CN212357012U

CN212357012U - Float glass melting furnace with 0# oxygen lance

Info

Publication number: CN212357012U
Application number: CN202021081199.2U
Authority: CN
Inventors: 刘钦; 邱志江; 戴文超; 朱明阳; 周星
Original assignee: Zhuzhou Liling Kibing Glass Co ltd
Current assignee: Zhuzhou Liling Kibing Glass Co ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-01-15
Anticipated expiration: 2030-06-12

Abstract

The utility model discloses a float glass melting furnace with 0# oxygen rifle, this float glass melting furnace is including melting the portion, the dog-house is established to melting portion one end, it has the hot spot position in the portion to melt, a plurality of first fritters are established to melting portion both sides between dog-house and hot spot position, a plurality of second fritters are established at hot spot position rear to melting portion both sides, first fritter and second fritter all communicate with melting portion, melting portion both sides in the dog-house with be closest to establish 0# oxygen rifle between the first fritter of dog-house, 0# oxygen rifle stretches into the melting intracavity of melting portion. The float glass melting furnace with the No. 0 oxygen lance can promote the melting process of a mixture, strengthen the melting convection process, ensure that glass liquid is melted uniformly, ensure that a coloring agent is distributed uniformly, and reduce the defects and the glass color difference caused by uneven distribution; the atmosphere in the melting zone can be controlled and the quality of the colored glass product can be improved.

Description

Float glass melting furnace with 0# oxygen lance

Technical Field

The utility model relates to the technical field of float glass production, in particular to a float glass melting furnace with a 0# oxygen lance.

Background

With the change of modern architectural design concept, the glass curtain wall is widely applied to office buildings with beautiful decoration and large-area windows as an outer wall. The glass curtain wall usually uses colored coated glass with good visible light transmission, good heat insulation performance and good energy-saving effect.

The colored glass is a special functional glass, and the raw materials in the production process are added with coloring agents, and the coloring agents have high requirements on the melting process of the glass. The requirements are mainly reflected in that: temperature regulation of the melting zone, heat convection of the molten glass, atmosphere control of the melting zone and the like.

In the prior art, the air and fire quantity of each small furnace of the melting furnace is regulated and controlled, or oxygen-enriched combustion is adopted for regulation. The disadvantages of both methods are: the regulation and control are too extensive, the air and fire consumption of each small furnace is large, the regulation amount for regulating the atmosphere and the temperature in the kiln is large, the efficiency is low, and the waste of energy is easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a float glass melting furnace with a 0# oxygen lance, which can promote the melting process of mixture, strengthen the melting convection process, lead the glass liquid to be melted evenly, lead the colorant to be distributed evenly, and reduce the defects and the glass color difference caused by uneven distribution; the atmosphere in the melting zone can be controlled and the product quality of the colored glass can be improved.

In order to realize above-mentioned purpose, the utility model provides a float glass melting furnace with 0# oxygen rifle, including melting the portion, the one end of melting the portion is equipped with the dog-house, has the hot spot position in melting the portion, the both sides of melting the portion are equipped with a plurality of first fritters between dog-house and hot spot position, the both sides of melting the portion are equipped with a plurality of second fritters in the rear of hot spot position, first fritter and second fritter all communicate with melting the portion, both sides melting the portion are equipped with 0# oxygen rifle between dog-house and the first fritter that is closest to the dog-house, 0# oxygen rifle stretches into the melting intracavity of melting the portion.

Further, two No. 0 oxygen lances positioned on two sides of the melting part are oppositely arranged, and the No. 0 oxygen lances are respectively communicated with a gas source and a combustion-supporting gas source through pipelines.

Further, the gas source is a natural gas supply source, and the combustion-supporting gas source is a pure oxygen supply source.

Furthermore, the No. 0 oxygen lance is a secondary combustion oxygen lance and comprises a primary oxygen pipeline, a secondary oxygen pipeline, a natural gas pipeline and an oxygen lance nozzle, wherein the oxygen lance nozzle extends into the melting part, the oxygen lance nozzle is of a three-layer concentric sleeve structure, one ends of the primary oxygen pipeline and the secondary oxygen pipeline are communicated with a pure oxygen supply source, the other ends of the primary oxygen pipeline and the secondary oxygen pipeline are respectively communicated with one sleeve of the oxygen lance nozzle, one end of the natural gas pipeline is communicated with the natural gas supply source, and the other end of the natural gas pipeline is communicated with a third sleeve of the oxygen lance nozzle.

Furthermore, the float glass melting furnace also comprises a regenerator, and the regenerator is communicated with the first small furnace and the second small furnace.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses a float glass melting furnace with 0# oxygen rifle sets up the 0# oxygen rifle through the both sides at melting portion between dog-house and the first small stove that is closest to the dog-house, can improve and melt the precaution temperature, promotes the mixture process of melting, strengthens melting the convection process, can make the glass liquid melt more even, and the colorant distributes more evenly, reduces defect and the glass colour difference because of colorant distributes uneven production.

(2) The utility model discloses a float glass melting furnace with 0# oxygen rifle through the natural gas flow that the regulation lets in 0# oxygen rifle, can adjust and melt the prozone (melting furnace prozone) space temperature, realizes adjusting melting zone mixture melting rate and dog-house convection current to reduce the production energy consumption.

(3) The utility model discloses a float glass melting furnace with 0# oxygen rifle, through adjusting the oxygen flow that lets in 0# oxygen rifle, the atmosphere that can adjust and melt the prozone is oxidation atmosphere or reduction atmosphere to adapt to the requirement of different colorants to melting the zone atmosphere, be favorable to the coloring stability of colorant and improve the colorant retention rate, make the glass colour of producing even pleasing to the eye, reach corresponding technical requirement.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view showing the structure of a float glass melting furnace having a 0# oxygen lance according to the present invention.

FIG. 2 is a schematic view of a 0# oxygen lance in a float glass melting furnace according to the present invention.

In the above figures, the following reference numerals are included:

1. a melting section; 2. a feeding port; 3. a hotspot location; 4. a first small furnace; 5. a second small furnace; 6. 0# oxygen lance; 7. a regenerator; 61. a primary oxygen line; 62. a secondary oxygen line; 63. a natural gas pipeline; 64. an oxygen lance nozzle.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.

Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by an existing method.

Referring to fig. 1 and 2, a float glass melting furnace with 0# oxygen lance of the utility model mainly comprises a melting part 1, one end of the melting part 1 is provided with a feeding port 2, and the feeding port 2 is arranged at two sides of the end part of the melting part 1; the melting part 1 is internally provided with a hot spot position 3 (namely the highest temperature point of the liquid level of glass in the melting part 1), a plurality of first small furnaces 4 are arranged between a feeding port 2 and the hot spot position 3 (namely the front zone of a melting furnace or the front zone of the melting furnace) on two sides of the melting part 1, a plurality of second small furnaces 5 are arranged behind the hot spot position 3 (namely the rear zone of the melting furnace or the rear zone of the melting furnace) on two sides of the melting part 1, the first small furnaces 4 and the second small furnaces 5 are both communicated with the melting part 1, a heat storage chamber 7 is communicated with the first small furnaces 4 and the second small furnaces 5, and mixed fuel is mixed and pre-combusted in the first small furnaces 4 and the second small furnaces 5 for heating the material in the melting part 1; 0# oxygen lance 6 is arranged between the feeding port 2 and the first small furnace 4 closest to the feeding port 2 (namely between the feeding port 2 and the first small furnace 4 at the foremost end) at two sides of the melting part 1, and the 0# oxygen lance 6 extends into the melting cavity of the melting part 1.

According to the float glass melting furnace with the 0# oxygen lance, the 0# oxygen lance 6 is arranged between the feeding port 2 and the first small furnace 4 closest to the feeding port 2 on two sides of the melting part 1, so that the temperature of a melting front zone can be increased, the melting process of a mixture is promoted, the melting convection process is enhanced, the melting of glass liquid is more uniform, the distribution of a coloring agent is more uniform, and the defects and the color difference of glass caused by the uneven distribution of the coloring agent are reduced; the space temperature in the front melting zone can be adjusted by adjusting the gas flow introduced into the No. 0 oxygen lance 6, and the melting rate of the mixture in the melting zone and the convection of the feed opening 2 are adjusted, so that the production energy consumption is reduced; the flow of the combustion-supporting gas introduced into the No. 0 oxygen lance 6 is adjusted to adjust the atmosphere in the pre-melting zone to be an oxidizing atmosphere or a reducing atmosphere so as to adapt to the requirements of different colorants on the atmosphere in the melting zone, thereby being beneficial to the coloring stability of the colorants and the improvement of the retention rate of the colorants, leading the produced glass to have uniform and beautiful color and meeting the technical requirements of corresponding colored glass.

Specifically, referring to fig. 1 and 2, two 0# oxygen lances 6 located on both sides of the melting section 1 are oppositely disposed, and the 0# oxygen lances 6 are respectively communicated with a gas source and an oxidant gas source through pipes. Specifically, the gas source is a natural gas supply source and the combustion-supporting gas source is a pure oxygen supply source. The No. 0 oxygen lance 6 is a secondary combustion oxygen lance and comprises a primary oxygen pipeline 61, a secondary oxygen pipeline 62, a natural gas pipeline 63 and an oxygen lance nozzle 64. Wherein, oxygen lance nozzle 64 stretches into the melting chamber of melting part 1, oxygen lance nozzle 64 is of a three-layer concentric circular sleeve structure, one end of primary oxygen pipeline 61 and secondary oxygen pipeline 62 is communicated with a pure oxygen supply source, the other end of primary oxygen pipeline 61 and secondary oxygen pipeline 62 is respectively communicated with one sleeve in oxygen lance nozzle 64, one end of natural gas pipeline 63 is communicated with a natural gas supply source, and the other end of natural gas pipeline 63 is communicated with a third sleeve in oxygen lance nozzle 64. The No. 0 oxygen lance 6 can adopt a secondary combustion oxygen lance with the existing structure.

The utility model discloses a float glass melting furnace with 0# oxygen rifle, when carrying out painted glass production: adding a base glass raw material and a coloring agent into a melting part 1 from a feeding port 2, introducing fuel gas and combustion-supporting gas into a 0# oxygen lance 6 for mixed combustion, spraying combustion flames of the 0# oxygen lances 6 on two sides of the melting part 1 into the melting part 1, heating the glass raw material, and forming two-way opposite combustion of the 0# oxygen lances 6 on two sides of the melting part 1; introducing natural gas and combustion-supporting gas into the first small furnace 4 and the second small furnace 5 for mixing and pre-burning, and spraying generated flame into the melting part 1 to heat the molten glass; the subsequent production flow is consistent with the production flow of the prior float colored glass.

The colorant has very high requirement to the temperature in the melting zone of glass melting in-process and the thermal convection of glass liquid, adopts the utility model discloses a during float glass melting furnace production colored glass, form two to burning through the 0# oxygen rifle 6 of locating 1 both sides of melting portion, compare in the current mode of carrying out regulation and control through adjusting each small stove wind fire volume, the utility model discloses a float glass melting furnace can improve more effectively and melt the prozone temperature, promotes the mixture melting process, strengthens melting the convection current process, can make the glass liquid melt more even, and the colorant distributes more evenly to reduce defect and the glass colour difference because of colorant distributes uneven and produce.

The coloring agent also has very high requirement to the atmosphere of melting zone in the glass melting process, when adopting the utility model to produce the colored glass by the float glass melting furnace, the atmosphere required according to the coloring agent is oxidizing atmosphere or reducing atmosphere, and the forezone atmosphere in the furnace between the feeding port 2 and the hot spot position 3 inside the melting part 1 is oxidizing atmosphere or reducing atmosphere by adjusting the flow of combustion-supporting gas introduced into the 0# oxygen lance 6. The utility model discloses in, can adjust the redox atmosphere that the melting furnace melts the precaution area more conveniently, effectively through adjusting the combustion-supporting air flow who lets in 0# oxygen rifle 6 to adapt to the requirement of different colorants to melting process atmosphere.

Specifically, when the front zone atmosphere of a coloring agent used for coloring glass needs to be an oxidizing atmosphere in the melting process, the flow rate of combustion-supporting gas (such as pure oxygen) introduced into a No. 0 oxygen lance 6 is increased, so that the front zone atmosphere in the melting part 1 between a feeding port 2 and a hot spot position 3 in the kiln is the oxidizing atmosphere; when the atmosphere of the front zone of the coloring agent used for coloring glass needs to be a reducing atmosphere in the melting process, the flow of combustion-supporting gas introduced into a No. 0 oxygen lance 6 is reduced, so that the atmosphere of the front zone in the melting part 1 between a feeding port 2 and a hot spot position 3 in the kiln is the reducing atmosphere. Therefore, the produced colored glass can meet the technical requirements and the color of the colored glass is uniform and beautiful.

When the float glass melting furnace of the utility model is used for producing the colored glass, the temperature of the front area inside the melting part 1 in the furnace between the feed opening 2 and the hot spot position 3 can be adjusted by adjusting the flow of the fuel gas (such as natural gas) introduced into the 0# oxygen lance 6 in the production process. The colorant has high requirement on the temperature of a melting zone in the glass melting process, and the temperature of the melting zone can be conveniently and effectively regulated through the 0# oxygen lance 6, so that the temperature of the melting zone is more in line with the temperature requirement of the colorant.

Adopt the utility model discloses a colored glass is produced to float glass melting furnace, the total quantity of gas of 0# oxygen rifle 6, first small stove 4 and second small stove 5 is less than traditional not install when using 0# oxygen rifle 6 first small stove 4 and the total quantity of gas of second small stove 5. Therefore, the float glass melting furnace can achieve the purpose of reducing energy consumption.

When the float glass melting furnace of the utility model is used for producing the colored glass, the fuel gas is preferably natural gas, and the combustion-supporting gas is preferably pure oxygen. The flow ratio of the fuel gas and the combustion-supporting gas is generally controlled to be 1 (1.8-2.2).

Application example 1:

comparing before and after using the 0# oxygen lance 6 on a certain float glass production line in the carignan, wherein the natural gas used by the 0# oxygen lance 6: the oxygen flow ratio is 1: 2. the colored glass produced by the line needs the atmosphere of a melting zone to be an oxidizing atmosphere, and the oxygen content of smoke gas of a small furnace (a first small furnace) from 1# to 3# in the melting zone is required to be 1-4%, and the oxygen content of smoke gas of a small furnace (a second small furnace) from 4# is required to be 2-5%.

In the utility model, 1# -4# in the 1# -4# small furnace represents the number of the small furnace from the feeding position to the discharging position of the float glass melting furnace, the number of the small furnace closest to the feeding port 2 is 1#, the number of the small furnace immediately behind the 1# small furnace is 2# small furnace, and so on; the 0# oxygen lance in the 0# oxygen lance only indicates that the oxygen lance is positioned in front of the 1# small furnace.

TABLE 1 comparison of the flue gas atmospheres of the front and rear small furnaces of a 0# oxygen lance

As can be seen from Table 1, after using No. 0 oxygen lance 6, the oxygen content in the flue gas atmosphere at the melting front region is increased, the CO content is reduced, the atmosphere is an oxidizing atmosphere, and the requirements for producing the colored glass are met. The time for measuring the smoke data is about 10min for burning of each fire.

Application example 2:

comparing before and after using the 0# oxygen lance 6 on a certain float glass production line in the carignan, wherein the ratio of the natural gas consumption to the oxygen consumption of the 0# oxygen lance 6 is 1: 2. The production line has higher energy consumption, and hopefully, the temperature of a melting front zone can be increased after the 0# oxygen lance 6 is used, the melting reaction of a mixture is promoted, and the heat convection of glass liquid is enhanced, so that the aim of reducing the energy consumption is fulfilled. The following table 2 is a comparison of energy consumption data of 0# oxygen lance 6 for one week before and after use:

TABLE 20# oxygen lance before and after use for one week energy consumption comparison data

The flame of the No. 0 oxygen lance 6 is adjusted to light blue with certain rigidity by adjusting the distribution of primary oxygen and secondary oxygen of the No. 0 oxygen lance 6; the natural gas flow used by the No. 0 oxygen lance 6 is reduced from the No. 1 and No. 2 small furnaces. In the production process, the temperature of the front zone (1# -3# small furnace) in the kiln rises, the material hill moves forward, the condition of reducing the natural gas consumption is met, the total natural gas consumption is reduced until the material hill is restored to the previous position, and the energy consumption is reduced. As shown in Table 2, the energy consumption of the 0# oxygen lance 6 is reduced by 15.61kcal/kg and about 1.1% in one week before and after use. The natural gas metering instrument provider: oil gas, Inc. in Liling.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A float glass melting furnace with a No. 0 oxygen lance comprises a melting part (1), one end of the melting part (1) is provided with a feeding port (2), the melting part (1) is internally provided with a hot spot position (3), a plurality of first small furnaces (4) are arranged between the feeding port (2) and the hot spot position (3) on two sides of the melting part (1), a plurality of second small furnaces (5) are arranged on the two sides of the melting part (1) behind the hot spot position (3), the first small furnace (4) and the second small furnace (5) are communicated with the melting part (1), characterized in that 0# oxygen lances (6) are arranged on both sides of the melting section (1) between the feed opening (2) and the first small furnace (4) closest to the feed opening (2), the No. 0 oxygen lance (6) extends into a melting cavity of the melting part (1).

2. The float glass melting furnace with No. 0 oxygen lance according to claim 1, characterized in that two No. 0 oxygen lances (6) located at both sides of the melting part (1) are oppositely arranged, and the No. 0 oxygen lances (6) are respectively communicated with a gas source and an oxidant gas source through pipes.

3. The float glass melter of claim 2 wherein the fuel gas source is a natural gas supply and the combustion-supporting gas source is a pure oxygen supply.

4. The float glass melting furnace with No. 0 oxygen lance of claim 3, wherein, the No. 0 oxygen lance (6) is a secondary combustion oxygen lance and comprises a primary oxygen pipeline (61), a secondary oxygen pipeline (62), a natural gas pipeline (63) and an oxygen lance nozzle (64), the oxygen lance nozzle (64) extends into the melting part (1), the oxygen lance nozzle (64) is of a three-layer concentric sleeve structure, one end of the primary oxygen pipeline (61) and one end of the secondary oxygen pipeline (62) are communicated with the pure oxygen supply source, the other ends of the primary oxygen pipeline (61) and the secondary oxygen pipeline (62) are respectively communicated with a sleeve in the oxygen lance nozzle (64), one end of the natural gas pipeline (63) is communicated with the natural gas supply source, and the other end of the natural gas pipeline (63) is communicated with a third sleeve in the oxygen lance nozzle (64).

5. The float glass melting furnace with the # 0 oxygen lance of any one of claims 1-4, characterized in that the float glass melting furnace further comprises a regenerator (7), and the regenerator (7) is communicated with the first small furnace (4) and the second small furnace (5).