CN116812955A - Production process and system for preparing regenerated calcium oxide from saponified slag - Google Patents
Production process and system for preparing regenerated calcium oxide from saponified slag Download PDFInfo
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- CN116812955A CN116812955A CN202310626109.5A CN202310626109A CN116812955A CN 116812955 A CN116812955 A CN 116812955A CN 202310626109 A CN202310626109 A CN 202310626109A CN 116812955 A CN116812955 A CN 116812955A
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- kiln
- calcium oxide
- regenerated calcium
- slag
- saponified
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- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 title claims abstract description 147
- 239000000292 calcium oxide Substances 0.000 title claims abstract description 144
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 title claims abstract description 141
- 239000002893 slag Substances 0.000 title claims abstract description 76
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 44
- 239000000428 dust Substances 0.000 claims abstract description 109
- 239000011449 brick Substances 0.000 claims abstract description 82
- 238000010438 heat treatment Methods 0.000 claims abstract description 49
- 238000007127 saponification reaction Methods 0.000 claims abstract description 31
- 239000011230 binding agent Substances 0.000 claims abstract description 30
- 238000001035 drying Methods 0.000 claims abstract description 21
- 238000005245 sintering Methods 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 87
- 238000003860 storage Methods 0.000 claims description 46
- 238000007789 sealing Methods 0.000 claims description 27
- 238000003756 stirring Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 13
- 239000003546 flue gas Substances 0.000 claims description 13
- 238000001354 calcination Methods 0.000 claims description 11
- 239000007767 bonding agent Substances 0.000 claims description 10
- 238000006477 desulfuration reaction Methods 0.000 claims description 10
- 230000023556 desulfurization Effects 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 238000011068 loading method Methods 0.000 claims description 8
- 238000010304 firing Methods 0.000 claims description 5
- 229920002472 Starch Polymers 0.000 claims description 4
- 239000008107 starch Substances 0.000 claims description 4
- 235000019698 starch Nutrition 0.000 claims description 4
- 235000012255 calcium oxide Nutrition 0.000 description 104
- 239000002994 raw material Substances 0.000 description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
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- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a production process and a system for preparing regenerated calcium oxide by saponification slag, wherein the saponification slag is mixed with an organic binder and then pressed into bricks, and the bricks are dried and sintered to prepare a regenerated calcium oxide product, wherein the drying temperature is 150-160 ℃ and the drying time is 18-24 hours; the sintering temperature is 800-900 ℃ and the sintering time is 50-100 hours. The production system comprises a soaping slag pretreatment unit, a binder conveying unit, a mixing brick making unit, a kiln front conveying unit, a heat treatment kiln, a kiln rear product unit and a dust removal unit; the content of calcium oxide in the regenerated calcium oxide product exceeds 92 percent, thereby meeting the requirements of related national standards; the production process is simple and pollution-free, and full-automatic operation can be realized.
Description
Technical Field
The invention relates to the technical field of refractory material production, in particular to a production process and a production system for preparing regenerated calcium oxide from saponified residues.
Background
The soapstock is an industrial waste of propylene oxide production in chemical plants, and the main component is Ca (OH) 2 CaCO (CaCO) 3 Is not effectively developed and utilized, and most enterprises currently adopt an open-air accumulation or burial mode for treatment. The method occupies a large amount of precious land resources through years of accumulation, and simultaneously brings serious threat to the surrounding environment, thereby restricting the operation and development of enterprises. Therefore, the problem of recycling the soapstock needs to be solved.
Calcium oxide is an inorganic compound, and the chemical formula is CaO and commonly known as quicklime. Calcium oxide is widely applied to a plurality of fields such as metallurgical industry, electrolytic aluminum industry, calcium carbide production industry, building material industry and the like as a slag forming material and a production raw material. Calcium oxide cannot exist in nature because it is ineffective due to hydrolysis and carbonization reactions occurring when it is exposed to air for a long period of time, and is currently mainly produced by calcining limestone and dolomite (CaCO as a main component) 3 ) Obtained. In recent years, along with the large exploitation of mine resources in China, environmental protection policies are becoming strict, and the exploitation of the raw materials is becoming more limited. The usual method for obtaining calcium oxide by calcining calcium carbonate has the problem of increasing the price of stone due to the shortage of stone, and the cost for producing quicklime is increasingly high. It is important to find a method for preparing calcium oxide by using novel raw materials.
Disclosure of Invention
The invention provides a production process and a system for preparing regenerated calcium oxide by saponification slag, wherein the saponification slag is mixed with an organic binder and then pressed into bricks, and the bricks are dried and sintered to prepare a regenerated calcium oxide product, wherein the content of calcium oxide in the product exceeds 92 percent, so that the requirements of relevant national standards are met; the production process is simple and pollution-free, and full-automatic operation can be realized.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
a process for preparing regenerated calcium oxide from saponified slag includes such steps as mixing the saponified slag with organic binder, pressing to obtain bricks, drying and calcining; the weight ratio of the soapstock to the organic binder is 97:3 to 93:7, the content of calcium oxide in the regenerated calcium oxide product is more than or equal to 92 percent.
Further, the drying temperature is 150-160 ℃, and the drying time is 18-24 hours; the sintering temperature is 800-900 ℃ and the sintering time is 50-100 hours.
Further, the organic binder is starch.
A production process for preparing regenerated calcium oxide from saponified slag comprises the following specific steps:
1) Conveying saponification slag with granularity below 300mm into a material scattering machine for scattering for 10-30 min, and then conveying into the material stirring machine;
2) The organic binder is sent into a material mixer through a pneumatic conveying system;
3) Mixing and stirring the soaping slag and the organic binder in a material stirrer for 20-30 min, and then conveying the pug into a feed hopper of a brick press for standby;
4) Sending the pug in the feed hopper of the brick machine into an automatic brick machine to be pressed into saponified green bricks;
5) The soaping slag green bricks are orderly stacked on a kiln car through an automatic stacking robot, and the kiln car moves to the front of a heat treatment kiln along a track through a self-propelled trolley in front of the kiln;
6) An inlet kiln door of the heat treatment kiln is opened, a kiln car is pushed into the heat treatment kiln for calcination through a kiln front pusher, and a self-propelled trolley in front of the kiln returns to the automatic stacking robot along a track to wait for next loading; in a heat treatment kiln, the saponified slag brick blank is dried for 18 to 24 hours in a drying chamber at the temperature of between 150 and 160 ℃; then preheating the mixture in a preheating chamber, and then entering a sintering chamber to be sintered for 50-100 hours at 800-900 ℃; finally, the mixture enters a cooling chamber for cooling, and is sent out of the kiln through a kiln tail chain machine; the flue gas of the heat treatment kiln is intensively recovered in the calcining process and then is sent to a desulfurization and denitrification system for treatment and then is discharged after reaching the standard;
7) The kiln car is loaded with calcined regenerated calcium oxide products, and the calcined regenerated calcium oxide products pass through a self-propelled trolley behind the kiln to move above a regenerated calcium oxide receiving groove along a track, and are automatically discharged into the regenerated calcium oxide receiving groove; after the unloading is finished, the kiln car returns to the automatic palletizing robot along the track to wait for the next loading; the self-propelled trolley after the kiln returns to the kiln tail along the track for standby;
8) And delivering the regenerated calcium oxide product in the regenerated calcium oxide receiving groove into a regenerated calcium oxide storage bin for storage.
9) Dust generated in the production process of the soaping slag green bricks is collected to a No. 1 dust collection device through a first dust collection pipeline, and is periodically returned to a feed hopper of a brick press through a first return pipeline for standby; dust generated in the transportation and storage process of the regenerated calcium oxide product is received to a No. 2 dust removal device through a second dust removal pipeline, and is periodically returned to the regenerated calcium oxide storage bin through a second returning pipeline to be transported outside the vehicle.
A production system for preparing regenerated calcium oxide from saponified slag comprises a saponified slag pretreatment unit, a binder conveying unit, a mixed brick making unit, a kiln front conveying unit, a heat treatment kiln, a kiln rear product unit and a dust removal unit; the saponification slag pretreatment unit consists of a saponification slag receiving groove, a material scattering machine and a rotating bucket conveyor which are connected in sequence, and a No. 1 quantitative feeding device is arranged at a discharge hole of the saponification slag receiving groove; the bonding agent conveying unit consists of a bonding agent storage tank and a pneumatic conveying system; the mixing brick making unit consists of a material stirrer, a brick press feed hopper and an automatic brick press which are connected in sequence; the discharge port of the rotating bucket conveyor is connected with the saponification slag feed port of the material mixer; the discharge port of the binder storage tank is connected with the binder feed port of the material mixer through a pneumatic conveying system; the kiln front conveying unit consists of an automatic stacking robot, a kiln car, a kiln front self-propelled trolley and a kiln front pusher; an automatic stacking robot and a kiln car are arranged at the discharge end of the automatic brick press, and the automatic stacking robot is used for stacking saponified slag green bricks onto the kiln car; the kiln car is arranged on the self-propelled trolley in front of the kiln and can move to the front of the heat treatment kiln along the track, and the trolley in front of the kiln is used for pushing the kiln car into the heat treatment kiln; the kiln rear product unit consists of a kiln tail chain machine, a kiln rear self-propelled trolley, a regenerated calcium oxide receiving groove, a bucket elevator, a regenerated calcium oxide storage bin and a bulk machine; the kiln tail chain machine is used for conveying kiln cars filled with regenerated calcium oxide products to the self-propelled trolley behind the kiln, the self-propelled trolley behind the kiln can move to the regenerated calcium oxide receiving groove along a track and can automatically discharge materials into the regenerated calcium oxide receiving groove, a discharge port of the regenerated calcium oxide receiving groove is connected with the regenerated calcium oxide storage bin through a bucket elevator, and a 2# quantitative feeding device is arranged at the discharge port of the regenerated calcium oxide receiving groove; a bulk machine is arranged at the discharge port of the regenerated calcium oxide storage bin; the dust removing unit consists of a No. 1 dust removing device, a first dust removing pipeline, a first returning pipeline, a No. 2 dust removing device, a second dust removing pipeline and a second returning pipeline; the No. 1 dust removing device is respectively connected with a No. 1 quantitative feeding device, a material scattering machine, a rotating bucket conveyor, a material stirring machine and a dust collecting point of an automatic brick press through a dust removing pipeline I; the No. 1 dust removing device is connected with a feeding hopper of the brick machine through a first material returning pipeline; the No. 2 dust collector is respectively connected with the No. 2 quantitative feeding device, the bucket elevator and the dust collecting point of the heat radiator through the dust collecting pipeline, and the No. 2 dust collector is connected with the regenerated calcium oxide storage bin through the returning pipeline.
Further, a flue gas outlet of the heat treatment kiln is connected with a desulfurization and denitrification system through a flue gas pipeline.
Further, the top of the saponification slag receiving groove is provided with grate bars, and the sizes of the grate bar holes are 500mm multiplied by 500mm; the top of the regenerated calcium oxide receiving groove is provided with grate bars, and the sizes of the grate bar holes are 300mm multiplied by 300mm.
Further, the heat treatment kiln is an energy-saving heat treatment kiln and comprises a drying chamber, a preheating chamber, a firing chamber and a cooling chamber.
Further, the discharge port of the No. 1 quantitative feeding device is in sealing connection with the feed port of the material scattering machine; the discharge port of the material scattering machine is connected with the feed port of the rotating bucket conveyor in a sealing way; the discharge port of the rotating bucket conveyor is connected with the feed port of the material mixer in a sealing way; the dust collecting point of the No. 1 quantitative feeding device, the material scattering machine, the rotating hopper conveyor, the material stirring machine and the automatic brick press and the No. 1 dust collecting device are respectively and hermetically connected with a dust collecting pipeline I, and a returning pipeline I is hermetically connected with a returning inlet of the No. 1 dust collecting device and a feeding hopper of the brick press.
Further, the discharge port of the No. 2 quantitative feeding device is in sealing connection with the feed port of the bucket elevator; the discharge port of the bucket elevator is connected with the feed port of the regenerated calcium oxide storage bin in a sealing way; the dust collecting point of the 2# quantitative feeding device, the bucket elevator and the bulk machine and the 2# dust removing device are respectively and hermetically connected with the dust removing pipeline II; and the second material returning pipeline is in sealing connection with a material returning port of the No. 2 dust removing device and the regenerated calcium oxide storage bin.
Compared with the prior art, the invention has the beneficial effects that:
1) The saponification slag resource is recycled, so that waste materials are changed into valuable materials, the raw material cost for producing calcium oxide is greatly reduced, and the economic benefit of enterprises is improved; meanwhile, the problems of land occupation and possible environmental pollution caused by saponification slag are solved, and the social benefit is fully embodied;
2) The production process of preparing the regenerated calcium oxide from the saponified slag is closed in the whole process, and the positions where dust is possibly released are dedusted, so that dust pollution is effectively avoided, and the working environment is improved;
3) The powder in the dust removing device is recycled, so that the production cost is further saved, and no waste of production raw materials and products is realized;
4) The production process for preparing the regenerated calcium oxide from the saponified slag can realize full-process automatic operation, greatly reduce the labor cost and improve the production efficiency;
5) The production process for preparing the regenerated calcium oxide from the saponified slag has no solid waste emission, so that secondary pollution is avoided;
6) The production system for preparing regenerated calcium oxide from the saponified slag has the advantages of high treatment capacity, convenient operation and flexible production adjustment;
7) The calcium oxide content in the calcium oxide product prepared by the production process for preparing the regenerated calcium oxide from the saponified slag exceeds 92%, and meets the requirements of relevant national standards.
Drawings
FIG. 1 is a flow chart of a production process for preparing regenerated calcium oxide from saponified residues.
FIG. 2 is a schematic diagram showing the composition of the parts of the heat treatment kiln according to the present invention.
In the figure: 1. the system comprises a soap slag receiving tank 2.1# quantitative feeding device 3, a material scattering machine 4, a rotating hopper conveyor 5, a material stirring machine 6, a binding agent storage tank 7, a pneumatic conveying system 8, a brick press feeding hopper 9, an automatic brick press 10, an automatic stacking robot 11, a kiln car 12, a kiln front pusher 13, a heat treatment kiln 131, a drying chamber 132, a preheating chamber 133, a firing chamber 134, a cooling chamber 14, a kiln tail chain machine 15, a regenerated calcium oxide receiving tank 16.2# quantitative feeding device 17, a bucket elevator 18, a regenerated calcium oxide storage tank 19, a bulk machine 20.1# dust removing device 21.2# dust removing device 22, a desulfurization and denitrification system
Detailed Description
The following is a further description of embodiments of the invention, taken in conjunction with the accompanying drawings:
as shown in figure 1, the production process for preparing the regenerated calcium oxide from the saponified residues comprises the steps of mixing the saponified residues with an organic binder, pressing the mixture into bricks, drying and sintering the bricks to prepare a regenerated calcium oxide product; the weight ratio of the soapstock to the organic binder is 97:3 to 93:7, the content of calcium oxide in the regenerated calcium oxide product is more than or equal to 92 percent.
Further, the drying temperature is 150-160 ℃, and the drying time is 18-24 hours; the sintering temperature is 800-900 ℃ and the sintering time is 50-100 hours.
Further, the organic binder is starch.
The invention relates to a production process for preparing regenerated calcium oxide from saponified residues, which comprises the following specific steps:
1) Conveying saponification slag with granularity below 300mm into a material scattering machine 3 for scattering for 10-30 min, and then conveying into a material stirrer 5;
2) The organic binder is sent into the material mixer 5 through the pneumatic conveying system 7;
3) Mixing and stirring the soaping slag and the organic binder in a material stirrer 5 for 20-30 min, and then conveying pug into a feed hopper 8 of a brick press for standby;
4) The mud material in the feed hopper 8 of the brick machine is sent to an automatic brick machine 9 to be pressed into saponified green bricks;
5) The soaping slag green bricks are orderly stacked on a kiln car 11 through an automatic stacking robot 10, and the kiln car 11 moves to the front of a heat treatment kiln 13 along a track through a self-propelled trolley in front of the kiln;
6) An inlet kiln door of the heat treatment kiln 13 is opened, a kiln car 11 is pushed into the heat treatment kiln 13 for calcination through a kiln front pusher 12, and the kiln front self-propelled trolley returns to the automatic stacking robot 10 along a track to wait for next loading; in the heat treatment kiln 13, the saponified slag brick blank is dried in the drying chamber 131 for 18 to 24 hours at the temperature of between 150 and 160 ℃; then preheating the mixture in a preheating chamber 132, and then entering a sintering chamber 133 to be sintered for 50-100 hours at 800-900 ℃; finally, the mixture enters a cooling chamber 134 for cooling, and is sent out of the kiln through a kiln tail chain machine 14; the flue gas of the heat treatment kiln 13 is intensively recovered in the calcining process and then is sent to a desulfurization and denitrification system 22 for treatment and then is discharged after reaching the standard;
7) The kiln car 11 is loaded with calcined regenerated calcium oxide products, and the calcined regenerated calcium oxide products pass through a self-propelled trolley behind the kiln to travel to the upper part of the regenerated calcium oxide receiving groove 15 along a track, and are automatically discharged into the regenerated calcium oxide receiving groove 15; after the unloading is finished, the kiln car 11 returns to the automatic palletizing robot 10 along the track to wait for the next loading; the self-propelled trolley after the kiln returns to the kiln tail along the track for standby;
8) The regenerated calcium oxide product in the regenerated calcium oxide receiving groove 15 is sent to the regenerated calcium oxide storage bin 18 for storage.
9) Dust generated in the production process of the soaping slag green bricks is collected to a No. 1 dust collection device 20 through a first dust collection pipeline, and is periodically returned to a feed hopper 8 of the brick press through a first return pipeline for standby; dust generated in the process of conveying and storing the regenerated calcium oxide product is received into a No. 2 dust removing device 21 through a second dust removing pipeline, and is periodically returned into the regenerated calcium oxide storage bin 18 through a second returning pipeline to be loaded and transported.
The invention relates to a production system for preparing regenerated calcium oxide from saponified slag, which comprises a saponified slag pretreatment unit, a binding agent conveying unit, a mixed brick making unit, a kiln front conveying unit, a heat treatment kiln, a kiln rear product unit and a dust removal unit; the saponification slag pretreatment unit consists of a saponification slag receiving tank 1, a material scattering machine 3 and a rotating bucket conveyor 4 which are connected in sequence, wherein a 1# quantitative feeding device 2 is arranged at a discharge hole of the saponification slag receiving tank 1; the bonding agent conveying unit consists of a bonding agent storage tank 6 and a pneumatic conveying system 7; the mixing brick making unit consists of a material stirrer 5, a brick press feeding hopper 8 and an automatic brick press 9 which are connected in sequence; the discharge port of the rotating bucket conveyor 4 is connected with the saponification slag feed port of the material mixer 5; the discharge port of the binder storage tank 6 is connected with the binder feed port of the material mixer 5 through the pneumatic conveying system 7; the kiln front conveying unit consists of an automatic stacking robot 10, a kiln car 11, a kiln front self-propelled trolley and a kiln front trolley pusher 12; an automatic stacking robot 10 and a kiln car 11 are arranged at the discharge end of the automatic brick press 9, and the automatic stacking robot 10 is used for stacking saponified slag green bricks onto the kiln car 11; the kiln car 11 is arranged on the front self-propelled trolley and can move to the front of the heat treatment kiln 13 along a track, and the front kiln car pusher 12 is used for pushing the kiln car 11 into the heat treatment kiln 13; the kiln rear product unit consists of a kiln tail chain machine 14, a kiln rear self-propelled trolley, a regenerated calcium oxide receiving groove 15, a bucket elevator 17, a regenerated calcium oxide storage bin 18 and a bulk machine 19; the kiln tail chain machine 14 is used for conveying a kiln car 11 filled with regenerated calcium oxide products to a self-propelled trolley behind the kiln, the self-propelled trolley behind the kiln can move to a regenerated calcium oxide receiving groove 15 along a track and can automatically discharge materials into the regenerated calcium oxide receiving groove 15, a discharge hole of the regenerated calcium oxide receiving groove 15 is connected with a regenerated calcium oxide storage bin 18 through a bucket elevator 17, and a 2# quantitative feeding device 16 is arranged at the discharge hole of the regenerated calcium oxide receiving groove 15; a bulk machine 19 is arranged at the discharge port of the regenerated calcium oxide storage bin 18; the dust removing unit consists of a No. 1 dust removing device 20, a first dust removing pipeline, a first returning pipeline, a No. 2 dust removing device 21, a second dust removing pipeline and a second returning pipeline; the No. 1 dust removing device 20 is respectively connected with a dust collecting point of the No. 1 quantitative feeding device 2, the material scattering machine 3, the rotating bucket conveyor 4, the material stirrer 5 and the automatic brick press 9 through a dust removing pipeline I; the No. 1 dust removing device 20 is connected with a brick machine feeding hopper 8 through a first material returning pipeline; the No. 2 dust collector 21 is respectively connected with the dust collecting points of the No. 2 quantitative feeding device 16, the bucket elevator 17 and the radiator 19 through dust collecting pipelines, and the No. 2 dust collector 21 is connected with the regenerated calcium oxide storage bin 18 through a returning pipeline.
Further, the flue gas outlet of the heat treatment kiln 13 is connected with the desulfurization and denitrification system 22 through a flue gas pipeline.
Further, the top of the saponification slag receiving groove 1 is provided with grate bars, and the size of the grate bar holes is 500mm multiplied by 500mm; the top of the regenerated calcium oxide receiving groove 15 is provided with grate bars, and the sizes of the grate bar holes are 300mm multiplied by 300mm.
Further, the heat treatment kiln 13 is an energy-saving heat treatment kiln, and comprises a drying chamber 131, a preheating chamber 132, a firing chamber 133 and a cooling chamber 134.
Further, the discharge port of the No. 1 quantitative feeding device 2 is in sealing connection with the feed port of the material scattering machine 3; the discharge port of the material scattering machine 3 is connected with the feed port of the rotating bucket conveyor 4 in a sealing way; the discharge port of the rotating bucket conveyor 4 is connected with the feed port of the material mixer 5 in a sealing way; the dust collecting points of the 1# quantitative feeding device 2, the material scattering machine 3, the rotating hopper conveyor 4, the material stirring machine 5 and the automatic brick machine 9 and the 1# dust removing device 20 are respectively and hermetically connected with a dust removing pipeline I, and a return material pipeline I is hermetically connected with the 1# dust removing device 20 and a return material inlet of a brick machine feeding hopper 8.
Further, the discharge port of the No. 2 quantitative feeding device 16 is in sealing connection with the feed port of the bucket elevator 17; the discharge port of the bucket elevator 17 is connected with the feed port of the regenerated calcium oxide storage bin 18 in a sealing way; the dust collection point of the 2# quantitative feeding device 16, the bucket elevator 17 and the bulk machine 19 and the 2# dust collection device 21 are respectively and hermetically connected with the dust collection pipeline II; and the second material returning pipeline is in sealing connection with a material returning port of the No. 2 dust removing device 21 and the regenerated calcium oxide storage bin 18.
The following examples are given by way of illustration of detailed embodiments and specific procedures based on the technical scheme of the present invention, but the scope of the present invention is not limited to the following examples.
[ example ]
In this embodiment, the main equipment and facilities of the production system for preparing regenerated calcium oxide from saponified residues include: the device comprises a soap slag receiving tank 1, a No. 1 quantitative feeding device 2, a material scattering machine 3, a rotating hopper conveyor 4, a material stirring machine 5, a binding agent storage tank 6, a pneumatic conveying system 7, a brick press feeding hopper 8, an automatic brick press 9, an automatic stacking robot 10, a kiln car 11, a car pusher 12, an energy-saving heat treatment kiln 13, a chain machine 14, a regenerated calcium oxide receiving tank 15, a No. 2 quantitative feeding device 16, a bucket elevator 17, a regenerated calcium oxide bin 18, a bulk machine 19, a No. 1 dust removing device 20, a No. 2 dust removing device 21 and a desulfurization and denitrification system 22.
The top of the soaping slag receiving groove 1 is provided with grate bars, the sizes of the grate bar holes are 500mm multiplied by 500mm, and the grate bars are used for preventing the oversized-granularity soaping slag from entering the soaping slag receiving groove 1. And a 1# quantitative feeding device 2 is arranged at the discharge port of the soaping slag receiving groove 1. The discharge port of the No. 1 quantitative feeding device 2 is in sealing connection with the feed port of the material scattering machine 3. The discharge gate of material machine 3 is broken up and is connected with the feed inlet sealing of rotating bucket conveyer 4, and the discharge gate of rotating bucket conveyer 4 is connected with the saponification sediment feed inlet sealing of material mixer 5.
And a pneumatic conveying system 7 is arranged at the discharge port of the material storage tank 6, and the pneumatic conveying system 7 is connected with a material stirring machine 5.
A brick machine feed hopper 8 is arranged below the discharge port of the material mixer 5, and an automatic brick machine 9 is arranged below the discharge port of the brick machine feed hopper 8.
The 1# quantitative feeding device 2, the material scattering machine 3, the rotating hopper conveyor 4, the material stirring machine 5 and the automatic brick machine 9 are respectively provided with dust collection points, the dust collection points are in sealing connection with the 1# dust collection device 20 through a first dust collection pipeline, and a material return port of the 1# dust collection device 20 is in sealing connection with a material return port of a material feeding hopper 8 of the brick machine through a first material return pipeline.
The automatic stacking robot 10 is arranged at the discharge end (brick outlet) of the automatic brick press 9, pressed saponification slag green bricks can be stacked on the kiln car 11, and the kiln car 11 is arranged on a self-propelled trolley in front of the kiln and can move to the front of the heat treatment kiln 13 along a track.
In this embodiment, the heat treatment kiln 13 is an energy-saving heat treatment kiln, and is divided into four parts of a drying chamber, a preheating chamber, a firing chamber and a cooling chamber. The fuel of the heat treatment kiln 13 may be natural gas, coal gas, heavy oil, or the like, and the embodiment uses natural gas as fuel.
A kiln front pusher 12 is arranged in front of the heat treatment kiln 13 and can push a kiln car 11 on a self-propelled trolley in front of the kiln into the kiln; a kiln tail chain machine 14 is arranged at the kiln tail of the heat treatment kiln 13, and can send the kiln car 11 filled with the calcined calcium oxide product out of the kiln; a regenerated calcium oxide receiving groove 15 is arranged behind the heat treatment kiln 13; the flue gas outlet of the heat treatment kiln 13 is connected with a desulfurization and denitrification system 22 through a flue gas pipeline.
The top of the regenerated calcium oxide receiving groove 15 is provided with grate bars, the sizes of the grate bars are 300mm multiplied by 300mm, and the grate bars are used for preventing the regenerated calcium oxide with excessive granularity from entering the regenerated calcium oxide receiving groove 15. And a 2# quantitative feeding device 16 is arranged at the discharge hole of the regenerated calcium oxide receiving groove 15. The discharge gate of 2# dosing device 16 is connected with the feed inlet sealing of bucket elevator 17, and the discharge gate of bucket elevator 17 is connected with the feed inlet sealing of regenerated calcium oxide warehouse 18. A bulk machine 19 is arranged at the discharge port of the regenerated calcium oxide bin 18.
The No. 2 quantitative feeding device 16, the bucket elevator 17 and the bulk machine 19 are respectively provided with dust collecting points, and are in sealing connection with the No. 2 dust removing device 21 through a dust removing pipeline II. The return port of the No. 2 dust removing device 21 is in sealing connection with the return port of the regenerated calcium oxide storage bin 18 through a second return pipeline.
In this example, the production process for preparing regenerated calcium oxide from saponified slag is as follows:
1) The saponification slag raw materials (with granularity of 0-300 mm) which are naturally piled up are sent into a saponification slag receiving groove 1 for standby through a wheel loader, and the saponification slag raw materials in the saponification slag receiving groove 1 are sent into a material scattering machine 3 through a No. 1 quantitative feeder 2 to be scattered for 10-30 min until no agglomeration state is presented.
2) The dispersed saponification slag (granularity is 0-5 mm) is sent into a material stirrer 5 through a material outlet of a material dispersing machine 3 and a rotating bucket conveyor 4.
3) The bonding agent (starch is adopted in the embodiment) is sent into a bonding agent storage tank 6 for standby through a tank truck, and the bonding agent in the bonding agent storage tank 6 is sent into a material stirrer 5 through a pneumatic conveying system 7.
4) The soaping slag in the material stirrer 5 and the binding agent are mixed and stirred for 20 to 30 minutes until the mixture is uniform.
5) The mixed pug is sent to a feed hopper 8 of a brick press through a discharge port of a material mixer 5 for standby, and the pug in the feed hopper 8 of the brick press is sent to an automatic brick press 9 through the discharge port for pressing into bricks.
6) The pressed soaping slag brick blanks are orderly stacked on a kiln car 11 through an automatic stacking robot 10, the kiln car 11 is placed on a self-propelled trolley in front of the kiln, and the kiln car 11 is transported to the front of a heat treatment kiln 13 for standby through the movement of the self-propelled trolley in front of the kiln along a track.
7) The heat treatment kiln 13 firstly opens the outlet kiln door, the kiln car 11 filled with the previous batch of calcined calcium oxide products is transported to the self-propelled trolley behind the kiln through the kiln tail chain machine 14, then the outlet kiln door is closed, and the inlet kiln door is opened. Kiln car 11 on the self-propelled trolley in front of the kiln is pushed into heat treatment kiln 13 for calcination by kiln front pusher 12, and the self-propelled trolley in front of the kiln returns to automatic stacking robot 10 along the track to wait for loading.
8) After the kiln car 11 enters the heat treatment kiln 13, drying is carried out in a drying chamber for 18 to 24 hours at the temperature of between 150 and 160 ℃; then preheating in a preheating chamber, heating, sintering in a sintering chamber at 800-900 deg.c for 50-100 hr, cooling in a cooling chamber, and conveying out of kiln via kiln tail chain machine 14. In the calcination process, the flue gas of the heat treatment kiln 13 is intensively recovered and then is sent into the desulfurization and denitrification system 22 for treatment, and the flue gas is discharged after being qualified in treatment.
9) The kiln car 11 is loaded with calcined regenerated calcium oxide products, and the calcined regenerated calcium oxide products pass through a self-propelled trolley behind the kiln to move above the regenerated calcium oxide receiving groove 15 along a track, and are automatically discharged from one side into the regenerated calcium oxide receiving groove 15. After the unloading is finished, the kiln car 11 returns to the automatic palletizing robot 10 along the track to wait for loading, and the self-propelled trolley returns to the kiln tail along the track to wait.
10 The regenerated calcium oxide product in the regenerated calcium oxide receiving groove 15 is sent to the bucket elevator 17 through the No. 2 quantitative feeding device 16, and is sent to the regenerated calcium oxide storage bin 18 for storage through the bucket elevator 17.
11 The regenerated calcium oxide product in the regenerated calcium oxide storage bin 18 is loaded and transported outside by the bulk machine 19 at regular intervals.
12 In the preparation process of the regenerated calcium oxide, dust generated by the 1# quantitative feeding device 2, the material scattering machine 3, the rotating hopper conveyor 4, the material stirring machine 5 and the automatic brick machine 9 is collected into the 1# dust removing device 20 through a first dust removing pipeline, and the powder collected in the 1# dust removing device 20 is periodically returned into the brick machine feeding hopper 8 through a first returning pipeline for standby; dust generated by the 2# quantitative feeding device 16, the bucket elevator 17 and the bulk machine 19 is collected into the 2# dust removing device 21 through a second dust removing pipeline, and the powder collected in the 2# dust removing device 21 is periodically returned to the regenerated calcium oxide storage bin 18 through a second returning pipeline to be loaded and transported.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
1. A production process for preparing regenerated calcium oxide from saponified slag is characterized in that the saponified slag is mixed with an organic binder and then pressed into bricks, and a regenerated calcium oxide product is prepared by drying and sintering; the weight ratio of the soapstock to the organic binder is 97:3 to 93:7, the content of calcium oxide in the regenerated calcium oxide product is more than or equal to 92 percent.
2. The process for preparing regenerated calcium oxide from saponified slag according to claim 1, wherein the drying temperature is 150-160 ℃ and the drying time is 18-24 hours; the sintering temperature is 800-900 ℃ and the sintering time is 50-100 hours.
3. The process for producing regenerated calcium oxide from saponified residue according to claim 1, wherein the organic binder is starch.
4. A process for preparing regenerated calcium oxide from saponified slag as claimed in claim 1, 2 or 3, characterized by comprising the following steps:
1) Conveying saponification slag with granularity below 300mm into a material scattering machine for scattering for 10-30 min, and then conveying into the material stirring machine;
2) The organic binder is sent into a material mixer through a pneumatic conveying system;
3) Mixing and stirring the soaping slag and the organic binder in a material stirrer for 20-30 min, and then conveying the pug into a feed hopper of a brick press for standby;
4) Sending the pug in the feed hopper of the brick machine into an automatic brick machine to be pressed into saponified green bricks;
5) The soaping slag green bricks are orderly stacked on a kiln car through an automatic stacking robot, and the kiln car moves to the front of a heat treatment kiln along a track through a self-propelled trolley in front of the kiln;
6) An inlet kiln door of the heat treatment kiln is opened, a kiln car is pushed into the heat treatment kiln for calcination through a kiln front pusher, and a self-propelled trolley in front of the kiln returns to the automatic stacking robot along a track to wait for next loading; in a heat treatment kiln, the saponified slag brick blank is dried for 18 to 24 hours in a drying chamber at the temperature of between 150 and 160 ℃; then preheating the mixture in a preheating chamber, and then entering a sintering chamber to be sintered for 50-100 hours at 800-900 ℃; finally, the mixture enters a cooling chamber for cooling, and is sent out of the kiln through a kiln tail chain machine; the flue gas of the heat treatment kiln is intensively recovered in the calcining process and then is sent to a desulfurization and denitrification system for treatment and then is discharged after reaching the standard;
7) The kiln car is loaded with calcined regenerated calcium oxide products, and the calcined regenerated calcium oxide products pass through a self-propelled trolley behind the kiln to move above a regenerated calcium oxide receiving groove along a track, and are automatically discharged into the regenerated calcium oxide receiving groove; after the unloading is finished, the kiln car returns to the automatic palletizing robot along the track to wait for the next loading; the self-propelled trolley after the kiln returns to the kiln tail along the track for standby;
8) Delivering the regenerated calcium oxide product in the regenerated calcium oxide receiving groove into a regenerated calcium oxide storage bin for storage;
9) Dust generated in the production process of the soaping slag green bricks is collected to a No. 1 dust collection device through a first dust collection pipeline, and is periodically returned to a feed hopper of a brick press through a first return pipeline for standby; dust generated in the transportation and storage process of the regenerated calcium oxide product is received to a No. 2 dust removal device through a second dust removal pipeline, and is periodically returned to the regenerated calcium oxide storage bin through a second returning pipeline to be transported outside the vehicle.
5. A production system for preparing regenerated calcium oxide from saponified residues by implementing the production process according to any one of claims 1 to 4, which is characterized by comprising a saponification residue pretreatment unit, a binder conveying unit, a mixing brick making unit, a pre-kiln conveying unit, a heat treatment kiln, a post-kiln product unit and a dust removal unit; the saponification slag pretreatment unit consists of a saponification slag receiving groove, a material scattering machine and a rotating bucket conveyor which are connected in sequence, and a No. 1 quantitative feeding device is arranged at a discharge hole of the saponification slag receiving groove; the bonding agent conveying unit consists of a bonding agent storage tank and a pneumatic conveying system; the mixing brick making unit consists of a material stirrer, a brick press feed hopper and an automatic brick press which are connected in sequence; the discharge port of the rotating bucket conveyor is connected with the saponification slag feed port of the material mixer; the discharge port of the binder storage tank is connected with the binder feed port of the material mixer through a pneumatic conveying system; the kiln front conveying unit consists of an automatic stacking robot, a kiln car, a kiln front self-propelled trolley and a kiln front pusher; an automatic stacking robot and a kiln car are arranged at the discharge end of the automatic brick press, and the automatic stacking robot is used for stacking saponified slag green bricks onto the kiln car; the kiln car is arranged on the self-propelled trolley in front of the kiln and can move to the front of the heat treatment kiln along the track, and the trolley in front of the kiln is used for pushing the kiln car into the heat treatment kiln; the kiln rear product unit consists of a kiln tail chain machine, a kiln rear self-propelled trolley, a regenerated calcium oxide receiving groove, a bucket elevator, a regenerated calcium oxide storage bin and a bulk machine; the kiln tail chain machine is used for conveying kiln cars filled with regenerated calcium oxide products to the self-propelled trolley behind the kiln, the self-propelled trolley behind the kiln can move to the regenerated calcium oxide receiving groove along a track and can automatically discharge materials into the regenerated calcium oxide receiving groove, a discharge port of the regenerated calcium oxide receiving groove is connected with the regenerated calcium oxide storage bin through a bucket elevator, and a 2# quantitative feeding device is arranged at the discharge port of the regenerated calcium oxide receiving groove; a bulk machine is arranged at the discharge port of the regenerated calcium oxide storage bin; the dust removing unit consists of a No. 1 dust removing device, a first dust removing pipeline, a first returning pipeline, a No. 2 dust removing device, a second dust removing pipeline and a second returning pipeline; the No. 1 dust removing device is respectively connected with a No. 1 quantitative feeding device, a material scattering machine, a rotating bucket conveyor, a material stirring machine and a dust collecting point of an automatic brick press through a dust removing pipeline I; the No. 1 dust removing device is connected with a feeding hopper of the brick machine through a first material returning pipeline; the No. 2 dust collector is respectively connected with the No. 2 quantitative feeding device, the bucket elevator and the dust collecting point of the heat radiator through the dust collecting pipeline, and the No. 2 dust collector is connected with the regenerated calcium oxide storage bin through the returning pipeline.
6. The production system for preparing regenerated calcium oxide from saponified residues according to claim 5, wherein a flue gas outlet of the heat treatment kiln is connected with a desulfurization and denitrification system through a flue gas pipeline.
7. The production system for preparing regenerated calcium oxide from saponified slag in claim 5, wherein the top of the saponified slag receiving groove is provided with grate bars, and the size of the grate bar holes is 500mm x 500mm; the top of the regenerated calcium oxide receiving groove is provided with grate bars, and the sizes of the grate bar holes are 300mm multiplied by 300mm.
8. The production system for preparing regenerated calcium oxide from saponified slag as set forth in claim 5, wherein said heat-treating kiln is an energy-saving heat-treating kiln, and comprises a drying chamber, a preheating chamber, a firing chamber and a cooling chamber.
9. The production system for preparing regenerated calcium oxide from saponified residues according to claim 5, wherein the discharge port of the No. 1 quantitative feeding device is in sealing connection with the feed port of the material scattering machine; the discharge port of the material scattering machine is connected with the feed port of the rotating bucket conveyor in a sealing way; the discharge port of the rotating bucket conveyor is connected with the feed port of the material mixer in a sealing way; the dust collecting point of the No. 1 quantitative feeding device, the material scattering machine, the rotating hopper conveyor, the material stirring machine and the automatic brick press and the No. 1 dust collecting device are respectively and hermetically connected with a dust collecting pipeline I, and a returning pipeline I is hermetically connected with a returning inlet of the No. 1 dust collecting device and a feeding hopper of the brick press.
10. The production system for preparing regenerated calcium oxide from saponified residues according to claim 5, wherein the discharge port of the No. 2 quantitative feeding device is in sealing connection with the feed port of the bucket elevator; the discharge port of the bucket elevator is connected with the feed port of the regenerated calcium oxide storage bin in a sealing way; the dust collecting point of the 2# quantitative feeding device, the bucket elevator and the bulk machine and the 2# dust removing device are respectively and hermetically connected with the dust removing pipeline II; and the second material returning pipeline is in sealing connection with a material returning port of the No. 2 dust removing device and the regenerated calcium oxide storage bin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310626109.5A CN116812955A (en) | 2023-05-30 | 2023-05-30 | Production process and system for preparing regenerated calcium oxide from saponified slag |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310626109.5A CN116812955A (en) | 2023-05-30 | 2023-05-30 | Production process and system for preparing regenerated calcium oxide from saponified slag |
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