to the reducing effect of blast pressure；It is used from formula 1 and comparison The test data of formula 7 is as it can be seen that use CO₂Have as driving gas and cooperates with datonation-inhibition effect.

The present invention is as follows using test equipment progress testing process:

Referring to Fig.1, the liquid medicine that will be prepared injects water pot 2 by injection port 1, uses CO₂Gas cylinder 3 or air compressor machine 4 are to water Tank 2 pressurizes.In this test data, pressure adds to 0.80MPa.Starting vacuum pump 5 is evacuated to negative pressure (in this test to explosion chamber 6 It is evacuated to -0.025MPa), fuel gas (methane is used in this test) is inputted from combustion gas bottle 7 using partial pressure method, so that pressure Force value is to -0.015MPa, in this way, according to the principle of partial pressure method, so that sample volume (in this test, uses within explosion limit Equivalent concentration), remaining negative pressure air polishing.When testing experiment, ball valve 8 is opened, allows water mist under the spray of explosive test chamber, then Electric spark 9 is opened, fuel gas is allowed to explode in explosive test chamber, pressure sensor 10 acquires pressure and reaches data actuation 11。

Claims (1)

1. a kind of using water mist as the hydro carbons ignition inhibitor of carrier, which is characterized in that the hydro carbons ignition inhibitor is with partial size It is carrier for 200 μm of water mists, which is made of following each component:

(1), it is molten potassium iodide, potassium bromide, sodium iodide, sodium bromide, the mixture of any one or more in urea: to account for inhibitor Liquid mass percent is 20%-35%；

(2), ethylenediamine tetra-acetic acid: accounting for inhibitor solution mass percent is 0.1%-0.5%；

(3), sodium bicarbonate: accounting for inhibitor solution mass percent is 0.5%-1.0%；

(4), rest part is water；

(5), carbon dioxide, pressure 0.7MPa-1.0MPa are filled in inhibitor solution.