JPS646126B2 - - Google Patents
Info
- Publication number
- JPS646126B2 JPS646126B2 JP23014182A JP23014182A JPS646126B2 JP S646126 B2 JPS646126 B2 JP S646126B2 JP 23014182 A JP23014182 A JP 23014182A JP 23014182 A JP23014182 A JP 23014182A JP S646126 B2 JPS646126 B2 JP S646126B2
- Authority
- JP
- Japan
- Prior art keywords
- sulfuric acid
- liquid
- refrigerant
- turbine
- cooler
- 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
Links
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 86
- 239000007788 liquid Substances 0.000 claims description 50
- 239000003507 refrigerant Substances 0.000 claims description 37
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 3
- 238000010248 power generation Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 description 12
- 238000000926 separation method Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 238000005192 partition Methods 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- FPBWSPZHCJXUBL-UHFFFAOYSA-N 1-chloro-1-fluoroethene Chemical group FC(Cl)=C FPBWSPZHCJXUBL-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Engine Equipment That Uses Special Cycles (AREA)
Description
【発明の詳細な説明】
本発明は硫酸製造設備特に接触式硫酸製造設備
における熱エネルギー回収方法に関する。
従来、接触式硫酸製造設備において、乾燥塔若
しくは吸収塔から得られる高温の濃硫酸液を冷却
するのに間接式冷却方法が採用され、またその冷
却器に使用される伝熱材料には優れた耐食性が必
要とされると共に運転温度が低いことが条件とさ
れていた。従つて、上記硫酸製造工程から回収し
得る熱エネルギーが少なかつた。
そこで、本発明は上記欠点を解消し得る硫酸製
造設備における熱エネルギー回収方法を提供する
ことを目的とする。
即ち、本発明は硫酸製造設備において、この製
造工程途中で得られる硫酸液中に、硫酸に対して
安定な冷媒液を混入させて、硫酸液の持つ熱によ
り上記冷媒液を気化させることにより硫酸液の冷
却を行なうと共に、上記気化した冷媒をタービン
に導いて動力発生装置を駆動させた後、凝縮器に
より冷媒を液化し、再びこの冷媒液を上記硫酸液
中に導くことを特徴とする硫酸製造設備における
熱エネルギー回収方法である。
かかる方法によると、硫酸液を冷媒液に直接に
接触させて冷却するようにしたので、従来の間接
式のものに比べて熱交換の効率がよくなると共に
間接式の伝熱材料による温度制限がなく運転温度
を高くでき、従つて従来の製造設備の場合に比べ
て熱エネルギーの回収効率が非常に向上する。
以下、本発明の一実施例を図面に基づき説明す
る。第１図において、１は接触式硫酸製造設備に
おける吸収塔（二重接触式設備においては第１吸
収塔及び第２吸収塔）（又は乾燥塔）で、下部か
らプロセスガス（又は空気）が導入されて上部か
ら抜かれるようにされている。２はプロセスガス
の導入配管、３は同じく取出配管である。４は上
記吸収塔１で得られた高温の濃硫酸液を冷媒によ
り直接冷却する冷却器で、吸収塔１からはポンプ
５を有する硫酸液供給配管６を介して導かれる。
ここで、上記冷却器４を第２図〜第４図に基づき
説明すると、７は竪型且つ円筒状の容器本体で、
その内部は仕切部材８によつて上部の気液分離室
９と下部の接触室１０とに仕切られている。
上記仕切部材８の上部は円錐状の円錐部８ａに
されると共にその下部は容器本体７の側壁７ａと
所定間隔離れた位置で設けられた、円弧部８ｂに
されており、この円弧部８ｂと側壁７ａとの間は
液降下空間１１にされている。更に円錐部８ａの
上端には、気液分離室９と接触室１０とを連通す
る第１連通口１２が設けられると共に、円弧部８
ｂには気液分離室９側の液降下空間１１と接触室
１０とを連通する第２連通口１３が上下に亘つて
複数個設けられている。なお、上記液降下空間１
１の底部は開放されて接触室１０に連通してい
る。１４は容器本体７の側壁７ａ上部に且つ気液
分離室９に対応する位置で設けられた硫酸液供給
口で、上記硫酸液供給配管６に接続されている。
１５は同じく側壁７ａ下部に且つ接触室１０に対
応する位置で設けられた冷媒液供給口、１６は容
器本体７の頂部に設けられたデミスター１７を有
する冷媒取出口、１８は同じく底部に設けられた
硫酸液取出口で、硫酸液戻り配管１９を介して上
記吸収塔１に戻される。なお、２０は硫酸液戻り
配管１９途中から分岐された硫酸液取出配管で、
ここから94〜98％濃度の濃硫酸液が取出される。
２１は上記冷却器４で気化された冷媒により回転
駆動されるタービン、２２はタービン２１によつ
て作動させられる動力発生装置（例えば圧縮式ヒ
ートポンプ、発電機など）、２３は冷却器４の冷
媒取出口１６とタービン２１とを接続する冷媒移
送配管、２４はタービン２１から出た冷媒を冷却
器４に戻す冷媒戻り配管、２５は冷媒戻り配管２
４途中に設けられた冷媒の凝縮器、２６は同じく
冷媒戻り配管２４途中に設けられた冷媒液の移送
ポンプである。なお、２７は凝縮器２５における
冷却水配管、２８は上記吸収塔１の下部に接続さ
れた濃度調整用硫酸液（又は水）供給配管であ
る。また、上記冷却器４、タービン２１、凝縮器
２５及び移送ポンプ２６によつてランキンサイク
ルが構成されている。
次に、動作について説明する。
まず、吸収塔１で得られた温度の高い濃硫酸液
は冷却器４に送られて、硫酸に対して安定な冷媒
液（例えば飽和炭化水素系冷媒やクロールフルオ
ロエチレン系冷媒）により熱が奪われる。即ち、
硫酸液供給口１４より気液分離室９内に供給され
た濃硫酸液は、液降下空間１１及び仕切部材８の
第２連通口１３を介して接触室１０内に到り、こ
こで冷媒液により直接冷却される。そして、冷却
された濃硫酸液は液比重が増加して容器本体７内
底部に移動し、硫酸液取出口１８及び硫酸液戻り
配管１９を介して吸収塔１に戻されると共にその
一部が硫酸液取出配管２０を介して取出される。
一方、冷媒液は濃硫酸液との比重差により、接触
室１０内を上昇しながら濃硫酸液から熱を奪つて
気化し、この気化した冷媒は仕切部材８の第１連
通口１２より気液分離室９内に到り、ここで液体
を分離した後、冷媒取出口１６及び冷媒移送配管
２３を介してタービン２１に送られて、動力発生
装置２２を作動させ、その熱エネルギーが回収さ
れる。そして、タービン２１を出た冷媒は凝縮器
２５で凝縮されて移送ポンプ２６により冷媒戻り
配管２４を介して冷却器４に戻される。
上記方法によると、硫酸液を冷媒液に直接に接
触させて冷却するようにしたので、従来の間接式
のものに比べて熱交換の効率がよくなると共に間
接式の伝熱材料による温度制御がなく運転温度を
高くでき、従つて従来の製造設備の場合に比べて
熱エネルギーの回収効率が非常に向上する。
なお、ここで日産1000トンの硫黄燃焼式二重接
触／二重吸収式硫酸製造設備におけるランキンサ
イクルを使用した場合の熱エネルギー回収量を従
来のものと本発明のものとについて比較すると下
記表のようになる。下記表より本発明の方が発電
量が大きいことが判かる。
【表】DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for recovering thermal energy in a sulfuric acid production facility, particularly a catalytic sulfuric acid production facility. Conventionally, in catalytic sulfuric acid production equipment, an indirect cooling method has been adopted to cool the high-temperature concentrated sulfuric acid liquid obtained from the drying tower or absorption tower, and the heat transfer material used for the cooler has excellent properties. Corrosion resistance was required, as well as low operating temperatures. Therefore, less thermal energy could be recovered from the sulfuric acid production process. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for recovering thermal energy in a sulfuric acid production facility that can eliminate the above-mentioned drawbacks. That is, in the sulfuric acid production equipment of the present invention, a refrigerant liquid that is stable against sulfuric acid is mixed into the sulfuric acid liquid obtained during the manufacturing process, and the refrigerant liquid is vaporized by the heat of the sulfuric acid liquid, thereby producing sulfuric acid. A sulfuric acid solution characterized by cooling the liquid, guiding the vaporized refrigerant to a turbine to drive a power generation device, liquefying the refrigerant in a condenser, and then guiding this refrigerant liquid into the sulfuric acid liquid again. This is a method of recovering thermal energy in manufacturing equipment. According to this method, the sulfuric acid liquid is cooled by bringing it into direct contact with the refrigerant liquid, so the efficiency of heat exchange is better than that of the conventional indirect method, and there is no temperature limit due to the heat transfer material of the indirect method. Operating temperatures can be increased and therefore the efficiency of thermal energy recovery is greatly improved compared to conventional production equipment. Hereinafter, one embodiment of the present invention will be described based on the drawings. In Figure 1, 1 is an absorption tower (first absorption tower and second absorption tower in double contact equipment) (or drying tower) in a catalytic sulfuric acid production facility, into which process gas (or air) is introduced from the bottom. It is made to be pulled out from the top. 2 is a process gas introduction pipe, and 3 is a take-out pipe. Reference numeral 4 denotes a cooler that directly cools the high temperature concentrated sulfuric acid solution obtained in the absorption tower 1 using a refrigerant, and is led from the absorption tower 1 via a sulfuric acid solution supply pipe 6 having a pump 5.
Here, the cooler 4 will be explained based on FIGS. 2 to 4. 7 is a vertical and cylindrical container body;
The interior thereof is partitioned by a partition member 8 into an upper gas-liquid separation chamber 9 and a lower contact chamber 10. The upper part of the partition member 8 is a conical part 8a, and the lower part is an arc part 8b provided at a predetermined distance from the side wall 7a of the container body 7. A liquid falling space 11 is formed between the side wall 7a and the side wall 7a. Further, a first communication port 12 that communicates the gas-liquid separation chamber 9 and the contact chamber 10 is provided at the upper end of the conical portion 8a, and a first communication port 12 is provided at the upper end of the conical portion 8a.
b is provided with a plurality of second communication ports 13 vertically extending between the liquid drop space 11 on the gas-liquid separation chamber 9 side and the contact chamber 10. In addition, the liquid descending space 1
The bottom of 1 is open and communicates with the contact chamber 10. Reference numeral 14 denotes a sulfuric acid solution supply port provided at the upper part of the side wall 7a of the container body 7 at a position corresponding to the gas-liquid separation chamber 9, and is connected to the sulfuric acid solution supply pipe 6.
15 is also a refrigerant liquid supply port provided at the lower part of the side wall 7a and at a position corresponding to the contact chamber 10, 16 is a refrigerant outlet having a demister 17 provided at the top of the container body 7, and 18 is also provided at the bottom. The sulfuric acid solution is returned to the absorption tower 1 via the sulfuric acid solution return pipe 19 at the sulfuric acid solution outlet. In addition, 20 is a sulfuric acid liquid extraction pipe branched from the middle of the sulfuric acid liquid return pipe 19,
A concentrated sulfuric acid solution with a concentration of 94-98% is extracted from here.
21 is a turbine rotationally driven by the refrigerant vaporized by the cooler 4; 22 is a power generation device (for example, a compression heat pump, a generator, etc.) operated by the turbine 21; and 23 is a refrigerant intake of the cooler 4; A refrigerant transfer pipe connects the outlet 16 and the turbine 21, 24 is a refrigerant return pipe that returns the refrigerant from the turbine 21 to the cooler 4, and 25 is a refrigerant return pipe 2.
A refrigerant condenser 26 is provided in the middle of the refrigerant return pipe 24, and a refrigerant liquid transfer pump 26 is also provided in the middle of the refrigerant return pipe 24. Note that 27 is a cooling water pipe in the condenser 25, and 28 is a concentration-adjusting sulfuric acid solution (or water) supply pipe connected to the lower part of the absorption tower 1. Furthermore, the cooler 4, turbine 21, condenser 25, and transfer pump 26 constitute a Rankine cycle. Next, the operation will be explained. First, the high-temperature concentrated sulfuric acid liquid obtained in the absorption tower 1 is sent to the cooler 4, where heat is removed by a refrigerant liquid that is stable against sulfuric acid (for example, a saturated hydrocarbon refrigerant or a chlorofluoroethylene refrigerant). be exposed. That is,
The concentrated sulfuric acid solution supplied into the gas-liquid separation chamber 9 from the sulfuric acid solution supply port 14 reaches the contact chamber 10 via the liquid descent space 11 and the second communication port 13 of the partition member 8, where it is mixed with the refrigerant liquid. directly cooled by The cooled concentrated sulfuric acid liquid increases in liquid specific gravity and moves to the inner bottom of the container body 7, and is returned to the absorption tower 1 via the sulfuric acid liquid outlet 18 and the sulfuric acid liquid return pipe 19, and a part of it is sulfuric acid The liquid is taken out via the liquid take-out pipe 20.
On the other hand, due to the difference in specific gravity between the refrigerant liquid and the concentrated sulfuric acid liquid, the refrigerant liquid rises in the contact chamber 10 and removes heat from the concentrated sulfuric acid liquid and vaporizes. After reaching the separation chamber 9 and separating the liquid there, it is sent to the turbine 21 via the refrigerant outlet 16 and the refrigerant transfer pipe 23 to operate the power generator 22 and recover its thermal energy. . The refrigerant exiting the turbine 21 is condensed in a condenser 25 and returned to the cooler 4 via a refrigerant return pipe 24 by a transfer pump 26. According to the above method, the sulfuric acid liquid is cooled by bringing it into direct contact with the refrigerant liquid, which improves the efficiency of heat exchange compared to the conventional indirect method, and eliminates the need for temperature control using indirect heat transfer materials. The operating temperature can be increased and therefore the efficiency of thermal energy recovery is greatly improved compared to conventional production equipment. In addition, when comparing the amount of thermal energy recovered when using the Rankine cycle in a sulfur combustion type double contact/double absorption type sulfuric acid production facility with a daily production capacity of 1000 tons, the conventional type and the present invention are shown in the table below. It becomes like this. From the table below, it can be seen that the amount of power generated is larger in the present invention. 【table】
図面は本発明の一実施例を示すもので、第１図
は概略フローチヤート図、第２図は冷却器の断面
図、第３図は第２図の−矢視断面図、第４図
は第２図の−矢視断面図である。
１……吸収塔、４……冷却器、６……硫酸液供
給配管、７……容器本体、７ａ……側壁、８……
仕切部材、９……気液分離室、１０……接触室、
１１……液降下空間、１２……第１連通口、１３
……第２連通口、１９……硫酸液戻り配管、２０
……硫酸液取出配管、２１……タービン、２２…
…動力発生装置、２３……冷媒移送配管、２４…
…冷媒戻り配管、２５……凝縮器、２６……移送
ポンプ。
The drawings show one embodiment of the present invention, and FIG. 1 is a schematic flowchart, FIG. 2 is a sectional view of the cooler, FIG. 3 is a sectional view taken along the - arrow in FIG. 2, and FIG. FIG. 2 is a sectional view taken along the - arrow in FIG. 2; DESCRIPTION OF SYMBOLS 1... Absorption tower, 4... Cooler, 6... Sulfuric acid liquid supply piping, 7... Container body, 7a... Side wall, 8...
Partition member, 9... gas-liquid separation chamber, 10... contact chamber,
11...Liquid descent space, 12...First communication port, 13
...Second communication port, 19...Sulfuric acid solution return pipe, 20
...Sulfuric acid liquid extraction piping, 21...Turbine, 22...
...Power generator, 23... Refrigerant transfer piping, 24...
... Refrigerant return pipe, 25 ... Condenser, 26 ... Transfer pump.
Claims (1)
得られる硫酸液中に、硫酸に対して安定な冷媒液
を混入させて、硫酸液の持つ熱により上記冷媒液
を気化させることにより硫酸液の冷却を行なうと
共に、上記気化した冷媒をタービンに導いて動力
発生装置を駆動させた後、凝縮器により冷媒を液
化し、再びこの冷媒液を上記硫酸液中に導くこと
を特徴とする硫酸製造設備における熱エネルギー
回収方法。1. In sulfuric acid manufacturing equipment, a refrigerant liquid that is stable against sulfuric acid is mixed into the sulfuric acid liquid obtained during the manufacturing process, and the refrigerant liquid is vaporized by the heat of the sulfuric acid liquid, thereby cooling the sulfuric acid liquid. At the same time, the vaporized refrigerant is guided to a turbine to drive a power generation device, and then the refrigerant is liquefied by a condenser, and the refrigerant liquid is again introduced into the sulfuric acid liquid. Energy recovery methods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23014182A JPS59116106A (en) | 1982-12-22 | 1982-12-22 | Method for recovering heat energy in equipment for manufacturing sulfuric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23014182A JPS59116106A (en) | 1982-12-22 | 1982-12-22 | Method for recovering heat energy in equipment for manufacturing sulfuric acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59116106A JPS59116106A (en) | 1984-07-04 |
| JPS646126B2 true JPS646126B2 (en) | 1989-02-02 |
Family
ID=16903221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23014182A Granted JPS59116106A (en) | 1982-12-22 | 1982-12-22 | Method for recovering heat energy in equipment for manufacturing sulfuric acid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59116106A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0579361U (en) * | 1992-03-24 | 1993-10-29 | 日立造船株式会社 | Heat recovery equipment in sulfuric acid plant |
| JP2010203376A (en) * | 2009-03-05 | 2010-09-16 | Sumitomo Metal Mining Co Ltd | Evaporator in power generation system |
| JP2016517389A (en) * | 2013-03-15 | 2016-06-16 | メックス・インコーポレイテッドＭｅｃｓ， Ｉｎｃ． | Recovery of sulfur trioxide absorption heat |
| CN106609685A (en) * | 2015-10-26 | 2017-05-03 | 安徽华尔泰化工股份有限公司 | Sulfuric acid HRS (Heat Recycling System) type high-temperature acid power generation device |
-
1982
- 1982-12-22 JP JP23014182A patent/JPS59116106A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59116106A (en) | 1984-07-04 |
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