JP2007051803A - Steam temperature reducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steam temperature reducing device causing no temperature unevenness in temperature-reduced steam by mixing high temperature steam and a cooling fluid wholly and uniformly. <P>SOLUTION: A heat exchange part 3 and a cooling fluid supply part 2 are sequentially connected to a high temperature steam supply pipe 1. A cooling fluid pipe 6 is connected to the cooling fluid supply part 2. A heat exchange chamber 7 of the heat exchange part 3 is connected to the cooling fluid supply part 2. The cooling fluid supply part 2 is connected to a mixing accelerating passage 13, a gas-liquid separator 8 and a temperature-reduced steam supply pipe 9 in this order. A heat exchange coil 10 in the heat exchange chamber 7 communicates with a circulating pump 11 through a passage 12. The high temperature steam supplied from the high temperature steam supply pipe 1 is mixed with the cooling fluid raised in temperature in the cooling fluid supply part 2, and reduced to a predetermined temperature without temperature unevenness. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、高温状態の蒸気を、所定の温度例えば飽和蒸気温度まで減温することのできる蒸気減温装置に関する。   The present invention relates to a steam temperature reducing apparatus capable of reducing the temperature of steam in a high temperature state to a predetermined temperature, for example, a saturated steam temperature.

蒸気減温装置は、過熱状態の高温蒸気に、冷却水等の冷却流体を供給して所定の温度まで蒸気を減温させるものである。   The steam temperature reducing device supplies a cooling fluid such as cooling water to overheated high temperature steam to reduce the temperature of the steam to a predetermined temperature.

この蒸気減温装置においては、加熱容器の二次側のドレンすなわち液体を冷却流体として、高温蒸気と接触させて蒸気の温度を減温するために、蒸気の全体が均一に減温されずに、減温蒸気に温度ムラを生じてしまう問題点があった。すなわち、高温蒸気にノズル等を介して冷却水を供給しても、蒸気と水滴が全体に且つ均一に混合されずに温度ムラを生じるのである。
特公平７−８８９３３号公報 In this steam temperature reducing device, since the drain on the secondary side of the heating container, that is, the liquid, is used as a cooling fluid and brought into contact with high-temperature steam to reduce the temperature of the steam, the entire steam is not uniformly cooled. There is a problem that temperature unevenness occurs in the reduced temperature steam. That is, even if the cooling water is supplied to the high-temperature steam through a nozzle or the like, the steam and water droplets are not mixed uniformly and entirely, resulting in temperature unevenness.
Japanese Patent Publication No. 7-88933

解決しようとする課題は、高温蒸気と冷却流体が全体に且つ均一に混合されて、減温蒸気に温度ムラを生じることのない蒸気減温装置を提供することである。   The problem to be solved is to provide a steam temperature reducing device in which the high temperature steam and the cooling fluid are uniformly and uniformly mixed so as not to cause temperature unevenness in the temperature reduced steam.

本発明は、高温蒸気中へ冷却流体を供給して、当該高温蒸気を所定温度状態の蒸気まで減温するものにおいて、蒸気と冷却流体が熱交換する熱交換部を配置して、当該熱交換部で熱交換された冷却流体を高温蒸気中へ供給する冷却流体供給部を設けると共に、当該冷却流体供給部を熱交換部の出口側に配置したものである。   The present invention supplies a cooling fluid into high-temperature steam and reduces the temperature of the high-temperature steam to a steam in a predetermined temperature state. A cooling fluid supply unit that supplies the cooling fluid heat-exchanged in the unit into the high-temperature steam is provided, and the cooling fluid supply unit is disposed on the outlet side of the heat exchange unit.

本発明の蒸気減温装置は、蒸気と冷却流体を熱交換部で熱交換した後に、すなわち、熱交換によって温度上昇した冷却流体を、冷却流体供給部から減温すべき蒸気中に供給することにより、温度上昇した冷却流体が蒸気中ですみやかに蒸発気化して蒸気と混合されることによって、高温蒸気と冷却流体の混合は促進され、高温蒸気を温度ムラなく減温することができる。   The steam temperature reducing device of the present invention supplies the cooling fluid whose temperature has been increased by heat exchange between the steam and the cooling fluid in the heat exchange section, that is, the steam to be cooled from the cooling fluid supply section. Thus, the cooling fluid whose temperature has risen is quickly evaporated and mixed in the steam and mixed with the steam, so that the mixing of the high-temperature steam and the cooling fluid is promoted, and the temperature of the high-temperature steam can be reduced without temperature unevenness.

本発明は、冷却流体供給部から減温すべき蒸気中へ供給する冷却流体を、予め所定温度まで熱交換部で熱交換して温度上昇させた後、減温すべき蒸気中へ供給するものであり、熱交換部での冷却流体と蒸気との熱交換は、間接的に蒸気と冷却流体が熱交換するものが好ましい。   In the present invention, the cooling fluid supplied from the cooling fluid supply unit to the steam to be reduced in temperature is heated in advance in the heat exchange unit to a predetermined temperature and then the temperature is increased, and then supplied to the steam to be reduced in temperature. The heat exchange between the cooling fluid and the steam in the heat exchange section is preferably such that the steam and the cooling fluid indirectly exchange heat.

図１は、本発明の１実施例の構成図であって、過熱状態の高温蒸気が流下する高温蒸気供給管１と、冷却流体供給部２と、熱交換部３、及び、冷却流体タンク４とで蒸気減温装置を構成する。   FIG. 1 is a configuration diagram of an embodiment of the present invention, in which a high-temperature steam supply pipe 1 through which a superheated high-temperature steam flows, a cooling fluid supply unit 2, a heat exchange unit 3, and a cooling fluid tank 4 are shown. And constitute a steam temperature reducing device.

冷却流体供給部２は、逆Ｔ字状の冷却流体供給管路５で構成し、冷却流体供給管路５の入口側を熱交換部３と接続し、出口側に減温蒸気供給管９を接続すると共に、冷却流体供給管路５の上端に、熱交換部３と連通した冷却流体管６を接続する。図示はしないが、冷却流体管６から冷却流体供給管路５へと連通する間に、冷却流体を噴霧するスプレーノズルを取り付ける。   The cooling fluid supply unit 2 is configured by an inverted T-shaped cooling fluid supply pipe 5, the inlet side of the cooling fluid supply pipe 5 is connected to the heat exchange unit 3, and the dehumidified steam supply pipe 9 is connected to the outlet side. At the same time, a cooling fluid pipe 6 communicating with the heat exchanging unit 3 is connected to the upper end of the cooling fluid supply pipe 5. Although not shown, a spray nozzle for spraying the cooling fluid is attached while the cooling fluid pipe 6 communicates with the cooling fluid supply pipe 5.

熱交換部３は、高温蒸気供給管１と接続した熱交換室７と、この熱交換室７内にコイル状に配置した冷却流体管６の熱交換コイル部１０で構成する。一方、冷却流体供給部２の下流側には、高温蒸気と冷却流体の混合を促進する混合促進通路１３を接続する。この混合促進通路１３内を冷却流体の混合された蒸気が通過して、気液分離器８と減温蒸気供給管９を通って、所定温度まで減温された蒸気が、蒸気使用箇所へと供給されるものである。   The heat exchanging unit 3 includes a heat exchanging chamber 7 connected to the high temperature steam supply pipe 1 and a heat exchanging coil unit 10 of a cooling fluid pipe 6 disposed in a coil shape in the heat exchanging chamber 7. On the other hand, on the downstream side of the cooling fluid supply unit 2, a mixing promotion passage 13 that promotes mixing of the high-temperature steam and the cooling fluid is connected. The steam mixed with the cooling fluid passes through the mixing promotion passage 13, passes through the gas-liquid separator 8 and the temperature-reduced steam supply pipe 9, and the steam whose temperature has been reduced to a predetermined temperature is passed to the steam use location. To be supplied.

冷却流体タンク４の冷却流体が、循環ポンプ１１と通路１２を通って熱交換コイル部１０を流下する間に、蒸気と熱交換されて所定温度まで温度上昇する。温度上昇した冷却流体は、冷却流体管６から冷却流体供給部２へ供給される。   While the cooling fluid in the cooling fluid tank 4 flows down the heat exchange coil section 10 through the circulation pump 11 and the passage 12, the heat is exchanged with steam and the temperature rises to a predetermined temperature. The cooling fluid whose temperature has risen is supplied from the cooling fluid pipe 6 to the cooling fluid supply unit 2.

冷却流体タンク４の上面には、冷却流体を補給する冷却流体補給管１５を接続する。また、冷却流体タンク４の下部側面には、残余の冷却流体を排出する冷却流体排出管１６を接続する。   A cooling fluid supply pipe 15 for supplying cooling fluid is connected to the upper surface of the cooling fluid tank 4. A cooling fluid discharge pipe 16 that discharges the remaining cooling fluid is connected to the lower side surface of the cooling fluid tank 4.

混合促進通路１３の出口側の減温蒸気供給管９には、蒸気中の液滴と蒸気を分離する気液分離器８を取り付ける。気液分離器８の出口側の減温蒸気供給管９には、液滴の分離された蒸気だけが流下する。一方、気液分離器８で蒸気から分離された液体は、排出管１７を通って冷却流体タンク４に至る。なお、減温蒸気供給管９には、流下する減温蒸気の温度を検出するための温度センサ１８を取り付ける。 A gas-liquid separator 8 for separating the droplets in the steam and the steam is attached to the temperature-reduced steam supply pipe 9 on the outlet side of the mixing promotion passage 13. Only the vapor from which the droplets have been separated flows down to the temperature-reduced steam supply pipe 9 on the outlet side of the gas-liquid separator 8. On the other hand, the liquid separated from the vapor by the gas-liquid separator 8 reaches the cooling fluid tank 4 through the discharge pipe 17. The temperature-reducing steam supply pipe 9 is provided with a temperature sensor 18 for detecting the temperature of the temperature-reducing steam flowing down.

高温蒸気供給管１を左側から右側へ向かって流下する高温蒸気は、冷却流体供給部２から供給される冷却流体と混合されて、所定温度まで減温される。なお、冷却流体供給管路５で供給される冷却流体の量は、バルブ２０または２１の弁開度を調節することによって適宜制御することができる。   The high temperature steam that flows down from the left side to the right side through the high temperature steam supply pipe 1 is mixed with the cooling fluid supplied from the cooling fluid supply unit 2 and reduced in temperature to a predetermined temperature. Note that the amount of the cooling fluid supplied through the cooling fluid supply pipe 5 can be appropriately controlled by adjusting the valve opening degree of the valve 20 or 21.

冷却流体供給管路５で供給される冷却流体の温度は、熱交換部３の熱交換室７を流下する蒸気によって昇温される。従って、冷却流体タンク４と循環ポンプ１１と冷却流体管６を経て、冷却流体供給管路５から過熱蒸気中へ供給される冷却流体は、直ちに蒸発気化して過熱蒸気の全体に行き渡り、過熱蒸気を所定の温度まで温度ムラなく減温することができる。 The temperature of the cooling fluid supplied through the cooling fluid supply pipe 5 is raised by the steam flowing down through the heat exchange chamber 7 of the heat exchange unit 3. Accordingly, the cooling fluid supplied from the cooling fluid supply line 5 into the superheated steam through the cooling fluid tank 4, the circulation pump 11, and the cooling fluid pipe 6 is immediately evaporated and spread over the whole superheated steam. Can be reduced to a predetermined temperature without temperature unevenness.

冷却流体供給部２で供給された冷却流体の残余の液滴は、気液分離器８で蒸気と分離され、排出管１７から冷却流体タンク４へ至る。液体が分離され、且つ、所定の温度まで減温された蒸気は、減温蒸気供給管９から図示しない蒸気使用箇所へと供給される。 The remaining droplets of the cooling fluid supplied by the cooling fluid supply unit 2 are separated from the vapor by the gas-liquid separator 8 and reach the cooling fluid tank 4 from the discharge pipe 17. The vapor from which the liquid has been separated and the temperature has been reduced to a predetermined temperature is supplied from the temperature-reduced vapor supply pipe 9 to a vapor use location (not shown).

本発明の蒸気減温装置の実施例を示す構成図。The block diagram which shows the Example of the steam temperature decreasing apparatus of this invention.

符号の説明Explanation of symbols

１ 高温蒸気供給管
２ 冷却流体供給部
３ 熱交換部
４ 冷却流体タンク
５ 冷却流体供給管路
６ 冷却流体管
７ 熱交換室
８ 気液分離器
９ 減温蒸気供給管
１０ 熱交換コイル部
１１ 循環ポンプ
１２ 通路
１８ 温度センサ
DESCRIPTION OF SYMBOLS 1 High temperature steam supply pipe 2 Cooling fluid supply part 3 Heat exchange part 4 Cooling fluid tank 5 Cooling fluid supply line 6 Cooling fluid pipe 7 Heat exchange chamber 8 Gas-liquid separator 9 Temperature reduction steam supply pipe 10 Heat exchange coil part 11 Circulation Pump 12 Passage 18 Temperature sensor

Claims (1)

高温蒸気中へ冷却流体を供給して、当該高温蒸気を所定温度状態の蒸気まで減温するものにおいて、蒸気と冷却流体が熱交換する熱交換部を配置して、当該熱交換部で熱交換された冷却流体を高温蒸気中へ供給する冷却流体供給部を設けると共に、当該冷却流体供給部を熱交換部の出口側に配置したことを特徴とする蒸気減温装置。
A cooling fluid is supplied into the high-temperature steam to reduce the temperature of the high-temperature steam to a predetermined temperature state steam, and a heat exchanging part for exchanging heat between the steam and the cooling fluid is arranged and heat exchange is performed in the heat exchanging part. A steam temperature reducing device is provided, wherein a cooling fluid supply unit for supplying the cooled cooling fluid into the high-temperature steam is provided, and the cooling fluid supply unit is disposed on the outlet side of the heat exchange unit.

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