CN219368357U - Oxygen-enriched roasting elastic production adjusting device of fluidized roasting furnace - Google Patents
Oxygen-enriched roasting elastic production adjusting device of fluidized roasting furnace Download PDFInfo
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- CN219368357U CN219368357U CN202320257626.5U CN202320257626U CN219368357U CN 219368357 U CN219368357 U CN 219368357U CN 202320257626 U CN202320257626 U CN 202320257626U CN 219368357 U CN219368357 U CN 219368357U
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Abstract
The utility model discloses a fluidized roasting furnaceThe oxygen roasting elastic production regulating device comprises a stainless steel oxygen delivery pipeline, wherein an oxygen pressure sensor, a first-stage pressure reducing valve, a manual stop valve I, an electric quick stop valve, an air filter, an oxygen flowmeter, a manual stop valve II, an electric flow regulating valve, a manual stop valve III, a second-stage pressure reducing valve and a check valve are sequentially arranged on the stainless steel oxygen delivery pipeline along the gas flow direction; the inlet end of the stainless steel oxygen therapy pipeline is connected with an oxygen generation station; an oxygen mixer is arranged on an outlet pipeline of a furnace front fan of the roasting furnace, and the outlet end of the stainless steel oxygen therapy pipeline is connected with the oxygen mixer. The utility model can enable the fluidization roasting furnace to have the capability of elastic production, can be beneficial to solving the problems of insufficient productivity and poor product quality caused by oxygen deficiency in a plateau area, can reduce the flue gas quantity of the roasting furnace and improve SO in the flue gas 2 Thereby leading the zinc smelting acid making system to have the condition of high concentration acid making process operation and effectively reducing the power consumption of the acid making system.
Description
Technical Field
The utility model relates to the technical field of the strengthening production of fluidized roasting furnaces in the zinc smelting industry and the nonferrous metal industry, in particular to an oxygen-enriched roasting elastic production adjusting device of a fluidized roasting furnace.
Background
At present, the fluidized bed roasting technology is mature, and the fluidized bed roasting furnace strengthening production is generally realized by methods of large-scale roasting, oxygen-enriched roasting, granulating roasting, secondary air roasting, high-temperature acidification roasting, bottomless multilayer fluidized bed roasting and the like.
The oxygen-enriched roasting not only ensures that the obtained roasted ore meets the requirements on sulfur and soluble zinc content, but also can greatly improve the productivity of the furnace and the actual yield of zinc. Production practice shows that when oxygen-enriched air containing 20-30% of oxygen is used, the production rate of the furnace is improved by 50% at the roasting temperature of 900-940 ℃. The productivity is improved by 70 percent at 970 ℃, the content of soluble zinc is improved by 3 percent, and the SO content of furnace gas is improved 2 The concentration is improved by 3 percent, and the yield of furnace gas is reduced. In addition, by using oxygen-enriched air roasting, 1.2t of steam can be obtained per 1t of zinc sulfide concentrate produced. But in the plateau area, the fluidized roasting furnace production process facesThe method has the advantages of being anoxic in the plateau, low in bed energy rate, high in total sulfur and residual sulfur in calcine, low in residual oxygen in flue gas, and capable of affecting the acid making conversion rate.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide an oxygen-enriched roasting elastic production adjusting device of a fluidized roasting furnace.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
an oxygen-enriched roasting elastic production regulating device of a fluidized roasting furnace comprises a stainless steel oxygen-conveying pipeline, wherein an oxygen pressure sensor, a first-stage pressure reducing valve, a first manual stop valve, an electric quick stop valve, an air filter, an oxygen flowmeter, a second manual stop valve, an electric flow regulating valve, a third manual stop valve, a second-stage pressure reducing valve and a check valve are sequentially arranged on the stainless steel oxygen-conveying pipeline along the gas flow direction; the inlet end of the stainless steel oxygen therapy pipeline is connected with an oxygen generation station; an oxygen mixer is arranged on an outlet pipeline of a furnace front fan of the roasting furnace, and the outlet end of the stainless steel oxygen therapy pipeline is connected with the oxygen mixer.
Further, the elastic production adjusting device further comprises an oxygen blow-down pipe, one end of the oxygen blow-down pipe is communicated with a part, located between the electric quick cut-off valve and the air filter, of the stainless steel oxygen delivery pipeline, and a manual emptying stop valve is further arranged on the oxygen blow-down pipe.
Further, the elastic production adjusting device further comprises a compressed air blowing pipeline, and a manual blowing stop valve and a blowing check valve are sequentially arranged on the compressed air blowing pipeline along the flowing direction of the compressed air; the inlet end of the compressed air blowing pipeline is communicated with the air compressor, the outlet end of the compressed air blowing pipeline is connected with two branch pipes, one branch pipe is communicated with the part, located between the manual stop valve III and the secondary pressure reducing valve, on the stainless steel oxygen delivery pipeline, and the other branch pipe is communicated with the part, located between the oxygen flowmeter and the manual stop valve II, on the stainless steel oxygen delivery pipeline through the manual stop valve IV.
The utility model has the beneficial effects that: conventional air blowing using the apparatus of the present utility model in combination with existing centrifugal blowersThe device and the furnace bottom bellows hood system of the roasting furnace can enable the production system to have the production regulation functions of conventional air roasting, micro oxygen-enriched air roasting and oxygen-enriched air roasting, improve the bed energy rate and the production single capacity of the fluidized roasting furnace, thereby completing the increase of the productivity when the market condition of nonferrous metal products is good, reducing the production load when the market condition of the nonferrous metal products is low, enabling the fluidized roasting furnace to have the capacity of elastic production, being beneficial to solving the problems of insufficient productivity and poor product quality of the production system in a plateau area due to oxygen deficiency, and reducing the flue gas amount of the roasting furnace through the oxygen-enriched roasting of the roasting furnace, thereby reducing SO in the flue gas 2 The gas concentration is improved from 7-8% to 9-10%, so that the zinc smelting acid making system has the operating condition of the high concentration acid making process and the power consumption of the acid making system is effectively reduced.
Drawings
FIG. 1 is a schematic diagram of a device for regulating the oxygen-enriched roasting elastic production of a fluidized bed roaster in an embodiment of the utility model;
FIG. 2 is a schematic diagram of an oxygen mixer according to an embodiment of the present utility model.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings, and it should be noted that, while the present embodiment provides a detailed implementation and a specific operation process on the premise of the present technical solution, the protection scope of the present utility model is not limited to the present embodiment.
The embodiment provides an oxygen-enriched roasting elastic production regulating device of a fluidized roasting furnace, which comprises a stainless steel oxygen delivery pipeline 12, wherein an oxygen pressure sensor 1, a primary pressure reducing valve 2, a manual stop valve I3, an electric quick stop valve 4, an air filter 5, an oxygen flowmeter 6, a manual stop valve II 7, an electric flow regulating valve 8, a manual stop valve III 9, a secondary pressure reducing valve 10 and a check valve 11 are sequentially arranged on the stainless steel oxygen delivery pipeline 12 along the gas flow direction, as shown in figures 1-2; the inlet end of the stainless steel oxygen therapy pipeline 12 is connected with an oxygen generation station; the outlet pipeline of the furnace front fan of the roasting furnace is provided with an oxygen mixer 14, and the outlet end of the stainless steel oxygen therapy pipeline 12 is connected with the oxygen mixer. As shown in fig. 2, the oxygen mixer 14 is externally connected with an oxygen inlet pipe and is connected with the outlet end of the stainless steel oxygen delivery pipe 12 through a flange interface 141.
In this embodiment, the oxygen-enriched roasting elastic production adjusting device of the fluidized roasting furnace further comprises an oxygen-exhausting pipe 15, one end of the oxygen-exhausting pipe 15 is communicated with a portion, located between the electric quick cut-off valve 4 and the air filter 5, of the stainless steel oxygen delivery pipeline 12, and a manual emptying cut-off valve 13 is further arranged on the oxygen-exhausting pipe 15. The oxygen blow-off pipe and the manual exhaust stop valve are mainly used for exhausting residual oxygen in the pipeline in an emergency mode when the oxygen is initially supplied or the oxygen is emergently stopped in a later period.
In this embodiment, the oxygen-enriched roasting elastic production adjusting device of the fluidized roasting furnace further comprises a compressed air blowing pipe 16, and a manual purge stop valve 18 and a purge check valve 19 are sequentially arranged on the compressed air blowing pipe 16 along the flow direction of compressed air; the inlet end of the compressed air blowing pipe 16 is communicated with a compressed air source (such as an air compressor, a compressed air storage tank and the like), the outlet end of the compressed air blowing pipe is connected with two branch pipes, one branch pipe is communicated with the part of the stainless steel oxygen delivery pipe 12 between the manual stop valve III 9 and the secondary pressure reducing valve 10, and the other branch pipe is communicated with the part of the stainless steel oxygen delivery pipe 12 between the oxygen flowmeter 6 and the manual stop valve II 7 through the manual stop valve IV 17.
It should be noted that, because oxygen is a combustion improver, purging must be performed before and after the oxygen line is used. Before purging, each pressure reducing valve is required to be disassembled, each manual stop valve, an electric quick stop valve, a manual purging stop valve, an electric flow regulating valve and the like are opened, an oxygen pressure gauge and an oxygen flow meter are closed, then a compressed air source is opened, and compressed air enters a stainless steel oxygen therapy pipeline from a compressed air blowing pipeline for purging.
In practical application, can also further provide the overgrate air through oil gun or natural gas gun burning oven system and cooperate above-mentioned device and carry out intensive production, can also increase the disc granulator on zinc concentrate belt conveyor system, carry out intensive production through pelletization calcination cooperation, in addition, can also carry out intensive production in cooperation through mixing in zinc oxide ore, lead slag flotation zinc concentrate's low sulfur ore etc..
The device is divided into three operations of oxygen feeding operation, oxygen stopping operation and oxygen pipeline purging.
Oxygen feeding operation: and opening a first manual stop valve 3, a second manual stop valve 7 and a third manual stop valve 9, and enabling surplus pure oxygen in the oxygen production station to enter an oxygen mixer and air for mixing and then enter a roasting furnace. The electric quick cut-off valve 4 and the electric flow regulating valve 8 can control the oxygen flow, so as to regulate the mixed oxygen flow and control the oxygen concentration of the air entering the roasting furnace to realize the three process operations of conventional blast, micro oxygen-enriched roasting and oxygen-enriched roasting of the fluidized roasting furnace. By means of the oxygen pressure sensor 1 and the oxygen flow meter 6, monitoring of the oxygen pressure and the oxygen flow can be achieved. Pure oxygen can be filtered through the air filter 5 to improve the cleanliness of the oxygen.
Oxygen stopping operation: the oxygen is evacuated by opening the manual evacuation shutoff valve 13, and then the electric flow rate adjustment valve 8 is closed. Before the furnace is shut down, oxygen must be shut down, and the emergency of the furnace shutdown operation is executed after conventional blast. In emergency, the manual emptying stop valve 13 can be opened to empty, then the oxygen generation station is informed of stopping oxygen, and the electric quick stop valve 4 is closed.
Conventional blasting operation refers to a single operation using only a centrifugal blower alone by closing the oxygen-enriched roasting line.
The device is combined with the conventional air blowing device of the conventional centrifugal blower and the furnace bottom bellows hood system of the roasting furnace, so that the production system has the production regulation functions of conventional air roasting, micro oxygen-enriched air roasting and oxygen-enriched air roasting, and the bed energy rate of the fluidized roasting furnace is changed from 5 t/(m) 2 D) up to 6-8 t/(m) 2 D) the production single capacity is improved by 20-60%, the flue gas amount of the roasting furnace is reduced by 10-20%, and SO in the flue gas at the inlet of the acid making system 2 The concentration is increased from 6-8% to 9-10%, the ton acid power consumption of the acid making system is reduced from 130-150kwh/t-100% sulfuric acid to 110-120kwh/t-100% sulfuric acid or even lower, thereby finishing 2 when the market conditions of nonferrous metal products are betterThe productivity is increased by 0-60%, and the production load can be reduced by 0-20% when the market of nonferrous metal products is low. The fluidized roasting furnace has the elastic production capacity, and can be beneficial to solving the problems of insufficient productivity and poor yield quality of a production system in a plateau area due to oxygen deficiency.
Various modifications and variations of the present utility model will be apparent to those skilled in the art in light of the foregoing teachings and are intended to be included within the scope of the following claims.
Claims (3)
1. The oxygen-enriched roasting elastic production regulating device for the fluidized roasting furnace is characterized by comprising a stainless steel oxygen delivery pipeline, wherein an oxygen pressure sensor, a first-stage pressure reducing valve, a manual stop valve I, an electric quick stop valve, an air filter, an oxygen flowmeter, a manual stop valve II, an electric flow regulating valve, a manual stop valve III, a second-stage pressure reducing valve and a check valve are sequentially arranged on the stainless steel oxygen delivery pipeline along the gas flow direction; the inlet end of the stainless steel oxygen therapy pipeline is connected with an oxygen generation station; an oxygen mixer is arranged on an outlet pipeline of a furnace front fan of the roasting furnace, and the outlet end of the stainless steel oxygen therapy pipeline is connected with the oxygen mixer.
2. The device for adjusting the oxygen-enriched roasting elastic production of the fluidized roasting furnace according to claim 1, further comprising an oxygen-discharging pipe, wherein one end of the oxygen-discharging pipe is communicated with a part of the stainless steel oxygen delivery pipeline, which is positioned between the electric quick shut-off valve and the air filter, and the oxygen-discharging pipe is further provided with a manual emptying shut-off valve.
3. The device for adjusting the elastic production of the oxygen-enriched roasting of the fluidized roasting furnace according to claim 1, further comprising a compressed air blowing pipeline, wherein a manual blowing stop valve and a blowing check valve are sequentially arranged on the compressed air blowing pipeline along the flow direction of the compressed air; the inlet end of the compressed air blowing pipeline is communicated with the air compressor, the outlet end of the compressed air blowing pipeline is connected with two branch pipes, one branch pipe is communicated with the part, located between the manual stop valve III and the secondary pressure reducing valve, on the stainless steel oxygen delivery pipeline, and the other branch pipe is communicated with the part, located between the oxygen flowmeter and the manual stop valve II, on the stainless steel oxygen delivery pipeline through the manual stop valve IV.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320257626.5U CN219368357U (en) | 2023-02-20 | 2023-02-20 | Oxygen-enriched roasting elastic production adjusting device of fluidized roasting furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320257626.5U CN219368357U (en) | 2023-02-20 | 2023-02-20 | Oxygen-enriched roasting elastic production adjusting device of fluidized roasting furnace |
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| CN219368357U true CN219368357U (en) | 2023-07-18 |
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| CN202320257626.5U Active CN219368357U (en) | 2023-02-20 | 2023-02-20 | Oxygen-enriched roasting elastic production adjusting device of fluidized roasting furnace |
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