CN212740760U - Novel production equipment for ultra-pure ultra-white large-sediment light calcium carbonate - Google Patents

Abstract

The utility model discloses a novel super pure ultrawhite heavy body light calcium production facility, including electric stove, digestion machine and carbonators, the electric stove pass through the bucket elevator with the digestion machine is connected, the digestion machine with the carbonators passes through the tube coupling. Superfine or superfine ground calcium carbonate powder is used as a raw material, and is subjected to continuous high-temperature electric burning modification through an electric burning furnace, so that the superfine or superfine ground calcium carbonate powder is decomposed into superfine or superfine calcium oxide powder and carbon dioxide, the obtained calcium oxide powder and water are mixed and digested in a digester, slurry obtained after digestion is introduced into a carbonization tower, and carbon dioxide is introduced for carbonization treatment. The method has high degree of combination with the existing equipment, realizes the production line-based continuous production, enriches the products of enterprises, and obtains the light calcium with higher purity and whiteness and better performance.

Description

Novel production equipment for ultra-pure ultra-white large-sediment light calcium carbonate

Technical Field

The utility model belongs to the technical field of light calcium production facility, especially, relate to a novel super pure super white heavy body light calcium production facility.

Background

Light calcium carbonate is one of important inorganic powder fillers, can be used as the filler in the industries of rubber, plastics, papermaking, paint, ink and the like, and is widely used in the production of organic synthesis, metallurgy, glass, asbestos and the like. In the light calcium carbonate industry of China, as people quickly lose consciousness with economic construction, the production capacity and the use demand are rapidly increased, but compared with the similar industry of foreign countries, the whole industry has larger differences in production scale, capacity, level and quality, the equipment energy consumption is high, the cost is high, the environmental pollution is serious, and the product application is limited.

At present, the traditional carbonization method is mainly adopted in the production method of light calcium carbonate in China, stone raw materials such as limestone and the like and white coal are mixed according to a certain proportion, then calcined into quick lime at high temperature through a lime kiln, and then the quick lime is subjected to water digestion, carbon dioxide carbonization, separation and refining, cooling, drying, crushing and sieving to obtain a finished product. The disadvantages are that: the traditional carbonization method mixes coal and stone raw materials and calcines at high temperature, on one hand, the energy consumption is high, the pollution is serious, the production efficiency is low, on the other hand, more impurities such as coal ash and slag are generated, the quality of light calcium carbonate is influenced, the purity and the whiteness are poor, and the application of the light calcium carbonate is limited.

Therefore, a method for producing light calcium carbonate, which is energy-saving, environment-friendly, high in production efficiency, low in cost and capable of remarkably improving the quality and application space of light calcium carbonate products, is urgently needed to be found.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the not enough of above-mentioned prior art, provide a novel super pure ultrawhite heavy body light calcium production facility, energy-concerving and environment-protective, do not need kiln and fire coal in the traditional production, equipment cost is low, and production efficiency is high, and is high with the current production facility associativity of enterprise, and the equipment of being convenient for upgrades and reforms transform, and the purity and the whiteness degree of the light calcium of producing are higher, and product property can be more excellent, and the application space is wider.

For realizing the utility model discloses a technical scheme that the purpose adopted is:

the novel ultra-pure ultra-white heavy calcium carbonate is prepared by adopting superfine or ultra-fine heavy calcium carbonate powder as a raw material, carrying out continuous high-temperature electric burning modification on the raw material through an electric burning furnace, decomposing the superfine or ultra-fine heavy calcium carbonate powder into superfine or ultra-fine calcium oxide powder and carbon dioxide, mixing and digesting the obtained calcium oxide powder and water in a digester, introducing slurry obtained after digestion into a carbonization tower, introducing the carbon dioxide for carbonization, drying and scattering the slurry to obtain the novel ultra-pure ultra-white heavy calcium carbonate.

The novel production equipment for the ultra-pure ultra-white heavy light calcium comprises an electric burning furnace, a digestion machine and a carbonization tower, wherein the electric burning furnace is connected with the digestion machine through a bucket elevator, and the digestion machine is connected with the carbonization tower through a pipeline.

The electric burning furnace comprises a hearth and a plate chain system arranged in the hearth, wherein a transverse partition plate is arranged in the hearth and divides the hearth into an upper heating chamber and a lower power chamber, an electric heating mechanism is distributed on the side wall of the heating chamber, the plate chain system is arranged in the power chamber, a blanking chamber is arranged on the front side of the heating chamber, a discharging chamber is arranged on the rear side of the heating chamber, the heating chamber and the power chamber are communicated with each other through a slit penetrating through the transverse partition plate, the plate chain system comprises a driving chain wheel, a driven chain wheel, a mother chain link and a child chain link which are connected end to end around the driving chain wheel and the driven chain wheel, the mother chain link is fixedly connected with a conveying plate through a mother connecting plate, and the mother connecting plate can penetrate through the slit to connect the conveying plate in the heating chamber and the mother.

The discharge chamber of the electric furnace is connected with the feed pipe of the digestion machine through a bucket elevator, and the discharge pipe of the digestion machine is connected with the high-level feed inlet of the carbonization tower through a pipeline.

The front end of the heating chamber is provided with a preheating chamber, the preheating chamber is connected with the discharge chamber through a heat pipe, and an axial flow fan is arranged in the heat pipe.

And the sub-chain links are provided with sub-connecting plates which fill gaps between two adjacent mother connecting plates and the conveying plate.

And one end of each conveying plate is provided with an arc bulge, and the other end of each conveying plate is provided with a groove matched with the arc bulge of the adjacent conveying plate.

The plate chain system is internally provided with a supporting wheel, and a cleaning wheel is arranged below the discharge chamber.

The digester includes vertical jar of body, jar body is bilayer structure, for holding the space of cooling water between its inner and outer wall, be provided with high-order outlet pipe and low-order inlet tube on the external wall of jar, jar internal central (mixing) shaft that is provided with, the upper portion and the middle part that correspond jar body on the (mixing) shaft are provided with positive and negative stirring vane, correspond jar body lower part and are provided with helical blade, jar body top is provided with inlet pipe, water filling port and motor, the motor with the (mixing) shaft linkage, the drive (mixing) shaft is rotatory, jar body lower extreme is provided with ejection of compact control.

And meshes are distributed on the positive and negative stirring blades.

Two annular partition plates are arranged in the space for containing the cooling water, the space is divided into an upper part, a middle part and a lower part, and a high-position water outlet pipe and a low-position water inlet pipe are arranged on the outer wall of each part.

The space top between the internal and external walls of tank is provided with third annular baffle, forms the water injection chamber in third annular baffle top, has laid a plurality of water filling ports on the internal wall of jar that water injection chamber department corresponds, water injection chamber and cooling water space intercommunication to through control valve control.

The carbonization tower comprises a tank body, the tank body comprises a cylindrical cover body and a circular base, a vent pipe is arranged at the top end of the cover body, a high-level feed inlet and a low-level discharge outlet are arranged at the side part of the cover body, a vertical straight spray pipe is arranged at the axis of the top surface of the base, a plurality of annularly distributed surrounding spray heads are arranged on the top surface of the base around the straight spray pipe, the spraying direction of the surrounding spray heads is the same as the contour tangential direction of the radial opposite position of the base, inner spray heads are arranged in the surrounding spray heads, the interior of the surrounding spray heads is divided into an inner cavity and an outer cavity through the inner spray heads, a partition plate is arranged in the base, the interior of the base is divided into a first bin body at the upper part and a second bin body at the lower part through the partition plate, the first bin, the second bin body is connected with a carbon dioxide gas source through an air pipe, one-way valves are arranged in the straight spray pipe, the nozzle part surrounding the spray head and the inner spray head, a pulse valve is arranged on the air pipe, and a pressure safety valve is arranged at the top of the cover body.

The breather pipe is connected with the condenser pipe, and the lower extreme of condenser pipe is connected with the collection liquid storehouse, is provided with high-order outlet duct and low-order drain pipe on the collection liquid storehouse.

The utility model discloses main beneficial effect for prior art has:

1) the obtained light calcium carbonate has narrow particle size, uniform distribution and large specific surface area, the sedimentation ratio reaches 2.2-3.0, and the functional effect better than that of the traditional light calcium carbonate is achieved.

2) The method combines the existing superfine or superfine heavy calcium carbonate production line of an enterprise, upgrades and reforms equipment, has high combination degree with the existing equipment, extends the production line, realizes further deep processing and production line-based continuous production, enriches the products of the enterprise, and has better performance and wider application space of the obtained light calcium carbonate product.

3) By adopting the ultrafine or superfine heavy calcium carbonate and the electric furnace, the continuous calcination is effectively realized, the production efficiency is high, and meanwhile, the problems of high energy consumption, serious environmental pollution, more light calcium impurities, poor purity and whiteness and limited application range in the traditional high-temperature calcination by mixing white coal and stone are avoided.

Drawings

The invention will be further explained with reference to the drawings:

FIG. 1 is a schematic view of a part of the production line structure of the present invention;

FIG. 2 is a schematic view of the electric furnace of FIG. 1;

FIG. 3 is a sectional view taken along line A-A of FIG. 1;

FIG. 4 is a schematic view of the furnace of FIG. 2:

FIG. 5 is a schematic structural view of the female link of FIG. 2;

fig. 6 is a schematic view of the structure of a sub-link in fig. 2.

FIG. 7 is a schematic diagram of the structure of the digester of FIG. 1;

FIG. 8 is a schematic view of the structure of the carbonator shown in FIG. 1;

FIG. 9 is a schematic perspective view of the base of FIG. 8;

FIG. 10 is a schematic structural view of the showerhead of FIG. 8;

fig. 11 is a perspective view of the head of fig. 8.

Detailed Description

The technical solution of the present invention is further described in detail with reference to the following specific embodiments.

In the actual production process of the applicant, in the prior art, calcium carbonate ore raw materials such as limestone, calcite and the like are adopted to prepare ultrafine or superfine ground calcium carbonate powder through the steps of jaw crushing, impurity removal, grinding and the like, and the ultrafine or superfine ground calcium carbonate powder is hereinafter referred to as ultrafine or superfine ground calcium carbonate.

The novel ultra-pure ultra-white large-sediment light calcium carbonate is short for light calcium carbonate, the ultra-fine or ultra-fine heavy calcium carbonate prepared by the prior art is used as a raw material, the ultra-fine or ultra-fine heavy calcium carbonate powder is subjected to continuous high-temperature electric burning modification through an electric burning furnace, the ultra-fine or ultra-fine heavy calcium carbonate powder is decomposed into ultra-fine or ultra-fine calcium oxide powder and carbon dioxide, the obtained calcium oxide powder and water are mixed and digested in a digester to obtain digested slurry, the concentration of the slurry is preferably controlled to be 8-12%, the obtained slurry is introduced into a carbonization tower, carbon dioxide with the concentration not lower than 25% is introduced for carbonization, and the light calcium carbonate product can be obtained through filter pressing, drying, scattering and packaging.

Specifically, the applicant produces the calcium oxide by connecting an electric burning furnace 2 to a discharge port of a conventional ultrafine or ultrafine heavy calcium storage tank 1, supplying ultrafine or ultrafine heavy calcium powder into the electric burning furnace 2 through a feed end of the electric burning furnace 2, continuously calcining the ultrafine or ultrafine heavy calcium powder by the electric burning furnace 2 to decompose the ultrafine or ultrafine heavy calcium powder into ultrafine or ultrafine calcium oxide powder and carbon dioxide, connecting a discharge end of the electric burning furnace 2 to a digesting machine 4 through a bucket elevator 3, transferring the calcium oxide powder calcined by the electric burning furnace 2 to the digesting machine 4 through the bucket elevator 3 to perform a digestion reaction to prepare a digested slurry, connecting the digesting machine 4 to a carbonizing tower 5 through a pipeline, transferring the digested slurry prepared by the digesting machine 4 to the carbonizing tower 5 through a pipeline to perform a carbonization reaction, and performing a filter pressing reaction through a filter press in the prior art, referring to fig. 1, Drying by a dryer and scattering by a scattering machine to obtain the novel ultra-pure ultra-white heavy calcium carbonate.

Referring to FIGS. 2-6: the electric burning furnace comprises a hearth 2-1 and a plate chain system 2-2 which is arranged in the hearth 2-1 and used for conveying heavy calcium powder, wherein a transverse partition plate 2-6 is arranged in the middle of the hearth 2-1, the hearth 2-1 is divided into an upper heating chamber 2-4 and a lower power chamber 2-5 by the transverse partition plate 2-6, and the heating chamber 2-4 and the power chamber 2-5 are communicated with each other through a slit 2-13 which penetrates through the transverse partition plate 2-6. The plate chain system 2-2 is arranged in the power chamber 2-5, the side wall of the heating chamber 2-4 is provided with an electric heating mechanism 2-3, and the electric heating mechanism 2-3 can adopt electric heating wires, electric heating pipes, electric heating plates and other electric heating devices. The front side of the heating chamber 2-4 is divided into a blanking chamber 2-8 by a first vertical clapboard 2-7, a blanking hopper 2-22 is arranged in the blanking chamber 2-8 to distribute heavy calcium powder on a plate chain system 2-2, the rear side of the heating chamber 2-4 is divided into a discharging chamber 2-10 by a second vertical clapboard 2-9, the first vertical partition boards 2-7 and the second vertical partition boards 2-9 are respectively provided with first through holes 2-11 and second through holes 2-12, the height of the first through holes 2-11 can limit the thickness of the heavy calcium powder, the heavy calcium powder is fully calcined and decomposed, preferably, a sliding plate (not shown) capable of sliding up and down can be arranged on the first vertical partition plate 2-7 to realize the height adjustment of the first through hole 2-11 and further realize the adjustment and control of the thickness of the heavy calcium powder. The transverse partition plates 2-6 are arranged, so that the heat generated by the electric heating mechanisms 2-3 in the heating chambers 2-4 is reduced to be radiated and dissipated to the outside when the calcium carbonate powder is heated by the electric heating mechanisms 2-3. The plate chain system 2-2 in the power room 2-5 comprises a driving chain wheel 2-14 and a driven chain wheel 2-15 and a plate chain surrounding the driving chain wheel 2-14 and the driven chain wheel 2-15, wherein the plate chain is formed by connecting mother chain links 2-16 and son chain links 2-17 in sequence end to end, the mother chain links 2-16 are fixedly connected with conveying plates 2-19 through mother connecting plates 2-18, and the mother connecting plates 2-18 can penetrate through the slits 2-13 to connect the conveying plates 2-19 in the heating room 2-4 and the mother chain links 2-16 in the power room 2-5. In the working process of the calcining furnace, a driving chain wheel 2-14 in a plate chain system 2-2 is driven by a motor 2-20 to continuously rotate to drive a mother chain link 2-16, a child chain link 2-17 and a driven chain wheel 2-15 to move, a mother connecting plate 2-18 fixedly connected with the mother chain link 2-16 extends into a heating chamber 2-4 through a slit 2-13 arranged on a transverse clapboard 2-6, a conveying plate 2-19 arranged at the top of the mother connecting plate 2-18 drives heavy calcium carbonate powder to pass through a first through hole 2-11 and convey the heavy calcium carbonate powder to the heating chamber 2-4 from a discharging chamber 2-8, calcium oxide formed by calcining and decomposing the heavy calcium carbonate powder is driven by the conveying plate 2-19 to pass through a second through hole 2-12 to enter a discharging chamber 2-10 and then is discharged from a discharging groove 2-21, realizes the continuous calcination of calcium carbonate powder. The heating chamber 2-4 and the power chamber 2-5 which are separated from each other can protect the master chain links 2-16 and the slave chain links 2-17 from being influenced by high temperature in the heating chamber 2-4, and avoid overheating phenomena and influence on the mechanical property of the master chain links and the slave chain links.

Further preferably, a preheating chamber 2-23 is arranged at the front end of the heating chamber 2-4 through a third vertical partition plate 2-31, the preheating chamber 2-23 is connected with the preheating chamber 2-23 and the discharging chamber 2-10 through a heat pipe 2-24, an axial flow fan 2-25 is arranged in the heat pipe 2-24, the axial flow fan 2-25 is preferably a high-temperature resistant axial flow fan with an external motor, a flaring structure is arranged in the preheating chamber 2-23 at the outlet end of the heat pipe 2-24, and a wind blocking screen is arranged in the flaring structure, so that the air velocity can be reduced, and the heavy calcium carbonate powder is prevented from being blown away. By arranging the heat pipes 2-24 for connecting the preheating chambers 2-23 and the discharge chambers 2-10, the waste heat in the discharge chambers 2-10 can be driven by the high-temperature resistant axial flow fans 2-25 to enter the preheating chambers 2-23, so that the heavy calcium carbonate powder is preheated in advance before entering the heating chambers 2-4, the preheated heavy calcium carbonate powder enters the heating chambers 2-4, the working pressure of the electric heating mechanism 2-3 is reduced, and the heating chambers 2-4 of the heavy calcium carbonate powder are rapidly heated to the decomposition temperature and are fully decomposed.

Preferably, the sub-link 2-17 is provided with sub-link plates 2-26, and the sub-link plates 2-26 fill gaps between two adjacent mother link plates 2-18, so that when the conveying plates 2-19 convey powder, the plate link system 2-2 cannot bend downwards due to the gravity of the powder and the self-body of the powder, friction is avoided after the powder contacts with the diaphragm plates 2-6, and the increase of the power output load of the motor 2-20 is avoided. Meanwhile, the front and back contact of the female connecting plate 2-18 and the male connecting plate 2-26 can reduce the heat loss in the heating chamber 2-4 caused by the slits 2-13. The arc-shaped bulges 2-27 are arranged at one end of the conveying plate 2-19 in the moving direction of the plate chain system 2-2, and the grooves 2-28 matched with the arc-shaped bulges 2-27 of the adjacent conveying plate 2-19 are arranged at the end opposite to the end, so that the contact tightness between the conveying plates 2-19 is improved, fine materials are prevented from entering gaps between the adjacent conveying plates 2-19, and the plate chain system 2-2 is prevented from being blocked. Meanwhile, the supporting wheels 2-29 are arranged below the upper plate chain corresponding to the heating chamber 2-4 in the plate chain system 2-2, and under the action of the resultant force of the supporting wheels 2-29 arranged in the plate chain system 2-2, the phenomenon that the main chain links 2-16 and the sub chain links 2-17 moving to the position right below the heating chamber 2-4 are bent and drooped due to the action of materials and self weight is further avoided through the mutual engagement of the arc bulges 2-27 and the grooves 2-28. A cleaning wheel 2-30 is arranged at one side of the plate chain system 2-2 below the discharge chamber 2-10, a second discharge mechanism (not shown) is arranged below the cleaning wheel 2-30, the calcium oxide powder attached to the surfaces of the conveying plates 2-19 can be cleaned and discharged by the second discharging mechanism for recycling, so that when the electric furnace does not work, under the action of moisture and carbon dioxide in the air, calcium oxide is hardened or generates electrochemical corrosion with the conveying plates 2-19, a large amount of hardening can cause uneven heating of the conveying plates 2-19 and overlarge internal stress, cracking is easy to occur under the action of alternating cold and heat and external force, and the surface smoothness of the conveying plates 2-19 is affected by electrochemical corrosion, so that the conveying plates 2-19 are easier to rust under the action of high temperature.

Referring to fig. 7, the digester comprises a tank body 4-1 which is vertically arranged, the tank body 4-1 adopts a tank wall with a double-layer structure and comprises an outer wall 4-1-1 and an inner wall 4-1-2, a space for containing cooling water is arranged between the inner wall and the outer wall, a low-level water inlet pipe 4-1-3 and a high-level water outlet pipe 4-1-4 are arranged on the outer wall 4-1-1 of the tank body 4-1 and are used as cooling water inlet and outlet channels of a cooling water space, and cooling control over the tank body 4-1 is achieved. The central stirring shaft 4-2 is arranged in the tank body 4-1, the upper part and the middle part of the stirring shaft 4-2 corresponding to the tank body 4-1 are provided with positive and negative stirring blades 4-2-1, when the positive and negative stirring blades 4-2-1 realize the rotation of the stirring shaft 4-2, the positive stirring blade turns the slurry downwards or upwards, and the reverse stirring blade turns the slurry upwards or downwards, so that the slurry is fully stirred and mixed, the digestion reaction efficiency is improved, the slurry is fully reacted, the stirring shaft 4-2 is provided with a helical blade 4-2-2 corresponding to the lower part of the tank body 4-1, on one hand, the slurry is conveniently pushed when the slurry is discharged, the discharge efficiency is improved, on the other hand, the slurry is pushed towards the bottom of the tank body 4-1 when the digestion reaction is carried out, the materials are rolled upwards along the side wall of the tank body 4-1, and the pulp is further stirred and mixed. The top of the tank body 4-1 is provided with a feeding pipe 4-5, a water injection port and a motor 4-6, the feeding pipe 4-5 conveys calcium oxide into the tank body 4-1, the water injection port 4-7 injects water into the tank body 4-1, the motor 4-6 is linked with the stirring shaft 4-2 to drive the stirring shaft 4-2 to rotate, the lower part of the stirring shaft 4-2 is sleeved with a stabilizing sleeve 4-8, the stabilizing sleeve 4-8 is connected with the inner wall 4-1-2 of the tank body 4-1 through a supporting rod 4-4, the lower end of the tank body 4-1 is provided with a discharge control valve and a discharge pipe 4-1-6, and slurry after digestion reaction is discharged. The positive and negative stirring blades 4-2-1 are provided with meshes, so that the dispersion efficiency and the digestion speed of raw materials can be further improved, and the raw materials can be sufficiently digested, wherein the adjacent positive and negative stirring blades 4-2-1 corresponding to the upper part of the tank body 4-1 are arranged in a staggered mode at a certain distance in the axial direction, the positive and negative stirring blades 4-2-1 corresponding to the middle part of the tank body 4-1 are arranged in a layered mode in the axial direction, and the positive and negative stirring blades and the reverse stirring blades are arranged at the same height. Two annular partition plates 4-1-5 are arranged in the space for containing the cooling water, the space is divided into an upper part, a middle part and a lower part, a high-position water outlet pipe 4-1-4 and a low-position water inlet pipe 4-1-3 are arranged on the outer wall of each part, the temperature of each part can be effectively controlled by controlling the flow rate of the cooling water of each part, so that three-stage sectional cooling control on the tank body 4-1 is realized, each part of the tank body 4-1 is kept at the optimal digestion temperature, the digestion efficiency is improved, and one-tank type continuous three-stage digestion from top to bottom is realized.

A third annular partition plate 4-1-5-1 is arranged at the top of a space between the inner wall 4-1-2 and the outer wall 4-1-1 of the tank body 4-1, a water injection cavity 4-1-7 is formed above the third annular partition plate 4-1-5-1, a plurality of water injection ports 4-1-8 are distributed on the inner wall 4-1-2 of the tank body 4-1 corresponding to the water injection cavity 4-1-7, the water injection cavity 4-1-7 is communicated with the cooling water space through a communicating pipe 4-1-9, and on-off is controlled through a control valve, so that water supply and supplement in the tank body by using cooling water are realized, and the influence of water at a lower temperature of an external water source on the digestion reaction temperature is reduced. The water injection cavity 4-1-7 is communicated with the cooling water space at the upper part of the tank body 4-1, also can be respectively communicated with the cooling water space at the middle part and the lower part of the tank body 4-1 through a communicating pipe, and can be communicated with the water injection cavity 4-1-7 for water diversion through a high-level water outlet pipe 4-1-4 of the cooling water space, which is not described again. Through carrying out segmentation cooling control to the digestion unit jar body 4-1, the upper portion initial reaction, the heat release is big, should adopt high-speed cooling water to realize quick cooling, and the middle part is inferior, and the lower part reaction is abundant basically, and the heat release is little, can adopt lower cooling water velocity of flow, and with the (mixing) shaft 4-2 cooperation realizes multistage digestion control, simultaneously, through the setting of water injection chamber 4-1-7, the accessible cites the cooling water that has certain temperature and supplyes the water of suitable temperature in jar body 4-1, improves digestion reaction's rapid stability.

Referring to fig. 8-11, the carbonization tower comprises a tank body, the tank body comprises a cylindrical cover body 5-4 and a circular base 5-5, the cover body 5-4 is arranged on the base 5-5, the top of the cover body 5-4 is spherical, a vent pipe 5-3 is arranged at the top end, and a high-position feed inlet 5-1 and a low-position discharge outlet 5-2 are arranged on the side part of the cover body 5-4. The top surface of the base 5-5 is provided with a vertical conical straight spray pipe 5-6 at the axis, a plurality of surrounding spray heads 5-7 distributed annularly are arranged around the straight spray pipe 5-6 and on the top surface of the base 5-5, the spraying direction of the surrounding spray heads 5-7 is the same as the profile tangential direction of the radial opposite position of the base 5-5, inner spray heads 5-8 are arranged in the surrounding spray heads 5-7, the inner part of the surrounding spray heads 5-7 is divided into an inner cavity 5-9 and an outer cavity 5-10 through the inner spray heads 5-8, and the height and the direction of the inner spray heads 5-8 are the same as those of the surrounding spray heads 5-7. A clapboard 5-11 is arranged in the base 5-5, the inside of the base 5-5 is divided into a first bin body 5-12 at the upper part and a second bin body 5-13 at the lower part by the clapboard 5-11, the first bin body 5-12 is communicated with the outer cavity 5-10 and the straight spray pipe 5-6, the second bin body 5-13 is communicated with the inner cavity 5-9, the first bin body 5-12 is connected with an external high-pressure steam source by a steam pipe 5-14, the high-pressure steam source passes through the steam pipe 5-14 and the first bin body 5-12, the straight spray pipes 5-6 and the surrounding spray heads 5-7 spray steam into the tank body, the second tank body 5-13 is connected with a carbon dioxide gas source through air pipes 5-15, and the carbon dioxide gas source sprays carbon dioxide gas into the tank body through the air pipes 5-15, the second tank body 5-13 and the inner spray heads 5-8.

The digestion slurry obtained by the digestion machine 4 enters from a high-level feed inlet 1 of the carbonization tower, under the steam blowing action of the surrounding spray heads 5-7, the inner part of the cover body 5-4 makes circular rotation movement, and simultaneously, under the action of steam sprayed from the direct spray ports 5-6, the digestion slurry is uniformly stirred by moving from bottom to top in the axial direction of the cover body 5-4 and from top to bottom at the inner wall of the cover body 5-4 and rotating and rolling, the slurry is prevented from segregation by non-simple centrifugal motion, meanwhile, the full mixing and reaction of carbon dioxide gas and digestion exchange are facilitated, the carbonization efficiency is improved, the high-pressure carbon dioxide gas and steam push the slurry to move together, and redundant steam and carbon dioxide are discharged out of the carbonization tower through the vent pipe 5-3 at the top of the cover body 5-4. And after the reaction is finished, stopping spraying carbon dioxide and steam, and discharging light calcium slurry generated by the carbonization reaction from a low-position discharge hole 5-2.

Preferably, the straight spray pipes 5-6, the nozzles surrounding the spray heads 5-7 and the inner spray heads 5-8 are internally provided with one-way valves, so that the slurry can be further prevented from entering the surrounding spray heads 5-7 and the inner spray heads 5-8, and the slurry is prevented from entering the bin body and reacting with carbon dioxide to generate hard blocks to block the spray heads. The one-way valve around the nozzle of the spray head 5-7 is a valve plate 5-18 hinged with the top around the nozzle of the spray head 7, and the valve plate 5-18 can only be opened towards the outer side of the spray head 5-7. The one-way valve at the nozzle of the straight spray pipe 5-6 has the same structure as the one-way valve at the nozzle of the surrounding spray head 5-7. The one-way valve in the inner spray head 5-8 comprises an annular beam opening structure which is arranged in the inner cavity 5-9 and below the spray nozzle of the inner spray head 5-8, a pressure plate is arranged above the annular beam opening structure, a compression spring 5-16 is arranged between the pressure plate and the top wall of the inner spray head 5-8, the pressure plate is pressed on the annular beam opening structure through the compression spring 5-16 to realize sealing, and during ventilation, the pressure plate is jacked up by carbon dioxide gas to realize ventilation. The air pipes 5-15 are provided with the pulse valves 5-19, so that the intermittent injection of carbon dioxide can be realized, and the carbon dioxide is saved. The top of the cover body 5-4 is also provided with a pressure safety valve 5-23, which can ensure that the internal pressure of the cover body 5-4 is within the safety limit and ensure the safe operation of the carbonization tower.

Preferably, the vent pipe 5-3 is connected with the condenser pipe 5-17, the lower end of the condenser pipe 5-17 is connected with the liquid collecting bin 5-21, the liquid collecting bin 5-21 is provided with a high-level gas outlet pipe 5-20 and a low-level liquid outlet pipe 5-22, the gas outlet pipe 5-20 is connected with a carbon dioxide gas source for recovering gas, and the liquid outlet pipe 5-22 is connected with a steam source for recovering condensed water.

The blown down tank 2-21 of 2 discharge chambers 2-10 of electric furnace through bucket elevator 3 with the inlet pipe 4-5 of digester 4 are connected, and bucket elevator 3 can adopt elevator level or lifting machine system, carries the feed to a plurality of digesters 4, the discharging pipe 4-1-6 of digester 4 with carbonization tower 5's high-order feed inlet 5-1 passes through the tube coupling, and thick liquid digestion thick liquids carry out carbonization treatment to carbonization tower 5 in, by carbonization tower 5's low-order discharge gate 5-2 behind the treatment, the pressure filter carries out the filter-pressing, the drying-machine is dried, the scattering machine breaks up, can obtain the novel super white big heavy body light calcium carbonate of this application.

Technical scheme of the utility model not be restricted to the utility model the within range of embodiment. The technical contents not described in detail in the present invention are all known techniques.

Claims (9)

1. The utility model provides a novel production facility of super pure super white heavy body light calcium which characterized in that: the electric furnace is connected with the digesting machine through a bucket elevator, and the digesting machine is connected with the carbonization tower through a pipeline.

2. The production apparatus according to claim 1, wherein: the electric burning furnace comprises a hearth and a plate chain system arranged in the hearth, wherein a transverse partition plate is arranged in the hearth and divides the hearth into an upper heating chamber and a lower power chamber, an electric heating mechanism is distributed on the side wall of the heating chamber, the plate chain system is arranged in the power chamber, a blanking chamber is arranged on the front side of the heating chamber, a discharging chamber is arranged on the rear side of the heating chamber, the heating chamber and the power chamber are communicated with each other through a slit penetrating through the transverse partition plate, the plate chain system comprises a driving chain wheel, a driven chain wheel, a mother chain link and a child chain link which are connected end to end around the driving chain wheel and the driven chain wheel, the mother chain link is fixedly connected with a conveying plate through a mother connecting plate, and the mother connecting plate can penetrate through the slit to connect the conveying plate in the heating chamber and the mother.

3. The production apparatus according to claim 2, wherein: and the sub-chain links are provided with sub-connecting plates which fill gaps between two adjacent mother connecting plates and the conveying plate.

4. The production apparatus according to claim 2, wherein: and one end of each conveying plate is provided with an arc bulge, and the other end of each conveying plate is provided with a groove matched with the arc bulge of the adjacent conveying plate.

5. The production apparatus according to claim 1, wherein: the digester includes vertical jar of body, jar body is bilayer structure, for holding the space of cooling water between its inner and outer wall, be provided with high-order outlet pipe and low-order inlet tube on the external wall of jar, jar internal central (mixing) shaft that is provided with, the upper portion and the middle part that correspond jar body on the (mixing) shaft are provided with positive and negative stirring vane, correspond jar body lower part and are provided with helical blade, jar body top is provided with inlet pipe, water filling port and motor, the motor with the (mixing) shaft linkage, the drive (mixing) shaft is rotatory, jar body lower extreme is provided with ejection of compact control.

6. The production apparatus according to claim 5, wherein: two annular partition plates are arranged in the space for containing the cooling water, the space is divided into an upper part, a middle part and a lower part, and a high-position water outlet pipe and a low-position water inlet pipe are arranged on the outer wall of each part.

7. The production apparatus according to claim 5, wherein: the space top between the internal and external walls of tank is provided with third annular baffle, forms the water injection chamber in third annular baffle top, has laid a plurality of water filling ports on the internal wall of jar that water injection chamber department corresponds, water injection chamber and cooling water space intercommunication to through control valve control.

8. The production apparatus according to claim 1, wherein: the carbonization tower comprises a tank body, the tank body comprises a cylindrical cover body and a circular base, a vent pipe is arranged at the top end of the cover body, a high-level feed inlet and a low-level discharge outlet are arranged at the side part of the cover body, a vertical straight spray pipe is arranged at the axis of the top surface of the base, a plurality of annularly distributed surrounding spray heads are arranged on the top surface of the base around the straight spray pipe, the spraying direction of the surrounding spray heads is the same as the contour tangential direction of the radial opposite position of the base, inner spray heads are arranged in the surrounding spray heads, the interior of the surrounding spray heads is divided into an inner cavity and an outer cavity through the inner spray heads, a partition plate is arranged in the base, the interior of the base is divided into a first bin body at the upper part and a second bin body at the lower part through the partition plate, the first bin, the second bin body is connected with a carbon dioxide gas source through an air pipe, one-way valves are arranged in the straight spray pipe, the nozzle part surrounding the spray head and the inner spray head, a pulse valve is arranged on the air pipe, and a pressure safety valve is arranged at the top of the cover body.

9. The production apparatus according to claim 8, wherein: the breather pipe is connected with the condenser pipe, and the lower extreme of condenser pipe is connected with the collection liquid storehouse, is provided with high-order outlet duct and low-order drain pipe on the collection liquid storehouse.

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