JP2995155B2 - Waste liquid treatment apparatus and waste liquid treatment method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating waste liquid, and more particularly to an apparatus and a method for treating waste liquid after cleaning with an aqueous cleaning liquid.

[0002]

The present invention is an extension of the prior art described below.

[0003] In the case of self-treatment, even if a certain aqueous cleaning liquid is used to clean the same type of stains, equipment using semi-permeable membranes requires high equipment and running costs. In addition, in the case where a variety of aqueous cleaning liquids are used and various types of dirt are handled, equipment having a semipermeable membrane is required for each combination.

[0004] It is an object of the present invention to provide a waste liquid treatment apparatus capable of treating waste liquid after cleaning various objects using various water-based cleaning liquids with one facility.

[0005]

According to a first aspect of the present invention, waste heat in the waste liquid storage tank is reduced by transmitting heat generated by combustion in the furnace body to a waste liquid storage tank from a part of the furnace body. Wastewater treatment method that is
Burns wood, waste oil, etc., and treats waste liquid with only combustible waste
It is a waste liquid treatment method characterized by carrying out.

[0006] A second invention of the present invention provides a furnace body and a heat transfer plate in a tank.
An open waste liquid storage tank that is part of the wall and waste wood or
Is installed in a furnace and a combustion device for burning waste such as waste oil.
And a smoke exhaust means .

[0007] A third invention of the present invention comprises an exhaust gas temperature sensor.
In addition, the temperature at which the predetermined temperature is expected to be determined by the exhaust gas temperature sensor
Supply of fresh water that supplies fresh water to the waste liquid storage tank when the temperature is detected
A waste liquid treatment apparatus according to the second invention, comprising means.

A fourth aspect of the present invention is a waste liquid in a waste liquid storage tank.
Equipped with a minimum liquid level detecting means lower than the lower liquid level of
The water supply means is created based on the minimum liquid level signal detected by the level detection means.
The waste liquid treatment apparatus according to the second invention, wherein the waste liquid treatment apparatus is operated.

[0009] A fifth aspect of the present invention is a method for cleaning fresh water into a waste liquid storage tank.
Supply means and waste liquid supply means, the same as the liquid supply means.
A third means characterized in that sometimes the means for supplying fresh water is energized.
Is a waste liquid treatment apparatus according to a fourth aspect .

[0010]

2. Description of the Related Art Conventionally, chlorine-based organic solvents, for example, chlorofluorocarbon (trade name) have been widely used. However, laws and regulations have been imposed to prevent destruction of the ozone layer in the atmosphere. Is being used. Various types of water-based cleaning liquids have been proposed, and the types to be cleaned are also various.

In the case of cleaning an object with the aqueous cleaning liquid, if the waste liquid is to be disposed of in-house by using equipment, the aqueous cleaning liquid is recovered using a semipermeable membrane, and the components removed from the object to be cleaned are separated. doing. If the wastewater is not self-processed, a specialized company is requested to treat the wastewater.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A representative invention of the present invention is to reduce the volume of waste liquid in the waste liquid storage tank by transferring heat generated by combustion in the furnace from a part of the furnace body to a waste liquid storage tank. A waste liquid treatment method, wherein the height of the liquid level in the waste liquid storage tank is maintained at a certain level by adjusting the supply of the waste liquid. In another representative invention of the present invention, a part of the furnace body is a heat transfer plate, and a part of the furnace body as the heat transfer plate is a part of a waste liquid storage tank. As a result, the waste liquid evaporates water, collects dirt in the waste liquid, reduces the volume of combustible waste such as waste material, and has the effect of simultaneously processing waste liquid and combustible waste.

In the above, a waste liquid treatment tank is provided,
There is a mode in which once the waste liquid is treated, the waste liquid is sent from the treatment tank to the waste liquid treatment tank by a liquid supply pump or the like.

In the above, the provision of the inspection port inside the waste liquid treatment tank makes it easier to remove the processing residue after water evaporation from the waste liquid.

[0015] In the above-described embodiment, the drainage treatment tank is provided with a drain, so that only drained waste liquid which cannot be treated unless the waste liquid is once drained is easily taken out.

Further, in the above, since the liquid supply pump is driven by providing the upper and lower limit liquid level detecting means for the liquid level in the waste liquid storage tank, the waste liquid is automatically supplied.

In the above, if a water supply means is provided,
Water can be supplied to the waste liquid storage tank.

In the above, waste oil can be used effectively by detecting the temperature in the waste liquid storage tank and operating the combustion device.

In the above, by simultaneously controlling the supply means of the waste liquid and the fresh water to the waste liquid storage tank, there is no need to worry about empty heating. In addition, there is a mode in which the above-mentioned configuration is provided with an empty-fire detection unit.

[Detailed Description of Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment A) FIG. 1 is a flow sheet according to an embodiment A of the present invention. A furnace 1 is provided with a grate 2, and the furnace 1 has a chimney 3.
A stoker (not shown) for feeding the fuel F onto the grate 2, an ignition burner (not shown) for igniting the fuel F, and an air supply device for feeding combustion air onto the grate 2 through the air distribution chamber 1 a below the grate 2. It has.

In the above description, the fuel F to be burned on the grate 2 is waste such as timber waste, but may be waste tires.

The furnace body 1 has the shape shown in FIG. 1 and is provided with both side walls parallel to the plane of FIG. The top plate 1b of the furnace body 1 is a heat transfer plate, for example, a heat-resistant steel plate.
A waste liquid storage tank 4 is provided with b as a bottom plate. The top plate 1b is configured as a bottom plate of the waste liquid storage tank 4, and the furnace body 1
May be open at the top. That may be a can be placed separate waste savings built tank 4 on the furnace body 1. Waste liquid storage tank 4
The main body 4a has a flat circular square shape, and the upper part is open upward.
c is provided. The canopy 4c is supported by the waste liquid storage tank 4 by a stay (not shown). The canopy 4c has a larger planar projection figure than the main body 4a, and has a size including the main body 4a plane therein. The canopy 4c also has a peripheral edge 4c1 that hangs down so that rainwater does not enter the main body 4a.

An inspection port 4a1 is provided on a side surface of the main body 4a, and a lid 4d for sealing the inspection port 4a1 is detachably attached.

The waste liquid having been washed with the aqueous cleaning liquid is supplied from a waste liquid transport pipe 6 to a waste liquid treatment tank 5 through, for example, a ball tap 7.

Although the waste liquid treatment tank 5 will not be described in detail, any tank having a function of removing as much as possible the contents of the waste liquid may be used. Things are used. In addition, the liquid after filtration or adsorption may be fed to the waste liquid treatment tank 5 by a filtration or adsorption filter, as long as the content can be generally removed.

An electric motor driven liquid supply pump 11 in which a suction pipe 8 is immersed in a waste liquid in a waste liquid treatment tank 5 through a strainer 9.
Is connected to the waste liquid storage tank 4. The discharge pipe 12 is provided with a filter 13. The filter 13 filters the waste liquid sent to the waste liquid treatment tank 5 by the waste liquid transport pipe 6 and mechanically removes solid components in the waste liquid, or further, for example, when the waste liquid contains oil. This is a filter containing an adsorption filter element for adsorbing an oil emulsion.

The liquid level detector 1 is provided on the canopy 4c of the waste liquid storage tank 4.
The upper and lower liquid levels of the waste liquid in the waste liquid storage tank 4 are detected, and a signal thereof is sent to the liquid supply control device 15. The liquid level detector 14 is provided with two electrodes: an upper limit liquid level probe 14H whose hanging tips are at the upper limit liquid level position of the waste liquid in the waste liquid storage tank 4, and a lower limit liquid level probe 14L at the lower limit liquid level position. Although not shown, an earth electrode, an AC power supply, a current detector, and an upper limit liquid level probe 14 are provided on the top plate 1b and insulated from the top plate 1b.
A closed circuit is formed by H or the lower limit liquid level probe 14L and the waste liquid in the waste liquid storage tank 4. In addition, even when the waste liquid has no conductivity, a float with a magnet may be floated in the waste liquid storage tank 4 and a level switch operated by the magnetism of the magnet may be used as the liquid level detector 14.

The liquid supply control device 15 is provided with the aforementioned liquid level detector 14.
Where the signal H has been output from the liquid level detector 14 because the lower limit liquid level probe 14L is in the waste liquid in the waste liquid storage tank 4, the liquid level of the waste liquid drops due to evaporation, When the signal changes from H to L when the lower end of the position probe 14L is released, the driver 16 is driven to drive the liquid supply pump 11, and the liquid level of the waste liquid rises. When the probe 14H lands, the liquid level detector 1
When the signal L has been output from 4 to the present, when the signal is changed from L to H, the driver 16 for driving the pump 11 is deenergized and the liquid supply pump 11 is stopped. .

A drain pipe 17 for draining the waste liquid from the waste liquid storage tank 4 is provided. The drain pipe 17 is provided with an on-off valve 18. The drain pipe 17 is provided for discharging the waste liquid in the waste liquid storage tank 4 concentrated by evaporation as a drain. However, drain pipe 1
When the generated drain has a high viscosity and is difficult to flow, the drain 7 is mounted at a position away from the bottom of the waste liquid storage tank 4 by the depth of the drain, and the drain is provided for an inspection port 4a1 for cleaning.
Take it out of

The operation of the above configuration will be described.

The waste liquid sent from the waste liquid transport pipe 6 flows into the waste liquid treatment tank 5 via the ball tap 7. When the liquid level rises, the ball tap 7 closes, and when a liquid supply pump 11 described later pumps up the waste liquid in the waste liquid treatment tank 5, the ball tap 7 opens and the waste liquid treatment tank 5 passes through the waste liquid transport pipe 6 via the ball tap 7. And the liquid level in the waste liquid treatment tank 5 rises.

At the time of starting, the fuel such as the waste material sent onto the grate 2 in the furnace body 1 is ignited by an ignition burner (not shown) and starts burning, and thereafter burns to the fuel sent by the stoker by spreading. The combustion air is sent from an air supply device (not shown) to the air distribution chamber 1a,
The fuel is supplied around the fuel F and burned, and the flue gas is discharged to the atmosphere through the chimney 3 or discharged through a tar removing device or a deodorizing device (not shown) for removing tar components generated by the burning.

In the above, when the liquid level of the waste liquid in the waste liquid storage tank 4 is equal to or less than the lower limit liquid level probe 14L, the liquid supply control device 15 controls the liquid supply pump 11 via the driver 16 simultaneously with the ignition of the ignition burner at the time of starting. Energize. The liquid supply pump 11 pumps up the waste liquid in the waste liquid treatment tank 5 through the strainer 9 and the suction pipe 8, discharges the waste liquid through the discharge pipe 12, and
The solid content or the adsorbable component in the waste liquid is removed by 3
It is sent into the waste liquid storage tank 4. The waste liquid in the storage tank 4 is burned by the fuel F in the furnace body 1, and the top plate 1b of the heat transfer plate
, The waste liquid evaporates to become steam, and this steam is released to the atmosphere through the gap 4b. Since the flow rate of the waste liquid sent to the waste liquid storage tank 4 by the above-described liquid supply pump 11 is set higher than the evaporation rate of the waste liquid in the waste liquid storage tank 4, the liquid level of the waste liquid in the waste liquid storage tank 4 rises, When the liquid level probe 14L lands, the liquid level of the waste liquid further rises and reaches the upper limit liquid level probe 14H, the liquid level detector 14 sends a signal from the upper limit liquid level probe 14H to L → H. 15 and the driver 16 and the liquid supply pump 11 are turned off. In the state where the upper limit liquid level has been reached, the temperature of the waste liquid in the waste liquid storage tank 4 is lowered by the supply of new waste liquid.

As the combustion in the furnace body 1 continues, the temperature of the waste liquid rises from the upper limit liquid level, evaporates, and the water vapor is released into the atmosphere through the gap 4b.
The waste liquid in the liquid lowers with evaporation. Then, the upper limit liquid level probe 14H separates water, and eventually the lower limit liquid level probe 14H.
L separates.

When the lower limit liquid level probe 14L separates, the liquid level detector 14 changes from H to L at the lower limit liquid level probe 14L.
Is sent to the liquid supply control device 15 and the liquid supply control device 15 urges the liquid supply pump 11 via the driver 16. The liquid supply pump 11 pumps up the waste liquid in the waste liquid treatment tank 5,
Strainer 9 → Suction pipe 8 → Supply pump 11 → Discharge pipe 12
→ The waste liquid is sent to the filter 13 → the discharge pipe 12 → the waste liquid storage tank 4. As described above, the supply of the waste liquid to the waste liquid storage tank 4 is performed by urging the liquid supply pump 11 by the separation of the lower limit liquid level probe 14L to supply the waste liquid, and the pump 11 by the landing of the upper limit liquid level probe 14H. The on / off control for stopping is performed independently and independently of the combustion in the furnace body 1.

In this embodiment, when wood waste is used as fuel, combustion control in the furnace 1 is not performed.

Accordingly, in the case of a fuel which is not suitable for combustion control among combustible wastes, such as wood waste, etc., it is appropriately charged onto the grate 2 of the furnace body 1. Waste liquid is top plate 1b of heat transfer plate
Is evaporated through the gap 4b between the main body 4a of the waste liquid storage tank 4 and the canopy 4c and evaporates into the atmosphere.
As a result, as described above, the liquid level of the waste liquid in the waste liquid storage tank 4 drops, and the waste liquid is supplied by the above-described liquid supply control. Thus, the drain accumulates at the bottom of the waste liquid storage tank 4. When the drain accumulates, the drain discharge opening / closing valve 18 is opened to discharge the drain. When the drain has a high viscosity and cannot be discharged through the drain pipe 17, the drain pipe 17 is attached to the waste liquid storage tank 4 with the mounting position of the drain pipe 17 higher than the drain of the waste liquid storage tank 4. Therefore, the drainage in the waste liquid storage tank 4 is removed by opening the on-off valve 18 and draining the upper portion first, and then removing the lid 4d of the inspection port 4a1.

As described above, according to the present invention, by using the furnace body as a heat transfer plate and using the heat transfer plate as a constituent member of the waste liquid storage tank, two substances to be discarded can be treated simultaneously. That is, in the furnace body, there is an effect that the combustible waste is burned to reduce the incineration and the water content of the used water-based cleaning liquid is evaporated, and contaminants adhered to the cleaning target can be collected.
The control of the supply of the waste liquid to the waste liquid storage tank is independent of the combustion of the waste in the furnace, regardless of the presence or absence of the combustion control.

(Embodiment B) FIG. 2 shows a case where waste oil or the like is used as combustible waste. 2, the same members as those in FIG. 1 are denoted by the same reference numerals, and the description of Embodiment A is cited.

In FIG. 2, a combustion device 21 is provided instead of the air distribution chamber 1a and the grate 2 of FIG. The combustion device 21 includes a waste oil tank 22, a nozzle 23 provided in the furnace body 1, a fuel pressurizing pump 24 connected to the nozzle 23, a fuel pipe 25 between the fuel pressurizing pump 24 and the waste oil tank 22, a waste oil tank 25 in the fuel pipe 25. A stop valve 26, an electric flow control valve 27, and a fuel pressurizing pump
And blowing means 2 for feeding combustion air around nozzle 23
8 is provided. The blowing means 28 is a turbo fan driven by an electric motor (not shown) controlled by an inverter, and its discharge port is a divergent outlet 28 a which covers the nozzle 23 concentrically with the nozzle 23. or,
Although not shown, an ignition device for generating an electric spark toward the tip of the nozzle 23 is provided.

The flow rate of the flow rate control valve 27 and the blowing means 2
The adjustment of the air volume 8 is controlled by the combustion control device 32. The signal detected by the waste liquid temperature detector 31 for detecting the temperature of the waste liquid in the waste liquid storage tank 4 is transmitted to the combustion control device 3.
2 is input.

In this embodiment, the control of the supply of the waste liquid to the waste liquid storage tank 4 and the control of the combustion of the furnace body are performed separately and independently.

The operation of the above configuration will be described.

The control of the supply of the waste liquid is the same as that of the embodiment A, and the description of the embodiment A is referred to for the operation of the supply of the waste liquid.

The combustion control of the combustion device 21 is performed independently and independently of the waste liquid supply control.

When the combustion device 21 is started, a small amount of gasoline, not shown, supplies ignition fuel to the suction side of the combustion pressurizing pump 24 and ignites it.

When the combustion device 21 starts, the combustion control device 3
Numeral 2 restricts the flow rate of the flow control valve 27 so as to be suitable at the time of starting, controls the rotational speed of the blower means 28 by inverter control to control the rotational speed so as to have a flow rate suitable for starting, and drives the fuel pressurizing pump 24. . The fuel pressurizing pump 24,
Although the flow control valve 27 and the blowing means 28 are each driven from the combustion control device 32 via a driver, the driver will not be described below in order to simplify the description.

The fuel pressurizing pump 24 sucks and pressurizes the waste oil from the waste oil tank 22 through the open stop valve 26 and the flow control valve 27 in the fuel pipe 25, and pressurizes the waste oil from the nozzle 23. Spray into. At the same time, air is blown from the blowing means 28 so as to wrap the atomized fuel. By starting the combustion by the ignition, the combustion flame heats the waste liquid of the waste liquid storage tank 4 through the top plate 1b. The water vapor in the waste liquid evaporated by the heating of the waste liquid is converted into a gap 4b between the waste liquid storage tank 4 and the canopy 4c.
Through the atmosphere.

If the temperature of the waste liquid in the waste liquid storage tank 4 has not reached the boiling point, the combustion controller 32 receives a signal from the waste liquid temperature detector 31 and starts adjusting the fuel flow rate. In addition to maximizing the valve opening degree of the valve 27, the air volume is adjusted so that the blowing means 28 performs the optimal complete combustion corresponding to the waste oil flow rate. Thus, when the temperature of the waste liquid in the waste liquid storage tank 4 rises and reaches the boiling point, the waste liquid temperature detector 31 sends the signal to the combustion control device 32 and the combustion control device 32
Then, the waste oil flow control valve 27 is throttled so that the boiling of the waste oil is maintained, and the air blowing means 28 is reduced in amount to match the waste oil flow rate reduced by the throttle.

On the other hand, since the supply of waste liquid is controlled, when the liquid level of the waste liquid in the waste liquid storage tank 4 rises from the lower limit liquid level to the upper limit liquid level, the waste liquid temperature decreases. Although the liquid control is independently created, the lower temperature of the waste liquid causes the waste oil combustion device 21 to reach the maximum load and continue until the waste liquid boils at the upper limit liquid level, and thereafter, the waste oil is burned. This is to reduce the load on the device.

(Embodiment C) Although the above description is for the case where the waste liquid temperature detector 31 is used, the exhaust gas temperature can also be used. As shown in FIG.
An exhaust gas temperature sensor 33 for detecting the temperature of exhaust gas passing through the inside is provided.

When the waste liquid is not boiling, the amount of heat transfer from the combustion gas to the waste liquid is large. Therefore, the exhaust temperature is low. During normal startup, the waste liquid in the waste liquid storage tank 4 is at room temperature. Therefore, the temperature of the exhaust gas discharged through the chimney 3 is low. The exhaust gas temperature is detected by an exhaust gas temperature sensor 33, and a signal thereof is sent to the combustion control device 32. The combustion control device 32 increases the valve opening of the flow control valve 27 and increases the rotation speed of the blower 28 to increase the amount of blown air.

The ratio between the flow rate of the waste liquid and the flow rate of the air is determined so as to improve the combustion state. Thus, the calorific value increases, the temperature of the waste liquid in the waste liquid storage tank 4 rises, and when the waste liquid reaches the boiling point, the evaporation of the waste liquid becomes intense. Since the exhaust gas temperature also rises, the exhaust gas temperature sensor 33 detects the upper limit temperature and sends a signal to the combustion control device 32.
The combustion control device 32 receives the signal, and
Then, the blowing means 28 is throttled to reduce the amount of fuel and the amount of blowing air.

Thus, when the waste liquid in the waste liquid storage tank 4 evaporates and decreases, and is separated from the lower limit liquid level probe 14L, a new waste liquid is supplied and reaches the upper limit liquid level. Goes down. As a result, the exhaust gas temperature drops, so that the exhaust gas temperature sensor 33 detects the lowered exhaust gas temperature and sends a signal to the combustion control device 32. The combustion control device 32 increases the valve opening of the flow control valve 27 and
8 to increase the air flow rate by increasing the rotation speed. As a result, the amount of heating the waste liquid in the waste liquid storage tank 4 increases, and the temperature of the waste liquid rises and the exhaust temperature sensor 33 detects the exhaust temperature at the time of boiling, and sends the signal to the combustion control device 32. The combustion control device 32 reduces the calorific value of the combustion flame by reducing the waste oil flow rate and the blown air volume.

As described above, the waste liquid can be evaporated as quickly as possible while efficiently burning the waste oil.

In this example, it is preferable that the combustion control device 32 has the following functions. Now, if the supply of the waste liquid from the supply source of the waste liquid is interrupted, the waste liquid supply device supplies the waste liquid to the waste liquid storage tank 4 regardless of the fact that the supply of the waste liquid is controlled. Therefore, the liquid level of the waste liquid in the waste liquid treatment tank 5 is reduced by the strainer 9.
In the following cases, the liquid supply pump 11 does not supply the waste liquid into the waste liquid storage tank 4 regardless of the liquid supply control. Since the combustion control is performed independently of the liquid supply control, the waste liquid in the waste liquid storage tank 4 is reduced by evaporation, and the liquid level is lowered. Then, even if the lower limit liquid level probe 14L separates, no waste liquid is supplied. At this time, in the combustion control, the flow control valve 27 is throttled, and the blowing unit 28 also reduces the blowing amount so as to match the waste oil spray. However, since the waste liquid in the waste liquid storage tank 4 is boiling, evaporation is active. If this continues, the waste liquid in the waste liquid storage tank 4 will eventually disappear, and it will be empty-fired,
If this continues, the can plate of the waste liquid storage tank 4 will be damaged. In particular, the top plate 1b of the furnace body 1 is easily damaged.

The exhaust temperature sensor 33 detects a predetermined temperature that is higher than the exhaust temperature in the combustion state where the waste liquid in the waste liquid storage tank 4 boils and has the minimum calorific value. And the combustion control device 32 closes the flow control valve 27 (if the flow control valve 27 does not have a valve closing function, an electromagnetic valve is arranged in series with the flow control valve to close the electromagnetic valve) and the air is blown. The atmosphere is blown into the furnace body 1 with the means 28 as the maximum rotation speed to measure the cooling.

The third embodiment differs from the first embodiment in that waste oil is used, but is almost the same in effect. Further, in addition to the detection mode in which the exhaust temperature sensor 33 can detect the exhaust temperature exceeding the maximum temperature in addition to the minimum and maximum temperatures, the combustion control device 32 performs the combustion control between the minimum and maximum exhaust temperatures. Furnace body 1 and waste liquid storage tank 4
By providing a detection function for grasping the situation, the damage of the waste liquid storage tank can be particularly reduced.

(Embodiment 2) This embodiment 2 has a particularly large heat transfer area as shown in FIG. 4, and has a waste liquid storage tank 4 surrounding the furnace body 1 and the chimney 3. It has. The waste liquid storage tank 4 is configured to surround the entire periphery of the furnace body 1 except for the fuel supply port 1f and the bottom plate 1g and the entire periphery of the lower part of the chimney 3, and the boundary between the waste liquid storage tank 4 and the furnace body 1 and the chimney 3 is formed. Are the can plate of the waste liquid storage tank 4 and the furnace wall of the furnace 1 and the cylinder of the chimney 3, respectively. These can plates are heat transfer plates, and are preferably, for example, heat-resistant steel plates. It may be a site (product name). Although the can plate such as the top plate 1b is used for the furnace body 1, it may be used as a constituent member of the waste liquid storage tank 4, and this point is the same as in other embodiments.

The apparatus for supplying waste oil to the waste liquid storage tank 4 in this embodiment is the same as that in the embodiment A, so that the same reference numerals as those in the embodiment A are used, and the description of the embodiment A is used.

In this embodiment, a simple empty-fire prevention device is provided. The empty-fire prevention device 30 guides a water supply pipe 34 connected to a water source, for example, a tap to the waste liquid storage tank 4, interposes an electromagnetic valve 35 in the water supply pipe 34, and controls the liquid supply pump 1 by the liquid supply control device 15.
The solenoid valve 35 is opened at the same time as the driving of the solenoid valve 1.

In the embodiment (a), in a state where the waste liquid is not supplied to the waste liquid storage tank 4, the combustion control is performed independently of the liquid supply control, so that there is no danger of idling.

Therefore, in this embodiment, when the liquid level of the waste liquid in the waste liquid storage tank 4 drops and the lower limit liquid level probe 14L separates, the liquid supply control device 15 drives the liquid supply pump 11 via the driver 16 to process the waste liquid. The waste liquid in the tank 5 is supplied to the waste liquid storage tank 4 and the solenoid valve 35 is opened to supply tap water from the water supply pipe 34 to the waste liquid storage tank 4. Thus, the liquid level of the waste liquid mixed with the tap water in the waste liquid storage tank 4 rises and the upper limit liquid level probe 1
When 4H lands, the liquid supply control device 15 stops the liquid supply pump 11, closes the solenoid valve 35, and stops the supply of waste liquid and tap water to the waste liquid storage tank 4.

Now, when the liquid supply from the waste liquid transport pipe 6 to the waste liquid processing tank 5 is continuously stopped, the waste liquid in the waste liquid processing tank 5 is reduced by operating the liquid supply device, and finally the strainer 9 is operated. The liquid level drops to a level at which the waste liquid cannot be sucked. However, in the present embodiment, when the liquid level in the waste liquid storage tank 4 drops below the lower limit liquid level probe 14L, the solenoid valve 35 opens and the tap water is supplied to the waste liquid storage tank 4 through the water supply pipe 34. Therefore, if the supply amount of tap water is set to be larger than the amount of evaporation from the waste liquid in the waste liquid storage tank 4 due to the combustion of waste materials and the like in the furnace body 1, the liquid level in the waste liquid storage tank 4 will rise, and eventually Since the upper limit liquid level probe 14H lands upon supply of tap water, the liquid supply control device 15 stops the liquid supply pump 11 and closes the solenoid valve 35. Thus, the supply of tap water does not lead to empty firing. When the liquid level of the waste liquid eventually recovers, the mixed liquid of the waste liquid and the tap water is supplied again.

In the above description, the flow rate of tap water is made larger than the amount of evaporation of water from waste liquid and the like, and the waste liquid feed pump 1 is used.
If the flow rate of 1 is significantly larger than the flow rate of tap water, the amount of tap water used is small.

With the above, there is no danger of idle firing. The water supply device provided with the water supply pipe 34 and the electromagnetic valve 35 may be separately provided. In this case, the lower limit liquid level probe 1
A liquid level probe that separates at a liquid level lower than 4 L is provided,
The water supply device may be controlled separately. FIG. 5 shows such a water supply device. In FIG. 5, the water level detector 37 having the water supply level probe 37 a whose lower end is lower than the lower limit liquid level probe 14 L sends a signal to the liquid supply control device 15 when the water supply level probe 37 a has separated. Liquid supply control device 1
Numeral 5 denotes a liquid supply pump 1 which is idle and does not send liquid in this case.
1 is stopped, the solenoid valve 35 is opened, and tap water is sent to the waste liquid storage tank 4.

(Embodiment E) FIG. 6 shows an embodiment E. This embodiment E performs water supply control using an exhaust gas temperature sensor when incineration of waste materials or the like, for which combustion control is not performed, or when on / off control of waste oil is performed based on the combustion temperature. Since the present example can be applied regardless of the presence or absence of the combustion control, a case where the present embodiment is added to Embodiment A will be described.

In FIG. 6, the same members as those in FIG. 1 are denoted by the same reference numerals, and the description of FIG.

The signal from the exhaust gas temperature sensor 33 is sent to the water supply control device 38, and when the signal indicates a predetermined temperature higher than the maximum temperature of the exhaust gas temperature sensor 33, the electromagnetic valve is controlled. By opening the valve 35 and supplying the tap water to the waste liquid storage tank 4 with the water supply pipe 34, it is possible to prevent the water from being fired.

When the lower limit liquid level probe 14L is separated and the waste liquid is supplied to the waste liquid storage tank 4, if the waste liquid supply control is normal, empty heating cannot occur, but the waste liquid treatment tank 5
If the state where the waste liquid is not supplied continues, the waste liquid will not be supplied to the waste liquid storage tank 4 as already described, and even if the waste liquid level is separated from the lower limit liquid level probe 14L by evaporation,
When the liquid level continues to decrease and the amount of waste liquid in the waste liquid storage tank 4 decreases significantly, the waste liquid boils excessively, and the temperature of the combustion chamber rises.
The exhaust temperature rises. This exhaust temperature is used as an exhaust temperature sensor 3
3 is captured and sent to the water supply control device 38.
Detects the temperature and opens the solenoid valve 35, and the water supply pipe 34
Through the tap water flows into the waste liquid storage tank 4. The water level in the waste liquid storage tank 4 rises, and the upper limit liquid level probe 14H lands,
The signal from the upper limit liquid level probe 14H is supplied to the water supply control device 38.
And the water supply control device 38 closes the solenoid valve 35.

According to this embodiment E, the effect of the above-mentioned embodiment A can be further prevented.

[0073]

According to the present invention, as a method, incineration process and waste effluents can be performed at the same time, it can reduce the processing cost of the waste liquid.

According to the present invention, an apparatus for treating waste liquid
Waste treatment equipment that can simultaneously incinerate waste
Can be provided.

When a means for supplying fresh water to the waste liquid storage tank is provided, it can be used for cleaning the waste liquid storage tank. In addition,
It has smoke temperature detection means, and the temperature detection means
If the temperature is determined to be empty, the water supply means will be activated.
With this, it is possible to prevent empty burning.

If a minimum liquid level detecting means which is lower than the lower limit liquid level of the waste liquid in the waste liquid storage tank is provided, and the water supply means is operated by a signal from this means, it is possible to prevent dry burning.

[0077] Shimizu supply means to the waste liquid tank, the liquid supply Hand
Comprising a stage, and if so as to urge the liquid supply means at the same time supplying means of Shimizu, even extinct waste liquid supply boil-dry can be prevented.

[Brief description of the drawings]

FIG. 1 is a flow sheet according to an embodiment of the present invention.

FIG. 2 is a flow sheet according to the embodiment 2 of the present invention.

FIG. 3 is a flow sheet according to the embodiment C of the present invention.

FIG. 4 is a flow sheet according to the embodiment 2 of the present invention.

FIG. 5 is a flow sheet according to the embodiment 2 of the present invention.

FIG. 6 is a flow sheet according to the embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Furnace body 1a ... Air dispersion chamber 1b ... Top plate 1f ... Fuel supply port 1g ... Bottom plate 2 ... Grate 3 ... Chimney 4 ... Waste liquid storage tank 4a ... Main body 4a1 ... Inspection port 4b ...
Clearance 4c: canopy 4c1 ... peripheral edge 4d ... lid 5 ... waste liquid treatment tank 6 ... waste liquid transport pipe 7 ... ball tap 8 ... suction pipe 9 ... strainer 11 ... liquid supply pump 12 ... discharge pipe 13 ... filter 14 ... liquid level detector 14H: Upper limit liquid level probe 14L
... Lower limit liquid level probe 15 ... Supply control device 16 ... Driver 17 ... Drain pipe 18 ... On-off valve 21 ... Combustion device 22 ... Waste oil tank 23 ... Nozzle 24 ... Fuel pressurizing pump 25 ... Fuel pipe 26 ... Shut-off valve 27 ... Flow rate Control valve 28 ... Blowing means 28a ... Divergent outlet 30 ... Drying prevention device 31 ... Waste liquid temperature detector 32 ... Combustion control device 33 ... Exhaust temperature sensor 34 ... Water supply pipe 35 ... Solenoid valve 37 ... Water level detector 37a ... Water supply Liquid level probe 38: Water supply control device F: Fuel

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F23G 7/04 601 F23G 7/04 603

Claims (5)

(57) [Claims] 1. A waste liquid treatment method for reducing the volume of waste liquid in a waste liquid storage tank by transferring heat generated by combustion in a furnace body from a part of the furnace body to a waste liquid storage tank.
Burn waste wood, waste oil, etc. as fuel inside
A waste liquid treatment method characterized by treating only waste. 2. An opening in which a furnace body and a heat transfer plate are part of a tank wall.
Waste liquid storage tank and waste such as waste wood or waste oil in the furnace.
It has a combustion device for burning and smoke exhaust means provided in the furnace body.
A waste liquid treatment apparatus. 3. An exhaust temperature sensor comprising an exhaust temperature sensor.
Detects the temperature at which pre-determined empty boil is expected.
That fresh water supply means for supplying fresh water to the storage tank is provided.
The waste liquid treatment apparatus according to claim 2, wherein 4. A lower level of the waste liquid in the waste liquid storage tank than the lower limit liquid level.
Equipped with a minimum liquid level detection means.
Characterized by operating the water supply means by the lowest liquid level signal
The waste liquid treatment apparatus according to claim 2, wherein 5. A means for supplying fresh water to a waste liquid storage tank,
And a supply means for fresh water at the same time as the liquid supply means.
The waste liquid treatment apparatus according to claim 3 or 4, wherein the device is energized .