KR102598850B1 - Multiple sand drying and dried sand spraying method - Google Patents

Abstract

The present invention relates to a method for drying multiple sand and spraying dried sand. The method for drying multiple sand and spraying dry sand according to an embodiment of the present invention includes the steps of measuring the moisture content of sand input into a hopper, and the measured sand. determining a drying grade according to the moisture content, operating one or more drying means according to the determined drying grade, and transferring the sand input to the hopper to the sand injection module through the transfer module and spraying the sand into the hopper or the transfer module or the sand injection module. Drying the sand by one or more drying means operating in the module and spraying the dried dry sand from the sand spraying module. Due to this, the present invention enables local procurement of a sufficient amount of dry sand required for extinguishing a metal fire regardless of the condition of the sand around the metal fire site, and further enables the production of sufficiently dried sand regardless of the humidity conditions of the surrounding sand. This prevents explosions caused by moisture in the process of extinguishing a metal fire, and at the same time, when the humidity of the surrounding sand is low, less energy is consumed in drying the sand, which has the effect of saving energy.

Description

Multiple sand drying and dried sand spraying method}

The present invention relates to a method of multiple sand drying and dried sand spraying. More specifically, when sand around a metal fire site is input, the sand is multi-dried by various drying means during the process until the input sand is sprayed, thereby causing the metal fire site to be exposed to the metal fire site. Dry sand can be produced and sprayed directly from the machine, and furthermore, by automatically adjusting the type or number of drying means that operate according to the humidity of the sand being input, sufficiently dried sand can be produced regardless of the humidity conditions of the surrounding sand, and at the same time. This relates to a multiple sand drying and dry sand spraying method that consumes less energy for sand drying when the humidity of the surrounding sand is low.

As is known, fire is an oxidation phenomenon that burns rapidly, and refers to a combustion phenomenon that spreads contrary to human intention or is caused by arson and requires fire extinguishing. Typically, in Korea, fires are classified into Class A fire, Class B fire, Class C fire, and Class D fire depending on the cause of ignition and igniting material, and the method of extinguishing these fires also varies depending on the classification.

Class A fire refers to a general fire, specifically a fire caused by igniting general combustible objects such as wood and paper. Most fires are class A fires, and the most reliable means of extinguishing fires are removing substances, spraying water to lower the temperature, or blocking oxygen.

Class B fire refers to an oil fire. Specifically, fires caused by oil ignition due to gas station fires, tank overturn accidents, etc. are classified as Class B fires. Since oil floats on water, if you try to extinguish it with water, the fire will not be extinguished but rather will spread. Therefore, sand or fire extinguishers are usually used as means of extinguishing class B fires, and water is not used. Of course, Class B fires caused by flammable liquids heavier than water can be extinguished using water, and Class B fires can be extinguished using water with dissolved surfactants.

A Class C fire refers to an electrical fire. Specifically, a fire that occurs when the covering material, etc. catches fire due to a short circuit or short circuit, is classified as a Class C fire. Water should not be used for electrical fires either. This is because it can cause electric shock and as electricity flows through the water, the fire may become bigger. However, after cutting off the electricity supply, the fire can be extinguished in the same way as a type A fire, and extinguishing it using water is also possible.

Class D fire refers to a rapid fire caused by highly reactive alkali metals such as lithium, sodium, potassium, cesium, and magnesium. To extinguish a class D fire like this, neither water nor ordinary fire extinguishers can be used. In particular, when using water to extinguish a metal fire, special care must be taken as hydrogen may be generated through a chemical reaction and a hydrogen explosion may occur.

To extinguish such metal fires, you can use a special fire extinguisher for extinguishing metal fires or use sand. In particular, since sand is easily available nearby, firefighters also often use sand to extinguish rapid fires.

However, when using sand as a means of extinguishing a metal fire, if wet sand containing more than a certain amount of moisture is used, an explosion may occur due to the moisture in the wet sand. Therefore, when sand is used to extinguish a metal fire, sufficiently dried sand must be used.

Accordingly, a device for producing dry sand by drying sand, such as the 'sand drying device' of Republic of Korea Patent No. 10-1004048, was developed. However, it is unsuitable in terms of efficiency to always prepare and store dry sand manufactured using such a device and then transport and use a sufficient amount of dry sand to the metal fire site for fire extinguishment. Procurement has limitations.

Republic of Korea Patent No. 10-1004048

The present invention is to solve the problems of the prior art mentioned above, and the purpose of the present invention is to inject sand around the metal fire site, and the sand is multiplied by various drying means during the process until the sand is sprayed. It is dried so that dry sand can be manufactured and sprayed directly at the site of a metal fire. Furthermore, the type or number of drying means that operates is automatically adjusted according to the humidity of the sand being input, so that the sand is sufficiently dried regardless of the humidity conditions of the surrounding sand. It provides a multiple sand drying and dry sand spraying method that can produce and at the same time consumes less energy for sand drying when the humidity of the surrounding sand is low.

Another object of the present invention is to place a built-in heating wire on the outer wall of the hopper so that the sand introduced into the hopper is first heated and dried, and to provide a hopper screw that transports sand upward from the inner center of the hopper to relatively reduce the influence of the heating wire on the outer wall of the hopper. It provides a multiple sand drying and dry sand injection method that improves the heat drying efficiency in the hopper by pushing the sand in the center of the hopper, which receives less, to the outer wall of the hopper.

Another object of the present invention is to determine the appropriate selection and number of drying means by measuring the humidity of dry sand sprayed through a sand spraying module and readjusting the type or number of drying means operating based on the measured humidity. It provides a multiple sand drying and dry sand spraying method that allows spraying of dried sand by self-adjusting even if the method fails.

The multiple sand drying and dry sand spraying method according to an embodiment of the present invention includes the steps of measuring the moisture content of sand input into a hopper, determining a drying grade according to the moisture content of the measured sand, and drying the determined operating one or more drying means according to the grade, and transferring the sand loaded into the hopper to the sand spraying module through the conveying module and drying the sand by one or more drying means operating in the hopper or the conveying module or the sand spraying module. It includes the step of spraying the dried sand from the sand spraying module.

At this time, in the step of determining the drying grade, the higher the moisture content of the measured sand, the higher the drying grade is determined. In the step of operating the drying means, the higher the determined drying grade, the more drying means are operated or the drying efficiency decreases. High drying means can be operated.

In addition, the drying means in the step of operating the drying means includes a hopper heating wire disposed in the hopper, a transfer heating wire arranged to surround the periphery of the transfer module, and a pump heating wire provided so that the air pump of the sand injection module supplies superheated air. may include.

In addition, the step of determining the drying grade determines the drying grade as one of four grades, and the step of operating the drying means operates the transfer heating wire or the transfer heating wire and the pump heating wire according to the determined drying grade. , or the hopper heating wire and the transfer heating wire can be operated, or the hopper heating wire, the transport heating wire, and the pump heating wire can be operated.

In addition, when the hopper heating wire is operated in the step of operating the drying means, the hopper screw disposed vertically in the center of the hopper is operated together to move the sand in the center of the hopper inner space upward and the sand at the edge of the hopper inner space to pass downward. can do.

In addition, the multiple sand drying and dry sand spraying method may include measuring the moisture content of the dry sand sprayed through the sand injection module and re-determining the drying grade based on the measured moisture content of the dry sand. .

In addition, in the step of re-determining the drying grade, if the moisture content of the measured dry sand is more than the standard content, the drying grade can be re-determined by upgrading the drying grade by one level.

According to the present invention, when sand around the metal fire site is injected, the sand is dried multiple times by various drying means during the process until the input sand is sprayed, so that dry sand can be manufactured and sprayed directly at the metal fire site, thereby creating a metal fire site. Regardless of the condition of the surrounding sand, it is possible to locally procure a sufficient amount of dry sand required to extinguish a metal fire, and furthermore, the type or number of drying means that operates is automatically adjusted according to the humidity of the sand being input. Regardless of the conditions, sufficiently dry sand can be produced, preventing explosions caused by moisture during the metal fire extinguishing process. At the same time, when the humidity of the surrounding sand is low, less energy is consumed for drying the sand, resulting in energy saving. There is.

In addition, the present invention has a heating wire built into the outer wall of the hopper so that the sand introduced into the hopper is first heated and dried, and a hopper screw is provided to transport sand upward from the inner center of the hopper, so that the hopper center is relatively less affected by the heating wire on the outer wall of the hopper. This has the effect of improving the heating and drying efficiency in the hopper by pushing the sand to the outer wall of the hopper.

In addition, the present invention measures the humidity of the dry sand sprayed through the sand injection module and readjusts the type or number of drying means operating based on the measured humidity, so that even if it fails to select and determine the number of appropriate drying means, By readjusting the dried sand so that it can be sprayed, it is possible to prevent explosions during metal fire extinguishing work due to continuous spraying of sand that is not sufficiently dried.

Figure 1 is a diagram schematically showing a multiple sand drying and dry sand spraying device to which the multiple sand drying and dry sand spraying method according to an embodiment of the present invention is applied.
Figure 2 is a functional block diagram of a multi-sand drying and dry sand spraying apparatus according to an embodiment of the present invention.
Figure 3 is a flowchart showing a multiple sand drying and dry sand spraying method according to an embodiment of the present invention.
Figure 4 is a flow chart illustrating in more detail the operation process of the drying means according to the drying grade of the multiple sand drying and dry sand spraying method according to an embodiment of the present invention.
Figure 5 is a diagram schematically showing a hopper according to an embodiment of the present invention.
Figure 6 is a diagram schematically showing a transfer module and a heating module according to an embodiment of the present invention.
Figure 7 is a diagram schematically showing a separation module and a sand injection module according to an embodiment of the present invention.

It should be noted that the technical terms used in the present invention are only used to describe specific embodiments and are not intended to limit the present invention. In addition, the technical terms used in the present invention, unless specifically defined in a different sense in the present invention, should be interpreted as meanings generally understood by those skilled in the art in the technical field to which the present invention pertains, and are not overly comprehensive. It should not be interpreted in a literal or excessively reduced sense. Additionally, if the technical term used in the present invention is an incorrect technical term that does not accurately express the idea of the present invention, it should be replaced with a technical term that can be correctly understood by a person skilled in the art.

Additionally, as used in the present invention, singular expressions include plural expressions unless the context clearly dictates otherwise. In the present invention, terms such as “consists of” or “comprises” should not be construed as necessarily including all of the various components or steps described in the invention, and some of the components or steps are included. It may not be possible, or it should be interpreted as including additional components or steps.

In addition, it should be noted that the attached drawings are only intended to facilitate easy understanding of the spirit of the present invention, and should not be construed as limiting the spirit of the present invention by the attached drawings.

Hereinafter, the multiple sand drying and dry sand spraying methods according to the present invention will be examined in more detail with reference to the attached drawings.

Figure 1 is a diagram schematically showing a multiple sand drying and dry sand spraying device to which a multiple sand drying and dry sand spraying method is applied according to an embodiment of the present invention, and Figure 2 is a diagram schematically showing a multiple sand drying and dry sand spraying device according to an embodiment of the present invention. This is a functional block diagram of the drying and dry sand spraying device.

The multiple sand drying and dry sand spraying method (hereinafter referred to as the 'dry sand spraying method') according to this embodiment allows dry sand to be manufactured and sprayed directly at the metal fire site, and furthermore, to adjust to the humidity of the sand being input. By automatically adjusting the type or number of operating drying means, sufficiently dried sand can be produced regardless of the humidity condition of the surrounding sand, and at the same time, when the humidity of the surrounding sand is low, less energy is consumed for drying the sand. .

For this purpose, the multiple sand drying and dry sand spraying device (hereinafter referred to as 'dry sand spraying device') to which the dry sand spraying method according to this embodiment is applied is a hopper (10) into which sand is input and which primary dries the input sand. ), a transfer module 20 that transfers the primarily dried sand from the hopper 10 toward the sand injection module 50, and a heating module 30 that secondarily dries the sand transferred toward the sand injection module 50. ) and a separation module 40 that separates dry sand less than a predetermined volume from the dry sand transferred from the transfer module 20 and supplies it to the sand spraying module 50, and the dry sand supplied from the separation module 40. A sand injection module 50 that performs third drying and spraying, a first moisture measurement module 60 that measures the moisture content of the sand input to the hopper 10, and a drying grade required according to the moisture content of the sand input. A grade determination unit 70 for determining the grade, a transfer control unit 80 for controlling the heating module 30 and the transfer module 20 so that sand drying is performed on the transfer module 20 according to the determined drying grade, and the determined drying grade. a hopper control unit 90 that controls the hopper 10 so that sand drying is performed in the hopper 10 according to the hopper 10, and a sand injection module 50 that controls the sand injection module 50 to dry sand in the sand injection module 50 according to the determined drying grade. It may be configured to include an injection control unit 100 that controls it.

To be described in more detail with reference to FIG. 1 , sand from around the metal fire site may be input into the hopper 10 . At this time, the hopper 10 is equipped with a hopper heating wire (12 in FIG. 5) to heat the input sand and perform primary drying. A more detailed description of the hopper 10, including the configuration for primary drying in the hopper 10, will be described later with reference to FIG. 5.

The transfer module 20 may form a transfer path of a predetermined length arranged in a horizontal direction with the ground. The hopper 10 is disposed at the top of one side of the transfer module 20, and sand passing through the hopper 10 may flow into one side of the transfer module 20. The transfer module 20 transfers sand introduced from one side to the separation module 40 disposed below the other side along the transfer path, and in this process, the transferred sand may be secondary dried.

Specifically, the heating module 30 that heats and dries the sand so that it is secondaryly dried during the process of transporting the sand along the transfer module 20 may be arranged to surround a portion of the transfer module 20. That is, the sand transported toward the sand spraying module 50 along the transport module 20 may be dried by the heat generated from the heating module 30 surrounding the transport module 20.

When the sand heated by the heating module 30 during transport and secondary dried is transferred to the separation module 40, the separation module 40 separates the transferred sand by volume, discharges sand over a certain volume to the outside, and separates the sand by volume. Sand less than the volume can be supplied to the sand injection module 50. The sand injection module 50 can spray the supplied sand, and in this process, the sand can be dried a third time using superheated air. Specifically, the sand injection module 50 can generate superheated compressed air and use the generated superheated compressed air to spray sand toward the target point and perform third drying at the same time.

With these configurations, the present invention can directly produce dry sand using sand around the metal fire site without preparing separate dry sand, and the manufactured dry sand can be immediately sprayed around the metal fire site. Regardless of the sand condition (humidity), a sufficient amount of dry sand required to extinguish a metal fire can be procured locally. In addition, this method of locally procuring dry sand eliminates the need to produce and store dry sand in advance, which has the effect of reducing the means and costs for storing pre-produced dry sand.

In particular, the dry sand spraying device according to this embodiment dries sand through multiple steps, so that sand with high humidity can be sufficiently dried and then sprayed. Therefore, the dry sand injection device according to this embodiment can prevent explosion due to moisture in the process of extinguishing a metal fire regardless of the humidity conditions of the surrounding sand.

Meanwhile, referring to FIG. 2, the first moisture measurement module 60 measures the moisture content of the sand input into the hopper 10, and the grade determination unit 70 measures the moisture content of the sand measured by the first moisture measurement module 60. Based on the moisture content of the input sand, the required drying grade of the input sand can be determined. Here, the drying grade refers to the drying strength required for the input sand to have a humidity below a predetermined level.

Specifically, the first moisture measurement module 60 is provided separately and measures the amount of moisture contained in sand (sand scheduled to be input into the hopper) around the metal fire site, or is placed inside the hopper 10 and inputs it into the hopper 10. The moisture content of sand can be measured. Here, a moisture content meter may be applied as the first moisture measurement module 60.

The grade determination unit 70 can determine the drying grade based on the moisture content of the measured sand. Specifically, the grade is set for each moisture content section and the drying grade is determined by determining which grade the moisture content value of the measured sand belongs to. can be decided. Preferably, the drying grade can be divided into stages 1 to 4, and the grade determination unit 70 can determine the drying grade to be higher as the moisture content of the measured sand is higher.

When the drying grade is determined, the hopper control unit 90 can control the hopper 10 so that primary drying occurs in the hopper according to the determined drying grade, and the transfer control unit 80 can control the heating module so that secondary drying occurs in the transfer module. (30) can be controlled, and the spraying control unit 100 can control the sand spraying module 50 to perform tertiary drying. Here, for convenience, sand drying performed in the hopper 10 is referred to as primary drying, sand drying performed in the transfer module 20 is referred to as secondary drying, and sand drying performed in the sand injection module 50 is referred to as tertiary drying. However, the first drying may be omitted and the second or third drying may be performed, the second drying may be omitted and the first or third drying may be performed, or the third drying may be omitted and the first or second drying may be performed. That is, in the injection device according to this embodiment, primary drying, secondary drying, or tertiary drying may be omitted depending on the situation.

Preferably, if the grade determination unit 70 determines the drying grade to be the lowest grade 1, the hopper control unit 90 controls the hopper 10 so that the first drying in the hopper 10 is omitted and the transfer control unit 80 Controls the heating module 30 to perform secondary drying in the transfer module 20, and the injection control unit 100 controls the sand injection module 50 to omit the tertiary drying in the sand injection module 50. can do.

And if the grade determination unit 70 determines the drying grade as grade 2, the hopper control unit 90 controls the hopper 10 so that the first drying in the hopper 10 is omitted, and the transfer control unit 80 controls the transfer module ( The heating module 30 is controlled to perform secondary drying in 20, and the injection control unit 100 can control the sand injection module 50 to perform tertiary drying in the sand injection module 50.

In addition, if the grade determination unit 70 determines the drying grade as grade 3, the hopper control unit 90 controls the hopper 10 so that primary drying is performed in the hopper 10, and the transfer control unit 80 controls the transfer module. The heating module 30 is controlled so that the secondary drying in (20) is performed, and the spraying control unit 100 can control the sand spraying module 50 so that the tertiary drying in the sand spraying module 50 is omitted. .

Finally, if the grade determination unit 70 determines the drying grade to be the highest grade 4, the hopper control unit 90 controls the hopper 10 so that primary drying is performed in the hopper 10 and the transfer control unit 80 Controls the heating module 30 to perform secondary drying in the transfer module 20, and the injection control unit 100 controls the sand injection module 50 to perform tertiary drying in the sand injection module 50. can do.

For this reason, the dry sand spraying device according to this embodiment has the effect of saving energy by consuming less energy to dry sand when the humidity of the input sand is low. In particular, the power supplied to the dry sand spraying device according to this embodiment can be supplied from a fire truck or through a separate portable battery. In this case, the power that can be supplied is limited, so this energy saving effect will be more highlighted.

However, when the drying grade was determined to be low in the grade determination unit 70 and only the minimum drying process was performed accordingly, the sprayed sand was not sufficiently dried and the sprayed sand contained more than a certain amount of moisture, thereby preventing the metal fire from being extinguished during the fire extinguishing process. An explosion may occur. To solve this problem, the dry sand injection device according to the present embodiment may be further equipped with a second moisture measurement module 110 that measures the moisture content of the dry sand sprayed from the sand injection module 50.

To be described in more detail with reference to FIG. 2, the second moisture measurement module 110 is a sand injection module 50 to measure the moisture content of dry sand sprayed through the sand injection module 50 after the drying process is completed. ) may be placed on the injection path or provided separately. Here, the second moisture measurement module 110 may also be applied as a moisture content meter like the first moisture measurement module 60.

At this time, as described above, the dry sand transferred from the transfer module 20 is separated according to volume through the separation module 40, and then the dry sand exceeding a predetermined volume is discharged to the outside, and only the dry sand less than the predetermined volume is sand sprayed. It is supplied to the module 50, and when the second moisture measurement module 110 is provided separately, the second moisture measurement module 110 is placed at a location where a predetermined volume or more of dry sand discharged to the outside is accumulated. The amount of moisture contained can be measured. This is to prevent the measured value of the second moisture measurement module 110 from being affected by compressed air that is sprayed from the sand spray module 50 during the dry sand spray process.

When the second moisture measurement module 110 measures the moisture content of the dry sand, the grade determination unit 70 may re-determine the dry grade based on the measured moisture content of the dry sand.

Specifically, if the moisture content of the dry sand is greater than the standard content, the grade determination unit 70 may re-determine the determined dry grade by upgrading it to one grade. And when the drying grade is extended and re-determined, the hopper control unit 90, the transfer control unit 80, and the injection control unit 100 can re-control each control target configuration according to the re-determined drying grade.

Figure 3 is a flowchart showing a multiple sand drying and dry sand spraying method according to an embodiment of the present invention.

Looking at the dry sand injection method according to the present embodiment step by step with reference to FIG. 3, first, the first moisture measurement module 60 measures the moisture content of the sand input into the hopper 10 (S10) and determines the grade. The drying level can be determined based on the moisture content measured in unit 70 (S20).

Once the drying grade is determined, one or more drying means may be operated according to the determined drying grade (S30). At this time, the drying means includes a hopper 10, a heating module 30, and a sand spraying module 50, More specifically, it includes the hopper heating wire of the hopper (12 in Figure 5), the transfer heating wire of the heating module (31 in Figure 6), and the pump heating wire (not shown) provided in the air pump of the sand injection module (52 in Figure 7). can do.

When the drying means according to the drying grade operates, the sand introduced into the hopper 10 flows into the transfer module 20, the sand is transferred from the transfer module 20, and the transferred sand is transferred according to the volume through the separation module 40. Among the separated and separated sand, sand less than a predetermined volume may be supplied to the sand injection module 50 and sprayed (S40). At this time, sand is dried for each order by the activated drying means.

The second moisture measurement module 110 may measure the moisture content from sand that is injected less than a predetermined volume or sand that is separated and discharged more than a predetermined volume (S50).

The grade determination unit 70 determines whether the moisture content measured by the second moisture measurement module 110 is less than the standard content value (S60), and if it is less than the standard content value (S60-Y), the drying grade can be maintained as is. there is. At this time, the standard content value may be a moisture content value that does not cause an explosion even if dry sand is put into a metal fire.

On the other hand, if the moisture content value measured by the second moisture measurement module 110 is greater than or equal to the standard content value (S60-N), the grade determination unit 70 may re-determine the determined drying grade by upgrading it to one level ( S70). And when the drying grade is re-determined, one or more drying means may operate according to the re-determined drying grade (S30).

Figure 4 is a flow chart illustrating in more detail the operation process of the drying means according to the drying grade of the multiple sand drying and dry sand spraying method according to an embodiment of the present invention.

Looking at the drying means operation process according to the drying grade according to the present embodiment in more detail with reference to FIG. 4, the hopper control unit 90, the transfer control unit 80, and the injection control unit 100 are determined by the grade determination unit 70. It is possible to determine whether the drying level is grade 1 (S31).

If the drying grade is determined to be grade 1 in the grade determination unit 70 (S31-Y), the hopper control unit 90 controls the hopper 10 so that the first drying in the hopper 10 is omitted and the transfer control unit (80) controls the heating module 30 so that the secondary drying in the transfer module 20 is performed, and the injection control unit 100 controls the sand injection module 50 so that the tertiary drying in the sand injection module 50 is omitted. ) can be controlled (S32). That is, if the drying level is determined to be level 1, only the secondary drying performed in the transfer module 20 can be performed independently.

On the other hand, if the drying grade is not determined as grade 1 in the grade determination unit 70 (S31-N), the hopper control unit 90, the transfer control unit 80, and the injection control unit 100 are determined in the grade determination unit 70. It can be determined whether the determined drying grade is grade 2 (S33).

If the grade determination unit 70 determines the drying grade to be grade 2 (S33-Y), the hopper control unit 90 controls the hopper 10 so that the first drying in the hopper 10 is omitted and the transfer control unit (80) controls the heating module 30 to perform secondary drying in the transfer module 20, and the injection control unit 100 controls the sand injection module 50 to perform tertiary drying in the sand injection module 50. ) can be controlled (S34). That is, if the drying level is determined to be level 2, secondary drying performed in the transfer module 20 and tertiary drying performed in the sand injection module 50 can be performed.

On the other hand, if the drying grade is not determined as grade 2 in the grade determination unit 70 (S33-N), the hopper control unit 90, the transfer control unit 80, and the injection control unit 100 are determined in the grade determination unit 70. It can be determined whether the determined drying grade is grade 3 (S35).

If the drying grade is determined to be grade 3 in the grade determination unit 70 (S35-Y), the hopper control unit 90 controls the hopper 10 so that primary drying is performed in the hopper 10 and the transfer control unit (80) controls the heating module 30 so that the secondary drying in the transfer module 20 is performed, and the injection control unit 100 controls the sand injection module 50 so that the tertiary drying in the sand injection module 50 is omitted. ) can be controlled (S36). That is, if the drying level is determined to be level 3, primary drying in the hopper 10 and secondary drying in the transfer module 20 can be performed.

On the other hand, if the drying grade determined by the grade determination unit 70 is not determined as grade 3 (S35-N), it means that the drying grade determined by the grade determination unit 70 is grade 4, so the hopper control unit 90 controls the hopper (10). ) controls the hopper 10 to perform primary drying in the transport module 20, the transfer control unit 80 controls the heating module 30 to perform secondary drying in the transport module 20, and the injection control unit 100 controls the sand The sand injection module 50 can be controlled so that tertiary drying is performed in the injection module 50 (S37). That is, when the drying level is determined to be level 4, primary drying in the hopper 10, secondary drying in the transfer module 20, and tertiary drying in the sand spray module 50 can all be performed.

Figure 5 is a diagram schematically showing a hopper according to an embodiment of the present invention.

As described above, sand is input into the hopper 10, and the sand input into the hopper 10 may flow into one side of the transfer module 20.

When described in detail with reference to FIG. 5, the hopper 10 has an open bottom so that the input sand can be discharged downward. At this time, a gate valve 11 may be disposed at the lower end of the hopper 10 to determine whether or not to discharge sand from the lower side. The gate valve 11 can determine whether to open the lower part of the hopper 10. At this time, the gate valve 11 may be manually operated by a user or controlled by the hopper control unit 90.

As described above, the hopper 10 is equipped with a hopper heating wire 12 to primary dry the sand flowing into the transfer module 20. Specifically, the hopper heating wire 12 may be internally disposed on the outer wall of the hopper 10. The hopper heating wire 12 heats the sand introduced into the hopper 10 and dries it first.

Preferably, a hopper screw 13 disposed in the vertical direction may be provided at the center of the hopper 10. The hopper screw 13 may be spaced apart from the outer wall of the hopper 10 by a predetermined distance. Therefore, as shown in FIG. 5, among the sand fed into the hopper 10, the sand in the center of the hopper inner space moves upward by the hopper screw 13, and the sand at the edge of the hopper inner space is not affected by the hopper screw 13. and moves downward.

That is, among the sand introduced into the hopper 10, the sand that is close to the outer wall of the hopper 10 in which the hopper heating wire 12 is built and is greatly affected by heating and drying of the hopper heating wire 12 passes downward to the transfer module 20. The sand that is discharged and is relatively far away from the outer wall of the hopper (10) and thus less affected by heating and drying by the hopper heating wire (12) cannot be discharged to the transfer module (20) and is transported upward by the hopper screw (13) to the outer wall of the hopper (10). It is pushed in this direction and moves downward through a path close to the outer wall of the hopper (10). Therefore, primary drying by the hopper heating wire 12 can be performed evenly regardless of the position of the sand introduced into the hopper 10.

Figure 6 is a diagram schematically showing a transfer module and a heating module according to an embodiment of the present invention.

As described above, the transfer module 20 transfers the sand discharged from the hopper 10 to the sand spraying module 50, and the heating module 30 heats the sand being transferred in the transfer module 20 for secondary drying. You can do it.

To be described in more detail with reference to FIG. 6, the sand that passes through the gate valve 11 of the hopper and flows into one side of the transfer module 20 is transferred to the transfer module (21) by the transfer screw 21 provided in the transfer module 20. 20) is transported to the other side. Additionally, a transfer outlet 22 may be formed at the bottom of the other side of the transfer module 20 to discharge the transferred sand toward the sand injection module 50.

The heating module 30 may include a transfer heating wire 31 disposed to surround the periphery of the transfer module 20 . Specifically, the transfer hot wire 31 may be arranged to surround a portion of the transfer path of the transfer module 20. This transfer heating wire 31 can secondary dry the sand transferred along the transfer module 20 through heating.

Figure 7 is a diagram schematically showing a separation module and a sand injection module according to an embodiment of the present invention.

As described above, the dry sand supplied to the sand injection module 50 is dry sand less than a predetermined volume, and for this purpose, the separation module 40 can separate the dry sand transferred from the transfer module 20 according to the volume. .

For this purpose, the separation module 40 includes a separation net 41 that separates the dry sand according to its volume, and a guide plate 42 that transfers and supplies the separated dry sand less than a predetermined volume to the sand injection module 50. It can be configured as follows.

To be described in more detail with reference to FIG. 7, the separation net 41 may be disposed on one side below the transfer outlet 22 so that the dry sand discharged from the transfer outlet 22 of the transfer module settles. The dry sand discharged from the transfer outlet 22 settles on the upper side of the separation net 41, and the separation net 41 allows dry sand (S1) less than a predetermined volume among the dry sand settled on the upper side to pass to the lower side and collects the predetermined volume. A plurality of holes having a predetermined volume may be formed to prevent the dry sand S2 from passing through.

Preferably, the separation net 41 may be formed to be inclined at a predetermined angle so that dry sand S2 of a predetermined volume or more that fails to pass downward falls from one side and is discharged to the outside. At this time, the dry sand (S2) discharged to the outside may also contain foreign substances exceeding a predetermined volume.

Preferably, the separation module 40 may be provided with a vibration module that promotes separation of dry sand according to volume and generates vibration so that dry sand of a predetermined volume (S2) or more moves to one side along the slope.

Meanwhile, dry sand (S1) less than a predetermined volume that has passed through the separation net 41 may be supplied to the sand injection module 50 through the guide plate 42. The guide plate 42 is disposed on the lower side of the separation net 41 so that dry sand (S1) less than a predetermined volume that has passed through the separation net 41 is seated, and the settled dry sand (S1) is transferred to the sand injection module 50. It may be arranged to be inclined downward at a predetermined angle toward the sand injection module 50 to supply sand. When the separation module 40 is equipped with a vibration module, the guide plate 42 is also affected by vibration generated from the vibration module, and this vibration causes sand (S1) of less than a predetermined volume on the guide plate 42 to be removed from the sand injection module. It can promote movement toward (50).

In this way, the separation module 40 according to the present embodiment separates only the sand (S1) less than a predetermined volume from the dry sand so that the sand injection module 50 can spray the dry sand (S1) less than a predetermined volume. It can be supplied to the module 50. Therefore, the dry sand spraying method according to this embodiment can spray only dry sand less than a predetermined volume, which can improve the spray range of dry sand, improve firefighting efficiency, and sand (rocks) more than a predetermined volume. It can prevent injuries or damage caused by spraying together.

The sand injection module 50 may spray the supplied dry sand using compressed air as described above. For this purpose, the sand injection module 50 includes a spray hose 51 that forms a guide path to spray the dry sand supplied from the guide plate 42 toward the target point, and a dry sand spray through the spray hose 51. An air pump 52 that is connected to the injection hose 51 and generates compressed air may be provided.

At this time, the sand injection module 50 may be further equipped with a pump heating wire that heats the compressed air generated by the air pump 52 to generate compressed air in an overheated state. Compressed air superheated by the pump heating wire can thirdly dry the dry sand sprayed through the spray hose 51.

As described above, among the dry sand transferred through the transfer module 20, dry sand exceeding a predetermined volume does not pass through the separation net 41 and is separated and discharged to one side. However, the dry sand (S2) of a predetermined volume or more that is separated and discharged in this way may fall from one side of the separation net 41 and accumulate at the falling point. Also, if sand accumulates excessively at the landing point, there is a problem that it may form an obstacle and interfere with fire suppression operations.

To solve this problem, the separation module 40 according to this embodiment may be equipped with a fan that blows wind toward the falling point.

The fan of the separation module 40 may operate to disperse dry sand of a predetermined volume or more accumulated at the landing point, or may disperse dry sand of a predetermined volume or more falling toward the landing point to prevent it from accumulating at the landing point.

Therefore, the dry sand spraying method according to this embodiment can reduce the separately discharged sand from excessively accumulating in a specific location to form an obstacle, and prevent fire suppression operations from being interfered with by the formed sand obstacle.

Preferably, when the second moisture measurement module 110 is placed at the falling point, the fan of the separation module 40 may be placed toward a space above the falling point at a predetermined height to improve the accuracy of the measured value.

The above description is merely an illustrative explanation of the technical idea of the present invention, and those skilled in the art will be able to make various modifications and changes without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

10: Hopper
11: gate valve
12: Hopper heating wire
20: transfer module
21: transfer screw
22: transfer outlet
30: heating module
31: transfer heating wire
40: separation module
41: separation net
42: guide plate
50: Sandblasting module
51: spray hose
52: air pump
60: first moisture measurement module
70: Grade determination unit
80: transfer control unit
90: Hopper control unit
100: injection control unit
110: second moisture measurement module

Claims (7)

Measuring the moisture content of sand input into the hopper;
Determining a drying grade according to the measured moisture content of the sand;
operating one or more drying means according to the determined drying level; and
The sand introduced into the hopper is transferred to the sand injection module through the transfer module, the sand is dried by one or more drying means operating in the hopper, the transfer module, or the sand injection module, and the dried dry sand is transferred to the sand injection module. Including spraying from the spray module,
In the step of determining the drying grade, the higher the moisture content of the measured sand, the higher the drying grade is determined, and one grade out of four grades is determined,
The drying means includes a hopper heating wire disposed in the hopper, a transfer heating wire disposed to surround the periphery of the transfer module, and a pump heating wire provided to supply superheated air to the air pump of the sand injection module,
In the step of operating the drying means, the higher the determined drying grade, the more drying means are operated or the drying means with high drying efficiency is operated,
The step of operating the drying means includes operating the transfer heating wire, or operating the transfer heating wire and the pump heating wire, or operating the hopper heating wire and the transport heating wire, or operating the hopper heating wire and the transport heating wire, according to the determined drying grade. Multiple sand drying and dry sand spraying method, characterized in that operating the transfer heating wire and the pump heating wire.
delete delete delete According to claim 1,
A hopper screw disposed in a vertical direction at the center of the hopper so that when the hopper heating wire is operated in the step of operating the drying means, the sand in the center of the hopper inner space moves upward and the sand at the edge of the hopper inner space passes downward. Multiple sand drying and dry sand spraying method, characterized in that operating together.
The method of claim 1, wherein the multiple sand drying and dry sand spraying method
Measuring the moisture content of dry sand sprayed through the sand injection module; and
Multiple sand drying and dry sand spraying method, comprising the step of re-determining the dryness grade based on the measured moisture content of the dry sand.
According to claim 6,
In the step of re-determining the drying grade, if the measured moisture content of the dry sand is greater than the standard content, the drying grade is upgraded to one level and rectified.