CN216236805U - Device for producing food-grade carbon black - Google Patents

Abstract

The utility model relates to a device for producing food-grade carbon black, which comprises a heating cylinder arranged obliquely, wherein a heating sleeve is arranged outside the heating cylinder, a stirring shaft is axially and rotatably arranged inside the heating cylinder, a plurality of connecting rods are fixed on the outer wall of the stirring shaft, a material copying plate arranged obliquely is fixed at the outer end of each connecting rod, a material conveying auger is connected to the higher end of the heating cylinder, a powder storage box is connected to a feed inlet of the material conveying auger, a material discharge pipe is arranged at the bottom of the lower end of the heating cylinder, an exhaust pipe is arranged at the top of the lower end of the heating cylinder, vent pipes are arranged at both ends and the middle part of the heating cylinder, the vent pipes are connected with uniform gas pipes, and the uniform gas pipes are connected with nitrogen inlet pipes. According to the utility model, the carbon black is heated in the heating cylinder, and nitrogen is introduced during heating, so that the heating cylinder is kept in a non-oxygen state all the time, the polycyclic aromatic hydrocarbon on the surface of the carbon black is thoroughly desorbed, and the application of the carbon black in the fields of daily necessities, food tableware, kitchen utensils and the like is realized.

Description

Device for producing food-grade carbon black

Technical Field

The utility model relates to a device for producing food-grade carbon black, and belongs to the technical field of carbon black production.

Background

Carbon black is an important chemical raw material, has strong reinforcing and wear-resisting properties, is used in rubber, and is widely applied to daily necessities such as printing ink, coating, paint and the like. Carbon black is also used in the fields of tableware, kitchen utensils and the like. Under such circumstances, carbon black is required to have low toxicity, low polycyclic aromatic hydrocarbon content, and to prevent damage to the human body.

The high polycyclic aromatic hydrocarbon content in the carbon black raw oil is beneficial to carbon black production, the precursor generated by the carbon black is a polycyclic aromatic hydrocarbon substance, and the polycyclic aromatic hydrocarbon can be extracted only under the action of solvents such as toluene and acetone due to difficult desorption of aromatic hydrocarbon compounds in the carbon black.

The method for removing polycyclic aromatic hydrocarbon by calcining carbon black is a relatively effective mode, but the carbon black has a low burning point, carbon black is easy to burn due to oxygen contained in the carbon black during treatment to generate carbon monoxide or carbon dioxide, and the desorption of polycyclic aromatic hydrocarbon is incomplete at a low temperature, so that the conventional high-temperature treatment mode cannot be implemented.

Therefore, it is an inevitable problem that a certain amount of polycyclic aromatic hydrocarbon remains in the carbon black. And polycyclic aromatic hydrocarbon substances have carcinogenic properties and belong to limited harmful substances of international organizations such as European Union, so how to develop a device for producing carbon black can reduce the polycyclic aromatic hydrocarbon content of the carbon black and produce carbon black products with lower polycyclic aromatic hydrocarbon content becomes a technical problem to be solved by the carbon black industry.

SUMMERY OF THE UTILITY MODEL

The utility model provides a device for producing food-grade carbon black, which solves the problems that the content of polycyclic aromatic hydrocarbon in the carbon black produced at present is high and the requirement of the food-grade carbon black is not met.

The utility model relates to a device for producing food-grade carbon black, which comprises a heating cylinder which is obliquely arranged, wherein a heating sleeve is arranged outside the heating cylinder, a heating medium inlet pipe is connected with the lower end of the bottom of the heating sleeve, a heating medium outlet pipe is connected with the higher end of the top of the heating sleeve, a stirring shaft is rotatably arranged inside the heating cylinder through a bearing along the axial direction, a bearing sealing cover is arranged at the outer end of the bearing, a sealing ring is arranged between the stirring shaft and the heating cylinder, a plurality of connecting rods are fixed on the outer wall of the stirring shaft, a stirring plate which is obliquely arranged is fixed at the outer end of each connecting rod, the stirring plate can be used for stirring and can also be used for pushing materials to be fed from left to right, a vibration motor can be additionally arranged at the bottom of the heating cylinder according to the situation, the connecting rods can be spirally arranged, so that a material stirring plate can better push the materials to be fed from left to right, a material conveying auger is connected with the higher end of the heating cylinder, and a shell of the material conveying auger is welded and sealed with a feed inlet of the heating cylinder, the feed inlet of defeated material auger is connected with stores up the powder case, and the lower one end bottom of cartridge heater is equipped with row material pipe, and the lower one end top of cartridge heater is equipped with the blast pipe, and the both ends and the middle part of cartridge heater all are equipped with the breather pipe, and the breather pipe is connected with even gas-supply pipe, and even gas-supply pipe is connected with nitrogen gas and advances the pipe. The nitrogen inlet pipe is provided with a flow valve and is connected with a nitrogen generator. Valves are arranged on the exhaust pipe, the heating medium inlet pipe, the heating medium outlet pipe, the discharge pipe and the nitrogen inlet pipe.

Preferably, be connected with the connecting pipe on the blast pipe, the connecting pipe is connected with the condenser pipe, the outside of condenser pipe is equipped with the condensate water sleeve pipe, the lower part of condensate water sleeve pipe is equipped with the condensation inlet tube, the sheathed tube upper portion of condensate water is equipped with the condensation outlet pipe, the connecting pipe is connected the one end bottom with the condenser pipe and is equipped with the fluid-discharge tube, the top of condenser pipe is equipped with the circulating pipe, be equipped with circulating fan on the circulating pipe, even gas-supply pipe is connected to the circulating pipe other end. The discharged gas can be conveniently condensed to form polycyclic aromatic hydrocarbon liquid, polycyclic aromatic hydrocarbon is recycled, and then nitrogen is recycled, so that resources are saved and the cost is reduced. The heating medium may be high pressure steam or heat transfer oil. Valves are arranged on the liquid discharge pipe and the circulating pipe.

Preferably, the circulating pipe is provided with an activated carbon adsorption tank. Polycyclic aromatic hydrocarbons in the circulating nitrogen can be better and more completely treated.

Preferably, the outside of heating jacket and cartridge heater is equipped with thermal insulation layer, and the connecting pipe sets up for the slope, and the blast pipe is connected to the higher one end of connecting pipe, and the condenser pipe is connected to the lower one end of connecting pipe, the polycyclic aromatic hydrocarbon liquid of conveniently discharging. The outer wall of the heating cylinder is provided with a thermometer for measuring the internal temperature. The discharge pipe can be connected with the receiving barrel, and the receiving barrel can be filled with nitrogen for nitrogen sealing and cooling.

Preferably, the one end of (mixing) shaft is connected with the cardan shaft, and the other end of cardan shaft connects the pivot, and the pivot rotates and installs on the bearing frame, and the bottom of bearing frame is fixed with the chassis, and the pivot other end passes through coupling joint agitator motor, and agitator motor fixes on the chassis.

The utility model has the following beneficial effects:

through heating the carbon black in the cartridge heater to let in nitrogen gas during the heating, keep not containing the thorough desorption that oxygen state had realized carbon black surperficial polycyclic aromatic hydrocarbon in the cartridge heater all the time, realized the application of carbon black in fields such as daily necessities, food tableware, kitchen utensil, through carrying out the polycyclic aromatic hydrocarbon liquid that condenses the recovery desorption to the exhaust, accomplish nitrogen gas recycle, reduce the cost, reduce extravagantly.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

in the figure: 1. a powder storage box; 2. a material conveying auger; 3. a heating cylinder; 4. a heating medium outlet pipe; 5. a breather pipe; 6. a uniform gas delivery pipe; 7. a nitrogen inlet pipe; 8. a circulation pipe; 9. a circulating fan; 10. activated carbon adsorption box, 11, condensation inlet tube, 12, condensation outlet tube, 13, condenser pipe, 14, condensation water sleeve, 15, connecting pipe, 16, blast pipe, 17, fluid-discharge tube, 18, cardan shaft, 19, agitator motor, 20, bearing seat, 21, chassis, 22, heat preservation insulating layer, 23, heating jacket, 24, material-copying plate, 25, connecting rod, 26, stirring shaft, 27, discharge pipe, 28, heating medium inlet pipe.

Detailed Description

The present invention will be further described with reference to the following examples.

As shown in figures 1 to 2, the device for producing food-grade carbon black comprises a heating cylinder 3 which is obliquely arranged, a heating sleeve 23 is arranged outside the heating cylinder 3, a heating medium inlet pipe 28 is connected to the lower end of the bottom of the heating sleeve 23, a heating medium outlet pipe 4 is connected to the higher end of the top of the heating sleeve 23, a stirring shaft 26 is axially and rotatably arranged inside the heating cylinder 3, a plurality of connecting rods 25 are fixed on the outer wall of the stirring shaft 26, a shoveling plate 24 which is obliquely arranged is fixed at the outer end of each connecting rod 25, a conveying auger 2 is connected to the higher end of the heating cylinder 3, a powder storage box 1 is connected to a feed inlet of the conveying auger 2, a discharge pipe 27 is arranged at the bottom of the lower end of the heating cylinder 3, an exhaust pipe 16 is arranged at the top of the lower end of the heating cylinder 3, vent pipes 5 are arranged at both ends and the middle of the heating cylinder 3, the vent pipes 5 are connected with uniform gas pipes 6, and the uniform gas inlet pipes 6 are connected with nitrogen inlet pipes 7.

Be connected with connecting pipe 15 on the blast pipe 16, connecting pipe 15 is connected with condenser pipe 13, the outside of condenser pipe 13 is equipped with condensate water sleeve pipe 14, the lower part of condensate water sleeve pipe 14 is equipped with condensation inlet tube 11, the upper portion of condensate water sleeve pipe 14 is equipped with condensation outlet pipe 12, connecting pipe 15 is connected the one end bottom with condenser pipe 13 and is equipped with fluid-discharge tube 17, the top of condenser pipe 13 is equipped with circulating pipe 8, be equipped with circulating fan 9 on the circulating pipe 8, even gas-supply pipe 6 is connected to the circulating pipe 8 other end.

The circulating pipe 8 is provided with an activated carbon adsorption tank 10.

The heating jacket 23 and the heating cylinder 3 are externally provided with a heat insulation layer 22, the connecting pipe 15 is obliquely arranged, the higher end of the connecting pipe 15 is connected with the exhaust pipe 16, and the lower end of the connecting pipe 15 is connected with the condensing pipe 13.

One end of the stirring shaft 26 is connected with a universal shaft 18, the other end of the universal shaft 18 is connected with a rotating shaft, the rotating shaft is rotatably installed on a bearing seat 20, a bottom frame 21 is fixed at the bottom of the bearing seat 20, the other end of the rotating shaft is connected with a stirring motor 19 through a coupler, and the stirring motor 19 is fixed on the bottom frame 21.

During operation, a valve of a nitrogen inlet pipe 7 is opened, a valve of a circulating pipe 8 and a valve of an exhaust pipe 16 are closed, a valve of a discharge pipe 27 is opened, then nitrogen enters a pipe 1 and enters the nitrogen, the nitrogen enters a heating cylinder 3 from an air pipe through an even air conveying pipe 6, air in the heating cylinder 3 is discharged, then a material conveying auger 2, a stirring motor 19, the valve of the exhaust pipe 16 and the valve of the circulating pipe 8 are started, a flow valve on the nitrogen inlet pipe 1 is reduced, carbon black powder in a powder storage box 1 is conveyed to the heating cylinder 3 by the material conveying auger 2, heating and calcining are carried out in an oxygen-free environment when feeding is carried out from left to right in the heating cylinder 3, polycyclic aromatic hydrocarbon impurities are volatilized and discharged from the exhaust pipe 16, then activated carbon adsorption is carried out after polycyclic aromatic hydrocarbon liquid is recovered through condensation, then the nitrogen is reused, a material in the heating cylinder 3 drives a material stirring plate 24 to rotate through a stirring shaft 26, and the carbon black powder is stirred, and the material feeding is promoted, and the carbon black without polycyclic aromatic hydrocarbon after calcination is discharged from the discharging pipe 27.

In conclusion, the carbon black is heated in the heating cylinder, and nitrogen is introduced during heating, so that the heating cylinder is kept in a state of no oxygen all the time, the polycyclic aromatic hydrocarbon on the surface of the carbon black is thoroughly desorbed, the application of the carbon black in the fields of daily necessities, food tableware, kitchen utensils and the like is realized, the discharged gas is condensed to recover the desorbed polycyclic aromatic hydrocarbon liquid, the nitrogen is recycled, the cost is reduced, and the waste is reduced.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are for convenience only to describe the present invention without requiring the present invention to be necessarily constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Claims (5)

1. The utility model provides a device of production food level carbon black which characterized in that: comprises a heating cylinder (3) which is obliquely arranged, a heating sleeve (23) is arranged outside the heating cylinder (3), the lower end of the bottom of the heating sleeve (23) is connected with a heating medium inlet pipe (28), the higher end of the top of the heating sleeve (23) is connected with a heating medium outlet pipe (4), a stirring shaft (26) is axially and rotatably arranged inside the heating cylinder (3), a plurality of connecting rods (25) are fixed on the outer wall of the stirring shaft (26), a shoveling plate (24) which is obliquely arranged is fixed at the outer end of each connecting rod (25), a conveying auger (2) is connected at the higher end of the heating cylinder (3), a feeding port of the conveying auger (2) is connected with a powder storage box (1), a discharging pipe (27) is arranged at the bottom of the lower end of the heating cylinder (3), an exhaust pipe (16) is arranged at the top of the lower end of the heating cylinder (3), and vent pipes (5) are arranged at the two ends and the middle part of the heating cylinder (3), the air pipe (5) is connected with a uniform air pipe (6), and the uniform air pipe (6) is connected with a nitrogen inlet pipe (7).

2. Apparatus for producing food grade carbon black according to claim 1, wherein: be connected with connecting pipe (15) on blast pipe (16), connecting pipe (15) are connected with condenser pipe (13), the outside of condenser pipe (13) is equipped with condensate water sleeve pipe (14), the lower part of condensate water sleeve pipe (14) is equipped with condensation inlet tube (11), the upper portion of condensate water sleeve pipe (14) is equipped with condensation outlet pipe (12), connecting pipe (15) are connected the one end bottom with condenser pipe (13) and are equipped with fluid-discharge tube (17), the top of condenser pipe (13) is equipped with circulating pipe (8), be equipped with circulating fan (9) on circulating pipe (8), even gas-supply pipe (6) is connected to the circulating pipe (8) other end.

3. Apparatus for producing food grade carbon black according to claim 2, wherein: an activated carbon adsorption tank (10) is arranged on the circulating pipe (8).

4. Apparatus for producing food grade carbon black according to claim 3, wherein: the heating jacket (23) and the heating cylinder (3) are externally provided with a heat insulation layer (22), the connecting pipe (15) is obliquely arranged, the higher end of the connecting pipe (15) is connected with the exhaust pipe (16), and the lower end of the connecting pipe (15) is connected with the condensing pipe (13).

5. Apparatus for producing food grade carbon black according to claim 4, wherein: one end of the stirring shaft (26) is connected with a universal shaft (18), the other end of the universal shaft (18) is connected with a rotating shaft, the rotating shaft is rotatably installed on a bearing seat (20), the bottom of the bearing seat (20) is fixedly provided with an underframe (21), the other end of the rotating shaft is connected with a stirring motor (19) through a coupler, and the stirring motor (19) is fixed on the underframe (21).

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