JP2011189293A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger continuously monitoring operating conditions. <P>SOLUTION: A steam supply pipe 3 is connected to a jacket section 2 through a control valve 7. A pressure sensor 11 and a temperature sensor 19 are attached to the jacket section 2. The temperature sensor 12 is attached to a reactor. A suction means 6 is connected to a lower end of the jacket section through a steam trap 4 and a valve 9. The suction means 6 is composed of a liquid ejector 13, a cooling water tank 14, and a circulating pump 15. A temperature sensor 20 and a conductivity sensor 21 are attached to the cooling water tank 14. The system can continuously monitor whether or not the heat exchanger is properly operated by basing on the detected values of each temperature sensor 12, 19, 20 and the pressure sensor 11. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

 In the present invention, the inside of the heat exchange container is depressurized, and the heat exchange object is heated or cooled by the supplied heating or cooling fluid, specifically, heating steam or cooling water. It relates to a heat exchanger.

As a conventional heat exchanger, when the heating device and the suction means are connected by a suction pipe, and when the steam trap and the valve means are attached in parallel to the suction pipe to lower the heating temperature, the valve means is kept for a predetermined time. By opening the valve, the heating temperature can be quickly reduced without time delay.

The conventional heat exchanger has a problem that the operating state of the heat exchanger cannot be continuously monitored, such as whether the heat exchange efficiency equivalent to that in the initial rising stage is continuously exhibited.

JP 2004-16034 A

  The problem to be solved is to obtain a heat exchanger that can continuously monitor the operating state.

 The present invention supplies a heating or cooling fluid to a heat exchange container via a valve and connects a suction means for maintaining the inside of the heat exchange container in a reduced pressure state so that a heat exchange object in the heat exchange container is For heating or cooling, a temperature sensor that detects the temperature state of the heat exchange vessel and a pressure sensor that detects the pressure state are attached to the heat exchange vessel, and heat exchange is performed based on the detected values of the temperature sensor and pressure sensor. Monitoring of whether the container is operating normally is performed.

  The present invention can continuously monitor whether or not the heat exchange container is operating normally by using the detection values of the temperature sensor and the pressure sensor attached to the heat exchange container.

It is a block diagram which shows the Example of the heat exchanger which concerns on this invention.

In the present invention, a temperature sensor and a pressure sensor are attached to a heat exchange container. One or a plurality of such sensors can be appropriately selected according to the size and shape of the heat exchange container.

  In FIG. 1, a heating steam supply pipe 3 connected to a jacket part 2 of a reaction kettle 1 as a heat exchange container, a cooling water supply pipe 5 for cooling connected to the jacket part 2, and a lower part of the jacket part 2. The heat trap is constituted by the steam trap 4 and the suction means 6 communicated with each other.

A control valve 7 for controlling the amount of steam supplied to the jacket portion 2 is attached to the steam supply pipe 3. A nozzle (not shown) is attached to the end portion 25 of the steam supply pipe 3 on the jacket portion 2 side so that the steam is supplied to the outer surface 26 of the reaction kettle 1. The object to be heated in the reaction kettle 1 is heated by the heating steam supplied from the steam supply pipe 3 to the jacket portion 2.

A pressure sensor 11 capable of detecting the pressure in the jacket portion 2 is attached to the upper left portion of the jacket portion 2. A temperature sensor 19 capable of detecting the temperature in the jacket portion 2 is attached to the upper right portion of the jacket portion 2. A temperature sensor 12 capable of detecting the temperature in the reaction kettle 1 is attached to the upper part of the reaction kettle 1.

The cooling water supply pipe 5 is also connected to the upper portion of the jacket portion 2 via a control valve 27. Although not shown, the cooling water supply pipe 5 on the jacket portion 2 side end portion 28 is attached with a nozzle so that the cooling water is supplied to the outer surface 26 of the reaction kettle 1.

It connects with the inlet side of the steam trap 4 by the pipe line 8 from the lower end of the jacket part 2. FIG. An on-off valve 9 is attached in parallel with the steam trap 4. The outlet side of the steam trap 4 and the on-off valve 9 is connected to the suction chamber 10 of the liquid ejector 13 constituting the suction means 6.

The suction means 6 includes a liquid ejector 13, a cooling water tank 14, and a circulation pump 15. By supplying the cooling water in the cooling water tank 14 to the liquid ejector 13 by driving the circulation pump 15, a predetermined suction force is generated in the suction chamber 10.

A cooling water supply pipe 16 is connected to the upper part of the cooling water tank 14, and a pipe on the discharge side of the circulation pump 15 is branched to connect an excess water discharge pipe 17.

  A temperature sensor 20 that can detect the temperature of the cooling water in the tank 14 is attached to the right side surface of the cooling water tank 14, and a conductivity that can detect the conductivity of the cooling water at the bottom of the cooling water tank 14. A rate sensor 21 is attached. Each sensor 11, 12, 19, 20, 21 is electrically connected to a calculation display unit (not shown), and the heat exchanger operates normally on the calculation display unit based on the detection value from each sensor. It is possible to calculate and display whether or not

  When heating an object to be heated (not shown) arranged in the reaction kettle 1, the object to be heated is heated by the steam by supplying a predetermined amount of steam from the steam supply pipe 3 and the control valve 7 to the jacket portion 2. The Condensate condensed by heating passes from the pipe line 8 at the lower end of the jacket portion 2 through the steam trap 4 and further from the liquid ejector 13 to the cooling water tank 14.

  On the other hand, when the object to be cooled in the reaction kettle 1 is cooled, by supplying a predetermined amount of cooling water from the cooling water supply pipe 5 and the control valve 27 to the jacket portion 2, the cooling water is cooled by the heat of the object to be cooled. It evaporates and cools the object to be cooled with the latent heat of evaporation. The vaporized vapor and the remaining cooling water are sucked into the liquid ejector 13 through the steam trap 4 and the on-off valve 9.

  Based on the detection values from the pressure sensor 11 and the temperature sensor 19 of the jacket part 2, for example, whether or not air that should not naturally flow into the jacket part 2 flows in from the relationship between the pressure and temperature of the saturated steam. Is calculated and determined by the calculation display unit, so that the presence or absence of air inflow into the jacket unit 2 can be monitored.

  Similarly, the steam supplied into the jacket part 2 is saturated steam or superheated steam from the detected values from the pressure sensor 11 and the temperature sensor 19 of the jacket part 2 and the relationship between the pressure and temperature of the saturated steam. Is determined. In general, in the case of saturated steam, the pressure and temperature are in a one-to-one relationship and can be heated with high temperature accuracy. However, superheated steam cannot be heated with high temperature accuracy, so mixing of superheated steam is prevented. It must be done.

  Based on the detected values from the temperature sensor 19 of the jacket part 2 and the temperature sensor 12 of the reaction kettle 1, for example, when the temperature in the reaction kettle 1 is significantly lower than the temperature of the jacket part 2, the reaction kettle It is possible to detect that some foreign matter adheres to the surface of 1 and the thermal conductivity is lowered.

  Based on the detected value from the temperature sensor 20 capable of detecting the temperature of the cooling water in the cooling water tank 14 and the temperature sensor 19 of the jacket portion 2, for example, compared with the temperature of the cooling water in the tank 14. When the temperature in the jacket part 2 is significantly high, it is possible to detect that the circulating pump 15 cannot be reliably operated and that sufficient cooling water is not supplied to the jacket part 2.

  The change in the conductivity of the cooling water can be grasped by the detected value from the conductivity sensor 21 of the cooling water tank 14. For example, the cooling water in the tank 14 is made of iron rust, metal, acid, salt ions, etc. When the conductivity has changed due to impurities, it can be detected that the cooling water in the tank 14 has become turbid, and new cooling water can be replenished from the cooling water replenishment pipe 16, or an excess water discharge pipe. The turbid cooling water from 17 can be taken out of the system.

  It can be applied as various heat exchangers that perform indirect heating and cooling alternately.

DESCRIPTION OF SYMBOLS 1 Reaction kettle 2 Jacket part 3 Steam supply pipe 4 Steam trap 5 Cooling water supply pipe 6 Suction means 10 Suction chamber 11 Pressure sensor 12 Temperature sensor 13 Liquid ejector 14 Cooling water tank 15 Circulation pump 19 Temperature sensor 20 Temperature sensor 21 Conductivity sensor

Claims (1)

  A heating or cooling fluid is supplied to the heat exchange container via a valve, and a suction means for maintaining the inside of the heat exchange container in a reduced pressure state is connected to heat or cool the heat exchange object in the heat exchange container. In this case, a temperature sensor for detecting the temperature state of the heat exchange container and a pressure sensor for detecting the pressure state are attached to the heat exchange container, and the heat exchange container is properly operated based on the detected values of the temperature sensor and the pressure sensor. A heat exchanger characterized by monitoring whether or not it is operating.