CN212024783U

CN212024783U - Production device of hard carbon negative electrode material

Info

Publication number: CN212024783U
Application number: CN202020174614.2U
Authority: CN
Inventors: 陈雪; 和凤祥; 武全宇; 吕晗; 张勇; 刘书林; 屈滨
Original assignee: Sinosteel Anshan Research Institute of Thermo Energy Co Ltd
Current assignee: Sinosteel Anshan Research Institute of Thermo Energy Co Ltd
Priority date: 2020-02-17
Filing date: 2020-02-17
Publication date: 2020-11-27
Anticipated expiration: 2030-02-17

Abstract

The utility model provides a hard charcoal cathode material's apparatus for producing, includes pitch melting tank, resin melting tank, compounding jar, coking tower, distillation column, breaker, screening machine, roller kilns, high temperature retort, pitch melting tank and resin melting tank connect the compounding jar, the coking tower is connected to the compounding jar, the light looks extraction outlet of coking tower connects the distillation column, the play burnt mouth of coking tower is to the breaker pay-off, the breaker is to the screening machine pay-off, the screening machine is to the roller kilns pay-off, the roller kilns is to the high temperature retort pay-off. The utility model discloses melt the back with pitch raw materials and coke with resin misce bene, go out behind the burnt activation treatment that carries out, later carbomorphism obtains the hard charcoal negative electrode material that electrochemical performance is excellent, material stable in structure. The utility model discloses the hard charcoal negative electrode material of preparation, battery security performance is high, rate performance is good, the capacity is high, the circulation performance is good, the anti attenuation ability is outstanding, and simple feasible and continuous production of process method is the good raw materials of rate type, capacity type battery equipment.

Description

Production device of hard carbon negative electrode material

Technical Field

The utility model belongs to the negative electrode material field especially relates to a hard charcoal negative electrode material's apparatus for producing.

Background

With the increasing exhaustion of fossil fuels and the gradual deterioration of the environment, environmental protection measures and new energy development plans are drawn out from governments of various countries, and environment-friendly renewable energy sources are urgently needed to replace the traditional fossil energy sources which are used on a large scale at present. Therefore, the development of new energy becomes an important strategic industry of all countries to preempt the development of advanced points in the future. The lithium ion secondary battery is used as a green new energy battery, the development of the lithium ion secondary battery is from the 80 th of 20 th century, the lithium ion secondary battery is rapidly developed since the commercialization of the Japan Sony company in 1992, the lithium ion secondary battery is an internationally recognized ideal chemical energy source at present, has the advantages of high voltage, high energy density, long cycle life, small self-discharge rate, no memory effect, green environmental protection and the like, is widely applied to the fields of consumer electronics, electric tools, medical electronics and the like, is widely applied to the fields of pure electric vehicles, hybrid electric vehicles, electric bicycles, rail transit, aerospace, ships and naval vessels, industrial energy conservation, green buildings, space technology and the like, is a new generation of sustainable green energy, and particularly is a new energy automobile, and the market demand of a cathode material serving as the core of a power battery is increased day by day.

The hard carbon cathode material is used as a new cathode material and has higher Li due to the stereo cross-linked structure⁺The lithium ion battery cathode material has the characteristics of diffusion coefficient, wider lithium intercalation potential range, suitability for large-current charge and discharge, high rate performance, high specific capacity, low cost and the like, and is also considered to be the most potential lithium ion battery cathode material in the future. However, the hard carbon negative electrode materials in the current market are pyrolytic carbons with a structure close to amorphous carbon, and generally>The graphite is difficult to graphitize by treatment at 20000 ℃, the graphite is generally prepared by heat treatment of organic matters (such as phenolic resin, epoxy resin, organic compound pyrolytic carbon, polyglycitol PEA and the like), and the graphite has the problems of low cycle retention rate, serious lithium precipitation in cycle composition and the like, and is expensive and low in market utilization rate.

SUMMERY OF THE UTILITY MODEL

The utility model provides a hard charcoal cathode material's apparatus for producing, the pitch raw materials with the difference, through thick broken or directly melt the back and the resin get into the coking tower coking at compounding jar misce bene, go out in the broken screening back entering roller kilns of burnt back, carry out activation treatment, later get into the interior carbomorphism of high temperature carbomorphism stove and obtain the hard charcoal cathode material that electrochemical performance is excellent, material stable in structure. The utility model discloses the hard charcoal negative electrode material of preparation, battery security performance is high, rate performance is good, the capacity is high, the circulation performance is good, the anti attenuation ability is outstanding, and simple feasible and continuous production of process method is the good raw materials of rate type, capacity type battery equipment.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a hard charcoal cathode material's apparatus for producing, includes that pitch melts jar, resin melting jar, compounding jar, coking tower, distillation column, breaker, screening machine, roller kilns, high temperature retort, pitch melts jar and resin melting jar connection compounding jar, the coking tower is connected to the compounding jar, the light looks of coking tower is adopted the mouth and is connected the distillation column, the play burnt mouth of coking tower is to the breaker pay-off, and the breaker is to the screening machine pay-off, and the screening machine is to the roller kilns pay-off, and the roller kilns is to the high temperature retort pay-off.

The number of the coking towers is two.

Compared with the prior art, the beneficial effects of the utility model are that:

1) the hard carbon cathode material prepared by the utility model effectively considers the excellent cycle performance of the soft carbon cathode material and the higher rate performance of the hard carbon cathode material through the unique production process, and is charged and discharged under the condition of high power density, the material structure is stable, the anti-attenuation capability is outstanding, and the hard carbon cathode material can be widely applied to the field of various large battery materials;

2) the cathode material prepared by the utility model has excellent electrochemical performance, and can be widely applied to fast charging battery equipment, lithium ion battery equipment and sodium ion battery equipment;

3) the coking tower adopted by the utility model is a continuous production device, continuous production is realized, the maximization of productivity is ensured, and the economic benefit is considerable;

4) the activation process adopted by the activation process of the utility model is easy to realize, and the activation raw material has the characteristics of no secondary pollution, low cost and the like.

Drawings

Fig. 1 is a process flow diagram of the present invention.

In the figure: 1-soft asphalt raw material; 2-hard asphalt raw material; 3-resin raw material; 4-asphalt pulverizer; 5-bucket elevator; 6-a storage bin; 7-a screw feeder; 8-asphalt melting tank; 9-a resin melting tank; 10-a mixing tank; 11-1# coker; 12-2# coker; 13-a crusher; 14-screening machine; 15-roller kiln; 16-high temperature carbonization furnace; 17-finished product warehouse; 18-distillation column.

Detailed Description

The following embodiments are further described in detail:

the utility model provides a production technology of hard charcoal negative electrode material, with different pitch raw materials, through rough broken or directly melt back and resin at mixing tank 10 misce bene and get into the coking tower coking, go out in burnt crushing screening gets into roller kiln 15, carries out activation treatment, later gets into high temperature carbonization stove 16 interior carbonization and obtains hard charcoal negative electrode material, the hard charcoal negative electrode material specific capacity who makes is greater than 380mAh/g, first efficiency is greater than 80%, concrete process steps include:

1) pretreatment of raw materials: pumping the soft asphalt from the raw material tank by a pump, and directly feeding the soft asphalt into an asphalt melting tank for melting; after being crushed by a coarse crusher, the hard asphalt enters a storage bin 6 through a bucket elevator 4, and the hard asphalt is thrown into an asphalt melting tank 8 by a screw feeder 7 to be melted; the resin is pumped into a resin melting tank 9 by a pump to be melted; asphalt powder with the coarse breaking particle size of less than 1 cm;

2) mixing materials: the resin melting tank 9 and the asphalt melting tank 8 are mixed according to the mass ratio of resin: adding asphalt 1: 8-9 into a material mixing tank 10, and heating and stirring uniformly;

3) coking: pumping the materials in the mixing tank 10 into a coking tower through a pump for coking;

4) a distillation column: the distillate oil which is obtained by pressurizing and coking the coking tower enters the bottom of a distillation tower 18, and light phase oil and heavy phase oil are obtained by distillation; selling light phase oil; and the heavy phase oil is partially injected into a raw material tank area to be used as a special asphalt raw material.

5) Crushing and screening: after coke is formed in the coking tower, the raw coke enters a crusher to be crushed, and a sieving machine is used for sieving and grading;

6) and (3) activation: the classified coke powder enters a roller kiln 15 for activation treatment;

7) carbonizing: the powder material treated by the roller kiln 15 enters a high-temperature carbonization furnace 16 for carbonization;

8) and (3) finished product: and (5) feeding the carbonized material into a finished product bin through a belt gallery, and packaging.

The melting temperature of the asphalt in the step 1) is 100-200 ℃, the heating rate is 1-15 ℃/min, and the constant temperature time is 0.5-5 h.

The melting temperature of the resin in the step 1) is 50-150 ℃, the heating rate is 1-15 ℃/min, and the constant temperature time is 0.5-5 h.

The temperature of the material mixing tank is 50-250 ℃, and the stirring speed is 20-50 r/min.

The pressure of the coking tower is 0.1-3 Mpa, the coking temperature is 480-600 ℃, the heating rate is 1-30 ℃/min, and the constant temperature time is 1-8 h.

The crushing and screening granularity D50 in the step 5) is 10-25 μm.

The activating agent in the step 6) is water or carbon dioxide, the dosage of the activating agent is 0.5-5 mL/min, the activation temperature is 500-1200 ℃, the activation time is 0.1-10 h, and the activation process needs inert gas protection.

The carbonization temperature in the step 7) is 1000-2000 ℃, the temperature rise rate is 1-30 ℃/min, and the constant temperature time is 1-8 h.

As shown in fig. 1, a production device of hard carbon cathode material, including pitch melting tank 8, resin melting tank 9, mixing tank 10, coking tower, distillation column 18, breaker 13, screening machine 14, roller kiln 15, high temperature carbonization furnace 16, pitch melting tank 8 and resin melting tank 9 connect mixing tank 10, mixing tank 10 connects the coking tower, the light phase extraction mouth of coking tower connects distillation column 18, the play burnt mouth of coking tower is to the pay-off of breaker 13, and breaker 13 is to the pay-off of screening machine 14, and screening machine 14 is to roller kiln 15 pay-off, and roller kiln 15 is to high temperature carbonization furnace 16 pay-off.

The bucket elevator 4 is connected with a bin 6, and the bin 6 feeds hard asphalt raw materials to an asphalt melting tank 8 through a screw feeder 7. The soft asphalt raw material 1 directly enters an asphalt melting tank 8 to be melted, and the hard asphalt raw material 2 is coarsely broken, lifted into a bin 5 through a bucket and then enters the asphalt melting tank 8 through a screw feeder 7; the light phase extraction outlet of the coking tower is connected with the inlet of the distillation tower 18; the asphalt melting tank 8 and the resin melting tank 9 are provided with heaters and stirrers.

The number of the coking towers is two, namely a 1# coking tower 11 and a 2# coking tower 12; the coking and the coke discharging are alternately used, and continuous production is realized.

Example (b):

by adopting the production process of the hard carbon cathode material, 5 batches of main indexes are recorded in the table 1;

TABLE 1 batches of raw materials and their main indices

Batches of	Raw material asphalt	Softening Point (. degree. C.)	QI(wt％)	Ash content (wt%)
					1	Coal-series soft asphalt	31	2.50	0.08
2	Coal series hard asphalt	98	5.64	0.24
					3	Petroleum asphalt	42	Trace amount of	0.09
4	Imported petroleum asphalt	115	1.16	0.12
					5	Coal tar pitch: petroleum asphalt 1:1 blend	36	1.68	0.10

The coking drum process parameters in the examples are shown in Table 2:

TABLE 2 delayed coking Process Main parameters

The activation process parameters for each batch in the examples are shown in table 3:

TABLE 3 activation Process parameters

The parameters of each batch of carbonization process in the examples are shown in Table 4:

TABLE 4 carbonization Process parameters

The indexes of the negative electrode materials of the respective batches in the examples are shown in Table 5

TABLE 5 Main indices of negative electrode materials

Batches of	D50(μm)	d₀₀₂(nm)	Specific charging capacity (mAh/g)	First efficiency (%)
					1	12.25	3.6950	391	93.12
2	22.13	3.7476	396	85.22
					3	23.56	3.6514	383	92.15
4	17.42	3.6641	402	90.37
					5	20.53	3.6889	415	90.76

The above embodiments are implemented on the premise of the technical solution of the present invention, and are only embodiments of the foot rest of the present invention, which is not limited to other forms of the present invention, and any skilled person familiar with the art can easily modify the foot rest according to the technical essence and concept of the present invention, and the modifications and changes are also included in the protection scope of the present invention.

Claims

1. The utility model provides a hard charcoal cathode material's apparatus for producing, its characterized in that, melts jar, compounding jar, coking tower, distillation column, breaker, screening machine, roller kilns, high temperature retort including pitch, pitch melting jar and resin, the compounding jar is connected to pitch melting jar and resin melting jar, the coking tower is connected to the compounding jar, the light looks of coking tower is adopted the export and is connected the distillation column, the play burnt mouth of coking tower is to the breaker pay-off, and the breaker is to the screening machine pay-off, and the screening machine is to the roller kilns pay-off, and the roller kilns is to the pay-off of high temperature retort.

2. The apparatus for producing hard carbon negative electrode material according to claim 1, wherein the number of coking towers is two.