Emulsion explosive production preheating system

Abstract

The utility model discloses an emulsion explosive production preheating system, wherein the outlet of an ammonium nitrate storage tank is connected to an inlet pipeline of a first water phase pump, the outlet of the first water phase pump is connected to an inlet pipeline of a water phase transfer tank, the outlet of the water phase transfer tank is connected to an inlet pipeline of a second water phase pump, the outlet of the second water phase pump is connected to a tube-side inlet of a heat exchanger, and the tube-side outlet of the heat exchanger is connected to an inlet pipeline of a mixing tank; the outlet of a composite oil phase storage tank is connected to an inlet of an oil phase transfer tank through a first oil phase pump, the outlet of the oil phase transfer tank is connected to the tube-side inlet of the heat exchanger through a second oil phase pump, and the tube-side outlet of the heat exchanger is connected to an inlet pipeline of the mixing tank; a heat exchange coil is arranged inside the ammonium nitrate storage tank, the outlet of a water exchange tank is connected to an inlet pipeline of a first circulating water pump, the outlet of the first circulating water pump is connected to an inlet pipeline of the heat exchange coil, the outlet of the heat exchange coil is connected to an inlet pipeline of a preheating water tank, and the outlet of the preheating water tank is connected to an inlet pipeline of the first water phase pump.

Description

Technical Field

[0001] The utility model relates to the technical field of emulsion explosives, in particular to a production preheating system for emulsion explosives. Background Art

[0002] The production process of emulsion explosives is to use tank trucks to transport the purchased liquid ammonium nitrate to the factory, and then use a delivery pump to transport it to the ammonium nitrate storage tank. Water is added to the ammonium nitrate storage tank to make a certain concentration to prepare the required water phase. The water phase and oil phase are weighed separately and sent to a mixing tank. After stirring and blending in the mixing tank, they are filtered and measured by a flow meter. After that, they are pumped into a continuous emulsifier in proportion through a pressure-resistant hose and then transported to a mixing truck by a pump, loaded and shipped out.

[0003] The temperature in the north is high in winter. In order to reduce crystallization during transportation, the temperature of liquid ammonium nitrate is kept at 120 degrees Celsius. However, in order to reduce the impact on the density of later products, the liquid ammonium nitrate in the aqueous phase needs to be cooled to 80 degrees Celsius before the oil phase and the aqueous phase are emulsified. The current treatment method is to cool the liquid ammonium nitrate by natural cooling, but the efficiency is low and the heat cannot be fully utilized, wasting heat energy. Utility Model Content

[0004] The utility model aims to provide a preheating system for the production of emulsion explosives.

[0005] The utility model is implemented by the following technical scheme: an emulsion explosive production preheating system, which includes an ammonium nitrate storage tank, a water phase transfer tank, a heat exchanger, a mixing tank, a composite oil phase storage tank, and an oil phase transfer tank;

[0006] The outlet of the ammonium nitrate storage tank is connected to the inlet pipeline of the first water phase pump, the outlet of the first water phase pump is connected to the inlet pipeline of the water phase transfer tank, the outlet of the water phase transfer tank is connected to the inlet pipeline of the second water phase pump, the outlet of the second water phase pump is connected to the tube side inlet of the heat exchanger, and the tube side outlet of the heat exchanger is connected to the inlet pipeline of the mixing tank;

[0007] The outlet of the composite oil phase storage tank is connected to the inlet of the oil phase transfer tank through a first oil phase pump, the outlet of the oil phase transfer tank is connected to the tube side inlet of the heat exchanger through a second oil phase pump, and the tube side outlet of the heat exchanger is connected to the inlet pipeline of the mixing tank;

[0008] A first delivery pipe is connected between the outlet of the first water phase pump and the inlet of the ammonium nitrate storage tank;

[0009] A second delivery pipe is connected between the inlet of the water phase transfer tank and the outlet of the water phase transfer tank;

[0010] A third delivery pipe is connected between the shell side outlet of the heat exchanger and the inlet of the ammonium nitrate storage tank;

[0011] A fourth delivery pipe is connected between the tube side outlet of the heat exchanger and the oil phase transfer tank;

[0012] It also includes a water exchange tank, a preheated water tank, and a heat exchange coil. The ammonium nitrate storage tank is provided with a heat exchange coil inside. The outlet of the water exchange tank is connected to the inlet pipeline of the first circulating water pump, the outlet of the first circulating water pump is connected to the inlet pipeline of the heat exchange coil, the outlet of the heat exchange coil is connected to the inlet pipeline of the preheated water tank, and the outlet of the preheated water tank is connected to the inlet pipeline of the first water phase pump.

[0013] Furthermore, the inlet of the water exchange tank is connected to a water inlet pipe.

[0014] Furthermore, the outlet of the heat exchange coil is connected to the inlet of the air cooling tower through a fifth delivery pipe, and the outlet of the air cooling tower is connected to the water inlet pipe of the water exchange water tank.

[0015] Furthermore, a water phase discharge pipe is connected to the pipeline between the outlet of the ammonium nitrate storage tank and the inlet of the first water phase pump.

[0016] The utility model has the advantages that, under the action of the second delivery pipe, the third delivery pipe and the fourth delivery pipe, the water phase in the ammonium nitrate storage tank is delivered to the heat exchanger through the second delivery pipe, and then delivered to the ammonium nitrate storage tank through the heat exchanger and the third delivery pipe, and the oil phase in the composite oil phase storage tank is delivered to the heat exchanger through the oil phase transfer tank, and then delivered to the oil phase transfer tank through the heat exchanger and the fourth delivery pipe, the function is to fully preheat the oil phase in the oil phase transfer tank with the water phase, and after multiple cycles, the oil phase is heated to the process temperature requirement;

[0017] The normal mixing process of the water phase and the oil phase is that the ammonium nitrate in the water phase is discharged from the ammonium nitrate storage tank to the water phase transfer tank, and then sent to the heat exchanger. The oil phase pumped from the oil phase transfer tank is subjected to secondary heat exchange in the heat exchanger. The water phase and the oil phase that meet the process requirements after heat exchange are sent to the mixing tank, mixed evenly in the mixing tank and loaded onto the truck. The use of the heat exchanger reduces the problem of water phase crystallization caused by direct contact between the high-temperature water phase and the low-temperature oil phase in the mixing tank, and at the same time fully utilizes the heat of the liquid ammonium nitrate, and the cooling efficiency is high, which speeds up the work efficiency.

[0018] The liquid ammonium nitrate in the ammonium nitrate storage tank is heat exchanged using a water exchange tank and a heat exchange coil, and the hot water after heat exchange is stored in a preheating water tank. Before the system is used, the hot water in the preheating water tank is used to flush the pipeline, which reduces the cooling and crystallization of the liquid ammonium nitrate in the pipeline and solves the problem of pipeline blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] In the figure: ammonium nitrate storage tank 1, first water phase pump 2, water phase transfer tank 3, second water phase pump 4, heat exchanger 5, mixing tank 6, composite oil phase storage tank 7, first oil phase pump 8, oil phase transfer tank 9, second oil phase pump 10, first delivery pipe 11, second delivery pipe 12, third delivery pipe 13, fourth delivery pipe 14, hot water exchange tank 15, preheated water tank 16, heat exchange coil 17, first circulating water pump 18, water inlet pipe 19, fifth delivery pipe 20, air cooling tower 21, water phase discharge pipe 22. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1 As shown, the emulsion explosive production preheating system includes an ammonium nitrate storage tank 1, a water phase transfer tank 3, a heat exchanger 5, a mixing tank 6, a composite oil phase storage tank 7, and an oil phase transfer tank 9;

[0024] The outlet of the ammonium nitrate storage tank 1 is connected to the inlet pipeline of the first water phase pump 2, the outlet of the first water phase pump 2 is connected to the inlet pipeline of the water phase transfer tank 3, the outlet of the water phase transfer tank 3 is connected to the inlet pipeline of the second water phase pump 4, the outlet of the second water phase pump 4 is connected to the tube side inlet of the heat exchanger 5, and the tube side outlet of the heat exchanger 5 is connected to the inlet pipeline of the mixing tank 6;

[0025] The outlet of the composite oil phase storage tank 7 is connected to the inlet of the oil phase transfer tank 9 through the first oil phase pump 8, the outlet of the oil phase transfer tank 9 is connected to the pipe side inlet of the heat exchanger 5 through the second oil phase pump 10, and the pipe side outlet of the heat exchanger 5 is connected to the inlet pipeline of the mixing tank 6;

[0026] The normal mixing process of the water phase and the oil phase is that the ammonium nitrate in the water phase is discharged from the ammonium nitrate storage tank 1 into the water phase transfer tank 3, and then sent to the heat exchanger 5, in which the oil phase pumped from the oil phase transfer tank 9 is subjected to secondary heat exchange, and the water phase and the oil phase that meet the process requirements after heat exchange are sent to the mixing tank 6, mixed evenly in the mixing tank 6 and loaded onto the truck. The use of the heat exchanger 5 reduces the problem of water phase crystallization caused by direct contact between the high-temperature water phase and the low-temperature oil phase in the mixing tank 6.

[0027] A first delivery pipe 11 is connected between the outlet of the first water phase pump 2 and the inlet of the ammonium nitrate storage tank 1;

[0028] A second delivery pipe 12 is connected between the inlet of the water phase transfer tank 3 and the outlet of the water phase transfer tank 3;

[0029] A third delivery pipe 13 is connected between the shell side outlet of the heat exchanger 5 and the inlet of the ammonium nitrate storage tank 1;

[0030] A fourth delivery pipe 14 is connected between the tube side outlet of the heat exchanger 5 and the oil phase transfer tank 9;

[0031] Switching valves are provided on the first delivery pipe 11 , the second delivery pipe 12 , the third delivery pipe 13 , and the fourth delivery pipe 14 to meet the requirements of the process.

[0032] Under the action of the second delivery pipe 12, the third delivery pipe 13 and the fourth delivery pipe 14, the water phase in the ammonium nitrate storage tank 1 is delivered to the heat exchanger 5 through the second delivery pipe 12, and then delivered to the ammonium nitrate storage tank 1 through the heat exchanger 5 and the third delivery pipe 13. The oil phase in the composite oil phase storage tank 7 is delivered to the heat exchanger 5 through the oil phase transfer tank 9, and then delivered to the oil phase transfer tank 9 through the heat exchanger 5 and the fourth delivery pipe 14. The purpose is to fully preheat the oil phase in the oil phase transfer tank 9 with the water phase. After multiple cycles, the oil phase is heated to the process temperature requirement, and a corresponding thermometer is set on the oil phase transfer tank 9.

[0033] It also includes a water exchange tank 15, a preheated water tank 16, and a heat exchange coil 17. The heat exchange coil 17 is provided inside the ammonium nitrate storage tank 1. The outlet of the water exchange tank 15 is connected to the inlet pipeline of the first circulating water pump 18, the outlet of the first circulating water pump 18 is connected to the inlet pipeline of the heat exchange coil 17, the outlet of the heat exchange coil 17 is connected to the inlet pipeline of the preheated water tank 16, and the outlet of the preheated water tank 16 is connected to the inlet pipeline of the first water phase pump 2;

[0034] The liquid ammonium nitrate in the ammonium nitrate storage tank 1 is heat exchanged by using a heat exchange water tank 15 and a heat exchange coil 17, and the hot water after heat exchange is stored in a preheating water tank 16. Before the system is used, the hot water in the preheating water tank 16 is used to flush the pipeline, thereby reducing the cooling and crystallization of the liquid ammonium nitrate in the pipeline and solving the problem of pipeline blockage. Specifically, the hot water enters the heat exchanger 5 through the second delivery pipe 12, and then is discharged from the heat exchanger 5 to the ammonium nitrate storage tank 1 through the third delivery pipe 13. This part of the hot water can dilute the transported liquid ammonium nitrate to the required concentration, and a flow meter is arranged on the third delivery pipe 13.

[0035] The inlet of the hot water exchange tank 15 is connected to a water inlet pipe 19 .

[0036] The outlet of the heat exchange coil 17 is connected to the inlet of the air cooling tower 21 through the fifth delivery pipe 20, and the outlet of the air cooling tower 21 is connected to the water inlet pipe 19 of the water exchange tank 15. A switching valve is provided on the fifth delivery pipe 20. In summer, the hot water after heat exchange is delivered to the air cooling tower 21 through the fifth delivery pipe 20, and the cold water treated by the air cooling tower 21 is delivered to the water exchange tank 15 for reuse.

[0037] A water phase discharge pipe 22 is connected to the pipeline between the outlet of the ammonium nitrate storage tank 1 and the inlet of the first water phase pump 2. A switching valve is provided on the water phase discharge pipe 22. The liquid ammonium nitrate on the unloading truck is pumped to the outlet of the ammonium nitrate storage tank 1 by the water phase discharge pipe 22, and is delivered to the ammonium nitrate storage tank 1 by the first water phase pump 2 and the first delivery pipe 11.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Emulsion explosive production preheating system, characterized in that: It includes an ammonium nitrate storage tank, a water phase transfer tank, a heat exchanger, a mixing tank, a composite oil phase storage tank, and an oil phase transfer tank; The outlet of the ammonium nitrate storage tank is connected to the inlet pipeline of the first water phase pump, the outlet of the first water phase pump is connected to the inlet pipeline of the water phase transfer tank, the outlet of the water phase transfer tank is connected to the inlet pipeline of the second water phase pump, the outlet of the second water phase pump is connected to the tube side inlet of the heat exchanger, and the tube side outlet of the heat exchanger is connected to the inlet pipeline of the mixing tank; The outlet of the composite oil phase storage tank is connected to the inlet of the oil phase transfer tank through a first oil phase pump, the outlet of the oil phase transfer tank is connected to the tube side inlet of the heat exchanger through a second oil phase pump, and the tube side outlet of the heat exchanger is connected to the inlet pipeline of the mixing tank; A first delivery pipe is connected between the outlet of the first water phase pump and the inlet of the ammonium nitrate storage tank; A second delivery pipe is connected between the inlet of the water phase transfer tank and the outlet of the water phase transfer tank; A third delivery pipe is connected between the shell side outlet of the heat exchanger and the inlet of the ammonium nitrate storage tank; A fourth delivery pipe is connected between the tube side outlet of the heat exchanger and the oil phase transfer tank; It also includes a water exchange tank, a preheated water tank, and a heat exchange coil. The ammonium nitrate storage tank is provided with a heat exchange coil inside. The outlet of the water exchange tank is connected to the inlet pipeline of the first circulating water pump, the outlet of the first circulating water pump is connected to the inlet pipeline of the heat exchange coil, the outlet of the heat exchange coil is connected to the inlet pipeline of the preheated water tank, and the outlet of the preheated water tank is connected to the inlet pipeline of the first water phase pump.

2. The emulsion explosive production preheating system according to claim 1, characterized in that: The inlet of the hot water exchange tank is connected with a water inlet pipe.

3. The emulsion explosive production preheating system according to claim 2, characterized in that: The outlet of the heat exchange coil is connected to the inlet of the air cooling tower through the fifth delivery pipe, and the outlet of the air cooling tower is connected to the water inlet pipe of the water exchange water tank.

4. The emulsion explosive production preheating system according to claim 3, characterized in that: A water phase discharge pipe is connected to the pipeline between the outlet of the ammonium nitrate storage tank and the inlet of the first water phase pump.

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