CN219934633U - Roasting furnace baking device - Google Patents
Roasting furnace baking device Download PDFInfo
- Publication number
- CN219934633U CN219934633U CN202223093699.XU CN202223093699U CN219934633U CN 219934633 U CN219934633 U CN 219934633U CN 202223093699 U CN202223093699 U CN 202223093699U CN 219934633 U CN219934633 U CN 219934633U
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- CN
- China
- Prior art keywords
- pipe
- gas
- natural gas
- diffusing
- roasting furnace
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 164
- 239000003345 natural gas Substances 0.000 claims abstract description 82
- 239000007789 gas Substances 0.000 claims abstract description 72
- 238000005070 sampling Methods 0.000 claims abstract description 19
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 8
- 239000003034 coal gas Substances 0.000 description 7
- 238000001035 drying Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 239000003949 liquefied natural gas Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000002468 ceramisation Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Landscapes
- Feeding And Controlling Fuel (AREA)
Abstract
The utility model discloses a roasting furnace baking device, which comprises a roasting furnace, a gas producer, a starting heat generator, an ignition burner and a main burner, wherein the starting heat generator, the ignition burner and the main burner are arranged on the roasting furnace, and gas pipelines are respectively connected between the gas producer and the starting heat generator, between the gas producer and the ignition burner and between the gas producer and the main burner, and the roasting furnace baking device is characterized in that: the natural gas station is connected with a natural gas main pipe, natural gas branch pipes are connected between the natural gas main pipe and each gas pipeline, a first diffusing pipe is connected to the natural gas main pipe and the natural gas branch pipes, a first sampling pipe is connected to the first diffusing pipe, and valves are arranged on the natural gas main pipe, the natural gas branch pipes, the first diffusing pipe and the first sampling pipe. The utility model can avoid the waste caused by the generation of a large amount of gas discharge.
Description
Technical Field
The utility model relates to the technical field of alumina production, in particular to a roasting furnace baking device.
Background
The roasting of aluminum hydroxide is an important process for producing aluminum oxide, equipment used for roasting is a roasting furnace, and because coal gas is economical and safe in fuel, coal gas is generally used as fuel of the roasting furnace and a corresponding coal gas producer is configured. When the roasting furnace is used for the first time or started in a cold state, the roasting furnace operation is required, and the purpose of the roasting furnace is to ensure the quality and the service life of the lining of the roasting furnace, dry the water content of the lining, and enable the wear-resistant casting material to realize ceramization. When the furnace is baked, the lowest load of the gas producer supplies gas far larger than the gas required by the baking furnace, so that the gas producer is difficult to normally operate or generates a large amount of gas to be discharged, and waste is caused.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model provides a roasting furnace baking device, which avoids waste caused by the generation of a large amount of gas discharge.
The technical scheme adopted by the utility model is as follows: the utility model provides a roasting furnace baking device, including roasting furnace, the gas producer, start-up heat generator, ignition combustor and main burner set up on the roasting furnace, all be connected with the gas pipeline between gas producer and the start-up heat generator, between gas producer and the ignition combustor and between gas producer and the main burner, still include the natural gas station, the natural gas station is connected with the natural gas house steward, all be connected with the natural gas branch pipe between natural gas house steward and each gas pipeline, all be connected with on natural gas house steward and the natural gas branch pipe and blow off pipe one, connect sampling tube one on the blow off pipe one, all set up the valve on natural gas house steward, the natural gas branch pipe, blow off pipe one and the sampling tube one.
As the optimization of this technical scheme, be connected with on the gas pipeline and diffuse the pipe II, diffuse and connect sampling tube II on the pipe II, diffuse and all set up the valve on pipe II and the sampling tube II.
As the optimization of the technical scheme, two diffusing pipes are arranged on the gas pipeline, and the natural gas branch pipe is connected to the gas pipeline between the two diffusing pipes.
Compared with the prior art, the natural gas can be conveyed to the starting heat generator, the ignition burner and the main burner through the natural gas main pipe in the initial furnace drying process, the purpose of using the natural gas for furnace drying is achieved, after the furnace drying is finished, stable switching of the natural gas and the coal gas can be achieved, normal production is not affected, safety and reliability are achieved, the problem of waste coal gas generated in the process of using the coal gas producer for furnace drying can be avoided, and economical efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the connection of the present utility model.
In the figure, 1, a gas pipeline, 2, a natural gas main pipe, 3, a natural gas branch pipe, 4, a first diffusion pipe, 5, a first sampling pipe, 6, a second diffusion pipe, 7, a second sampling pipe, 8, an ignition burner, 9, a starting heat generator, 10 and a main burner.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the utility model provides a roasting furnace drying device, which comprises a roasting furnace, a gas producer, a starting heat generator 9, an ignition burner 8 and a main burner 10, wherein the starting heat generator 9, the ignition burner 8 and the main burner 10 are arranged on the roasting furnace, and gas pipelines 1 are respectively connected between the gas producer and the starting heat generator 9, between the gas producer and the ignition burner 8 and between the gas producer and the main burner 10 and are used for conveying generated gas to the starting heat generator 9, the ignition burner 8 and the main burner 10. The roasting furnace drying device also comprises a natural gas station, wherein the natural gas station is connected with a natural gas main pipe 2, and natural gas branch pipes 3 are connected between the natural gas main pipe 2 and each gas pipeline 1, namely the natural gas main pipe 2 conveys natural gas in the natural gas station to each gas pipeline 1 and finally to a starting heat generator 9, an ignition burner 8 and a main burner 10. The natural gas main pipe 2 and the natural gas branch pipe 3 are connected with a first diffusing pipe 4, the first diffusing pipe 4 is connected with a first sampling pipe 5, and valves are arranged on the natural gas main pipe 2, the natural gas branch pipe 3, the first diffusing pipe 4 and the first sampling pipe 5.
In the concrete implementation of the utility model, each gas pipeline 1 is connected with a second diffusing pipe 6, the second diffusing pipe 6 is connected with a second sampling pipe 7, and valves are arranged on the second diffusing pipe 6 and the second sampling pipe 7. Two diffusing pipes 7 are arranged on the gas pipeline 1, and the natural gas branch pipe 3 is connected to the gas pipeline 1 between the two diffusing pipes 7.
When the utility model is implemented, the natural gas main pipe is a DN150 pipe, the natural gas main pipe is connected to a DN100 pipe of a natural gas branch pipe of the starting heat generator, the natural gas branch pipe is provided with a DN100 regulating valve for controlling the flow of natural gas, three butterfly valves and a glasses valve are used for realizing the control of the temperature rising rate, and a glasses valve and a butterfly valve are arranged on a gas pipeline of the starting heat generator. The natural gas main pipe is connected to a pipe with DN50 as a natural gas branch pipe of the ignition burner, a glasses valve and a butterfly valve are arranged on the natural gas branch pipe, and a glasses valve and a butterfly valve are arranged on a gas pipeline of the ignition burner. The natural gas main pipe is connected with a pipe with DN125 as a natural gas branch pipe of the main burner, and a butterfly valve is arranged on a gas pipeline of the main burner.
Implementation case: 250 ten thousand tons of alumina are produced in one alumina factory every year, and three baking furnaces (yield 2600 t/day/station) and three gas generators (65000 Nm) are arranged correspondingly 3 /h/station, minimum operating load 40000 Nm 3 /h/table). Taking a roasting furnace as an example, a large amount of gas is required to be diffused (the diffusion amount is 32000 and Nm) because of the stable operation of the gas producer 3 Above/h), the baking process of the roasting furnace takes 180 hours, and the gas baking furnace is adopted to totally need 7200000Nm of gas 3 The alumina plant has practiced the present utility model. The liquefied natural gas gasification station is placed in a safe area at the south of the roasting furnace in the aluminum factory, natural gas is fed into the furnace through the movable tank car, and the furnace can be roasted at any time. And when the maximum capacity of the roasting furnace and the condition of insufficient gas supply caused by fluctuation of the gas producer are considered, natural gas mixed combustion is integrated in a main burner gas pipeline. The single furnace needs to be continuously carried out for 180 hours, and the single furnace is divided into 3 stages: (1) first stage: q=412 Nm 3 Per hour, for a total of 87 hours, planned 35844Nm 3 The method comprises the steps of carrying out a first treatment on the surface of the (2) a second stage: q=824 Nm 3 Per h, for a total of 49 hours, planned 40376Nm 3 The method comprises the steps of carrying out a first treatment on the surface of the (3) third stage: q=989 Nm 3 Per hour, for a total of 44 hours, planned 43516Nm 3 . The single furnace of the aluminum factory only needs to prepare 120000Nm for 180 hours 3 The liquefied natural gas is heated to 700 ℃ after the baking, and then the gas is switched, so that the liquefied natural gas can be connected and integrated into a production line. The baking furnace can meet the use requirements of primary baking and cold furnace starting, can realize stable switching of natural gas and coal gas, does not influence normal production, and is safe and reliable. The natural gas oven and gas switching operation flow is as follows:
1. pre-start check
1.1 Checking valves of a natural gas main pipe and a natural gas branch pipe, and ensuring a closed state;
1.2 And (5) checking whether the joints of the natural gas pipelines, the natural gas branch pipe flanges and the valves are leaked or not by using soapy water.
2. Air replacement of a natural gas main pipe and a natural gas branch pipe is carried out according to the principle from the near to the far
2.1 Air displacement of a natural gas main pipe;
2.1.1 Opening a valve of a natural gas main pipe diffusing pipe;
2.1.2 The natural gas station feeds gas, and after about 2 minutes, the valve of the diffusing pipe is closed;
2.1.3 Opening a sampling tube valve, performing natural gas inspection, and repeatedly performing inspection failure according to the steps of 2.1.1 and 2.1.2 until the inspection failure is qualified;
2.2 The gas tightness of the natural gas main pipe valve is detected (after the gas main pipe valve is qualified, each natural gas branch pipe is prepared for air replacement in the next step);
2.3 Air displacement of the natural gas branch pipes;
2.3.1 Gradually opening the diffusing pipe valves of each natural gas branch pipe;
2.3.2 Gradually opening the diffusing pipe valve of each natural gas branch pipe, opening the natural gas main pipe valve, and closing the diffusing pipe valve after about 20 s;
2.3.3 And opening a sampling tube valve, and starting the heat generator at a qualified preparation point. And (5) checking to be unqualified, and repeating the steps of 2.3.1 and 2.3.2 until the product is qualified.
3. Igniting and starting the heat generator according to the operation procedure, and baking according to a baking curve. When the starting heat generator can not meet the heating requirement, the ignition burner is ignited according to the operation procedure.
4. When the furnace top temperature reaches 700 ℃, and the feeding requirement is met, the gas producer is informed to send the gas.
5. Gas pipeline air displacement
5.1 Opening a diffusing pipe valve of each gas pipeline;
5.2 Opening a gas main pipe valve;
5.3 Closing the gas pipeline diffusing pipe valve after about 5 minutes;
5.4 And (3) opening sampling tube valves of the diffusing pipes of the gas pipelines, checking by special personnel, and repeating the steps of 5.1 and 5.2 until the gas is qualified. And after the gas is qualified, gradually opening a gas pipeline valve of the ignition burner, observing the combustion condition of the ignition burner, gradually closing a natural gas branch pipe valve of the ignition burner, and after the gas combustion of the ignition burner is stable, opening a main burner to raise the temperature and throw materials.
6. And after stable feeding combustion, closing a valve for starting the natural gas branch pipe of the heat generator.
7. And (3) completing the natural gas and gas switching process.
8. Main burner mixed combustion
8.1 And opening the natural gas branch pipe valve of the main burner, gradually opening the natural gas branch pipe valve of the main burner, and mixing natural gas into the gas of the main burner.
While the utility model has been described in detail in connection with the specific embodiments thereof, it will be apparent that the embodiments described are only a few, but not all, of the embodiments of the utility model and are not to be considered as limiting the utility model, since numerous modifications and variations will readily suggest themselves to those skilled in the art without departing from the spirit and scope of the utility model.
Claims (3)
1. The utility model provides a roasting furnace baking oven device, includes roasting furnace, gas producer, starts heat generator, ignition combustor and main burner setting on the roasting furnace, all are connected with gas pipeline between gas producer and the start heat generator, between gas producer and the ignition combustor and between gas producer and the main burner, its characterized in that: the natural gas station is connected with a natural gas main pipe, natural gas branch pipes are connected between the natural gas main pipe and each gas pipeline, a first diffusing pipe is connected to the natural gas main pipe and the natural gas branch pipes, a first sampling pipe is connected to the first diffusing pipe, and valves are arranged on the natural gas main pipe, the natural gas branch pipes, the first diffusing pipe and the first sampling pipe.
2. The roaster oven apparatus of claim 1 wherein: and the gas pipeline is connected with a second diffusing pipe, the second diffusing pipe is connected with a second sampling pipe, and valves are arranged on the second diffusing pipe and the second sampling pipe.
3. The roaster oven apparatus of claim 2 wherein: two diffusing pipes are arranged on the gas pipeline, and the natural gas branch pipe is connected to the gas pipeline between the two diffusing pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223093699.XU CN219934633U (en) | 2022-11-16 | 2022-11-16 | Roasting furnace baking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223093699.XU CN219934633U (en) | 2022-11-16 | 2022-11-16 | Roasting furnace baking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219934633U true CN219934633U (en) | 2023-10-31 |
Family
ID=88486878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223093699.XU Active CN219934633U (en) | 2022-11-16 | 2022-11-16 | Roasting furnace baking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219934633U (en) |
-
2022
- 2022-11-16 CN CN202223093699.XU patent/CN219934633U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |