阅读说明：本技术 一种针状焦的生产工艺方法 (Production process method of needle coke ) 是由 韩明栋 许胜军 宋德超 郑呈功 柴学磊 张传杰 霍克浩 于 2021-09-07 设计创作，主要内容包括：本发明提供一种针状焦的生产工艺方法,对于形成的针状焦进行后处理,针状焦在流动的情况下经过研磨结构,在研磨结构的作用下形成粉末状针状焦,同时添加吸附剂,吸附剂与粉末状针状焦以混合的方式向下游流动,同时向粉末状针状焦供应水流冲洗,以使得水流带走吸附的杂质。通过吸附剂的加入,其能够对于针状焦内的金属杂质或者其它类型的杂质进行去除,这样就对于针状焦进行了快速、批量化的后处理,使得其品质的得到了控制。并且,对于针状焦能够进行研磨处理,这样不仅能够更好地应用到后期的产品中省去了研磨步骤,并且在研磨步骤中通过吸附剂的加入而实现了去除杂质的目的,合二为一,提高了工作效率。(The invention provides a production process method of needle coke, which is characterized in that the formed needle coke is subjected to post-treatment, the needle coke passes through a grinding structure under the flowing condition, powdery needle coke is formed under the action of the grinding structure, meanwhile, an adsorbent is added, the adsorbent and the powdery needle coke flow downstream in a mixing manner, and meanwhile, water flow is supplied to the powdery needle coke for flushing, so that the water flow takes away adsorbed impurities. Through the addition of the adsorbent, metal impurities or other types of impurities in the needle coke can be removed, so that the needle coke is subjected to rapid and batch post-treatment, and the quality of the needle coke is controlled. And moreover, the needle coke can be ground, so that the needle coke can be better applied to products in the later period, the grinding step is omitted, the purpose of removing impurities is realized by adding the adsorbent in the grinding step, the two steps are combined into one, and the working efficiency is improved.)

1. A production process method of needle coke is characterized by comprising the following steps:

s1: pretreating needle coke raw material slurry oil;

s2: heating needle coke raw material slurry, distilling under the condition of negative pressure to obtain initial section oil, middle section oil and heavy section oil, and introducing the middle section oil into a needle coke forming tank;

s3: forming needle coke in the middle oil in the needle coke forming tank;

s4: and carrying out post-treatment on the formed needle coke, wherein the needle coke passes through a grinding structure under the flowing condition, powdery needle coke is formed under the action of the grinding structure, meanwhile, an adsorbent is added, the adsorbent and the powdery needle coke flow downstream in a mixed manner, and meanwhile, a water flow is supplied to the powdery needle coke for flushing, so that the water flow takes away adsorbed impurities.

2. The process for producing needle coke according to claim 1, wherein the preheating temperature of the needle coke raw material slurry in the pretreatment step is 200 ℃ to 250 ℃; and the heating temperature in the heating treatment step in S2 is 330 ℃ to 350 ℃.

3. The process for producing needle coke as claimed in claim 1, wherein said adsorbent is chitosan adsorbent.

4. The process for producing needle coke according to claim 3, wherein the chitosan adsorbent is carboxymethylated, hydroxyethylated, sulfonated product-modified chitosan.

5. The needle coke production process according to claim 1, wherein in the post-treatment step, the needle coke is fed into a hopper, a grinding structure is arranged below the hopper, the grinding structure comprises a driving motor, a gear transmission structure, a rotating rod, a bottom plate and a rotating sphere, the rotating sphere is rotatably arranged in a slot of the bottom plate, the bottom plate is positioned below the hopper, the rotating rod transversely penetrates through the bottom plate and is connected with the rotating sphere, a gap is formed between the rotating sphere and the inner wall of the slot, and the gap is used for blanking the needle coke; the production process method comprises the following steps: through driving motor provides power, gear drive structure transmits power to the rotary rod, the rotary rod then drives the rotary sphere of a plurality of positions and rotates when the rotation, then carries out continuous rotation in the slotted hole when the rotary sphere rotates to grind descending needle coke at this in-process, in order to obtain powdered needle coke.

6. The process for producing needle coke according to claim 5, wherein in the post-treatment step, the slots form an elongated channel structure in the vertical direction, and a multi-layered grinding structure is formed in the elongated channel in the vertical direction, and the width of the elongated structure is gradually reduced from the top to the bottom, and the rotating sphere of the grinding structure is kept constant from the top to the bottom, so that the gap is gradually reduced; in the steps of the process, the needle coke enters into the elongated channel structure, gradually moves downwards, the general diameter in the process is gradually reduced, and the grinding process of the needle coke is completed by means of the more and more compact and narrower space.

7. The needle coke production process method according to claim 6, wherein a buffer tank body is arranged at the lower position of the grinding structure, a spray pipe is arranged at one side of the top of the buffer tank body, the buffer tank body is provided with a lifting clamping upper plate and a lifting clamping lower plate, and a filter mesh is laid on the lifting clamping lower plate; the production process method comprises the following steps: the powdered needle coke after grinding enters into the buffer tank internally, then sprays rivers through the shower in order to soak powder material, makes the adsorbent enter into the aquatic simultaneously, then drags for the powder material in the buffer tank through the centre gripping action of centre gripping upper plate and centre gripping hypoplastron to moisture content and adsorbent filter, and centre gripping upper plate and centre gripping hypoplastron then are transferred to placing the station and carry out the below to powder material and gui ji.

Technical Field

The invention relates to a production process method of needle coke.

Background

Needle coke, also known as high-quality coke, is mainly used as HP and UHP graphite electrodes, lithium batteries and special carbon materials in electric furnace steelmaking. The coke-forming mechanism of needle coke essentially comprises the following steps: birth growth, encounter fusion, thickening aging and directional solidification.

The most used base material of the needle coke is catalytic cracking slurry oil, and the distilled fraction can be segmented after pretreatment and heating treatment of the slurry oil, and the fraction in the middle segment is collected and formed into the needle coke.

In order to achieve good quality control, the needle coke generally needs to select good slurry oil for reaction, the fractionation range of the selected needle coke is very narrow, and the requirements on the process are very strict, however, if the needle coke is completely implemented according to the standard, the cost is inevitably greatly increased, and thus the production of the needle coke in large batch is difficult to realize. For the common needle coke process, the formed needle coke material has high content of metal impurities, so that the application of the needle coke material to some occasions is limited; on the other hand, the needle coke is required to be formed into powder material when being used in some occasions, so that the needle coke can be used for specific application, and a process step is required to be added, so that the production cost of an enterprise is increased.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides the needle coke which has the advantages of simple and convenient process steps, and capability of crushing the products in the later period and removing impurities to ensure the quality.

The invention provides a production process method of needle coke, which comprises the following steps:

s1: pretreating needle coke raw material slurry oil;

s2: heating needle coke raw material slurry, distilling under the condition of negative pressure to obtain initial section oil, middle section oil and heavy section oil, and introducing the middle section oil into a needle coke forming tank;

s3: forming needle coke in the middle oil in the needle coke forming tank;

s4: and carrying out post-treatment on the formed needle coke, wherein the needle coke passes through a grinding structure under the flowing condition, powdery needle coke is formed under the action of the grinding structure, meanwhile, an adsorbent is added, the adsorbent and the powdery needle coke flow downstream in a mixed manner, and meanwhile, a water flow is supplied to the powdery needle coke for flushing, so that the water flow takes away adsorbed impurities.

The beneficial effect of above-mentioned scheme does: through the addition of the adsorbent, metal impurities or other types of impurities in the needle coke can be removed, so that the needle coke is subjected to rapid and batch post-treatment, and the quality of the needle coke is controlled. And moreover, the needle coke can be ground, so that the needle coke can be better applied to products in the later period, the grinding step is omitted, the purpose of removing impurities is realized by adding the adsorbent in the grinding step, the two steps are combined into one, and the working efficiency is improved.

In a preferred scheme, the preheating temperature of the needle coke raw material oil slurry in the pretreatment step is 200-250 ℃; and the heating temperature in the heating treatment step in S2 is 330 ℃ to 350 ℃. The material is brought to a preliminary temperature by a pre-treatment step and then subjected to a heating step to form a fractionation and the specific fractions are collected.

In a preferred embodiment, the adsorbent is chitosan adsorbent. Through repeated experiments, the water-soluble chitosan adsorbent can achieve a very good adsorption effect on metal impurities, is water-soluble, can be quickly removed after being mixed with water at a later stage, and is simple, convenient and efficient.

In a preferred embodiment, the chitosan adsorbent is carboxymethyl, hydroxyethylation, sulfonation product modified chitosan. The water solubility of the adsorbent modified in the way is further improved, and the adsorbent and metal impurities can be removed in the later period.

According to a preferable scheme, needle coke is added into a feeding hopper, a grinding structure is arranged below the feeding hopper and comprises a driving motor, a gear transmission structure, a rotating rod, a bottom plate and a rotating ball body, the rotating ball body is rotatably arranged in a slotted hole of the bottom plate, the bottom plate is positioned below the feeding hopper, the rotating rod transversely penetrates through the bottom plate and is connected with the rotating ball body, a gap is formed between the rotating ball body and the inner wall of the slotted hole, and the gap is used for blanking the needle coke; the production process method comprises the following steps: through driving motor provides power, gear drive structure transmits power to the rotary rod, the rotary rod then drives the rotary sphere of a plurality of positions and rotates when the rotation, then carries out continuous rotation in the slotted hole when the rotary sphere rotates to grind descending needle coke at this in-process, in order to obtain powdered needle coke.

In a preferred embodiment, in the post-processing step, the slot holes form an elongated channel structure in the vertical direction, and a multi-layer grinding structure is formed in the elongated channel in the vertical direction, and the width of the elongated structure is gradually reduced from top to bottom, and the rotating sphere of the grinding structure is kept constant from top to bottom, so that the gap is gradually reduced; in the steps of the process, the needle coke enters into the elongated channel structure, gradually moves downwards, the general diameter in the process is gradually reduced, and the grinding process of the needle coke is completed by means of the more and more compact and narrower space.

According to a preferable scheme, a buffer groove body is arranged at the lower position of the grinding structure, a spray pipe is arranged on one side of the top of the buffer groove body, the buffer groove body is provided with an upper lifting clamping plate and a lower lifting clamping plate, and a filter mesh is laid on the lower lifting clamping plate; the production process method comprises the following steps: the powdered needle coke after grinding enters into the buffer tank internally, then sprays rivers through the shower in order to soak powder material, makes the adsorbent enter into the aquatic simultaneously, then drags for the powder material in the buffer tank through the centre gripping action of centre gripping upper plate and centre gripping hypoplastron to moisture content and adsorbent filter, and centre gripping upper plate and centre gripping hypoplastron then are transferred to placing the station and carry out the below to powder material and gui ji.

Drawings

FIG. 1 is a schematic structural diagram of a process for producing needle coke.

FIG. 2 is a schematic diagram of the hopper and grinding structure of the needle coke production process.

FIG. 3 is a schematic structural view of an elongated channel structure of a process for producing needle coke.

FIG. 4 is a schematic view of the structure of the buffer tank of the process for producing needle coke.

Detailed Description

The first embodiment:

the invention provides a production process method of needle coke, which comprises the following steps:

s1: pretreating needle coke raw material slurry oil;

s2: heating needle coke raw material slurry, distilling under a negative pressure condition, namely distilling under the negative pressure through a tank body 1 in the figure 1 to obtain initial section oil, middle section oil and heavy section oil, and introducing the middle section oil into a needle coke forming tank 2;

s3: forming needle coke in the middle oil in the needle coke forming tank 2;

s4: and (2) carrying out post-treatment on the formed needle coke, wherein the needle coke passes through the grinding structure 3 under the flowing condition, powdery needle coke is formed under the action of the grinding structure 3, meanwhile, an adsorbent is added, the adsorbent and the powdery needle coke flow downstream in a mixed mode, and meanwhile, a water flow is supplied to the powdery needle coke for flushing, so that the water flow takes away adsorbed impurities.

Preheating the needle coke raw material oil slurry at 200-250 ℃ in the pretreatment step; and the heating temperature in the heating treatment step in S2 is 330 ℃ to 350 ℃. The adsorbent is chitosan adsorbent. The chitosan adsorbent is carboxymethyl, hydroxyethylation and sulfonated product modified chitosan.

Through the addition of the adsorbent, metal impurities or other types of impurities in the needle coke can be removed, so that the needle coke is subjected to rapid and batch post-treatment, and the quality of the needle coke is controlled. And the needle coke can be ground, so that the needle coke can be better applied to products in the later period, the grinding step is omitted, the purpose of removing impurities is realized by adding the adsorbent in the grinding step, the two steps are combined into one, and the working efficiency is improved. The material is brought to a preliminary temperature by a pre-treatment step and then subjected to a heating step to form a fractionation and the specific fractions are collected. The water-soluble chitosan adsorbent can have a very good metal impurity adsorption effect, is water-soluble, can be quickly removed after being mixed with water at a later stage, is simple and efficient, and can also adopt other conventional types of adsorbents to adsorb impurities such as metal ions.

Second embodiment:

preferably, as shown in fig. 2, the needle coke of the present embodiment is added into a hopper 10, a grinding structure 3 is disposed below the hopper 10, the grinding structure 3 includes a driving motor 11, a gear transmission structure 12, a rotating rod 13, a bottom plate 14 and a rotating sphere 15, the rotating sphere 15 is rotatably disposed in a slot 16 of the bottom plate 14, the bottom plate 14 is located at a position below the hopper 10, the rotating rod 13 transversely penetrates through the bottom plate 14 to be connected with the rotating sphere 15, a gap 17 is formed between the rotating sphere 15 and the inner wall of the slot 16, and the gap 17 is used for blanking the needle coke; the production process method comprises the following steps: the driving motor 11 provides power, the gear transmission structure 12 transmits the power to the rotating rod 13, the rotating rod 13 drives the rotating balls 15 at multiple positions to rotate when rotating, the rotating balls 15 continuously rotate in the slots 16 when rotating, and the descending needle coke is ground to descend in the process to obtain powdered needle coke.

In a specific application, needle coke in the loading hopper enters the position of the bottom plate 14, a small gap 17 is formed between the rotary sphere 15 and the slotted hole 16 of the bottom plate 14, the needle coke gradually descends from the gap 17, and the needle coke descending in the gap is contacted, squeezed and crushed under the rotation action of the rotary sphere 15, the needle coke is gradually crushed into powder, and the descending process of the needle coke is driven. In addition, an adsorbent may be added in the hopper and mixed to perform adsorption of metal impurities for the needle coke.

In the post-processing step, as shown in fig. 3, the slot 16 forms an elongated channel structure 21 in the vertical direction, and a multi-layer grinding structure is formed in the elongated channel structure 21 in the vertical direction, and the width of the elongated structure 21 is gradually reduced from top to bottom, and the rotary sphere 15 of the grinding structure is kept constant from top to bottom, so that the gap 17 is gradually reduced; in the steps of the process, the needle coke enters into the elongated channel structure 21, gradually moves downward, and in the process, the general diameter is gradually reduced, and the grinding process for the needle coke is completed by means of the more and more compact and narrower space. By this arrangement, the gap is gradually narrowed by the elongated passage structure, so that the needle coke is gradually crushed and crushed in the narrowed gap when descending, thereby obtaining a very good powder structure, and the descending speed of the needle coke is increased and the descending speed of the needle coke is also increased.

As shown in fig. 4, a buffer tank 31 is arranged at the lower position of the grinding structure of the embodiment, a spray pipe 32 is arranged at one side of the top of the buffer tank 31, the buffer tank 31 is provided with an upper lifting clamping plate 33 and a lower lifting clamping plate 34, and a filter mesh 35 is laid on the lower lifting clamping plate 34; the production process method comprises the following steps: the powdered needle coke after grinding enters into the buffer tank body 31, then sprays rivers through the shower 32 in order to soak the powder material, makes the adsorbent enter into aqueous simultaneously, then drags for the powder material in the buffer tank body through the centre gripping action of centre gripping upper plate 33 and centre gripping hypoplastron 34 to moisture content and adsorbent filter, and centre gripping upper plate 33 and centre gripping hypoplastron 34 then transfer to placing the station and carry out the below to the powder material and collect. Through the addition of water and the mixture of powder needle coke and adsorbent in the buffer tank body 31, just so through impurity such as water mixture adsorbent and metal to moisture just can get rid of after through filtering, and this time through the clamping effect of upper plate and hypoplastron, then can drag for and get with pressing from both sides solid needle coke faster, and filter moisture through the filter screen piece 35 of hypoplastron simultaneously, also have the small opening on the hypoplastron, just so realized collecting needle coke fast and the mesh of filtering moisture, and can realize serialization operation.

In another scheme, the rotary sphere is of a shell structure and consists of two detachable hemispherical shells, an adsorbent is filled in the shell structure, a material leakage hole is formed in each hemispherical shell, and the adsorbent in the shell structure is gradually leaked out through the material leakage hole in the rotating process of the rotary sphere, so that the material scattering function is well and uniformly realized, namely, the rotary sphere is gradually mixed with descending powder needle coke to be mixed, namely, the rotary sphere is uniformly mixed with descending powder in a gradual feeding mode under the condition of not stirring and mixing. And the bottom plate forms slot structure in the transverse direction, and rotatory spheroid and rotary rod can follow the separation of extracting in the transverse direction in the plug-in seam structure, and extract the inside supplementary adsorbent material of back casing, or the rotary rod is hollow structure, and the lateral part of rotary rod passes through input catheter and adsorbent pump and go into structural connection, the adsorbent passes through the pipe input to the rotary rod promptly, then enter into inside in order to realize quick, the continuous feeding adsorbent along the rotary rod, and need not to dismantle shell structure again.