CN211255674U - Float glass tin bath tank bottom cooling air pipe nozzle arrangement structure - Google Patents
Float glass tin bath tank bottom cooling air pipe nozzle arrangement structure Download PDFInfo
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- CN211255674U CN211255674U CN201921083467.1U CN201921083467U CN211255674U CN 211255674 U CN211255674 U CN 211255674U CN 201921083467 U CN201921083467 U CN 201921083467U CN 211255674 U CN211255674 U CN 211255674U
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Abstract
The utility model discloses a float glass molten tin bath tank bottom cooling air pipe nozzle arrangement structure, including fan equipment, the tuber pipe system, nozzle system and control system, fan equipment is connected with nozzle system through the tuber pipe system, control system control fan equipment, wherein, nozzle system includes a plurality of round cast nozzles, a plurality of round cast nozzles are all just to the tank bottom of molten tin bath, the air supply distance of a plurality of round cast nozzles is 200 ~ 250mm, a plurality of round cast nozzles are 500 ~ 635mm along the horizontal nozzle interval of molten tin bath, a plurality of round cast nozzles are 500 ~ 635mm along the fore-and-aft nozzle interval of molten tin bath, the diameter of a plurality of round cast nozzles is 50 ~ 100 mm. The utility model discloses a nozzle is arranged in a flexible way, makes molten tin bath steel construction girder, secondary beam reduce to the minimum to the influence that the nozzle was arranged, is satisfying under the condition of molten tin bath technological requirement simultaneously, makes molten tin bath cooling air system's equipment total capacity drop to the minimum.
Description
Technical Field
The utility model relates to a technical field of float glass production especially relates to a float glass molten tin bath tank bottom cooling air pipe nozzle arrangement structure.
Background
The cooling air system at the bottom of the tin bath is a key facility for ensuring the safe operation of tin bath thermal equipment, and the cooling air system is used for comprehensively and uniformly cooling a steel plate at the bottom of the tin bath so as to keep the temperature of the outer surface of the steel plate at the bottom of the tin bath below 120 ℃ all the time during production, thereby ensuring the performance of a steel structure of the tin bath. The cooling air system mainly comprises a fan device, an air pipe system, a nozzle system and a control system. In a tin bath bottom cooling air system, how to continuously and uniformly cool a steel plate at the bottom of a tin bath is the most important way of air supply and air flow organization. At present, air supply forms such as circular tube type nozzle air supply and strip seam type nozzle air supply are often adopted in engineering, and the application of the circular tube type nozzle air supply is common, namely, the circular tube type nozzles are uniformly and densely distributed at the bottom of the whole tin bath, and continuous air cooling is carried out on a steel plate at the bottom of the tin bath, so that the temperature requirement of the tin bath process on the steel plate at the bottom of the tin bath is met.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a float glass molten tin bath tank bottom cooling air pipe nozzle arrangement structure.
In order to realize the purpose, the utility model discloses the technical scheme who takes does:
the utility model provides a float glass molten tin bath tank bottom cooling air pipe nozzle arrangement structure, includes fan equipment, tuber pipe system, nozzle system and control system, fan equipment passes through tuber pipe system with nozzle system is connected, control system control fan equipment, wherein, nozzle system includes a plurality of round cast type nozzles, and is a plurality of the round cast type nozzle is all just to the tank bottom of molten tin bath, and is a plurality of the air supply distance of round cast type nozzle is 200 ~ 250mm, and is a plurality of the round cast type nozzle is 500 ~ 635mm along the horizontal nozzle interval of molten tin bath, and is a plurality of the round cast type nozzle is 500 ~ 635mm along the fore-and-aft nozzle interval of molten tin bath, and is a plurality of the diameter of round cast type nozzle is 50 ~ 100 mm.
The arrangement structure of the cooling air pipe nozzles at the bottom of the float glass tin bath is characterized in that the air inlet temperature of the circular pipe type nozzles is not more than 40 ℃.
The arrangement structure of the cooling air pipe nozzles at the bottom of the float glass tin bath is characterized in that the residual pressure at the nozzle of the circular pipe type nozzle is not less than 500 Pa.
The arrangement structure of the cooling air pipe nozzles at the bottom of the float glass tin bath comprises a plurality of circular pipe type nozzles, wherein the air supply distance of the circular pipe type nozzles is 200mm, the distance between the circular pipe type nozzles and the horizontal nozzles of the tin bath is 500mm, the distance between the circular pipe type nozzles and the vertical nozzles of the tin bath is 500mm, and the diameter of the circular pipe type nozzles is 50 mm.
The arrangement structure of the cooling air pipe nozzles at the bottom of the float glass tin bath comprises a plurality of circular pipe type nozzles, wherein the air supply distance of the circular pipe type nozzles is 250mm, the distance between the circular pipe type nozzles and the horizontal nozzles of the tin bath is 635mm, the distance between the circular pipe type nozzles and the vertical nozzles of the tin bath is 635mm, and the diameter of the circular pipe type nozzles is 100 mm.
The utility model discloses owing to adopted above-mentioned technique, make it compare the positive effect that has with prior art and be:
(1) the utility model discloses a nozzle is arranged in a flexible way, makes molten tin bath steel construction girder, secondary beam reduce to the minimum to the influence that the nozzle was arranged, is satisfying under the condition of molten tin bath technological requirement simultaneously, makes molten tin bath cooling air system's equipment total capacity drop to the minimum.
Drawings
FIG. 1 is a schematic view of the arrangement structure of the cooling air pipe nozzles at the bottom of the float glass tin bath.
In the drawings: 1. a circular tube type nozzle; 2. tin bath
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
Fig. 1 is a schematic view of the arrangement structure of the cooling air pipe nozzles at the bottom of the float glass tin bath of the present invention, please refer to fig. 1, which shows a preferred embodiment of the arrangement structure of the cooling air pipe nozzles at the bottom of the float glass tin bath, comprising: fan equipment, the tuber pipe system, nozzle system and control system, fan equipment is connected with nozzle system through the tuber pipe system, control system control fan equipment, it is specific, nozzle system includes a plurality of round cast nozzle 1, a plurality of round cast nozzle 1 are all just to the tank bottom of molten tin bath 2, the air supply distance of a plurality of round cast nozzle 1 is 200 ~ 250mm, a plurality of round cast nozzle 1 is 500 ~ 635mm along the horizontal nozzle interval of molten tin bath, a plurality of round cast nozzle 1 is 500 ~ 635mm along the fore-and-aft nozzle interval of molten tin bath, the diameter of a plurality of round cast nozzle 1 is 50 ~ 100 mm.
In addition, as a preferred embodiment, the inlet air temperature of the circular tube type nozzle 1 is not more than 40 ℃.
In addition, as a preferred embodiment, the residual pressure at the nozzle of the circular tube type nozzle 1 is not less than 500 Pa.
Further, as a preferred embodiment, the air blowing distance of the plurality of circular tube type nozzles 1 is 200mm, the nozzle pitch of the plurality of circular tube type nozzles 1 along the transverse direction of the tin bath is 500mm, the nozzle pitch of the plurality of circular tube type nozzles 1 along the longitudinal direction of the tin bath is 500mm, and the diameter of the plurality of circular tube type nozzles 1 is 50 mm.
Further, as a preferred embodiment, the air blowing distance of the plurality of circular-tube-shaped nozzles 1 is 250mm, the nozzle pitch of the plurality of circular-tube-shaped nozzles 1 along the transverse direction of the tin bath is 635mm, the nozzle pitch of the plurality of circular-tube-shaped nozzles 1 along the longitudinal direction of the tin bath is 635mm, and the diameter of the plurality of circular-tube-shaped nozzles 1 is 100 mm.
The data calculation process of the present invention is explained below:
according to the hydrodynamics gas jet theory, the gas jet ejected by the air supply of the circular tube type nozzle belongs to turbulent flow jet. Since the outflow space is not restricted, the gas jet is an infinite space jet, also known as a free jet. The core length of the jet flow starting section can be calculated by the following formula:
S0＝0.671r0/a
wherein S is0Is the core length of the jet flow initiation section; a is a turbulence coefficient, a is determined by experiments, and the turbulence coefficient a of the circular tube type nozzle 1 is 0.08; d0The diameter of the circular tube type nozzle 1; r is0Is the radius of the circular tube type nozzle 1.
The diameter of the circular tube type nozzle 1, the jet range of the circular tube type nozzle 1 and the jet radius of the circular tube type nozzle 1 have the following relations:
R/r0＝3.4(aS/r0+0.294)
wherein S is the air supply distance of the circular tube type nozzle 1 (namely the distance between the circular tube type nozzle 1 and the bottom plate of the tin bath); r is the jet radius of the circular tube type nozzle 1 (namely the radius of the jet covering bottom plate of the circular tube type nozzle 1); d is the nozzle pitch of the circular tube type nozzle 1.
For a certain diameter of the circular tube type nozzle 1 and a certain air supply distance, the radius of the bottom plate of the tin bath covered by the emergent flow and the core length of the initial section of the jet flow can be calculated by the above formula. The calculation results are shown in Table 1.
TABLE 1
As can be seen from Table 1, when the distance from the circular tube type nozzle 1 to the bottom plate of the tin bath is 200 to 300mm, the diameter of the circular tube type nozzle 1 is larger than 50mmAll show that S is less than S0I.e. the gas jet reaching the tin bath floor is located in the jet initiation section. The average wind speed of the jet flow section is close to the axial speed, the average speed attenuation is small, and the cooling intensity is high. It can also be seen from table 1 that the jet covers a smaller radius of the floor for a given blowing distance. If the requirement that the jet radius can cover the whole tin bath bottom plate is met, the nozzle spacing of the circular tube type nozzle 1 is limited to D less than or equal to 236 mm.
Among the factors that directly affect the cooling effect, the velocity of the air stream as it reaches the bottom of the tin bath is of the greatest importance. On the premise of keeping other factors unchanged, the influence of the wind speed on the cooling effect is most obvious. The distance S between the nozzle and the bottom plate of the tin bath determines the attenuation degree of the wind speed. Core length S in jet initiation section0Within the range, the axis velocity is the same as the nozzle exit velocity. Calculation and test show that the cooling effect is optimal when the air supply distance S is kept between 200 and 250mm on the premise that the outlet speed of the nozzle is constant. The reasonable determination of the nozzle spacing is the key to ensure the cooling uniformity of the whole tin bath bottom plate. Referring to the attached figure 1 of the specification, the cooling uniformity is best when the radius of the jet can cover the whole tin bath bottom plate, namely D is 2R, and D is less than or equal to 236mm as can be seen from Table 1.
When the minimum cooling wind speed is satisfied, the number of nozzles is increased by taking D to 2R, the total air supply volume is greatly increased, and energy waste is caused. Engineering practice and test results show that when the distance D between the nozzles is 500-635 mm, the surface temperature of the most unfavorable point can be reduced to below 120 ℃. At the moment, the radius of the gas jet flow can not cover the whole tin bath bottom plate, the surface cooling of the steel plate which can not be covered by the jet flow between the nozzles is mainly realized by the heat conduction of the steel plate in the axial center area of the jet flow, and the convection heat exchange between the cooling air and the steel plate at the bottom of the bath is mainly generated in the jet flow covering area.
The comprehensive test result shows that D is0When the thickness D is 50-100 mm, S is 200-250 mm, and D is 500-635 mm, the average temperature of the steel plate at the bottom of the whole tin bath can be reduced to below 120 ℃ under the conditions that the inlet air temperature is not more than 40 ℃ and the residual pressure at the nozzle is not less than 500 Pa.
The smaller value is suitable for the float line tin bath with the daily melting amount of less than 500t/d, and the larger value is suitable for the float line tin bath with the daily melting amount of 600-900 t/d.
Under the condition of meeting the technological requirements of the tin bath, the combination can reduce the total capacity of equipment of a tin bath cooling air system to the minimum, is favorable for reducing the operation cost and saves energy.
The above description is only an example of the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and those skilled in the art should be able to realize the equivalent alternatives and obvious variations of the present invention.
Claims (5)
1. The utility model provides a float glass molten tin bath tank bottom cooling air pipe nozzle arrangement structure, includes fan equipment, tuber pipe system, nozzle system and control system, fan equipment passes through tuber pipe system with nozzle system is connected, control system control fan equipment, its characterized in that, nozzle system includes a plurality of round cast nozzle, and is a plurality of the round cast nozzle is all just to the tank bottom of molten tin bath, and is a plurality of the air supply distance of round cast nozzle is 200 ~ 250mm, and is a plurality of the horizontal nozzle interval of round cast nozzle along the molten tin bath is 500 ~ 635mm, and is a plurality of the fore-and-aft nozzle interval of round cast nozzle along the molten tin bath is 500 ~ 635mm, and is a plurality of the diameter of round cast nozzle is 50 ~ 100 mm.
2. The float glass tin bath floor cooling air duct nozzle arrangement of claim 1, wherein the inlet air temperature of the circular tube type nozzle is no greater than 40 ℃.
3. The arrangement structure of the cooling air duct nozzle at the bottom of a float glass tin bath according to claim 1, wherein the residual pressure at the nozzle of the circular tube type nozzle is not less than 500 Pa.
4. The arrangement structure of the cooling air duct nozzles at the bottom of the float glass tin bath according to claim 1, wherein the air blowing distance of the plurality of circular-tube type nozzles is 200mm, the nozzle pitch of the plurality of circular-tube type nozzles in the transverse direction of the tin bath is 500mm, the nozzle pitch of the plurality of circular-tube type nozzles in the longitudinal direction of the tin bath is 500mm, and the diameter of the plurality of circular-tube type nozzles is 50 mm.
5. The arrangement structure of the cooling air duct nozzles at the bottom of the float glass tin bath according to claim 1, wherein the air blowing distance of the plurality of circular-tube-type nozzles is 250mm, the nozzle pitch of the plurality of circular-tube-type nozzles in the transverse direction of the tin bath is 635mm, the nozzle pitch of the plurality of circular-tube-type nozzles in the longitudinal direction of the tin bath is 635mm, and the diameter of the plurality of circular-tube-type nozzles is 100 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921083467.1U CN211255674U (en) | 2019-07-11 | 2019-07-11 | Float glass tin bath tank bottom cooling air pipe nozzle arrangement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921083467.1U CN211255674U (en) | 2019-07-11 | 2019-07-11 | Float glass tin bath tank bottom cooling air pipe nozzle arrangement structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211255674U true CN211255674U (en) | 2020-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921083467.1U Active CN211255674U (en) | 2019-07-11 | 2019-07-11 | Float glass tin bath tank bottom cooling air pipe nozzle arrangement structure |
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| CN (1) | CN211255674U (en) |
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2019
- 2019-07-11 CN CN201921083467.1U patent/CN211255674U/en active Active
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