Float glass kiln

Abstract

The utility model relates to the technical field of glass kilns, in particular to a float glass kiln, which comprises a melting area (1), a clarifying area (2) and a neck (3). A first partition wall (4) is arranged between the melting zone (1) and the clarifying zone (2); a second partition wall (5) is arranged between the clarification area (2) and the neck (3); heat storage chambers (6) are arranged on the two sides of the melting zone (1) respectively; the melting zone (1) and the clarifying zone (2) are both connected with the heat storage chamber (6); the clarification area is respectively separated from the melting area and the neck by the first partition wall and the second partition wall, so that harmful furnace gas entering the upper space of the clarification area in the melting area is reduced, and stone or nodule glass defects are effectively avoided; meanwhile, the clarification area is communicated with the heat storage chamber, the temperature of checker bricks in the heat storage chamber can be increased, and then the temperature of combustion-supporting air is increased; meanwhile, bubbles in the glass liquid can be discharged easily.

Description

TECHNICAL FIELD

[0001] The utility model relates to glass kiln technical field, specifically, the utility model relates to a float glass kiln. BACKGROUND

[0002] In the float glass production process, the complex physical and chemical reactions occur in the process of converting the batch material from solid to liquid in the high-temperature kiln, which can easily produce bubbles, stones, and nodules, affecting the yield and quality. The batch material has been completely converted into liquid glass in the melting zone, but the alkali vapor and other volatile substances released during the melting process of the batch material are difficult to be completely removed by the chimney, which can easily condense on the surface of the refractory material in the relatively cold refining zone and the upper space of the working part, leading to two consequences: one is that the harmful furnace gas directly reacts with the refractory material, causing erosion of the brick body; the other is that the furnace gas forms a melt on the surface of the refractory brick, which starts to dissolve the refractory brick. Under the long-term high temperature of the furnace gas, a layer of glaze-like layer is formed on the surface of the refractory material in the refining zone. Due to the fluidity and surface tension of the layer, liquid droplets are gradually formed. With the extension of time, the liquid droplets become larger and slowly flow down under the action of gravity. When the generated liquid droplets reach a certain mass and viscosity, they fall from the kiln or flow into the glass liquid along the kiln wall to form stone or nodule defects.

[0003] The applicant found, through retrieval, that the Chinese patent document with publication number 213631608U disclosed a float glass kiln combustion-supporting wind device and a float glass kiln on July 6, 2021. The float glass kiln combustion-supporting wind device includes a first combustion-supporting wind pipeline, an oxygen source, an oxygen pipeline, and a control device. The first combustion-supporting wind pipeline is sequentially provided with a first flow adjustment valve and a first flow meter. The oxygen source is communicated with the first combustion-supporting wind pipeline through the oxygen pipeline. The oxygen pipeline is sequentially provided with a second flow meter and a second flow adjustment valve. The first flow adjustment valve, the first flow meter, the second flow meter, and the second flow adjustment valve are electrically connected with the control device. The device cannot solve the above technical problems.

[0004] Therefore, in order to improve or solve at least one of the above problems, it is necessary to provide a float glass kiln capable of reducing glass bubbles, stones, and nodule defects. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a float glass kiln capable of reducing glass bubbles, stones, and nodule defects.

[0006] In order to solve the above technical problems, the utility model adopts the technical scheme that a float glass kiln, including melting area, clarification zone and neck, be equipped with first partition wall between melting area and clarification zone, be equipped with second partition wall between clarification zone and neck, both sides of melting area are equipped with heat storage chamber, melting area and clarification zone all are connected with heat storage chamber.

[0007] Melting area and clarification zone all include ridge top, be equipped with glass liquid in melting area and clarification zone, first partition wall is connected with ridge top, and the ridge top is equipped at the top of glass liquid.

[0008] One side of neck communicates with clarification zone, the other side of neck is equipped with cooling area, be equipped with hanging wall between clarification zone and neck, second partition wall is equipped at the bottom of hanging wall, and second partition wall is equipped at the top of glass liquid.

[0009] Small furnace is connected on melting area, small furnace is equipped at both sides of melting area respectively, and small furnace is connected with heat storage chamber, clarification zone includes breast wall, be equipped with mounting hole on breast wall, mounting hole is connected with connecting channel, one end of connecting channel communicates with mounting hole, the other end of connecting channel communicates with heat storage chamber.

[0010] Reversing valve is connected on connecting channel, and reversing valve is equipped at the end of connecting channel close to clarification zone.

[0011] Grid body brick is equipped in heat storage chamber, small furnace includes small furnace channel, the end of connecting channel close to heat storage chamber is equipped with connecting channel air inlet, and grid body brick is equipped at the bottom of small furnace channel and connecting channel air inlet.

[0012] Flue is equipped at the bottom of heat storage chamber, flue is connected with smoke exhaust channel, air inlet hole is equipped on flue, air inlet hole is equipped at both sides of smoke exhaust channel respectively, one side of air inlet hole communicates with flue, the other side of air inlet hole communicates with gas supply pipe, and gate is equipped in air inlet hole.

[0013] Connecting channel is refractory material channel, and water cooling radiator is connected on reversing valve.

[0014] The beneficial effects of the present application are:

[0015] 1, the first partition wall is arranged between the melting zone and the refining zone of the application; the second partition wall is arranged between the refining zone and the necking zone; so that the refining zone becomes a relatively closed space, reducing the harmful furnace gas in the melting zone into the upper space of the refining zone, so that the refractory material in the refining zone is not easy to be eroded, and the glass defects such as stone or nodule caused by the generation of drop in the upper space of the refining zone of the ordinary kiln will not occur.

[0016] 2, the regenerator and the refining zone of the application are communicated by the connecting channel, which can participate in gas reversing; therefore, the hot gas in the refining zone is extracted to the regenerator, which has obvious heating effect on the checker bricks in the regenerator; the checker bricks can store more heat, the more the accumulated heat, the higher the heat exchange efficiency, and the more obvious the help of energy saving and consumption reduction of the production line.

[0017] 3, in the application, due to the sealing property of the refining zone and the continuous suction of the chimney on this area, the pressure of the upper space of the refining zone will be reduced; at this time, the gas remaining in the glass liquid in the refining zone will be in a supersaturated state, the gas migrates to the bubble, the bubble in the glass liquid grows, and finally escapes out of the glass liquid; when the glass liquid enters the necking zone and the working part, the pressure returns to normal, due to the increase of pressure, the volume of gas becomes smaller, the solubility of gas in the glass liquid increases, the gas changes from saturation to unsaturation, and the gas dissolves in the glass liquid; promote the further escape of the bubble in the glass liquid, improve the refining effect of the glass liquid, and reduce the bubble defects.

[0018] 4, in the application, after the connecting channel is arranged to communicate the refining zone with the regenerator, the requirement of the refining zone for high temperature refining is reduced, which can save energy or reduce the refining area compared with the traditional kiln, and save the investment cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] The specific implementation manner of the application will be further described in combination with the drawings, and the drawings are as follows:

[0020] Figure 1 It is a structural schematic view of the float glass kiln;

[0021] Figure 2 It is a sectional view of the float glass kiln;

[0022] Figure 3 It is a gas reversing schematic view of the float glass kiln;

[0023] The marks in the above drawings are as follows:

[0024] The marks in the drawings are as follows:

[0025] 1, melting zone, 101, small furnace, 102, small furnace channel,

[0026] 2, clarification zone, 201, parapet, 202, mounting hole, 203, connecting passage, 204, reversing valve, 205, connecting passage air inlet,

[0027] 3, neck,

[0028] 4, first partition wall, 401, cusp, 402, glass liquid

[0029] 5, second partition wall, 501, hanging wall,

[0030] 6, regenerator, 601, grid brick,

[0031] 7, cooling zone,

[0032] 8, flue, 801, flue passage, 802, air inlet, 803, air supply pipe, 804, gate. DETAILED DESCRIPTION

[0033] The specific embodiments of the present application are described below in detail with reference to the accompanying drawings, and the purpose is to help the technical personnel in the field to have a more complete, accurate and in-depth understanding of the inventive concept and technical scheme of the present application, and to facilitate its implementation.

[0034] Figure 1 The float glass furnace shown, comprising melting zone 1, clarification zone 2 and neck 3; the first partition wall 4 is arranged between the melting zone 1 and the clarification zone 2; the second partition wall 5 is arranged between the clarification zone 2 and the neck 3; the regenerator 6 is arranged on both sides of the melting zone 1; the melting zone 1 and the clarification zone 2 are connected with the regenerator 6.

[0035] The first partition wall 4 and the second partition wall 5 shield and separate the clarification zone 2 from the melting zone 1 and the neck 3, respectively, reducing the harmful furnace gas in the melting zone 1 from entering the upper space of the clarification zone 2, so that the refractory material in the clarification zone 2 is not easily eroded, and the clarification zone 2 upper space will not produce cusp drop as in ordinary furnaces, resulting in stone or nodule type glass defects; at the same time, the clarification zone 2 is communicated with the regenerator 6, part of the heat of the clarification zone 2 is extracted to the regenerator 6, which will increase the temperature of the grid brick 601 in the regenerator 6, and then increase the temperature of the combustion air, and finally the combustion efficiency will be improved; at the same time, it is beneficial to the discharge of bubbles in the glass liquid 402; because the heat and gas of the clarification zone 2 are extracted by the regenerator 6, the kiln pressure of the clarification zone 2 is obviously lower than that of the ordinary furnace, which is more beneficial to the discharge of gas in the glass liquid 402 and reduces the bubble defects; and because the requirement of the clarification zone 2 for high temperature clarification is reduced, the energy can be saved or the clarification area can be reduced compared with the traditional furnace, saving the investment cost.

[0036] The melting area 1 and the refining area 2 each comprise a crown 401; the melting area 1 and the refining area 2 each are provided with a glass liquid 402; the first partition wall 4 is connected with the crown 401, and the crown 401 is arranged at the top of the glass liquid 402.

[0037] The melting area 1 and the refining area 2 are respectively arranged at the front and back of the melting part of the float glass furnace, and are the positions for melting the batch and refining and homogenizing the glass liquid 402; the function of the melting area 1 is to form the glass liquid 402 through physical and chemical reactions of the batch at high temperature; and the function of the refining area 2 is to rapidly and completely discharge the bubbles in the formed glass liquid 402 to achieve the required glass liquid quality; the crown 401 is in an arc structure; the first partition wall 4 is fixedly connected to the bottom of the crown 401; the bottom of the first partition wall 4 is provided with a passage through which the glass liquid 402 can flow; the first partition wall 4 separates the melting area 1 and the refining area 2 to avoid harmful gas in the melting area 1 from entering the refining area 2.

[0038] The neck 3 is communicated with the refining area 2 at one side; the neck 3 is provided with a cooling area 7 at the other side; the refining area 2 and the neck 3 are provided with a hanging wall 501 therebetween; the second partition wall 5 is arranged at the bottom of the hanging wall 501, and the second partition wall 5 is arranged at the top of the glass liquid 402.

[0039] The neck 3 can separate the glass liquid 402 in the melting part and the cooling part to reduce the influence of various process changes in the melting part on the formed glass liquid 402 in the cooling part; the cooling area 7 can cool the glass liquid 402; the well-melted glass liquid 402 has a small viscosity and is not suitable for forming; the viscosity of the glass liquid 402 is required to reach the required viscosity range for forming through cooling; the second partition wall 5 is connected to the top of the hanging wall 501; the bottom of the second partition wall 5 is provided with a passage through which the glass liquid 402 can flow; and the second partition wall 5 can separate the refining area 2 and the neck 3.

[0040] The small furnace 101 is connected to the melting area 1; the small furnace 101 is arranged at two sides of the melting area 1 respectively; the small furnace 101 is connected with the heat storage chamber 6; the refining area 2 comprises a breast wall 201; the breast wall 201 is provided with a mounting hole 202; the mounting hole 202 is connected with a connecting passage 203; one end of the connecting passage 203 is communicated with the mounting hole 202; the other end of the connecting passage 203 is communicated with the heat storage chamber 6.

[0041] A plurality of small furnaces 101 are arranged at two sides of the melting area 1 respectively; the two ends of the small furnace 101 are communicated with the melting area 1 and the heat storage chamber 6 respectively; the connecting passage 203 is built by refractory material; the connecting passage 203 is communicated with the refining area 2 through the mounting hole 202; the hot air in the refining area 2 can enter the heat storage chamber 6 through the connecting passage 203.

[0042] The connecting passage 203 is connected with a reversing valve 204; the reversing valve 204 is arranged at the end of the connecting passage 203 close to the refining area 2.

[0043] The reversing valve 204 is installed on the connecting channel 203, and the reversing valve 204 is connected to one end of the connecting channel 203 close to the refining zone 2; the reversing valve 204 can control the flow direction of the gas in the connecting channel 203; the combustion-supporting air in the regenerator 6 can be controlled to enter the refining zone 2, or the high-temperature flue gas in the refining zone 2 can be controlled to enter the regenerator 6.

[0044] The regenerator 6 is provided with checker bricks 601; the small furnace 101 comprises a small furnace channel 102; the end of the connecting channel 203 close to the regenerator 6 is provided with a connecting channel air inlet 205; the checker bricks 601 are arranged at the bottom of the small furnace channel 102 and the connecting channel air inlet 205.

[0045] The regenerator 6 is a waste heat recovery device, which is part of a waste heat utilization system, and utilizes the checker bricks 601 made of refractory material as heat accumulators to accumulate part of the heat of the flue gas discharged from the kiln, and uses the heat to heat the combustion-supporting air entering the kiln; when the high-temperature flue gas in the kiln flows through the checker bricks 601, the checker bricks 601 are heated; in this process, the temperature of the checker bricks 601 gradually rises; the heat stored in the checker bricks 601 heats the air flowing through the checker bricks 601 after the flame is diverted, thereby ensuring that the flame has sufficient temperature to meet the needs of glass melting; in this process, the temperature of the checker bricks 601 gradually decreases, and the cycle continues; the regenerator 6 can absorb and store the heat contained in the flue gas through the checker bricks 601, and then transfer the heat to the combustion-supporting air to heat the combustion-supporting air to a certain temperature, so as to save fuel and reduce costs.

[0046] The bottom of the regenerator 6 is provided with a flue 8; the flue 8 is connected with a flue gas discharge channel 801; the flue 8 is provided with air inlets 802; the air inlets 802 are respectively arranged on both sides of the flue gas discharge channel 801; one side of the air inlet 802 communicates with the flue 8; the other side of the air inlet 802 communicates with a gas supply pipe 803; the air inlet 802 is provided with a gate 804.

[0047] Figure 3 In the middle position, the right gate 804 separates the flue 8 from the flue gas discharge channel 801, and at the same time, the right air inlet 802 communicates with the flue 8; the gas supply pipe 803 inputs the combustion-supporting air from the right air inlet 802 into the right regenerator 6; after the combustion-supporting air is heated by the checker bricks 601, the combustion-supporting air passes through the right small furnace 101 to melt the batch material in the melting zone 1; at the same time, the combustion-supporting air passes through the right connecting channel 203 to enter the refining zone 2;

[0048] The high-temperature flue gas in the kiln enters the left regenerator 6 through the small furnace 101 on the left side of the melting zone 1, and the high-temperature flue gas in the refining zone 2 enters the left regenerator 6 through the left connecting channel 203; the high-temperature flue gas enters the left flue 8 after heating the grid brick 601, at this time, the left flue 8 and the exhaust channel 801 are communicated through the left shutter 804 closing the left air inlet hole 802, and the high-temperature flue gas enters the exhaust channel 801 and is exhausted to the outside.

[0049] The connecting channel 203 is a refractory material channel; and the reversing valve 204 is connected with a water-cooled radiator.

[0050] The refractory material of the connecting channel 203 can be silica brick, high-alumina brick, magnesia-chrome brick and the like; and the water-cooled radiator can effectively cool the reversing valve 204, so that the reversing valve 204 can withstand the scouring of high-temperature gas.

[0051] The specific working process of the utility model is as follows:

[0052] The first partition wall 4 is arranged between the melting zone 1 and the refining zone 2; and the second partition wall 5 is arranged between the refining zone 2 and the neck 3; so that the refining zone 2 becomes a relatively closed space, and the harmful furnace gas in the melting zone 1 is reduced to enter the upper space of the refining zone 2.

[0053] The regenerator 6 and the refining zone 2 are communicated through the connecting channel 203, and can participate in gas reversing; so that the hot gas in the refining zone 2 is extracted to the regenerator 6, and the grid brick 601 in the regenerator 6 is obviously heated.

[0054] The physical ideal gas state equation: pV = nRT; wherein, p represents pressure, V is the volume of gas, n is the amount of substance of gas, T is thermodynamic temperature, and R is molar gas constant; when the temperature T is constant, nRT is constant, and when the gas pressure P decreases, the volume V will increase; because of the sealing property of the refining zone 2 and the continuous suction of the chimney to the region, the pressure of the upper space of the refining zone 2 will be reduced; at this time, the gas in the glass liquid 402 will be in a supersaturated state, the gas migrates to the bubble, the bubble in the glass liquid 402 grows, and finally escapes from the glass liquid 402; when the glass liquid 402 enters the neck 3 and the working part, the normal pressure is restored, the gas volume decreases due to the increase of pressure, the solubility of the gas in the glass liquid 402 increases, the gas changes from saturation to unsaturation, and the gas dissolves in the glass liquid 402; the bubbles in the glass liquid 402 are further escaped, and the refining effect of the glass liquid 402 is improved, and the bubble defects are reduced.

[0055] The gas reversing process is as follows: Figure 3As shown: the right side damper 804 separates the flue 8 from the exhaust passage 801, while the right side air inlet hole 802 is in communication with the flue 8; the air supply pipe 803 inputs combustion-supporting air from the right side air inlet hole 802 into the right side regenerator 6; after the combustion-supporting air is heated by the checker bricks 601, it passes through the right side small furnace 101 to melt the batch material in the melting zone 1; at the same time, the combustion-supporting air enters the refining zone 2 through the left side connecting passage 203;

[0056] The high-temperature flue gas in the kiln enters the left side regenerator 6 through the left side small furnace 101 in the melting zone 1, and at the same time, the high-temperature flue gas in the refining zone 2 enters the left side regenerator 6 through the left side connecting passage 203; after the high-temperature flue gas is heated by the checker bricks 601, it enters the left side flue 8; at this time, the left side damper 804 closes the left side air inlet hole 802, the left side flue 8 and the exhaust passage 801 are in communication, and the high-temperature flue gas enters the exhaust passage 801 and is exhausted to the outside.

[0057] After a specified time interval, the right side and the right side damper 804 exchange the switching state.

[0058] The above has been described by way of example with reference to the drawings. Obviously, the specific implementation of the present application is not limited to the above-mentioned manner. As long as various non-essential improvements are made by adopting the method concept and technical solution of the present application; or without improvement, the above-mentioned concept and technical solution of the present application are directly applied to other occasions, which are within the protection scope of the present application.

Claims

1. A float glass furnace characterized by: It includes melting area (1), clarification area (2) and neck (3), first partition wall (4) is arranged between melting area (1) and clarification area (2), second partition wall (5) is arranged between clarification area (2) and neck (3), both sides of melting area (1) are respectively provided with heat storage chamber (6), and melting area (1) and clarification area (2) are connected with heat storage chamber (6).

2. A float glass furnace as claimed in claim 1, characterised in that: Melting area (1) and clarification area (2) all include dome top (401), glass liquid (402) is arranged in melting area (1) and clarification area (2), first partition wall (4) is connected with dome top (401), and dome top (401) is arranged at the top of glass liquid (402).

3. A float glass furnace as claimed in claim 2, characterised in that: One side of neck (3) is communicated with clarification area (2), cooling area (7) is arranged on the other side of neck (3), hanging wall (501) is arranged between clarification area (2) and neck (3), second partition wall (5) is arranged at the bottom of hanging wall (501), and second partition wall (5) is arranged at the top of glass liquid (402).

4. A float glass furnace according to any one of claims 2 to 3, characterised in that: Small furnace (101) is connected on melting area (1), small furnace (101) is arranged on both sides of melting area (1) respectively, small furnace (101) is connected with heat storage chamber (6), clarification area (2) includes breast wall (201), mounting hole (202) is arranged on breast wall (201), connecting channel (203) is connected with mounting hole (202), one end of connecting channel (203) is communicated with mounting hole (202), and the other end of connecting channel (203) is communicated with heat storage chamber (6).

5. A float glass furnace as claimed in claim 4, characterised in that: Reversing valve (204) is connected on connecting channel (203), and reversing valve (204) is arranged at the end of connecting channel (203) close to clarification area (2).

6. A float glass furnace as claimed in claim 5, characterised in that: Lattice brick (601) is arranged in heat storage chamber (6), small furnace (101) includes small furnace channel (102), connecting channel inlet (205) is arranged at the end of connecting channel (203) close to heat storage chamber (6), and lattice brick (601) is arranged at the bottom of small furnace channel (102) and connecting channel inlet (205).

7. A float glass furnace according to any one of claims 5 to 6, characterised in that: Flue (8) is arranged at the bottom of heat storage chamber (6), flue (8) is connected with smoke exhaust channel (801), air inlet hole (802) is arranged on flue (8), air inlet hole (802) is arranged on both sides of smoke exhaust channel (801) respectively, one side of air inlet hole (802) is communicated with flue (8), the other side of air inlet hole (802) is communicated with gas supply pipe (803), and gate (804) is arranged in air inlet hole (802).

8. A float glass furnace as claimed in claim 7, characterised in that: Connecting channel (203) is refractory material channel, and water-cooling radiator is connected on reversing valve (204).

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