JPH063481U - Volatile cleaning agent recovery device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a volatile cleaning agent recovery device capable of preventing vapor recovery into the atmosphere and recovering it. [Composition] A condenser is connected to an upper part of a cleaning tank in which a volatile cleaning agent is used via an exhaust pipe, a recovery pipe is arranged in a connected state between a lower part of the condenser and the cleaning tank, and The condenser is composed of an inner cylinder connected to the exhaust pipe and the recovery pipe, an outer cylinder arranged outside the inner cylinder, and an annular hollow portion formed between the inner and outer cylinders and allowing cooling water to pass therethrough. And

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a volatile cleaner device for recovering volatile cleaners such as 1,1,1-trichloroethane and difluorochloromethane.

[0002]

[Prior art]

 Volatile detergents such as 1,1,1-trichloroethane and difluorochloromethane, which are widely used in the field of the chemical industry, have been conventionally used in an open system, and the vapor thereof has been diffused into the atmosphere.

[0003]

[Problems to be solved by the device]

 However, the above-mentioned 1,1,1-trichloroethane and difluorochloromethane are decomposed when the vapor is released into the atmosphere to generate halogen gas, which may be a destructive substance in the ozone layer. Is being watched. Therefore, in recent years, it has been strongly recognized that it is necessary to prevent the abolition of these volatile cleaning agents or prevent the emission of vapor into the atmosphere.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a volatile cleaning agent recovery device capable of preventing vapor recovery into the atmosphere and recovering it. .

[0005]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention provides a cleaning tank in which a volatile cleaning agent is used, and a condenser connected to an upper part of the cleaning tank via an exhaust pipe to condense and liquefy the vapor of the volatile cleaning agent. A condenser pipe connected between the lower part of the condenser and the cleaning tank to collect the volatile cleaning agent in the cleaning tank, and the condenser is connected to the exhaust pipe and the recovery pipe. The inner cylinder, the outer cylinder arranged outside the inner cylinder, and the annular hollow portion formed between the inner and outer cylinders and through which cooling water passes are adopted.

[0006]

[Action]

 According to the present invention, the vapor of the volatile cleaning agent floating in the cleaning tank is admitted from the upper part of the cleaning tank into the inner cylinder of the condenser through the exhaust pipe. In the condenser, since the cooling water is passed through the annular hollow portion, the vapor of the volatile cleaning agent is cooled and condensed and liquefied by the cooling water. The liquefied volatile cleaning agent is recovered in the cleaning tank through a recovery pipe.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to FIG. FIG. 1 shows an example of a recovery device for recovering this by using 1,1,1-trichloroethane as a volatile cleaning agent. In FIG. 1, reference numeral 1 is a cleaning tank, 2 is an exhaust pipe, 3 is a condenser, and 4 is a recovery pipe.

The cleaning tank 1 is a tank in which 1,1,1-trichloroethane is used. A water cooling pipe 5 is arranged in a substantially spiral shape along the inner wall near the ceiling inside the cleaning tank 1. Below the water cooling pipe 5, there is provided a liquid receiver 6 for receiving 1,1,1-trichloroethane which is liquefied and dropped by the water cooling pipe 5.

The exhaust pipe 2 is provided so as to be connected to the upper part of the cleaning tank 1, and collects and exhausts the vapor of 1,1,1-trichloroethane floating in the cleaning tank 1.

The condenser 3 is a liquefaction tower for condensing and liquefying 1,1,1-trichloroethane vapor, and includes a cylindrical inner cylinder 3 a which is erected with its axis oriented vertically, and An outer cylinder 3b arranged outside the cylinder 3a and an annular hollow portion 3c formed between the inner and outer cylinders 3a and 3b are provided. The exhaust pipe 2 extending from the cleaning tank 1 is connected to the inner side of the inner cylinder 3a. The outer cylinder 3b is fixed to the fixed wall 8 and the like by the support members 7, 7 at several points. A water supply port 3d for supplying cooling water into the annular hollow portion 3c is provided near the lower portion of the annular hollow portion 3c, and a drain port 3e for draining the cooling water within the annular hollow portion 3c is provided near the upper portion. Thus, the cooling water is passed through the annular hollow portion 3c in an upward flow. At the lower end of the inner cylinder 3a, there is provided a downflow port 3f through which condensed and liquefied 1,1,1-trichloroethane flows down, and a cock 3g for controlling opening / closing of the downflow port 3f. A depressurization valve 9 is provided above the aggregator 3.

The recovery pipe 4 is connected between the downflow port 3f below the condenser 3 and the cleaning tank 1, and collects liquefied 1,1,1-trichloroethane into the cleaning tank 1. is there.

A separator 10 for separating 1,1,1-trichloroethane from impurities such as water and recovering only 1,1,1-trichloroethane is provided in the recovery pipe 4. As the separator 10, an existing separator of the type that uses the difference in specific gravity is used. By the way, the specific gravity of 1,1,1-trichloroethane is 1.47. Further, the separator 10 is connected with an introduction pipe 11 for introducing 1,1,1-trichloroethane accumulated in the liquid receiver 6 in the cleaning tank 1 into the separator 10.

Next, the operation of the trichloroethane recovery apparatus of this embodiment will be described. A part of the vapor of 1,1,1-trichloroethane floating in the cleaning tank 1 is cooled and liquefied by the water cooling pipe 5 near the ceiling, and is stored in the receiver 6 and then passed through the introduction pipe 11. It is introduced into the separator 10. The rest of the 1,1,1-trichloroethane vapor is admitted into the inner cylinder 3a of the condenser 3 from the upper part of the cleaning tank 1 through the exhaust pipe 2. In the condenser 3, since the cooling water is passed upward in the annular hollow portion 3c, this steam is cooled by the cooling water through the inner cylinder 3a and condensed and liquefied. The liquefied 1,1,1-trichloroethane is admitted to the separator 10 through the recovery pipe 4. In the separator 10, it merges with 1,1,1-trichloroethane previously introduced from the liquid receiver 6 in the cleaning tank 1, and is separated from impurities such as water there. Thereafter, only 1,1,1-trichloroethane is recovered in the cleaning tank 1 through the recovery pipe 4.

In this way, the vapor of 1,1,1,1-trichloroethane is liquefied and recovered, so that it is possible to prevent its emission into the atmosphere. Therefore, it is possible to prevent ozone layer depletion due to chlorine gas generated by the decomposition of this vapor, as well as avoid air pollution and adverse effects on the human body, and contribute to the environmental protection that has been screaming in recent years. can do.

Further, since 1,1,1-trichloroethane can be recovered and reused, it is economically advantageous.

In the above-mentioned embodiment, an example in which the volatile cleaning agent recovery device is applied to the recovery of 1,1,1-trichloroethane is shown. However, when vapor is diffused into the atmosphere, ozone layer is destroyed or the atmosphere is depleted. It is also effective for recovering other volatile cleaning agents as long as it causes troubles such as contamination and adverse effects on the human body.

[0017]

[Effect of device]

 As described above, according to the volatile cleaning agent recovery device of the present invention, it is possible to prevent the vapor from being emitted into the atmosphere, so that problems such as ozone layer depletion, air pollution, and adverse effects on the human body can be prevented. It can prevent and contribute to environmental protection.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a volatile cleaning agent recovery device according to the present invention.

[Explanation of symbols]

 1 Cleaning Tank 2 Exhaust Pipe 3 Condenser 3a Inner Cylinder 3b Outer Cylinder 3c Annular Hollow Part 3d Water Supply Port 3e Drainage Port 3f Downflow Port 3g Cock 4 Recovery Pipe 5 Water Cooling Pipe 6 Liquid Receiver 7 Supporting Member 8 Fixed Wall 9 Pressure Release Valve 10 Separation pipe 11 Introduction pipe

Claims (1)

[Scope of utility model registration request] 1. A cleaning tank in which a volatile cleaning agent is used, a condenser connected to an upper portion of the cleaning tank via an exhaust pipe to condense and liquefy the vapor of the volatile cleaning agent, and a lower portion of the condenser. A condenser connected to the cleaning tank to collect the volatile cleaning agent in the cleaning tank; and the condenser includes an inner cylinder connected to the exhaust pipe and the recovery pipe, and A volatile cleaning agent recovery device comprising an outer cylinder arranged outside the cylinder, and an annular hollow portion formed between the inner and outer cylinders and allowing cooling water to flow therethrough.