JPS6034403B2 - Regeneration tower top gas cooling device for wastewater treatment equipment - Google Patents
Regeneration tower top gas cooling device for wastewater treatment equipmentInfo
- Publication number
- JPS6034403B2 JPS6034403B2 JP51136749A JP13674976A JPS6034403B2 JP S6034403 B2 JPS6034403 B2 JP S6034403B2 JP 51136749 A JP51136749 A JP 51136749A JP 13674976 A JP13674976 A JP 13674976A JP S6034403 B2 JPS6034403 B2 JP S6034403B2
- Authority
- JP
- Japan
- Prior art keywords
- regeneration tower
- condenser
- amount
- temperature
- cooling device
- 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
- 230000008929 regeneration Effects 0.000 title claims description 16
- 238000011069 regeneration method Methods 0.000 title claims description 16
- 238000001816 cooling Methods 0.000 title claims description 7
- 238000004065 wastewater treatment Methods 0.000 title claims description 5
- 239000002351 wastewater Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 14
- 239000000498 cooling water Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 5
- 238000010992 reflux Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
- Gas Separation By Absorption (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Description
【発明の詳細な説明】
本発明は、アンモニア、硫化水素などの腐食性物質を含
む廃水の処理装置に関し、特にその再生塔塔頂ガス冷却
装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for treating wastewater containing corrosive substances such as ammonia and hydrogen sulfide, and more particularly to an overhead gas cooling apparatus for the regeneration tower.
廃水処理装置は、廃水中に多量に含まれるアンモニア（
ＮＨ３）、硫化水素（日２Ｓ）を蒸発分離することによ
り、廃水の浄化を図っている。Wastewater treatment equipment removes ammonia (which is contained in large amounts in wastewater).
Wastewater is purified by evaporating and separating NH3) and hydrogen sulfide (NH2S).
この蒸発分離に蒸留再生塔が用いられる（以下単に再生
塔という）が、ＮＨ３，舷Ｓ等の腐食性物質を含有する
廃水を取扱う関係上数多〈の腐食例がある。特に、再生
塔塔頂凝縮器（以下単に凝縮器という）およびその下流
側（リフラックスラィン含み）は、凝縮水中に気液平衡
状態で多量のＮＨ３および日２Ｓが含まれているため腐
食を受けやすい。この部分の腐食を防ぐためには、適正
な配管材料の選定とともに、凝縮器出口温度を高く保ち
凝縮水中のＮＨ３，日２Ｓ等の濃度を低く抑えることが
必要である。しかし、凝縮器出口温度を上げすぎると、
廃水処理装置発生ガス（アシッドガス）中に含まれる水
蒸気分が多くなり、下流側の装置（例えば、硫黄回収装
置）の能力不足がメンテナンス上問題となりやすい。A distillation regeneration tower is used for this evaporative separation (hereinafter simply referred to as a regeneration tower), but there are many cases of corrosion due to the handling of wastewater containing corrosive substances such as NH3 and S. In particular, the regeneration tower top condenser (hereinafter simply referred to as the condenser) and its downstream side (including the reflux line) are susceptible to corrosion because the condensed water contains a large amount of NH3 and 2S in a vapor-liquid equilibrium state. Cheap. In order to prevent corrosion of this part, it is necessary to select an appropriate piping material, keep the condenser outlet temperature high, and keep the concentration of NH3, 2S, etc. in the condensed water low. However, if the condenser outlet temperature is raised too much,
The amount of water vapor contained in the gas (acid gas) generated by the wastewater treatment equipment increases, and insufficient capacity of downstream equipment (for example, sulfur recovery equipment) tends to become a problem in terms of maintenance.
そのため凝縮器出口温度は一般に８０〜１２０００に調
節されている。Therefore, the condenser outlet temperature is generally adjusted to 80 to 12,000.
第１図および第２図に従来の冷却装置をブロック図で示
す。FIGS. 1 and 2 show block diagrams of conventional cooling devices.
第１図および第２図において、１０は再生塔、１２は水
冷却による凝縮器、１４，２２は流量制御弁、１６は温
度検出器、１８は凝縮水を収容するりフラツクスドラム
である。凝縮器１２にはパイプ２０より冷却水が供給さ
れる。第１図の冷却装置では、塔頂凝縮器１２のバイパ
スラインに流量制御弁１４を有し、塔頂ガスのバイパス
量の多少により凝縮器出口温度を調節するものである。
この装置の欠点は、凝縮器１２およびその出口からバイ
パスライン合流部までのラインの温度が下がりすぎるた
め、凝縮水中のＮＨ３，日２Ｓ濃度が高くなり、腐食を
受けやすいことである。In FIGS. 1 and 2, 10 is a regeneration tower, 12 is a water-cooled condenser, 14 and 22 are flow rate control valves, 16 is a temperature detector, and 18 is a flux drum containing condensed water. Cooling water is supplied to the condenser 12 from a pipe 20. The cooling device shown in FIG. 1 has a flow rate control valve 14 in the bypass line of the tower top condenser 12, and adjusts the condenser outlet temperature depending on the bypass amount of the tower top gas.
A disadvantage of this device is that the temperature of the condenser 12 and the line from its outlet to the bypass line junction is too low, resulting in high NH3, 2S concentrations in the condensed water, making it susceptible to corrosion.
又、第２図の装置は、凝縮器１２の冷却水パイプ２０流
量制御弁２２を有し、冷却水量の多少により、凝縮器出
口温度を調節するものであるが、この装置の欠点は冷却
水量低下時、冷却水流速低下や冷却水出口温度上昇のた
め凝縮器チューブに泥状物が付着し、熱交換性能が著し
く低下することである。本発明は、上記従来装直の欠点
を改善することを目的としたものである。Furthermore, the device shown in FIG. 2 has a cooling water pipe 20 and a flow rate control valve 22 for the condenser 12, and adjusts the condenser outlet temperature depending on the amount of cooling water, but the drawback of this device is that the amount of cooling water When the cooling water flow rate decreases and the cooling water outlet temperature increases, mud adheres to the condenser tubes and heat exchange performance deteriorates significantly. The present invention aims to improve the drawbacks of the above-mentioned conventional reinstallation.
一般に、再生塔塔頂ガスの凝縮器出口温度は該ガス中の
凝縮水量、再生塔塔頂温度、冷却水温度、凝縮器チュー
ブの汚れ等により変化するが、このうち凝縮水量の変化
により最も大きく影響を受ける。In general, the condenser outlet temperature of the regeneration tower top gas changes depending on the amount of condensed water in the gas, the top temperature of the regeneration tower, the temperature of the cooling water, dirt on the condenser tube, etc. Among these, the change in the amount of condensed water is the largest. to be influenced.
従って凝縮水量調節による凝縮器出口温度調節法が最も
有効である。凝縮水量は廃水処理装置に供給される廃水
処理量の変動の影響を受けやすく、それ自体凝縮器出口
温度の大きな変動原因であった。Therefore, the most effective method is to adjust the condenser outlet temperature by adjusting the amount of condensed water. The amount of condensed water is easily affected by fluctuations in the amount of wastewater supplied to the wastewater treatment device, which itself is a cause of large fluctuations in the condenser outlet temperature.
そこで、本発明においてはスチーム投入量調節により凝
縮水量の変動を抑制し、合わせて、凝縮器出口温度の調
節を行なう構成とした。Therefore, in the present invention, fluctuations in the amount of condensed water are suppressed by adjusting the amount of steam input, and at the same time, the condenser outlet temperature is adjusted.
第３図に本発明の一実施例を示す。FIG. 3 shows an embodiment of the present invention.
第３図において、２４は本発明により設置されたスチー
ム投入パイプ、２６は流量制御弁である。流量制御弁２
６は、温度検出器１６により闇度制御又は開閉制御され
、凝縮器１２の出口温度が低下したときにはスチーム投
入量を多くし、出口温度が上昇したときにはスチーム投
入量を少なくする如く制御される。また、温度検出器１
６又は流量制御弁２６の設定値を上げると、スチーム投
入量が増えて凝縮器出口温度が上昇する。再生塔塔頂ガ
ス量、再生塔塔頂温度、冷却水温度、凝縮器チューブの
汚れ等の変化に対しては、自動的にスチーム投入量が調
節されて凝縮器出口温度は一定に保たれる。In FIG. 3, 24 is a steam input pipe installed according to the present invention, and 26 is a flow control valve. Flow control valve 2
6 is controlled by the temperature detector 16 to control darkness or opening/closing, and is controlled so that when the outlet temperature of the condenser 12 decreases, the amount of steam input is increased, and when the outlet temperature rises, the amount of steam input is decreased. In addition, temperature sensor 1
6 or the set value of the flow control valve 26 is increased, the amount of steam input increases and the condenser outlet temperature rises. In response to changes in the amount of gas at the top of the regeneration tower, temperature at the top of the regeneration tower, cooling water temperature, dirt on the condenser tube, etc., the amount of steam input is automatically adjusted to keep the condenser outlet temperature constant. .
第３図の実施例において、リフラックスドラム１８で分
離される不凝縮ガス（アシッドガス）は、硫黄回収装置
又はィンシネレータ等（図示せず）に送られる。In the embodiment of FIG. 3, the non-condensable gas (acid gas) separated in the reflux drum 18 is sent to a sulfur recovery device, an incinerator, etc. (not shown).
ドラム１８内の凝縮液はポンプおよび流量制御弁（図示
せず）を通して再生塔、再生塔フィードラィン又は再生
塔サージドラム等（図示せず）に供給される。以上の如
く、凝縮器１２の入側にスチーム投入パイプを接続して
、スチーム投入量を凝縮器１２出側温度で制御するよう
にしたので、凝縮器１２出口からリフラックスドラム１
８に至る流路の温度は腐食を低減するに必要な温度に一
定に保持することができる。The condensate in the drum 18 is supplied to a regeneration tower, a regeneration tower feed line, a regeneration tower surge drum, etc. (not shown) through a pump and a flow control valve (not shown). As described above, since the steam input pipe is connected to the inlet side of the condenser 12 and the amount of steam input is controlled by the temperature at the outlet side of the condenser 12, the reflux drum 1
The temperature of the flow path leading to 8 can be kept constant at the temperature necessary to reduce corrosion.
スチーム投入量で温度制御するため、冷却水量調整の場
合よりも応答性がよい。一般に冷却水量調整では広範囲
の調整は困難であるが、スチーム投入はその制御が容易
であり、また応答が速いため制御精度を高めるにおいて
効果的である。なお、本発明に更に従来の冷却水量制御
系を付加することもできる。Since the temperature is controlled by the amount of steam input, the response is better than when adjusting the amount of cooling water. In general, it is difficult to adjust the amount of cooling water over a wide range, but steam injection is easy to control and has a quick response, so it is effective in increasing control accuracy. Note that a conventional cooling water amount control system can also be added to the present invention.
第１図および第２図は、従来の冷却装置を示すブロック
図、第３図は本発明の一実施例を示すブロック図である
。
なお、図中同一符号は同一又は相当部分を示す。
１０：再生塔、１２：凝縮器、１４，２２，２６：流量
制御弁、１６：温度検出器、１８：リフラックスドラム
、２０：冷却水供給パイプ、２４：スチーム投入パイプ
。
第１図
第２図
第３図1 and 2 are block diagrams showing a conventional cooling device, and FIG. 3 is a block diagram showing an embodiment of the present invention. Note that the same reference numerals in the figures indicate the same or equivalent parts. 10: Regeneration tower, 12: Condenser, 14, 22, 26: Flow rate control valve, 16: Temperature detector, 18: Reflux drum, 20: Cooling water supply pipe, 24: Steam input pipe. Figure 1 Figure 2 Figure 3
Claims (1)
却す冷却装置において、塔頂ガスの塔頂凝縮器入側に連
結したスチーム投入パイプ、スチーム投入パイプに介挿
した流量制御弁および塔頂凝縮器の出側に設置した温度
検出器を備え、該温度検出器の検出温度により上記流量
制御弁を作動せしめスチーム投入量を制御して塔頂凝縮
器の出側温度を制御する構成とした、廃水処理装置の再
生塔塔頂ガス冷却装置。1 In a cooling device that cools the top gas in the top condenser of a regeneration tower that processes wastewater, a steam input pipe connected to the top condenser input side of the top gas, and a flow control valve inserted in the steam input pipe. and a temperature detector installed on the outlet side of the top condenser, and the temperature detected by the temperature detector operates the flow rate control valve to control the amount of steam input to control the temperature at the outlet side of the top condenser. This is a regeneration tower top gas cooling device of a wastewater treatment equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51136749A JPS6034403B2 (en) | 1976-11-13 | 1976-11-13 | Regeneration tower top gas cooling device for wastewater treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51136749A JPS6034403B2 (en) | 1976-11-13 | 1976-11-13 | Regeneration tower top gas cooling device for wastewater treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5361167A JPS5361167A (en) | 1978-06-01 |
| JPS6034403B2 true JPS6034403B2 (en) | 1985-08-08 |
Family
ID=15182597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP51136749A Expired JPS6034403B2 (en) | 1976-11-13 | 1976-11-13 | Regeneration tower top gas cooling device for wastewater treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6034403B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0651081B2 (en) * | 1984-11-21 | 1994-07-06 | 三井東圧化学株式会社 | How to operate the distillation column |
-
1976
- 1976-11-13 JP JP51136749A patent/JPS6034403B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5361167A (en) | 1978-06-01 |
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