JPS6363787A - Apparatus for recovery of tar from coke oven gas - Google Patents
Apparatus for recovery of tar from coke oven gasInfo
- Publication number
- JPS6363787A JPS6363787A JP20690086A JP20690086A JPS6363787A JP S6363787 A JPS6363787 A JP S6363787A JP 20690086 A JP20690086 A JP 20690086A JP 20690086 A JP20690086 A JP 20690086A JP S6363787 A JPS6363787 A JP S6363787A
- Authority
- JP
- Japan
- Prior art keywords
- tar
- coke oven
- ammonia
- ammonium water
- gas
- 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.)
- Pending
Links
- 239000000571 coke Substances 0.000 title claims abstract description 74
- 238000011084 recovery Methods 0.000 title description 26
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 129
- 238000004140 cleaning Methods 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 4
- 229910021529 ammonia Inorganic materials 0.000 abstract description 17
- 238000001816 cooling Methods 0.000 abstract description 10
- 239000003595 mist Substances 0.000 abstract description 6
- 238000005187 foaming Methods 0.000 abstract description 5
- 238000001704 evaporation Methods 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract 3
- 230000002265 prevention Effects 0.000 abstract 1
- 235000012976 tarts Nutrition 0.000 abstract 1
- 239000011269 tar Substances 0.000 description 131
- 238000000926 separation method Methods 0.000 description 13
- 238000003763 carbonization Methods 0.000 description 12
- 239000003245 coal Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 6
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 6
- 238000000605 extraction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000009835 boiling Methods 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 235000019270 ammonium chloride Nutrition 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002747 voluntary effect Effects 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 239000004484 Briquette Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 235000014102 seafood Nutrition 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Landscapes
- Industrial Gases (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はタールを含有する粗製コークス炉ガスからター
ルを効率よく仝聞回収するタール捕集装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tar collection device for efficiently collecting tar from crude coke oven gas containing tar.
［従来の技術］
従来、コークス炉から発生するタール、アンモニアを含
んだコークス炉ガスからタール、安水を回収する設備と
して、代表的な例として第２図のような設備が使用され
ている。コークス炉から発生する粗製コークス炉ガスは
上昇管ベンド２で安水と直接接触し、タールの一部を凝
縮させた後、間接ガス冷却器３でガスは間接冷却され、
タールの一部が凝縮する。[Prior Art] Conventionally, as a typical example of equipment for recovering tar and ammonium water from coke oven gas containing tar and ammonia generated from a coke oven, equipment as shown in FIG. 2 has been used. The crude coke oven gas generated from the coke oven comes into direct contact with ammonium water at the riser pipe bend 2 to condense some of the tar, and then the gas is indirectly cooled in the indirect gas cooler 3.
Some of the tar will condense.
ブロワ−５でガスは昇圧され、ナフタリン捕集塔６でナ
フタリンを除去し、電気集塵器７で熱りのタールが回収
され次工程に送られる。凝縮したタールはデカンタ−９
に入り安水を分離し、スラッジ沈降槽１０でスラッジ分
を除去しタールが回収される。The gas is pressurized by a blower 5, naphthalene is removed by a naphthalene collection tower 6, and hot tar is collected by an electrostatic precipitator 7 and sent to the next process. Condensed tar is decanter-9
The ammonium water enters the tank and the ammonium water is separated, the sludge is removed in a sludge settling tank 10, and tar is recovered.
［発明が解決しようとする問題点］
従来の回収装置は、炭化室毎に設置されている上昇管は
別として、間接ガス冷却器以降は炉団毎に多数の炭化室
より発生する粗製コークス炉ガスを集合して処理するよ
うになっている。コークス炉作業ではフリューの温度、
炉頂空間温度と生成タールの関係、成型炭配合と生成タ
ールの関係、装入■を減少させた時のタールへの影響、
その他の操業条件を変えた時にタールがどの様に変るか
、炭種によるタールへの影響、乾燥炭を装入した時のタ
ールの変化、又調湿炭を装入した時のクールの変化、そ
の他装入炭に種々の添加物を添加した時のタールの変化
等を実験的に知る必要がある。[Problems to be Solved by the Invention] Conventional recovery equipment, apart from the riser pipe installed in each carbonization chamber, uses a crude coke oven that generates raw coke from multiple carbonization chambers in each furnace group after the indirect gas cooler. It is designed to collect and process gas. In coke oven work, the temperature of the flue,
The relationship between the furnace top space temperature and the tar produced, the relationship between the briquette mixture and the tar produced, the effect on tar when reducing the charge,
How tar changes when other operating conditions are changed, the effect of coal type on tar, changes in tar when dry coal is charged, and changes in coolness when humidity control coal is charged, In addition, it is necessary to know experimentally the changes in tar when various additives are added to the charged coal.
実験室で少量の石炭を使用して試験する装置もあるが、
このような炉作業では実炉で試験した時にはどうしても
結果が変って来る。そこで実かで試験する必要性がある
が、炉団全部で試験するには、大量の装入炭を必要とし
、実生産であるため生成するコークス、タール等が規格
から著しく外れたものであってはならず、実施し得る試
験には、おのずと制約がある。即ち、コークス炉の条件
を変更し、コークス炉から製出する物質との関係を調査
する場合にコークス炉全体を対象とした条件の変更は原
料面、計測費用等経済的にも能率面からも得策ではない
。そこで１炭化室又は数個の炭化室から発生するコーク
ス炉ガスを、他の炭化室から発生するガスと分別してタ
ールを分離回収する事が必要になる。しかしコークス炉
数窯から発生する粗製コークス炉ガス中のタールを回収
する場合に、上昇管での安水散水後のガス冷却を間接冷
却器だけでまかなうとすれば、大きな設置面積が必斂と
なり、ガス側の圧力損失も大きく、ガス側管壁にタール
が付着し、ガスの流れを阻害するばかりではなくタール
を全員回収することができない。このような試験目的に
は生成するタールを可及的全ｍ回収しなければ本来の目
的を達し得ない。There are devices that test in the laboratory using small amounts of coal;
In such furnace work, the results will inevitably change when tested in an actual furnace. Therefore, there is a need to test using actual coal, but testing the entire furnace group requires a large amount of charged coal, and since it is actual production, the coke, tar, etc. produced are likely to deviate significantly from the specifications. However, there are naturally limitations on the tests that can be conducted. In other words, when changing the conditions of a coke oven and investigating the relationship with the substances produced from the coke oven, changing the conditions for the entire coke oven is difficult from an economic and efficiency standpoint, such as raw materials and measurement costs. It's not a good idea. Therefore, it is necessary to separate the coke oven gas generated from one carbonization chamber or several carbonization chambers from the gas generated from other carbonization chambers and separate and recover the tar. However, when recovering tar from crude coke oven gas generated from several coke ovens, if the indirect cooler is used to cool the gas after sprinkling ammonium water in the riser, a large installation area is required. The pressure loss on the gas side is also large, and tar adheres to the gas side pipe wall, which not only obstructs the gas flow but also makes it impossible to recover all of the tar. The purpose of such a test cannot be achieved unless all of the generated tar is recovered.
又実炉規模の試験であるので生成したコークス、タール
は分析後は、他のコークス、タールと混合して工業的に
処理されるので単なる試験研究設備ではない。Furthermore, since this is an actual furnace-scale test, the coke and tar generated will be mixed with other coke and tar and processed industrially after analysis, so it is not just a test and research facility.
第２図で示すタール回収設備の規模を小さくして粗製コ
ークス炉ガス中のタールを回収しようとした場合には、
大きな１ｉＱＶ！１面積を要するばかりでなく、多額の
費用を要する。When attempting to recover tar from crude coke oven gas by reducing the scale of the tar recovery equipment shown in Figure 2,
Big 1iQV! Not only does it take up an area, but it also costs a lot of money.
［問題点を解決するための手段］
本発明者等は前記のような問題点を解決し、コークス炉
の諸条件とタールの品質、世の関係を簡単にしかも安い
経費で調査する装置を研究した結果、本発明を完成する
に到った。[Means for Solving the Problems] The present inventors have solved the above-mentioned problems by researching a device that can easily and inexpensively investigate the relationship between the various conditions of a coke oven, the quality of tar, and the world. As a result, we have completed the present invention.
本発明はコークス炉から発生するコークス炉ガスを１２
ｉ環高温安水と直接接触させる＾温々水洗浄装置と該装
置を出たコークス炉ガスを循環低温安水と直接接触させ
る低温安水洗浄装置とを直列に配置してなり、夫々の循
環タンクで凝縮したタール分を分離し、全ωを合流回収
するように配管構成したコークス炉ガスからタールを回
収する装置である。The present invention aims to reduce coke oven gas generated from a coke oven to 12
A hot water cleaning device that brings the coke oven gas out of the device into direct contact with circulating low temperature ammonium water is arranged in series, and each circulation tank This equipment recovers tar from coke oven gas, with piping configured to separate the tar condensed in the coke oven gas and collect the total ω.
第２の発明としては前記低温安水洗浄装置を出たコーク
ス炉ガスがタール抽出機を経てドライメーンに流れるよ
うに配管構成した装置である。A second invention is an apparatus in which piping is configured so that the coke oven gas leaving the low-temperature ammonium water washing apparatus flows through a tar extractor and into a dry main.
当初、炭化室発生コークス炉ガスを安水で冷却してター
ルを捕集する事を実験したが、発生ガスをいきなり低温
安水で冷却するとタールの泡の発生が著しく、タールの
分離が不良で、タール回収歩留が低かった。即ち冷却温
度はある程度ｎい方が安水タンクでのタール分離が良好
となり、安水と共に流出するタールは減少する。Initially, we experimented with collecting tar by cooling the coke oven gas generated in the coking chamber with ammonium water, but if the generated gas was suddenly cooled with low-temperature ammonium water, tar bubbles were generated significantly, resulting in poor tar separation. , the tar recovery yield was low. That is, if the cooling temperature is n to some extent, tar separation in the ammonium water tank will be better, and the amount of tar flowing out together with the ammonium water will be reduced.
しかし、高温安水による捕集だけにすると、コークス炉
ガスの冷却が不充分となって又クールの回収歩留が下る
。従って、高温安水による捕集に続いて低温安水による
捕集を行なうことによりタールの回収歩留を高めること
ができる。ここで高温安水というのは６０〜９０℃好ま
しくは６０〜７０℃の安水をいい、低温安水とは２０〜
５０℃好ましくは４０〜５０℃の安水をいう。上昇管出
口の粗製コークス炉ガスは高温であり、冷却の第１段目
は安水の蒸発潜熱を利用した冷却方式とするが、発泡防
止の面から高温の安水と接触させた方が有利である。冷
却の第２段目は安水の顕然でガスを冷却するため、安水
を冷却した低温安水と充分接触させタールの大部分を安
水中に移行させる。低温安水も安水蒸気を含んだコーク
ス炉ガスと接触して温度が上昇し、循環タンクではター
ルの分離は良好である。タールを分離後、減圧にして一
部の水を蒸発させる蒸発冷却器により温度を下げて再び
低温安水として、コークス炉ガスと接触させることが好
ましい。コークス炉ガスと安水の接触装置としてはコー
クス炉ガス管中へ、高温安水、及び低温安水を何段にも
分けてスプレーする装置が簡易で好ましいが、圧損を伴
わない気液接触ｖ４置であれば、それ自体公知の種々の
装置を使用し得る。However, if only high-temperature ammonium water is used for collection, the coke oven gas will not be cooled sufficiently and the recovery yield of cool will be reduced. Therefore, the recovery yield of tar can be increased by performing collection using low-temperature ammonium water following collection using high-temperature ammonium water. Here, high-temperature ammonium water refers to ammonium water at a temperature of 60 to 90°C, preferably 60 to 70°C, and low-temperature ammonium water refers to ammonium water at a temperature of 60 to 90°C, preferably 60 to 70°C.
It refers to ammonium water at 50°C, preferably 40 to 50°C. The crude coke oven gas at the exit of the riser pipe is at a high temperature, and the first stage of cooling uses the latent heat of vaporization of ammonium water, but it is more advantageous to contact it with high-temperature ammonium water to prevent foaming. It is. In the second stage of cooling, in order to cool the gas using ammonium chloride, the ammonium chloride is sufficiently brought into contact with the cooled low-temperature ammonium water to transfer most of the tar into the ammonium chloride. The temperature of low-temperature ammonium water increases when it comes into contact with coke oven gas containing ammonium water vapor, and tar is separated well in the circulation tank. After separating the tar, it is preferable to lower the temperature using an evaporative cooler that reduces the pressure and evaporates some of the water, and then returns the resulting low-temperature ammonium water to contact with coke oven gas. As a contact device for coke oven gas and ammonium water, a device that sprays high-temperature ammonium water and low-temperature ammonium water in multiple stages into the coke oven gas pipe is simple and preferable, but gas-liquid contact v4 without pressure loss is preferred. Various apparatuses known per se may be used.
上昇管を出た粗製コークス炉ガスに低温安水だけをワン
パスで使用すると分離タンクを可及的大きくしても安水
とタールの分離が不充分の内に安水がタール分を伴って
流出するためタールの回収歩留が６３％と低かった。第
３図は安水を１循環式にしてタールを回収した場合、安
水流ｍを増すと安水中のタールの分離が悪くなりタール
回収率が降下する事を示した図で、安水温度が低いとタ
ールとの分離が悪くなる事を示す。そこで高温安水洗浄
装置、低温安水洗浄装置と２段の洗浄装ごとして発泡を
防止し、更に夫々の装置を閉回路の循環装置とすること
により、結果的に循環タンク即ち静置沈降タンクでの沈
降時間を長くしたことになりタール回収歩留を一挙に９
７％に増加する事ができた。If only low-temperature ammonium water is used in one pass for the crude coke oven gas coming out of the riser, even if the separation tank is made as large as possible, the ammonium water and tar will not be separated sufficiently and the ammonium water will flow out with the tar content. As a result, the tar recovery yield was as low as 63%. Figure 3 shows that when ammonium water is used in a single-circulation system to collect tar, increasing the ammonium water flow m causes separation of tar in the ammonium water to become worse and the tar recovery rate decreases. A low value indicates poor separation from tar. Therefore, by using two stages of washing equipment, a high-temperature ammonium water washing device and a low-temperature ammonium water washing device, to prevent foaming, and making each device a closed-circuit circulation device, the result is a circulation tank, or a static settling tank. By increasing the sedimentation time, the tar recovery yield was increased by 9.
We were able to increase this to 7%.
更に低温安水洗浄装置を出たコークス炉ガス中へのター
ルの漏洩弁を回収するため、タール抽出機をＫＵ 置し
、これを出たガスをドライメーンに送り込む。このター
ル抽出機投首によって、タール回収歩留を更に２％上げ
、９９％にする事ができた。Furthermore, in order to recover the leakage of tar from the low-temperature ammonium water cleaning equipment into the coke oven gas, a tar extractor is installed in the KU, and the gas released from this is sent to the dry main. By turning the head of this tar extraction machine, we were able to further increase the tar recovery yield by 2% to 99%.
本発明の装置は、特定の炭化室又は数個の炭化室の上昇
管から発生するタールを完全に近く回収する場合に使用
して有利な装置である。The apparatus of the present invention is advantageous for use in nearly complete recovery of tar generated from the riser pipes of a particular carbonization chamber or several carbonization chambers.
該当する炭化室の乾留が終了侵全循環安水を分離槽に集
め、加温し、安水中のタール分の分離効率を上げるもの
である。After the carbonization in the corresponding carbonization chamber has been completed, the invasive circulating ammonium water is collected in a separation tank and heated to increase the separation efficiency of the tar content in the ammonium water.
この場合、粗製コークス炉ガスから本発明の装置を使用
しないで、コークス炉ガスを従来の炉団毎のタール回収
装置に流ず必要がある。高温安水洗浄装置を出たコーク
ス炉ガス導管に仕切弁（４１）を設け、該仕切弁より手
前の導管とドライメーンを仕切弁（３９）を介して連絡
配管し、低温安水洗浄装置以降の装置をバイパスさせ既
設のドライメーンにコークス炉ガスを合流させるように
構成することが好ましい。タール抽出機は、それ自体は
公知の装置であるが、本装置においては９７％程度迄既
にタールを回収した侵のコークス炉ガス中のタール霧を
更に完全に回収する事、及び１炭化室、又は数個の炭化
室よりのコークス炉ガスからタールを回収するには、出
来るだけ装置的に簡易な装置が好ましい。タール抽出機
としてはベルーズ式タール抽出機、コツパース式タール
抽出機などの衝撃式タール抽出機、ディスインチグレー
タータール抽出機、サイクロン式タール分ｌ１ｌｌＩ器
などの遠心式タール抽出機、乾式、湿式タールコットレ
ルなどの電気式タール抽出機がある。衝撃式タール抽出
機はガスを多数の細孔を有する篩板を通過させて流速を
高め、篩板の直後に近接して相対している衝撃板に当て
てタールを除去する装置であり、遠心式タール抽出機は
回転体によってガスに大流速を付与し、遠心力によって
器壁に衝突させ分離するものであり、電気式タール抽出
機は電場にガスを導入してタール霧を〈−）に荷電させ
、（＋）の集塵極に集めて分離するものである。後記の
実施例では装置の簡易さと回収率の高い点より衝撃式タ
ール抽出機の一種であるコツパース式タール抽出機を使
用した。In this case, it is necessary not to use the apparatus of the present invention from the crude coke oven gas, but to flow the coke oven gas to the conventional tar recovery apparatus for each oven group. A gate valve (41) is installed in the coke oven gas conduit that exits the high-temperature ammonium water cleaning device, and the conduit before the gate valve and the dry main are connected via the gate valve (39). Preferably, the coke oven gas is configured so as to bypass the device and flow the coke oven gas into the existing dry main. The tar extractor itself is a known device, but in this device, it is possible to more completely recover the tar mist in the coke oven gas from which about 97% of the tar has already been recovered, and a carbonization chamber, Alternatively, in order to recover tar from coke oven gas from several carbonization chambers, it is preferable to use a device that is as simple as possible. Tar extractors include impact type tar extractors such as Behrouz type tar extractor and Kotspurse type tar extractor, centrifugal type tar extractors such as Disinching Grater tar extractor, cyclone type tar fractionator, dry type and wet type tar cotter. There are electric tar extraction machines such as The impact type tar extractor is a device that removes tar by passing gas through a sieve plate with many pores to increase the flow rate, and then applying it to an impact plate located directly behind and facing the sieve plate. A type tar extractor uses a rotating body to impart a high flow rate to the gas, and uses centrifugal force to collide with the vessel wall to separate the gas, while an electric tar extractor introduces gas into an electric field to turn the tar mist into <-). It is charged, collected on a (+) dust collection electrode, and separated. In the examples described later, a cot-pulse tar extractor, which is a type of impact tar extractor, was used because of its simplicity and high recovery rate.
［作用１
粗製コークス炉ガスを低温安水でいきなり洗浄覆ると、
タールが凝縮するが、最初に凝縮してくるタールは高沸
魚介が多く又、タール粒の外面が２激に低温になって粘
度が大きくなる。所がタールの熱伝導度は低いため、内
部は未だ高温であり、タンク内でタール粒同志が合体す
ると、夫々の内部の沸点が異っているため、低沸魚介が
、より高温のタールと接触して、蒸発し、外面の粘度の
高くなった膜があるため発泡するものと考えられる。[Effect 1: If you suddenly wash and cover the crude coke oven gas with low-temperature ammonium water,
Tar condenses, but the tar that condenses first is mostly high-boiling seafood, and the outer surface of the tar particles becomes extremely cold, increasing their viscosity. However, since the thermal conductivity of tar is low, the internal temperature is still high, and when the tar grains coalesce inside the tank, the boiling points inside each are different, so the low-boiling fish and shellfish are mixed with the higher-temperature tar. It is thought that foaming occurs due to the presence of a film with a high viscosity on the outer surface due to evaporation upon contact.
泡を含んだタール粒は見掛は比重が軽くなり安水との分
離が悪くなる。Tar granules containing bubbles appear to have a lower specific gravity, making it difficult to separate them from ammonium water.
高温安水で先づ洗浄すると、安水の蒸発潜熱による冷却
であるので、タール粒も細粒であり、タール粒の外面も
１００℃程度で、低粘度であり、内部で泡を発生しても
容易に外部へ放出され、発泡しないものと考えられる。If the product is washed with high-temperature ammonium water first, the tar granules will be fine because the tar granules will be fine, the outer surface of the tar granules will be about 100°C, and the viscosity will be low, and bubbles will be generated inside. It is thought that the foam is easily released to the outside and does not foam.
ひとたび高温安水によって洗浄されたコークス炉ガスは
、冷温安水で洗浄しても析出してくるり〜ルは、平均沸
点が下っで来て、同じ低温であっても粘度が低く気泡が
発生しても容易に外部へ放出され発泡しないものと考え
られる。粗製コークス炉ガスと接触させる安水は散布量
が多い程、タールの回収率は向上するが、非循環式であ
れば、第３図に示す如く安水中の微粒子のタール及び溶
解性のタールは回収不能となりタール回収保留は低下す
る。高温系安水、低温系安水両方とも循環式とすること
により、系外へのタールの散失を防止し、タール回収歩
留を向上させることができる。Once the coke oven gas has been washed with high-temperature ammonium water, even if it is washed with cold and hot ammonium water, the average boiling point of the coke oven gas will be lowered, and even at the same low temperature, the viscosity will be low and bubbles will form. It is thought that it is easily released to the outside and does not foam. The greater the amount of ammonium water sprayed in contact with the crude coke oven gas, the higher the tar recovery rate. However, in the case of a non-circulating system, as shown in Figure 3, fine particle tar and soluble tar in the ammonium water are reduced. Tar recovery becomes unrecoverable and the tar recovery reserve decreases. By circulating both the high-temperature ammonium water and the low-temperature ammonium water, it is possible to prevent tar from dissipating outside the system and improve the tar recovery yield.
高温安水洗浄装置、低温安水洗浄装置を出たコークス炉
ガス中には、なお３％程度のタール分が残っている。こ
のガス中への漏洩を防ぐためタール抽出機を設置してい
る。Approximately 3% tar still remains in the coke oven gas that has exited the high-temperature ammonium water washing device and the low-temperature ammonium water washing device. A tar extractor is installed to prevent this gas from leaking.
このコークス炉ガス中のタールは非常に細かい粒子のタ
ール霧で、ガスに同伴して浮遊している。The tar in this coke oven gas is a tar mist of very fine particles that floats along with the gas.
これら粒子は表面張力のため球状で、冷却だけで凝縮し
て大粒になることは少ない。このため、ガスを噴出させ
衝撃作用を利用する衝撃式タール抽出機とか、遠心力に
より除去する方式が、タール霧に帯電させて分１１する
方式か、機械的、電気的タール抽出機を併用して残存タ
ールを回収するものである。These particles are spherical due to surface tension, and are unlikely to condense into large particles simply by cooling. For this reason, an impact type tar extraction machine that blows out gas and uses an impact effect, a method that uses centrifugal force to remove tar, a method that charges the tar mist and separates it, or a combination of mechanical and electric tar extraction machines. The remaining tar is recovered.
［実施例］
以下に本発明の大型コークス炉１窯での一実施例につい
て述べる。本発明に４３ける装置は第１図に示す通りで
粗製コークス炉ガスからタールを回収するにあたり装置
運転時の粗製ガスの系統、ガスを冷却する高温安水の循
環系統及び低温安水の循環系統、回収終了後の安水ター
ル後出し系統、装置停止時の粗製ガス、安水バイパス系
統の５つの系統から構成される。[Example] An example of one large coke oven according to the present invention will be described below. The apparatus according to 43 of the present invention is as shown in FIG. 1, and includes a crude gas system during operation of the apparatus to recover tar from crude coke oven gas, a high-temperature ammonium water circulation system for cooling the gas, and a low-temperature ammonium water circulation system. It consists of five systems: the ammonium water tar post-discharge system after recovery, the crude gas when the equipment is stopped, and the ammonium water bypass system.
先ず装置運転時の粗製ガス系統は上昇管２１を通り高温
安水ノズル２２で冷却され仕切弁４１を通り、次に低温
安水ノズル２４で冷却され、タール抽出機２５で少量の
タール、安水ミストは除去され流口計２６を通りエジェ
クター２７で吸収され仕切弁４０を通りバイパス管２３
を経て既設ドライメーン２８に合流する。First, the crude gas system during equipment operation passes through a riser pipe 21, is cooled by a high temperature ammonium water nozzle 22, passes through a gate valve 41, is then cooled by a low temperature ammonium water nozzle 24, and is extracted with a small amount of tar and ammonium water by a tar extractor 25. The mist is removed, passes through the flow meter 26, is absorbed by the ejector 27, passes through the gate valve 40, and passes through the bypass pipe 23.
It joins the existing dry main 28.
高温安水の循環系統は気液分だ１器２９を通り分離タン
ク３０でタールは分離され高温安水はポンプ引で高温安
水スプレー２２及びタール抽出機２５に送られ回収を停
止するまで循環を行う。The high-temperature ammonium water circulation system passes through a gas-liquid separator 29, and the tar is separated in a separation tank 30.The high-temperature ammonium water is pumped to a high-temperature ammonium water spray 22 and a tar extractor 25, where it is circulated until collection is stopped. I do.
低温安水の循１１系統は気液分ｉ！ｌｉＩ器３８を通り
分離タンク３７でタールは分離され安水は蒸発冷却器３
３で所定の温度に冷却されポンプ３５で低温安水ノズル
２４に送られ回収を停止するまで循１１を行う。The 11 systems for circulating low-temperature ammonium water are gas-liquid components i! The tar passes through the liI reactor 38 and is separated in the separation tank 37, and the ammonium water passes through the evaporative cooler 3.
3, the water is cooled to a predetermined temperature and sent to the low-temperature ammonium water nozzle 24 by the pump 35, where it is circulated 11 until collection is stopped.
回収終了後の安水、タール後出し系統は分離タンク３７
蒸発冷却器３３に入っている安水及びタールを分離タン
ク３０１．：ｌｉき落し加熱静ｎし安水とタールを分１
１１ｔＴる。タールは抜き取り横開し分析に用いる。The ammonium water and tar discharge system after collection is completed is a separation tank 37.
Ammonium water and tar contained in the evaporative cooler 33 are separated into a tank 301. : Lift off the liquid, heat it up, and add ammonium water and tar to 1 part.
11tTru. The tar is sampled, opened horizontally, and used for analysis.
装置停止時の粗製ガス、安水バイパス系統はコークス炉
から発生する粗製ガスは上昇管２１を通り、高温安水ノ
ズル２２と接触し冷却され仕切弁３９バイパス管２３を
経て既設のドライメーンに合流する。In the crude gas and ammonium water bypass system when the equipment is stopped, the crude gas generated from the coke oven passes through the riser pipe 21, contacts the high temperature ammonium water nozzle 22, is cooled, and flows through the gate valve 39 bypass pipe 23 to the existing dry main. do.
この場合仕切弁４１．４０は閉じられる。安水は低圧安
水３２から供給されｇ−安水ノズル２２でスプレーされ
気液分ｌ１ｌｌｉｉ５２９を経て既設ドライメーンに合
流する。In this case the gate valves 41,40 are closed. Ammonium water is supplied from the low-pressure ammonium water 32, sprayed by the g-ammonium water nozzle 22, passes through the gas-liquid portion 11llii 529, and joins the existing dry main.
このようにしてコークス炉から発生する粗製コークス炉
ガス中のタールを回収する実験を実施した条件を表に承
り。The conditions under which an experiment was conducted to recover tar from crude coke oven gas generated from a coke oven in this way are listed below.
［第１表］
［発明の効果］
従来のコークス炉のタール回収設備では１炭化室又は数
炭化室だけのタールを分離回収する事は不可能であると
共に大きい設置面積を必要とし、ガスの圧損も大ぎく、
タールを全組回収できなかった。又大帛の低温安水で非
循環でタールを回収しようとするとタールと安水の分離
が悪くなり、６０％程度のタール回収歩留しかｑられな
い。本発明の高温安水と低温安水の２段冷却装置により
タールの発泡を防止し、各装置を循環式にすることによ
り回収歩留を９７％程度に向上さＶる事ができ、更にタ
ール抽出機を並用することで９８〜９９％のタール回収
歩留とすることができた。[Table 1] [Effects of the invention] With conventional tar recovery equipment for coke ovens, it is impossible to separate and recover tar from only one or several carbonization chambers, and a large installation area is required, resulting in a large gas pressure drop. Also big,
Not all sets of tar could be collected. Furthermore, when attempting to recover tar without circulation using large sheets of low-temperature ammonium water, the separation of tar and ammonium water becomes poor, resulting in a tar recovery yield of only about 60%. The two-stage cooling device for high-temperature ammonium water and low-temperature ammonium water of the present invention prevents foaming of tar, and by making each device a circulation type, it is possible to improve the recovery yield to about 97%. By using an extractor in parallel, a tar recovery yield of 98 to 99% could be achieved.
（第４図参照）本装置の使用により、コークス炉から発
生するタールを全８回収できるので、コークス炉諸条件
とタールの品質、量の関係を安い経費で効率よく調べる
事ができる。(See Figure 4) By using this device, a total of 8 tars generated from a coke oven can be recovered, so the relationship between coke oven conditions and the quality and quantity of tar can be investigated efficiently at low cost.
第１図は本発明のタール回収設備系統説明図、第２図は
従来のタール回収設備系統説明図、第３図は低温安水非
循環式での安水流出とタール回収率の関係、第４図は本
発明装置でのタール回収率である。
［記号の説明〕
１、コークス炉 ２７．エジェクター２、上昇管
ベンド ２８．ドライメーン３、間接ガス冷却器
２９．気液分離器４、直接ガス冷却器 ３０１分離
タンク５、ブロワ−３１高温安水ポンプ
６、ナフタリン捕集塔 ３２．低圧安水７、電機集塵器
３３．蒸発冷却器８、安水ポンプ ３４
コンデンサー９、デカンタ−３５低温安水ポンプ
１０、スラッジ沈降槽 ３６．安水・タール抜出管２
１ 上昇管 ３７４分離タンク２２゜高温
安水ノズル ３８．気液分ｌｌ１ｌ器２３ ガスバ
イパス管 ３９ 仕切弁２４、低温安水ノズル
４０．仕切弁２５、タール抽出機 ４１．仕切弁２
６、流量計
特許出願人 新日鐵化学株式会社
代 理 人 弁理士 佐 野 英 −第
１図
第２図
第３図
９未充ｔ（”ム）
第４図
Ｄ 数
手菊暑甫正口（自発）
蒙６１年１１月７日
特許庁長官 黒 １）明！ＪＡＦ２
】０羽生の表示 昭和６１１噂羽乍願第２０６９００
号２、発明の名称 コークス炉ガスからタールを回収
する装置３、補正をする者
事件との関係 特許εｍ
住所 〒１０４ 東京都中央区銀座五丁目１３番１６
号名称 （０６６４） 新註Ｓン圀林麩（会社イ侭者
安永和民
４、 （切り、
住所 〒１０４ 東京都中央区１ｆｆｉＴ目１３番１
６号５、補正命令の日付 自発補正
６、補正の対象
明細書の発明の詳細な説明の欄及び図面の簡単な説明の
欄７、補正の内容
ｉｌｌ明細書第１２頁第７行目に回収保留とあるのを回
収歩留と補正する。Figure 1 is an explanatory diagram of the tar recovery equipment system of the present invention, Figure 2 is an explanatory diagram of the conventional tar recovery equipment system, Figure 3 is the relationship between ammonium water outflow and tar recovery rate in a low-temperature ammonium water non-circulation system, and Figure 4 shows the tar recovery rate using the apparatus of the present invention. [Explanation of symbols] 1. Coke oven 27. Ejector 2, riser pipe bend 28. Dry main 3, indirect gas cooler
29. Gas-liquid separator 4, direct gas cooler 301 separation tank 5, blower 31 high temperature ammonium water pump 6, naphthalene collection tower 32. Low-pressure ammonium water 7, electric dust collector 33. Evaporative cooler 8, cheap water pump 34
Condenser 9, decanter 35, low temperature ammonium water pump 10, sludge settling tank 36. Anonymous water/tar extraction pipe 2
1 Rising pipe 374 Separation tank 22° High temperature ammonium water nozzle 38. Gas-liquid divider 23 Gas bypass pipe 39 Gate valve 24, low-temperature ammonium water nozzle
40. Gate valve 25, tar extraction machine 41. Gate valve 2
6. Flowmeter patent applicant: Nippon Steel Chemical Co., Ltd. Agent: Hide Sano, patent attorney - Figure 1 Figure 2 Figure 3 Figure 9 Unfilled Figure 4 D Number of hands Kikushoho Masaguchi (Voluntary) November 7, 1961 Commissioner of the Japan Patent Office Black 1) Ming! JAF2 ] 0 Hanyu Display 1986 Rumor Hanyu Request No. 206900
No. 2, Name of the invention Apparatus for recovering tar from coke oven gas 3, Relationship with the amended case Patent εm Address 13-16, 5-chome, Ginza, Chuo-ku, Tokyo 104
No. name (0664) New annotation: Kazutami Yasunaga 4, Address: 13-1, 1ffiT, Chuo-ku, Tokyo 104
No. 6 No. 5, Date of amendment order Voluntary amendment 6, Detailed explanation of the invention column and Brief explanation of drawings column 7 of the specification subject to amendment, Contents of amendment Collected on page 12, line 7 of the ill specification Correct the statement "on hold" to "collection yield".
Claims (4)
温安水と直接接触させる高温安水洗浄装置と該装置を出
たコークス炉ガスを循環低温安水と直接接触させる低温
安水洗浄装置とを直列に配置してなり、夫々の循環タン
クで凝縮したタール分を分離し、全量を合流回収するよ
うに配管構成したコークス炉ガスからタールを回収する
装置。(1) A high-temperature ammonium water cleaning device that brings coke oven gas generated from a coke oven into direct contact with circulating high-temperature ammonium water, and a low-temperature ammonium water cleaning device that brings coke oven gas exiting the device into direct contact with circulating low-temperature ammonium water. A device for recovering tar from coke oven gas that is arranged in series and has piping configured to separate the condensed tar in each circulation tank and collect the entire amount together.
ス炉ガス中にスプレーする装置である特許請求の範囲第
１項記載の粗製コークス炉ガスからタールを回収する装
置。(2) The device for recovering tar from crude coke oven gas according to claim 1, wherein the high temperature ammonium water cleaning device is a device that sprays ammonium water at 60 to 90° C. into coke oven gas.
ス炉ガス中にスプレーする装置であり、循環ラインのタ
ンクの後に蒸発冷却器を備えた装置である特許請求の範
囲第１項、第２項記載の粗製コークス炉ガスからタール
を回収する装置。(3) Claim 1, wherein the low-temperature ammonium water washing device is a device that sprays ammonium water at 20 to 50°C into coke oven gas, and is equipped with an evaporative cooler after the tank in the circulation line. , an apparatus for recovering tar from crude coke oven gas according to item 2.
して循環させた高温安水と直接接触させる高温安水洗浄
装置と該装置を出たコークス炉ガスを通して循環させた
低温安水と直接接触させる低温安水洗浄装置とを直列に
配置し、該低温安水洗浄装置を出たコークス炉ガスがタ
ール抽出機を経てドライメーンに流れるように配管して
なり、夫々の循環タンク及びタール抽出機で凝縮したタ
ール分を分離し、全量を合流回収するように配管構成し
た粗製コークス炉ガスからタールを回収する装置。(4) A high-temperature ammonium water cleaning device in which the high-temperature ammonium water is brought into direct contact with the high-temperature ammonium water that is circulated through the crude coke oven gas generated from the coke oven; The coke oven gas from the low-temperature ammonium water washing device is installed in series with a water washing device, and piping is arranged so that the coke oven gas that comes out of the low-temperature ammonium water washing device flows through the tar extractor to the dry main, and is condensed in each circulation tank and tar extractor. A device that recovers tar from crude coke oven gas, with piping configured to separate the tar and collect the entire amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20690086A JPS6363787A (en) | 1986-09-04 | 1986-09-04 | Apparatus for recovery of tar from coke oven gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20690086A JPS6363787A (en) | 1986-09-04 | 1986-09-04 | Apparatus for recovery of tar from coke oven gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6363787A true JPS6363787A (en) | 1988-03-22 |
Family
ID=16530922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20690086A Pending JPS6363787A (en) | 1986-09-04 | 1986-09-04 | Apparatus for recovery of tar from coke oven gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6363787A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100505440B1 (en) * | 2000-06-23 | 2005-08-05 | 주식회사 포스코 | Apparatus for retrieving coal tar pitch of amonia distillation tower |
| KR100906563B1 (en) | 2002-12-24 | 2009-07-07 | 재단법인 포항산업과학연구원 | Method for absorption of hydrogen sulfide from coke oven gas |
| KR100955580B1 (en) * | 2002-12-24 | 2010-04-30 | 재단법인 포항산업과학연구원 | Reduction method of tar mist in coke oven gas by the control the spray time of hot flushing liquor |
| KR101010752B1 (en) * | 2003-09-26 | 2011-01-25 | 재단법인 포항산업과학연구원 | Reduction method of tar mist in Coke Oven Gas |
| JP2019178232A (en) * | 2018-03-30 | 2019-10-17 | 三菱ケミカル株式会社 | Method for cleaning suction main piping |
| CN114534313A (en) * | 2022-03-03 | 2022-05-27 | 广东韶钢松山股份有限公司 | Method for eliminating oil slick on top of tar and ammonia water separation tank |
-
1986
- 1986-09-04 JP JP20690086A patent/JPS6363787A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100505440B1 (en) * | 2000-06-23 | 2005-08-05 | 주식회사 포스코 | Apparatus for retrieving coal tar pitch of amonia distillation tower |
| KR100906563B1 (en) | 2002-12-24 | 2009-07-07 | 재단법인 포항산업과학연구원 | Method for absorption of hydrogen sulfide from coke oven gas |
| KR100955580B1 (en) * | 2002-12-24 | 2010-04-30 | 재단법인 포항산업과학연구원 | Reduction method of tar mist in coke oven gas by the control the spray time of hot flushing liquor |
| KR101010752B1 (en) * | 2003-09-26 | 2011-01-25 | 재단법인 포항산업과학연구원 | Reduction method of tar mist in Coke Oven Gas |
| JP2019178232A (en) * | 2018-03-30 | 2019-10-17 | 三菱ケミカル株式会社 | Method for cleaning suction main piping |
| CN114534313A (en) * | 2022-03-03 | 2022-05-27 | 广东韶钢松山股份有限公司 | Method for eliminating oil slick on top of tar and ammonia water separation tank |
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