JPS60187800A - Vacuum device - Google Patents

Abstract

PURPOSE:To permit to save energy and produce high vacuum by a method wherein first stage air injection type ejector, sucking incompressible gas, and second stage water injection type ejector, sucking the incompressible gas sucked and compressed by the first stage ejector, are provided in the device. CONSTITUTION:Material liquid 2 is introduced by a pump 3 into a vacuum type deaerator 1 through a conduit 4, dispersed from a spray nozzle 5, a part of it is flash-vaporized and the balance is deaerated through filling material 6 to stay in the deaerator. Next, the incompressible gas in the vacuum type deaerator 1 is induced into the vacuum suction chamber (not shown in the diagram) of the first stage air injection type ejector 10 through the conduit 11. The incompressible gas, induced and compressed in the ejector 10, is introduced into the vacuum suction chamber (not shown in the diagram) of the second water injection type ejector 17, the second ejector 17 induces and compresses the incompressible gas and drive air by pressurized water, the gas is introduced into a separating tube 19, gaseous body is released into atmosphere, separated water is stored in a separating tank 14 and thus the production of high vacuum defree may be effected.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vacuum device used as a vacuum distillation device or the like.

Configuration of conventional example and its problems Conventional vacuum equipment is a water injection type that sucks non-condensable gas from a vacuum deaerator that deaerates raw material liquid into the liquid circulation line of a non-condensable gas separation tank. Although it is configured with a separate ejector, a vacuum device with this configuration still has problems such as not being able to obtain a high vacuum and requiring the use of a large all-round supply water pump. was there.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a vacuum device that solves the above-mentioned conventional problems.

Structure of the Invention In order to achieve the above objects, the vacuum device of the present invention includes a first stage air injection ejector that sucks non-condensable gas from a vacuum deaerator that deaerates a raw material liquid; Installed in the liquid circulation line of the separation tank.

The second stage water injection type ejector sucks the non-condensable gas suctioned and compressed by the first stage air injection type ejector, thereby making it possible to use the water injection type ejector alone. In addition to being able to obtain a higher vacuum than the previously used vacuum device, a general-purpose water supply pump can also be small6.

Examples and effects An embodiment of the present invention will be described below with reference to the drawings.

In the figure, (1) is a vacuum deaerator that deaerates the raw material liquid (2), and the raw material liquid (2) is passed through a conduit (4) equipped with a pump (3) to a spray nozzle in the upper part of the vessel. The structure is such that the spray is distributed from (5). (6) is a vacuum deaerator (
The filling material provided in the middle part of the upper F direction of the container in 1), A7)
is the degassed fluid (8) collected at the bottom of the vacuum deaerator (1).
) to the outside of the system (special pipe; (9) is a pump installed in the middle of conduit (7).

Of3 l, the first stage air injection ejector sucks non-condensable gas from the vacuum deaerator (1) through the conduit aυ.
Driving air is supplied from the surrounding atmosphere through the regulating valve and the conduit u1, and serves to suck and compress non-condensable gas from the vacuum deaerator (1).

Ql is a non-condensable gas separation tank that also serves as a water tank, and is connected to the first stage air injection ejector -〇〇 through a conduit q in the middle of the conduit s'as that constitutes the liquid circulation line. A second stage water injection ejector 〇η is provided. Note that the first and second stage ejectors 0 (1 (Lη) are of a general configuration, and each is configured with a nozzle, a throat, a vacuum suction chamber, a diffuser, etc. QlG is a conduit This is a pump located upstream of the second stage water injection ejector αη in the middle of the OG. , the conduit control is connected. (4) is a lure that swings following the liquid level. 4d lever, 3
υ is a regulating valve that detects the liquid level through this lever with a float (A) and opens and closes to keep the liquid level constant.These levers with a float (E) and the regulating valve? υ constitutes a liquid level adjustment valve device. (Foundation) is a conduit in which the above-mentioned regulating valve type E is interposed, and (E) is a non-condensable gas separation tank a.
A vent pipe installed at the upper end of the tank 4 serves to release the gas separated in the tank into the atmosphere.

The effects of the above configuration will be explained below.

First, the raw material liquid (2) is introduced into the vacuum deaerator (υ) through the pump (30) and the conduit (4), and is sprayed from the spray nozzle (5). After flash evaporation, the remainder is degassed through the filler (6) and collected at the bottom of the vessel.The degassed fluid (8) is guided by the pump (9) through the conduit (7) to the appropriate location for use. Next, one non-condensable gas from the vacuum deaerator (1) is passed through a special pipe 9υ to the vacuum suction chamber (not shown) of the first stage air injection ejector (1 (I)). is attracted to.

At this time, driving air is introduced into the first stage air injection ejector QO from outside the system while being regulated by the regulating valve 4. That is, the vacuum deaerator (
1) The degree of vacuum is adjusted. Then, the non-condensable gas suctioned and compressed by the first stage air injection ejector 0 (cutter) is led to the vacuum suction chamber (not shown) of the second stage water injection ejector α through the conduit 01. It will be destroyed.

On the other hand, water in the non-condensable gas separation tank 0, which also serves as a water tank, is passed through a conduit 00, pressurized by a pump (g), and guided to the second stage water injection type ejector α force. Then, the second stage water injection ejector Qη uses this pressurized water to inject the first stage air □
The non-condensable gas and drive air from the injection ejector Q0 are sucked and compressed, and passed through the conduit EltJ to the separation tube α.
Lead to 1. The gas separated in the separation tube 0e is released into the atmosphere through a belt pipe (e).

The separated water is collected at the bottom of the portion a4V1 (141).

In addition.

When the non-condensable gas from the vacuum deaerator (1) contains a lot of moisture, the liquid level in the 1-separation 4PJo rises and the 1-separation tank 044
When a large amount of water is released from the vent meter due to the water temperature in 173 being high, the liquid level in the 1st separation tank o4 gradually decreases. In this case, the liquid level adjustment valve device (a)? 1) minute 1
The water in the 1E tank can be discharged through the conduit (A) or replenished from the outside through the conduit (A).

Effects of the Invention According to the present invention, a higher vacuum can be obtained than in a vacuum device using a water injection ejector alone, and the general-purpose water supply pump can also be small, and energy consumption can be reduced. be able to.

[Brief explanation of the drawing]

The drawing is a flow sheet showing one embodiment of the present invention. (υ...Vacuum deaerator, (2)...Raw material liquid, 01
...First stage air injection ejector, Ql...Non-condensable gas separation tank. σ...Second stage water injection ejector Representative Yoshihiro Morimoto

Claims (1)

[Claims] 1. A first stage air injection ejector that sucks non-condensable gas from a vacuum deaerator that deaerates the raw material liquid, and a first stage air injection ejector that is installed in the liquid circulation line of the non-condensable gas separation tank; 1. A vacuum device comprising a second stage water injection ejector that sucks non-condensable gas suctioned and compressed by an air injection ejector.