Defoamer of photovoltaic glass melting furnace with kiloton-per-day output

Abstract

The utility model relates to the technical field of glass production, in particular to a foam breaker of a photovoltaic glass melting furnace with kiloton daily output, which comprises a furnace body, a heat storage chamber and a foam breaker, the kiln body comprises a pool wall and a foam area; the defoaming devices are mounted on the side edges of the tank wall corresponding to the 5 # small furnaces on the two sides, each defoaming device comprises a nozzle, and a nozzle brick is arranged above the tank wall; and the nozzle penetrates through the nozzle brick to defoam the foam in the foam area. The utility model has the beneficial effects that: bubbles in a foam area can be punctured through medium gas, the thickness of a foam layer is reduced, the bubbles are eliminated, the overflow or absorption of the bubbles in glass liquid is promoted, the formation of the bubbles in glass is reduced, the clarification is accelerated, the clarification efficiency is improved, the glass quality is improved, the glass yield is increased, and the glass yield is increased; the economic benefit is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of glass production, in particular to a defoamer for a photovoltaic glass melting furnace with a daily output of 1,000 tons. Background Art

[0002] In the prior art, Zhou Xiang of China Building Materials (Shanghai) International Engineering Group Co., Ltd. published a scientific paper entitled "Application of Defoaming System in Oxygen Combustion Special Glass Melting Furnace" in "Building Materials World" Vol. 38, No. 005, 2017. The paper introduces the application and experience of the defoaming system in eliminating the surface foam layer on the oxy-combustion special glass melting furnace when using the float process to produce special glasses such as aluminosilicate glass, special optical glass, microcrystalline glass, high borosilicate glass, and special color glass. The above-mentioned defoaming system includes three parts: a liquid pump system, a flow regulating valve group, a defoaming gun and a gun front assembly. A pair of defoaming guns are set near the bubbling device. The above-mentioned defoaming system is easy to install and modularly assembled. The liquid pump system and the flow regulating valve group are arranged in the defoaming control room. The pipes inside the control room are made of seamless steel pipes, and the pipes from the control room to the front of the gun are made of copper pipes. During normal operation, the defoamer is added to the special solvent in a certain proportion and stirred evenly. The configured defoaming liquid is continuously and stably supplied by the liquid pump system, and the flow rate is accurately adjusted by the flow regulating valve. Finally, it is atomized by purified compressed air and sprayed into the melting furnace in a mist form through the defoaming gun. The pressure and flow rate of the atomizing gas are adjusted to control the range of action of the defoaming liquid in the kiln. In the early stage of the operation of the system, since the flow regulating valve is set in front of the defoaming gun, the operating environment is harsh when adjusting the flow rate, and the high temperature environment brings great inconvenience to the operator's debugging. At the same time, since the actual flow rate is very small, the needle valve for flow regulation may be too large, and even a small adjustment will bring great fluctuations. In order to reduce the burden on operators and adjust the flow rate more accurately and smoothly, after later improvement, a set of flow regulating valves is added to the defoaming control room, and a more suitable needle valve is selected, so that the operator can directly adjust the flow rate of the defoaming liquid in the control room. This technology is novel, reasonable and advanced. However, the defoaming system introduced by Zhou Xiang also uses defoaming liquid, which is defoamed by defoaming liquid. The defoaming cost is high, the process is complex, and it is difficult to operate. The defoaming liquid composition is prone to fluctuations, which leads to fluctuations in the foam layer, affecting the board quality and yield rate, and thus affecting the economic benefits of the enterprise. Moreover, the above defoaming system is only applicable to special glass industries such as aluminosilicate glass, special optical glass, microcrystalline glass, high borosilicate glass, and special color glass, but not to the soda-lime-silicon ultra-white rolled glass industry.

[0003] In the existing technology, there are indeed many large lines in China that are not satisfactory in melting, and they cannot give full play to the scale effect of super-large glass melting furnaces, which have great potential for energy saving and consumption reduction; the hot spot temperature of some large lines is controlled at above 1600℃ for a long time, and the hot spot temperature of some large lines is even controlled higher, but the thermal efficiency of the melting furnace is not high, and the scale benefit of super-large glass melting furnaces cannot be fully exerted; some large lines have thick foam layers in the kiln, far bubble boundaries, and high energy consumption; some large lines have too many stones for a long time, affecting production quality, unit consumption, and benefits; some large lines even have to drain water and cool down in advance because of improper melting operation and high temperature, which burns out the large arch, breast wall and crater early. In short, there are still some problems in the melting of super-large glass melting furnaces with a daily output of thousands of tons, and the melting technology needs to be improved and improved.

[0004] In the prior art, taking Xinfuxing Glass Industry Group as an example, photovoltaic glass melting furnaces above 1200t / d are generally designed with 9 pairs of small furnaces. When such large photovoltaic glass melting furnaces are in normal production, the 9 pairs of small furnaces are basically fully opened. The specific heat load distribution is roughly as shown in Table 1 below, but the heat load ratio of each pair of small furnaces is different. The problem is that when the 9# small furnace is also opened, especially the 5# small furnace is also fully opened, it will lead to process and technical problems such as thickening of the foam, elongation of the foam area, and far bubble boundaries.

[0005] Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a defoamer for a photovoltaic glass melting furnace with a daily output of 1,000 tons, which can reduce energy consumption and improve glass quality.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is: to provide a defoamer for a photovoltaic glass melting furnace with a daily output of 1,000 tons, wherein the defoamer comprises a nozzle, a defoamer medium gas passage, a defoamer air chamber and a defoamer medium gas pipeline in reverse direction of the defoamer medium flow direction;

[0008] The defoamer also includes a compressed air jet pipe, one end of which is located in the defoamer air chamber, and the other end of which passes through the pipe wall of the defoamer medium air pipe to communicate with the compressed air pipe;

[0009] The kiln comprises a pool wall and a foam zone; a nozzle brick is arranged above the pool wall; and the nozzle passes through the nozzle brick to defoam the foam in the foam zone.

[0010] Furthermore, in the defoamer of the above-mentioned 1,000-ton-per-day photovoltaic glass melting furnace, one end of the compressed air jet pipe located in the defoamer air chamber is a jet pipe with a gradually decreasing pipe diameter and a jet port diameter of 5 to 19 mm.

[0011] Furthermore, in the defoamer of the above-mentioned 1,000-ton-per-day photovoltaic glass melting furnace, the compressed air pipeline is provided with a compressed air pipeline pressure gauge, a compressed air pipeline solenoid valve and a compressed air pipeline flow meter.

[0012] Furthermore, in the defoamer of the above-mentioned 1,000-ton-per-day photovoltaic glass melting furnace, a medium gas pipeline pressure gauge, a medium gas pipeline solenoid valve and a medium gas pipeline flow meter are provided on the medium gas pipeline of the defoamer.

[0013] Furthermore, in the defoamer of the above-mentioned photovoltaic glass melting furnace with a daily output of 1,000 tons, the nozzle is a flat-mouthed shape made of 5-8 mm heat-resistant steel plate; the nozzle is a sandwich structure, and cooling air is passed through the interlayer, and the interlayer is used to cool and protect the nozzle.

[0014] Furthermore, in the above-mentioned defoamer of the thousand-ton-per-day photovoltaic glass melting furnace, the defoamer also includes a heat-resistant steel bracket installed at the lower end of the defoamer air chamber, and the height of the heat-resistant steel bracket is adjustable so that the nozzle height can be adjusted.

[0015] Furthermore, in the defoamer of the above-mentioned 1,000-ton-per-day photovoltaic glass melting furnace, the medium gas flowing in the medium gas pipeline of the defoamer is hydrogen.

[0016] The beneficial effects of the utility model are as follows: the utility model can puncture bubbles in the foam area through the medium gas, reduce the thickness of the foam layer, eliminate bubbles, promote the overflow or absorption of bubbles in the glass liquid, reduce the formation of bubbles in the glass, accelerate clarification, improve clarification efficiency, improve glass quality, increase glass production, improve glass finished product rate, and increase economic benefits. The utility model can also reduce the risk of bubbles breaking through the bubble boundary to form defects on the glass plate surface and reduce the risk of glass quality, laying a foundation for increasing benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of the relevant parts of a melting furnace of a defoamer of a photovoltaic glass melting furnace with a daily output of 1,000 tons according to a specific implementation method of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the nozzle-related parts of a defoamer of a photovoltaic glass melting furnace with a daily output of 1,000 tons according to a specific implementation method of the utility model;

[0019] Figure 3 This is a structural schematic diagram of a defoamer for a photovoltaic glass melting furnace with a daily output of 1,000 tons according to a specific implementation method of the utility model;

[0020] Description of labels:

[0021] 1. Kiln body; 11. Pool wall; 2. Regenerator; 3. Melting part; 4. Foaming area;

[0022] 5. Defoamer; 51. Nozzle; 52. Defoamer medium gas passage; 53. Defoamer air chamber; 54. Compressed air jet pipe; 55. Defoamer medium gas pipeline; 551. Medium gas pipeline pressure gauge; 552. Medium gas pipeline solenoid valve; 553. Medium gas pipeline flow meter; 56. Compressed air pipeline; 561. Compressed air pipeline pressure gauge; 562. Compressed air pipeline solenoid valve; 563. Compressed air pipeline flow meter; 57. Toothed baffle;

[0023] 6. Cooling air duct; 7. Nozzle brick; 8. Small furnace bottom plate. DETAILED DESCRIPTION

[0024] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0025] The utility model provides a defoamer for a photovoltaic glass melting furnace with a daily output of 1,000 tons. The defoamer comprises a nozzle, a defoamer medium gas passage, a defoamer air chamber and a defoamer medium gas pipeline in reverse direction of defoamer medium flow.

[0026] The defoamer also includes a compressed air jet pipe, one end of which is located in the defoamer air chamber, and the other end of which passes through the pipe wall of the defoamer medium air pipe to communicate with the compressed air pipe;

[0027] The kiln comprises a pool wall and a foam zone; a nozzle brick is arranged above the pool wall; and the nozzle passes through the nozzle brick to defoam the foam in the foam zone.

[0028] The glass liquid in the melting furnace is usually divided into a feeding area, a material processing area, a foaming area, etc. For large glass melting furnaces, especially large or super large glass melting furnaces with a daily melting capacity of thousands of tons, there will be a phenomenon of foam layer in the foam area, which seriously affects the quality of the glass plate surface and the yield rate. The utility model defoamer system is specially developed to reduce the foam layer and solve the problem of foam in the foam area, aiming to improve the quality and yield rate. This defoamer system is installed in the melting furnace 5 # Small furnace position, the above melting furnace is composed of pool bottom, pool wall, breast wall, large arch and other parts. The glass liquid in the melting furnace is usually divided into feeding area, chemical area, foam area, etc. For large glass melting furnaces, especially extra-large or super-extra-large glass melting furnaces with a daily melting capacity of thousands of tons, there will be a phenomenon of foam layer in the foam area, which seriously affects the quality of the glass plate surface and the yield rate.

[0029] The utility model can puncture bubbles in the foam area through the medium gas, reduce the thickness of the foam layer, eliminate bubbles, promote the overflow or absorption of bubbles in the glass liquid, reduce the formation of bubbles in the glass, accelerate clarification, improve clarification efficiency, improve glass quality, increase glass production, improve glass finished product rate, and increase economic benefits. The utility model can also reduce the risk of bubbles breaking through the bubble boundary to form defects on the glass plate surface and reduce the risk of glass quality, laying a foundation for increasing benefits.

[0030] Furthermore, in the defoamer of the above-mentioned 1,000-ton-per-day photovoltaic glass melting furnace, one end of the compressed air jet pipe located in the defoamer air chamber is a jet pipe with a gradually decreasing pipe diameter and a jet port diameter of 5 to 19 mm.

[0031] Furthermore, in the defoamer of the above-mentioned 1,000-ton-per-day photovoltaic glass melting furnace, the compressed air pipeline is provided with a compressed air pipeline pressure gauge, a compressed air pipeline solenoid valve and a compressed air pipeline flow meter.

[0032] Furthermore, in the defoamer of the above-mentioned 1,000-ton-per-day photovoltaic glass melting furnace, a medium gas pipeline pressure gauge, a medium gas pipeline solenoid valve and a medium gas pipeline flow meter are provided on the medium gas pipeline of the defoamer.

[0033] Furthermore, in the defoamer of the above-mentioned thousand-ton-per-day photovoltaic glass melting furnace, the nozzle is a flat-mouth shape made of 6mm heat-resistant steel plate; the nozzle is a sandwich structure, and cooling air is passed through the interlayer, and the interlayer is used to cool and protect the nozzle.

[0034] From the above description, it can be seen that the nozzle is a flat-mouthed, serrated shape made of 6mm heat-resistant steel plate through special processing, similar to the shape of a long upper lip, a short lower lip, and an upper lip hooked downward. The nozzle extending into the pool wall is a sandwich structure. Cooling air with a certain flow rate and pressure passes through the nozzle sandwich, which plays the role of cooling and protecting the nozzle.

[0035] Furthermore, in the above-mentioned defoamer of the thousand-ton-per-day photovoltaic glass melting furnace, the defoamer also includes a heat-resistant steel bracket installed at the lower end of the defoamer air chamber, and the height of the heat-resistant steel bracket is adjustable so that the nozzle height can be adjusted.

[0036] Furthermore, in the defoamer of the above-mentioned 1,000-ton-per-day photovoltaic glass melting furnace, the medium gas flowing in the medium gas pipeline of the defoamer is hydrogen.

[0037] From the above description, it can be seen that the medium gas in the medium gas pipeline of the defoamer is preferably hydrogen, which not only supports combustion but also can blow up bubbles. It is also a green fuel with no polluting gas emissions.

[0038] Example 1

[0039] See also Figure 1-3The photovoltaic glass melting furnace with a daily output of 1,000 tons in the utility model comprises a furnace body 1 and a heat storage chamber 2; the furnace body 1 comprises a pool wall 11, a melting part 3 and a foam area 4; the heat storage chamber 2 is arranged on both sides of the furnace body 1, and the heat storage chamber 2 comprises 9 pairs of small furnaces, which respectively include 1# small furnace, 2# small furnace, 3# small furnace, 4# small furnace, 5# small furnace, 6# small furnace, 7# small furnace, 8# small furnace and 9# small furnace from the feeding port to the rear; the defoamer 5 is installed on both sides of the side of the pool wall 11 corresponding to the 5# small furnace on both sides,

[0040] The defoamer of the 1,000-ton-per-day photovoltaic glass melting furnace of this embodiment includes a nozzle 51, a defoamer medium gas passage 52, a defoamer air chamber 53 and a defoamer medium gas pipeline 55 in sequence in the reverse direction of the medium flow of the defoamer; the defoamer also includes a compressed air jet tube 54, one end of which is located in the defoamer air chamber 53, and the other end passes through the pipe wall of the defoamer medium gas pipeline 55 to be connected with the compressed air pipeline 56.

[0041] The kiln comprises a pool wall 11 and a foam zone 4 ; a nozzle brick 7 is provided above the pool wall 11 and below the small furnace bottom plate 8 ; the nozzle 51 passes through the nozzle brick 7 to defoam the foam in the foam zone 4 .

[0042] The compressed air jet pipe 54 is located in the defoamer air chamber 53 at one end thereof, and the pipe diameter gradually decreases, and the jet port diameter is 5 to 19 mm. The compressed air pipe 56 is provided with a compressed air pipe pressure gauge 561, a compressed air pipe solenoid valve 562, and a compressed air pipe flow meter 563. The defoamer medium gas pipe 55 is provided with a medium gas pipe pressure gauge 551, a medium gas pipe solenoid valve 552, and a medium gas pipe flow meter 553. A plurality of tooth-shaped baffles 57 are welded on the inner wall of the defoamer medium gas passage 52.

[0043] The nozzle is a flat mouth type and sawtooth shape made by special processing of 5-8mm heat-resistant steel plate, similar to the shape of a long upper lip and a short lower lip, and the upper lip hooks down. The nozzle extending into the pool wall is a sandwich structure. In the nozzle sandwich, cooling air with a certain flow rate and pressure flows to cool and protect the nozzle. Combined with the characteristics of the lower hook tooth structure of the nozzle, the optimal angle between the nozzle spray ray and the liquid surface, and the optimal pulse effect of the mixed airflow, a better defoaming effect on the foam zone 4 is achieved.

[0044] The defoamer further comprises a heat-resistant steel bracket installed at the lower end of the defoamer air chamber 53 , and the height of the heat-resistant steel bracket is adjustable so as to adjust the nozzle height.

[0045] A cooling air duct 6 is designed and installed on the medium defoamer device to cool the device and the nozzle to prevent the defoamer from being burned. According to the thickness of the foam layer in the foam area 4, the defoaming effect, the gas medium pressure and flow rate can be adjusted and controlled by the control system.

[0046] Use of the defoamer in the above-mentioned photovoltaic glass melting furnace with a daily output of 1,000 tons:

[0047] The melting furnace is composed of four parts, namely, a melting furnace body 1, a breast wall 11, a regenerator 2 and a large arch. The regenerator 2 is composed of 9 pairs of small furnaces, forming a batch foam area 4 in front and behind the center line of the left-right symmetrical 5# small furnace.

[0048] Gradually reduce the load of the 5# and 9# small furnaces on one side in proportion, and match them to 1#, 2#, 3#, 4#, 6#, 7#, and 8# respectively; after adjusting one side, take the same method and steps to adjust the other side. Make a small adjustment every three days, and always adhere to the principle of small amounts and multiple times, and steadily and gradually advance the adjustment. According to the above principles, when the load of the 5# and 9# small furnaces is reduced to 85-100%, turn off the wind and fire of the 5# small furnace, and prepare to start the defoamer system. The nozzle is inserted into the breast wall through the nozzle brick 7, and the nozzle forms a certain angle α with the breast wall.

[0049] The best defoaming effect in foam zone 4 is achieved by optimizing the compressed air pressure, flow control and solenoid valve opening and closing, the medium gas pressure, flow control and solenoid valve opening and closing, and the best optimized matching mechanism between compressed air and medium gas through the control cabinet.

[0050] In summary, the utility model can puncture the bubbles in the foam area through the medium gas, reduce the thickness of the foam layer, achieve the purpose of eliminating bubbles, promote the overflow or absorption of bubbles in the glass liquid, reduce the formation of bubbles in the glass, accelerate clarification, improve clarification efficiency, improve glass quality, increase glass production, improve glass finished product rate, increase economic benefits, etc. # And Guan Xiao9 # Small furnace wind and fire can greatly reduce energy consumption, and play a significant role in energy saving and carbon reduction, reducing consumption, reducing costs, and increasing economic benefits. Close 5 # And Guan Xiao9 # The small furnace wind and fire reduce the high radiation of light and heat to the large arch, thereby reducing the burning damage to the large arch, saving the furnace maintenance cost, and extending the life of the extra-large glass furnace. The utility model can also reduce the risk of bubbles breaking through the bubble boundary to form defects on the glass plate surface and reduce the risk of glass quality, laying a foundation for increasing benefits.

[0051] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A defoamer for a photovoltaic glass melting furnace with a daily output of 1,000 tons, characterized in that: The defoamer comprises a nozzle, a defoamer medium gas passage, a defoamer air chamber and a defoamer medium gas pipeline in reverse defoamer medium flow direction in sequence; The defoamer also includes a compressed air jet pipe, one end of which is located in the defoamer air chamber, and the other end of which passes through the pipe wall of the defoamer medium air pipe to communicate with the compressed air pipe; The melting furnace comprises a pool wall and a foam zone; a nozzle brick is arranged above the pool wall; and the nozzle passes through the nozzle brick to defoam the foam in the foam zone.

2. The defoamer of the 1,000-ton-per-day photovoltaic glass melting furnace according to claim 1, characterized in that: The compressed air jet pipe is located at one end of the defoamer air chamber and is a jet pipe with a gradually decreasing pipe diameter and a jet port diameter of 5 to 19 mm.

3. The defoamer of the 1,000-ton-per-day photovoltaic glass melting furnace according to claim 1, characterized in that: The compressed air pipeline is provided with a compressed air pipeline pressure gauge, a compressed air pipeline solenoid valve and a compressed air pipeline flow meter.

4. The defoamer of the 1,000-ton-per-day photovoltaic glass melting furnace according to claim 1, characterized in that: The defoamer medium gas pipeline is provided with a medium gas pipeline pressure gauge, a medium gas pipeline solenoid valve and a medium gas pipeline flow meter.

5. The defoamer of the 1,000-ton-per-day photovoltaic glass melting furnace according to claim 1, characterized in that: The nozzle is in a flat mouth shape made of 5-8 mm heat-resistant steel plate; the nozzle is a sandwich structure, cooling air is passed through the sandwich, and the sandwich is used to cool and protect the nozzle.

6. The defoamer of the 1,000-ton-per-day photovoltaic glass melting furnace according to claim 1, characterized in that: The defoamer also includes a heat-resistant steel bracket installed at the lower end of the defoamer air chamber, and the heat-resistant steel bracket is height-adjustable so as to adjust the nozzle height.

7. The defoamer of the 1,000-ton-per-day photovoltaic glass melting furnace according to claim 1, characterized in that: The medium gas flowing in the medium gas pipeline of the defoamer is hydrogen.

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