CN210163146U - Limestone powder instantaneous sintering device and system thereof - Google Patents
Limestone powder instantaneous sintering device and system thereof Download PDFInfo
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- CN210163146U CN210163146U CN201920941092.1U CN201920941092U CN210163146U CN 210163146 U CN210163146 U CN 210163146U CN 201920941092 U CN201920941092 U CN 201920941092U CN 210163146 U CN210163146 U CN 210163146U
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- 238000005245 sintering Methods 0.000 title claims abstract description 88
- 235000019738 Limestone Nutrition 0.000 title claims abstract description 87
- 239000006028 limestone Substances 0.000 title claims abstract description 87
- 239000000843 powder Substances 0.000 title claims abstract description 80
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 190
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 95
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 50
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000292 calcium oxide Substances 0.000 claims abstract description 27
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 25
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 25
- 238000002485 combustion reaction Methods 0.000 claims description 77
- 239000000463 material Substances 0.000 claims description 67
- 238000006243 chemical reaction Methods 0.000 claims description 53
- 238000003786 synthesis reaction Methods 0.000 claims description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- 239000007789 gas Substances 0.000 claims description 37
- 230000015572 biosynthetic process Effects 0.000 claims description 34
- 238000000746 purification Methods 0.000 claims description 33
- 239000007788 liquid Substances 0.000 claims description 25
- 238000007667 floating Methods 0.000 claims description 24
- 239000000779 smoke Substances 0.000 claims description 21
- 238000000926 separation method Methods 0.000 claims description 19
- 238000005192 partition Methods 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 11
- 239000003546 flue gas Substances 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 239000000567 combustion gas Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 37
- 239000012535 impurity Substances 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000010924 continuous production Methods 0.000 abstract description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 3
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 3
- 239000013064 chemical raw material Substances 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 239000004571 lime Substances 0.000 abstract description 3
- 238000004904 shortening Methods 0.000 abstract description 2
- 238000005979 thermal decomposition reaction Methods 0.000 abstract description 2
- 235000012255 calcium oxide Nutrition 0.000 description 23
- 239000000047 product Substances 0.000 description 15
- 239000000243 solution Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 239000007864 aqueous solution Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 2
- 239000004449 solid propellant Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000012824 chemical production Methods 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 239000000109 continuous material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007105 physical stamina Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The application discloses instantaneous sintering device of limestone powder, its system aims at solving current method and adopting the shaft kiln sintering limestone, and its production cycle is longer, and because the existence of impurity, the quality of lime receives the problem of influence. The method can directly obtain the calcium oxide product, effectively solves the problem of product impurities, can meet the requirement of continuous production, and is favorable for shortening the production period. Further, this application provides a sintering system based on aforementioned device, and it can select separately to the calcium oxide after the sintering to the carbon dioxide that thermal decomposition produced when the reutilization sintering synthesizes light calcium carbonate, can effectively reduce the manufacturing cost of calcium carbonate product, has higher economic value and application prospect. Through determination, the light calcium carbonate prepared by the method can reach the nanometer level, and is a high-quality chemical raw material. The method can effectively reduce the emission of carbon dioxide, and is more environment-friendly.
Description
Technical Field
The invention relates to the field of materials, in particular to the field of material preparation, and specifically relates to a limestone powder instantaneous sintering device and a limestone powder instantaneous sintering system. By adopting the method and the device, the limestone powder can be rapidly sintered, the product quality is stable and reliable, and the method and the device have extremely high application value.
Background
The traditional limestone sintering method comprises the following steps: the limestone is piled up in the vertical kiln layer by layer, coal is paved between every two layers of limestone, the limestone is combusted in the vertical kiln, and the limestone is sintered through high temperature generated by the combustion; after sintering, the blocky quicklime is obtained. Currently, shaft kilns are typically as high as about thirty meters.
In this way, coal is used as a fuel, and a large amount of impurities are generated after combustion. Based on the existence of impurity, need sort the lime stone after the burning, the operation is comparatively loaded down with trivial details. Meanwhile, the quality of lime is also affected by the existence of impurities. In addition, the limestone is produced by sintering in a vertical kiln, the period is more than four hours, and the production period is longer.
Therefore, the application provides a brand-new limestone sintering device to solve the problems.
Disclosure of Invention
The invention aims to: aiming at the problems that the production period of limestone is long and the quality of lime is affected due to the existence of impurities in the conventional method for sintering limestone by using a vertical kiln, a limestone powder instantaneous sintering device and a limestone powder instantaneous sintering system are provided. Traditional limestone usually adopts the shaft kiln to sinter, has impurity such as coal ash between the limestone, and production cycle is longer, and this application provides a sintering method that completely differs, can directly obtain the calcium oxide product, has effectively solved the problem of product impurity, and can satisfy continuous production's needs, is favorable to shortening production cycle. Further, this application provides a sintering system based on aforementioned device, and it can select separately to the calcium oxide after the sintering to the carbon dioxide that thermal decomposition produced when the reutilization sintering synthesizes light calcium carbonate, can effectively reduce the manufacturing cost of calcium carbonate product, has higher economic value and application prospect. Through determination, the light calcium carbonate prepared by the method can reach a nanometer level, is a high-quality chemical raw material, and has a high application value. The method has the advantages of ingenious conception and novel processing mode, can realize the direct conversion from limestone to calcium oxide and calcium carbonate products, has wide market application prospect, and can effectively meet the requirements of industrial production and application. Furthermore, when calcium carbonate is sintered in a conventional vertical kiln, carbon dioxide generated by the calcium carbonate is directly exhausted, and the calcium carbonate is prepared by using the calcium carbonate, so that the emission of carbon dioxide can be effectively reduced, and the calcium carbonate is more environment-friendly.
In order to achieve the purpose, the invention adopts the following technical scheme:
an instantaneous limestone powder sintering device comprises a combustion main body, a direct-fired combustor, a partition plate assembly, an annular floating plate and a rotary driving device;
the combustion main body comprises a combustion pipe body, a feeding end, a discharging end and a feeding hole, wherein the discharging end is used for being connected with an induced draft fan, the feeding hole is used for enabling limestone powder to enter the combustion pipe body;
the combustion port of the direct-fired burner is arranged in the combustion pipe body, and limestone powder entering through the feeding hole can move along the axial direction of the combustion pipe body under the driving of combustion gas of the direct-fired burner;
the combustion pipe body comprises a reaction section and a feeding section which is connected with the reaction section into a whole;
the reaction section is movably connected with the feeding end, the combustion pipe body can rotate relative to the feeding end, the partition plate assembly is arranged on the inner wall of the reaction section, the partition plate assembly is formed by sequentially and alternately arranging a plurality of inclined plates on the inner wall of the reaction section, and flame sprayed by the direct-fired burner can sequentially heat the inclined plates and secondarily combust materials through the inclined plates;
the annular throwing and floating plates are arranged on the inner wall of the material conveying section, and the materials reacted in the reaction section react with the high-temperature gas in the combustion pipe body again under the throwing and floating action of the annular throwing and floating plates;
the rotary driving device is connected with the combustion pipe body and can drive the combustion pipe body to rotate;
the discharge end is connected with the feeding section and the material in the feeding section can be output through the discharge end.
The distance from the extending end of the inclined plate to the pipe wall is larger than the radius of the combustion pipe body, and flame sprayed by the direct-fired burner can carry out secondary combustion on materials through the inclined plate and drive the materials to move in a curve shape along a channel between the inclined plates.
The direct-fired burner is one or two of a liquid fuel burner and a gas fuel burner.
The annular floating plate is an annular bulge.
An instantaneous limestone powder sintering method comprises the following steps:
(1) limestone powder enters the combustion main body through the feeding hole, is subjected to primary combustion with flame sprayed by the direct-fire combustor, and moves forwards under the driving of the flame;
(2) the flame sprayed by the direct-fired burner heats the partition plate assembly, and the partition plate assembly heats the powder for the second time and performs the second reaction on the powder;
(3) and the powder subjected to the second reaction enters the middle part of the combustion main body under the action of the annular floating plate, is subjected to a third reaction with high-temperature gas generated by combustion, moves forwards under the drive of the high-temperature gas to complete the sintering process, and is finally output through the discharge end.
A limestone powder sintering treatment system comprises the limestone powder instantaneous sintering device, an induced draft fan, a sorting unit, a first connecting pipe, a light calcium carbonate synthesizer and a smoke purifier;
the induced draft fan is connected with the discharge end of the limestone powder instantaneous sintering device and can provide negative pressure for the limestone powder instantaneous sintering device, the induced draft fan, the sorting unit, the light calcium carbonate synthesizer and the smoke purifier are sequentially connected through pipelines, materials sent out by the induced draft fan are sequentially sorted by the sorting unit, the light calcium carbonate synthesizer synthesizes light calcium carbonate, and the tail gas is treated by the smoke purifier and then is discharged up to the standard;
the separation unit is connected with the light calcium carbonate synthesizer through a first connecting pipe, the light calcium carbonate synthesizer is connected with the smoke purifier through an air outlet pipe, and the smoke purifier can purify the gas fed by the light calcium carbonate synthesizer;
the light calcium carbonate synthesizer comprises a synthesis tower, an air outlet pipe, a liquid discharge pipe, a purification plate and a circulating water spraying device, wherein a reaction water tank for containing water is formed at the lower end of the synthesis tower, calcium oxide and carbon dioxide can be sent into the water in the reaction water tank by the tail end of a first connecting pipe, the sent calcium oxide powder can react with the carbon dioxide and the water to generate calcium carbonate, the air outlet pipe is arranged at the top end of the synthesis tower, the liquid discharge pipe is arranged at the bottom end of the synthesis tower, the liquid concentration in the synthesis tower can be discharged through the liquid discharge pipe after reaching a set requirement, and the purification plate is arranged in the synthesis tower;
the number of the purification plates is at least one, the purification plates are in an inverted cone shape, a plurality of small holes are formed in the purification plates, and the smoke can pass through the small holes in the purification plates;
the circulating water spraying device is respectively connected with the upper end and the lower end of the synthesis tower through pipelines and can convey liquid at the lower end of the synthesis tower to the upper end of the synthesis tower and enable water to be in countercurrent contact with flue gas so as to realize the synthesis reaction of calcium carbonate.
The purification plates are two to ten and are sequentially arranged in the synthesis tower along the vertical direction.
The purification plate is in an inverted cone shape.
The sorting unit comprises at least two sorting components, each sorting component comprises a sorting feeding pipe, a sorting tank body, a stirrer, a sorting discharging pipe and a sorting storage tank, the stirrer is arranged in the sorting tank body and can stir materials in the sorting tank body, the lower end of the sorting tank body is connected with the sorting storage tank through a sorting material pipe, and the materials at the lower end of the sorting tank body can enter the sorting storage tank through the sorting material pipe;
the sorting tank body in the sorting unit is sequentially connected in series through a sorting inlet pipe, the first-stage sorting tank body in the sorting unit is connected with an induced draft fan through the sorting inlet pipe, materials after the instantaneous limestone powder sintering device is sintered can enter the first-stage sorting tank body through the induced draft fan, the last-stage sorting tank body in the sorting unit is connected with a light calcium carbonate synthesizer through a first connecting pipe, and materials after the sorting unit can be sent into the light calcium carbonate synthesizer to synthesize calcium carbonate.
The sorting components are three.
An instantaneous limestone powder sintering method comprises the following steps:
(1) limestone powder enters the combustion main body through the feeding hole, is subjected to primary combustion with flame sprayed by the direct-fire combustor, and moves forwards under the driving of the flame;
(2) the flame sprayed by the direct-fired burner heats the partition plate assembly, and the partition plate assembly heats the powder for the second time and performs the second reaction on the powder;
(3) the powder after the second reaction enters the middle part of the combustion main body under the action of the annular floating plate, is subjected to a third reaction with high-temperature gas generated by combustion, moves forwards under the drive of the high-temperature gas to finish the sintering process, and is finally output through the discharge end;
(4) the output materials are sent into a sorting unit after passing through a draught fan, and are sorted by the sorting unit to respectively obtain calcium oxide products with different particle sizes;
(5) the gas separated by the separation unit is sent into the water solution of a light calcium carbonate synthesizer, the gas contains carbon dioxide and calcium oxide, the carbon dioxide and water react in the light calcium carbonate synthesizer to produce calcium carbonate, the calcium carbonate is dissolved in the water solution, and the rest gas is sent into a smoke purifier; after the calcium carbonate solution in the light calcium carbonate synthesizer reaches a set value, the calcium carbonate solution can be sent out through a liquid discharge pipe, and the obtained solution is dried to obtain a calcium carbonate product;
(6) the flue gas can be discharged after being treated in the flue gas purifier to reach the standard.
In the step 5, after the concentration of calcium carbonate in the aqueous solution reaches the set requirement, a new aqueous solution is supplemented to ensure the progress of the calcium carbonate synthesis reaction.
In view of the foregoing problems, the present application provides a limestone powder instantaneous sintering device and a system thereof. As mentioned above, in the conventional limestone sintering, limestone is generally placed layer by layer in a shaft kiln, and coal is arranged between the limestone, and the sintering period of the method is about 4 hours, and a large amount of impurities are generated by using the coal as fuel.
Therefore, the application provides a brand-new limestone powder instantaneous sintering device which comprises a combustion main body, a direct-fired combustor, a partition plate assembly, an annular floating plate and a rotary driving device. In this structure, the burning main part includes burning body, feed end, discharge end, feed inlet, and the feed inlet setting is at the feed end, and feed end, discharge end set up respectively at the both ends of burning body, adopt respectively between feed end and the burning body, between burning body and the discharge end to move sealing connection, and feed end, discharge end and ground keep static relatively, and feeding end, discharge end rotation relatively can be fired to the burning body. Meanwhile, the combustion port of the direct-fired burner is arranged in the combustion pipe body.
In this application, the burning body includes the reaction section, with the reaction section continuous material conveying section as an organic whole. Wherein, reaction section and feed end swing joint, baffle subassembly set up on the inner wall of reaction section, and the baffle subassembly is set up on the inner wall of reaction section by a plurality of swash plate in proper order in turn. The annular throwing floating plates are arranged on the inner wall of the feeding section, the rotary driving device is connected with the combustion pipe body, and the discharge end is connected with the feeding section.
In the application, the direct-fired burner can adopt one or two of a liquid fuel burner and a gas fuel burner, can sinter limestone powder, and does not generate corresponding combustion impurities; the discharge end is used for linking to each other with the draught fan, provides corresponding negative pressure through the draught fan, is favorable to the material to remove along the direction that the feed end arrived the discharge end.
Meanwhile, the instant limestone powder sintering method based on the sintering device is provided. The sintering process is as follows: the crushed limestone powder enters the combustion main body through a feed inlet in the combustion pipe body; the combustion port of the direct-fired combustor is positioned in the combustion pipe body, and the generated flame can directly perform high-temperature sintering on limestone powder; meanwhile, the flame extension direction of the direct-fired burner is vertical to the falling direction of the limestone powder raw material, and hot gas generated by the flame can drive the material to move along the axial direction of the combustion pipe body and continuously sinter; hot air flow firstly drives materials to enter a reaction section, inclined plates are sequentially and alternately arranged on the inner wall of the reaction section, the included angle between each inclined plate and the central axis of a combustion pipe body is 15-80 degrees, the inclined plates are alternately arranged at intervals, the distance from the extending end of each inclined plate to the pipe wall is larger than the radius of the combustion pipe body, and flame sprayed by a direct-fired burner heats the inclined plates under the shielding of the inclined plates; the materials move in a curve shape along the channel between the inclined plates, the heated inclined plates can prolong the sintering time of the materials on one hand, and the inclined plates are used as a sintering heat source to secondarily heat the materials on the other hand; the rotary driving device is connected with the combustion pipe body and can drive the combustion pipe body to rotate through the driving device; the feeding section is provided with the corresponding annular throwing floating plate, namely the inner wall of the feeding section is provided with the annular bulge, and materials in the feeding section can be thrown up through the matching between the rotation of the combustion pipe body and the annular bulge; the material sintered in the reaction section enters the material feeding section, and the material reacts with the high-temperature gas in the combustion tube body again under the throwing and floating action of the annular throwing and floating plate, so that the sintering is fully completed; and finally outputting the sintered materials through a discharge end to finish the sintering process of the limestone.
Compared with the prior art, the method avoids the problem of impurities brought by solid fuels such as coal and the like in the combustion process, and can effectively ensure the quality of products; the traditional sintering method obtains blocky and solid products, and corresponding crushing is needed in subsequent use, while the application directly obtains powdery products, the granularity of the powdery products is uniform and reliable, and the problem of secondary crushing is avoided; the sintering time of the existing limestone sintering method is about four hours, and based on the change of the sintering mode, the sintering time can be greatly shortened, so that the method has remarkable progress significance; after the sintering of the existing method is finished, the corresponding product is taken out manually after the vertical kiln is required to be reduced to a certain temperature, continuous production cannot be realized, and the intermittent cooling and heating of the vertical kiln increases the energy consumption to a certain extent.
Further, this application claims a limestone powder sintering processing system based on aforementioned limestone powder instantaneous sintering device, it includes aforementioned limestone powder instantaneous sintering device, draught fan, selects separately unit, first connecting pipe, light calcium carbonate synthesizer, flue gas purifier. Wherein, the draught fan links to each other with the discharge end of limestone powder instantaneous sintering device, and draught fan, sorting unit, light calcium carbonate synthesizer, gas cleaning ware pass through the pipeline and link to each other in proper order. In the structure, the induced draft fan provides negative pressure for the limestone powder instantaneous sintering device and provides power for the movement of materials; meanwhile, the materials sent out by the draught fan are sent into a sorting unit for sorting, then synthesized by a light calcium carbonate synthesizer, and finally subjected to tail gas treatment by a smoke purifier, and then discharged after reaching the standard.
In the application, the sorting unit comprises at least two sorting components, each sorting component comprises a sorting feeding pipe, a sorting tank body, a stirrer, a sorting discharging pipe and a sorting storage tank, the stirrer is arranged in the sorting tank body, and the lower end of the sorting tank body is connected with the sorting storage tank through the sorting discharging pipe; the sorting tank bodies in the sorting unit are sequentially connected in series through sorting inlet pipes, the first-stage sorting tank body in the sorting unit is connected with the induced draft fan through the sorting inlet pipes, and the last-stage sorting tank body in the sorting unit is connected with the light calcium carbonate synthesizer through a first connecting pipe. In the structure, materials sintered by the limestone powder instantaneous sintering device firstly enter a first-stage separation tank body after passing through an induced draft fan; the stirrer is used for stirring the materials in the separation tank body, so that the smooth separation is ensured; the materials at the lower end of the separation tank body enter a separation storage tank through a separation material pipe and are collected; the materials sent out by the induced draft fan are sent into a sorting unit for sorting to respectively obtain calcium oxide powder with different particle sizes; finally, the materials sorted by the sorting unit are sent to a light calcium carbonate synthesizer for synthesizing calcium carbonate.
At present, the light calcium carbonate is mainly obtained by sorting sintered limestone and then reacting the limestone with carbon dioxide, so that the production cost of the light calcium carbonate is higher. In addition, due to the influence of impurities existing in limestone sintered in a vertical kiln, the cost for sorting the light calcium carbonate by the existing method is higher, a separate carbon dioxide gas generating device is also needed, and the production period is longer.
In the application, carbon dioxide obtained after limestone sintering is used as a raw material, and the carbon dioxide reacts with the sorted calcium oxide powder and water to generate light calcium carbonate (the calcium carbonate is in a nanometer level), so that the requirements of high-grade chemical production raw materials can be met. According to the application, the whole device is hermetically connected, and carbon dioxide generated by sintering enters a light calcium carbonate synthesizer along with calcium oxide for reaction.
In this application, select separately the unit and link to each other with light calcium carbonate synthesizer through first connecting pipe, light calcium carbonate synthesizer passes through the outlet duct and links to each other with gas cleaning ware. Based on this structure, gas purifier carries out purification treatment to the gas that sends into through the light calcium carbonate synthesizer, discharges after reaching standard.
In this application, light calcium carbonate synthesizer includes synthetic tower, outlet duct, fluid-discharge tube, purification board, circulating water spray set, and the lower extreme of synthetic tower forms the reaction water tank of flourishing water, and the terminal of first connecting pipe can send into the aquatic in reaction water tank with calcium oxide and carbon dioxide, and the outlet duct setting is on the synthetic tower top, and the fluid-discharge tube setting is in the synthetic tower bottom, and the purification board setting is in the synthetic tower. Meanwhile, the number of the purification plates is at least one, the purification plates are in an inverted cone shape, and a plurality of small holes are formed in the purification plates; the circulating water spraying device is respectively connected with the upper end and the lower end of the synthesis tower through pipelines. In the structure, calcium oxide powder and carbon dioxide are sent into an aqueous solution of a reaction water tank and carry out corresponding reaction; meanwhile, the gas is in countercurrent contact in the synthesis tower, so that the synthesis reaction is fully carried out; in the process, the circulating water spraying device can convey the liquid at the lower end of the synthesis tower to the upper end of the synthesis tower, and make water and flue gas contact in a countercurrent manner so as to ensure that the calcium carbonate synthesis reaction is fully carried out; and after the concentration of the liquid in the synthesis tower reaches the set requirement, the liquid can be discharged through a liquid discharge pipe. In the structure, the purification plate is in an inverted cone shape, and a plurality of small holes are arranged on the purification plate; by adopting the structure, the blockage of the synthesis tower can be effectively avoided, and the contact area of the flue gas and the solution is further increased. Preferably, there are three sorting assemblies.
Further, the application provides a limestone powder instantaneous sintering method based on the treatment system, which comprises the steps of instantaneous sintering, calcium oxide separation, light calcium carbonate synthesis and standard discharge. By adopting the method, the whole process from limestone powder raw materials to calcium oxide finished products, calcium oxide separation and light calcium carbonate generation can be realized, solid fuels are not involved, and introduction of external impurities is avoided; meanwhile, the sintering time can be greatly reduced, the production period is shortened, and the requirement of continuous production is met; in addition, carbon dioxide generated by sintering can be directly used in the production process of calcium carbonate, so that the emission of carbon dioxide is reduced, and the resource utilization of carbon dioxide is realized; the method can directly prepare the nano-grade light calcium carbonate (which is a chemical raw material with a high added value) based on the change of the preparation process, effectively simplifies the preparation process of the light calcium carbonate, is stable and reliable, can meet the requirement of industrial production, and has high economic value.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural view of a limestone powder sintering treatment system in example 1.
The labels in the figure are: 1. the direct-fired burner comprises a direct-fired burner body, 2, a partition plate assembly, 3, an annular floating plate, 4, a rotary driving device, 5, a feeding end, 6, a discharging end, 7, a feeding hole, 8, a reaction section, 9, a feeding section, 10, an induced draft fan, 11, a first connecting pipe, 12, a smoke purifier, 20, a synthesis tower, 21, an air outlet pipe, 22, a liquid discharge pipe, 23, a purification plate, 30, a separation feeding pipe, 31, a separation tank body, 32, a stirrer, 33, a separation discharging pipe, 34 and a separation storage tank.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Example 1
As shown in the figure, the limestone powder sintering treatment system of the embodiment comprises an instantaneous limestone powder sintering device, an induced draft fan, a sorting unit, a first connecting pipe, a light calcium carbonate synthesizer and a smoke purifier.
In this embodiment, the limestone powder instantaneous sintering device includes burning main part, direct fire combustor, baffle subassembly, annular board, rotary drive device of throwing. Wherein, the burning main part includes burning body, feed end, discharge end, feed inlet, and feed end, discharge end set up respectively at the both ends of burning body, adopt the dynamic seal to be connected between feed end and the burning body, adopt the dynamic seal to be connected between burning body and the discharge end, and the relative feed end of burning body physical stamina, discharge end rotate, and the feed inlet setting is on the feed end. Meanwhile, the combustion port of the direct-fired burner is arranged in the combustion pipe body. The combustion pipe body comprises a reaction section and a feeding section which is connected with the reaction section into a whole; the reaction section is movably connected with the feeding end, the partition plate assembly is arranged on the inner wall of the reaction section, the partition plate assembly is formed by sequentially and alternately arranging a plurality of inclined plates on the inner wall of the reaction section, and the distance from the extending end of each inclined plate to the pipe wall is greater than the radius of the combustion pipe body; the annular throwing floating plates are arranged on the inner wall of the material conveying section. Meanwhile, the rotary driving device is connected with the combustion pipe body, and the rotary driving device can drive the combustion pipe body to rotate. In this embodiment, the inclined plates are three to twelve, the direct-fired burners are liquid fuel burners or gas fuel burners, and the annular floating plate is an annular protrusion. In the embodiment, the inner diameter of the combustion pipe body is 600-1200 mm, the length of the reaction section is 2-10 m, and the length of the feeding section is 2-6 m.
In the limestone powder instantaneous sintering device, crushed limestone powder enters the combustion main body through a feed inlet in the combustion pipe body; the combustion port of the direct-fired combustor is positioned in the combustion pipe body, and the generated flame can directly perform high-temperature sintering on limestone powder; meanwhile, the flame extension direction of the direct-fired burner is vertical to the falling direction of the limestone powder raw material, and hot gas generated by the flame can drive the material to move along the axial direction of the combustion pipe body and continuously sinter; hot air flow firstly drives materials to enter a reaction section, inclined plates are sequentially and alternately arranged on the inner wall of the reaction section, the included angle between each inclined plate and the central axis of a combustion pipe body is 15-80 degrees, the inclined plates are alternately arranged at intervals, the distance from the extending end of each inclined plate to the pipe wall is larger than the radius of the combustion pipe body, and flame sprayed by a direct-fired burner heats the inclined plates under the shielding of the inclined plates; the materials move in a curve shape along the channel between the inclined plates, the heated inclined plates can prolong the sintering time of the materials on one hand, and the inclined plates are used as a sintering heat source to secondarily heat the materials on the other hand; the rotary driving device is connected with the combustion pipe body and can drive the combustion pipe body to rotate through the driving device; the feeding section is provided with the corresponding annular throwing floating plate, namely the inner wall of the feeding section is provided with the annular bulge, and materials in the feeding section can be thrown up through the matching between the rotation of the combustion pipe body and the annular bulge; the material sintered in the reaction section enters the material feeding section, and the material reacts with the high-temperature gas in the combustion tube body again under the throwing and floating action of the annular throwing and floating plate, so that the sintering is fully completed; and finally outputting the sintered materials through a discharge end to finish the sintering process of the limestone.
Meanwhile, the induced draft fan is connected with the discharge end of the limestone powder instantaneous sintering device, and the induced draft fan, the separation unit, the light calcium carbonate synthesizer and the smoke purifier are sequentially connected through pipelines. The induced draft fan is used for providing negative pressure for the limestone powder instantaneous sintering device and providing power for movement of powder; materials sent out by the induced draft fan are sorted by the sorting unit in sequence, synthesized by the light calcium carbonate synthesizer, and subjected to tail gas treatment by the smoke purifier, and then are discharged after reaching the standard.
In this embodiment, select separately the unit and link to each other with the light calcium carbonate synthesizer through first connecting pipe, the light calcium carbonate synthesizer passes through the outlet duct and links to each other with gas purifier. In this embodiment, the sorting unit adopts three sorting unit, and sorting unit is including selecting separately the inlet pipe, select separately the jar body, agitator, sorting discharging pipe, sorting storage tank, and the agitator setting is internal at sorting tank and the agitator can stir the internal material of sorting tank, and the lower extreme of sorting jar body is through selecting separately the material pipe and select separately the material that the storage tank links to each other and sorting jar body lower extreme and select separately the material pipe can get into in the sorting storage tank through selecting separately. The sorting tank bodies in the sorting unit are sequentially connected in series through sorting feed pipes, the first-stage sorting tank bodies in the sorting unit are connected with the induced draft fan through the sorting feed pipes, materials after the limestone powder instantaneous sintering device is sintered can enter the first-stage sorting tank bodies through the induced draft fan, and the last-stage sorting tank bodies in the sorting unit are connected with the light calcium carbonate synthesizer through the first connecting pipes and can be fed into the light calcium carbonate synthesizer to synthesize calcium carbonate. In this embodiment, provide power through the draught fan, select separately step by step through three sorting assembly, obtain the calcium oxide material of different particle sizes respectively. After three-stage separation, the nanometer calcium oxide particles carried in the airflow enter the light calcium carbonate synthesizer along with the airflow.
In this application, light calcium carbonate synthesizer includes synthetic tower, outlet duct, fluid-discharge tube, purification board, circulating water spray set, and the lower extreme of synthetic tower forms the reaction water tank of flourishing water, and the terminal of first connecting pipe can send into the aquatic in reaction water tank with calcium oxide and carbon dioxide, and the outlet duct setting is on the synthetic tower top, and the fluid-discharge tube setting is in the synthetic tower bottom, and the purification board setting is in the synthetic tower. Meanwhile, the number of the purification plates is three to ten, the purification plates are in an inverted cone shape, and small holes are uniformly distributed on the purification plates; the circulating water spraying device is respectively connected with the upper end and the lower end of the synthesis tower through pipelines. In the structure, calcium oxide powder and carbon dioxide are sent into an aqueous solution of a reaction water tank and carry out corresponding reaction; meanwhile, the gas is in countercurrent contact in the synthesis tower, so that the synthesis reaction is fully carried out; in the process, the circulating water spraying device can convey the liquid at the lower end of the synthesis tower to the upper end of the synthesis tower, and make water and flue gas contact in a countercurrent manner so as to ensure that the calcium carbonate synthesis reaction is fully carried out; and after the concentration of the liquid in the synthesis tower reaches the set requirement, the liquid can be discharged through a liquid discharge pipe. In the structure, the purification plate is in an inverted cone shape, and small holes are uniformly distributed on the purification plate; by adopting the structure, the blockage of the synthesis tower can be effectively avoided, and the contact area of the flue gas and the solution is further increased.
And finally, the light calcium carbonate synthesizer is connected with the smoke purifier through an air outlet pipe, and the smoke purifier can purify the gas sent by the light calcium carbonate synthesizer.
Further, the present embodiment provides a method of instantaneous sintering of limestone powder. Which comprises the following steps:
(1) limestone powder enters the combustion main body through the feeding hole, is subjected to primary combustion with flame sprayed by the direct-fire combustor, and moves forwards under the driving of the flame;
(2) the flame sprayed by the direct-fired burner heats the partition plate assembly, and the partition plate assembly heats the powder for the second time and performs the second reaction on the powder;
(3) the powder after the second reaction enters the middle part of the combustion main body under the action of the annular floating plate, is subjected to a third reaction with high-temperature gas generated by combustion, moves forwards under the drive of the high-temperature gas to finish the sintering process, and is finally output through the discharge end;
(4) the output materials are sent into a sorting unit after passing through a draught fan, and are sorted by the sorting unit to respectively obtain calcium oxide products with different particle sizes;
(5) the gas separated by the separation unit is sent into the water solution of a light calcium carbonate synthesizer, the gas contains carbon dioxide and calcium oxide, the carbon dioxide and water react in the light calcium carbonate synthesizer to produce calcium carbonate, the calcium carbonate is dissolved in the water solution, and the rest gas is sent into a smoke purifier; after the calcium carbonate solution in the light calcium carbonate synthesizer reaches a set value, the calcium carbonate solution can be sent out through a liquid discharge pipe, and the obtained solution is dried to obtain a calcium carbonate product;
(6) the flue gas can be discharged after being treated in the flue gas purifier to reach the standard.
And 5, supplementing a new aqueous solution after the concentration of the calcium carbonate in the aqueous solution is saturated so as to ensure the progress of the calcium carbonate synthesis reaction.
Through determination, the separation unit of the embodiment can respectively obtain calcium oxide powder with different particle sizes, and the light calcium carbonate prepared by the light calcium carbonate synthesizer can reach the nanometer level. The product prepared by the embodiment has high purity, uniform granularity and better market application prospect.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (9)
1. An instantaneous limestone powder sintering device is characterized by comprising a combustion main body, a direct-fired combustor, a partition plate assembly, an annular floating plate and a rotary driving device;
the combustion main body comprises a combustion pipe body, a feeding end, a discharging end and a feeding hole, wherein the discharging end is used for being connected with an induced draft fan, the feeding hole is used for enabling limestone powder to enter the combustion pipe body;
the combustion port of the direct-fired burner is arranged in the combustion pipe body, and limestone powder entering through the feeding hole can move along the axial direction of the combustion pipe body under the driving of combustion gas of the direct-fired burner;
the combustion pipe body comprises a reaction section and a feeding section which is connected with the reaction section into a whole;
the reaction section is movably connected with the feeding end, the combustion pipe body can rotate relative to the feeding end, the partition plate assembly is arranged on the inner wall of the reaction section, the partition plate assembly is formed by sequentially and alternately arranging a plurality of inclined plates on the inner wall of the reaction section, and flame sprayed by the direct-fired burner can sequentially heat the inclined plates and secondarily combust materials through the inclined plates;
the annular throwing and floating plates are arranged on the inner wall of the material conveying section, and the materials reacted in the reaction section react with the high-temperature gas in the combustion pipe body again under the throwing and floating action of the annular throwing and floating plates;
the rotary driving device is connected with the combustion pipe body and can drive the combustion pipe body to rotate;
the discharge end is connected with the feeding section and the material in the feeding section can be output through the discharge end.
2. The limestone powder instantaneous sintering device according to claim 1, wherein the distance from the extending end of the inclined plate to the pipe wall is greater than the radius of the combustion pipe body, and the flame sprayed from the direct fire burner can carry out secondary combustion on the material through the inclined plate and drive the material to move in a curve along the channel between the inclined plates.
3. The limestone powder instantaneous sintering device according to claim 1, wherein the direct fire burner is one or both of a liquid fuel burner, a gas fuel burner.
4. The limestone powder instantaneous sintering device according to any one of claims 1 to 3, wherein the annular floating plate is an annular protrusion.
5. A limestone powder sintering treatment system is characterized by comprising the limestone powder instantaneous sintering device of any one of claims 1 to 4, an induced draft fan, a sorting unit, a first connecting pipe, a light calcium carbonate synthesizer and a smoke purifier;
the induced draft fan is connected with the discharge end of the limestone powder instantaneous sintering device and can provide negative pressure for the limestone powder instantaneous sintering device, the induced draft fan, the sorting unit, the light calcium carbonate synthesizer and the smoke purifier are sequentially connected through pipelines, materials sent out by the induced draft fan are sequentially sorted by the sorting unit, the light calcium carbonate synthesizer synthesizes light calcium carbonate, and the tail gas is treated by the smoke purifier and then is discharged up to the standard;
the separation unit is connected with the light calcium carbonate synthesizer through a first connecting pipe, the light calcium carbonate synthesizer is connected with the smoke purifier through an air outlet pipe, and the smoke purifier can purify the gas fed by the light calcium carbonate synthesizer;
the light calcium carbonate synthesizer comprises a synthesis tower, an air outlet pipe, a liquid discharge pipe, a purification plate and a circulating water spraying device, wherein a reaction water tank for containing water is formed at the lower end of the synthesis tower, calcium oxide and carbon dioxide can be sent into the water in the reaction water tank by the tail end of a first connecting pipe, the sent calcium oxide powder can react with the carbon dioxide and the water to generate calcium carbonate, the air outlet pipe is arranged at the top end of the synthesis tower, the liquid discharge pipe is arranged at the bottom end of the synthesis tower, the liquid concentration in the synthesis tower can be discharged through the liquid discharge pipe after reaching a set requirement, and the purification plate is arranged in the synthesis tower;
the number of the purification plates is at least one, the purification plates are in an inverted cone shape, a plurality of small holes are formed in the purification plates, and the smoke can pass through the small holes in the purification plates;
the circulating water spraying device is respectively connected with the upper end and the lower end of the synthesis tower through pipelines and can convey liquid at the lower end of the synthesis tower to the upper end of the synthesis tower and enable water to be in countercurrent contact with flue gas so as to realize the synthesis reaction of calcium carbonate.
6. The limestone powder sintering treatment system of claim 5 wherein the purification plates are two to ten, the purification plates being arranged in series in a vertical direction within the synthesis tower.
7. The limestone powder sintering treatment system of claim 5 wherein the purification plate is of an inverted conical shape.
8. The limestone powder sintering processing system according to claim 5, 6 or 7, wherein the sorting unit comprises at least two sorting components, the sorting components comprise a sorting feed pipe, a sorting tank body, a stirrer, a sorting discharge pipe and a sorting storage tank, the stirrer is arranged in the sorting tank body and can stir materials in the sorting tank body, the lower end of the sorting tank body is connected with the sorting storage tank through a sorting material pipe, and the materials at the lower end of the sorting tank body can enter the sorting storage tank through the sorting material pipe;
the sorting tank body in the sorting unit is sequentially connected in series through a sorting inlet pipe, the first-stage sorting tank body in the sorting unit is connected with an induced draft fan through the sorting inlet pipe, materials after the instantaneous limestone powder sintering device is sintered can enter the first-stage sorting tank body through the induced draft fan, the last-stage sorting tank body in the sorting unit is connected with a light calcium carbonate synthesizer through a first connecting pipe, and materials after the sorting unit can be sent into the light calcium carbonate synthesizer to synthesize calcium carbonate.
9. The limestone powder sintering treatment system of claim 8 wherein the sorting assemblies are three.
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| CN112110467A (en) * | 2019-06-21 | 2020-12-22 | 李平 | Limestone powder instantaneous sintering device, system and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112110467A (en) * | 2019-06-21 | 2020-12-22 | 李平 | Limestone powder instantaneous sintering device, system and method thereof |
| CN112110467B (en) * | 2019-06-21 | 2024-06-11 | 李平 | Instant limestone powder sintering device, system and method thereof |
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