CN212284127U - Pneumatic polishing device of diphase flow rice - Google Patents

Abstract

The utility model discloses a pneumatic burnishing device of diphase flow rice, burnishing device includes the grinding pipe, the entry end of grinding pipe links to each other with the air-blower, the exit end cover is equipped with cereal shell and collects the bag, the inner wall of grinding pipe is adhered to there is the abrasive material layer, the upside of pipe wall is connected with cereal funnel, cereal funnel is close to the entry end of grinding pipe, the downside of the pipe wall of grinding pipe is provided with the rough machining rice export, the exit end of grinding pipe is close to in the rough machining rice export, the rough machining rice export links to each other with a switch valve, switch valve links to each other through mechanical conveyor belt and cereal funnel's entry, export through first pipeline and finish machining rice and. The device simple structure, it adopts the new technique of atmospheric pressure polishing, sprays the polishing to the rice, through the diphase flow system that air current and rice flow constitute, realizes the high-efficient polishing to the rice. The polishing degree of the rice polished by the device is 3.5-9.5%, the breakage rate is 2.5-8.5%, the whiteness of rice milling is 10-14%, and the transparency is 0.3-0.7%.

Description

Pneumatic polishing device of diphase flow rice

Technical Field

The utility model relates to a rice burnishing device specifically is a pneumatic burnishing device of diphase flow rice.

Background

Rice is one of the most important food crops in the world, and about half of the world consumes rice as staple food. Its production extends over a large part of the world, with major countries concentrating mainly in asian regions, accounting for about 90% of the total world production. The rice yield of China is the first in the world, and then countries such as India, Indonesia, Vietnam, Thailand and the like. The rice in the rice product is the main finished product of the rice, the rice is hulled into brown rice, partial pericarp and embryo are ground to obtain the rice, and the annual output of the rice in the world is about 6 hundred million tons.

The rice is one of the essential food crops in human life, and the rice occupies an important position in food production regardless of planting area or yield. Approximately 39 countries around the world have up to 10 billion or more of the population who use rice as the primary food, most asian residents in particular. Rice is also a major food source for the population in our country. Besides providing main nutritional ingredients such as saccharides, protein, fat and dietary fiber for human bodies, the rice also provides a large amount of necessary trace elements such as iron, manganese, copper, zinc, selenium, calcium and the like for human bodies. The rice yield of China is kept about 2 hundred million tons, and the rice is produced by about 1.85 hundred million tons every year. Meanwhile, China is also a big rice consuming country, the annual grain consumption amount is about 1.2 hundred million tons, and the annual consumption amount per capita is about 100 kg. Therefore, the rice is a popular staple food in China and plays an important role in ensuring the national food safety.

Polishing is a crucial step in the conversion of rice to rice, and allows for better digestibility and consumer acceptance through its smooth surface treatment. But in the polishing operation process, a large amount of rice grains can be broken, the breaking rate can reach 20-50%, the effective yield of the whole rice grains can be reduced, the broken rice rate is increased, and great economic loss is caused. At present, a grinding polishing machine or a friction polishing machine is adopted for polishing rice, the structure is complex, the two kinds of polishing equipment have high shearing action under the high pressure of 5000-10000 Pa, and the grains are easy to break finally due to the high temperature generated by friction. Thus, rice friability depends to a large extent on processing strength and grain characteristics, which in turn are closely related to the rice polishing apparatus.

Disclosure of Invention

The utility model discloses the technical problem that will solve is: aiming at the defects of the prior art, the pneumatic polishing device for the rice with double-phase flow is provided, the polishing device is simple in structure, a new technology of atmospheric pressure polishing is adopted, the rice is sprayed and polished, and the high-efficiency polishing of the rice is realized through a double-phase flow system formed by air flow and rice flow. The polishing degree of the rice polished by the device is 3.5-9.5%, the breakage rate is 2.5-8.5%, the whiteness of rice milling is 10-14%, and the transparency is 0.3-0.7%.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a pneumatic burnishing device of diphase flow rice, includes the grinding pipe of horizontal setting, the entry end of grinding pipe link to each other with the air-blower, the exit end cover of grinding pipe be equipped with ventilative chaff and collect the bag, the inner wall of grinding pipe adhere to there is the abrasive material layer, the upside of the pipe wall of grinding pipe be connected with the cereal funnel, the cereal funnel be close to the entry end of grinding pipe, the downside of the pipe wall of grinding pipe be provided with rough machining rice export, rough machining rice export be close to the exit end of grinding pipe, rough machining rice export link to each other with a switching valve, switching valve through mechanical conveyer belt with the entry of cereal funnel link to each other, switching valve through first pipeline with finish machining rice export link to each other.

The utility model discloses pneumatic burnishing device of two looks flows rice simple structure, its new technology that adopts the atmospheric pressure polishing sprays the polishing to the rice, through the two looks flow systems that air current and rice flow constitute, realizes the high-efficient polishing to the rice. In the polishing process, blow the rice by the air and flow, make the surperficial quick travel of the abrasive material layer of rice grain in the grinding tube, at the in-process that passes the grinding tube, cereal and the friction of abrasive material layer, the chaff of production is collected the bag by the chaff and is collected, the air that gets into the chaff and collect the bag and arrange outward through the chaff, carry out once polishing, the chaff of once polishing back production is collected the bag by the chaff, the air that gets into the chaff and collect the bag and arrange outward through the chaff, the rough machining rice that obtains after once polishing simultaneously sends into cereal funnel and gets into the intraductal quilt of grinding and polishes once more through rough machining rice export and mechanical conveyer belt, so many times of cyclic polishing, until the polishing is accomplished. And after finishing polishing, closing the air blower, and collecting polished finish-processed rice from the finish-processed rice outlet and packaging.

Preferably, the blower is connected with the inlet end of the grinding pipe through a second pipeline, the inner wall of the second pipeline is smooth, and the second pipeline is provided with a ball center valve.

Further, the top of second pipeline with the air-blower link to each other, the bottom of second pipeline with the entry end of grinding pipe link to each other, the central line of second pipeline and vertical direction's contained angle be 2 ~ 30. The second pipeline is obliquely arranged, so that the sedimentation of wind and external dust brought by the air blower is facilitated, and the polishing degree and purity of the rice are improved.

Preferably, the bottom end of the second pipeline is connected with a downward bent elbow, and the elbow is connected with the inlet end of the grinding pipe. The design of return bend is favorable to gaseous introducing grinding pipe with the vortex form to make the rice grain roll to the exit end from the entry end of grinding pipe, reach better husk rice and polishing effect.

Further, the elbow is a semicircular elbow. The design of the semicircular bent pipe can ensure that gas enters the grinding pipe along the tangential direction of the semicircular bent pipe through 180-degree vortex, thereby further improving the rice milling and polishing effects.

Preferably, the cereal shell collecting bag is a nylon bag, and the abrasive layer is an emery abrasive layer. The nylon bag has low cost and is easy to obtain; the carborundum abrasive material layer low cost, environmental protection, the wearability is good, and long service life is the first choice on abrasive material layer, in practical application, also can choose the abrasive material layer of current other materials for use.

Further, the granularity of the carborundum abrasive layer is 60 or 80 meshes.

Compared with the prior art, the utility model has the advantages of: the utility model discloses pneumatic burnishing device of two looks flows rice simple structure, its new technology that adopts the atmospheric pressure polishing sprays the polishing to the rice, through the two looks flow systems that air current and rice flow constitute, realizes the high-efficient polishing to the rice. In the polishing process, blow the rice by the air and flow, make the surperficial quick travel of the abrasive material layer of rice grain in the grinding tube, at the in-process that passes the grinding tube, cereal and the friction of abrasive material layer, the chaff of production is collected the bag by the chaff and is collected, the air that gets into the chaff and collect the bag and arrange outward through the chaff, carry out once polishing, the chaff of once polishing back production is collected the bag by the chaff, the air that gets into the chaff and collect the bag and arrange outward through the chaff, the rough machining rice that obtains after once polishing simultaneously sends into cereal funnel and gets into the intraductal quilt of grinding and polishes once more through rough machining rice export and mechanical conveyer belt, so many times of cyclic polishing, until the polishing is accomplished. And after finishing polishing, closing the air blower, and collecting polished finish-processed rice from the finish-processed rice outlet and packaging. The polishing degree of the rice polished by the device is 3.5-9.5%, the breakage rate is 2.5-8.5%, the whiteness of rice milling is 10-14%, and the transparency is 0.3-0.7%.

Drawings

FIG. 1 is a schematic structural view of a two-phase flow rice pneumatic polishing device in an embodiment.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

The pneumatic rice polishing apparatus with two-phase flow of example 1, as shown in fig. 1, comprises a grinding tube 1 transversely disposed, an inlet end of the grinding tube 1 is connected to a blower 2, an outlet end of the grinding tube 1 is sleeved with a ventilated chaff collecting bag 3, in this example, the chaff collection bag 3 is a nylon bag and an abrasive layer (not shown) is attached to the inner wall of the grinding pipe 1, which, in this embodiment, the abrasive material layer is the 60 mesh diamond dust abrasive material layers of granularity, the upside of the pipe wall of grinding pipe 1 is connected with cereal funnel 4, cereal funnel 4 is close to the entry end of grinding pipe 1, the downside of the pipe wall of grinding pipe 1 is provided with rough machining rice export 5, rough machining rice export 5 is close to the exit end of grinding pipe 1, rough machining rice export 5 links to each other with a switch valve 6, switch valve 6 links to each other through mechanical conveyer belt 7 and cereal funnel 4's entry, switch valve 6 exports 9 with the finish machining rice through first pipeline 8 and links to each other.

In example 1, the blower 2 and the inlet end of the grinding pipe 1 are connected through a second pipe 10, the inner wall of the second pipe 10 is smooth, and the second pipe 10 is provided with a ball valve 11.

In example 1, polyethylene pipes having an outer diameter of 60 to 80 mm were used for the polishing pipe 1, the first pipe 8, and the second pipe 10.

The pneumatic rice polishing apparatus according to embodiment 2 is different from embodiment 1 in that in embodiment 2, the top end of the second pipe 10 is connected to the blower 2, the bottom end of the second pipe 10 is connected to a semicircular bent pipe 12 bent downward, the semicircular bent pipe 12 is connected to the inlet end of the grinding pipe 1, and the center line of the second pipe 10 forms an angle of 5 ° with the vertical direction.

The pneumatic polishing method of the rice with double-phase flow implemented by the pneumatic polishing device of the rice with double-phase flow comprises the following steps: before polishing, setting the suction pressure of the blower 2 at 55-60 mm water column, the delivery pressure at 15-25 mm water column and the air volume at 1-2 m³Min; the moisture content of the grains is 11-12%, and the speed of the grains entering the grain funnel 4 is 0.45-0.55 kg/min; the air speed in the grinding pipe 1 is 25-35 m/s; opening the switch valve 6 and the blower 2, and introducing the grains into the grinding pipe 1 through the grain funnel 4; the mixture of cereal and air passes grinding pipe 1 fast, and at the in-process that passes grinding pipe 1, cereal and the friction of abrasive material layer carry out once polishing, and the chaff shell that once polishes the back production is collected by chaff shell collection bag 3, and the air that gets into in chaff collection bag 3 sees through chaff shell collection bag 3 and discharges outward, and the rough finish rice that obtains after polishing once is through rough finish simultaneouslyThe rice is sent into the grain funnel 4 through the rice outlet 5 and the mechanical conveyer belt 7 and then enters the grinding pipe 1 to be polished again, and the polishing is carried out for 10-50 times in a circulating manner until the polishing is finished; after finishing polishing, the blower 2 is turned off, and polished rice is collected from the polished rice outlet 9 and packaged.

The polished rice was measured for polishing degree, breakage rate, whiteness and transparency. The measurement results show that the length of the grinding pipe has an influence on the polishing degree, the breakage rate, the whiteness and the transparency of the rice milled, and the specific measurement results are as follows.

The polishing degree is measured by a weight method, and the polishing degree of the rice is 3.5% (the length of the grinding tube 1 is 1 m) to 9.5% (the length of the grinding tube 1 is more than 1 m) through measurement.

The broken and fractured rice is regarded as broken rice. The percentage of broken rice by weight of rice is called broken rice percentage. The rice is measured to have a breakage rate of 2.5-8.5% (the length of the grinding pipe 1 is 1-4 m), and meets the requirement of less than 15% specified by international standards.

The whiteness of the milled rice was measured by a color difference meter. The whiteness of the milled rice is 10-14% by measurement (the length of the grinding pipe 1 is 1-4 m).

And detecting and analyzing the transparency of the rice by a rice quality judging instrument. The transparency of the rice is measured to be 0.3 to 0.7% (the length of the grinding pipe 1 is 1 to 4 m).

Claims (7)

1. The pneumatic double-phase-flow rice polishing device is characterized by comprising a transversely-arranged grinding pipe, wherein the inlet end of the grinding pipe is connected with an air blower, the outlet end of the grinding pipe is sleeved with a ventilated grain shell collecting bag, an abrasive layer is attached to the inner wall of the grinding pipe, a grain funnel is connected to the upper side of the pipe wall of the grinding pipe, the grain funnel is close to the inlet end of the grinding pipe, a rough-processed rice outlet is arranged on the lower side of the pipe wall of the grinding pipe, the rough-processed rice outlet is close to the outlet end of the grinding pipe, the rough-processed rice outlet is connected with a switch valve, the switch valve is connected with the inlet of the grain funnel through a mechanical conveying belt, and the switch valve is connected with a fine-processed rice outlet through a first pipeline.

2. The pneumatic rice polishing device with two-phase flow as claimed in claim 1, wherein the blower is connected to the inlet end of the grinding tube via a second tube, the inner wall of the second tube is smooth, and a ball valve is installed on the second tube.

3. The pneumatic rice polishing device with two-phase flow as claimed in claim 2, wherein the top end of the second pipeline is connected with the blower, the bottom end of the second pipeline is connected with the inlet end of the grinding tube, and the included angle between the center line of the second pipeline and the vertical direction is 2-30 °.

4. The pneumatic rice polishing device as claimed in claim 3, wherein the second conduit has a downwardly curved elbow connected to the bottom end thereof, and the elbow is connected to the inlet end of the grinding tube.

5. The pneumatic rice polishing device as claimed in claim 4, wherein the curved tube is a semicircular curved tube.

6. The pneumatic rice polishing device as claimed in claim 1, wherein the collection bag is nylon and the abrasive layer is emery.

7. The pneumatic rice polishing device as claimed in claim 6, wherein the emery abrasive layer has a particle size of 60 or 80 mesh.

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