CN103408231A - Environment-friendly lime slaking and packaging process - Google Patents
Environment-friendly lime slaking and packaging process Download PDFInfo
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- CN103408231A CN103408231A CN201310213964XA CN201310213964A CN103408231A CN 103408231 A CN103408231 A CN 103408231A CN 201310213964X A CN201310213964X A CN 201310213964XA CN 201310213964 A CN201310213964 A CN 201310213964A CN 103408231 A CN103408231 A CN 103408231A
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Abstract
The invention discloses an environment-friendly lime slaking and packaging process. According to the environment-friendly lime slaking and packaging process, environment-friendly treatments are carried out in different process steps during lime slaking by using a bag dust remover, a pulse dust remover, spray head water curtain treatment and a dust remover at an air outlet in an upper cover of a three-level slaker to ensure that the treatment efficiency of hot steam and dust generated during lime processing is more than 99%, and the problem of environmental pollution caused lime slaking production is solved; besides, after the lime slaking, the product package has a dust collecting structure, the technological process does not have environment-friendly dead points, the whole flow is controlled by a PLC (programmable logic controller), the labor intensity is reduced, and the production efficiency is improved. The slaked limes with different specifications generated by the environment-friendly lime slaking and packaging process are respectively applied to the industries including sintering desulphurization systems of steel works, chemical plants, alkali preparation, sugar preparation, sewage treatment, oil paints, coatings, toothpastes, pharmacy and the like.
Description
Technical field:
The present invention relates to lime slaking processing, relate in particular to a kind of environment-friendly type lime slaking and technology of the package.
Background technology:
The lime slaking process is the important component part of water treatment, Air Pollution Control and some chemical industry, processing efficiency and the process cost of the whole process of impact.
Lime can discharge a large amount of hot steams and dust while adding water digestion, and site environment is caused to serious pollution.Existing method is to adopt wet processing and electric precipitation method, and at first, wet processing is to utilize nature negative pressure emission steam and dust, but easily causes discharge tube to stop up and cause the whole plant can't trouble-free operation; Secondly, the electric precipitation method is that dusty gas is separated by electricity during through high tension electrostatic field, on grit and negative ion combined belt, after negative electricity, the trend anode surface discharges and deposits, but the heat steam of supervening in digestive process and wet dust can be to serious corrosive effects of generation such as equipment.
To sum up state, there is serious deficiency in current lime slaking complete processing on environmental protection treatment, therefore, can bring serious pollution to production environment, the environmental issue of how processing in the lime slaking course of processing is a current difficult problem urgently to be resolved hurrily, in addition, it is reasonable not that the lime slaking complete processing is connected with technology of the package, improved the complicacy of technology of the package processing.
Summary of the invention:
In order to make up the prior art problem, the purpose of this invention is to provide a kind of environment-friendly type lime slaking and technology of the package, in different operation sections, select different processing structures, improved greatly the efficiency of processing, make processing environment be guaranteed, digestion process and technology of the package are connected rationally, improve the reasonableness of technique.
Technical scheme of the present invention is as follows:
Environment-friendly type lime slaking and technology of the package, is characterized in that, specifically comprises the following steps:
1), adopt conveyor to send into surge tank unslaked lime, through the surge tank discharge port fall into material conveying trolley with on average per hour the amount of 1 ~ 30 ton unslaked lime is inputted to fine crusher equably, through fine crusher, the unslaked lime of bulk is broken into to the thin piece of 2 ~ 5mm size, the dust produced in shattering process, by surge tank upper cover pipeline and refining dolly tail end upper pipe, enter sack cleaner and stoped flour dust overflow, be referred to as the first environmental protection treatment;
2), the thin piece of the unslaked lime after fragmentation is sent into to raw material cabin through the first chapelet, the upper and lower material level meter be electrically connected to the PLC Controlling System is housed at the raw material cabin outer wall, control the thin piece amount of unslaked lime in raw material cabin, when the discharge of pulse dust collector prevention feed bin Air was housed at the raw material cabin top, dust was excessive, was referred to as the second environmental protection treatment;
3), the thin piece of the unslaked lime in raw material cabin is controlled and sent into successively the first screw feeder, spiral meter electronics, three grades of digestive organs by the first slide valve, in three grades of digestive organs, add water and digest 10 ~ 15min, below three grades of digestive organ upper cover air outlets, be provided with three groups of shower nozzles, spray the three horizontal face walls in road, blocking-up unslaked lime produces in the digestion process a large amount of steam, flour dust overflow, be referred to as the 3rd environmental protection treatment;
Part steam, the dust of 4), from the horizontal face wall of three groups of shower nozzle ejections, overflowing enter cleaning apparatus through three grades of digestive organ upper cover air outlets---fly-ash separator, by variable valve, flow, take into account the controls such as magnetic valve, make dust and steam enter the cleaning apparatus water tank by dust gathering arrester and cleaning shaft, finally from venting port, Purge gas is discharged; Dust removal efficiency reaches more than 99%, and dust removing effects can reach every cube of dustiness of venting port and be no more than 30 milligrams, is referred to as Fourth Ring and protects processing;
5) by the white lime digested in three grades of digestive organs in step 3, its water content<1.5%, send into the second chapelet by the second spiral pusher, then send into powder separating machine, adopts secondary sorting, three grades of sortings, is meal by material " is divided into three "---d
150 μ m, middle powder---60 μ m ~ 150 μ m, fine powder---d<60 μ m, select component efficiency to reach more than 92%;
Described environment-friendly type lime slaking and technology of the package, it is characterized in that: by the powder of the different grades after sorting in step 5, respectively through the triple helical stock pusher, the 4th screw feeder is sent into the 3rd chapelet, the 4th chapelet, the 3rd chapelet, the 4th chapelet all with pulse dust collector and with the PLC Controlling System, be electrically connected to upper, lower level gage is convenient to control inventory, the 3rd chapelet, the 4th chapelet is sent powder into the first finished bin, the second finished bin, the first finished bin, the second finished bin discharge port is respectively by the second slide valve, the 3rd slide valve control transports material to packing machine and carries out packaging and warehousing.
Advantage of the present invention is:
Technological design of the present invention is reasonable, by operation sections different in the lime slaking process, carrying out environmental protection treatment---sack cleaner, pulse dust collector, shower nozzle water curtain are processed, cleaning apparatus totally four processing of three grades of digestive organ upper cover air outlets, guaranteed that the hot steam produced in the lime course of processing and the processing efficiency of dust reach more than 99%, solved the problem of environmental pollution that lime slaking is produced; In addition, the packing of product after lime slaking is also with dedusting structure, and technological process does not have the environmental protection dead point, and whole flow process is controlled by PLC, has reduced hand labor intensity, has improved production efficiency.
The accompanying drawing explanation:
Fig. 1 is the process flow sheet of invention.
Mechanical processing flow chart in Figure 2 of the present invention, the figure: 1 - buffer tank, 2 - bag filter, 3 - uniform material trolley, 4 - crushing machines, 5 - first bucket elevator, 6 - raw materials warehouse, 7 - pulse dust collector, 8 - the first gate valve, 9 - first auger, 10 - spiral meter, 11 - three digester, 12 - the first two auger, 13 - second bucket elevator, 14 - separator, 15 - the third auger 16 - the third bucket elevators, and 17 - the first finished positions, and 18 - the fourth auger, 19 - fourth bucket elevators, and 20 - second finished products warehouse, 21 - packer, 22 - dust removal device, 23 - second gate valve, 24 - the third gate valve,, A-solenoid valves,, B-meter,, C-electric control valve,, D-level meter on,, E-lower level meter.
Embodiment:
Referring to Fig. 1:
Environment-friendly type lime slaking and technology of the package, is characterized in that, specifically comprises the following steps:
1), adopt conveyor to send into surge tank unslaked lime, through the surge tank discharge port fall into material conveying trolley with on average per hour the amount of 1 ~ 30 ton unslaked lime is inputted to fine crusher equably, through fine crusher, the unslaked lime of bulk is broken into to the thin piece of 2 ~ 5mm size, the dust produced in shattering process, by surge tank upper cover pipeline and refining dolly tail end upper pipe, enter sack cleaner and stoped flour dust overflow, be referred to as the first environmental protection treatment;
2), the thin piece of the unslaked lime after fragmentation is sent into to raw material cabin through the first chapelet, the upper and lower material level meter be electrically connected to the PLC Controlling System is housed at the raw material cabin outer wall, control the thin piece amount of unslaked lime in raw material cabin, when the discharge of pulse dust collector prevention feed bin Air was housed at the raw material cabin top, dust was excessive, was referred to as the second environmental protection treatment;
3), the thin piece of the unslaked lime in raw material cabin is controlled and sent into successively the first screw feeder, spiral meter electronics, three grades of digestive organs by the first slide valve, in three grades of digestive organs, add water and digest 10 ~ 15min, below three grades of digestive organ upper cover air outlets, be provided with three groups of shower nozzles, spray the three horizontal face walls in road, blocking-up unslaked lime produces in the digestion process a large amount of steam, flour dust overflow, be referred to as the 3rd environmental protection treatment;
Part steam, the dust of 4), from the horizontal face wall of three groups of shower nozzle ejections, overflowing enter cleaning apparatus through three grades of digestive organ upper cover air outlets---fly-ash separator, by variable valve, flow, take into account the controls such as magnetic valve, make dust and steam enter the cleaning apparatus water tank by dust gathering arrester and cleaning shaft, finally from venting port, Purge gas is discharged; Dust removal efficiency reaches more than 99%, and dust removing effects can reach every cube of dustiness of venting port and be no more than 30 milligrams, is referred to as Fourth Ring and protects processing;
5) by the white lime digested in three grades of digestive organs in step 3, its water content<1.5%, send into the second chapelet by the second spiral pusher, then send into powder separating machine, adopts secondary sorting, three grades of sortings, is meal by material " is divided into three "---d
150 μ m, middle powder---60 μ m ~ 150 μ m, fine powder---d<60 μ m, select component efficiency to reach more than 92%;
Powder by the different grades after sorting in step 5, respectively through the triple helical stock pusher, the 4th screw feeder is sent into the 3rd chapelet, the 4th chapelet, the 3rd chapelet, the 4th chapelet all with pulse dust collector and with the PLC Controlling System, be electrically connected to upper, lower level gage is convenient to control inventory, the 3rd chapelet, the 4th chapelet is sent powder into the first finished bin, the second finished bin, the first finished bin, the second finished bin discharge port is respectively by the second slide valve, the 3rd slide valve control transports material to packing machine and carries out packaging and warehousing.
Concrete working method is as follows:
Unslaked lime (CaO) by conveyor send into surge tank refining dolly by average per hour the amount of 1 ~ 30 ton unslaked lime is inputted to fine crusher equably
(4)Fine crusher is broken into the unslaked lime of bulk the thin piece of 3mm size.The dust produced in shattering process, enter sack cleaner by surge tank upper cover pipeline and refining dolly tail end upper pipe and stoped flour dust overflow (first environmental protection treatment).
Microlith ash after fragmentation enters to be carried machine by the bucket type liter and sends into raw material cabin, and upper and lower material level meter is housed on raw material cabin, and its can be delivered instruction to the PLC Controlling System and control, in the situation that material is full or expect all can send signal not.Pulse dust collector is equipped with at top at feed bin, and its effect is dust excessive (second environmental protection treatment) while stoping the feed bin Air to be discharged.
Lime is controlled and is entered screw feeder by the electric brake plate valve, then enters the spiral meter electronics, enters three grades of digestive organs by the amount of lime per hour needed, and adds in proportion water and digests.At first pass through the spiral propeller of the first step, required lime is sent in the one-level slaking silos, a large amount of hot steams and the dust adverse current that stop unslaked lime and water Contact to produce enter the tolerance range that spiral electronics feed claims to affect transducing signal.By multiple adjustment mode (stopping reprint etc. as frequency transformer, blanking), can control the lime slaking process and reach 8 ~ 12 minutes in three grades of dry powder digestive organ cabins, unslaked lime is fully digested.Unique design makes the amount of heat produced in the unslaked lime reaction process in the utilization of digestive organ internal conversion, promotes inner quicklime slaking material temperature, is conducive to unslaked lime and fully digests.In digestive organ upper cover air outlet, three channel showerheads are arranged, the ejection three horizontal face walls in road, blocking-up unslaked lime produces in the digestion process a large amount of steam, flour dust overflow, the dust that makes to enter next procedure reduces (the 3rd road environmental protection treatment).
Part steam, the dust of from the horizontal face wall of three groups of shower nozzle ejections, overflowing enter cleaning apparatus through three grades of digestive organ upper cover air outlets---fly-ash separator, its effect is that unslaked lime produces in three grades of digestive organ digestive processes a large amount of dust and steam enters the cleaning apparatus water tank by dust gathering arrester and cleaning shaft, dust vapor is filtered through in water, after dust vapor is processed fully, finally from venting port, Purge gas is discharged.In processing the dust vapor process, water in the fly-ash separator water tank becomes the warm sludge pulp-water by the absorption dust vapor, then by the high pressure slurry pump of fly-ash separator, high temperature mud water is squeezed into to waterpipe, recycle is in the lime slaking water of burnt lime digester, and his dust removal efficiency reaches more than 99%.Dust removing effects can reach every cube of dustiness of venting port and be no more than 30 milligrams of (national standards: every cubic metre of dustiness<150 milligram), realized that finally energy efficiency has solved the problem of environmental pollution of flying dust all over the sky, above-mentioned Wei Di tetra-road environmental protection treatment.
Digested white lime (Ca(OH)
2) (water content<1.5%) enter spiral pusher and send into chapelet and send into powder separating machine again; Can select the efficient three composition dividing powder separating machine of T-sepax, adopt aviation aerodynamics analysis method, adopting secondary sorting, three grades of sortings, can be meal (d>150 μ m), middle powder (60 μ m ~ 150 μ m), fine powder (d<60 μ m) by material " is divided into three ".
The group particle that the pre-separation of one-level stepped zone goes out in powder mix is collected in the meal heap; The secondary stepped zone is the Accurate Classification zone, completes in the annular region that turning vane and straight cage-type rotor form, and has got rid of the interference of thick because pre-separation goes out coarse particle, and therefore, the classification tolerance range is high, selects component efficiency to reach more than 92%.The powder of the different grades after sorting, enter respectively screw feeder and enter chapelet and enter feed bin, controlled and entered packing machine and carry out packaging and warehousing by the electric brake plate valve.
Claims (2)
1. an environment-friendly type lime slaking and technology of the package, is characterized in that, specifically comprises the following steps:
1), adopt conveyor to send into surge tank unslaked lime, through the surge tank discharge port fall into material conveying trolley with on average per hour the amount of 1 ~ 30 ton unslaked lime is inputted to fine crusher equably, through fine crusher, the unslaked lime of bulk is broken into to the thin piece of 2 ~ 5mm size, the dust produced in shattering process, by surge tank upper cover pipeline and refining dolly tail end upper pipe, enter sack cleaner and stoped flour dust overflow, be referred to as the first environmental protection treatment;
2), the thin piece of the unslaked lime after fragmentation is sent into to raw material cabin through the first chapelet, the upper and lower material level meter be electrically connected to the PLC Controlling System is housed at the raw material cabin outer wall, control the thin piece amount of unslaked lime in raw material cabin, when the discharge of pulse dust collector prevention feed bin Air was housed at the raw material cabin top, dust was excessive, was referred to as the second environmental protection treatment;
3), the thin piece of the unslaked lime in raw material cabin is controlled and sent into successively the first screw feeder, spiral meter electronics, three grades of digestive organs by the first slide valve, in three grades of digestive organs, add water and digest 10 ~ 15min, below three grades of digestive organ upper cover air outlets, be provided with three groups of shower nozzles, spray the three horizontal face walls in road, blocking-up unslaked lime produces in the digestion process a large amount of steam, flour dust overflow, be referred to as the 3rd environmental protection treatment;
Part steam, the dust of 4), from the horizontal face wall of three groups of shower nozzle ejections, overflowing enter cleaning apparatus through three grades of digestive organ upper cover air outlets---fly-ash separator, by variable valve, flow, take into account the controls such as magnetic valve, make dust and steam enter the cleaning apparatus water tank by dust gathering arrester and cleaning shaft, finally from venting port, Purge gas is discharged; Dust removal efficiency reaches more than 99%, and dust removing effects can reach every cube of dustiness of venting port and be no more than 30 milligrams, is referred to as Fourth Ring and protects processing;
5) by the white lime digested in three grades of digestive organs in step 3, its water content<1.5%, by the second spiral pusher, send into the second chapelet, send into again powder separating machine, adopt secondary sorting, three grades of sortings, by material " is divided into three ", be meal---d > 150 μ m, middle powder---60 μ m ~ 150 μ m, fine powder---d<60 μ m, select component efficiency to reach more than 92%.
2. environment-friendly type lime slaking according to claim 1 and technology of the package, it is characterized in that: by the powder of the different grades after sorting in step 5, respectively through the triple helical stock pusher, the 4th screw feeder is sent into the 3rd chapelet, the 4th chapelet, the 3rd chapelet, the 4th chapelet all with pulse dust collector and with the PLC Controlling System, be electrically connected to upper, lower level gage is convenient to control inventory, the 3rd chapelet, the 4th chapelet is sent powder into the first finished bin, the second finished bin, the first finished bin, the second finished bin discharge port is respectively by the second slide valve, the 3rd slide valve control transports material to packing machine and carries out packaging and warehousing.
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Cited By (7)
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| CN104496204A (en) * | 2014-12-25 | 2015-04-08 | 岳俊峰 | Energy-saving high-performance dry-process calcium hydroxide production line |
| CN104609745A (en) * | 2015-01-21 | 2015-05-13 | 南宁苏格尔科技有限公司 | Production control method of lime milk for preparing sugar |
| CN106045339A (en) * | 2016-06-01 | 2016-10-26 | 中冶长天国际工程有限责任公司 | Quick lime digestion, mixing and dust removal technology and device |
| CN106630689A (en) * | 2016-12-24 | 2017-05-10 | 建德市全新钙业有限公司 | Preparation method of building paint grade ash calcium powder |
| CN109704601A (en) * | 2019-02-15 | 2019-05-03 | 四川和临科技发展有限公司 | A kind of lime slaking technology for the production of nanoscale calcium hydroxide |
| CN111995263A (en) * | 2020-07-20 | 2020-11-27 | 建德华明科技有限公司 | Preparation method for producing precipitated calcium carbonate by dry-method digestion of calcium oxide |
| CN112374775A (en) * | 2020-12-08 | 2021-02-19 | 襄阳聚曐矿业有限公司 | Quick lime efficient digestion device and digestion method |
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| CN109704601A (en) * | 2019-02-15 | 2019-05-03 | 四川和临科技发展有限公司 | A kind of lime slaking technology for the production of nanoscale calcium hydroxide |
| CN109704601B (en) * | 2019-02-15 | 2021-03-26 | 四川和临科技发展有限公司 | Lime slaking process for producing nano-scale calcium hydroxide |
| CN111995263A (en) * | 2020-07-20 | 2020-11-27 | 建德华明科技有限公司 | Preparation method for producing precipitated calcium carbonate by dry-method digestion of calcium oxide |
| CN112374775A (en) * | 2020-12-08 | 2021-02-19 | 襄阳聚曐矿业有限公司 | Quick lime efficient digestion device and digestion method |
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