CN113955760A - White carbon black preparation equipment and process - Google Patents
White carbon black preparation equipment and process Download PDFInfo
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- CN113955760A CN113955760A CN202111236180.XA CN202111236180A CN113955760A CN 113955760 A CN113955760 A CN 113955760A CN 202111236180 A CN202111236180 A CN 202111236180A CN 113955760 A CN113955760 A CN 113955760A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/126—Preparation of silica of undetermined type
- C01B33/128—Preparation of silica of undetermined type by acidic treatment of aqueous silicate solutions
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/32—Alkali metal silicates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The invention relates to the technical field of white carbon black preparation, and discloses white carbon black preparation equipment and a white carbon black preparation process. The production cost of the white carbon black is reduced by adopting a new production process, the produced white carbon black has higher quality and better comprehensive performance, and the cost required by heating clean water is reduced by exchanging heat between the liquid flowing out of the dissolving roller and the clean water and then introducing the clean hot water into the dissolving roller.
Description
Technical Field
The invention relates to the technical field of white carbon black preparation, and particularly relates to white carbon black preparation equipment and a white carbon black preparation process.
Background
The white carbon black is a general name of white powdery X-ray amorphous silicic acid and silicate products, mainly refers to precipitated silica, fumed silica and superfine silica gel, and also comprises powdery synthetic aluminum silicate, calcium silicate and the like.
The white carbon black is mainly divided into precipitated white carbon black and gas-phase white carbon black according to the production method, the gas-phase white carbon black is white amorphous flocculent semi-transparent solid colloidal nano particles in a normal state, is non-toxic and has huge specific surface area, and the gas-phase white carbon black is all nano silicon dioxide, so that the product purity is high, but the preparation process is complex and the price is high.
When the white carbon black is produced, if the produced white carbon black is high in quality, the white carbon black is high in production cost, combustion needs to be carried out in the production process, partial impurities can enter the white carbon black after combustion, the manufacturability of the final white carbon black is reduced, multiple times of combustion and cooling are carried out in the production process of the white carbon black, and resources are wasted while the cost is improved.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides equipment and a process for preparing white carbon black, and the technical problems to be solved by the invention are that: the white carbon black has high production cost and poor quality of finished white carbon black products.
The preparation equipment of white carbon black comprises a calcinator and further comprises:
a filtering mechanism: the device is arranged on the side surface of the calcining furnace and is fixedly connected with the calcining furnace;
a cyclone separator: the filter mechanism is arranged on the side surface of the filter mechanism and is fixedly connected with the filter mechanism;
a dissolving mechanism: the cyclone separator is arranged on one side away from the calcining furnace;
a heat exchanger: the dissolving mechanism is arranged on one side of the dissolving mechanism, which is far away from the filtering mechanism, and is fixedly connected with the dissolving mechanism;
proportioning box: the heat exchanger is arranged on one side far away from the dissolving mechanism;
a drying mechanism: the proportioning box is arranged on one side of the proportioning box away from the heat exchanger;
an exhaust funnel: and the drying mechanism is arranged on the side surface of the drying mechanism and is fixedly connected with the drying mechanism.
Further, the calcining furnace comprises a combustion chamber, a heat storage chamber is fixedly connected to the back of the combustion chamber, a gas inlet pipe is fixedly connected to the side surface of the combustion chamber, a gas inlet pipe is fixedly connected to one side of the gas inlet pipe, which is far away from the combustion chamber, a box cover is fixedly connected to the side surface of the bottom end of the gas inlet pipe, a filter box is fixedly connected to the bottom end of the box cover, a rotary table is movably connected to the top end of the box cover, a rotating screw is fixedly connected to the bottom end of the rotary table, a rotary drum is connected to the middle part of the side surface of the rotating screw in a threaded manner, a filter plate is fixedly connected to the side surface of the rotary drum, a limit block is fixedly connected to the bottom end of the rotating screw, a gas outlet pipe is fixedly connected to the bottom end of the filter box, a separation chamber is fixedly connected to the bottom end of the gas outlet pipe, an air inlet chamber is fixedly connected to the bottom end of the filter box, and the filter plate is always positioned at the top end of the filter box, the gas inlet pipe is positioned at the top end of the filter box and positioned at the top end of the filter plate, the side surface of the filter plate is in close contact with the inner side of the filter box, and the bottom end of the filter plate is provided with a chamfer angle, so that the filter plate can be conveniently installed and placed in the filter box.
Further, dissolve the mechanism including dissolving the cylinder, dissolve the middle part fixedly connected with drive gear of cylinder side, drive gear's outer transmission connection along is connected with output mechanism, the equal intermeshing of gear, dissolve the both ends fixedly connected with spacing ring of cylinder side, the side swing joint of spacing ring has the guide rail, the side fixedly connected with connecting block of guide rail, the bottom fixedly connected with fixed plate of connecting block, the spout has been seted up to the side of guide rail, the spacing ring is located the spout of guide rail, the spout degree of depth of guide rail is greater than three centimetres, the bottom of dissolving the cylinder both sides all is equipped with the guide rail to when preventing to dissolve the cylinder and driving the spacing ring and rotate, the spacing ring can break away from the guide rail, improve the security of equipment operation.
Further, dissolve the side fixedly connected with inlet tube of cylinder, one side fixedly connected with heat transfer board that dissolves the cylinder is kept away from to the inlet tube, one side fixedly connected with outlet pipe on heat transfer board top, the opposite side fixedly connected with waste pipe on heat transfer board top, one side fixedly connected with water tank of heat transfer board is kept away from to the outlet pipe, the bottom fixedly connected with waste pipe of heat transfer board side, waste pipe and one side fixed connection that output mechanism was kept away from to the cylinder that dissolves, what the outlet pipe flowed is clean water, and the water that flows out in the outlet pipe carries out the heat exchange back through the heat transfer board, flows into from the inlet tube and dissolves in the cylinder, the water that the drain pipe flows out flows through waste pipe after carrying out the heat exchange through the heat transfer board, reduces the cost that the water in the water tank heaies up.
Furthermore, the side of ratio case is equipped with the drying tower, the top fixedly connected with discharge pipe of drying tower side, the sack is collected to the bottom fixedly connected with of discharge pipe, collect the sack and keep away from one side fixedly connected with blast pipe of drying tower, one side fixedly connected with aiutage of collecting the sack is kept away from to the blast pipe, the height of aiutage is greater than twenty meters, and the gas itself that discharges in the blast pipe is clean harmless, and only the temperature is higher, and consequently the gas that discharges in the blast pipe can be discharged after cooling through the aiutage, is favorable to reducing greenhouse effect.
The preparation process of the white carbon black is characterized by comprising the following steps: the method comprises a preparation stage, a calcination working section, an alkali dissolving working section, a reaction working section and a drying working section.
Further, the flow of the calcination section is as follows: mixing soda ash and quartz sand according to a ratio, putting the mixture into a calcining furnace, carrying out melting reaction at the high temperature of 1300 plus 1500 ℃, wherein the calcining furnace fuel is purified gas, the gas is purified by cyclone sedimentation and water seal and then enters a calcining furnace combustion chamber, the flue gas generated in the combustion process is discharged from a forty-five meter high chimney after the waste heat of the flue gas is recovered by a calcining furnace regenerator, and the gas furnace cinder and the dedusting collected dedusting ash are sprayed with water to be humidified and then are sold for comprehensive utilization;
the method comprises the following steps that a molten material generated by a calcination reaction flows out of a furnace to a quenching tank, solid water glass is obtained after direct water spraying and quenching, after waste heat of quenching waste water is recovered by a plate heat exchanger (indirect heat exchange is carried out with fresh water, and the heated fresh water enters a hot water tank of a reaction section as reaction water), the solid water glass is recycled, and the reaction formula of the calcination process is as follows: nNa2CO3+ mSiO2 → nNa2O mSiO2+ nCO2 ≠ 97.
Further, the detailed flow of the alkali dissolving section is as follows: delivering the quenched solid water glass into a dissolving roller, introducing steam and hot water for dissolving to obtain liquid water glass, and pumping the liquid water glass to an alkali storage tank in a reaction section for later use after the liquid water glass passes through a buffer tank and a liquid discharging tank and then a plate heat exchanger to recover waste heat (the waste heat is indirectly exchanged with fresh water which enters the hot water tank as dissolving water after being heated).
Further, the detailed flow of the reaction section is as follows: firstly, pumping liquid sodium silicate in an alkali storage tank into a pre-preparation alkali tank, then pumping the liquid sodium silicate into a preparation tank from the pre-preparation alkali tank, adding water to adjust to a proper concentration, and pumping the prepared alkali tank for later use;
pumping the prepared liquid water glass into a reactor, introducing steam and hot water, adding concentrated sulfuric acid, controlling certain process conditions for reaction to obtain qualified reaction slurry, recovering waste heat of the reaction slurry by a tube-in-tube heat exchanger (indirectly exchanging heat with fresh water, and feeding the heated fresh water into a hot water tank of a reaction section to serve as reaction water) and feeding the reaction slurry into an intermediate tank for later use;
and finally, sending the reaction slurry to a plate-and-frame filter press for filtering, washing and blow-drying to form a white carbon black filter cake with the solid content of 20%, pulping the filter cake by a pulping machine, pumping a thick slurry tank in a drying section for later use, performing precipitation neutralization treatment on filtrate of the filter press and washing wastewater, discharging, and performing outward sale comprehensive utilization on calcium sulfate slag generated by precipitation, wherein the reaction formula of the reaction process is as follows: nNa2O mSiO2+ nH2SO4 → nNa2SO4+ mSiO2 nH 2O.
Further, pumping the white carbon black concentrated slurry in the concentrated slurry tank into a centrifugal spray head of a drying tower, contacting hot air from a hot-blast stove in the drying tower to evaporate water to obtain qualified white carbon black, carrying out gas-solid separation by a cloth bag collector to recover a finished product, directly packaging the finished product collected by the cloth bag collector for storage, discharging tail gas discharged from the cloth bag collector by a high-exhaust cylinder of 20 meters, and returning finished product dust generated in the packaging process to the cloth bag collector;
flue gas generated in the coal burning process of the hot blast stove is subjected to indirect heat exchange with cold air in a heat exchange chamber, is subjected to cloth bag dust removal and then is discharged from a chimney with the height of twenty-five meters, and the cinder and dust collected by the hot blast stove are sprayed with water to be humidified for comprehensive utilization for sale.
The invention has the technical effects and advantages that:
1. the production cost of the white carbon black is reduced by adopting a new production process, and the produced white carbon black has higher quality and better comprehensive performance;
2. the rotary screw, the filter box and the filter plate are arranged, so that the quality of the finished white carbon black product is improved;
3. the invention is beneficial to reducing the cost by arranging the heat exchange plate, the dissolving roller and the water inlet pipe, and clean hot water is introduced into the dissolving roller after the liquid flowing out of the dissolving roller exchanges heat with the clean water, so that the cost required by heating the clean water is reduced, and the production process is more environment-friendly.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic diagram of the calcination section of the present invention.
Fig. 3 is a schematic diagram of a filter structure according to the present invention.
FIG. 4 is a schematic view of the structure of the dissolving section of the present invention.
FIG. 5 is a schematic view of the collecting and discharging structure of the present invention
FIG. 6 is a flow chart of the production process of the present invention
The reference signs are: 1. a calciner; 101. a combustion chamber; 102. a regenerator; 2. a filtering mechanism; 201. a gas inlet pipe; 202. a filter box; 203. a box cover; 204. a turntable; 205. rotating the screw; 206. a rotating drum; 207. a limiting block; 208. a filter plate; 3. a cyclone separator; 301. an air intake chamber; 302. a separation chamber; 303. a gas outlet pipe; 4. a dissolution mechanism; 401. a dissolving roller; 402. a transmission gear; 403. a limiting ring; 404. a guide rail; 405. connecting blocks; 406. a fixing plate; 407. an output mechanism; 5. a heat exchanger; 501. a heat exchange plate; 502. a water tank; 503. a water outlet pipe; 504. a water inlet pipe; 505. a drain pipe; 506. a waste pipe; 6. a proportioning box; 7. a drying mechanism; 701. a drying tower; 702. a discharge pipe; 703. collecting the cloth bag; 704. an exhaust pipe; 8. an exhaust funnel.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and the forms of the respective structures described in the following embodiments are merely examples, and the apparatus and process for producing white carbon black for construction sites according to the present invention are not limited to the respective structures described in the following embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
Referring to fig. 1, the invention provides a preparation device and a preparation process of white carbon black, which comprises a calcinator 1 and further comprises the following steps:
the filtering mechanism 2: is arranged on the side surface of the calcining furnace 1 and is fixedly connected with the calcining furnace 1;
the cyclone separator 3: is arranged on the side surface of the filtering mechanism 2 and is fixedly connected with the filtering mechanism 2;
a dissolving mechanism 4: is arranged at one side of the cyclone separator 3 far away from the calcining furnace 1;
and (4) heat exchanger 5: the dissolving mechanism 4 is arranged at one side of the dissolving mechanism 4 far away from the filtering mechanism 2 and is fixedly connected with the dissolving mechanism 4;
proportioning box 6: is arranged at one side of the heat exchanger 5 far away from the dissolving mechanism 4;
and a drying mechanism 7: is arranged at one side of the proportioning box 6 far away from the heat exchanger 5;
an exhaust cylinder 8: is arranged on the side surface of the drying mechanism 7 and is fixedly connected with the drying mechanism 7.
Referring to fig. 2 and 3, the calciner 1 comprises a combustion chamber 101, a regenerator 102 is fixedly connected to the back of the combustion chamber 101, a gas inlet pipe 201 is fixedly connected to the side surface of the gas inlet pipe 201 away from the combustion chamber 101, a box cover 203 is fixedly connected to the side surface of the bottom end of the gas inlet pipe 201, a filter box 202 is fixedly connected to the bottom end of the box cover 203, a turntable 204 is movably connected to the top end of the box cover 203, a rotating screw 205 is fixedly connected to the bottom end of the turntable 204, a rotating drum 206 is connected to the middle part of the side surface of the rotating screw 205 in a threaded manner, a filter plate 208 is fixedly connected to the side surface of the rotating screw 206, a limit block 207 is fixedly connected to the bottom end of the side surface of the filter box 202, a gas outlet pipe 303 is fixedly connected to the bottom end of the gas outlet pipe 303, a separation chamber 302 is fixedly connected to the bottom end of the separation chamber 302, after separating the gas-solid material in the coal gas through separation chamber 302, reentrant filter 202 in, separate through filter 208, and the solution in the filter 202 can absorb the sulphide in the coal gas, rotate carousel 204, carousel 204 rotates and drives the rotary drum 206 and rotate, thereby make filter 208 reciprocate, conveniently clear up the solid particle of filter 202 inner wall, thereby make clean coal gas enter into the combustion chamber 101 and react, improve the off-the-shelf quality of white carbon black.
Referring to fig. 4, the dissolving mechanism 4 includes a dissolving drum 401, a transmission gear 402 is fixedly connected to the middle of the side of the dissolving drum 401, an output mechanism 407 is connected to the outer edge of the transmission gear 402, gears are engaged with each other, two limit rings 403 are fixedly connected to the two ends of the side of the dissolving drum 401, a guide rail 404 is movably connected to the side of the limit ring 403, a connecting block 405 is fixedly connected to the side of the guide rail 404, a bottom end fixedly connected to the fixing plate 406 of the connecting block 405, the transmission gear 402 is driven to rotate through the output mechanism 407, thereby the dissolving drum 401 is rotated, the limit rings 403 are driven to move in the sliding grooves of the guide rail 404 by the rotation of the dissolving drum 401, thereby ensuring the stable rotation of the dissolving drum 401, and when the dissolving drum 401 rotates, the dissolving efficiency of each substance in the dissolving drum 401 is improved, the dissolving effect is improved, and the reaction time is shortened.
Referring to fig. 4, a water inlet pipe 504 is fixedly connected to the side of the dissolving drum 401, a heat exchange plate 501 is fixedly connected to one side of the water inlet pipe 504 away from the dissolving drum 401, a water outlet pipe 503 is fixedly connected to one side of the top end of the heat exchange plate 501, a waste water pipe 506 is fixedly connected to the other side of the top end of the heat exchange plate 501, a water tank 502 is fixedly connected to one side of the water outlet pipe 503 away from the heat exchange plate 501, the waste water pipe 506 is fixedly connected to one side of the dissolving drum 401 away from the output mechanism 407, clean water flowing out of the water tank 502 is subjected to heat exchange through the heat exchange plate 501 and then enters the dissolving drum 401 through the water inlet pipe 504 for reaction, liquid water glass after reaction in the dissolving drum 401 is discharged through the heat exchange plate 501 and then is collected through the waste water pipe 506, and heat generated during cooling of the liquid water glass is used for heating up liquid in the water outlet pipe 503, the utilization rate of resources is improved, and cost control is facilitated.
Referring to fig. 5, a drying tower 701 is arranged on the side surface of a proportioning box 6, a discharge pipe 702 is fixedly connected to the top end of the side surface of the drying tower 701, a collection cloth bag 703 is fixedly connected to the bottom end of the discharge pipe 702, an exhaust pipe 704 is fixedly connected to one side of the collection cloth bag 703, the exhaust pipe 704 is fixedly connected to one side of the collection cloth bag 703, liquid water glass is configured through the proportioning box 6 and then sent into the drying tower 701 to be dried, and after the dried white carbon black powder is collected through the collection cloth bag 703, the dried white carbon black powder is discharged through the exhaust pipe 704 and the exhaust pipe 8.
Referring to fig. 6, a preparation process of white carbon black is characterized in that the preparation process of white carbon black comprises the following steps: the method comprises a preparation stage, a calcination working section, an alkali dissolving working section, a reaction working section and a drying working section.
Referring to fig. 6, the flow of the calcination section is: mixing soda ash and quartz sand according to a ratio, putting the mixture into a calcining furnace, carrying out melting reaction at the high temperature of 1300 plus 1500 ℃, wherein the calcining furnace fuel is purified gas, the gas is purified by cyclone sedimentation and water seal and then enters a calcining furnace combustion chamber, the flue gas generated in the combustion process is discharged from a forty-five meter high chimney after the waste heat of the flue gas is recovered by a calcining furnace regenerator, and the gas furnace cinder and the dedusting collected dedusting ash are sprayed with water to be humidified and then are sold for comprehensive utilization;
the method comprises the following steps that a molten material generated by a calcination reaction flows out of a furnace to a quenching tank, solid water glass is obtained after direct water spraying and quenching, after waste heat of quenching waste water is recovered by a plate heat exchanger (indirect heat exchange is carried out with fresh water, and the heated fresh water enters a hot water tank of a reaction section as reaction water), the solid water glass is recycled, and the reaction formula of the calcination process is as follows: nNa2CO3+ mSiO2 → nNa2O mSiO2+ nCO2 ≠ 97.
Referring to fig. 6, the detailed flow of the alkali dissolving section is as follows: the quenched solid water glass is conveyed into a dissolving roller, steam and hot water are introduced for dissolving to obtain liquid water glass, the liquid water glass passes through a buffer tank and a liquid discharging tank, and is pumped to an alkali storage tank in a reaction working section for standby after waste heat is recovered by a plate heat exchanger (the liquid water is subjected to indirect heat exchange with fresh water, and the heated fresh water enters a hot water tank in the reaction working section to serve as dissolving water), the waste heat is recovered by a tubular heat exchanger in a mode of indirect heat exchange with the fresh water, and the heated fresh water enters the hot water tank in the reaction working section to serve as reaction water, so that the cost and resources required by co-heating are reduced, the generated calcium sulfate slag can be utilized in a mode of selling and the like, and the cost control is facilitated.
Referring to fig. 6, the detailed flow of the reaction section is: firstly, pumping liquid sodium silicate in an alkali storage tank into a pre-preparation alkali tank, then pumping the liquid sodium silicate into a preparation tank from the pre-preparation alkali tank, adding water to adjust to a proper concentration, and pumping the prepared alkali tank for later use;
pumping the prepared liquid water glass into a reactor, introducing steam and hot water, adding concentrated sulfuric acid, controlling certain process conditions for reaction to obtain qualified reaction slurry, recovering waste heat of the reaction slurry by a tube-in-tube heat exchanger (indirectly exchanging heat with fresh water, and feeding the heated fresh water into a hot water tank of a reaction section to serve as reaction water) and feeding the reaction slurry into an intermediate tank for later use;
and finally, sending the reaction slurry to a plate-and-frame filter press for filtering, washing and blow-drying to form a white carbon black filter cake with the solid content of 20%, pulping the filter cake by a pulping machine, pumping a thick slurry tank in a drying section for later use, performing precipitation neutralization treatment on filtrate of the filter press and washing wastewater, discharging, and performing outward sale comprehensive utilization on calcium sulfate slag generated by precipitation, wherein the reaction formula of the reaction process is as follows: nNa2O mSiO2+ nH2SO4 → nNa2SO4+ mSiO2 nH 2O.
Referring to fig. 6, the detailed flow of the reaction section is: pumping the white carbon black concentrated slurry in the concentrated slurry tank into a centrifugal spray head of a drying tower, contacting hot air from a hot-blast stove in the drying tower, evaporating water to obtain qualified white carbon black, carrying out gas-solid separation by using a cloth bag collector to recover a finished product, directly packaging the finished product collected by the cloth bag collector into a warehouse, discharging tail gas discharged from the cloth bag collector by using a high-exhaust cylinder of 20 meters, and returning finished product dust generated in the packaging process to the cloth bag collector;
flue gas generated in the coal burning process of the hot blast stove is indirectly subjected to heat exchange with cold air in a heat exchange chamber, is discharged from a twenty-five-meter high chimney after being subjected to cloth bag dust removal, is comprehensively utilized for sale after being subjected to water spray humidification, and is recycled after being subjected to water spray humidification, so that the temperature of the furnace coal slag is reduced through water spray, the condition of hurting people due to overhigh temperature during collection is prevented, and the furnace coal slag is recycled, thereby being beneficial to further control cost, and producing white carbon black with higher treatment while the cost is as low as possible.
The working principle is as follows: s1, the raw materials are placed into a calciner 1 for calcination, during calcination, gas in an air inlet chamber 301 is subjected to gas-solid separation through a separation chamber 302 and then enters a filter box 202 through a gas outlet pipe 303, the gas entering the filter box 202 is absorbed through a solution in the filter box 202, and the solid remaining in the gas is subjected to secondary filtration through a filter plate 208 and then enters a combustion chamber 101 through a gas inlet pipe 201 for calcination;
s2, when the filter box 202 is cleaned, the turntable 204 is rotated, the turntable 204 rotates to drive the rotating screw 205 to rotate, the rotating screw 205 rotates to drive the drum 206 to move, the drum 206 moves to drive the filter plate 208 to move, and after the filter plate 208 moves up and down to clean particles on the side wall of the filter box 202, the filter plate 208 can be removed for cleaning;
s3, enabling the molten materials to enter the dissolving roller 401, starting the output mechanism 407 to drive the transmission gear 402 to rotate, driving the transmission gear 402 to rotate to drive the dissolving roller 401 to rotate, rotating the dissolving roller 401 to fully mix the raw materials in the dissolving roller 401, enabling the liquid flowing out of the water outlet pipe 503 to enter the dissolving roller 401 after heat exchange is carried out on the liquid through the heat exchange plate 501, enabling the materials generated after reaction in the dissolving roller 401 to flow out through the water outlet pipe 505, cooling through the heat exchange plate 501, and then flowing out through the waste water pipe 506;
s4, the substances flowing out of the waste water pipe 506 enter the proportioning box 6 to be subjected to coupling ratio reaction for pulping, then the substances are sent into the drying tower 701 to be dried, the powder generated after drying is collected through the collecting cloth bag 703, and the gas is discharged through the exhaust funnel 8.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. The preparation equipment of white carbon black comprises a calcining furnace (1) and is characterized by further comprising:
a filter mechanism (2): the device is arranged on the side surface of the calcining furnace (1) and is fixedly connected with the calcining furnace (1);
cyclone separator (3): the filter is arranged on the side surface of the filter mechanism (2) and is fixedly connected with the filter mechanism (2);
dissolution mechanism (4): the cyclone separator (3) is arranged on one side far away from the calcining furnace (1);
heat exchanger (5): the filter mechanism is arranged on one side of the dissolving mechanism (4) far away from the filtering mechanism (2) and is fixedly connected with the dissolving mechanism (4);
proportioning box (6): the heat exchanger (5) is arranged at one side far away from the dissolving mechanism (4);
drying mechanism (7): the proportioning box (6) is arranged on one side far away from the heat exchanger (5);
exhaust stack (8): is arranged on the side surface of the drying mechanism (7) and is fixedly connected with the drying mechanism (7).
2. The equipment for preparing white carbon black according to claim 1, characterized in that: the calcining furnace (1) comprises a combustion chamber (101), a heat storage chamber (102) is fixedly connected to the back of the combustion chamber (101), a gas inlet pipe (201) is fixedly connected to the side face of the combustion chamber (101), one side, far away from the combustion chamber (101), of the gas inlet pipe (201) is fixedly connected with the gas inlet pipe (201), a box cover (203) is fixedly connected to the side face of the bottom end of the gas inlet pipe (201), a filter box (202) is fixedly connected to the bottom end of the box cover (203), a rotary plate (204) is movably connected to the top end of the box cover (203), a rotary screw (205) is fixedly connected to the bottom end of the rotary plate (204), a rotary drum (206) is in threaded connection with the middle of the side face of the rotary screw (205), a filter plate (208) is fixedly connected to the side face of the rotary drum (206), and a limiting block (207) is fixedly connected to the bottom end of the rotary screw (205), the bottom end of the side face of the filter box (202) is fixedly connected with a coal gas outlet pipe (303), the bottom end of the coal gas outlet pipe (303) is fixedly connected with a separation chamber (302), and the bottom end of the separation chamber (302) is fixedly connected with an air inlet chamber (301).
3. The equipment for preparing white carbon black according to claim 1, characterized in that: dissolving mechanism (4) including dissolving cylinder (401), the middle part fixedly connected with drive gear (402) of dissolving cylinder (401) side, the outer transmission along of drive gear (402) is connected with output mechanism (407), the equal intermeshing of gear, dissolve both ends fixedly connected with spacing ring (403) of cylinder (401) side, the side swing joint of spacing ring (403) has guide rail (404), the side fixedly connected with connecting block (405) of guide rail (404), the bottom fixedly connected with fixed plate (406) of connecting block (405).
4. The equipment for preparing white carbon black according to claim 3, characterized in that: dissolve side fixedly connected with inlet tube (504) of cylinder (401), one side fixedly connected with heat transfer board (501) of dissolving cylinder (401) is kept away from in inlet tube (504), one side fixedly connected with outlet pipe (503) on heat transfer board (501) top, opposite side fixedly connected with waste pipe (506) on heat transfer board (501) top, one side fixedly connected with water tank (502) of heat transfer board (501) are kept away from in outlet pipe (503), bottom fixedly connected with waste pipe (506) of heat transfer board (501) side, waste pipe (506) and one side fixed connection who dissolves cylinder (401) and keep away from output mechanism (407).
5. The equipment for preparing white carbon black according to claim 1, characterized in that: the drying tower (701) is arranged on the side face of the proportioning box (6), a discharge pipe (702) is fixedly connected to the top end of the side face of the drying tower (701), a collecting cloth bag (703) is fixedly connected to the bottom end of the discharge pipe (702), an exhaust pipe (704) is fixedly connected to one side, away from the drying tower (701), of the collecting cloth bag (703), and an exhaust funnel (8) is fixedly connected to one side, away from the collecting cloth bag (703), of the exhaust pipe (704).
6. The preparation process of the white carbon black is characterized by comprising the following steps: the method comprises a preparation stage, a calcination working section, an alkali dissolving working section, a reaction working section and a drying working section.
7. The preparation process of white carbon black according to claim 6, which is characterized by comprising the following steps: the flow of the calcination section is as follows: mixing soda ash and quartz sand according to a ratio, putting the mixture into a calcining furnace, carrying out melting reaction at the high temperature of 1300 plus 1500 ℃, wherein the calcining furnace fuel is purified gas, the gas is purified by cyclone sedimentation and water seal and then enters a calcining furnace combustion chamber, the flue gas generated in the combustion process is discharged from a forty-five meter high chimney after the waste heat of the flue gas is recovered by a calcining furnace regenerator, and the gas furnace cinder and the dedusting collected dedusting ash are sprayed with water to be humidified and then are sold for comprehensive utilization;
the method comprises the following steps that a molten material generated by a calcination reaction flows out of a furnace to a quenching tank, solid water glass is obtained after direct water spraying and quenching, after waste heat of quenching waste water is recovered by a plate heat exchanger (indirect heat exchange is carried out with fresh water, and the heated fresh water enters a hot water tank of a reaction section as reaction water), the solid water glass is recycled, and the reaction formula of the calcination process is as follows: nNa2CO3+ mSiO2 → nNa2O mSiO2+ nCO2 ≠ 97.
8. The preparation process of white carbon black according to claim 6, which is characterized by comprising the following steps: the detailed flow of the alkali dissolving section is as follows: delivering the quenched solid water glass into a dissolving roller, introducing steam and hot water for dissolving to obtain liquid water glass, and pumping the liquid water glass to an alkali storage tank in a reaction section for later use after the liquid water glass passes through a buffer tank and a liquid discharging tank and then a plate heat exchanger to recover waste heat (the waste heat is indirectly exchanged with fresh water which enters the hot water tank as dissolving water after being heated).
9. The preparation process of white carbon black according to claim 6, which is characterized by comprising the following steps: the detailed flow of the reaction section is as follows: firstly, pumping liquid sodium silicate in an alkali storage tank into a pre-preparation alkali tank, then pumping the liquid sodium silicate into a preparation tank from the pre-preparation alkali tank, adding water to adjust to a proper concentration, and pumping the prepared alkali tank for later use;
pumping the prepared liquid water glass into a reactor, introducing steam and hot water, adding concentrated sulfuric acid, controlling certain process conditions for reaction to obtain qualified reaction slurry, recovering waste heat of the reaction slurry by a tube-in-tube heat exchanger (indirectly exchanging heat with fresh water, and feeding the heated fresh water into a hot water tank of a reaction section to serve as reaction water) and feeding the reaction slurry into an intermediate tank for later use;
and finally, sending the reaction slurry to a plate-and-frame filter press for filtering, washing and blow-drying to form a white carbon black filter cake with the solid content of 20%, pulping the filter cake by a pulping machine, pumping a thick slurry tank in a drying section for later use, performing precipitation neutralization treatment on filtrate of the filter press and washing wastewater, discharging, and performing outward sale comprehensive utilization on calcium sulfate slag generated by precipitation, wherein the reaction formula of the reaction process is as follows: nNa2O mSiO2+ nH2SO4 → nNa2SO4+ mSiO2 nH 2O.
10. The preparation process of white carbon black according to claim 6, which is characterized by comprising the following steps: the detailed flow of the reaction section is as follows: pumping the white carbon black concentrated slurry in the concentrated slurry tank into a centrifugal spray head of a drying tower, contacting hot air from a hot-blast stove in the drying tower, evaporating water to obtain qualified white carbon black, carrying out gas-solid separation by using a cloth bag collector to recover a finished product, directly packaging the finished product collected by the cloth bag collector into a warehouse, discharging tail gas discharged from the cloth bag collector by using a high-exhaust cylinder of 20 meters, and returning finished product dust generated in the packaging process to the cloth bag collector;
flue gas generated in the coal burning process of the hot blast stove is subjected to indirect heat exchange with cold air in a heat exchange chamber, is subjected to cloth bag dust removal and then is discharged from a chimney with the height of twenty-five meters, and the cinder and dust collected by the hot blast stove are sprayed with water to be humidified for comprehensive utilization for sale.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115010142A (en) * | 2022-07-07 | 2022-09-06 | 凤阳常隆科技材料有限公司 | Energy-saving and environment-friendly liquid sodium silicate production equipment and method |
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| CN111924849A (en) * | 2020-08-13 | 2020-11-13 | 福建思科硅材料有限公司 | White carbon black production process |
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| JPH08169711A (en) * | 1994-12-15 | 1996-07-02 | Nitto Chem Ind Co Ltd | Production of high purity silica |
| CN101503193A (en) * | 2008-10-17 | 2009-08-12 | 株洲兴隆化工实业有限公司 | White carbon black drying system using fire coal circulating fluid bed hot-air furnace |
| CN202880907U (en) * | 2012-10-29 | 2013-04-17 | 无锡恒诚硅业有限公司 | Dried tail gas waste heat recovery system for white carbon black production |
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