CN112661422A - Energy-saving flash suspension kiln system - Google Patents
Energy-saving flash suspension kiln system Download PDFInfo
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- CN112661422A CN112661422A CN202110113408.XA CN202110113408A CN112661422A CN 112661422 A CN112661422 A CN 112661422A CN 202110113408 A CN202110113408 A CN 202110113408A CN 112661422 A CN112661422 A CN 112661422A
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- 239000000725 suspension Substances 0.000 title claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 60
- 239000007787 solid Substances 0.000 claims abstract description 50
- 238000013016 damping Methods 0.000 claims abstract description 48
- 239000000428 dust Substances 0.000 claims description 17
- 238000006477 desulfuration reaction Methods 0.000 claims description 15
- 230000023556 desulfurization Effects 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 4
- 238000005339 levitation Methods 0.000 claims 5
- 239000000463 material Substances 0.000 abstract description 37
- 239000000843 powder Substances 0.000 abstract description 32
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 58
- 239000002245 particle Substances 0.000 description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- 238000001354 calcination Methods 0.000 description 8
- 239000003546 flue gas Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010304 firing Methods 0.000 description 5
- 239000000395 magnesium oxide Substances 0.000 description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000003009 desulfurizing effect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000001095 magnesium carbonate Substances 0.000 description 3
- 235000014380 magnesium carbonate Nutrition 0.000 description 3
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 3
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses an energy-saving flash suspension kiln system which comprises a first feeding point, a kiln and a first gas-solid separator, wherein the kiln comprises a first feeding hole, a second feeding hole, a damping section, a burning section, a reflecting section and a clinker outlet, the damping section, the burning section and the reflecting section are sequentially arranged from the first feeding hole to the clinker outlet, the damping section comprises a damping unit and a flow channel, raw materials pass through the damping section from the flow channel, the burning section is communicated with the second feeding hole, the first feeding point is connected with the first feeding hole, the first gas-solid separator comprises a first gas inlet, a first gas outlet and a first discharge hole, the first gas inlet is connected with the first feeding hole, and the first discharge hole is connected with the second feeding hole. The energy-saving flash suspension kiln system provided by the invention has the characteristics of low energy consumption, small pollution, stable product quality, simple structure and less one-time investment, and is suitable for roasting powder lump materials.
Description
Technical Field
The invention belongs to the technical field of non-metal ore sintering, and particularly relates to an energy-saving flash suspension kiln system.
Background
The light-burned magnesium oxide is widely used in the fields of building materials, chemical industry, metallurgy, medicine and the like, and is an ideal material for producing fireproof plates, light partition boards, magnesium sulfate, papermaking, a sulfur removal process, furnace protection splashing slag of steel mills and the like. The quality of the light-burned magnesia depends on the light-burned device used to a great extent, and the selection of the light-burned device integrates the factors of the chemical composition, the granularity, the cracking property, the fuel condition, the product quality requirement and the like of the ore raw material, and the light-burned device used at present mainly comprises a reverberatory furnace, a suspension furnace and a multi-layer furnace.
The reverberatory furnace is a simple and extensive light burning device, the furnace body works continuously, and the charging and discharging are intermittent operations, so the reverberatory furnace is a common light burning device for light burning magnesite ore. The particle size of the magnesium stone entering the reverberatory furnace is usually between 100 and 200mm, the magnesium stone cannot bake powder and crushed aggregates, the obtained product has unstable quality, the dust discharge amount is large, the control is not easy, the pollution is easy to cause, and meanwhile, the heat consumption of the unit product is 7300 and 8300 kJ.kg.-1High production energy consumption, low automation level and high labor intensity.
The structure of the suspension furnace is very suitable for roasting powder, magnesite flotation concentrate powder is usually roasted, but the defects of poor raw material adaptability, difficult adjustment of production parameters and the like are caused by the structural characteristics of the suspension furnace. Once the device is put into operation, it is difficult to adjust its design parameters, requiring long-term commissioning and modification. And the granularity and the components of the raw materials entering the suspension furnace fluctuate, the yield and the quality of the suspension roasting furnace are affected, and the problems of material blockage, difficult material collection and the like are easy to occur.
The size and the number of layers of the hearth of the multi-layer furnace are determined according to the capacity requirement and the thermal efficiency, the granularity range of the calcined material is generally 0-40mm, and the multi-layer furnace can calcine small blocks and is also suitable for calcining powder. The multilayer furnace adopts a multilayer multipoint heating mode, can strictly control the roasting temperature and the heating time, ensures the roasting uniformity, and has good product quality and high activity. However, the multi-layer furnace has the disadvantages of complex structure, long construction period, high maintenance specialty and high manufacturing cost, and the popularization of the light-burned magnesite of the multi-layer furnace is limited.
The tail gas is required to be desulfurized and dedusted in the production process of the light-burned magnesium oxide, the temperature of the flue gas entering the desulfurizing tower is optimally 90-120 ℃, and the bearing temperature of the flue gas allowed to enter the desulfurizing tower is not more than 180 ℃. Once the temperature value is higher than the temperature value, the pre-spraying is required to be started, the flue gas in the flue gas conveying pipeline is cooled, and the flue gas can enter the desulfurizing tower when the temperature of the flue gas is reduced to 90-120 ℃. Meanwhile, for the bag type dust collector widely used at present, the high-temperature gas must be cooled to a temperature below the temperature that the filter material can bear, generally the temperature should be controlled below 120 ℃, and if the high-temperature resistant filter material is adopted, the cost and the service life need to be considered. In the process of cooling the high-temperature flue gas, the sprayed flue gas heat can be wasted, and a large amount of water resources can be consumed. Therefore, the waste of energy can be caused by the overhigh temperature of the tail gas, and the operation of the desulfurization and dust removal equipment can be hindered.
Disclosure of Invention
Aiming at the problems, the invention researches and designs an energy-saving flash suspension kiln system to solve the problems of small particle size range of raw materials, high energy consumption, high pollution and the like of the conventional light magnesium oxide burning device. The technical means adopted by the invention are as follows:
the utility model provides an energy-conserving flash suspension kiln system, includes first batch charging point, kiln and first gas-solid separator, the kiln includes first feed inlet, second feed inlet, damping section, burning section, reflection section and grog export, damping section, burning section and reflection section are followed first feed inlet extremely the grog export sets gradually, the damping section includes damping unit and runner, and the raw materials passes the damping section from the runner, burning section with the second feed inlet communicates with each other, first batch charging point with first feed inlet links to each other, first gas-solid separator includes first air inlet, first gas outlet and first discharge gate, first air inlet with first feed inlet links to each other, first discharge gate with the second feed inlet links to each other.
Preferably, the first feeding point, the first feeding hole and the first gas-solid separator are connected through a three-way pipeline.
Preferably, the gas-solid separator further comprises a second gas-solid separator, the second gas-solid separator comprises a second gas inlet, a second gas outlet and a second discharge hole, the second gas inlet is connected with the first gas outlet, and the second discharge hole is connected with the second feed hole.
Preferably, the device further comprises a second feeding point, and the second feeding point is connected with the second air inlet.
Preferably, the separator further comprises an induced draft fan, the second air outlet is connected with the induced draft fan, and the first gas-solid separator and the second gas-solid separator are cyclone separators.
Preferably, a desulfurization and dust removal unit is arranged between the second gas-solid separator and the induced draft fan, the second gas outlet is connected with the desulfurization and dust removal unit, and the desulfurization and dust removal unit is connected with an inlet of the induced draft fan.
Preferably, the granularity of the raw material at the first feeding point is less than 50mm, and the granularity of the raw material at the second feeding point is less than 1 mm.
Compared with the prior art, the energy-saving flash suspension kiln system has the beneficial effects that:
1. when the raw materials pass through the damping section of the kiln, the preheating time is prolonged under the blocking of the damping unit in the damping section, so that the raw materials are preheated more fully, and the raw materials with larger granularity can be thoroughly preheated; the kiln system can calcine small raw materials and is suitable for powder calcination, and the application range of the particle size of the raw materials is wide.
2. According to the invention, the raw materials are preheated by using the waste heat of the tail gas, the kiln load is reduced, the waste of the heat of the tail gas is avoided, the tail gas with lower temperature after heat exchange can directly enter the desulfurization and dust removal unit, the forced cooling link of the tail gas can be removed, and the production process is simplified; and the kiln system is completely closed, tail gas can be collected and treated in a centralized manner, and the environmental protection pressure is reduced.
3. In the invention, because the feeding direction of the kiln is opposite to the discharging direction of the tail gas of the kiln, fine granular or powdery materials in the damping section and the firing section are in a suspension state, the heat and mass transfer rate is high, and the gas in the kiln is in a violent turbulent state under the action of the damping unit, so that the materials are heated more uniformly, and the decomposition efficiency of the raw materials is high.
4. The energy-saving flash suspension kiln system provided by the invention has the advantages of low energy consumption, small pollution, suitability for powder lump material roasting, stable product quality, simple structure, small occupied area, quick construction, small one-time investment and obvious economic benefit.
Drawings
FIG. 1 is a schematic overall flow diagram of the present invention.
Fig. 2 is a schematic structural view of a strip-shaped damping unit according to the present invention.
Fig. 3 is a view from direction K in fig. 2.
Fig. 4 is a schematic view showing the structure of the spherical damping unit according to the present invention.
Fig. 5 is a schematic structural view of a damping unit in a block shape according to the present invention.
In the figure, 1, a kiln; 2. a first gas-solid separator; 3. a second gas-solid separator; 4. a first feeding point; 5. a second feeding point; 6. a desulfurization and dust removal unit; 7. an induced draft fan; 11. a first feed port; 12. a second feed port; 13. a clinker outlet; 14. a damping section; 15. a firing section; 16. a reflection section; 21. a first air inlet; 22. a first air outlet; 23. a first discharge port; 31. a second air inlet; 32. a second air outlet; 33. a second discharge port; 141. a damping unit; 142. and a flow passage.
Detailed Description
As shown in fig. 1, an energy-saving flash suspension kiln system comprises a kiln 1, a first gas-solid separator 2 and a first feeding point 4. The kiln 1 comprises a first feeding hole 11 positioned at the upper part of the kiln 1, a second feeding hole 12 positioned at the side surface of the kiln 1 and a clinker outlet 13 positioned at the lower part of the kiln 1, and the inside of the kiln 1 is sequentially divided into a damping section 14, a burning section 15 and a reflecting section 16 along the first feeding hole 11 to the clinker outlet 13. Namely, the damping section 14 is positioned at the lower part of the first feeding hole 11, the burning section 15 is positioned at the lower part of the damping section 14, the reflecting section 16 is positioned at the lower part of the burning section 15, and the clinker outlet 13 is positioned at the lower part of the reflecting section 16. The burning section 15 is communicated with the second feeding hole 12, a burning mixed gas inlet is arranged on the burning section 15, and the raw materials enter the burning section 15 and then fully contact with the burning gas therein to be heated and decomposed, and then fall into the reflecting section 16 to be further decomposed. As shown in fig. 2 to 5, the damping section 14 includes a damping unit 141 and a plurality of flow passages 142, the damping unit 141 is filled inside the kiln 1 in the form of a packing, and the raw material passes through the damping section 14 from the flow passages 142. On one hand, the damping unit 141 can prevent the raw material from passing through the damping section 14 too fast, and delay the time of the raw material passing through the damping section 14, so as to prolong the preheating time of the raw material; on the other hand, because the raw materials need to pass through the flow channel 142, and the aperture of the flow channel 142 is far smaller than the diameter of the kiln 1, the distance between the raw materials and the wall of the kiln 1 is reduced, the heat transfer of the kiln 1 is facilitated, the raw material preheating efficiency is improved, and the raw materials with larger particle sizes can be thoroughly preheated. The flow path 142 may be formed by gaps between the plurality of damping units 141, or the damping units 141 themselves may provide a path, as long as it can block the raw material and prolong the preheating time of the raw material. Specifically, the damping units 141 may be in the form of a bar-shaped grid as shown in fig. 2 and 3, in which the damping units 141 are arranged in a staggered manner to form a zigzag flow channel 142, or in the form of a exquisite ball or block as shown in fig. 4 and 5, which does not obstruct the passage of the raw material, but can block the raw material. The first feeding point 4 is connected with the first feeding hole 11, and raw materials are fed into the kiln 1 through the first feeding point 4. The first gas-solid separator 2 comprises a first gas inlet 21, a first gas outlet 22 and a first discharge port 23, wherein the first gas inlet 21 is connected with the first feed port 11, and the first discharge port 23 is connected with the second feed port 12. Tail gas in the kiln 1 enters the first gas-solid separator 2 through the first feeding hole 11 and the first air inlet 21, gas-solid separation is carried out by the first gas-solid separator 2, solid powder carried in the tail gas is separated and then returns to the kiln 1 through the first discharging hole 23 and the second feeding hole 12 for recycling, and resources are fully utilized.
The first feeding point 4, the first feeding port 11 and the first gas inlet 21 of the first gas-solid separator 2 are connected through a three-way pipeline. In the process that the raw materials enter the first feeding hole 11 from top to bottom from the first feeding point 4, the raw materials are back blown by high-temperature tail gas discharged from the first feeding hole 11 from top to bottom, at the moment, larger particles in the raw materials can continuously fall into the kiln 1, and smaller particles in the raw materials can enter the first gas-solid separator 2 along with the tail gas. In the process of the reverse movement of the raw material and the tail gas, the larger particle materials (namely, lump materials) in the raw material can exchange heat with the tail gas, the lump materials are initially preheated by the tail gas and then enter the damping section 14 for secondary preheating, so that the raw material is fully preheated, and the heat of the high-temperature tail gas is recycled; smaller particles (namely powder) in the raw materials enter the first gas-solid separator 2 along with tail gas, and then return to the kiln 1 after gas-solid separation, so that the powder can be fully preheated and recycled, and the problem that the powder is easy to deposit in the damping unit 141 and the flow channel 142 when falling by gravity is avoided.
The gas-solid separator further comprises a second gas-solid separator 3, the second gas-solid separator 3 comprises a second gas inlet 31, a second gas outlet 32 and a second discharge hole 33, the second gas inlet 31 is connected with the first gas outlet 22 of the first gas-solid separator 2, and the second discharge hole 33 is connected with the second feed port 12. The gas discharged from the first gas-solid separator 2 may contain a small amount of solid raw materials, and the solid raw materials can be more fully recovered through the second gas-solid separator 3, so that the utilization rate of the raw materials is ensured.
The device also comprises a second feeding point 5, the second feeding point 5 is connected with a second air inlet 31 of the second gas-solid separator 3, and the first air outlet 22, the second feeding point 5 and the second air inlet 31 are connected through a three-way pipeline. The raw materials fed by the second feeding point 5 are powder materials, the powder materials can enter the second gas-solid separator 3 along with the higher-temperature gas discharged from the first gas outlet 22, and the powder materials are separated by the second gas-solid separator 3 and then enter the kiln 1 from the second feeding hole 12 to be heated and decomposed. In the above process, the powder material will exchange heat with the higher temperature gas, so as to achieve the purposes of preheating the powder material and recovering heat.
Still include draught fan 7, the second gas outlet 32 links to each other with the import of draught fan 7, provides negative pressure wind by draught fan 7, can improve the exhaust velocity of kiln 1 tail gas and the separation efficiency of powder. The first gas-solid separator 2 and the second gas-solid separator 3 are both cyclone separators which can meet the separation requirement of powder, and have the advantages of wide sources, low cost, convenient management and maintenance and contribution to practical application.
And a desulfurization and dust removal unit 6 is arranged between the second gas-solid separator 2 and the induced draft fan 7, the inlet of the desulfurization and dust removal unit 6 is connected with the second gas outlet 32 of the second gas-solid separator 3, and the outlet of the desulfurization and dust removal unit 6 is connected with the gas inlet end of the induced draft fan 7. And the desulfurization and dust removal unit 6 is arranged, so that tail gas can be collected and treated in a centralized manner, and the environmental protection pressure is reduced.
The allowable particle size of the raw material of the first feeding point 4 is below 50mm, and the raw material comprises small lump materials and powder materials, and lump materials or powder materials can be fed into the kiln 1 through the first feeding hole 11. The granularity of the raw materials of the second feeding point 5 is less than 1mm, so that the method is suitable for feeding powder and can ensure that the powder is effectively preheated. The kiln system can feed materials through the first feeding point 4 and the second feeding point 5 respectively, and the applicable raw material particle size range is wide.
The specific working principle of the invention is as follows: the kiln 1 is provided with negative pressure by the induced draft fan 7, and high-temperature tail gas of the kiln 1 is discharged out of the kiln 1 through the first feed inlet 11 and is discharged into the atmosphere through the first air inlet 21, the first air outlet 22, the second air inlet 31, the second air outlet 32, the desulfurization and dust removal unit 6 and the induced draft fan 7 in sequence. After the raw materials are fed from the first feeding point 4, the lump materials in the raw materials enter the kiln 1 from the first feeding port 11, are fully preheated when passing through the flow channel 142 of the damping section 14, and the preheating time is prolonged under the blocking of the damping unit 141 in the damping section 14. After a part of the lump materials passing through the damping layer 14 begin to decompose and enter the burning zone 15, the lump materials can quickly contact with combustion gas and absorb heat to reach the temperature for burning, so that the raw materials can be quickly and fully decomposed. The sintered and unsintered raw materials in the sintering section 15 continuously fall into the reflecting section 16 and are further heated and decomposed, so that the sintering is complete and the homogenizing effect is achieved, and the decomposed product materials are discharged through the clinker outlet 13. One part of the powder with smaller particle size in the raw materials fed from the first feeding point 4 directly falls into the kiln 1 for decomposition, the other part enters the first air inlet 21 along with the high-temperature tail gas discharged from the first feed inlet 11, and after the powder is fully mixed, heat-exchanged and separated in the first gas-solid separator 2, the powder enters the firing section 15 and the reflecting section 16 of the kiln 1 through the first discharge port 23 and the second feed port 12 for thermal decomposition. The tail gas discharged from the first gas outlet 22 enters the second gas-solid separator 3 through the second gas inlet 31, is mixed with the powder thrown in by the second feeding point 5 on the way, is fully mixed in the second gas-solid separator 3, is discharged from the second discharge port 33 after heat exchange is completed, and enters the firing section 15 and the reflecting section 16 of the kiln 1 through the second feed port 12 to be heated and decomposed. Through the kiln system, the roasting can be completed by adding lump materials or powder materials at the first feeding point and adding powder materials at the second feeding point, and finally the product materials are discharged at a clinker outlet 13, and after twice heat exchange separation, the temperature of tail gas can be reduced to 100-120 ℃.
The invention provides a light-burned magnesium oxide kiln with a damping packing layer and a waste heat recovery system thereof, which have the advantages of low energy consumption, small pollution, suitability for powder lump material roasting, stable product quality, simple structure, small occupied area, quick construction, less one-time investment and obvious economic benefit. Specifically, the granularity of the raw materials entering the conventional reverberatory kiln is usually 100-200mm, the raw materials of the suspension kiln are usually flotation concentrate powder with the granularity of less than or equal to 200 mu m, and compared with the feeding characteristics of the reverberatory kiln and the suspension kiln, the invention has the advantages of strong raw material adaptability, capability of calcining small blocks and suitability for powder calcination. In the design of the calcining mode, the fine granular or powdery materials in the damping section 14 and the calcining section 15 are in a suspension state through the convection of the raw materials and the tail gas, and the convection heat transfer and mass transfer rate of the fine granular or powdery materials is much higher than that of the materials in a fixed bed and a boiling bed. Under the interference of the raw materials and the damping unit 141, the gas in the furnace is in a violent turbulent state, the materials are heated more uniformly, and the characteristics that the suspension state is favorable for calcining the particle powder and a fixed bed is suitable for calcining the lump materials are fully utilized. The raw materials are preheated and then fully contacted with combustion gas in the firing section 15 to be heated and decomposed, and then enter the reflecting bin to be continuously decomposed in the process of absorbing hot gas and furnace body radiant heat, so that the light-fired magnesium oxide product can be quickly, stably and effectively produced. In addition, the raw materials are preheated by using the waste heat of the tail gas, the load of a kiln is reduced, the waste of the heat of the tail gas is avoided, the tail gas with lower temperature after heat exchange can directly enter the desulfurization and dust removal unit 6, the forced cooling link of the tail gas is not needed, and the production process is simplified; and the kiln system is completely closed, tail gas can be collected and treated in a centralized manner, and the environmental protection pressure is reduced.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (7)
1. An energy-saving flash suspension kiln system is characterized in that: the device comprises a first feeding point (4), a kiln (1) and a first gas-solid separator (2), wherein the kiln (1) comprises a first feeding hole (11), a second feeding hole (12), a damping section (14), a burning section (15), a reflecting section (16) and a clinker outlet (13), the damping section (14), the burning section (15) and the reflecting section (16) are sequentially arranged from the first feeding hole (11) to the clinker outlet (13), the damping section (14) comprises a damping unit (141) and a flow channel (142), raw materials pass through the damping section (14) from the flow channel (142), the burning section (15) is communicated with the second feeding hole (12), the first feeding point (4) is connected with the first feeding hole (11), and the first gas-solid separator (2) comprises a first air inlet (21), a first air outlet (22) and a first discharge hole (23), the first air inlet (21) is connected with the first feeding hole (11), and the first discharging hole (23) is connected with the second feeding hole (12).
2. The energy efficient flash levitation kiln system as recited in claim 1, wherein: the first feeding point (4), the first feeding port (11) and the first gas-solid separator (2) are connected through a three-way pipeline.
3. An energy efficient flash suspension kiln system according to claim 1 or 2, wherein: the gas-solid separator is characterized by further comprising a second gas-solid separator (3), wherein the second gas-solid separator (3) comprises a second gas inlet (31), a second gas outlet (32) and a second discharge hole (33), the second gas inlet (31) is connected with the first gas outlet (22), and the second discharge hole (33) is connected with the second feed hole (12).
4. The energy efficient flash levitation kiln system as recited in claim 3, wherein: the device also comprises a second feeding point (5), and the second feeding point (5) is connected with the second air inlet (31).
5. The energy efficient flash levitation kiln system as recited in claim 4, wherein: still include draught fan (7), second gas outlet (32) with draught fan (7) link to each other, first gas-solid separator (2) and second gas-solid separator (3) are cyclone.
6. The energy efficient flash levitation kiln system as recited in claim 5, wherein: and a desulfurization and dust removal unit (6) is arranged between the second gas-solid separator (3) and the draught fan (7), the second gas outlet (32) is connected with the desulfurization and dust removal unit (6), and the desulfurization and dust removal unit (6) is connected with an inlet of the draught fan (7).
7. The energy efficient flash levitation kiln system as recited in claim 1, wherein: the granularity of the raw materials of the first feeding point (4) is less than 50mm, and the granularity of the raw materials of the second feeding point (5) is less than 1 mm.
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| CN202110113408.XA CN112661422B (en) | 2021-01-27 | 2021-01-27 | Energy-saving flash suspension kiln system |
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| CN202110113408.XA CN112661422B (en) | 2021-01-27 | 2021-01-27 | Energy-saving flash suspension kiln system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070191214A1 (en) * | 2006-01-31 | 2007-08-16 | Pushpito Kumar Ghosh | Process for the preparation of magnesia (MgO) from crude Mg (OH)2 |
| CN106568331A (en) * | 2016-10-19 | 2017-04-19 | 中冶焦耐(大连)工程技术有限公司 | Large suspension kiln and production process thereof |
| CN108314335A (en) * | 2018-04-18 | 2018-07-24 | 镇江苏博特新材料有限公司 | A kind of light-burned MgO suspension kilns coproduction Mg (OH)2Production technology and device |
| CN111288804A (en) * | 2020-02-17 | 2020-06-16 | 王选福 | Suspension kiln roasting system |
| CN214991183U (en) * | 2021-01-27 | 2021-12-03 | 辽宁荣邦科技有限公司 | Energy-saving flash suspension kiln system |
-
2021
- 2021-01-27 CN CN202110113408.XA patent/CN112661422B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070191214A1 (en) * | 2006-01-31 | 2007-08-16 | Pushpito Kumar Ghosh | Process for the preparation of magnesia (MgO) from crude Mg (OH)2 |
| CN106568331A (en) * | 2016-10-19 | 2017-04-19 | 中冶焦耐(大连)工程技术有限公司 | Large suspension kiln and production process thereof |
| CN108314335A (en) * | 2018-04-18 | 2018-07-24 | 镇江苏博特新材料有限公司 | A kind of light-burned MgO suspension kilns coproduction Mg (OH)2Production technology and device |
| CN111288804A (en) * | 2020-02-17 | 2020-06-16 | 王选福 | Suspension kiln roasting system |
| CN214991183U (en) * | 2021-01-27 | 2021-12-03 | 辽宁荣邦科技有限公司 | Energy-saving flash suspension kiln system |
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| CN112661422B (en) | 2024-02-06 |
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