Method and device for emulsifying emulsion explosive

Abstract

The present invention relates to a method and device for emulsifying emulsion explosive: an oil phase and a part of a water phase having undergone split-flow enter a first stage coarse emulsion mixer; after mixing, the mixture together with a part of the water phase having undergone second stage split-flow enters a second stage coarse emulsion mixer; the obtained mixture together with a part of the water phase having undergone third stage split-flow enters a third stage coarse emulsion mixer for mixing; forming a coarse emulsion matrix after multiple stages of mixing, and finally completing emulsification after mixing in a multi-stage fine emulsion mixer. The method and device mix the water phase with the oil phase multiple times according to a desired ratio, thus greatly reducing the stored explosive, with no mechanical stirring or shearing, with no heat accumulation, and with low pressure, without requiring matrix pumping, thus enhancing safety.

Claims

1. An emulsifying device for an emulsion explosive, comprising: (i) an oil phase storage tank equipped with an oil phase flow rate regulating pump, (ii) a water phase storage tank equipped with a total water phase flow rate regulating pump, (iii) a multi-stage coarse emulsion mixer including: (a) a first stage coarse emulsion mixer equipped with: an oil inlet disposed at an end of the multi-stage coarse emulsion mixer, the oil inlet being configured to allow an oil phase to enter at its full proportion into the first stage coarse emulsion mixer, a first stage adjustment of flow rate configured to control a first part of a water phase to flow into the first stage coarse emulsion mixer, a first diversion port configured to laterally introduce the first part of the water phase into the first stage coarse emulsion mixer, a first jet hole configured to cause the first part of the water phase to spout from the first jet hole at a certain flow velocity and to laterally strike the oil phase to mix with the oil phase to form a first-stage coarse emulsion, and a first orifice plate configured to allow the first-stage coarse emulsion to spout from the first orifice plate and into a second stage coarse emulsion mixer, (b) the second stage coarse emulsion mixer equipped with: a second stage adjustment of flow rate configured to control a second part of the water phase to flow into the second stage coarse emulsion mixer, a second diversion port configured to laterally introduce the second part of the water phase into the second stage coarse emulsion mixer, a second jet hole configured to cause the second part of the water phase to spout from the second jet hole at a certain flow velocity and to laterally strike the first-stage coarse emulsion to mix with the first-stage coarse emulsion to form a second-stage coarse emulsion, and a second orifice plate configured to allow the second-stage coarse emulsion to spout from the second orifice plate and into a third stage coarse emulsion mixer, (c) the third stage coarse emulsion mixer equipped with: a third stage adjustment of flow rate configured to control a third part of the water phase to flow into the third stage coarse emulsion mixer, a third diversion port configured to laterally introduce the third part of the water phase: into the third stage coarse emulsion mixer, a third jet hole configured to cause the third part of the water phase to spout from the third jet hole at a certain flow velocity and to laterally strike the second-stage coarse emulsion to mix, with the second-stage coarse emulsion to form a third-stage coarse emulsion, and a third orifice plate, (d) a fourth stage coarse emulsion mixer equipped with a fourth stage adjustment of flow rate, a fourth diversion port, a fourth jet hole, and a fourth orifice plate, and (e) a fifth stage coarse emulsion mixer equipped with a fifth stage adjustment of flow rate, a fifth diversion port, a fifth jet hole, and a fifth orifice plate, wherein: every two adjacent stages of coarse emulsion mixers are connected in series, and a longitudinal axis through the oil inlet is transverse to each longitudinal axis through at least the first diversion port, the second diversion port, and the third diversion port, and (iv) a fine emulsion mixer connected to the fifth stage coarse emulsion mixer.

2. The emulsifying device for an emulsion explosive of claim 1, wherein a sum of flow rates under the control of the first stage adjustment of flow rate, the second stage adjustment of flow rate, the third stage adjustment of flow rate, the fourth stage adjustment of flow rate, and the fifth stage adjustment of flow rate corresponds to a total flow rate under the control of the total water phase flow rate regulating pump, and the flow rates among all stages of flow rate adjustment are allocated proportionately.

3. The emulsifying device for an emulsion explosive of claim 1, wherein the fine emulsion mixer is a static mixer or a Venturi tube.

4. The emulsifying device for an emulsion explosive of claim 3, wherein the total flow rate of the oil phase regulated by the oil phase flow rate regulating pump and the total flow rate of the water phase regulated by the total water phase flow rate regulating pump are 4%-10% and 90%-96% in weight percentage, respectively.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic view of 5-stage coarse emulsion emulsifying technology of the present invention.

(2) FIG. 2A is a schematic view of a structure of a 5-stage coarse emulsion emulsifying device of the present invention.

(3) FIG. 2B is a cross-sectional view of a coarse emulsion mixer along cut line 2B-2B.

DETAILED DESCRIPTION OF EMBODIMENTS

(4) A 5-stage coarse emulsion emulsifying device shown in FIG. 1 is used to perform 5-stage coarse emulsion emulsification: the oil phase enters with full proportion from the initial end 1, the water phase with about of the normal proportions enters laterally from the diversion port 2, spouts from the jet hole 3 at a certain flow velocity, and strikes the oil phase, then the mixture spouts from the orifice plate 4 at a certain flow velocity, forming the first stage coarse emulsion; the spew is further collided and mixed with a second part of the water phase with about of the normal proportions that enters from the diversion port 5 and spouts from the jet hole 6 at a certain flow velocity, then the obtained mixture spouts from the orifice plate 7 at a certain flow velocity, forming the second stage coarse emulsion; the spew is further collided and mixed with a second part of the water phase with about of the normal proportions that enters from the diversion port 8 and spouts from the jet hole 9 at a certain flow velocity, then the obtained mixture spouts from the orifice plate 10 at a certain flow velocity, forming the third stage coarse emulsion; the spew is further collided and mixed with a second part of the water phase with about of the normal proportions that enters from the diversion port 11 and spouts from the jet hole 12 at a certain flow velocity, then the obtained mixture spouts from the orifice plate 13 at a certain flow velocity, forming the fourth stage coarse emulsion; the spew is further collided and mixed with a second part of the water phase with about of the normal proportions that enters from the diversion port 14 and spouts from the jet hole 15 at a certain flow velocity, then the obtained mixture spouts from the orifice plate 16 at a certain flow velocity, forming the fifth stage coarse emulsion. At last, the spew enters from the fine emulsion orifice plate 17 and spouts from the jet hole 18 at a certain flow velocity, in this way the emulsification process is completed.

(5) In order to provide a better understanding of the invention, through specific embodiments below the present invention will be illustrated in detail.

Embodiment 1

(6) A Venturi tube is adopted as the mixer, the stage number of coarse emulsion is 7, and the stage number of fine emulsion is 1. The total flow rates of the oil phase and the water phase that are mixed are 10% and 90% in weight percentage, respectively. During the phase of coarse emulsion, the water phase is divide into 7 equal parts and added into the mixer by seven times. The flow velocities of coarse emulsion and fine emulsion are 10 m/s and 20 m/s, respectively, the production capacity is 5 tons per hour. Experimental results: the viscosities of coarse emulsion and fine emulsion are 800 cp and 3300 cp, respectively, the systematic pressure is 1.5 Mpa. The viscosity of final colloid is equal to that of mechanical shearing at the linear velocity of 15 m/s.

Embodiment 2

(7) An SV type static mixer is adopted as the mixer, the stage number of coarse emulsion is 5, and the stage number of fine emulsion is 3. The total flow rates of the oil phase and the water phase that are mixed are 8% and 92% in weight percentage, respectively. During the phase of coarse emulsion, the water phase is divide into 5 equal parts and added into the coarse emulsion static apparatus by five times. The flow velocities of coarse emulsion and fine emulsion are 10 m/s and 20 m/s, respectively, the production capacity is 5 tons per hour. Experimental results: the viscosities of coarse emulsion and fine emulsion are 1000 cp and 2600 cp, respectively, the systematic pressure is 3.8 Mpa. The viscosity of final colloid is equal to that of mechanical shearing at the linear velocity of 12 m/s.

Embodiment 3

(8) An orifice plate is adopted as the mixer, the stage number of coarse emulsion is 3, and the stage number of fine emulsion is 5. The total flow rates of the oil phase and the water phase that are mixed are 4% and 96% in weight percentage, respectively. During the phase of coarse emulsion, the water phase is divide into 3 equal parts and added into the coarse emulsion static apparatus by three times. The flow velocities of coarse emulsion and fine emulsion are 15 m/s and 20 m/s, respectively, the production capacity is 5 tons per hour. Experimental results: the viscosities of coarse emulsion and fine emulsion are 1900 cp and 3300 cp, respectively, the systematic pressure is 1.2 Mpa. The viscosity of final colloid is equal to that of mechanical shearing at the linear velocity of 20 m/s.

(9) Obviously, the above embodiments are for purpose of clear illustration and are not intended to limit the embodiment mode. It will be obvious to those skilled in the art that changes and modifications may be made without departing from the invention in its broader aspects, and, therefore, the aim of the appended claims is to cover all such changes and modifications as fall within the true spirit and scope of the invention.