JP2000356304A - Steam heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a steam heater which does not stagnate condensate generat ed in a steam consuming device. SOLUTION: A steam supply pipe 3 is connected to a jacket 2. A plurality of condensate recovery devices 16, 36 are connected to the lower port of the jacket 2 through a header 25. Condensate generated in the jacket 2 is flowed down to the header 25 and continuously discharged outside of the system by alternate force-feed of the plurality of condensate recovery devices 16, 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for heating an object to be heated housed in a heat exchanger with steam for heating, and more particularly, to a steam suitable for a case where the heating temperature is relatively low at about 100.degree. It relates to a heating device. Specifically, it is used for steam heating of various reaction vessels used for a polymerization reaction or the like, a food distillation apparatus, a concentration apparatus, or a sterilization apparatus. In these cases, the object to be heated often causes thermal damage due to a slight change in temperature, and it is necessary to maintain the heating temperature with high accuracy.

[0002]

2. Description of the Related Art As a conventional steam heating device, for example, a device as disclosed in Japanese Patent Application Laid-Open No. 7-35310 has been used. In this method, a steam pressure space is provided in the heating means so as to be cut off from the outside air, and saturated steam having a pressure lower than the atmospheric pressure is supplied into the steam pressure space while controlling the pressure. Water is discharged to the outside through a pump operated by pressure.
The object to be heated can be heated by relatively low temperature steam of about C degrees.

[0003]

SUMMARY OF THE INVENTION The above-mentioned prior art has the following problems.
In order to intermittently discharge the condensed water collected by a predetermined amount to the outside through the two pumps, the discharge of the condensed water from the heating unit also becomes intermittent, and the condensed water stays in the heating unit due to the operation cycle of the pump. There was a problem. If the condensed water stays in the heating section, the condensed water has an extremely small amount of heat as compared with steam, so that the entire object to be heated is not uniformly heated, resulting in uneven heating.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to make sure that the condensate generated in the heating section of the heat exchanger can be sucked, so that the condensate does not stay. There is no steam heating device to get.

[0005]

In order to solve the above-mentioned problems, the means of the present invention is to form a heating section in a heat exchanger, connect a steam supply pipe for heating, and recover the heat generated by heating. In the case where a condensate recovery device that discharges water from the heating unit is connected, a plurality of condensate recovery devices are arranged, and at least one of the plurality of condensate recovery devices alternately collects condensate from the heating unit. Is performed continuously.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A plurality of condensate recovery devices are arranged, and at least one of them continuously collects condensate from a heating unit alternately, so that the condensate generated in the heating unit stays. Can be eliminated without the need.

[0007]

EXAMPLE In this example, a reactor 1 was used as a heat exchanger.
Here is an example using. A jacket section 2 as a heating section is formed on the outer periphery of the reaction vessel 1 and a steam supply pipe 3 is connected thereto. The on-off valve 4 and the pressure control valve 5 are sequentially connected to the steam supply pipe 3 to communicate with the jacket portion 2.

At the upper part of the jacket part 2, an atmosphere communication pipe 10 is provided.
And the on-off valve 11 are attached. The pipe 12 is connected to the lower part of the jacket portion 2 and connected to the condensate inlets 15 and 35 of the plurality of condensate recovery devices 16 and 36 by the header 25 and the pipes 26 and 27. An on-off valve 13 is attached to the pipe 12, and the pipe 2
A check valve 14 is attached to 6 to allow fluid to pass only from the header 25 to the condensate recovery device 16, and a check valve 24 is similarly attached to the pipe 27.

The condensate outlet 1 of the condensate recovery devices 16 and 36
7 and 37, the recovery pipe 19 through the check valves 18 and 38,
39 is connected. The check valves 18 and 38 are provided in the condensate recovery device 1.
The passage of the fluid from the tubes 6 and 36 to only the recovery pipes 19 and 39 is allowed.

[0010] Pumping fluid inlets 20 and 40 and exhaust ports 21 and 41 are provided above the condensate recovery devices 16 and 36, and the pumping fluid inlets 20 and 40 are connected to the steam supply pipe 3 through a pipe 22.
Connect with Each of the pumping fluid exhaust ports 21 and 41 is open to the atmosphere.

The condensate recovery devices 16 and 36 are the same as those of the prior art. When the condensate flowing in from the condensate inlets 15 and 35 accumulates therein and the water level rises, the float (not shown) is raised to a predetermined position. When the pressure reaches the pressure-supplying fluid inlets 20 and 40, the pressure-feeding valves are opened, and the exhaust valves attached to the exhaust ports 21 and 41 are closed. Is to condense the condensed water supplied and accumulated inside the condensate recovery devices 16 and 36 from the condensate outlets 17 and 37 to the collection destination via the recovery pipes 19 and 39.

At least one of the plurality of condensate recovery devices 16 and 36 alternately has a header 25, that is, a jacket portion 2 by changing the length of the falling pipe from the header 25.
, And the condensate can be continuously collected. In the present embodiment, the condensate first flows down to the condensate recovery device 36 having a long falling pipe, and the condensate is collected by a predetermined amount. The condensate flows down from the header 25 to the other condensate recovery device 16 having a shorter downcomer.

As the condensate in the condensate recovery devices 16 and 36 is pumped, the float (not shown) descends and snaps when it drops to a predetermined liquid level. While closing the pressure feed valve, the exhaust ports 21 and 4
The exhaust valve attached to 1 opens, and condensate flows down from the header 25.

By supplying steam for heating from the steam supply pipe 3 to the jacket portion 2 of the reaction vessel 1, an object to be heated in the reaction vessel 1 is heated. The heating steam temperature is adjusted by adjusting the steam pressure by the pressure control valve 5, so that the pressure and the temperature of the steam, more specifically, the saturated steam, have a one-to-one relationship.
It can be adjusted arbitrarily. The steam deprived of heat by heating condenses and becomes condensed water.

The condensed water generated in the jacket portion 2 flows down to the header 25 and is discharged out of the system via the plurality of condensed water collecting devices 16 and 36 without being accumulated.

[0016]

As described above, according to the present invention, a plurality of condensate recovery devices are arranged, and at least one of the devices continuously performs condensate recovery from the heating unit alternately, so that the heating unit The condensate does not stay, and the object to be heated of the heat exchanger can be heated uniformly without causing uneven heating temperature.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a steam heating device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reactor 2 Jacket part 3 Steam supply pipe 15 Condensate inlet 16 Condensate recovery device 17 Condensate outlet 20 Pumping fluid inlet 21 Exhaust port 25 Header 35 Condensate inlet 36 Condensate recovery device 37 Condensate outlet

Claims (1)

[Claims] 1. A condensate recovery apparatus comprising a heat exchanger, a heating section formed therein, a steam supply pipe for heating connected thereto, and a condensate recovery apparatus for discharging condensate generated by heating from the heating section connected thereto. A steam heating device, wherein a plurality of devices are arranged, and at least one of the plurality of condensate recovery devices continuously performs condensate recovery from the heating unit alternately.