JPS5910718B2 - How to dry wet pitch - Google Patents

How to dry wet pitch

Info

Publication number
JPS5910718B2
JPS5910718B2 JP4152478A JP4152478A JPS5910718B2 JP S5910718 B2 JPS5910718 B2 JP S5910718B2 JP 4152478 A JP4152478 A JP 4152478A JP 4152478 A JP4152478 A JP 4152478A JP S5910718 B2 JPS5910718 B2 JP S5910718B2
Authority
JP
Japan
Prior art keywords
pitch
hot air
wet
dryer
dust
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP4152478A
Other languages
Japanese (ja)
Other versions
JPS54133513A (en
Inventor
義雄 石原
利夫 徳重
幸男 酒村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Aluminum Smelting Co
Original Assignee
Sumitomo Aluminum Smelting Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Aluminum Smelting Co filed Critical Sumitomo Aluminum Smelting Co
Priority to JP4152478A priority Critical patent/JPS5910718B2/en
Publication of JPS54133513A publication Critical patent/JPS54133513A/en
Publication of JPS5910718B2 publication Critical patent/JPS5910718B2/en
Expired legal-status Critical Current

Links

Description

【発明の詳細な説明】 本発明は湿潤ピッチの乾燥方法、とりわけ攪拌式熱風乾
燥器を用い湿潤ピッチを炭素質成形体製造用バインダー
として適する水分含有率に連続的に乾燥する方法に関す
るものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for drying wet pitch, and particularly to a method for continuously drying wet pitch using an agitating hot air dryer to a moisture content suitable as a binder for producing a carbonaceous molded body. .

従来、炭素質成形体、特に炭素質電極ブロックの製造に
当っては、バインダーとして石油ピッチまたはコールタ
ールピッチが使用されているが、炭素質成形体製造時の
混捏過程においてピッチが水分を多量に含有していると
骨材となるコークス類とバインダーとなるピッチとの混
捏状態が悪化することが知られている。
Conventionally, petroleum pitch or coal tar pitch has been used as a binder in the production of carbonaceous compacts, especially carbonaceous electrode blocks. It is known that if it is contained, the mixing condition of coke, which serves as an aggregate, and pitch, which serves as a binder, deteriorates.

特に連続式混捏機を使用する場合にはピッチの含有水分
の変動により混捏機内の熱バランスがくずれ、ピッチの
溶融状態が一定せず混捏機を出るペーストの性状が不安
定となり、満足しうる炭素質成形体の製造が達成しえな
いという問題を生ずる。
In particular, when using a continuous kneading machine, the heat balance inside the kneading machine is disrupted due to fluctuations in the moisture content of the pitch, and the molten state of the pitch is not constant, making the properties of the paste that exits the kneading machine unstable. The problem arises that it is not possible to produce a quality molded body.

またピッチの含有水分が多すぎると、ピッチの溶融が早
急には完了せず、骨材コークス類などとピッチとの見掛
容量が異状に増大し、混捏機に過負荷を及ぼし、電動機
などを損壊する原因にもなる。
In addition, if the pitch contains too much moisture, the melting of the pitch will not be completed quickly, and the apparent capacity of the pitch and aggregate coke will increase abnormally, overloading the kneading machine and causing the electric motor etc. It may also cause damage.

以上のような理由から今日では炭素質成形体のバインダ
ーとして使用するピッチはできる限り乾燥したもの、一
般には水分含有率0.5重量%以下のものが使用されて
いる。
For the above-mentioned reasons, pitch used as a binder for carbonaceous molded bodies is now as dry as possible, and generally has a moisture content of 0.5% by weight or less.

他方昭和46年特定化学物質等障害予防規則が制定され
、作業環境の改善が強く要求されるようになって以来、
従来のような乾燥状態のピッチをばら積みで多量に輸送
することが難し《なった。
On the other hand, since the Ordinance for Prevention of Hazards Due to Specified Chemical Substances was enacted in 1971, and improvements in the working environment have been strongly required,
It has become difficult to transport large quantities of dry pitch in bulk as in the past.

ピッチの輸送時におげる発塵防止方法として(1)溶融
状態にしたピンチをパイプ輸送する方式(2)乾燥ピッ
チをコンテナ輸送する方式(3)発塵防止のためピッチ
を湿潤して輸送する方式 等が検討された。
Methods to prevent dust generation during pitch transportation include (1) transporting molten pinch through a pipe, (2) transporting dry pitch in a container, and (3) transporting pitch in a moist state to prevent dust generation. Methods, etc. were considered.

(1)の溶融状態にしたピッチをパイプ輸送する方式と
はピッチを軟化点以上に加熱し、流動状態になったピッ
チをパイプラインで輸送する方法であるが、この場合に
はピッチ製造工場とピッチを使用する工場とが近距離に
ある場合を除いては設備費が嵩み汎用性のある方法とは
いえない。
The method (1) of transporting molten pitch through a pipe is to heat the pitch above its softening point and transport the fluidized pitch through a pipeline. Unless the factory where the pitch is used is located close to the factory, the equipment cost is high and it cannot be said to be a versatile method.

(2)のコンテナ輸送方式では乾燥ピッチのコンテナへ
の積込み、荷降ろし時に発生する粉塵を防止することが
難かし<、シかも多量の輸送には適さないという欠点が
ある。
The container transportation method (2) has the disadvantage that it is difficult to prevent dust from being generated during loading and unloading into dry-pitch containers, and it is not suitable for large-volume transportation.

このため(3)の湿潤ピッチの輸送が簡便にして、発塵
予防の効果の点から汎用される傾向にある。
For this reason, the method (3) tends to be widely used because it simplifies the transportation of wet pitch and is effective in preventing dust generation.

この方式はピッチに水をスプレイするなどして湿潤状態
にしてピッチを輸送する方法であって、従来通りのばら
積み輸送が可能で、設備費が安価であるという反面、炭
素質成形体製造時に湿潤ピッチを好ましい水分含有率ま
で乾燥する必要がある。
This method is a method of transporting the pitch in a moist state by spraying water on it, and while it is possible to transport the pitch in bulk as before and has low equipment costs, it is It is necessary to dry the pitch to the desired moisture content.

湿潤物質を熱風により乾燥することは広く採用されてい
る手段であるが、ピッチのごとき軟化点の低い物質では
乾燥中に軟化、溶融して設備、配管などを閉塞する懸念
があり、現状では湿潤ピッチを風乾場に広げ、自然乾燥
する方法が採用されている。
Drying wet materials with hot air is a widely used method, but there is a concern that materials with low softening points, such as pitch, may soften and melt during drying and clog equipment, piping, etc. The method used is to spread the pitch in an air-drying field and let it dry naturally.

この方法では広い敷地を要するばかりではなく、水分含
有量のコントロールの点ではかならずしも満足しうるも
のとはいえない。
This method not only requires a large area, but also cannot be said to be completely satisfactory in terms of moisture content control.

か〜る情況に鑑み、従来法の不都合を解決すべく鋭意検
討を行なった結果、湿潤ピッチを目的とする水分含有率
以下、例えば0.5%以下の水分量に乾燥するためには
攪拌式熱風乾燥器において湿潤ピッチの充填率を制御し
短時間熱風と接触させ、同時に排出される熱風に同伴さ
れるピッチ粉塵量を供給される湿潤ピッチの乾燥重量の
20%以下とすることにより連続的に湿潤ピッチを操業
上のトラブルなしに乾燥しうることを見い出し、本発明
の方法を完成した。
In view of the above circumstances, we conducted intensive studies to resolve the inconveniences of conventional methods, and found that a stirring method was used to dry the wet pitch to a moisture content below the desired moisture content, for example 0.5% or below. Continuous drying is achieved by controlling the filling rate of wet pitch in a hot air dryer, bringing it into contact with hot air for a short period of time, and at the same time controlling the amount of pitch dust entrained in the hot air to be 20% or less of the dry weight of the supplied wet pitch. They discovered that wet pitch can be dried without any operational trouble, and completed the method of the present invention.

すなわち本発明は湿潤ピッチを連続的に乾燥するに当り
、湿潤ピッチを攪拌、移動させうる手段を有する熱風乾
燥器の一端より充填率3%以下となるとと《湿潤ピッチ
を供給し、攪拌されつつ移動する湿潤ピッチを該ピッチ
の軟化点プラス10℃以下50℃以上の熱風と該ピッチ
の滞留時間が約5秒〜5分の範囲で接触させて乾燥し、
乾燥されたピッチを該乾燥器の他端より導出し、他方ピ
ツチ粉塵を含む熱風排気は集塵装置に導入し、ピッチ粉
塵を分離捕集し、粉塵量が供給される湿潤ピッチの乾燥
重量の20%以下となるごとく制御する湿潤ピッチの乾
燥方法を提供するものである。
In other words, when the present invention continuously dries the wet pitch, if the filling rate becomes 3% or less from one end of the hot air dryer having a means for stirring and moving the wet pitch, << the wet pitch is supplied, and while being stirred. Drying the moving wet pitch by contacting it with hot air at a temperature of 10° C. or higher and 50° C. or higher above the softening point of the pitch for a residence time of about 5 seconds to 5 minutes,
The dried pitch is led out from the other end of the dryer, and the hot air exhaust containing pitch dust is introduced into a dust collector, where the pitch dust is separated and collected, and the amount of dust is calculated based on the dry weight of the supplied wet pitch. The present invention provides a method for drying wet pitch in which the wet pitch is controlled to be 20% or less.

以下本発明方法を詳細に説明する。The method of the present invention will be explained in detail below.

本発明の実施対象となる湿潤ピッチの水分含有率につい
ては特に制限されるものではないが、一般には5重量%
(乾燥ピッチ基準、以下同じ)以下のものが対象となる
The moisture content of the wet pitch that is the subject of the present invention is not particularly limited, but is generally 5% by weight.
(Dry pitch standard, the same applies hereinafter) The following items are subject to the test.

水分含有率が5重量%以上であっても滞留時間は多少長
く取る必要があるが本発明の目的を容易に達成すること
ができる。
Even if the water content is 5% by weight or more, the residence time must be somewhat longer, but the object of the present invention can be easily achieved.

他方乾燥ピッチの水分含有率はピッチの用途によって多
少ことなるが、例えば炭素質成形体、炭素質電極ブロッ
ク製造用バインダーとして望まれているピッチの水分含
有率0.5重量%以下に倣って、.本発明の実施に当っ
ては水分含有率0.5重量%以下の乾燥ピッチを安定し
て連続的に取得することを目的とするものである。
On the other hand, the moisture content of the dry pitch varies somewhat depending on the use of the pitch, but for example, following the moisture content of pitch of 0.5% by weight or less, which is desired as a binder for manufacturing carbonaceous molded bodies and carbonaceous electrode blocks, .. The purpose of carrying out the present invention is to stably and continuously obtain dry pitch with a moisture content of 0.5% by weight or less.

本発明において使用する湿潤ピッチを攪拌、移動させう
る手段を有する熱風乾燥器としては例えば熱風受熱みぞ
型攪拌乾燥器などのごとく一端に湿潤ピッチ並びに熱風
導入口を有し、他端に乾燥ピッチと排気熱風とを分離し
て抜き出すそれぞれの排出口を有するものであって、被
乾燥材料の移動方向に平行した回転軸を有する攪拌翼を
設けたものなどが好適である。
A hot air dryer having a means for stirring and moving the wet pitch used in the present invention may have a wet pitch and a hot air inlet at one end, such as a hot air receiving groove type stirring dryer, and a dry pitch at the other end. It is preferable to have a separate discharge port for separating and extracting the hot exhaust air, and a stirring blade having a rotation axis parallel to the moving direction of the material to be dried.

湿潤ピッチと熱風との接触は上記の装置においては並流
式ではあるが、向流式の接触も可能である。
Although the contact between the wet pitch and the hot air is cocurrent in the above device, countercurrent contact is also possible.

被乾燥材料の搬送手段としては攪拌翼自体に搬送機能を
もたせてもよく、別に搬送のみを目的とする機能を設け
たもの、例えば傾転回転式の乾燥器などが使用できる。
As the means for conveying the material to be dried, the stirring blade itself may be provided with a conveyance function, or a means provided with a function solely for the purpose of conveyance, such as a tilting rotary type dryer, may be used.

攪拌翼は乾燥器に供給され移動するピッチを一様に攪拌
して熱風と緊密に接触せしめるよう適当な間隔をもって
設けられる。
The stirring blades are provided at appropriate intervals so as to uniformly stir the moving pitch supplied to the dryer and bring it into close contact with the hot air.

他方被処理材であるピッチは脆《攪拌翼の機械的衝撃に
より解砕されるため排気熱風に同伴されるピッチ粉塵量
を観測して回転数を制御する必要がある。
On the other hand, pitch, which is the material to be treated, is brittle and is crushed by the mechanical impact of the stirring blades, so it is necessary to control the rotation speed by monitoring the amount of pitch dust entrained in the hot exhaust air.

ピッチ粉塵量が過剰となると装置、配管などの閉塞の原
因となり、連続作業を困難にするため本発明の方法にお
いてはピッチ粉塵を含む排気熱風を集塵装置に導入して
分離捕集し、取得される粉塵量が供給される湿潤ピッチ
の乾燥重量の20%以下となるごとく攪拌翼の回転数を
調整する必要がある。
Excessive amount of pitch dust can cause blockage of equipment, piping, etc., making continuous work difficult. Therefore, in the method of the present invention, exhaust hot air containing pitch dust is introduced into a dust collector to separate and collect it. It is necessary to adjust the number of revolutions of the stirring blade so that the amount of dust is 20% or less of the dry weight of the wet pitch to be supplied.

回転数はピッチの品質、粒度などにより一概に定めるこ
とはできず、捕集されるピッチ粉塵量で制御するのが適
当であるが、一般には約50〜400r.p.m程度の
速度で攪拌翼が回転される。
The rotation speed cannot be determined unconditionally depending on pitch quality, particle size, etc., and it is appropriate to control it by the amount of pitch dust collected, but it is generally about 50 to 400 r.p.m. p. The stirring blades are rotated at a speed of about m.

本発明方法の実施に当っては上記のごとき攪拌式熱風乾
燥器に湿潤ピッチを導入する。
In carrying out the method of the present invention, wet pitch is introduced into the agitating hot air dryer as described above.

湿潤ピッチは間欠的に導入してもよいが連続的に導入供
給するのが適当である。
Although the wet pitch may be introduced intermittently, it is appropriate to introduce and supply it continuously.

乾燥器内の被処理材の充填率はピンチが十分に攪拌され
均一に熱風と接触させることができるような空隙を有す
る状態であればよいが、特に短時間に効率的な乾燥を行
なうためには乾燥器の内容量の3%以下、さらに好まし
《は1%以下程度の充填率で操作される。
The filling rate of the material to be treated in the dryer may be such that it has enough voids to allow the pinch to be sufficiently agitated and evenly brought into contact with the hot air. The dryer is operated at a filling rate of 3% or less of the internal capacity of the dryer, more preferably 1% or less of the content of the dryer.

被処理材の乾燥器内平均滞留時間は一般には熱風の温度
、被処理材の水分量、充填率など多くの要素によって影
響されるが本発明においては被処理材料がピッチであり
、一定の融点をもつ物質ではなく加熱とともに軟化、溶
融する性質を持つものであるため、係るピッチが軟化溶
融して装置に粘着してトラブルを発生させることなく乾
燥を行なうためには熱風の温度管理とともに熱風とピッ
チとの接触時間をできるだけ短かくすることが望ましく
、本発明の方法の実施に当っては約5秒〜5分程度の範
囲において熱風温度との関係で選択するのが適当である
The average residence time of the material to be treated in the dryer is generally influenced by many factors such as the temperature of the hot air, the moisture content of the material to be treated, and the filling rate. Since the pitch is not a material that has the property of softening and melting when heated, it is necessary to control the temperature of the hot air and to dry the pitch without causing troubles such as softening and melting and sticking to the equipment. It is desirable to make the contact time with the pitch as short as possible, and when carrying out the method of the present invention, it is appropriate to select a time in the range of about 5 seconds to 5 minutes depending on the hot air temperature.

他方乾燥のだめの熱源として乾燥器に導入される熱風は
、処理されるピッチの軟化点プラス10℃以下、好まし
くはピッチの軟化点以下50℃以上の温度を有するもの
であって、一般には熱風空塔速度約3m/sec以下で
乾燥器内を通過させる。
On the other hand, the hot air introduced into the dryer as a heat source for the drying tank has a temperature of 10°C or less above the softening point of the pitch to be treated, preferably 50°C or more below the softening point of the pitch. Pass through the dryer at a column speed of about 3 m/sec or less.

ピッチの軟化点測定法としてはいろいろの方法が提案さ
れており、測定結果もその方法によって異なるが、本発
明においては、JIS K 2425に定められた方法
によって得られる軟化点をピッチの軟化点として定義す
るものである。
Various methods have been proposed to measure the softening point of pitch, and the measurement results vary depending on the method, but in the present invention, the softening point obtained by the method specified in JIS K 2425 is used as the softening point of pitch. It is defined.

熱風温度がピンチの軟化点プラス10℃よりも高いと例
え接触時間が短かくともピッチが軟化して溶着を起こす
懸念があり、装置の故障、補修の頻度が多くなり望まし
くない。
If the hot air temperature is higher than the pinch softening point plus 10° C., even if the contact time is short, there is a risk of softening the pitch and causing welding, which is undesirable as it increases the frequency of equipment failure and repair.

一方50℃よりも低い温度の熱風では水分の蒸発速度が
遅くなり、乾燥時間が長くなり好ましくない。
On the other hand, hot air at a temperature lower than 50° C. is undesirable because the rate of moisture evaporation becomes slow and the drying time becomes longer.

熱風の空塔速度はピッチが解砕されて生ずるピツチ粉塵
を同伴しうる容量に関係する。
The superficial velocity of the hot air is related to the capacity with which it can entrain pitch dust created by disintegration of pitch.

すなわち空塔速度が高すぎると過剰のピッチ粉塵が排気
にともなって集塵装置に移行する。
That is, if the superficial velocity is too high, excess pitch dust will be transferred to the dust collector along with the exhaust air.

以上により乾燥器に入る湿潤ピッチは攪拌、解砕されつ
つ熱風と直接接触されて乾燥され、乾燥器出口端で乾燥
されたピッチが排出される。
As described above, the wet pitch entering the dryer is agitated and crushed while being brought into direct contact with hot air and dried, and the dried pitch is discharged at the outlet end of the dryer.

他方乾燥器を出たピッチ粉塵を含む排気は集塵装置に導
入される。
On the other hand, the exhaust gas containing pitch dust leaving the dryer is introduced into a dust collector.

集塵装置については特に制限はないが、例えばサイクロ
ンなどが用いられる。
There are no particular restrictions on the dust collector, but a cyclone or the like may be used, for example.

集塵装置によって捕集されるピッチ粉塵量は本発明の方
法を実施するに当って、連続的に故障を引き起すことな
く、かつ安定して湿潤ピッチの乾燥を行なうためコント
ロールする必要のある要因であり、本発明においては供
給される湿潤ピッチの乾燥重量の20%以下とする必要
がある。
The amount of pitch dust collected by the dust collector is a factor that needs to be controlled when carrying out the method of the present invention in order to continuously dry wet pitch without causing failure and in a stable manner. Therefore, in the present invention, it needs to be 20% or less of the dry weight of the wet pitch supplied.

すなわち粉塵量が多くなると装置、配管に付着溶着して
閉塞、故障の原因となり、一定品質の乾燥ピッチの取得
が困難となる。
That is, when the amount of dust increases, it adheres and welds to equipment and piping, causing blockages and failures, making it difficult to obtain dry pitch of constant quality.

以下本発明方法を図面によってさらに説明するが、これ
は本発明方法の一実施態様を具体化したものであり、こ
れによって本発明は何等限定されるものではない。
The method of the present invention will be further explained below with reference to the drawings, but these are embodiments of one embodiment of the method of the present invention, and the present invention is not limited thereby.

第1図は攪拌式熱風乾燥器として熱風受熱みぞ型攪拌乾
燥器を使用した湿潤ピッチの乾燥設備のフローを示すも
のである。
FIG. 1 shows the flow of a wet pitch drying equipment using a hot air receiving groove type stirring dryer as the stirring type hot air dryer.

第1図において湿潤ピッチはホッパ−1に投入され、連
続的にベルトコンベア2によって抜取られて熱風受熱み
ぞ型攪拌乾燥器3に供給される。
In FIG. 1, wet pitch is put into a hopper 1, continuously taken out by a belt conveyor 2, and supplied to a hot air receiving groove type stirring dryer 3.

湿潤ピッチは乾燥器3の内部に取付けられた攪拌翼4が
回転することにより跳上げられて移動する。
The wet pitch is lifted up and moved by the rotation of the stirring blade 4 installed inside the dryer 3.

乾燥器3の内部には適当な間隔で仕切板を設けて、熱風
とピンチとの接触を効果的にすることもできる。
Partition plates may be provided inside the dryer 3 at appropriate intervals to ensure effective contact between the hot air and the pinch.

他方熱風炉5においてガス又は液体燃料を燃焼させ、ブ
ロワー6を起動させて、熱風を乾燥器3に導入する。
On the other hand, gas or liquid fuel is combusted in the hot air stove 5, the blower 6 is activated, and hot air is introduced into the dryer 3.

この際熱風の温度は燃料、空気の混入量などを調整する
ことによりピッチの軟化点プラス10℃以下50℃以上
の温度となるように調整される。
At this time, the temperature of the hot air is adjusted by adjusting the amount of fuel, air, etc. to be mixed so that the temperature is 10° C. or more and 50° C. or more above the softening point of the pitch.

乾燥器3の出口端で乾燥されたピッチとピッチ粉塵を含
む排気とに分離され、乾燥ピッチは乾燥器3より抜き出
し貯蔵される。
At the outlet end of the dryer 3, the dried pitch and the exhaust gas containing pitch dust are separated, and the dried pitch is extracted from the dryer 3 and stored.

他方排気熱風はサイクロン7によってピッチ粉塵を分離
し、ダクト10、ブロワー6を経て排出され、分離捕集
されたピッチはベルトコンベア8に抜取られ、乾燥ピッ
チとともに貯蔵される。
On the other hand, the exhaust hot air separates pitch dust by a cyclone 7 and is discharged through a duct 10 and a blower 6, and the separated and collected pitch is taken out to a belt conveyor 8 and stored together with dry pitch.

ピッチ粉塵の発生量が乾燥器3に投入される湿潤ピッチ
の乾燥重量の20%以上では乾燥器3からサイクロン7
までのダクト9などにピッチ粉塵が詰まり、ピッチの乾
燥作業を著しく妨げることとなるので、乾燥器の攪拌翼
4の回転数を調整してピッチ粉塵量を供給されるピッチ
の乾燥重量の20%以下とする必要がある。
If the amount of pitch dust generated is more than 20% of the dry weight of the wet pitch fed into the dryer 3, the dryer 3 will remove the pitch from the cyclone 7.
Since the pitch dust will clog the duct 9 etc. leading to the dryer and will significantly hinder the pitch drying work, the rotation speed of the stirring blade 4 of the dryer will be adjusted to reduce the amount of pitch dust to 20% of the dry weight of the pitch to be supplied. It is necessary to do the following.

以上詳述したごと《本発明の方法によれば湿潤ピンチを
短時間に安定して炭素質成形体の製造のためのバインダ
ーとして使用するに適する水分含有率のピッチ、例えば
0.5重量%以下の水分含有率のピッチに連続的に乾燥
することができ、その工業的価値および環境保全の効果
はすこぶる犬であるといえる。
As detailed above, according to the method of the present invention, the wet pinch can be stably produced in a short period of time, and the pitch has a moisture content suitable for use as a binder for producing carbonaceous molded bodies, for example, 0.5% by weight or less. It can be continuously dried to a pitch with a moisture content of , and its industrial value and environmental protection effects are extremely high.

以下実施例により本発明の方法を詳細に説明するが、本
発明はこれによって制限されるものではない。
The method of the present invention will be explained in detail below with reference to Examples, but the present invention is not limited thereto.

実施例 1 内容量8.0mの熱風受熱みぞ型攪拌乾燥器を用いて第
1図に示すごとき方式により水分含有率3.20重量%
の湿潤ピッチの乾燥を試みた。
Example 1 The water content was reduced to 3.20% by weight by the method shown in Fig. 1 using a hot-air heat-receiving groove type stirring dryer with an internal capacity of 8.0 m.
An attempt was made to dry the wet pitch.

湿潤ピッチは軟化点103℃(軟化点の測定はJIS
K 2425に基ずく。
Wet pitch has a softening point of 103℃ (the softening point is measured according to JIS
Based on K 2425.

)で、0.2%充填率、3. O t / hrの割合
で乾燥器に連続的に供給し、他方該ピッチの軟化点に相
当する103℃の熱風を空塔速度1 m/secで吹き
込み、湿潤ピッチと並流させて15秒間接触させた。
), 0.2% filling rate, 3. The pitch was continuously supplied to the dryer at a rate of O t / hr, while hot air at 103°C, which corresponds to the softening point of the pitch, was blown at a superficial velocity of 1 m/sec and brought into contact with the wet pitch for 15 seconds in parallel flow. I let it happen.

湿潤ピッチは該乾燥器の一軸に1個所2枚の回転翼を交
互に90度位相をずらせて20個所に設けられた回転翼
群で攪拌されて移動されるが、回転数はサイクロンで捕
集されるダスト量か供給される湿潤ピッチの乾燥重量の
10.0%となるごとく調整し、150r,p訓とした
The wet pitch is stirred and moved by a group of 20 rotary blades placed on one axis of the dryer with a phase shift of 90 degrees, but the number of rotations is collected by a cyclone. The amount of dust applied was adjusted to be 10.0% of the dry weight of the wet pitch supplied, and the amount was adjusted to 150 r, p.

この結果乾燥器を出る乾燥ピッチの水分含有率は0.3
1%であり、サイクロン捕集されたピッチ粉塵は粒度5
00μ以下で、その水分含有率は0.41%であった。
As a result, the moisture content of the dry pitch leaving the dryer is 0.3
1%, and the pitch dust collected by the cyclone has a particle size of 5.
The water content was 0.41%.

実施例 2 実施例1と同じ熱風受熱みぞ型攪拌器を用い、水分含有
率3.60重量%の軟化点100℃の湿潤ピッチの乾燥
を行なった。
Example 2 Using the same hot air groove type stirrer as in Example 1, wet pitch with a water content of 3.60% by weight and a softening point of 100° C. was dried.

湿潤ピッチは充填率0.4%,3.Ot/hrの割合で
乾燥器に供給し、同時に95℃の熱風を空塔速度1.5
m/secで並行して吹込み30秒間湿潤ピッチと直接
接触させた。
Wet pitch has a filling rate of 0.4%, 3. At the same time, hot air at 95°C is supplied to the dryer at a rate of Ot/hr at a superficial velocity of 1.5
direct contact with the wet pitch for 30 seconds with parallel blowing at m/sec.

この際攪拌翼の回転数は22Or.p.mとした結果、
サイクロンで捕集されたピッチ粉塵の量は供給ピッチ重
量に対して14.9%であり、乾燥器よりは0.33%
水分含有率のピッチ粉塵が取得された。
At this time, the rotation speed of the stirring blade was 22 Or. p. As a result of m,
The amount of pitch dust collected by the cyclone was 14.9% of the weight of supplied pitch, and 0.33% compared to the dryer.
Pitch dust with moisture content was obtained.

比較例 1 実施例1と同じ熱風受熱みぞ型攪拌乾燥器を用い、ピッ
チの軟化点103℃よりも17℃高い120℃の熱風を
用いた以外実施例1と同様の条件で水分含有率3.20
%湿潤ピッチの乾燥を行なった結果、乾燥ピッチの水分
含有率は0.25重量%であり、サイクロンで捕集され
たピッチ粉塵は供給されたピッチの乾燥重量の9.1%
で水分含有率は0.27重量%であったが、操業開始時
1時間後に熱風の風量低下が目立ったため、操業を中止
して内部を点検した結果、乾燥器の回転翼、内壁、ダク
トなどにピッチの融着が多く観察された。
Comparative Example 1 The same conditions as in Example 1 were used except that the same hot air heat-receiving groove-type stirring dryer as in Example 1 was used, and hot air at 120°C, which was 17°C higher than the softening point of pitch at 103°C, was used under the same conditions as in Example 1. 20
As a result of drying the wet pitch, the moisture content of the dry pitch was 0.25% by weight, and the pitch dust collected by the cyclone was 9.1% of the dry weight of the supplied pitch.
The moisture content was 0.27% by weight, but one hour after the start of operation, there was a noticeable decrease in the amount of hot air, so we stopped the operation and inspected the inside, and found that the dryer's rotor blades, inner walls, ducts, etc. Many pitch fusions were observed.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は熱風受熱みぞ型攪拌乾燥器を使用した本発明方
法による湿潤ピッチの乾燥設備の一実施態様を示すフロ
ーシートである。 3・・・・・・熱風受熱みぞ型攪拌乾燥器、4・・・・
・・回転翼、5・・・・・・熱風炉、6・・・・・・ブ
ロワー、7・・・・・・サイクロン。 261
FIG. 1 is a flow sheet showing an embodiment of wet pitch drying equipment according to the method of the present invention using a hot air receiving groove type stirring dryer. 3...Hot air heat receiving groove type stirring dryer, 4...
...Rotary blade, 5...Hot stove, 6...Blower, 7...Cyclone. 261

Claims (1)

【特許請求の範囲】 1 湿潤ピッチを連続的に乾燥するに当り、湿潤ピッチ
を攪拌、移動させうる手段を有する熱風乾燥器の一端よ
り充填率3%以下となるごとく湿潤ピッチを供給し、攪
拌されつつ移動する湿潤ピッチを該ピッチの軟化点プラ
ス10℃以下50℃以上の熱風と該ピッチの滞留時間が
約5秒〜5分の範囲で接触させて乾燥し、乾燥されたピ
ッチを該乾燥器の他端より導出し、他方ピッチ粉塵を含
む熱風排気は集塵装置に導入し、ピッチ粉塵を分離捕集
し、粉塵量が供給される湿潤ピッチの乾燥重量の20%
以下となるごとく制御する湿潤ピッチの乾燥方法。 2 湿潤ピッチと熱風とを並流接触させて乾燥する特許
請求の範囲第1項記載の方法。 3 湿潤ピッチを攪拌、移動させうる手段を有する熱風
乾燥器が熱風受熱みぞ型攪拌乾燥器である特許請求の範
囲第1項または第2項記載の方法。 4 ピツチの軟化点以下50℃以上の熱風を使用する特
許請求の範囲第1〜3項のいずれかに記載の方法。 5 水分含有率5重量%以下の湿潤ピッチを乾燥処理す
る特許請求の範囲第1〜4項のいずれかに記載の方法。
[Claims] 1. In continuously drying the wet pitch, the wet pitch is supplied from one end of a hot air dryer having a means for stirring and moving the wet pitch so that the filling rate is 3% or less, and the wet pitch is stirred. The moving wet pitch is dried by contacting it with hot air at a temperature of 10°C or higher than the softening point of the pitch and 50°C or higher for a residence time of about 5 seconds to 5 minutes, and the dried pitch is dried by The hot air exhaust containing pitch dust is led out from the other end of the container, and the hot air exhaust containing pitch dust is introduced into a dust collector, where the pitch dust is separated and collected, and the amount of dust is 20% of the dry weight of the wet pitch to be supplied.
A method of drying wet pitch controlled as follows. 2. The method according to claim 1, wherein wet pitch and hot air are brought into contact with each other in parallel to dry the pitch. 3. The method according to claim 1 or 2, wherein the hot air dryer having means for stirring and moving the wet pitch is a hot air receiving groove type stirring dryer. 4. The method according to any one of claims 1 to 3, which uses hot air at a temperature of 50° C. or higher below the softening point of the pitcher. 5. The method according to any one of claims 1 to 4, wherein wet pitch having a water content of 5% by weight or less is dried.
JP4152478A 1978-04-07 1978-04-07 How to dry wet pitch Expired JPS5910718B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4152478A JPS5910718B2 (en) 1978-04-07 1978-04-07 How to dry wet pitch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4152478A JPS5910718B2 (en) 1978-04-07 1978-04-07 How to dry wet pitch

Publications (2)

Publication Number Publication Date
JPS54133513A JPS54133513A (en) 1979-10-17
JPS5910718B2 true JPS5910718B2 (en) 1984-03-10

Family

ID=12610768

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4152478A Expired JPS5910718B2 (en) 1978-04-07 1978-04-07 How to dry wet pitch

Country Status (1)

Country Link
JP (1) JPS5910718B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0430961Y2 (en) * 1988-11-09 1992-07-27
JP2006117794A (en) * 2004-10-21 2006-05-11 Nippon Steel Chem Co Ltd Method for drying carbon material raw material and furnace for drying carbon material raw material
JP4526675B2 (en) * 2000-10-03 2010-08-18 Jfeケミカル株式会社 Dewatering method and dewatering equipment for slurry containing pitch particle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2782193B2 (en) * 1988-02-17 1998-07-30 大阪瓦斯株式会社 How to dry mesocarbon microbeads

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0430961Y2 (en) * 1988-11-09 1992-07-27
JP4526675B2 (en) * 2000-10-03 2010-08-18 Jfeケミカル株式会社 Dewatering method and dewatering equipment for slurry containing pitch particle
JP2006117794A (en) * 2004-10-21 2006-05-11 Nippon Steel Chem Co Ltd Method for drying carbon material raw material and furnace for drying carbon material raw material
JP4730882B2 (en) * 2004-10-21 2011-07-20 新日鐵化学株式会社 Carbon material raw material drying method and carbon material raw material drying furnace

Also Published As

Publication number Publication date
JPS54133513A (en) 1979-10-17

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