CN113803990B - Method for treating vanadium extraction rotary kiln flue gas by using burner - Google Patents
Method for treating vanadium extraction rotary kiln flue gas by using burner Download PDFInfo
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- CN113803990B CN113803990B CN202111124437.2A CN202111124437A CN113803990B CN 113803990 B CN113803990 B CN 113803990B CN 202111124437 A CN202111124437 A CN 202111124437A CN 113803990 B CN113803990 B CN 113803990B
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- rotary kiln
- burner
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- flue gas
- pipeline
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 239000003546 flue gas Substances 0.000 title claims abstract description 88
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 57
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000000605 extraction Methods 0.000 title claims description 24
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 144
- 239000003345 natural gas Substances 0.000 claims abstract description 74
- 238000002485 combustion reaction Methods 0.000 claims abstract description 51
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 38
- 239000002893 slag Substances 0.000 claims abstract description 21
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 19
- 239000000446 fuel Substances 0.000 claims abstract description 10
- 239000000779 smoke Substances 0.000 claims abstract description 10
- 238000004064 recycling Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 2
- 235000017550 sodium carbonate Nutrition 0.000 description 15
- 230000008569 process Effects 0.000 description 13
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- FLDSMVTWEZKONL-AWEZNQCLSA-N 5,5-dimethyl-N-[(3S)-5-methyl-4-oxo-2,3-dihydro-1,5-benzoxazepin-3-yl]-1,4,7,8-tetrahydrooxepino[4,5-c]pyrazole-3-carboxamide Chemical compound CC1(CC2=C(NN=C2C(=O)N[C@@H]2C(N(C3=C(OC2)C=CC=C3)C)=O)CCO1)C FLDSMVTWEZKONL-AWEZNQCLSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/10—Rotary-drum furnaces, i.e. horizontal or slightly inclined internally heated, e.g. by means of passages in the wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/34—Arrangements of heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/36—Arrangements of air or gas supply devices
- F27B7/362—Introducing gas into the drum axially or through the wall
-
- 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
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/36—Arrangements of air or gas supply devices
- F27B7/362—Introducing gas into the drum axially or through the wall
- F27B2007/365—Introducing gas into the drum axially or through the wall longitudinally
-
- 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]
-
- 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
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A method for treating the flue gas of a vanadium extracting rotary kiln by using a burner uses clean energy natural gas as rotary kiln fuel, and recycles the high-temperature flue gas at the tail of the rotary kiln, and the high-temperature flue gas at the tail of the rotary kiln is conveyed to the combustion head of the burner by a hot air fan, and the Roots blower conveys air to the combustion head of the burner to be used as combustion-supporting air of the burner together with the high-temperature flue gas; natural gas is conveyed to a combustion head of the burner by a natural gas pipeline, and the flame temperature peak value of the burner is controlled by adjusting the inlet amount of the natural gas; the heat generated by the combustion of the burner is supplied to the rotary kiln, so that the temperature of a high temperature area in the rotary kiln is controlled to be 650-850 ℃; and (3) roasting the vanadium slag and sodium carbonate loaded in the rotary kiln at a low temperature. The method combines low-nitrogen combustion of a burner, smoke recycling and low-temperature roasting; radically inhibit NO X 、SO 2 Is generated, and high-temperature smoke NO generated at the kiln tail of the rotary kiln X The content is less than or equal to 80mg/m 3 、SO 2 The content is less than or equal to 12mg/m 3 。
Description
Technical Field
The utility model relates to a method for treating vanadium extraction rotary kiln flue gas, in particular to a method for treating vanadium extraction rotary kiln flue gas by using a burner.
Background
In the vanadium extraction process of vanadium slag or stone coal, the rotary kiln is utilized for oxidizing and roasting, so that each valence vanadium in the vanadium extraction raw material is oxidized into the high valence pentavalent vanadium as far as possible, and because coal dust or natural gas is used as fuel in the roasting process, the high temperature combustion is carried out, the high temperature combustion reacts with the vanadium slag or stone coal to generate a large amount of smoke, and the smoke contains components such as particulate matters, nitrogen oxides, sulfur dioxide and the like, and is discharged into the atmosphere through the kiln tail of the rotary kiln, if the smoke is not thoroughly treated, the nitrogen oxides and the sulfur dioxide exceed the standard (NO X ≥200mg/m 3 ，SO 2 ≥400mg/m 3 ) The atmospheric environment is seriously affected.
Along with the increasingly strict national environmental protection policy, the flue gas treatment of the industrial furnace is also a major problem to be solved urgently. The special limit of atmospheric pollutant emission is specified according to table 4 in the emission standard of inorganic chemical pollutants GB 31573-2015: the emission limit of nitrogen oxides is 100mg/m 3 Sulfur dioxide emission limit of 100mg/m 3 . At present, NO in the flue gas of the rotary kiln X 、SO 2 The treatment method comprises the steps of newly building desulfurization and denitration equipment facilities, treating the flue gas, and discharging the flue gas after reaching standards, but the method has the following defects: the equipment investment is up to tens of millions of yuan, and the running cost is millions of yuan; the construction period is long, and the production stopping loss is large; the number of process pipelines is large, and the on-site arrangement is difficult; generating solid wastes such as gypsum, dead catalyst, etc., and generating secondary pollution due to improper disposal.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a method for treating the flue gas of a vanadium extraction rotary kiln by using a burner, which mainly adopts the combination of low-nitrogen combustion of the burner, flue gas recirculation and low-temperature roasting; radically inhibit NO X 、SO 2 The production of the method is low in investment and operation cost, no new solid waste is generated, and the method has pushing and demonstration effects on the development of clean production of vanadium industry, energy conservation and emission reduction.
The technical scheme of the utility model is as follows:
a method for treating vanadium extraction rotary kiln flue gas by using a burner comprises the following specific steps:
(1) The method comprises the steps that a vanadium extraction roasting rotary kiln flue gas treatment system is adopted, the system comprises a rotary kiln, a combustor is arranged at the kiln head of the rotary kiln, the combustor is provided with a central air channel, a natural gas pipeline, an inner rotary air channel and an outer rotary air channel, the inlet of the central air channel is communicated with the central air pipeline, the inlet of the natural gas pipeline is communicated with the natural gas pipeline, the inlet of the outer rotary air channel is communicated with the outer rotary air pipeline, and the inlet of the inner rotary air channel is communicated with the inner rotary air pipeline; the inlets of the central air pipeline and the inner rotational air pipeline are respectively communicated with the outer rotational air pipeline through pipelines, a valve a is arranged on a pipeline between the inner rotational air pipeline and the outer rotational air pipeline, and a valve b is arranged on a pipeline between the central air pipeline and the outer rotational air pipeline; the air outlet of the kiln tail of the rotary kiln is connected with a steam-water separator through a pipeline, the air inlet e of the external cyclone air pipeline is provided with a three-way joint, the steam-water separator is communicated with one branch pipe of the three-way joint through a pipeline, and a hot air fan is arranged on the pipeline between the steam-water separator and the branch pipe of the three-way joint; the other branch pipe of the three-way joint is connected with a Roots blower through a pipeline;
the method comprises the steps of taking clean energy natural gas as rotary kiln fuel, recycling high-temperature flue gas at the kiln tail of the rotary kiln, conveying the kiln tail high-temperature flue gas to a combustion head of a combustor through a hot air fan to serve as one of combustion-supporting air of the combustor, and conveying the natural gas to the combustion head of the combustor through a natural gas pipeline, wherein the flow volume ratio of the high-temperature flue gas to the natural gas is 3:1-8:1, the temperature of the high-temperature flue gas is 80-350 ℃, and the oxygen volume content in the high-temperature flue gas is 10% -19%;
(2) The Roots blower conveys air to a combustion head of the combustor, the Roots blower and high-temperature flue gas are used as combustion-supporting air of the combustor, the air intake accounts for 0% -25% of the total volume of the combustion-supporting air of the combustor, and the flame temperature peak value of the combustor is controlled to be 700 ℃ -1150 ℃ by adjusting the natural gas intake;
(3) Vanadium slag and sodium carbonate are filled into a rotary kiln for low-temperature roasting, wherein the weight ratio of the vanadium slag to the sodium carbonate is 1000:80-1000:160, a step of detecting a position of the base; (4) The heat generated by the combustion of the burner is supplied to the rotary kiln, so that the temperature of a high temperature area in the rotary kiln is controlled within the range of 650-850 ℃;
roasting vanadium slag in the rotary kiln according to the operations of the steps (1) - (4), and NO in the high-temperature smoke of the rotary kiln generated at the tail of the rotary kiln X The content is less than or equal to 80mg/m 3 、SO 2 The content is less than or equal to 12mg/m 3 。
Further, in the step (1), the flow volume ratio of the high-temperature flue gas to the natural gas is 4:1-6:1, and the temperature of the high-temperature flue gas is 100-250 ℃.
Further, the air intake in the step (2) accounts for 0% -15% of the total volume of the combustion-supporting air of the burner, so that NO is reduced X Generating a rate.
Further, the high-temperature flue gas led back from the kiln tail is used as combustion-supporting air, and the combustion-supporting air is mixed with natural gas for combustion so as to control the flame temperature peak value to be 800-900 ℃, wherein the oxygen volume content in the high-temperature flue gas is 13-16%.
Further, in the step (4), the temperature of a high temperature area in the rotary kiln is controlled to 770-820 ℃.
Further, in the step (3), the weight ratio of the vanadium slag to the sodium carbonate is 1000:120-1000:160.
further preferably, an expansion joint I is arranged at the joint of the natural gas pipeline and the natural gas pipeline, an expansion joint II is arranged at the joint of the outer cyclone air channel and the outer cyclone air pipeline, and the length of combustion flame and the shape of flame are adjusted through expansion of the expansion joint I and the expansion joint II.
Further preferably, the burner includes a burner housing, a burner head disposed within the burner housing.
The central position of the combustion head is further preferably provided with a central air channel, an annular inner rotational flow air channel assembly is arranged on the outer annular wall of the central air channel, the inner rotational flow air channel assembly is composed of an inner cylinder and an outer cylinder, inner rotational flow air channels are uniformly distributed on the circumferential surface of the outer wall of the inner rotational flow air channel assembly inner cylinder, the outer rotational flow air channel is formed by a cavity between the inner rotational flow air channel assembly outer cylinder and a combustor shell, and outer rotational flow air holes are uniformly distributed on the circumferential edges of the front wall and the rear wall of the cavity; the front end of the combustion head is positioned at the front part of the inner wall of the burner shell, the natural gas pipelines extend outwards to the outside of the burner shell, and the outlets of the natural gas pipelines extend outwards in the radial direction.
The utility model has the beneficial effects that:
(1) In the process of oxidizing and roasting vanadium slag in the rotary kiln, NO in discharged waste gas (high-temperature smoke of the rotary kiln) is removed by the method X 、SO 2 The content meets the national standard and the requirement, and NO in the waste gas X 、SO 2 The content is not higher than 80mg/m respectively 3 、12mg/m 3 Completely meets the special limit value of 100mg/m of the emission of the atmospheric pollutants in Table 4 in the emission standard of inorganic chemical pollutants GB31573-2015 3 、100mg/m 3 And (5) prescribing. The method fundamentally inhibits NO X 、SO 2 The method has the advantages of low investment, low operation cost and no generation of new solid waste, and is a real environment-friendly method.
(2) Clean energy natural gas is used as fuel, so that the aim of clean production and environmental protection reaching standards is fulfilled.
(3) The high-temperature flue gas of the rotary kiln is recycled and used as one of the combustion-supporting air of the burner, the oxygen content in the high-temperature flue gas is low, the oxygen content in the combustion-supporting air of the burner is further reduced, the reaction of N and O in the combustion of the burner is restrained, the generation amount of NOx is greatly reduced, the emission amount of waste gas can be reduced, the heat of the high-temperature flue gas can be fully utilized, and the energy is saved.
(4) The burner adopts high-temperature flue gas and air as combustion-supporting air together, so that the rotary kiln can realize low-temperature roasting, and has important significance: a. low-temperature roasting saves fuel, saves energy and reduces emission; b. roasting at low temperature, wherein the roasting material is not sintered, thereby being beneficial to oxidation and sodium treatment reaction of vanadium slag and further improving vanadium yield; c. inhibit the generation of nitrogen oxides.
In conclusion, after the method is implemented, the social benefit and the environmental protection benefit are remarkable, the production environment can be greatly improved, the emission of vanadium production smoke dust reaches the national standard, meanwhile, the energy is saved, the emission of smoke is reduced, meanwhile, the burner improves the good roasting condition for the rotary kiln, and the vanadium yield is further improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the structure of the burner head of FIG. 1;
fig. 3 is a left side view of fig. 2.
In the figure: 1-burner, 101-burner housing, 102-burner head, 102 a-central wind channel, 102 b-natural gas pipeline, 102 c-inner rotational wind channel assembly, 102c 1-inner rotational wind channel, inner and outer cylinders 102c2, 102c3, 102 d-outer rotational wind channel, 102 e-outer rotational wind hole, 2-central wind pipe, 3-inner rotational wind pipe, 4-natural gas pipe, 5-outer rotational wind pipe, 6-roots blower, 7-hot wind blower, 8-steam-water separator, 9-rotary kiln, 10-valve a, 11-valve b, 12-expansion joint i, 13-expansion joint ii.
Detailed Description
Example 1
As shown in the figure, the vanadium extraction roasting rotary kiln flue gas treatment system comprises a rotary kiln 9, wherein a burner 1 is arranged at the kiln head of the rotary kiln 9, and the burner 1 comprises a burner shell 101 and a combustion head 102 arranged in the burner shell 101; a central air channel 102a is arranged at the central position of the combustion head 102, an annular inner rotational flow air channel assembly 102c is arranged on the outer annular wall of the central air channel 102a, the inner rotational flow air channel assembly 102c consists of an inner cylinder 102c2 and an outer cylinder 102c3, and inner rotational flow air channels 102c1 are uniformly distributed on the circumferential surface of the outer wall of the inner cylinder 102c 2;
the outer swirl air channel 102d is formed by a cavity between the outer cylinder 102c3 and the burner housing 101, and outer swirl air holes 102e are uniformly distributed on the periphery of the front wall and the rear wall of the cavity;
a plurality of natural gas pipelines 102b which are annularly and uniformly distributed penetrate through the front wall and the rear wall of the cavity, and the natural gas pipelines 102b are positioned between an outer circle formed by the circumferentially distributed outer cyclone holes 102e and an inner circle formed by the inner cyclone channels 102c 1. The front end of the burner head 102 is located at the front of the inner wall of the burner housing 101, the natural gas line 102b extends outwardly of the burner housing 101, and the outlet of the natural gas line 102b extends radially outwardly.
The inlet of the central air channel 102a is communicated with a central air pipeline 2, the inlet of the natural gas pipeline 102b is communicated with a natural gas pipeline 4 through an expansion joint I12, the inlet of the outer cyclone air channel 102d is positioned on the peripheral wall and is communicated with an outer cyclone air pipeline 5 through an expansion joint II 13, and the inlet of the inner cyclone air channel 102c1 is communicated with an inner cyclone air pipeline 3; the inlets of the central air pipeline 2 and the inner rotational air pipeline 3 are respectively communicated with the outer rotational air pipeline 5 through pipelines, a valve a10 is arranged on a pipeline between the inner rotational air pipeline 3 and the outer rotational air pipeline 5, and a valve b11 is arranged on a pipeline between the central air pipeline 2 and the outer rotational air pipeline 5.
The air outlet of the kiln tail of the rotary kiln 9 is connected with a steam-water separator 8 through a pipeline, and the steam in the high-temperature flue gas at the kiln tail of the rotary kiln 9 can be removed through the steam-water separator 8 in the conveying process. The air inlet e of the external cyclone air pipeline 5 is provided with a three-way joint, the steam-water separator 8 is communicated with one branch pipe of the three-way joint through a pipeline, and a hot air fan 7 is arranged on the pipeline between the steam-water separator 8 and the branch pipe of the three-way joint; the other branch pipe of the three-way joint is connected with a Roots blower 6 through a pipeline.
When the rotary kiln works, the valve a10 and the valve b11 are opened, the hot air blower 7 and the Roots blower 6 are started, and when high-temperature flue gas at the tail of the rotary kiln 9 is conveyed to the inlet of the external cyclone air pipeline 5 through the hot air blower 7, the high-temperature flue gas is mixed with the conveying air of the Roots blower 6 to be used as combustion-supporting air of the burner; at this time, a part of the combustion-supporting air of the burner enters the outer cyclone air pipeline through the expansion joint II 13, and the other part enters the inner cyclone air channel 102c1 through the inner cyclone air pipeline 3 through the valve a10 and enters the central air channel 102a through the central air pipeline 2 through the valve b 11; natural gas enters a natural gas pipeline 102b of the combustor 1 from a natural gas pipeline 4 through an expansion joint I12; natural gas is co-combusted in the combustion head 102 of the burner 1 with the aid of the burner combustion air.
The operation process of vanadium roasting and high-temperature flue gas treatment by the vanadium extraction roasting rotary kiln flue gas treatment system is as follows:
(1) The clean energy natural gas is used as the fuel of the rotary kiln 9, the high-temperature flue gas at the tail of the rotary kiln 9 is recycled, the high-temperature flue gas at the tail of the rotary kiln 9 is conveyed to the combustion head 102 of the burner 1 through the hot air fan 7 and used as one of the combustion-supporting air of the burner, the natural gas is conveyed to the combustion head 102 of the burner 1 through the natural gas pipeline 4, the volume ratio of the high-temperature flue gas to the natural gas is 3:1, the temperature of the high-temperature flue gas is 80 ℃, and the oxygen volume content in the high-temperature flue gas is 19%;
(2) The Roots blower 6 transmits air to the combustion head 102 of the combustor 1, the air and high-temperature flue gas are used as combustion-supporting air of the combustor, the air intake accounts for 25% of the total volume of the combustion-supporting air of the combustor, and the flame temperature peak value of the combustor is controlled to be 700 ℃ by adjusting the natural gas intake;
(3) The heat generated by the combustion of the burner 1 is supplied to the rotary kiln 9, so that the temperature of a high temperature area in the rotary kiln 9 is controlled at 650 ℃;
(4) Vanadium slag and sodium carbonate are filled into a rotary kiln 9 for low-temperature roasting, and the weight ratio of the vanadium slag to the sodium carbonate is 1000:80, in the roasting process, sodium carbonate and SO are utilized 2 Reaction and SO removal 2 . Online NO monitoring at kiln tail of rotary kiln X 40mg/m 3 ，SO 2 12mg/m 3 Meets the emission standard.
Example 2
The vanadium extraction roasting rotary kiln flue gas treatment system and the working process of the system are the same as those of the embodiment 1.
The operation process of vanadium roasting and high-temperature flue gas treatment by the vanadium extraction roasting rotary kiln flue gas treatment system is as follows:
(1) The clean energy natural gas is used as the fuel of the rotary kiln 9, the high-temperature flue gas at the tail of the rotary kiln 9 is recycled, the high-temperature flue gas at the tail of the rotary kiln 9 is conveyed to the combustion head 102 through the hot air fan 7 and used as one of the combustion-supporting air of the burner, the natural gas is conveyed to the combustion head 102 through the natural gas pipeline 4, the volume ratio of the high-temperature flue gas to the natural gas is 8:1, the temperature of the high-temperature flue gas is 250 ℃, and the oxygen volume content in the high-temperature flue gas is 16%;
(2) The Roots blower 6 is used for conveying air to the combustion head 102 of the combustor 1, and is used as combustion-supporting air of the combustor 1 together with high-temperature flue gas, the air intake is 15% of the total volume of the combustion-supporting air of the combustor, and the flue gas recirculation technology is matched, so that the flame temperature peak value of the combustor is controlled to be 800 ℃ by adjusting the natural gas intake;
(3) The heat generated by the combustion of the burner 1 is supplied to the rotary kiln 9, so that the temperature of a high temperature area in the rotary kiln 9 is controlled at 820 ℃;
(4) Vanadium slag and sodium carbonate are filled into a rotary kiln 9 for roasting, and the weight ratio of the vanadium slag to the sodium carbonate is 1000:120, in the roasting process, sodium carbonate and SO are utilized 2 Reaction and SO removal 2 . Online NO monitoring at kiln tail of rotary kiln X 68mg/m 3 ，SO 2 11.0mg/m 3 Meets the emission standard.
Example 3
The vanadium extraction roasting rotary kiln flue gas treatment system is the same as in example 1.
When the device works, the valve a10 and the valve b11 are opened, the hot air blower 7 is started, and high-temperature flue gas at the tail of the rotary kiln 9 is conveyed to the combustion head 102 of the combustor 1 through the hot air blower 7 to serve as combustion-supporting air of the combustor; at this time, a part of the combustion-supporting air of the burner enters the outer cyclone air pipeline through the expansion joint II 13, and the other part enters the inner cyclone air channel 102c1 through the inner cyclone air pipeline 3 through the valve a10 and enters the central air channel 102a through the central air pipeline 2 through the valve b 11; natural gas enters a natural gas pipeline 102b of the combustor 1 from a natural gas pipeline 4 through an expansion joint I12; natural gas is co-combusted in the combustion head 102 of the burner 1 with the aid of the burner combustion air.
The operation process of vanadium roasting and high-temperature flue gas treatment by the vanadium extraction roasting rotary kiln flue gas treatment system is as follows:
(1) The clean energy natural gas is used as the fuel of the rotary kiln 9, the high-temperature flue gas at the tail of the rotary kiln 9 is recycled, the high-temperature flue gas at the tail of the rotary kiln 9 is conveyed to the combustion head 102 through the hot air fan 7 and used as the combustion air of the burner, the natural gas is conveyed to the combustion head 102 through the natural gas pipeline 4, the volume ratio of the high-temperature flue gas to the natural gas is 6:1, the temperature of the high-temperature flue gas is 100 ℃, and the oxygen volume content in the high-temperature flue gas is 13%;
(2) This embodiment does not start the Roots blower 6 and does not introduce air as burner combustion air. Controlling the flame temperature peak value of the burner to 900 ℃ by adjusting the inlet amount of natural gas;
(3) The heat generated by the combustion of the burner 1 is supplied to the rotary kiln 9, so that the temperature of a high temperature area in the rotary kiln 9 is controlled at 770 ℃;
(4) Vanadium slag and sodium carbonate are filled into a rotary kiln 9 for roasting, and the weight ratio of the vanadium slag to the sodium carbonate is 1000:160, in the roasting process, sodium carbonate and SO are utilized 2 Reaction and SO removal 2 . Online NO monitoring at kiln tail of rotary kiln X 34mg/m 3 ，SO 2 3.2mg/m 3 Meets the emission standard.
Example 4
The vanadium extraction roasting rotary kiln flue gas treatment system is the same as in example 1.
When the device works, the valve a10 and the valve b11 are opened, the hot air blower 7 is started, and high-temperature flue gas at the tail of the rotary kiln 9 is conveyed to the combustion head 102 of the combustor 1 through the hot air blower 7 to serve as combustion-supporting air of the combustor; at this time, a part of the combustion-supporting air of the burner enters the outer cyclone air pipeline through the expansion joint II 13, and the other part enters the inner cyclone air channel 102c1 through the inner cyclone air pipeline 3 through the valve a10 and enters the central air channel 102a through the central air pipeline 2 through the valve b 11; natural gas enters a natural gas pipeline 102b of the combustor 1 from a natural gas pipeline 4 through an expansion joint I12; natural gas is co-combusted in the combustion head 102 of the burner 1 with the aid of the burner combustion air.
The operation process of vanadium roasting and high-temperature flue gas treatment by the vanadium extraction roasting rotary kiln flue gas treatment system is as follows:
(1) The clean energy natural gas is used as the fuel of the rotary kiln 9, the high-temperature flue gas at the tail of the rotary kiln 9 is recycled, the high-temperature flue gas at the tail of the rotary kiln 9 is conveyed to the combustion head 102 through the hot air fan 7 and used as the combustion air of the burner, the natural gas is conveyed to the combustion head 102 through the natural gas pipeline 4, the volume ratio of the high-temperature flue gas to the natural gas is 4:1, the temperature of the high-temperature flue gas is 350 ℃, and the oxygen volume content in the high-temperature flue gas is 10%;
(2) This embodiment does not start the Roots blower 6 and does not introduce air as burner combustion air. Controlling the flame temperature peak value of the burner to 1150 ℃ by adjusting the inlet amount of natural gas;
(3) The heat generated by the combustion of the burner 1 is supplied to the rotary kiln 9, so that the temperature of a high temperature area in the rotary kiln 9 is controlled at 850 ℃;
(4) Vanadium slag and sodium carbonate are filled into a rotary kiln 9 for roasting, and the weight ratio of the vanadium slag to the sodium carbonate is 1000:130, in the roasting process, soda ash and SO are utilized 2 Reaction and SO removal 2 . Online NO monitoring at kiln tail of rotary kiln X 80mg/m 3 ，SO 2 6.2mg/m 3 Meets the emission standard.
The above is only a specific embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (7)
1. A method for treating vanadium extraction rotary kiln flue gas by using a burner is characterized by comprising the following steps:
the method comprises the following specific steps:
(1) The method comprises the steps that a vanadium extraction roasting rotary kiln flue gas treatment system is adopted, the system comprises a rotary kiln, a combustor is arranged at the kiln head of the rotary kiln, the combustor is provided with a central air channel, a natural gas pipeline, an inner rotary air channel and an outer rotary air channel, the inlet of the central air channel is communicated with the central air pipeline, the inlet of the natural gas pipeline is communicated with the natural gas pipeline, the inlet of the outer rotary air channel is communicated with the outer rotary air pipeline, and the inlet of the inner rotary air channel is communicated with the inner rotary air pipeline; the inlets of the central air pipeline and the inner rotational air pipeline are respectively communicated with the outer rotational air pipeline through pipelines, a valve a is arranged on a pipeline between the inner rotational air pipeline and the outer rotational air pipeline, and a valve b is arranged on a pipeline between the central air pipeline and the outer rotational air pipeline; the air outlet of the kiln tail of the rotary kiln is connected with a steam-water separator through a pipeline, the air inlet e of the external cyclone air pipeline is provided with a three-way joint, the steam-water separator is communicated with one branch pipe of the three-way joint through a pipeline, and a hot air fan is arranged on the pipeline between the steam-water separator and the branch pipe of the three-way joint; the other branch pipe of the three-way joint is connected with a Roots blower through a pipeline;
the burner comprises a burner shell and a burner head arranged in the burner shell, wherein a central air channel is arranged in the central position of the burner head, an annular inner cyclone air channel component is arranged on the outer annular wall of the central air channel, the inner cyclone air channel component consists of an inner cylinder and an outer cylinder, and inner cyclone air channels are uniformly distributed on the circumferential surface of the outer wall of the inner cylinder of the inner cyclone air channel component; the front end of the combustion head is positioned at the front part of the inner wall of the burner shell, the natural gas pipelines extend outwards to the outside of the burner shell, and the outlets of the natural gas pipelines extend outwards in the radial direction;
the method comprises the steps of taking clean energy natural gas as rotary kiln fuel, recycling high-temperature flue gas at the kiln tail of the rotary kiln, conveying the kiln tail high-temperature flue gas to a combustion head of a combustor through a hot air fan to serve as one of combustion-supporting air of the combustor, and conveying the natural gas to the combustion head of the combustor through a natural gas pipeline, wherein the flow volume ratio of the high-temperature flue gas to the natural gas is 3:1-8:1, the temperature of the high-temperature flue gas is 80-350 ℃, and the oxygen volume content in the high-temperature flue gas is 10% -19%;
(2) The Roots blower conveys air to a combustion head of the combustor, the Roots blower and high-temperature flue gas are used as combustion-supporting air of the combustor, the air intake accounts for 0% -25% of the total volume of the combustion-supporting air of the combustor, and the flame temperature peak value of the combustor is controlled to be 700 ℃ -1150 ℃ by adjusting the natural gas intake;
(3) Vanadium slag and sodium carbonate are filled into a rotary kiln for low-temperature roasting, wherein the weight ratio of the vanadium slag to the sodium carbonate is 1000:80-1000:160, a step of detecting a position of the base; (4) The heat generated by the combustion of the burner is supplied to the rotary kiln, so that the temperature of a high temperature area in the rotary kiln is controlled between 650 ℃ and 850 ℃;
according to steps (1) - (4)The operation of roasting vanadium slag in the rotary kiln and NO in the high-temperature smoke of the rotary kiln generated at the tail of the rotary kiln X The content is less than or equal to 80mg/m 3 、SO 2 The content is less than or equal to 12mg/m 3 。
2. The method for treating vanadium extraction rotary kiln flue gas by using a burner according to claim 1, wherein the flow volume ratio of the high-temperature flue gas to the natural gas in the step (1) is 4:1-6:1, and the temperature of the high-temperature flue gas is 100-250 ℃.
3. The method for treating vanadium extraction rotary kiln flue gas by using a burner as set forth in claim 1, wherein the air intake in the step (2) is 0% -15% of the total volume of the burner combustion-supporting air, and NO is reduced X Generating a rate.
4. The method for treating the flue gas of the vanadium extraction rotary kiln by using the burner as claimed in claim 1, wherein the high-temperature flue gas led back from the tail of the kiln is used as combustion-supporting air, and the combustion-supporting air is mixed with natural gas for combustion so as to control the peak temperature of flame to be 800-900 ℃, wherein the oxygen volume content in the high-temperature flue gas is 13-16%.
5. The method for treating flue gas of a rotary kiln for extracting vanadium as recited in claim 1, wherein the temperature of the high temperature area in the rotary kiln in the step (4) is controlled to 770-820 ℃.
6. The method for treating the vanadium extraction rotary kiln flue gas by using the burner as set forth in claim 1, wherein the weight ratio of the vanadium slag to the sodium carbonate in the step (3) is 1000:120-1000:160.
7. the method for treating the vanadium extraction rotary kiln flue gas by using the burner as set forth in claim 1, wherein the expansion joint I is arranged at the joint of the natural gas pipeline and the natural gas pipeline, and the expansion joint II is arranged at the joint of the outer cyclone air channel and the outer cyclone air pipeline.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995005432A1 (en) * | 1993-08-19 | 1995-02-23 | Siemens Aktiengesellschaft | Thermal waste disposal plant and process for operating the same |
| EP1085282A1 (en) * | 1999-09-15 | 2001-03-21 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Oxidant-driven dust recycling process and device for rotary kilns |
| JP2006298685A (en) * | 2005-04-19 | 2006-11-02 | Kawai Sekkai Kogyo Kk | Method for producing quicklime/lightly calcined dolomite |
| CN102912117A (en) * | 2012-11-16 | 2013-02-06 | 洛阳水泥工程设计研究院有限公司 | Double-calcination process of sulfuric acid and rare earth concentrate rotary kiln calcination device |
| EP2789959A1 (en) * | 2013-04-11 | 2014-10-15 | A Tec Holding Gmbh | Method for burning fossil fuels and substitute fuels and burner for carrying out the said method |
| CN207439131U (en) * | 2017-11-29 | 2018-06-01 | 浙江大东吴集团建设新材料有限公司 | Heated air circulation type Expanded Clay Rotary Kilns |
| CN207751345U (en) * | 2017-12-28 | 2018-08-21 | 攀枝花钢城集团有限公司 | Rotary kiln adjustable burner |
| CN109612286A (en) * | 2018-12-10 | 2019-04-12 | 东北大学 | A kind of vanadium slag waste heat recycling system and its application method |
| CN211177900U (en) * | 2019-07-30 | 2020-08-04 | 唐山不锈钢有限责任公司 | Double-channel fuel burner of rotary kiln |
| CN112444138A (en) * | 2020-11-30 | 2021-03-05 | 南京凯盛国际工程有限公司 | Trapping system for improving carbon dioxide content in cement kiln flue gas and working principle thereof |
-
2021
- 2021-09-24 CN CN202111124437.2A patent/CN113803990B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995005432A1 (en) * | 1993-08-19 | 1995-02-23 | Siemens Aktiengesellschaft | Thermal waste disposal plant and process for operating the same |
| EP1085282A1 (en) * | 1999-09-15 | 2001-03-21 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Oxidant-driven dust recycling process and device for rotary kilns |
| JP2006298685A (en) * | 2005-04-19 | 2006-11-02 | Kawai Sekkai Kogyo Kk | Method for producing quicklime/lightly calcined dolomite |
| CN102912117A (en) * | 2012-11-16 | 2013-02-06 | 洛阳水泥工程设计研究院有限公司 | Double-calcination process of sulfuric acid and rare earth concentrate rotary kiln calcination device |
| EP2789959A1 (en) * | 2013-04-11 | 2014-10-15 | A Tec Holding Gmbh | Method for burning fossil fuels and substitute fuels and burner for carrying out the said method |
| CN207439131U (en) * | 2017-11-29 | 2018-06-01 | 浙江大东吴集团建设新材料有限公司 | Heated air circulation type Expanded Clay Rotary Kilns |
| CN207751345U (en) * | 2017-12-28 | 2018-08-21 | 攀枝花钢城集团有限公司 | Rotary kiln adjustable burner |
| CN109612286A (en) * | 2018-12-10 | 2019-04-12 | 东北大学 | A kind of vanadium slag waste heat recycling system and its application method |
| CN211177900U (en) * | 2019-07-30 | 2020-08-04 | 唐山不锈钢有限责任公司 | Double-channel fuel burner of rotary kiln |
| CN112444138A (en) * | 2020-11-30 | 2021-03-05 | 南京凯盛国际工程有限公司 | Trapping system for improving carbon dioxide content in cement kiln flue gas and working principle thereof |
Non-Patent Citations (2)
| Title |
|---|
| 水泥窑烟气脱硝烧成系统的改造;张建;王心伟;张江;林廷全;常文奇;;水泥(第12期);全文 * |
| 链篦机-回转窑球团NO_x排放规律及控制方法;胡兵;叶恒棣;王兆才;周志安;向锡炎;;中国冶金(第04期);全文 * |
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