CN212214675U - Organic solvent dehydration device and organic solvent dehydration system - Google Patents

Abstract

An object of the present invention is to provide an organic solvent dehydration device and an organic solvent dehydration system that can remove moisture contained in an organic solvent with a cost lower than that of the prior art, with high efficiency and stability. The solving means is as follows: the organic solvent dehydration device of the utility model is characterized in that the device is provided with a dehydration tank filled with a dehydrating agent; a dehydrating unit for passing the organic solvent to be treated containing water to the dehydrating tank and dehydrating the water by allowing the dehydrating agent to absorb water; a drying section for drying the moisture absorbed by the dehydrating agent by passing a drying gas to the dehydrating tank; the dehydration and the drying are alternately performed.

Description

Organic solvent dehydration device and organic solvent dehydration system

Technical Field

The present invention relates to a device for removing water from an organic solvent, and more particularly to a device for removing water from an organic solvent, which is used for removing water from an organic solvent-containing gas generated by various factories, research facilities, etc. by using an organic solvent recovery device, and to a technical field of an organic solvent removal system.

Background

As a method for removing moisture from an organic solvent using a dehydrating agent, for example, there is a method for synthesizing zeolite using a porous material disclosed in patent document 1.

[ Prior art documents ]

[ patent document ]

[ patent document 1 ] Japanese patent laid-open publication No. 2000-225316 "

SUMMERY OF THE UTILITY MODEL

[ problem to be solved by the utility model ]

However, the conventional method requires a large amount of dehydrating agents, which is a cost concern, and requires manpower for replacing the dehydrating agents.

Therefore, the present invention provides an organic solvent dehydration apparatus and an organic solvent dehydration system, which can realize continuous dehydration of an organic solvent, basically remove water contained in the organic solvent to be treated efficiently and stably without replacing the dehydrating agent.

[ MEANS FOR SOLVING THE PROBLEMS ] to solve the problems

The utility model is composed as follows.

1. An organic solvent dehydration device is characterized by comprising: a dehydrating tank filled with a dehydrating agent,

and a dehydrating unit for passing the organic solvent to be treated containing water to the dehydrating tank and dehydrating the organic solvent by allowing the dehydrating agent to absorb the water,

and a drying section for drying the moisture absorbed by the dehydrating agent by circulating a drying gas to the dehydrating tank;

the dehydration and the drying are alternately performed.

2. An organic solvent dehydration system characterized in that the organic solvent dehydration apparatus according to the above 1 is connected to a steam desorption type solvent recovery apparatus or an inert gas circulation desorption type solvent recovery apparatus.

[ Utility model effect ]

The utility model discloses an organic solvent dewatering device and organic solvent dewatering system have realized organic solvent's continuous purification, need not basically change the dehydrating agent, can detach the moisture that organic solvent contains high-efficiently steadily. This has the effect of reducing the labor and cost for replacement.

Drawings

Fig. 1 is a view showing an organic solvent dehydration apparatus having 1 dehydration tank according to an embodiment of the present invention.

Fig. 2 shows an organic solvent dehydration apparatus having 2 dehydration tanks according to another embodiment of the present invention.

Fig. 3 shows a configuration of an organic solvent desorption system having a vapor desorption type organic solvent recovery device at the front.

Fig. 4 shows a structure of an organic solvent desorption system having an inert gas circulation desorption type organic solvent recovery device at the front.

Reference numerals

100: organic solvent dehydration device (1 groove type)

110: organic solvent tank to be treated

120: dewatering tank

121: dehydrating agent

130: organic solvent box after dehydration treatment

140: water tank

150: water pump

160: air blower

L101 to L108: piping

V101 to V108: valve with a valve body

200: organic solvent dehydration device (2 groove type)

210: organic solvent tank to be treated

220,230: dewatering tank

221,231: dehydrating agent

240: organic solvent box after dehydration treatment

250: water tank

260: water pump

270: air blower

L201 to L213: piping

V201 to V212: valve with a valve body

30: organic solvent dehydration system

300: steam desorption type solvent recovery device

310: raw material gas blower

320,330: adsorption tank

321,331: adsorption element

340: condenser

350: separator

L301 to L308: piping

D301 to D304: air valve

V301, V302: valve with a valve body

40: organic solvent dehydration system

400: inactive gas circulation desorption type solvent recovery device

410: raw material gas blower

420,430 raw gas adsorption tank

421,431,441 adsorption element

440: circulation desorption groove

450: circulating blower

460: no. 1 Heater

470: cooling device

480: condenser

490: recycling bin

500: no. 2 heater

L401 to L409: piping

V401 to V411: valve with a valve body

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the embodiments described below, the same or corresponding portions are denoted by the same reference numerals in the drawings, and the description thereof will not be repeated. In the following description, when there are a plurality of embodiments, it is originally intended to appropriately combine the features of the respective embodiments unless otherwise specified.

(embodiment mode 1)

Fig. 1 is a block diagram of an organic solvent dehydration apparatus 100 according to embodiment 1. The organic solvent dehydration apparatus 100 is an apparatus for dehydrating water contained in the organic solvent to be treated and discharging the purified organic solvent. The organic solvent dehydration apparatus 100 includes a treated organic solvent tank 110, a dehydration tank 120 filled with a dehydrating agent 121, a dehydrated organic solvent tank 130, a water tank 140, a water pump 150, a blower 160, pipes L101 to L108, and valves V101 to V107 for switching flow paths.

Next, the processing steps of the organic solvent dehydration apparatus 100 will be described. In the organic solvent dehydration apparatus 100, the valves provided in the piping are opened and closed, and the dehydration step of the organic solvent to be treated and the drying step of the dehydrating agent are continuously repeated.

[ dehydration step ]

In the dehydration step, the following processes are performed. When valves V101 and V102 are opened, the organic solvent to be treated containing moisture stored in the organic solvent tank 110 is sent to the dehydration tank 120 through the piping L101. The dehydrating tank 120 is filled with a dehydrating agent 121, and the organic solvent to be treated containing moisture is brought into contact with the dehydrating agent 121, whereby the moisture is absorbed and dehydration is performed. The dehydrated organic solvent is sent to the post-dehydration organic solvent tank 130 through the pipe L102. Therefore, the valves V101 and V102, the pipes L101 and L102, and the dewatering unit function as a dewatering unit for passing the organic solvent containing water to be treated to the dewatering tank 120 and dewatering the organic solvent by absorbing the water in the dewatering agent 121.

[ cleaning Process ]

In the cleaning step, the following processes are performed. Valves V101 and V102 are closed, valves V104 and V105 are opened, valve V103 is opened, water pump 150 is operated, and water is sent from water tank 140 to dewatering tank 120 through pipe L105. The organic solvent remaining on the surface of the dehydrating solvent 121 is removed by the flow of the water.

Before the drying step described later, a washing step using water, for example, washing with an inert gas such as nitrogen gas may be omitted, but the organic solvent is removed by washing with water, so that it is not necessary to use an expensive inert gas in the drying step.

In the washing step using water, the washing water discharged from the pipe L106 contains an organic solvent and is burned off, but it is preferable to open the valve V107 and return the washing water from the pipe L107 to the organic solvent tank 110 to be treated. Further, the tank 140 provided with the pipe L108 and the valve V108 is preferably returned. By doing so, the number of steps can be reduced, which is efficient.

[ drying Process ]

In the drying step, the following processes are performed. After the cleaning step, the valve V103 is closed, the valve V106 is opened, and the dry gas is sent to the dehydration tank 120 through the pipe L104. The moisture adsorbed on the dehydrating solvent is dried and removed by the flow of the drying gas. Therefore, the valves V104, V105, V106 and the pipe L104 function as a drying unit for passing the drying gas to the dehydration tank 120 and drying the moisture absorbed by the dehydrating agent 121.

The gas generated in the drying step can be treated by a generally used gas treatment apparatus such as a direct combustion type deodorizing apparatus, a combustion apparatus such as a catalytic combustion type deodorizing apparatus or a regenerative combustion type deodorizing apparatus, or an adsorption type solvent recovery apparatus.

In the drying step, the dew point temperature of the drying gas is preferably below zero when the temperature of the drying gas is 5 to 30 ℃. Since the lower the dew point temperature, the drier the gas, the shorter the drying time for removing moisture from the dehydrating solvent.

In order to lower the dew point temperature, a compressor is preferably used, and further, as a method for lowering the dew point temperature, a configuration in which an air dryer or the like, a heater or the like, or a combination of both is provided downstream of the compressor can further lower the dew point temperature.

(embodiment mode 2)

Fig. 2 is a block diagram of an organic solvent dehydration apparatus 200 according to embodiment 2. The organic solvent dehydration apparatus 200 is an apparatus for removing water contained in the organic solvent to be treated more efficiently than the organic solvent dehydration apparatus 100 shown in fig. 1. The organic solvent dehydrating apparatus 200 adds 1 dehydrating tank filled with a dehydrating agent to the structure of the organic solvent dehydrating apparatus 100, and further, adds a valve so that the following processes can be performed: the dehydration step, the cleaning step and the drying step are performed in each dehydration tank. After the execution of each step for a predetermined time, the treatment tank in which the dehydration step is executed is moved to the water washing and drying step, and the treatment tank in which the water washing and drying step is executed is moved to the dehydration step.

In the organic solvent dehydration apparatus 200 of embodiment 2, the apparatus having 2 dehydration tanks 220 and 230 is described, but the number of dehydration tanks is not limited, and the number may be increased according to the processing conditions.

(embodiments 3 and 4)

Fig. 3 is a block diagram of an organic solvent dehydration system 30 according to embodiment 3. The organic solvent dehydration system 30 shown in fig. 3 is a system including a vapor desorption type solvent recovery apparatus 300 and an organic solvent dehydration treatment apparatus 100. Fig. 4 is a block diagram of an organic solvent dehydration system 40 according to embodiment 4. The organic solvent dehydration system 40 shown in fig. 4 is a system including an inert gas circulation desorption type organic solvent recovery apparatus 300 and an organic solvent dehydration treatment apparatus 100.

In the organic solvent dehydration system 30, the organic solvent dehydration apparatus 100 performs dehydration treatment of the organic solvent discharged from the steam desorption type solvent recovery apparatus 300. In the organic solvent dehydration system 40, the organic solvent dehydration apparatus 100 performs dehydration treatment of the organic solvent discharged from the inert gas circulation desorption type solvent recovery apparatus 400. In fig. 4, nitrogen is disclosed as the inert gas.

For example, activated carbon can be used as the adsorption elements 321 and 331 of the vapor desorption solvent recovery device 300 and the adsorption element 421,431,441 of the inert gas circulation desorption solvent recovery device 400. As these adsorption elements, for example, the techniques disclosed in chinese patent No. ZL201110161539.1 and chinese utility model No. ZL201120200421.0 can be used. Further, as the vapor desorption type solvent recovery apparatus 300, for example, chinese utility model No. ZL201320397550.2, chinese utility model No. ZL201320397670.2, chinese utility model No. ZL201320405585.6, and chinese patent application No. 201780074301.0 can be used. Further, as the inert gas circulation desorption type solvent recovery apparatus 400, for example, chinese patent No. ZL201380065297.3 can be used.

The organic solvent dehydration apparatus 100 performs dehydration treatment of the organic solvent discharged from the inert gas circulation desorption type solvent recovery apparatus 400. The organic solvent dehydration system 30 shown in fig. 3 and the organic solvent dehydration system 40 shown in fig. 4 include the organic solvent dehydration apparatus 100, but may be configured to include the organic solvent dehydration apparatus 200 instead.

In the embodiments of the present invention described above, the constituent elements of the fluid transport means such as the pump and the fluid storage means such as the storage tank are not particularly shown in the description, but these constituent elements may be arranged in suitable positions as necessary.

[ possibility of Industrial utilization ]

The present invention can be used for dehydration of an organic solvent recovered from an organic solvent-containing gas generated in various factories, research facilities, and the like, for example, and can contribute to industry.

Claims (2)

1. An organic solvent dehydration device is characterized by comprising: a dehydrating tank filled with a dehydrating agent,

and a dehydration unit for passing the organic solvent to be treated containing water to the dehydration tank and dehydrating the organic solvent by absorbing the water by the dehydrating agent,

and a drying unit that passes a drying gas to the dehydration tank and dries the moisture absorbed by the dehydrating agent;

the dehydration and the drying are alternately performed.

2. An organic solvent dehydration system characterized by connecting the organic solvent dehydration apparatus according to claim 1 to a steam-type desorption solvent recovery apparatus or an inert gas circulation desorption solvent recovery apparatus.

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