JP2006289303A - Method and equipment for treating cooling water - Google Patents
Method and equipment for treating cooling water Download PDFInfo
- Publication number
- JP2006289303A JP2006289303A JP2005115954A JP2005115954A JP2006289303A JP 2006289303 A JP2006289303 A JP 2006289303A JP 2005115954 A JP2005115954 A JP 2005115954A JP 2005115954 A JP2005115954 A JP 2005115954A JP 2006289303 A JP2006289303 A JP 2006289303A
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- water
- cooling
- circulation system
- vacuum
- 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
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Physical Water Treatments (AREA)
- Blast Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Furnace Details (AREA)
- Degasification And Air Bubble Elimination (AREA)
Abstract
Description
本発明は、金属製錬や製鉄、発電設備等の冷却系において、循環使用される冷却水の処理方法と処理設備に関する。より詳しくは、本発明は、冷却水を循環使用する冷却系において、冷却水の一部を抜き出して新たな冷却水を補給する際に、この抜き出した冷却水を循環系の冷却水が保有する熱量を利用して蒸発減量することによって、廃液処理の負担を軽減すると共に冷却水の有効利用を図る冷却水の処理方法と処理設備に関する。 The present invention relates to a treatment method and treatment equipment for cooling water that is circulated in a cooling system such as metal smelting, iron making, and power generation equipment. More specifically, in the cooling system in which the cooling water is circulated and used, when the cooling water is extracted and replenished with new cooling water, the cooling water in the circulation system holds the extracted cooling water. The present invention relates to a cooling water treatment method and treatment equipment that reduces the burden of waste liquid treatment by reducing evaporation by using heat, and at the same time effectively uses cooling water.
金属製錬や製鉄、発電設備等の冷却系においては多量の冷却水が使用されている。例えば金属製錬では溶融炉等から排出された高温の溶融スラグを水砕して再資源化している(特許文献1)。この水砕処理の際に多量の水を使用するため、水資源の有効利用や処理コストの低減等のために冷却水を冷却工程に循環して再使用している。このような冷却水が循環使用される冷却系では、通常、循環する冷却水の汚染や劣化を抑制するため、冷却水の一部を抜き出して新たな冷却水を補給している。 A large amount of cooling water is used in cooling systems such as metal smelting, iron making, and power generation facilities. For example, in metal smelting, high-temperature molten slag discharged from a melting furnace or the like is granulated and recycled (Patent Document 1). Since a large amount of water is used in the water granulation treatment, the cooling water is circulated and reused in the cooling process in order to effectively use water resources and reduce processing costs. In such a cooling system in which cooling water is circulated, in order to suppress contamination and deterioration of the circulating cooling water, a part of the cooling water is extracted and replenished with new cooling water.
例えば、溶融スラグの水砕工程では、冷却水が溶融スラグに接触したときに汚染物が溶け込み、冷却水の循環使用を繰り返すごとに汚染物が次第に蓄積するので、冷却水の一部を定期的に抜き出して系外に排出し、新しい水を補給している。具体的には、図2に示すように、例えば、1500t/Hrの冷却水を水砕工程に循環して、溶融スラグ約59t/Hrを連続して水砕する場合、1時間当たりの循環使用ごとに約3t/Hrの水量が水砕スラグに付着して系外に搬出され、さらに約10t/Hrの水量を系外に抜き出し、約13t/Hrの水を補給しており、補給に必要な水量が多い。 For example, in the process of granulating molten slag, contaminants dissolve when the cooling water comes into contact with the molten slag, and the contaminants gradually accumulate every time the cooling water is circulated. The water is extracted out of the system and replenished with new water. Specifically, as shown in FIG. 2, for example, when circulating cooling water of 1500 t / Hr to the water granulation step and continuously granulating about 59 t / Hr of molten slag, circulation use per hour About 3t / Hr of water adheres to the granulated slag every time and is carried out of the system. Further, about 10t / Hr of water is taken out of the system and about 13t / Hr of water is replenished. There is a lot of water.
また、従来の水砕工程では、溶融スラグの熱量をそのまま系外に放出しており、エネルギーが無駄に失われている。具体的には、例えば、溶融スラグと接触した冷却水は水温が上昇しているので、この水を冷却水として循環使用するには水温を下げる必要があり、水温の上昇した冷却水を海水によって冷却している。この冷却に使用した海水は熱交換によって水温が上昇しているが、従来はそのまま海に排出しており、熱エネルギーが無駄に失われている。 Moreover, in the conventional water granulation process, the calorie | heat amount of molten slag is discharged | emitted out of the system as it is, and energy is lost wastefully. Specifically, for example, the cooling water that has come into contact with the molten slag has an increased water temperature. Therefore, in order to circulate and use this water as cooling water, it is necessary to lower the water temperature. It is cooling. Although the seawater used for this cooling has risen in water temperature due to heat exchange, it has been discharged into the sea as it is and heat energy has been lost wastefully.
金属製錬や製鉄、発電設備などにおいても同様であり、冷却水を循環使用する際に、従来は多量の冷却水が系外に放出されており、水資源および熱エネルギーが無駄に失われている。
本発明は、冷却水を循環使用する従来の冷却系における上記問題を解決したものであり、冷却水が有する熱量を有効に利用して蒸発処理を行うことによって廃液量を減少し、廃液処理の負担を軽減すると共に蒸発水を循環系に戻して補給水量を低減した冷却水の処理方法と処理設備を提供する。 The present invention solves the above-mentioned problem in the conventional cooling system that circulates and uses cooling water, and reduces the amount of waste liquid by performing the evaporation process by effectively using the amount of heat that the cooling water has. Provided is a cooling water treatment method and treatment equipment that reduces the burden and reduces the amount of makeup water by returning evaporated water to the circulation system.
本発明によれば、以下の構成を有する冷却水の処理方法と、その処理設備が提供される。
(1)水温が上昇した冷却水を冷却して循環使用する冷却系において、冷却水の一部を循環系から抜き出して真空蒸発部に導き、循環系の冷却水が保有する熱を利用して真空蒸発させ、蒸発残を系外に排出し、蒸気を冷却凝縮して循環系に戻し再使用することを特徴とする冷却水の処理方法。
(2)冷却水が、溶融スラグの水砕用冷却水、炉の水冷ジャケットの冷却水、製鉄の圧延工程における冷却水、または発電設備の冷却系を循環する冷却水である上記(1)に記載する冷却水の処理方法。
(3)溶融スラグを水砕処理する際に、溶融スラグに接触して水温が上昇した冷却水を冷却して再び水砕用の冷却水として循環使用する方法において、冷却水の一部を循環系から抜き出して真空蒸発部に導き、溶融スラグに接触して水温が上昇した冷却水の熱を利用して真空蒸発させ、蒸発残を系外に排出する一方、蒸気を海水等の自然水によって冷却凝縮して循環系に戻し、また真空蒸発部の熱交換を経た循環系の冷却水を海水等の自然水によって冷却して再使用する上記(1)に記載する冷却水の処理方法。
(4)循環系から抜き出した冷却水に窒素ガスを導入して溶存ガスを冷却水から追い出した後に該冷却水を真空蒸発させる上記(1)〜(3)の何れかに記載する冷却水の処理方法。」
(5)真空蒸発部で熱交換を行った循環系の冷却水が保有する熱をさらに別系統の廃液の加熱源として利用する上記(1)〜(4)の何れかに記載する冷却水の処理方法。
(6)スラグ水砕水の処理設備であって、冷却水を循環使用するための循環系、溶融スラグに冷却水を接触させて砕く水砕部、冷却水の一部を循環系から抜き出して蒸発させる真空蒸発部、溶融スラグに接触して水温が上昇した冷却水の熱を加熱源とする真空蒸着部の熱交換部、真空蒸発した蒸気を海水等の自然水によって冷却する凝縮部、この凝縮水を循環系に戻す管路、蒸発残を系外に排出する管路、循環系の冷却水を海水等の自然水によって冷却する冷却部を有することを特徴とするスラグ水砕水の処理設備。
(7)冷却水に窒素ガスを導入して溶存ガスを追い出すガス導入部が真空蒸発部の冷却水導入部分に設けられている上記(6)に記載するスラグ水砕水の処理設備。
According to this invention, the processing method of the cooling water which has the following structures, and its processing equipment are provided.
(1) In a cooling system that circulates and uses cooling water whose water temperature has risen, a part of the cooling water is extracted from the circulation system and led to the vacuum evaporation section, and the heat held by the cooling water in the circulation system is used. A method for treating cooling water, characterized by evaporating in a vacuum, discharging the evaporation residue outside the system, cooling and condensing the vapor, returning it to the circulation system, and reusing it.
(2) In the above (1), the cooling water is a cooling water for granulating molten slag, a cooling water for a furnace water cooling jacket, a cooling water in a steelmaking rolling process, or a cooling water circulating in a cooling system of a power generation facility. A cooling water treatment method to be described.
(3) When the molten slag is subjected to water granulation treatment, a part of the cooling water is circulated in the method of cooling and cooling the cooling water whose temperature has been increased by contacting the molten slag and recirculating as cooling water for granulation. Extracted from the system, led to the vacuum evaporation section, evaporated by vacuum using the heat of the cooling water that contacted the molten slag and the water temperature increased, and the evaporation residue was discharged out of the system, while the steam was discharged by natural water such as seawater The cooling water treatment method according to the above (1), wherein the cooling water in the circulation system after cooling and condensing and returning to the circulation system is cooled and reused by natural water such as seawater.
(4) The cooling water according to any one of (1) to (3) above, wherein nitrogen gas is introduced into the cooling water extracted from the circulation system and the dissolved gas is expelled from the cooling water, and then the cooling water is evaporated in vacuum. Processing method. "
(5) The cooling water according to any one of the above (1) to (4), in which the heat held by the cooling water in the circulation system that has exchanged heat in the vacuum evaporation section is used as a heating source for the waste liquid in another system Processing method.
(6) Treatment equipment for slag water crushed water, a circulation system for circulating cooling water, a pulverized part for bringing molten water into contact with molten slag and crushing, and extracting a part of the cooling water from the circulation system A vacuum evaporating part to evaporate, a heat exchanging part of a vacuum vapor deposition part that uses the heat of cooling water that has been brought into contact with the molten slag as a heating source, a condensing part that cools the vacuum evaporated vapor with natural water such as seawater, Treatment of slag crushed water characterized by having a pipeline for returning condensed water to the circulation system, a pipeline for discharging the evaporation residue outside the system, and a cooling section for cooling the cooling water of the circulation system with natural water such as sea water. Facility.
(7) The slag crushed water treatment facility described in (6) above, wherein a gas introduction part that introduces nitrogen gas into the cooling water and drives out the dissolved gas is provided in the cooling water introduction part of the vacuum evaporation part.
本発明の処理方法は、冷却水を循環使用する際に、循環系から抜き出した一部の冷却水を真空蒸発部に導き、循環系の冷却水が保有する熱を利用して真空蒸発させ、蒸発残を系外に排出するので、排出量が大幅に減少し、廃液処理の負担が格段に軽減される。また、真空蒸発された蒸気を冷却凝縮して循環系に戻し再使用するので、補給に必要な水量も大幅に低減される。さらに、冷却水自体が保有する熱量を利用して真空蒸発させるので、熱エネルギーの有効な利用が図れる。 In the treatment method of the present invention, when the cooling water is circulated and used, a part of the cooling water extracted from the circulation system is led to the vacuum evaporation section, and the heat held by the cooling water in the circulation system is used for vacuum evaporation, Since the evaporation residue is discharged out of the system, the discharge amount is greatly reduced, and the burden of waste liquid treatment is remarkably reduced. Further, since the vapor evaporated in vacuum is cooled and condensed and returned to the circulation system for reuse, the amount of water required for replenishment is greatly reduced. Furthermore, since the heat is held in the cooling water and evaporated in vacuum, the heat energy can be effectively used.
例えば、溶融スラグ水砕水の処理系において、本発明の処理方法は、溶融スラグの水砕に使用した冷却水の一部を循環系から抜き出して真空蒸発させ、その蒸発残を系外に排出するので、廃液量が格段に減少する。また、溶融スラグから冷却水に混入した汚染物は真空蒸発の際に残留物となって残るので、蒸気を冷却凝縮して循環系に戻すことができ、多量の新たな水を補給する必要がない。従って、水資源の有効利用を図ることができる。さらに本発明の処理方法では、冷却水や蒸発水を冷却する自然水の使用量は増加せず、また凝縮水は蒸発して回収したものであるので、純度の高い水が得られる。 For example, in a treatment system for molten slag granulated water, the treatment method of the present invention extracts a part of the cooling water used for molten slag granulation from the circulation system, evaporates it in vacuum, and discharges the evaporation residue outside the system. As a result, the amount of waste liquid is significantly reduced. In addition, since contaminants mixed into the cooling water from the molten slag remain as residues during vacuum evaporation, the steam can be cooled and condensed and returned to the circulation system, and a large amount of new water must be replenished. Absent. Therefore, effective use of water resources can be achieved. Furthermore, in the treatment method of the present invention, the amount of natural water used for cooling the cooling water and the evaporating water does not increase, and the condensed water is recovered by evaporation, so that highly pure water can be obtained.
また、本発明の処理方法は、溶融スラグと接触して水温が上昇した冷却水の保有する熱量によって真空蒸発を行うので、冷却系の熱エネルギーを有効に利用することができ、エネルギーコストを低減することができる。 In addition, since the treatment method of the present invention performs vacuum evaporation by the amount of heat held in the cooling water whose water temperature has increased due to contact with the molten slag, the thermal energy of the cooling system can be used effectively and the energy cost can be reduced. can do.
本発明の処理方法は、以上のような金属製錬における溶融スラグの水砕用冷却水の他に、溶融炉や製錬炉等の各種炉の水冷ジャケットを循環する冷却水、製鉄の圧延工程の冷却系において循環使用される冷却水、または発電設備の冷却系を循環する冷却水などに広く適用することができる。 The treatment method of the present invention is a cooling process for circulating water cooling jackets of various furnaces such as a melting furnace and a smelting furnace, in addition to the cooling water for granulating molten slag in metal smelting as described above, and a rolling process for iron making. The present invention can be widely applied to cooling water that is circulated and used in the cooling system of this type, or cooling water that circulates in the cooling system of power generation equipment.
本発明の処理方法は、水温が上昇した冷却水を冷却して循環使用する冷却系において、冷却水の一部を循環系から抜き出して真空蒸発部に導き、循環系の冷却水が保有する熱を利用して真空蒸発させ、蒸発残を系外に排出し、蒸気を冷却凝縮して循環系に戻し再使用することを特徴とする冷却水の処理方法である。 The treatment method of the present invention is a cooling system for cooling and circulating cooling water whose temperature has risen, extracting a part of the cooling water from the circulation system and leading it to the vacuum evaporation section, and the heat held by the cooling water in the circulation system. This is a method for treating cooling water, characterized by evaporating in a vacuum by using, discharging the evaporation residue outside the system, cooling and condensing the steam, returning it to the circulation system, and reusing it.
以下、本発明の冷却水の処理方法を金属製錬における溶融スラグの水砕用冷却水を例として説明する。本発明の処理方法ないし処理設備の概略を図1に示す。図示するように、本発明の処理システムは、冷却水を循環使用するための循環系40を有しており、溶融スラグを冷却水に接触させて砕く水砕部10と、循環系の冷却水を海水等の自然水によって冷却する冷却部50が循環系40に設けられている。なお、説明の都合上、海水や河川水等を自然水と云う。処理コストを低減するうえで自然水の利用が有利である。 Hereinafter, the cooling water treatment method of the present invention will be described by taking, as an example, cooling water for granulating molten slag in metal smelting. An outline of the processing method or processing equipment of the present invention is shown in FIG. As shown in the figure, the treatment system of the present invention has a circulation system 40 for circulating and using cooling water, and a granulating unit 10 that crushes molten slag in contact with cooling water, and cooling water for the circulation system. The cooling system 50 is provided in the circulation system 40 to cool the water with natural water such as seawater. For convenience of explanation, seawater and river water are referred to as natural water. Use of natural water is advantageous in reducing the treatment cost.
本発明の処理方法システムは、さらに冷却水の一部を循環系から抜き出して蒸発させる真空蒸発部20、溶融スラグに接触して水温が上昇した冷却水が保有する熱を加熱源とする真空蒸着部の熱交換部21、真空蒸発部の真空ポンプ24、真空蒸発した蒸気を海水等の自然水によって冷却する凝縮部30、凝縮部に設けた蒸気と海水との熱交換部31、蒸気を冷却凝縮した凝縮水を循環系に戻す管路32、蒸発残を系外に排出する管路22が循環系40に設けられている。さらに、循環系40には冷却水の補給用管路60が接続している。また、好ましくは、冷却水に窒素ガスを導入して溶存ガスを追い出すガス導入部23が真空蒸発部20の冷却水導入部分に設けられている。
The processing method system of the present invention further includes a
水砕部10において、溶融スラグに冷却水を接触させる方法および手段・設備は通常のものでよい。溶融スラグは冷却水によって急激に冷却されることによって熱歪みを生じて割れ、細粒になる。この水砕スラグはセメント等の資源として再利用される。 In the granulated portion 10, the method and means / equipment for bringing the cooling water into contact with the molten slag may be normal. When the molten slag is rapidly cooled by the cooling water, the molten slag is cracked into fine particles by causing thermal distortion. This granulated slag is reused as a resource such as cement.
水砕部10において溶融スラグに接触した冷却水は例えば水温が約55℃に上昇する。本発明の処理システムは、この水温が上昇した冷却水が保有する熱を利用して、循環系から抜き出した冷却水を真空蒸発させる。図示する例では、水砕部10を経過した循環系40の管路に真空蒸発部20が設けられている。
The cooling water that has come into contact with the molten slag in the granulated portion 10 has a water temperature, for example, rising to about 55 ° C. In the treatment system of the present invention, the cooling water extracted from the circulation system is vacuum-evaporated using the heat held by the cooling water whose temperature has risen. In the illustrated example, the
真空蒸発部20の冷却水導入部分にはガス導入部23が設けられている。溶融スラグに接触した冷却水にはスラグからガス成分が混入して溶存ガスが含まれている場合がある。この溶存ガス量が多いと冷却水を100℃以下で蒸発させるための真空度を保つのが難しくなるので、このような場合には、真空蒸発部20の冷却水導入部分にガス導入部23を設け、循環系から抜き出した冷却水に窒素ガス等を導入して溶存ガスを追い出した後に真空蒸発させると良い。
A gas introduction part 23 is provided in the cooling water introduction part of the
真空蒸発部20には熱交換部21が設けられている。熱交換部21は、例えば真空蒸発部20を貫通する多数のパイプ(図示省略)によって形成すれば良く、該パイプは循環系40の一部を形成しており、溶融スラグに接触して水温が上昇した冷却水が上記パイプを流れる間に、この冷却水の保有する熱量によって真空蒸発部20が加熱され、真空蒸発部20に導かれた冷却水が蒸発する。
The
例えば、水砕部10を経過した冷却水は溶融スラグとの接触によって約55℃前後に上昇した冷却水を熱交換部21に導き、真空蒸発部20を加熱する。真空蒸発部20は真空ポンプ24によって適度な真空に保たれており、循環系40から抜き出した冷却水を真空下に導くことによって、約55℃程度の温度下で蒸発させることができる。真空蒸発部20は減圧密閉容器によって形成することができる。なお、真空ポンプ24は多量の水蒸気が入り込まないように凝縮部30の最後部に設けると良い。真空蒸発部20と凝縮部30とは真空ポンプ24の吸引によって該真空蒸発部20を真空に保つのに十分な口径の管路25によって連通されている。また、真空蒸発部20には補助加熱用のヒータを設けてもよい。熱交換部21を経過した冷却水は熱交換によって水温が約50℃前後に低下し、これを冷却部50に導いてさらに冷却する。
For example, the cooling water that has passed through the water granulating unit 10 guides the cooling water that has risen to about 55 ° C. by contact with the molten slag to the heat exchanging unit 21 and heats the
一方、真空蒸発部20において循環系から抜き出した冷却水を蒸発させ、その蒸発残を系外に排出することによって廃液量が大幅に減少し、廃液処理の負担が格段に軽減される。具体的には、例えば、循環系から約10t/Hrの冷却水を抜き出した場合でも、真空蒸発によって廃液量を約1t/Hrに減量することができ、また溶融スラグとの接触によって冷却水に混入した汚染物の大部分は蒸発せずに残留するので、概ね約9t/Hrの蒸発量を循環系に戻すことができる。従って、循環系に補給する冷却水量は従来の方法よりも格段に少なくて良い。なお、蒸留残には汚染物が濃縮しており、この蒸発残は系外の廃液処理設備に排出される。
On the other hand, by evaporating the cooling water extracted from the circulation system in the
真空蒸発した蒸発水(蒸気)は凝縮部30に導かれる。この凝縮部30には海水や河川水等の自然水によって蒸気を冷却する熱交換部31が設けられており、蒸気は冷却されて凝縮水になる。この熱交換部31は、例えば、海水等を入れた水槽に多数のパイプを設け、このパイプを蒸気が流れる間に海水によって冷却し凝縮する構造などであれば良い。水槽に導入された海水は熱交換の後に外部に排出される。
The evaporated water (vapor) evaporated in vacuum is guided to the condensing
真空蒸発部20によって蒸発され、凝縮部30を通過して冷却された凝縮水は管路32を通じて循環系40に戻される。一方、真空蒸発部20の熱交換部21を通過した循環系の冷却水の水温は例えば約50℃前後であるので、これを冷却部50に導き、海水等の自然水によって約42℃前後に冷却する。冷却部50の構造は凝縮部30と同様に形成することができる。
The condensed water evaporated by the
なお、真空蒸発部20の熱交換部21を通過した循環系の冷却水は先に述べたように例えば約50℃前後の水温を有するので、この熱量を系外の処理工程の熱源、例えば、別系統の廃液を真空蒸発して濃縮するための加熱源などに利用することができる。
Note that the cooling water in the circulation system that has passed through the heat exchange unit 21 of the
冷却部50を経由して水温を下げた冷却水は循環系40を通じて水砕部10に戻され、溶融スラグを水砕する冷却水として再び使用される。なお冷却水が水砕部10に戻される間に、管路60を通じて新たな水が補給される。具体的には、水砕部10において水砕スラグに付着して系外に搬出された水量と、真空蒸発部20において蒸留残として系外に抜き出された水量の合計量が補給される。先に述べたように、本発明の処理システムでは、真空蒸発によって廃液量が大幅に減量されているので、循環系に補給する冷却水量は従来の方法よりも格段に少なくて良い。
The cooling water whose water temperature has been lowered via the cooling unit 50 is returned to the granulating unit 10 through the circulation system 40 and used again as cooling water for granulating the molten slag. In addition, while cooling water is returned to the water granulating unit 10, new water is supplied through the pipe line 60. Specifically, the total amount of water that has adhered to the granulated slag in the granulating unit 10 and carried out of the system and the amount of water that has been extracted out of the system as a distillation residue in the
本発明の処理方法は、以上のような金属製錬における溶融スラグの水砕用冷却水の他に、溶融炉や製錬炉等の各種炉の水冷ジャケットを循環する冷却水、製鉄の圧延工程の冷却系において循環使用される冷却水、または発電設備の冷却系を循環する冷却水などに広く適用することができる。 The treatment method of the present invention is a cooling process for circulating water cooling jackets of various furnaces such as a melting furnace and a smelting furnace, in addition to the cooling water for granulating molten slag in metal smelting as described above, and a rolling process for iron making. The present invention can be widely applied to cooling water that is circulated and used in the cooling system of this type, or cooling water that circulates in the cooling system of power generation equipment.
〔実施例〕
図1に示す本発明の処理システムの具体的な適用例を示す。
1500t/Hrの冷却水を水砕工程に循環して、約1230℃の溶融スラグ約59t/Hrを水砕する場合、約3t/Hrの水量が水砕スラグに付着して系外に搬出される。この水砕によって水温が上昇した冷却水(水温約55℃)から約10t/Hrの水量を抜き出して真空蒸発部に送る。残量の冷却水は真空蒸発部の熱交換部を通じて循環系を流れる。この水温の高い冷却水によって真空蒸発部は約35mmHgの真空下、約55℃に加熱され、約9t/Hrの冷却水が蒸気になって凝縮部に導かれ、また約1t/Hrの冷却水が蒸発せずに残留し、系外の廃水処理設備に抜き出される。凝縮部には約20℃の海水が導入されており、凝縮部に導入された蒸気はこの海水によって冷却されて凝縮水になり、循環系の冷却水に合流する。一方、真空蒸発部の熱交換部を経た冷却水(約50℃)を冷却部に導入し、約42℃前後に冷却する。この冷却水に管路60を通じて新たに13t/Hrの水を補給し後に水砕部10に供給し、上記水砕工程を繰り返す。
〔Example〕
A specific application example of the processing system of the present invention shown in FIG. 1 will be shown.
When 1500t / Hr of cooling water is circulated in the water granulation process and about 59t / Hr of molten slag of about 1230 ° C, about 3t / Hr of water adheres to the granulated slag and is carried out of the system. The About 10 t / Hr of water is extracted from the cooling water (water temperature of about 55 ° C.) whose water temperature has increased by this water granulation, and sent to the vacuum evaporation section. The remaining amount of cooling water flows through the circulation system through the heat exchange section of the vacuum evaporation section. With this high temperature cooling water, the vacuum evaporation section is heated to about 55 ° C. under a vacuum of about 35 mmHg, about 9 t / Hr of cooling water is converted into vapor and led to the condensation section, and about 1 t / Hr of cooling water. Remains without evaporating and is extracted to a wastewater treatment facility outside the system. Seawater at about 20 ° C. is introduced into the condensing part, and the steam introduced into the condensing part is cooled by this seawater to become condensed water, and merges with the cooling water in the circulation system. On the other hand, cooling water (about 50 ° C.) that has passed through the heat exchange section of the vacuum evaporation section is introduced into the cooling section and cooled to about 42 ° C. The cooling water is newly replenished with 13 t / Hr of water through the pipe line 60 and then supplied to the water granulating unit 10 to repeat the above water granulating step.
10−水砕部、20−真空蒸発部、21−熱交換部、22−管路、23−ガス導入部、24−真空ポンプ、25−管路、30−凝縮部、31−熱交換部、32−管路、40−循環系、50−冷却部、60−補給用管路。 10-water granulation unit, 20-vacuum evaporation unit, 21-heat exchange unit, 22-pipeline, 23-gas introduction unit, 24-vacuum pump, 25-pipeline, 30-condensing unit, 31-heat exchange unit, 32-Pipe line, 40-Circulation system, 50-Cooling part, 60-Supply line.
Claims (7)
In a cooling system that circulates and uses cooling water whose water temperature has risen, a part of the cooling water is extracted from the circulation system and led to the vacuum evaporation section, where it is evaporated using the heat held by the cooling water in the circulation system. A method for treating cooling water, wherein the evaporation residue is discharged outside the system, the steam is cooled and condensed, returned to the circulation system, and reused.
The cooling water according to claim 1, wherein the cooling water is a cooling water for granulating molten slag, a cooling water for a water cooling jacket of a furnace, a cooling water in a steelmaking rolling process, or a cooling water circulating in a cooling system of a power generation facility. Processing method.
When the molten slag is granulated, a part of the cooling water is extracted from the circulation system in the method of cooling the cooling water whose temperature has risen in contact with the molten slag and circulating it again as cooling water for granulation. To the vacuum evaporating section, and then evaporate in vacuum using the heat of the cooling water whose temperature has risen in contact with the molten slag and discharge the evaporation residue outside the system, while cooling and condensing the steam with natural water such as seawater. The cooling water treatment method according to claim 1, wherein the cooling water in the circulation system that has been returned to the circulation system and heat-exchanged in the vacuum evaporation section is cooled and reused by natural water such as seawater.
The method for treating cooling water according to any one of claims 1 to 3, wherein the cooling water is vacuum evaporated after introducing nitrogen gas into the cooling water extracted from the circulation system to drive out dissolved gas from the cooling water. "
The processing method of the cooling water in any one of Claims 1-4 which uses the heat which the cooling water of the circulation system which heat-exchanged in the vacuum evaporation part hold | maintains as a heating source of the waste liquid of another system | strain.
A slag crushed water treatment facility, a circulation system for circulating and using cooling water, a pulverized part that makes molten water contact with molten slag and crushed, a vacuum that draws a part of the cooling water from the circulation system and evaporates it The evaporating unit, the heat exchange unit of the vacuum evaporation unit using the heat of the cooling water whose temperature rises in contact with the molten slag as the heating source, the condensing unit for cooling the vacuum evaporated vapor with natural water such as seawater, A treatment facility for slag crushed water, comprising a conduit for returning to the circulation system, a conduit for discharging the evaporation residue outside the system, and a cooling section for cooling the cooling water of the circulation system with natural water such as seawater.
The processing equipment for slag crushed water according to claim 6, wherein a gas introduction part for introducing nitrogen gas into the cooling water and driving out the dissolved gas is provided in the cooling water introduction part of the vacuum evaporation part.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005115954A JP4389833B2 (en) | 2005-04-13 | 2005-04-13 | Cooling water treatment method and treatment equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005115954A JP4389833B2 (en) | 2005-04-13 | 2005-04-13 | Cooling water treatment method and treatment equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006289303A true JP2006289303A (en) | 2006-10-26 |
JP4389833B2 JP4389833B2 (en) | 2009-12-24 |
Family
ID=37410479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005115954A Expired - Fee Related JP4389833B2 (en) | 2005-04-13 | 2005-04-13 | Cooling water treatment method and treatment equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4389833B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106830142A (en) * | 2017-03-14 | 2017-06-13 | 湖北科林博伦新材料有限公司 | A kind of brine waste concentration technology and device |
CN107721058A (en) * | 2017-10-30 | 2018-02-23 | 郑州格瑞塔电子信息技术有限公司 | A kind of steel mill's sewage-treatment plant with Duplex treatment function |
CN111342157A (en) * | 2020-02-14 | 2020-06-26 | 华富(江苏)电源新技术有限公司 | Lead-acid storage battery container formation cooling water circulation system and control method |
CN112113438A (en) * | 2020-08-19 | 2020-12-22 | 中冶南方都市环保工程技术股份有限公司 | High-temperature slag waste heat recycling system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102557157A (en) * | 2010-12-08 | 2012-07-11 | 无锡华润上华科技有限公司 | Water processing system |
-
2005
- 2005-04-13 JP JP2005115954A patent/JP4389833B2/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106830142A (en) * | 2017-03-14 | 2017-06-13 | 湖北科林博伦新材料有限公司 | A kind of brine waste concentration technology and device |
CN107721058A (en) * | 2017-10-30 | 2018-02-23 | 郑州格瑞塔电子信息技术有限公司 | A kind of steel mill's sewage-treatment plant with Duplex treatment function |
CN111342157A (en) * | 2020-02-14 | 2020-06-26 | 华富(江苏)电源新技术有限公司 | Lead-acid storage battery container formation cooling water circulation system and control method |
CN111342157B (en) * | 2020-02-14 | 2023-10-03 | 华富(江苏)电源新技术有限公司 | Lead-acid storage battery internal formation cooling water circulation system and control method |
CN112113438A (en) * | 2020-08-19 | 2020-12-22 | 中冶南方都市环保工程技术股份有限公司 | High-temperature slag waste heat recycling system |
Also Published As
Publication number | Publication date |
---|---|
JP4389833B2 (en) | 2009-12-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4389833B2 (en) | Cooling water treatment method and treatment equipment | |
CN101260816A (en) | Method and device for reclaiming and utilizing billet residual heat | |
JPH0310919B2 (en) | ||
CN101792830A (en) | Method and device for collecting steam of flushing cinder and afterheat of hot water in iron-making blast furnace | |
US8926727B2 (en) | Apparatus and method for condensing metal vapor | |
JP2009216708A (en) | Method and device for separating and removing neutron absorber from coolant in cooling circuit | |
KR101184656B1 (en) | Condensing boiler with dh water preheating for chp plant | |
KR20110075384A (en) | Method of multi-purpose seawater utilization in industrial usage | |
JP2009227489A (en) | Method for recovering heat energy in slag | |
KR101226709B1 (en) | Evaporator for Treatment of Radioactive Wastewater | |
JP2010155944A (en) | Waste plastic liquefaction device | |
US5330618A (en) | Process for separating dissolved solids from a liquid using an anti-solvent and multiple effect evaporators | |
CN104737236B (en) | Apparatus for replenishing coolant for passive auxiliary feedwater syatem of nuclear power plant | |
JP2000199408A (en) | Power generation method utilizing hot discharged water and power generation facility | |
JP2003117593A (en) | Method for treating organic waste and equipment therefor | |
JP5524909B2 (en) | Power generation system and power generation method | |
JP5518796B2 (en) | Power generation system and power generation method | |
EP1103295A2 (en) | Oil separating apparatus for oil containing substance and method therefor | |
JP2007017035A (en) | System for effectively using energy | |
KR100841489B1 (en) | Process for production of hydrogen and oxygen using waste heat of flue gas of electric arc furnace, and apparatus for the process | |
JP4599139B2 (en) | Steam turbine plant | |
JP4080755B2 (en) | Waste liquid combustion apparatus and combustion method | |
JPH05126315A (en) | Method of water supply and water drainage of deaerator in waste heat recovery boiler and device thereof | |
KR19990026212A (en) | High temperature melt processing systems and methods for flammable and non-combustible radioactive waste | |
JP2003222408A (en) | Combustion device in liquid |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20080321 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20090608 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20090623 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20090820 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20090915 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20090928 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121016 Year of fee payment: 3 |
|
R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121016 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121016 Year of fee payment: 3 |
|
S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121016 Year of fee payment: 3 |
|
R370 | Written measure of declining of transfer procedure |
Free format text: JAPANESE INTERMEDIATE CODE: R370 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131016 Year of fee payment: 4 |
|
LAPS | Cancellation because of no payment of annual fees |