Process and equipment for continuous production of needle coke powder by multi-stage series crushing and shaping

Abstract

The process and equipment for continuously producing needle coke powder by multi-stage series crushing and shaping, which comprises a first-stage vortex rotor collision crushing and grading integrated machine, a second-stage vortex rotor collision crushing and grading integrated machine, a third-stage vortex rotor collision crushing and grading integrated machine, a fourth-stage vortex rotor collision crushing and grading integrated machine, a fifth-stage vortex rotor collision crushing and grading integrated machine and a shaping machine.

Description

[0001] The present application relates to a kind of multi-stage series of comminution, shaping continuous production needle coke powder process and equipment, belong to new material field.

[0002] Technical background: as the train by coal-fired steam turbine to fuel internal combustion engine, to the development trend of electrification, electric vehicle replaces fuel vehicle has been the trend, world developed countries have successively introduced the time table of fuel vehicle. Battery is the important component of electric vehicle, is also the key bottleneck of electric vehicle development. Needle coke powder is the important raw material of production lithium battery negative material. The traditional production needle coke powder process is mainly roll pressure gap intermittent comminution process, the needle coke powder produced by poor sphericity, there are a large number of particles with sharp angle, very easy to puncture diaphragm, cause positive and negative penetration, lead to battery scrap. In addition, traditional process belongs to intermittent operation, there is complex labor and dust pollution production environment problems of loading and unloading.

[0003] The purpose of the present application is to provide a kind of multi-stage series of comminution, shaping continuous production needle coke powder process and equipment, to solve the deficiency of existing process technology.

[0004] Invention content: the multi-stage series of comminution, shaping continuous production needle coke powder process of the present application includes the following steps:

[0005] (1) the raw material needle coke particle with the particle size of 1 to 5 millimeters is added from the upper part of the first vortex rotor collision comminution grading all-in-one machine, the needle coke particle is crushed in the first vortex rotor collision comminution grading all-in-one machine to form a mixture of particles of different sizes, the upper part of the pulverizer is directly connected with the classifier, the classifier is connected with the induced draft fan through the pipeline, cyclone separator and bag dust collector, under the action of wind force and classifier, the smaller particles are collected in the cyclone separator and bag dust collector through the classifier, and enter the shaping machine from the pipeline, the needle coke particles shaped in the shaping machine are also collected in the lower part of the cyclone separator and bag dust collector under the action of wind force, to obtain ideal spherical needle coke particles;

[0006] (2) the larger particles flow out from the lower part of the first vortex rotor collision comminution grading all-in-one machine under the action of gravity and classifier, and enter the upper part of the second vortex rotor collision comminution grading all-in-one machine under the action of wind force;Similarly, the needle coke particle is crushed in the second vortex rotor collision comminution grading all-in-one machine to form a mixture of particles of different sizes, the upper part of the pulverizer is directly connected with the classifier, the classifier is connected with the induced draft fan through the pipeline, cyclone separator and bag dust collector, under the action of wind force and classifier, the smaller particles are collected in the cyclone separator and bag dust collector through the classifier, and enter the shaping machine from the pipeline, the needle coke particles shaped in the shaping machine are also collected in the lower part of the cyclone separator and bag dust collector under the action of wind force, to obtain ideal spherical needle coke particles;

[0007] (3) Similarly, the larger particles flow out of the lower part of the secondary vortex-rotor collision, pulverization and classification integrated machine under the action of gravity and the classifier, and enter the upper part of the tertiary vortex-rotor collision, pulverization and classification integrated machine under the action of wind; similarly, the needle coke particles are pulverized in the tertiary vortex-rotor collision, pulverization and classification integrated machine to form a mixture of particles of different sizes, the upper part of the pulverizer is directly connected with the classifier, the classifier is connected with the induced draft fan through the cyclone separator and the bag-type dust collector through the pipeline, and under the action of wind and the classifier, the particles with smaller particle size are collected in the cyclone separator and the bag-type dust collector through the classifier and enter the shaper from the pipeline, the needle coke particles shaped in the shaper are also collected in the lower part of the cyclone separator and the bag-type dust collector under the action of wind, and ideal spherical needle coke particles are obtained; generally, after three to five stages of vortex-rotor collision, pulverization and classification integrated machine, the tailing of larger particles is very small, and the yield of more than 98% can be achieved in industry, and four stages of vortex-rotor collision, pulverization and classification integrated machine in series with one stage of shaper is taken as an example;

[0008] (4) After being pulverized by the above vortex-rotor collision, pulverization and classification integrated machines, the small particles of needle coke powder with a particle size reaching the requirement are respectively introduced into the shaper through the respective pipelines, the needle coke particles shaped in the shaper are collected in the lower part of the cyclone separator and the bag-type dust collector under the action of wind, and ideal spherical needle coke particles are obtained.

[0009] The present application has the following advantages:

[0010] 1. The present application realizes continuous pulverization and shaping, and the production process is relatively stable.

[0011] 2. Since there is no intermediate unloading and loading process, the production efficiency is relatively improved, and the production environment is better.

[0012] 3. Since the principle of roll-press grinding is natural cracking of particles under heavy pressure, the shape is irregular, and sharp-cornered particles are easily generated, which is not conducive to spheroidization; the pulverization mechanism of the vortex-rotor collision, pulverization and classification integrated machine is that particles collide with the rotor multiple times, and the pulverized particles are more close to spherical shape, which is easy to spheroidize, and the performance is more superior.

[0013] (5) The device of the process for producing needle coke powder in multiple stages in series by pulverizing and shaping continuously according to the application (taking a four-stage vortex-rotor collision pulverizing and grading all-in-one machine in series with a first-stage shaping machine as an example) is composed of a first-stage vortex-rotor collision pulverizing and grading all-in-one machine (1), a first-stage cyclone separator (2), a first-stage bag-type dust collector (3), a second-stage vortex-rotor collision pulverizing and grading all-in-one machine (4), a second-stage cyclone separator (5), a second-stage bag-type dust collector (6), a third-stage vortex-rotor collision pulverizing and grading all-in-one machine (7), a third-stage cyclone separator (8), a third-stage bag-type dust collector (9), a fourth-stage vortex-rotor collision pulverizing and grading all-in-one machine (10), a fourth-stage cyclone separator (11), a fourth-stage bag-type dust collector (12), a shaping machine (13), a cyclone separator (14), a fourth-stage bag-type dust collector (15), and induced draft fans (16), (17), (18), (19), (20), etc., wherein the first-stage vortex-rotor collision pulverizing and grading all-in-one machine (1) is connected with the first-stage cyclone separator (2) and the second-stage vortex-rotor collision pulverizing and grading all-in-one machine (4) through pipes, the first-stage cyclone separator (2) is connected with the first-stage bag-type dust collector (3) and the shaping machine (13) through pipes, the first-stage bag-type dust collector (3) is connected with the induced draft fan (16) and the shaping machine (13) through pipes, the second-stage vortex-rotor collision pulverizing and grading all-in-one machine (4) is connected with the second-stage cyclone separator (5) and the third-stage vortex-rotor collision pulverizing and grading all-in-one machine (7) through pipes, the second-stage cyclone separator (5) is connected with the second-stage bag-type dust collector (6) and the shaping machine (13) through pipes, the second-stage bag-type dust collector (6) is connected with the induced draft fan (17) and the shaping machine (13) through pipes, the third-stage vortex-rotor collision pulverizing and grading all-in-one machine (7) is connected with the third-stage cyclone separator (8) and the fourth-stage vortex-rotor collision pulverizing and grading all-in-one machine (10) through pipes, the third-stage cyclone separator (8) is connected with the third-stage bag-type dust collector (9) and the shaping machine (13) through pipes, the third-stage bag-type dust collector (9) is connected with the induced draft fan (18) and the shaping machine (13) through pipes, the fourth-stage vortex-rotor collision pulverizing and grading all-in-one machine (10) is connected with the fourth-stage cyclone separator (11) through pipes, the fourth-stage cyclone separator (11) is connected with the fourth-stage bag-type dust collector (12) and the shaping machine (13) through pipes, the fourth-stage bag-type dust collector (12) is connected with the induced draft fan (19) and the shaping machine (13) through pipes, the shaping machine (13) is connected with the cyclone separator (14) through pipes, the cyclone separator (14) is connected with the bag-type dust collector (15) through pipes, and the bag-type dust collector (15) is connected with the induced draft fan (20) through pipes.

[0014] The accompanying drawings are explained as follows:

[0015] The attached drawing is a schematic diagram of the process equipment of the present application, wherein (1) is a first-stage vortex-rotor impact-pulverizing and classifying integrated machine, (2) is a first-stage cyclone separator, (3) is a first-stage bag-type dust collector, (4) is a second-stage vortex-rotor impact-pulverizing and classifying integrated machine, (5) is a second-stage cyclone separator, (6) is a second-stage bag-type dust collector, (7) is a third-stage vortex-rotor impact-pulverizing and classifying integrated machine, (8) is a third-stage cyclone separator, (9) is a third-stage bag-type dust collector, (10) is a fourth-stage vortex-rotor impact-pulverizing and classifying integrated machine, (11) is a fourth-stage cyclone separator, (12) is a fourth-stage bag-type dust collector, (13) is a shaping machine, (14) is a cyclone separator, (15) is a bag-type dust collector, and (16), (17), (18), (19) and (20) are induced draft fans.

[0016] The present application is further described by way of the following examples: Example

[0017] (1) The raw needle coke particles with a particle size of about 1 to 5 mm are fed from the upper feeding bin of the first-stage vortex-rotor impact-pulverizing and classifying integrated machine. The needle coke particles are pulverized in the first-stage vortex-rotor impact-pulverizing and classifying integrated machine to form a mixture of particles of different sizes. The upper part of the pulverizer is directly connected to the classifier. The classifier is connected to the induced draft fan through a pipeline via a cyclone separator and a bag-type dust collector. Under the action of the wind force and the classifier, the particles with a smaller particle size are collected in the cyclone separator and the bag-type dust collector through the classifier and are fed into the shaping machine through the pipeline. The needle coke particles that are shaped in the shaping machine are also collected in the lower part of the cyclone separator and the bag-type dust collector under the action of the wind force, and ideal spherical needle coke particles are obtained.

[0018] (2) The above-mentioned larger particles flow out from the lower part of the first-stage vortex-rotor impact-pulverizing and classifying integrated machine under the action of gravity and the classifier. Under the action of the wind force of the induced draft fan, the particles are fed into the upper part of the second-stage vortex-rotor impact-pulverizing and classifying integrated machine. Similarly, the needle coke particles are pulverized in the second-stage vortex-rotor impact-pulverizing and classifying integrated machine to form a mixture of particles of different sizes. The upper part of the pulverizer is directly connected to the classifier. The classifier is connected to the induced draft fan through a pipeline via a cyclone separator and a bag-type dust collector. Under the action of the wind force and the classifier, the particles with a smaller particle size are collected in the cyclone separator and the bag-type dust collector through the classifier and are fed into the shaping machine through the pipeline. The needle coke particles that are shaped in the shaping machine are also collected in the lower part of the cyclone separator and the bag-type dust collector under the action of the wind force, and ideal spherical needle coke particles are obtained.

[0019] (3) The above-mentioned larger particles flow out from the lower part of the secondary vortex rotor collision pulverizing and classifying all-in-one machine under the action of gravity and the classifying machine, and enter the upper part of the tertiary vortex rotor collision pulverizing and classifying all-in-one machine under the action of wind. The needle coke particles are pulverized in the tertiary vortex rotor collision pulverizing and classifying all-in-one machine to form a mixture of particles of different sizes. The upper part of the pulverizer is directly connected with the classifying machine. The classifying machine is connected with the induced draft fan through a pipeline, a cyclone separator and a bag-type dust collector. Under the action of wind and the classifying machine, the smaller particles are collected in the cyclone separator and the bag-type dust collector through the classifying machine, and enter the shaping machine from the pipeline. The needle coke particles shaped in the shaping machine are also collected in the lower part of the cyclone separator and the bag-type dust collector under the action of wind, and ideal spherical needle coke particles are obtained.

[0020] (4) The above-mentioned larger particles flow out from the lower part of the tertiary vortex rotor collision pulverizing and classifying all-in-one machine under the action of gravity and the classifying machine, and enter the upper part of the quaternary vortex rotor collision pulverizing and classifying all-in-one machine under the action of the induced draft fan. The needle coke particles are pulverized in the quaternary vortex rotor collision pulverizing and classifying all-in-one machine to form a mixture of particles of different sizes. The upper part of the pulverizer is directly connected with the classifying machine. The classifying machine is connected with the induced draft fan through a pipeline, a cyclone separator and a bag-type dust collector. Under the action of wind and the classifying machine, the smaller particles are collected in the cyclone separator and the bag-type dust collector through the classifying machine, and enter the shaping machine from the pipeline. The needle coke particles shaped in the shaping machine are also collected in the lower part of the cyclone separator and the bag-type dust collector under the action of wind, and ideal spherical needle coke particles are obtained.

[0021] (6) After being pulverized by the vortex rotor collision pulverizing and classifying all-in-one machines of the above stages, the small particle needle coke powder with a particle size meeting the requirements (for example, D50 of about 18 μm) enters the shaping machine through the respective pipelines. The needle coke particles shaped in the shaping machine are also collected in the lower part of the cyclone separator and the bag-type dust collector under the action of wind, and ideal spherical needle coke particles are obtained.

Claims

1. A process for the continuous production of needle coke powder by multistage successive comminution and sizing, characterized in that: (1) the raw needle coke with particle size of 1-5mm is added from the upper feeding bin of the first-stage vortex-rotor collision, crushing and grading integrated machine, the needle coke is crushed in the first-stage vortex-rotor collision, crushing and grading integrated machine to form a mixture of particles with different sizes, the upper part of the crusher is directly connected with the classifier, the classifier is connected with the induced draft fan through a pipeline, a cyclone separator and a bag-type dust collector, under the action of wind force and the classifier, the particles with smaller particle size are collected in the cyclone separator and the bag-type dust collector through the classifier and enter the shaping machine through the pipeline, the needle coke particles shaped in the shaping machine are also collected at the lower part of the cyclone separator and the bag-type dust collector under the action of wind force, and ideal spherical needle coke particles are obtained; (2) the larger particles flow out from the lower part of the first-stage vortex-rotor collision, crushing and grading integrated machine under the action of gravity and the classifier, and enter the upper part of the second-stage vortex-rotor collision, crushing and grading integrated machine under the action of wind force; similarly, the needle coke is crushed in the second-stage vortex-rotor collision, crushing and grading integrated machine to form a mixture of particles with different sizes, the upper part of the crusher is directly connected with the classifier, the classifier is connected with the induced draft fan through a pipeline, a cyclone separator and a bag-type dust collector, under the action of wind force and the classifier, the particles with smaller particle size are collected in the cyclone separator and the bag-type dust collector through the classifier and enter the shaping machine through the pipeline, the needle coke particles shaped in the shaping machine are also collected at the lower part of the cyclone separator and the bag-type dust collector under the action of wind force, and ideal spherical needle coke particles are obtained; (3) similarly, the larger particles flow out from the lower part of the vortex-rotor collision, crushing and grading integrated machine under the action of gravity and the classifier, and enter the upper part of the next-stage vortex-rotor collision, crushing and grading integrated machine under the action of wind force; similarly, the needle coke is crushed in the next-stage vortex-rotor collision, crushing and grading integrated machine to form a mixture of particles with different sizes, the upper part of the crusher is directly connected with the classifier, the classifier is connected with the induced draft fan through a pipeline, a cyclone separator and a bag-type dust collector, under the action of wind force and the classifier, the particles with smaller particle size are collected in the cyclone separator and the bag-type dust collector through the classifier and enter the shaping machine through the pipeline, the needle coke particles shaped in the shaping machine are also collected at the lower part of the cyclone separator and the bag-type dust collector under the action of wind force, and ideal spherical needle coke particles are obtained; (4) the vortex-rotor collision, crushing and grading integrated machines are connected in series and are two to nine stages, the shaping machines are one to five stages, the total yield can reach more than 98% after the needle coke is crushed by three to five stages of vortex-rotor collision, crushing and grading integrated machines and one to two stages of shaping machines are connected in series; (5) the small needle coke particles with required particle size are collected in the cyclone separator and the bag-type dust collector through the pipeline after being crushed by the vortex-rotor collision, crushing and grading integrated machines, the needle coke particles shaped in the shaping machine are also collected at the lower part of the cyclone separator and the bag-type dust collector under the action of wind force, and ideal spherical needle coke particles are obtained.

2. The apparatus of the process for the continuous production of needle coke powders by multistage series comminution and sizing according to claim 1, characterized in that, The four-stage vortex-rotor collision, crushing, and grading integrated machine is connected in series with a first shaping machine, and is composed of a first vortex-rotor collision, crushing, and grading integrated machine (1), a first cyclone separator (2), a first bag-type dust collector (3), a second vortex-rotor collision, crushing, and grading integrated machine (4), a second cyclone separator (5), a second bag-type dust collector (6), a third vortex-rotor collision, crushing, and grading integrated machine (7), a third cyclone separator (8), a third bag-type dust collector (9), a fourth vortex-rotor collision, crushing, and grading integrated machine (10), a fourth cyclone separator (11), a fourth bag-type dust collector (12), a shaping machine (13), a cyclone separator (14), a bag-type dust collector (15), an induced draft fan (16), an induced draft fan (17), an induced draft fan (18), an induced draft fan (19), and an induced draft fan (20). The first vortex-rotor collision, crushing, and grading integrated machine (1) is connected to the first cyclone separator (2) and the second vortex-rotor collision, crushing, and grading integrated machine (4) through pipes. The first cyclone separator (2) is connected to the first bag-type dust collector (3) and the shaping machine (13) through pipes. The first bag-type dust collector (3) is connected to the induced draft fan (16) and the shaping machine (13) through pipes. The second vortex-rotor collision, crushing, and grading integrated machine (4) is connected to the second cyclone separator (5) and the third vortex-rotor collision, crushing, and grading integrated machine (7) through pipes. The second cyclone separator (5) is connected to the second bag-type dust collector (6) and the shaping machine (13) through pipes. The second bag-type dust collector (6) is connected to the induced draft fan (17) and the shaping machine (13) through pipes. The third vortex-rotor collision, crushing, and grading integrated machine (7) is connected to the third cyclone separator (8) and the fourth vortex-rotor collision, crushing, and grading integrated machine (10) through pipes. The third cyclone separator (8) is connected to the third bag-type dust collector (9) and the shaping machine (13) through pipes. The third bag-type dust collector (9) is connected to the induced draft fan (18) and the shaping machine (13) through pipes. The fourth vortex-rotor collision, crushing, and grading integrated machine (10) is connected to the fourth cyclone separator (11) through pipes. The fourth cyclone separator (11) is connected to the fourth bag-type dust collector (12) and the shaping machine (13) through pipes. The fourth bag-type dust collector (12) is connected to the induced draft fan (19) and the shaping machine (13) through pipes. The shaping machine (13) is connected to the cyclone separator (14) through pipes. The cyclone separator (14) is connected to the bag-type dust collector (15) through pipes. The bag-type dust collector (15) is connected to the induced draft fan (20) through pipes.

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