CN219934679U - Ore heating furnace - Google Patents
Ore heating furnace Download PDFInfo
- Publication number
- CN219934679U CN219934679U CN202320367970.XU CN202320367970U CN219934679U CN 219934679 U CN219934679 U CN 219934679U CN 202320367970 U CN202320367970 U CN 202320367970U CN 219934679 U CN219934679 U CN 219934679U
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- CN
- China
- Prior art keywords
- submerged arc
- arc furnace
- evaporator tube
- evaporator
- tube set
- Prior art date
- 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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Links
- 238000010438 heat treatment Methods 0.000 title description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000002918 waste heat Substances 0.000 claims abstract description 27
- 238000011084 recovery Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 239000003517 fume Substances 0.000 claims abstract description 3
- 238000001704 evaporation Methods 0.000 claims description 29
- 239000000779 smoke Substances 0.000 claims description 28
- 230000008020 evaporation Effects 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 13
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 20
- 239000003546 flue gas Substances 0.000 abstract description 20
- 239000000203 mixture Substances 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000008234 soft water Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model provides a submerged arc furnace, including submerged arc furnace waste heat recovery device, stove outer covering, with stove cover lid and stove cover sealing connection's fume extractor, submerged arc furnace waste heat recovery device is including installing at the inside evaporimeter of stove cover and setting up at the outside deaerator of submerged arc furnace, feed pump, steam drum, circulating water pump, deaerator, feed pump, evaporimeter connect gradually through the pipeline and form first water inlet path, steam drum, circulating water pump, evaporimeter connect gradually through the pipeline and form second water inlet path, the evaporimeter with the steam drum passes through the pipe connection and forms the steam path. The evaporator is arranged in the submerged arc furnace, the utilization of the waste heat generated by the submerged arc furnace can be realized without establishing a preheating boiler and arranging a longer guide flue, and in addition, the evaporator can utilize high-temperature flue gas and radiant heat in the submerged arc furnace, so that the utilization rate of the waste heat generated by the submerged arc furnace is improved.
Description
Technical Field
The utility model relates to metallurgical equipment, in particular to an ore-smelting furnace.
Background
When the submerged arc furnace works, a carbonaceous or magnesia refractory material is used as a furnace lining, a self-culture electrode is used, the electrode is inserted into the furnace burden to perform submerged arc operation, and the energy and the current of an electric arc are utilized to pass through the furnace burden, so that heat energy is generated due to the resistance of the furnace burden to smelt raw materials. Since the temperature of flue gas discharged from the submerged arc furnace is high, a large amount of energy is wasted if the flue gas is directly discharged, thereby causing economic loss.
In the prior art, heat in high-temperature flue gas exhausted by an ore-smelting furnace is recovered by arranging a waste heat boiler independently, steam is generated in the waste heat boiler, and the steam can be used for power generation or material heating and the like for reuse. However, the following technical problems exist in the independent arrangement of the waste heat boiler: the high-temperature flue gas of the submerged arc furnace needs to be led into the waste heat boiler by using a long flue, and the quantity of thermodynamic losses of the portion is larger due to the longer length of the flue, and meanwhile, the waste heat boiler cannot utilize radiant heat in the submerged arc furnace, so that the utilization rate of waste heat generated by the submerged arc furnace is reduced.
Disclosure of Invention
In view of the above, it is necessary to provide an ore furnace capable of recovering waste heat and having a high utilization rate of the waste heat.
The utility model provides a hot stove in ore deposit, includes hot stove waste heat recovery device in ore deposit, stove outer covering, with stove cover lid and stove cover sealing connection's fume extractor, hot stove waste heat recovery device in ore deposit includes the evaporimeter and sets up at the outside deaerator of hot stove, feed pump, steam pocket, circulating water pump, deaerator, feed pump, evaporimeter connect gradually through the pipeline and form first water inlet path, steam pocket, circulating water pump, evaporimeter connect gradually through the pipeline and form the second water inlet path, the evaporimeter is installed in the stove cover, the evaporimeter with the steam pocket passes through pipe connection and forms the steam path.
Preferably, the evaporator comprises a plurality of evaporator tube sets, each evaporator tube set comprising an upper header, a lower header, and a tube bundle connected between the upper header and the lower header; the lower header is connected with a water inlet pipe, and the circulating water pump and the water supply pump are connected with the water inlet pipe; the upper header is provided with an air outlet, and the rising pipe of the steam drum is in sealing connection with the air outlet of the upper header.
Preferably, the tube bundle comprises a plurality of evaporating tubes, the inlet end of each evaporating tube is communicated with the lower header, and the outlet end of each evaporating tube is communicated with the upper header; the joint of the evaporating pipe and the lower header is provided with a reinforcing steel bar head.
Preferably, fins are connected between two adjacent evaporating pipes, and two ends of the fins are respectively connected with the upper header and the lower header.
Preferably, the evaporator comprises a left evaporator tube set, a right evaporator tube set and a middle evaporator tube set connected between the left evaporator tube set and the right evaporator tube set, wherein the upper headers of all the evaporator tube sets are connected end to end through connecting pipes, and the lower headers of all the evaporator tube sets are connected end to end through connecting pipes; the circulating water pump and the feed water pump are connected with the lower headers of the left evaporator tube set and the right evaporator tube set, and the steam drum is connected with the upper headers of the left evaporator tube set and the right evaporator tube set.
Preferably, the left evaporator tube set, the right evaporator tube set and the middle evaporator tube set are connected to form a concave evaporation unit; the number of the evaporation units is one or more.
Preferably, the smoke exhaust device comprises a smoke exhaust upright post, a smoke purification unit and a smoke cooling unit, wherein the smoke cooling unit is connected with the furnace cover, and the smoke purification unit is connected between the smoke exhaust upright post and the smoke cooling unit.
Preferably, an aluminum silicate heat insulation layer is arranged on the inner wall of the furnace shell, and a reflecting plate is arranged on the aluminum silicate heat insulation layer.
In the submerged arc furnace, the deaerator, the water supply pump and the evaporator of the submerged arc furnace waste heat recovery device are sequentially connected through the pipeline to form a first water inlet path, the steam drum, the circulating water pump and the evaporator are sequentially connected through the pipeline to form a second water inlet path, the evaporator is arranged in the furnace cover, and the evaporator is connected with the steam drum through the pipeline to form a steam path, so that radiant heat in the submerged arc furnace is directly absorbed and utilized by the evaporator, the evaporator also can absorb heat of high-temperature flue gas in the submerged arc furnace, the utilization of the waste heat generated by the submerged arc furnace can be realized without establishing a preheating boiler and arranging a longer guide flue, and in addition, the evaporator can utilize the high-temperature flue gas and the radiant heat in the submerged arc furnace, so that the utilization rate of the waste heat generated by the submerged arc furnace is improved.
Drawings
Fig. 1 is a schematic structural view of an ore furnace.
Fig. 2 is a schematic diagram of the structure of the evaporation unit in fig. 1.
Fig. 3 is a schematic view of the structure of the left evaporator tube set in fig. 2.
In the figure: the evaporator 10, the evaporator tube set 11, the left evaporator tube set 11a, the middle evaporator tube set 11b, the right evaporator tube set 11c, the upper header 111, the lower header 112, the evaporation tubes 113, the air outlet 114, the reinforcing bar ends 115, the fins 116, the connection tube 12, the deaerator 20, the feed pump 30, the drum 40, the rising pipe 41, the circulating water pump 50, the water inlet tube 60, the submerged arc furnace 70, the furnace shell 71, the furnace cover 72, the electrode 73, the short net 74, the smoke discharging device 75.
Detailed Description
Referring to fig. 1, the submerged arc furnace 70 comprises a furnace shell 71, a furnace cover 72 covered with the furnace shell 71, a smoke discharging device 75 connected with the furnace cover 72 in a sealing manner, and a submerged arc furnace waste heat recovery device, wherein the submerged arc furnace waste heat recovery device comprises an evaporator 10, a deaerator 20, a water feeding pump 30, a steam drum 40 and a circulating water pump 50 which are arranged outside the submerged arc furnace 70, the deaerator 20, the water feeding pump 30 and the evaporator 10 are sequentially connected through pipelines to form a first water inlet path, the steam drum 40, the circulating water pump 50 and the evaporator 10 are sequentially connected through pipelines to form a second water inlet path, the evaporator 10 is arranged in the furnace cover 72, and the evaporator 10 and the steam drum 40 are sequentially connected through pipelines to form a steam path.
The waste heat recovery device of the submerged arc furnace adopts a forced circulation mode to recover waste heat, and the steam-water flow is as follows: the soft water enters the evaporator 10 through the water feed pump 30 after deoxidizing by the deoxidizer 20, namely a first water inlet path; the temperature in the submerged arc furnace 70 is higher, the water in the evaporator 10 absorbs the heat in the submerged arc furnace 70 to form a steam-water mixture, and the steam-water mixture enters the steam drum 40 through the ascending pipe 41, namely a steam path; the steam-water mixture is separated under the action of the steam-water separation device in the steam drum 40, saturated water enters the evaporator 10 through the circulating water pump 50 to form a second water inlet path, and the saturated water is also a hot water circulating path, and the saturated steam is sent to a chemical plant through a steam outlet for recycling or is sent to steam power generation equipment for power generation.
The saturated water in the steam drum 40 is continuously circulated in the evaporator 10, the heat exchange time is prolonged, the circulation is about 15 times per minute, the flue gas flow rate is 600 ℃ and is 60 ten thousand cubic meters per hour, the set pressure is 1.6MPa, the steam temperature is 200-220 ℃, and the evaporation capacity is 1.7-1.8t/h.
The submerged arc furnace 70 further comprises three electrodes 73 penetrating through the furnace cover 72 and extending into the furnace shell 71, and a short net 74 connected to the electrodes 73, a flue gas flue is formed between the furnace cover 72 and the smoke exhausting device 75, and the evaporator 10 is installed in the furnace cover 72, so that high-temperature flue gas can be effectively recycled and utilized. The bottom of the existing submerged arc furnace 70 is mostly cooled for a long time by adopting a matched cooling tower fan, the built-in evaporator 10 plays a certain role in cooling the temperature in the submerged arc furnace 70 to a certain extent, the shaft power of the cooling tower fan is reduced, the station power of the submerged arc furnace 70 is saved, and the comprehensive power consumption of the submerged arc furnace 70 is reduced.
According to the characteristic of low radiation heat conduction efficiency, in order to improve heat exchange efficiency, an aluminum silicate heat insulation layer is arranged on the inner wall of the furnace shell 71 to insulate heat and preserve heat of the furnace shell 71, so that heat dissipation is reduced, and safety performance is improved. The reflecting plate is arranged on the aluminum silicate heat insulation layer, so that the submerged arc furnace 70 can reflect light and heat radiation during smelting, on one hand, the combustible gas can be fully combusted, and on the other hand, the waste heat can be fully utilized.
After the waste heat recovery of the waste heat recovery device of the submerged arc furnace, the temperature of the flue gas in the submerged arc furnace 70 is still too high although the flue gas is reduced, and the flue gas contains a large amount of dust impurities, so that the environment is polluted to a certain extent. The smoke exhaust apparatus 75 includes a smoke exhaust column, a smoke purifying unit, and a smoke cooling unit, the smoke cooling unit is hermetically connected to the hood 72, and the smoke purifying unit is connected between the smoke exhaust column and the smoke cooling unit. The flue gas cooling unit firstly cools the flue gas, then the flue gas purifying unit performs purification and dust removal, and the flue gas is discharged through the smoke discharging upright post after reaching the discharge standard.
As shown in fig. 2, the evaporator 10 includes a plurality of evaporator tube sets 11, and the plurality of evaporator tube sets 11 are independently disposed, or all the evaporator tube sets 11 are connected in series to form a whole, or several evaporator tube sets 11 may be connected in series to form one evaporation unit, and the number of the evaporation units is one or more. In the present embodiment, the evaporator 10 is composed of three evaporation units, each of which includes a left side evaporator tube group 11a, a middle evaporator tube group 10b, and a right side evaporator tube group 11c, and the three evaporator tube groups 11 are connected to form one evaporation unit in a "concave" shape.
The three evaporator tube sets 11 are substantially similar in structure, taking the left evaporator tube set as an example, and as shown in connection with fig. 3, the left evaporator tube set 11a includes an upper header 111, a lower header 112, and a tube bundle welded between the upper header 111 and the lower header 112; the tube bundle includes a plurality of evaporating tubes 113, each evaporating tube 113 having an inlet end in communication with the lower header 112 and an outlet end in communication with the upper header 111.
The upper header 111 of all the evaporator tube sets 11 are connected end to end through the connecting tube 12, and the lower header 112 of all the evaporator tube sets 11 are connected end to end through the connecting tube 12; wherein, the lower header 112 of the left evaporator tube set 11 and the right evaporator tube set 11 is connected with the water inlet pipe 60, and the circulating water pump 50 and the water feed pump 30 are connected with the water inlet pipe 60; the upper header 111 of the left evaporator tube bank 11 and the right evaporator tube bank 11 is provided with an air outlet hole 114, and the rising pipe 41 of the drum 40 is hermetically connected with the air outlet hole 114 of the upper header 111.
The three evaporator tube sets 11 are horizontally arranged in the furnace cover 72 side by side, the circulating water pump 50 and the water feeding pump 30 are filled with water through the water inlet tube 60 to the lower header 112, and high-temperature flue gas flows from the lower header 112 to the upper header 111, so that water in the lower header 112 becomes a steam-water mixture after absorbing heat, and the steam-water mixture enters the upper header 111 along the evaporation tube 113, then enters the rising tube 41 through the air outlet hole 114, and then enters the steam drum 40.
The connection of the evaporation tube 113 and the lower header 112 is provided with a reinforcing steel bar head 115, and the reinforcing steel bar head 115 arranged on the fire facing surface of the evaporation tube 113 absorbs the heat energy wasted by the submerged arc furnace 70 as much as possible on one hand, and strengthens the connection of the evaporation tube 113 and the lower header 112 on the other hand.
Fins 116 are connected between two adjacent evaporating tubes 113, two ends of the fins 116 are respectively connected with the upper header 111 and the lower header 112, and the fins 116 not only improve heat exchange performance, but also strengthen the connection between the evaporating tubes 113 and the upper header 111 and the lower header 112.
In the above-mentioned submerged arc furnace, the deaerator 20, the water feed pump 30 and the evaporator 10 of the submerged arc furnace waste heat recovery device are sequentially connected through the pipeline to form the first water inlet path, the steam drum 40, the circulating water pump 50 and the evaporator 10 are sequentially connected through the pipeline to form the second water inlet path, the evaporator 10 is installed in the furnace cover 72, the evaporator 10 and the steam drum 40 are connected through the pipeline to form the steam path, so that the radiant heat in the submerged arc furnace 70 is directly absorbed and utilized by the evaporator, the evaporator 10 also can absorb the heat of the high-temperature flue gas in the submerged arc furnace 70, and thus, the utilization of the residual heat generated by the submerged arc furnace 70 can be realized without establishing a preheating boiler and arranging a longer guide flue, in addition, the evaporator 10 can utilize the high-temperature flue gas and the radiant heat in the submerged arc furnace 70, and thus the residual heat utilization rate generated by the submerged arc furnace 70 is improved.
Claims (8)
1. The utility model provides a hot stove in ore deposit, includes the stove outer covering, with stove cap and stove cap sealing connection's fume extractor, its characterized in that, hot stove in ore deposit still includes hot stove waste heat recovery device in ore deposit, hot stove waste heat recovery device in ore deposit is including installing at the inside evaporimeter of stove cap and setting up at the outside deaerator of hot stove in ore deposit, feed pump, drum, circulating water pump, deaerator, feed pump, evaporimeter pass through the pipeline and connect gradually and form first water inlet path, drum, circulating water pump, evaporimeter pass through the pipeline and connect gradually and form second water inlet path, the evaporimeter with the drum passes through the pipeline and connects and form the steam path.
2. The submerged arc furnace of claim 1, wherein: the evaporator comprises a plurality of evaporator tube sets, wherein each evaporator tube set comprises an upper header, a lower header and a tube bundle connected between the upper header and the lower header; the lower header is connected with a water inlet pipe, and the circulating water pump and the water supply pump are connected with the water inlet pipe; the upper header is provided with an air outlet, and the rising pipe of the steam drum is in sealing connection with the air outlet of the upper header.
3. The submerged arc furnace of claim 2, wherein: the tube bundle comprises a plurality of evaporating tubes, the inlet end of each evaporating tube is communicated with the lower header, and the outlet end of each evaporating tube is communicated with the upper header; the joint of the evaporating pipe and the lower header is provided with a reinforcing steel bar head.
4. A submerged arc furnace as claimed in claim 3, wherein: fins are connected between two adjacent evaporating pipes, and two ends of each fin are respectively connected with the upper header and the lower header.
5. The submerged arc furnace of claim 2, wherein: the evaporator comprises a left evaporator tube set, a right evaporator tube set and a middle evaporator tube set connected between the left evaporator tube set and the right evaporator tube set, wherein the upper headers of all the evaporator tube sets are connected end to end through connecting pipes, and the lower headers of all the evaporator tube sets are connected end to end through connecting pipes; the circulating water pump and the feed water pump are connected with the lower headers of the left evaporator tube set and the right evaporator tube set, and the steam drum is connected with the upper headers of the left evaporator tube set and the right evaporator tube set.
6. The submerged arc furnace of claim 5, wherein: the left evaporator tube set, the right evaporator tube set and the middle evaporator tube set are connected to form a concave evaporation unit; the number of the evaporation units is more than one.
7. The submerged arc furnace of claim 1, wherein: the smoke exhaust device comprises a smoke exhaust upright post, a smoke purification unit and a smoke cooling unit, wherein the smoke cooling unit is connected with the furnace cover, and the smoke purification unit is connected between the smoke exhaust upright post and the smoke cooling unit.
8. The submerged arc furnace of claim 1, wherein: the inner wall of the furnace shell is provided with an aluminum silicate heat insulation layer, and the aluminum silicate heat insulation layer is provided with a reflecting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320367970.XU CN219934679U (en) | 2023-03-02 | 2023-03-02 | Ore heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320367970.XU CN219934679U (en) | 2023-03-02 | 2023-03-02 | Ore heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219934679U true CN219934679U (en) | 2023-10-31 |
Family
ID=88488451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320367970.XU Active CN219934679U (en) | 2023-03-02 | 2023-03-02 | Ore heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219934679U (en) |
-
2023
- 2023-03-02 CN CN202320367970.XU patent/CN219934679U/en active Active
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