KR101341058B1 - Energy Saving Glass Bead Shaft Kiln Production Development - Google Patents

Abstract

The present invention is a pipe body provided with an air passage between the walls, a plurality of gas burners and the inlet is formed in parallel between the both ends, the lower end is provided with an air mixing chamber, the body of the glass bead processing; A first blower connected through an air passage and a first duct, and configured to support a glass bead by forming an upward airflow inside the main body; An amplification chamber having a double wall structure in which a flow path is formed and communicating with an upper end of the main body to collect or discharge a portion of the glass beads; A heat exchanger connected to the amplification chamber through a second duct formed of a double tube and collecting the remaining glass beads through the inner tube to induce discharge to the outside; A second blower connected to the heat exchanger through a third duct to inject air into the heat exchanger; A fourth duct connecting the heat exchanger to the amplification chamber so that the air injected through the second blower is supplied to the amplification chamber; The passage of the amplification chamber has a structure in communication with the outer tube of the second duct, the air supplied to the amplifier chamber passage is a fifth duct connecting the outer tube of the second duct and the air mixing chamber; And a blower connected to the heat exchanger through the sixth duct to forcibly suck and discharge the air cooled in the heat exchanger.
According to the present invention as described above, by collecting the heat radiation and the discharged heat energy generated in the shaft kiln, and reused, it is possible to reduce the heat energy, as well as to improve the economics, to enhance the competitiveness and prevent the warming effect have.

Description

Energy Saving Glass Bead Shaft Kiln Production Development

The present invention relates to a shaft kiln for the production of glass beads, and more specifically, the energy-saving glass bead that can reduce the thermal energy by collecting the heat radiation and heat energy emitted from the shaft kiln, and reused, It is about the shaft kiln of production.

Generally, glass beads are widely used throughout the industry, but among them, glass beads are used as reflective materials such as lane coating of roads and secondary industries.
Such glass beads are manufactured through a flotation molding method, that is, a shaft kiln.
However, the conventional shaft kiln has a problem that excessive consumption of thermal energy occurs because the reuse ratio of the thermal energy is insufficient.

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United States Patent Publication 4,046,548

The present invention has been made in order to solve the above problems, the present invention is to collect the heat radiation and heat energy emitted from the shaft kiln, by reusing it, to produce energy-saving glass beads that can reduce the heat energy To provide the shaft kiln.

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In order to achieve the object as described above, the present invention is a pipe body provided with an air passage between the walls, a plurality of gas burners and the inlet is formed in parallel between the both ends, the lower end is provided with an air mixing chamber, the glass bead A main body in which processing is performed; A first blower connected through an air passage and a first duct, and configured to support a glass bead by forming an upward airflow inside the main body; An amplification chamber having a double wall structure in which a flow path is formed and communicating with an upper end of the main body to collect or discharge a portion of the glass beads; A heat exchanger connected to the amplification chamber through a second duct formed of a double tube and collecting the remaining glass beads through the inner tube to induce discharge to the outside; A second blower connected to the heat exchanger through a third duct to inject air into the heat exchanger; A fourth duct connecting the heat exchanger to the amplification chamber so that the air injected through the second blower is supplied to the amplification chamber; The passage of the amplification chamber has a structure in communication with the outer tube of the second duct, the air supplied to the amplifier chamber passage is a fifth duct connecting the outer tube of the second duct and the air mixing chamber; And a blower connected to the heat exchanger through the sixth duct to forcibly suck and discharge the air cooled in the heat exchanger.

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According to the present invention as described above, by collecting the heat radiation and the discharged heat energy generated in the shaft kiln, and reused, it is possible to reduce the heat energy, as well as to improve the economics, to enhance the competitiveness and prevent the warming effect have.

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1 is an overall view shown to explain a shaft kiln according to an embodiment of the present invention, and
Figure 2 is a detailed view of the body and the heat exchanger according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.
In the description of the present invention, terms defined are defined in consideration of functions in the present invention, which may vary according to the intention or custom of a person skilled in the art and the definitions are based on the contents throughout this specification. Will have to be lowered.
1 is a general view showing a shaft kiln according to a preferred embodiment of the present invention, Figure 2 is a detailed view of the body and the heat exchanger according to a preferred embodiment of the present invention.
First, the process according to the configuration of the present invention and the helm support by the shaft kiln will be described.
Restoration by the shaft kiln is by hot air, which is divided into combustion air and secondary air.
Secondary air is supplied from the air mixture, and combustion air is divided into the air supplied from the first blower (05) after the high temperature is obtained in the air passage (17), and partly supplied to the main body (01). It is sent to the mixing chamber (1-1). The gas burner 02 mixes and combusts combustion gas sucked by the supplied hot air to heat the shaft kiln to an even temperature, and induces the support of the cullets introduced from the upper portion.
Then, the glass beads, which are floated and molded at a high temperature, are lifted by an air stream, and a part of the glass beads are dropped by the air weakening in the amplification chamber 03, and the other is mixed with the air stream to continue to rise.
Thereafter, under the process of heat-exchanging and discharging heat from the heat exchanger 04 through the second duct 10, the exhaust gas is collected and lowered by gravity due to a temperature drop, and is discharged through the air blower 07 provided in the sixth duct 11. Exhaust to the outside.
The external room temperature air flows into one side of the heat exchanger 04 through the third duct 12 by the second blower 06 to obtain a high temperature through exhaust and heat exchange. Subsequently, the fourth duct 13 discharges the upper portion of the amplification chamber into the upper duct, and changes to a higher temperature, and then the main body 01 in the air supply chamber 1-1 through the fourth duct 13. Is supplied to the secondary air to promote combustion, which is approximately 1000 ° C. in an updraft to flotation the cullet. In this process, the cullet is formed into glass beads and flows into the amplification chamber. Part of the cullet is collected by dropping due to the weakening of the airflow by the expansion, and the other part is lifted by the upward airflow, through the upper second duct 10. The flow rate is contracted due to the rapid lowering in the heat exchange process, which is collected through the exit rotary valve (not shown) at the bottom of the airflow, and glass beads can be produced through a continuous process. In this case, the glass beads produced are preferably in the range of 106 to 850 μm.

Hereinafter, each configuration of the present invention will be described in detail with reference to the accompanying drawings.
As shown in the present invention, the air passage 17 is provided between the walls, the plurality of gas burners (02) and the inlet (C) is formed side by side between the both ends, the lower air mixing chamber (1-1) Is provided, and is connected through the main body 01, the air passage 17 and the first duct 15 through which the glass beads are processed, and for raising the glass beads by forming an upward airflow inside the main body 01. The first blower (05) has a double wall structure in which a flow path is formed, and the amplification chamber (03), the amplification chamber (03) and the double tube which communicate with the upper end of the main body (01) to collect or discharge a portion of the glass beads. Is connected through a second duct 10 consisting of, through the heat exchanger 04, heat exchanger 04 and the third duct 12 to collect the remaining glass beads through the inner tube to induce discharge to the outside Connected to the second blower (06) for injecting air into the heat exchanger (04), injected through the second blower (06) The fourth duct 13 connecting the heat exchanger 04 and the flow path of the amplification chamber 03 and the flow path of the amplification chamber 03 are external to the second duct 10 so that the gas is supplied to the flow path of the amplification chamber 03. It has a structure in communication with the tubular body, the air supplied to the amplification chamber (03) flow path is the fifth duct 14 and the heat exchanger connecting the outer tubular body of the second duct 10 and the air mixing chamber (1-1) It is configured to include a blower (07) connected through the sixth duct (04), for forcibly suctioning and exhausting the air cooled in the heat exchanger (04).

The main body 01 is a vertical tube provided with an air passage 17 between the walls. The main body 01 has a height of approximately 5 m and a diameter of 800 mm, and thus has a cross-sectional area of 0.50 m 2 and a heat transfer area of 9.00 m 2.
The main body 01 has a plurality of collet inlet (C) is provided on both sides, that is close to the top as shown, a plurality of gas burners (02) in the lower side parallel to the collet inlet (C) In this case, the temperature of the furnace core, that is, the temperature inside the body 01 is maintained at a temperature of approximately 900 to 1200 ℃, which is a temperature at which the smooth processing of the glass beads can be made, the drive of the gas burner 02 Is maintained by.

The air passage 17 is a space for utilizing heat energy radiated from the high-temperature main body 01, and is connected through the first blower 05 and the first duct 15, and through the first blower 05. After the air at room temperature is supplied to the high temperature in the air passage 17 through the first duct 15, a part of the air is supplied to the main body 01, and the rest is sent to the air mixing chamber 1-1 to supply the secondary air. Mixed with
That is, the air passage 17 is utilized by using heat energy radiated from the main body 01, so that the air flowing into the main body 01 is heated to a high temperature and then supplied, so that the temperature in the main body 01 due to air inflow By preventing degradation and recycling heat radiation energy, there is an advantage that can reduce the energy consumption.
Therefore, it is possible to maintain the proper temperature in the body (01) to improve the productivity of the glass beads, as well as to reduce the defective rate due to the temperature drop, as well as to derive an energy saving effect, it can be expected to improve the competitiveness of the product have.
The recycling of heat radiation energy proceeds not only in the main body 01 but also in the second duct 10 connecting the amplification chamber 03, the amplification chamber 03 and the heat exchanger 04, as well as the heat exchanger ( 04) By recycling the arrangement (exhaust heat) through, it is possible to expect the energy saving effect through heat dissipation and rehabilitation of the arrangement, a description thereof will be described later.
On the other hand, the first blower (05) is a means for supporting the cullet supplied through the cullet inlet (C), which is applied to the conventional bead production method and a detailed description thereof will be omitted.

As shown in the amplification chamber 03, the wall has a double structure, and is approximately 6 m in height and 2.8 m in diameter.
In the amplification chamber 03, the glass beads processed by the lower end communicating with the upper end of the main body 01 are introduced into the supporting state from the main body 01 by pneumatic pressure (pressure of air by the first blower), and the introduced glass beads are introduced. Part of is collected and discharged in the amplification chamber 03, and the remainder is discharged from the heat exchanger through the second duct (10).
That is, the glass beads rise in the ascending airflow, and part of the glass beads fall to the airflow weakening in the amplification chamber 03, and some of the glass beads are mixed with the rising airflow and discharged from the heat exchanger 04 through the second duct 10, At this time, although the discharge is not shown, it is preferable that the discharge through the rotary valve connected to the heat exchanger (04).

The wall of the amplification chamber 03 is a double structure for recycling the thermal energy radiated from the amplification chamber 03.
That is, hot air (approximately 400 to 700 ° C.) introduced into the amplification chamber 03 floats along the inner tube of the second duct 10 together with the processed glass beads, and then flows into the heat exchanger 04. At this time, the glass beads are collected and discharged in the heat exchanger (04).
Then, the hot air is supplied between the walls through the fourth duct 13 connecting the heat exchanger 04 and the double wall of the amplification chamber 03 to be brought to a predetermined temperature by the heat radiation energy of the amplification chamber 03. It enters into the external appearance of the second duct 10 which communicates with the wall of the amplification chamber 03.
Air introduced into the exterior of the second duct 10 is introduced into the air mixing chamber 1-1 through the fifth duct 14 connected to the exterior of the second duct 10.
Here, the second duct 10 is made of a double tube as shown, the inner tube is connected to the interior space of the amplification chamber 03, the exterior is in communication with the wall of the amplification chamber (03).

Meanwhile, the heat exchanger 04 collects and discharges the glass beads introduced through the inner tube of the second duct 10 to the outside and is supplied through the arrangement, that is, the hot air discharged and the second blower 06. The air at room temperature is heated to a predetermined temperature through mutual heat exchange, and then supplied to the wall of the amplification chamber 03 through the fourth duct 13.
At this time, the second blower 06 is connected to the heat exchanger 04 through the third duct 12, and the exhaust temperature lowered through heat exchange is externally provided through the sixth duct 11 provided with the blower 07. Is discharged.

As described above, the present invention can reduce the energy by recycling the arrangement as well as thermal energy radiated to a high temperature, an example of which will be described in detail below.
Set the standard and condition of each component as follows.
Body dimensions: Diameter 800Ø ", cross section 0.50 ㎡, Height 5 m, Heat transfer area 9.00 ㎡,
Amplifier room: diameter 2,80mØ "height 6.00m,
Temperature: Losim 1,100 ℃, Amplification Chamber 400 ~ 700 ℃
Required air flow rate: Estimated air flow rate of upstream firing part 8 ~ 9m / sec, actually 30m / sec = volume area x wind speed x time = 0.5 x 8 ~ 9 x 3,600 = 16,000CMH,
Heating amount: Air supply, specific heat 0.288kcal / ㎥ ℃
Heat to 200 ℃ with waste heat before cullet = 900 ℃
Cullet = 1,200 kg / hr, specific heat = 0.21 kcal / kg ° C,
Loss of interstitial wind, the air before blowing is 0 ℃,
Supply calories: 1,100 x 16,000 x 0.288 = 5,068,800 kcal / hr,
Curlet heating: 1,200 x 0.21 x 900 = 226,800 kcal / hr,
Interstitial wind and others: 204,400kcal / hr (3.86%)
Total: 5,500,000 kcal / hr,

Supply 200 ℃ exhaust heat of existing equipment as secondary air, 200 x 16,000 x 0.288 = 921,600 / 5,500,000 x 100 = 16.76% reduction, required heat = 4,578,400 kcal / hr,
Gas consumption, LPG low calorific value 13,000kcal / kg Efficiency 95%, 4,578,400 / 13,000 = 352.18kg / hr, 352.18 / 0.95 = 371kg / hr,

1. Estimated heat recovery of the body:
Perfusion Calorie: 1 / K = 1 / αο + ｔ / λ + 1 / αο = 1/200 + 0.0015 / 46 + 1/200 = 100kcal / ㎡hr ℃
LMTD: Roshim 1,100 ℃ to 700 ℃, 100 ℃ outside air 650 ℃ = 1,100-650 = 450,
700-100 = 600, Δm = 600-450 / ln (600/450) = 521
Heat dissipation = 521 x 100 x 9.00 = 468,900 kcal / hr, 470,000 kcal / hr
Air flow rate = 470,000 / (550 ℃ x 0.288) = 2,967CMH, 3,300CMH Air flow control.

2. Estimated calories of exhaust:
Body perfusion recovery calories 470,000kcal / hr,
Cullet heating loss 226,800kcal / hr,
Severe winds and other losses 204,400kcal / hr
Loss from Perfusion 825,000kcal / hr
Expansion room perfusion recovery 460,000kcal / hr
Total 2,186,200 kcal / hr,
5,500,000-2,186,200 = 3,313,800kcal / hr
Exhaust temperature = 3,313,800 / (16,000 x 0.288) = 719 ℃, final exhaust air 60 ℃, heat exchange with blown air, 719 ℃-578 ℃ = 129, 60 ℃-15 ℃ = 45, Δm = 79 60 = 659, 659 x 16,000 x 0.288 = 3,000,000 kcal / hr (approximate loss of 10% in plate heat exchangers)
The outlet temperature of blown fresh air = outside air at 0 ° C and blown at 18,000CMH, 3,000,000 / 0.288 x 18.000CMH = 578 ° C.
Air flow = 21,300CMH, 33.12% more to prevent low temperature blowing between poles.
Plate heat exchanger: 3,000,000 / ((578 + outside condition) x heat flux x heat transfer area)
Secondary heating heat: As the lower part of the amplification chamber is a low temperature with rising air, it is used for dehumidifying and heating the cullet, and the high temperature above the middle is used for secondary heating.
Estimated perfusion heat: 1 / K = 1 / αο + ｔ / λ + 1 / αο = 1/200 + 0.003 / 46 + 1/100 = 91kcal / ㎡hr ℃, 600 ℃ upper part of expansion chamber, 719 ℃ upper part of blowing Air 578 ° C Final heating air 650 ° C, Heat transfer area 124 m2, LMTD = 600-578 = 22, 719-650 = 69, Δm = 69-22 = ln (69/22 = 41
Perfusion heat from the amplification chamber = 124 x 41 x 91 = 460,000 kcal / hr,
If the heat transfer surface is insufficient, increase the perfusion value of Fin inside.
Number of arrays: 470,000 kcal / hr, primary
2nd 3,000,000 + 460,000 = 3,460,000 kcal / hr
Total 3,930,000kcalhr
Final temperature: 3,460,000 / 18,000 / 0.288 = 667 ° C Minimize losses 630 ° C Combustion and secondary air to be obtained, 16,000 x 0.288 x 630 = 2,900,000kcal / hr
Heat of combustion = 5,500,000-2,900,000 = 2,600,000kcal / hr
Gas volume when using LPG: 2,600,000 / (13,000 x 0.95) = 210kg
Fuel savings: 210/371 = 56.60%

productivity :
Existing Production Method: 1,040 / 371 = 2.80 / 1.00
Improved production method (5% capacity increase due to improved combustion capacity): 1,090 / 210 = 5.19 / 1.00
Therefore, as described above, the present invention recovers and uses heat of 200 ° C. in the exhaust of the existing apparatus (shaft kiln of glass bead production), but the present invention can be estimated that heat energy of approximately 600 ° C. can be recovered. Therefore, the bead that can be produced with the existing LPG 1kg was limited to approximately 2.80kg, the present invention can be inferred that the production of 5.1kg of beads by recovering and reusing heat from the heat radiation and exhaust.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.
Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the technical spirit of the present invention, 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 construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

01: main body 02: gas burner
03: amplification chamber 04: heat exchanger
05: first blower 06: second blower
07: exhaust fan 10: second duct
11: 6th duct 12: 3rd duct
13: 4th duct 14: 5th duct
15: first duct 17: air passage
1-1: Air Mixing Room

Claims (5)

An air passage is provided between the walls, a plurality of gas burners and the inlet is formed in parallel between the both ends, the lower end is provided with an air mixing chamber, the main body is made of glass beads;
A first blower connected to the air passage through a first duct and configured to support a glass bead by forming an upward airflow inside the main body;
An amplification chamber having a double wall structure in which a flow path is formed and communicating with an upper end of the main body to collect or discharge a portion of glass beads;
A heat exchanger connected to the amplification chamber through a second duct formed of a double tube, and collecting the remaining glass beads through an inner tube to induce discharge to the outside;
A second blower connected to the heat exchanger through a third duct to inject air into the heat exchanger;
A fourth duct connecting the heat exchanger and the amplification chamber so that the air injected through the second blower is supplied to the amplification chamber;
The flow passage of the amplification chamber has a structure in communication with the outer tube of the second duct, the air supplied to the amplification chamber flow path is a fifth duct connecting the outer tube of the second duct and the air mixing chamber; And
The shaft kiln of the energy-saving glass bead production, characterized in that it comprises a; a blower connected through the heat exchanger and the sixth duct, forcibly suctioning and exhausting the air cooled in the heat exchanger. delete delete delete delete

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