JPS6030641A - Cleaning of roasting gas exhausted from roaster - Google Patents
Cleaning of roasting gas exhausted from roasterInfo
- Publication number
- JPS6030641A JPS6030641A JP14001083A JP14001083A JPS6030641A JP S6030641 A JPS6030641 A JP S6030641A JP 14001083 A JP14001083 A JP 14001083A JP 14001083 A JP14001083 A JP 14001083A JP S6030641 A JPS6030641 A JP S6030641A
- Authority
- JP
- Japan
- Prior art keywords
- roasting
- exhaust gas
- temperature
- oxidation catalyst
- exhaust
- 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.)
- Granted
Links
Landscapes
- Tea And Coffee (AREA)
- Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、主にコーヒ生豆の焙煎に用いられる焙煎機に
おいて、焙煎排気を浄化する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for purifying roasting exhaust gas in a roaster mainly used for roasting green coffee beans.
従来、この柿の焙煎機においては、焙煎室の焙煎排気と
冷却槽の冷却排気はそれぞれ酸化触媒を通過して脱臭さ
れる。ところが、アイスコーヒ用の生豆を焙煎する場合
は、ホットコーヒ用の生豆を焙煎する場合に比し、焙煎
温度が高く、酸化触媒を通過する焙煎排気の温度が５０
０乃至６００°Ｃと高くなる。そのために焙煎排気用の
酸化触媒の寿命が短く、また、酸化の際に生成する窒素
酸化物ＮＯｘの量が多い。Conventionally, in this persimmon roasting machine, the roasting exhaust gas from the roasting chamber and the cooling exhaust gas from the cooling tank are deodorized by passing through an oxidation catalyst. However, when roasting green beans for iced coffee, the roasting temperature is higher than when roasting green beans for hot coffee, and the temperature of the roasting exhaust gas passing through the oxidation catalyst is 50°C.
The temperature increases from 0 to 600°C. Therefore, the life of the oxidation catalyst for roasting exhaust gas is short, and the amount of nitrogen oxides NOx generated during oxidation is large.
本発明の目的は、上記のような従来の欠点をなくシ、酸
化触媒の寿命が長く、また、窒素酸化物の生成量が少な
い焙煎機における焙煎排気の浄イし法を提供することで
ある。An object of the present invention is to provide a method for purifying roasting exhaust gas in a roasting machine that eliminates the above-mentioned conventional drawbacks, has a long oxidation catalyst life, and produces a small amount of nitrogen oxides. It is.
本発明者は、上記の目的Ｐ達成するため、先ず。In order to achieve the above-mentioned objective P, the present inventors firstly.
酸化触媒の温度と９素酸化物ＮＯｘ の生成量の関係を
実験によ−り調査したところ、９累酸化物の生成量は酸
化触媒の出口温度によって大きく影響され、第１図の線
図に示すように、窒素酸化物ＮＯｘの生成量は酸化触媒
の出口温度にほぼ正比例することが判明した。この結果
のみからすると、酸化触媒の出口温度は低い方が良く、
その温度が３０Ｑ℃以下になると、窒素酸化物が生成し
〃くなる。When we investigated the relationship between the temperature of the oxidation catalyst and the amount of NOx produced, we found that the amount of produced 9-fold oxide was greatly affected by the outlet temperature of the oxidation catalyst, and the line diagram in Figure 1 As shown, it was found that the amount of nitrogen oxide NOx produced was approximately directly proportional to the outlet temperature of the oxidation catalyst. Based on this result alone, the lower the outlet temperature of the oxidation catalyst, the better.
When the temperature falls below 30Q°C, nitrogen oxides are generated.
しかし、酸化触媒の温度が低くなると、一方において、
焙煎排気中の法化水素ＨＣ州が酸化触媒に反応しなくな
って、臭気濃度が増大し、脱臭効果がなくなる。従って
、これらのことからして、上記の実験に用いた焙煎機に
おいては、酸化触媒を通過する焙煎排気の温度を３００
″Ｃ強位にすれば、窒素酸化物の生成■が低減し、かつ
脱臭効果があることが判明した。次に、窒素酸化物の生
成、量を低減し、かつ、酸化触媒の寿命を延ばすために
焙煎排気の温度を下げる方法について考察したと〇ろ、
焙煎機においては、焙煎した豆を冷却する冷却槽の冷却
排気は焙煎排気に比して著しく低温であることから、冷
却排気を焙煎排気に合流ないし混合させることを考え付
いた。この１９にすると、脱臭装置は７台で済み５経済
的である。たが、冷却排気は、焙豆の冷却時のみに発生
し、常時発生しないので、冷却排気がないときには新鮮
空気を焙煎排気に合流ないし混合させることとした。However, when the temperature of the oxidation catalyst decreases, on the other hand,
The legalized hydrogen HC in the roasting exhaust no longer reacts with the oxidation catalyst, increasing the odor concentration and eliminating the deodorizing effect. Therefore, based on these facts, in the roasting machine used in the above experiment, the temperature of the roasting exhaust gas passing through the oxidation catalyst was set to 300°C.
It has been found that by increasing the carbon content, the production of nitrogen oxides is reduced and there is a deodorizing effect.Next, it is possible to reduce the production and amount of nitrogen oxides and extend the life of the oxidation catalyst. I thought about how to lower the temperature of the roasting exhaust for this purpose.
In roasting machines, the cooling exhaust from the cooling tank that cools roasted beans has a significantly lower temperature than the roasting exhaust, so we came up with the idea of merging or mixing the cooling exhaust with the roasting exhaust. With this number of 19, only 7 deodorizing devices are required, which is 5 economical. However, since the cooling exhaust gas is generated only when the roasted beans are cooled and is not generated all the time, it was decided that fresh air would join or mix with the roasting exhaust air when there was no cooling exhaust air.
即ち、本発明は、焙煎室の焙煎排気を酸化触媒に通して
脱臭し、冷却槽の冷却排気を酸化触媒に通して脱臭する
焙煎機において、酸化触媒を通過する前の焙煎排気に、
酸化触媒な通過する前の冷却排気を合流して、冷却排気
のないときには新鮮空気を合流して、焙煎排気の温度を
下げ、酸化触媒を通過する合流排気の温度を窒素酸化物
の生成量が低減しかつ脱臭効果のある温度にすることを
特徴とする焙煎排気の浄化法である。That is, the present invention provides a roasting machine that deodorizes roasting exhaust gas from a roasting chamber by passing it through an oxidation catalyst, and deodorizes the roasting exhaust gas from a cooling tank by passing it through an oxidation catalyst. To,
The cooled exhaust gas before passing through the oxidation catalyst is combined, and when there is no cooled exhaust air, fresh air is combined to lower the temperature of the roasting exhaust gas, and the temperature of the combined exhaust gas passing through the oxidation catalyst can be adjusted to increase the amount of nitrogen oxide produced This is a method for purifying roasting exhaust gas, which is characterized by reducing the temperature of the roasting exhaust gas and reducing the temperature at which it has a deodorizing effect.
この浄化法においては、焙煎排気は冷却排気又は新鮮空
気によって温度を下げられて酸化触媒を通過するので、
窒素酸化物の生成量が少なく、寸た、酸化触媒の寿命が
長い。In this purification method, the temperature of the roasting exhaust gas is lowered by cooled exhaust air or fresh air and then passes through an oxidation catalyst.
The amount of nitrogen oxides produced is small, and the life of the oxidation catalyst is long.
次に、本発明の実施例について説明する。Next, examples of the present invention will be described.
本例の焙煎機は、第２図に略示するＩうに、焙煎室（１
）と冷却槽（４）コ近接して設け、焙煎室（１）企送風
機（５）を介在したダクト（６）で集塵器（７）の入口
に接続し、集塵器（７）の出口をダクト（８）で濾過器
（９）の入口に接続し、１慮過器（９）の出口を送風機
（１１を介在したダクト０υで熱交換器（Ｑの受熱通路
の入口に接続し、熱交換器＠の受熱通路の出口をダク）
（＋３で加熱炉０４）の入口に接続し、加熱炉（１４
１の出口をダクト０９で脱臭炉（ＩＱの入口に接続し、
白金系酸化触媒層αηを内蔵した脱臭炉ＱＱの出口をダ
クトθ枠で上記の熱交換器（２）の放熱通路の入口に接
続し、熱交換器（２）の放熱通路の出口をダク） Ｑｌ
を介して大気に開放して、焙煎室（１）から大気に去る
焙煎排気の浄化路を形成している。また、冷却Ｉ’！
（４１は送風ｉに）を介在したダク） ａｍ）で集塵器
翰の入口に接続し、集塵器に）の出口をダクト（２）で
濾過器（９）の入口に接続して、冷却槽（４）から大気
に去る冷却排気の浄化路を焙煎排気の浄化路の一部を併
用して形成している。更に、濾過器（９）の出口にはダ
ンパ（ハ）を介在したダクト（ハ）を接続し、ダクト（
ハ）の端を大気に開放して、空気取入路を形成している
。The roasting machine of this example has a roasting chamber (1
) and the cooling tank (4) are installed in close proximity to each other, and the roasting chamber (1) is connected to the inlet of the dust collector (7) through a duct (6) with a ventilation fan (5) interposed therebetween. The outlet of the filter (9) is connected to the inlet of the filter (9) through the duct (8), and the outlet of the filter (9) is connected to the inlet of the heat receiving passage of the heat exchanger (Q) through the duct 0υ with the blower (11) interposed. and duct the outlet of the heat receiving passage of the heat exchanger @)
(+3 connects to the inlet of heating furnace 04),
Connect the outlet of 1 to the inlet of the deodorizing furnace (IQ) with duct 09,
Connect the outlet of the deodorizing furnace QQ containing the platinum-based oxidation catalyst layer αη to the inlet of the heat radiation passage of the heat exchanger (2) with a duct θ frame, and connect the outlet of the heat radiation passage of the heat exchanger (2) with the duct) Ql
is opened to the atmosphere through the roasting chamber (1), thereby forming a purification path for roasting exhaust gas leaving the roasting chamber (1) to the atmosphere. Also, cooling I'!
Connect the outlet of the dust collector (to the dust collector) to the inlet of the filter (9) with the duct (2), A purification path for the cooling exhaust gas leaving the cooling tank (4) to the atmosphere is formed using a part of the purification path for the roasting exhaust gas. Furthermore, a duct (C) with a damper (C) interposed is connected to the outlet of the filter (9), and the duct (C) is connected to the outlet of the filter (9).
The end of c) is opened to the atmosphere to form an air intake passage.
本例の焙煎機においてアイスコーヒ用の生豆を焙煎する
場合は、焙煎室（１）内の回転能（２）を回転すると共
に回転能（２）の下側のバーナ（３）に点火し、焙煎排
気の浄化路の送風機（５） 、 Ｑ（Ｉをそれぞれ駆動
し、加熱炉Ｑ４Ｊのバーナに点火し、空気取入路のダン
パ（ハ）を開放し、回転ｍ （２）に生豆を投入して、
生豆を１Ｓ分位加熱して焙煎する。回転ｆｉｌ（２）内
の生豆が焙煎されたところで、冷却排気の浄化路の送風
機（１）Ｐ駆動すると共に空気取入路のダンパ（ハ）を
閉鎖する一方、回転能（２）内の焙豆を冷却槽（４）に
取出し、回転能（２）に次の生豆を投入して前回と同様
に焙煎する一方、冷却槽（４）内の焙煎豆をＳ分位空冷
する。When roasting green coffee beans for iced coffee in the roasting machine of this example, the rotation capacity (2) in the roasting chamber (1) is rotated, and the burner (3) below the rotation capacity (2) is rotated. ignite, drive the blowers (5) and Q(I) in the roasting exhaust purification path, ignite the burner of heating furnace Q4J, open the damper (c) in the air intake path, and rotate m (2). ), put the raw beans into
Roast the raw beans by heating them for about 1S. When the green beans in the rotary fil (2) are roasted, the blower (1) P in the cooling exhaust purification path is driven and the damper (c) in the air intake path is closed. Take out the roasted beans into the cooling tank (4), put the next green beans into the rotation capacity (2), and roast them in the same way as before, while the roasted beans in the cooling tank (4) are air-cooled by S. do.
冷却槽（４）内の焙豆が冷却されたところで、冷却排気
の浄化路の送風機−の駆動を停止すると共に空気取入路
のダンパ（ハ）を開放し、冷却槽（４）内の焙豆を取出
す。When the roasted beans in the cooling tank (4) have been cooled, the blower in the cooling exhaust purification path is stopped, and the damper (c) in the air intake path is opened, so that the roasted beans in the cooling tank (4) are cooled. Take out the beans.
すると、焙煎室（１）内に生じた粉塵を含み臭気を放つ
焙煎排気は、焙煎排気の浄化路の送風機（５）によって
集塵器（７）に送入されて脱塵され、また、濾過器（９
ンに送入されて濾過され、次に、送風ＰＪＩａｔｔによ
って熱交換器（６）の受熱通路を通過して加熱炉α４に
送入されて加熱され、また、脱臭炉αＱに送入されて白
金系酸化触媒層αηを通過して酸化により脱臭され、次
に、熱交換器（ψの放熱通路を通過して大気に放出され
る。ところが、冷却排気の浄化路の送風機体）が駆動し
て夜気取入路のダンパ（至）が閉鎖しているとき、即ち
賠豆を冷却しているときには、冷却槽（４）内に生じた
粉塵を含み臭気を放つ冷却排気が冷却排気の浄化路の送
風機に）によって集塵器（イ）に送入されて脱塵され、
この脱塵冷却排気が濾過器（９）に送入されて焙煎排気
に合流して、焙煎排気の温度を下げ、焙煎排気より低温
の合流排気が濾過器（９）、送風機ＱＯ，熱交換器０の
の受熱通路、加熱炉α→、脱臭炉（Ｉｆｆと熱交換器（
ハ）の放熱通路を経て大気に放出され、脱臭炉の白金系
酸化触媒層Ｏηを通過する合流排気の温度が窒素酸化物
の生成量が少なくてかつ脱臭効果のある３００″Ｃ強位
の温度になる。また、冷却排気の浄化路の送風機（イ）
の駆動が停止して空気取入路のダンパ（財）が開放して
いるとき、即ち焙豆を冷却していないときには、焙煎排
気の浄化路の送風ｉ （１１によって空気取入路に）を
経て新鮮空気が濾過器（９）の出口に取入れられこの新
鮮空気が焙煎排気に合流して、焙煎排気の温度を下げ、
焙豆を冷却しているときと同様に、脱臭炉の白金系酸化
触ＫＭａηを通過する合流排気の温度が３００°Ｃ強位
の温度になる。Then, the roasting exhaust gas containing dust and emitting an odor generated in the roasting chamber (1) is sent to the dust collector (7) by the blower (5) in the purification path of the roasting exhaust gas, where it is removed. In addition, a filter (9
Next, it is sent to the heating furnace α4 through the heat receiving passage of the heat exchanger (6) by the air blower PJIatt to be heated, and is also sent to the deodorizing furnace αQ to remove platinum. It passes through the system oxidation catalyst layer αη and is deodorized by oxidation, and then passes through the heat radiation passage of ψ and is released into the atmosphere. However, the blower body of the cooling exhaust purification passage is driven When the damper (to) of the night air intake path is closed, that is, when the beans are being cooled, the cooling exhaust gas that contains dust and emits an odor generated in the cooling tank (4) is removed from the cooling exhaust purification path. The dust is sent to the dust collector (a) by the air blower (blower), and the dust is removed.
This dedusting cooling exhaust gas is sent to the filter (9) and joins with the roasting exhaust gas to lower the temperature of the roasting exhaust gas, and the combined exhaust gas, which is lower in temperature than the roasting exhaust gas, passes through the filter (9), the blower QO, Heat receiving passage of heat exchanger 0, heating furnace α →, deodorizing furnace (Iff and heat exchanger (
The temperature of the combined exhaust gas that is released into the atmosphere through the heat dissipation passage (c) and passes through the platinum-based oxidation catalyst layer Oη of the deodorizing furnace is a temperature of over 300"C, which produces a small amount of nitrogen oxides and has a deodorizing effect. In addition, the blower (a) in the cooling exhaust purification path
When the drive of the roasting exhaust gas is stopped and the damper in the air intake path is open, that is, when the roasted beans are not being cooled, the air blower i (to the air intake path by 11) in the roasting exhaust purification path is The fresh air is taken in at the outlet of the filter (9), and this fresh air joins the roasting exhaust to lower the temperature of the roasting exhaust.
Similar to when roasted beans are being cooled, the temperature of the combined exhaust gas passing through the platinum-based oxidizing catalyst KMaη of the deodorizing furnace reaches a temperature of about 300°C.
第１図は焙煎機における窒素酸化物と酸化触媒出口温度
との関係を示す線図であり、第一図は本発明の実施例の
焙煎排気の浄化法を実施する焙煎機の概略図である。
１：焙煎室 ４：冷却槽
１７：白金系酸化触媒層
；１′１図
２００ ３００ ４００ ５００ ６００触媒出ロ二里
度（Ｃ）
汁２図FIG. 1 is a diagram showing the relationship between nitrogen oxides and oxidation catalyst outlet temperature in a roasting machine, and FIG. It is a diagram. 1: Roasting chamber 4: Cooling tank 17: Platinum-based oxidation catalyst layer;
Claims (1)
冷却排気を酸化触媒に通して脱臭する焙煎機において、
酸化触媒を通過する前の焙煎排気に、酸化触媒を通過す
る前の冷却排気を合流して冷却排気のないときには新鮮
空気を合流して、焙煎排気の温度を下け、酸化触媒を通
過する合流排気゛の温度を窒素酸化物の生成量が低減し
かつ脱臭効果のある温度にすることを特徴とする焙煎排
気の浄化法。In a roasting machine that deodorizes roasting exhaust gas from a roasting chamber by passing it through an oxidation catalyst, and deodorizes the cooling exhaust gas from a cooling tank by passing it through an oxidation catalyst,
The roasting exhaust before passing through the oxidation catalyst is combined with the cooled exhaust before passing through the oxidation catalyst, and when there is no cooled exhaust, fresh air is combined to lower the temperature of the roasting exhaust before passing through the oxidation catalyst. A method for purifying roasting exhaust gas characterized by controlling the temperature of the combined exhaust gas to a temperature that reduces the amount of nitrogen oxides produced and has a deodorizing effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14001083A JPS6030641A (en) | 1983-07-29 | 1983-07-29 | Cleaning of roasting gas exhausted from roaster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14001083A JPS6030641A (en) | 1983-07-29 | 1983-07-29 | Cleaning of roasting gas exhausted from roaster |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6030641A true JPS6030641A (en) | 1985-02-16 |
| JPH0220220B2 JPH0220220B2 (en) | 1990-05-08 |
Family
ID=15258830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14001083A Granted JPS6030641A (en) | 1983-07-29 | 1983-07-29 | Cleaning of roasting gas exhausted from roaster |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6030641A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0198469A (en) * | 1987-10-09 | 1989-04-17 | Kondo Unyu Kiko Kk | Cooler for roasted bean in roaster |
| EP0800855A1 (en) * | 1996-04-11 | 1997-10-15 | Sara Lee/DE N.V. | Method for the catalytic oxidation of off-gases |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07175473A (en) * | 1993-04-28 | 1995-07-14 | Nobuhiko Tanaka | Score stand for karaoke (recorded accompaniment) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5721372A (en) * | 1980-05-27 | 1982-02-04 | Smithkline Corp | Imidodisulfamide antiallergic |
| JPS5739610A (en) * | 1980-08-22 | 1982-03-04 | Showa Electric Wire & Cable Co Ltd | Broadband ccd delay line |
-
1983
- 1983-07-29 JP JP14001083A patent/JPS6030641A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5721372A (en) * | 1980-05-27 | 1982-02-04 | Smithkline Corp | Imidodisulfamide antiallergic |
| JPS5739610A (en) * | 1980-08-22 | 1982-03-04 | Showa Electric Wire & Cable Co Ltd | Broadband ccd delay line |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0198469A (en) * | 1987-10-09 | 1989-04-17 | Kondo Unyu Kiko Kk | Cooler for roasted bean in roaster |
| JPH0443632B2 (en) * | 1987-10-09 | 1992-07-17 | Kondo Unyu Kiko Kk | |
| EP0800855A1 (en) * | 1996-04-11 | 1997-10-15 | Sara Lee/DE N.V. | Method for the catalytic oxidation of off-gases |
| NL1002847C2 (en) * | 1996-04-11 | 1997-10-15 | Sara Lee De Nv | Process for the catalytic combustion of waste gases. |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0220220B2 (en) | 1990-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206073094U (en) | A kind of VOC waste gas total system | |
| TWM510193U (en) | Wet coating vent reuse process system | |
| CN108579320A (en) | A kind of concentration-arrangement for catalytic purification, the system and method for low-concentration organic exhaust gas | |
| CN107497245A (en) | A kind of low concentration VOC handling process for improving cycles of concentration, reducing energy consumption | |
| JPH0631132A (en) | Dry dehumidifier | |
| JPS6030641A (en) | Cleaning of roasting gas exhausted from roaster | |
| CN109331629A (en) | Arrangement for catalytic purification and its application method is concentrated in low-concentration organic exhaust gas | |
| CN210065845U (en) | Arch-top type natural gas annealing furnace for stainless steel pipe | |
| WO1992012643A1 (en) | A method for the drying and roasting of coffee and cocoa beans | |
| CN106352355A (en) | Volatile-organic-compound-waste-gas thermal storage oxidation system | |
| CN206996195U (en) | A kind of controllable organic exhaust gas circulation desorption system of concentration | |
| CN205760475U (en) | A kind of rotary gas adsorption device | |
| JP2006230238A (en) | Exhaust purifier in bean roaster | |
| CN106938177A (en) | A kind of organic waste gas treatment equipment | |
| CN209219128U (en) | A kind of coffee bean baking processing unit (plant) | |
| CN206549438U (en) | Organic waste gas treatment system under exhaust gas concentration fluctuation operating mode | |
| CN210141783U (en) | Suspension roasting device for various aluminum oxides | |
| JP2016526905A (en) | Stir-fry machine with thermal decomposition function | |
| JPS60820A (en) | Deodorizing treatment of odorous gas | |
| TWI750899B (en) | Packaged air pollution purification system | |
| CN215373570U (en) | Low NOx belt roasting machine pelletizing device | |
| CN210786743U (en) | VOCs exhaust-gas treatment system | |
| JP3617940B2 (en) | Circulating dryer | |
| CN106765701A (en) | A kind of energy-saving coating production line manufactures feedway with dry air | |
| CN209663034U (en) | A kind of coffee baker emission-control equipment |