CN110260670A - A kind of control device and its control method of the interior fusing atmosphere of electric smelter furnace - Google Patents
A kind of control device and its control method of the interior fusing atmosphere of electric smelter furnace Download PDFInfo
- Publication number
- CN110260670A CN110260670A CN201910540346.3A CN201910540346A CN110260670A CN 110260670 A CN110260670 A CN 110260670A CN 201910540346 A CN201910540346 A CN 201910540346A CN 110260670 A CN110260670 A CN 110260670A
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- Prior art keywords
- electric smelter
- water
- flue gas
- pipe
- nitrogen
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- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 158
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 79
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 69
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000003546 flue gas Substances 0.000 claims abstract description 41
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000001301 oxygen Substances 0.000 claims abstract description 40
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 40
- 239000000523 sample Substances 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 238000003723 Smelting Methods 0.000 claims abstract description 11
- 238000007689 inspection Methods 0.000 claims abstract description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 47
- 239000007788 liquid Substances 0.000 claims description 30
- 238000012544 monitoring process Methods 0.000 claims description 30
- 238000003860 storage Methods 0.000 claims description 29
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 23
- 239000001569 carbon dioxide Substances 0.000 claims description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 19
- 239000010439 graphite Substances 0.000 claims description 17
- 229910002804 graphite Inorganic materials 0.000 claims description 17
- 238000005259 measurement Methods 0.000 claims description 12
- 239000000498 cooling water Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 229960004424 carbon dioxide Drugs 0.000 claims 8
- 229910002090 carbon oxide Inorganic materials 0.000 claims 1
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000011490 mineral wool Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910001448 ferrous ion Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 241000219112 Cucumis Species 0.000 description 1
- 235000015510 Cucumis melo subsp melo Nutrition 0.000 description 1
- FJJCIZWZNKZHII-UHFFFAOYSA-N [4,6-bis(cyanoamino)-1,3,5-triazin-2-yl]cyanamide Chemical compound N#CNC1=NC(NC#N)=NC(NC#N)=N1 FJJCIZWZNKZHII-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007600 charging Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000007668 thin rolling process Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
- F27D2007/063—Special atmospheres, e.g. high pressure atmospheres
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0068—Regulation involving a measured inflow of a particular gas in the enclosure
Abstract
The present invention discloses a kind of control device of fusing atmosphere in electric smelter furnace, the nitrogen feed unit of nitrogen is filled with including the flue gas inspection unit of flue gas concentration in electric smelter, detection electric smelter, into electric smelter and to being filled with the cooling pipeline water cooling unit of nitrogen.Invention additionally discloses the control methods that atmosphere is melted in a kind of electric smelter furnace, aperture puts into oxygen, carbon dioxide detection probe on electric smelter furnace roof top cover, oxygen, gas concentration lwevel in electric smelter furnace are detected, when detecting that oxygen concentration is more than setting value, nitrogen is sprayed into automatically into electric smelting furnace body, oxygen concentration in furnace is reduced, and then guarantees that electric smelter fusing atmosphere is reducing atmosphere.
Description
Technical field
The invention belongs to electric smelters to produce asbestos product technical field, be related to the control device of fusing atmosphere in electric smelter furnace
And its control method, and in particular to how to control and melt atmosphere in electric smelter furnace, it is made to stabilize to reducing atmosphere, improve rock wool
The performance etc. of product.
Background technique
Fusing atmosphere in electric smelter furnace is reducing atmosphere or oxidizing atmosphere, is set to electric smelting furnace body, production line
Standby and asbestos product performance etc. is crucial.By analysis and flue gas inspection proves, fusing atmosphere is in electric smelter furnace
When reducing atmosphere, graphite electrode must can be effectively protected, graphite electrode is prevented to be oxidized；Electric furnace body can also be protected, is prolonged
Long converter life, save the cost；Contain suitable Fe2+ in rock wool simultaneously, rock wool fibers temperature tolerance and tensile strength etc. can be improved
Performance；It can be reduced the time that electric smelter puts molten iron again, it is easy to operate.
Summary of the invention
The purpose of the invention is to control in electric smelter furnace to melt atmosphere, so that it is melted atmosphere and stabilize to reproducibility gas
Atmosphere.
The present invention controls the principle of fusing atmosphere in electric smelter furnace
Due to the chemical inertness of nitrogen, it is commonly used for protective gas, such as: melon and fruit, food, light bulb fill gas.To prevent certain objects
Body is aoxidized when being exposed to air by oxygen, fills silo with nitrogen, grain can be made not go rotten, not germinate, long-term preservation.In chemical industry
Industry, nitrogen are mainly used as protective gas, substitution gas, washing gas, safety guarantee gas.Add as aluminum products, aluminum profile
Work, the protective gas such as thin rolling of aluminium.
Because the chemical property torpescence of nitrogen, is difficult to chemically react with other materials, therefore into electric smelting furnace body
It is filled with nitrogen and reduces the entrance of oxygen in electric furnace as protective gas, while reducing the oxidation in furnace to ferrous ion.
The specific technical solution that the present invention uses is:
A kind of control device of the interior fusing atmosphere of electric smelter furnace, including electric smelter, detect the cigarette of flue gas concentration in electric smelter
Gas detection unit, the nitrogen feed unit that nitrogen is filled with into electric smelter and to being filled with the cooling pipeline water cooling unit of nitrogen,
Three hollow graphite electrodes are set on the furnace roof top cover of electric smelter, are arranged coaxially in every hollow graphite electrode
The company of fixed outer tube is arranged in the cooling-water duct being made of inner and outer tubes between the outer wall and hollow graphite electrode inner wall of outer tube
Bracket is connect, the both ends of inner and outer tubes are connected by annular endplate；Outer wall of inner tube, outer tube wall and two annular endplates it
Between surround cooling-water duct；Two water pipe heads are set on the annular endplate of cooling-water duct one end；
Flue gas inspection unit includes detecting the oxygen measurement probe of oxygen concentration in electric smelter, titanium dioxide in detection electric smelter
The carbon dioxide detection probe and flue gas monitoring analyzer of concentration of carbon, flue gas monitoring analyzer are placed in except electric smelter, oxygen inspection
Probing head is fixed by the bracket on the furnace roof top cover of electric smelter and in the burner hearth that oxygen measurement probe protrudes into electric smelter, oxygen inspection
Probing head signal end accesses flue gas monitoring analyzer；Carbon dioxide detection probe is fixed by the bracket the furnace roof top cover in electric smelter
Upper and carbon dioxide detection probe protrudes into the burner hearth of electric smelter, the signal end access flue gas monitoring point of carbon dioxide detection probe
Analyzer；
Nitrogen feed unit includes nitrogen compressor, liquid nitrogen storage tank and flowmeter processed, and nitrogen compressor and liquid nitrogen storage tank processed are placed in
Except electric smelter, the electrically operated valve in liquid nitrogen storage tank is electrically connected flue gas monitoring analyzer；The output of nitrogen compressor processed passes through pipeline
The input of liquid nitrogen storage tank is connected, the output of liquid nitrogen storage tank connects total inlet pipe road, and total inlet pipe road is connect respectively by four-way connection
Three branches enter pipeline out, and three branches enter pipeline and are inserted into three hollow graphite electrodes respectively；Flowmeter is mounted on always
On admission line；
Pipeline water cooling unit includes water tank, water pump, water supplying pipe, return pipe and water supply valve, and water tank is placed in electricity
Except smelting furnace, water pump is placed in by water tank, and exit of pump connects water supplying pipe one end, and the water supplying pipe other end connects a water pipe and connects
Head, return pipe one end connect another water pipe head, and the return pipe other end protrudes into water tank, and water supply valve is arranged in water supplying pipe
On.
To the preferred of technical solution of the present invention, the center of hollow graphite electrode is arranged the double-deck heat resisting steel pipeline, and nitrogen is from inner
It is passed through in layer steel pipe, the double-deck heat resisting steel pipeline is located at the inside of inner tube.
To the preferred of technical solution of the present invention, backwater valve is set on return pipe.
The control method of fusing atmosphere, includes the following steps: in electric smelter furnace
Step 1) sets the oxygen concentration and carbon dioxide setting value in flue gas monitoring analyzer；
Step 2) when shown in flue gas monitoring analyzer oxygen concentration that oxygen measurement probe detects be more than setting value and
Or the gas concentration lwevel that carbon dioxide detection probe detects is more than setting value, electricity of the flue gas monitoring analyzer to liquid nitrogen storage tank
Movable valve issues the signal opened；
Step 3) starts water pump, opens the water supply valve on water supplying pipe and opens the backwater valve on return pipe；
Electrically operated valve in step 4) liquid nitrogen storage tank is opened, and the nitrogen in liquid nitrogen storage tank is filled in electric smelting furnace body, is filled with
A period of time nitrogen；
Step 5) is when showing that oxygen concentration that oxygen measurement probe detects is equal to or less than set in flue gas monitoring analyzer
The gas concentration lwevel that definite value and carbon dioxide detection probe detect is equal to or less than setting value, and flue gas monitoring analyzer is to liquid
The electrically operated valve of nitrogen storage tank issues the signal closed；
Electrically operated valve in step 6) liquid nitrogen storage tank is closed, and nitrogen stopping is filled with；
Step 7) switches off the pump, and closes the water supply valve on water supplying pipe and closes the backwater valve on return pipe.
Compared with prior art, the present invention the beneficial effect is that:
The present invention reduces the entrance of oxygen in electric furnace as protective gas to nitrogen is filled in electric smelter, while reducing furnace
The interior oxidation to ferrous ion guarantees that electric smelter fusing atmosphere is reducing atmosphere；Simultaneously using water cooling to the nitrogen being filled with into
Row cooling, is effectively prevented high temperature nitrogen damage caused by electric smelter.
Detailed description of the invention
Fig. 1 is the functional block diagram of the control device of fusing atmosphere in electric smelter furnace.
Fig. 2 is the aperture layout drawing of electric smelter furnace roof top cover.
Specific embodiment
Technical solution of the present invention is described in detail below, but protection scope of the present invention is not limited to the implementation
Example.
To keep the contents of the present invention more obvious and easy to understand, done further below in conjunction with attached drawing 1- Fig. 2 and specific embodiment
Description.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Embodiment:
As shown in Figure 1, the control device of atmosphere, including electric smelter are melted in a kind of electric smelter furnace of the present embodiment, detection electricity
The flue gas inspection unit of flue gas concentration in smelting furnace, the nitrogen feed unit that nitrogen is filled with into electric smelter and cooling to nitrogen is filled with
Pipeline water cooling unit.
As shown in Fig. 2, three hollow graphite electrodes are arranged on the furnace roof top cover of electric smelter, in every hollow graphite electrode
The coaxial cooling-water duct 1 being made of inner and outer tubes is set, is arranged between the outer wall and hollow graphite electrode inner wall of outer tube
The connecting bracket of fixed outer tube, the both ends of inner and outer tubes are connected by annular endplate；Outer wall of inner tube, outer tube wall and two
Cooling-water duct is surrounded between a annular endplate；Two water pipe heads are set on the annular endplate of cooling-water duct one end.
Flue gas inspection unit includes detecting the oxygen measurement probe of oxygen concentration in electric smelter, titanium dioxide in detection electric smelter
The carbon dioxide detection probe and flue gas monitoring analyzer of concentration of carbon, flue gas monitoring analyzer are placed in except electric smelter, oxygen inspection
Probing head is fixed by the bracket on the furnace roof top cover of electric smelter and in the burner hearth that oxygen measurement probe protrudes into electric smelter, oxygen inspection
Probing head signal end accesses flue gas monitoring analyzer；Carbon dioxide detection probe is fixed by the bracket the furnace roof top cover in electric smelter
Upper and carbon dioxide detection probe protrudes into the burner hearth of electric smelter, the signal end access flue gas monitoring point of carbon dioxide detection probe
Analyzer；
Nitrogen feed unit includes nitrogen compressor, liquid nitrogen storage tank and flowmeter processed, and nitrogen compressor and liquid nitrogen storage tank processed are placed in
Except electric smelter, the electrically operated valve in liquid nitrogen storage tank is electrically connected flue gas monitoring analyzer；The output of nitrogen compressor processed passes through pipeline
The input of liquid nitrogen storage tank is connected, the output of liquid nitrogen storage tank connects total inlet pipe road, and total inlet pipe road is connect respectively by four-way connection
Three branches enter pipeline out, and three branches enter pipeline and are inserted into three hollow graphite electrodes respectively；Flowmeter is mounted on always
On admission line；
Pipeline water cooling unit includes water tank, water pump, water supplying pipe, return pipe and water supply valve, and water tank is placed in electricity
Except smelting furnace, water pump is placed in water tank, and exit of pump connects water supplying pipe one end, and the water supplying pipe other end connects a water pipe and connects
Head, return pipe one end connect another water pipe head, and the return pipe other end protrudes into water tank, and water supply valve is arranged in water supplying pipe
On, backwater valve is set on return pipe.
As shown in Figure 1, the double-deck heat resisting steel pipeline is arranged in the center of hollow graphite electrode, nitrogen is passed through out of inner layer steel pipe,
The double-deck heat resisting steel pipeline is located at the inside of inner tube.Cold water in being filled with nitrogen procedure in cooling-water duct 1 is to the nitrogen being filled with
It is cooled down, prevents nitrogen from damaging to electric smelter.
As shown in Fig. 2, aperture puts into the peace of oxygen detection spy, carbon dioxide detection probe on electric smelter furnace roof top cover
Dress, 3, oxygen, gas concentration lwevel in electric smelter furnace are detected；Multiple chargings are opened up on electric smelter furnace roof top cover simultaneously
Hole 2.
The control method of fusing atmosphere, includes the following steps: in electric smelter furnace
Step 1) sets the oxygen concentration and carbon dioxide setting value in flue gas monitoring analyzer；
Step 2) when shown in flue gas monitoring analyzer oxygen concentration that oxygen measurement probe detects be more than setting value and
Or the gas concentration lwevel that carbon dioxide detection probe detects is more than setting value, electricity of the flue gas monitoring analyzer to liquid nitrogen storage tank
Movable valve issues the signal opened；
Step 3) starts water pump, opens the water supply valve on water supplying pipe and opens the backwater valve on return pipe；
Electrically operated valve in step 4) liquid nitrogen storage tank is opened, and the nitrogen in liquid nitrogen storage tank is filled in electric smelting furnace body, is filled with
A period of time nitrogen；
Step 5) is when showing that oxygen concentration that oxygen measurement probe detects is equal to or less than set in flue gas monitoring analyzer
The gas concentration lwevel that definite value and carbon dioxide detection probe detect is equal to or less than setting value, and flue gas monitoring analyzer is to liquid
The electrically operated valve of nitrogen storage tank issues the signal closed；
Electrically operated valve in step 6) liquid nitrogen storage tank is closed, and nitrogen stopping is filled with；
Step 7) switches off the pump, and closes the water supply valve on water supplying pipe and closes the backwater valve on return pipe.
The control method of fusing atmosphere in electric smelter furnace as shown in Figure 1, when detect oxygen concentration be more than setting value and/or
When gas concentration lwevel is more than setting value, nitrogen is sprayed into automatically into electric smelting furnace body, makes oxygen concentration and carbon dioxide in furnace
Concentration reduces, and then guarantees that electric smelter fusing atmosphere is reducing atmosphere.
As described above, must not be explained although the present invention has been indicated and described referring to specific preferred embodiment
For the limitation to invention itself.It without prejudice to the spirit and scope of the invention as defined in the appended claims, can be right
Various changes can be made in the form and details for it.
Claims (4)
1. the control device of fusing atmosphere in a kind of electric smelter furnace, including electric smelter, which is characterized in that further include detection electric smelter
The flue gas inspection unit of interior flue gas concentration, the nitrogen feed unit that nitrogen is filled with into electric smelter and to being filled with the cooling pipe of nitrogen
Road water cooling unit,
Three hollow graphite electrodes are set on the furnace roof top cover of electric smelter, are arranged in every hollow graphite electrode coaxial by interior
The connection branch of fixed outer tube is arranged in the cooling-water duct that pipe and outer tube are constituted between the outer wall and hollow graphite electrode inner wall of outer tube
Frame, the both ends of inner and outer tubes are connected by annular endplate；It is enclosed between outer wall of inner tube, outer tube wall and two annular endplates
At cooling-water duct；Two water pipe heads are set on the annular endplate of cooling-water duct one end；
Flue gas inspection unit includes the oxygen measurement probe of oxygen concentration in detection electric smelter, carbon dioxide is dense in detection electric smelter
The carbon dioxide detection probe and flue gas monitoring analyzer of degree, flue gas monitoring analyzer are placed in except electric smelter, and oxygen detection is visited
Head is fixed by the bracket on the furnace roof top cover of electric smelter and in the burner hearth that oxygen measurement probe protrudes into electric smelter, and oxygen detection is visited
Head signal end accesses flue gas monitoring analyzer；Carbon dioxide detection probe be fixed by the bracket on the furnace roof top cover of electric smelter and
Carbon dioxide detection probe protrudes into the burner hearth of electric smelter, the signal end access flue gas monitoring analysis of carbon dioxide detection probe
Instrument；
Nitrogen feed unit includes nitrogen compressor, liquid nitrogen storage tank and flowmeter processed, and nitrogen compressor and liquid nitrogen storage tank processed are placed in electric smelting
Except furnace, the electrically operated valve in liquid nitrogen storage tank is electrically connected flue gas monitoring analyzer；The output of nitrogen compressor processed is connected by pipeline
The input of liquid nitrogen storage tank, the output of liquid nitrogen storage tank connect total inlet pipe road, and total inlet pipe road picks out three by four-way connection respectively
Root branch enters pipeline, and three branches enter pipeline and are inserted into three hollow graphite electrodes respectively；Flowmeter is mounted on total air inlet
On pipeline；
Pipeline water cooling unit includes water tank, water pump, water supplying pipe, return pipe and water supply valve, and water tank is placed in electric smelter
Except, water pump is placed in by water tank, and exit of pump connects water supplying pipe one end, and the water supplying pipe other end connects a water pipe head,
Return pipe one end connects another water pipe head, and the return pipe other end protrudes into water tank, and water supply valve is arranged on water supplying pipe.
2. the apparatus according to claim 1, which is characterized in that the double-deck heat resisting pipe is arranged in the center of hollow graphite electrode
Road, nitrogen are passed through out of inner layer steel pipe, and the double-deck heat resisting steel pipeline is located at the inside of inner tube.
3. the apparatus according to claim 1, which is characterized in that backwater valve is arranged on return pipe.
4. proposing the control method of fusing atmosphere in electric smelter furnace using device described in claim 1-3, which is characterized in that packet
Include following steps:
Step 1) sets the oxygen concentration and carbon dioxide setting value in flue gas monitoring analyzer；
Step 2) is when showing that oxygen concentration that oxygen measurement probe detects is more than setting value and/or two in flue gas monitoring analyzer
The gas concentration lwevel that carbonoxide detection probe detects is more than setting value, motor-driven valve of the flue gas monitoring analyzer to liquid nitrogen storage tank
Door issues the signal opened；
Step 3) starts water pump, opens the water supply valve on water supplying pipe and opens the backwater valve on return pipe；
Electrically operated valve in step 4) liquid nitrogen storage tank is opened, and the nitrogen in liquid nitrogen storage tank is filled in electric smelting furnace body, is filled with one section
Time nitrogen；
Step 5) is when showing that oxygen concentration that oxygen measurement probe detects is equal to or less than setting value in flue gas monitoring analyzer
The gas concentration lwevel detected with carbon dioxide detection probe is equal to or less than setting value, and flue gas monitoring analyzer is stored up to liquid nitrogen
The electrically operated valve of tank issues the signal closed；
Electrically operated valve in step 6) liquid nitrogen storage tank is closed, and nitrogen stopping is filled with；
Step 7) switches off the pump, and closes the water supply valve on water supplying pipe and closes the backwater valve on return pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910540346.3A CN110260670B (en) | 2019-06-21 | 2019-06-21 | Control device and control method for melting atmosphere in electric melting furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910540346.3A CN110260670B (en) | 2019-06-21 | 2019-06-21 | Control device and control method for melting atmosphere in electric melting furnace |
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| CN110260670A true CN110260670A (en) | 2019-09-20 |
| CN110260670B CN110260670B (en) | 2024-03-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112479560A (en) * | 2020-12-24 | 2021-03-12 | 连云港福东正佑照明电器有限公司 | Preparation method of radiation-resistant anti-crystallization high-transmittance quartz tube for ultra-high-power light source |
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