CN115385587A - Preparation process and preparation device of high-purity calcium hydroxide - Google Patents
Preparation process and preparation device of high-purity calcium hydroxide Download PDFInfo
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- CN115385587A CN115385587A CN202211123234.6A CN202211123234A CN115385587A CN 115385587 A CN115385587 A CN 115385587A CN 202211123234 A CN202211123234 A CN 202211123234A CN 115385587 A CN115385587 A CN 115385587A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/02—Lime
- C04B2/04—Slaking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/08—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers
- B02C18/10—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers with drive arranged above container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/22—Crushing mills with screw-shaped crushing means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/02—Lime
- C04B2/04—Slaking
- C04B2/08—Devices therefor
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Abstract
The invention discloses a preparation process and a preparation device of high-purity calcium hydroxide, wherein the process comprises the steps of crushing a blocky raw material, digesting calcium oxide, reacting with water and winnowing to obtain a finished product; the device comprises a feeding unit, a crushing unit, a winnowing tower and a storage tower; the bottom of the storage tower is provided with a discharging pipe; the upper part of the winnowing tower is a grinding chamber, the lower part of the winnowing tower is a winnowing chamber, a winnowing machine is arranged on one side of the inner part of the winnowing chamber, and an air inlet with a dustproof unit is arranged on the outer side of the winnowing chamber; the crushing unit and the winnowing tower are respectively provided with corresponding air inlet units. The device provided by the invention is additionally provided with the crushing unit and the grinding chamber to crush and grind large particles or caked calcium hydroxide, so that the calcium hydroxide is fully ground into fine particles, the calcium hydroxide cannot be discarded as impurities through winnowing, the waste of resources is reduced, and the economic loss is reduced; the method has the advantages of effectively treating large particles or caked calcium hydroxide, preventing the calcium hydroxide from being discarded as impurities, reducing resource waste and reducing economic loss.
Description
Technical Field
The invention relates to the field of preparation of high-purity calcium hydroxide, in particular to a preparation process and a preparation device of the high-purity calcium hydroxide.
Background
Calcium hydroxide is a white powdery solid with a chemical formula of Ca (OH) 2 commonly called hydrated lime and slaked lime, an aqueous solution is called clear limewater, the calcium hydroxide has the general property of alkali and is strong alkali, and the calcium hydroxide is binary strong alkali and only slightly soluble in water; calcium hydroxide has wide application in industry, for example, industrial calcium hydroxide is widely used in the fields of sewage treatment, acidic water neutralization treatment, flue gas desulfurization, waste incineration and the like; the food-grade calcium hydroxide is widely used in the fields of synthesis of food additives, calcium stearate, calcium naphthenate, calcium lactate and calcium citrate and synthesis of other high-grade organic chemical industry; the high-quality industrial-grade calcium hydroxide is used in the industries of novel coatings, chemical synthesis, leather manufacturing and the like.
The domestic calcium hydroxide is mainly produced by a quicklime slaking process which is divided into a dry process and a wet process, wherein the quicklime calcium oxide is prepared by calcining limestone at high temperature, and the quicklime calcium oxide is crushed into fine particles and then undergoes a biochemical reaction with water in a certain proportion in a slaker device to prepare the calcium hydroxide.
Actual sampling investigation shows that although calcium hydroxide products on the market are many, the calcium hydroxide products have different quality, silicon impurities existing in production of many factories are difficult to completely remove, and partial calcium oxide cannot be completely eliminated, so that the defects of low product content, more impurities, high acid insoluble substances, low whiteness, large powder color difference and the like are caused, and the quality of the calcium hydroxide products cannot meet the market demand;
and because the lower the particle size of the calcium hydroxide is due to its own properties, the more easily the calcium hydroxide is aggregated with impurities into large particles, and in order to ensure the production of high-purity calcium hydroxide, it is necessary to screen out the large particles and even the agglomerated calcium hydroxide containing impurities, and therefore, a special air separator is required.
The winnowing machine used in a factory at present is simple in structure, a fan is used for blowing and spraying falling calcium hydroxide coarse materials, calcium hydroxide powder meeting conditions (small in particle, light in weight and free of impurities) can be blown and sprayed into corresponding storage equipment to be collected and stored, impurities which do not meet the requirements or large calcium hydroxide particles containing impurities and the like cannot be blown and sprayed into the storage equipment, and therefore the calcium hydroxide powder directly falls into a waste bin to serve as impurities to wait for centralized treatment;
however, many large-particle or agglomerated calcium hydroxides only contain a small amount of impurities or even some of the large-particle or agglomerated calcium hydroxides do not contain impurities, and the large-particle or agglomerated calcium hydroxides cannot be winnowed due to large volume of the calcium hydroxides, so that the calcium hydroxides are discarded as impurities, and therefore, the waste of resources is great, and unnecessary economic loss is caused;
moreover, the existing winnowing machine only has a winnowing function, and in fact, the calcium hydroxide coarse material which is put into the winnowing machine often has uneven particles due to the process and other reasons, and the winnowing machine cannot crush large-particle calcium hydroxide, so that the calcium hydroxide can only be discharged as impurities.
In conclusion, the winnowing machine used in the existing factory has the problems that the structure is simple, large particles or caked calcium hydroxide cannot be effectively treated, the large particles or caked calcium hydroxide can only be discarded as impurities, the resource waste is caused, and the economic loss is caused.
Disclosure of Invention
The invention aims to provide a preparation process and a preparation device of high-purity calcium hydroxide. The method has the advantages of effectively treating large particles or caked calcium hydroxide, preventing the calcium hydroxide from being discarded as impurities, reducing resource waste and reducing economic loss.
The technical scheme of the invention is as follows: the preparation process of high-purity calcium hydroxide comprises the following steps:
A. crushing the blocky raw materials: crushing a calcium oxide block raw material;
B. calcium oxide digestion: digesting the calcium oxide crushed aggregates until the calcium oxide is completely decomposed;
C. water distribution reaction: adding a corresponding amount of water according to the specific gravity of the calcium oxide, and fully mixing the calcium oxide and the water and reacting to obtain a calcium hydroxide coarse material;
D. winnowing a finished product: and conveying the calcium hydroxide coarse material into a winnowing machine for winnowing to obtain the finished product calcium hydroxide.
The high-purity calcium hydroxide preparation device comprises a feeding unit, a crushing unit, a winnowing tower and a storage tower which are connected in sequence; the feeding unit is positioned on the storage tower, the winnowing tower is positioned on the other side of the storage tower, and the crushing unit is positioned above the storage tower; the top of the feeding unit is connected with the top of the crushing unit, and the bottom of the crushing unit is connected with the top of the air separation tower through the material conveying unit; the bottom of one side of the winnowing tower, which is close to the storage tower, is connected with the storage tower through a winnowing discharging pipe; a discharge pipe is arranged at the bottom of the front side of the storage tower; the upper part of the air separation tower is a grinding chamber, the lower part of the air separation tower is an air separation chamber, and an air separator is arranged on one side, far away from the storage tower, in the air separation chamber; an air inlet with a dustproof unit is arranged outside the winnowing chamber and corresponds to the winnowing machine; the crushing unit and the winnowing tower are respectively provided with corresponding air inlet units.
In the high-purity calcium hydroxide preparation device, the feeding unit comprises a feeding box, a first conveyor vertically arranged on the feeding box, and a second conveyor arranged above the storage tower and corresponding to the first conveyor; the top of the first conveyor is connected with the bottom of the second conveyor through a first conveying pipe, and the top of the second conveyor is connected with the top of the crushing unit through a second conveying pipe; a feeding hopper with an openable sealing cover is arranged above the left side of the feeding box; the first conveying pipe and the second conveying pipe are obliquely arranged.
In the above high-purity calcium hydroxide preparation apparatus, the crushing unit comprises a crushing chamber, a crushing feeding chamber arranged at the top of the crushing chamber and connected to the feeding unit, a crushing motor arranged at the top of the crushing feeding chamber, and a rotating shaft arranged in the crushing chamber and connected to the crushing motor; the rotating shaft is respectively provided with a centrifugal fan blade positioned in the crushing feeding chamber and a plurality of crushing blades positioned in the crushing chamber; the bottom of the crushing chamber shrinks towards the middle in a funnel shape, and a crushing discharging pipe is arranged below the middle part of the crushing chamber; the air inlet unit is positioned on the right side of the crushing feeding chamber and connected with the crushing feeding chamber.
In the above high-purity calcium hydroxide preparation apparatus, a plurality of fastening sleeves are disposed on one side of the crushing chamber close to the air separation tower; the material conveying unit comprises a third conveyer which is obliquely arranged and a third conveying pipe which is vertically and flexibly arranged; the upper part of the lowest end of the third conveyor is connected with the crushing discharge pipe, and the highest end of the third conveyor is connected with the bottom of the third conveying pipe; the third conveying pipe is detachably arranged in the fastening sleeve, and the top of the third conveying pipe is connected with the top of the winnowing tower.
In the high-purity calcium hydroxide preparation apparatus, a grinding feed chamber is arranged at the top of the grinding chamber, a collecting blanking plate, two groups of grinding rollers arranged below the collecting blanking plate, and a grinding motor located outside the grinding chamber and connected to the grinding rollers are arranged in the grinding chamber; the bottom of the air separation chamber is arranged in a funnel shape and shrinks towards the middle, and a slag discharge pipe with a valve is arranged below the middle part of the air separation chamber; a filtering screen cover sleeved at an inlet of the air separation discharge pipe is arranged in the air separation chamber; and the bottom of the grinding chamber is provided with a channel connected with the air separation chamber.
In the high-purity calcium hydroxide preparation device, a driving gear and a belt pulley are sleeved on an output shaft of the grinding motor from left to right; a rotating shaft is arranged at the end, close to the grinding motor, of the grinding roller, and a driven gear which is meshed with the driving gear to rotate is sleeved on the rotating shaft; a driven shaft corresponding to the output shaft is arranged at the lower grinding roller, and a driving gear and a belt pulley are sleeved on the driven shaft; the upper belt pulley and the lower belt pulley are connected through a belt.
In the above high-purity calcium hydroxide preparation apparatus, the storage tower includes a storage chamber, a gas spraying unit provided with a top of the storage chamber, and a discharge pipe provided outside the storage chamber; the bottom of the storage chamber is inclined and is inclined towards the discharge pipe; the bottom of the storage chamber is provided with a one-way exhaust unit communicated with the bottom of the storage chamber, and the one-way exhaust unit is provided with filter cloth; the storage tower is internally provided with gas conveying pipes positioned at two sides of the storage chamber and a gas outlet pipe positioned above the filter cloth and communicated with the storage chamber; the gas pipe is respectively communicated with the gas spraying unit and the gas outlet pipe, and a plurality of gas outlet holes corresponding to the filter cloth are uniformly distributed on the gas outlet pipe.
In the above high-purity calcium hydroxide preparation apparatus, the discharge tube includes an elbow tube connected to the storage chamber, a telescopic tube disposed below the elbow tube, and a conical discharge barrel disposed at the bottom of the telescopic tube; and a switch valve is arranged between the bent pipe and the telescopic pipe.
In the above high-purity calcium hydroxide preparation apparatus, the air inlet unit includes an air inlet chamber, an exhaust fan disposed in the air inlet chamber, and an air inlet and an air outlet pipe disposed at two sides of the air inlet chamber, respectively; the air inlet chamber is internally provided with a dust guard plate positioned at the air inlet and a filter screen plate positioned at the air outlet pipe.
In the high-purity calcium hydroxide preparation apparatus, the first conveyor, the second conveyor and the third conveyor are all screw conveyors.
Compared with the prior art, the invention provides a process for preparing high-purity calcium hydroxide and a corresponding preparation device, the device provided by the invention is used for crushing and grinding large particles or caked calcium hydroxide by additionally arranging a crushing unit and a grinding chamber with a grinding effect before air separation, so that the large particles or caked calcium hydroxide can be fully ground into fine particles, then the fine particles of calcium hydroxide are air separated, the large particles or caked calcium hydroxide can not be discarded as impurities through air separation, the waste of resources is reduced, and the economic loss is reduced;
therefore, the method has the advantages of effectively treating large particles or agglomerated calcium hydroxide, preventing the calcium hydroxide from being discarded as impurities, reducing resource waste and reducing economic loss.
Further, the feeding unit is used for feeding, the first conveyor and the second conveyor can grind calcium hydroxide particles while carrying out spiral feeding, and the work load of the crushing blade and the grinding roller is reduced;
by additionally arranging the centrifugal fan blades and the bulk material fan, the input raw materials are scattered and thrown to the periphery, so that the raw materials can be scattered and fall down, and accumulation is prevented;
by arranging a plurality of grinding rollers and arranging a collecting blanking plate in a matched manner, the materials can be ensured to be collected and fall between the grinding rollers, and the grinding is more sufficient;
through adding dustproof equipment such as establishing dustproof unit in air intake department, prevent effectively that external impurity from getting into polluting calcium hydrate in the device, ensure the purity of product.
Drawings
FIG. 1 is a flow chart of the manufacturing process of the present invention
FIG. 2 is a schematic view of the construction of a production apparatus of the present invention;
FIG. 3 is a schematic view of the structure of the feeding unit of the present invention;
FIG. 4 is a schematic view of the construction of the crushing chamber of the present invention;
fig. 5 is a schematic structural view of the air separation tower of the present invention;
FIG. 6 is a schematic diagram of the storage tower of the present invention;
FIG. 7 is an enlarged view at A in FIG. 2;
FIG. 8 is an enlarged view at B in FIG. 2;
fig. 9 is an enlarged view at C in fig. 5.
The symbols in the drawings are: 1-feeding unit, 11-feeding box, 12-feeding hopper, 13-first conveyor, 14-second conveyor, 151-first conveying pipe, 152-second conveying pipe, 2-crushing unit, 21-crushing feeding chamber, 22-crushing motor, 23-rotating shaft, 24-crushing blade, 25-centrifugal fan blade, 26-crushing discharging pipe, 27-fastening sleeve, 3-grinding chamber, 31-grinding feeding chamber, 311-mounting rod, 312-bulk material fan, 32-gathering blanking plate, 33-grinding roller, 331-rotating shaft, 332-driven gear, 341-belt pulley, 342-belt, 4-winnowing chamber, 41-winnowing machine, 42-dustproof unit, 43-filtering screen, 44-discharging pipe, 45-slag discharging pipe, 5-storage tower, 51-storage chamber, 511-one-way exhaust unit, 52-gas spraying unit, 521-breathable screen plate, 522-gas pipe, 523-air outlet pipe, 53-bent pipe, 54-open-close valve, 55-56-conical discharging barrel, 61-conical discharging barrel, 62-conveying pipe, 7-one-way exhaust unit, 52-gas spraying unit, 521-breathable screen plate, 523-air inlet pipe, 53-telescopic pipe, and 71-dust outlet pipe.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Examples are given. The preparation process of high-purity calcium hydroxide has the flow shown in figure 1 and comprises the following steps:
A. crushing the blocky raw materials: crushing the calcium oxide blocky raw material;
B. calcium oxide digestion: digesting the calcium oxide crushed aggregates until the calcium oxide is completely decomposed;
C. water distribution reaction: adding a corresponding amount of water according to the specific gravity of the calcium oxide, and fully mixing the calcium oxide and the water and reacting to obtain a calcium hydroxide coarse material;
D. winnowing a finished product: and conveying the calcium hydroxide coarse material into a winnowing machine for winnowing to obtain the finished product calcium hydroxide.
The high-purity calcium hydroxide preparation device has a structure as shown in figure 2, and comprises a feeding unit 1, a crushing unit 2, a winnowing tower and a storage tower 5 which are connected in sequence; the feeding unit 1 and the winnowing tower are respectively arranged at the left side and the right side of the storage tower 5, and the crushing unit 2 is arranged on the storage tower 5 through a bracket; the top of the feeding unit 1 is communicated with the top of the crushing unit 2, and the bottom of the crushing unit 2 is communicated with the top of the air separation tower through a material conveying unit which is obliquely arranged; the upper part of the air separation tower is a grinding chamber 3, the lower part of the air separation tower is an air separation chamber 4, and the left side of the air separation chamber 4 is communicated with a storage tower 5 through an air separation discharge pipe 44 which is big at the left and small at the right and is obliquely arranged towards the storage tower 5; a discharging pipe is arranged at the bottom of the front side of the storage tower 5 for discharging; a common winnowing machine 41 is arranged at the right side in the winnowing chamber 4, and the winnowing machine 41 is a blowing winnowing main machine; the right side of the air separation chamber 4 is provided with an air inlet with a dustproof unit 42; air inlet units are arranged above the crushing unit 2 and the winnowing tower.
As shown in fig. 3, the feeding unit 1 includes a feeding box 11, a first conveyor 13 installed above the right portion of the feeding box 11, and a second conveyor 14 installed above the left portion of the storage tower 5 and connected to the first conveyor 13; the top of the first conveyor 13 is connected with the bottom of the second conveyor 14 through a first conveying pipe 151, and the top of the second conveyor 14 is connected with the top of the crushing unit 2 through a second conveying pipe 152; a feeding hopper 12 is arranged above the left side of the feeding box 11, and a sealing cover capable of being opened and closed in a rotating mode is arranged on the feeding hopper 12 to prevent impurities such as dust from entering; delivery pipe 151 and No. two delivery pipes 152 all incline to set up, make things convenient for the blanking.
As shown in fig. 4, the crushing unit 2 comprises a crushing chamber, a crushing feed chamber 21 arranged at the top of the crushing chamber, a crushing motor 22 arranged at the top of the crushing feed chamber 21, and a rotating shaft 23 arranged in the crushing chamber and connected with the crushing motor 22, wherein the crushing motor 22 drives the rotating shaft 23 to rotate through a coupling; the rotating shaft 23 is respectively provided with a centrifugal fan blade 25 and a crushing blade 24, the centrifugal fan blade 25 is arranged in the crushing feeding chamber 21 to facilitate throwing out of the materials, and the crushing blade 24 is arranged in the crushing chamber to crush the caked calcium hydroxide; the bottom of the crushing chamber shrinks towards the middle in a funnel shape, so that blanking is convenient, and a crushing discharging pipe 26 is arranged below the middle of the crushing chamber; the air inlet unit is positioned at the right side of the crushing feeding chamber 21, is connected with the crushing feeding chamber 21 and supplies air into the crushing chamber.
A plurality of adjustable fastening sleeves 27 are fixed on the right side of the crushing chamber; the material conveying unit consists of a third conveyer 61 which is obliquely arranged and a third conveying pipe 62 which is vertically arranged; the upper part of the lowest end of the third conveyor 61 is connected with the crushing and discharging pipe 26, and the highest end is connected with the bottom of the third conveying pipe 62; the third conveying pipe 62 is detachably arranged in the fastening sleeve 27, and the top of the third conveying pipe is connected with the top of the winnowing tower.
The first conveyor 13, the second conveyor 14 and the third conveyor 61 are all spiral conveyors, and different specifications are selected according to actual needs.
As shown in fig. 5, a grinding feeding chamber 31 is set on the top of the grinding chamber 3, and the grinding feeding chamber is internally provided with a collecting blanking plate 32, two sets of grinding rollers 33 arranged below the collecting blanking plate 32 and a grinding motor located outside the grinding chamber 3, wherein the grinding motor drives the grinding rollers 33 to rotate; the bottom of the winnowing chamber 4 is arranged in a funnel shape and shrinks towards the middle, a slag discharge pipe 45 is arranged below the middle, the slag discharge pipe 45 is provided with a valve which can be opened and closed, and slag discharge operation is carried out as required;
the winnowing chamber 4 is internally provided with a filter screen 43 which is sleeved at an inlet of a winnowing discharging pipe 44 to prevent impurities from being blown into the storage tower 5; the bottom of the grinding chamber 3 is provided with a channel connected with the winnowing chamber 4 for blanking.
The installation pole 311 that is equipped with the level setting in the grinding feed chamber 31, be equipped with the lantern ring in the middle of the installation pole 311, installation pole 311 below is equipped with the bulk cargo fan 312 that is located grinding chamber 3, and bulk cargo fan 312 then links to each other with the lantern ring through the connecting axle, and bulk cargo fan 312 is rotatory simultaneously with the material toward dispersion all around under the wind-force effect, prevents to pile up.
Blanking holes with large upper parts and small lower parts are uniformly formed above the collecting blanking plates 32, and the discharge openings of the blanking holes correspond to the grinding positions between the grinding rollers 33, so that the raw materials falling on the collecting blanking plates 32 are collected and then fall between the grinding rollers 33 in a concentrated manner for grinding;
the grinding rollers 33 are divided into an upper group and a lower group, each group is provided with even numbers of rollers which are uniformly distributed, the pair at the middle is driven by a grinding motor to rotate, and other grinding rollers 33 are driven by common transmission structures such as transmission gears to rotate.
As shown in fig. 9, a driving gear and a belt pulley 341 are sleeved on the output shaft of the grinding motor from left to right; a rotating shaft 331 is arranged at the end of the grinding roller 33 close to the grinding motor, and a driven gear 332 which is meshed with the driving gear and rotates is sleeved on the rotating shaft 331; a driven shaft corresponding to the output shaft is arranged at the grinding roller 33 positioned below, and a driving gear and a belt pulley 341 are sleeved on the driven shaft; the upper and lower pulleys 341 are connected by a belt 342.
As shown in fig. 6, the storage tower 5 includes a storage chamber 51, a gas shower unit 52 located at the top of the storage chamber 51, and a discharge pipe installed at the front side of the storage chamber 51; the bottom of the storage chamber 51 is inclined and uniformly inclined towards the discharge pipe, so that the calcium hydroxide can be conveniently collected and discharged towards the discharge pipe; the bottom of the storage tower 5 is provided with a one-way exhaust unit 511 communicated with the bottom of the storage chamber 51, the one-way exhaust unit 511 is composed of a plurality of one-way exhaust valves, and the one-way exhaust unit 511 is provided with filter cloth which can prevent calcium hydroxide from running out while exhausting;
the storage tower 5 is also internally provided with air pipes 522 positioned at two sides of the storage chamber 51 and an air outlet pipe 523 positioned above the filter cloth and communicated with the storage chamber 51; the gas conveying pipe 522 is respectively communicated with the gas spraying unit 52 and the gas outlet pipe 523, and the gas outlet pipe 523 is provided with gas outlet holes corresponding to the filter cloth direction, so that the filter cloth can be blown and sprayed, and the blockage caused by the accumulation of calcium hydroxide is prevented;
similarly, the top of the gas spraying unit 52 is provided with a gas-permeable mesh plate 521 communicated with the outside for gas inlet; the gas spraying unit 52 may be a commercially available gas spraying device.
Referring to fig. 8, the discharge pipe includes an elbow 53 connected to the storage chamber 51, a telescopic pipe 55 disposed below the elbow 53, and a tapered discharge barrel 56 disposed at the bottom of the telescopic pipe 55; a switch valve 54 is arranged between the bent pipe 53 and the extension pipe 55; the telescopic pipe 55 is an elastic telescopic pipe, so that the telescopic pipe is convenient for workers to stretch and discharge.
As shown in fig. 7, the air intake unit includes an air intake chamber 7, an exhaust fan 71 disposed in the air intake chamber 7, and an air intake and an air outlet pipe respectively disposed at two sides of the air intake chamber 7; the air inlet chamber 7 is internally provided with a dust guard 72 positioned at an air inlet and a filter screen 73 positioned at an air outlet pipe.
The dustproof plate 72, the filter screen plate 73, the filter cloth, the filter screen 43 and the dustproof unit 42 are all common dustproof or filter equipment in the market, and the main function of the dustproof or filter equipment is to filter impurities.
The working principle of the invention is as follows: as shown in fig. 2-9, the primarily prepared crude calcium hydroxide is put into a feeding hopper 12 of a feeding unit 1, and a first conveyor 13 and a second conveyor 14 continuously and spirally convey the crude calcium hydroxide into a crushing unit 2;
after entering the crushing feeding chamber 21, the crude product is thrown outwards under the action of centrifugal fan blades 25 and then crushed into small particles by crushing blades 24;
the crushed semi-finished products are conveyed into the grinding feeding chamber 31 through a third conveyor 61 and a third conveying pipe 62, the semi-finished products are thrown around when a bulk material fan 312 rotates, and the materials fall on a collecting blanking plate 32 and fall between grinding rollers 33 after being collected;
the ground fine materials fall into the winnowing chamber 4 to be winnowed by the winnowing machine 41, qualified products enter the storage tower 5 through the winnowing discharge pipe 44 to be stored, and impurities which cannot pass through the winnowing are discharged through the slag discharge pipe 45;
when the product needs to be taken out, the product can be sprayed into the discharge pipe under the action of gas for discharging only by starting the gas spraying unit 52 and opening the switch valve 54.
Claims (10)
1. The preparation process of the high-purity calcium hydroxide is characterized by comprising the following steps:
A. crushing the blocky raw materials: crushing a calcium oxide block raw material;
B. calcium oxide digestion: digesting the calcium oxide crushed aggregates until the calcium oxide is completely decomposed;
C. water distribution reaction: adding a corresponding amount of water according to the specific gravity of the calcium oxide, and fully mixing the calcium oxide and the water and reacting to obtain a calcium hydroxide coarse material;
D. winnowing to obtain a finished product: and conveying the calcium hydroxide coarse material into a winnowing machine for winnowing to obtain the finished product calcium hydroxide.
2. The apparatus for preparing high-purity calcium hydroxide according to claim 1, wherein the apparatus comprises: comprises a feeding unit (1), a crushing unit (2), an air separation tower and a storage tower (5) which are connected in sequence; the feeding unit (1) is positioned on one side of the storage tower (5), the winnowing tower is positioned on the other side of the storage tower (5), and the crushing unit (2) is positioned above the storage tower (5); the top of the feeding unit (1) is connected with the top of the crushing unit (2), and the bottom of the crushing unit (2) is connected with the top of the air separation tower through the material conveying unit; the bottom of one side of the air separation tower, which is close to the storage tower (5), is connected with the storage tower (5) through an air separation discharging pipe (44); a discharge pipe is arranged at the bottom of the front side of the storage tower (5); the upper part of the air separation tower is provided with a grinding chamber (3), the lower part of the air separation tower is provided with an air separation chamber (4), and one side of the interior of the air separation chamber (4) far away from the storage tower (5) is provided with an air separator (41); an air inlet with a dustproof unit (42) is arranged at the outer side of the air separation chamber (4) and corresponds to the air separator (41); the crushing unit (2) and the air separation tower are respectively provided with corresponding air inlet units.
3. The apparatus for preparing high purity calcium hydroxide according to claim 2, characterized in that: the feeding unit (1) comprises a feeding box (11), a first conveyor (13) vertically arranged on the feeding box (11) and a second conveyor (14) arranged above the storage tower (5) and corresponding to the first conveyor (13); the top of the first conveyor (13) is connected with the bottom of the second conveyor (14) through a first conveying pipe (151), and the top of the second conveyor (14) is connected with the top of the crushing unit (2) through a second conveying pipe (152); a feeding hopper (12) with an openable sealing cover is arranged above the left side of the feeding box (11); the first conveying pipe (151) and the second conveying pipe (152) are obliquely arranged.
4. The apparatus for preparing high purity calcium hydroxide according to claim 2, characterized in that: the crushing unit (2) comprises a crushing chamber, a crushing feeding chamber (21) arranged at the top of the crushing chamber and connected with the feeding unit (1), a crushing motor (22) arranged at the top of the crushing feeding chamber (21) and a rotating shaft (23) arranged in the crushing chamber and connected with the crushing motor (22); the rotating shaft (23) is respectively provided with a centrifugal fan blade (25) positioned in the crushing feeding chamber (21) and a plurality of crushing blades (24) positioned in the crushing chamber; the bottom of the crushing chamber shrinks towards the middle in a funnel shape, and a crushing discharging pipe (26) is arranged below the middle part of the crushing chamber; the air inlet unit is positioned on the right side of the crushing feeding chamber (21) and is connected with the crushing feeding chamber (21).
5. The apparatus for preparing high purity calcium hydroxide according to claim 4, characterized in that: a plurality of fastening sleeves (27) are arranged on one side of the crushing chamber close to the air separation tower; the material conveying unit comprises a third conveyer (61) which is obliquely arranged and a third conveying pipe (62) which is vertically and flexibly arranged; the upper part of the lowest end of the third conveyor (61) is connected with the crushing discharge pipe (26), and the highest end of the third conveyor is connected with the bottom of the third conveying pipe (62); the third conveying pipe (62) is detachably arranged in the fastening sleeve (27), and the top of the third conveying pipe is connected with the top of the air separation tower.
6. The apparatus for preparing high purity calcium hydroxide according to claim 2, characterized in that: a grinding feeding chamber (31) is arranged at the top of the grinding chamber (3), a collecting blanking plate (32), two groups of grinding rollers (33) arranged below the collecting blanking plate (32) and a grinding motor which is positioned outside the grinding chamber (3) and connected with the grinding rollers (33) are arranged in the grinding chamber (3); the bottom of the winnowing chamber (4) is in a funnel shape and is contracted towards the middle, and a slag discharge pipe (45) with a valve is arranged below the middle part of the winnowing chamber (4); a filter screen (43) sleeved at the inlet of the air separation discharge pipe (44) is arranged in the air separation chamber (4); the bottom of the grinding chamber (3) is provided with a channel connected with the winnowing chamber (4).
7. The apparatus for preparing high purity calcium hydroxide according to claim 6, wherein: the output shaft of the grinding motor is sleeved with a driving gear and a belt pulley (341) from left to right; a rotating shaft (331) is arranged at the end, close to the grinding motor, of the grinding roller (33), and a driven gear (332) which is meshed with the driving gear to rotate is sleeved on the rotating shaft (331); a driven shaft corresponding to the output shaft is arranged at the position of the grinding roller (33) positioned below the grinding roller, and a driving gear and a belt pulley (341) are sleeved on the driven shaft; the upper and lower pulleys (341) are connected by a belt (342).
8. The apparatus for preparing high purity calcium hydroxide according to claim 2, characterized in that: the storage tower (5) comprises a storage chamber (51), a gas spraying unit (52) arranged at the top of the storage chamber (51) and a discharge pipe arranged outside the storage chamber (51); the bottom of the storage chamber (51) is inclined and is inclined towards the discharge pipe; the bottom of the storage tower (5) is provided with a one-way exhaust unit (511) communicated with the bottom of the storage chamber (51), and the one-way exhaust unit (511) is provided with filter cloth; the storage tower (5) is internally provided with air pipes (522) positioned at two sides of the storage chamber (51) and an air outlet pipe (523) positioned above the filter cloth and communicated with the storage chamber (51); the gas conveying pipe (522) is respectively communicated with the gas spraying unit (52) and the gas outlet pipe (523), and a plurality of gas outlet holes corresponding to the filter cloth are uniformly distributed on the gas outlet pipe (523).
9. The apparatus for preparing high purity calcium hydroxide according to claim 8, characterized in that: the discharge pipe comprises an elbow pipe (53) connected with the storage chamber (51), a telescopic pipe (55) arranged below the elbow pipe (53) and a conical discharge barrel (56) arranged at the bottom of the telescopic pipe (55); and a switch valve (54) is arranged between the bent pipe (53) and the telescopic pipe (55).
10. The apparatus for preparing high purity calcium hydroxide according to claim 2, characterized in that: the air inlet unit comprises an air inlet chamber (7), an exhaust fan (71) arranged in the air inlet chamber (7), and an air inlet and an air outlet pipe which are respectively arranged at two sides of the air inlet chamber (7); the air inlet chamber (7) is internally provided with a dust guard (72) positioned at an air inlet and a filter screen (73) positioned at an air outlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211123234.6A CN115385587A (en) | 2022-09-15 | 2022-09-15 | Preparation process and preparation device of high-purity calcium hydroxide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211123234.6A CN115385587A (en) | 2022-09-15 | 2022-09-15 | Preparation process and preparation device of high-purity calcium hydroxide |
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| Publication Number | Publication Date |
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| CN115385587A true CN115385587A (en) | 2022-11-25 |
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|---|---|---|---|
| CN202211123234.6A Pending CN115385587A (en) | 2022-09-15 | 2022-09-15 | Preparation process and preparation device of high-purity calcium hydroxide |
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Citations (5)
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|---|---|---|---|---|
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| KR200492037Y1 (en) * | 2020-03-12 | 2020-07-23 | 자이에너지운영 주식회사 | Intergrated manufacturing equipment of liquid calcium hydroxide |
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| CN113247934A (en) * | 2021-05-20 | 2021-08-13 | 江西福得利碳酸钙业有限责任公司 | Preparation process and equipment of high-purity calcium hydroxide |
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2022
- 2022-09-15 CN CN202211123234.6A patent/CN115385587A/en active Pending
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| WO2012080565A1 (en) * | 2010-12-13 | 2012-06-21 | Fractivator Oy | Method and apparatus for the preparation of finely divided calcium hydroxide |
| CN207981331U (en) * | 2017-12-27 | 2018-10-19 | 山东东山新驿煤矿有限公司 | A kind of rough coal mud crusher |
| KR200492037Y1 (en) * | 2020-03-12 | 2020-07-23 | 자이에너지운영 주식회사 | Intergrated manufacturing equipment of liquid calcium hydroxide |
| CN113019555A (en) * | 2021-03-09 | 2021-06-25 | 中科世纪联绿生态环境(北京)有限公司 | Grinding equipment for manufacturing ultrafine sand by using waste bricks and tiles |
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