JP2014105154A - Nozzle type salt generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop an energy saving salt generator in which salt is generated without using heat energy such as a high temperature steam and a metal heated by a heater.SOLUTION: In a nozzle type salt generator, a low pressure fluid such as sea water in which a solid content such as a salt is dissolved is decomposed to 1-50 μm of a fine particle diameter by a high speed revolution air current generated by a high pressure gas that is supplied to a two-fluid nozzle that is formed by a metal or a resin, a property that the atomized fluid is effectively vaporized is utilized, and the solid content such as a salt that is dissolved in the inside is solidified without using energy by heat or the like.

Description

  In the present invention, the low-pressure liquid 5 is decomposed to a particle size of 1 to 50 μm by the high-pressure gas 3 supplied to the two-fluid nozzle 1, the finely divided liquid 21 is efficiently volatilized, and the solid content 22 dissolved inside. It is related with solidifying without using energy by heat.

  It is said that there is no rock salt in Japan, and salt production methods using seawater as a raw material were common. As the production method, the Shioda production method has been performed for a long time, but in recent years it has been mass-produced by the ion exchange membrane method.

  However, in the production method using seawater, the salt concentration of seawater is only about 3%, and because Japan is wet and humid, seawater needs to be boiled without being crystallized in the sun salt production method. Consume heat energy. Unlike areas with large land, low rainfall and low humidity, Japan must evaporate nearly 1 liter of water to produce 30 grams of salt. For this reason, salt production has been carried out by concentrating and boiling the seawater instead of boiling it as it is.

  Various technological innovations have also been made in the method for producing salt from seawater, using steam (Patent Documents 1 and 2), using a reverse permeable membrane (Patent Document 3), and utilizing precipitation. (Patent Document 4).

JP 2002-68738 A JP 2002-167217 A JP 2003-212537 A JP 54-1112796 A

Problems to be solved by the invention

  However, the above patent consumes a large amount of fuel because it uses a large amount of heat energy as a means to evaporate a large amount of water, and consumes a large amount of electrical energy, such as operating a vacuum pump at all times to evaporate in a vacuum environment. The detrimental effects such as the decomposition of vitamins other than salt by the heat energy are great.

  This invention implement | achieves the energy-saving salt production | generation apparatus which can produce | generate only with the high pressure gas by a 2 fluid nozzle, without using the heat energy and electric energy which are consumed excessively.

Means for solving the problem

  In the present invention, a low-pressure liquid such as seawater or salt water in which a solid content such as salt is dissolved by a high-speed rotating air flow generated by a high-pressure gas supplied to a two-fluid nozzle formed of metal or resin is 1 to 50 μm. The solid content such as salt dissolved in the inside is solidified without using heat or the like by utilizing the property that the liquid that has been decomposed to a fine particle size is volatilized efficiently.

  In addition, in order to efficiently vaporize, the space is exhausted for the purpose of reducing the humidity of the space such as a room for collecting solids, and the liquid that does not evaporate but proceeds to the exhaust device as droplets is returned to the liquid tank again. Therefore, it has a technology that can concentrate the liquid.

  In order to vaporize more efficiently, the air introduced into the space is dry air or a gas containing no moisture such as nitrogen or having a low moisture concentration.

  Vaporized water is water from which dissolved solids have been removed and does not contain impurities. Water that has been returned to liquid water by a condenser is used for beverages after sterilization and other treatments. Have technology to do.

Effect of the invention

  According to the nozzle type salt production apparatus using the two-fluid nozzle 1 of the present invention, the high-speed gas stream generated by the high-pressure gas 3 rotating at high speed from the nozzle outlet 29 of the two-fluid nozzle 1 is efficiently used. Seawater, salt water or liquid 5 is decomposed and atomized. At this time, when the flow rate of seawater, salt water, or liquid 5 is controlled at a flow rate about 1/1000 of the high-pressure gas flow rate, it is decomposed and atomized into droplets having a particle diameter of 1 to 50 μm as shown in FIG. For example, if the particle size when spraying 1 ml of liquid is 10 μm, the surface area increases by approximately 2 × 10 6 times.

  Thus, the atomized seawater, salt water or liquid 5 created by the effect of the two-fluid nozzle is very easy to evaporate due to the increased surface area, and it is not necessary to evaporate water by heater, steam heat, solar heat, etc. Can make salt efficiently. The high-pressure gas 3 used for the two-fluid nozzle 1 may be dry nitrogen or other liquid nitrogen vaporized with a vaporizer. In this case, since the vaporizer used for vaporization uses a heat exchange type, there is an advantage that it is not necessary to use energy such as electric power.

  Moreover, according to the nozzle type salt production apparatus using the two-fluid nozzle 1 of the present invention, since no heat is applied in the process, various minerals and vitamins dissolved or mixed in seawater, salt water or liquid 5 are contained. Nutrients are not decomposed by heat. In addition, pipes that send seawater, salt water, liquid 5 or high-pressure gas 3 are made of metal such as stainless steel that does not corrode due to salt, etc., or resin materials such as fluororesin or vinyl chloride, so they can be obtained even for long periods of use. It is extremely small that impurities are mixed into the solid 22 such as salt.

  According to the nozzle type salt production apparatus using the two-fluid nozzle 1 of the present invention, there are no movable parts in the space 17 for collecting the solid content 22 such as salt. Simply spray from the nozzle. Therefore, there is an advantage that it can be operated continuously without the need for periodic inspection of the movable part.

1 is an overall view for carrying out the present invention. It is a figure of a spraying part. It is a figure of a gas generation part. It is a figure of a liquid supply part. It is a figure of a solid collection part. It is a conceptual diagram of a 2 fluid nozzle. It is a particle size distribution map of a droplet. It is a figure when using a some nozzle.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an overall view of the apparatus. A spray unit 11 including a two-fluid nozzle 1, a gas generation unit 12, a liquid supply unit 16, and a solid collection unit 17 that is a space in which ultrafine particles sprayed by the nozzle vaporize and collect a solid salt. This is a nozzle type salt production apparatus.

  FIG. 2 is a diagram of the spray unit 11. Stainless steel, which is a stable metal free from rust due to salt, etc., a hard peak free from corrosion due to salt, etc., a two-fluid nozzle 1 formed of a fluororesin, and a pressure regulator 7 to the two-fluid nozzle 1 at a pressure of 300 to 500 KPa And a pipe 2 made of a resin such as fluororesin or vinyl chloride, or a metal such as stainless steel, which sends a high-pressure gas 3 such as high-pressure air or high-pressure nitrogen whose flow rate is adjusted to 10 to 30 liters per minute by the flow meter 6. It is connected and supplied to the gas inlet 28 of the two-fluid nozzle 1.

  In addition, the flow rate of 9 to 20 ml per minute is applied to the pipe 4 formed of stainless steel, which is a stable metal free from salt rust, etc., and a peak that is hard and free from corrosion due to salinity, or fluororesin. A pipe 4 for feeding the adjusted liquid 5 is connected to the liquid inlet 27 of the two-fluid nozzle 1.

  The high-pressure gas pipe 2 is provided with a filter 8 for removing dust, and removes moisture, oil, dust and the like that may be contained in the high-pressure gas.

  In order to remove impurities, dust, and the like contained in a solid-dissolved liquid such as seawater, salt water, or liquid, a filter 10 is attached to the liquid feeding pipe 4 to remove the dust contained in the seawater. . If heavy metal is a concern, the filter may be changed to a function for removing heavy metal, or both may be used at the same time.

  FIG. 3 shows the gas generator 12. The generation of the high-pressure gas 3 includes a compressor type 12-2 having a tank with a large capacity and 12-1 for vaporizing and supplying liquid nitrogen by a vaporizer. The compressed air generated by the compressor type 12-2 contains a lot of moisture in many cases, and therefore it is necessary to pass through the moisture removal filter 30 before or simultaneously with the filter 8. In the case of 12-1 in which liquid nitrogen is gasified by a vaporizer, it does not need to pass through a moisture removal filter because it originally does not contain moisture.

  FIG. 4 shows the liquid supply unit 16. The supply of the liquid 5 is performed by the storage tank 13. When the storage tank 13 is located at a position higher than the outlet height of the two-fluid nozzle 1 or when the pressure loss of the filter 10 is small, the storage tank 13 is sucked by the pulling pressure by the two-fluid nozzle 1, and therefore actively feeds liquid by pressurization or the like. Since it is not necessary, the storage tank 13 does not have to be a pressure vessel.

  When the pressure loss of the filter 10 is higher than the suction pressure, it is performed by a liquid feed pump type 16-2 using a pump 14 having a flow rate adjusting function. In this system, it is possible to use a pump having a flow rate adjusting function. In this case, since the total liquid amount can be managed, there is an advantage that the salt production amount can be managed. Further, since the tank 13 is not pressurized, it does not have to be a pressure vessel.

  As another method in the case where the pressure loss of the filter 10 exceeds the pulling pressure, the pressure can be applied to the storage tank 13 by a liquid pressure feeding type 16-1 for feeding the liquid 5. In this system, low-pressure air or low-pressure nitrogen used for pumping is supplied into the tank 13 by supplying a gas at a constant pressure by the regulator 15 so that the liquid is supplied by pushing out the liquid in the tank 13. In this case, the storage tank 13 needs to have a pressure resistance equivalent to that of the pressure vessel and also needs a safety device such as a pressure relief valve. A separate flow meter is installed to manage the liquid flow rate.

  FIG. 5 shows the solid collection unit 17. The droplets 21 of seawater, salt water, or liquid 5 ultrafine particles sprayed by the two-fluid nozzle 1 are sufficiently vaporized to disperse solid content 22 such as dissolved salt. Since the ultrafine particle droplet 21 exiting from the outlet 29 of the two-fluid nozzle 1 reaches a distance of about 10 m at the longest, the space 17 for collecting the solid content 22 is preferably about 10 m from the nozzle outlet 29. In addition, since the humidity in the collection space 17 increases due to the vaporization of water, an exhaust pipe 19 that discharges the total flow rate of the gas discharged from the nozzle 1 and the amount that expands when the water vaporizes is installed. To do.

  The ultrafine droplets 21 are vaporized in the collection space 17 and the solid content 22 is stacked on the collection unit 20. Since there are no movable parts in the collection space 17, there is no need to perform maintenance, and contamination with foreign matter can be extremely reduced. In addition, it is a low-cost and energy-saving device that can be operated continuously for 24 hours without a person.

  The humidity in the collection space 17 increases due to the vaporization of the ultrafine droplets 21. In order to maintain the vaporization performance, it is necessary to keep the humidity in the collection space 17 low. Therefore, an exhaust pipe 19 that exhausts the moist air in the collection space 17 to the outside is installed, and functions to suppress an increase in humidity in the space 17. Since there is a large amount of vaporized liquid in the exhaust, the liquid vaporized by the condenser 18 is reliquefied. This liquid is water without impurities.

  FIG. 6 is a conceptual diagram of the two-fluid nozzle 1. The two-fluid nozzle 1 includes two inlets, a liquid inlet 27 and a gas inlet 28, and a nozzle outlet 29 that protrudes 0 to 1 mm. Liquid such as seawater and salt water entering from the liquid inlet 27 passes through the center of the two-fluid nozzle 1 and reaches the nozzle outlet 29. Since the inner diameter of the pipe from the liquid inlet 27 to the nozzle outlet 29 is as thick as 1 mm or more, even a liquid in which a solid content is dissolved or mixed can be flowed without clogging.

  Since the high-pressure gas of 300 to 500 KPa flowing in from the gas inlet 28 is completely separated from the liquid inside the two-fluid nozzle 1, it reaches the nozzle outlet 29 via the internal slit without mixing. The high-pressure gas is rectified into a high-speed rotational flow by the internal slit, and is discharged from the nozzle outlet 29 in the high-speed rotational flow and meets the liquid.

  The high-speed gas of high-speed rotating flow decomposes and sprays the liquid finely while maintaining its energy. The gas of the high-speed rotating flow that exits from the nozzle outlet 29 is discharged at an initial speed of 50 to 200 m per second depending on the pressure and flow rate, loses its energy due to the decomposition of the liquid and the friction with the atmosphere, and the speed is significantly reduced. FIG. 7 is a particle size distribution diagram of droplet sizes according to the flow rate of the gas supplied to the two-fluid nozzle 1 and the flow rate of the liquid. In this figure, the flow rate of liquid, the flow rate of gas, and the distance from the nozzle which measured the particle size are drawn. According to this figure, it can be seen that when the liquid flow rate is low and the gas flow rate is high, the particle size of the liquid droplet is small, and the further away from the nozzle nozzle outlet 29, the smaller the particle size of the liquid droplet.

  When the gas flow rate is large, the gas velocity of the high-speed rotary flow from the nozzle outlet 29 is large and the mass is large, so that the energy for decomposing the liquid increases proportionally. Further, as the finer droplets progress while evaporating as they move away from the nozzle and the outlet 29, the particle diameter becomes smaller.

  FIG. 8 is a conceptual diagram when a plurality of nozzle systems are used. It increases in proportion by increasing the quantity of the spray part 11 according to the production amount of salt. The droplets discharged from the nozzles can be sprayed in the same collection space 17, and the amount discharged from the exhaust pipe 19 should be increased in proportion to the flow rate. I will provide a.

DESCRIPTION OF SYMBOLS 1 2 Fluid nozzle 2 High pressure gas piping 3 High pressure gas 4 Liquid piping 5 Liquid 6 Gas flowmeter 7 Gas pressure regulator 8 Gas filter 9 Liquid flow meter 10 Liquid filter 11 Spraying part 12 High pressure gas supply apparatus 12-1 High pressure gas supply device 12-2 by liquid nitrogen High pressure gas supply device 13 by compressor 13 Liquid storage tank 14 Liquid feed pump 15 Pressure regulator 16 for liquid pressure supply Liquid supply unit 16-1 Liquid supply unit 16-1 by liquid pressure type 2 Liquid supply unit 17 by liquid feed pump type Collection chamber 18 Condenser 19 Exhaust pipe 20 Collection unit 21 Atomized liquid 22 Solid 23 Compressor 24 Tank for compressed air 25 Liquid nitrogen 26 Vaporizer 27 Liquid inlet 28 Gas introduction Mouth 29 Nozzle outlet 30 Moisture removal filter

Claims (5)

A two-fluid nozzle 1 made of metal or resin, a resin or metal pipe 2 for sending a high-pressure gas such as high-pressure air or high-pressure nitrogen to the two-fluid nozzle 1, and a high-pressure gas 3 passing through the inside A resin-made or non-corrosive metal pipe 4 for sending seawater, saltwater or liquid in which solid matter such as salt is dissolved in the two-fluid nozzle 1, low-pressure seawater, saltwater or liquid 5 passing through the interior, high-pressure air or A high-pressure gas connected to a pipe 2 that sends a high-pressure gas such as high-pressure nitrogen and that measures the flow rate of the high-pressure gas and a pipe 2 that sends a high-pressure gas such as high-pressure air or high-pressure nitrogen A pressure regulator 7 that keeps the pressure of the gas constant, and a filter 8 that is connected to a pipe 2 that sends a high-pressure gas such as high-pressure air or high-pressure nitrogen and removes dust, moisture, oil, etc. contained in the high-pressure gas, , Solids such as salt dissolve Connected to the piping 3 for sending the sea water, salt water or liquid to be measured and measuring the flow rate of the liquid, and to the piping 3 for sending the sea water, salt water or liquid in which solid matter such as salt is dissolved, A spraying part 11 comprising a filter 10 for removing dust or impurities contained in salt water or liquid;
A gas generator 12 for generating a high-pressure gas such as high-pressure air or high-pressure nitrogen;
Tank 13 for storing sea water, salt water or liquid in which solids such as salt are dissolved, and tank 14 for feeding sea water, salt water or liquid in tank 13 or low pressure air or low pressure nitrogen used for pressure feeding A liquid supply section 16 comprising a pressure regulator 15 for supplying a constant pressure into the interior 13; a space 17 for collecting solids such as dissolved salt from the liquid sprayed and vaporized by the two-fluid nozzle 1; and a two-fluid nozzle The solid content such as salt dissolved in the liquid comprising the condenser 18 for re-liquefying the liquid sprayed and vaporized by the gas 1 and the exhaust pipe 19 for exhausting the gas in the space 17 is obtained. In the collection device, the high-pressure gas 3 supplied to the two-fluid nozzle 1 decomposes the low-pressure liquid 5 into a particle size of 1 to 50 μm, efficiently volatilizes the refined liquid 21, and the solid content dissolved inside Heat 22 Nozzle type salt formation apparatus characterized by solidifying a salt without the use of energy by.   The two-fluid nozzle 1 is a nozzle-type salt generation characterized in that the high-pressure gas 3 rotates at a high speed at a nozzle outlet 29 where the tip of the nozzle protrudes from 0 to 1 mm, and the low-pressure liquid 5 is finely decomposed by the swirling flow. apparatus.   By using a plurality of spraying units 11, it is possible to generate a solid content dissolved in the liquid multiple times as many as the number of spraying units 11.   The high-pressure gas 3 may be high-pressure air compressed by a compressor 23 and stored in a tank 24, or liquid nitrogen 25 gasified by a vaporizer 26, and a nozzle type salt generator.   The nozzle-type salt generating device, wherein the filter 8 for filtering the low-pressure liquid 5 may be a filter for removing not only dust but also unnecessary heavy metals.

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