JP2740147B2 - Method and apparatus for spraying treatment liquid and nozzle for spraying treatment liquid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for spraying a processing liquid, mainly for spraying a processing liquid on rice or the like to perform various liquid processings such as seasoning and fatigue prevention.

[0002]

2. Description of the Related Art Conventionally, a spray nozzle has been used for spraying such a processing liquid. “General Catalog 28” issued by Spraying System Japan
J "discloses various spray nozzles.

[0003] Spraying of the treatment liquid is usually performed on cooked rice conveyed on a conveyor in the rice cooking process. For this reason,
It is required that the processing liquid has a spraying area that only traverses the conveyor in the width direction and that an unsprayed portion is not formed. In addition, it is desired that the distribution of the amount of the processing liquid sprayed in the cross direction of the conveyor be uniform in order to make the processing uniform. Some of the spray nozzles utilizing air described in the catalog satisfy this, and are actually used.

[0004]

However, the satisfaction of the above-mentioned conditions is not only because the selection of the spray nozzle according to the application, but also the adjustment of the pressure of the processing liquid and the air becomes delicate and specialized.
It is difficult to respond to changes in the viscosity and temperature of the processing solution on site.

Further, a large amount of the processing liquid adheres to an exhaust duct of a work place where such a liquid processing is performed, and frequent cleaning is required, which is troublesome. In addition, the processing liquid adhering to the exhaust duct and the like is wasted. According to the experiments by the present inventors, the processing liquid is atomized by the conventional spray nozzle, and is sucked and discharged together with the exhaust gas by the exhaust means. If the treatment liquid is combined vinegar, it contains vinegar and salt in addition to steam, which also causes a problem of early corrosion of the duct.

If the atomization state of the processing liquid using the conventional spray nozzle is reduced to prevent these problems, the spread angle of the processing liquid becomes smaller, and the number of nozzles required for the width of the conveyor increases accordingly. However, it is necessary to select a nozzle having a different design depending on the difference in the viscosity of the processing liquid, and it is necessary to prepare various kinds of nozzles.

An object of the present invention is to solve the above-mentioned problems, and can cope with a high viscosity to a low viscosity.
It is an object of the present invention to provide a method and an apparatus for spraying a processing liquid capable of spraying a processing liquid almost uniformly without excessive supply or atomization with a sufficient divergence angle.

[0008]

According to a first aspect of the present invention, there is provided a method for spraying a processing liquid, wherein a processing liquid which flows down naturally from a nozzle hole or flows down at a low pressure close to the nozzle hole is sprayed from obliquely above both sides of the processing liquid. It is characterized by spraying the processing liquid to the processing object and performing liquid processing while diffusing it toward the processing object side with the collided air. The processing liquid to be flowed down at, the flow rate is small, the higher the viscosity, the more likely it is to drop,
The higher the flow rate and the lower the viscosity, the more likely it is to have a continuous laminar flow state. In any case, the nozzle hole or the nozzle having the nozzle hole does not function to subdivide the processing liquid flowing down.
The processing liquid that has flowed out of the nozzle hole at a predetermined flow rate is blown obliquely from above on both sides of the nozzle and collided with the processing liquid, and is blown off by air that diffuses in a predetermined range corresponding to the pressure toward the workpiece to be processed. Is spread almost evenly over the range. Therefore, the processing liquid can be diffused in a predetermined range determined by the air supply conditions, regardless of the required flow rate set, and can be sprayed almost evenly on the object to be processed. The particles of the processing liquid diffused by air are much larger than in the conventional case where they are atomized by the spray nozzle, so they are not sucked and discharged by exhaust, so there is no waste of processing liquid. The processing target can be liquid-processed with the supply amount according to the flow rate as described above, without excess or shortage. Further, it is possible to prevent the treatment liquid from adhering to the exhaust system and causing early contamination and corrosion.

According to a second aspect of the present invention, there is provided an apparatus for spraying a processing liquid, wherein the processing liquid flows down from the nozzle hole at a low pressure close to or spontaneously flowing, and both sides of the processing liquid flowing down near the nozzle hole. A processing liquid spray nozzle having an air passage for blowing air from diagonally above to collide with the processing liquid; a processing liquid supply means for supplying the processing liquid at a predetermined flow rate to the processing liquid outflow path; And an aseptic processing means for sterilizing the supplied air, wherein the processing liquid spray nozzle is supplied at a predetermined flow rate by the processing liquid supply means. While the processing liquid is allowed to flow naturally or at a low pressure close thereto, air of a predetermined pressure supplied by the air supply means is blown out from above both sides of the flowing processing liquid to collide with both. The processing liquid is diffused to a predetermined area corresponding to the set pressure by the fitting, and the flowing-down processing liquid is almost uniformly diffused to the predetermined area. Therefore, the processing liquid spray nozzle is installed facing the workpiece. By itself, the method of claim 1 can be automatically achieved, and the air supplied by the aseptic processing means is sterilized, so that germs adhere to the supplied air when performing liquid processing of food such as cooked rice. Breeding can be prevented.

According to a third aspect of the present invention, in the second aspect of the present invention, the processing liquid supply means is a flow rate pump, so that the flow rate can be set accurately and the processing liquid can be supplied more or less.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the flow rate pump is a diaphragm pump, and any high-viscosity processing solution can be set according to the stroke and the number of operations of the diaphragm. Since the processing liquid can be fed accurately, the supply of the processing liquid can be accurately achieved without any excess or shortage even if the viscosity is different.

The processing liquid spray nozzle according to the fifth aspect of the present invention has a nozzle hole at the center for allowing the processing liquid to flow naturally or at a low pressure close to the nozzle hole. It has a blowout port for blowing the air obliquely toward the airbag, and is suitable for application to the first aspect of the present invention.

According to a sixth aspect of the present invention, in addition to the fifth aspect of the present invention, each of the outlets is provided with an elliptical dish-shaped counterbore having a long diameter in a direction in which the blown air collides and diffuses. The air blown out from the outlets spreads along the elliptical dish-shaped counterbore provided at the outlets so as to have a large angle in the major axis direction, and the air blown out from each outlet further flows into the nozzle holes. Since the processing liquid spreads further to both sides by colliding at one point on the front extension line, the processing liquid can be spread over a narrow linear wide area, and the uniform processing liquid spraying area by one nozzle increases, and the required number of nozzles increases. Less.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in FIGS. 1 and 2 will be described below. In this embodiment, FIG.
As shown in Fig. 5, while the cooked rice 4 is conveyed on the conveyor 25, the processing liquid 2 as a combined vinegar is sprayed from the processing liquid spray nozzle 11 to produce sushi rice, that is, a sushi rice. However, the present invention can also be applied to a case where liquid processing is performed so as to obtain various kinds of rice such as pilaf and chicken rice. In addition to the above-mentioned seasoning treatment, the liquid treatment can be applied to any treatment performed by spraying the treatment liquid 2, such as a sanitary treatment of various foods, a color treatment, and a fatigue prevention treatment.

The spraying of the combined vinegar easily corrodes the exhaust duct (not shown) as described above. In addition, when seasoning the rice for pilaf, the processing liquid contains oil, so that the exhaust duct is easily contaminated.

In the present embodiment, using a device as shown in FIG. 1, an air 3 which blows the processing liquid 2 which flows down naturally from the nozzle hole 11a or flows down at a low pressure close to the nozzle hole 11a from obliquely above both sides thereof. Then, the treatment liquid 2 is sprayed on the cooked rice 4 while being diffused toward the cooked rice 4 which is an object to be treated, and liquid treatment is performed.

As a result, the processing liquid 2 which naturally flows down from the nozzle hole 11a or flows down at a low pressure close to the nozzle hole 11a tends to be in a dripping state as the flow rate is small and the viscosity is high.
The higher the flow rate and the lower the viscosity, the more likely it is to have a continuous laminar flow state. In any case, the nozzle hole 11a or the nozzle 11 having the nozzle hole 11a does not function to subdivide the processing liquid 2 flowing down.

The processing liquid 2 which has flowed out from the nozzle hole 11a at a predetermined flow rate is blown obliquely from above on both sides of the processing liquid 2 to collide with the cooked rice 4 and, as shown in FIG. The air 3 is blown off by the air 3 and diffused almost uniformly in the same area as the air 3. Therefore, the processing liquid 2 can be diffused in a predetermined range determined by the supply conditions of the air 3 and can be evenly dispersed on the cooked rice 4 at any set required flow rate. Particles of the processing liquid 2 diffused by the matching air 3 are much larger than in the conventional case where the processing liquid 2 is atomized by the spray nozzle, and are not sucked and discharged by the exhaust gas. It is possible to process the cooked rice 4 with no excess or shortage at a set flow rate without consumption. Further, it is possible to prevent the treatment liquid from adhering to the exhaust system and causing early contamination and corrosion.

As shown in FIG. 1, the apparatus for performing the above-described liquid processing includes a processing liquid outflow passage 1 for allowing the processing liquid 2 to flow naturally or at a low pressure close thereto from the nozzle hole 11a.
2 and a processing liquid spray nozzle 11 having an air passage 13 for blowing air 3 from a diagonal upper side on both sides of the nozzle hole 11a and a processing liquid outflow path 12. Supply means 15 for supplying air at a predetermined flow rate, air supply means 15 for supplying air 3 to the air passage 13 at a predetermined pressure, and aseptic processing means 16 for sterilizing the supplied air 3. .

The treatment liquid 2 is set so that the vinegar content is about 10% and the salt content is about 0.4-0.6% based on the amount of cooked rice. Since sugar is added during the rice cooking process to prevent the fatigue of cooked rice, the supply of saccharides is omitted in the liquid treatment process. Describing the sweetening in the rice cooking process, the steamed rice is divided into primary steaming and secondary steaming, and the rice after the primary steaming is secondarily immersed in warm water, and then subjected to secondary immersion in warm water. In addition, a sugar-containing component, for example, a saccharide for preventing fatigue such as oligosaccharide is mixed, and this is multiplied by water absorption at the time of secondary immersion to penetrate well into the inside of the rice grain, and the life is prolonged due to fatigue prevention. Make it 5 times. By this sweetening, the replenishment of the sugar content required for the combined vinegar is also satisfied at the same time. Needless to say, all the components necessary for the combined vinegar may be supplied and sprayed during the liquid treatment.

The processing liquid supply means 14 of this embodiment sends out the processing liquid in a tank 21 by a pump 22, and the processing liquid in 23 is sucked and mixed with the processing liquid, and the processing liquid is sprayed through a valve 24. 11 can be supplied at a predetermined flow rate. As many processing liquid tanks as necessary may be prepared, and a pump 22 may be provided for each required tank. When the width B1 of the processing liquid dispersing nozzle 11 in which the processing liquid 2 of the processing liquid 2 can be diffused is less than the width of the conveyer 25 carrying the cooked rice 4, the nozzle 11 is equivalent to the width of the conveyer 25 by using a plurality of combinations. The processing liquid 2 can be sprayed in a width to be set.

The processing liquid spray nozzle 11 allows the processing liquid 2 supplied at a predetermined flow rate by the processing liquid supply means 14 to flow naturally or at a low pressure close thereto, while being supplied from the compressor 27 of the air supply means 15. 1 and FIG. 2A, air 3 having a predetermined pressure is blown from above both sides of the processing liquid 2 flowing down as shown in FIG.
Due to the collision in both XX directions in 1, the processing liquid 2 is diffused in a predetermined area in the YY direction corresponding to the set pressure, and the flowing-down processing liquid 2 is substantially uniformly diffused in the predetermined area. Therefore, the liquid processing method can be automatically achieved only by setting the processing liquid spray nozzle 11 toward the cooked rice 4 as shown in FIG. Is sterilized, so that it is possible to prevent germs from adhering to the liquid supply of the cooked rice 4 due to the supply air and propagating.

The aseptic processing means 16 is for sterilizing the air 3 from the compressor 27 using, for example, a sterile filter. Breeding can be prevented. The air supply means 15 is provided with a pressure reducing valve 28 at the inlet of the aseptic processing means 16 and at the outlet of the air tank 26, so that the final supply air 3
Is regulated to a predetermined value. However, how to obtain the set pressure may be obtained without any particular method.

This is a so-called flow rate pump in which the flow rate of the processing liquid supplied by the pump 22 of the processing liquid supply means 14 can be preferentially set, and the flow rate can be set accurately and the processing liquid can be supplied more or less.

In particular, if the flow rate pump is a diaphragm pump, any high-viscosity processing liquid 2 can be accurately delivered as set by the stroke and the number of operations of the diaphragm. Can be achieved accurately without excess or deficiency.

In an example of the present embodiment, the nozzle hole 11a has a hole diameter of about 0.3 to ² mm, the supply pressures of the processing liquid and air are about 0.1 to 1 kg / cm ² , and FIG. θ1 was about 60 ° and θ2 was about 70 °, and a treatment liquid having any viscosity was suitable. In addition, although the outflow speed of the processing liquid was approximately 10 cm / sec in most cases, a favorable result was obtained. However, it is not limited to these.

As shown in FIGS. 1 and 2A and 2B, the processing liquid spray nozzle 11 has a nozzle tip 41 fastened to the tip of a main body 43 by a nut 42. Can be replaced as consumables. However, it is good also as an integral thing instead of this.

The outlet 13a is provided with an elliptical counterbore 13b having a major axis in the Y direction in which the above-mentioned air collides and diffuses. The counterbore angle in the major axis direction is θ2. It is.

As a result, the air blown out from the outlet 13a spreads along the elliptical counterbore 13b provided in the outlet 13a so as to have a large angle in the major axis direction. Mouth 13a
When the air blown from the nozzles collide with each other at one point 31 on the front extension line of the nozzle hole 11a, the processing liquid is further spread on both sides, so that the processing liquid can be diffused over a narrow linear wide area, and uniform processing by one nozzle The liquid spray area is increased and the required number of nozzles is reduced.

[0030]

According to the first aspect of the present invention, the processing liquid is diffused in a predetermined range determined by the air supply condition, regardless of the required flow rate. It can be spread almost evenly on the workpiece, and
The particles of the processing liquid to be diffused are much larger than in the conventional case where the particles are atomized by the spray nozzle, and are not discharged by the exhaust, so that the processing liquid is not consumed wastefully and is supplied at the set flow rate. Liquid processing can be performed on the processed material without excess or shortage. Further, it is possible to prevent the treatment liquid from adhering to the exhaust system and causing early contamination and corrosion.

According to the treatment liquid spraying apparatus of the second aspect of the present invention, the method of the first aspect can be automatically achieved, and the air supplied by the aseptic processing means is sterilized, so that food such as cooked rice or the like can be obtained. It is possible to prevent germs from adhering and breeding due to the supply air when performing the liquid treatment.

According to the third aspect of the present invention, the flow rate can be set more accurately and the processing liquid can be supplied without excess or deficiency.

According to the fourth aspect of the present invention, in any one of the second and third aspects of the present invention, any high-viscosity processing liquid can be sent out exactly as set up. It can be accurately achieved without any difference due to the difference in viscosity.

The processing liquid spray nozzle according to the fifth aspect of the present invention is suitable for carrying out the first aspect of the present invention, and according to the sixth aspect of the present invention, the diffusion width of the processing liquid by one nozzle is uniform. The size can be increased in the diffusion state, and the required number of nozzles can be reduced without lowering the processing function.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a liquid rice processing state according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a processing liquid spraying state of a processing liquid spray nozzle of FIG. 1;

[Explanation of symbols]

 2 treatment liquid 3 air 4 cooked rice 11 treatment liquid spray nozzle 11a nozzle hole 12 treatment liquid outflow path 13 air passage 13a outlet 13b counterbore 14 treatment liquid supply means 15 air supply means 16 aseptic treatment means 22 pump 25 conveyor 28 pressure reducing valve 41 Nozzle tip

Claims (6)

(57) [Claims] The method according to claim 1. A gravity flow from the nozzle hole or the processing liquid flowing down low at close to this, in an air that clashing blows from both sides obliquely above this, while diffused toward the side of the object, A method of spraying a processing liquid in which a processing liquid is sprayed on an object to be processed to perform liquid processing. 2. A treatment liquid and the treatment liquid outlet passage to flow down from the nozzle holes of at gravity flow or low pressure close thereto, air to hit by blowing air treatment liquid to the flowing down from both sides obliquely above near the nozzle hole A processing liquid spray nozzle having a passage, processing liquid supply means for supplying processing liquid to the processing liquid outflow path at a predetermined flow rate, and air supply means for supplying air to the air path at a predetermined pressure; An aseptic treatment means for sterilizing air, the treatment liquid spraying device comprising: 3. The apparatus according to claim 2, wherein the processing liquid supply means is a flow pump. 4. A flow pump processing liquid spraying apparatus of claim 3 wherein the diaphragm pump. 5. The method according to claim 5, wherein the treatment liquid is allowed to flow naturally to the center.
Nearby has a nozzle hole for the outflow at low pressure, the processing liquid spraying nozzle having an outlet which Ru was hit by blowing air obliquely forward extension on the same position of the nozzle holes on both sides of the nozzle holes. 6. A blow-off air hits each blow-out port .
6. The processing liquid spray nozzle according to claim 5, further comprising an elliptical dish-shaped counterbore having a long diameter in a direction of mutual diffusion .