KR102240311B1 - DEVICE FOR CONDENSING AND SEPARATING VOCs - Google Patents

Abstract

The present invention provides an apparatus for condensing and recovering a volatile organic compound, including: a chamber including an inlet pipe through which an influent including a condensed volatile organic compound and a condensing solvent used for condensing the condensed volatile organic compound is introduced from a preceding process, an inner space filled with the condensing solvent such that a water level is located under the inlet pipe, and an outlet pipe for discharging the condensing solvent filled in the inner space; a recovery cup configured to allow the condensed volatile organic compound of the influent introduced through the inlet pipe to flow in while floating on the condensing solvent in the inner space of the chamber; a recovery line extending from a bottom surface of the recovery cup to an outside of the chamber, and configured to provide a recovery path for the condensed volatile organic compound flowing into the recovery cup; an elevation guide member installed in the inner space of the chamber to guide elevation of the recovery line; and a weight installed in the recovery line to apply a buoyancy offsetting load to the recovery cup, in which the buoyancy offsetting load is required to maintain a state where an upper end of the recovery cup is higher than the water level of the condensing solvent and lower than a water level of the condensed volatile organic compound. Accordingly, the condensed volatile organic compound is reliably separated and recovered from the condensing solvent.

Description

Volatile organic compound condensation and recovery device {DEVICE FOR CONDENSING AND SEPARATING VOCs}

The present invention relates to an apparatus for condensing and recovering volatile organic compounds, and more particularly, installed at the rear end of a condensation tank in which volatile organic compounds are condensed through gas-liquid contact between volatile organic compounds (VOCs) and a condensing solvent. It relates to a device for treating the influent from the bath.

Volatile Organic Compounds (VOCs, Volatile Organic Compounds) are a generic term for hydrocarbon compounds (benzene, formaldehyde, toluene, xylene, ethylene, styrene, acetaldehyde, etc.) that easily volatilize into the atmosphere and generate odors. It occurs in the process of painting, manufacturing and storage of paints, and sewage treatment, and also from automobile exhaust gases and construction materials.

These volatile organic compounds are substances that cause bad odor even at low concentrations and have a bad influence on the environment, and are very harmful substances as carcinogens that cause disorders in the nervous system through skin contact or respiratory inhalation. Therefore, measures are being taken for treatment in industrial facilities where volatile organic compounds are generated.

It is known to install an adsorption tower as a measure for the treatment of volatile organic compounds, and an example of the adsorption tower is disclosed in Korean Patent No. 10-2059835 (Volatile Organic Compound Treatment System with Activated Carbon Regeneration Function). In this registered patent, a plurality of adsorption towers are provided, and activated carbon cartridges are incorporated in each adsorption tower. In addition, in some of the adsorption towers, when volatile organic compounds of polluted gas are adsorbed to the activated carbon cartridge and the polluted gas is purified, the desorption process of regenerating the activated carbon cartridge by desorption of the volatile organic compounds adsorbed on the activated carbon cartridge is performed in the rest. This is done.

In addition, as disclosed in Registration Patent No. 10-1926171 (Volatile Organic Solvent Recovery Device), the volatile organic compounds desorbed from the activated carbon cartridge during regeneration of the adsorption tower are condensed using a condensing solvent (ethylene glycol, etc.), and then condensed volatile organic compounds. The recovery of volatile organic compounds is also known as a measure for the treatment of volatile organic compounds. In this registered patent, a gaseous volatile organic compound is introduced into a condensation tank filled with a condensing solvent, and then the gaseous volatile organic compound is condensed into a liquid state and then placed on the top of the condensing solvent due to the difference in specific gravity. Can be recovered from. At this time, to improve the condensation efficiency in the condensation tank, as disclosed in Patent No. 10-1773096 (Volatile Organic Compound Condensation Recovery and Reuse Device), a gaseous volatile organic compound and a condensation solvent may be stirred with a stirrer.

On the other hand, when condensing volatile organic compounds, a condensing solvent such as ethylene glycol is not used, and as disclosed in Registration Patent No. 10-0546841 (volatile organic compound recovery device), a volatile organic compound is brought into contact with the cooling coil through which the refrigerant flows. It is also condensed.

Registered Patent No. 10-2059835 (Volatile organic compound treatment system with activated carbon regeneration function) Registered Patent No. 10-1926171 (Volatile organic solvent recovery device) Registered Patent No. 10-1773096 (Volatile organic compound condensation recovery and reuse device) Registered Patent No. 10-0546841 (Volatile organic compound recovery device)

In the above Patent Registration No. 10-1926171 (Volatile Organic Solvent Recovery Device) and Registration Patent No. 10-1773096 (Volatile Organic Compound Condensation Recovery and Reuse Device), condensed volatile organic compounds condensed in a condensing tank are recovered. In this case, there is a problem that not only the condensed volatile organic compounds but also the condensed solvent in the condensing tank and the volatile organic compounds in a gas or bubble state are recovered.

Therefore, the present invention is installed at the rear end of the condensation tank where the volatile organic compounds are condensed through gas-liquid contact between the volatile organic compounds and the condensing solvent, and further condenses the uncondensed volatile organic compounds contained in the influent flowing from the condensing tank. At the same time, it is intended to provide a technology that can reliably separate and recover the condensed volatile organic compounds contained in the gastric influent and the additionally condensed volatile organic compounds from the organic solvent contained in the gastric influent.

The present invention provides an inlet pipe through which an inlet containing a condensed volatile organic compound and a condensed solvent used for condensation of the condensed volatile organic compound flows from a preceding process, and a water surface in which the condensed solvent is located below the inlet pipe. A chamber having an internal space filled to have a discharge pipe for discharging the condensed solvent filled in the internal space; A recovery cup provided to allow the condensed volatile organic compound of the inflow introduced through the inflow pipe to flow in while floating in the condensed solvent in the interior space of the chamber; A recovery line extending from a lower surface of the recovery cup to the outside of the chamber and providing a recovery path for condensed volatile organic compounds flowing into the recovery cup; An elevation guide member installed in the inner space of the chamber to guide the elevation of the recovery line; And a weight installed in the recovery line such that an upper end of the recovery cup is higher than the water level of the condensed solvent and lower than the water level of the condensed volatile organic compound. It provides an organic compound condensation and recovery device.

The elevating guide member may include a hollow tube having a hollow for passing the recovery line up and down; And a support for fixedly supporting the hollow pipe.

The support may be formed of a plurality of horizontal bars. In this case, the plurality of horizontal bars extend radially from the hollow tube at the same height and have an outer end fixed to the inner wall of the chamber.

The weight is provided to be fitted into the recovery line or removed from the recovery line, and a pedestal on which the weight weight inserted into the recovery line is placed is fixed to the recovery line.

A partition wall is installed in the inner space of the chamber so as to be positioned between the dropping point at which the inflow material falls from the inlet pipe and the recovery cup. In addition, the partition wall is provided to allow the condensed volatile organic compound of the inflow to flow toward the recovery cup while mitigating the fluctuation of the water surface spreading from the dropping point.

The partition wall may include an upper portion positioned above the water surface of the condensed solvent before the inflow material is introduced and a lower portion positioned below the water surface. In addition, a plurality of holes are provided in the upper portion or both of the upper and lower portions.

According to the present invention, the condensed volatile organic compounds recovered by mixing with the condensing solvent inadvertently in the preceding process can be reliably separated from the condensed solvent and recovered, and in addition, the gas introduced in the preceding process and/or the volatile organic in a bubble state. The compound can also be recovered by being liquefied as a condensed volatile organic compound.

In addition, according to the present invention, due to the elevating guide member, the recovery cup can stably move only in the vertical direction according to the level of the condensed solvent in the chamber.

Further, according to the present invention, the operation of installing the weight in the recovery line or separating it from the recovery line can be made very easily.

In addition, according to the present invention, the water surface fluctuation spreading from the dropping point of the influent can be alleviated before reaching the recovery cup, while there is no problem in flowing the condensed volatile organic compound toward the recovery cup.

1 is a longitudinal sectional view showing an apparatus for condensing and recovering volatile organic compounds according to the present invention.
2 is a perspective view showing the interior of the chamber of the volatile organic compound condensation and recovery device shown in FIG.

Hereinafter, preferred embodiments of an apparatus for condensing and recovering volatile organic compounds according to the present invention will be described in detail with reference to the drawings. The terms or words used below should not be interpreted as being limited to their usual or dictionary meanings, and based on the principle that the inventor can appropriately define the concept of terms in order to explain his or her invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention.

The device 100 for condensing and recovering volatile organic compounds according to the present invention is suitable to be installed at the rear end of the preceding process. Here, the preceding process refers to condensing the gaseous volatile organic compounds desorbed from the activated carbon cartridge during regeneration of the adsorption tower through direct contact with a condensing solvent (ethylene glycol, etc.), and then recovering the condensed volatile organic compounds in the liquid state. I mean fair. Such a preceding process may be a process using the device of Registration Patent No. 10-1926171 or Registration Patent No. 10-1773096 mentioned in the prior art document.

The volatile organic compound condensation and recovery device 100 includes a chamber 110, a recovery cup 120, a recovery line 122, a lifting guide member 130, and a weight 140 as shown in FIGS. 1 and 2. ).

The chamber 110 includes an inlet pipe 112 at an upper portion of the side, through which the inlet material recovered in the preceding process flows into the inner space 110a of the chamber 110. As described above, the condensed volatile organic compound is recovered from the preceding process, and at this time, not only the condensed volatile organic compound but also the condensed solvent are unintentionally recovered together. Accordingly, the influent flowing into the chamber 10 through the inlet pipe 112 includes both condensed volatile organic compounds and unintentionally recovered condensed solvents. In addition, the influent recovered in the preceding process may contain some non-condensed flash organic compounds in a gaseous state without condensation and/or a bubble state dissolved in a condensing solvent, and the influent is non-condensed volatile. It may also contain organic compounds.

The inner space 110a of the chamber 110 is filled with a condensed solvent 10 of -10°C in advance before the inflow of the inflow, but the water surface 10a of the condensed solvent 10 is at the bottom of the inlet pipe 112 Filled to be located in.

When the condensed solvent 10 is filled in the inner space 110a of the chamber 110 as above and the influent flows from the inlet pipe 112, the condensed solvent contained in the influent is added to the upper water surface 10a. The height rises higher than the inlet pipe 112, and in addition, the condensed volatile organic compound 20 contained in the influent is added to the water surface 20a higher than the water surface 10a of the condensed solvent 10. Here, the reason why the water surface 20a of the condensed volatile organic compound 20 is higher than the water surface 10a of the condensing solvent 10 is that the specific gravity of the volatile organic compound [the specific gravity of toluene as a representative substance is about 0.87] is the condensing solvent ( This is because the specific gravity of 10) [the specific gravity of ethylene glycol, which is a representative substance, is about 1.11], and the condensed volatile organic compound 20 forms a layer on the water surface 10a of the condensed solvent 10.

When the above rising phenomenon of the water surfaces 10a and 20a is left unattended, a point in time when the influent cannot flow into the chamber 110 from the inlet pipe 112 is reached, and the chamber 110 is a discharge pipe ( 114). The condensed solvent 10 in the inner space 110a of the chamber 110 is discharged to the outside of the chamber 110 through the discharge pipe 114, and the discharge at this time is the condensed solvent even if the influent flows into the chamber 110. The water surface 10a of (10) is set to such an extent that it can be maintained at the initial level. The above discharge amount can be set by operating the valve 114a installed in the discharge pipe 114. The above valve 114a may be a manual valve or a solenoid valve.

On the other hand, the condensed solvent 10 discharged through the discharge pipe 114 is cooled in a heat exchanger (not shown) and used as a condensing solvent in a preceding process, and then included in the influent and introduced into the chamber 110. And in the above heat exchanger, the condensed solvent 10 is cooled to a temperature lower than -10°C (about -15°C), which means that the temperature of the condensed solvent contained in the influent is the inner space (110a) of the chamber 110 The temperature of the condensed solvent 10 in the chamber 110 is maintained at about -10°C even if the influent flows into the chamber 110 by making the temperature of the condensed solvent 10 pre-filled in the chamber 110. to be.

The recovery cup 120 is a member having an upper surface as a completely open surface and a hole in the lower surface, and floating in the condensed solvent 10 in the chamber 110. The condensed volatile organic compound 20 that is included in the influent and flows into the inner space 110a of the chamber 110 and forms a layer on the water surface 10a of the condensed solvent 10 reaches the top of the recovery cup 120. By flowing into the inside of the recovery cup 120, it is recovered into the recovery cup 120.

The recovery line 122 is provided in a form extending from the bottom surface of the recovery cup 120 to the outside of the chamber 110, so that the condensed volatile organic compounds flowing into the recovery cup 120 move to the outside of the chamber 110. Provide a recovery route for

The recovery line 122 may include a vertical pipe 122a, a horizontal pipe 122c, and a connection hose 122b. The upper vertical pipe (122a) extends downward from the lower surface of the recovery cup (120), the horizontal pipe (122c) is fixed to the side of the chamber (110) while horizontally penetrating the side of the chamber (110), and a connection hose ( 122b) connects the vertical pipe 122a and the horizontal pipe 122c. The condensed volatile organic compound flowing into the recovery cup 120 is recovered to the outside of the chamber 110 while flowing along the recovery line 122.

The lifting guide member 130 is installed in the inner space 110a of the chamber 110 to guide the lifting of the recovery line 122, more specifically, the lifting of the vertical pipe 122a of the recovery line 122. . When the elevating guide member 130 is provided, the recovery cup 120 floating in the condensed solvent 10 cannot move in all directions, and can only rise or fall according to the level of the condensed solvent 10.

The elevating guide member 130 may include a hollow pipe 130a and a support 130b. The hollow pipe (130a) has a hollow for passing the vertical pipe (122a) of the recovery line (122) up and down. In addition, the diameter of the hollow of the hollow pipe (130a) is provided slightly larger than the outer diameter of the vertical pipe (122a) so that the vertical pipe (122a) can be lifted smoothly. The upper support (130b) is for fixing the hollow pipe (130a), as shown, may be made of a plurality of horizontal bars (130b). The horizontal bars 130b are located at the same height and extend radially from the outer surface of the hollow tube 130a. And the outer ends of the horizontal bars (130b) is fixed to the inner wall of the chamber (110). 1 and 2 illustrate an example in which three horizontal bars 130b are arranged at intervals of 120 degrees, it goes without saying that the number of horizontal bars 130b may be different.

On the other hand, in order for the condensed volatile organic compound 20 in the upper layer of the condensed solution 10 to continuously flow into the inside of the recovery cup 120, even in a situation in which the inflow continues to flow from the inlet pipe 112, the recovery cup 120 The upper end of) should be maintained between the water surface 10a of the condensed solution 10 and the water surface 20a of the condensed volatile organic compound 20. Accordingly, in the present invention, the vertical pipe 122a of the recovery line 122 ) The weight 140 is installed.

For installation of the weight 140, a pedestal 142 is fixed to the vertical pipe 122a of the recovery line 122. And the weight 140 has a "U"-shaped groove with one side open, and is inserted into the vertical pipe (122a) through the upper "U"-shaped groove to be placed on the pedestal 142 or from the vertical pipe (122a) You can fall out.

When the weight 140 fitted in the vertical pipe 122a is positioned higher than the water surface 10a of the condensed solvent 10 and lower than the water surface 20a of the condensed volatile organic compound 20, the upper end of the recovery cup 120 The same load as the buoyancy that the recovery cup 120 receives, that is, a buoyancy offset load must be applied to the recovery cup 120. Accordingly, the operator fits the weights of the weights 140 to the same as the buoyancy offset load while inserting the weights 140 of various weights into the vertical pipe 122a.

The device 100 for condensing and recovering volatile organic compounds according to the present invention may further include a partition wall 150, and the partition wall 150 will be described below.

The partition wall 150 is a rectangular plate, in the inner space 110a of the chamber 110 so as to take a vertical posture between the dropping point at which the inflow material falls from the inlet pipe 112 and the recovery cup 120. Is installed. The lower end of the partition wall 150 is fixed to the support 130b of the elevating guide member 130, and the left and right sides of the partition wall 150 may be in contact with the inner wall of the chamber 110 and are slightly separated from the inner wall of the chamber 110. You may have it. In addition, although not shown, the lower end of the partition wall 150 may be positioned higher than the upper support 130b. In this case, the partition wall 150 is fixed to the inner wall of the chamber 110 so that the left and right ends of the partition wall 150 are fixed to the inner wall of the chamber 110. 150 can be installed.

The partition wall 150 is divided into an upper portion 150a positioned above and a lower portion 150b positioned below, based on the water surface 10a of the condensed solvent 10 before the influent is introduced. In addition, a plurality of holes 152 are provided in the upper portion 150a. In FIG. 2, the holes 152 are provided in a rectangular shape to form a line, but the shape of the holes 152 may be circular or elliptical, and the arrangement of the holes 152 may be a plurality of rows. In addition, the holes 152 may be provided in part or all of the lower portion 150b of the partition wall 150.

When the influent falls into the condensed solvent 10 in the chamber 110, the water surface fluctuates from the dropping point and spreads toward the recovery cup 120. Then, the recovery cup 120 includes not only the condensed volatile organic compound 20, but also the condensed volatile organic compound 20. In addition, the condensed solvent 10 may also flow. However, when the partition wall 150 as above is installed, the water surface fluctuation spreading from the dropping point is prevented by the partition wall 150, so that the water surface fluctuation is very alleviated or hardly occurs around the recovery cup 120, and in addition, the condensation solvent 10 ) The condensed volatile organic compound in the upper layer may flow toward the recovery cup 120 while passing through some of the holes 152 of the partition wall 150 (the holes 152 in the upper portion 150a).

The operation process of the volatile organic compound condensation and recovery device 100 described above is as follows.

First, a weight 140 having the same weight as the pre-calculated buoyancy offset load is installed in the recovery line 120, and a low-temperature condensed solvent 10 is placed in the inner space 110a of the chamber 110 at a predetermined water level. Fill as much as possible. Then, the recovery cup 120 floats on the condensed solvent 10, and at this time, the upper end of the recovery cup 120 is positioned slightly above the water surface 10a of the condensed solvent 10.

Thereafter, the influent from the inlet pipe 112 flows into the inner space 110a of the chamber 110, and the valve 114a installed in the discharge pipe 114 is opened by a predetermined amount, thereby condensing and recovering volatile organic compounds ( 100) starts.

When the volatile organic compound condensation and recovery device 100 is operated, even if the condensed solvent of the influent is added to the condensed solvent 10 in the chamber 110, the level of the condensed solvent 10 is maintained almost the same as the initial level, and the inflow The condensed volatile organic compound 20 of water forms a layer on the water surface 10a of the condensing solvent 10 due to the difference in specific gravity. In addition, the non-condensed volatile organic compound in the form of bubbles dissolved in the condensed solvent of the influent is liquefied into the condensed volatile organic compound 20 while continuing to stay in the low-temperature condensing solvent 10 in the chamber 110. ) Rises above the water surface 10a, and the gaseous volatile organic compounds contained in the inflow are continuously exposed to the low-temperature environment in the chamber 110, thereby being liquefied into the condensed volatile organic compounds 20, It is added to layer 20.

The condensed volatile organic compound 20 as above forming a layer on the condensed solvent 10 flows into the recovery cup 120 and is recovered to the outside of the chamber 110 along the recovery line 120. And since the water surface sway spreading from the dropping point of the influent is mitigated by the partition wall 150, water surface sway hardly occurs around the recovery cup 120, and for this reason, the condensed solvent 10 is almost completely used in the recovery cup 120. It does not flow in.

As described above, although the present invention has been described by the limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following by those of ordinary skill in the art to which the present invention pertains. It goes without saying that various modifications and variations may be made within the equivalent range of the claims to be described, and the above-described embodiments may be variously combined.

10: condensed solvent 20: condensed volatile organic compound
100: volatile organic compound condensation and recovery device
110: chamber 112: inlet pipe
114: discharge pipe 120: recovery cup
122: recovery line 130: lifting guide member
130a: hollow pipe 130b: support
140: weight 142: stand
150: bulkhead 152: hole

Claims (6)

An internal space filled with an inlet pipe through which the condensed volatile organic compound and the condensed solvent used for condensation of the condensed volatile organic compound flows from the preceding process, and the condensed solvent has a water surface located below the inlet pipe. And a chamber having a discharge pipe for discharging the condensed solvent filled in the inner space;
A recovery cup provided to allow the condensed volatile organic compound of the inflow introduced through the inflow pipe to flow in while floating in the condensed solvent in the interior space of the chamber;
A recovery line extending from a lower surface of the recovery cup to the outside of the chamber and providing a recovery path for condensed volatile organic compounds flowing into the recovery cup;
An elevation guide member installed in the inner space of the chamber to guide the elevation of the recovery line; And
A weight installed in the recovery line to apply a buoyancy offset load required to maintain a state in which the upper end of the recovery cup is higher than the water level of the condensed solvent and lower than the water level of the condensed volatile organic compound to the recovery cup; and
In the inner space of the chamber, a partition wall is installed to be located between a drop point where the inflow material falls from the inlet pipe and the recovery cup, and the partition wall is condensed volatile organic matter of the inlet while mitigating the water surface fluctuation spreading from the drop point. A volatile organic compound condensation and recovery device provided to allow the compound to flow toward the recovery cup. The method of claim 1,
The elevating guide member,
A hollow pipe having a hollow for passing the recovery line up and down; And
Volatile organic compound condensation and recovery device comprising a; a support for fixedly supporting the hollow pipe. The method of claim 2,
The support is made of a plurality of horizontal bars, the plurality of horizontal bars radially extending from the hollow pipe at the same height, the volatile organic compound condensation and recovery device having an outer end fixed to the inner wall of the chamber. The method of claim 1,
The weight is provided to be inserted into the recovery line or removed from the recovery line, and a volatile organic compound condensation and recovery device in which a pedestal on which the weight is placed inserted into the recovery line is fixed to the recovery line. delete The method of claim 1,
The partition wall includes an upper portion positioned above the water surface of the condensed solvent before the inflow material and a lower portion positioned below, and a plurality of holes are provided in the upper portion or both of the upper and lower portions. Compound condensation and recovery device.

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