JP2005013879A - Waste liquid treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple and low-cost waste liquid treatment apparatus which can forcibly eliminate bubbles generated and accumulated when waste liquid is heated and concentrated, and makes the deterioration of waste liquid treatment capacity of the apparatus small due to a small temperature drop at the bubble elimination. <P>SOLUTION: In the waste liquid treatment apparatus where the waste liquid E stored in a treatment tank 1 is heated by a heating means 3 to be evaporated and concentrated, an air sucking means 4 and an air blowing means 6 which forcibly discharge evaporated material generated from the waste liquid E quickly to the outside of the treatment tank 1 are installed. The air sucking means 4 or the air blowing means 6 uses blowing air pressure to introduce outside air to the liquid surface of the waste liquid E or to blow air thereto, thereby forcibly eliminating the bubbles B accumulated on the liquid surface of the waste liquid E. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waste liquid processing apparatus that heats and concentrates a waste liquid, for example, a waste liquid processing apparatus that reduces the amount of waste liquid by heating and concentrating the waste liquid that is discharged during food manufacturing processing such as pickles and strawberries.
[0002]
[Prior art]
As is well known, as one of the methods for treating the waste liquid, the waste liquid stored in the treatment tank is heated to evaporate the water, thereby concentrating the waste liquid to reduce the volume. However, depending on the type of waste liquid to be treated, a large amount of bubbles may be generated from the waste liquid during heating and concentration, and these bubbles may accumulate on the liquid surface and overflow from the treatment tank.
[0003]
In order to cope with this problem, it is conventionally detected by the foam detector that the stacked foam has reached the predetermined height of the processing tank, and until the foam level drops to some extent, the heating to the waste liquid is weakened to generate new foam. The apparatus which suppresses is proposed (refer patent document 1).
[0004]
However, since this device reduced the temperature of the waste liquid by natural heat dissipation and suppressed the generation of bubbles, the better the heat insulation of the treatment tank, the longer it took to lower the bubble level, and the suppression of heating during this period However, there has been a problem that the waste liquid processing capacity of the apparatus is greatly reduced. In addition, since this device must wait for the foams that have been deposited to disappear by itself, it takes longer to lower the bubble level when processing waste liquids that are difficult to defoam. It was damaged.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-61203
[Problems to be solved by the invention]
The present invention was made in view of the above-mentioned drawbacks in the conventional waste liquid treatment equipment by heat concentration, and can immediately and forcibly defoam the bubbles laminated on the liquid surface of the waste liquid, In addition, it is an object of the present invention to provide a waste liquid treatment apparatus having a simple structure and low cost, in which the temperature of the waste liquid itself during defoaming is small and the waste liquid treatment capability of the apparatus is not significantly reduced.
[0007]
[Means for Solving the Problems]
The present invention is a waste liquid treatment apparatus for concentrating by evaporating the waste liquid by heating the waste liquid stored in the treatment tank by a heating means,
Intake means for sucking evaporant generated in the treatment tank is provided, and outside air is guided to the liquid level of the waste liquid using suction pressure of the intake means, and the evaporate is forcibly exhausted together with the outside air by the intake means. It is characterized by that.
[0008]
Further, the present invention is a waste liquid treatment apparatus for concentrating by evaporating the waste liquid by heating the waste liquid stored in the treatment tank by a heating means,
A blower for blowing air to the liquid level of the waste liquid is provided, and the evaporant generated in the treatment tank is forcibly exhausted together with the outside air by using the blower pressure of the blower.
[0009]
Furthermore, the present invention is characterized in that the upper part of the treatment tank is opened.
[0010]
Furthermore, the present invention is characterized in that the upper part of the processing tank is opened, and the intake means includes an exhaust hood that moves up and down so as to be openable and closable with respect to the open part of the processing tank.
[0011]
Furthermore, the present invention is characterized by comprising spraying means for spraying untreated waste liquid from above into the waste liquid of the treatment tank.
[0012]
Furthermore, the present invention is characterized in that the heating means includes a steam boiler that generates steam, and a steam pipe that is disposed in the tank of the processing tank 1 and passes the steam.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a waste liquid treatment apparatus according to an embodiment of the present invention will be described with reference to FIG. In the present embodiment, an example is described in which the waste liquid discharged when manufacturing pickles (pickles pickled) is processed. This waste liquid contains a large amount of sugar, and bubbles foamed at the time of heating and concentration are unlikely to disappear spontaneously and are easily laminated on the liquid surface.
[0014]
In FIG. 1, what is indicated by reference numeral 1 is a processing tank for storing waste liquid E to be processed. The processing tank 1 is open at the top to form an open portion, and a discharge hole 11 is provided at the bottom. A discharge pipe 12 having a valve 13 is connected to the discharge hole 11, and the treated waste liquid can be discharged by opening and closing the valve 13. In addition, a heat insulating material is provided around the processing tank 1 to keep the heated waste liquid E warm.
[0015]
What is indicated by reference numeral 2 is a supply means for supplying waste liquid to the treatment tank 1. The supply means 2 includes a storage tank 21 that stores untreated waste liquid, and a pump 22 that pumps the waste liquid of the storage tank 21 to the spraying means 24 through the supply pipe 23. The spraying means 24 is composed of an annular pipe material having a large number of ejection holes, and is disposed along the open portion of the processing tank 1. By discharging the waste liquid pumped by the pump 22 from a large number of ejection holes, the untreated waste liquid is sprayed onto the waste liquid E in the treatment tank 1 from above.
[0016]
What is indicated by reference numeral 3 is a heating means for heating the waste liquid E in the processing tank 1. The heating means 3 of this embodiment includes a steam boiler 31 that generates steam and a steam pipe 32 through which the steam passes. The steam pipe 32 is disposed at the bottom of the processing tank 1 so as to face the tank, and the waste liquid E in the processing tank 1 is heated via the steam pipe 32 by the heat of the steam. The length, diameter, position, and the like of the steam pipe 32 in the processing tank 1 can be variously changed in consideration of the waste liquid capacity of the processing tank 1, the type of the waste liquid E, and the like.
[0017]
What is indicated by reference numeral 4 is an intake means for sucking evaporate generated from the waste liquid E in the treatment tank 1. The intake means 4 of the present embodiment includes an intake duct 41 disposed above the processing tank 1, an intake fan 42 connected to the intake duct 41, and an exhaust hood 43 disposed at the lower end of the intake duct 41. It is composed of The intake means 4 is provided on a fixed frame (not shown) so as to be movable up and down, and is configured to be movable up and down with respect to the open portion of the processing tank 1. When the intake means 4 is lowered to the lowest position, the exhaust hood 43 can close the open portion of the processing tank 1. The intake duct 41 and the intake fan 42 of the intake means 4 are fixed, and the exhaust hood 43 is disposed in the intake duct 41 via a flexible pipe (not shown), so that only the exhaust hood 43 is placed in the processing tank 1. On the other hand, it may be configured to be movable up and down.
[0018]
Hereinafter, the processing operation of the waste liquid E by the waste liquid processing apparatus of this embodiment will be described.
[0019]
First, untreated waste liquid is supplied into the treatment tank 1, and this waste liquid is heated by the heating means 3 to start the concentration process of the waste liquid E. As the liquid temperature of the waste liquid E rises, an evaporant is generated from the waste liquid E, and bubbles B are generated and start to be stacked on the liquid surface of the waste liquid E. At this time, the suction means 4 is operated, and the suction means 4 sucks evaporate, and the outside pressure is guided to the liquid level of the waste liquid E using the suction pressure. The outside air comes into contact with the bubbles B stacked on the liquid surface of the waste liquid E, and the bubbles B are defoamed by the wind pressure and the temperature drop of the bubbles.
[0020]
As shown in FIG. 1, the outside air that eliminates the bubbles B is guided to the liquid level of the waste liquid E through the gap between the exhaust hood 43 of the intake means 4 and the open portion of the treatment tank 1. Therefore, the flow rate / flow velocity of the outside air contacting the bubbles B can be adjusted as appropriate by changing the suction force of the intake fan 42 and the interval between the exhaust hood 43 and the open portion of the treatment tank 1. Therefore, for example, when processing waste liquid that does not foam during heat concentration, or waste liquid that does not immediately stack and foam does not stack even after foaming, the exhaust hood 43 is moved down to keep the treatment tank 1 warm. It is possible to perform the waste liquid treatment in a state where the open portion is closed.
[0021]
In this way, heating and concentration of the waste liquid E is proceeded while the bubbles B are defoamed by the outside air, and when the waste liquid E is concentrated to a predetermined concentration, the supply means 2 is operated to supply the untreated waste liquid to the treatment tank 1. The waste liquid treatment apparatus of this embodiment can supply unprocessed waste liquid to the waste liquid E in the treatment tank 1 from above by the spraying means 24 and supply the waste liquid E by bringing the sprayed waste liquid into contact with the bubbles B. Bubble B can be defoamed. Therefore, the untreated waste liquid may be sprayed and supplied during the heat concentration.
[0022]
When the heat concentration of the waste liquid E in the treatment tank 1 is finished, the valve 13 at the bottom of the treatment tank 1 is opened to discharge the treated concentrated waste liquid from the discharge hole 11.
[0023]
As described above, according to the waste liquid treatment apparatus of the present embodiment, since the evaporant generated from the waste liquid E can be actively sucked by the intake means 4, the evaporant at the time of heating and concentration can be quickly treated. Can be forced to the outside. Moreover, since the inside of the processing tank 1 can be kept in a reduced pressure state to some extent by the suction force of the intake means 4, the evaporation of the waste liquid E can be promoted, and the waste liquid processing capability of the apparatus can be improved.
[0024]
Further, according to the waste liquid treatment apparatus of the present embodiment, the outside air is guided to the liquid surface of the waste liquid E by using the suction pressure of the suction means 4, and the outside air is brought into contact with the bubbles B so that the bubbles B are immediately forcibly removed. can do. Therefore, unlike the conventional apparatus, there is no need to wait for the liquid temperature of the waste liquid to be lowered and the foam level to drop naturally, and this defoaming process greatly reduces the waste liquid processing capacity of the apparatus. There is no such thing.
[0025]
Furthermore, according to the waste liquid treatment apparatus of the present embodiment, it is possible to forcibly defoam bubbles with the outside air, so there is no need to suppress heating of the waste liquid E during defoaming, and heating of the waste liquid can be continued as it is. Is possible. In addition, since the contact with the outside air is also limited to the bubbles B stacked on the liquid surface of the waste liquid E, the temperature of the waste liquid itself due to the introduction of the outside air is small, and the waste liquid treatment capacity is greatly increased as in the conventional apparatus. There is no decline.
[0026]
Furthermore, since the waste liquid treatment apparatus of the present embodiment uses the air intake means 4 for promoting the evaporation of the waste liquid E at the same time as the defoaming means for the bubbles B, the apparatus configuration can be greatly simplified. It is possible to provide a waste liquid treatment apparatus having an excellent processing capacity to the market at a much lower cost.
[0027]
Although one embodiment of the present invention has been described above, the waste liquid treatment apparatus according to the present invention can be implemented in other forms.
[0028]
For example, in the above embodiment, the intake means 4 is provided so as to be able to move up and down above the processing tank 1 with the upper part opened, and the outside air is guided through the gap between the exhaust hood 43 and the open part of the processing tank 1. 2, the intake duct 41 of the intake means 4 may be directly connected to the upper portion of the processing tank 5, and the outside air may be guided through the outside air inlet 51 opened in the processing tank 5. This can further simplify the apparatus configuration. In this case, adjustment of the flow rate or the like of the outside air can be performed by changing the suction force of the intake fan 42.
[0029]
Moreover, in the said embodiment, although the spreading | diffusion means 24 of the supply means 2 is comprised with the annular pipe material provided with many ejection holes, of course, it is not limited to this, As also shown in FIG. You may comprise the spreading | diffusion means 25 with the cylindrical member provided with many ejection holes. Further, a plurality of spraying means 25 may be disposed in the processing tank 5.
[0030]
Furthermore, in the above embodiment, the intake means 4 is provided above the treatment tank 1 with the upper part opened. However, as shown in FIG. Means 6 may be provided. The blowing unit 6 includes a blower duct 61 disposed above the processing tank 1 and a blower fan 62 connected to the blower duct 61. When the waste liquid E is heated and the bubbles B start to be laminated on the liquid surface, the blower fan 62 is operated to blow air to the liquid surface of the waste liquid E, and the bubbles B are extinguished by the wind pressure and the bubble temperature drop at that time. Foam. And the evaporant which generate | occur | produces in the processing tank 1 is forcedly exhausted rapidly using the ventilation pressure of this ventilation means 6. FIG. Note that the air blowing to the liquid level of the waste liquid E may be performed by, for example, cold air or hot air. Various changes can be made in consideration of the defoaming effect of the bubbles B, the waste liquid treatment capability of the apparatus, and the like.
[0031]
Also in the waste liquid treatment apparatus according to this embodiment, since the evaporate at the time of heating and concentration can be forcibly exhausted to the outside of the treatment tank 1, evaporation of the waste liquid E can be promoted, and the waste liquid treatment capacity of the apparatus Can be improved. And since the ventilation of the ventilation means 6 is made to contact the bubble B and the bubble B can be immediately forced to defoam, and it is not always necessary to suppress the heating to the waste liquid E during the defoaming, as in the conventional device The waste liquid treatment capacity is not significantly reduced during defoaming.
[0032]
Furthermore, in the said embodiment, although the steam heat obtained with the steam boiler 31 is utilized as the heating means 3 which heats the waste liquid E, this invention is never limited to this, For example, a processing tank The waste liquid E is heated by an electric heater disposed in the tank 1, the waste liquid E is heated by electromagnetic induction heating of the treatment tank 1, or the waste liquid E is heated by gas combustion heat from the outside. You may make it heat.
[0033]
Furthermore, although the said embodiment demonstrated the example which processes the waste liquid E discharged | emitted when manufacturing pickles, of course, it is not limited to this, For example, it discharge | emits at the time of livestock production and meat processing The present invention can be applied to the treatment of various waste liquids such as waste liquids, manure, and industrial waste liquids such as machine cleaning liquids.
[0034]
The present invention can be implemented in a mode in which various improvements, changes, and modifications are made based on the knowledge of those skilled in the art without departing from the spirit of the present invention. In addition, within a range where the same action or effect is produced, any invention specific matter may be replaced with another technology, and the integrally configured invention specific matter may be made up of a plurality of members. Even if comprised, you may implement with the form which comprised the invention specific matter comprised from the several member integrally.
[0035]
【The invention's effect】
As described above, according to the waste liquid treatment apparatus according to the present invention, the evaporant generated from the waste liquid can be forcibly exhausted to the outside of the treatment tank quickly by the intake means or the air blowing means, thus promoting the evaporation of the waste liquid. It is possible to improve the waste liquid processing capacity of the apparatus.
[0036]
In addition, by using the suction pressure of the suction means or the blowing pressure of the blowing means, the outside air is guided or blown to the liquid level of the waste liquid, and the bubbles stacked on the liquid level of the waste liquid can be immediately forcibly defoamed. This eliminates the need to lower the temperature of the waste liquid itself and wait for the foam to drop naturally and reduce the foam level, unlike the conventional equipment. This defoaming process significantly reduces the waste liquid treatment capacity of the equipment. There is nothing to do.
[0037]
Furthermore, since the bubbles stacked on the liquid surface of the waste liquid can be forcibly defoamed immediately in this way, it is not necessary to suppress the heating of the waste liquid at the time of defoaming, and the heating to the waste liquid can be continued as it is. is there. Moreover, since the introduction or blowing of outside air is also limited to the bubbles stacked on the liquid surface of the waste liquid, there is little temperature drop of the waste liquid itself at the time of defoaming, and the waste liquid processing capacity is greatly increased as in the conventional device. There is no decline.
[0038]
Furthermore, since the waste liquid treatment apparatus of the present embodiment uses the air intake means or the air blowing means for promoting the evaporation of the waste liquid at the same time as the foam defoaming means, the apparatus configuration can be greatly simplified. It is possible to provide a waste liquid treatment apparatus having an excellent processing capacity to the market at a much lower cost.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional front view of a waste liquid treatment apparatus of the present invention.
FIG. 2 is a partial cross-sectional front view of a waste liquid treatment apparatus according to a modification of the present invention.
FIG. 3 is a partial cross-sectional front view of a waste liquid treatment apparatus according to another modification of the present invention.
[Explanation of symbols]
E Waste liquid B Bubble 1 Processing tank 11 Discharge hole 12 Discharge pipe 13 Valve 2 Supply means 21 Storage tank 22 Pump 23 Supply pipe 24 Dispersion means 25 Dispersion means 3 Heating means 31 Steam boiler 32 Steam pipe 4 Intake means 41 Intake duct 42 Intake fan 42 43 Exhaust hood 5 Treatment tank 51 Outside air intake 6 Blower means 61 Blower duct 62 Blower fan

Claims (6)

A waste liquid treatment apparatus that heats waste liquid stored in a treatment tank by heating means to evaporate the waste liquid and concentrates the waste liquid,
Intake means for sucking evaporant generated in the treatment tank is provided, and outside air is guided to the liquid level of the waste liquid using suction pressure of the intake means, and the evaporate is forcibly exhausted together with the outside air by the intake means. Waste liquid treatment equipment characterized by that. A waste liquid treatment apparatus that heats waste liquid stored in a treatment tank by a heating means to evaporate the waste liquid and concentrate the waste liquid,
A waste liquid treatment apparatus comprising a blower for blowing air to the liquid surface of the waste liquid, and forcibly exhausting the evaporate generated in the treatment tank together with the outside air by using the blow pressure of the blower. The waste liquid treatment apparatus according to claim 1 or 2, wherein an upper part of the treatment tank is opened. The waste liquid treatment apparatus according to claim 1, wherein an upper portion of the treatment tank is open, and the intake means includes an exhaust hood that moves up and down in an openable and closable manner with respect to the open portion of the treatment tank. The waste liquid processing apparatus according to any one of claims 1 to 4, further comprising spraying means for spraying untreated waste liquid from above into the waste liquid in the treatment tank. The waste liquid treatment apparatus according to any one of claims 1 to 5, wherein the heating means includes a steam boiler that generates steam and a steam pipe that is disposed in the tank of the processing tank 1 and passes the steam.

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